Re-add third-party/abseil-cpp

Bug: 261600888
Test: no build files yet
Change-Id: If35de46c822c629640fa888126290b98ee4dc41d

646 files changed, 53659 insertions, 8735 deletions

diff --git a/third_party/abseil-cpp/.clang-format b/third_party/abseil-cpp/.clang-format
deleted file mode 100644
index 06ea346a10..0000000000
--- a/third_party/abseil-cpp/.clang-format
+++ /dev/null
@@ -1,4 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-...
diff --git a/third_party/abseil-cpp/.gitignore b/third_party/abseil-cpp/.gitignore
deleted file mode 100644
index d54fa5a91f..0000000000
--- a/third_party/abseil-cpp/.gitignore
+++ /dev/null
@@ -1,15 +0,0 @@
-# Ignore all bazel-* symlinks.
-/bazel-*
-# Ignore Bazel verbose explanations
---verbose_explanations
-# Ignore CMake usual build directory
-build
-# Ignore Vim files
-*.swp
-# Ignore QtCreator Project file
-CMakeLists.txt.user
-# Ignore VS Code files
-.vscode/*
-# Ignore generated python artifacts
-*.pyc
-copts/__pycache__/
diff --git a/third_party/abseil-cpp/Android.bp b/third_party/abseil-cpp/Android.bp
index 756aafd276..c5c99ffee6 100644
--- a/third_party/abseil-cpp/Android.bp
+++ b/third_party/abseil-cpp/Android.bp
@@ -51,188 +51,3 @@ cc_library_headers {
     ],
 }
 
-cc_library_host_static {
-    name: "libwebrtc_absl_base",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/base/internal/cycleclock.cc",
-        "absl/base/internal/low_level_alloc.cc",
-        "absl/base/internal/raw_logging.cc",
-        "absl/base/internal/spinlock.cc",
-        "absl/base/internal/spinlock_wait.cc",
-        "absl/base/internal/strerror.cc",
-        "absl/base/internal/sysinfo.cc",
-        "absl/base/internal/thread_identity.cc",
-        "absl/base/internal/throw_delegate.cc",
-        "absl/base/internal/unscaledcycleclock.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_container",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/container/internal/test_instance_tracker.cc",
-        "absl/container/internal/hash_generator_testing.cc",
-        "absl/container/internal/hashtablez_sampler.cc",
-        "absl/container/internal/hashtablez_sampler_force_weak_definition.cc",
-        "absl/container/internal/raw_hash_set.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_debugging",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/debugging/failure_signal_handler.cc",
-        "absl/debugging/internal/address_is_readable.cc",
-        "absl/debugging/internal/demangle.cc",
-        "absl/debugging/internal/elf_mem_image.cc",
-        "absl/debugging/internal/examine_stack.cc",
-        "absl/debugging/internal/stack_consumption.cc",
-        "absl/debugging/internal/vdso_support.cc",
-        "absl/debugging/leak_check.cc",
-        "absl/debugging/stacktrace.cc",
-        "absl/debugging/symbolize.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_flags",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/flags/commandlineflag.cc",
-        "absl/flags/usage_config.cc",
-        "absl/flags/marshalling.cc",
-        "absl/flags/usage.cc",
-        "absl/flags/flag.cc",
-        "absl/flags/parse.cc",
-        "absl/flags/internal/commandlineflag.cc",
-        "absl/flags/internal/flag.cc",
-        "absl/flags/internal/private_handle_accessor.cc",
-        "absl/flags/internal/program_name.cc",
-        "absl/flags/internal/usage.cc",
-        "absl/flags/flag_test_defs.cc",
-        "absl/flags/reflection.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_hash",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/hash/internal/city.cc",
-        "absl/hash/internal/hash.cc",
-        "absl/hash/internal/low_level_hash.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_numeric",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: ["absl/numeric/int128.cc"],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_profiling",
-    srcs: [
-        "absl/profiling/internal/exponential_biased.cc",
-        "absl/profiling/internal/periodic_sampler.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_status",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/status/status.cc",
-        "absl/status/status_payload_printer.cc",
-        "absl/status/statusor.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_strings",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/strings/ascii.cc",
-        "absl/strings/charconv.cc",
-        "absl/strings/cord.cc",
-        "absl/strings/escaping.cc",
-        "absl/strings/internal/charconv_bigint.cc",
-        "absl/strings/internal/charconv_parse.cc",
-        "absl/strings/internal/cord_internal.cc",
-        "absl/strings/internal/cord_rep_btree.cc",
-        "absl/strings/internal/cord_rep_btree_navigator.cc",
-        "absl/strings/internal/cord_rep_btree_reader.cc",
-        "absl/strings/internal/cord_rep_consume.cc",
-        "absl/strings/internal/cord_rep_ring.cc",
-        "absl/strings/internal/cordz_functions.cc",
-        "absl/strings/internal/cordz_handle.cc",
-        "absl/strings/internal/cordz_info.cc",
-        "absl/strings/internal/escaping.cc",
-        "absl/strings/internal/memutil.cc",
-        "absl/strings/internal/ostringstream.cc",
-        "absl/strings/internal/str_format/arg.cc",
-        "absl/strings/internal/str_format/bind.cc",
-        "absl/strings/internal/str_format/extension.cc",
-        "absl/strings/internal/str_format/float_conversion.cc",
-        "absl/strings/internal/str_format/output.cc",
-        "absl/strings/internal/str_format/parser.cc",
-        "absl/strings/internal/utf8.cc",
-        "absl/strings/match.cc",
-        "absl/strings/numbers.cc",
-        "absl/strings/str_cat.cc",
-        "absl/strings/str_replace.cc",
-        "absl/strings/str_split.cc",
-        "absl/strings/string_view.cc",
-        "absl/strings/substitute.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_synchronization",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/synchronization/barrier.cc",
-        "absl/synchronization/blocking_counter.cc",
-        "absl/synchronization/internal/create_thread_identity.cc",
-        "absl/synchronization/internal/per_thread_sem.cc",
-        "absl/synchronization/internal/waiter.cc",
-        "absl/synchronization/internal/graphcycles.cc",
-        "absl/synchronization/notification.cc",
-        "absl/synchronization/mutex.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_time",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/time/civil_time.cc",
-        "absl/time/clock.cc",
-        "absl/time/duration.cc",
-        "absl/time/format.cc",
-        "absl/time/internal/cctz/src/civil_time_detail.cc",
-        "absl/time/internal/cctz/src/time_zone_fixed.cc",
-        "absl/time/internal/cctz/src/time_zone_format.cc",
-        "absl/time/internal/cctz/src/time_zone_if.cc",
-        "absl/time/internal/cctz/src/time_zone_impl.cc",
-        "absl/time/internal/cctz/src/time_zone_info.cc",
-        "absl/time/internal/cctz/src/time_zone_libc.cc",
-        "absl/time/internal/cctz/src/time_zone_lookup.cc",
-        "absl/time/internal/cctz/src/time_zone_posix.cc",
-        "absl/time/internal/cctz/src/zone_info_source.cc",
-        "absl/time/time.cc",
-    ],
-}
-
-cc_library_host_static {
-    name: "libwebrtc_absl_types",
-    defaults: ["libwebrtc_absl_defaults"],
-    srcs: [
-        "absl/types/bad_any_cast.cc",
-        "absl/types/bad_optional_access.cc",
-        "absl/types/bad_variant_access.cc",
-    ],
-}
diff --git a/third_party/abseil-cpp/BUILD.gn b/third_party/abseil-cpp/BUILD.gn
new file mode 100644
index 0000000000..e1c5dabdaf
--- /dev/null
+++ b/third_party/abseil-cpp/BUILD.gn
@@ -0,0 +1,265 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Flags specified here must not impact ABI. Code compiled with and without these
+# opts will be linked together, and in some cases headers compiled with and
+# without these options will be part of the same program.
+
+import("//build/config/c++/c++.gni")
+import("//build/config/nacl/config.gni")
+import("//build/config/sanitizers/sanitizers.gni")
+import("//build/toolchain/toolchain.gni")
+import("//build_overrides/build.gni")
+import("//third_party/abseil-cpp/absl.gni")
+
+config("absl_component_build") {
+  defines = [ "ABSL_CONSUME_DLL" ]
+}
+
+assert(!is_nacl || is_nacl_saigo,
+       "base must not be built in most nacl toolchains")
+
+component("absl") {
+  public_deps = [ ":absl_component_deps" ]
+  if (is_component_build) {
+    public_configs = [ ":absl_component_build" ]
+
+    if (is_win && is_clang) {
+      if (current_cpu == "x64") {
+        if (is_debug) {
+          sources = [ "symbols_x64_dbg.def" ]
+        } else {
+          if (is_asan) {
+            sources = [ "symbols_x64_rel_asan.def" ]
+          } else {
+            sources = [ "symbols_x64_rel.def" ]
+          }
+        }
+      }
+      if (current_cpu == "x86") {
+        if (is_debug) {
+          sources = [ "symbols_x86_dbg.def" ]
+        } else {
+          sources = [ "symbols_x86_rel.def" ]
+        }
+      }
+      if (current_cpu == "arm64") {
+        if (is_debug) {
+          sources = [ "symbols_arm64_dbg.def" ]
+        } else {
+          sources = [ "symbols_arm64_rel.def" ]
+        }
+      }
+    }
+  }
+}
+
+group("absl_component_deps") {
+  public_deps = [
+    "//third_party/abseil-cpp/absl/algorithm:container",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/cleanup",
+    "//third_party/abseil-cpp/absl/container:btree",
+    "//third_party/abseil-cpp/absl/container:fixed_array",
+    "//third_party/abseil-cpp/absl/container:flat_hash_map",
+    "//third_party/abseil-cpp/absl/container:flat_hash_set",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/container:node_hash_map",
+    "//third_party/abseil-cpp/absl/container:node_hash_set",
+    "//third_party/abseil-cpp/absl/debugging:failure_signal_handler",
+    "//third_party/abseil-cpp/absl/debugging:stacktrace",
+    "//third_party/abseil-cpp/absl/debugging:symbolize",
+    "//third_party/abseil-cpp/absl/functional:any_invocable",
+    "//third_party/abseil-cpp/absl/functional:bind_front",
+    "//third_party/abseil-cpp/absl/functional:function_ref",
+    "//third_party/abseil-cpp/absl/hash",
+    "//third_party/abseil-cpp/absl/log:die_if_null",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+    "//third_party/abseil-cpp/absl/random",
+    "//third_party/abseil-cpp/absl/random:distributions",
+    "//third_party/abseil-cpp/absl/status",
+    "//third_party/abseil-cpp/absl/status:statusor",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:cord",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/types:span",
+    "//third_party/abseil-cpp/absl/types:variant",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+
+  # The following dependencies currently don't build with NaCl.
+  # TODO(https://crbug.com/1114625): Fix build errors and remove this section.
+  if (is_nacl) {
+    public_deps -=
+        [ "//third_party/abseil-cpp/absl/debugging:failure_signal_handler" ]
+  }
+
+  visibility = [ ":absl" ]
+}
+
+group("default") {
+  deps = [
+    "absl/types:any",
+    "absl/types:bad_any_cast",
+    "absl/types:bad_optional_access",
+    "absl/types:optional",
+    "absl/types:span",
+  ]
+}
+
+config("absl_include_config") {
+  include_dirs = [ "." ]
+}
+
+config("absl_define_config") {
+  defines = [ "ABSL_ALLOCATOR_NOTHROW=1" ]
+
+  if (is_win && !use_custom_libcxx) {
+    defines += [
+      # See crbug.com/1101367: Acknowledge extended alignment when using
+      # MSVC's standard library.
+      "_ENABLE_EXTENDED_ALIGNED_STORAGE",
+    ]
+  }
+}
+
+config("absl_default_cflags_cc") {
+  cflags_cc = []
+  if (is_clang) {
+    cflags_cc += [
+      # TODO(crbug.com/588506): Explicitly enable conversion warnings.
+      "-Wbool-conversion",
+      "-Wconstant-conversion",
+      "-Wenum-conversion",
+      "-Wint-conversion",
+      "-Wliteral-conversion",
+      "-Wnon-literal-null-conversion",
+      "-Wnull-conversion",
+      "-Wobjc-literal-conversion",
+      "-Wstring-conversion",
+    ]
+    if (!is_nacl) {
+      cflags_cc += [ "-Wbitfield-enum-conversion" ]
+    }
+  }
+}
+
+config("absl_test_cflags_cc") {
+  cflags_cc = []
+  if (is_clang || !is_win) {
+    cflags_cc += [
+      "-Wno-conversion-null",
+      "-Wno-missing-declarations",
+      "-Wno-unused-function",
+      "-Wno-unused-parameter",
+      "-Wno-unused-private-field",
+    ]
+  }
+  if (is_win) {
+    cflags_cc += [
+      "/wd4101",  # unreferenced local variable
+    ]
+  }
+}
+
+config("absl_test_config") {
+  cflags_cc = []
+  if (is_win && !is_clang) {
+    cflags_cc += [ "/wd4996" ]
+  }
+  if (is_clang) {
+    cflags_cc += [
+      "-Wno-deprecated-declarations",
+      "-Wno-unused-private-field",
+      "-Wno-unused-function",
+    ]
+  }
+}
+
+if (build_with_chromium) {
+  import("//testing/test.gni")
+
+  if (!is_component_build) {
+    test("absl_tests") {
+      testonly = true
+      deps = [
+        "absl/algorithm:algorithm_test",
+        "absl/algorithm:container_test",
+        "absl/base:config_test",
+        "absl/base:prefetch_test",
+        "absl/cleanup:cleanup_test",
+        "absl/container:common_policy_traits_test",
+        "absl/container:inlined_vector_test",
+        "absl/container:node_slot_policy_test",
+        "absl/container:sample_element_size_test",
+        "absl/functional:any_invocable_test",
+        "absl/hash:hash_test",
+        "absl/hash:low_level_hash_test",
+        "absl/log:basic_log_test",
+        "absl/log:check_test",
+        "absl/log:die_if_null_test",
+        "absl/log:flags_test",
+        "absl/log:globals_test",
+        "absl/log:log_entry_test",
+        "absl/log:log_format_test",
+        "absl/log:log_macro_hygiene_test",
+        "absl/log:log_modifier_methods_test",
+        "absl/log:log_sink_test",
+        "absl/log:log_streamer_test",
+        "absl/log:scoped_mock_log_test",
+        "absl/log:stripping_test",
+        "absl/log/internal:stderr_log_sink_test",
+        "absl/memory:memory_test",
+        "absl/meta:type_traits_test",
+        "absl/profiling:exponential_biased_test",
+        "absl/profiling:periodic_sampler_test",
+        "absl/status:statusor_test",
+        "absl/strings:ascii_test",
+        "absl/strings:cord_buffer_test",
+        "absl/strings:cord_data_edge_test",
+        "absl/strings:cord_rep_btree_navigator_test",
+        "absl/strings:cord_rep_btree_reader_test",
+        "absl/strings:cord_rep_btree_test",
+        "absl/strings:cord_rep_crc_test",
+        "absl/strings:cordz_functions_test",
+        "absl/strings:cordz_info_statistics_test",
+        "absl/strings:cordz_info_test",
+        "absl/strings:cordz_test",
+        "absl/strings:cordz_update_scope_test",
+        "absl/strings:cordz_update_tracker_test",
+        "absl/strings:damerau_levenshtein_distance_test",
+        "absl/strings:match_test",
+        "absl/strings:str_replace_test",
+        "absl/strings:string_view_test",
+        "absl/types:optional_test",
+        "absl/types:variant_test",
+        "//third_party/googletest:gtest_main",
+      ]
+    }
+  }
+
+  test("absl_hardening_tests") {
+    testonly = true
+    sources = [ "absl_hardening_test.cc" ]
+    deps = [
+      "//base/test:run_all_unittests",
+      "//third_party/abseil-cpp/absl/base:config",
+      "//third_party/abseil-cpp/absl/container:fixed_array",
+      "//third_party/abseil-cpp/absl/container:inlined_vector",
+      "//third_party/abseil-cpp/absl/strings",
+      "//third_party/abseil-cpp/absl/types:optional",
+      "//third_party/abseil-cpp/absl/types:span",
+      "//third_party/abseil-cpp/absl/types:variant",
+      "//third_party/googletest:gtest",
+    ]
+  }
+}
diff --git a/third_party/abseil-cpp/CMake/AbseilDll.cmake b/third_party/abseil-cpp/CMake/AbseilDll.cmake
index fa323ff84b..a4560df5e2 100644
--- a/third_party/abseil-cpp/CMake/AbseilDll.cmake
+++ b/third_party/abseil-cpp/CMake/AbseilDll.cmake
@@ -13,8 +13,8 @@ set(ABSL_INTERNAL_DLL_FILES
   "base/internal/atomic_hook.h"
   "base/internal/cycleclock.cc"
   "base/internal/cycleclock.h"
+  "base/internal/cycleclock_config.h"
   "base/internal/direct_mmap.h"
-  "base/internal/dynamic_annotations.h"
   "base/internal/endian.h"
   "base/internal/errno_saver.h"
   "base/internal/fast_type_id.h"
@@ -26,6 +26,7 @@ set(ABSL_INTERNAL_DLL_FILES
   "base/internal/low_level_alloc.h"
   "base/internal/low_level_scheduling.h"
   "base/internal/per_thread_tls.h"
+  "base/internal/prefetch.h"
   "base/internal/pretty_function.h"
   "base/internal/raw_logging.cc"
   "base/internal/raw_logging.h"
@@ -40,7 +41,6 @@ set(ABSL_INTERNAL_DLL_FILES
   "base/internal/spinlock_wait.h"
   "base/internal/sysinfo.cc"
   "base/internal/sysinfo.h"
-  "base/internal/thread_annotations.h"
   "base/internal/thread_identity.cc"
   "base/internal/thread_identity.h"
   "base/internal/throw_delegate.cc"
@@ -49,6 +49,7 @@ set(ABSL_INTERNAL_DLL_FILES
   "base/internal/unaligned_access.h"
   "base/internal/unscaledcycleclock.cc"
   "base/internal/unscaledcycleclock.h"
+  "base/internal/unscaledcycleclock_config.h"
   "base/log_severity.cc"
   "base/log_severity.h"
   "base/macros.h"
@@ -68,6 +69,7 @@ set(ABSL_INTERNAL_DLL_FILES
   "container/internal/btree.h"
   "container/internal/btree_container.h"
   "container/internal/common.h"
+  "container/internal/common_policy_traits.h"
   "container/internal/compressed_tuple.h"
   "container/internal/container_memory.h"
   "container/internal/counting_allocator.h"
@@ -78,10 +80,9 @@ set(ABSL_INTERNAL_DLL_FILES
   "container/internal/hashtablez_sampler.cc"
   "container/internal/hashtablez_sampler.h"
   "container/internal/hashtablez_sampler_force_weak_definition.cc"
-  "container/internal/have_sse.h"
   "container/internal/inlined_vector.h"
   "container/internal/layout.h"
-  "container/internal/node_hash_policy.h"
+  "container/internal/node_slot_policy.h"
   "container/internal/raw_hash_map.h"
   "container/internal/raw_hash_set.cc"
   "container/internal/raw_hash_set.h"
@@ -91,7 +92,6 @@ set(ABSL_INTERNAL_DLL_FILES
   "debugging/failure_signal_handler.cc"
   "debugging/failure_signal_handler.h"
   "debugging/leak_check.h"
-  "debugging/leak_check_disable.cc"
   "debugging/stacktrace.cc"
   "debugging/stacktrace.h"
   "debugging/symbolize.cc"
@@ -110,9 +110,11 @@ set(ABSL_INTERNAL_DLL_FILES
   "debugging/internal/symbolize.h"
   "debugging/internal/vdso_support.cc"
   "debugging/internal/vdso_support.h"
+  "functional/any_invocable.h"
   "functional/internal/front_binder.h"
   "functional/bind_front.h"
   "functional/function_ref.h"
+  "functional/internal/any_invocable.h"
   "functional/internal/function_ref.h"
   "hash/hash.h"
   "hash/internal/city.h"
@@ -196,22 +198,29 @@ set(ABSL_INTERNAL_DLL_FILES
   "strings/charconv.h"
   "strings/cord.cc"
   "strings/cord.h"
+  "strings/cord_analysis.cc"
+  "strings/cord_analysis.h"
+  "strings/cord_buffer.cc"
+  "strings/cord_buffer.h"
   "strings/escaping.cc"
   "strings/escaping.h"
   "strings/internal/charconv_bigint.cc"
   "strings/internal/charconv_bigint.h"
   "strings/internal/charconv_parse.cc"
   "strings/internal/charconv_parse.h"
+  "strings/internal/cord_data_edge.h"
   "strings/internal/cord_internal.cc"
   "strings/internal/cord_internal.h"
-  "strings/internal/cord_rep_consume.h"
-  "strings/internal/cord_rep_consume.cc"
   "strings/internal/cord_rep_btree.cc"
   "strings/internal/cord_rep_btree.h"
   "strings/internal/cord_rep_btree_navigator.cc"
   "strings/internal/cord_rep_btree_navigator.h"
   "strings/internal/cord_rep_btree_reader.cc"
   "strings/internal/cord_rep_btree_reader.h"
+  "strings/internal/cord_rep_crc.cc"
+  "strings/internal/cord_rep_crc.h"
+  "strings/internal/cord_rep_consume.h"
+  "strings/internal/cord_rep_consume.cc"
   "strings/internal/cord_rep_flat.h"
   "strings/internal/cord_rep_ring.cc"
   "strings/internal/cord_rep_ring.h"
@@ -227,8 +236,12 @@ set(ABSL_INTERNAL_DLL_FILES
   "strings/internal/cordz_statistics.h"
   "strings/internal/cordz_update_scope.h"
   "strings/internal/cordz_update_tracker.h"
+  "strings/internal/damerau_levenshtein_distance.h"
+  "strings/internal/damerau_levenshtein_distance.cc"
   "strings/internal/stl_type_traits.h"
   "strings/internal/string_constant.h"
+  "strings/internal/stringify_sink.h"
+  "strings/internal/stringify_sink.cc"
   "strings/match.cc"
   "strings/match.h"
   "strings/numbers.cc"
@@ -341,126 +354,155 @@ set(ABSL_INTERNAL_DLL_FILES
   "types/internal/span.h"
   "types/variant.h"
   "utility/utility.h"
+  "debugging/leak_check.cc"
 )
 
 set(ABSL_INTERNAL_DLL_TARGETS
-  "stacktrace"
-  "symbolize"
-  "examine_stack"
-  "failure_signal_handler"
-  "debugging_internal"
-  "demangle_internal"
-  "leak_check"
-  "leak_check_disable"
-  "stack_consumption"
-  "debugging"
-  "hash"
-  "spy_hash_state"
-  "city"
-  "memory"
-  "strings"
-  "strings_internal"
-  "cord"
-  "str_format"
-  "str_format_internal"
-  "pow10_helper"
-  "int128"
-  "numeric"
-  "utility"
+  "algorithm"
+  "algorithm_container"
   "any"
+  "any_invocable"
+  "atomic_hook"
   "bad_any_cast"
   "bad_any_cast_impl"
-  "span"
-  "optional"
   "bad_optional_access"
   "bad_variant_access"
-  "variant"
-  "compare"
-  "algorithm"
-  "algorithm_container"
-  "graphcycles_internal"
-  "kernel_timeout_internal"
-  "synchronization"
-  "thread_pool"
+  "base"
+  "base_internal"
   "bind_front"
-  "function_ref"
-  "atomic_hook"
-  "log_severity"
-  "raw_logging_internal"
-  "spinlock_wait"
+  "bits"
+  "btree"
+  "city"
+  "civil_time"
+  "compare"
+  "compressed_tuple"
   "config"
-  "dynamic_annotations"
+  "container"
+  "container_common"
+  "container_memory"
+  "cord"
   "core_headers"
-  "malloc_internal"
-  "base_internal"
-  "base"
-  "throw_delegate"
-  "pretty_function"
+  "counting_allocator"
+  "debugging"
+  "debugging_internal"
+  "demangle_internal"
+  "dynamic_annotations"
   "endian"
-  "bits"
+  "examine_stack"
   "exponential_biased"
-  "periodic_sampler"
-  "scoped_set_env"
-  "type_traits"
+  "failure_signal_handler"
+  "fixed_array"
+  "flat_hash_map"
+  "flat_hash_set"
+  "function_ref"
+  "graphcycles_internal"
+  "hash"
+  "hash_function_defaults"
+  "hash_policy_traits"
+  "hashtable_debug"
+  "hashtable_debug_hooks"
+  "hashtablez_sampler"
+  "inlined_vector"
+  "inlined_vector_internal"
+  "int128"
+  "kernel_timeout_internal"
+  "layout"
+  "leak_check"
+  "log_severity"
+  "malloc_internal"
+  "memory"
   "meta"
-  "random_random"
+  "node_hash_map"
+  "node_hash_set"
+  "node_slot_policy"
+  "numeric"
+  "optional"
+  "periodic_sampler"
+  "pow10_helper"
+  "pretty_function"
   "random_bit_gen_ref"
   "random_distributions"
-  "random_seed_gen_exception"
-  "random_seed_sequences"
-  "random_internal_traits"
   "random_internal_distribution_caller"
   "random_internal_distributions"
-  "random_internal_fast_uniform_bits"
-  "random_internal_seed_material"
-  "random_internal_pool_urbg"
   "random_internal_explicit_seed_seq"
-  "random_internal_sequence_urbg"
-  "random_internal_salted_seed_seq"
-  "random_internal_iostream_state_saver"
-  "random_internal_generate_real"
-  "random_internal_wide_multiply"
   "random_internal_fastmath"
+  "random_internal_fast_uniform_bits"
+  "random_internal_generate_real"
+  "random_internal_iostream_state_saver"
   "random_internal_nonsecure_base"
   "random_internal_pcg_engine"
-  "random_internal_randen_engine"
   "random_internal_platform"
+  "random_internal_pool_urbg"
   "random_internal_randen"
-  "random_internal_randen_slow"
+  "random_internal_randen_engine"
   "random_internal_randen_hwaes"
   "random_internal_randen_hwaes_impl"
+  "random_internal_randen_slow"
+  "random_internal_salted_seed_seq"
+  "random_internal_seed_material"
+  "random_internal_sequence_urbg"
+  "random_internal_traits"
   "random_internal_uniform_helper"
+  "random_internal_wide_multiply"
+  "random_random"
+  "random_seed_gen_exception"
+  "random_seed_sequences"
+  "raw_hash_map"
+  "raw_hash_set"
+  "raw_logging_internal"
+  "sample_recorder"
+  "scoped_set_env"
+  "span"
+  "spinlock_wait"
+  "spy_hash_state"
+  "stack_consumption"
+  "stacktrace"
   "status"
+  "str_format"
+  "str_format_internal"
+  "strings"
+  "strings_internal"
+  "symbolize"
+  "synchronization"
+  "thread_pool"
+  "throw_delegate"
   "time"
-  "civil_time"
   "time_zone"
-  "container"
-  "btree"
-  "compressed_tuple"
-  "fixed_array"
-  "inlined_vector_internal"
-  "inlined_vector"
-  "counting_allocator"
-  "flat_hash_map"
-  "flat_hash_set"
-  "node_hash_map"
-  "node_hash_set"
-  "container_memory"
-  "hash_function_defaults"
-  "hash_policy_traits"
-  "hashtablez_sampler"
-  "hashtable_debug"
-  "hashtable_debug_hooks"
-  "have_sse"
-  "node_hash_policy"
-  "raw_hash_map"
-  "container_common"
-  "raw_hash_set"
-  "layout"
   "tracked"
-  "sample_recorder"
+  "type_traits"
+  "utility"
+  "variant"
 )
 
+function(_absl_target_compile_features_if_available TARGET TYPE FEATURE)
+  if(FEATURE IN_LIST CMAKE_CXX_COMPILE_FEATURES)
+    target_compile_features(${TARGET} ${TYPE} ${FEATURE})
+  else()
+    message(WARNING "Feature ${FEATURE} is unknown for the CXX compiler")
+  endif()
+endfunction()
+
+include(CheckCXXSourceCompiles)
+
+check_cxx_source_compiles(
+  [==[
+#ifdef _MSC_VER
+#  if _MSVC_LANG < 201700L
+#    error "The compiler defaults or is configured for C++ < 17"
+#  endif
+#elif __cplusplus < 201700L
+#  error "The compiler defaults or is configured for C++ < 17"
+#endif
+int main() { return 0; }
+]==]
+  ABSL_INTERNAL_AT_LEAST_CXX17)
+
+if(ABSL_INTERNAL_AT_LEAST_CXX17)
+  set(ABSL_INTERNAL_CXX_STD_FEATURE cxx_std_17)
+else()
+  set(ABSL_INTERNAL_CXX_STD_FEATURE cxx_std_14)
+endif()
+
 function(absl_internal_dll_contains)
   cmake_parse_arguments(ABSL_INTERNAL_DLL
     ""
@@ -538,7 +580,27 @@ function(absl_make_dll)
       NOMINMAX
     INTERFACE
       ${ABSL_CC_LIB_DEFINES}
+      ABSL_CONSUME_DLL
   )
+
+  if(ABSL_PROPAGATE_CXX_STD)
+    # Abseil libraries require C++14 as the current minimum standard. When
+    # compiled with C++17 (either because it is the compiler's default or
+    # explicitly requested), then Abseil requires C++17.
+    _absl_target_compile_features_if_available(${_NAME} PUBLIC ${ABSL_INTERNAL_CXX_STD_FEATURE})
+  else()
+    # Note: This is legacy (before CMake 3.8) behavior. Setting the
+    # target-level CXX_STANDARD property to ABSL_CXX_STANDARD (which is
+    # initialized by CMAKE_CXX_STANDARD) should have no real effect, since
+    # that is the default value anyway.
+    #
+    # CXX_STANDARD_REQUIRED does guard against the top-level CMake project
+    # not having enabled CMAKE_CXX_STANDARD_REQUIRED (which prevents
+    # "decaying" to an older standard if the requested one isn't available).
+    set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
+    set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
+  endif()
+
   install(TARGETS abseil_dll EXPORT ${PROJECT_NAME}Targets
         RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
diff --git a/third_party/abseil-cpp/CMake/AbseilHelpers.cmake b/third_party/abseil-cpp/CMake/AbseilHelpers.cmake
index f2ce567511..8e08d3fc8d 100644
--- a/third_party/abseil-cpp/CMake/AbseilHelpers.cmake
+++ b/third_party/abseil-cpp/CMake/AbseilHelpers.cmake
@@ -26,6 +26,12 @@ if(NOT DEFINED ABSL_IDE_FOLDER)
   set(ABSL_IDE_FOLDER Abseil)
 endif()
 
+if(ABSL_USE_SYSTEM_INCLUDES)
+  set(ABSL_INTERNAL_INCLUDE_WARNING_GUARD SYSTEM)
+else()
+  set(ABSL_INTERNAL_INCLUDE_WARNING_GUARD "")
+endif()
+
 # absl_cc_library()
 #
 # CMake function to imitate Bazel's cc_library rule.
@@ -40,7 +46,8 @@ endif()
 # LINKOPTS: List of link options
 # PUBLIC: Add this so that this library will be exported under absl::
 # Also in IDE, target will appear in Abseil folder while non PUBLIC will be in Abseil/internal.
-# TESTONLY: When added, this target will only be built if BUILD_TESTING=ON.
+# TESTONLY: When added, this target will only be built if both
+#           BUILD_TESTING=ON and ABSL_BUILD_TESTING=ON.
 #
 # Note:
 # By default, absl_cc_library will always create a library named absl_${NAME},
@@ -82,7 +89,9 @@ function(absl_cc_library)
     ${ARGN}
   )
 
-  if(ABSL_CC_LIB_TESTONLY AND NOT BUILD_TESTING)
+  if(ABSL_CC_LIB_TESTONLY AND
+      NOT ((BUILD_TESTING AND ABSL_BUILD_TESTING) OR
+        (ABSL_BUILD_TEST_HELPERS AND ABSL_CC_LIB_PUBLIC)))
     return()
   endif()
 
@@ -164,10 +173,14 @@ function(absl_cc_library)
           set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
         elseif(${cflag} MATCHES "^(-W|/w[1234eo])")
           # Don't impose our warnings on others.
+        elseif(${cflag} MATCHES "^-m")
+          # Don't impose CPU instruction requirements on others, as
+          # the code performs feature detection on runtime.
         else()
           set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
         endif()
       endforeach()
+      string(REPLACE ";" " " PC_LINKOPTS "${ABSL_CC_LIB_LINKOPTS}")
       FILE(GENERATE OUTPUT "${CMAKE_BINARY_DIR}/lib/pkgconfig/absl_${_NAME}.pc" CONTENT "\
 prefix=${CMAKE_INSTALL_PREFIX}\n\
 exec_prefix=\${prefix}\n\
@@ -179,7 +192,7 @@ Description: Abseil ${_NAME} library\n\
 URL: https://abseil.io/\n\
 Version: ${PC_VERSION}\n\
 Requires:${PC_DEPS}\n\
-Libs: -L\${libdir} $<JOIN:${ABSL_CC_LIB_LINKOPTS}, > $<$<NOT:$<BOOL:${ABSL_CC_LIB_IS_INTERFACE}>>:-labsl_${_NAME}>\n\
+Libs: -L\${libdir} ${PC_LINKOPTS} $<$<NOT:$<BOOL:${ABSL_CC_LIB_IS_INTERFACE}>>:-labsl_${_NAME}>\n\
 Cflags: -I\${includedir}${PC_CFLAGS}\n")
       INSTALL(FILES "${CMAKE_BINARY_DIR}/lib/pkgconfig/absl_${_NAME}.pc"
               DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
@@ -236,7 +249,7 @@ Cflags: -I\${includedir}${PC_CFLAGS}\n")
     # unconditionally.
     set_property(TARGET ${_NAME} PROPERTY LINKER_LANGUAGE "CXX")
 
-    target_include_directories(${_NAME}
+    target_include_directories(${_NAME} ${ABSL_INTERNAL_INCLUDE_WARNING_GUARD}
       PUBLIC
         "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
@@ -255,10 +268,10 @@ Cflags: -I\${includedir}${PC_CFLAGS}\n")
     endif()
 
     if(ABSL_PROPAGATE_CXX_STD)
-      # Abseil libraries require C++11 as the current minimum standard.
-      # Top-level application CMake projects should ensure a consistent C++
-      # standard for all compiled sources by setting CMAKE_CXX_STANDARD.
-      target_compile_features(${_NAME} PUBLIC cxx_std_11)
+      # Abseil libraries require C++14 as the current minimum standard. When
+      # compiled with C++17 (either because it is the compiler's default or
+      # explicitly requested), then Abseil requires C++17.
+      _absl_target_compile_features_if_available(${_NAME} PUBLIC ${ABSL_INTERNAL_CXX_STD_FEATURE})
     else()
       # Note: This is legacy (before CMake 3.8) behavior. Setting the
       # target-level CXX_STANDARD property to ABSL_CXX_STANDARD (which is
@@ -278,13 +291,13 @@ Cflags: -I\${includedir}${PC_CFLAGS}\n")
     if(ABSL_ENABLE_INSTALL)
       set_target_properties(${_NAME} PROPERTIES
         OUTPUT_NAME "absl_${_NAME}"
-        SOVERSION "2111.0.0"
+        SOVERSION 0
       )
     endif()
   else()
     # Generating header-only library
     add_library(${_NAME} INTERFACE)
-    target_include_directories(${_NAME}
+    target_include_directories(${_NAME} ${ABSL_INTERNAL_INCLUDE_WARNING_GUARD}
       INTERFACE
         "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
@@ -303,10 +316,10 @@ Cflags: -I\${includedir}${PC_CFLAGS}\n")
     target_compile_definitions(${_NAME} INTERFACE ${ABSL_CC_LIB_DEFINES})
 
     if(ABSL_PROPAGATE_CXX_STD)
-      # Abseil libraries require C++11 as the current minimum standard.
+      # Abseil libraries require C++14 as the current minimum standard.
       # Top-level application CMake projects should ensure a consistent C++
       # standard for all compiled sources by setting CMAKE_CXX_STANDARD.
-      target_compile_features(${_NAME} INTERFACE cxx_std_11)
+      _absl_target_compile_features_if_available(${_NAME} INTERFACE ${ABSL_INTERNAL_CXX_STD_FEATURE})
 
       # (INTERFACE libraries can't have the CXX_STANDARD property set, so there
       # is no legacy behavior else case).
@@ -364,7 +377,7 @@ endfunction()
 #     GTest::gtest_main
 # )
 function(absl_cc_test)
-  if(NOT BUILD_TESTING)
+  if(NOT (BUILD_TESTING AND ABSL_BUILD_TESTING))
     return()
   endif()
 
@@ -415,10 +428,10 @@ function(absl_cc_test)
   set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)
 
   if(ABSL_PROPAGATE_CXX_STD)
-    # Abseil libraries require C++11 as the current minimum standard.
+    # Abseil libraries require C++14 as the current minimum standard.
     # Top-level application CMake projects should ensure a consistent C++
     # standard for all compiled sources by setting CMAKE_CXX_STANDARD.
-    target_compile_features(${_NAME} PUBLIC cxx_std_11)
+    _absl_target_compile_features_if_available(${_NAME} PUBLIC ${ABSL_INTERNAL_CXX_STD_FEATURE})
   else()
     # Note: This is legacy (before CMake 3.8) behavior. Setting the
     # target-level CXX_STANDARD property to ABSL_CXX_STANDARD (which is
@@ -434,11 +447,3 @@ function(absl_cc_test)
 
   add_test(NAME ${_NAME} COMMAND ${_NAME})
 endfunction()
-
-
-function(check_target my_target)
-  if(NOT TARGET ${my_target})
-    message(FATAL_ERROR " ABSL: compiling absl requires a ${my_target} CMake target in your project,
-                   see CMake/README.md for more details")
-  endif(NOT TARGET ${my_target})
-endfunction()
diff --git a/third_party/abseil-cpp/CMake/Googletest/CMakeLists.txt.in b/third_party/abseil-cpp/CMake/Googletest/CMakeLists.txt.in
index 5769e3a97b..75691b1117 100644
--- a/third_party/abseil-cpp/CMake/Googletest/CMakeLists.txt.in
+++ b/third_party/abseil-cpp/CMake/Googletest/CMakeLists.txt.in
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.2)
+cmake_minimum_required(VERSION 3.10)
 
 project(googletest-external NONE)
 
diff --git a/third_party/abseil-cpp/CMake/README.md b/third_party/abseil-cpp/CMake/README.md
index f8b27e63f6..19fb327cfe 100644
--- a/third_party/abseil-cpp/CMake/README.md
+++ b/third_party/abseil-cpp/CMake/README.md
@@ -20,8 +20,10 @@ googletest framework
 ### Step-by-Step Instructions
 
 1. If you want to build the Abseil tests, integrate the Abseil dependency
-[Google Test](https://github.com/google/googletest) into your CMake project. To disable Abseil tests, you have to pass
-`-DBUILD_TESTING=OFF` when configuring your project with CMake.
+[Google Test](https://github.com/google/googletest) into your CMake
+project. To disable Abseil tests, you have to pass either
+`-DBUILD_TESTING=OFF` or `-DABSL_BUILD_TESTING=OFF` when configuring your
+project with CMake.
 
 2. Download Abseil and copy it into a subdirectory in your CMake project or add
 Abseil as a [git submodule](https://git-scm.com/docs/git-submodule) in your
@@ -37,12 +39,12 @@ section of your executable or of your library.<br>
 Here is a short CMakeLists.txt example of an application project using Abseil.
 
 ```cmake
-cmake_minimum_required(VERSION 3.8.2)
+cmake_minimum_required(VERSION 3.10)
 project(my_app_project)
 
 # Pick the C++ standard to compile with.
-# Abseil currently supports C++11, C++14, and C++17.
-set(CMAKE_CXX_STANDARD 11)
+# Abseil currently supports C++14, C++17, and C++20.
+set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 add_subdirectory(abseil-cpp)
@@ -60,7 +62,7 @@ will control Abseil library targets) is set to at least that minimum. For
 example:
 
 ```cmake
-cmake_minimum_required(VERSION 3.8.2)
+cmake_minimum_required(VERSION 3.10)
 project(my_lib_project)
 
 # Leave C++ standard up to the root application, so set it only if this is the
@@ -91,7 +93,8 @@ setting a consistent `CMAKE_CXX_STANDARD` that is sufficiently high.
 
 ### Running Abseil Tests with CMake
 
-Use the `-DBUILD_TESTING=ON` flag to run Abseil tests.
+Use the `-DABSL_BUILD_TESTING=ON` flag to run Abseil tests.  Note that
+BUILD_TESTING must also be on (the default).
 
 You will need to provide Abseil with a Googletest dependency.  There are two
 options for how to do this:
@@ -109,7 +112,7 @@ For example, to run just the Abseil tests, you could use this script:
 cd path/to/abseil-cpp
 mkdir build
 cd build
-cmake -DBUILD_TESTING=ON -DABSL_USE_GOOGLETEST_HEAD=ON ..
+cmake -DABSL_BUILD_TESTING=ON -DABSL_USE_GOOGLETEST_HEAD=ON ..
 make -j
 ctest
 ```
@@ -175,7 +178,7 @@ cmake --build /temporary/build/abseil-cpp --target install
 
 ## Google Test Options
 
-`-DBUILD_TESTING=ON` must be set to enable testing
+`-DABSL_BUILD_TESTING=ON` must be set to enable testing
 
 - Have Abseil download and build Google Test for you: `-DABSL_USE_EXTERNAL_GOOGLETEST=OFF` (default)
   - Download and build latest Google Test: `-DABSL_USE_GOOGLETEST_HEAD=ON`
diff --git a/third_party/abseil-cpp/CMake/install_test_project/CMakeLists.txt b/third_party/abseil-cpp/CMake/install_test_project/CMakeLists.txt
index b865b2ec50..30c23b2c6b 100644
--- a/third_party/abseil-cpp/CMake/install_test_project/CMakeLists.txt
+++ b/third_party/abseil-cpp/CMake/install_test_project/CMakeLists.txt
@@ -15,7 +15,7 @@
 
 # A simple CMakeLists.txt for testing cmake installation
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 project(absl_cmake_testing CXX)
 
 add_executable(simple simple.cc)
diff --git a/third_party/abseil-cpp/CMake/install_test_project/test.sh b/third_party/abseil-cpp/CMake/install_test_project/test.sh
index 5a78c92cd1..cc028bac86 100755
--- a/third_party/abseil-cpp/CMake/install_test_project/test.sh
+++ b/third_party/abseil-cpp/CMake/install_test_project/test.sh
@@ -55,10 +55,10 @@ cmake "${absl_dir}" \
   -DABSL_USE_EXTERNAL_GOOGLETEST=ON \
   -DABSL_FIND_GOOGLETEST=ON  \
   -DCMAKE_BUILD_TYPE=Release \
-  -DBUILD_TESTING=ON \
+  -DABSL_BUILD_TESTING=ON \
   -DBUILD_SHARED_LIBS="${build_shared_libs}"
 make -j $(nproc)
-ctest -j $(nproc)
+ctest -j $(nproc) --output-on-failure
 make install
 ldconfig
 popd
diff --git a/third_party/abseil-cpp/CMakeLists.txt b/third_party/abseil-cpp/CMakeLists.txt
index 750a47557d..9e10257851 100644
--- a/third_party/abseil-cpp/CMakeLists.txt
+++ b/third_party/abseil-cpp/CMakeLists.txt
@@ -14,12 +14,9 @@
 # limitations under the License.
 #
 
-# Most widely used distributions have cmake 3.5 or greater available as of March
-# 2019.  A notable exception is RHEL-7 (CentOS7).  You can install a current
-# version of CMake by first installing Extra Packages for Enterprise Linux
-# (https://fedoraproject.org/wiki/EPEL#Extra_Packages_for_Enterprise_Linux_.28EPEL.29)
-# and then issuing `yum install cmake3` on the command line.
-cmake_minimum_required(VERSION 3.5)
+# https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md
+# As of 2022-09-06, CMake 3.10 is the minimum supported version.
+cmake_minimum_required(VERSION 3.10)
 
 # Compiler id for Apple Clang is now AppleClang.
 if (POLICY CMP0025)
@@ -46,11 +43,12 @@ if (POLICY CMP0091)
   cmake_policy(SET CMP0091 NEW)
 endif (POLICY CMP0091)
 
-# Set BUILD_TESTING to OFF by default.
-# This must come before the project() and include(CTest) lines.
-OPTION(BUILD_TESTING "Build tests" OFF)
+# try_compile() honors the CMAKE_CXX_STANDARD value
+if (POLICY CMP0067)
+  cmake_policy(SET CMP0067 NEW)
+endif (POLICY CMP0067)
 
-project(absl LANGUAGES CXX VERSION 20211102)
+project(absl LANGUAGES CXX)
 include(CTest)
 
 # Output directory is correct by default for most build setups. However, when
@@ -68,12 +66,16 @@ else()
 endif()
 
 option(ABSL_PROPAGATE_CXX_STD
-  "Use CMake C++ standard meta features (e.g. cxx_std_11) that propagate to targets that link to Abseil"
+  "Use CMake C++ standard meta features (e.g. cxx_std_14) that propagate to targets that link to Abseil"
   OFF)  # TODO: Default to ON for CMake 3.8 and greater.
 if((${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.8) AND (NOT ABSL_PROPAGATE_CXX_STD))
   message(WARNING "A future Abseil release will default ABSL_PROPAGATE_CXX_STD to ON for CMake 3.8 and up. We recommend enabling this option to ensure your project still builds correctly.")
 endif()
 
+option(ABSL_USE_SYSTEM_INCLUDES
+  "Silence warnings in Abseil headers by marking them as SYSTEM includes"
+  OFF)
+
 list(APPEND CMAKE_MODULE_PATH
   ${CMAKE_CURRENT_LIST_DIR}/CMake
   ${CMAKE_CURRENT_LIST_DIR}/absl/copts
@@ -111,8 +113,15 @@ find_package(Threads REQUIRED)
 
 include(CMakeDependentOption)
 
+option(ABSL_BUILD_TESTING
+  "If ON, Abseil will build all of Abseil's own tests." OFF)
+
+option(ABSL_BUILD_TEST_HELPERS
+  "If ON, Abseil will build libraries that you can use to write tests against Abseil code. This option requires that Abseil is configured to use GoogleTest."
+  OFF)
+
 option(ABSL_USE_EXTERNAL_GOOGLETEST
-  "If ON, Abseil will assume that the targets for GoogleTest are already provided by the including project. This makes sense when Abseil is used with add_subproject." OFF)
+  "If ON, Abseil will assume that the targets for GoogleTest are already provided by the including project. This makes sense when Abseil is used with add_subdirectory." OFF)
 
 cmake_dependent_option(ABSL_FIND_GOOGLETEST
   "If ON, Abseil will use find_package(GTest) rather than assuming that GoogleTest is already provided by the including project."
@@ -130,13 +139,18 @@ set(ABSL_LOCAL_GOOGLETEST_DIR "/usr/src/googletest" CACHE PATH
   "If ABSL_USE_GOOGLETEST_HEAD is OFF and ABSL_GOOGLETEST_URL is not set, specifies the directory of a local GoogleTest checkout."
   )
 
-if(BUILD_TESTING)
-  ## check targets
+if((BUILD_TESTING AND ABSL_BUILD_TESTING) OR ABSL_BUILD_TEST_HELPERS)
   if (ABSL_USE_EXTERNAL_GOOGLETEST)
     if (ABSL_FIND_GOOGLETEST)
       find_package(GTest REQUIRED)
-    else()
-      if (NOT TARGET gtest AND NOT TARGET GTest::gtest)
+    elseif(NOT TARGET GTest::gtest)
+      if(TARGET gtest)
+        # When Google Test is included directly rather than through find_package, the aliases are missing.
+        add_library(GTest::gtest ALIAS gtest)
+        add_library(GTest::gtest_main ALIAS gtest_main)
+        add_library(GTest::gmock ALIAS gmock)
+        add_library(GTest::gmock_main ALIAS gmock_main)
+      else()
         message(FATAL_ERROR "ABSL_USE_EXTERNAL_GOOGLETEST is ON and ABSL_FIND_GOOGLETEST is OFF, which means that the top-level project must build the Google Test project. However, the target gtest was not found.")
       endif()
     endif()
@@ -146,7 +160,7 @@ if(BUILD_TESTING)
       message(FATAL_ERROR "Do not set both ABSL_USE_GOOGLETEST_HEAD and ABSL_GOOGLETEST_DOWNLOAD_URL")
     endif()
     if(ABSL_USE_GOOGLETEST_HEAD)
-      set(absl_gtest_download_url "https://github.com/google/googletest/archive/master.zip")
+      set(absl_gtest_download_url "https://github.com/google/googletest/archive/main.zip")
     elseif(ABSL_GOOGLETEST_DOWNLOAD_URL)
       set(absl_gtest_download_url ${ABSL_GOOGLETEST_DOWNLOAD_URL})
     endif()
@@ -157,25 +171,22 @@ if(BUILD_TESTING)
     endif()
     include(CMake/Googletest/DownloadGTest.cmake)
   endif()
-
-  if (NOT ABSL_FIND_GOOGLETEST)
-    # When Google Test is included directly rather than through find_package, the aliases are missing.
-    add_library(GTest::gtest ALIAS gtest)
-    add_library(GTest::gtest_main ALIAS gtest_main)
-    add_library(GTest::gmock ALIAS gmock)
-    add_library(GTest::gmock_main ALIAS gmock_main)
-  endif()
-
-  check_target(GTest::gtest)
-  check_target(GTest::gtest_main)
-  check_target(GTest::gmock)
-  check_target(GTest::gmock_main)
 endif()
 
 add_subdirectory(absl)
 
 if(ABSL_ENABLE_INSTALL)
-  
+  # absl:lts-remove-begin(system installation is supported for LTS releases)
+  # We don't support system-wide installation
+  list(APPEND SYSTEM_INSTALL_DIRS "/usr/local" "/usr" "/opt/" "/opt/local" "c:/Program Files/${PROJECT_NAME}")
+  if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX IN_LIST SYSTEM_INSTALL_DIRS)
+    message(WARNING "\
+  The default and system-level install directories are unsupported except in LTS \
+  releases of Abseil.  Please set CMAKE_INSTALL_PREFIX to install Abseil in your \
+  source or build tree directly.\
+    ")
+  endif()
+  # absl:lts-remove-end
 
   # install as a subdirectory only
   install(EXPORT ${PROJECT_NAME}Targets
@@ -214,4 +225,25 @@ if(ABSL_ENABLE_INSTALL)
       PATTERN "copts" EXCLUDE
       PATTERN "testdata" EXCLUDE
     )
+
+  file(READ "absl/base/options.h" ABSL_INTERNAL_OPTIONS_H_CONTENTS)
+  if (ABSL_INTERNAL_AT_LEAST_CXX17)
+    string(REGEX REPLACE
+      "#define ABSL_OPTION_USE_STD_([^ ]*) 2"
+      "#define ABSL_OPTION_USE_STD_\\1 1"
+      ABSL_INTERNAL_OPTIONS_H_PINNED
+      "${ABSL_INTERNAL_OPTIONS_H_CONTENTS}")
+  else()
+    string(REGEX REPLACE
+      "#define ABSL_OPTION_USE_STD_([^ ]*) 2"
+      "#define ABSL_OPTION_USE_STD_\\1 0"
+      ABSL_INTERNAL_OPTIONS_H_PINNED
+      "${ABSL_INTERNAL_OPTIONS_H_CONTENTS}")
+  endif()
+  file(WRITE "${CMAKE_BINARY_DIR}/options-pinned.h" "${ABSL_INTERNAL_OPTIONS_H_PINNED}")
+
+  install(FILES "${CMAKE_BINARY_DIR}/options-pinned.h"
+         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/absl/base
+         RENAME "options.h")
+
 endif()  # ABSL_ENABLE_INSTALL
diff --git a/third_party/abseil-cpp/DIR_METADATA b/third_party/abseil-cpp/DIR_METADATA
new file mode 100644
index 0000000000..2aaf8e2eed
--- /dev/null
+++ b/third_party/abseil-cpp/DIR_METADATA
@@ -0,0 +1,3 @@
+monorail {
+  component: "Internals>Core"
+}
diff --git a/third_party/abseil-cpp/METADATA b/third_party/abseil-cpp/METADATA
deleted file mode 100644
index a36d767ad7..0000000000
--- a/third_party/abseil-cpp/METADATA
+++ /dev/null
@@ -1,18 +0,0 @@
-name: "extern/abseil-cpp"
-description:
-    "An open-source collection of C++ code designed to augment the C++ standard "
-    "library"
-
-third_party {
-  url {
-    type: HOMEPAGE
-    value: "https://abseil.io"
-  }
-  url {
-    type: GIT
-    value: "https://github.com/abseil/abseil-cpp"
-  }
-  version: "20211102.0"
-  last_upgrade_date { year: 2021 month: 12 day: 21 }
-}
-
diff --git a/third_party/abseil-cpp/MODULE_LICENSE_APACHE2 b/third_party/abseil-cpp/MODULE_LICENSE_APACHE2
deleted file mode 100644
index e69de29bb2..0000000000
--- a/third_party/abseil-cpp/MODULE_LICENSE_APACHE2
+++ /dev/null
diff --git a/third_party/abseil-cpp/NOTICE b/third_party/abseil-cpp/NOTICE
deleted file mode 120000
index 7a694c9699..0000000000
--- a/third_party/abseil-cpp/NOTICE
+++ /dev/null
@@ -1 +0,0 @@
-LICENSE
\ No newline at end of file
diff --git a/third_party/abseil-cpp/OWNERS.webrtc b/third_party/abseil-cpp/OWNERS.webrtc
new file mode 100644
index 0000000000..2827b09bf4
--- /dev/null
+++ b/third_party/abseil-cpp/OWNERS.webrtc
@@ -0,0 +1,2 @@
+danilchap@chromium.org
+mbonadei@chromium.org
diff --git a/third_party/abseil-cpp/README.chromium b/third_party/abseil-cpp/README.chromium
new file mode 100644
index 0000000000..4f5341b061
--- /dev/null
+++ b/third_party/abseil-cpp/README.chromium
@@ -0,0 +1,37 @@
+Name: Abseil
+Short Name: absl
+URL: https://github.com/abseil/abseil-cpp
+License: Apache 2.0
+License File: LICENSE
+Version: 0
+Revision: 0064d9db90d32d35e9f9d70e2df4ddf8d0ab1257
+Security Critical: yes
+
+Description:
+This directory contains the source code of Abseil for C++. This can be used by
+Chromium, subject to the guidance at
+https://chromium.googlesource.com/chromium/src/+/main/styleguide/c++/c++-features.md;
+it can be used without restriction by Chromium's dependencies, except that
+objects compiled into Chromium itself cannot use anything relying on
+absl::base_internal::FastTypeId (see https://crbug.com/1096380).
+
+How to update Abseil:
+
+1. Download the code from the Abseil git repository (see URL).
+
+2. Copy the content of the Abseil git repo to //third_party/abseil-cpp.
+
+3. From your source root run third_party/abseil-cpp/generate_def_files.py to
+   regenerate Windows symbol definition files.
+
+Local Modifications:
+
+* absl/copts.bzl has been translated to //third_party/absl-cpp/BUILD.gn. Both
+  files contain lists of compiler flags in order to reduce duplication.
+
+* All the BUILD.bazel files have been translated to BUILD.gn files.
+
+* Patches from //third_party/abseil-cpp/patches have been applied.
+
+* Increment this number to silence presubmits about modifying files in
+  third_party when regenerating absl .def files: 2
diff --git a/third_party/abseil-cpp/README.md b/third_party/abseil-cpp/README.md
index db3a7b447a..36e9b7c9d6 100644
--- a/third_party/abseil-cpp/README.md
+++ b/third_party/abseil-cpp/README.md
@@ -1,7 +1,7 @@
 # Abseil - C++ Common Libraries
 
 The repository contains the Abseil C++ library code. Abseil is an open-source
-collection of C++ code (compliant to C++11) designed to augment the C++
+collection of C++ code (compliant to C++14) designed to augment the C++
 standard library.
 
 ## Table of Contents
@@ -46,26 +46,28 @@ the Abseil code, running tests, and getting a simple binary working.
 
 [Bazel](https://bazel.build) and [CMake](https://cmake.org/) are the official
 build systems for Abseil.
-
 See the [quickstart](https://abseil.io/docs/cpp/quickstart) for more information
 on building Abseil using the Bazel build system.
-
 If you require CMake support, please check the [CMake build
 instructions](CMake/README.md) and [CMake
 Quickstart](https://abseil.io/docs/cpp/quickstart-cmake).
 
+<a name="support"></a>
 ## Support
 
-Abseil is officially supported on many platforms. See the [Abseil
-platform support
-guide](https://abseil.io/docs/cpp/platforms/platforms) for details on
-supported operating systems, compilers, CPUs, etc.
+Abseil follows Google's [Foundational C++ Support
+Policy](https://opensource.google/documentation/policies/cplusplus-support). See
+[this
+table](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md)
+for a list of currently supported versions compilers, platforms, and build
+tools.
 
+<a name="codemap"></a>
 ## Codemap
 
 Abseil contains the following C++ library components:
 
-* [`base`](absl/base/) Abseil Fundamentals
+* [`base`](absl/base/)
   <br /> The `base` library contains initialization code and other code which
   all other Abseil code depends on. Code within `base` may not depend on any
   other code (other than the C++ standard library).
@@ -81,26 +83,40 @@ Abseil contains the following C++ library components:
 * [`debugging`](absl/debugging/)
   <br /> The `debugging` library contains code useful for enabling leak
   checks, and stacktrace and symbolization utilities.
+* [`flags`](absl/flags/)
+  <br /> The `flags` library contains code for handling command line flags for
+  libraries and binaries built with Abseil.
 * [`hash`](absl/hash/)
   <br /> The `hash` library contains the hashing framework and default hash
   functor implementations for hashable types in Abseil.
+* [`iterator`](absl/iterator/)
+  <br /> The `iterator` library contains utilities for augmenting ranges in
+  range-based for loops.
+* [`log`](absl/log/)
+  <br /> The `log` library contains `LOG` and `CHECK` macros and facilities
+  for writing logged messages out to disk, `stderr`, or user-extensible
+  destinations.
 * [`memory`](absl/memory/)
-  <br /> The `memory` library contains C++11-compatible versions of
-  `std::make_unique()` and related memory management facilities.
+  <br /> The `memory` library contains memory management facilities that augment
+  C++'s `<memory>` library.
 * [`meta`](absl/meta/)
-  <br /> The `meta` library contains C++11-compatible versions of type checks
+  <br /> The `meta` library contains compatible versions of type checks
   available within C++14 and C++17 versions of the C++ `<type_traits>` library.
 * [`numeric`](absl/numeric/)
-  <br /> The `numeric` library contains C++11-compatible 128-bit integers.
+  <br /> The `numeric` library contains 128-bit integer types as well as
+  implementations of C++20's bitwise math functions.
 * [`profiling`](absl/profiling/)
   <br /> The `profiling` library contains utility code for profiling C++
   entities.  It is currently a private dependency of other Abseil libraries.
+* [`random`](absl/random/)
+  <br /> The `random` library contains functions for generating psuedorandom
+  values.
 * [`status`](absl/status/)
-  <br /> The `status` contains abstractions for error handling, specifically
-  `absl::Status` and `absl::StatusOr<T>`.
+  <br /> The `status` library contains abstractions for error handling,
+  specifically `absl::Status` and `absl::StatusOr<T>`.
 * [`strings`](absl/strings/)
   <br /> The `strings` library contains a variety of strings routines and
-  utilities, including a C++11-compatible version of the C++17
+  utilities, including a C++14-compatible version of the C++17
   `std::string_view` type.
 * [`synchronization`](absl/synchronization/)
   <br /> The `synchronization` library contains concurrency primitives (Abseil's
@@ -112,10 +128,11 @@ Abseil contains the following C++ library components:
   time zones.
 * [`types`](absl/types/)
   <br /> The `types` library contains non-container utility types, like a
-  C++11-compatible version of the C++17 `std::optional` type.
+  C++14-compatible version of the C++17 `std::optional` type.
 * [`utility`](absl/utility/)
   <br /> The `utility` library contains utility and helper code.
 
+<a name="releases"></a>
 ## Releases
 
 Abseil recommends users "live-at-head" (update to the latest commit from the
@@ -125,11 +142,13 @@ Releases](https://github.com/abseil/abseil-cpp/releases) to which we backport
 fixes for severe bugs. See our [release
 management](https://abseil.io/about/releases) document for more details.
 
+<a name="license"></a>
 ## License
 
 The Abseil C++ library is licensed under the terms of the Apache
 license. See [LICENSE](LICENSE) for more information.
 
+<a name="links"></a>
 ## Links
 
 For more information about Abseil:
diff --git a/third_party/abseil-cpp/WORKSPACE b/third_party/abseil-cpp/WORKSPACE
index c9aa8cafa0..072fa93d16 100644
--- a/third_party/abseil-cpp/WORKSPACE
+++ b/third_party/abseil-cpp/WORKSPACE
@@ -20,11 +20,21 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 # GoogleTest/GoogleMock framework. Used by most unit-tests.
 http_archive(
-    name = "com_google_googletest",  # 2021-07-09T13:28:13Z
-    sha256 = "12ef65654dc01ab40f6f33f9d02c04f2097d2cd9fbe48dc6001b29543583b0ad",
-    strip_prefix = "googletest-8d51ffdfab10b3fba636ae69bc03da4b54f8c235",
+    name = "com_google_googletest",  # 2022-06-16T20:18:32Z
+    sha256 = "a1d3123179024258f9c399d45da3e0b09c4aaf8d2c041466ce5b4793a8929f23",
+    strip_prefix = "googletest-86add13493e5c881d7e4ba77fb91c1f57752b3a4",
     # Keep this URL in sync with ABSL_GOOGLETEST_COMMIT in ci/cmake_common.sh.
-    urls = ["https://github.com/google/googletest/archive/8d51ffdfab10b3fba636ae69bc03da4b54f8c235.zip"],
+    urls = ["https://github.com/google/googletest/archive/86add13493e5c881d7e4ba77fb91c1f57752b3a4.zip"],
+)
+
+# RE2 (the regular expression library used by GoogleTest)
+# Note this must use a commit from the `abseil` branch of the RE2 project.
+# https://github.com/google/re2/tree/abseil
+http_archive(
+    name = "com_googlesource_code_re2",
+    sha256 = "0a890c2aa0bb05b2ce906a15efb520d0f5ad4c7d37b8db959c43772802991887",
+    strip_prefix = "re2-a427f10b9fb4622dd6d8643032600aa1b50fbd12",
+    urls = ["https://github.com/google/re2/archive/a427f10b9fb4622dd6d8643032600aa1b50fbd12.zip"],  # 2022-06-09
 )
 
 # Google benchmark.
@@ -35,10 +45,17 @@ http_archive(
     urls = ["https://github.com/google/benchmark/archive/0baacde3618ca617da95375e0af13ce1baadea47.zip"],
 )
 
+# Bazel Skylib.
+http_archive(
+    name = "bazel_skylib",
+    urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/1.2.1/bazel-skylib-1.2.1.tar.gz"],
+    sha256 = "f7be3474d42aae265405a592bb7da8e171919d74c16f082a5457840f06054728",
+)
+
 # Bazel platform rules.
 http_archive(
     name = "platforms",
-    sha256 = "b601beaf841244de5c5a50d2b2eddd34839788000fa1be4260ce6603ca0d8eb7",
-    strip_prefix = "platforms-98939346da932eef0b54cf808622f5bb0928f00b",
-    urls = ["https://github.com/bazelbuild/platforms/archive/98939346da932eef0b54cf808622f5bb0928f00b.zip"],
+    sha256 = "a879ea428c6d56ab0ec18224f976515948822451473a80d06c2e50af0bbe5121",
+    strip_prefix = "platforms-da5541f26b7de1dc8e04c075c99df5351742a4a2",
+    urls = ["https://github.com/bazelbuild/platforms/archive/da5541f26b7de1dc8e04c075c99df5351742a4a2.zip"],  # 2022-05-27
 )
diff --git a/third_party/abseil-cpp/absl.gni b/third_party/abseil-cpp/absl.gni
new file mode 100644
index 0000000000..4c6cd374b9
--- /dev/null
+++ b/third_party/abseil-cpp/absl.gni
@@ -0,0 +1,107 @@
+# Copyright 2020 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file contains the definition of the template absl_source_set which
+# should be the only type of target needed in abseil's BUILD.gn files.
+# This template will correctly set "configs" and "public_configs" in order
+# to correctly compile abseil in Chromium.
+#
+# Usage:
+# Most of the times its usage will be similar to the example below but all
+# the arguments avilable in source_set are also available for absl_source_set.
+#
+#  absl_source_set("foo") {
+#    sources = [ "foo.cc" ]
+#    public = [ "foo.h" ]
+#    deps = [ ":bar" ]
+#  }
+
+import("//build_overrides/build.gni")
+
+template("absl_source_set") {
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    configs -= [ "//build/config/compiler:chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      "//build/config/compiler:prevent_unsafe_narrowing",
+      "//third_party/abseil-cpp:absl_default_cflags_cc",
+      "//third_party/abseil-cpp:absl_define_config",
+    ]
+
+    if (is_component_build) {
+      defines = [ "ABSL_BUILD_DLL" ]
+      if (!is_win) {
+        configs -= [ "//build/config/gcc:symbol_visibility_hidden" ]
+        configs += [ "//build/config/gcc:symbol_visibility_default" ]
+      }
+    }
+
+    if (!defined(public_configs)) {
+      public_configs = []
+    }
+    public_configs += [ "//third_party/abseil-cpp:absl_include_config" ]
+
+    if (!defined(visibility)) {
+      # Within Chromium builds, restrict direct visibility of Abseil sources, so
+      # users must depend on //third_party/abseil-cpp:absl. This prevents use of
+      # banned targets like absl/types:any. A few targets require exceptions.
+      # TODO(crbug.com/1096380): Consider replacing build_with_chromium with
+      # is_component_build for a narrower, more accurate condition.
+      if (build_with_chromium) {
+        visibility = [
+          # Abseil itself.
+          "//third_party/abseil-cpp/*",
+
+          # GTest.  It unconditionally #includes any.h if pretty-print support
+          # for absl types is enabled.
+          "//third_party/googletest/*",
+
+          # WebRTC binary to run PSNR and SSIM video quality analysis. It
+          # statically links absl and it is used by "browser_tests" when
+          # is_component_build=false but it cannot depend on the absl
+          # component because it uses absl/flags.
+          "//third_party/webrtc/rtc_tools:frame_analyzer",
+
+          # WebRTC binaries used by //:chromium_builder_asan. They both
+          # statically link absl (because they depend on absl/flags) and are
+          # used by Chromium only when is_component_build=false.
+          "//third_party/webrtc/rtc_tools:rtp_generator",
+          "//third_party/webrtc/rtc_tools:video_replay",
+
+          # Not used by Chromium directly.
+          "//chromecast/internal/*",
+          "//libassistant/*",
+        ]
+      } else {
+        visibility = [ "*" ]
+      }
+    }
+  }
+}
+
+template("absl_test") {
+  source_set(target_name) {
+    forward_variables_from(invoker, "*")
+    testonly = true
+    configs -= [ "//build/config/compiler:chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      "//third_party/abseil-cpp:absl_default_cflags_cc",
+      "//third_party/abseil-cpp:absl_define_config",
+      "//third_party/abseil-cpp:absl_test_config",
+    ]
+
+    if (!defined(public_configs)) {
+      public_configs = []
+    }
+    public_configs += [ "//third_party/abseil-cpp:absl_include_config" ]
+
+    visibility = [ "//third_party/abseil-cpp/:*" ]
+    deps += [
+      "//third_party/googletest:gmock",
+      "//third_party/googletest:gtest",
+    ]
+  }
+}
diff --git a/third_party/abseil-cpp/absl/BUILD.bazel b/third_party/abseil-cpp/absl/BUILD.bazel
index d799b7fe51..29963ccc19 100644
--- a/third_party/abseil-cpp/absl/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/BUILD.bazel
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+load("@bazel_skylib//lib:selects.bzl", "selects")
+
 package(default_visibility = ["//visibility:public"])
 
 licenses(["notice"])
@@ -26,6 +28,14 @@ config_setting(
 )
 
 config_setting(
+    name = "gcc_compiler",
+    flag_values = {
+        "@bazel_tools//tools/cpp:compiler": "gcc",
+    },
+    visibility = [":__subpackages__"],
+)
+
+config_setting(
     name = "msvc_compiler",
     flag_values = {
         "@bazel_tools//tools/cpp:compiler": "msvc-cl",
@@ -64,7 +74,15 @@ config_setting(
 )
 
 config_setting(
-    name = "wasm",
+    name = "cpu_wasm",
+    values = {
+        "cpu": "wasm",
+    },
+    visibility = [":__subpackages__"],
+)
+
+config_setting(
+    name = "cpu_wasm32",
     values = {
         "cpu": "wasm32",
     },
@@ -72,6 +90,33 @@ config_setting(
 )
 
 config_setting(
+    name = "platforms_wasm32",
+    constraint_values = [
+        "@platforms//cpu:wasm32",
+    ],
+    visibility = [":__subpackages__"],
+)
+
+config_setting(
+    name = "platforms_wasm64",
+    constraint_values = [
+        "@platforms//cpu:wasm64",
+    ],
+    visibility = [":__subpackages__"],
+)
+
+selects.config_setting_group(
+    name = "wasm",
+    match_any = [
+        ":cpu_wasm",
+        ":cpu_wasm32",
+        ":platforms_wasm32",
+        ":platforms_wasm64",
+    ],
+    visibility = [":__subpackages__"],
+)
+
+config_setting(
     name = "fuchsia",
     values = {
         "cpu": "fuchsia",
diff --git a/third_party/abseil-cpp/absl/CMakeLists.txt b/third_party/abseil-cpp/absl/CMakeLists.txt
index b1715846f0..925be19bf0 100644
--- a/third_party/abseil-cpp/absl/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/CMakeLists.txt
@@ -22,6 +22,7 @@ add_subdirectory(debugging)
 add_subdirectory(flags)
 add_subdirectory(functional)
 add_subdirectory(hash)
+add_subdirectory(log)
 add_subdirectory(memory)
 add_subdirectory(meta)
 add_subdirectory(numeric)
diff --git a/third_party/abseil-cpp/absl/algorithm/BUILD.bazel b/third_party/abseil-cpp/absl/algorithm/BUILD.bazel
index afc5263998..3a9ab0136c 100644
--- a/third_party/abseil-cpp/absl/algorithm/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/algorithm/BUILD.bazel
@@ -43,12 +43,14 @@ cc_test(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":algorithm",
+        "//absl/base:config",
         "@com_google_googletest//:gtest_main",
     ],
 )
 
-cc_test(
+cc_binary(
     name = "algorithm_benchmark",
+    testonly = 1,
     srcs = ["equal_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
diff --git a/third_party/abseil-cpp/absl/algorithm/BUILD.gn b/third_party/abseil-cpp/absl/algorithm/BUILD.gn
new file mode 100644
index 0000000000..7e53c03f09
--- /dev/null
+++ b/third_party/abseil-cpp/absl/algorithm/BUILD.gn
@@ -0,0 +1,38 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("algorithm") {
+  public = [ "algorithm.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("container") {
+  public = [ "container.h" ]
+  deps = [
+    ":algorithm",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_test("algorithm_test") {
+  sources = [ "algorithm_test.cc" ]
+  deps = [
+    ":algorithm",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_test("container_test") {
+  sources = [ "container_test.cc" ]
+  deps = [
+    ":container",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/algorithm/CMakeLists.txt b/third_party/abseil-cpp/absl/algorithm/CMakeLists.txt
index 609d858946..181b49ca02 100644
--- a/third_party/abseil-cpp/absl/algorithm/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/algorithm/CMakeLists.txt
@@ -35,6 +35,7 @@ absl_cc_test(
     ${ABSL_TEST_COPTS}
   DEPS
     absl::algorithm
+    absl::config
     GTest::gmock_main
 )
 
diff --git a/third_party/abseil-cpp/absl/algorithm/algorithm_test.cc b/third_party/abseil-cpp/absl/algorithm/algorithm_test.cc
index 81fccb6135..d18df0240f 100644
--- a/third_party/abseil-cpp/absl/algorithm/algorithm_test.cc
+++ b/third_party/abseil-cpp/absl/algorithm/algorithm_test.cc
@@ -20,6 +20,7 @@
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
+#include "absl/base/config.h"
 
 namespace {
 
@@ -50,7 +51,15 @@ TEST(EqualTest, EmptyRange) {
   std::vector<int> empty1;
   std::vector<int> empty2;
 
+  // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105705
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnonnull"
+#endif
   EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), empty1.begin(), empty1.end()));
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic pop
+#endif
   EXPECT_FALSE(absl::equal(empty1.begin(), empty1.end(), v1.begin(), v1.end()));
   EXPECT_TRUE(
       absl::equal(empty1.begin(), empty1.end(), empty2.begin(), empty2.end()));
diff --git a/third_party/abseil-cpp/absl/algorithm/container.h b/third_party/abseil-cpp/absl/algorithm/container.h
index c38a4a63db..26b1952923 100644
--- a/third_party/abseil-cpp/absl/algorithm/container.h
+++ b/third_party/abseil-cpp/absl/algorithm/container.h
@@ -166,7 +166,7 @@ container_algorithm_internal::ContainerDifferenceType<const C> c_distance(
 // c_all_of()
 //
 // Container-based version of the <algorithm> `std::all_of()` function to
-// test a condition on all elements within a container.
+// test if all elements within a container satisfy a condition.
 template <typename C, typename Pred>
 bool c_all_of(const C& c, Pred&& pred) {
   return std::all_of(container_algorithm_internal::c_begin(c),
diff --git a/third_party/abseil-cpp/absl/algorithm/container_test.cc b/third_party/abseil-cpp/absl/algorithm/container_test.cc
index 605afc8040..0fbc7773e8 100644
--- a/third_party/abseil-cpp/absl/algorithm/container_test.cc
+++ b/third_party/abseil-cpp/absl/algorithm/container_test.cc
@@ -67,13 +67,16 @@ bool Equals(int v1, int v2) { return v1 == v2; }
 bool IsOdd(int x) { return x % 2 != 0; }
 
 TEST_F(NonMutatingTest, Distance) {
-  EXPECT_EQ(container_.size(), absl::c_distance(container_));
-  EXPECT_EQ(sequence_.size(), absl::c_distance(sequence_));
-  EXPECT_EQ(vector_.size(), absl::c_distance(vector_));
-  EXPECT_EQ(ABSL_ARRAYSIZE(array_), absl::c_distance(array_));
+  EXPECT_EQ(container_.size(),
+            static_cast<size_t>(absl::c_distance(container_)));
+  EXPECT_EQ(sequence_.size(), static_cast<size_t>(absl::c_distance(sequence_)));
+  EXPECT_EQ(vector_.size(), static_cast<size_t>(absl::c_distance(vector_)));
+  EXPECT_EQ(ABSL_ARRAYSIZE(array_),
+            static_cast<size_t>(absl::c_distance(array_)));
 
   // Works with a temporary argument.
-  EXPECT_EQ(vector_.size(), absl::c_distance(std::vector<int>(vector_)));
+  EXPECT_EQ(vector_.size(),
+            static_cast<size_t>(absl::c_distance(std::vector<int>(vector_))));
 }
 
 TEST_F(NonMutatingTest, Distance_OverloadedBeginEnd) {
diff --git a/third_party/abseil-cpp/absl/algorithm/equal_benchmark.cc b/third_party/abseil-cpp/absl/algorithm/equal_benchmark.cc
index 7bf62c9a7f..948cd65c54 100644
--- a/third_party/abseil-cpp/absl/algorithm/equal_benchmark.cc
+++ b/third_party/abseil-cpp/absl/algorithm/equal_benchmark.cc
@@ -15,8 +15,8 @@
 #include <cstdint>
 #include <cstring>
 
-#include "benchmark/benchmark.h"
 #include "absl/algorithm/algorithm.h"
+#include "benchmark/benchmark.h"
 
 namespace {
 
diff --git a/third_party/abseil-cpp/absl/base/BUILD.bazel b/third_party/abseil-cpp/absl/base/BUILD.bazel
index 4769efda0a..c01765f1de 100644
--- a/third_party/abseil-cpp/absl/base/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/base/BUILD.bazel
@@ -75,6 +75,7 @@ cc_library(
         ":atomic_hook",
         ":config",
         ":core_headers",
+        ":errno_saver",
         ":log_severity",
     ],
 )
@@ -113,10 +114,24 @@ cc_library(
 )
 
 cc_library(
-    name = "dynamic_annotations",
-    srcs = [
-        "internal/dynamic_annotations.h",
+    name = "cycleclock_internal",
+    hdrs = [
+        "internal/cycleclock_config.h",
+        "internal/unscaledcycleclock_config.h",
+    ],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl:__subpackages__",
+    ],
+    deps = [
+        ":base_internal",
+        ":config",
     ],
+)
+
+cc_library(
+    name = "dynamic_annotations",
     hdrs = [
         "dynamic_annotations.h",
     ],
@@ -130,9 +145,6 @@ cc_library(
 
 cc_library(
     name = "core_headers",
-    srcs = [
-        "internal/thread_annotations.h",
-    ],
     hdrs = [
         "attributes.h",
         "const_init.h",
@@ -157,7 +169,9 @@ cc_library(
         "internal/direct_mmap.h",
         "internal/low_level_alloc.h",
     ],
-    copts = ABSL_DEFAULT_COPTS,
+    copts = ABSL_DEFAULT_COPTS + select({
+        "//conditions:default": [],
+    }),
     linkopts = select({
         "//absl:msvc_compiler": [],
         "//absl:clang-cl_compiler": [],
@@ -234,6 +248,7 @@ cc_library(
         ":base_internal",
         ":config",
         ":core_headers",
+        ":cycleclock_internal",
         ":dynamic_annotations",
         ":log_severity",
         ":raw_logging_internal",
@@ -432,6 +447,9 @@ cc_test(
     srcs = ["spinlock_test_common.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":base",
         ":base_internal",
@@ -557,6 +575,7 @@ cc_test(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = [
         "no_test_ios_x86_64",
+        "no_test_wasm",
     ],
     deps = [
         ":malloc_internal",
@@ -570,6 +589,9 @@ cc_test(
     srcs = ["internal/thread_identity_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":base",
         ":core_headers",
@@ -702,6 +724,31 @@ cc_test(
     ],
 )
 
+cc_library(
+    name = "prefetch",
+    hdrs = ["internal/prefetch.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl:__subpackages__",
+    ],
+    deps = [
+        ":config",
+    ],
+)
+
+cc_test(
+    name = "prefetch_test",
+    size = "small",
+    srcs = ["internal/prefetch_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":prefetch",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
 cc_test(
     name = "unique_small_name_test",
     size = "small",
diff --git a/third_party/abseil-cpp/absl/base/BUILD.gn b/third_party/abseil-cpp/absl/base/BUILD.gn
new file mode 100644
index 0000000000..d6cca687ea
--- /dev/null
+++ b/third_party/abseil-cpp/absl/base/BUILD.gn
@@ -0,0 +1,291 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("atomic_hook") {
+  public = [ "internal/atomic_hook.h" ]
+  public_deps = [
+    ":config",
+    ":core_headers",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("errno_saver") {
+  public = [ "internal/errno_saver.h" ]
+  public_deps = [ ":config" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("log_severity") {
+  sources = [ "log_severity.cc" ]
+  public = [ "log_severity.h" ]
+  public_deps = [
+    ":config",
+    ":core_headers",
+  ]
+}
+
+absl_source_set("raw_logging_internal") {
+  sources = [ "internal/raw_logging.cc" ]
+  public = [ "internal/raw_logging.h" ]
+  public_deps = [
+    ":atomic_hook",
+    ":config",
+    ":core_headers",
+    ":errno_saver",
+    ":log_severity",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("spinlock_wait") {
+  sources = [
+    "internal/spinlock_akaros.inc",
+    "internal/spinlock_linux.inc",
+    "internal/spinlock_posix.inc",
+    "internal/spinlock_wait.cc",
+    "internal/spinlock_win32.inc",
+  ]
+  public = [ "internal/spinlock_wait.h" ]
+  deps = [
+    ":base_internal",
+    ":core_headers",
+    ":errno_saver",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/base:*" ]
+}
+
+absl_source_set("config") {
+  public = [
+    "config.h",
+    "options.h",
+    "policy_checks.h",
+  ]
+}
+
+absl_source_set("cycleclock_internal") {
+  public = [
+    "internal/cycleclock_config.h",
+    "internal/unscaledcycleclock_config.h",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+  deps = [
+    ":base_internal",
+    ":config",
+  ]
+}
+
+absl_source_set("dynamic_annotations") {
+  public = [ "dynamic_annotations.h" ]
+
+  # Abseil's dynamic annotations are only visible inside Abseil because
+  # their usage is deprecated in Chromium (see README.chromium for more info).
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+  deps = [
+    ":config",
+    ":core_headers",
+  ]
+}
+
+absl_source_set("core_headers") {
+  public = [
+    "attributes.h",
+    "const_init.h",
+    "macros.h",
+    "optimization.h",
+    "port.h",
+    "thread_annotations.h",
+  ]
+  public_deps = [ ":config" ]
+}
+
+absl_source_set("malloc_internal") {
+  sources = [ "internal/low_level_alloc.cc" ]
+  public = [
+    "internal/direct_mmap.h",
+    "internal/low_level_alloc.h",
+  ]
+  public_deps = [
+    ":base",
+    ":base_internal",
+    ":config",
+    ":core_headers",
+    ":dynamic_annotations",
+    ":raw_logging_internal",
+  ]
+}
+
+absl_source_set("base_internal") {
+  public = [
+    "internal/hide_ptr.h",
+    "internal/identity.h",
+    "internal/inline_variable.h",
+    "internal/invoke.h",
+    "internal/scheduling_mode.h",
+  ]
+  public_deps = [
+    ":config",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("base") {
+  sources = [
+    "internal/cycleclock.cc",
+    "internal/spinlock.cc",
+    "internal/sysinfo.cc",
+    "internal/thread_identity.cc",
+    "internal/unscaledcycleclock.cc",
+  ]
+  public = [
+    "call_once.h",
+    "casts.h",
+    "internal/cycleclock.h",
+    "internal/low_level_scheduling.h",
+    "internal/per_thread_tls.h",
+    "internal/spinlock.h",
+    "internal/sysinfo.h",
+    "internal/thread_identity.h",
+    "internal/tsan_mutex_interface.h",
+    "internal/unscaledcycleclock.h",
+  ]
+
+  # TODO(mbonadei): The bazel file has:
+  #   "-DEFAULTLIB:advapi32.lib"
+  # understand if this is needed here as well.
+  public_deps = [
+    ":atomic_hook",
+    ":base_internal",
+    ":config",
+    ":core_headers",
+    ":cycleclock_internal",
+    ":dynamic_annotations",
+    ":log_severity",
+    ":raw_logging_internal",
+    ":spinlock_wait",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("throw_delegate") {
+  sources = [ "internal/throw_delegate.cc" ]
+  public = [ "internal/throw_delegate.h" ]
+  public_deps = [
+    ":config",
+    ":raw_logging_internal",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("exception_testing") {
+  testonly = true
+  public = [ "internal/exception_testing.h" ]
+  public_deps = [ ":config" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("pretty_function") {
+  public = [ "internal/pretty_function.h" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+# TODO(mbonadei): This target throws by design. We should probably
+# just remove it.
+# source_set("exception_safety_testing") {
+#   testonly = true
+#   configs -= [ "//build/config/compiler:chromium_code" ]
+#   configs += [
+#     "//build/config/compiler:no_chromium_code",
+#     "//third_party/abseil-cpp:absl_test_cflags_cc",
+#   ]
+#   public_configs = [ "//third_party/abseil-cpp:absl_include_config" ]
+#   sources = [
+#     "internal/exception_safety_testing.cc",
+#   ]
+#   public = [
+#     "internal/exception_safety_testing.h",
+#   ]
+#   deps = [
+#     ":config",
+#     ":pretty_function",
+#     "//third_party/abseil-cpp/absl/memory",
+#     "//third_party/abseil-cpp/absl/meta:type_traits",
+#     "//third_party/abseil-cpp/absl/strings",
+#     "//third_party/abseil-cpp/absl/utility",
+#     "//third_party/googletest:gtest",
+#   ]
+# }
+
+absl_source_set("spinlock_test_common") {
+  testonly = true
+  sources = [ "spinlock_test_common.cc" ]
+  deps = [
+    ":base",
+    ":base_internal",
+    ":config",
+    ":core_headers",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("endian") {
+  public = [
+    "internal/endian.h",
+    "internal/unaligned_access.h",
+  ]
+  public_deps = [
+    ":base",
+    ":config",
+    ":core_headers",
+  ]
+}
+
+absl_source_set("scoped_set_env") {
+  testonly = true
+  public = [ "internal/scoped_set_env.h" ]
+  sources = [ "internal/scoped_set_env.cc" ]
+  public_deps = [ ":config" ]
+  deps = [ ":raw_logging_internal" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("strerror") {
+  sources = [ "internal/strerror.cc" ]
+  public = [ "internal/strerror.h" ]
+  public_deps = [ ":config" ]
+  deps = [
+    ":core_headers",
+    ":errno_saver",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("fast_type_id") {
+  public = [ "internal/fast_type_id.h" ]
+  public_deps = [ ":config" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("prefetch") {
+  public = [ "internal/prefetch.h" ]
+  deps = [ ":config" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_test("prefetch_test") {
+  sources = [ "internal/prefetch_test.cc" ]
+  deps = [ ":prefetch" ]
+}
+
+absl_test("config_test") {
+  sources = [ "config_test.cc" ]
+  deps = [
+    ":config",
+    "//third_party/abseil-cpp/absl/synchronization:thread_pool",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/base/CMakeLists.txt b/third_party/abseil-cpp/absl/base/CMakeLists.txt
index c7233cb36c..febc551291 100644
--- a/third_party/abseil-cpp/absl/base/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/base/CMakeLists.txt
@@ -16,6 +16,7 @@
 
 find_library(LIBRT rt)
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     atomic_hook
@@ -28,6 +29,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     errno_saver
@@ -52,6 +54,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     raw_logging_internal
@@ -63,11 +66,13 @@ absl_cc_library(
     absl::atomic_hook
     absl::config
     absl::core_headers
+    absl::errno_saver
     absl::log_severity
   COPTS
     ${ABSL_DEFAULT_COPTS}
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     spinlock_wait
@@ -104,8 +109,6 @@ absl_cc_library(
     dynamic_annotations
   HDRS
     "dynamic_annotations.h"
-  SRCS
-    "internal/dynamic_annotations.h"
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
@@ -123,7 +126,6 @@ absl_cc_library(
     "optimization.h"
     "port.h"
     "thread_annotations.h"
-    "internal/thread_annotations.h"
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
@@ -131,6 +133,7 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     malloc_internal
@@ -151,6 +154,7 @@ absl_cc_library(
     Threads::Threads
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     base_internal
@@ -174,6 +178,7 @@ absl_cc_library(
     "call_once.h"
     "casts.h"
     "internal/cycleclock.h"
+    "internal/cycleclock_config.h"
     "internal/low_level_scheduling.h"
     "internal/per_thread_tls.h"
     "internal/spinlock.h"
@@ -181,6 +186,7 @@ absl_cc_library(
     "internal/thread_identity.h"
     "internal/tsan_mutex_interface.h"
     "internal/unscaledcycleclock.h"
+    "internal/unscaledcycleclock_config.h"
   SRCS
     "internal/cycleclock.cc"
     "internal/spinlock.cc"
@@ -192,7 +198,7 @@ absl_cc_library(
   LINKOPTS
     ${ABSL_DEFAULT_LINKOPTS}
     $<$<BOOL:${LIBRT}>:-lrt>
-    $<$<BOOL:${MINGW}>:"advapi32">
+    $<$<BOOL:${MINGW}>:-ladvapi32>
   DEPS
     absl::atomic_hook
     absl::base_internal
@@ -207,6 +213,7 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     throw_delegate
@@ -221,6 +228,7 @@ absl_cc_library(
     absl::raw_logging_internal
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     exception_testing
@@ -234,6 +242,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     pretty_function
@@ -243,6 +252,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     exception_safety_testing
@@ -276,6 +286,7 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     atomic_hook_test_helper
@@ -375,6 +386,7 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     spinlock_test_common
@@ -409,6 +421,7 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     endian
@@ -519,6 +532,7 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     scoped_set_env
@@ -570,6 +584,7 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     strerror
@@ -601,6 +616,7 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     fast_type_id
@@ -626,6 +642,32 @@ absl_cc_test(
     GTest::gtest_main
 )
 
+# Internal-only target, do not depend on directly.
+absl_cc_library(
+  NAME
+    prefetch
+  HDRS
+    "internal/prefetch.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+)
+
+absl_cc_test(
+  NAME
+    prefetch_test
+  SRCS
+    "internal/prefetch_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  DEPS
+    absl::prefetch
+    GTest::gtest_main
+)
+
 absl_cc_test(
   NAME
     optimization_test
diff --git a/third_party/abseil-cpp/absl/base/attributes.h b/third_party/abseil-cpp/absl/base/attributes.h
index e3907827d6..e11a064add 100644
--- a/third_party/abseil-cpp/absl/base/attributes.h
+++ b/third_party/abseil-cpp/absl/base/attributes.h
@@ -136,9 +136,10 @@
 // for further information.
 // The MinGW compiler doesn't complain about the weak attribute until the link
 // step, presumably because Windows doesn't use ELF binaries.
-#if (ABSL_HAVE_ATTRIBUTE(weak) ||                   \
-     (defined(__GNUC__) && !defined(__clang__))) && \
-    (!defined(_WIN32) || __clang_major__ < 9) && !defined(__MINGW32__)
+#if (ABSL_HAVE_ATTRIBUTE(weak) ||                                         \
+     (defined(__GNUC__) && !defined(__clang__))) &&                       \
+    (!defined(_WIN32) || (defined(__clang__) && __clang_major__ >= 9)) && \
+    !defined(__MINGW32__)
 #undef ABSL_ATTRIBUTE_WEAK
 #define ABSL_ATTRIBUTE_WEAK __attribute__((weak))
 #define ABSL_HAVE_ATTRIBUTE_WEAK 1
@@ -212,6 +213,9 @@
 // https://gcc.gnu.org/gcc-4.8/changes.html
 #if ABSL_HAVE_ATTRIBUTE(no_sanitize_address)
 #define ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
+#elif defined(_MSC_VER) && _MSC_VER >= 1928
+// https://docs.microsoft.com/en-us/cpp/cpp/no-sanitize-address
+#define ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS __declspec(no_sanitize_address)
 #else
 #define ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS
 #endif
@@ -311,7 +315,6 @@
   __attribute__((section(#name))) __attribute__((noinline))
 #endif
 
-
 // ABSL_ATTRIBUTE_SECTION_VARIABLE
 //
 // Tells the compiler/linker to put a given variable into a section and define
@@ -338,8 +341,8 @@
 // a no-op on ELF but not on Mach-O.
 //
 #ifndef ABSL_DECLARE_ATTRIBUTE_SECTION_VARS
-#define ABSL_DECLARE_ATTRIBUTE_SECTION_VARS(name) \
-  extern char __start_##name[] ABSL_ATTRIBUTE_WEAK;    \
+#define ABSL_DECLARE_ATTRIBUTE_SECTION_VARS(name)   \
+  extern char __start_##name[] ABSL_ATTRIBUTE_WEAK; \
   extern char __stop_##name[] ABSL_ATTRIBUTE_WEAK
 #endif
 #ifndef ABSL_DEFINE_ATTRIBUTE_SECTION_VARS
@@ -400,6 +403,9 @@
 //
 // Tells the compiler to warn about unused results.
 //
+// For code or headers that are assured to only build with C++17 and up, prefer
+// just using the standard `[[nodiscard]]` directly over this macro.
+//
 // When annotating a function, it must appear as the first part of the
 // declaration or definition. The compiler will warn if the return value from
 // such a function is unused:
@@ -426,9 +432,10 @@
 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425
 //
 // Note: past advice was to place the macro after the argument list.
-#if ABSL_HAVE_ATTRIBUTE(nodiscard)
-#define ABSL_MUST_USE_RESULT [[nodiscard]]
-#elif defined(__clang__) && ABSL_HAVE_ATTRIBUTE(warn_unused_result)
+//
+// TODO(b/176172494): Use ABSL_HAVE_CPP_ATTRIBUTE(nodiscard) when all code is
+// compliant with the stricter [[nodiscard]].
+#if defined(__clang__) && ABSL_HAVE_ATTRIBUTE(warn_unused_result)
 #define ABSL_MUST_USE_RESULT __attribute__((warn_unused_result))
 #else
 #define ABSL_MUST_USE_RESULT
@@ -498,7 +505,7 @@
 #define ABSL_XRAY_NEVER_INSTRUMENT [[clang::xray_never_instrument]]
 #if ABSL_HAVE_CPP_ATTRIBUTE(clang::xray_log_args)
 #define ABSL_XRAY_LOG_ARGS(N) \
-    [[clang::xray_always_instrument, clang::xray_log_args(N)]]
+  [[clang::xray_always_instrument, clang::xray_log_args(N)]]
 #else
 #define ABSL_XRAY_LOG_ARGS(N) [[clang::xray_always_instrument]]
 #endif
@@ -642,6 +649,9 @@
 // declarations. The macro argument is used as a custom diagnostic message (e.g.
 // suggestion of a better alternative).
 //
+// For code or headers that are assured to only build with C++14 and up, prefer
+// just using the standard `[[deprecated("message")]]` directly over this macro.
+//
 // Examples:
 //
 //   class ABSL_DEPRECATED("Use Bar instead") Foo {...};
@@ -652,14 +662,17 @@
 //   ABSL_DEPRECATED("Use DoThat() instead")
 //   void DoThis();
 //
+//   enum FooEnum {
+//     kBar ABSL_DEPRECATED("Use kBaz instead"),
+//   };
+//
 // Every usage of a deprecated entity will trigger a warning when compiled with
-// clang's `-Wdeprecated-declarations` option. This option is turned off by
-// default, but the warnings will be reported by clang-tidy.
-#if defined(__clang__) && defined(__cplusplus) && __cplusplus >= 201103L
+// GCC/Clang's `-Wdeprecated-declarations` option. Google's production toolchain
+// turns this warning off by default, instead relying on clang-tidy to report
+// new uses of deprecated code.
+#if ABSL_HAVE_ATTRIBUTE(deprecated)
 #define ABSL_DEPRECATED(message) __attribute__((deprecated(message)))
-#endif
-
-#ifndef ABSL_DEPRECATED
+#else
 #define ABSL_DEPRECATED(message)
 #endif
 
@@ -669,9 +682,18 @@
 // not compile (on supported platforms) unless the variable has a constant
 // initializer. This is useful for variables with static and thread storage
 // duration, because it guarantees that they will not suffer from the so-called
-// "static init order fiasco".  Prefer to put this attribute on the most visible
-// declaration of the variable, if there's more than one, because code that
-// accesses the variable can then use the attribute for optimization.
+// "static init order fiasco".
+//
+// This attribute must be placed on the initializing declaration of the
+// variable. Some compilers will give a -Wmissing-constinit warning when this
+// attribute is placed on some other declaration but missing from the
+// initializing declaration.
+//
+// In some cases (notably with thread_local variables), `ABSL_CONST_INIT` can
+// also be used in a non-initializing declaration to tell the compiler that a
+// variable is already initialized, reducing overhead that would otherwise be
+// incurred by a hidden guard variable. Thus annotating all declarations with
+// this attribute is recommended to potentially enhance optimization.
 //
 // Example:
 //
@@ -680,14 +702,19 @@
 //     ABSL_CONST_INIT static MyType my_var;
 //   };
 //
-//   MyType MyClass::my_var = MakeMyType(...);
+//   ABSL_CONST_INIT MyType MyClass::my_var = MakeMyType(...);
+//
+// For code or headers that are assured to only build with C++20 and up, prefer
+// just using the standard `constinit` keyword directly over this macro.
 //
 // Note that this attribute is redundant if the variable is declared constexpr.
-#if ABSL_HAVE_CPP_ATTRIBUTE(clang::require_constant_initialization)
+#if defined(__cpp_constinit) && __cpp_constinit >= 201907L
+#define ABSL_CONST_INIT constinit
+#elif ABSL_HAVE_CPP_ATTRIBUTE(clang::require_constant_initialization)
 #define ABSL_CONST_INIT [[clang::require_constant_initialization]]
 #else
 #define ABSL_CONST_INIT
-#endif  // ABSL_HAVE_CPP_ATTRIBUTE(clang::require_constant_initialization)
+#endif
 
 // ABSL_ATTRIBUTE_PURE_FUNCTION
 //
@@ -732,4 +759,41 @@
 #define ABSL_ATTRIBUTE_LIFETIME_BOUND
 #endif
 
+// ABSL_ATTRIBUTE_TRIVIAL_ABI
+// Indicates that a type is "trivially relocatable" -- meaning it can be
+// relocated without invoking the constructor/destructor, using a form of move
+// elision.
+//
+// From a memory safety point of view, putting aside destructor ordering, it's
+// safe to apply ABSL_ATTRIBUTE_TRIVIAL_ABI if an object's location
+// can change over the course of its lifetime: if a constructor can be run one
+// place, and then the object magically teleports to another place where some
+// methods are run, and then the object teleports to yet another place where it
+// is destroyed. This is notably not true for self-referential types, where the
+// move-constructor must keep the self-reference up to date. If the type changed
+// location without invoking the move constructor, it would have a dangling
+// self-reference.
+//
+// The use of this teleporting machinery means that the number of paired
+// move/destroy operations can change, and so it is a bad idea to apply this to
+// a type meant to count the number of moves.
+//
+// Warning: applying this can, rarely, break callers. Objects passed by value
+// will be destroyed at the end of the call, instead of the end of the
+// full-expression containing the call. In addition, it changes the ABI
+// of functions accepting this type by value (e.g. to pass in registers).
+//
+// See also the upstream documentation:
+// https://clang.llvm.org/docs/AttributeReference.html#trivial-abi
+//
+#if ABSL_HAVE_CPP_ATTRIBUTE(clang::trivial_abi)
+#define ABSL_ATTRIBUTE_TRIVIAL_ABI [[clang::trivial_abi]]
+#define ABSL_HAVE_ATTRIBUTE_TRIVIAL_ABI 1
+#elif ABSL_HAVE_ATTRIBUTE(trivial_abi)
+#define ABSL_ATTRIBUTE_TRIVIAL_ABI __attribute__((trivial_abi))
+#define ABSL_HAVE_ATTRIBUTE_TRIVIAL_ABI 1
+#else
+#define ABSL_ATTRIBUTE_TRIVIAL_ABI
+#endif
+
 #endif  // ABSL_BASE_ATTRIBUTES_H_
diff --git a/third_party/abseil-cpp/absl/base/casts.h b/third_party/abseil-cpp/absl/base/casts.h
index 83c691265f..b99adb0699 100644
--- a/third_party/abseil-cpp/absl/base/casts.h
+++ b/third_party/abseil-cpp/absl/base/casts.h
@@ -29,6 +29,10 @@
 #include <type_traits>
 #include <utility>
 
+#if defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806L
+#include <bit>  // For std::bit_cast.
+#endif  // defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806L
+
 #include "absl/base/internal/identity.h"
 #include "absl/base/macros.h"
 #include "absl/meta/type_traits.h"
@@ -36,19 +40,6 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
-namespace internal_casts {
-
-template <class Dest, class Source>
-struct is_bitcastable
-    : std::integral_constant<
-          bool,
-          sizeof(Dest) == sizeof(Source) &&
-              type_traits_internal::is_trivially_copyable<Source>::value &&
-              type_traits_internal::is_trivially_copyable<Dest>::value &&
-              std::is_default_constructible<Dest>::value> {};
-
-}  // namespace internal_casts
-
 // implicit_cast()
 //
 // Performs an implicit conversion between types following the language
@@ -105,81 +96,83 @@ constexpr To implicit_cast(typename absl::internal::identity_t<To> to) {
 
 // bit_cast()
 //
-// Performs a bitwise cast on a type without changing the underlying bit
-// representation of that type's value. The two types must be of the same size
-// and both types must be trivially copyable. As with most casts, use with
-// caution. A `bit_cast()` might be needed when you need to temporarily treat a
-// type as some other type, such as in the following cases:
+// Creates a value of the new type `Dest` whose representation is the same as
+// that of the argument, which is of (deduced) type `Source` (a "bitwise cast";
+// every bit in the value representation of the result is equal to the
+// corresponding bit in the object representation of the source). Source and
+// destination types must be of the same size, and both types must be trivially
+// copyable.
 //
-//    * Serialization (casting temporarily to `char *` for those purposes is
-//      always allowed by the C++ standard)
-//    * Managing the individual bits of a type within mathematical operations
-//      that are not normally accessible through that type
-//    * Casting non-pointer types to pointer types (casting the other way is
-//      allowed by `reinterpret_cast()` but round-trips cannot occur the other
-//      way).
-//
-// Example:
+// As with most casts, use with caution. A `bit_cast()` might be needed when you
+// need to treat a value as the value of some other type, for example, to access
+// the individual bits of an object which are not normally accessible through
+// the object's type, such as for working with the binary representation of a
+// floating point value:
 //
 //   float f = 3.14159265358979;
-//   int i = bit_cast<int32_t>(f);
+//   int i = bit_cast<int>(f);
 //   // i = 0x40490fdb
 //
-// Casting non-pointer types to pointer types and then dereferencing them
-// traditionally produces undefined behavior.
+// Reinterpreting and accessing a value directly as a different type (as shown
+// below) usually results in undefined behavior.
 //
 // Example:
 //
 //   // WRONG
-//   float f = 3.14159265358979;            // WRONG
-//   int i = * reinterpret_cast<int*>(&f);  // WRONG
+//   float f = 3.14159265358979;
+//   int i = reinterpret_cast<int&>(f);    // Wrong
+//   int j = *reinterpret_cast<int*>(&f);  // Equally wrong
+//   int k = *bit_cast<int*>(&f);          // Equally wrong
 //
-// The address-casting method produces undefined behavior according to the ISO
-// C++ specification section [basic.lval]. Roughly, this section says: if an
-// object in memory has one type, and a program accesses it with a different
-// type, the result is undefined behavior for most values of "different type".
+// Reinterpret-casting results in undefined behavior according to the ISO C++
+// specification, section [basic.lval]. Roughly, this section says: if an object
+// in memory has one type, and a program accesses it with a different type, the
+// result is undefined behavior for most "different type".
+//
+// Using bit_cast on a pointer and then dereferencing it is no better than using
+// reinterpret_cast. You should only use bit_cast on the value itself.
 //
 // Such casting results in type punning: holding an object in memory of one type
 // and reading its bits back using a different type. A `bit_cast()` avoids this
-// issue by implementing its casts using `memcpy()`, which avoids introducing
-// this undefined behavior.
-//
-// NOTE: The requirements here are more strict than the bit_cast of standard
-// proposal p0476 due to the need for workarounds and lack of intrinsics.
-// Specifically, this implementation also requires `Dest` to be
-// default-constructible.
-template <
-    typename Dest, typename Source,
-    typename std::enable_if<internal_casts::is_bitcastable<Dest, Source>::value,
-                            int>::type = 0>
+// issue by copying the object representation to a new value, which avoids
+// introducing this undefined behavior (since the original value is never
+// accessed in the wrong way).
+//
+// The requirements of `absl::bit_cast` are more strict than that of
+// `std::bit_cast` unless compiler support is available. Specifically, without
+// compiler support, this implementation also requires `Dest` to be
+// default-constructible. In C++20, `absl::bit_cast` is replaced by
+// `std::bit_cast`.
+#if defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806L
+
+using std::bit_cast;
+
+#else  // defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806L
+
+template <typename Dest, typename Source,
+          typename std::enable_if<
+              sizeof(Dest) == sizeof(Source) &&
+                  type_traits_internal::is_trivially_copyable<Source>::value &&
+                  type_traits_internal::is_trivially_copyable<Dest>::value
+#if !ABSL_HAVE_BUILTIN(__builtin_bit_cast)
+                  && std::is_default_constructible<Dest>::value
+#endif  // !ABSL_HAVE_BUILTIN(__builtin_bit_cast)
+              ,
+              int>::type = 0>
+#if ABSL_HAVE_BUILTIN(__builtin_bit_cast)
+inline constexpr Dest bit_cast(const Source& source) {
+  return __builtin_bit_cast(Dest, source);
+}
+#else  // ABSL_HAVE_BUILTIN(__builtin_bit_cast)
 inline Dest bit_cast(const Source& source) {
   Dest dest;
   memcpy(static_cast<void*>(std::addressof(dest)),
          static_cast<const void*>(std::addressof(source)), sizeof(dest));
   return dest;
 }
+#endif  // ABSL_HAVE_BUILTIN(__builtin_bit_cast)
 
-// NOTE: This overload is only picked if the requirements of bit_cast are
-// not met. It is therefore UB, but is provided temporarily as previous
-// versions of this function template were unchecked. Do not use this in
-// new code.
-template <
-    typename Dest, typename Source,
-    typename std::enable_if<
-        !internal_casts::is_bitcastable<Dest, Source>::value,
-        int>::type = 0>
-ABSL_DEPRECATED(
-    "absl::bit_cast type requirements were violated. Update the types "
-    "being used such that they are the same size and are both "
-    "TriviallyCopyable.")
-inline Dest bit_cast(const Source& source) {
-  static_assert(sizeof(Dest) == sizeof(Source),
-                "Source and destination types should have equal sizes.");
-
-  Dest dest;
-  memcpy(&dest, &source, sizeof(dest));
-  return dest;
-}
+#endif  // defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806L
 
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/base/config.h b/third_party/abseil-cpp/absl/base/config.h
index 585485c359..1058ce74b7 100644
--- a/third_party/abseil-cpp/absl/base/config.h
+++ b/third_party/abseil-cpp/absl/base/config.h
@@ -56,6 +56,25 @@
 #include <cstddef>
 #endif  // __cplusplus
 
+// ABSL_INTERNAL_CPLUSPLUS_LANG
+//
+// MSVC does not set the value of __cplusplus correctly, but instead uses
+// _MSVC_LANG as a stand-in.
+// https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
+//
+// However, there are reports that MSVC even sets _MSVC_LANG incorrectly at
+// times, for example:
+// https://github.com/microsoft/vscode-cpptools/issues/1770
+// https://reviews.llvm.org/D70996
+//
+// For this reason, this symbol is considered INTERNAL and code outside of
+// Abseil must not use it.
+#if defined(_MSVC_LANG)
+#define ABSL_INTERNAL_CPLUSPLUS_LANG _MSVC_LANG
+#elif defined(__cplusplus)
+#define ABSL_INTERNAL_CPLUSPLUS_LANG __cplusplus
+#endif
+
 #if defined(__APPLE__)
 // Included for TARGET_OS_IPHONE, __IPHONE_OS_VERSION_MIN_REQUIRED,
 // __IPHONE_8_0.
@@ -92,8 +111,8 @@
 //
 // LTS releases can be obtained from
 // https://github.com/abseil/abseil-cpp/releases.
-#define ABSL_LTS_RELEASE_VERSION 20211102
-#define ABSL_LTS_RELEASE_PATCH_LEVEL 0
+#undef ABSL_LTS_RELEASE_VERSION
+#undef ABSL_LTS_RELEASE_PATCH_LEVEL
 
 // Helper macro to convert a CPP variable to a string literal.
 #define ABSL_INTERNAL_DO_TOKEN_STR(x) #x
@@ -183,12 +202,6 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #define ABSL_HAVE_BUILTIN(x) 0
 #endif
 
-#if defined(__is_identifier)
-#define ABSL_INTERNAL_HAS_KEYWORD(x) !(__is_identifier(x))
-#else
-#define ABSL_INTERNAL_HAS_KEYWORD(x) 0
-#endif
-
 #ifdef __has_feature
 #define ABSL_HAVE_FEATURE(f) __has_feature(f)
 #else
@@ -212,11 +225,12 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #endif
 
 // ABSL_HAVE_TLS is defined to 1 when __thread should be supported.
-// We assume __thread is supported on Linux when compiled with Clang or compiled
-// against libstdc++ with _GLIBCXX_HAVE_TLS defined.
+// We assume __thread is supported on Linux or Asylo when compiled with Clang or
+// compiled against libstdc++ with _GLIBCXX_HAVE_TLS defined.
 #ifdef ABSL_HAVE_TLS
 #error ABSL_HAVE_TLS cannot be directly set
-#elif defined(__linux__) && (defined(__clang__) || defined(_GLIBCXX_HAVE_TLS))
+#elif (defined(__linux__) || defined(__ASYLO__)) && \
+    (defined(__clang__) || defined(_GLIBCXX_HAVE_TLS))
 #define ABSL_HAVE_TLS 1
 #endif
 
@@ -229,6 +243,7 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
 #error ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE cannot be directly set
 #elif defined(_LIBCPP_VERSION) || defined(_MSC_VER) || \
+    (defined(__clang__) && __clang_major__ >= 15) ||   \
     (!defined(__clang__) && defined(__GLIBCXX__) &&    \
      ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(4, 8))
 #define ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE 1
@@ -250,26 +265,25 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #elif defined(ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE)
 #error ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE cannot directly set
 #elif (defined(__clang__) && defined(_LIBCPP_VERSION)) ||                    \
+    (defined(__clang__) && __clang_major__ >= 15) ||                         \
     (!defined(__clang__) &&                                                  \
      ((ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(7, 4) && defined(__GLIBCXX__)) || \
       (ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(8, 2) &&                          \
        defined(_LIBCPP_VERSION)))) ||                                        \
-    (defined(_MSC_VER) && !defined(__NVCC__))
+    (defined(_MSC_VER) && !defined(__NVCC__) && !defined(__clang__))
 #define ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE 1
 #define ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE 1
 #endif
 
-// ABSL_HAVE_SOURCE_LOCATION_CURRENT
+// ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE
 //
-// Indicates whether `absl::SourceLocation::current()` will return useful
-// information in some contexts.
-#ifndef ABSL_HAVE_SOURCE_LOCATION_CURRENT
-#if ABSL_INTERNAL_HAS_KEYWORD(__builtin_LINE) && \
-    ABSL_INTERNAL_HAS_KEYWORD(__builtin_FILE)
-#define ABSL_HAVE_SOURCE_LOCATION_CURRENT 1
-#elif ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(5, 0)
-#define ABSL_HAVE_SOURCE_LOCATION_CURRENT 1
-#endif
+// Checks whether `std::is_trivially_copyable<T>` is supported.
+//
+// Notes: Clang 15+ with libc++ supports these features, GCC hasn't been tested.
+#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE)
+#error ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE cannot be directly set
+#elif defined(__clang__) && (__clang_major__ >= 15)
+#define ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE 1
 #endif
 
 // ABSL_HAVE_THREAD_LOCAL
@@ -414,7 +428,8 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
     defined(_AIX) || defined(__ros__) || defined(__native_client__) ||    \
     defined(__asmjs__) || defined(__wasm__) || defined(__Fuchsia__) ||    \
     defined(__sun) || defined(__ASYLO__) || defined(__myriad2__) ||       \
-    defined(__HAIKU__)
+    defined(__HAIKU__) || defined(__OpenBSD__) || defined(__NetBSD__) ||  \
+    defined(__QNX__)
 #define ABSL_HAVE_MMAP 1
 #endif
 
@@ -425,7 +440,8 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #ifdef ABSL_HAVE_PTHREAD_GETSCHEDPARAM
 #error ABSL_HAVE_PTHREAD_GETSCHEDPARAM cannot be directly set
 #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
-    defined(_AIX) || defined(__ros__)
+    defined(_AIX) || defined(__ros__) || defined(__OpenBSD__) ||          \
+    defined(__NetBSD__)
 #define ABSL_HAVE_PTHREAD_GETSCHEDPARAM 1
 #endif
 
@@ -520,22 +536,41 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #error "absl endian detection needs to be set up for your compiler"
 #endif
 
-// macOS 10.13 and iOS 10.11 don't let you use <any>, <optional>, or <variant>
-// even though the headers exist and are publicly noted to work.  See
-// https://github.com/abseil/abseil-cpp/issues/207 and
+// macOS < 10.13 and iOS < 11 don't let you use <any>, <optional>, or <variant>
+// even though the headers exist and are publicly noted to work, because the
+// libc++ shared library shipped on the system doesn't have the requisite
+// exported symbols.  See https://github.com/abseil/abseil-cpp/issues/207 and
 // https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes
+//
 // libc++ spells out the availability requirements in the file
 // llvm-project/libcxx/include/__config via the #define
 // _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS.
-#if defined(__APPLE__) && defined(_LIBCPP_VERSION) && \
-  ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101400) || \
-  (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 120000) || \
-  (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000) || \
-  (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 120000))
+//
+// Unfortunately, Apple initially mis-stated the requirements as macOS < 10.14
+// and iOS < 12 in the libc++ headers. This was corrected by
+// https://github.com/llvm/llvm-project/commit/7fb40e1569dd66292b647f4501b85517e9247953
+// which subsequently made it into the XCode 12.5 release. We need to match the
+// old (incorrect) conditions when built with old XCode, but can use the
+// corrected earlier versions with new XCode.
+#if defined(__APPLE__) && defined(_LIBCPP_VERSION) &&               \
+    ((_LIBCPP_VERSION >= 11000 && /* XCode 12.5 or later: */        \
+      ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&   \
+        __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101300) ||  \
+       (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) &&  \
+        __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 110000) || \
+       (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) &&   \
+        __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 40000) ||   \
+       (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) &&      \
+        __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 110000))) ||   \
+     (_LIBCPP_VERSION < 11000 && /* Pre-XCode 12.5: */              \
+      ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&   \
+        __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101400) ||  \
+       (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) &&  \
+        __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 120000) || \
+       (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) &&   \
+        __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000) ||   \
+       (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) &&      \
+        __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 120000))))
 #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1
 #else
 #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0
@@ -705,8 +740,6 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #endif
 #endif
 
-#undef ABSL_INTERNAL_HAS_KEYWORD
-
 // ABSL_DLL
 //
 // When building Abseil as a DLL, this macro expands to `__declspec(dllexport)`
@@ -732,8 +765,6 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 // a compiler instrumentation module and a run-time library.
 #ifdef ABSL_HAVE_MEMORY_SANITIZER
 #error "ABSL_HAVE_MEMORY_SANITIZER cannot be directly set."
-#elif defined(__SANITIZE_MEMORY__)
-#define ABSL_HAVE_MEMORY_SANITIZER 1
 #elif !defined(__native_client__) && ABSL_HAVE_FEATURE(memory_sanitizer)
 #define ABSL_HAVE_MEMORY_SANITIZER 1
 #endif
@@ -760,6 +791,45 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #define ABSL_HAVE_ADDRESS_SANITIZER 1
 #endif
 
+// ABSL_HAVE_HWADDRESS_SANITIZER
+//
+// Hardware-Assisted AddressSanitizer (or HWASAN) is even faster than asan
+// memory error detector which can use CPU features like ARM TBI, Intel LAM or
+// AMD UAI.
+#ifdef ABSL_HAVE_HWADDRESS_SANITIZER
+#error "ABSL_HAVE_HWADDRESS_SANITIZER cannot be directly set."
+#elif defined(__SANITIZE_HWADDRESS__)
+#define ABSL_HAVE_HWADDRESS_SANITIZER 1
+#elif ABSL_HAVE_FEATURE(hwaddress_sanitizer)
+#define ABSL_HAVE_HWADDRESS_SANITIZER 1
+#endif
+
+// ABSL_HAVE_LEAK_SANITIZER
+//
+// LeakSanitizer (or lsan) is a detector of memory leaks.
+// https://clang.llvm.org/docs/LeakSanitizer.html
+// https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer
+//
+// The macro ABSL_HAVE_LEAK_SANITIZER can be used to detect at compile-time
+// whether the LeakSanitizer is potentially available. However, just because the
+// LeakSanitizer is available does not mean it is active. Use the
+// always-available run-time interface in //absl/debugging/leak_check.h for
+// interacting with LeakSanitizer.
+#ifdef ABSL_HAVE_LEAK_SANITIZER
+#error "ABSL_HAVE_LEAK_SANITIZER cannot be directly set."
+#elif defined(LEAK_SANITIZER)
+// GCC provides no method for detecting the presense of the standalone
+// LeakSanitizer (-fsanitize=leak), so GCC users of -fsanitize=leak should also
+// use -DLEAK_SANITIZER.
+#define ABSL_HAVE_LEAK_SANITIZER 1
+// Clang standalone LeakSanitizer (-fsanitize=leak)
+#elif ABSL_HAVE_FEATURE(leak_sanitizer)
+#define ABSL_HAVE_LEAK_SANITIZER 1
+#elif defined(ABSL_HAVE_ADDRESS_SANITIZER)
+// GCC or Clang using the LeakSanitizer integrated into AddressSanitizer.
+#define ABSL_HAVE_LEAK_SANITIZER 1
+#endif
+
 // ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION
 //
 // Class template argument deduction is a language feature added in C++17.
@@ -769,4 +839,93 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 #define ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION 1
 #endif
 
+// ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+//
+// Prior to C++17, static constexpr variables defined in classes required a
+// separate definition outside of the class body, for example:
+//
+// class Foo {
+//   static constexpr int kBar = 0;
+// };
+// constexpr int Foo::kBar;
+//
+// In C++17, these variables defined in classes are considered inline variables,
+// and the extra declaration is redundant. Since some compilers warn on the
+// extra declarations, ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL can be used
+// conditionally ignore them:
+//
+// #ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+// constexpr int Foo::kBar;
+// #endif
+#if defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
+    ABSL_INTERNAL_CPLUSPLUS_LANG < 201703L
+#define ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL 1
+#endif
+
+// `ABSL_INTERNAL_HAS_RTTI` determines whether abseil is being compiled with
+// RTTI support.
+#ifdef ABSL_INTERNAL_HAS_RTTI
+#error ABSL_INTERNAL_HAS_RTTI cannot be directly set
+#elif !defined(__GNUC__) || defined(__GXX_RTTI)
+#define ABSL_INTERNAL_HAS_RTTI 1
+#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
+
+// ABSL_INTERNAL_HAVE_SSE is used for compile-time detection of SSE support.
+// See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html for an overview of
+// which architectures support the various x86 instruction sets.
+#ifdef ABSL_INTERNAL_HAVE_SSE
+#error ABSL_INTERNAL_HAVE_SSE cannot be directly set
+#elif defined(__SSE__)
+#define ABSL_INTERNAL_HAVE_SSE 1
+#elif defined(_M_X64) || (defined(_M_IX86_FP) && _M_IX86_FP >= 1)
+// MSVC only defines _M_IX86_FP for x86 32-bit code, and _M_IX86_FP >= 1
+// indicates that at least SSE was targeted with the /arch:SSE option.
+// All x86-64 processors support SSE, so support can be assumed.
+// https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
+#define ABSL_INTERNAL_HAVE_SSE 1
+#endif
+
+// ABSL_INTERNAL_HAVE_SSE2 is used for compile-time detection of SSE2 support.
+// See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html for an overview of
+// which architectures support the various x86 instruction sets.
+#ifdef ABSL_INTERNAL_HAVE_SSE2
+#error ABSL_INTERNAL_HAVE_SSE2 cannot be directly set
+#elif defined(__SSE2__)
+#define ABSL_INTERNAL_HAVE_SSE2 1
+#elif defined(_M_X64) || (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
+// MSVC only defines _M_IX86_FP for x86 32-bit code, and _M_IX86_FP >= 2
+// indicates that at least SSE2 was targeted with the /arch:SSE2 option.
+// All x86-64 processors support SSE2, so support can be assumed.
+// https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
+#define ABSL_INTERNAL_HAVE_SSE2 1
+#endif
+
+// ABSL_INTERNAL_HAVE_SSSE3 is used for compile-time detection of SSSE3 support.
+// See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html for an overview of
+// which architectures support the various x86 instruction sets.
+//
+// MSVC does not have a mode that targets SSSE3 at compile-time. To use SSSE3
+// with MSVC requires either assuming that the code will only every run on CPUs
+// that support SSSE3, otherwise __cpuid() can be used to detect support at
+// runtime and fallback to a non-SSSE3 implementation when SSSE3 is unsupported
+// by the CPU.
+#ifdef ABSL_INTERNAL_HAVE_SSSE3
+#error ABSL_INTERNAL_HAVE_SSSE3 cannot be directly set
+#elif defined(__SSSE3__)
+#define ABSL_INTERNAL_HAVE_SSSE3 1
+#endif
+
+// ABSL_INTERNAL_HAVE_ARM_NEON is used for compile-time detection of NEON (ARM
+// SIMD).
+//
+// If __CUDA_ARCH__ is defined, then we are compiling CUDA code in device mode.
+// In device mode, NEON intrinsics are not available, regardless of host
+// platform.
+// https://llvm.org/docs/CompileCudaWithLLVM.html#detecting-clang-vs-nvcc-from-code
+#ifdef ABSL_INTERNAL_HAVE_ARM_NEON
+#error ABSL_INTERNAL_HAVE_ARM_NEON cannot be directly set
+#elif defined(__ARM_NEON) && !defined(__CUDA_ARCH__)
+#define ABSL_INTERNAL_HAVE_ARM_NEON 1
+#endif
+
 #endif  // ABSL_BASE_CONFIG_H_
diff --git a/third_party/abseil-cpp/absl/base/dynamic_annotations.h b/third_party/abseil-cpp/absl/base/dynamic_annotations.h
index 3ea7c1568c..1ebf1d124b 100644
--- a/third_party/abseil-cpp/absl/base/dynamic_annotations.h
+++ b/third_party/abseil-cpp/absl/base/dynamic_annotations.h
@@ -53,9 +53,6 @@
 #include "absl/base/macros.h"
 #endif
 
-// TODO(rogeeff): Remove after the backward compatibility period.
-#include "absl/base/internal/dynamic_annotations.h"  // IWYU pragma: export
-
 // -------------------------------------------------------------------------
 // Decide which features are enabled.
 
diff --git a/third_party/abseil-cpp/absl/base/exception_safety_testing_test.cc b/third_party/abseil-cpp/absl/base/exception_safety_testing_test.cc
index a59be29e91..a87fd6a99e 100644
--- a/third_party/abseil-cpp/absl/base/exception_safety_testing_test.cc
+++ b/third_party/abseil-cpp/absl/base/exception_safety_testing_test.cc
@@ -701,7 +701,10 @@ struct BasicGuaranteeWithExtraContracts : public NonNegative {
 
   static constexpr int kExceptionSentinel = 9999;
 };
+
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 constexpr int BasicGuaranteeWithExtraContracts::kExceptionSentinel;
+#endif
 
 TEST(ExceptionCheckTest, BasicGuaranteeWithExtraContracts) {
   auto tester_with_val =
diff --git a/third_party/abseil-cpp/absl/base/internal/atomic_hook_test_helper.h b/third_party/abseil-cpp/absl/base/internal/atomic_hook_test_helper.h
index 3e72b4977d..c72015ef96 100644
--- a/third_party/abseil-cpp/absl/base/internal/atomic_hook_test_helper.h
+++ b/third_party/abseil-cpp/absl/base/internal/atomic_hook_test_helper.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
-#define ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
+#ifndef ABSL_BASE_INTERNAL_ATOMIC_HOOK_TEST_HELPER_H_
+#define ABSL_BASE_INTERNAL_ATOMIC_HOOK_TEST_HELPER_H_
 
 #include "absl/base/internal/atomic_hook.h"
 
@@ -31,4 +31,4 @@ void RegisterFunc(VoidF func);
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
+#endif  // ABSL_BASE_INTERNAL_ATOMIC_HOOK_TEST_HELPER_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/cycleclock.cc b/third_party/abseil-cpp/absl/base/internal/cycleclock.cc
index 0e65005b89..902e3f5ef1 100644
--- a/third_party/abseil-cpp/absl/base/internal/cycleclock.cc
+++ b/third_party/abseil-cpp/absl/base/internal/cycleclock.cc
@@ -25,6 +25,8 @@
 #include <atomic>
 #include <chrono>  // NOLINT(build/c++11)
 
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
 #include "absl/base/internal/unscaledcycleclock.h"
 
 namespace absl {
@@ -33,44 +35,20 @@ namespace base_internal {
 
 #if ABSL_USE_UNSCALED_CYCLECLOCK
 
-namespace {
-
-#ifdef NDEBUG
-#ifdef ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
-// Not debug mode and the UnscaledCycleClock frequency is the CPU
-// frequency.  Scale the CycleClock to prevent overflow if someone
-// tries to represent the time as cycles since the Unix epoch.
-static constexpr int32_t kShift = 1;
-#else
-// Not debug mode and the UnscaledCycleClock isn't operating at the
-// raw CPU frequency. There is no need to do any scaling, so don't
-// needlessly sacrifice precision.
-static constexpr int32_t kShift = 0;
-#endif
-#else
-// In debug mode use a different shift to discourage depending on a
-// particular shift value.
-static constexpr int32_t kShift = 2;
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr int32_t CycleClock::kShift;
+constexpr double CycleClock::kFrequencyScale;
 #endif
 
-static constexpr double kFrequencyScale = 1.0 / (1 << kShift);
-static std::atomic<CycleClockSourceFunc> cycle_clock_source;
+ABSL_CONST_INIT std::atomic<CycleClockSourceFunc>
+    CycleClock::cycle_clock_source_{nullptr};
 
-CycleClockSourceFunc LoadCycleClockSource() {
-  // Optimize for the common case (no callback) by first doing a relaxed load;
-  // this is significantly faster on non-x86 platforms.
-  if (cycle_clock_source.load(std::memory_order_relaxed) == nullptr) {
-    return nullptr;
-  }
-  // This corresponds to the store(std::memory_order_release) in
-  // CycleClockSource::Register, and makes sure that any updates made prior to
-  // registering the callback are visible to this thread before the callback is
-  // invoked.
-  return cycle_clock_source.load(std::memory_order_acquire);
+void CycleClockSource::Register(CycleClockSourceFunc source) {
+  // Corresponds to the load(std::memory_order_acquire) in LoadCycleClockSource.
+  CycleClock::cycle_clock_source_.store(source, std::memory_order_release);
 }
 
-}  // namespace
-
+#ifdef _WIN32
 int64_t CycleClock::Now() {
   auto fn = LoadCycleClockSource();
   if (fn == nullptr) {
@@ -78,15 +56,7 @@ int64_t CycleClock::Now() {
   }
   return fn() >> kShift;
 }
-
-double CycleClock::Frequency() {
-  return kFrequencyScale * base_internal::UnscaledCycleClock::Frequency();
-}
-
-void CycleClockSource::Register(CycleClockSourceFunc source) {
-  // Corresponds to the load(std::memory_order_acquire) in LoadCycleClockSource.
-  cycle_clock_source.store(source, std::memory_order_release);
-}
+#endif
 
 #else
 
diff --git a/third_party/abseil-cpp/absl/base/internal/cycleclock.h b/third_party/abseil-cpp/absl/base/internal/cycleclock.h
index a18b584445..cbfdf57998 100644
--- a/third_party/abseil-cpp/absl/base/internal/cycleclock.h
+++ b/third_party/abseil-cpp/absl/base/internal/cycleclock.h
@@ -42,14 +42,20 @@
 #ifndef ABSL_BASE_INTERNAL_CYCLECLOCK_H_
 #define ABSL_BASE_INTERNAL_CYCLECLOCK_H_
 
+#include <atomic>
 #include <cstdint>
 
+#include "absl/base/attributes.h"
 #include "absl/base/config.h"
+#include "absl/base/internal/cycleclock_config.h"
+#include "absl/base/internal/unscaledcycleclock.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace base_internal {
 
+using CycleClockSourceFunc = int64_t (*)();
+
 // -----------------------------------------------------------------------------
 // CycleClock
 // -----------------------------------------------------------------------------
@@ -68,12 +74,21 @@ class CycleClock {
   static double Frequency();
 
  private:
+#if ABSL_USE_UNSCALED_CYCLECLOCK
+  static CycleClockSourceFunc LoadCycleClockSource();
+
+  static constexpr int32_t kShift = kCycleClockShift;
+  static constexpr double kFrequencyScale = kCycleClockFrequencyScale;
+
+  ABSL_CONST_INIT static std::atomic<CycleClockSourceFunc> cycle_clock_source_;
+#endif  //  ABSL_USE_UNSCALED_CYCLECLOC
+
   CycleClock() = delete;  // no instances
   CycleClock(const CycleClock&) = delete;
   CycleClock& operator=(const CycleClock&) = delete;
-};
 
-using CycleClockSourceFunc = int64_t (*)();
+  friend class CycleClockSource;
+};
 
 class CycleClockSource {
  private:
@@ -87,6 +102,41 @@ class CycleClockSource {
   static void Register(CycleClockSourceFunc source);
 };
 
+#if ABSL_USE_UNSCALED_CYCLECLOCK
+
+inline CycleClockSourceFunc CycleClock::LoadCycleClockSource() {
+#if !defined(__x86_64__)
+  // Optimize for the common case (no callback) by first doing a relaxed load;
+  // this is significantly faster on non-x86 platforms.
+  if (cycle_clock_source_.load(std::memory_order_relaxed) == nullptr) {
+    return nullptr;
+  }
+#endif  // !defined(__x86_64__)
+
+  // This corresponds to the store(std::memory_order_release) in
+  // CycleClockSource::Register, and makes sure that any updates made prior to
+  // registering the callback are visible to this thread before the callback
+  // is invoked.
+  return cycle_clock_source_.load(std::memory_order_acquire);
+}
+
+// Accessing globals in inlined code in Window DLLs is problematic.
+#ifndef _WIN32
+inline int64_t CycleClock::Now() {
+  auto fn = LoadCycleClockSource();
+  if (fn == nullptr) {
+    return base_internal::UnscaledCycleClock::Now() >> kShift;
+  }
+  return fn() >> kShift;
+}
+#endif
+
+inline double CycleClock::Frequency() {
+  return kFrequencyScale * base_internal::UnscaledCycleClock::Frequency();
+}
+
+#endif  // ABSL_USE_UNSCALED_CYCLECLOCK
+
 }  // namespace base_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/base/internal/cycleclock_config.h b/third_party/abseil-cpp/absl/base/internal/cycleclock_config.h
new file mode 100644
index 0000000000..191112b58e
--- /dev/null
+++ b/third_party/abseil-cpp/absl/base/internal/cycleclock_config.h
@@ -0,0 +1,55 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_BASE_INTERNAL_CYCLECLOCK_CONFIG_H_
+#define ABSL_BASE_INTERNAL_CYCLECLOCK_CONFIG_H_
+
+#include <cstdint>
+
+#include "absl/base/config.h"
+#include "absl/base/internal/inline_variable.h"
+#include "absl/base/internal/unscaledcycleclock_config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace base_internal {
+
+#if ABSL_USE_UNSCALED_CYCLECLOCK
+#ifdef NDEBUG
+#ifdef ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
+// Not debug mode and the UnscaledCycleClock frequency is the CPU
+// frequency.  Scale the CycleClock to prevent overflow if someone
+// tries to represent the time as cycles since the Unix epoch.
+ABSL_INTERNAL_INLINE_CONSTEXPR(int32_t, kCycleClockShift, 1);
+#else
+// Not debug mode and the UnscaledCycleClock isn't operating at the
+// raw CPU frequency. There is no need to do any scaling, so don't
+// needlessly sacrifice precision.
+ABSL_INTERNAL_INLINE_CONSTEXPR(int32_t, kCycleClockShift, 0);
+#endif
+#else   // NDEBUG
+// In debug mode use a different shift to discourage depending on a
+// particular shift value.
+ABSL_INTERNAL_INLINE_CONSTEXPR(int32_t, kCycleClockShift, 2);
+#endif  // NDEBUG
+
+ABSL_INTERNAL_INLINE_CONSTEXPR(double, kCycleClockFrequencyScale,
+                               1.0 / (1 << kCycleClockShift));
+#endif  //  ABSL_USE_UNSCALED_CYCLECLOC
+
+}  // namespace base_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_BASE_INTERNAL_CYCLECLOCK_CONFIG_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/direct_mmap.h b/third_party/abseil-cpp/absl/base/internal/direct_mmap.h
index 274054cd5a..815b8d23ba 100644
--- a/third_party/abseil-cpp/absl/base/internal/direct_mmap.h
+++ b/third_party/abseil-cpp/absl/base/internal/direct_mmap.h
@@ -20,7 +20,7 @@
 
 #include "absl/base/config.h"
 
-#if ABSL_HAVE_MMAP
+#ifdef ABSL_HAVE_MMAP
 
 #include <sys/mman.h>
 
@@ -41,13 +41,13 @@
 
 #ifdef __mips__
 // Include definitions of the ABI currently in use.
-#ifdef __BIONIC__
+#if defined(__BIONIC__) || !defined(__GLIBC__)
 // Android doesn't have sgidefs.h, but does have asm/sgidefs.h, which has the
 // definitions we need.
 #include <asm/sgidefs.h>
 #else
 #include <sgidefs.h>
-#endif  // __BIONIC__
+#endif  // __BIONIC__ || !__GLIBC__
 #endif  // __mips__
 
 // SYS_mmap and SYS_munmap are not defined in Android.
@@ -97,7 +97,8 @@ inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd,
 #ifdef __BIONIC__
   // SYS_mmap2 has problems on Android API level <= 16.
   // Workaround by invoking __mmap2() instead.
-  return __mmap2(start, length, prot, flags, fd, offset / pagesize);
+  return __mmap2(start, length, prot, flags, fd,
+                 static_cast<size_t>(offset / pagesize));
 #else
   return reinterpret_cast<void*>(
       syscall(SYS_mmap2, start, length, prot, flags, fd,
diff --git a/third_party/abseil-cpp/absl/base/internal/dynamic_annotations.h b/third_party/abseil-cpp/absl/base/internal/dynamic_annotations.h
deleted file mode 100644
index b23c5ec1c4..0000000000
--- a/third_party/abseil-cpp/absl/base/internal/dynamic_annotations.h
+++ /dev/null
@@ -1,398 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file defines dynamic annotations for use with dynamic analysis tool
-// such as valgrind, PIN, etc.
-//
-// Dynamic annotation is a source code annotation that affects the generated
-// code (that is, the annotation is not a comment). Each such annotation is
-// attached to a particular instruction and/or to a particular object (address)
-// in the program.
-//
-// The annotations that should be used by users are macros in all upper-case
-// (e.g., ANNOTATE_THREAD_NAME).
-//
-// Actual implementation of these macros may differ depending on the dynamic
-// analysis tool being used.
-//
-// This file supports the following configurations:
-// - Dynamic Annotations enabled (with static thread-safety warnings disabled).
-//   In this case, macros expand to functions implemented by Thread Sanitizer,
-//   when building with TSan. When not provided an external implementation,
-//   dynamic_annotations.cc provides no-op implementations.
-//
-// - Static Clang thread-safety warnings enabled.
-//   When building with a Clang compiler that supports thread-safety warnings,
-//   a subset of annotations can be statically-checked at compile-time. We
-//   expand these macros to static-inline functions that can be analyzed for
-//   thread-safety, but afterwards elided when building the final binary.
-//
-// - All annotations are disabled.
-//   If neither Dynamic Annotations nor Clang thread-safety warnings are
-//   enabled, then all annotation-macros expand to empty.
-
-#ifndef ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_
-#define ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_
-
-#include <stddef.h>
-
-#include "absl/base/config.h"
-
-// -------------------------------------------------------------------------
-// Decide which features are enabled
-
-#ifndef DYNAMIC_ANNOTATIONS_ENABLED
-#define DYNAMIC_ANNOTATIONS_ENABLED 0
-#endif
-
-#if defined(__clang__) && !defined(SWIG)
-#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 1
-#endif
-
-#if DYNAMIC_ANNOTATIONS_ENABLED != 0
-
-#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
-#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED 1
-
-#else
-
-#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 0
-#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 0
-#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 0
-
-// Clang provides limited support for static thread-safety analysis through a
-// feature called Annotalysis. We configure macro-definitions according to
-// whether Annotalysis support is available. When running in opt-mode, GCC
-// will issue a warning, if these attributes are compiled. Only include them
-// when compiling using Clang.
-
-// ANNOTALYSIS_ENABLED == 1 when IGNORE_READ_ATTRIBUTE_ENABLED == 1
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED \
-  defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-// Read/write annotations are enabled in Annotalysis mode; disabled otherwise.
-#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \
-  ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-#endif
-
-// Memory annotations are also made available to LLVM's Memory Sanitizer
-#if defined(ABSL_HAVE_MEMORY_SANITIZER) && !defined(__native_client__)
-#define ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED 1
-#endif
-
-#ifndef ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED
-#define ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED 0
-#endif
-
-#ifdef __cplusplus
-#define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" {
-#define ABSL_INTERNAL_END_EXTERN_C }  // extern "C"
-#define ABSL_INTERNAL_GLOBAL_SCOPED(F) ::F
-#define ABSL_INTERNAL_STATIC_INLINE inline
-#else
-#define ABSL_INTERNAL_BEGIN_EXTERN_C  // empty
-#define ABSL_INTERNAL_END_EXTERN_C    // empty
-#define ABSL_INTERNAL_GLOBAL_SCOPED(F) F
-#define ABSL_INTERNAL_STATIC_INLINE static inline
-#endif
-
-// -------------------------------------------------------------------------
-// Define race annotations.
-
-#if ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 1
-
-// -------------------------------------------------------------
-// Annotations that suppress errors. It is usually better to express the
-// program's synchronization using the other annotations, but these can be used
-// when all else fails.
-
-// Report that we may have a benign race at `pointer`, with size
-// "sizeof(*(pointer))". `pointer` must be a non-void* pointer. Insert at the
-// point where `pointer` has been allocated, preferably close to the point
-// where the race happens. See also ANNOTATE_BENIGN_RACE_STATIC.
-#define ANNOTATE_BENIGN_RACE(pointer, description)     \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized) \
-  (__FILE__, __LINE__, pointer, sizeof(*(pointer)), description)
-
-// Same as ANNOTATE_BENIGN_RACE(`address`, `description`), but applies to
-// the memory range [`address`, `address`+`size`).
-#define ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized)         \
-  (__FILE__, __LINE__, address, size, description)
-
-// Enable (`enable`!=0) or disable (`enable`==0) race detection for all threads.
-// This annotation could be useful if you want to skip expensive race analysis
-// during some period of program execution, e.g. during initialization.
-#define ANNOTATE_ENABLE_RACE_DETECTION(enable)             \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateEnableRaceDetection) \
-  (__FILE__, __LINE__, enable)
-
-// -------------------------------------------------------------
-// Annotations useful for debugging.
-
-// Report the current thread `name` to a race detector.
-#define ANNOTATE_THREAD_NAME(name) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateThreadName)(__FILE__, __LINE__, name)
-
-// -------------------------------------------------------------
-// Annotations useful when implementing locks. They are not normally needed by
-// modules that merely use locks. The `lock` argument is a pointer to the lock
-// object.
-
-// Report that a lock has been created at address `lock`.
-#define ANNOTATE_RWLOCK_CREATE(lock) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock)
-
-// Report that a linker initialized lock has been created at address `lock`.
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-#define ANNOTATE_RWLOCK_CREATE_STATIC(lock)               \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \
-  (__FILE__, __LINE__, lock)
-#else
-#define ANNOTATE_RWLOCK_CREATE_STATIC(lock) ANNOTATE_RWLOCK_CREATE(lock)
-#endif
-
-// Report that the lock at address `lock` is about to be destroyed.
-#define ANNOTATE_RWLOCK_DESTROY(lock) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockDestroy)(__FILE__, __LINE__, lock)
-
-// Report that the lock at address `lock` has been acquired.
-// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
-#define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)          \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockAcquired) \
-  (__FILE__, __LINE__, lock, is_w)
-
-// Report that the lock at address `lock` is about to be released.
-// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
-#define ANNOTATE_RWLOCK_RELEASED(lock, is_w)          \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockReleased) \
-  (__FILE__, __LINE__, lock, is_w)
-
-// Apply ANNOTATE_BENIGN_RACE_SIZED to a static variable `static_var`.
-#define ANNOTATE_BENIGN_RACE_STATIC(static_var, description)      \
-  namespace {                                                     \
-  class static_var##_annotator {                                  \
-   public:                                                        \
-    static_var##_annotator() {                                    \
-      ANNOTATE_BENIGN_RACE_SIZED(&static_var, sizeof(static_var), \
-                                 #static_var ": " description);   \
-    }                                                             \
-  };                                                              \
-  static static_var##_annotator the##static_var##_annotator;      \
-  }  // namespace
-
-#else  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 0
-
-#define ANNOTATE_RWLOCK_CREATE(lock)                            // empty
-#define ANNOTATE_RWLOCK_CREATE_STATIC(lock)                     // empty
-#define ANNOTATE_RWLOCK_DESTROY(lock)                           // empty
-#define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)                    // empty
-#define ANNOTATE_RWLOCK_RELEASED(lock, is_w)                    // empty
-#define ANNOTATE_BENIGN_RACE(address, description)              // empty
-#define ANNOTATE_BENIGN_RACE_SIZED(address, size, description)  // empty
-#define ANNOTATE_THREAD_NAME(name)                              // empty
-#define ANNOTATE_ENABLE_RACE_DETECTION(enable)                  // empty
-#define ANNOTATE_BENIGN_RACE_STATIC(static_var, description)    // empty
-
-#endif  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
-
-// -------------------------------------------------------------------------
-// Define memory annotations.
-
-#if ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED == 1
-
-#include <sanitizer/msan_interface.h>
-
-#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
-  __msan_unpoison(address, size)
-
-#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
-  __msan_allocated_memory(address, size)
-
-#else  // ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED == 0
-
-#if DYNAMIC_ANNOTATIONS_ENABLED == 1
-#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
-  do {                                                \
-    (void)(address);                                  \
-    (void)(size);                                     \
-  } while (0)
-#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
-  do {                                                  \
-    (void)(address);                                    \
-    (void)(size);                                       \
-  } while (0)
-#else
-#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size)    // empty
-#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size)  // empty
-#endif
-
-#endif  // ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED
-
-// -------------------------------------------------------------------------
-// Define IGNORE_READS_BEGIN/_END attributes.
-
-#if defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE \
-  __attribute((exclusive_lock_function("*")))
-#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE \
-  __attribute((unlock_function("*")))
-
-#else  // !defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE  // empty
-#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE    // empty
-
-#endif  // defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-// -------------------------------------------------------------------------
-// Define IGNORE_READS_BEGIN/_END annotations.
-
-#if ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED == 1
-
-// Request the analysis tool to ignore all reads in the current thread until
-// ANNOTATE_IGNORE_READS_END is called. Useful to ignore intentional racey
-// reads, while still checking other reads and all writes.
-// See also ANNOTATE_UNPROTECTED_READ.
-#define ANNOTATE_IGNORE_READS_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsBegin)(__FILE__, __LINE__)
-
-// Stop ignoring reads.
-#define ANNOTATE_IGNORE_READS_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsEnd)(__FILE__, __LINE__)
-
-#elif defined(ABSL_INTERNAL_ANNOTALYSIS_ENABLED)
-
-// When Annotalysis is enabled without Dynamic Annotations, the use of
-// static-inline functions allows the annotations to be read at compile-time,
-// while still letting the compiler elide the functions from the final build.
-//
-// TODO(delesley) -- The exclusive lock here ignores writes as well, but
-// allows IGNORE_READS_AND_WRITES to work properly.
-
-#define ANNOTATE_IGNORE_READS_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsBegin)()
-
-#define ANNOTATE_IGNORE_READS_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsEnd)()
-
-#else
-
-#define ANNOTATE_IGNORE_READS_BEGIN()  // empty
-#define ANNOTATE_IGNORE_READS_END()    // empty
-
-#endif
-
-// -------------------------------------------------------------------------
-// Define IGNORE_WRITES_BEGIN/_END annotations.
-
-#if ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED == 1
-
-// Similar to ANNOTATE_IGNORE_READS_BEGIN, but ignore writes instead.
-#define ANNOTATE_IGNORE_WRITES_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesBegin)(__FILE__, __LINE__)
-
-// Stop ignoring writes.
-#define ANNOTATE_IGNORE_WRITES_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesEnd)(__FILE__, __LINE__)
-
-#else
-
-#define ANNOTATE_IGNORE_WRITES_BEGIN()  // empty
-#define ANNOTATE_IGNORE_WRITES_END()    // empty
-
-#endif
-
-// -------------------------------------------------------------------------
-// Define the ANNOTATE_IGNORE_READS_AND_WRITES_* annotations using the more
-// primitive annotations defined above.
-//
-//     Instead of doing
-//        ANNOTATE_IGNORE_READS_BEGIN();
-//        ... = x;
-//        ANNOTATE_IGNORE_READS_END();
-//     one can use
-//        ... = ANNOTATE_UNPROTECTED_READ(x);
-
-#if defined(ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED)
-
-// Start ignoring all memory accesses (both reads and writes).
-#define ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \
-  do {                                           \
-    ANNOTATE_IGNORE_READS_BEGIN();               \
-    ANNOTATE_IGNORE_WRITES_BEGIN();              \
-  } while (0)
-
-// Stop ignoring both reads and writes.
-#define ANNOTATE_IGNORE_READS_AND_WRITES_END() \
-  do {                                         \
-    ANNOTATE_IGNORE_WRITES_END();              \
-    ANNOTATE_IGNORE_READS_END();               \
-  } while (0)
-
-#ifdef __cplusplus
-// ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads.
-#define ANNOTATE_UNPROTECTED_READ(x) \
-  absl::base_internal::AnnotateUnprotectedRead(x)
-
-#endif
-
-#else
-
-#define ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN()  // empty
-#define ANNOTATE_IGNORE_READS_AND_WRITES_END()    // empty
-#define ANNOTATE_UNPROTECTED_READ(x) (x)
-
-#endif
-
-// -------------------------------------------------------------------------
-// Address sanitizer annotations
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-// Describe the current state of a contiguous container such as e.g.
-// std::vector or std::string. For more details see
-// sanitizer/common_interface_defs.h, which is provided by the compiler.
-#include <sanitizer/common_interface_defs.h>
-
-#define ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) \
-  __sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid)
-#define ADDRESS_SANITIZER_REDZONE(name)    \
-  struct {                                 \
-    char x[8] __attribute__((aligned(8))); \
-  } name
-
-#else
-
-#define ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid)
-#define ADDRESS_SANITIZER_REDZONE(name) static_assert(true, "")
-
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-
-// -------------------------------------------------------------------------
-// Undefine the macros intended only for this file.
-
-#undef ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-#undef ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_BEGIN_EXTERN_C
-#undef ABSL_INTERNAL_END_EXTERN_C
-#undef ABSL_INTERNAL_STATIC_INLINE
-
-#endif  // ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/endian.h b/third_party/abseil-cpp/absl/base/internal/endian.h
index dad0e9aeb0..50747d75ec 100644
--- a/third_party/abseil-cpp/absl/base/internal/endian.h
+++ b/third_party/abseil-cpp/absl/base/internal/endian.h
@@ -16,16 +16,9 @@
 #ifndef ABSL_BASE_INTERNAL_ENDIAN_H_
 #define ABSL_BASE_INTERNAL_ENDIAN_H_
 
-// The following guarantees declaration of the byte swap functions
-#ifdef _MSC_VER
-#include <stdlib.h>  // NOLINT(build/include)
-#elif defined(__FreeBSD__)
-#include <sys/endian.h>
-#elif defined(__GLIBC__)
-#include <byteswap.h>  // IWYU pragma: export
-#endif
-
 #include <cstdint>
+#include <cstdlib>
+
 #include "absl/base/casts.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/unaligned_access.h"
@@ -34,47 +27,11 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
-// Use compiler byte-swapping intrinsics if they are available.  32-bit
-// and 64-bit versions are available in Clang and GCC as of GCC 4.3.0.
-// The 16-bit version is available in Clang and GCC only as of GCC 4.8.0.
-// For simplicity, we enable them all only for GCC 4.8.0 or later.
-#if defined(__clang__) || \
-    (defined(__GNUC__) && \
-     ((__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || __GNUC__ >= 5))
 inline uint64_t gbswap_64(uint64_t host_int) {
+#if ABSL_HAVE_BUILTIN(__builtin_bswap64) || defined(__GNUC__)
   return __builtin_bswap64(host_int);
-}
-inline uint32_t gbswap_32(uint32_t host_int) {
-  return __builtin_bswap32(host_int);
-}
-inline uint16_t gbswap_16(uint16_t host_int) {
-  return __builtin_bswap16(host_int);
-}
-
 #elif defined(_MSC_VER)
-inline uint64_t gbswap_64(uint64_t host_int) {
   return _byteswap_uint64(host_int);
-}
-inline uint32_t gbswap_32(uint32_t host_int) {
-  return _byteswap_ulong(host_int);
-}
-inline uint16_t gbswap_16(uint16_t host_int) {
-  return _byteswap_ushort(host_int);
-}
-
-#else
-inline uint64_t gbswap_64(uint64_t host_int) {
-#if defined(__GNUC__) && defined(__x86_64__) && !defined(__APPLE__)
-  // Adapted from /usr/include/byteswap.h.  Not available on Mac.
-  if (__builtin_constant_p(host_int)) {
-    return __bswap_constant_64(host_int);
-  } else {
-    uint64_t result;
-    __asm__("bswap %0" : "=r"(result) : "0"(host_int));
-    return result;
-  }
-#elif defined(__GLIBC__)
-  return bswap_64(host_int);
 #else
   return (((host_int & uint64_t{0xFF}) << 56) |
           ((host_int & uint64_t{0xFF00}) << 40) |
@@ -84,12 +41,14 @@ inline uint64_t gbswap_64(uint64_t host_int) {
           ((host_int & uint64_t{0xFF0000000000}) >> 24) |
           ((host_int & uint64_t{0xFF000000000000}) >> 40) |
           ((host_int & uint64_t{0xFF00000000000000}) >> 56));
-#endif  // bswap_64
+#endif
 }
 
 inline uint32_t gbswap_32(uint32_t host_int) {
-#if defined(__GLIBC__)
-  return bswap_32(host_int);
+#if ABSL_HAVE_BUILTIN(__builtin_bswap32) || defined(__GNUC__)
+  return __builtin_bswap32(host_int);
+#elif defined(_MSC_VER)
+  return _byteswap_ulong(host_int);
 #else
   return (((host_int & uint32_t{0xFF}) << 24) |
           ((host_int & uint32_t{0xFF00}) << 8) |
@@ -99,33 +58,29 @@ inline uint32_t gbswap_32(uint32_t host_int) {
 }
 
 inline uint16_t gbswap_16(uint16_t host_int) {
-#if defined(__GLIBC__)
-  return bswap_16(host_int);
+#if ABSL_HAVE_BUILTIN(__builtin_bswap16) || defined(__GNUC__)
+  return __builtin_bswap16(host_int);
+#elif defined(_MSC_VER)
+  return _byteswap_ushort(host_int);
 #else
   return (((host_int & uint16_t{0xFF}) << 8) |
           ((host_int & uint16_t{0xFF00}) >> 8));
 #endif
 }
 
-#endif  // intrinsics available
-
 #ifdef ABSL_IS_LITTLE_ENDIAN
 
-// Definitions for ntohl etc. that don't require us to include
-// netinet/in.h. We wrap gbswap_32 and gbswap_16 in functions rather
-// than just #defining them because in debug mode, gcc doesn't
-// correctly handle the (rather involved) definitions of bswap_32.
-// gcc guarantees that inline functions are as fast as macros, so
-// this isn't a performance hit.
+// Portable definitions for htonl (host-to-network) and friends on little-endian
+// architectures.
 inline uint16_t ghtons(uint16_t x) { return gbswap_16(x); }
 inline uint32_t ghtonl(uint32_t x) { return gbswap_32(x); }
 inline uint64_t ghtonll(uint64_t x) { return gbswap_64(x); }
 
 #elif defined ABSL_IS_BIG_ENDIAN
 
-// These definitions are simpler on big-endian machines
-// These are functions instead of macros to avoid self-assignment warnings
-// on calls such as "i = ghtnol(i);".  This also provides type checking.
+// Portable definitions for htonl (host-to-network) etc on big-endian
+// architectures. These definitions are simpler since the host byte order is the
+// same as network byte order.
 inline uint16_t ghtons(uint16_t x) { return x; }
 inline uint32_t ghtonl(uint32_t x) { return x; }
 inline uint64_t ghtonll(uint64_t x) { return x; }
diff --git a/third_party/abseil-cpp/absl/base/internal/fast_type_id.h b/third_party/abseil-cpp/absl/base/internal/fast_type_id.h
index 3db59e8374..a547b3a8bc 100644
--- a/third_party/abseil-cpp/absl/base/internal/fast_type_id.h
+++ b/third_party/abseil-cpp/absl/base/internal/fast_type_id.h
@@ -28,8 +28,10 @@ struct FastTypeTag {
   constexpr static char dummy_var = 0;
 };
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 template <typename Type>
 constexpr char FastTypeTag<Type>::dummy_var;
+#endif
 
 // FastTypeId<Type>() evaluates at compile/link-time to a unique pointer for the
 // passed-in type. These are meant to be good match for keys into maps or
diff --git a/third_party/abseil-cpp/absl/base/internal/inline_variable.h b/third_party/abseil-cpp/absl/base/internal/inline_variable.h
index 130d8c2476..df933faff5 100644
--- a/third_party/abseil-cpp/absl/base/internal/inline_variable.h
+++ b/third_party/abseil-cpp/absl/base/internal/inline_variable.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_
-#define ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_
+#ifndef ABSL_BASE_INTERNAL_INLINE_VARIABLE_H_
+#define ABSL_BASE_INTERNAL_INLINE_VARIABLE_H_
 
 #include <type_traits>
 
@@ -104,4 +104,4 @@
 
 #endif  // __cpp_inline_variables
 
-#endif  // ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_
+#endif  // ABSL_BASE_INTERNAL_INLINE_VARIABLE_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/inline_variable_testing.h b/third_party/abseil-cpp/absl/base/internal/inline_variable_testing.h
index 3856b9f80f..f3c81459fa 100644
--- a/third_party/abseil-cpp/absl/base/internal/inline_variable_testing.h
+++ b/third_party/abseil-cpp/absl/base/internal/inline_variable_testing.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_BASE_INLINE_VARIABLE_TESTING_H_
-#define ABSL_BASE_INLINE_VARIABLE_TESTING_H_
+#ifndef ABSL_BASE_INTERNAL_INLINE_VARIABLE_TESTING_H_
+#define ABSL_BASE_INTERNAL_INLINE_VARIABLE_TESTING_H_
 
 #include "absl/base/internal/inline_variable.h"
 
@@ -43,4 +43,4 @@ const int& get_int_b();
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_BASE_INLINE_VARIABLE_TESTING_H_
+#endif  // ABSL_BASE_INTERNAL_INLINE_VARIABLE_TESTING_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/invoke.h b/third_party/abseil-cpp/absl/base/internal/invoke.h
index 5c71f32823..643c2a42f0 100644
--- a/third_party/abseil-cpp/absl/base/internal/invoke.h
+++ b/third_party/abseil-cpp/absl/base/internal/invoke.h
@@ -14,6 +14,8 @@
 //
 // absl::base_internal::invoke(f, args...) is an implementation of
 // INVOKE(f, args...) from section [func.require] of the C++ standard.
+// When compiled as C++17 and later versions, it is implemented as an alias of
+// std::invoke.
 //
 // [func.require]
 // Define INVOKE (f, t1, t2, ..., tN) as follows:
@@ -35,6 +37,26 @@
 #ifndef ABSL_BASE_INTERNAL_INVOKE_H_
 #define ABSL_BASE_INTERNAL_INVOKE_H_
 
+#include "absl/base/config.h"
+
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+
+#include <functional>
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace base_internal {
+
+using std::invoke;
+using std::invoke_result_t;
+using std::is_invocable_r;
+
+}  // namespace base_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#else  // ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+
 #include <algorithm>
 #include <type_traits>
 #include <utility>
@@ -80,8 +102,18 @@ struct MemFunAndRef : StrippedAccept<MemFunAndRef> {
   static decltype((std::declval<Obj>().*
                    std::declval<MemFun>())(std::declval<Args>()...))
   Invoke(MemFun&& mem_fun, Obj&& obj, Args&&... args) {
+// Ignore bogus GCC warnings on this line.
+// See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101436 for similar example.
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(11, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
     return (std::forward<Obj>(obj).*
             std::forward<MemFun>(mem_fun))(std::forward<Args>(args)...);
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(11, 0)
+#pragma GCC diagnostic pop
+#endif
   }
 };
 
@@ -180,8 +212,30 @@ invoke_result_t<F, Args...> invoke(F&& f, Args&&... args) {
   return Invoker<F, Args...>::type::Invoke(std::forward<F>(f),
                                            std::forward<Args>(args)...);
 }
+
+template <typename AlwaysVoid, typename, typename, typename...>
+struct IsInvocableRImpl : std::false_type {};
+
+template <typename R, typename F, typename... Args>
+struct IsInvocableRImpl<
+    absl::void_t<absl::base_internal::invoke_result_t<F, Args...> >, R, F,
+    Args...>
+    : std::integral_constant<
+          bool,
+          std::is_convertible<absl::base_internal::invoke_result_t<F, Args...>,
+                              R>::value ||
+              std::is_void<R>::value> {};
+
+// Type trait whose member `value` is true if invoking `F` with `Args` is valid,
+// and either the return type is convertible to `R`, or `R` is void.
+// C++11-compatible version of `std::is_invocable_r`.
+template <typename R, typename F, typename... Args>
+using is_invocable_r = IsInvocableRImpl<void, R, F, Args...>;
+
 }  // namespace base_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
 
+#endif  // ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+
 #endif  // ABSL_BASE_INTERNAL_INVOKE_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/low_level_alloc.cc b/third_party/abseil-cpp/absl/base/internal/low_level_alloc.cc
index 229ab9162d..662167b08a 100644
--- a/third_party/abseil-cpp/absl/base/internal/low_level_alloc.cc
+++ b/third_party/abseil-cpp/absl/base/internal/low_level_alloc.cc
@@ -332,7 +332,7 @@ size_t GetPageSize() {
 #elif defined(__wasm__) || defined(__asmjs__)
   return getpagesize();
 #else
-  return sysconf(_SC_PAGESIZE);
+  return static_cast<size_t>(sysconf(_SC_PAGESIZE));
 #endif
 }
 
@@ -364,7 +364,7 @@ LowLevelAlloc::Arena::Arena(uint32_t flags_value)
 }
 
 // L < meta_data_arena->mu
-LowLevelAlloc::Arena *LowLevelAlloc::NewArena(int32_t flags) {
+LowLevelAlloc::Arena *LowLevelAlloc::NewArena(uint32_t flags) {
   Arena *meta_data_arena = DefaultArena();
 #ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
   if ((flags & LowLevelAlloc::kAsyncSignalSafe) != 0) {
diff --git a/third_party/abseil-cpp/absl/base/internal/low_level_alloc.h b/third_party/abseil-cpp/absl/base/internal/low_level_alloc.h
index db91951c82..eabb14a9b4 100644
--- a/third_party/abseil-cpp/absl/base/internal/low_level_alloc.h
+++ b/third_party/abseil-cpp/absl/base/internal/low_level_alloc.h
@@ -103,7 +103,7 @@ class LowLevelAlloc {
   // the provided flags.  For example, the call NewArena(kAsyncSignalSafe)
   // is itself async-signal-safe, as well as generatating an arena that provides
   // async-signal-safe Alloc/Free.
-  static Arena *NewArena(int32_t flags);
+  static Arena *NewArena(uint32_t flags);
 
   // Destroys an arena allocated by NewArena and returns true,
   // provided no allocated blocks remain in the arena.
diff --git a/third_party/abseil-cpp/absl/base/internal/low_level_alloc_test.cc b/third_party/abseil-cpp/absl/base/internal/low_level_alloc_test.cc
index 31abb888a6..8fdec09e88 100644
--- a/third_party/abseil-cpp/absl/base/internal/low_level_alloc_test.cc
+++ b/third_party/abseil-cpp/absl/base/internal/low_level_alloc_test.cc
@@ -86,7 +86,7 @@ static void Test(bool use_new_arena, bool call_malloc_hook, int n) {
   AllocMap::iterator it;
   BlockDesc block_desc;
   int rnd;
-  LowLevelAlloc::Arena *arena = 0;
+  LowLevelAlloc::Arena *arena = nullptr;
   if (use_new_arena) {
     int32_t flags = call_malloc_hook ? LowLevelAlloc::kCallMallocHook : 0;
     arena = LowLevelAlloc::NewArena(flags);
@@ -101,11 +101,10 @@ static void Test(bool use_new_arena, bool call_malloc_hook, int n) {
     case 0:     // coin came up heads: add a block
       using_low_level_alloc = true;
       block_desc.len = rand() & 0x3fff;
-      block_desc.ptr =
-        reinterpret_cast<char *>(
-                        arena == 0
-                        ? LowLevelAlloc::Alloc(block_desc.len)
-                        : LowLevelAlloc::AllocWithArena(block_desc.len, arena));
+      block_desc.ptr = reinterpret_cast<char *>(
+          arena == nullptr
+              ? LowLevelAlloc::Alloc(block_desc.len)
+              : LowLevelAlloc::AllocWithArena(block_desc.len, arena));
       using_low_level_alloc = false;
       RandomizeBlockDesc(&block_desc);
       rnd = rand();
diff --git a/third_party/abseil-cpp/absl/base/internal/prefetch.h b/third_party/abseil-cpp/absl/base/internal/prefetch.h
new file mode 100644
index 0000000000..06419283ba
--- /dev/null
+++ b/third_party/abseil-cpp/absl/base/internal/prefetch.h
@@ -0,0 +1,138 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_BASE_INTERNAL_PREFETCH_H_
+#define ABSL_BASE_INTERNAL_PREFETCH_H_
+
+#include "absl/base/config.h"
+
+#ifdef __SSE__
+#include <xmmintrin.h>
+#endif
+
+#if defined(_MSC_VER) && defined(ABSL_INTERNAL_HAVE_SSE)
+#include <intrin.h>
+#pragma intrinsic(_mm_prefetch)
+#endif
+
+// Compatibility wrappers around __builtin_prefetch, to prefetch data
+// for read if supported by the toolchain.
+
+// Move data into the cache before it is read, or "prefetch" it.
+//
+// The value of `addr` is the address of the memory to prefetch. If
+// the target and compiler support it, data prefetch instructions are
+// generated. If the prefetch is done some time before the memory is
+// read, it may be in the cache by the time the read occurs.
+//
+// The function names specify the temporal locality heuristic applied,
+// using the names of Intel prefetch instructions:
+//
+//   T0 - high degree of temporal locality; data should be left in as
+//        many levels of the cache possible
+//   T1 - moderate degree of temporal locality
+//   T2 - low degree of temporal locality
+//   Nta - no temporal locality, data need not be left in the cache
+//         after the read
+//
+// Incorrect or gratuitous use of these functions can degrade
+// performance, so use them only when representative benchmarks show
+// an improvement.
+//
+// Example usage:
+//
+//   absl::base_internal::PrefetchT0(addr);
+//
+// Currently, the different prefetch calls behave on some Intel
+// architectures as follows:
+//
+//                 SNB..SKL   SKX
+// PrefetchT0()   L1/L2/L3  L1/L2
+// PrefetchT1()      L2/L3     L2
+// PrefetchT2()      L2/L3     L2
+// PrefetchNta()  L1/--/L3  L1*
+//
+// * On SKX PrefetchNta() will bring the line into L1 but will evict
+//   from L3 cache. This might result in surprising behavior.
+//
+// SNB = Sandy Bridge, SKL = Skylake, SKX = Skylake Xeon.
+//
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace base_internal {
+
+void PrefetchT0(const void* addr);
+void PrefetchT1(const void* addr);
+void PrefetchT2(const void* addr);
+void PrefetchNta(const void* addr);
+
+// Implementation details follow.
+
+#if ABSL_HAVE_BUILTIN(__builtin_prefetch) || defined(__GNUC__)
+
+#define ABSL_INTERNAL_HAVE_PREFETCH 1
+
+// See __builtin_prefetch:
+// https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html.
+//
+// These functions speculatively load for read only. This is
+// safe for all currently supported platforms. However, prefetch for
+// store may have problems depending on the target platform.
+//
+inline void PrefetchT0(const void* addr) {
+  // Note: this uses prefetcht0 on Intel.
+  __builtin_prefetch(addr, 0, 3);
+}
+inline void PrefetchT1(const void* addr) {
+  // Note: this uses prefetcht1 on Intel.
+  __builtin_prefetch(addr, 0, 2);
+}
+inline void PrefetchT2(const void* addr) {
+  // Note: this uses prefetcht2 on Intel.
+  __builtin_prefetch(addr, 0, 1);
+}
+inline void PrefetchNta(const void* addr) {
+  // Note: this uses prefetchtnta on Intel.
+  __builtin_prefetch(addr, 0, 0);
+}
+
+#elif defined(ABSL_INTERNAL_HAVE_SSE)
+
+#define ABSL_INTERNAL_HAVE_PREFETCH 1
+
+inline void PrefetchT0(const void* addr) {
+  _mm_prefetch(reinterpret_cast<const char*>(addr), _MM_HINT_T0);
+}
+inline void PrefetchT1(const void* addr) {
+  _mm_prefetch(reinterpret_cast<const char*>(addr), _MM_HINT_T1);
+}
+inline void PrefetchT2(const void* addr) {
+  _mm_prefetch(reinterpret_cast<const char*>(addr), _MM_HINT_T2);
+}
+inline void PrefetchNta(const void* addr) {
+  _mm_prefetch(reinterpret_cast<const char*>(addr), _MM_HINT_NTA);
+}
+
+#else
+inline void PrefetchT0(const void*) {}
+inline void PrefetchT1(const void*) {}
+inline void PrefetchT2(const void*) {}
+inline void PrefetchNta(const void*) {}
+#endif
+
+}  // namespace base_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_BASE_INTERNAL_PREFETCH_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/prefetch_test.cc b/third_party/abseil-cpp/absl/base/internal/prefetch_test.cc
new file mode 100644
index 0000000000..7c1dae462c
--- /dev/null
+++ b/third_party/abseil-cpp/absl/base/internal/prefetch_test.cc
@@ -0,0 +1,43 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/base/internal/prefetch.h"
+
+#include "gtest/gtest.h"
+
+namespace {
+
+int number = 42;
+
+TEST(Prefetch, TemporalLocalityNone) {
+  absl::base_internal::PrefetchNta(&number);
+  EXPECT_EQ(number, 42);
+}
+
+TEST(Prefetch, TemporalLocalityLow) {
+  absl::base_internal::PrefetchT2(&number);
+  EXPECT_EQ(number, 42);
+}
+
+TEST(Prefetch, TemporalLocalityMedium) {
+  absl::base_internal::PrefetchT1(&number);
+  EXPECT_EQ(number, 42);
+}
+
+TEST(Prefetch, TemporalLocalityHigh) {
+  absl::base_internal::PrefetchT0(&number);
+  EXPECT_EQ(number, 42);
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/base/internal/raw_logging.cc b/third_party/abseil-cpp/absl/base/internal/raw_logging.cc
index 074e026adb..6273e8471b 100644
--- a/third_party/abseil-cpp/absl/base/internal/raw_logging.cc
+++ b/third_party/abseil-cpp/absl/base/internal/raw_logging.cc
@@ -14,15 +14,17 @@
 
 #include "absl/base/internal/raw_logging.h"
 
-#include <stddef.h>
 #include <cstdarg>
+#include <cstddef>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <string>
 
 #include "absl/base/attributes.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/atomic_hook.h"
+#include "absl/base/internal/errno_saver.h"
 #include "absl/base/log_severity.h"
 
 // We know how to perform low-level writes to stderr in POSIX and Windows.  For
@@ -36,8 +38,8 @@
 // This preprocessor token is also defined in raw_io.cc.  If you need to copy
 // this, consider moving both to config.h instead.
 #if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
-    defined(__Fuchsia__) || defined(__native_client__) || \
-    defined(__EMSCRIPTEN__) || defined(__ASYLO__)
+    defined(__Fuchsia__) || defined(__native_client__) ||               \
+    defined(__OpenBSD__) || defined(__EMSCRIPTEN__) || defined(__ASYLO__)
 
 #include <unistd.h>
 
@@ -50,7 +52,8 @@
 // ABSL_HAVE_SYSCALL_WRITE is defined when the platform provides the syscall
 //   syscall(SYS_write, /*int*/ fd, /*char* */ buf, /*size_t*/ len);
 // for low level operations that want to avoid libc.
-#if (defined(__linux__) || defined(__FreeBSD__)) && !defined(__ANDROID__)
+#if (defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__)) && \
+    !defined(__ANDROID__)
 #include <sys/syscall.h>
 #define ABSL_HAVE_SYSCALL_WRITE 1
 #define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
@@ -69,20 +72,13 @@
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
-namespace raw_logging_internal {
+namespace raw_log_internal {
 namespace {
 
 // TODO(gfalcon): We want raw-logging to work on as many platforms as possible.
 // Explicitly `#error` out when not `ABSL_LOW_LEVEL_WRITE_SUPPORTED`, except for
 // a selected set of platforms for which we expect not to be able to raw log.
 
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-    absl::base_internal::AtomicHook<LogPrefixHook>
-        log_prefix_hook;
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-    absl::base_internal::AtomicHook<AbortHook>
-        abort_hook;
-
 #ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
 constexpr char kTruncated[] = " ... (message truncated)\n";
 
@@ -93,12 +89,14 @@ constexpr char kTruncated[] = " ... (message truncated)\n";
 bool VADoRawLog(char** buf, int* size, const char* format, va_list ap)
     ABSL_PRINTF_ATTRIBUTE(3, 0);
 bool VADoRawLog(char** buf, int* size, const char* format, va_list ap) {
-  int n = vsnprintf(*buf, *size, format, ap);
+  if (*size < 0)
+    return false;
+  int n = vsnprintf(*buf, static_cast<size_t>(*size), format, ap);
   bool result = true;
   if (n < 0 || n > *size) {
     result = false;
     if (static_cast<size_t>(*size) > sizeof(kTruncated)) {
-      n = *size - sizeof(kTruncated);  // room for truncation message
+      n = *size - static_cast<int>(sizeof(kTruncated));
     } else {
       n = 0;  // no room for truncation message
     }
@@ -120,9 +118,11 @@ constexpr int kLogBufSize = 3000;
 bool DoRawLog(char** buf, int* size, const char* format, ...)
     ABSL_PRINTF_ATTRIBUTE(3, 4);
 bool DoRawLog(char** buf, int* size, const char* format, ...) {
+  if (*size < 0)
+    return false;
   va_list ap;
   va_start(ap, format);
-  int n = vsnprintf(*buf, *size, format, ap);
+  int n = vsnprintf(*buf, static_cast<size_t>(*size), format, ap);
   va_end(ap);
   if (n < 0 || n > *size) return false;
   *size -= n;
@@ -130,6 +130,18 @@ bool DoRawLog(char** buf, int* size, const char* format, ...) {
   return true;
 }
 
+bool DefaultLogFilterAndPrefix(absl::LogSeverity, const char* file, int line,
+                               char** buf, int* buf_size) {
+  DoRawLog(buf, buf_size, "[%s : %d] RAW: ", file, line);
+  return true;
+}
+
+ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
+absl::base_internal::AtomicHook<LogFilterAndPrefixHook>
+    log_filter_and_prefix_hook(DefaultLogFilterAndPrefix);
+ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
+absl::base_internal::AtomicHook<AbortHook> abort_hook;
+
 void RawLogVA(absl::LogSeverity severity, const char* file, int line,
               const char* format, va_list ap) ABSL_PRINTF_ATTRIBUTE(4, 0);
 void RawLogVA(absl::LogSeverity severity, const char* file, int line,
@@ -150,14 +162,7 @@ void RawLogVA(absl::LogSeverity severity, const char* file, int line,
   }
 #endif
 
-  auto log_prefix_hook_ptr = log_prefix_hook.Load();
-  if (log_prefix_hook_ptr) {
-    enabled = log_prefix_hook_ptr(severity, file, line, &buf, &size);
-  } else {
-    if (enabled) {
-      DoRawLog(&buf, &size, "[%s : %d] RAW: ", file, line);
-    }
-  }
+  enabled = log_filter_and_prefix_hook(severity, file, line, &buf, &size);
   const char* const prefix_end = buf;
 
 #ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
@@ -168,11 +173,12 @@ void RawLogVA(absl::LogSeverity severity, const char* file, int line,
     } else {
       DoRawLog(&buf, &size, "%s", kTruncated);
     }
-    SafeWriteToStderr(buffer, strlen(buffer));
+    AsyncSignalSafeWriteToStderr(buffer, strlen(buffer));
   }
 #else
   static_cast<void>(format);
   static_cast<void>(ap);
+  static_cast<void>(enabled);
 #endif
 
   // Abort the process after logging a FATAL message, even if the output itself
@@ -195,13 +201,16 @@ void DefaultInternalLog(absl::LogSeverity severity, const char* file, int line,
 
 }  // namespace
 
-void SafeWriteToStderr(const char *s, size_t len) {
+void AsyncSignalSafeWriteToStderr(const char* s, size_t len) {
+  absl::base_internal::ErrnoSaver errno_saver;
 #if defined(ABSL_HAVE_SYSCALL_WRITE)
+  // We prefer calling write via `syscall` to minimize the risk of libc doing
+  // something "helpful".
   syscall(SYS_write, STDERR_FILENO, s, len);
 #elif defined(ABSL_HAVE_POSIX_WRITE)
   write(STDERR_FILENO, s, len);
 #elif defined(ABSL_HAVE_RAW_IO)
-  _write(/* stderr */ 2, s, len);
+  _write(/* stderr */ 2, s, static_cast<unsigned>(len));
 #else
   // stderr logging unsupported on this platform
   (void) s;
@@ -229,7 +238,9 @@ ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_DLL
     absl::base_internal::AtomicHook<InternalLogFunction>
         internal_log_function(DefaultInternalLog);
 
-void RegisterLogPrefixHook(LogPrefixHook func) { log_prefix_hook.Store(func); }
+void RegisterLogFilterAndPrefixHook(LogFilterAndPrefixHook func) {
+  log_filter_and_prefix_hook.Store(func);
+}
 
 void RegisterAbortHook(AbortHook func) { abort_hook.Store(func); }
 
@@ -237,6 +248,6 @@ void RegisterInternalLogFunction(InternalLogFunction func) {
   internal_log_function.Store(func);
 }
 
-}  // namespace raw_logging_internal
+}  // namespace raw_log_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/base/internal/raw_logging.h b/third_party/abseil-cpp/absl/base/internal/raw_logging.h
index 2bf7aabac1..db2ef38e07 100644
--- a/third_party/abseil-cpp/absl/base/internal/raw_logging.h
+++ b/third_party/abseil-cpp/absl/base/internal/raw_logging.h
@@ -43,12 +43,11 @@
 
 #define ABSL_RAW_LOG(severity, ...)                                            \
   do {                                                                         \
-    constexpr const char* absl_raw_logging_internal_basename =                 \
-        ::absl::raw_logging_internal::Basename(__FILE__,                       \
-                                               sizeof(__FILE__) - 1);          \
-    ::absl::raw_logging_internal::RawLog(ABSL_RAW_LOGGING_INTERNAL_##severity, \
-                                         absl_raw_logging_internal_basename,   \
-                                         __LINE__, __VA_ARGS__);               \
+    constexpr const char* absl_raw_log_internal_basename =                     \
+        ::absl::raw_log_internal::Basename(__FILE__, sizeof(__FILE__) - 1);    \
+    ::absl::raw_log_internal::RawLog(ABSL_RAW_LOG_INTERNAL_##severity,         \
+                                     absl_raw_log_internal_basename, __LINE__, \
+                                     __VA_ARGS__);                             \
   } while (0)
 
 // Similar to CHECK(condition) << message, but for low-level modules:
@@ -72,14 +71,14 @@
 //
 // The API is a subset of the above: each macro only takes two arguments.  Use
 // StrCat if you need to build a richer message.
-#define ABSL_INTERNAL_LOG(severity, message)                                 \
-  do {                                                                       \
-    constexpr const char* absl_raw_logging_internal_filename = __FILE__;     \
-    ::absl::raw_logging_internal::internal_log_function(                     \
-        ABSL_RAW_LOGGING_INTERNAL_##severity,                                \
-        absl_raw_logging_internal_filename, __LINE__, message);              \
-    if (ABSL_RAW_LOGGING_INTERNAL_##severity == ::absl::LogSeverity::kFatal) \
-      ABSL_INTERNAL_UNREACHABLE;                                             \
+#define ABSL_INTERNAL_LOG(severity, message)                              \
+  do {                                                                    \
+    constexpr const char* absl_raw_log_internal_filename = __FILE__;      \
+    ::absl::raw_log_internal::internal_log_function(                      \
+        ABSL_RAW_LOG_INTERNAL_##severity, absl_raw_log_internal_filename, \
+        __LINE__, message);                                               \
+    if (ABSL_RAW_LOG_INTERNAL_##severity == ::absl::LogSeverity::kFatal)  \
+      ABSL_INTERNAL_UNREACHABLE;                                          \
   } while (0)
 
 #define ABSL_INTERNAL_CHECK(condition, message)                    \
@@ -91,16 +90,16 @@
     }                                                              \
   } while (0)
 
-#define ABSL_RAW_LOGGING_INTERNAL_INFO ::absl::LogSeverity::kInfo
-#define ABSL_RAW_LOGGING_INTERNAL_WARNING ::absl::LogSeverity::kWarning
-#define ABSL_RAW_LOGGING_INTERNAL_ERROR ::absl::LogSeverity::kError
-#define ABSL_RAW_LOGGING_INTERNAL_FATAL ::absl::LogSeverity::kFatal
-#define ABSL_RAW_LOGGING_INTERNAL_LEVEL(severity) \
+#define ABSL_RAW_LOG_INTERNAL_INFO ::absl::LogSeverity::kInfo
+#define ABSL_RAW_LOG_INTERNAL_WARNING ::absl::LogSeverity::kWarning
+#define ABSL_RAW_LOG_INTERNAL_ERROR ::absl::LogSeverity::kError
+#define ABSL_RAW_LOG_INTERNAL_FATAL ::absl::LogSeverity::kFatal
+#define ABSL_RAW_LOG_INTERNAL_LEVEL(severity) \
   ::absl::NormalizeLogSeverity(severity)
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
-namespace raw_logging_internal {
+namespace raw_log_internal {
 
 // Helper function to implement ABSL_RAW_LOG
 // Logs format... at "severity" level, reporting it
@@ -109,12 +108,9 @@ namespace raw_logging_internal {
 void RawLog(absl::LogSeverity severity, const char* file, int line,
             const char* format, ...) ABSL_PRINTF_ATTRIBUTE(4, 5);
 
-// Writes the provided buffer directly to stderr, in a safe, low-level manner.
-//
-// In POSIX this means calling write(), which is async-signal safe and does
-// not malloc.  If the platform supports the SYS_write syscall, we invoke that
-// directly to side-step any libc interception.
-void SafeWriteToStderr(const char *s, size_t len);
+// Writes the provided buffer directly to stderr, in a signal-safe, low-level
+// manner.
+void AsyncSignalSafeWriteToStderr(const char* s, size_t len);
 
 // compile-time function to get the "base" filename, that is, the part of
 // a filename after the last "/" or "\" path separator.  The search starts at
@@ -133,7 +129,7 @@ constexpr const char* Basename(const char* fname, int offset) {
 // TODO(gfalcon): Come up with a better name for this method.
 bool RawLoggingFullySupported();
 
-// Function type for a raw_logging customization hook for suppressing messages
+// Function type for a raw_log customization hook for suppressing messages
 // by severity, and for writing custom prefixes on non-suppressed messages.
 //
 // The installed hook is called for every raw log invocation.  The message will
@@ -142,19 +138,20 @@ bool RawLoggingFullySupported();
 // also provided with an output buffer, where it can write a custom log message
 // prefix.
 //
-// The raw_logging system does not allocate memory or grab locks.  User-provided
+// The raw_log system does not allocate memory or grab locks.  User-provided
 // hooks must avoid these operations, and must not throw exceptions.
 //
 // 'severity' is the severity level of the message being written.
 // 'file' and 'line' are the file and line number where the ABSL_RAW_LOG macro
 // was located.
-// 'buffer' and 'buf_size' are pointers to the buffer and buffer size.  If the
-// hook writes a prefix, it must increment *buffer and decrement *buf_size
+// 'buf' and 'buf_size' are pointers to the buffer and buffer size.  If the
+// hook writes a prefix, it must increment *buf and decrement *buf_size
 // accordingly.
-using LogPrefixHook = bool (*)(absl::LogSeverity severity, const char* file,
-                               int line, char** buffer, int* buf_size);
+using LogFilterAndPrefixHook = bool (*)(absl::LogSeverity severity,
+                                        const char* file, int line, char** buf,
+                                        int* buf_size);
 
-// Function type for a raw_logging customization hook called to abort a process
+// Function type for a raw_log customization hook called to abort a process
 // when a FATAL message is logged.  If the provided AbortHook() returns, the
 // logging system will call abort().
 //
@@ -162,7 +159,10 @@ using LogPrefixHook = bool (*)(absl::LogSeverity severity, const char* file,
 // was located.
 // The NUL-terminated logged message lives in the buffer between 'buf_start'
 // and 'buf_end'.  'prefix_end' points to the first non-prefix character of the
-// buffer (as written by the LogPrefixHook.)
+// buffer (as written by the LogFilterAndPrefixHook.)
+//
+// The lifetime of the filename and message buffers will not end while the
+// process remains alive.
 using AbortHook = void (*)(const char* file, int line, const char* buf_start,
                            const char* prefix_end, const char* buf_end);
 
@@ -184,11 +184,11 @@ ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_DLL extern base_internal::AtomicHook<
 //
 // These functions are safe to call at any point during initialization; they do
 // not block or malloc, and are async-signal safe.
-void RegisterLogPrefixHook(LogPrefixHook func);
+void RegisterLogFilterAndPrefixHook(LogFilterAndPrefixHook func);
 void RegisterAbortHook(AbortHook func);
 void RegisterInternalLogFunction(InternalLogFunction func);
 
-}  // namespace raw_logging_internal
+}  // namespace raw_log_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
 
diff --git a/third_party/abseil-cpp/absl/base/internal/spinlock.cc b/third_party/abseil-cpp/absl/base/internal/spinlock.cc
index 35c0696a34..381b913b29 100644
--- a/third_party/abseil-cpp/absl/base/internal/spinlock.cc
+++ b/third_party/abseil-cpp/absl/base/internal/spinlock.cc
@@ -19,6 +19,7 @@
 #include <limits>
 
 #include "absl/base/attributes.h"
+#include "absl/base/config.h"
 #include "absl/base/internal/atomic_hook.h"
 #include "absl/base/internal/cycleclock.h"
 #include "absl/base/internal/spinlock_wait.h"
@@ -66,12 +67,14 @@ void RegisterSpinLockProfiler(void (*fn)(const void *contendedlock,
   submit_profile_data.Store(fn);
 }
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 // Static member variable definitions.
 constexpr uint32_t SpinLock::kSpinLockHeld;
 constexpr uint32_t SpinLock::kSpinLockCooperative;
 constexpr uint32_t SpinLock::kSpinLockDisabledScheduling;
 constexpr uint32_t SpinLock::kSpinLockSleeper;
 constexpr uint32_t SpinLock::kWaitTimeMask;
+#endif
 
 // Uncommon constructors.
 SpinLock::SpinLock(base_internal::SchedulingMode mode)
@@ -175,7 +178,7 @@ void SpinLock::SlowUnlock(uint32_t lock_value) {
   // reserve a unitary wait time to represent that a waiter exists without our
   // own acquisition having been contended.
   if ((lock_value & kWaitTimeMask) != kSpinLockSleeper) {
-    const uint64_t wait_cycles = DecodeWaitCycles(lock_value);
+    const int64_t wait_cycles = DecodeWaitCycles(lock_value);
     ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0);
     submit_profile_data(this, wait_cycles);
     ABSL_TSAN_MUTEX_POST_DIVERT(this, 0);
@@ -217,9 +220,9 @@ uint32_t SpinLock::EncodeWaitCycles(int64_t wait_start_time,
   return clamped;
 }
 
-uint64_t SpinLock::DecodeWaitCycles(uint32_t lock_value) {
+int64_t SpinLock::DecodeWaitCycles(uint32_t lock_value) {
   // Cast to uint32_t first to ensure bits [63:32] are cleared.
-  const uint64_t scaled_wait_time =
+  const int64_t scaled_wait_time =
       static_cast<uint32_t>(lock_value & kWaitTimeMask);
   return scaled_wait_time << (kProfileTimestampShift - kLockwordReservedShift);
 }
diff --git a/third_party/abseil-cpp/absl/base/internal/spinlock.h b/third_party/abseil-cpp/absl/base/internal/spinlock.h
index ac40daff12..09ba5824b1 100644
--- a/third_party/abseil-cpp/absl/base/internal/spinlock.h
+++ b/third_party/abseil-cpp/absl/base/internal/spinlock.h
@@ -29,10 +29,8 @@
 #ifndef ABSL_BASE_INTERNAL_SPINLOCK_H_
 #define ABSL_BASE_INTERNAL_SPINLOCK_H_
 
-#include <stdint.h>
-#include <sys/types.h>
-
 #include <atomic>
+#include <cstdint>
 
 #include "absl/base/attributes.h"
 #include "absl/base/const_init.h"
@@ -41,8 +39,6 @@
 #include "absl/base/internal/raw_logging.h"
 #include "absl/base/internal/scheduling_mode.h"
 #include "absl/base/internal/tsan_mutex_interface.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
 #include "absl/base/thread_annotations.h"
 
 namespace absl {
@@ -120,6 +116,14 @@ class ABSL_LOCKABLE SpinLock {
     return (lockword_.load(std::memory_order_relaxed) & kSpinLockHeld) != 0;
   }
 
+  // Return immediately if this thread holds the SpinLock exclusively.
+  // Otherwise, report an error by crashing with a diagnostic.
+  inline void AssertHeld() const ABSL_ASSERT_EXCLUSIVE_LOCK() {
+    if (!IsHeld()) {
+      ABSL_RAW_LOG(FATAL, "thread should hold the lock on SpinLock");
+    }
+  }
+
  protected:
   // These should not be exported except for testing.
 
@@ -129,7 +133,7 @@ class ABSL_LOCKABLE SpinLock {
                                    int64_t wait_end_time);
 
   // Extract number of wait cycles in a lock value.
-  static uint64_t DecodeWaitCycles(uint32_t lock_value);
+  static int64_t DecodeWaitCycles(uint32_t lock_value);
 
   // Provide access to protected method above.  Use for testing only.
   friend struct SpinLockTest;
diff --git a/third_party/abseil-cpp/absl/base/internal/spinlock_linux.inc b/third_party/abseil-cpp/absl/base/internal/spinlock_linux.inc
index 202f7cdfc8..fe8ba674f5 100644
--- a/third_party/abseil-cpp/absl/base/internal/spinlock_linux.inc
+++ b/third_party/abseil-cpp/absl/base/internal/spinlock_linux.inc
@@ -57,13 +57,10 @@ static_assert(sizeof(std::atomic<uint32_t>) == sizeof(int),
 extern "C" {
 
 ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(AbslInternalSpinLockDelay)(
-    std::atomic<uint32_t> *w, uint32_t value, int loop,
+    std::atomic<uint32_t> *w, uint32_t value, int,
     absl::base_internal::SchedulingMode) {
   absl::base_internal::ErrnoSaver errno_saver;
-  struct timespec tm;
-  tm.tv_sec = 0;
-  tm.tv_nsec = absl::base_internal::SpinLockSuggestedDelayNS(loop);
-  syscall(SYS_futex, w, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, value, &tm);
+  syscall(SYS_futex, w, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, value, nullptr);
 }
 
 ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(AbslInternalSpinLockWake)(
diff --git a/third_party/abseil-cpp/absl/base/internal/spinlock_win32.inc b/third_party/abseil-cpp/absl/base/internal/spinlock_win32.inc
index 9d224813a5..934c2016fb 100644
--- a/third_party/abseil-cpp/absl/base/internal/spinlock_win32.inc
+++ b/third_party/abseil-cpp/absl/base/internal/spinlock_win32.inc
@@ -27,7 +27,10 @@ void ABSL_INTERNAL_C_SYMBOL(AbslInternalSpinLockDelay)(
   } else if (loop == 1) {
     Sleep(0);
   } else {
-    Sleep(absl::base_internal::SpinLockSuggestedDelayNS(loop) / 1000000);
+    // SpinLockSuggestedDelayNS() always returns a positive integer, so this
+    // static_cast is safe.
+    Sleep(static_cast<DWORD>(
+        absl::base_internal::SpinLockSuggestedDelayNS(loop) / 1000000));
   }
 }
 
diff --git a/third_party/abseil-cpp/absl/base/internal/strerror.cc b/third_party/abseil-cpp/absl/base/internal/strerror.cc
index 0d6226fd0a..de91c05e07 100644
--- a/third_party/abseil-cpp/absl/base/internal/strerror.cc
+++ b/third_party/abseil-cpp/absl/base/internal/strerror.cc
@@ -66,8 +66,8 @@ constexpr int kSysNerr = 135;
 
 std::array<std::string, kSysNerr>* NewStrErrorTable() {
   auto* table = new std::array<std::string, kSysNerr>;
-  for (int i = 0; i < static_cast<int>(table->size()); ++i) {
-    (*table)[i] = StrErrorInternal(i);
+  for (size_t i = 0; i < table->size(); ++i) {
+    (*table)[i] = StrErrorInternal(static_cast<int>(i));
   }
   return table;
 }
@@ -77,8 +77,8 @@ std::array<std::string, kSysNerr>* NewStrErrorTable() {
 std::string StrError(int errnum) {
   absl::base_internal::ErrnoSaver errno_saver;
   static const auto* table = NewStrErrorTable();
-  if (errnum >= 0 && errnum < static_cast<int>(table->size())) {
-    return (*table)[errnum];
+  if (errnum >= 0 && static_cast<size_t>(errnum) < table->size()) {
+    return (*table)[static_cast<size_t>(errnum)];
   }
   return StrErrorInternal(errnum);
 }
diff --git a/third_party/abseil-cpp/absl/base/internal/sysinfo.cc b/third_party/abseil-cpp/absl/base/internal/sysinfo.cc
index a7cfb461f3..da499d3a77 100644
--- a/third_party/abseil-cpp/absl/base/internal/sysinfo.cc
+++ b/third_party/abseil-cpp/absl/base/internal/sysinfo.cc
@@ -117,19 +117,18 @@ int Win32NumCPUs() {
     }
   }
   free(info);
-  return logicalProcessorCount;
+  return static_cast<int>(logicalProcessorCount);
 }
 
 #endif
 
 }  // namespace
 
-
 static int GetNumCPUs() {
 #if defined(__myriad2__)
   return 1;
 #elif defined(_WIN32)
-  const unsigned hardware_concurrency = Win32NumCPUs();
+  const int hardware_concurrency = Win32NumCPUs();
   return hardware_concurrency ? hardware_concurrency : 1;
 #elif defined(_AIX)
   return sysconf(_SC_NPROCESSORS_ONLN);
@@ -137,7 +136,7 @@ static int GetNumCPUs() {
   // Other possibilities:
   //  - Read /sys/devices/system/cpu/online and use cpumask_parse()
   //  - sysconf(_SC_NPROCESSORS_ONLN)
-  return std::thread::hardware_concurrency();
+  return static_cast<int>(std::thread::hardware_concurrency());
 #endif
 }
 
@@ -190,12 +189,15 @@ static double GetNominalCPUFrequency() {
 // and the memory location pointed to by value is set to the value read.
 static bool ReadLongFromFile(const char *file, long *value) {
   bool ret = false;
-  int fd = open(file, O_RDONLY);
+  int fd = open(file, O_RDONLY | O_CLOEXEC);
   if (fd != -1) {
     char line[1024];
     char *err;
     memset(line, '\0', sizeof(line));
-    int len = read(fd, line, sizeof(line) - 1);
+    ssize_t len;
+    do {
+      len = read(fd, line, sizeof(line) - 1);
+    } while (len < 0 && errno == EINTR);
     if (len <= 0) {
       ret = false;
     } else {
@@ -377,7 +379,7 @@ pid_t GetTID() {
 #endif
 
 pid_t GetTID() {
-  return syscall(SYS_gettid);
+  return static_cast<pid_t>(syscall(SYS_gettid));
 }
 
 #elif defined(__akaros__)
@@ -430,11 +432,11 @@ static constexpr int kBitsPerWord = 32;  // tid_array is uint32_t.
 // Returns the TID to tid_array.
 static void FreeTID(void *v) {
   intptr_t tid = reinterpret_cast<intptr_t>(v);
-  int word = tid / kBitsPerWord;
+  intptr_t word = tid / kBitsPerWord;
   uint32_t mask = ~(1u << (tid % kBitsPerWord));
   absl::base_internal::SpinLockHolder lock(&tid_lock);
   assert(0 <= word && static_cast<size_t>(word) < tid_array->size());
-  (*tid_array)[word] &= mask;
+  (*tid_array)[static_cast<size_t>(word)] &= mask;
 }
 
 static void InitGetTID() {
@@ -456,7 +458,7 @@ pid_t GetTID() {
 
   intptr_t tid = reinterpret_cast<intptr_t>(pthread_getspecific(tid_key));
   if (tid != 0) {
-    return tid;
+    return static_cast<pid_t>(tid);
   }
 
   int bit;  // tid_array[word] = 1u << bit;
@@ -477,7 +479,8 @@ pid_t GetTID() {
     while (bit < kBitsPerWord && (((*tid_array)[word] >> bit) & 1) != 0) {
       ++bit;
     }
-    tid = (word * kBitsPerWord) + bit;
+    tid =
+        static_cast<intptr_t>((word * kBitsPerWord) + static_cast<size_t>(bit));
     (*tid_array)[word] |= 1u << bit;  // Mark the TID as allocated.
   }
 
diff --git a/third_party/abseil-cpp/absl/base/internal/sysinfo_test.cc b/third_party/abseil-cpp/absl/base/internal/sysinfo_test.cc
index 5f9e45f6aa..f305b6c532 100644
--- a/third_party/abseil-cpp/absl/base/internal/sysinfo_test.cc
+++ b/third_party/abseil-cpp/absl/base/internal/sysinfo_test.cc
@@ -37,29 +37,6 @@ TEST(SysinfoTest, NumCPUs) {
       << "NumCPUs() should not have the default value of 0";
 }
 
-// Ensure that NominalCPUFrequency returns a reasonable value, or 1.00 on
-// platforms where the CPU frequency is not available through sysfs.
-//
-// POWER is particularly problematic here; some Linux kernels expose the CPU
-// frequency, while others do not. Since we can't predict a priori what a given
-// machine is going to do, just disable this test on POWER on Linux.
-#if !(defined(__linux) && (defined(__ppc64__) || defined(__PPC64__)))
-TEST(SysinfoTest, NominalCPUFrequency) {
-  // Linux only exposes the CPU frequency on certain architectures, and
-  // Emscripten doesn't expose it at all.
-#if defined(__linux__) &&                                                  \
-        (defined(__aarch64__) || defined(__hppa__) || defined(__mips__) || \
-         defined(__riscv) || defined(__s390x__)) ||                        \
-    defined(__EMSCRIPTEN__)
-  EXPECT_EQ(NominalCPUFrequency(), 1.0)
-      << "CPU frequency detection was fixed! Please update unittest.";
-#else
-  EXPECT_GE(NominalCPUFrequency(), 1000.0)
-      << "NominalCPUFrequency() did not return a reasonable value";
-#endif
-}
-#endif
-
 TEST(SysinfoTest, GetTID) {
   EXPECT_EQ(GetTID(), GetTID());  // Basic compile and equality test.
 #ifdef __native_client__
diff --git a/third_party/abseil-cpp/absl/base/internal/thread_annotations.h b/third_party/abseil-cpp/absl/base/internal/thread_annotations.h
deleted file mode 100644
index 4dab6a9c15..0000000000
--- a/third_party/abseil-cpp/absl/base/internal/thread_annotations.h
+++ /dev/null
@@ -1,271 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: thread_annotations.h
-// -----------------------------------------------------------------------------
-//
-// WARNING: This is a backwards compatible header and it will be removed after
-// the migration to prefixed thread annotations is finished; please include
-// "absl/base/thread_annotations.h".
-//
-// This header file contains macro definitions for thread safety annotations
-// that allow developers to document the locking policies of multi-threaded
-// code. The annotations can also help program analysis tools to identify
-// potential thread safety issues.
-//
-// These annotations are implemented using compiler attributes. Using the macros
-// defined here instead of raw attributes allow for portability and future
-// compatibility.
-//
-// When referring to mutexes in the arguments of the attributes, you should
-// use variable names or more complex expressions (e.g. my_object->mutex_)
-// that evaluate to a concrete mutex object whenever possible. If the mutex
-// you want to refer to is not in scope, you may use a member pointer
-// (e.g. &MyClass::mutex_) to refer to a mutex in some (unknown) object.
-
-#ifndef ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_
-#define ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_
-
-#if defined(__clang__)
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)   __attribute__((x))
-#else
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)   // no-op
-#endif
-
-// GUARDED_BY()
-//
-// Documents if a shared field or global variable needs to be protected by a
-// mutex. GUARDED_BY() allows the user to specify a particular mutex that
-// should be held when accessing the annotated variable.
-//
-// Although this annotation (and PT_GUARDED_BY, below) cannot be applied to
-// local variables, a local variable and its associated mutex can often be
-// combined into a small class or struct, thereby allowing the annotation.
-//
-// Example:
-//
-//   class Foo {
-//     Mutex mu_;
-//     int p1_ GUARDED_BY(mu_);
-//     ...
-//   };
-#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
-
-// PT_GUARDED_BY()
-//
-// Documents if the memory location pointed to by a pointer should be guarded
-// by a mutex when dereferencing the pointer.
-//
-// Example:
-//   class Foo {
-//     Mutex mu_;
-//     int *p1_ PT_GUARDED_BY(mu_);
-//     ...
-//   };
-//
-// Note that a pointer variable to a shared memory location could itself be a
-// shared variable.
-//
-// Example:
-//
-//   // `q_`, guarded by `mu1_`, points to a shared memory location that is
-//   // guarded by `mu2_`:
-//   int *q_ GUARDED_BY(mu1_) PT_GUARDED_BY(mu2_);
-#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
-
-// ACQUIRED_AFTER() / ACQUIRED_BEFORE()
-//
-// Documents the acquisition order between locks that can be held
-// simultaneously by a thread. For any two locks that need to be annotated
-// to establish an acquisition order, only one of them needs the annotation.
-// (i.e. You don't have to annotate both locks with both ACQUIRED_AFTER
-// and ACQUIRED_BEFORE.)
-//
-// As with GUARDED_BY, this is only applicable to mutexes that are shared
-// fields or global variables.
-//
-// Example:
-//
-//   Mutex m1_;
-//   Mutex m2_ ACQUIRED_AFTER(m1_);
-#define ACQUIRED_AFTER(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
-
-#define ACQUIRED_BEFORE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
-
-// EXCLUSIVE_LOCKS_REQUIRED() / SHARED_LOCKS_REQUIRED()
-//
-// Documents a function that expects a mutex to be held prior to entry.
-// The mutex is expected to be held both on entry to, and exit from, the
-// function.
-//
-// An exclusive lock allows read-write access to the guarded data member(s), and
-// only one thread can acquire a lock exclusively at any one time. A shared lock
-// allows read-only access, and any number of threads can acquire a shared lock
-// concurrently.
-//
-// Generally, non-const methods should be annotated with
-// EXCLUSIVE_LOCKS_REQUIRED, while const methods should be annotated with
-// SHARED_LOCKS_REQUIRED.
-//
-// Example:
-//
-//   Mutex mu1, mu2;
-//   int a GUARDED_BY(mu1);
-//   int b GUARDED_BY(mu2);
-//
-//   void foo() EXCLUSIVE_LOCKS_REQUIRED(mu1, mu2) { ... }
-//   void bar() const SHARED_LOCKS_REQUIRED(mu1, mu2) { ... }
-#define EXCLUSIVE_LOCKS_REQUIRED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_locks_required(__VA_ARGS__))
-
-#define SHARED_LOCKS_REQUIRED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(shared_locks_required(__VA_ARGS__))
-
-// LOCKS_EXCLUDED()
-//
-// Documents the locks acquired in the body of the function. These locks
-// cannot be held when calling this function (as Abseil's `Mutex` locks are
-// non-reentrant).
-#define LOCKS_EXCLUDED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
-
-// LOCK_RETURNED()
-//
-// Documents a function that returns a mutex without acquiring it.  For example,
-// a public getter method that returns a pointer to a private mutex should
-// be annotated with LOCK_RETURNED.
-#define LOCK_RETURNED(x) \
-  THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
-
-// LOCKABLE
-//
-// Documents if a class/type is a lockable type (such as the `Mutex` class).
-#define LOCKABLE \
-  THREAD_ANNOTATION_ATTRIBUTE__(lockable)
-
-// SCOPED_LOCKABLE
-//
-// Documents if a class does RAII locking (such as the `MutexLock` class).
-// The constructor should use `LOCK_FUNCTION()` to specify the mutex that is
-// acquired, and the destructor should use `UNLOCK_FUNCTION()` with no
-// arguments; the analysis will assume that the destructor unlocks whatever the
-// constructor locked.
-#define SCOPED_LOCKABLE \
-  THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
-
-// EXCLUSIVE_LOCK_FUNCTION()
-//
-// Documents functions that acquire a lock in the body of a function, and do
-// not release it.
-#define EXCLUSIVE_LOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_lock_function(__VA_ARGS__))
-
-// SHARED_LOCK_FUNCTION()
-//
-// Documents functions that acquire a shared (reader) lock in the body of a
-// function, and do not release it.
-#define SHARED_LOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(shared_lock_function(__VA_ARGS__))
-
-// UNLOCK_FUNCTION()
-//
-// Documents functions that expect a lock to be held on entry to the function,
-// and release it in the body of the function.
-#define UNLOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(unlock_function(__VA_ARGS__))
-
-// EXCLUSIVE_TRYLOCK_FUNCTION() / SHARED_TRYLOCK_FUNCTION()
-//
-// Documents functions that try to acquire a lock, and return success or failure
-// (or a non-boolean value that can be interpreted as a boolean).
-// The first argument should be `true` for functions that return `true` on
-// success, or `false` for functions that return `false` on success. The second
-// argument specifies the mutex that is locked on success. If unspecified, this
-// mutex is assumed to be `this`.
-#define EXCLUSIVE_TRYLOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_trylock_function(__VA_ARGS__))
-
-#define SHARED_TRYLOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(shared_trylock_function(__VA_ARGS__))
-
-// ASSERT_EXCLUSIVE_LOCK() / ASSERT_SHARED_LOCK()
-//
-// Documents functions that dynamically check to see if a lock is held, and fail
-// if it is not held.
-#define ASSERT_EXCLUSIVE_LOCK(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(assert_exclusive_lock(__VA_ARGS__))
-
-#define ASSERT_SHARED_LOCK(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_lock(__VA_ARGS__))
-
-// NO_THREAD_SAFETY_ANALYSIS
-//
-// Turns off thread safety checking within the body of a particular function.
-// This annotation is used to mark functions that are known to be correct, but
-// the locking behavior is more complicated than the analyzer can handle.
-#define NO_THREAD_SAFETY_ANALYSIS \
-  THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
-
-//------------------------------------------------------------------------------
-// Tool-Supplied Annotations
-//------------------------------------------------------------------------------
-
-// TS_UNCHECKED should be placed around lock expressions that are not valid
-// C++ syntax, but which are present for documentation purposes.  These
-// annotations will be ignored by the analysis.
-#define TS_UNCHECKED(x) ""
-
-// TS_FIXME is used to mark lock expressions that are not valid C++ syntax.
-// It is used by automated tools to mark and disable invalid expressions.
-// The annotation should either be fixed, or changed to TS_UNCHECKED.
-#define TS_FIXME(x) ""
-
-// Like NO_THREAD_SAFETY_ANALYSIS, this turns off checking within the body of
-// a particular function.  However, this attribute is used to mark functions
-// that are incorrect and need to be fixed.  It is used by automated tools to
-// avoid breaking the build when the analysis is updated.
-// Code owners are expected to eventually fix the routine.
-#define NO_THREAD_SAFETY_ANALYSIS_FIXME  NO_THREAD_SAFETY_ANALYSIS
-
-// Similar to NO_THREAD_SAFETY_ANALYSIS_FIXME, this macro marks a GUARDED_BY
-// annotation that needs to be fixed, because it is producing thread safety
-// warning.  It disables the GUARDED_BY.
-#define GUARDED_BY_FIXME(x)
-
-// Disables warnings for a single read operation.  This can be used to avoid
-// warnings when it is known that the read is not actually involved in a race,
-// but the compiler cannot confirm that.
-#define TS_UNCHECKED_READ(x) thread_safety_analysis::ts_unchecked_read(x)
-
-
-namespace thread_safety_analysis {
-
-// Takes a reference to a guarded data member, and returns an unguarded
-// reference.
-template <typename T>
-inline const T& ts_unchecked_read(const T& v) NO_THREAD_SAFETY_ANALYSIS {
-  return v;
-}
-
-template <typename T>
-inline T& ts_unchecked_read(T& v) NO_THREAD_SAFETY_ANALYSIS {
-  return v;
-}
-
-}  // namespace thread_safety_analysis
-
-#endif  // ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_
diff --git a/third_party/abseil-cpp/absl/base/internal/thread_identity.cc b/third_party/abseil-cpp/absl/base/internal/thread_identity.cc
index 9950e63a79..79853f09f5 100644
--- a/third_party/abseil-cpp/absl/base/internal/thread_identity.cc
+++ b/third_party/abseil-cpp/absl/base/internal/thread_identity.cc
@@ -14,7 +14,7 @@
 
 #include "absl/base/internal/thread_identity.h"
 
-#ifndef _WIN32
+#if !defined(_WIN32) || defined(__MINGW32__)
 #include <pthread.h>
 #include <signal.h>
 #endif
@@ -56,6 +56,7 @@ void AllocateThreadIdentityKey(ThreadIdentityReclaimerFunction reclaimer) {
 // *different* instances of this ptr.
 // Apple platforms have the visibility attribute, but issue a compile warning
 // that protected visibility is unsupported.
+ABSL_CONST_INIT  // Must come before __attribute__((visibility("protected")))
 #if ABSL_HAVE_ATTRIBUTE(visibility) && !defined(__APPLE__)
 __attribute__((visibility("protected")))
 #endif  // ABSL_HAVE_ATTRIBUTE(visibility) && !defined(__APPLE__)
diff --git a/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.cc b/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.cc
index 4d352bd110..b1c396c69c 100644
--- a/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.cc
+++ b/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.cc
@@ -24,8 +24,13 @@
 #ifdef __GLIBC__
 #include <sys/platform/ppc.h>
 #elif defined(__FreeBSD__)
-#include <sys/sysctl.h>
+// clang-format off
+// This order does actually matter =(.
 #include <sys/types.h>
+#include <sys/sysctl.h>
+// clang-format on
+
+#include "absl/base/call_once.h"
 #endif
 #endif
 
@@ -49,12 +54,6 @@ double UnscaledCycleClock::Frequency() {
 
 #elif defined(__x86_64__)
 
-int64_t UnscaledCycleClock::Now() {
-  uint64_t low, high;
-  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
-  return (high << 32) | low;
-}
-
 double UnscaledCycleClock::Frequency() {
   return base_internal::NominalCPUFrequency();
 }
diff --git a/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.h b/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.h
index 681ff8f996..cc1276ba08 100644
--- a/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.h
+++ b/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock.h
@@ -42,49 +42,11 @@
 #include <TargetConditionals.h>
 #endif
 
-#include "absl/base/port.h"
-
-// The following platforms have an implementation of a hardware counter.
-#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \
-    defined(__powerpc__) || defined(__ppc__) || defined(__riscv) ||     \
-    defined(_M_IX86) || defined(_M_X64)
-#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1
-#else
-#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 0
-#endif
-
-// The following platforms often disable access to the hardware
-// counter (through a sandbox) even if the underlying hardware has a
-// usable counter. The CycleTimer interface also requires a *scaled*
-// CycleClock that runs at atleast 1 MHz. We've found some Android
-// ARM64 devices where this is not the case, so we disable it by
-// default on Android ARM64.
-#if defined(__native_client__) ||                      \
-    (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) || \
-    (defined(__ANDROID__) && defined(__aarch64__))
-#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 0
-#else
-#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 1
-#endif
-
-// UnscaledCycleClock is an optional internal feature.
-// Use "#if ABSL_USE_UNSCALED_CYCLECLOCK" to test for its presence.
-// Can be overridden at compile-time via -DABSL_USE_UNSCALED_CYCLECLOCK=0|1
-#if !defined(ABSL_USE_UNSCALED_CYCLECLOCK)
-#define ABSL_USE_UNSCALED_CYCLECLOCK               \
-  (ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION && \
-   ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT)
-#endif
+#include "absl/base/config.h"
+#include "absl/base/internal/unscaledcycleclock_config.h"
 
 #if ABSL_USE_UNSCALED_CYCLECLOCK
 
-// This macro can be used to test if UnscaledCycleClock::Frequency()
-// is NominalCPUFrequency() on a particular platform.
-#if (defined(__i386__) || defined(__x86_64__) || defined(__riscv) || \
-     defined(_M_IX86) || defined(_M_X64))
-#define ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
-#endif
-
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace time_internal {
@@ -115,6 +77,16 @@ class UnscaledCycleClock {
   friend class base_internal::UnscaledCycleClockWrapperForInitializeFrequency;
 };
 
+#if defined(__x86_64__)
+
+inline int64_t UnscaledCycleClock::Now() {
+  uint64_t low, high;
+  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
+  return static_cast<int64_t>((high << 32) | low);
+}
+
+#endif
+
 }  // namespace base_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock_config.h b/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock_config.h
new file mode 100644
index 0000000000..24b324ac99
--- /dev/null
+++ b/third_party/abseil-cpp/absl/base/internal/unscaledcycleclock_config.h
@@ -0,0 +1,62 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_CONFIG_H_
+#define ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_CONFIG_H_
+
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
+// The following platforms have an implementation of a hardware counter.
+#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \
+    defined(__powerpc__) || defined(__ppc__) || defined(__riscv) ||     \
+    defined(_M_IX86) || (defined(_M_X64) && !defined(_M_ARM64EC))
+#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1
+#else
+#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 0
+#endif
+
+// The following platforms often disable access to the hardware
+// counter (through a sandbox) even if the underlying hardware has a
+// usable counter. The CycleTimer interface also requires a *scaled*
+// CycleClock that runs at atleast 1 MHz. We've found some Android
+// ARM64 devices where this is not the case, so we disable it by
+// default on Android ARM64.
+#if defined(__native_client__) || (defined(__APPLE__)) || \
+    (defined(__ANDROID__) && defined(__aarch64__))
+#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 0
+#else
+#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 1
+#endif
+
+// UnscaledCycleClock is an optional internal feature.
+// Use "#if ABSL_USE_UNSCALED_CYCLECLOCK" to test for its presence.
+// Can be overridden at compile-time via -DABSL_USE_UNSCALED_CYCLECLOCK=0|1
+#if !defined(ABSL_USE_UNSCALED_CYCLECLOCK)
+#define ABSL_USE_UNSCALED_CYCLECLOCK               \
+  (ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION && \
+   ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT)
+#endif
+
+#if ABSL_USE_UNSCALED_CYCLECLOCK
+// This macro can be used to test if UnscaledCycleClock::Frequency()
+// is NominalCPUFrequency() on a particular platform.
+#if (defined(__i386__) || defined(__x86_64__) || defined(__riscv) || \
+     defined(_M_IX86) || defined(_M_X64))
+#define ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
+#endif
+#endif
+
+#endif  // ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_CONFIG_H_
diff --git a/third_party/abseil-cpp/absl/base/invoke_test.cc b/third_party/abseil-cpp/absl/base/invoke_test.cc
index bcdef36c3b..7be26f649f 100644
--- a/third_party/abseil-cpp/absl/base/invoke_test.cc
+++ b/third_party/abseil-cpp/absl/base/invoke_test.cc
@@ -31,6 +31,14 @@ namespace {
 
 int Function(int a, int b) { return a - b; }
 
+void VoidFunction(int& a, int& b) {
+  a += b;
+  b = a - b;
+  a -= b;
+}
+
+int ZeroArgFunction() { return -1937; }
+
 int Sink(std::unique_ptr<int> p) {
   return *p;
 }
@@ -223,6 +231,100 @@ TEST(InvokeTest, SfinaeFriendly) {
   EXPECT_THAT(CallMaybeWithArg(Factory), ::testing::Pointee(42));
 }
 
+TEST(IsInvocableRTest, CallableExactMatch) {
+  static_assert(
+      base_internal::is_invocable_r<int, decltype(Function), int, int>::value,
+      "Should be true for exact match of types on a free function");
+}
+
+TEST(IsInvocableRTest, CallableArgumentConversionMatch) {
+  static_assert(
+      base_internal::is_invocable_r<int, decltype(Function), char, int>::value,
+      "Should be true for convertible argument type");
+}
+
+TEST(IsInvocableRTest, CallableReturnConversionMatch) {
+  static_assert(base_internal::is_invocable_r<double, decltype(Function), int,
+                                              int>::value,
+                "Should be true for convertible return type");
+}
+
+TEST(IsInvocableRTest, CallableReturnVoid) {
+  static_assert(base_internal::is_invocable_r<void, decltype(VoidFunction),
+                                              int&, int&>::value,
+                "Should be true for void expected and actual return types");
+  static_assert(
+      base_internal::is_invocable_r<void, decltype(Function), int, int>::value,
+      "Should be true for void expected and non-void actual return types");
+}
+
+TEST(IsInvocableRTest, CallableRefQualifierMismatch) {
+  static_assert(!base_internal::is_invocable_r<void, decltype(VoidFunction),
+                                               int&, const int&>::value,
+                "Should be false for reference constness mismatch");
+  static_assert(!base_internal::is_invocable_r<void, decltype(VoidFunction),
+                                               int&&, int&>::value,
+                "Should be false for reference value category mismatch");
+}
+
+TEST(IsInvocableRTest, CallableArgumentTypeMismatch) {
+  static_assert(!base_internal::is_invocable_r<int, decltype(Function),
+                                               std::string, int>::value,
+                "Should be false for argument type mismatch");
+}
+
+TEST(IsInvocableRTest, CallableReturnTypeMismatch) {
+  static_assert(!base_internal::is_invocable_r<std::string, decltype(Function),
+                                               int, int>::value,
+                "Should be false for return type mismatch");
+}
+
+TEST(IsInvocableRTest, CallableTooFewArgs) {
+  static_assert(
+      !base_internal::is_invocable_r<int, decltype(Function), int>::value,
+      "Should be false for too few arguments");
+}
+
+TEST(IsInvocableRTest, CallableTooManyArgs) {
+  static_assert(!base_internal::is_invocable_r<int, decltype(Function), int,
+                                               int, int>::value,
+                "Should be false for too many arguments");
+}
+
+TEST(IsInvocableRTest, MemberFunctionAndReference) {
+  static_assert(base_internal::is_invocable_r<int, decltype(&Class::Method),
+                                              Class&, int, int>::value,
+                "Should be true for exact match of types on a member function "
+                "and class reference");
+}
+
+TEST(IsInvocableRTest, MemberFunctionAndPointer) {
+  static_assert(base_internal::is_invocable_r<int, decltype(&Class::Method),
+                                              Class*, int, int>::value,
+                "Should be true for exact match of types on a member function "
+                "and class pointer");
+}
+
+TEST(IsInvocableRTest, DataMemberAndReference) {
+  static_assert(base_internal::is_invocable_r<int, decltype(&Class::member),
+                                              Class&>::value,
+                "Should be true for exact match of types on a data member and "
+                "class reference");
+}
+
+TEST(IsInvocableRTest, DataMemberAndPointer) {
+  static_assert(base_internal::is_invocable_r<int, decltype(&Class::member),
+                                              Class*>::value,
+                "Should be true for exact match of types on a data member and "
+                "class pointer");
+}
+
+TEST(IsInvocableRTest, CallableZeroArgs) {
+  static_assert(
+      base_internal::is_invocable_r<int, decltype(ZeroArgFunction)>::value,
+      "Should be true for exact match for a zero-arg free function");
+}
+
 }  // namespace
 }  // namespace base_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/base/log_severity.cc b/third_party/abseil-cpp/absl/base/log_severity.cc
index 72312afd36..60a8fc1f89 100644
--- a/third_party/abseil-cpp/absl/base/log_severity.cc
+++ b/third_party/abseil-cpp/absl/base/log_severity.cc
@@ -16,6 +16,8 @@
 
 #include <ostream>
 
+#include "absl/base/attributes.h"
+
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
@@ -23,5 +25,31 @@ std::ostream& operator<<(std::ostream& os, absl::LogSeverity s) {
   if (s == absl::NormalizeLogSeverity(s)) return os << absl::LogSeverityName(s);
   return os << "absl::LogSeverity(" << static_cast<int>(s) << ")";
 }
+
+std::ostream& operator<<(std::ostream& os, absl::LogSeverityAtLeast s) {
+  switch (s) {
+    case absl::LogSeverityAtLeast::kInfo:
+    case absl::LogSeverityAtLeast::kWarning:
+    case absl::LogSeverityAtLeast::kError:
+    case absl::LogSeverityAtLeast::kFatal:
+      return os << ">=" << static_cast<absl::LogSeverity>(s);
+    case absl::LogSeverityAtLeast::kInfinity:
+      return os << "INFINITY";
+  }
+  return os;
+}
+
+std::ostream& operator<<(std::ostream& os, absl::LogSeverityAtMost s) {
+  switch (s) {
+    case absl::LogSeverityAtMost::kInfo:
+    case absl::LogSeverityAtMost::kWarning:
+    case absl::LogSeverityAtMost::kError:
+    case absl::LogSeverityAtMost::kFatal:
+      return os << "<=" << static_cast<absl::LogSeverity>(s);
+    case absl::LogSeverityAtMost::kNegativeInfinity:
+      return os << "NEGATIVE_INFINITY";
+  }
+  return os;
+}
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/base/log_severity.h b/third_party/abseil-cpp/absl/base/log_severity.h
index 2236422462..8bdca38b5f 100644
--- a/third_party/abseil-cpp/absl/base/log_severity.h
+++ b/third_party/abseil-cpp/absl/base/log_severity.h
@@ -115,6 +115,57 @@ constexpr absl::LogSeverity NormalizeLogSeverity(int s) {
 // unspecified; do not rely on it.
 std::ostream& operator<<(std::ostream& os, absl::LogSeverity s);
 
+// Enums representing a lower bound for LogSeverity. APIs that only operate on
+// messages of at least a certain level (for example, `SetMinLogLevel()`) use
+// this type to specify that level. absl::LogSeverityAtLeast::kInfinity is
+// a level above all threshold levels and therefore no log message will
+// ever meet this threshold.
+enum class LogSeverityAtLeast : int {
+  kInfo = static_cast<int>(absl::LogSeverity::kInfo),
+  kWarning = static_cast<int>(absl::LogSeverity::kWarning),
+  kError = static_cast<int>(absl::LogSeverity::kError),
+  kFatal = static_cast<int>(absl::LogSeverity::kFatal),
+  kInfinity = 1000,
+};
+
+std::ostream& operator<<(std::ostream& os, absl::LogSeverityAtLeast s);
+
+// Enums representing an upper bound for LogSeverity. APIs that only operate on
+// messages of at most a certain level (for example, buffer all messages at or
+// below a certain level) use this type to specify that level.
+// absl::LogSeverityAtMost::kNegativeInfinity is a level below all threshold
+// levels and therefore will exclude all log messages.
+enum class LogSeverityAtMost : int {
+  kNegativeInfinity = -1000,
+  kInfo = static_cast<int>(absl::LogSeverity::kInfo),
+  kWarning = static_cast<int>(absl::LogSeverity::kWarning),
+  kError = static_cast<int>(absl::LogSeverity::kError),
+  kFatal = static_cast<int>(absl::LogSeverity::kFatal),
+};
+
+std::ostream& operator<<(std::ostream& os, absl::LogSeverityAtMost s);
+
+#define COMPOP(op1, op2, T)                                         \
+  constexpr bool operator op1(absl::T lhs, absl::LogSeverity rhs) { \
+    return static_cast<absl::LogSeverity>(lhs) op1 rhs;             \
+  }                                                                 \
+  constexpr bool operator op2(absl::LogSeverity lhs, absl::T rhs) { \
+    return lhs op2 static_cast<absl::LogSeverity>(rhs);             \
+  }
+
+// Comparisons between `LogSeverity` and `LogSeverityAtLeast`/
+// `LogSeverityAtMost` are only supported in one direction.
+// Valid checks are:
+//   LogSeverity >= LogSeverityAtLeast
+//   LogSeverity < LogSeverityAtLeast
+//   LogSeverity <= LogSeverityAtMost
+//   LogSeverity > LogSeverityAtMost
+COMPOP(>, <, LogSeverityAtLeast)
+COMPOP(<=, >=, LogSeverityAtLeast)
+COMPOP(<, >, LogSeverityAtMost)
+COMPOP(>=, <=, LogSeverityAtMost)
+#undef COMPOP
+
 ABSL_NAMESPACE_END
 }  // namespace absl
 
diff --git a/third_party/abseil-cpp/absl/base/log_severity_test.cc b/third_party/abseil-cpp/absl/base/log_severity_test.cc
index 55b26d1774..16091a5bea 100644
--- a/third_party/abseil-cpp/absl/base/log_severity_test.cc
+++ b/third_party/abseil-cpp/absl/base/log_severity_test.cc
@@ -35,7 +35,8 @@ using ::testing::IsTrue;
 using ::testing::TestWithParam;
 using ::testing::Values;
 
-std::string StreamHelper(absl::LogSeverity value) {
+template <typename T>
+std::string StreamHelper(T value) {
   std::ostringstream stream;
   stream << value;
   return stream.str();
@@ -201,4 +202,44 @@ TEST_P(UnparseFlagToOtherIntegerTest, ReturnsExpectedValueAndRoundTrips) {
               IsTrue());
   EXPECT_THAT(reparsed_value, Eq(to_unparse));
 }
+
+TEST(LogThresholdTest, LogSeverityAtLeastTest) {
+  EXPECT_LT(absl::LogSeverity::kError, absl::LogSeverityAtLeast::kFatal);
+  EXPECT_GT(absl::LogSeverityAtLeast::kError, absl::LogSeverity::kInfo);
+
+  EXPECT_LE(absl::LogSeverityAtLeast::kInfo, absl::LogSeverity::kError);
+  EXPECT_GE(absl::LogSeverity::kError, absl::LogSeverityAtLeast::kInfo);
+}
+
+TEST(LogThresholdTest, LogSeverityAtMostTest) {
+  EXPECT_GT(absl::LogSeverity::kError, absl::LogSeverityAtMost::kWarning);
+  EXPECT_LT(absl::LogSeverityAtMost::kError, absl::LogSeverity::kFatal);
+
+  EXPECT_GE(absl::LogSeverityAtMost::kFatal, absl::LogSeverity::kError);
+  EXPECT_LE(absl::LogSeverity::kWarning, absl::LogSeverityAtMost::kError);
+}
+
+TEST(LogThresholdTest, Extremes) {
+  EXPECT_LT(absl::LogSeverity::kFatal, absl::LogSeverityAtLeast::kInfinity);
+  EXPECT_GT(absl::LogSeverity::kInfo,
+            absl::LogSeverityAtMost::kNegativeInfinity);
+}
+
+TEST(LogThresholdTest, Output) {
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtLeast::kInfo), Eq(">=INFO"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtLeast::kWarning),
+              Eq(">=WARNING"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtLeast::kError), Eq(">=ERROR"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtLeast::kFatal), Eq(">=FATAL"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtLeast::kInfinity),
+              Eq("INFINITY"));
+
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtMost::kInfo), Eq("<=INFO"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtMost::kWarning), Eq("<=WARNING"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtMost::kError), Eq("<=ERROR"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtMost::kFatal), Eq("<=FATAL"));
+  EXPECT_THAT(StreamHelper(absl::LogSeverityAtMost::kNegativeInfinity),
+              Eq("NEGATIVE_INFINITY"));
+}
+
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/base/optimization.h b/third_party/abseil-cpp/absl/base/optimization.h
index d090be1286..d706100cca 100644
--- a/third_party/abseil-cpp/absl/base/optimization.h
+++ b/third_party/abseil-cpp/absl/base/optimization.h
@@ -91,6 +91,7 @@
 #define ABSL_CACHELINE_SIZE 64
 #endif
 #endif
+#endif
 
 #ifndef ABSL_CACHELINE_SIZE
 // A reasonable default guess.  Note that overestimates tend to waste more
@@ -141,12 +142,11 @@
 //    the generated machine code.
 // 3) Prefer applying this attribute to individual variables. Avoid
 //    applying it to types. This tends to localize the effect.
+#if defined(__clang__) || defined(__GNUC__)
 #define ABSL_CACHELINE_ALIGNED __attribute__((aligned(ABSL_CACHELINE_SIZE)))
 #elif defined(_MSC_VER)
-#define ABSL_CACHELINE_SIZE 64
 #define ABSL_CACHELINE_ALIGNED __declspec(align(ABSL_CACHELINE_SIZE))
 #else
-#define ABSL_CACHELINE_SIZE 64
 #define ABSL_CACHELINE_ALIGNED
 #endif
 
@@ -181,35 +181,43 @@
 #define ABSL_PREDICT_TRUE(x) (x)
 #endif
 
-// ABSL_INTERNAL_ASSUME(cond)
+// ABSL_ASSUME(cond)
+//
 // Informs the compiler that a condition is always true and that it can assume
-// it to be true for optimization purposes. The call has undefined behavior if
-// the condition is false.
+// it to be true for optimization purposes.
+//
+// WARNING: If the condition is false, the program can produce undefined and
+// potentially dangerous behavior.
+//
 // In !NDEBUG mode, the condition is checked with an assert().
-// NOTE: The expression must not have side effects, as it will only be evaluated
-// in some compilation modes and not others.
+//
+// NOTE: The expression must not have side effects, as it may only be evaluated
+// in some compilation modes and not others. Some compilers may issue a warning
+// if the compiler cannot prove the expression has no side effects. For example,
+// the expression should not use a function call since the compiler cannot prove
+// that a function call does not have side effects.
 //
 // Example:
 //
 //   int x = ...;
-//   ABSL_INTERNAL_ASSUME(x >= 0);
+//   ABSL_ASSUME(x >= 0);
 //   // The compiler can optimize the division to a simple right shift using the
 //   // assumption specified above.
 //   int y = x / 16;
 //
 #if !defined(NDEBUG)
-#define ABSL_INTERNAL_ASSUME(cond) assert(cond)
+#define ABSL_ASSUME(cond) assert(cond)
 #elif ABSL_HAVE_BUILTIN(__builtin_assume)
-#define ABSL_INTERNAL_ASSUME(cond) __builtin_assume(cond)
+#define ABSL_ASSUME(cond) __builtin_assume(cond)
 #elif defined(__GNUC__) || ABSL_HAVE_BUILTIN(__builtin_unreachable)
-#define ABSL_INTERNAL_ASSUME(cond)        \
+#define ABSL_ASSUME(cond)                 \
   do {                                    \
     if (!(cond)) __builtin_unreachable(); \
   } while (0)
 #elif defined(_MSC_VER)
-#define ABSL_INTERNAL_ASSUME(cond) __assume(cond)
+#define ABSL_ASSUME(cond) __assume(cond)
 #else
-#define ABSL_INTERNAL_ASSUME(cond)      \
+#define ABSL_ASSUME(cond)               \
   do {                                  \
     static_cast<void>(false && (cond)); \
   } while (0)
diff --git a/third_party/abseil-cpp/absl/base/options.h b/third_party/abseil-cpp/absl/base/options.h
index 56b4e36ee0..9a15f2afa5 100644
--- a/third_party/abseil-cpp/absl/base/options.h
+++ b/third_party/abseil-cpp/absl/base/options.h
@@ -67,12 +67,6 @@
 #ifndef ABSL_BASE_OPTIONS_H_
 #define ABSL_BASE_OPTIONS_H_
 
-// Include a standard library header to allow configuration based on the
-// standard library in use.
-#ifdef __cplusplus
-#include <ciso646>
-#endif
-
 // -----------------------------------------------------------------------------
 // Type Compatibility Options
 // -----------------------------------------------------------------------------
@@ -100,7 +94,7 @@
 // User code should not inspect this macro.  To check in the preprocessor if
 // absl::any is a typedef of std::any, use the feature macro ABSL_USES_STD_ANY.
 
-#define ABSL_OPTION_USE_STD_ANY 2
+#define ABSL_OPTION_USE_STD_ANY 0
 
 
 // ABSL_OPTION_USE_STD_OPTIONAL
@@ -127,7 +121,7 @@
 // absl::optional is a typedef of std::optional, use the feature macro
 // ABSL_USES_STD_OPTIONAL.
 
-#define ABSL_OPTION_USE_STD_OPTIONAL 2
+#define ABSL_OPTION_USE_STD_OPTIONAL 0
 
 
 // ABSL_OPTION_USE_STD_STRING_VIEW
@@ -154,7 +148,7 @@
 // absl::string_view is a typedef of std::string_view, use the feature macro
 // ABSL_USES_STD_STRING_VIEW.
 
-#define ABSL_OPTION_USE_STD_STRING_VIEW 2
+#define ABSL_OPTION_USE_STD_STRING_VIEW 0
 
 // ABSL_OPTION_USE_STD_VARIANT
 //
@@ -180,7 +174,7 @@
 // absl::variant is a typedef of std::variant, use the feature macro
 // ABSL_USES_STD_VARIANT.
 
-#define ABSL_OPTION_USE_STD_VARIANT 2
+#define ABSL_OPTION_USE_STD_VARIANT 0
 
 
 // ABSL_OPTION_USE_INLINE_NAMESPACE
@@ -205,8 +199,8 @@
 // be changed to a new, unique identifier name.  In particular "head" is not
 // allowed.
 
-#define ABSL_OPTION_USE_INLINE_NAMESPACE 1
-#define ABSL_OPTION_INLINE_NAMESPACE_NAME lts_20211102
+#define ABSL_OPTION_USE_INLINE_NAMESPACE 0
+#define ABSL_OPTION_INLINE_NAMESPACE_NAME head
 
 // ABSL_OPTION_HARDENED
 //
@@ -233,6 +227,6 @@
 // checks enabled by this option may abort the program in a different way and
 // log additional information when `NDEBUG` is not defined.
 
-#define ABSL_OPTION_HARDENED 0
+#define ABSL_OPTION_HARDENED 1
 
 #endif  // ABSL_BASE_OPTIONS_H_
diff --git a/third_party/abseil-cpp/absl/base/policy_checks.h b/third_party/abseil-cpp/absl/base/policy_checks.h
index 06b3243916..2626fb6a36 100644
--- a/third_party/abseil-cpp/absl/base/policy_checks.h
+++ b/third_party/abseil-cpp/absl/base/policy_checks.h
@@ -44,17 +44,17 @@
 // Toolchain Check
 // -----------------------------------------------------------------------------
 
-// We support MSVC++ 14.0 update 2 and later.
+// We support Visual Studio 2017 (MSVC++ 15.0) and later.
 // This minimum will go up.
-#if defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190023918 && !defined(__clang__)
-#error "This package requires Visual Studio 2015 Update 2 or higher."
+#if defined(_MSC_VER) && _MSC_VER < 1910 && !defined(__clang__)
+#error "This package requires Visual Studio 2017 (MSVC++ 15.0) or higher."
 #endif
 
-// We support gcc 4.7 and later.
+// We support gcc 5 and later.
 // This minimum will go up.
 #if defined(__GNUC__) && !defined(__clang__)
-#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
-#error "This package requires gcc 4.7 or higher."
+#if __GNUC__ < 5
+#error "This package requires gcc 5 or higher."
 #endif
 #endif
 
@@ -69,13 +69,15 @@
 // C++ Version Check
 // -----------------------------------------------------------------------------
 
-// Enforce C++11 as the minimum.  Note that Visual Studio has not
-// advanced __cplusplus despite being good enough for our purposes, so
-// so we exempt it from the check.
-#if defined(__cplusplus) && !defined(_MSC_VER)
-#if __cplusplus < 201103L
-#error "C++ versions less than C++11 are not supported."
-#endif
+// Enforce C++14 as the minimum.
+#if defined(_MSVC_LANG)
+#if _MSVC_LANG < 201402L
+#error "C++ versions less than C++14 are not supported."
+#endif  // _MSVC_LANG < 201402L
+#elif defined(__cplusplus)
+#if __cplusplus < 201402L
+#error "C++ versions less than C++14 are not supported."
+#endif  // __cplusplus < 201402L
 #endif
 
 // -----------------------------------------------------------------------------
diff --git a/third_party/abseil-cpp/absl/base/spinlock_test_common.cc b/third_party/abseil-cpp/absl/base/spinlock_test_common.cc
index 2b572c5b3f..52ecf58012 100644
--- a/third_party/abseil-cpp/absl/base/spinlock_test_common.cc
+++ b/third_party/abseil-cpp/absl/base/spinlock_test_common.cc
@@ -34,7 +34,7 @@
 #include "absl/synchronization/blocking_counter.h"
 #include "absl/synchronization/notification.h"
 
-constexpr int32_t kNumThreads = 10;
+constexpr uint32_t kNumThreads = 10;
 constexpr int32_t kIters = 1000;
 
 namespace absl {
@@ -48,14 +48,14 @@ struct SpinLockTest {
                                    int64_t wait_end_time) {
     return SpinLock::EncodeWaitCycles(wait_start_time, wait_end_time);
   }
-  static uint64_t DecodeWaitCycles(uint32_t lock_value) {
+  static int64_t DecodeWaitCycles(uint32_t lock_value) {
     return SpinLock::DecodeWaitCycles(lock_value);
   }
 };
 
 namespace {
 
-static constexpr int kArrayLength = 10;
+static constexpr size_t kArrayLength = 10;
 static uint32_t values[kArrayLength];
 
 ABSL_CONST_INIT static SpinLock static_cooperative_spinlock(
@@ -79,11 +79,11 @@ static uint32_t Hash32(uint32_t a, uint32_t c) {
   return c;
 }
 
-static void TestFunction(int thread_salt, SpinLock* spinlock) {
+static void TestFunction(uint32_t thread_salt, SpinLock* spinlock) {
   for (int i = 0; i < kIters; i++) {
     SpinLockHolder h(spinlock);
-    for (int j = 0; j < kArrayLength; j++) {
-      const int index = (j + thread_salt) % kArrayLength;
+    for (size_t j = 0; j < kArrayLength; j++) {
+      const size_t index = (j + thread_salt) % kArrayLength;
       values[index] = Hash32(values[index], thread_salt);
       std::this_thread::yield();
     }
@@ -93,7 +93,7 @@ static void TestFunction(int thread_salt, SpinLock* spinlock) {
 static void ThreadedTest(SpinLock* spinlock) {
   std::vector<std::thread> threads;
   threads.reserve(kNumThreads);
-  for (int i = 0; i < kNumThreads; ++i) {
+  for (uint32_t i = 0; i < kNumThreads; ++i) {
     threads.push_back(std::thread(TestFunction, i, spinlock));
   }
   for (auto& thread : threads) {
@@ -101,7 +101,7 @@ static void ThreadedTest(SpinLock* spinlock) {
   }
 
   SpinLockHolder h(spinlock);
-  for (int i = 1; i < kArrayLength; i++) {
+  for (size_t i = 1; i < kArrayLength; i++) {
     EXPECT_EQ(values[0], values[i]);
   }
 }
@@ -133,28 +133,28 @@ TEST(SpinLock, WaitCyclesEncoding) {
   // but the lower kProfileTimestampShift will be dropped.
   const int kMaxCyclesShift =
     32 - kLockwordReservedShift + kProfileTimestampShift;
-  const uint64_t kMaxCycles = (int64_t{1} << kMaxCyclesShift) - 1;
+  const int64_t kMaxCycles = (int64_t{1} << kMaxCyclesShift) - 1;
 
   // These bits should be zero after encoding.
   const uint32_t kLockwordReservedMask = (1 << kLockwordReservedShift) - 1;
 
   // These bits are dropped when wait cycles are encoded.
-  const uint64_t kProfileTimestampMask = (1 << kProfileTimestampShift) - 1;
+  const int64_t kProfileTimestampMask = (1 << kProfileTimestampShift) - 1;
 
   // Test a bunch of random values
   std::default_random_engine generator;
   // Shift to avoid overflow below.
-  std::uniform_int_distribution<uint64_t> time_distribution(
-      0, std::numeric_limits<uint64_t>::max() >> 4);
-  std::uniform_int_distribution<uint64_t> cycle_distribution(0, kMaxCycles);
+  std::uniform_int_distribution<int64_t> time_distribution(
+      0, std::numeric_limits<int64_t>::max() >> 3);
+  std::uniform_int_distribution<int64_t> cycle_distribution(0, kMaxCycles);
 
   for (int i = 0; i < 100; i++) {
     int64_t start_time = time_distribution(generator);
     int64_t cycles = cycle_distribution(generator);
     int64_t end_time = start_time + cycles;
     uint32_t lock_value = SpinLockTest::EncodeWaitCycles(start_time, end_time);
-    EXPECT_EQ(0, lock_value & kLockwordReservedMask);
-    uint64_t decoded = SpinLockTest::DecodeWaitCycles(lock_value);
+    EXPECT_EQ(0u, lock_value & kLockwordReservedMask);
+    int64_t decoded = SpinLockTest::DecodeWaitCycles(lock_value);
     EXPECT_EQ(0, decoded & kProfileTimestampMask);
     EXPECT_EQ(cycles & ~kProfileTimestampMask, decoded);
   }
@@ -178,21 +178,21 @@ TEST(SpinLock, WaitCyclesEncoding) {
   // Test clamping
   uint32_t max_value =
     SpinLockTest::EncodeWaitCycles(start_time, start_time + kMaxCycles);
-  uint64_t max_value_decoded = SpinLockTest::DecodeWaitCycles(max_value);
-  uint64_t expected_max_value_decoded = kMaxCycles & ~kProfileTimestampMask;
+  int64_t max_value_decoded = SpinLockTest::DecodeWaitCycles(max_value);
+  int64_t expected_max_value_decoded = kMaxCycles & ~kProfileTimestampMask;
   EXPECT_EQ(expected_max_value_decoded, max_value_decoded);
 
   const int64_t step = (1 << kProfileTimestampShift);
   uint32_t after_max_value =
     SpinLockTest::EncodeWaitCycles(start_time, start_time + kMaxCycles + step);
-  uint64_t after_max_value_decoded =
+  int64_t after_max_value_decoded =
       SpinLockTest::DecodeWaitCycles(after_max_value);
   EXPECT_EQ(expected_max_value_decoded, after_max_value_decoded);
 
   uint32_t before_max_value = SpinLockTest::EncodeWaitCycles(
       start_time, start_time + kMaxCycles - step);
-  uint64_t before_max_value_decoded =
-    SpinLockTest::DecodeWaitCycles(before_max_value);
+  int64_t before_max_value_decoded =
+      SpinLockTest::DecodeWaitCycles(before_max_value);
   EXPECT_GT(expected_max_value_decoded, before_max_value_decoded);
 }
 
diff --git a/third_party/abseil-cpp/absl/base/thread_annotations.h b/third_party/abseil-cpp/absl/base/thread_annotations.h
index 9695f6de67..4a3f3e33e9 100644
--- a/third_party/abseil-cpp/absl/base/thread_annotations.h
+++ b/third_party/abseil-cpp/absl/base/thread_annotations.h
@@ -36,8 +36,6 @@
 
 #include "absl/base/attributes.h"
 #include "absl/base/config.h"
-// TODO(mbonadei): Remove after the backward compatibility period.
-#include "absl/base/internal/thread_annotations.h"  // IWYU pragma: export
 
 // ABSL_GUARDED_BY()
 //
@@ -154,8 +152,8 @@
 
 // ABSL_LOCKS_EXCLUDED()
 //
-// Documents the locks acquired in the body of the function. These locks
-// cannot be held when calling this function (as Abseil's `Mutex` locks are
+// Documents the locks that cannot be held by callers of this function, as they
+// might be acquired by this function (Abseil's `Mutex` locks are
 // non-reentrant).
 #if ABSL_HAVE_ATTRIBUTE(locks_excluded)
 #define ABSL_LOCKS_EXCLUDED(...) __attribute__((locks_excluded(__VA_ARGS__)))
diff --git a/third_party/abseil-cpp/absl/cleanup/BUILD.gn b/third_party/abseil-cpp/absl/cleanup/BUILD.gn
new file mode 100644
index 0000000000..3d3fa88268
--- /dev/null
+++ b/third_party/abseil-cpp/absl/cleanup/BUILD.gn
@@ -0,0 +1,33 @@
+# Copyright 2021 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("cleanup_internal") {
+  public = [ "internal/cleanup.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("cleanup") {
+  public = [ "cleanup.h" ]
+  deps = [
+    ":cleanup_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_test("cleanup_test") {
+  sources = [ "cleanup_test.cc" ]
+  deps = [
+    ":cleanup",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/cleanup/CMakeLists.txt b/third_party/abseil-cpp/absl/cleanup/CMakeLists.txt
index 26a6d0dce3..f5af40b44c 100644
--- a/third_party/abseil-cpp/absl/cleanup/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/cleanup/CMakeLists.txt
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cleanup_internal
diff --git a/third_party/abseil-cpp/absl/container/BUILD.bazel b/third_party/abseil-cpp/absl/container/BUILD.bazel
index ffaee19cdb..70febdda62 100644
--- a/third_party/abseil-cpp/absl/container/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/container/BUILD.bazel
@@ -96,8 +96,9 @@ cc_test(
     ],
 )
 
-cc_test(
+cc_binary(
     name = "fixed_array_benchmark",
+    testonly = 1,
     srcs = ["fixed_array_benchmark.cc"],
     copts = ABSL_TEST_COPTS + ["$(STACK_FRAME_UNLIMITED)"],
     linkopts = ABSL_DEFAULT_LINKOPTS,
@@ -133,6 +134,7 @@ cc_library(
         "//absl/base:core_headers",
         "//absl/base:throw_delegate",
         "//absl/memory",
+        "//absl/meta:type_traits",
     ],
 )
 
@@ -166,8 +168,9 @@ cc_test(
     ],
 )
 
-cc_test(
+cc_binary(
     name = "inlined_vector_benchmark",
+    testonly = 1,
     srcs = ["inlined_vector_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
@@ -217,11 +220,6 @@ cc_test(
     ],
 )
 
-NOTEST_TAGS_NONMOBILE = [
-    "no_test_darwin_x86_64",
-    "no_test_loonix",
-]
-
 NOTEST_TAGS_MOBILE = [
     "no_test_android_arm",
     "no_test_android_arm64",
@@ -229,8 +227,6 @@ NOTEST_TAGS_MOBILE = [
     "no_test_ios_x86_64",
 ]
 
-NOTEST_TAGS = NOTEST_TAGS_MOBILE + NOTEST_TAGS_NONMOBILE
-
 cc_library(
     name = "flat_hash_map",
     hdrs = ["flat_hash_map.h"],
@@ -241,6 +237,7 @@ cc_library(
         ":hash_function_defaults",
         ":raw_hash_map",
         "//absl/algorithm:container",
+        "//absl/base:core_headers",
         "//absl/memory",
     ],
 )
@@ -250,7 +247,7 @@ cc_test(
     srcs = ["flat_hash_map_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":flat_hash_map",
         ":hash_generator_testing",
@@ -284,7 +281,7 @@ cc_test(
     srcs = ["flat_hash_set_test.cc"],
     copts = ABSL_TEST_COPTS + ["-DUNORDERED_SET_CXX17"],
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":flat_hash_set",
         ":hash_generator_testing",
@@ -307,9 +304,10 @@ cc_library(
     deps = [
         ":container_memory",
         ":hash_function_defaults",
-        ":node_hash_policy",
+        ":node_slot_policy",
         ":raw_hash_map",
         "//absl/algorithm:container",
+        "//absl/base:core_headers",
         "//absl/memory",
     ],
 )
@@ -319,7 +317,7 @@ cc_test(
     srcs = ["node_hash_map_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":hash_generator_testing",
         ":node_hash_map",
@@ -339,9 +337,10 @@ cc_library(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_function_defaults",
-        ":node_hash_policy",
+        ":node_slot_policy",
         ":raw_hash_set",
         "//absl/algorithm:container",
+        "//absl/base:core_headers",
         "//absl/memory",
     ],
 )
@@ -351,7 +350,7 @@ cc_test(
     srcs = ["node_hash_set_test.cc"],
     copts = ABSL_TEST_COPTS + ["-DUNORDERED_SET_CXX17"],
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":node_hash_set",
         ":unordered_set_constructor_test",
@@ -380,7 +379,7 @@ cc_test(
     srcs = ["internal/container_memory_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":container_memory",
         ":test_instance_tracker",
@@ -407,7 +406,7 @@ cc_test(
     srcs = ["internal/hash_function_defaults_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS,
+    tags = NOTEST_TAGS_MOBILE + ["no_test_loonix"],
     deps = [
         ":hash_function_defaults",
         "//absl/hash",
@@ -462,7 +461,10 @@ cc_library(
     hdrs = ["internal/hash_policy_traits.h"],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/meta:type_traits"],
+    deps = [
+        ":common_policy_traits",
+        "//absl/meta:type_traits",
+    ],
 )
 
 cc_test(
@@ -477,6 +479,26 @@ cc_test(
 )
 
 cc_library(
+    name = "common_policy_traits",
+    hdrs = ["internal/common_policy_traits.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = ["//visibility:private"],
+    deps = ["//absl/meta:type_traits"],
+)
+
+cc_test(
+    name = "common_policy_traits_test",
+    srcs = ["internal/common_policy_traits_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":common_policy_traits",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_library(
     name = "hashtable_debug",
     hdrs = ["internal/hashtable_debug.h"],
     copts = ABSL_DEFAULT_COPTS,
@@ -506,8 +528,8 @@ cc_library(
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
-        ":have_sse",
         "//absl/base",
+        "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/debugging:stacktrace",
         "//absl/memory",
@@ -522,9 +544,12 @@ cc_test(
     name = "hashtablez_sampler_test",
     srcs = ["internal/hashtablez_sampler_test.cc"],
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":hashtablez_sampler",
-        ":have_sse",
+        "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/profiling:sample_recorder",
         "//absl/synchronization",
@@ -535,21 +560,21 @@ cc_test(
 )
 
 cc_library(
-    name = "node_hash_policy",
-    hdrs = ["internal/node_hash_policy.h"],
+    name = "node_slot_policy",
+    hdrs = ["internal/node_slot_policy.h"],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = ["//absl/base:config"],
 )
 
 cc_test(
-    name = "node_hash_policy_test",
-    srcs = ["internal/node_hash_policy_test.cc"],
+    name = "node_slot_policy_test",
+    srcs = ["internal/node_slot_policy_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_policy_traits",
-        ":node_hash_policy",
+        ":node_slot_policy",
         "@com_google_googletest//:gtest_main",
     ],
 )
@@ -567,14 +592,6 @@ cc_library(
 )
 
 cc_library(
-    name = "have_sse",
-    hdrs = ["internal/have_sse.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-)
-
-cc_library(
     name = "common",
     hdrs = ["internal/common.h"],
     copts = ABSL_DEFAULT_COPTS,
@@ -598,10 +615,10 @@ cc_library(
         ":hash_policy_traits",
         ":hashtable_debug_hooks",
         ":hashtablez_sampler",
-        ":have_sse",
         "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/base:endian",
+        "//absl/base:prefetch",
         "//absl/memory",
         "//absl/meta:type_traits",
         "//absl/numeric:bits",
@@ -614,9 +631,15 @@ cc_test(
     srcs = ["internal/raw_hash_set_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkstatic = 1,
-    tags = NOTEST_TAGS,
+    tags = NOTEST_TAGS_MOBILE + [
+        "no_test_loonix",
+        # TODO(b/237097643): investigate race and remove
+        "noarm_gemu",
+    ],
     deps = [
         ":container_memory",
+        ":flat_hash_map",
+        ":flat_hash_set",
         ":hash_function_defaults",
         ":hash_policy_testing",
         ":hashtable_debug",
@@ -624,7 +647,9 @@ cc_test(
         "//absl/base",
         "//absl/base:config",
         "//absl/base:core_headers",
+        "//absl/base:prefetch",
         "//absl/base:raw_logging_internal",
+        "//absl/log",
         "//absl/strings",
         "@com_google_googletest//:gtest_main",
     ],
@@ -704,7 +729,7 @@ cc_test(
     srcs = ["internal/layout_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS,
+    tags = NOTEST_TAGS_MOBILE + ["no_test_loonix"],
     visibility = ["//visibility:private"],
     deps = [
         ":layout",
@@ -851,7 +876,7 @@ cc_test(
     srcs = ["internal/unordered_set_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":unordered_set_constructor_test",
         ":unordered_set_lookup_test",
@@ -866,7 +891,7 @@ cc_test(
     srcs = ["internal/unordered_map_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     deps = [
         ":unordered_map_constructor_test",
         ":unordered_map_lookup_test",
@@ -881,7 +906,7 @@ cc_test(
     srcs = ["sample_element_size_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
+    tags = ["no_test_loonix"],
     visibility = ["//visibility:private"],
     deps = [
         ":flat_hash_map",
@@ -907,10 +932,12 @@ cc_library(
     visibility = ["//visibility:public"],
     deps = [
         ":common",
+        ":common_policy_traits",
         ":compressed_tuple",
         ":container_memory",
         ":layout",
         "//absl/base:core_headers",
+        "//absl/base:raw_logging_internal",
         "//absl/base:throw_delegate",
         "//absl/memory",
         "//absl/meta:type_traits",
@@ -946,18 +973,24 @@ cc_test(
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     shard_count = 10,
+    tags = [
+        "no_test:os:ios",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
     visibility = ["//visibility:private"],
     deps = [
         ":btree",
         ":btree_test_common",
         ":counting_allocator",
         ":test_instance_tracker",
+        "//absl/algorithm:container",
         "//absl/base:core_headers",
         "//absl/base:raw_logging_internal",
         "//absl/flags:flag",
         "//absl/hash:hash_testing",
         "//absl/memory",
-        "//absl/meta:type_traits",
+        "//absl/random",
         "//absl/strings",
         "//absl/types:compare",
         "@com_google_googletest//:gtest_main",
@@ -980,10 +1013,12 @@ cc_binary(
         ":flat_hash_map",
         ":flat_hash_set",
         ":hashtable_debug",
+        "//absl/algorithm:container",
         "//absl/base:raw_logging_internal",
-        "//absl/flags:flag",
         "//absl/hash",
+        "//absl/log",
         "//absl/memory",
+        "//absl/random",
         "//absl/strings:cord",
         "//absl/strings:str_format",
         "//absl/time",
diff --git a/third_party/abseil-cpp/absl/container/BUILD.gn b/third_party/abseil-cpp/absl/container/BUILD.gn
new file mode 100644
index 0000000000..c01011f7e5
--- /dev/null
+++ b/third_party/abseil-cpp/absl/container/BUILD.gn
@@ -0,0 +1,401 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("compressed_tuple") {
+  public = [ "internal/compressed_tuple.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/utility" ]
+}
+
+absl_source_set("fixed_array") {
+  public = [ "fixed_array.h" ]
+  deps = [
+    ":compressed_tuple",
+    "//third_party/abseil-cpp/absl/algorithm",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+    "//third_party/abseil-cpp/absl/memory",
+  ]
+}
+
+absl_source_set("inlined_vector_internal") {
+  public = [ "internal/inlined_vector.h" ]
+  deps = [
+    ":compressed_tuple",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("inlined_vector") {
+  public = [ "inlined_vector.h" ]
+  deps = [
+    ":inlined_vector_internal",
+    "//third_party/abseil-cpp/absl/algorithm",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("counting_allocator") {
+  testonly = true
+  public = [ "internal/counting_allocator.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+  visibility = [ ":*" ]
+}
+
+absl_source_set("test_instance_tracker") {
+  testonly = true
+  sources = [ "internal/test_instance_tracker.cc" ]
+  public = [ "internal/test_instance_tracker.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/types:compare" ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("flat_hash_map") {
+  public = [ "flat_hash_map.h" ]
+  deps = [
+    ":container_memory",
+    ":hash_function_defaults",
+    ":raw_hash_map",
+    "//third_party/abseil-cpp/absl/algorithm:container",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+  ]
+}
+
+absl_source_set("flat_hash_set") {
+  public = [ "flat_hash_set.h" ]
+  deps = [
+    ":container_memory",
+    ":hash_function_defaults",
+    ":raw_hash_set",
+    "//third_party/abseil-cpp/absl/algorithm:container",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+  ]
+}
+
+absl_source_set("node_hash_map") {
+  public = [ "node_hash_map.h" ]
+  deps = [
+    ":container_memory",
+    ":hash_function_defaults",
+    ":node_slot_policy",
+    ":raw_hash_map",
+    "//third_party/abseil-cpp/absl/algorithm:container",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+  ]
+}
+
+absl_source_set("node_hash_set") {
+  public = [ "node_hash_set.h" ]
+  deps = [
+    ":container_memory",
+    ":hash_function_defaults",
+    ":node_slot_policy",
+    ":raw_hash_set",
+    "//third_party/abseil-cpp/absl/algorithm:container",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+  ]
+}
+
+absl_source_set("container_memory") {
+  public = [ "internal/container_memory.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("hash_function_defaults") {
+  public = [ "internal/hash_function_defaults.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/hash",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:cord",
+  ]
+}
+
+absl_source_set("hash_generator_testing") {
+  testonly = true
+  sources = [ "internal/hash_generator_testing.cc" ]
+  public = [ "internal/hash_generator_testing.h" ]
+  deps = [
+    ":hash_policy_testing",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("hash_policy_testing") {
+  testonly = true
+  public = [ "internal/hash_policy_testing.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/hash",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("hash_policy_traits") {
+  public = [ "internal/hash_policy_traits.h" ]
+  deps = [
+    ":common_policy_traits",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("common_policy_traits") {
+  public = [ "internal/common_policy_traits.h" ]
+  visibility = [ "//third_party/abseil-cpp/absl/container:*" ]
+  deps = [ "//third_party/abseil-cpp/absl/meta:type_traits" ]
+}
+
+absl_test("common_policy_traits_test") {
+  sources = [ "internal/common_policy_traits_test.cc" ]
+  deps = [ ":common_policy_traits" ]
+}
+
+absl_source_set("hashtable_debug") {
+  public = [ "internal/hashtable_debug.h" ]
+  deps = [ ":hashtable_debug_hooks" ]
+}
+
+absl_source_set("hashtable_debug_hooks") {
+  public = [ "internal/hashtable_debug_hooks.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("hashtablez_sampler") {
+  public = [ "internal/hashtablez_sampler.h" ]
+  sources = [
+    "internal/hashtablez_sampler.cc",
+    "internal/hashtablez_sampler_force_weak_definition.cc",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/debugging:stacktrace",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/profiling:exponential_biased",
+    "//third_party/abseil-cpp/absl/profiling:sample_recorder",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("node_slot_policy") {
+  public = [ "internal/node_slot_policy.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_test("node_slot_policy_test") {
+  sources = [ "internal/node_slot_policy_test.cc" ]
+  deps = [
+    ":hash_policy_traits",
+    ":node_slot_policy",
+  ]
+}
+
+absl_source_set("raw_hash_map") {
+  public = [ "internal/raw_hash_map.h" ]
+  deps = [
+    ":container_memory",
+    ":raw_hash_set",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+  ]
+}
+
+absl_source_set("common") {
+  public = [ "internal/common.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/types:optional",
+  ]
+}
+
+absl_source_set("raw_hash_set") {
+  sources = [ "internal/raw_hash_set.cc" ]
+  public = [ "internal/raw_hash_set.h" ]
+  deps = [
+    ":common",
+    ":compressed_tuple",
+    ":container_memory",
+    ":hash_policy_traits",
+    ":hashtable_debug_hooks",
+    ":hashtablez_sampler",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/base:prefetch",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("layout") {
+  public = [ "internal/layout.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:span",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("tracked") {
+  testonly = true
+  public = [ "internal/tracked.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("unordered_map_constructor_test") {
+  testonly = true
+  public = [ "internal/unordered_map_constructor_test.h" ]
+  deps = [
+    ":hash_generator_testing",
+    ":hash_policy_testing",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_map_lookup_test") {
+  testonly = true
+  public = [ "internal/unordered_map_lookup_test.h" ]
+  deps = [
+    ":hash_generator_testing",
+    ":hash_policy_testing",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_map_modifiers_test") {
+  testonly = true
+  public = [ "internal/unordered_map_modifiers_test.h" ]
+  deps = [
+    ":hash_generator_testing",
+    ":hash_policy_testing",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_set_constructor_test") {
+  testonly = true
+  public = [ "internal/unordered_set_constructor_test.h" ]
+  deps = [
+    ":hash_generator_testing",
+    ":hash_policy_testing",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_set_members_test") {
+  testonly = true
+  public = [ "internal/unordered_set_members_test.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_map_members_test") {
+  testonly = true
+  public = [ "internal/unordered_map_members_test.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_set_lookup_test") {
+  testonly = true
+  public = [ "internal/unordered_set_lookup_test.h" ]
+  deps = [
+    ":hash_generator_testing",
+    ":hash_policy_testing",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("unordered_set_modifiers_test") {
+  testonly = true
+  public = [ "internal/unordered_set_modifiers_test.h" ]
+  deps = [
+    ":hash_generator_testing",
+    ":hash_policy_testing",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_test("sample_element_size_test") {
+  public = [ "sample_element_size_test.cc" ]
+  deps = [
+    ":flat_hash_map",
+    ":flat_hash_set",
+    ":node_hash_map",
+    ":node_hash_set",
+  ]
+}
+
+absl_source_set("btree") {
+  sources = [
+    "internal/btree.h",
+    "internal/btree_container.h",
+  ]
+  public = [
+    "btree_map.h",
+    "btree_set.h",
+  ]
+  deps = [
+    ":common",
+    ":common_policy_traits",
+    ":compressed_tuple",
+    ":container_memory",
+    ":layout",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:cord",
+    "//third_party/abseil-cpp/absl/types:compare",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_test("inlined_vector_test") {
+  sources = [ "inlined_vector_test.cc" ]
+  deps = [
+    ":counting_allocator",
+    ":inlined_vector",
+    ":test_instance_tracker",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:exception_testing",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/hash:hash_testing",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/container/CMakeLists.txt b/third_party/abseil-cpp/absl/container/CMakeLists.txt
index 78584d2cef..b3776aed96 100644
--- a/third_party/abseil-cpp/absl/container/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/container/CMakeLists.txt
@@ -28,6 +28,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_LINKOPTS}
   DEPS
     absl::container_common
+    absl::common_policy_traits
     absl::compare
     absl::compressed_tuple
     absl::container_memory
@@ -35,12 +36,14 @@ absl_cc_library(
     absl::core_headers
     absl::layout
     absl::memory
+    absl::raw_logging_internal
     absl::strings
     absl::throw_delegate
     absl::type_traits
     absl::utility
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     btree_test_common
@@ -69,6 +72,7 @@ absl_cc_test(
   LINKOPTS
     ${ABSL_DEFAULT_LINKOPTS}
   DEPS
+    absl::algorithm_container
     absl::btree
     absl::btree_test_common
     absl::compare
@@ -76,13 +80,14 @@ absl_cc_test(
     absl::counting_allocator
     absl::flags
     absl::hash_testing
+    absl::random_random
     absl::raw_logging_internal
     absl::strings
     absl::test_instance_tracker
-    absl::type_traits
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     compressed_tuple
@@ -161,6 +166,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     inlined_vector_internal
@@ -190,9 +196,11 @@ absl_cc_library(
     absl::inlined_vector_internal
     absl::throw_delegate
     absl::memory
+    absl::type_traits
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     counting_allocator
@@ -239,6 +247,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     test_instance_tracker
@@ -274,6 +283,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::container_memory
+    absl::core_headers
     absl::hash_function_defaults
     absl::raw_hash_map
     absl::algorithm_container
@@ -347,8 +357,9 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::container_memory
+    absl::core_headers
     absl::hash_function_defaults
-    absl::node_hash_policy
+    absl::node_slot_policy
     absl::raw_hash_map
     absl::algorithm_container
     absl::memory
@@ -381,8 +392,9 @@ absl_cc_library(
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
+    absl::core_headers
     absl::hash_function_defaults
-    absl::node_hash_policy
+    absl::node_slot_policy
     absl::raw_hash_set
     absl::algorithm_container
     absl::memory
@@ -407,6 +419,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     container_memory
@@ -436,6 +449,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hash_function_defaults
@@ -468,6 +482,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hash_generator_testing
@@ -485,6 +500,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hash_policy_testing
@@ -510,6 +526,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hash_policy_traits
@@ -518,6 +535,7 @@ absl_cc_library(
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
+    absl::common_policy_traits
     absl::meta
   PUBLIC
 )
@@ -534,6 +552,32 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
+absl_cc_library(
+  NAME
+    common_policy_traits
+  HDRS
+    "internal/common_policy_traits.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  DEPS
+    absl::meta
+  PUBLIC
+)
+
+absl_cc_test(
+  NAME
+    common_policy_traits_test
+  SRCS
+    "internal/common_policy_traits_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  DEPS
+    absl::common_policy_traits
+    GTest::gmock_main
+)
+
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hashtablez_sampler
@@ -546,8 +590,8 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::base
+    absl::config
     absl::exponential_biased
-    absl::have_sse
     absl::sample_recorder
     absl::synchronization
 )
@@ -560,11 +604,12 @@ absl_cc_test(
   COPTS
     ${ABSL_TEST_COPTS}
   DEPS
+    absl::config
     absl::hashtablez_sampler
-    absl::have_sse
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hashtable_debug
@@ -576,6 +621,7 @@ absl_cc_library(
     absl::hashtable_debug_hooks
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     hashtable_debug_hooks
@@ -588,20 +634,12 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
-    have_sse
+    node_slot_policy
   HDRS
-    "internal/have_sse.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    node_hash_policy
-  HDRS
-    "internal/node_hash_policy.h"
+    "internal/node_slot_policy.h"
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
@@ -611,17 +649,18 @@ absl_cc_library(
 
 absl_cc_test(
   NAME
-    node_hash_policy_test
+    node_slot_policy_test
   SRCS
-    "internal/node_hash_policy_test.cc"
+    "internal/node_slot_policy_test.cc"
   COPTS
     ${ABSL_TEST_COPTS}
   DEPS
     absl::hash_policy_traits
-    absl::node_hash_policy
+    absl::node_slot_policy
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     raw_hash_map
@@ -636,6 +675,7 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     container_common
@@ -647,6 +687,7 @@ absl_cc_library(
     absl::type_traits
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     raw_hash_set
@@ -666,10 +707,10 @@ absl_cc_library(
     absl::endian
     absl::hash_policy_traits
     absl::hashtable_debug_hooks
-    absl::have_sse
     absl::memory
     absl::meta
     absl::optional
+    absl::prefetch
     absl::utility
     absl::hashtablez_sampler
   PUBLIC
@@ -684,13 +725,17 @@ absl_cc_test(
     ${ABSL_TEST_COPTS}
   DEPS
     absl::container_memory
+    absl::flat_hash_map
+    absl::flat_hash_set
     absl::hash_function_defaults
     absl::hash_policy_testing
     absl::hashtable_debug
     absl::raw_hash_set
     absl::base
     absl::config
+    absl::log
     absl::core_headers
+    absl::prefetch
     absl::raw_logging_internal
     absl::strings
     GTest::gmock_main
@@ -710,6 +755,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     layout
@@ -743,6 +789,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     tracked
@@ -755,6 +802,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_map_constructor_test
@@ -769,6 +817,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_map_lookup_test
@@ -783,6 +832,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_map_members_test
@@ -796,6 +846,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_map_modifiers_test
@@ -810,6 +861,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_set_constructor_test
@@ -824,6 +876,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_set_lookup_test
@@ -838,6 +891,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_set_members_test
@@ -851,6 +905,7 @@ absl_cc_library(
   TESTONLY
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     unordered_set_modifiers_test
diff --git a/third_party/abseil-cpp/absl/container/btree_benchmark.cc b/third_party/abseil-cpp/absl/container/btree_benchmark.cc
index 65b6790b71..0d26fd424c 100644
--- a/third_party/abseil-cpp/absl/container/btree_benchmark.cc
+++ b/third_party/abseil-cpp/absl/container/btree_benchmark.cc
@@ -27,6 +27,7 @@
 #include <vector>
 
 #include "benchmark/benchmark.h"
+#include "absl/algorithm/container.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/container/btree_map.h"
 #include "absl/container/btree_set.h"
@@ -34,9 +35,10 @@
 #include "absl/container/flat_hash_map.h"
 #include "absl/container/flat_hash_set.h"
 #include "absl/container/internal/hashtable_debug.h"
-#include "absl/flags/flag.h"
 #include "absl/hash/hash.h"
+#include "absl/log/log.h"
 #include "absl/memory/memory.h"
+#include "absl/random/random.h"
 #include "absl/strings/cord.h"
 #include "absl/strings/str_format.h"
 #include "absl/time/time.h"
@@ -153,9 +155,9 @@ void BM_FullLookup(benchmark::State& state) {
   BM_LookupImpl<T>(state, true);
 }
 
-// Benchmark deletion of values from a container.
+// Benchmark erasing values from a container.
 template <typename T>
-void BM_Delete(benchmark::State& state) {
+void BM_Erase(benchmark::State& state) {
   using V = typename remove_pair_const<typename T::value_type>::type;
   typename KeyOfValue<typename T::key_type, V>::type key_of_value;
   std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
@@ -180,9 +182,9 @@ void BM_Delete(benchmark::State& state) {
   }
 }
 
-// Benchmark deletion of multiple values from a container.
+// Benchmark erasing multiple values from a container.
 template <typename T>
-void BM_DeleteRange(benchmark::State& state) {
+void BM_EraseRange(benchmark::State& state) {
   using V = typename remove_pair_const<typename T::value_type>::type;
   typename KeyOfValue<typename T::key_type, V>::type key_of_value;
   std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
@@ -222,6 +224,40 @@ void BM_DeleteRange(benchmark::State& state) {
   }
 }
 
+// Predicate that erases every other element. We can't use a lambda because
+// C++11 doesn't support generic lambdas.
+// TODO(b/207389011): consider adding benchmarks that remove different fractions
+// of keys (e.g. 10%, 90%).
+struct EraseIfPred {
+  uint64_t i = 0;
+  template <typename T>
+  bool operator()(const T&) {
+    return ++i % 2;
+  }
+};
+
+// Benchmark erasing multiple values from a container with a predicate.
+template <typename T>
+void BM_EraseIf(benchmark::State& state) {
+  using V = typename remove_pair_const<typename T::value_type>::type;
+  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+
+  // Removes half of the keys per batch.
+  const int batch_size = (kBenchmarkValues + 1) / 2;
+  EraseIfPred pred;
+  while (state.KeepRunningBatch(batch_size)) {
+    state.PauseTiming();
+    {
+      T container(values.begin(), values.end());
+      state.ResumeTiming();
+      erase_if(container, pred);
+      benchmark::DoNotOptimize(container);
+      state.PauseTiming();
+    }
+    state.ResumeTiming();
+  }
+}
+
 // Benchmark steady-state insert (into first half of range) and remove (from
 // second half of range), treating the container approximately like a queue with
 // log-time access for all elements. This benchmark does not test the case where
@@ -477,14 +513,14 @@ BTREE_TYPES(Time);
   void BM_##type##_##func(benchmark::State& state) { BM_##func<type>(state); } \
   BENCHMARK(BM_##type##_##func)
 
-#define MY_BENCHMARK3(type)               \
+#define MY_BENCHMARK3_STL(type)           \
   MY_BENCHMARK4(type, Insert);            \
   MY_BENCHMARK4(type, InsertSorted);      \
   MY_BENCHMARK4(type, InsertSmall);       \
   MY_BENCHMARK4(type, Lookup);            \
   MY_BENCHMARK4(type, FullLookup);        \
-  MY_BENCHMARK4(type, Delete);            \
-  MY_BENCHMARK4(type, DeleteRange);       \
+  MY_BENCHMARK4(type, Erase);             \
+  MY_BENCHMARK4(type, EraseRange);        \
   MY_BENCHMARK4(type, QueueAddRem);       \
   MY_BENCHMARK4(type, MixedAddRem);       \
   MY_BENCHMARK4(type, Fifo);              \
@@ -492,9 +528,13 @@ BTREE_TYPES(Time);
   MY_BENCHMARK4(type, InsertRangeRandom); \
   MY_BENCHMARK4(type, InsertRangeSorted)
 
+#define MY_BENCHMARK3(type)     \
+  MY_BENCHMARK4(type, EraseIf); \
+  MY_BENCHMARK3_STL(type)
+
 #define MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(type) \
-  MY_BENCHMARK3(stl_##type);                    \
-  MY_BENCHMARK3(stl_unordered_##type);          \
+  MY_BENCHMARK3_STL(stl_##type);                \
+  MY_BENCHMARK3_STL(stl_unordered_##type);      \
   MY_BENCHMARK3(btree_256_##type)
 
 #define MY_BENCHMARK2(type)                \
@@ -684,17 +724,40 @@ double ContainerInfo(const btree_map<int, BigTypePtr<Size>>& b) {
       btree_set<BigTypePtr<SIZE>>;                                             \
   using btree_256_map_size##SIZE##copies##SIZE##ptr =                          \
       btree_map<int, BigTypePtr<SIZE>>;                                        \
-  MY_BENCHMARK3(stl_set_size##SIZE##copies##SIZE##ptr);                        \
-  MY_BENCHMARK3(stl_unordered_set_size##SIZE##copies##SIZE##ptr);              \
+  MY_BENCHMARK3_STL(stl_set_size##SIZE##copies##SIZE##ptr);                    \
+  MY_BENCHMARK3_STL(stl_unordered_set_size##SIZE##copies##SIZE##ptr);          \
   MY_BENCHMARK3(flat_hash_set_size##SIZE##copies##SIZE##ptr);                  \
   MY_BENCHMARK3(btree_256_set_size##SIZE##copies##SIZE##ptr);                  \
-  MY_BENCHMARK3(stl_map_size##SIZE##copies##SIZE##ptr);                        \
-  MY_BENCHMARK3(stl_unordered_map_size##SIZE##copies##SIZE##ptr);              \
+  MY_BENCHMARK3_STL(stl_map_size##SIZE##copies##SIZE##ptr);                    \
+  MY_BENCHMARK3_STL(stl_unordered_map_size##SIZE##copies##SIZE##ptr);          \
   MY_BENCHMARK3(flat_hash_map_size##SIZE##copies##SIZE##ptr);                  \
   MY_BENCHMARK3(btree_256_map_size##SIZE##copies##SIZE##ptr)
 
 BIG_TYPE_PTR_BENCHMARKS(32);
 
+void BM_BtreeSet_IteratorSubtraction(benchmark::State& state) {
+  absl::InsecureBitGen bitgen;
+  std::vector<int> vec;
+  // Randomize the set's insertion order so the nodes aren't all full.
+  vec.reserve(state.range(0));
+  for (int i = 0; i < state.range(0); ++i) vec.push_back(i);
+  absl::c_shuffle(vec, bitgen);
+
+  absl::btree_set<int> set;
+  for (int i : vec) set.insert(i);
+
+  size_t distance = absl::Uniform(bitgen, 0u, set.size());
+  while (state.KeepRunningBatch(distance)) {
+    size_t end = absl::Uniform(bitgen, distance, set.size());
+    size_t begin = end - distance;
+    benchmark::DoNotOptimize(set.find(static_cast<int>(end)) -
+                             set.find(static_cast<int>(begin)));
+    distance = absl::Uniform(bitgen, 0u, set.size());
+  }
+}
+
+BENCHMARK(BM_BtreeSet_IteratorSubtraction)->Range(1 << 10, 1 << 20);
+
 }  // namespace
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/btree_map.h b/third_party/abseil-cpp/absl/container/btree_map.h
index f0a8d4a6a4..819a925f8e 100644
--- a/third_party/abseil-cpp/absl/container/btree_map.h
+++ b/third_party/abseil-cpp/absl/container/btree_map.h
@@ -35,14 +35,20 @@
 //
 // However, these types should not be considered drop-in replacements for
 // `std::map` and `std::multimap` as there are some API differences, which are
-// noted in this header file.
+// noted in this header file. The most consequential differences with respect to
+// migrating to b-tree from the STL types are listed in the next paragraph.
+// Other API differences are minor.
 //
 // Importantly, insertions and deletions may invalidate outstanding iterators,
 // pointers, and references to elements. Such invalidations are typically only
 // an issue if insertion and deletion operations are interleaved with the use of
 // more than one iterator, pointer, or reference simultaneously. For this
 // reason, `insert()` and `erase()` return a valid iterator at the current
-// position.
+// position (and `extract()` cannot be used in this way). Another important
+// difference is that key-types must be copy-constructible.
+//
+// Another API difference is that btree iterators can be subtracted, and this
+// is faster than using std::distance.
 
 #ifndef ABSL_CONTAINER_BTREE_MAP_H_
 #define ABSL_CONTAINER_BTREE_MAP_H_
@@ -53,6 +59,14 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
+namespace container_internal {
+
+template <typename Key, typename Data, typename Compare, typename Alloc,
+          int TargetNodeSize, bool IsMulti>
+struct map_params;
+
+}  // namespace container_internal
+
 // absl::btree_map<>
 //
 // An `absl::btree_map<K, V>` is an ordered associative container of
@@ -74,7 +88,7 @@ class btree_map
     : public container_internal::btree_map_container<
           container_internal::btree<container_internal::map_params<
               Key, Value, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/false>>> {
+              /*IsMulti=*/false>>> {
   using Base = typename btree_map::btree_map_container;
 
  public:
@@ -311,7 +325,8 @@ class btree_map
   // btree_map::extract()
   //
   // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
+  // as a C++17-compatible node handle. Any references, pointers, or iterators
+  // are invalidated. Overloads are listed below.
   //
   // node_type extract(const_iterator position):
   //
@@ -467,15 +482,11 @@ void swap(btree_map<K, V, C, A> &x, btree_map<K, V, C, A> &y) {
 // absl::erase_if(absl::btree_map<>, Pred)
 //
 // Erases all elements that satisfy the predicate pred from the container.
+// Returns the number of erased elements.
 template <typename K, typename V, typename C, typename A, typename Pred>
-void erase_if(btree_map<K, V, C, A> &map, Pred pred) {
-  for (auto it = map.begin(); it != map.end();) {
-    if (pred(*it)) {
-      it = map.erase(it);
-    } else {
-      ++it;
-    }
-  }
+typename btree_map<K, V, C, A>::size_type erase_if(
+    btree_map<K, V, C, A> &map, Pred pred) {
+  return container_internal::btree_access::erase_if(map, std::move(pred));
 }
 
 // absl::btree_multimap
@@ -500,7 +511,7 @@ class btree_multimap
     : public container_internal::btree_multimap_container<
           container_internal::btree<container_internal::map_params<
               Key, Value, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/true>>> {
+              /*IsMulti=*/true>>> {
   using Base = typename btree_multimap::btree_multimap_container;
 
  public:
@@ -798,17 +809,46 @@ void swap(btree_multimap<K, V, C, A> &x, btree_multimap<K, V, C, A> &y) {
 // absl::erase_if(absl::btree_multimap<>, Pred)
 //
 // Erases all elements that satisfy the predicate pred from the container.
+// Returns the number of erased elements.
 template <typename K, typename V, typename C, typename A, typename Pred>
-void erase_if(btree_multimap<K, V, C, A> &map, Pred pred) {
-  for (auto it = map.begin(); it != map.end();) {
-    if (pred(*it)) {
-      it = map.erase(it);
-    } else {
-      ++it;
-    }
-  }
+typename btree_multimap<K, V, C, A>::size_type erase_if(
+    btree_multimap<K, V, C, A> &map, Pred pred) {
+  return container_internal::btree_access::erase_if(map, std::move(pred));
 }
 
+namespace container_internal {
+
+// A parameters structure for holding the type parameters for a btree_map.
+// Compare and Alloc should be nothrow copy-constructible.
+template <typename Key, typename Data, typename Compare, typename Alloc,
+          int TargetNodeSize, bool IsMulti>
+struct map_params : common_params<Key, Compare, Alloc, TargetNodeSize, IsMulti,
+                                  /*IsMap=*/true, map_slot_policy<Key, Data>> {
+  using super_type = typename map_params::common_params;
+  using mapped_type = Data;
+  // This type allows us to move keys when it is safe to do so. It is safe
+  // for maps in which value_type and mutable_value_type are layout compatible.
+  using slot_policy = typename super_type::slot_policy;
+  using slot_type = typename super_type::slot_type;
+  using value_type = typename super_type::value_type;
+  using init_type = typename super_type::init_type;
+
+  template <typename V>
+  static auto key(const V &value) -> decltype(value.first) {
+    return value.first;
+  }
+  static const Key &key(const slot_type *s) { return slot_policy::key(s); }
+  static const Key &key(slot_type *s) { return slot_policy::key(s); }
+  // For use in node handle.
+  static auto mutable_key(slot_type *s)
+      -> decltype(slot_policy::mutable_key(s)) {
+    return slot_policy::mutable_key(s);
+  }
+  static mapped_type &value(value_type *value) { return value->second; }
+};
+
+}  // namespace container_internal
+
 ABSL_NAMESPACE_END
 }  // namespace absl
 
diff --git a/third_party/abseil-cpp/absl/container/btree_set.h b/third_party/abseil-cpp/absl/container/btree_set.h
index 8973900693..d93bdbf6d6 100644
--- a/third_party/abseil-cpp/absl/container/btree_set.h
+++ b/third_party/abseil-cpp/absl/container/btree_set.h
@@ -35,14 +35,19 @@
 //
 // However, these types should not be considered drop-in replacements for
 // `std::set` and `std::multiset` as there are some API differences, which are
-// noted in this header file.
+// noted in this header file. The most consequential differences with respect to
+// migrating to b-tree from the STL types are listed in the next paragraph.
+// Other API differences are minor.
 //
 // Importantly, insertions and deletions may invalidate outstanding iterators,
 // pointers, and references to elements. Such invalidations are typically only
 // an issue if insertion and deletion operations are interleaved with the use of
 // more than one iterator, pointer, or reference simultaneously. For this
 // reason, `insert()` and `erase()` return a valid iterator at the current
-// position.
+// position (and `extract()` cannot be used in this way).
+//
+// Another API difference is that btree iterators can be subtracted, and this
+// is faster than using std::distance.
 
 #ifndef ABSL_CONTAINER_BTREE_SET_H_
 #define ABSL_CONTAINER_BTREE_SET_H_
@@ -53,6 +58,17 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
+namespace container_internal {
+
+template <typename Key>
+struct set_slot_policy;
+
+template <typename Key, typename Compare, typename Alloc, int TargetNodeSize,
+          bool IsMulti>
+struct set_params;
+
+}  // namespace container_internal
+
 // absl::btree_set<>
 //
 // An `absl::btree_set<K>` is an ordered associative container of unique key
@@ -74,7 +90,7 @@ class btree_set
     : public container_internal::btree_set_container<
           container_internal::btree<container_internal::set_params<
               Key, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/false>>> {
+              /*IsMulti=*/false>>> {
   using Base = typename btree_set::btree_set_container;
 
  public:
@@ -256,7 +272,8 @@ class btree_set
   // btree_set::extract()
   //
   // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
+  // as a C++17-compatible node handle. Any references, pointers, or iterators
+  // are invalidated. Overloads are listed below.
   //
   // node_type extract(const_iterator position):
   //
@@ -385,15 +402,11 @@ void swap(btree_set<K, C, A> &x, btree_set<K, C, A> &y) {
 // absl::erase_if(absl::btree_set<>, Pred)
 //
 // Erases all elements that satisfy the predicate pred from the container.
+// Returns the number of erased elements.
 template <typename K, typename C, typename A, typename Pred>
-void erase_if(btree_set<K, C, A> &set, Pred pred) {
-  for (auto it = set.begin(); it != set.end();) {
-    if (pred(*it)) {
-      it = set.erase(it);
-    } else {
-      ++it;
-    }
-  }
+typename btree_set<K, C, A>::size_type erase_if(btree_set<K, C, A> &set,
+                                                Pred pred) {
+  return container_internal::btree_access::erase_if(set, std::move(pred));
 }
 
 // absl::btree_multiset<>
@@ -418,7 +431,7 @@ class btree_multiset
     : public container_internal::btree_multiset_container<
           container_internal::btree<container_internal::set_params<
               Key, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/true>>> {
+              /*IsMulti=*/true>>> {
   using Base = typename btree_multiset::btree_multiset_container;
 
  public:
@@ -711,17 +724,67 @@ void swap(btree_multiset<K, C, A> &x, btree_multiset<K, C, A> &y) {
 // absl::erase_if(absl::btree_multiset<>, Pred)
 //
 // Erases all elements that satisfy the predicate pred from the container.
+// Returns the number of erased elements.
 template <typename K, typename C, typename A, typename Pred>
-void erase_if(btree_multiset<K, C, A> &set, Pred pred) {
-  for (auto it = set.begin(); it != set.end();) {
-    if (pred(*it)) {
-      it = set.erase(it);
-    } else {
-      ++it;
-    }
-  }
+typename btree_multiset<K, C, A>::size_type erase_if(
+   btree_multiset<K, C, A> & set, Pred pred) {
+  return container_internal::btree_access::erase_if(set, std::move(pred));
 }
 
+namespace container_internal {
+
+// This type implements the necessary functions from the
+// absl::container_internal::slot_type interface for btree_(multi)set.
+template <typename Key>
+struct set_slot_policy {
+  using slot_type = Key;
+  using value_type = Key;
+  using mutable_value_type = Key;
+
+  static value_type &element(slot_type *slot) { return *slot; }
+  static const value_type &element(const slot_type *slot) { return *slot; }
+
+  template <typename Alloc, class... Args>
+  static void construct(Alloc *alloc, slot_type *slot, Args &&...args) {
+    absl::allocator_traits<Alloc>::construct(*alloc, slot,
+                                             std::forward<Args>(args)...);
+  }
+
+  template <typename Alloc>
+  static void construct(Alloc *alloc, slot_type *slot, slot_type *other) {
+    absl::allocator_traits<Alloc>::construct(*alloc, slot, std::move(*other));
+  }
+
+  template <typename Alloc>
+  static void construct(Alloc *alloc, slot_type *slot, const slot_type *other) {
+    absl::allocator_traits<Alloc>::construct(*alloc, slot, *other);
+  }
+
+  template <typename Alloc>
+  static void destroy(Alloc *alloc, slot_type *slot) {
+    absl::allocator_traits<Alloc>::destroy(*alloc, slot);
+  }
+};
+
+// A parameters structure for holding the type parameters for a btree_set.
+// Compare and Alloc should be nothrow copy-constructible.
+template <typename Key, typename Compare, typename Alloc, int TargetNodeSize,
+          bool IsMulti>
+struct set_params : common_params<Key, Compare, Alloc, TargetNodeSize, IsMulti,
+                                  /*IsMap=*/false, set_slot_policy<Key>> {
+  using value_type = Key;
+  using slot_type = typename set_params::common_params::slot_type;
+
+  template <typename V>
+  static const V &key(const V &value) {
+    return value;
+  }
+  static const Key &key(const slot_type *slot) { return *slot; }
+  static const Key &key(slot_type *slot) { return *slot; }
+};
+
+}  // namespace container_internal
+
 ABSL_NAMESPACE_END
 }  // namespace absl
 
diff --git a/third_party/abseil-cpp/absl/container/btree_test.cc b/third_party/abseil-cpp/absl/container/btree_test.cc
index d27cf27105..e6d4e360be 100644
--- a/third_party/abseil-cpp/absl/container/btree_test.cc
+++ b/third_party/abseil-cpp/absl/container/btree_test.cc
@@ -14,17 +14,24 @@
 
 #include "absl/container/btree_test.h"
 
+#include <algorithm>
+#include <array>
 #include <cstdint>
+#include <functional>
+#include <iterator>
 #include <limits>
 #include <map>
 #include <memory>
+#include <numeric>
 #include <stdexcept>
 #include <string>
 #include <type_traits>
 #include <utility>
+#include <vector>
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
+#include "absl/algorithm/container.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/base/macros.h"
 #include "absl/container/btree_map.h"
@@ -34,7 +41,7 @@
 #include "absl/flags/flag.h"
 #include "absl/hash/hash_testing.h"
 #include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
+#include "absl/random/random.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_split.h"
 #include "absl/strings/string_view.h"
@@ -1212,6 +1219,11 @@ class BtreeNodePeer {
   constexpr static bool UsesLinearNodeSearch() {
     return btree_node<typename Btree::params_type>::use_linear_search::value;
   }
+
+  template <typename Btree>
+  constexpr static bool UsesGenerations() {
+    return Btree::params_type::kEnableGenerations;
+  }
 };
 
 namespace {
@@ -1285,7 +1297,7 @@ TEST(Btree, BtreeMapCanHoldMoveOnlyTypes) {
 
   std::unique_ptr<std::string> &v = m["A"];
   EXPECT_TRUE(v == nullptr);
-  v.reset(new std::string("X"));
+  v = absl::make_unique<std::string>("X");
 
   auto iter = m.find("A");
   EXPECT_EQ("X", *iter->second);
@@ -1344,38 +1356,34 @@ TEST(Btree, InitializerListInsert) {
   EXPECT_EQ(++it, range.second);
 }
 
-template <typename Compare, typename K>
-void AssertKeyCompareToAdapted() {
-  using Adapted = typename key_compare_to_adapter<Compare>::type;
-  static_assert(!std::is_same<Adapted, Compare>::value,
-                "key_compare_to_adapter should have adapted this comparator.");
+template <typename Compare, typename Key>
+void AssertKeyCompareStringAdapted() {
+  using Adapted = typename key_compare_adapter<Compare, Key>::type;
   static_assert(
-      std::is_same<absl::weak_ordering,
-                   absl::result_of_t<Adapted(const K &, const K &)>>::value,
-      "Adapted comparator should be a key-compare-to comparator.");
+      std::is_same<Adapted, StringBtreeDefaultLess>::value ||
+          std::is_same<Adapted, StringBtreeDefaultGreater>::value,
+      "key_compare_adapter should have string-adapted this comparator.");
 }
-template <typename Compare, typename K>
-void AssertKeyCompareToNotAdapted() {
-  using Unadapted = typename key_compare_to_adapter<Compare>::type;
-  static_assert(
-      std::is_same<Unadapted, Compare>::value,
-      "key_compare_to_adapter shouldn't have adapted this comparator.");
+template <typename Compare, typename Key>
+void AssertKeyCompareNotStringAdapted() {
+  using Adapted = typename key_compare_adapter<Compare, Key>::type;
   static_assert(
-      std::is_same<bool,
-                   absl::result_of_t<Unadapted(const K &, const K &)>>::value,
-      "Un-adapted comparator should return bool.");
+      !std::is_same<Adapted, StringBtreeDefaultLess>::value &&
+          !std::is_same<Adapted, StringBtreeDefaultGreater>::value,
+      "key_compare_adapter shouldn't have string-adapted this comparator.");
 }
 
-TEST(Btree, KeyCompareToAdapter) {
-  AssertKeyCompareToAdapted<std::less<std::string>, std::string>();
-  AssertKeyCompareToAdapted<std::greater<std::string>, std::string>();
-  AssertKeyCompareToAdapted<std::less<absl::string_view>, absl::string_view>();
-  AssertKeyCompareToAdapted<std::greater<absl::string_view>,
-                            absl::string_view>();
-  AssertKeyCompareToAdapted<std::less<absl::Cord>, absl::Cord>();
-  AssertKeyCompareToAdapted<std::greater<absl::Cord>, absl::Cord>();
-  AssertKeyCompareToNotAdapted<std::less<int>, int>();
-  AssertKeyCompareToNotAdapted<std::greater<int>, int>();
+TEST(Btree, KeyCompareAdapter) {
+  AssertKeyCompareStringAdapted<std::less<std::string>, std::string>();
+  AssertKeyCompareStringAdapted<std::greater<std::string>, std::string>();
+  AssertKeyCompareStringAdapted<std::less<absl::string_view>,
+                                absl::string_view>();
+  AssertKeyCompareStringAdapted<std::greater<absl::string_view>,
+                                absl::string_view>();
+  AssertKeyCompareStringAdapted<std::less<absl::Cord>, absl::Cord>();
+  AssertKeyCompareStringAdapted<std::greater<absl::Cord>, absl::Cord>();
+  AssertKeyCompareNotStringAdapted<std::less<int>, int>();
+  AssertKeyCompareNotStringAdapted<std::greater<int>, int>();
 }
 
 TEST(Btree, RValueInsert) {
@@ -1425,11 +1433,19 @@ TEST(Btree, RValueInsert) {
   EXPECT_EQ(tracker.swaps(), 0);
 }
 
-// A btree set with a specific number of values per node.
+template <typename Cmp>
+struct CheckedCompareOptedOutCmp : Cmp, BtreeTestOnlyCheckedCompareOptOutBase {
+  using Cmp::Cmp;
+  CheckedCompareOptedOutCmp() {}
+  CheckedCompareOptedOutCmp(Cmp cmp) : Cmp(std::move(cmp)) {}  // NOLINT
+};
+
+// A btree set with a specific number of values per node. Opt out of
+// checked_compare so that we can expect exact numbers of comparisons.
 template <typename Key, int TargetValuesPerNode, typename Cmp = std::less<Key>>
 class SizedBtreeSet
     : public btree_set_container<btree<
-          set_params<Key, Cmp, std::allocator<Key>,
+          set_params<Key, CheckedCompareOptedOutCmp<Cmp>, std::allocator<Key>,
                      BtreeNodePeer::GetTargetNodeSize<Key>(TargetValuesPerNode),
                      /*Multi=*/false>>> {
   using Base = typename SizedBtreeSet::btree_set_container;
@@ -1473,8 +1489,10 @@ TEST(Btree, MovesComparisonsCopiesSwapsTracking) {
   EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>(), 61);
   EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set100)>(), 100);
   if (sizeof(void *) == 8) {
-    EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<absl::btree_set<int32_t>>(),
-              BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>());
+    EXPECT_EQ(
+        BtreeNodePeer::GetNumSlotsPerNode<absl::btree_set<int32_t>>(),
+        // When we have generations, there is one fewer slot.
+        BtreeNodePeer::UsesGenerations<absl::btree_set<int32_t>>() ? 60 : 61);
   }
 
   // Test key insertion/deletion in random order.
@@ -1528,8 +1546,10 @@ TEST(Btree, MovesComparisonsCopiesSwapsTrackingThreeWayCompare) {
   EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>(), 61);
   EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set100)>(), 100);
   if (sizeof(void *) == 8) {
-    EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<absl::btree_set<int32_t>>(),
-              BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>());
+    EXPECT_EQ(
+        BtreeNodePeer::GetNumSlotsPerNode<absl::btree_set<int32_t>>(),
+        // When we have generations, there is one fewer slot.
+        BtreeNodePeer::UsesGenerations<absl::btree_set<int32_t>>() ? 60 : 61);
   }
 
   // Test key insertion/deletion in random order.
@@ -1748,6 +1768,22 @@ TEST(Btree, ValueComp) {
   EXPECT_FALSE(m2.value_comp()(std::make_pair("b", 0), std::make_pair("a", 0)));
 }
 
+// Test that we have the protected members from the std::map::value_compare API.
+// See https://en.cppreference.com/w/cpp/container/map/value_compare.
+TEST(Btree, MapValueCompProtected) {
+  struct key_compare {
+    bool operator()(int l, int r) const { return l < r; }
+    int id;
+  };
+  using value_compare = absl::btree_map<int, int, key_compare>::value_compare;
+  struct value_comp_child : public value_compare {
+    explicit value_comp_child(key_compare kc) : value_compare(kc) {}
+    int GetId() const { return comp.id; }
+  };
+  value_comp_child c(key_compare{10});
+  EXPECT_EQ(c.GetId(), 10);
+}
+
 TEST(Btree, DefaultConstruction) {
   absl::btree_set<int> s;
   absl::btree_map<int, int> m;
@@ -2297,7 +2333,9 @@ TEST(Btree, TryEmplaceWithHintWorks) {
   };
   using Cmp = decltype(cmp);
 
-  absl::btree_map<int, int, Cmp> m(cmp);
+  // Use a map that is opted out of key_compare being adapted so we can expect
+  // strict comparison call limits.
+  absl::btree_map<int, int, CheckedCompareOptedOutCmp<Cmp>> m(cmp);
   for (int i = 0; i < 128; ++i) {
     m.emplace(i, i);
   }
@@ -2452,23 +2490,28 @@ TEST(Btree, EraseIf) {
   // Test that erase_if works with all the container types and supports lambdas.
   {
     absl::btree_set<int> s = {1, 3, 5, 6, 100};
-    erase_if(s, [](int k) { return k > 3; });
+    EXPECT_EQ(erase_if(s, [](int k) { return k > 3; }), 3);
     EXPECT_THAT(s, ElementsAre(1, 3));
   }
   {
     absl::btree_multiset<int> s = {1, 3, 3, 5, 6, 6, 100};
-    erase_if(s, [](int k) { return k <= 3; });
+    EXPECT_EQ(erase_if(s, [](int k) { return k <= 3; }), 3);
     EXPECT_THAT(s, ElementsAre(5, 6, 6, 100));
   }
   {
     absl::btree_map<int, int> m = {{1, 1}, {3, 3}, {6, 6}, {100, 100}};
-    erase_if(m, [](std::pair<const int, int> kv) { return kv.first > 3; });
+    EXPECT_EQ(
+        erase_if(m, [](std::pair<const int, int> kv) { return kv.first > 3; }),
+        2);
     EXPECT_THAT(m, ElementsAre(Pair(1, 1), Pair(3, 3)));
   }
   {
     absl::btree_multimap<int, int> m = {{1, 1}, {3, 3}, {3, 6},
                                         {6, 6}, {6, 7}, {100, 6}};
-    erase_if(m, [](std::pair<const int, int> kv) { return kv.second == 6; });
+    EXPECT_EQ(
+        erase_if(m,
+                 [](std::pair<const int, int> kv) { return kv.second == 6; }),
+        3);
     EXPECT_THAT(m, ElementsAre(Pair(1, 1), Pair(3, 3), Pair(6, 7)));
   }
   // Test that erasing all elements from a large set works and test support for
@@ -2476,15 +2519,29 @@ TEST(Btree, EraseIf) {
   {
     absl::btree_set<int> s;
     for (int i = 0; i < 1000; ++i) s.insert(2 * i);
-    erase_if(s, IsEven);
+    EXPECT_EQ(erase_if(s, IsEven), 1000);
     EXPECT_THAT(s, IsEmpty());
   }
   // Test that erase_if supports other format of function pointers.
   {
     absl::btree_set<int> s = {1, 3, 5, 6, 100};
-    erase_if(s, &IsEven);
+    EXPECT_EQ(erase_if(s, &IsEven), 2);
     EXPECT_THAT(s, ElementsAre(1, 3, 5));
   }
+  // Test that erase_if invokes the predicate once per element.
+  {
+    absl::btree_set<int> s;
+    for (int i = 0; i < 1000; ++i) s.insert(i);
+    int pred_calls = 0;
+    EXPECT_EQ(erase_if(s,
+                       [&pred_calls](int k) {
+                         ++pred_calls;
+                         return k % 2;
+                       }),
+              500);
+    EXPECT_THAT(s, SizeIs(500));
+    EXPECT_EQ(pred_calls, 1000);
+  }
 }
 
 TEST(Btree, InsertOrAssign) {
@@ -2948,6 +3005,349 @@ TEST(Btree, ConstructImplicitlyWithUnadaptedComparator) {
   absl::btree_set<MultiKey, MultiKeyComp> set = {{}, MultiKeyComp{}};
 }
 
+#ifndef NDEBUG
+TEST(Btree, InvalidComparatorsCaught) {
+  {
+    struct ZeroAlwaysLessCmp {
+      bool operator()(int lhs, int rhs) const {
+        if (lhs == 0) return true;
+        return lhs < rhs;
+      }
+    };
+    absl::btree_set<int, ZeroAlwaysLessCmp> set;
+    EXPECT_DEATH(set.insert({0, 1, 2}), "is_self_equivalent");
+  }
+  {
+    struct ThreeWayAlwaysLessCmp {
+      absl::weak_ordering operator()(int, int) const {
+        return absl::weak_ordering::less;
+      }
+    };
+    absl::btree_set<int, ThreeWayAlwaysLessCmp> set;
+    EXPECT_DEATH(set.insert({0, 1, 2}), "is_self_equivalent");
+  }
+  {
+    struct SumGreaterZeroCmp {
+      bool operator()(int lhs, int rhs) const {
+        // First, do equivalence correctly - so we can test later condition.
+        if (lhs == rhs) return false;
+        return lhs + rhs > 0;
+      }
+    };
+    absl::btree_set<int, SumGreaterZeroCmp> set;
+    // Note: '!' only needs to be escaped when it's the first character.
+    EXPECT_DEATH(set.insert({0, 1, 2}),
+                 R"regex(\!lhs_comp_rhs \|\| !comp\(\)\(rhs, lhs\))regex");
+  }
+  {
+    struct ThreeWaySumGreaterZeroCmp {
+      absl::weak_ordering operator()(int lhs, int rhs) const {
+        // First, do equivalence correctly - so we can test later condition.
+        if (lhs == rhs) return absl::weak_ordering::equivalent;
+
+        if (lhs + rhs > 0) return absl::weak_ordering::less;
+        if (lhs + rhs == 0) return absl::weak_ordering::equivalent;
+        return absl::weak_ordering::greater;
+      }
+    };
+    absl::btree_set<int, ThreeWaySumGreaterZeroCmp> set;
+    EXPECT_DEATH(set.insert({0, 1, 2}), "lhs_comp_rhs < 0 -> rhs_comp_lhs > 0");
+  }
+}
+#endif
+
+#ifndef _MSC_VER
+// This test crashes on MSVC.
+TEST(Btree, InvalidIteratorUse) {
+  if (!BtreeNodePeer::UsesGenerations<absl::btree_set<int>>())
+    GTEST_SKIP() << "Generation validation for iterators is disabled.";
+
+  {
+    absl::btree_set<int> set;
+    for (int i = 0; i < 10; ++i) set.insert(i);
+    auto it = set.begin();
+    set.erase(it++);
+    EXPECT_DEATH(set.erase(it++), "invalidated iterator");
+  }
+  {
+    absl::btree_set<int> set;
+    for (int i = 0; i < 10; ++i) set.insert(i);
+    auto it = set.insert(20).first;
+    set.insert(30);
+    EXPECT_DEATH(*it, "invalidated iterator");
+  }
+  {
+    absl::btree_set<int> set;
+    for (int i = 0; i < 10000; ++i) set.insert(i);
+    auto it = set.find(5000);
+    ASSERT_NE(it, set.end());
+    set.erase(1);
+    EXPECT_DEATH(*it, "invalidated iterator");
+  }
+}
+#endif
+
+class OnlyConstructibleByAllocator {
+  explicit OnlyConstructibleByAllocator(int i) : i_(i) {}
+
+ public:
+  OnlyConstructibleByAllocator(const OnlyConstructibleByAllocator &other)
+      : i_(other.i_) {}
+  OnlyConstructibleByAllocator &operator=(
+      const OnlyConstructibleByAllocator &other) {
+    i_ = other.i_;
+    return *this;
+  }
+  int Get() const { return i_; }
+  bool operator==(int i) const { return i_ == i; }
+
+ private:
+  template <typename T>
+  friend class OnlyConstructibleAllocator;
+
+  int i_;
+};
+
+template <typename T = OnlyConstructibleByAllocator>
+class OnlyConstructibleAllocator : public std::allocator<T> {
+ public:
+  OnlyConstructibleAllocator() = default;
+  template <class U>
+  explicit OnlyConstructibleAllocator(const OnlyConstructibleAllocator<U> &) {}
+
+  void construct(OnlyConstructibleByAllocator *p, int i) {
+    new (p) OnlyConstructibleByAllocator(i);
+  }
+  template <typename Pair>
+  void construct(Pair *p, const int i) {
+    OnlyConstructibleByAllocator only(i);
+    new (p) Pair(std::move(only), i);
+  }
+
+  template <class U>
+  struct rebind {
+    using other = OnlyConstructibleAllocator<U>;
+  };
+};
+
+struct OnlyConstructibleByAllocatorComp {
+  using is_transparent = void;
+  bool operator()(OnlyConstructibleByAllocator a,
+                  OnlyConstructibleByAllocator b) const {
+    return a.Get() < b.Get();
+  }
+  bool operator()(int a, OnlyConstructibleByAllocator b) const {
+    return a < b.Get();
+  }
+  bool operator()(OnlyConstructibleByAllocator a, int b) const {
+    return a.Get() < b;
+  }
+};
+
+TEST(Btree, OnlyConstructibleByAllocatorType) {
+  const std::array<int, 2> arr = {3, 4};
+  {
+    absl::btree_set<OnlyConstructibleByAllocator,
+                    OnlyConstructibleByAllocatorComp,
+                    OnlyConstructibleAllocator<>>
+        set;
+    set.emplace(1);
+    set.emplace_hint(set.end(), 2);
+    set.insert(arr.begin(), arr.end());
+    EXPECT_THAT(set, ElementsAre(1, 2, 3, 4));
+  }
+  {
+    absl::btree_multiset<OnlyConstructibleByAllocator,
+                         OnlyConstructibleByAllocatorComp,
+                         OnlyConstructibleAllocator<>>
+        set;
+    set.emplace(1);
+    set.emplace_hint(set.end(), 2);
+    // TODO(ezb): fix insert_multi to allow this to compile.
+    // set.insert(arr.begin(), arr.end());
+    EXPECT_THAT(set, ElementsAre(1, 2));
+  }
+  {
+    absl::btree_map<OnlyConstructibleByAllocator, int,
+                    OnlyConstructibleByAllocatorComp,
+                    OnlyConstructibleAllocator<>>
+        map;
+    map.emplace(1);
+    map.emplace_hint(map.end(), 2);
+    map.insert(arr.begin(), arr.end());
+    EXPECT_THAT(map,
+                ElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3), Pair(4, 4)));
+  }
+  {
+    absl::btree_multimap<OnlyConstructibleByAllocator, int,
+                         OnlyConstructibleByAllocatorComp,
+                         OnlyConstructibleAllocator<>>
+        map;
+    map.emplace(1);
+    map.emplace_hint(map.end(), 2);
+    // TODO(ezb): fix insert_multi to allow this to compile.
+    // map.insert(arr.begin(), arr.end());
+    EXPECT_THAT(map, ElementsAre(Pair(1, 1), Pair(2, 2)));
+  }
+}
+
+class NotAssignable {
+ public:
+  explicit NotAssignable(int i) : i_(i) {}
+  NotAssignable(const NotAssignable &other) : i_(other.i_) {}
+  NotAssignable &operator=(NotAssignable &&other) = delete;
+  int Get() const { return i_; }
+  bool operator==(int i) const { return i_ == i; }
+  friend bool operator<(NotAssignable a, NotAssignable b) {
+    return a.i_ < b.i_;
+  }
+
+ private:
+  int i_;
+};
+
+TEST(Btree, NotAssignableType) {
+  {
+    absl::btree_set<NotAssignable> set;
+    set.emplace(1);
+    set.emplace_hint(set.end(), 2);
+    set.insert(NotAssignable(3));
+    set.insert(set.end(), NotAssignable(4));
+    EXPECT_THAT(set, ElementsAre(1, 2, 3, 4));
+    set.erase(set.begin());
+    EXPECT_THAT(set, ElementsAre(2, 3, 4));
+  }
+  {
+    absl::btree_multiset<NotAssignable> set;
+    set.emplace(1);
+    set.emplace_hint(set.end(), 2);
+    set.insert(NotAssignable(2));
+    set.insert(set.end(), NotAssignable(3));
+    EXPECT_THAT(set, ElementsAre(1, 2, 2, 3));
+    set.erase(set.begin());
+    EXPECT_THAT(set, ElementsAre(2, 2, 3));
+  }
+  {
+    absl::btree_map<NotAssignable, int> map;
+    map.emplace(NotAssignable(1), 1);
+    map.emplace_hint(map.end(), NotAssignable(2), 2);
+    map.insert({NotAssignable(3), 3});
+    map.insert(map.end(), {NotAssignable(4), 4});
+    EXPECT_THAT(map,
+                ElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3), Pair(4, 4)));
+    map.erase(map.begin());
+    EXPECT_THAT(map, ElementsAre(Pair(2, 2), Pair(3, 3), Pair(4, 4)));
+  }
+  {
+    absl::btree_multimap<NotAssignable, int> map;
+    map.emplace(NotAssignable(1), 1);
+    map.emplace_hint(map.end(), NotAssignable(2), 2);
+    map.insert({NotAssignable(2), 3});
+    map.insert(map.end(), {NotAssignable(3), 3});
+    EXPECT_THAT(map,
+                ElementsAre(Pair(1, 1), Pair(2, 2), Pair(2, 3), Pair(3, 3)));
+    map.erase(map.begin());
+    EXPECT_THAT(map, ElementsAre(Pair(2, 2), Pair(2, 3), Pair(3, 3)));
+  }
+}
+
+struct ArenaLike {
+  void* recycled = nullptr;
+  size_t recycled_size = 0;
+};
+
+// A very simple implementation of arena allocation.
+template <typename T>
+class ArenaLikeAllocator : public std::allocator<T> {
+ public:
+  // Standard library containers require the ability to allocate objects of
+  // different types which they can do so via rebind.other.
+  template <typename U>
+  struct rebind {
+    using other = ArenaLikeAllocator<U>;
+  };
+
+  explicit ArenaLikeAllocator(ArenaLike* arena) noexcept : arena_(arena) {}
+
+  ~ArenaLikeAllocator() {
+    if (arena_->recycled != nullptr) {
+      delete [] static_cast<T*>(arena_->recycled);
+      arena_->recycled = nullptr;
+    }
+  }
+
+  template<typename U>
+  explicit ArenaLikeAllocator(const ArenaLikeAllocator<U>& other) noexcept
+      : arena_(other.arena_) {}
+
+  T* allocate(size_t num_objects, const void* = nullptr) {
+    size_t size = num_objects * sizeof(T);
+    if (arena_->recycled != nullptr && arena_->recycled_size == size) {
+      T* result = static_cast<T*>(arena_->recycled);
+      arena_->recycled = nullptr;
+      return result;
+    }
+    return new T[num_objects];
+  }
+
+  void deallocate(T* p, size_t num_objects) {
+    size_t size = num_objects * sizeof(T);
+
+    // Simulate writing to the freed memory as an actual arena allocator might
+    // do. This triggers an error report if the memory is poisoned.
+    memset(p, 0xde, size);
+
+    if (arena_->recycled == nullptr) {
+      arena_->recycled = p;
+      arena_->recycled_size = size;
+    } else {
+      delete [] p;
+    }
+  }
+
+  ArenaLike* arena_;
+};
+
+// This test verifies that an arena allocator that reuses memory will not be
+// asked to free poisoned BTree memory.
+TEST(Btree, ReusePoisonMemory) {
+  using Alloc = ArenaLikeAllocator<int64_t>;
+  using Set = absl::btree_set<int64_t, std::less<int64_t>, Alloc>;
+  ArenaLike arena;
+  Alloc alloc(&arena);
+  Set set(alloc);
+
+  set.insert(0);
+  set.erase(0);
+  set.insert(0);
+}
+
+TEST(Btree, IteratorSubtraction) {
+  absl::BitGen bitgen;
+  std::vector<int> vec;
+  // Randomize the set's insertion order so the nodes aren't all full.
+  for (int i = 0; i < 1000000; ++i) vec.push_back(i);
+  absl::c_shuffle(vec, bitgen);
+
+  absl::btree_set<int> set;
+  for (int i : vec) set.insert(i);
+
+  for (int i = 0; i < 1000; ++i) {
+    size_t begin = absl::Uniform(bitgen, 0u, set.size());
+    size_t end = absl::Uniform(bitgen, begin, set.size());
+    ASSERT_EQ(end - begin, set.find(end) - set.find(begin))
+        << begin << " " << end;
+  }
+}
+
+#ifndef NDEBUG
+TEST(Btree, DereferencingEndIterator) {
+  absl::btree_set<int> set;
+  for (int i = 0; i < 1000; ++i) set.insert(i);
+  EXPECT_DEATH(*set.end(), R"regex(Dereferencing end\(\) iterator)regex");
+}
+#endif
+
 }  // namespace
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/fixed_array.h b/third_party/abseil-cpp/absl/container/fixed_array.h
index 839ba0bc16..5543243042 100644
--- a/third_party/abseil-cpp/absl/container/fixed_array.h
+++ b/third_party/abseil-cpp/absl/container/fixed_array.h
@@ -471,6 +471,9 @@ class FixedArray {
       return n <= inline_elements;
     }
 
+#ifdef ABSL_HAVE_ADDRESS_SANITIZER
+    ABSL_ATTRIBUTE_NOINLINE
+#endif  // ABSL_HAVE_ADDRESS_SANITIZER
     StorageElement* InitializeData() {
       if (UsingInlinedStorage(size())) {
         InlinedStorage::AnnotateConstruct(size());
@@ -489,12 +492,14 @@ class FixedArray {
   Storage storage_;
 };
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 template <typename T, size_t N, typename A>
 constexpr size_t FixedArray<T, N, A>::kInlineBytesDefault;
 
 template <typename T, size_t N, typename A>
 constexpr typename FixedArray<T, N, A>::size_type
     FixedArray<T, N, A>::inline_elements;
+#endif
 
 template <typename T, size_t N, typename A>
 void FixedArray<T, N, A>::NonEmptyInlinedStorage::AnnotateConstruct(
diff --git a/third_party/abseil-cpp/absl/container/fixed_array_benchmark.cc b/third_party/abseil-cpp/absl/container/fixed_array_benchmark.cc
index 3c7a5a7234..db6663e60d 100644
--- a/third_party/abseil-cpp/absl/container/fixed_array_benchmark.cc
+++ b/third_party/abseil-cpp/absl/container/fixed_array_benchmark.cc
@@ -16,8 +16,8 @@
 
 #include <string>
 
-#include "benchmark/benchmark.h"
 #include "absl/container/fixed_array.h"
+#include "benchmark/benchmark.h"
 
 namespace {
 
diff --git a/third_party/abseil-cpp/absl/container/flat_hash_map.h b/third_party/abseil-cpp/absl/container/flat_hash_map.h
index 74def0df0e..e6bdbd9e4f 100644
--- a/third_party/abseil-cpp/absl/container/flat_hash_map.h
+++ b/third_party/abseil-cpp/absl/container/flat_hash_map.h
@@ -36,6 +36,7 @@
 #include <utility>
 
 #include "absl/algorithm/container.h"
+#include "absl/base/macros.h"
 #include "absl/container/internal/container_memory.h"
 #include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
 #include "absl/container/internal/raw_hash_map.h"  // IWYU pragma: export
@@ -75,6 +76,10 @@ struct FlatHashMapPolicy;
 // absl/hash/hash.h for information on extending Abseil hashing to user-defined
 // types.
 //
+// Using `absl::flat_hash_map` at interface boundaries in dynamically loaded
+// libraries (e.g. .dll, .so) is unsupported due to way `absl::Hash` values may
+// be randomized across dynamically loaded libraries.
+//
 // NOTE: A `flat_hash_map` stores its value types directly inside its
 // implementation array to avoid memory indirection. Because a `flat_hash_map`
 // is designed to move data when rehashed, map values will not retain pointer
@@ -356,8 +361,8 @@ class flat_hash_map : public absl::container_internal::raw_hash_map<
   // `flat_hash_map`.
   //
   //   iterator try_emplace(const_iterator hint,
-  //                        const init_type& k, Args&&... args):
-  //   iterator try_emplace(const_iterator hint, init_type&& k, Args&&... args):
+  //                        const key_type& k, Args&&... args):
+  //   iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args):
   //
   // Inserts (via copy or move) the element of the specified key into the
   // `flat_hash_map` using the position of `hint` as a non-binding suggestion
@@ -541,10 +546,12 @@ class flat_hash_map : public absl::container_internal::raw_hash_map<
 // erase_if(flat_hash_map<>, Pred)
 //
 // Erases all elements that satisfy the predicate `pred` from the container `c`.
+// Returns the number of erased elements.
 template <typename K, typename V, typename H, typename E, typename A,
           typename Predicate>
-void erase_if(flat_hash_map<K, V, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
+typename flat_hash_map<K, V, H, E, A>::size_type erase_if(
+    flat_hash_map<K, V, H, E, A>& c, Predicate pred) {
+  return container_internal::EraseIf(pred, &c);
 }
 
 namespace container_internal {
diff --git a/third_party/abseil-cpp/absl/container/flat_hash_map_test.cc b/third_party/abseil-cpp/absl/container/flat_hash_map_test.cc
index 8dda1d3539..263951f1d8 100644
--- a/third_party/abseil-cpp/absl/container/flat_hash_map_test.cc
+++ b/third_party/abseil-cpp/absl/container/flat_hash_map_test.cc
@@ -236,33 +236,36 @@ TEST(FlatHashMap, EraseIf) {
   // Erase all elements.
   {
     flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return true; });
+    EXPECT_EQ(erase_if(s, [](std::pair<const int, int>) { return true; }), 5);
     EXPECT_THAT(s, IsEmpty());
   }
   // Erase no elements.
   {
     flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return false; });
+    EXPECT_EQ(erase_if(s, [](std::pair<const int, int>) { return false; }), 0);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3),
                                         Pair(4, 4), Pair(5, 5)));
   }
   // Erase specific elements.
   {
     flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s,
-             [](std::pair<const int, int> kvp) { return kvp.first % 2 == 1; });
+    EXPECT_EQ(erase_if(s,
+                       [](std::pair<const int, int> kvp) {
+                         return kvp.first % 2 == 1;
+                       }),
+              3);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(2, 2), Pair(4, 4)));
   }
   // Predicate is function reference.
   {
     flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, FirstIsEven);
+    EXPECT_EQ(erase_if(s, FirstIsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
   }
   // Predicate is function pointer.
   {
     flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, &FirstIsEven);
+    EXPECT_EQ(erase_if(s, &FirstIsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
   }
 }
diff --git a/third_party/abseil-cpp/absl/container/flat_hash_set.h b/third_party/abseil-cpp/absl/container/flat_hash_set.h
index 6b89da6571..f5376f991a 100644
--- a/third_party/abseil-cpp/absl/container/flat_hash_set.h
+++ b/third_party/abseil-cpp/absl/container/flat_hash_set.h
@@ -67,11 +67,15 @@ struct FlatHashSetPolicy;
 //
 // By default, `flat_hash_set` uses the `absl::Hash` hashing framework. All
 // fundamental and Abseil types that support the `absl::Hash` framework have a
-// compatible equality operator for comparing insertions into `flat_hash_map`.
+// compatible equality operator for comparing insertions into `flat_hash_set`.
 // If your type is not yet supported by the `absl::Hash` framework, see
 // absl/hash/hash.h for information on extending Abseil hashing to user-defined
 // types.
 //
+// Using `absl::flat_hash_set` at interface boundaries in dynamically loaded
+// libraries (e.g. .dll, .so) is unsupported due to way `absl::Hash` values may
+// be randomized across dynamically loaded libraries.
+//
 // NOTE: A `flat_hash_set` stores its keys directly inside its implementation
 // array to avoid memory indirection. Because a `flat_hash_set` is designed to
 // move data when rehashed, set keys will not retain pointer stability. If you
@@ -106,7 +110,7 @@ class flat_hash_set
  public:
   // Constructors and Assignment Operators
   //
-  // A flat_hash_set supports the same overload set as `std::unordered_map`
+  // A flat_hash_set supports the same overload set as `std::unordered_set`
   // for construction and assignment:
   //
   // *  Default constructor
@@ -173,7 +177,7 @@ class flat_hash_set
   // available within the `flat_hash_set`.
   //
   // NOTE: this member function is particular to `absl::flat_hash_set` and is
-  // not provided in the `std::unordered_map` API.
+  // not provided in the `std::unordered_set` API.
   using Base::capacity;
 
   // flat_hash_set::empty()
@@ -332,7 +336,7 @@ class flat_hash_set
   // flat_hash_set::swap(flat_hash_set& other)
   //
   // Exchanges the contents of this `flat_hash_set` with those of the `other`
-  // flat hash map, avoiding invocation of any move, copy, or swap operations on
+  // flat hash set, avoiding invocation of any move, copy, or swap operations on
   // individual elements.
   //
   // All iterators and references on the `flat_hash_set` remain valid, excepting
@@ -340,7 +344,7 @@ class flat_hash_set
   //
   // `swap()` requires that the flat hash set's hashing and key equivalence
   // functions be Swappable, and are exchaged using unqualified calls to
-  // non-member `swap()`. If the map's allocator has
+  // non-member `swap()`. If the set's allocator has
   // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value`
   // set to `true`, the allocators are also exchanged using an unqualified call
   // to non-member `swap()`; otherwise, the allocators are not swapped.
@@ -395,14 +399,14 @@ class flat_hash_set
   // flat_hash_set::bucket_count()
   //
   // Returns the number of "buckets" within the `flat_hash_set`. Note that
-  // because a flat hash map contains all elements within its internal storage,
+  // because a flat hash set contains all elements within its internal storage,
   // this value simply equals the current capacity of the `flat_hash_set`.
   using Base::bucket_count;
 
   // flat_hash_set::load_factor()
   //
   // Returns the current load factor of the `flat_hash_set` (the average number
-  // of slots occupied with a value within the hash map).
+  // of slots occupied with a value within the hash set).
   using Base::load_factor;
 
   // flat_hash_set::max_load_factor()
@@ -443,9 +447,11 @@ class flat_hash_set
 // erase_if(flat_hash_set<>, Pred)
 //
 // Erases all elements that satisfy the predicate `pred` from the container `c`.
+// Returns the number of erased elements.
 template <typename T, typename H, typename E, typename A, typename Predicate>
-void erase_if(flat_hash_set<T, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
+typename flat_hash_set<T, H, E, A>::size_type erase_if(
+    flat_hash_set<T, H, E, A>& c, Predicate pred) {
+  return container_internal::EraseIf(pred, &c);
 }
 
 namespace container_internal {
@@ -468,13 +474,6 @@ struct FlatHashSetPolicy {
     absl::allocator_traits<Allocator>::destroy(*alloc, slot);
   }
 
-  template <class Allocator>
-  static void transfer(Allocator* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    construct(alloc, new_slot, std::move(*old_slot));
-    destroy(alloc, old_slot);
-  }
-
   static T& element(slot_type* slot) { return *slot; }
 
   template <class F, class... Args>
diff --git a/third_party/abseil-cpp/absl/container/flat_hash_set_test.cc b/third_party/abseil-cpp/absl/container/flat_hash_set_test.cc
index 8f6f9944ca..b6a72a20a3 100644
--- a/third_party/abseil-cpp/absl/container/flat_hash_set_test.cc
+++ b/third_party/abseil-cpp/absl/container/flat_hash_set_test.cc
@@ -143,31 +143,31 @@ TEST(FlatHashSet, EraseIf) {
   // Erase all elements.
   {
     flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return true; });
+    EXPECT_EQ(erase_if(s, [](int) { return true; }), 5);
     EXPECT_THAT(s, IsEmpty());
   }
   // Erase no elements.
   {
     flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return false; });
+    EXPECT_EQ(erase_if(s, [](int) { return false; }), 0);
     EXPECT_THAT(s, UnorderedElementsAre(1, 2, 3, 4, 5));
   }
   // Erase specific elements.
   {
     flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int k) { return k % 2 == 1; });
+    EXPECT_EQ(erase_if(s, [](int k) { return k % 2 == 1; }), 3);
     EXPECT_THAT(s, UnorderedElementsAre(2, 4));
   }
   // Predicate is function reference.
   {
     flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, IsEven);
+    EXPECT_EQ(erase_if(s, IsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
   }
   // Predicate is function pointer.
   {
     flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, &IsEven);
+    EXPECT_EQ(erase_if(s, &IsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
   }
 }
diff --git a/third_party/abseil-cpp/absl/container/inlined_vector.h b/third_party/abseil-cpp/absl/container/inlined_vector.h
index df9e09917d..15616001b9 100644
--- a/third_party/abseil-cpp/absl/container/inlined_vector.h
+++ b/third_party/abseil-cpp/absl/container/inlined_vector.h
@@ -36,7 +36,6 @@
 #define ABSL_CONTAINER_INLINED_VECTOR_H_
 
 #include <algorithm>
-#include <cassert>
 #include <cstddef>
 #include <cstdlib>
 #include <cstring>
@@ -53,6 +52,7 @@
 #include "absl/base/port.h"
 #include "absl/container/internal/inlined_vector.h"
 #include "absl/memory/memory.h"
+#include "absl/meta/type_traits.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -78,6 +78,8 @@ class InlinedVector {
   using MoveIterator = inlined_vector_internal::MoveIterator<TheA>;
   template <typename TheA>
   using IsMemcpyOk = inlined_vector_internal::IsMemcpyOk<TheA>;
+  template <typename TheA>
+  using IsMoveAssignOk = inlined_vector_internal::IsMoveAssignOk<TheA>;
 
   template <typename TheA, typename Iterator>
   using IteratorValueAdapter =
@@ -95,6 +97,12 @@ class InlinedVector {
   using DisableIfAtLeastForwardIterator = absl::enable_if_t<
       !inlined_vector_internal::IsAtLeastForwardIterator<Iterator>::value, int>;
 
+  using MemcpyPolicy = typename Storage::MemcpyPolicy;
+  using ElementwiseAssignPolicy = typename Storage::ElementwiseAssignPolicy;
+  using ElementwiseConstructPolicy =
+      typename Storage::ElementwiseConstructPolicy;
+  using MoveAssignmentPolicy = typename Storage::MoveAssignmentPolicy;
+
  public:
   using allocator_type = A;
   using value_type = inlined_vector_internal::ValueType<A>;
@@ -152,7 +160,7 @@ class InlinedVector {
                 const allocator_type& allocator = allocator_type())
       : storage_(allocator) {
     storage_.Initialize(IteratorValueAdapter<A, ForwardIterator>(first),
-                        std::distance(first, last));
+                        static_cast<size_t>(std::distance(first, last)));
   }
 
   // Creates an inlined vector with elements constructed from the provided input
@@ -233,8 +241,8 @@ class InlinedVector {
   // specified allocator is also `noexcept`.
   InlinedVector(
       InlinedVector&& other,
-      const allocator_type& allocator)
-      noexcept(absl::allocator_is_nothrow<allocator_type>::value)
+      const allocator_type&
+          allocator) noexcept(absl::allocator_is_nothrow<allocator_type>::value)
       : storage_(allocator) {
     if (IsMemcpyOk<A>::value) {
       storage_.MemcpyFrom(other.storage_);
@@ -276,8 +284,10 @@ class InlinedVector {
   size_type max_size() const noexcept {
     // One bit of the size storage is used to indicate whether the inlined
     // vector contains allocated memory. As a result, the maximum size that the
-    // inlined vector can express is half of the max for `size_type`.
-    return (std::numeric_limits<size_type>::max)() / 2;
+    // inlined vector can express is the minimum of the limit of how many
+    // objects we can allocate and std::numeric_limits<size_type>::max() / 2.
+    return (std::min)(AllocatorTraits<A>::max_size(storage_.GetAllocator()),
+                      (std::numeric_limits<size_type>::max)() / 2);
   }
 
   // `InlinedVector::capacity()`
@@ -485,18 +495,7 @@ class InlinedVector {
   // unspecified state.
   InlinedVector& operator=(InlinedVector&& other) {
     if (ABSL_PREDICT_TRUE(this != std::addressof(other))) {
-      if (IsMemcpyOk<A>::value || other.storage_.GetIsAllocated()) {
-        inlined_vector_internal::DestroyElements<A>(storage_.GetAllocator(),
-                                                    data(), size());
-        storage_.DeallocateIfAllocated();
-        storage_.MemcpyFrom(other.storage_);
-
-        other.storage_.SetInlinedSize(0);
-      } else {
-        storage_.Assign(IteratorValueAdapter<A, MoveIterator<A>>(
-                            MoveIterator<A>(other.storage_.GetInlinedData())),
-                        other.size());
-      }
+      MoveAssignment(MoveAssignmentPolicy{}, std::move(other));
     }
 
     return *this;
@@ -523,7 +522,7 @@ class InlinedVector {
             EnableIfAtLeastForwardIterator<ForwardIterator> = 0>
   void assign(ForwardIterator first, ForwardIterator last) {
     storage_.Assign(IteratorValueAdapter<A, ForwardIterator>(first),
-                    std::distance(first, last));
+                    static_cast<size_t>(std::distance(first, last)));
   }
 
   // Overload of `InlinedVector::assign(...)` to replace the contents of the
@@ -586,8 +585,20 @@ class InlinedVector {
 
     if (ABSL_PREDICT_TRUE(n != 0)) {
       value_type dealias = v;
+      // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102329#c2
+      // It appears that GCC thinks that since `pos` is a const pointer and may
+      // point to uninitialized memory at this point, a warning should be
+      // issued. But `pos` is actually only used to compute an array index to
+      // write to.
+#if !defined(__clang__) && defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
       return storage_.Insert(pos, CopyValueAdapter<A>(std::addressof(dealias)),
                              n);
+#if !defined(__clang__) && defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
     } else {
       return const_cast<iterator>(pos);
     }
@@ -613,9 +624,9 @@ class InlinedVector {
     ABSL_HARDENING_ASSERT(pos <= end());
 
     if (ABSL_PREDICT_TRUE(first != last)) {
-      return storage_.Insert(pos,
-                             IteratorValueAdapter<A, ForwardIterator>(first),
-                             std::distance(first, last));
+      return storage_.Insert(
+          pos, IteratorValueAdapter<A, ForwardIterator>(first),
+          static_cast<size_type>(std::distance(first, last)));
     } else {
       return const_cast<iterator>(pos);
     }
@@ -632,7 +643,7 @@ class InlinedVector {
     ABSL_HARDENING_ASSERT(pos >= begin());
     ABSL_HARDENING_ASSERT(pos <= end());
 
-    size_type index = std::distance(cbegin(), pos);
+    size_type index = static_cast<size_type>(std::distance(cbegin(), pos));
     for (size_type i = index; first != last; ++i, static_cast<void>(++first)) {
       insert(data() + i, *first);
     }
@@ -721,8 +732,8 @@ class InlinedVector {
   // Destroys all elements in the inlined vector, setting the size to `0` and
   // deallocating any held memory.
   void clear() noexcept {
-    inlined_vector_internal::DestroyElements<A>(storage_.GetAllocator(), data(),
-                                                size());
+    inlined_vector_internal::DestroyAdapter<A>::DestroyElements(
+        storage_.GetAllocator(), data(), size());
     storage_.DeallocateIfAllocated();
 
     storage_.SetInlinedSize(0);
@@ -760,6 +771,42 @@ class InlinedVector {
   template <typename H, typename TheT, size_t TheN, typename TheA>
   friend H AbslHashValue(H h, const absl::InlinedVector<TheT, TheN, TheA>& a);
 
+  void MoveAssignment(MemcpyPolicy, InlinedVector&& other) {
+    inlined_vector_internal::DestroyAdapter<A>::DestroyElements(
+        storage_.GetAllocator(), data(), size());
+    storage_.DeallocateIfAllocated();
+    storage_.MemcpyFrom(other.storage_);
+
+    other.storage_.SetInlinedSize(0);
+  }
+
+  void MoveAssignment(ElementwiseAssignPolicy, InlinedVector&& other) {
+    if (other.storage_.GetIsAllocated()) {
+      MoveAssignment(MemcpyPolicy{}, std::move(other));
+    } else {
+      storage_.Assign(IteratorValueAdapter<A, MoveIterator<A>>(
+                          MoveIterator<A>(other.storage_.GetInlinedData())),
+                      other.size());
+    }
+  }
+
+  void MoveAssignment(ElementwiseConstructPolicy, InlinedVector&& other) {
+    if (other.storage_.GetIsAllocated()) {
+      MoveAssignment(MemcpyPolicy{}, std::move(other));
+    } else {
+      inlined_vector_internal::DestroyAdapter<A>::DestroyElements(
+          storage_.GetAllocator(), data(), size());
+      storage_.DeallocateIfAllocated();
+
+      IteratorValueAdapter<A, MoveIterator<A>> other_values(
+          MoveIterator<A>(other.storage_.GetInlinedData()));
+      inlined_vector_internal::ConstructElements<A>(
+          storage_.GetAllocator(), storage_.GetInlinedData(), other_values,
+          other.storage_.GetSize());
+      storage_.SetInlinedSize(other.storage_.GetSize());
+    }
+  }
+
   Storage storage_;
 };
 
diff --git a/third_party/abseil-cpp/absl/container/inlined_vector_benchmark.cc b/third_party/abseil-cpp/absl/container/inlined_vector_benchmark.cc
index e256fad60f..56a6bfd23a 100644
--- a/third_party/abseil-cpp/absl/container/inlined_vector_benchmark.cc
+++ b/third_party/abseil-cpp/absl/container/inlined_vector_benchmark.cc
@@ -16,11 +16,11 @@
 #include <string>
 #include <vector>
 
-#include "benchmark/benchmark.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/base/macros.h"
 #include "absl/container/inlined_vector.h"
 #include "absl/strings/str_cat.h"
+#include "benchmark/benchmark.h"
 
 namespace {
 
diff --git a/third_party/abseil-cpp/absl/container/inlined_vector_test.cc b/third_party/abseil-cpp/absl/container/inlined_vector_test.cc
index 98aff33498..1dc6c81b96 100644
--- a/third_party/abseil-cpp/absl/container/inlined_vector_test.cc
+++ b/third_party/abseil-cpp/absl/container/inlined_vector_test.cc
@@ -16,12 +16,14 @@
 
 #include <algorithm>
 #include <forward_list>
+#include <iterator>
 #include <list>
 #include <memory>
 #include <scoped_allocator>
 #include <sstream>
 #include <stdexcept>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "gmock/gmock.h"
@@ -49,6 +51,7 @@ using testing::ElementsAre;
 using testing::ElementsAreArray;
 using testing::Eq;
 using testing::Gt;
+using testing::Pointwise;
 using testing::PrintToString;
 
 using IntVec = absl::InlinedVector<int, 8>;
@@ -126,20 +129,20 @@ using DynamicVec = absl::InlinedVector<Dynamic, 8>;
 
 // Append 0..len-1 to *v
 template <typename Container>
-static void Fill(Container* v, int len, int offset = 0) {
-  for (int i = 0; i < len; i++) {
-    v->push_back(i + offset);
+static void Fill(Container* v, size_t len, int offset = 0) {
+  for (size_t i = 0; i < len; i++) {
+    v->push_back(static_cast<int>(i) + offset);
   }
 }
 
-static IntVec Fill(int len, int offset = 0) {
+static IntVec Fill(size_t len, int offset = 0) {
   IntVec v;
   Fill(&v, len, offset);
   return v;
 }
 
 TEST(IntVec, SimpleOps) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v;
     const IntVec& cv = v;  // const alias
 
@@ -147,42 +150,42 @@ TEST(IntVec, SimpleOps) {
     EXPECT_EQ(len, v.size());
     EXPECT_LE(len, v.capacity());
 
-    for (int i = 0; i < len; i++) {
-      EXPECT_EQ(i, v[i]);
-      EXPECT_EQ(i, v.at(i));
+    for (size_t i = 0; i < len; i++) {
+      EXPECT_EQ(static_cast<int>(i), v[i]);
+      EXPECT_EQ(static_cast<int>(i), v.at(i));
     }
     EXPECT_EQ(v.begin(), v.data());
     EXPECT_EQ(cv.begin(), cv.data());
 
-    int counter = 0;
+    size_t counter = 0;
     for (IntVec::iterator iter = v.begin(); iter != v.end(); ++iter) {
-      EXPECT_EQ(counter, *iter);
+      EXPECT_EQ(static_cast<int>(counter), *iter);
       counter++;
     }
     EXPECT_EQ(counter, len);
 
     counter = 0;
     for (IntVec::const_iterator iter = v.begin(); iter != v.end(); ++iter) {
-      EXPECT_EQ(counter, *iter);
+      EXPECT_EQ(static_cast<int>(counter), *iter);
       counter++;
     }
     EXPECT_EQ(counter, len);
 
     counter = 0;
     for (IntVec::const_iterator iter = v.cbegin(); iter != v.cend(); ++iter) {
-      EXPECT_EQ(counter, *iter);
+      EXPECT_EQ(static_cast<int>(counter), *iter);
       counter++;
     }
     EXPECT_EQ(counter, len);
 
     if (len > 0) {
       EXPECT_EQ(0, v.front());
-      EXPECT_EQ(len - 1, v.back());
+      EXPECT_EQ(static_cast<int>(len - 1), v.back());
       v.pop_back();
       EXPECT_EQ(len - 1, v.size());
-      for (int i = 0; i < v.size(); ++i) {
-        EXPECT_EQ(i, v[i]);
-        EXPECT_EQ(i, v.at(i));
+      for (size_t i = 0; i < v.size(); ++i) {
+        EXPECT_EQ(static_cast<int>(i), v[i]);
+        EXPECT_EQ(static_cast<int>(i), v.at(i));
       }
     }
   }
@@ -191,7 +194,7 @@ TEST(IntVec, SimpleOps) {
 TEST(IntVec, PopBackNoOverflow) {
   IntVec v = {1};
   v.pop_back();
-  EXPECT_EQ(v.size(), 0);
+  EXPECT_EQ(v.size(), 0u);
 }
 
 TEST(IntVec, AtThrows) {
@@ -202,47 +205,47 @@ TEST(IntVec, AtThrows) {
 }
 
 TEST(IntVec, ReverseIterator) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v;
     Fill(&v, len);
 
-    int counter = len;
+    size_t counter = len;
     for (IntVec::reverse_iterator iter = v.rbegin(); iter != v.rend(); ++iter) {
       counter--;
-      EXPECT_EQ(counter, *iter);
+      EXPECT_EQ(static_cast<int>(counter), *iter);
     }
-    EXPECT_EQ(counter, 0);
+    EXPECT_EQ(counter, 0u);
 
     counter = len;
     for (IntVec::const_reverse_iterator iter = v.rbegin(); iter != v.rend();
          ++iter) {
       counter--;
-      EXPECT_EQ(counter, *iter);
+      EXPECT_EQ(static_cast<int>(counter), *iter);
     }
-    EXPECT_EQ(counter, 0);
+    EXPECT_EQ(counter, 0u);
 
     counter = len;
     for (IntVec::const_reverse_iterator iter = v.crbegin(); iter != v.crend();
          ++iter) {
       counter--;
-      EXPECT_EQ(counter, *iter);
+      EXPECT_EQ(static_cast<int>(counter), *iter);
     }
-    EXPECT_EQ(counter, 0);
+    EXPECT_EQ(counter, 0u);
   }
 }
 
 TEST(IntVec, Erase) {
-  for (int len = 1; len < 20; len++) {
-    for (int i = 0; i < len; ++i) {
+  for (size_t len = 1; len < 20; len++) {
+    for (size_t i = 0; i < len; ++i) {
       IntVec v;
       Fill(&v, len);
       v.erase(v.begin() + i);
       EXPECT_EQ(len - 1, v.size());
-      for (int j = 0; j < i; ++j) {
-        EXPECT_EQ(j, v[j]);
+      for (size_t j = 0; j < i; ++j) {
+        EXPECT_EQ(static_cast<int>(j), v[j]);
       }
-      for (int j = i; j < len - 1; ++j) {
-        EXPECT_EQ(j + 1, v[j]);
+      for (size_t j = i; j < len - 1; ++j) {
+        EXPECT_EQ(static_cast<int>(j + 1), v[j]);
       }
     }
   }
@@ -254,7 +257,8 @@ TEST(IntVec, Hardened) {
   EXPECT_EQ(v[9], 9);
 #if !defined(NDEBUG) || ABSL_OPTION_HARDENED
   EXPECT_DEATH_IF_SUPPORTED(v[10], "");
-  EXPECT_DEATH_IF_SUPPORTED(v[-1], "");
+  EXPECT_DEATH_IF_SUPPORTED(v[static_cast<size_t>(-1)], "");
+  EXPECT_DEATH_IF_SUPPORTED(v.resize(v.max_size() + 1), "");
 #endif
 }
 
@@ -262,43 +266,43 @@ TEST(IntVec, Hardened) {
 // should have reference counts == 0, and all others elements should have
 // reference counts == 1.
 TEST(RefCountedVec, EraseBeginEnd) {
-  for (int len = 1; len < 20; ++len) {
-    for (int erase_begin = 0; erase_begin < len; ++erase_begin) {
-      for (int erase_end = erase_begin; erase_end <= len; ++erase_end) {
+  for (size_t len = 1; len < 20; ++len) {
+    for (size_t erase_begin = 0; erase_begin < len; ++erase_begin) {
+      for (size_t erase_end = erase_begin; erase_end <= len; ++erase_end) {
         std::vector<int> counts(len, 0);
         RefCountedVec v;
-        for (int i = 0; i < len; ++i) {
-          v.push_back(RefCounted(i, &counts[i]));
+        for (size_t i = 0; i < len; ++i) {
+          v.push_back(RefCounted(static_cast<int>(i), &counts[i]));
         }
 
-        int erase_len = erase_end - erase_begin;
+        size_t erase_len = erase_end - erase_begin;
 
         v.erase(v.begin() + erase_begin, v.begin() + erase_end);
 
         EXPECT_EQ(len - erase_len, v.size());
 
         // Check the elements before the first element erased.
-        for (int i = 0; i < erase_begin; ++i) {
-          EXPECT_EQ(i, v[i].value_);
+        for (size_t i = 0; i < erase_begin; ++i) {
+          EXPECT_EQ(static_cast<int>(i), v[i].value_);
         }
 
         // Check the elements after the first element erased.
-        for (int i = erase_begin; i < v.size(); ++i) {
-          EXPECT_EQ(i + erase_len, v[i].value_);
+        for (size_t i = erase_begin; i < v.size(); ++i) {
+          EXPECT_EQ(static_cast<int>(i + erase_len), v[i].value_);
         }
 
         // Check that the elements at the beginning are preserved.
-        for (int i = 0; i < erase_begin; ++i) {
+        for (size_t i = 0; i < erase_begin; ++i) {
           EXPECT_EQ(1, counts[i]);
         }
 
         // Check that the erased elements are destroyed
-        for (int i = erase_begin; i < erase_end; ++i) {
+        for (size_t i = erase_begin; i < erase_end; ++i) {
           EXPECT_EQ(0, counts[i]);
         }
 
         // Check that the elements at the end are preserved.
-        for (int i = erase_end; i < len; ++i) {
+        for (size_t i = erase_end; i < len; ++i) {
           EXPECT_EQ(1, counts[i]);
         }
       }
@@ -377,21 +381,21 @@ TEST(InlinedVectorTest, ShrinkToFitGrowingVector) {
   absl::InlinedVector<std::pair<std::string, int>, 1> v;
 
   v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 1);
+  EXPECT_EQ(v.capacity(), 1u);
 
   v.emplace_back("answer", 42);
   v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 1);
+  EXPECT_EQ(v.capacity(), 1u);
 
   v.emplace_back("taxicab", 1729);
-  EXPECT_GE(v.capacity(), 2);
+  EXPECT_GE(v.capacity(), 2u);
   v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 2);
+  EXPECT_EQ(v.capacity(), 2u);
 
   v.reserve(100);
-  EXPECT_GE(v.capacity(), 100);
+  EXPECT_GE(v.capacity(), 100u);
   v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 2);
+  EXPECT_EQ(v.capacity(), 2u);
 }
 
 TEST(InlinedVectorTest, ShrinkToFitEdgeCases) {
@@ -399,10 +403,10 @@ TEST(InlinedVectorTest, ShrinkToFitEdgeCases) {
     absl::InlinedVector<std::pair<std::string, int>, 1> v;
     v.emplace_back("answer", 42);
     v.emplace_back("taxicab", 1729);
-    EXPECT_GE(v.capacity(), 2);
+    EXPECT_GE(v.capacity(), 2u);
     v.pop_back();
     v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 1);
+    EXPECT_EQ(v.capacity(), 1u);
     EXPECT_EQ(v[0].first, "answer");
     EXPECT_EQ(v[0].second, 42);
   }
@@ -411,34 +415,34 @@ TEST(InlinedVectorTest, ShrinkToFitEdgeCases) {
     absl::InlinedVector<std::string, 2> v(100);
     v.resize(0);
     v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 2);  // inlined capacity
+    EXPECT_EQ(v.capacity(), 2u);  // inlined capacity
   }
 
   {
     absl::InlinedVector<std::string, 2> v(100);
     v.resize(1);
     v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 2);  // inlined capacity
+    EXPECT_EQ(v.capacity(), 2u);  // inlined capacity
   }
 
   {
     absl::InlinedVector<std::string, 2> v(100);
     v.resize(2);
     v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 2);
+    EXPECT_EQ(v.capacity(), 2u);
   }
 
   {
     absl::InlinedVector<std::string, 2> v(100);
     v.resize(3);
     v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 3);
+    EXPECT_EQ(v.capacity(), 3u);
   }
 }
 
 TEST(IntVec, Insert) {
-  for (int len = 0; len < 20; len++) {
-    for (int pos = 0; pos <= len; pos++) {
+  for (size_t len = 0; len < 20; len++) {
+    for (ptrdiff_t pos = 0; pos <= static_cast<ptrdiff_t>(len); pos++) {
       {
         // Single element
         std::vector<int> std_v;
@@ -526,16 +530,16 @@ TEST(IntVec, Insert) {
 TEST(RefCountedVec, InsertConstructorDestructor) {
   // Make sure the proper construction/destruction happen during insert
   // operations.
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     SCOPED_TRACE(len);
-    for (int pos = 0; pos <= len; pos++) {
+    for (size_t pos = 0; pos <= len; pos++) {
       SCOPED_TRACE(pos);
       std::vector<int> counts(len, 0);
       int inserted_count = 0;
       RefCountedVec v;
-      for (int i = 0; i < len; ++i) {
+      for (size_t i = 0; i < len; ++i) {
         SCOPED_TRACE(i);
-        v.push_back(RefCounted(i, &counts[i]));
+        v.push_back(RefCounted(static_cast<int>(i), &counts[i]));
       }
 
       EXPECT_THAT(counts, Each(Eq(1)));
@@ -552,20 +556,20 @@ TEST(RefCountedVec, InsertConstructorDestructor) {
 }
 
 TEST(IntVec, Resize) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v;
     Fill(&v, len);
 
     // Try resizing up and down by k elements
     static const int kResizeElem = 1000000;
-    for (int k = 0; k < 10; k++) {
+    for (size_t k = 0; k < 10; k++) {
       // Enlarging resize
       v.resize(len + k, kResizeElem);
       EXPECT_EQ(len + k, v.size());
       EXPECT_LE(len + k, v.capacity());
-      for (int i = 0; i < len + k; i++) {
+      for (size_t i = 0; i < len + k; i++) {
         if (i < len) {
-          EXPECT_EQ(i, v[i]);
+          EXPECT_EQ(static_cast<int>(i), v[i]);
         } else {
           EXPECT_EQ(kResizeElem, v[i]);
         }
@@ -575,26 +579,26 @@ TEST(IntVec, Resize) {
       v.resize(len, kResizeElem);
       EXPECT_EQ(len, v.size());
       EXPECT_LE(len, v.capacity());
-      for (int i = 0; i < len; i++) {
-        EXPECT_EQ(i, v[i]);
+      for (size_t i = 0; i < len; i++) {
+        EXPECT_EQ(static_cast<int>(i), v[i]);
       }
     }
   }
 }
 
 TEST(IntVec, InitWithLength) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v(len, 7);
     EXPECT_EQ(len, v.size());
     EXPECT_LE(len, v.capacity());
-    for (int i = 0; i < len; i++) {
+    for (size_t i = 0; i < len; i++) {
       EXPECT_EQ(7, v[i]);
     }
   }
 }
 
 TEST(IntVec, CopyConstructorAndAssignment) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v;
     Fill(&v, len);
     EXPECT_EQ(len, v.size());
@@ -603,7 +607,7 @@ TEST(IntVec, CopyConstructorAndAssignment) {
     IntVec v2(v);
     EXPECT_TRUE(v == v2) << PrintToString(v) << PrintToString(v2);
 
-    for (int start_len = 0; start_len < 20; start_len++) {
+    for (size_t start_len = 0; start_len < 20; start_len++) {
       IntVec v3;
       Fill(&v3, start_len, 99);  // Add dummy elements that should go away
       v3 = v;
@@ -613,7 +617,7 @@ TEST(IntVec, CopyConstructorAndAssignment) {
 }
 
 TEST(IntVec, AliasingCopyAssignment) {
-  for (int len = 0; len < 20; ++len) {
+  for (size_t len = 0; len < 20; ++len) {
     IntVec original;
     Fill(&original, len);
     IntVec dup = original;
@@ -623,9 +627,9 @@ TEST(IntVec, AliasingCopyAssignment) {
 }
 
 TEST(IntVec, MoveConstructorAndAssignment) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v_in;
-    const int inlined_capacity = v_in.capacity();
+    const size_t inlined_capacity = v_in.capacity();
     Fill(&v_in, len);
     EXPECT_EQ(len, v_in.size());
     EXPECT_LE(len, v_in.capacity());
@@ -642,7 +646,7 @@ TEST(IntVec, MoveConstructorAndAssignment) {
         EXPECT_FALSE(v_out.data() == old_data);
       }
     }
-    for (int start_len = 0; start_len < 20; start_len++) {
+    for (size_t start_len = 0; start_len < 20; start_len++) {
       IntVec v_out;
       Fill(&v_out, start_len, 99);  // Add dummy elements that should go away
       IntVec v_temp(v_in);
@@ -681,10 +685,10 @@ class NotTriviallyDestructible {
 };
 
 TEST(AliasingTest, Emplace) {
-  for (int i = 2; i < 20; ++i) {
+  for (size_t i = 2; i < 20; ++i) {
     absl::InlinedVector<NotTriviallyDestructible, 10> vec;
-    for (int j = 0; j < i; ++j) {
-      vec.push_back(NotTriviallyDestructible(j));
+    for (size_t j = 0; j < i; ++j) {
+      vec.push_back(NotTriviallyDestructible(static_cast<int>(j)));
     }
     vec.emplace(vec.begin(), vec[0]);
     EXPECT_EQ(vec[0], vec[1]);
@@ -696,12 +700,12 @@ TEST(AliasingTest, Emplace) {
 }
 
 TEST(AliasingTest, InsertWithCount) {
-  for (int i = 1; i < 20; ++i) {
+  for (size_t i = 1; i < 20; ++i) {
     absl::InlinedVector<NotTriviallyDestructible, 10> vec;
-    for (int j = 0; j < i; ++j) {
-      vec.push_back(NotTriviallyDestructible(j));
+    for (size_t j = 0; j < i; ++j) {
+      vec.push_back(NotTriviallyDestructible(static_cast<int>(j)));
     }
-    for (int n = 0; n < 5; ++n) {
+    for (size_t n = 0; n < 5; ++n) {
       // We use back where we can because it's guaranteed to become invalidated
       vec.insert(vec.begin(), n, vec.back());
       auto b = vec.begin();
@@ -759,22 +763,22 @@ TEST(OverheadTest, Storage) {
 }
 
 TEST(IntVec, Clear) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     SCOPED_TRACE(len);
     IntVec v;
     Fill(&v, len);
     v.clear();
-    EXPECT_EQ(0, v.size());
+    EXPECT_EQ(0u, v.size());
     EXPECT_EQ(v.begin(), v.end());
   }
 }
 
 TEST(IntVec, Reserve) {
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     IntVec v;
     Fill(&v, len);
 
-    for (int newlen = 0; newlen < 100; newlen++) {
+    for (size_t newlen = 0; newlen < 100; newlen++) {
       const int* start_rep = v.data();
       v.reserve(newlen);
       const int* final_rep = v.data();
@@ -841,9 +845,9 @@ TEST(StringVec, SelfMove) {
 }
 
 TEST(IntVec, Swap) {
-  for (int l1 = 0; l1 < 20; l1++) {
+  for (size_t l1 = 0; l1 < 20; l1++) {
     SCOPED_TRACE(l1);
-    for (int l2 = 0; l2 < 20; l2++) {
+    for (size_t l2 = 0; l2 < 20; l2++) {
       SCOPED_TRACE(l2);
       IntVec a = Fill(l1, 0);
       IntVec b = Fill(l2, 100);
@@ -853,13 +857,13 @@ TEST(IntVec, Swap) {
       }
       EXPECT_EQ(l1, b.size());
       EXPECT_EQ(l2, a.size());
-      for (int i = 0; i < l1; i++) {
+      for (size_t i = 0; i < l1; i++) {
         SCOPED_TRACE(i);
-        EXPECT_EQ(i, b[i]);
+        EXPECT_EQ(static_cast<int>(i), b[i]);
       }
-      for (int i = 0; i < l2; i++) {
+      for (size_t i = 0; i < l2; i++) {
         SCOPED_TRACE(i);
-        EXPECT_EQ(100 + i, a[i]);
+        EXPECT_EQ(100 + static_cast<int>(i), a[i]);
       }
     }
   }
@@ -868,46 +872,48 @@ TEST(IntVec, Swap) {
 TYPED_TEST_P(InstanceTest, Swap) {
   using Instance = TypeParam;
   using InstanceVec = absl::InlinedVector<Instance, 8>;
-  for (int l1 = 0; l1 < 20; l1++) {
+  for (size_t l1 = 0; l1 < 20; l1++) {
     SCOPED_TRACE(l1);
-    for (int l2 = 0; l2 < 20; l2++) {
+    for (size_t l2 = 0; l2 < 20; l2++) {
       SCOPED_TRACE(l2);
       InstanceTracker tracker;
       InstanceVec a, b;
       const size_t inlined_capacity = a.capacity();
       auto min_len = std::min(l1, l2);
       auto max_len = std::max(l1, l2);
-      for (int i = 0; i < l1; i++) a.push_back(Instance(i));
-      for (int i = 0; i < l2; i++) b.push_back(Instance(100 + i));
-      EXPECT_EQ(tracker.instances(), l1 + l2);
+      for (size_t i = 0; i < l1; i++)
+        a.push_back(Instance(static_cast<int>(i)));
+      for (size_t i = 0; i < l2; i++)
+        b.push_back(Instance(100 + static_cast<int>(i)));
+      EXPECT_EQ(tracker.instances(), static_cast<int>(l1 + l2));
       tracker.ResetCopiesMovesSwaps();
       {
         using std::swap;
         swap(a, b);
       }
-      EXPECT_EQ(tracker.instances(), l1 + l2);
+      EXPECT_EQ(tracker.instances(), static_cast<int>(l1 + l2));
       if (a.size() > inlined_capacity && b.size() > inlined_capacity) {
         EXPECT_EQ(tracker.swaps(), 0);  // Allocations are swapped.
         EXPECT_EQ(tracker.moves(), 0);
       } else if (a.size() <= inlined_capacity && b.size() <= inlined_capacity) {
-        EXPECT_EQ(tracker.swaps(), min_len);
+        EXPECT_EQ(tracker.swaps(), static_cast<int>(min_len));
         EXPECT_EQ((tracker.moves() ? tracker.moves() : tracker.copies()),
-                  max_len - min_len);
+                  static_cast<int>(max_len - min_len));
       } else {
         // One is allocated and the other isn't. The allocation is transferred
         // without copying elements, and the inlined instances are copied/moved.
         EXPECT_EQ(tracker.swaps(), 0);
         EXPECT_EQ((tracker.moves() ? tracker.moves() : tracker.copies()),
-                  min_len);
+                  static_cast<int>(min_len));
       }
 
       EXPECT_EQ(l1, b.size());
       EXPECT_EQ(l2, a.size());
-      for (int i = 0; i < l1; i++) {
-        EXPECT_EQ(i, b[i].value());
+      for (size_t i = 0; i < l1; i++) {
+        EXPECT_EQ(static_cast<int>(i), b[i].value());
       }
-      for (int i = 0; i < l2; i++) {
-        EXPECT_EQ(100 + i, a[i].value());
+      for (size_t i = 0; i < l2; i++) {
+        EXPECT_EQ(100 + static_cast<int>(i), a[i].value());
       }
     }
   }
@@ -936,9 +942,9 @@ TEST(IntVec, EqualAndNotEqual) {
 
   a.clear();
   b.clear();
-  for (int i = 0; i < 100; i++) {
-    a.push_back(i);
-    b.push_back(i);
+  for (size_t i = 0; i < 100; i++) {
+    a.push_back(static_cast<int>(i));
+    b.push_back(static_cast<int>(i));
     EXPECT_TRUE(a == b);
     EXPECT_FALSE(a != b);
 
@@ -977,26 +983,26 @@ TYPED_TEST_P(InstanceTest, CountConstructorsDestructors) {
   using Instance = TypeParam;
   using InstanceVec = absl::InlinedVector<Instance, 8>;
   InstanceTracker tracker;
-  for (int len = 0; len < 20; len++) {
+  for (size_t len = 0; len < 20; len++) {
     SCOPED_TRACE(len);
     tracker.ResetCopiesMovesSwaps();
 
     InstanceVec v;
     const size_t inlined_capacity = v.capacity();
-    for (int i = 0; i < len; i++) {
-      v.push_back(Instance(i));
+    for (size_t i = 0; i < len; i++) {
+      v.push_back(Instance(static_cast<int>(i)));
     }
-    EXPECT_EQ(tracker.instances(), len);
+    EXPECT_EQ(tracker.instances(), static_cast<int>(len));
     EXPECT_GE(tracker.copies() + tracker.moves(),
-              len);  // More due to reallocation.
+              static_cast<int>(len));  // More due to reallocation.
     tracker.ResetCopiesMovesSwaps();
 
     // Enlarging resize() must construct some objects
     tracker.ResetCopiesMovesSwaps();
     v.resize(len + 10, Instance(100));
-    EXPECT_EQ(tracker.instances(), len + 10);
+    EXPECT_EQ(tracker.instances(), static_cast<int>(len) + 10);
     if (len <= inlined_capacity && len + 10 > inlined_capacity) {
-      EXPECT_EQ(tracker.copies() + tracker.moves(), 10 + len);
+      EXPECT_EQ(tracker.copies() + tracker.moves(), 10 + static_cast<int>(len));
     } else {
       // Only specify a minimum number of copies + moves. We don't want to
       // depend on the reallocation policy here.
@@ -1007,29 +1013,30 @@ TYPED_TEST_P(InstanceTest, CountConstructorsDestructors) {
     // Shrinking resize() must destroy some objects
     tracker.ResetCopiesMovesSwaps();
     v.resize(len, Instance(100));
-    EXPECT_EQ(tracker.instances(), len);
+    EXPECT_EQ(tracker.instances(), static_cast<int>(len));
     EXPECT_EQ(tracker.copies(), 0);
     EXPECT_EQ(tracker.moves(), 0);
 
     // reserve() must not increase the number of initialized objects
     SCOPED_TRACE("reserve");
     v.reserve(len + 1000);
-    EXPECT_EQ(tracker.instances(), len);
-    EXPECT_EQ(tracker.copies() + tracker.moves(), len);
+    EXPECT_EQ(tracker.instances(), static_cast<int>(len));
+    EXPECT_EQ(tracker.copies() + tracker.moves(), static_cast<int>(len));
 
     // pop_back() and erase() must destroy one object
     if (len > 0) {
       tracker.ResetCopiesMovesSwaps();
       v.pop_back();
-      EXPECT_EQ(tracker.instances(), len - 1);
+      EXPECT_EQ(tracker.instances(), static_cast<int>(len) - 1);
       EXPECT_EQ(tracker.copies(), 0);
       EXPECT_EQ(tracker.moves(), 0);
 
       if (!v.empty()) {
         tracker.ResetCopiesMovesSwaps();
         v.erase(v.begin());
-        EXPECT_EQ(tracker.instances(), len - 2);
-        EXPECT_EQ(tracker.copies() + tracker.moves(), len - 2);
+        EXPECT_EQ(tracker.instances(), static_cast<int>(len) - 2);
+        EXPECT_EQ(tracker.copies() + tracker.moves(),
+                  static_cast<int>(len) - 2);
       }
     }
 
@@ -1086,12 +1093,12 @@ TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnMoveConstruction) {
     tracker.ResetCopiesMovesSwaps();
     {
       InstanceVec v_copy(std::move(v));
-      if (len > inlined_capacity) {
+      if (static_cast<size_t>(len) > inlined_capacity) {
         // Allocation is moved as a whole.
         EXPECT_EQ(tracker.instances(), len);
         EXPECT_EQ(tracker.live_instances(), len);
         // Tests an implementation detail, don't rely on this in your code.
-        EXPECT_EQ(v.size(), 0);  // NOLINT misc-use-after-move
+        EXPECT_EQ(v.size(), 0u);  // NOLINT misc-use-after-move
         EXPECT_EQ(tracker.copies(), 0);
         EXPECT_EQ(tracker.moves(), 0);
       } else {
@@ -1157,7 +1164,7 @@ TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnMoveAssignment) {
       tracker.ResetCopiesMovesSwaps();
 
       InstanceVec longer, shorter;
-      const int inlined_capacity = longer.capacity();
+      const size_t inlined_capacity = longer.capacity();
       for (int i = 0; i < len; i++) {
         longer.push_back(Instance(i));
         shorter.push_back(Instance(i));
@@ -1176,7 +1183,7 @@ TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnMoveAssignment) {
         src_len = len;
         longer = std::move(shorter);
       }
-      if (src_len > inlined_capacity) {
+      if (static_cast<size_t>(src_len) > inlined_capacity) {
         // Allocation moved as a whole.
         EXPECT_EQ(tracker.instances(), src_len);
         EXPECT_EQ(tracker.live_instances(), src_len);
@@ -1209,10 +1216,10 @@ TEST(CountElemAssign, SimpleTypeWithInlineBacking) {
     absl::InlinedVector<int, 2> v(original_contents.begin(),
                                   original_contents.end());
     v.assign(2, 123);
-    EXPECT_THAT(v, AllOf(SizeIs(2), ElementsAre(123, 123)));
+    EXPECT_THAT(v, AllOf(SizeIs(2u), ElementsAre(123, 123)));
     if (original_size <= 2) {
       // If the original had inline backing, it should stay inline.
-      EXPECT_EQ(2, v.capacity());
+      EXPECT_EQ(2u, v.capacity());
     }
   }
 }
@@ -1226,7 +1233,7 @@ TEST(CountElemAssign, SimpleTypeWithAllocation) {
     absl::InlinedVector<int, 2> v(original_contents.begin(),
                                   original_contents.end());
     v.assign(3, 123);
-    EXPECT_THAT(v, AllOf(SizeIs(3), ElementsAre(123, 123, 123)));
+    EXPECT_THAT(v, AllOf(SizeIs(3u), ElementsAre(123, 123, 123)));
     EXPECT_LE(v.size(), v.capacity());
   }
 }
@@ -1241,10 +1248,10 @@ TYPED_TEST_P(InstanceTest, CountElemAssignInlineBacking) {
     absl::InlinedVector<Instance, 2> v(original_contents.begin(),
                                        original_contents.end());
     v.assign(2, Instance(123));
-    EXPECT_THAT(v, AllOf(SizeIs(2), ElementsAre(ValueIs(123), ValueIs(123))));
+    EXPECT_THAT(v, AllOf(SizeIs(2u), ElementsAre(ValueIs(123), ValueIs(123))));
     if (original_size <= 2) {
       // If the original had inline backing, it should stay inline.
-      EXPECT_EQ(2, v.capacity());
+      EXPECT_EQ(2u, v.capacity());
     }
   }
 }
@@ -1259,8 +1266,8 @@ void InstanceCountElemAssignWithAllocationTest() {
     absl::InlinedVector<Instance, 2> v(original_contents.begin(),
                                        original_contents.end());
     v.assign(3, Instance(123));
-    EXPECT_THAT(v, AllOf(SizeIs(3), ElementsAre(ValueIs(123), ValueIs(123),
-                                                ValueIs(123))));
+    EXPECT_THAT(v, AllOf(SizeIs(3u), ElementsAre(ValueIs(123), ValueIs(123),
+                                                 ValueIs(123))));
     EXPECT_LE(v.size(), v.capacity());
   }
 }
@@ -1275,16 +1282,17 @@ TEST(RangedConstructor, SimpleType) {
   std::vector<int> source_v = {4, 5, 6};
   // First try to fit in inline backing
   absl::InlinedVector<int, 4> v(source_v.begin(), source_v.end());
-  EXPECT_EQ(3, v.size());
-  EXPECT_EQ(4, v.capacity());  // Indication that we're still on inlined storage
+  EXPECT_EQ(3u, v.size());
+  EXPECT_EQ(4u,
+            v.capacity());  // Indication that we're still on inlined storage
   EXPECT_EQ(4, v[0]);
   EXPECT_EQ(5, v[1]);
   EXPECT_EQ(6, v[2]);
 
   // Now, force a re-allocate
   absl::InlinedVector<int, 2> realloc_v(source_v.begin(), source_v.end());
-  EXPECT_EQ(3, realloc_v.size());
-  EXPECT_LT(2, realloc_v.capacity());
+  EXPECT_EQ(3u, realloc_v.size());
+  EXPECT_LT(2u, realloc_v.capacity());
   EXPECT_EQ(4, realloc_v[0]);
   EXPECT_EQ(5, realloc_v[1]);
   EXPECT_EQ(6, realloc_v[2]);
@@ -1299,8 +1307,8 @@ void InstanceRangedConstructorTestForContainer() {
   tracker.ResetCopiesMovesSwaps();
   absl::InlinedVector<Instance, inlined_capacity> v(source_v.begin(),
                                                     source_v.end());
-  EXPECT_EQ(2, v.size());
-  EXPECT_LT(1, v.capacity());
+  EXPECT_EQ(2u, v.size());
+  EXPECT_LT(1u, v.capacity());
   EXPECT_EQ(0, v[0].value());
   EXPECT_EQ(1, v[1].value());
   EXPECT_EQ(tracker.copies(), 2);
@@ -1359,12 +1367,12 @@ TEST(RangedAssign, SimpleType) {
     // Original contents are [12345, 12345, ...]
     std::vector<int> original_contents(original_size, 12345);
 
-    for (size_t target_size = 0; target_size <= 5; ++target_size) {
+    for (int target_size = 0; target_size <= 5; ++target_size) {
       SCOPED_TRACE(target_size);
 
       // New contents are [3, 4, ...]
       std::vector<int> new_contents;
-      for (size_t i = 0; i < target_size; ++i) {
+      for (int i = 0; i < target_size; ++i) {
         new_contents.push_back(i + 3);
       }
 
@@ -1376,7 +1384,7 @@ TEST(RangedAssign, SimpleType) {
       EXPECT_LE(new_contents.size(), v.capacity());
       if (target_size <= 3 && original_size <= 3) {
         // Storage should stay inline when target size is small.
-        EXPECT_EQ(3, v.capacity());
+        EXPECT_EQ(3u, v.capacity());
       }
       EXPECT_THAT(v, ElementsAreArray(new_contents));
     }
@@ -1409,7 +1417,7 @@ void InstanceRangedAssignTestForContainer() {
       // TODO(bsamwel): Test with an input iterator.
       std::vector<Instance> new_contents_in;
       for (size_t i = 0; i < target_size; ++i) {
-        new_contents_in.push_back(Instance(i + 3));
+        new_contents_in.push_back(Instance(static_cast<int>(i) + 3));
       }
       SourceContainer new_contents(new_contents_in.begin(),
                                    new_contents_in.end());
@@ -1422,7 +1430,7 @@ void InstanceRangedAssignTestForContainer() {
       EXPECT_LE(new_contents.size(), v.capacity());
       if (target_size <= 3 && original_size <= 3) {
         // Storage should stay inline when target size is small.
-        EXPECT_EQ(3, v.capacity());
+        EXPECT_EQ(3u, v.capacity());
       }
       EXPECT_TRUE(std::equal(v.begin(), v.end(), new_contents.begin(),
                              InstanceValuesEqual<Instance>));
@@ -1446,12 +1454,12 @@ TYPED_TEST_P(InstanceTest, RangedAssign) {
 
 TEST(InitializerListConstructor, SimpleTypeWithInlineBacking) {
   EXPECT_THAT((absl::InlinedVector<int, 4>{4, 5, 6}),
-              AllOf(SizeIs(3), CapacityIs(4), ElementsAre(4, 5, 6)));
+              AllOf(SizeIs(3u), CapacityIs(4u), ElementsAre(4, 5, 6)));
 }
 
 TEST(InitializerListConstructor, SimpleTypeWithReallocationRequired) {
   EXPECT_THAT((absl::InlinedVector<int, 2>{4, 5, 6}),
-              AllOf(SizeIs(3), CapacityIs(Gt(2)), ElementsAre(4, 5, 6)));
+              AllOf(SizeIs(3u), CapacityIs(Gt(2u)), ElementsAre(4, 5, 6)));
 }
 
 TEST(InitializerListConstructor, DisparateTypesInList) {
@@ -1464,14 +1472,14 @@ TEST(InitializerListConstructor, DisparateTypesInList) {
 TEST(InitializerListConstructor, ComplexTypeWithInlineBacking) {
   EXPECT_THAT((absl::InlinedVector<CopyableMovableInstance, 1>{
                   CopyableMovableInstance(0)}),
-              AllOf(SizeIs(1), CapacityIs(1), ElementsAre(ValueIs(0))));
+              AllOf(SizeIs(1u), CapacityIs(1u), ElementsAre(ValueIs(0))));
 }
 
 TEST(InitializerListConstructor, ComplexTypeWithReallocationRequired) {
-  EXPECT_THAT(
-      (absl::InlinedVector<CopyableMovableInstance, 1>{
-          CopyableMovableInstance(0), CopyableMovableInstance(1)}),
-      AllOf(SizeIs(2), CapacityIs(Gt(1)), ElementsAre(ValueIs(0), ValueIs(1))));
+  EXPECT_THAT((absl::InlinedVector<CopyableMovableInstance, 1>{
+                  CopyableMovableInstance(0), CopyableMovableInstance(1)}),
+              AllOf(SizeIs(2u), CapacityIs(Gt(1u)),
+                    ElementsAre(ValueIs(0), ValueIs(1))));
 }
 
 TEST(InitializerListAssign, SimpleTypeFitsInlineBacking) {
@@ -1481,14 +1489,14 @@ TEST(InitializerListAssign, SimpleTypeFitsInlineBacking) {
     absl::InlinedVector<int, 2> v1(original_size, 12345);
     const size_t original_capacity_v1 = v1.capacity();
     v1.assign({3});
-    EXPECT_THAT(
-        v1, AllOf(SizeIs(1), CapacityIs(original_capacity_v1), ElementsAre(3)));
+    EXPECT_THAT(v1, AllOf(SizeIs(1u), CapacityIs(original_capacity_v1),
+                          ElementsAre(3)));
 
     absl::InlinedVector<int, 2> v2(original_size, 12345);
     const size_t original_capacity_v2 = v2.capacity();
     v2 = {3};
-    EXPECT_THAT(
-        v2, AllOf(SizeIs(1), CapacityIs(original_capacity_v2), ElementsAre(3)));
+    EXPECT_THAT(v2, AllOf(SizeIs(1u), CapacityIs(original_capacity_v2),
+                          ElementsAre(3)));
   }
 }
 
@@ -1497,13 +1505,13 @@ TEST(InitializerListAssign, SimpleTypeDoesNotFitInlineBacking) {
     SCOPED_TRACE(original_size);
     absl::InlinedVector<int, 2> v1(original_size, 12345);
     v1.assign({3, 4, 5});
-    EXPECT_THAT(v1, AllOf(SizeIs(3), ElementsAre(3, 4, 5)));
-    EXPECT_LE(3, v1.capacity());
+    EXPECT_THAT(v1, AllOf(SizeIs(3u), ElementsAre(3, 4, 5)));
+    EXPECT_LE(3u, v1.capacity());
 
     absl::InlinedVector<int, 2> v2(original_size, 12345);
     v2 = {3, 4, 5};
-    EXPECT_THAT(v2, AllOf(SizeIs(3), ElementsAre(3, 4, 5)));
-    EXPECT_LE(3, v2.capacity());
+    EXPECT_THAT(v2, AllOf(SizeIs(3u), ElementsAre(3, 4, 5)));
+    EXPECT_LE(3u, v2.capacity());
   }
 }
 
@@ -1532,7 +1540,7 @@ TYPED_TEST_P(InstanceTest, InitializerListAssign) {
     absl::InlinedVector<Instance, 2> v(original_size, Instance(12345));
     const size_t original_capacity = v.capacity();
     v.assign({Instance(3)});
-    EXPECT_THAT(v, AllOf(SizeIs(1), CapacityIs(original_capacity),
+    EXPECT_THAT(v, AllOf(SizeIs(1u), CapacityIs(original_capacity),
                          ElementsAre(ValueIs(3))));
   }
   for (size_t original_size = 0; original_size <= 4; ++original_size) {
@@ -1540,22 +1548,23 @@ TYPED_TEST_P(InstanceTest, InitializerListAssign) {
     absl::InlinedVector<Instance, 2> v(original_size, Instance(12345));
     v.assign({Instance(3), Instance(4), Instance(5)});
     EXPECT_THAT(
-        v, AllOf(SizeIs(3), ElementsAre(ValueIs(3), ValueIs(4), ValueIs(5))));
-    EXPECT_LE(3, v.capacity());
+        v, AllOf(SizeIs(3u), ElementsAre(ValueIs(3), ValueIs(4), ValueIs(5))));
+    EXPECT_LE(3u, v.capacity());
   }
 }
 
-REGISTER_TYPED_TEST_CASE_P(InstanceTest, Swap, CountConstructorsDestructors,
-                           CountConstructorsDestructorsOnCopyConstruction,
-                           CountConstructorsDestructorsOnMoveConstruction,
-                           CountConstructorsDestructorsOnAssignment,
-                           CountConstructorsDestructorsOnMoveAssignment,
-                           CountElemAssignInlineBacking, RangedConstructor,
-                           RangedAssign, InitializerListAssign);
+REGISTER_TYPED_TEST_SUITE_P(InstanceTest, Swap, CountConstructorsDestructors,
+                            CountConstructorsDestructorsOnCopyConstruction,
+                            CountConstructorsDestructorsOnMoveConstruction,
+                            CountConstructorsDestructorsOnAssignment,
+                            CountConstructorsDestructorsOnMoveAssignment,
+                            CountElemAssignInlineBacking, RangedConstructor,
+                            RangedAssign, InitializerListAssign);
 
 using InstanceTypes =
     ::testing::Types<CopyableOnlyInstance, CopyableMovableInstance>;
-INSTANTIATE_TYPED_TEST_CASE_P(InstanceTestOnTypes, InstanceTest, InstanceTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(InstanceTestOnTypes, InstanceTest,
+                               InstanceTypes);
 
 TEST(DynamicVec, DynamicVecCompiles) {
   DynamicVec v;
@@ -1586,54 +1595,54 @@ TEST(AllocatorSupportTest, CountAllocations) {
   MyAlloc alloc(&allocated);
   {
     AllocVec ABSL_ATTRIBUTE_UNUSED v(ia, ia + 4, alloc);
-    EXPECT_THAT(allocated, 0);
+    EXPECT_THAT(allocated, Eq(0));
   }
-  EXPECT_THAT(allocated, 0);
+  EXPECT_THAT(allocated, Eq(0));
   {
     AllocVec ABSL_ATTRIBUTE_UNUSED v(ia, ia + ABSL_ARRAYSIZE(ia), alloc);
-    EXPECT_THAT(allocated, v.size() * sizeof(int));
+    EXPECT_THAT(allocated, Eq(static_cast<int64_t>(v.size() * sizeof(int))));
   }
-  EXPECT_THAT(allocated, 0);
+  EXPECT_THAT(allocated, Eq(0));
   {
     AllocVec v(4, 1, alloc);
-    EXPECT_THAT(allocated, 0);
+    EXPECT_THAT(allocated, Eq(0));
 
     int64_t allocated2 = 0;
     MyAlloc alloc2(&allocated2);
     AllocVec v2(v, alloc2);
-    EXPECT_THAT(allocated2, 0);
+    EXPECT_THAT(allocated2, Eq(0));
 
     int64_t allocated3 = 0;
     MyAlloc alloc3(&allocated3);
     AllocVec v3(std::move(v), alloc3);
-    EXPECT_THAT(allocated3, 0);
+    EXPECT_THAT(allocated3, Eq(0));
   }
   EXPECT_THAT(allocated, 0);
   {
     AllocVec v(8, 2, alloc);
-    EXPECT_THAT(allocated, v.size() * sizeof(int));
+    EXPECT_THAT(allocated, Eq(static_cast<int64_t>(v.size() * sizeof(int))));
 
     int64_t allocated2 = 0;
     MyAlloc alloc2(&allocated2);
     AllocVec v2(v, alloc2);
-    EXPECT_THAT(allocated2, v2.size() * sizeof(int));
+    EXPECT_THAT(allocated2, Eq(static_cast<int64_t>(v2.size() * sizeof(int))));
 
     int64_t allocated3 = 0;
     MyAlloc alloc3(&allocated3);
     AllocVec v3(std::move(v), alloc3);
-    EXPECT_THAT(allocated3, v3.size() * sizeof(int));
+    EXPECT_THAT(allocated3, Eq(static_cast<int64_t>(v3.size() * sizeof(int))));
   }
   EXPECT_EQ(allocated, 0);
   {
     // Test shrink_to_fit deallocations.
     AllocVec v(8, 2, alloc);
-    EXPECT_EQ(allocated, 8 * sizeof(int));
+    EXPECT_EQ(allocated, static_cast<int64_t>(8 * sizeof(int)));
     v.resize(5);
-    EXPECT_EQ(allocated, 8 * sizeof(int));
+    EXPECT_EQ(allocated, static_cast<int64_t>(8 * sizeof(int)));
     v.shrink_to_fit();
-    EXPECT_EQ(allocated, 5 * sizeof(int));
+    EXPECT_EQ(allocated, static_cast<int64_t>(5 * sizeof(int)));
     v.resize(4);
-    EXPECT_EQ(allocated, 5 * sizeof(int));
+    EXPECT_EQ(allocated, static_cast<int64_t>(5 * sizeof(int)));
     v.shrink_to_fit();
     EXPECT_EQ(allocated, 0);
   }
@@ -1652,13 +1661,17 @@ TEST(AllocatorSupportTest, SwapBothAllocated) {
     AllocVec v1(ia1, ia1 + ABSL_ARRAYSIZE(ia1), a1);
     AllocVec v2(ia2, ia2 + ABSL_ARRAYSIZE(ia2), a2);
     EXPECT_LT(v1.capacity(), v2.capacity());
-    EXPECT_THAT(allocated1, v1.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, v2.capacity() * sizeof(int));
+    EXPECT_THAT(allocated1,
+                Eq(static_cast<int64_t>(v1.capacity() * sizeof(int))));
+    EXPECT_THAT(allocated2,
+                Eq(static_cast<int64_t>(v2.capacity() * sizeof(int))));
     v1.swap(v2);
     EXPECT_THAT(v1, ElementsAreArray(ia2));
     EXPECT_THAT(v2, ElementsAreArray(ia1));
-    EXPECT_THAT(allocated1, v2.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, v1.capacity() * sizeof(int));
+    EXPECT_THAT(allocated1,
+                Eq(static_cast<int64_t>(v2.capacity() * sizeof(int))));
+    EXPECT_THAT(allocated2,
+                Eq(static_cast<int64_t>(v1.capacity() * sizeof(int))));
   }
   EXPECT_THAT(allocated1, 0);
   EXPECT_THAT(allocated2, 0);
@@ -1676,13 +1689,15 @@ TEST(AllocatorSupportTest, SwapOneAllocated) {
     MyAlloc a2(&allocated2);
     AllocVec v1(ia1, ia1 + ABSL_ARRAYSIZE(ia1), a1);
     AllocVec v2(ia2, ia2 + ABSL_ARRAYSIZE(ia2), a2);
-    EXPECT_THAT(allocated1, v1.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, 0);
+    EXPECT_THAT(allocated1,
+                Eq(static_cast<int64_t>(v1.capacity() * sizeof(int))));
+    EXPECT_THAT(allocated2, Eq(0));
     v1.swap(v2);
     EXPECT_THAT(v1, ElementsAreArray(ia2));
     EXPECT_THAT(v2, ElementsAreArray(ia1));
-    EXPECT_THAT(allocated1, v2.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, 0);
+    EXPECT_THAT(allocated1,
+                Eq(static_cast<int64_t>(v2.capacity() * sizeof(int))));
+    EXPECT_THAT(allocated2, Eq(0));
     EXPECT_TRUE(v2.get_allocator() == a1);
     EXPECT_TRUE(v1.get_allocator() == a2);
   }
@@ -1744,7 +1759,7 @@ TEST(AllocatorSupportTest, ScopedAllocatorWorksAllocated) {
 }
 
 TEST(AllocatorSupportTest, SizeAllocConstructor) {
-  constexpr int inlined_size = 4;
+  constexpr size_t inlined_size = 4;
   using Alloc = CountingAllocator<int>;
   using AllocVec = absl::InlinedVector<int, inlined_size, Alloc>;
 
@@ -1754,7 +1769,7 @@ TEST(AllocatorSupportTest, SizeAllocConstructor) {
     auto v = AllocVec(len, Alloc(&allocated));
 
     // Inline storage used; allocator should not be invoked
-    EXPECT_THAT(allocated, 0);
+    EXPECT_THAT(allocated, Eq(0));
     EXPECT_THAT(v, AllOf(SizeIs(len), Each(0)));
   }
 
@@ -1764,7 +1779,7 @@ TEST(AllocatorSupportTest, SizeAllocConstructor) {
     auto v = AllocVec(len, Alloc(&allocated));
 
     // Out of line storage used; allocation of 8 elements expected
-    EXPECT_THAT(allocated, len * sizeof(int));
+    EXPECT_THAT(allocated, Eq(static_cast<int64_t>(len * sizeof(int))));
     EXPECT_THAT(v, AllOf(SizeIs(len), Each(0)));
   }
 }
@@ -1799,9 +1814,9 @@ TEST(InlinedVectorTest, AbslHashValueWorks) {
 
   // Generate a variety of vectors some of these are small enough for the inline
   // space but are stored out of line.
-  for (int i = 0; i < 10; ++i) {
+  for (size_t i = 0; i < 10; ++i) {
     V v;
-    for (int j = 0; j < i; ++j) {
+    for (int j = 0; j < static_cast<int>(i); ++j) {
       v.push_back(j);
     }
     cases.push_back(v);
@@ -1812,4 +1827,199 @@ TEST(InlinedVectorTest, AbslHashValueWorks) {
   EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(cases));
 }
 
+class MoveConstructibleOnlyInstance
+    : public absl::test_internal::BaseCountedInstance {
+ public:
+  explicit MoveConstructibleOnlyInstance(int x) : BaseCountedInstance(x) {}
+  MoveConstructibleOnlyInstance(MoveConstructibleOnlyInstance&& other) =
+      default;
+  MoveConstructibleOnlyInstance& operator=(
+      MoveConstructibleOnlyInstance&& other) = delete;
+};
+
+MATCHER(HasValue, "") {
+  return ::testing::get<0>(arg).value() == ::testing::get<1>(arg);
+}
+
+TEST(NonAssignableMoveAssignmentTest, AllocatedToInline) {
+  using X = MoveConstructibleOnlyInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> inlined;
+  inlined.emplace_back(1);
+  absl::InlinedVector<X, 2> allocated;
+  allocated.emplace_back(1);
+  allocated.emplace_back(2);
+  allocated.emplace_back(3);
+  tracker.ResetCopiesMovesSwaps();
+
+  inlined = std::move(allocated);
+  // passed ownership of the allocated storage
+  EXPECT_EQ(tracker.moves(), 0);
+  EXPECT_EQ(tracker.live_instances(), 3);
+
+  EXPECT_THAT(inlined, Pointwise(HasValue(), {1, 2, 3}));
+}
+
+TEST(NonAssignableMoveAssignmentTest, InlineToAllocated) {
+  using X = MoveConstructibleOnlyInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> inlined;
+  inlined.emplace_back(1);
+  absl::InlinedVector<X, 2> allocated;
+  allocated.emplace_back(1);
+  allocated.emplace_back(2);
+  allocated.emplace_back(3);
+  tracker.ResetCopiesMovesSwaps();
+
+  allocated = std::move(inlined);
+  // Moved elements
+  EXPECT_EQ(tracker.moves(), 1);
+  EXPECT_EQ(tracker.live_instances(), 1);
+
+  EXPECT_THAT(allocated, Pointwise(HasValue(), {1}));
+}
+
+TEST(NonAssignableMoveAssignmentTest, InlineToInline) {
+  using X = MoveConstructibleOnlyInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> inlined_a;
+  inlined_a.emplace_back(1);
+  absl::InlinedVector<X, 2> inlined_b;
+  inlined_b.emplace_back(1);
+  tracker.ResetCopiesMovesSwaps();
+
+  inlined_a = std::move(inlined_b);
+  // Moved elements
+  EXPECT_EQ(tracker.moves(), 1);
+  EXPECT_EQ(tracker.live_instances(), 1);
+
+  EXPECT_THAT(inlined_a, Pointwise(HasValue(), {1}));
+}
+
+TEST(NonAssignableMoveAssignmentTest, AllocatedToAllocated) {
+  using X = MoveConstructibleOnlyInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> allocated_a;
+  allocated_a.emplace_back(1);
+  allocated_a.emplace_back(2);
+  allocated_a.emplace_back(3);
+  absl::InlinedVector<X, 2> allocated_b;
+  allocated_b.emplace_back(4);
+  allocated_b.emplace_back(5);
+  allocated_b.emplace_back(6);
+  allocated_b.emplace_back(7);
+  tracker.ResetCopiesMovesSwaps();
+
+  allocated_a = std::move(allocated_b);
+  // passed ownership of the allocated storage
+  EXPECT_EQ(tracker.moves(), 0);
+  EXPECT_EQ(tracker.live_instances(), 4);
+
+  EXPECT_THAT(allocated_a, Pointwise(HasValue(), {4, 5, 6, 7}));
+}
+
+TEST(NonAssignableMoveAssignmentTest, AssignThis) {
+  using X = MoveConstructibleOnlyInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> v;
+  v.emplace_back(1);
+  v.emplace_back(2);
+  v.emplace_back(3);
+
+  tracker.ResetCopiesMovesSwaps();
+
+  // Obfuscated in order to pass -Wself-move.
+  v = std::move(*std::addressof(v));
+  // nothing happens
+  EXPECT_EQ(tracker.moves(), 0);
+  EXPECT_EQ(tracker.live_instances(), 3);
+
+  EXPECT_THAT(v, Pointwise(HasValue(), {1, 2, 3}));
+}
+
+class NonSwappableInstance : public absl::test_internal::BaseCountedInstance {
+ public:
+  explicit NonSwappableInstance(int x) : BaseCountedInstance(x) {}
+  NonSwappableInstance(const NonSwappableInstance& other) = default;
+  NonSwappableInstance& operator=(const NonSwappableInstance& other) = default;
+  NonSwappableInstance(NonSwappableInstance&& other) = default;
+  NonSwappableInstance& operator=(NonSwappableInstance&& other) = default;
+};
+
+void swap(NonSwappableInstance&, NonSwappableInstance&) = delete;
+
+TEST(NonSwappableSwapTest, InlineAndAllocatedTransferStorageAndMove) {
+  using X = NonSwappableInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> inlined;
+  inlined.emplace_back(1);
+  absl::InlinedVector<X, 2> allocated;
+  allocated.emplace_back(1);
+  allocated.emplace_back(2);
+  allocated.emplace_back(3);
+  tracker.ResetCopiesMovesSwaps();
+
+  inlined.swap(allocated);
+  EXPECT_EQ(tracker.moves(), 1);
+  EXPECT_EQ(tracker.live_instances(), 4);
+
+  EXPECT_THAT(inlined, Pointwise(HasValue(), {1, 2, 3}));
+}
+
+TEST(NonSwappableSwapTest, InlineAndInlineMoveIndividualElements) {
+  using X = NonSwappableInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> inlined_a;
+  inlined_a.emplace_back(1);
+  absl::InlinedVector<X, 2> inlined_b;
+  inlined_b.emplace_back(2);
+  tracker.ResetCopiesMovesSwaps();
+
+  inlined_a.swap(inlined_b);
+  EXPECT_EQ(tracker.moves(), 3);
+  EXPECT_EQ(tracker.live_instances(), 2);
+
+  EXPECT_THAT(inlined_a, Pointwise(HasValue(), {2}));
+  EXPECT_THAT(inlined_b, Pointwise(HasValue(), {1}));
+}
+
+TEST(NonSwappableSwapTest, AllocatedAndAllocatedOnlyTransferStorage) {
+  using X = NonSwappableInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> allocated_a;
+  allocated_a.emplace_back(1);
+  allocated_a.emplace_back(2);
+  allocated_a.emplace_back(3);
+  absl::InlinedVector<X, 2> allocated_b;
+  allocated_b.emplace_back(4);
+  allocated_b.emplace_back(5);
+  allocated_b.emplace_back(6);
+  allocated_b.emplace_back(7);
+  tracker.ResetCopiesMovesSwaps();
+
+  allocated_a.swap(allocated_b);
+  EXPECT_EQ(tracker.moves(), 0);
+  EXPECT_EQ(tracker.live_instances(), 7);
+
+  EXPECT_THAT(allocated_a, Pointwise(HasValue(), {4, 5, 6, 7}));
+  EXPECT_THAT(allocated_b, Pointwise(HasValue(), {1, 2, 3}));
+}
+
+TEST(NonSwappableSwapTest, SwapThis) {
+  using X = NonSwappableInstance;
+  InstanceTracker tracker;
+  absl::InlinedVector<X, 2> v;
+  v.emplace_back(1);
+  v.emplace_back(2);
+  v.emplace_back(3);
+
+  tracker.ResetCopiesMovesSwaps();
+
+  v.swap(v);
+  EXPECT_EQ(tracker.moves(), 0);
+  EXPECT_EQ(tracker.live_instances(), 3);
+
+  EXPECT_THAT(v, Pointwise(HasValue(), {1, 2, 3}));
+}
+
 }  // anonymous namespace
diff --git a/third_party/abseil-cpp/absl/container/internal/btree.h b/third_party/abseil-cpp/absl/container/internal/btree.h
index f636c5fc73..2e21dc66ea 100644
--- a/third_party/abseil-cpp/absl/container/internal/btree.h
+++ b/third_party/abseil-cpp/absl/container/internal/btree.h
@@ -58,8 +58,10 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/base/internal/raw_logging.h"
 #include "absl/base/macros.h"
 #include "absl/container/internal/common.h"
+#include "absl/container/internal/common_policy_traits.h"
 #include "absl/container/internal/compressed_tuple.h"
 #include "absl/container/internal/container_memory.h"
 #include "absl/container/internal/layout.h"
@@ -74,12 +76,24 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace container_internal {
 
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+#error ABSL_BTREE_ENABLE_GENERATIONS cannot be directly set
+#elif defined(ABSL_HAVE_ADDRESS_SANITIZER) || \
+    defined(ABSL_HAVE_MEMORY_SANITIZER)
+// When compiled in sanitizer mode, we add generation integers to the nodes and
+// iterators. When iterators are used, we validate that the container has not
+// been mutated since the iterator was constructed.
+#define ABSL_BTREE_ENABLE_GENERATIONS
+#endif
+
+template <typename Compare, typename T, typename U>
+using compare_result_t = absl::result_of_t<const Compare(const T &, const U &)>;
+
 // A helper class that indicates if the Compare parameter is a key-compare-to
 // comparator.
 template <typename Compare, typename T>
 using btree_is_key_compare_to =
-    std::is_convertible<absl::result_of_t<Compare(const T &, const T &)>,
-                        absl::weak_ordering>;
+    std::is_convertible<compare_result_t<Compare, T, T>, absl::weak_ordering>;
 
 struct StringBtreeDefaultLess {
   using is_transparent = void;
@@ -87,7 +101,7 @@ struct StringBtreeDefaultLess {
   StringBtreeDefaultLess() = default;
 
   // Compatibility constructor.
-  StringBtreeDefaultLess(std::less<std::string>) {}  // NOLINT
+  StringBtreeDefaultLess(std::less<std::string>) {}        // NOLINT
   StringBtreeDefaultLess(std::less<absl::string_view>) {}  // NOLINT
 
   // Allow converting to std::less for use in key_comp()/value_comp().
@@ -119,7 +133,7 @@ struct StringBtreeDefaultGreater {
 
   StringBtreeDefaultGreater() = default;
 
-  StringBtreeDefaultGreater(std::greater<std::string>) {}  // NOLINT
+  StringBtreeDefaultGreater(std::greater<std::string>) {}        // NOLINT
   StringBtreeDefaultGreater(std::greater<absl::string_view>) {}  // NOLINT
 
   // Allow converting to std::greater for use in key_comp()/value_comp().
@@ -146,49 +160,140 @@ struct StringBtreeDefaultGreater {
   }
 };
 
-// A helper class to convert a boolean comparison into a three-way "compare-to"
-// comparison that returns an `absl::weak_ordering`. This helper
-// class is specialized for less<std::string>, greater<std::string>,
-// less<string_view>, greater<string_view>, less<absl::Cord>, and
-// greater<absl::Cord>.
-//
-// key_compare_to_adapter is provided so that btree users
-// automatically get the more efficient compare-to code when using common
-// Abseil string types with common comparison functors.
-// These string-like specializations also turn on heterogeneous lookup by
-// default.
+// See below comments for checked_compare.
+template <typename Compare, bool is_class = std::is_class<Compare>::value>
+struct checked_compare_base : Compare {
+  using Compare::Compare;
+  explicit checked_compare_base(Compare c) : Compare(std::move(c)) {}
+  const Compare &comp() const { return *this; }
+};
 template <typename Compare>
-struct key_compare_to_adapter {
-  using type = Compare;
+struct checked_compare_base<Compare, false> {
+  explicit checked_compare_base(Compare c) : compare(std::move(c)) {}
+  const Compare &comp() const { return compare; }
+  Compare compare;
+};
+
+// A mechanism for opting out of checked_compare for use only in btree_test.cc.
+struct BtreeTestOnlyCheckedCompareOptOutBase {};
+
+// A helper class to adapt the specified comparator for two use cases:
+// (1) When using common Abseil string types with common comparison functors,
+// convert a boolean comparison into a three-way comparison that returns an
+// `absl::weak_ordering`. This helper class is specialized for
+// less<std::string>, greater<std::string>, less<string_view>,
+// greater<string_view>, less<absl::Cord>, and greater<absl::Cord>.
+// (2) Adapt the comparator to diagnose cases of non-strict-weak-ordering (see
+// https://en.cppreference.com/w/cpp/named_req/Compare) in debug mode. Whenever
+// a comparison is made, we will make assertions to verify that the comparator
+// is valid.
+template <typename Compare, typename Key>
+struct key_compare_adapter {
+  // Inherit from checked_compare_base to support function pointers and also
+  // keep empty-base-optimization (EBO) support for classes.
+  // Note: we can't use CompressedTuple here because that would interfere
+  // with the EBO for `btree::rightmost_`. `btree::rightmost_` is itself a
+  // CompressedTuple and nested `CompressedTuple`s don't support EBO.
+  // TODO(b/214288561): use CompressedTuple instead once it supports EBO for
+  // nested `CompressedTuple`s.
+  struct checked_compare : checked_compare_base<Compare> {
+   private:
+    using Base = typename checked_compare::checked_compare_base;
+    using Base::comp;
+
+    // If possible, returns whether `t` is equivalent to itself. We can only do
+    // this for `Key`s because we can't be sure that it's safe to call
+    // `comp()(k, k)` otherwise. Even if SFINAE allows it, there could be a
+    // compilation failure inside the implementation of the comparison operator.
+    bool is_self_equivalent(const Key &k) const {
+      // Note: this works for both boolean and three-way comparators.
+      return comp()(k, k) == 0;
+    }
+    // If we can't compare `t` with itself, returns true unconditionally.
+    template <typename T>
+    bool is_self_equivalent(const T &) const {
+      return true;
+    }
+
+   public:
+    using Base::Base;
+    checked_compare(Compare comp) : Base(std::move(comp)) {}  // NOLINT
+
+    // Allow converting to Compare for use in key_comp()/value_comp().
+    explicit operator Compare() const { return comp(); }
+
+    template <typename T, typename U,
+              absl::enable_if_t<
+                  std::is_same<bool, compare_result_t<Compare, T, U>>::value,
+                  int> = 0>
+    bool operator()(const T &lhs, const U &rhs) const {
+      // NOTE: if any of these assertions fail, then the comparator does not
+      // establish a strict-weak-ordering (see
+      // https://en.cppreference.com/w/cpp/named_req/Compare).
+      assert(is_self_equivalent(lhs));
+      assert(is_self_equivalent(rhs));
+      const bool lhs_comp_rhs = comp()(lhs, rhs);
+      assert(!lhs_comp_rhs || !comp()(rhs, lhs));
+      return lhs_comp_rhs;
+    }
+
+    template <
+        typename T, typename U,
+        absl::enable_if_t<std::is_convertible<compare_result_t<Compare, T, U>,
+                                              absl::weak_ordering>::value,
+                          int> = 0>
+    absl::weak_ordering operator()(const T &lhs, const U &rhs) const {
+      // NOTE: if any of these assertions fail, then the comparator does not
+      // establish a strict-weak-ordering (see
+      // https://en.cppreference.com/w/cpp/named_req/Compare).
+      assert(is_self_equivalent(lhs));
+      assert(is_self_equivalent(rhs));
+      const absl::weak_ordering lhs_comp_rhs = comp()(lhs, rhs);
+#ifndef NDEBUG
+      const absl::weak_ordering rhs_comp_lhs = comp()(rhs, lhs);
+      if (lhs_comp_rhs > 0) {
+        assert(rhs_comp_lhs < 0 && "lhs_comp_rhs > 0 -> rhs_comp_lhs < 0");
+      } else if (lhs_comp_rhs == 0) {
+        assert(rhs_comp_lhs == 0 && "lhs_comp_rhs == 0 -> rhs_comp_lhs == 0");
+      } else {
+        assert(rhs_comp_lhs > 0 && "lhs_comp_rhs < 0 -> rhs_comp_lhs > 0");
+      }
+#endif
+      return lhs_comp_rhs;
+    }
+  };
+  using type = absl::conditional_t<
+      std::is_base_of<BtreeTestOnlyCheckedCompareOptOutBase, Compare>::value,
+      Compare, checked_compare>;
 };
 
 template <>
-struct key_compare_to_adapter<std::less<std::string>> {
+struct key_compare_adapter<std::less<std::string>, std::string> {
   using type = StringBtreeDefaultLess;
 };
 
 template <>
-struct key_compare_to_adapter<std::greater<std::string>> {
+struct key_compare_adapter<std::greater<std::string>, std::string> {
   using type = StringBtreeDefaultGreater;
 };
 
 template <>
-struct key_compare_to_adapter<std::less<absl::string_view>> {
+struct key_compare_adapter<std::less<absl::string_view>, absl::string_view> {
   using type = StringBtreeDefaultLess;
 };
 
 template <>
-struct key_compare_to_adapter<std::greater<absl::string_view>> {
+struct key_compare_adapter<std::greater<absl::string_view>, absl::string_view> {
   using type = StringBtreeDefaultGreater;
 };
 
 template <>
-struct key_compare_to_adapter<std::less<absl::Cord>> {
+struct key_compare_adapter<std::less<absl::Cord>, absl::Cord> {
   using type = StringBtreeDefaultLess;
 };
 
 template <>
-struct key_compare_to_adapter<std::greater<absl::Cord>> {
+struct key_compare_adapter<std::greater<absl::Cord>, absl::Cord> {
   using type = StringBtreeDefaultGreater;
 };
 
@@ -224,21 +329,69 @@ struct prefers_linear_node_search<
     T, absl::void_t<typename T::absl_btree_prefer_linear_node_search>>
     : T::absl_btree_prefer_linear_node_search {};
 
+template <typename Compare, typename Key>
+constexpr bool compare_has_valid_result_type() {
+  using compare_result_type = compare_result_t<Compare, Key, Key>;
+  return std::is_same<compare_result_type, bool>::value ||
+         std::is_convertible<compare_result_type, absl::weak_ordering>::value;
+}
+
+template <typename original_key_compare, typename value_type>
+class map_value_compare {
+  template <typename Params>
+  friend class btree;
+
+  // Note: this `protected` is part of the API of std::map::value_compare. See
+  // https://en.cppreference.com/w/cpp/container/map/value_compare.
+ protected:
+  explicit map_value_compare(original_key_compare c) : comp(std::move(c)) {}
+
+  original_key_compare comp;  // NOLINT
+
+ public:
+  auto operator()(const value_type &lhs, const value_type &rhs) const
+      -> decltype(comp(lhs.first, rhs.first)) {
+    return comp(lhs.first, rhs.first);
+  }
+};
+
 template <typename Key, typename Compare, typename Alloc, int TargetNodeSize,
-          bool Multi, typename SlotPolicy>
-struct common_params {
+          bool IsMulti, bool IsMap, typename SlotPolicy>
+struct common_params : common_policy_traits<SlotPolicy> {
   using original_key_compare = Compare;
 
   // If Compare is a common comparator for a string-like type, then we adapt it
   // to use heterogeneous lookup and to be a key-compare-to comparator.
-  using key_compare = typename key_compare_to_adapter<Compare>::type;
+  // We also adapt the comparator to diagnose invalid comparators in debug mode.
+  // We disable this when `Compare` is invalid in a way that will cause
+  // adaptation to fail (having invalid return type) so that we can give a
+  // better compilation failure in static_assert_validation. If we don't do
+  // this, then there will be cascading compilation failures that are confusing
+  // for users.
+  using key_compare =
+      absl::conditional_t<!compare_has_valid_result_type<Compare, Key>(),
+                          Compare,
+                          typename key_compare_adapter<Compare, Key>::type>;
+
+  static constexpr bool kIsKeyCompareStringAdapted =
+      std::is_same<key_compare, StringBtreeDefaultLess>::value ||
+      std::is_same<key_compare, StringBtreeDefaultGreater>::value;
+  static constexpr bool kIsKeyCompareTransparent =
+      IsTransparent<original_key_compare>::value || kIsKeyCompareStringAdapted;
+  static constexpr bool kEnableGenerations =
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+      true;
+#else
+      false;
+#endif
+
   // A type which indicates if we have a key-compare-to functor or a plain old
   // key-compare functor.
   using is_key_compare_to = btree_is_key_compare_to<key_compare, Key>;
 
   using allocator_type = Alloc;
   using key_type = Key;
-  using size_type = std::make_signed<size_t>::type;
+  using size_type = size_t;
   using difference_type = ptrdiff_t;
 
   using slot_policy = SlotPolicy;
@@ -250,6 +403,12 @@ struct common_params {
   using reference = value_type &;
   using const_reference = const value_type &;
 
+  using value_compare =
+      absl::conditional_t<IsMap,
+                          map_value_compare<original_key_compare, value_type>,
+                          original_key_compare>;
+  using is_map_container = std::integral_constant<bool, IsMap>;
+
   // For the given lookup key type, returns whether we can have multiple
   // equivalent keys in the btree. If this is a multi-container, then we can.
   // Otherwise, we can have multiple equivalent keys only if all of the
@@ -260,163 +419,26 @@ struct common_params {
   //   that we know has the same equivalence classes for all lookup types.
   template <typename LookupKey>
   constexpr static bool can_have_multiple_equivalent_keys() {
-    return Multi ||
-           (IsTransparent<key_compare>::value &&
-            !std::is_same<LookupKey, Key>::value &&
-            !std::is_same<key_compare, StringBtreeDefaultLess>::value &&
-            !std::is_same<key_compare, StringBtreeDefaultGreater>::value);
+    return IsMulti || (IsTransparent<key_compare>::value &&
+                       !std::is_same<LookupKey, Key>::value &&
+                       !kIsKeyCompareStringAdapted);
   }
 
   enum {
     kTargetNodeSize = TargetNodeSize,
 
-    // Upper bound for the available space for values. This is largest for leaf
+    // Upper bound for the available space for slots. This is largest for leaf
     // nodes, which have overhead of at least a pointer + 4 bytes (for storing
     // 3 field_types and an enum).
-    kNodeValueSpace =
-        TargetNodeSize - /*minimum overhead=*/(sizeof(void *) + 4),
+    kNodeSlotSpace = TargetNodeSize - /*minimum overhead=*/(sizeof(void *) + 4),
   };
 
-  // This is an integral type large enough to hold as many
-  // ValueSize-values as will fit a node of TargetNodeSize bytes.
+  // This is an integral type large enough to hold as many slots as will fit a
+  // node of TargetNodeSize bytes.
   using node_count_type =
-      absl::conditional_t<(kNodeValueSpace / sizeof(value_type) >
+      absl::conditional_t<(kNodeSlotSpace / sizeof(slot_type) >
                            (std::numeric_limits<uint8_t>::max)()),
                           uint16_t, uint8_t>;  // NOLINT
-
-  // The following methods are necessary for passing this struct as PolicyTraits
-  // for node_handle and/or are used within btree.
-  static value_type &element(slot_type *slot) {
-    return slot_policy::element(slot);
-  }
-  static const value_type &element(const slot_type *slot) {
-    return slot_policy::element(slot);
-  }
-  template <class... Args>
-  static void construct(Alloc *alloc, slot_type *slot, Args &&... args) {
-    slot_policy::construct(alloc, slot, std::forward<Args>(args)...);
-  }
-  static void construct(Alloc *alloc, slot_type *slot, slot_type *other) {
-    slot_policy::construct(alloc, slot, other);
-  }
-  static void destroy(Alloc *alloc, slot_type *slot) {
-    slot_policy::destroy(alloc, slot);
-  }
-  static void transfer(Alloc *alloc, slot_type *new_slot, slot_type *old_slot) {
-    construct(alloc, new_slot, old_slot);
-    destroy(alloc, old_slot);
-  }
-  static void swap(Alloc *alloc, slot_type *a, slot_type *b) {
-    slot_policy::swap(alloc, a, b);
-  }
-  static void move(Alloc *alloc, slot_type *src, slot_type *dest) {
-    slot_policy::move(alloc, src, dest);
-  }
-};
-
-// A parameters structure for holding the type parameters for a btree_map.
-// Compare and Alloc should be nothrow copy-constructible.
-template <typename Key, typename Data, typename Compare, typename Alloc,
-          int TargetNodeSize, bool Multi>
-struct map_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
-                                  map_slot_policy<Key, Data>> {
-  using super_type = typename map_params::common_params;
-  using mapped_type = Data;
-  // This type allows us to move keys when it is safe to do so. It is safe
-  // for maps in which value_type and mutable_value_type are layout compatible.
-  using slot_policy = typename super_type::slot_policy;
-  using slot_type = typename super_type::slot_type;
-  using value_type = typename super_type::value_type;
-  using init_type = typename super_type::init_type;
-
-  using original_key_compare = typename super_type::original_key_compare;
-  // Reference: https://en.cppreference.com/w/cpp/container/map/value_compare
-  class value_compare {
-    template <typename Params>
-    friend class btree;
-
-   protected:
-    explicit value_compare(original_key_compare c) : comp(std::move(c)) {}
-
-    original_key_compare comp;  // NOLINT
-
-   public:
-    auto operator()(const value_type &lhs, const value_type &rhs) const
-        -> decltype(comp(lhs.first, rhs.first)) {
-      return comp(lhs.first, rhs.first);
-    }
-  };
-  using is_map_container = std::true_type;
-
-  template <typename V>
-  static auto key(const V &value) -> decltype(value.first) {
-    return value.first;
-  }
-  static const Key &key(const slot_type *s) { return slot_policy::key(s); }
-  static const Key &key(slot_type *s) { return slot_policy::key(s); }
-  // For use in node handle.
-  static auto mutable_key(slot_type *s)
-      -> decltype(slot_policy::mutable_key(s)) {
-    return slot_policy::mutable_key(s);
-  }
-  static mapped_type &value(value_type *value) { return value->second; }
-};
-
-// This type implements the necessary functions from the
-// absl::container_internal::slot_type interface.
-template <typename Key>
-struct set_slot_policy {
-  using slot_type = Key;
-  using value_type = Key;
-  using mutable_value_type = Key;
-
-  static value_type &element(slot_type *slot) { return *slot; }
-  static const value_type &element(const slot_type *slot) { return *slot; }
-
-  template <typename Alloc, class... Args>
-  static void construct(Alloc *alloc, slot_type *slot, Args &&... args) {
-    absl::allocator_traits<Alloc>::construct(*alloc, slot,
-                                             std::forward<Args>(args)...);
-  }
-
-  template <typename Alloc>
-  static void construct(Alloc *alloc, slot_type *slot, slot_type *other) {
-    absl::allocator_traits<Alloc>::construct(*alloc, slot, std::move(*other));
-  }
-
-  template <typename Alloc>
-  static void destroy(Alloc *alloc, slot_type *slot) {
-    absl::allocator_traits<Alloc>::destroy(*alloc, slot);
-  }
-
-  template <typename Alloc>
-  static void swap(Alloc * /*alloc*/, slot_type *a, slot_type *b) {
-    using std::swap;
-    swap(*a, *b);
-  }
-
-  template <typename Alloc>
-  static void move(Alloc * /*alloc*/, slot_type *src, slot_type *dest) {
-    *dest = std::move(*src);
-  }
-};
-
-// A parameters structure for holding the type parameters for a btree_set.
-// Compare and Alloc should be nothrow copy-constructible.
-template <typename Key, typename Compare, typename Alloc, int TargetNodeSize,
-          bool Multi>
-struct set_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
-                                  set_slot_policy<Key>> {
-  using value_type = Key;
-  using slot_type = typename set_params::common_params::slot_type;
-  using value_compare =
-      typename set_params::common_params::original_key_compare;
-  using is_map_container = std::false_type;
-
-  template <typename V>
-  static const V &key(const V &value) { return value; }
-  static const Key &key(const slot_type *slot) { return *slot; }
-  static const Key &key(slot_type *slot) { return *slot; }
 };
 
 // An adapter class that converts a lower-bound compare into an upper-bound
@@ -453,8 +475,8 @@ struct SearchResult {
 template <typename V>
 struct SearchResult<V, false> {
   SearchResult() {}
-  explicit SearchResult(V value) : value(value) {}
-  SearchResult(V value, MatchKind /*match*/) : value(value) {}
+  explicit SearchResult(V v) : value(v) {}
+  SearchResult(V v, MatchKind /*match*/) : value(v) {}
 
   V value;
 
@@ -471,6 +493,7 @@ class btree_node {
   using field_type = typename Params::node_count_type;
   using allocator_type = typename Params::allocator_type;
   using slot_type = typename Params::slot_type;
+  using original_key_compare = typename Params::original_key_compare;
 
  public:
   using params_type = Params;
@@ -492,21 +515,28 @@ class btree_node {
   //   - Otherwise, choose binary.
   // TODO(ezb): Might make sense to add condition(s) based on node-size.
   using use_linear_search = std::integral_constant<
-      bool,
-      has_linear_node_search_preference<key_compare>::value
-          ? prefers_linear_node_search<key_compare>::value
-          : has_linear_node_search_preference<key_type>::value
+      bool, has_linear_node_search_preference<original_key_compare>::value
+                ? prefers_linear_node_search<original_key_compare>::value
+            : has_linear_node_search_preference<key_type>::value
                 ? prefers_linear_node_search<key_type>::value
                 : std::is_arithmetic<key_type>::value &&
-                      (std::is_same<std::less<key_type>, key_compare>::value ||
+                      (std::is_same<std::less<key_type>,
+                                    original_key_compare>::value ||
                        std::is_same<std::greater<key_type>,
-                                    key_compare>::value)>;
+                                    original_key_compare>::value)>;
 
   // This class is organized by absl::container_internal::Layout as if it had
   // the following structure:
   //   // A pointer to the node's parent.
   //   btree_node *parent;
   //
+  //   // When ABSL_BTREE_ENABLE_GENERATIONS is defined, we also have a
+  //   // generation integer in order to check that when iterators are
+  //   // used, they haven't been invalidated already. Only the generation on
+  //   // the root is used, but we have one on each node because whether a node
+  //   // is root or not can change.
+  //   uint32_t generation;
+  //
   //   // The position of the node in the node's parent.
   //   field_type position;
   //   // The index of the first populated value in `values`.
@@ -553,63 +583,71 @@ class btree_node {
   btree_node() = default;
 
  private:
-  using layout_type = absl::container_internal::Layout<btree_node *, field_type,
-                                                       slot_type, btree_node *>;
+  using layout_type =
+      absl::container_internal::Layout<btree_node *, uint32_t, field_type,
+                                       slot_type, btree_node *>;
   constexpr static size_type SizeWithNSlots(size_type n) {
-    return layout_type(/*parent*/ 1,
-                       /*position, start, finish, max_count*/ 4,
-                       /*slots*/ n,
-                       /*children*/ 0)
+    return layout_type(
+               /*parent*/ 1,
+               /*generation*/ params_type::kEnableGenerations ? 1 : 0,
+               /*position, start, finish, max_count*/ 4,
+               /*slots*/ n,
+               /*children*/ 0)
         .AllocSize();
   }
-  // A lower bound for the overhead of fields other than values in a leaf node.
+  // A lower bound for the overhead of fields other than slots in a leaf node.
   constexpr static size_type MinimumOverhead() {
-    return SizeWithNSlots(1) - sizeof(value_type);
+    return SizeWithNSlots(1) - sizeof(slot_type);
   }
 
   // Compute how many values we can fit onto a leaf node taking into account
   // padding.
-  constexpr static size_type NodeTargetSlots(const int begin, const int end) {
+  constexpr static size_type NodeTargetSlots(const size_type begin,
+                                             const size_type end) {
     return begin == end ? begin
-                        : SizeWithNSlots((begin + end) / 2 + 1) >
-                                  params_type::kTargetNodeSize
-                              ? NodeTargetSlots(begin, (begin + end) / 2)
-                              : NodeTargetSlots((begin + end) / 2 + 1, end);
+           : SizeWithNSlots((begin + end) / 2 + 1) >
+                   params_type::kTargetNodeSize
+               ? NodeTargetSlots(begin, (begin + end) / 2)
+               : NodeTargetSlots((begin + end) / 2 + 1, end);
   }
 
-  enum {
-    kTargetNodeSize = params_type::kTargetNodeSize,
-    kNodeTargetSlots = NodeTargetSlots(0, params_type::kTargetNodeSize),
-
-    // We need a minimum of 3 slots per internal node in order to perform
-    // splitting (1 value for the two nodes involved in the split and 1 value
-    // propagated to the parent as the delimiter for the split). For performance
-    // reasons, we don't allow 3 slots-per-node due to bad worst case occupancy
-    // of 1/3 (for a node, not a b-tree).
-    kMinNodeSlots = 4,
-
-    kNodeSlots =
-        kNodeTargetSlots >= kMinNodeSlots ? kNodeTargetSlots : kMinNodeSlots,
-
-    // The node is internal (i.e. is not a leaf node) if and only if `max_count`
-    // has this value.
-    kInternalNodeMaxCount = 0,
-  };
+  constexpr static size_type kTargetNodeSize = params_type::kTargetNodeSize;
+  constexpr static size_type kNodeTargetSlots =
+      NodeTargetSlots(0, kTargetNodeSize);
+
+  // We need a minimum of 3 slots per internal node in order to perform
+  // splitting (1 value for the two nodes involved in the split and 1 value
+  // propagated to the parent as the delimiter for the split). For performance
+  // reasons, we don't allow 3 slots-per-node due to bad worst case occupancy of
+  // 1/3 (for a node, not a b-tree).
+  constexpr static size_type kMinNodeSlots = 4;
+
+  constexpr static size_type kNodeSlots =
+      kNodeTargetSlots >= kMinNodeSlots ? kNodeTargetSlots : kMinNodeSlots;
+
+  // The node is internal (i.e. is not a leaf node) if and only if `max_count`
+  // has this value.
+  constexpr static field_type kInternalNodeMaxCount = 0;
 
   // Leaves can have less than kNodeSlots values.
-  constexpr static layout_type LeafLayout(const int slot_count = kNodeSlots) {
-    return layout_type(/*parent*/ 1,
-                       /*position, start, finish, max_count*/ 4,
-                       /*slots*/ slot_count,
-                       /*children*/ 0);
+  constexpr static layout_type LeafLayout(
+      const size_type slot_count = kNodeSlots) {
+    return layout_type(
+        /*parent*/ 1,
+        /*generation*/ params_type::kEnableGenerations ? 1 : 0,
+        /*position, start, finish, max_count*/ 4,
+        /*slots*/ slot_count,
+        /*children*/ 0);
   }
   constexpr static layout_type InternalLayout() {
-    return layout_type(/*parent*/ 1,
-                       /*position, start, finish, max_count*/ 4,
-                       /*slots*/ kNodeSlots,
-                       /*children*/ kNodeSlots + 1);
-  }
-  constexpr static size_type LeafSize(const int slot_count = kNodeSlots) {
+    return layout_type(
+        /*parent*/ 1,
+        /*generation*/ params_type::kEnableGenerations ? 1 : 0,
+        /*position, start, finish, max_count*/ 4,
+        /*slots*/ kNodeSlots,
+        /*children*/ kNodeSlots + 1);
+  }
+  constexpr static size_type LeafSize(const size_type slot_count = kNodeSlots) {
     return LeafLayout(slot_count).AllocSize();
   }
   constexpr static size_type InternalSize() {
@@ -621,44 +659,47 @@ class btree_node {
   template <size_type N>
   inline typename layout_type::template ElementType<N> *GetField() {
     // We assert that we don't read from values that aren't there.
-    assert(N < 3 || !leaf());
+    assert(N < 4 || is_internal());
     return InternalLayout().template Pointer<N>(reinterpret_cast<char *>(this));
   }
   template <size_type N>
   inline const typename layout_type::template ElementType<N> *GetField() const {
-    assert(N < 3 || !leaf());
+    assert(N < 4 || is_internal());
     return InternalLayout().template Pointer<N>(
         reinterpret_cast<const char *>(this));
   }
   void set_parent(btree_node *p) { *GetField<0>() = p; }
-  field_type &mutable_finish() { return GetField<1>()[2]; }
-  slot_type *slot(int i) { return &GetField<2>()[i]; }
+  field_type &mutable_finish() { return GetField<2>()[2]; }
+  slot_type *slot(size_type i) { return &GetField<3>()[i]; }
   slot_type *start_slot() { return slot(start()); }
   slot_type *finish_slot() { return slot(finish()); }
-  const slot_type *slot(int i) const { return &GetField<2>()[i]; }
-  void set_position(field_type v) { GetField<1>()[0] = v; }
-  void set_start(field_type v) { GetField<1>()[1] = v; }
-  void set_finish(field_type v) { GetField<1>()[2] = v; }
+  const slot_type *slot(size_type i) const { return &GetField<3>()[i]; }
+  void set_position(field_type v) { GetField<2>()[0] = v; }
+  void set_start(field_type v) { GetField<2>()[1] = v; }
+  void set_finish(field_type v) { GetField<2>()[2] = v; }
   // This method is only called by the node init methods.
-  void set_max_count(field_type v) { GetField<1>()[3] = v; }
+  void set_max_count(field_type v) { GetField<2>()[3] = v; }
 
  public:
   // Whether this is a leaf node or not. This value doesn't change after the
   // node is created.
-  bool leaf() const { return GetField<1>()[3] != kInternalNodeMaxCount; }
+  bool is_leaf() const { return GetField<2>()[3] != kInternalNodeMaxCount; }
+  // Whether this is an internal node or not. This value doesn't change after
+  // the node is created.
+  bool is_internal() const { return !is_leaf(); }
 
   // Getter for the position of this node in its parent.
-  field_type position() const { return GetField<1>()[0]; }
+  field_type position() const { return GetField<2>()[0]; }
 
   // Getter for the offset of the first value in the `values` array.
   field_type start() const {
-    // TODO(ezb): when floating storage is implemented, return GetField<1>()[1];
-    assert(GetField<1>()[1] == 0);
+    // TODO(ezb): when floating storage is implemented, return GetField<2>()[1];
+    assert(GetField<2>()[1] == 0);
     return 0;
   }
 
   // Getter for the offset after the last value in the `values` array.
-  field_type finish() const { return GetField<1>()[2]; }
+  field_type finish() const { return GetField<2>()[2]; }
 
   // Getters for the number of values stored in this node.
   field_type count() const {
@@ -668,7 +709,7 @@ class btree_node {
   field_type max_count() const {
     // Internal nodes have max_count==kInternalNodeMaxCount.
     // Leaf nodes have max_count in [1, kNodeSlots].
-    const field_type max_count = GetField<1>()[3];
+    const field_type max_count = GetField<2>()[3];
     return max_count == field_type{kInternalNodeMaxCount}
                ? field_type{kNodeSlots}
                : max_count;
@@ -679,58 +720,83 @@ class btree_node {
   // Getter for whether the node is the root of the tree. The parent of the
   // root of the tree is the leftmost node in the tree which is guaranteed to
   // be a leaf.
-  bool is_root() const { return parent()->leaf(); }
+  bool is_root() const { return parent()->is_leaf(); }
   void make_root() {
     assert(parent()->is_root());
+    set_generation(parent()->generation());
     set_parent(parent()->parent());
   }
 
+  // Gets the root node's generation integer, which is the one used by the tree.
+  uint32_t *get_root_generation() const {
+    assert(params_type::kEnableGenerations);
+    const btree_node *curr = this;
+    for (; !curr->is_root(); curr = curr->parent()) continue;
+    return const_cast<uint32_t *>(&curr->GetField<1>()[0]);
+  }
+
+  // Returns the generation for iterator validation.
+  uint32_t generation() const {
+    return params_type::kEnableGenerations ? *get_root_generation() : 0;
+  }
+  // Updates generation. Should only be called on a root node or during node
+  // initialization.
+  void set_generation(uint32_t generation) {
+    if (params_type::kEnableGenerations) GetField<1>()[0] = generation;
+  }
+  // Updates the generation. We do this whenever the node is mutated.
+  void next_generation() {
+    if (params_type::kEnableGenerations) ++*get_root_generation();
+  }
+
   // Getters for the key/value at position i in the node.
-  const key_type &key(int i) const { return params_type::key(slot(i)); }
-  reference value(int i) { return params_type::element(slot(i)); }
-  const_reference value(int i) const { return params_type::element(slot(i)); }
+  const key_type &key(size_type i) const { return params_type::key(slot(i)); }
+  reference value(size_type i) { return params_type::element(slot(i)); }
+  const_reference value(size_type i) const {
+    return params_type::element(slot(i));
+  }
 
   // Getters/setter for the child at position i in the node.
-  btree_node *child(int i) const { return GetField<3>()[i]; }
+  btree_node *child(field_type i) const { return GetField<4>()[i]; }
   btree_node *start_child() const { return child(start()); }
-  btree_node *&mutable_child(int i) { return GetField<3>()[i]; }
-  void clear_child(int i) {
+  btree_node *&mutable_child(field_type i) { return GetField<4>()[i]; }
+  void clear_child(field_type i) {
     absl::container_internal::SanitizerPoisonObject(&mutable_child(i));
   }
-  void set_child(int i, btree_node *c) {
+  void set_child(field_type i, btree_node *c) {
     absl::container_internal::SanitizerUnpoisonObject(&mutable_child(i));
     mutable_child(i) = c;
     c->set_position(i);
   }
-  void init_child(int i, btree_node *c) {
+  void init_child(field_type i, btree_node *c) {
     set_child(i, c);
     c->set_parent(this);
   }
 
   // Returns the position of the first value whose key is not less than k.
   template <typename K>
-  SearchResult<int, is_key_compare_to::value> lower_bound(
+  SearchResult<size_type, is_key_compare_to::value> lower_bound(
       const K &k, const key_compare &comp) const {
     return use_linear_search::value ? linear_search(k, comp)
                                     : binary_search(k, comp);
   }
   // Returns the position of the first value whose key is greater than k.
   template <typename K>
-  int upper_bound(const K &k, const key_compare &comp) const {
+  size_type upper_bound(const K &k, const key_compare &comp) const {
     auto upper_compare = upper_bound_adapter<key_compare>(comp);
     return use_linear_search::value ? linear_search(k, upper_compare).value
                                     : binary_search(k, upper_compare).value;
   }
 
   template <typename K, typename Compare>
-  SearchResult<int, btree_is_key_compare_to<Compare, key_type>::value>
+  SearchResult<size_type, btree_is_key_compare_to<Compare, key_type>::value>
   linear_search(const K &k, const Compare &comp) const {
     return linear_search_impl(k, start(), finish(), comp,
                               btree_is_key_compare_to<Compare, key_type>());
   }
 
   template <typename K, typename Compare>
-  SearchResult<int, btree_is_key_compare_to<Compare, key_type>::value>
+  SearchResult<size_type, btree_is_key_compare_to<Compare, key_type>::value>
   binary_search(const K &k, const Compare &comp) const {
     return binary_search_impl(k, start(), finish(), comp,
                               btree_is_key_compare_to<Compare, key_type>());
@@ -739,8 +805,8 @@ class btree_node {
   // Returns the position of the first value whose key is not less than k using
   // linear search performed using plain compare.
   template <typename K, typename Compare>
-  SearchResult<int, false> linear_search_impl(
-      const K &k, int s, const int e, const Compare &comp,
+  SearchResult<size_type, false> linear_search_impl(
+      const K &k, size_type s, const size_type e, const Compare &comp,
       std::false_type /* IsCompareTo */) const {
     while (s < e) {
       if (!comp(key(s), k)) {
@@ -748,14 +814,14 @@ class btree_node {
       }
       ++s;
     }
-    return SearchResult<int, false>{s};
+    return SearchResult<size_type, false>{s};
   }
 
   // Returns the position of the first value whose key is not less than k using
   // linear search performed using compare-to.
   template <typename K, typename Compare>
-  SearchResult<int, true> linear_search_impl(
-      const K &k, int s, const int e, const Compare &comp,
+  SearchResult<size_type, true> linear_search_impl(
+      const K &k, size_type s, const size_type e, const Compare &comp,
       std::true_type /* IsCompareTo */) const {
     while (s < e) {
       const absl::weak_ordering c = comp(key(s), k);
@@ -772,30 +838,30 @@ class btree_node {
   // Returns the position of the first value whose key is not less than k using
   // binary search performed using plain compare.
   template <typename K, typename Compare>
-  SearchResult<int, false> binary_search_impl(
-      const K &k, int s, int e, const Compare &comp,
+  SearchResult<size_type, false> binary_search_impl(
+      const K &k, size_type s, size_type e, const Compare &comp,
       std::false_type /* IsCompareTo */) const {
     while (s != e) {
-      const int mid = (s + e) >> 1;
+      const size_type mid = (s + e) >> 1;
       if (comp(key(mid), k)) {
         s = mid + 1;
       } else {
         e = mid;
       }
     }
-    return SearchResult<int, false>{s};
+    return SearchResult<size_type, false>{s};
   }
 
   // Returns the position of the first value whose key is not less than k using
   // binary search performed using compare-to.
   template <typename K, typename CompareTo>
-  SearchResult<int, true> binary_search_impl(
-      const K &k, int s, int e, const CompareTo &comp,
+  SearchResult<size_type, true> binary_search_impl(
+      const K &k, size_type s, size_type e, const CompareTo &comp,
       std::true_type /* IsCompareTo */) const {
     if (params_type::template can_have_multiple_equivalent_keys<K>()) {
       MatchKind exact_match = MatchKind::kNe;
       while (s != e) {
-        const int mid = (s + e) >> 1;
+        const size_type mid = (s + e) >> 1;
         const absl::weak_ordering c = comp(key(mid), k);
         if (c < 0) {
           s = mid + 1;
@@ -812,7 +878,7 @@ class btree_node {
       return {s, exact_match};
     } else {  // Can't have multiple equivalent keys.
       while (s != e) {
-        const int mid = (s + e) >> 1;
+        const size_type mid = (s + e) >> 1;
         const absl::weak_ordering c = comp(key(mid), k);
         if (c < 0) {
           s = mid + 1;
@@ -829,7 +895,7 @@ class btree_node {
   // Emplaces a value at position i, shifting all existing values and
   // children at positions >= i to the right by 1.
   template <typename... Args>
-  void emplace_value(size_type i, allocator_type *alloc, Args &&... args);
+  void emplace_value(field_type i, allocator_type *alloc, Args &&...args);
 
   // Removes the values at positions [i, i + to_erase), shifting all existing
   // values and children after that range to the left by to_erase. Clears all
@@ -837,9 +903,9 @@ class btree_node {
   void remove_values(field_type i, field_type to_erase, allocator_type *alloc);
 
   // Rebalances a node with its right sibling.
-  void rebalance_right_to_left(int to_move, btree_node *right,
+  void rebalance_right_to_left(field_type to_move, btree_node *right,
                                allocator_type *alloc);
-  void rebalance_left_to_right(int to_move, btree_node *right,
+  void rebalance_left_to_right(field_type to_move, btree_node *right,
                                allocator_type *alloc);
 
   // Splits a node, moving a portion of the node's values to its right sibling.
@@ -850,7 +916,8 @@ class btree_node {
   void merge(btree_node *src, allocator_type *alloc);
 
   // Node allocation/deletion routines.
-  void init_leaf(btree_node *parent, int max_count) {
+  void init_leaf(field_type max_count, btree_node *parent) {
+    set_generation(0);
     set_parent(parent);
     set_position(0);
     set_start(0);
@@ -860,7 +927,7 @@ class btree_node {
         start_slot(), max_count * sizeof(slot_type));
   }
   void init_internal(btree_node *parent) {
-    init_leaf(parent, kNodeSlots);
+    init_leaf(kNodeSlots, parent);
     // Set `max_count` to a sentinel value to indicate that this node is
     // internal.
     set_max_count(kInternalNodeMaxCount);
@@ -870,6 +937,7 @@ class btree_node {
 
   static void deallocate(const size_type size, btree_node *node,
                          allocator_type *alloc) {
+    absl::container_internal::SanitizerUnpoisonMemoryRegion(node, size);
     absl::container_internal::Deallocate<Alignment()>(alloc, node, size);
   }
 
@@ -878,16 +946,19 @@ class btree_node {
 
  private:
   template <typename... Args>
-  void value_init(const field_type i, allocator_type *alloc, Args &&... args) {
+  void value_init(const field_type i, allocator_type *alloc, Args &&...args) {
+    next_generation();
     absl::container_internal::SanitizerUnpoisonObject(slot(i));
     params_type::construct(alloc, slot(i), std::forward<Args>(args)...);
   }
   void value_destroy(const field_type i, allocator_type *alloc) {
+    next_generation();
     params_type::destroy(alloc, slot(i));
     absl::container_internal::SanitizerPoisonObject(slot(i));
   }
   void value_destroy_n(const field_type i, const field_type n,
                        allocator_type *alloc) {
+    next_generation();
     for (slot_type *s = slot(i), *end = slot(i + n); s != end; ++s) {
       params_type::destroy(alloc, s);
       absl::container_internal::SanitizerPoisonObject(s);
@@ -903,6 +974,7 @@ class btree_node {
   // Transfers value from slot `src_i` in `src_node` to slot `dest_i` in `this`.
   void transfer(const size_type dest_i, const size_type src_i,
                 btree_node *src_node, allocator_type *alloc) {
+    next_generation();
     transfer(slot(dest_i), src_node->slot(src_i), alloc);
   }
 
@@ -911,6 +983,7 @@ class btree_node {
   void transfer_n(const size_type n, const size_type dest_i,
                   const size_type src_i, btree_node *src_node,
                   allocator_type *alloc) {
+    next_generation();
     for (slot_type *src = src_node->slot(src_i), *end = src + n,
                    *dest = slot(dest_i);
          src != end; ++src, ++dest) {
@@ -923,23 +996,30 @@ class btree_node {
   void transfer_n_backward(const size_type n, const size_type dest_i,
                            const size_type src_i, btree_node *src_node,
                            allocator_type *alloc) {
-    for (slot_type *src = src_node->slot(src_i + n - 1), *end = src - n,
-                   *dest = slot(dest_i + n - 1);
+    next_generation();
+    for (slot_type *src = src_node->slot(src_i + n), *end = src - n,
+                   *dest = slot(dest_i + n);
          src != end; --src, --dest) {
-      transfer(dest, src, alloc);
+      // If we modified the loop index calculations above to avoid the -1s here,
+      // it would result in UB in the computation of `end` (and possibly `src`
+      // as well, if n == 0), since slot() is effectively an array index and it
+      // is UB to compute the address of any out-of-bounds array element except
+      // for one-past-the-end.
+      transfer(dest - 1, src - 1, alloc);
     }
   }
 
   template <typename P>
   friend class btree;
   template <typename N, typename R, typename P>
-  friend struct btree_iterator;
+  friend class btree_iterator;
   friend class BtreeNodePeer;
+  friend struct btree_access;
 };
 
 template <typename Node, typename Reference, typename Pointer>
-struct btree_iterator {
- private:
+class btree_iterator {
+  using field_type = typename Node::field_type;
   using key_type = typename Node::key_type;
   using size_type = typename Node::size_type;
   using params_type = typename Node::params_type;
@@ -967,9 +1047,15 @@ struct btree_iterator {
   using reference = Reference;
   using iterator_category = std::bidirectional_iterator_tag;
 
-  btree_iterator() : node(nullptr), position(-1) {}
-  explicit btree_iterator(Node *n) : node(n), position(n->start()) {}
-  btree_iterator(Node *n, int p) : node(n), position(p) {}
+  btree_iterator() : btree_iterator(nullptr, -1) {}
+  explicit btree_iterator(Node *n) : btree_iterator(n, n->start()) {}
+  btree_iterator(Node *n, int p) : node_(n), position_(p) {
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+    // Use `~uint32_t{}` as a sentinel value for iterator generations so it
+    // doesn't match the initial value for the actual generation.
+    generation_ = n != nullptr ? n->generation() : ~uint32_t{};
+#endif
+  }
 
   // NOTE: this SFINAE allows for implicit conversions from iterator to
   // const_iterator, but it specifically avoids hiding the copy constructor so
@@ -980,58 +1066,45 @@ struct btree_iterator {
                     std::is_same<btree_iterator, const_iterator>::value,
                 int> = 0>
   btree_iterator(const btree_iterator<N, R, P> other)  // NOLINT
-      : node(other.node), position(other.position) {}
-
- private:
-  // This SFINAE allows explicit conversions from const_iterator to
-  // iterator, but also avoids hiding the copy constructor.
-  // NOTE: the const_cast is safe because this constructor is only called by
-  // non-const methods and the container owns the nodes.
-  template <typename N, typename R, typename P,
-            absl::enable_if_t<
-                std::is_same<btree_iterator<N, R, P>, const_iterator>::value &&
-                    std::is_same<btree_iterator, iterator>::value,
-                int> = 0>
-  explicit btree_iterator(const btree_iterator<N, R, P> other)
-      : node(const_cast<node_type *>(other.node)), position(other.position) {}
-
-  // Increment/decrement the iterator.
-  void increment() {
-    if (node->leaf() && ++position < node->finish()) {
-      return;
-    }
-    increment_slow();
-  }
-  void increment_slow();
-
-  void decrement() {
-    if (node->leaf() && --position >= node->start()) {
-      return;
-    }
-    decrement_slow();
+      : node_(other.node_), position_(other.position_) {
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+    generation_ = other.generation_;
+#endif
   }
-  void decrement_slow();
 
- public:
   bool operator==(const iterator &other) const {
-    return node == other.node && position == other.position;
+    return node_ == other.node_ && position_ == other.position_;
   }
   bool operator==(const const_iterator &other) const {
-    return node == other.node && position == other.position;
+    return node_ == other.node_ && position_ == other.position_;
   }
   bool operator!=(const iterator &other) const {
-    return node != other.node || position != other.position;
+    return node_ != other.node_ || position_ != other.position_;
   }
   bool operator!=(const const_iterator &other) const {
-    return node != other.node || position != other.position;
+    return node_ != other.node_ || position_ != other.position_;
+  }
+
+  // Returns n such that n calls to ++other yields *this.
+  // Precondition: n exists.
+  difference_type operator-(const_iterator other) const {
+    if (node_ == other.node_) {
+      if (node_->is_leaf()) return position_ - other.position_;
+      if (position_ == other.position_) return 0;
+    }
+    return distance_slow(other);
   }
 
   // Accessors for the key/value the iterator is pointing at.
   reference operator*() const {
-    ABSL_HARDENING_ASSERT(node != nullptr);
-    ABSL_HARDENING_ASSERT(node->start() <= position);
-    ABSL_HARDENING_ASSERT(node->finish() > position);
-    return node->value(position);
+    ABSL_HARDENING_ASSERT(node_ != nullptr);
+    assert_valid_generation();
+    ABSL_HARDENING_ASSERT(position_ >= node_->start());
+    if (position_ >= node_->finish()) {
+      ABSL_HARDENING_ASSERT(!IsEndIterator() && "Dereferencing end() iterator");
+      ABSL_HARDENING_ASSERT(position_ < node_->finish());
+    }
+    return node_->value(static_cast<field_type>(position_));
   }
   pointer operator->() const { return &operator*(); }
 
@@ -1069,23 +1142,100 @@ struct btree_iterator {
   friend class btree_multiset_container;
   template <typename TreeType, typename CheckerType>
   friend class base_checker;
+  friend struct btree_access;
 
-  const key_type &key() const { return node->key(position); }
-  slot_type *slot() { return node->slot(position); }
+  // This SFINAE allows explicit conversions from const_iterator to
+  // iterator, but also avoids hiding the copy constructor.
+  // NOTE: the const_cast is safe because this constructor is only called by
+  // non-const methods and the container owns the nodes.
+  template <typename N, typename R, typename P,
+            absl::enable_if_t<
+                std::is_same<btree_iterator<N, R, P>, const_iterator>::value &&
+                    std::is_same<btree_iterator, iterator>::value,
+                int> = 0>
+  explicit btree_iterator(const btree_iterator<N, R, P> other)
+      : node_(const_cast<node_type *>(other.node_)),
+        position_(other.position_) {
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+    generation_ = other.generation_;
+#endif
+  }
+
+  bool IsEndIterator() const {
+    if (position_ != node_->finish()) return false;
+    // Navigate to the rightmost node.
+    node_type *node = node_;
+    while (!node->is_root()) node = node->parent();
+    while (node->is_internal()) node = node->child(node->finish());
+    return node == node_;
+  }
+
+  // Returns n such that n calls to ++other yields *this.
+  // Precondition: n exists && (this->node_ != other.node_ ||
+  // !this->node_->is_leaf() || this->position_ != other.position_).
+  difference_type distance_slow(const_iterator other) const;
+
+  // Increment/decrement the iterator.
+  void increment() {
+    assert_valid_generation();
+    if (node_->is_leaf() && ++position_ < node_->finish()) {
+      return;
+    }
+    increment_slow();
+  }
+  void increment_slow();
+
+  void decrement() {
+    assert_valid_generation();
+    if (node_->is_leaf() && --position_ >= node_->start()) {
+      return;
+    }
+    decrement_slow();
+  }
+  void decrement_slow();
+
+  // Updates the generation. For use internally right before we return an
+  // iterator to the user.
+  void update_generation() {
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+    if (node_ != nullptr) generation_ = node_->generation();
+#endif
+  }
+
+  const key_type &key() const {
+    return node_->key(static_cast<size_type>(position_));
+  }
+  decltype(std::declval<Node *>()->slot(0)) slot() {
+    return node_->slot(static_cast<size_type>(position_));
+  }
+
+  void assert_valid_generation() const {
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+    if (node_ != nullptr && node_->generation() != generation_) {
+      ABSL_INTERNAL_LOG(
+          FATAL,
+          "Attempting to use an invalidated iterator. The corresponding b-tree "
+          "container has been mutated since this iterator was constructed.");
+    }
+#endif
+  }
 
   // The node in the tree the iterator is pointing at.
-  Node *node;
+  Node *node_;
   // The position within the node of the tree the iterator is pointing at.
   // NOTE: this is an int rather than a field_type because iterators can point
   // to invalid positions (such as -1) in certain circumstances.
-  int position;
+  int position_;
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+  // Used to check that the iterator hasn't been invalidated.
+  uint32_t generation_;
+#endif
 };
 
 template <typename Params>
 class btree {
   using node_type = btree_node<Params>;
   using is_key_compare_to = typename Params::is_key_compare_to;
-  using init_type = typename Params::init_type;
   using field_type = typename node_type::field_type;
 
   // We use a static empty node for the root/leftmost/rightmost of empty btrees
@@ -1093,6 +1243,9 @@ class btree {
   struct alignas(node_type::Alignment()) EmptyNodeType : node_type {
     using field_type = typename node_type::field_type;
     node_type *parent;
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+    uint32_t generation = 0;
+#endif
     field_type position = 0;
     field_type start = 0;
     field_type finish = 0;
@@ -1104,7 +1257,7 @@ class btree {
     // MSVC has constexpr code generations bugs here.
     EmptyNodeType() : parent(this) {}
 #else
-    constexpr EmptyNodeType(node_type *p) : parent(p) {}
+    explicit constexpr EmptyNodeType(node_type *p) : parent(p) {}
 #endif
   };
 
@@ -1166,14 +1319,6 @@ class btree {
   using slot_type = typename Params::slot_type;
 
  private:
-  // For use in copy_or_move_values_in_order.
-  const value_type &maybe_move_from_iterator(const_iterator it) { return *it; }
-  value_type &&maybe_move_from_iterator(iterator it) {
-    // This is a destructive operation on the other container so it's safe for
-    // us to const_cast and move from the keys here even if it's a set.
-    return std::move(const_cast<value_type &>(*it));
-  }
-
   // Copies or moves (depending on the template parameter) the values in
   // other into this btree in their order in other. This btree must be empty
   // before this method is called. This method is used in copy construction,
@@ -1186,7 +1331,7 @@ class btree {
 
  public:
   btree(const key_compare &comp, const allocator_type &alloc)
-      : root_(comp, alloc, EmptyNode()), rightmost_(EmptyNode()), size_(0) {}
+      : root_(EmptyNode()), rightmost_(comp, alloc, EmptyNode()), size_(0) {}
 
   btree(const btree &other) : btree(other, other.allocator()) {}
   btree(const btree &other, const allocator_type &alloc)
@@ -1194,10 +1339,10 @@ class btree {
     copy_or_move_values_in_order(other);
   }
   btree(btree &&other) noexcept
-      : root_(std::move(other.root_)),
-        rightmost_(absl::exchange(other.rightmost_, EmptyNode())),
-        size_(absl::exchange(other.size_, 0)) {
-    other.mutable_root() = EmptyNode();
+      : root_(absl::exchange(other.root_, EmptyNode())),
+        rightmost_(std::move(other.rightmost_)),
+        size_(absl::exchange(other.size_, 0u)) {
+    other.mutable_rightmost() = EmptyNode();
   }
   btree(btree &&other, const allocator_type &alloc)
       : btree(other.key_comp(), alloc) {
@@ -1222,9 +1367,9 @@ class btree {
 
   iterator begin() { return iterator(leftmost()); }
   const_iterator begin() const { return const_iterator(leftmost()); }
-  iterator end() { return iterator(rightmost_, rightmost_->finish()); }
+  iterator end() { return iterator(rightmost(), rightmost()->finish()); }
   const_iterator end() const {
-    return const_iterator(rightmost_, rightmost_->finish());
+    return const_iterator(rightmost(), rightmost()->finish());
   }
   reverse_iterator rbegin() { return reverse_iterator(end()); }
   const_reverse_iterator rbegin() const {
@@ -1275,7 +1420,7 @@ class btree {
   // Requirement: if `key` already exists in the btree, does not consume `args`.
   // Requirement: `key` is never referenced after consuming `args`.
   template <typename K, typename... Args>
-  std::pair<iterator, bool> insert_unique(const K &key, Args &&... args);
+  std::pair<iterator, bool> insert_unique(const K &key, Args &&...args);
 
   // Inserts with hint. Checks to see if the value should be placed immediately
   // before `position` in the tree. If so, then the insertion will take
@@ -1284,9 +1429,8 @@ class btree {
   // Requirement: if `key` already exists in the btree, does not consume `args`.
   // Requirement: `key` is never referenced after consuming `args`.
   template <typename K, typename... Args>
-  std::pair<iterator, bool> insert_hint_unique(iterator position,
-                                               const K &key,
-                                               Args &&... args);
+  std::pair<iterator, bool> insert_hint_unique(iterator position, const K &key,
+                                               Args &&...args);
 
   // Insert a range of values into the btree.
   // Note: the first overload avoids constructing a value_type if the key
@@ -1350,7 +1494,7 @@ class btree {
   void swap(btree &other);
 
   const key_compare &key_comp() const noexcept {
-    return root_.template get<0>();
+    return rightmost_.template get<0>();
   }
   template <typename K1, typename K2>
   bool compare_keys(const K1 &a, const K2 &b) const {
@@ -1397,6 +1541,7 @@ class btree {
   }
 
   // The total number of bytes used by the btree.
+  // TODO(b/169338300): update to support node_btree_*.
   size_type bytes_used() const {
     node_stats stats = internal_stats(root());
     if (stats.leaf_nodes == 1 && stats.internal_nodes == 0) {
@@ -1412,8 +1557,7 @@ class btree {
   static double average_bytes_per_value() {
     // The expected number of values per node with random insertion order is the
     // average of the maximum and minimum numbers of values per node.
-    const double expected_values_per_node =
-        (kNodeSlots + kMinNodeValues) / 2.0;
+    const double expected_values_per_node = (kNodeSlots + kMinNodeValues) / 2.0;
     return node_type::LeafSize() / expected_values_per_node;
   }
 
@@ -1440,11 +1584,20 @@ class btree {
   allocator_type get_allocator() const { return allocator(); }
 
  private:
+  friend struct btree_access;
+
   // Internal accessor routines.
-  node_type *root() { return root_.template get<2>(); }
-  const node_type *root() const { return root_.template get<2>(); }
-  node_type *&mutable_root() noexcept { return root_.template get<2>(); }
-  key_compare *mutable_key_comp() noexcept { return &root_.template get<0>(); }
+  node_type *root() { return root_; }
+  const node_type *root() const { return root_; }
+  node_type *&mutable_root() noexcept { return root_; }
+  node_type *rightmost() { return rightmost_.template get<2>(); }
+  const node_type *rightmost() const { return rightmost_.template get<2>(); }
+  node_type *&mutable_rightmost() noexcept {
+    return rightmost_.template get<2>();
+  }
+  key_compare *mutable_key_comp() noexcept {
+    return &rightmost_.template get<0>();
+  }
 
   // The leftmost node is stored as the parent of the root node.
   node_type *leftmost() { return root()->parent(); }
@@ -1452,15 +1605,15 @@ class btree {
 
   // Allocator routines.
   allocator_type *mutable_allocator() noexcept {
-    return &root_.template get<1>();
+    return &rightmost_.template get<1>();
   }
   const allocator_type &allocator() const noexcept {
-    return root_.template get<1>();
+    return rightmost_.template get<1>();
   }
 
   // Allocates a correctly aligned node of at least size bytes using the
   // allocator.
-  node_type *allocate(const size_type size) {
+  node_type *allocate(size_type size) {
     return reinterpret_cast<node_type *>(
         absl::container_internal::Allocate<node_type::Alignment()>(
             mutable_allocator(), size));
@@ -1474,12 +1627,12 @@ class btree {
   }
   node_type *new_leaf_node(node_type *parent) {
     node_type *n = allocate(node_type::LeafSize());
-    n->init_leaf(parent, kNodeSlots);
+    n->init_leaf(kNodeSlots, parent);
     return n;
   }
-  node_type *new_leaf_root_node(const int max_count) {
+  node_type *new_leaf_root_node(field_type max_count) {
     node_type *n = allocate(node_type::LeafSize(max_count));
-    n->init_leaf(/*parent=*/n, max_count);
+    n->init_leaf(max_count, /*parent=*/n);
     return n;
   }
 
@@ -1503,22 +1656,21 @@ class btree {
   void try_shrink();
 
   iterator internal_end(iterator iter) {
-    return iter.node != nullptr ? iter : end();
+    return iter.node_ != nullptr ? iter : end();
   }
   const_iterator internal_end(const_iterator iter) const {
-    return iter.node != nullptr ? iter : end();
+    return iter.node_ != nullptr ? iter : end();
   }
 
   // Emplaces a value into the btree immediately before iter. Requires that
   // key(v) <= iter.key() and (--iter).key() <= key(v).
   template <typename... Args>
-  iterator internal_emplace(iterator iter, Args &&... args);
+  iterator internal_emplace(iterator iter, Args &&...args);
 
   // Returns an iterator pointing to the first value >= the value "iter" is
   // pointing at. Note that "iter" might be pointing to an invalid location such
-  // as iter.position == iter.node->finish(). This routine simply moves iter up
-  // in the tree to a valid location.
-  // Requires: iter.node is non-null.
+  // as iter.position_ == iter.node_->finish(). This routine simply moves iter
+  // up in the tree to a valid location. Requires: iter.node_ is non-null.
   template <typename IterType>
   static IterType internal_last(IterType iter);
 
@@ -1546,15 +1698,15 @@ class btree {
   iterator internal_find(const K &key) const;
 
   // Verifies the tree structure of node.
-  int internal_verify(const node_type *node, const key_type *lo,
-                      const key_type *hi) const;
+  size_type internal_verify(const node_type *node, const key_type *lo,
+                            const key_type *hi) const;
 
   node_stats internal_stats(const node_type *node) const {
     // The root can be a static empty node.
     if (node == nullptr || (node == root() && empty())) {
       return node_stats(0, 0);
     }
-    if (node->leaf()) {
+    if (node->is_leaf()) {
       return node_stats(1, 0);
     }
     node_stats res(0, 1);
@@ -1564,15 +1716,14 @@ class btree {
     return res;
   }
 
-  // We use compressed tuple in order to save space because key_compare and
-  // allocator_type are usually empty.
-  absl::container_internal::CompressedTuple<key_compare, allocator_type,
-                                            node_type *>
-      root_;
+  node_type *root_;
 
   // A pointer to the rightmost node. Note that the leftmost node is stored as
-  // the root's parent.
-  node_type *rightmost_;
+  // the root's parent. We use compressed tuple in order to save space because
+  // key_compare and allocator_type are usually empty.
+  absl::container_internal::CompressedTuple<key_compare, allocator_type,
+                                            node_type *>
+      rightmost_;
 
   // Number of values.
   size_type size_;
@@ -1582,9 +1733,9 @@ class btree {
 // btree_node methods
 template <typename P>
 template <typename... Args>
-inline void btree_node<P>::emplace_value(const size_type i,
+inline void btree_node<P>::emplace_value(const field_type i,
                                          allocator_type *alloc,
-                                         Args &&... args) {
+                                         Args &&...args) {
   assert(i >= start());
   assert(i <= finish());
   // Shift old values to create space for new value and then construct it in
@@ -1593,11 +1744,11 @@ inline void btree_node<P>::emplace_value(const size_type i,
     transfer_n_backward(finish() - i, /*dest_i=*/i + 1, /*src_i=*/i, this,
                         alloc);
   }
-  value_init(i, alloc, std::forward<Args>(args)...);
+  value_init(static_cast<field_type>(i), alloc, std::forward<Args>(args)...);
   set_finish(finish() + 1);
 
-  if (!leaf() && finish() > i + 1) {
-    for (int j = finish(); j > i + 1; --j) {
+  if (is_internal() && finish() > i + 1) {
+    for (field_type j = finish(); j > i + 1; --j) {
       set_child(j, child(j - 1));
     }
     clear_child(i + 1);
@@ -1614,13 +1765,13 @@ inline void btree_node<P>::remove_values(const field_type i,
   const field_type src_i = i + to_erase;
   transfer_n(orig_finish - src_i, i, src_i, this, alloc);
 
-  if (!leaf()) {
+  if (is_internal()) {
     // Delete all children between begin and end.
-    for (int j = 0; j < to_erase; ++j) {
+    for (field_type j = 0; j < to_erase; ++j) {
       clear_and_delete(child(i + j + 1), alloc);
     }
     // Rotate children after end into new positions.
-    for (int j = i + to_erase + 1; j <= orig_finish; ++j) {
+    for (field_type j = i + to_erase + 1; j <= orig_finish; ++j) {
       set_child(j - to_erase, child(j));
       clear_child(j);
     }
@@ -1629,7 +1780,7 @@ inline void btree_node<P>::remove_values(const field_type i,
 }
 
 template <typename P>
-void btree_node<P>::rebalance_right_to_left(const int to_move,
+void btree_node<P>::rebalance_right_to_left(field_type to_move,
                                             btree_node *right,
                                             allocator_type *alloc) {
   assert(parent() == right->parent());
@@ -1651,12 +1802,12 @@ void btree_node<P>::rebalance_right_to_left(const int to_move,
   right->transfer_n(right->count() - to_move, right->start(),
                     right->start() + to_move, right, alloc);
 
-  if (!leaf()) {
+  if (is_internal()) {
     // Move the child pointers from the right to the left node.
-    for (int i = 0; i < to_move; ++i) {
+    for (field_type i = 0; i < to_move; ++i) {
       init_child(finish() + i + 1, right->child(i));
     }
-    for (int i = right->start(); i <= right->finish() - to_move; ++i) {
+    for (field_type i = right->start(); i <= right->finish() - to_move; ++i) {
       assert(i + to_move <= right->max_count());
       right->init_child(i, right->child(i + to_move));
       right->clear_child(i + to_move);
@@ -1669,7 +1820,7 @@ void btree_node<P>::rebalance_right_to_left(const int to_move,
 }
 
 template <typename P>
-void btree_node<P>::rebalance_left_to_right(const int to_move,
+void btree_node<P>::rebalance_left_to_right(field_type to_move,
                                             btree_node *right,
                                             allocator_type *alloc) {
   assert(parent() == right->parent());
@@ -1698,13 +1849,13 @@ void btree_node<P>::rebalance_left_to_right(const int to_move,
   // 4) Move the new delimiting value to the parent from the left node.
   parent()->transfer(position(), finish() - to_move, this, alloc);
 
-  if (!leaf()) {
+  if (is_internal()) {
     // Move the child pointers from the left to the right node.
-    for (int i = right->finish(); i >= right->start(); --i) {
-      right->init_child(i + to_move, right->child(i));
-      right->clear_child(i);
+    for (field_type i = right->finish() + 1; i > right->start(); --i) {
+      right->init_child(i - 1 + to_move, right->child(i - 1));
+      right->clear_child(i - 1);
     }
-    for (int i = 1; i <= to_move; ++i) {
+    for (field_type i = 1; i <= to_move; ++i) {
       right->init_child(i - 1, child(finish() - to_move + i));
       clear_child(finish() - to_move + i);
     }
@@ -1744,8 +1895,8 @@ void btree_node<P>::split(const int insert_position, btree_node *dest,
   value_destroy(finish(), alloc);
   parent()->init_child(position() + 1, dest);
 
-  if (!leaf()) {
-    for (int i = dest->start(), j = finish() + 1; i <= dest->finish();
+  if (is_internal()) {
+    for (field_type i = dest->start(), j = finish() + 1; i <= dest->finish();
          ++i, ++j) {
       assert(child(j) != nullptr);
       dest->init_child(i, child(j));
@@ -1765,9 +1916,10 @@ void btree_node<P>::merge(btree_node *src, allocator_type *alloc) {
   // Move the values from the right to the left node.
   transfer_n(src->count(), finish() + 1, src->start(), src, alloc);
 
-  if (!leaf()) {
+  if (is_internal()) {
     // Move the child pointers from the right to the left node.
-    for (int i = src->start(), j = finish() + 1; i <= src->finish(); ++i, ++j) {
+    for (field_type i = src->start(), j = finish() + 1; i <= src->finish();
+         ++i, ++j) {
       init_child(j, src->child(i));
       src->clear_child(i);
     }
@@ -1783,7 +1935,7 @@ void btree_node<P>::merge(btree_node *src, allocator_type *alloc) {
 
 template <typename P>
 void btree_node<P>::clear_and_delete(btree_node *node, allocator_type *alloc) {
-  if (node->leaf()) {
+  if (node->is_leaf()) {
     node->value_destroy_n(node->start(), node->count(), alloc);
     deallocate(LeafSize(node->max_count()), node, alloc);
     return;
@@ -1797,24 +1949,35 @@ void btree_node<P>::clear_and_delete(btree_node *node, allocator_type *alloc) {
   btree_node *delete_root_parent = node->parent();
 
   // Navigate to the leftmost leaf under node, and then delete upwards.
-  while (!node->leaf()) node = node->start_child();
-  // Use `int` because `pos` needs to be able to hold `kNodeSlots+1`, which
-  // isn't guaranteed to be a valid `field_type`.
-  int pos = node->position();
+  while (node->is_internal()) node = node->start_child();
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+  // When generations are enabled, we delete the leftmost leaf last in case it's
+  // the parent of the root and we need to check whether it's a leaf before we
+  // can update the root's generation.
+  // TODO(ezb): if we change btree_node::is_root to check a bool inside the node
+  // instead of checking whether the parent is a leaf, we can remove this logic.
+  btree_node *leftmost_leaf = node;
+#endif
+  // Use `size_type` because `pos` needs to be able to hold `kNodeSlots+1`,
+  // which isn't guaranteed to be a valid `field_type`.
+  size_type pos = node->position();
   btree_node *parent = node->parent();
   for (;;) {
     // In each iteration of the next loop, we delete one leaf node and go right.
     assert(pos <= parent->finish());
     do {
-      node = parent->child(pos);
-      if (!node->leaf()) {
+      node = parent->child(static_cast<field_type>(pos));
+      if (node->is_internal()) {
         // Navigate to the leftmost leaf under node.
-        while (!node->leaf()) node = node->start_child();
+        while (node->is_internal()) node = node->start_child();
         pos = node->position();
         parent = node->parent();
       }
       node->value_destroy_n(node->start(), node->count(), alloc);
-      deallocate(LeafSize(node->max_count()), node, alloc);
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+      if (leftmost_leaf != node)
+#endif
+        deallocate(LeafSize(node->max_count()), node, alloc);
       ++pos;
     } while (pos <= parent->finish());
 
@@ -1826,7 +1989,12 @@ void btree_node<P>::clear_and_delete(btree_node *node, allocator_type *alloc) {
       parent = node->parent();
       node->value_destroy_n(node->start(), node->count(), alloc);
       deallocate(InternalSize(), node, alloc);
-      if (parent == delete_root_parent) return;
+      if (parent == delete_root_parent) {
+#ifdef ABSL_BTREE_ENABLE_GENERATIONS
+        deallocate(LeafSize(leftmost_leaf->max_count()), leftmost_leaf, alloc);
+#endif
+        return;
+      }
       ++pos;
     } while (pos > parent->finish());
   }
@@ -1834,51 +2002,109 @@ void btree_node<P>::clear_and_delete(btree_node *node, allocator_type *alloc) {
 
 ////
 // btree_iterator methods
+
+// Note: the implementation here is based on btree_node::clear_and_delete.
+template <typename N, typename R, typename P>
+auto btree_iterator<N, R, P>::distance_slow(const_iterator other) const
+    -> difference_type {
+  const_iterator begin = other;
+  const_iterator end = *this;
+  assert(begin.node_ != end.node_ || !begin.node_->is_leaf() ||
+         begin.position_ != end.position_);
+
+  const node_type *node = begin.node_;
+  // We need to compensate for double counting if begin.node_ is a leaf node.
+  difference_type count = node->is_leaf() ? -begin.position_ : 0;
+
+  // First navigate to the leftmost leaf node past begin.
+  if (node->is_internal()) {
+    ++count;
+    node = node->child(begin.position_ + 1);
+  }
+  while (node->is_internal()) node = node->start_child();
+
+  // Use `size_type` because `pos` needs to be able to hold `kNodeSlots+1`,
+  // which isn't guaranteed to be a valid `field_type`.
+  size_type pos = node->position();
+  const node_type *parent = node->parent();
+  for (;;) {
+    // In each iteration of the next loop, we count one leaf node and go right.
+    assert(pos <= parent->finish());
+    do {
+      node = parent->child(static_cast<field_type>(pos));
+      if (node->is_internal()) {
+        // Navigate to the leftmost leaf under node.
+        while (node->is_internal()) node = node->start_child();
+        pos = node->position();
+        parent = node->parent();
+      }
+      if (node == end.node_) return count + end.position_;
+      if (parent == end.node_ && pos == static_cast<size_type>(end.position_))
+        return count + node->count();
+      // +1 is for the next internal node value.
+      count += node->count() + 1;
+      ++pos;
+    } while (pos <= parent->finish());
+
+    // Once we've counted all children of parent, go up/right.
+    assert(pos > parent->finish());
+    do {
+      node = parent;
+      pos = node->position();
+      parent = node->parent();
+      // -1 because we counted the value at end and shouldn't.
+      if (parent == end.node_ && pos == static_cast<size_type>(end.position_))
+        return count - 1;
+      ++pos;
+    } while (pos > parent->finish());
+  }
+}
+
 template <typename N, typename R, typename P>
 void btree_iterator<N, R, P>::increment_slow() {
-  if (node->leaf()) {
-    assert(position >= node->finish());
+  if (node_->is_leaf()) {
+    assert(position_ >= node_->finish());
     btree_iterator save(*this);
-    while (position == node->finish() && !node->is_root()) {
-      assert(node->parent()->child(node->position()) == node);
-      position = node->position();
-      node = node->parent();
+    while (position_ == node_->finish() && !node_->is_root()) {
+      assert(node_->parent()->child(node_->position()) == node_);
+      position_ = node_->position();
+      node_ = node_->parent();
     }
     // TODO(ezb): assert we aren't incrementing end() instead of handling.
-    if (position == node->finish()) {
+    if (position_ == node_->finish()) {
       *this = save;
     }
   } else {
-    assert(position < node->finish());
-    node = node->child(position + 1);
-    while (!node->leaf()) {
-      node = node->start_child();
+    assert(position_ < node_->finish());
+    node_ = node_->child(static_cast<field_type>(position_ + 1));
+    while (node_->is_internal()) {
+      node_ = node_->start_child();
     }
-    position = node->start();
+    position_ = node_->start();
   }
 }
 
 template <typename N, typename R, typename P>
 void btree_iterator<N, R, P>::decrement_slow() {
-  if (node->leaf()) {
-    assert(position <= -1);
+  if (node_->is_leaf()) {
+    assert(position_ <= -1);
     btree_iterator save(*this);
-    while (position < node->start() && !node->is_root()) {
-      assert(node->parent()->child(node->position()) == node);
-      position = node->position() - 1;
-      node = node->parent();
+    while (position_ < node_->start() && !node_->is_root()) {
+      assert(node_->parent()->child(node_->position()) == node_);
+      position_ = node_->position() - 1;
+      node_ = node_->parent();
     }
     // TODO(ezb): assert we aren't decrementing begin() instead of handling.
-    if (position < node->start()) {
+    if (position_ < node_->start()) {
       *this = save;
     }
   } else {
-    assert(position >= node->start());
-    node = node->child(position);
-    while (!node->leaf()) {
-      node = node->child(node->finish());
+    assert(position_ >= node_->start());
+    node_ = node_->child(static_cast<field_type>(position_));
+    while (node_->is_internal()) {
+      node_ = node_->child(node_->finish());
     }
-    position = node->finish() - 1;
+    position_ = node_->finish() - 1;
   }
 }
 
@@ -1896,12 +2122,12 @@ void btree<P>::copy_or_move_values_in_order(Btree &other) {
   // values is the same order we'll store them in.
   auto iter = other.begin();
   if (iter == other.end()) return;
-  insert_multi(maybe_move_from_iterator(iter));
+  insert_multi(iter.slot());
   ++iter;
   for (; iter != other.end(); ++iter) {
     // If the btree is not empty, we can just insert the new value at the end
     // of the tree.
-    internal_emplace(end(), maybe_move_from_iterator(iter));
+    internal_emplace(end(), iter.slot());
   }
 }
 
@@ -1921,15 +2147,12 @@ constexpr bool btree<P>::static_assert_validation() {
       "target node size too large");
 
   // Verify that key_compare returns an absl::{weak,strong}_ordering or bool.
-  using compare_result_type =
-      absl::result_of_t<key_compare(key_type, key_type)>;
   static_assert(
-      std::is_same<compare_result_type, bool>::value ||
-          std::is_convertible<compare_result_type, absl::weak_ordering>::value,
+      compare_has_valid_result_type<key_compare, key_type>(),
       "key comparison function must return absl::{weak,strong}_ordering or "
       "bool.");
 
-  // Test the assumption made in setting kNodeValueSpace.
+  // Test the assumption made in setting kNodeSlotSpace.
   static_assert(node_type::MinimumOverhead() >= sizeof(void *) + 4,
                 "node space assumption incorrect");
 
@@ -1980,10 +2203,10 @@ auto btree<P>::equal_range(const K &key) -> std::pair<iterator, iterator> {
 
 template <typename P>
 template <typename K, typename... Args>
-auto btree<P>::insert_unique(const K &key, Args &&... args)
+auto btree<P>::insert_unique(const K &key, Args &&...args)
     -> std::pair<iterator, bool> {
   if (empty()) {
-    mutable_root() = rightmost_ = new_leaf_root_node(1);
+    mutable_root() = mutable_rightmost() = new_leaf_root_node(1);
   }
 
   SearchResult<iterator, is_key_compare_to::value> res = internal_locate(key);
@@ -1996,7 +2219,7 @@ auto btree<P>::insert_unique(const K &key, Args &&... args)
     }
   } else {
     iterator last = internal_last(iter);
-    if (last.node && !compare_keys(key, last.key())) {
+    if (last.node_ && !compare_keys(key, last.key())) {
       // The key already exists in the tree, do nothing.
       return {last, false};
     }
@@ -2007,7 +2230,7 @@ auto btree<P>::insert_unique(const K &key, Args &&... args)
 template <typename P>
 template <typename K, typename... Args>
 inline auto btree<P>::insert_hint_unique(iterator position, const K &key,
-                                         Args &&... args)
+                                         Args &&...args)
     -> std::pair<iterator, bool> {
   if (!empty()) {
     if (position == end() || compare_keys(key, position.key())) {
@@ -2041,8 +2264,11 @@ template <typename P>
 template <typename InputIterator>
 void btree<P>::insert_iterator_unique(InputIterator b, InputIterator e, char) {
   for (; b != e; ++b) {
-    init_type value(*b);
-    insert_hint_unique(end(), params_type::key(value), std::move(value));
+    // Use a node handle to manage a temp slot.
+    auto node_handle =
+        CommonAccess::Construct<node_handle_type>(get_allocator(), *b);
+    slot_type *slot = CommonAccess::GetSlot(node_handle);
+    insert_hint_unique(end(), params_type::key(slot), slot);
   }
 }
 
@@ -2050,11 +2276,11 @@ template <typename P>
 template <typename ValueType>
 auto btree<P>::insert_multi(const key_type &key, ValueType &&v) -> iterator {
   if (empty()) {
-    mutable_root() = rightmost_ = new_leaf_root_node(1);
+    mutable_root() = mutable_rightmost() = new_leaf_root_node(1);
   }
 
   iterator iter = internal_upper_bound(key);
-  if (iter.node == nullptr) {
+  if (iter.node_ == nullptr) {
     iter = end();
   }
   return internal_emplace(iter, std::forward<ValueType>(v));
@@ -2114,15 +2340,15 @@ auto btree<P>::operator=(btree &&other) noexcept -> btree & {
     using std::swap;
     if (absl::allocator_traits<
             allocator_type>::propagate_on_container_copy_assignment::value) {
-      // Note: `root_` also contains the allocator and the key comparator.
       swap(root_, other.root_);
+      // Note: `rightmost_` also contains the allocator and the key comparator.
       swap(rightmost_, other.rightmost_);
       swap(size_, other.size_);
     } else {
       if (allocator() == other.allocator()) {
         swap(mutable_root(), other.mutable_root());
         swap(*mutable_key_comp(), *other.mutable_key_comp());
-        swap(rightmost_, other.rightmost_);
+        swap(mutable_rightmost(), other.mutable_rightmost());
         swap(size_, other.size_);
       } else {
         // We aren't allowed to propagate the allocator and the allocator is
@@ -2140,22 +2366,34 @@ auto btree<P>::operator=(btree &&other) noexcept -> btree & {
 
 template <typename P>
 auto btree<P>::erase(iterator iter) -> iterator {
-  bool internal_delete = false;
-  if (!iter.node->leaf()) {
-    // Deletion of a value on an internal node. First, move the largest value
-    // from our left child here, then delete that position (in remove_values()
-    // below). We can get to the largest value from our left child by
-    // decrementing iter.
+  iter.node_->value_destroy(static_cast<field_type>(iter.position_),
+                            mutable_allocator());
+  iter.update_generation();
+
+  const bool internal_delete = iter.node_->is_internal();
+  if (internal_delete) {
+    // Deletion of a value on an internal node. First, transfer the largest
+    // value from our left child here, then erase/rebalance from that position.
+    // We can get to the largest value from our left child by decrementing iter.
     iterator internal_iter(iter);
     --iter;
-    assert(iter.node->leaf());
-    params_type::move(mutable_allocator(), iter.node->slot(iter.position),
-                      internal_iter.node->slot(internal_iter.position));
-    internal_delete = true;
-  }
-
-  // Delete the key from the leaf.
-  iter.node->remove_values(iter.position, /*to_erase=*/1, mutable_allocator());
+    assert(iter.node_->is_leaf());
+    internal_iter.node_->transfer(
+        static_cast<size_type>(internal_iter.position_),
+        static_cast<size_type>(iter.position_), iter.node_,
+        mutable_allocator());
+  } else {
+    // Shift values after erased position in leaf. In the internal case, we
+    // don't need to do this because the leaf position is the end of the node.
+    const field_type transfer_from =
+        static_cast<field_type>(iter.position_ + 1);
+    const field_type num_to_transfer = iter.node_->finish() - transfer_from;
+    iter.node_->transfer_n(num_to_transfer,
+                           static_cast<size_type>(iter.position_),
+                           transfer_from, iter.node_, mutable_allocator());
+  }
+  // Update node finish and container size.
+  iter.node_->set_finish(iter.node_->finish() - 1);
   --size_;
 
   // We want to return the next value after the one we just erased. If we
@@ -2163,7 +2401,7 @@ auto btree<P>::erase(iterator iter) -> iterator {
   // value is ++(++iter). If we erased from a leaf node (internal_delete ==
   // false) then the next value is ++iter. Note that ++iter may point to an
   // internal node and the value in the internal node may move to a leaf node
-  // (iter.node) when rebalancing is performed at the leaf level.
+  // (iter.node_) when rebalancing is performed at the leaf level.
 
   iterator res = rebalance_after_delete(iter);
 
@@ -2180,14 +2418,14 @@ auto btree<P>::rebalance_after_delete(iterator iter) -> iterator {
   iterator res(iter);
   bool first_iteration = true;
   for (;;) {
-    if (iter.node == root()) {
+    if (iter.node_ == root()) {
       try_shrink();
       if (empty()) {
         return end();
       }
       break;
     }
-    if (iter.node->count() >= kMinNodeValues) {
+    if (iter.node_->count() >= kMinNodeValues) {
       break;
     }
     bool merged = try_merge_or_rebalance(&iter);
@@ -2200,14 +2438,15 @@ auto btree<P>::rebalance_after_delete(iterator iter) -> iterator {
     if (!merged) {
       break;
     }
-    iter.position = iter.node->position();
-    iter.node = iter.node->parent();
+    iter.position_ = iter.node_->position();
+    iter.node_ = iter.node_->parent();
   }
+  res.update_generation();
 
   // Adjust our return value. If we're pointing at the end of a node, advance
   // the iterator.
-  if (res.position == res.node->finish()) {
-    res.position = res.node->finish() - 1;
+  if (res.position_ == res.node_->finish()) {
+    res.position_ = res.node_->finish() - 1;
     ++res;
   }
 
@@ -2217,40 +2456,45 @@ auto btree<P>::rebalance_after_delete(iterator iter) -> iterator {
 template <typename P>
 auto btree<P>::erase_range(iterator begin, iterator end)
     -> std::pair<size_type, iterator> {
-  difference_type count = std::distance(begin, end);
+  size_type count = static_cast<size_type>(end - begin);
   assert(count >= 0);
 
   if (count == 0) {
     return {0, begin};
   }
 
-  if (count == size_) {
+  if (static_cast<size_type>(count) == size_) {
     clear();
     return {count, this->end()};
   }
 
-  if (begin.node == end.node) {
-    assert(end.position > begin.position);
-    begin.node->remove_values(begin.position, end.position - begin.position,
-                              mutable_allocator());
+  if (begin.node_ == end.node_) {
+    assert(end.position_ > begin.position_);
+    begin.node_->remove_values(
+        static_cast<field_type>(begin.position_),
+        static_cast<field_type>(end.position_ - begin.position_),
+        mutable_allocator());
     size_ -= count;
     return {count, rebalance_after_delete(begin)};
   }
 
   const size_type target_size = size_ - count;
   while (size_ > target_size) {
-    if (begin.node->leaf()) {
+    if (begin.node_->is_leaf()) {
       const size_type remaining_to_erase = size_ - target_size;
-      const size_type remaining_in_node = begin.node->finish() - begin.position;
-      const size_type to_erase =
-          (std::min)(remaining_to_erase, remaining_in_node);
-      begin.node->remove_values(begin.position, to_erase, mutable_allocator());
+      const size_type remaining_in_node =
+          static_cast<size_type>(begin.node_->finish() - begin.position_);
+      const field_type to_erase = static_cast<field_type>(
+          (std::min)(remaining_to_erase, remaining_in_node));
+      begin.node_->remove_values(static_cast<field_type>(begin.position_),
+                                 to_erase, mutable_allocator());
       size_ -= to_erase;
       begin = rebalance_after_delete(begin);
     } else {
       begin = erase(begin);
     }
   }
+  begin.update_generation();
   return {count, begin};
 }
 
@@ -2259,8 +2503,7 @@ void btree<P>::clear() {
   if (!empty()) {
     node_type::clear_and_delete(root(), mutable_allocator());
   }
-  mutable_root() = EmptyNode();
-  rightmost_ = EmptyNode();
+  mutable_root() = mutable_rightmost() = EmptyNode();
   size_ = 0;
 }
 
@@ -2269,15 +2512,15 @@ void btree<P>::swap(btree &other) {
   using std::swap;
   if (absl::allocator_traits<
           allocator_type>::propagate_on_container_swap::value) {
-    // Note: `root_` also contains the allocator and the key comparator.
-    swap(root_, other.root_);
+    // Note: `rightmost_` also contains the allocator and the key comparator.
+    swap(rightmost_, other.rightmost_);
   } else {
     // It's undefined behavior if the allocators are unequal here.
     assert(allocator() == other.allocator());
-    swap(mutable_root(), other.mutable_root());
+    swap(mutable_rightmost(), other.mutable_rightmost());
     swap(*mutable_key_comp(), *other.mutable_key_comp());
   }
-  swap(rightmost_, other.rightmost_);
+  swap(mutable_root(), other.mutable_root());
   swap(size_, other.size_);
 }
 
@@ -2285,18 +2528,18 @@ template <typename P>
 void btree<P>::verify() const {
   assert(root() != nullptr);
   assert(leftmost() != nullptr);
-  assert(rightmost_ != nullptr);
+  assert(rightmost() != nullptr);
   assert(empty() || size() == internal_verify(root(), nullptr, nullptr));
-  assert(leftmost() == (++const_iterator(root(), -1)).node);
-  assert(rightmost_ == (--const_iterator(root(), root()->finish())).node);
-  assert(leftmost()->leaf());
-  assert(rightmost_->leaf());
+  assert(leftmost() == (++const_iterator(root(), -1)).node_);
+  assert(rightmost() == (--const_iterator(root(), root()->finish())).node_);
+  assert(leftmost()->is_leaf());
+  assert(rightmost()->is_leaf());
 }
 
 template <typename P>
 void btree<P>::rebalance_or_split(iterator *iter) {
-  node_type *&node = iter->node;
-  int &insert_position = iter->position;
+  node_type *&node = iter->node_;
+  int &insert_position = iter->position_;
   assert(node->count() == node->max_count());
   assert(kNodeSlots == node->max_count());
 
@@ -2311,16 +2554,19 @@ void btree<P>::rebalance_or_split(iterator *iter) {
         // We bias rebalancing based on the position being inserted. If we're
         // inserting at the end of the right node then we bias rebalancing to
         // fill up the left node.
-        int to_move = (kNodeSlots - left->count()) /
-                      (1 + (insert_position < static_cast<int>(kNodeSlots)));
-        to_move = (std::max)(1, to_move);
-
-        if (insert_position - to_move >= node->start() ||
-            left->count() + to_move < static_cast<int>(kNodeSlots)) {
+        field_type to_move =
+            (kNodeSlots - left->count()) /
+            (1 + (static_cast<field_type>(insert_position) < kNodeSlots));
+        to_move = (std::max)(field_type{1}, to_move);
+
+        if (static_cast<field_type>(insert_position) - to_move >=
+                node->start() ||
+            left->count() + to_move < kNodeSlots) {
           left->rebalance_right_to_left(to_move, node, mutable_allocator());
 
           assert(node->max_count() - node->count() == to_move);
-          insert_position = insert_position - to_move;
+          insert_position = static_cast<int>(
+              static_cast<field_type>(insert_position) - to_move);
           if (insert_position < node->start()) {
             insert_position = insert_position + left->count() + 1;
             node = left;
@@ -2340,12 +2586,13 @@ void btree<P>::rebalance_or_split(iterator *iter) {
         // We bias rebalancing based on the position being inserted. If we're
         // inserting at the beginning of the left node then we bias rebalancing
         // to fill up the right node.
-        int to_move = (static_cast<int>(kNodeSlots) - right->count()) /
-                      (1 + (insert_position > node->start()));
-        to_move = (std::max)(1, to_move);
+        field_type to_move = (kNodeSlots - right->count()) /
+                             (1 + (insert_position > node->start()));
+        to_move = (std::max)(field_type{1}, to_move);
 
-        if (insert_position <= node->finish() - to_move ||
-            right->count() + to_move < static_cast<int>(kNodeSlots)) {
+        if (static_cast<field_type>(insert_position) <=
+                node->finish() - to_move ||
+            right->count() + to_move < kNodeSlots) {
           node->rebalance_left_to_right(to_move, right, mutable_allocator());
 
           if (insert_position > node->finish()) {
@@ -2371,19 +2618,20 @@ void btree<P>::rebalance_or_split(iterator *iter) {
     // Create a new root node and set the current root node as the child of the
     // new root.
     parent = new_internal_node(parent);
+    parent->set_generation(root()->generation());
     parent->init_child(parent->start(), root());
     mutable_root() = parent;
     // If the former root was a leaf node, then it's now the rightmost node.
-    assert(!parent->start_child()->leaf() ||
-           parent->start_child() == rightmost_);
+    assert(parent->start_child()->is_internal() ||
+           parent->start_child() == rightmost());
   }
 
   // Split the node.
   node_type *split_node;
-  if (node->leaf()) {
+  if (node->is_leaf()) {
     split_node = new_leaf_node(parent);
     node->split(insert_position, split_node, mutable_allocator());
-    if (rightmost_ == node) rightmost_ = split_node;
+    if (rightmost() == node) mutable_rightmost() = split_node;
   } else {
     split_node = new_internal_node(parent);
     node->split(insert_position, split_node, mutable_allocator());
@@ -2398,55 +2646,57 @@ void btree<P>::rebalance_or_split(iterator *iter) {
 template <typename P>
 void btree<P>::merge_nodes(node_type *left, node_type *right) {
   left->merge(right, mutable_allocator());
-  if (rightmost_ == right) rightmost_ = left;
+  if (rightmost() == right) mutable_rightmost() = left;
 }
 
 template <typename P>
 bool btree<P>::try_merge_or_rebalance(iterator *iter) {
-  node_type *parent = iter->node->parent();
-  if (iter->node->position() > parent->start()) {
+  node_type *parent = iter->node_->parent();
+  if (iter->node_->position() > parent->start()) {
     // Try merging with our left sibling.
-    node_type *left = parent->child(iter->node->position() - 1);
+    node_type *left = parent->child(iter->node_->position() - 1);
     assert(left->max_count() == kNodeSlots);
-    if (1U + left->count() + iter->node->count() <= kNodeSlots) {
-      iter->position += 1 + left->count();
-      merge_nodes(left, iter->node);
-      iter->node = left;
+    if (1U + left->count() + iter->node_->count() <= kNodeSlots) {
+      iter->position_ += 1 + left->count();
+      merge_nodes(left, iter->node_);
+      iter->node_ = left;
       return true;
     }
   }
-  if (iter->node->position() < parent->finish()) {
+  if (iter->node_->position() < parent->finish()) {
     // Try merging with our right sibling.
-    node_type *right = parent->child(iter->node->position() + 1);
+    node_type *right = parent->child(iter->node_->position() + 1);
     assert(right->max_count() == kNodeSlots);
-    if (1U + iter->node->count() + right->count() <= kNodeSlots) {
-      merge_nodes(iter->node, right);
+    if (1U + iter->node_->count() + right->count() <= kNodeSlots) {
+      merge_nodes(iter->node_, right);
       return true;
     }
     // Try rebalancing with our right sibling. We don't perform rebalancing if
-    // we deleted the first element from iter->node and the node is not
+    // we deleted the first element from iter->node_ and the node is not
     // empty. This is a small optimization for the common pattern of deleting
     // from the front of the tree.
     if (right->count() > kMinNodeValues &&
-        (iter->node->count() == 0 || iter->position > iter->node->start())) {
-      int to_move = (right->count() - iter->node->count()) / 2;
-      to_move = (std::min)(to_move, right->count() - 1);
-      iter->node->rebalance_right_to_left(to_move, right, mutable_allocator());
+        (iter->node_->count() == 0 || iter->position_ > iter->node_->start())) {
+      field_type to_move = (right->count() - iter->node_->count()) / 2;
+      to_move =
+          (std::min)(to_move, static_cast<field_type>(right->count() - 1));
+      iter->node_->rebalance_right_to_left(to_move, right, mutable_allocator());
       return false;
     }
   }
-  if (iter->node->position() > parent->start()) {
+  if (iter->node_->position() > parent->start()) {
     // Try rebalancing with our left sibling. We don't perform rebalancing if
-    // we deleted the last element from iter->node and the node is not
+    // we deleted the last element from iter->node_ and the node is not
     // empty. This is a small optimization for the common pattern of deleting
     // from the back of the tree.
-    node_type *left = parent->child(iter->node->position() - 1);
+    node_type *left = parent->child(iter->node_->position() - 1);
     if (left->count() > kMinNodeValues &&
-        (iter->node->count() == 0 || iter->position < iter->node->finish())) {
-      int to_move = (left->count() - iter->node->count()) / 2;
-      to_move = (std::min)(to_move, left->count() - 1);
-      left->rebalance_left_to_right(to_move, iter->node, mutable_allocator());
-      iter->position += to_move;
+        (iter->node_->count() == 0 ||
+         iter->position_ < iter->node_->finish())) {
+      field_type to_move = (left->count() - iter->node_->count()) / 2;
+      to_move = (std::min)(to_move, static_cast<field_type>(left->count() - 1));
+      left->rebalance_left_to_right(to_move, iter->node_, mutable_allocator());
+      iter->position_ += to_move;
       return false;
     }
   }
@@ -2460,9 +2710,9 @@ void btree<P>::try_shrink() {
     return;
   }
   // Deleted the last item on the root node, shrink the height of the tree.
-  if (orig_root->leaf()) {
+  if (orig_root->is_leaf()) {
     assert(size() == 0);
-    mutable_root() = rightmost_ = EmptyNode();
+    mutable_root() = mutable_rightmost() = EmptyNode();
   } else {
     node_type *child = orig_root->start_child();
     child->make_root();
@@ -2474,53 +2724,57 @@ void btree<P>::try_shrink() {
 template <typename P>
 template <typename IterType>
 inline IterType btree<P>::internal_last(IterType iter) {
-  assert(iter.node != nullptr);
-  while (iter.position == iter.node->finish()) {
-    iter.position = iter.node->position();
-    iter.node = iter.node->parent();
-    if (iter.node->leaf()) {
-      iter.node = nullptr;
+  assert(iter.node_ != nullptr);
+  while (iter.position_ == iter.node_->finish()) {
+    iter.position_ = iter.node_->position();
+    iter.node_ = iter.node_->parent();
+    if (iter.node_->is_leaf()) {
+      iter.node_ = nullptr;
       break;
     }
   }
+  iter.update_generation();
   return iter;
 }
 
 template <typename P>
 template <typename... Args>
-inline auto btree<P>::internal_emplace(iterator iter, Args &&... args)
+inline auto btree<P>::internal_emplace(iterator iter, Args &&...args)
     -> iterator {
-  if (!iter.node->leaf()) {
+  if (iter.node_->is_internal()) {
     // We can't insert on an internal node. Instead, we'll insert after the
     // previous value which is guaranteed to be on a leaf node.
     --iter;
-    ++iter.position;
+    ++iter.position_;
   }
-  const field_type max_count = iter.node->max_count();
+  const field_type max_count = iter.node_->max_count();
   allocator_type *alloc = mutable_allocator();
-  if (iter.node->count() == max_count) {
+  if (iter.node_->count() == max_count) {
     // Make room in the leaf for the new item.
     if (max_count < kNodeSlots) {
       // Insertion into the root where the root is smaller than the full node
       // size. Simply grow the size of the root node.
-      assert(iter.node == root());
-      iter.node =
-          new_leaf_root_node((std::min<int>)(kNodeSlots, 2 * max_count));
+      assert(iter.node_ == root());
+      iter.node_ = new_leaf_root_node(static_cast<field_type>(
+          (std::min)(static_cast<int>(kNodeSlots), 2 * max_count)));
       // Transfer the values from the old root to the new root.
       node_type *old_root = root();
-      node_type *new_root = iter.node;
+      node_type *new_root = iter.node_;
       new_root->transfer_n(old_root->count(), new_root->start(),
                            old_root->start(), old_root, alloc);
       new_root->set_finish(old_root->finish());
       old_root->set_finish(old_root->start());
+      new_root->set_generation(old_root->generation());
       node_type::clear_and_delete(old_root, alloc);
-      mutable_root() = rightmost_ = new_root;
+      mutable_root() = mutable_rightmost() = new_root;
     } else {
       rebalance_or_split(&iter);
     }
   }
-  iter.node->emplace_value(iter.position, alloc, std::forward<Args>(args)...);
+  iter.node_->emplace_value(static_cast<field_type>(iter.position_), alloc,
+                            std::forward<Args>(args)...);
   ++size_;
+  iter.update_generation();
   return iter;
 }
 
@@ -2530,9 +2784,9 @@ inline auto btree<P>::internal_locate(const K &key) const
     -> SearchResult<iterator, is_key_compare_to::value> {
   iterator iter(const_cast<node_type *>(root()));
   for (;;) {
-    SearchResult<int, is_key_compare_to::value> res =
-        iter.node->lower_bound(key, key_comp());
-    iter.position = res.value;
+    SearchResult<size_type, is_key_compare_to::value> res =
+        iter.node_->lower_bound(key, key_comp());
+    iter.position_ = static_cast<int>(res.value);
     if (res.IsEq()) {
       return {iter, MatchKind::kEq};
     }
@@ -2540,10 +2794,10 @@ inline auto btree<P>::internal_locate(const K &key) const
     // down the tree if the keys are equal, but determining equality would
     // require doing an extra comparison on each node on the way down, and we
     // will need to go all the way to the leaf node in the expected case.
-    if (iter.node->leaf()) {
+    if (iter.node_->is_leaf()) {
       break;
     }
-    iter.node = iter.node->child(iter.position);
+    iter.node_ = iter.node_->child(static_cast<field_type>(iter.position_));
   }
   // Note: in the non-key-compare-to case, the key may actually be equivalent
   // here (and the MatchKind::kNe is ignored).
@@ -2560,16 +2814,16 @@ auto btree<P>::internal_lower_bound(const K &key) const
     return ret;
   }
   iterator iter(const_cast<node_type *>(root()));
-  SearchResult<int, is_key_compare_to::value> res;
+  SearchResult<size_type, is_key_compare_to::value> res;
   bool seen_eq = false;
   for (;;) {
-    res = iter.node->lower_bound(key, key_comp());
-    iter.position = res.value;
-    if (iter.node->leaf()) {
+    res = iter.node_->lower_bound(key, key_comp());
+    iter.position_ = static_cast<int>(res.value);
+    if (iter.node_->is_leaf()) {
       break;
     }
     seen_eq = seen_eq || res.IsEq();
-    iter.node = iter.node->child(iter.position);
+    iter.node_ = iter.node_->child(static_cast<field_type>(iter.position_));
   }
   if (res.IsEq()) return {iter, MatchKind::kEq};
   return {internal_last(iter), seen_eq ? MatchKind::kEq : MatchKind::kNe};
@@ -2580,11 +2834,11 @@ template <typename K>
 auto btree<P>::internal_upper_bound(const K &key) const -> iterator {
   iterator iter(const_cast<node_type *>(root()));
   for (;;) {
-    iter.position = iter.node->upper_bound(key, key_comp());
-    if (iter.node->leaf()) {
+    iter.position_ = static_cast<int>(iter.node_->upper_bound(key, key_comp()));
+    if (iter.node_->is_leaf()) {
       break;
     }
-    iter.node = iter.node->child(iter.position);
+    iter.node_ = iter.node_->child(static_cast<field_type>(iter.position_));
   }
   return internal_last(iter);
 }
@@ -2599,7 +2853,7 @@ auto btree<P>::internal_find(const K &key) const -> iterator {
     }
   } else {
     const iterator iter = internal_last(res.value);
-    if (iter.node != nullptr && !compare_keys(key, iter.key())) {
+    if (iter.node_ != nullptr && !compare_keys(key, iter.key())) {
       return iter;
     }
   }
@@ -2607,8 +2861,8 @@ auto btree<P>::internal_find(const K &key) const -> iterator {
 }
 
 template <typename P>
-int btree<P>::internal_verify(const node_type *node, const key_type *lo,
-                              const key_type *hi) const {
+typename btree<P>::size_type btree<P>::internal_verify(
+    const node_type *node, const key_type *lo, const key_type *hi) const {
   assert(node->count() > 0);
   assert(node->count() <= node->max_count());
   if (lo) {
@@ -2620,9 +2874,9 @@ int btree<P>::internal_verify(const node_type *node, const key_type *lo,
   for (int i = node->start() + 1; i < node->finish(); ++i) {
     assert(!compare_keys(node->key(i), node->key(i - 1)));
   }
-  int count = node->count();
-  if (!node->leaf()) {
-    for (int i = node->start(); i <= node->finish(); ++i) {
+  size_type count = node->count();
+  if (node->is_internal()) {
+    for (field_type i = node->start(); i <= node->finish(); ++i) {
       assert(node->child(i) != nullptr);
       assert(node->child(i)->parent() == node);
       assert(node->child(i)->position() == i);
@@ -2634,6 +2888,50 @@ int btree<P>::internal_verify(const node_type *node, const key_type *lo,
   return count;
 }
 
+struct btree_access {
+  template <typename BtreeContainer, typename Pred>
+  static auto erase_if(BtreeContainer &container, Pred pred) ->
+      typename BtreeContainer::size_type {
+    const auto initial_size = container.size();
+    auto &tree = container.tree_;
+    auto *alloc = tree.mutable_allocator();
+    for (auto it = container.begin(); it != container.end();) {
+      if (!pred(*it)) {
+        ++it;
+        continue;
+      }
+      auto *node = it.node_;
+      if (node->is_internal()) {
+        // Handle internal nodes normally.
+        it = container.erase(it);
+        continue;
+      }
+      // If this is a leaf node, then we do all the erases from this node
+      // at once before doing rebalancing.
+
+      // The current position to transfer slots to.
+      int to_pos = it.position_;
+      node->value_destroy(it.position_, alloc);
+      while (++it.position_ < node->finish()) {
+        it.update_generation();
+        if (pred(*it)) {
+          node->value_destroy(it.position_, alloc);
+        } else {
+          node->transfer(node->slot(to_pos++), node->slot(it.position_), alloc);
+        }
+      }
+      const int num_deleted = node->finish() - to_pos;
+      tree.size_ -= num_deleted;
+      node->set_finish(to_pos);
+      it.position_ = to_pos;
+      it = tree.rebalance_after_delete(it);
+    }
+    return initial_size - container.size();
+  }
+};
+
+#undef ABSL_BTREE_ENABLE_GENERATIONS
+
 }  // namespace container_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/container/internal/btree_container.h b/third_party/abseil-cpp/absl/container/internal/btree_container.h
index a99668c713..3e259861a5 100644
--- a/third_party/abseil-cpp/absl/container/internal/btree_container.h
+++ b/third_party/abseil-cpp/absl/container/internal/btree_container.h
@@ -44,8 +44,8 @@ class btree_container {
   // transparent case.
   template <class K>
   using key_arg =
-      typename KeyArg<IsTransparent<typename Tree::key_compare>::value>::
-          template type<K, typename Tree::key_type>;
+      typename KeyArg<params_type::kIsKeyCompareTransparent>::template type<
+          K, typename Tree::key_type>;
 
  public:
   using key_type = typename Tree::key_type;
@@ -107,7 +107,7 @@ class btree_container {
   template <typename K = key_type>
   size_type count(const key_arg<K> &key) const {
     auto equal_range = this->equal_range(key);
-    return std::distance(equal_range.first, equal_range.second);
+    return equal_range.second - equal_range.first;
   }
   template <typename K = key_type>
   iterator find(const key_arg<K> &key) {
@@ -166,9 +166,10 @@ class btree_container {
 
   // Extract routines.
   node_type extract(iterator position) {
-    // Use Move instead of Transfer, because the rebalancing code expects to
-    // have a valid object to scribble metadata bits on top of.
-    auto node = CommonAccess::Move<node_type>(get_allocator(), position.slot());
+    // Use Construct instead of Transfer because the rebalancing code will
+    // destroy the slot later.
+    auto node =
+        CommonAccess::Construct<node_type>(get_allocator(), position.slot());
     erase(position);
     return node;
   }
@@ -228,6 +229,7 @@ class btree_container {
   }
 
  protected:
+  friend struct btree_access;
   Tree tree_;
 };
 
@@ -290,8 +292,11 @@ class btree_set_container : public btree_container<Tree> {
   }
   template <typename... Args>
   std::pair<iterator, bool> emplace(Args &&... args) {
-    init_type v(std::forward<Args>(args)...);
-    return this->tree_.insert_unique(params_type::key(v), std::move(v));
+    // Use a node handle to manage a temp slot.
+    auto node = CommonAccess::Construct<node_type>(this->get_allocator(),
+                                                   std::forward<Args>(args)...);
+    auto *slot = CommonAccess::GetSlot(node);
+    return this->tree_.insert_unique(params_type::key(slot), slot);
   }
   iterator insert(const_iterator hint, const value_type &v) {
     return this->tree_
@@ -305,9 +310,12 @@ class btree_set_container : public btree_container<Tree> {
   }
   template <typename... Args>
   iterator emplace_hint(const_iterator hint, Args &&... args) {
-    init_type v(std::forward<Args>(args)...);
+    // Use a node handle to manage a temp slot.
+    auto node = CommonAccess::Construct<node_type>(this->get_allocator(),
+                                                   std::forward<Args>(args)...);
+    auto *slot = CommonAccess::GetSlot(node);
     return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), std::move(v))
+        .insert_hint_unique(iterator(hint), params_type::key(slot), slot)
         .first;
   }
   template <typename InputIterator>
@@ -536,6 +544,7 @@ class btree_multiset_container : public btree_container<Tree> {
   using params_type = typename Tree::params_type;
   using init_type = typename params_type::init_type;
   using is_key_compare_to = typename params_type::is_key_compare_to;
+  friend class BtreeNodePeer;
 
   template <class K>
   using key_arg = typename super_type::template key_arg<K>;
@@ -596,12 +605,18 @@ class btree_multiset_container : public btree_container<Tree> {
   }
   template <typename... Args>
   iterator emplace(Args &&... args) {
-    return this->tree_.insert_multi(init_type(std::forward<Args>(args)...));
+    // Use a node handle to manage a temp slot.
+    auto node = CommonAccess::Construct<node_type>(this->get_allocator(),
+                                                   std::forward<Args>(args)...);
+    return this->tree_.insert_multi(CommonAccess::GetSlot(node));
   }
   template <typename... Args>
   iterator emplace_hint(const_iterator hint, Args &&... args) {
-    return this->tree_.insert_hint_multi(
-        iterator(hint), init_type(std::forward<Args>(args)...));
+    // Use a node handle to manage a temp slot.
+    auto node = CommonAccess::Construct<node_type>(this->get_allocator(),
+                                                   std::forward<Args>(args)...);
+    return this->tree_.insert_hint_multi(iterator(hint),
+                                         CommonAccess::GetSlot(node));
   }
   iterator insert(node_type &&node) {
     if (!node) return this->end();
@@ -667,6 +682,7 @@ template <typename Tree>
 class btree_multimap_container : public btree_multiset_container<Tree> {
   using super_type = btree_multiset_container<Tree>;
   using params_type = typename Tree::params_type;
+  friend class BtreeNodePeer;
 
  public:
   using mapped_type = typename params_type::mapped_type;
diff --git a/third_party/abseil-cpp/absl/container/internal/common.h b/third_party/abseil-cpp/absl/container/internal/common.h
index 030e9d4ab0..9239bb4d09 100644
--- a/third_party/abseil-cpp/absl/container/internal/common.h
+++ b/third_party/abseil-cpp/absl/container/internal/common.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_CONTAINER_INTERNAL_CONTAINER_H_
-#define ABSL_CONTAINER_INTERNAL_CONTAINER_H_
+#ifndef ABSL_CONTAINER_INTERNAL_COMMON_H_
+#define ABSL_CONTAINER_INTERNAL_COMMON_H_
 
 #include <cassert>
 #include <type_traits>
@@ -84,10 +84,11 @@ class node_handle_base {
     PolicyTraits::transfer(alloc(), slot(), s);
   }
 
-  struct move_tag_t {};
-  node_handle_base(move_tag_t, const allocator_type& a, slot_type* s)
+  struct construct_tag_t {};
+  template <typename... Args>
+  node_handle_base(construct_tag_t, const allocator_type& a, Args&&... args)
       : alloc_(a) {
-    PolicyTraits::construct(alloc(), slot(), s);
+    PolicyTraits::construct(alloc(), slot(), std::forward<Args>(args)...);
   }
 
   void destroy() {
@@ -186,8 +187,8 @@ struct CommonAccess {
   }
 
   template <typename T, typename... Args>
-  static T Move(Args&&... args) {
-    return T(typename T::move_tag_t{}, std::forward<Args>(args)...);
+  static T Construct(Args&&... args) {
+    return T(typename T::construct_tag_t{}, std::forward<Args>(args)...);
   }
 };
 
@@ -203,4 +204,4 @@ struct InsertReturnType {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_CONTAINER_INTERNAL_CONTAINER_H_
+#endif  // ABSL_CONTAINER_INTERNAL_COMMON_H_
diff --git a/third_party/abseil-cpp/absl/container/internal/common_policy_traits.h b/third_party/abseil-cpp/absl/container/internal/common_policy_traits.h
new file mode 100644
index 0000000000..0fd4866e38
--- /dev/null
+++ b/third_party/abseil-cpp/absl/container/internal/common_policy_traits.h
@@ -0,0 +1,115 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_CONTAINER_INTERNAL_COMMON_POLICY_TRAITS_H_
+#define ABSL_CONTAINER_INTERNAL_COMMON_POLICY_TRAITS_H_
+
+#include <cstddef>
+#include <cstring>
+#include <memory>
+#include <new>
+#include <type_traits>
+#include <utility>
+
+#include "absl/meta/type_traits.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace container_internal {
+
+// Defines how slots are initialized/destroyed/moved.
+template <class Policy, class = void>
+struct common_policy_traits {
+  // The actual object stored in the container.
+  using slot_type = typename Policy::slot_type;
+  using reference = decltype(Policy::element(std::declval<slot_type*>()));
+  using value_type = typename std::remove_reference<reference>::type;
+
+  // PRECONDITION: `slot` is UNINITIALIZED
+  // POSTCONDITION: `slot` is INITIALIZED
+  template <class Alloc, class... Args>
+  static void construct(Alloc* alloc, slot_type* slot, Args&&... args) {
+    Policy::construct(alloc, slot, std::forward<Args>(args)...);
+  }
+
+  // PRECONDITION: `slot` is INITIALIZED
+  // POSTCONDITION: `slot` is UNINITIALIZED
+  template <class Alloc>
+  static void destroy(Alloc* alloc, slot_type* slot) {
+    Policy::destroy(alloc, slot);
+  }
+
+  // Transfers the `old_slot` to `new_slot`. Any memory allocated by the
+  // allocator inside `old_slot` to `new_slot` can be transferred.
+  //
+  // OPTIONAL: defaults to:
+  //
+  //     clone(new_slot, std::move(*old_slot));
+  //     destroy(old_slot);
+  //
+  // PRECONDITION: `new_slot` is UNINITIALIZED and `old_slot` is INITIALIZED
+  // POSTCONDITION: `new_slot` is INITIALIZED and `old_slot` is
+  //                UNINITIALIZED
+  template <class Alloc>
+  static void transfer(Alloc* alloc, slot_type* new_slot, slot_type* old_slot) {
+    transfer_impl(alloc, new_slot, old_slot, 0);
+  }
+
+  // PRECONDITION: `slot` is INITIALIZED
+  // POSTCONDITION: `slot` is INITIALIZED
+  // Note: we use remove_const_t so that the two overloads have different args
+  // in the case of sets with explicitly const value_types.
+  template <class P = Policy>
+  static auto element(absl::remove_const_t<slot_type>* slot)
+      -> decltype(P::element(slot)) {
+    return P::element(slot);
+  }
+  template <class P = Policy>
+  static auto element(const slot_type* slot) -> decltype(P::element(slot)) {
+    return P::element(slot);
+  }
+
+ private:
+  // Use auto -> decltype as an enabler.
+  template <class Alloc, class P = Policy>
+  static auto transfer_impl(Alloc* alloc, slot_type* new_slot,
+                            slot_type* old_slot, int)
+      -> decltype((void)P::transfer(alloc, new_slot, old_slot)) {
+    P::transfer(alloc, new_slot, old_slot);
+  }
+  template <class Alloc>
+  static void transfer_impl(Alloc* alloc, slot_type* new_slot,
+                            slot_type* old_slot, char) {
+#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
+    if (absl::is_trivially_relocatable<value_type>()) {
+      // TODO(b/247130232,b/251814870): remove casts after fixing warnings.
+      std::memcpy(static_cast<void*>(
+                      std::launder(const_cast<std::remove_const_t<value_type>*>(
+                          &element(new_slot)))),
+                  static_cast<const void*>(&element(old_slot)),
+                  sizeof(value_type));
+      return;
+    }
+#endif
+
+    construct(alloc, new_slot, std::move(element(old_slot)));
+    destroy(alloc, old_slot);
+  }
+};
+
+}  // namespace container_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_CONTAINER_INTERNAL_COMMON_POLICY_TRAITS_H_
diff --git a/third_party/abseil-cpp/absl/container/internal/common_policy_traits_test.cc b/third_party/abseil-cpp/absl/container/internal/common_policy_traits_test.cc
new file mode 100644
index 0000000000..5eaa4aae00
--- /dev/null
+++ b/third_party/abseil-cpp/absl/container/internal/common_policy_traits_test.cc
@@ -0,0 +1,120 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/container/internal/common_policy_traits.h"
+
+#include <functional>
+#include <memory>
+#include <new>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace container_internal {
+namespace {
+
+using ::testing::MockFunction;
+using ::testing::AnyNumber;
+using ::testing::ReturnRef;
+
+using Slot = int;
+
+struct PolicyWithoutOptionalOps {
+  using slot_type = Slot;
+  using key_type = Slot;
+  using init_type = Slot;
+
+  static std::function<void(void*, Slot*, Slot)> construct;
+  static std::function<void(void*, Slot*)> destroy;
+
+  static std::function<Slot&(Slot*)> element;
+};
+
+std::function<void(void*, Slot*, Slot)> PolicyWithoutOptionalOps::construct;
+std::function<void(void*, Slot*)> PolicyWithoutOptionalOps::destroy;
+
+std::function<Slot&(Slot*)> PolicyWithoutOptionalOps::element;
+
+struct PolicyWithOptionalOps : PolicyWithoutOptionalOps {
+  static std::function<void(void*, Slot*, Slot*)> transfer;
+};
+
+std::function<void(void*, Slot*, Slot*)> PolicyWithOptionalOps::transfer;
+
+struct Test : ::testing::Test {
+  Test() {
+    PolicyWithoutOptionalOps::construct = [&](void* a1, Slot* a2, Slot a3) {
+      construct.Call(a1, a2, std::move(a3));
+    };
+    PolicyWithoutOptionalOps::destroy = [&](void* a1, Slot* a2) {
+      destroy.Call(a1, a2);
+    };
+
+    PolicyWithoutOptionalOps::element = [&](Slot* a1) -> Slot& {
+      return element.Call(a1);
+    };
+
+    PolicyWithOptionalOps::transfer = [&](void* a1, Slot* a2, Slot* a3) {
+      return transfer.Call(a1, a2, a3);
+    };
+  }
+
+  std::allocator<Slot> alloc;
+  int a = 53;
+
+  MockFunction<void(void*, Slot*, Slot)> construct;
+  MockFunction<void(void*, Slot*)> destroy;
+
+  MockFunction<Slot&(Slot*)> element;
+
+  MockFunction<void(void*, Slot*, Slot*)> transfer;
+};
+
+TEST_F(Test, construct) {
+  EXPECT_CALL(construct, Call(&alloc, &a, 53));
+  common_policy_traits<PolicyWithoutOptionalOps>::construct(&alloc, &a, 53);
+}
+
+TEST_F(Test, destroy) {
+  EXPECT_CALL(destroy, Call(&alloc, &a));
+  common_policy_traits<PolicyWithoutOptionalOps>::destroy(&alloc, &a);
+}
+
+TEST_F(Test, element) {
+  int b = 0;
+  EXPECT_CALL(element, Call(&a)).WillOnce(ReturnRef(b));
+  EXPECT_EQ(&b, &common_policy_traits<PolicyWithoutOptionalOps>::element(&a));
+}
+
+TEST_F(Test, without_transfer) {
+  int b = 42;
+  EXPECT_CALL(element, Call(&a)).Times(AnyNumber()).WillOnce(ReturnRef(a));
+  EXPECT_CALL(element, Call(&b)).WillOnce(ReturnRef(b));
+  EXPECT_CALL(construct, Call(&alloc, &a, b)).Times(AnyNumber());
+  EXPECT_CALL(destroy, Call(&alloc, &b)).Times(AnyNumber());
+  common_policy_traits<PolicyWithoutOptionalOps>::transfer(&alloc, &a, &b);
+}
+
+TEST_F(Test, with_transfer) {
+  int b = 42;
+  EXPECT_CALL(transfer, Call(&alloc, &a, &b));
+  common_policy_traits<PolicyWithOptionalOps>::transfer(&alloc, &a, &b);
+}
+
+}  // namespace
+}  // namespace container_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/container/internal/compressed_tuple_test.cc b/third_party/abseil-cpp/absl/container/internal/compressed_tuple_test.cc
index 62a7483ee3..74111f975e 100644
--- a/third_party/abseil-cpp/absl/container/internal/compressed_tuple_test.cc
+++ b/third_party/abseil-cpp/absl/container/internal/compressed_tuple_test.cc
@@ -403,6 +403,16 @@ TEST(CompressedTupleTest, EmptyFinalClass) {
 }
 #endif
 
+// TODO(b/214288561): enable this test.
+TEST(CompressedTupleTest, DISABLED_NestedEbo) {
+  struct Empty1 {};
+  struct Empty2 {};
+  CompressedTuple<Empty1, CompressedTuple<Empty2>, int> x;
+  CompressedTuple<Empty1, Empty2, int> y;
+  // Currently fails with sizeof(x) == 8, sizeof(y) == 4.
+  EXPECT_EQ(sizeof(x), sizeof(y));
+}
+
 }  // namespace
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/internal/container_memory.h b/third_party/abseil-cpp/absl/container/internal/container_memory.h
index e67529ecb6..bfa4ff93d7 100644
--- a/third_party/abseil-cpp/absl/container/internal/container_memory.h
+++ b/third_party/abseil-cpp/absl/container/internal/container_memory.h
@@ -17,6 +17,7 @@
 
 #include <cassert>
 #include <cstddef>
+#include <cstring>
 #include <memory>
 #include <new>
 #include <tuple>
@@ -174,7 +175,7 @@ decltype(std::declval<F>()(std::declval<T>())) WithConstructed(
 //
 // 2. auto a = PairArgs(args...);
 //    std::pair<F, S> p(std::piecewise_construct,
-//                      std::move(p.first), std::move(p.second));
+//                      std::move(a.first), std::move(a.second));
 inline std::pair<std::tuple<>, std::tuple<>> PairArgs() { return {}; }
 template <class F, class S>
 std::pair<std::tuple<F&&>, std::tuple<S&&>> PairArgs(F&& f, S&& s) {
@@ -340,7 +341,8 @@ template <class K, class V>
 struct map_slot_policy {
   using slot_type = map_slot_type<K, V>;
   using value_type = std::pair<const K, V>;
-  using mutable_value_type = std::pair<K, V>;
+  using mutable_value_type =
+      std::pair<absl::remove_const_t<K>, absl::remove_const_t<V>>;
 
  private:
   static void emplace(slot_type* slot) {
@@ -402,6 +404,15 @@ struct map_slot_policy {
     }
   }
 
+  // Construct this slot by copying from another slot.
+  template <class Allocator>
+  static void construct(Allocator* alloc, slot_type* slot,
+                        const slot_type* other) {
+    emplace(slot);
+    absl::allocator_traits<Allocator>::construct(*alloc, &slot->value,
+                                                 other->value);
+  }
+
   template <class Allocator>
   static void destroy(Allocator* alloc, slot_type* slot) {
     if (kMutableKeys::value) {
@@ -415,6 +426,16 @@ struct map_slot_policy {
   static void transfer(Allocator* alloc, slot_type* new_slot,
                        slot_type* old_slot) {
     emplace(new_slot);
+#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
+    if (absl::is_trivially_relocatable<value_type>()) {
+      // TODO(b/247130232,b/251814870): remove casts after fixing warnings.
+      std::memcpy(static_cast<void*>(std::launder(&new_slot->value)),
+                  static_cast<const void*>(&old_slot->value),
+                  sizeof(value_type));
+      return;
+    }
+#endif
+
     if (kMutableKeys::value) {
       absl::allocator_traits<Allocator>::construct(
           *alloc, &new_slot->mutable_value, std::move(old_slot->mutable_value));
@@ -424,33 +445,6 @@ struct map_slot_policy {
     }
     destroy(alloc, old_slot);
   }
-
-  template <class Allocator>
-  static void swap(Allocator* alloc, slot_type* a, slot_type* b) {
-    if (kMutableKeys::value) {
-      using std::swap;
-      swap(a->mutable_value, b->mutable_value);
-    } else {
-      value_type tmp = std::move(a->value);
-      absl::allocator_traits<Allocator>::destroy(*alloc, &a->value);
-      absl::allocator_traits<Allocator>::construct(*alloc, &a->value,
-                                                   std::move(b->value));
-      absl::allocator_traits<Allocator>::destroy(*alloc, &b->value);
-      absl::allocator_traits<Allocator>::construct(*alloc, &b->value,
-                                                   std::move(tmp));
-    }
-  }
-
-  template <class Allocator>
-  static void move(Allocator* alloc, slot_type* src, slot_type* dest) {
-    if (kMutableKeys::value) {
-      dest->mutable_value = std::move(src->mutable_value);
-    } else {
-      absl::allocator_traits<Allocator>::destroy(*alloc, &dest->value);
-      absl::allocator_traits<Allocator>::construct(*alloc, &dest->value,
-                                                   std::move(src->value));
-    }
-  }
 };
 
 }  // namespace container_internal
diff --git a/third_party/abseil-cpp/absl/container/internal/counting_allocator.h b/third_party/abseil-cpp/absl/container/internal/counting_allocator.h
index 927cf08255..66068a5a0d 100644
--- a/third_party/abseil-cpp/absl/container/internal/counting_allocator.h
+++ b/third_party/abseil-cpp/absl/container/internal/counting_allocator.h
@@ -80,7 +80,15 @@ class CountingAllocator {
   template <typename U>
   void destroy(U* p) {
     Allocator allocator;
+    // Ignore GCC warning bug.
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wuse-after-free"
+#endif
     AllocatorTraits::destroy(allocator, p);
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic pop
+#endif
     if (instance_count_ != nullptr) {
       *instance_count_ -= 1;
     }
diff --git a/third_party/abseil-cpp/absl/container/internal/hash_function_defaults_test.cc b/third_party/abseil-cpp/absl/container/internal/hash_function_defaults_test.cc
index 59576b8ede..9f0a4c72ca 100644
--- a/third_party/abseil-cpp/absl/container/internal/hash_function_defaults_test.cc
+++ b/third_party/abseil-cpp/absl/container/internal/hash_function_defaults_test.cc
@@ -310,7 +310,7 @@ struct StringLikeTest : public ::testing::Test {
   hash_default_hash<typename T::first_type> hash;
 };
 
-TYPED_TEST_CASE_P(StringLikeTest);
+TYPED_TEST_SUITE_P(StringLikeTest);
 
 TYPED_TEST_P(StringLikeTest, Eq) {
   EXPECT_TRUE(this->eq(this->a1, this->b1));
diff --git a/third_party/abseil-cpp/absl/container/internal/hash_policy_traits.h b/third_party/abseil-cpp/absl/container/internal/hash_policy_traits.h
index 46c97b18a2..164ec12316 100644
--- a/third_party/abseil-cpp/absl/container/internal/hash_policy_traits.h
+++ b/third_party/abseil-cpp/absl/container/internal/hash_policy_traits.h
@@ -21,6 +21,7 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/container/internal/common_policy_traits.h"
 #include "absl/meta/type_traits.h"
 
 namespace absl {
@@ -29,7 +30,7 @@ namespace container_internal {
 
 // Defines how slots are initialized/destroyed/moved.
 template <class Policy, class = void>
-struct hash_policy_traits {
+struct hash_policy_traits : common_policy_traits<Policy> {
   // The type of the keys stored in the hashtable.
   using key_type = typename Policy::key_type;
 
@@ -87,43 +88,6 @@ struct hash_policy_traits {
   // Defaults to false if not provided by the policy.
   using constant_iterators = ConstantIteratorsImpl<>;
 
-  // PRECONDITION: `slot` is UNINITIALIZED
-  // POSTCONDITION: `slot` is INITIALIZED
-  template <class Alloc, class... Args>
-  static void construct(Alloc* alloc, slot_type* slot, Args&&... args) {
-    Policy::construct(alloc, slot, std::forward<Args>(args)...);
-  }
-
-  // PRECONDITION: `slot` is INITIALIZED
-  // POSTCONDITION: `slot` is UNINITIALIZED
-  template <class Alloc>
-  static void destroy(Alloc* alloc, slot_type* slot) {
-    Policy::destroy(alloc, slot);
-  }
-
-  // Transfers the `old_slot` to `new_slot`. Any memory allocated by the
-  // allocator inside `old_slot` to `new_slot` can be transferred.
-  //
-  // OPTIONAL: defaults to:
-  //
-  //     clone(new_slot, std::move(*old_slot));
-  //     destroy(old_slot);
-  //
-  // PRECONDITION: `new_slot` is UNINITIALIZED and `old_slot` is INITIALIZED
-  // POSTCONDITION: `new_slot` is INITIALIZED and `old_slot` is
-  //                UNINITIALIZED
-  template <class Alloc>
-  static void transfer(Alloc* alloc, slot_type* new_slot, slot_type* old_slot) {
-    transfer_impl(alloc, new_slot, old_slot, 0);
-  }
-
-  // PRECONDITION: `slot` is INITIALIZED
-  // POSTCONDITION: `slot` is INITIALIZED
-  template <class P = Policy>
-  static auto element(slot_type* slot) -> decltype(P::element(slot)) {
-    return P::element(slot);
-  }
-
   // Returns the amount of memory owned by `slot`, exclusive of `sizeof(*slot)`.
   //
   // If `slot` is nullptr, returns the constant amount of memory owned by any
@@ -174,8 +138,8 @@ struct hash_policy_traits {
   // Used for node handle manipulation.
   template <class P = Policy>
   static auto mutable_key(slot_type* slot)
-      -> decltype(P::apply(ReturnKey(), element(slot))) {
-    return P::apply(ReturnKey(), element(slot));
+      -> decltype(P::apply(ReturnKey(), hash_policy_traits::element(slot))) {
+    return P::apply(ReturnKey(), hash_policy_traits::element(slot));
   }
 
   // Returns the "value" (as opposed to the "key") portion of the element. Used
@@ -184,21 +148,6 @@ struct hash_policy_traits {
   static auto value(T* elem) -> decltype(P::value(elem)) {
     return P::value(elem);
   }
-
- private:
-  // Use auto -> decltype as an enabler.
-  template <class Alloc, class P = Policy>
-  static auto transfer_impl(Alloc* alloc, slot_type* new_slot,
-                            slot_type* old_slot, int)
-      -> decltype((void)P::transfer(alloc, new_slot, old_slot)) {
-    P::transfer(alloc, new_slot, old_slot);
-  }
-  template <class Alloc>
-  static void transfer_impl(Alloc* alloc, slot_type* new_slot,
-                            slot_type* old_slot, char) {
-    construct(alloc, new_slot, std::move(element(old_slot)));
-    destroy(alloc, old_slot);
-  }
 };
 
 }  // namespace container_internal
diff --git a/third_party/abseil-cpp/absl/container/internal/hash_policy_traits_test.cc b/third_party/abseil-cpp/absl/container/internal/hash_policy_traits_test.cc
index 6ef8b9e05f..82d7cc3a70 100644
--- a/third_party/abseil-cpp/absl/container/internal/hash_policy_traits_test.cc
+++ b/third_party/abseil-cpp/absl/container/internal/hash_policy_traits_test.cc
@@ -38,81 +38,31 @@ struct PolicyWithoutOptionalOps {
   using key_type = Slot;
   using init_type = Slot;
 
-  static std::function<void(void*, Slot*, Slot)> construct;
-  static std::function<void(void*, Slot*)> destroy;
-
   static std::function<Slot&(Slot*)> element;
   static int apply(int v) { return apply_impl(v); }
   static std::function<int(int)> apply_impl;
   static std::function<Slot&(Slot*)> value;
 };
 
-std::function<void(void*, Slot*, Slot)> PolicyWithoutOptionalOps::construct;
-std::function<void(void*, Slot*)> PolicyWithoutOptionalOps::destroy;
-
-std::function<Slot&(Slot*)> PolicyWithoutOptionalOps::element;
 std::function<int(int)> PolicyWithoutOptionalOps::apply_impl;
 std::function<Slot&(Slot*)> PolicyWithoutOptionalOps::value;
 
-struct PolicyWithOptionalOps : PolicyWithoutOptionalOps {
-  static std::function<void(void*, Slot*, Slot*)> transfer;
-};
-
-std::function<void(void*, Slot*, Slot*)> PolicyWithOptionalOps::transfer;
-
 struct Test : ::testing::Test {
   Test() {
-    PolicyWithoutOptionalOps::construct = [&](void* a1, Slot* a2, Slot a3) {
-      construct.Call(a1, a2, std::move(a3));
-    };
-    PolicyWithoutOptionalOps::destroy = [&](void* a1, Slot* a2) {
-      destroy.Call(a1, a2);
-    };
-
-    PolicyWithoutOptionalOps::element = [&](Slot* a1) -> Slot& {
-      return element.Call(a1);
-    };
     PolicyWithoutOptionalOps::apply_impl = [&](int a1) -> int {
       return apply.Call(a1);
     };
     PolicyWithoutOptionalOps::value = [&](Slot* a1) -> Slot& {
       return value.Call(a1);
     };
-
-    PolicyWithOptionalOps::transfer = [&](void* a1, Slot* a2, Slot* a3) {
-      return transfer.Call(a1, a2, a3);
-    };
   }
 
   std::allocator<int> alloc;
   int a = 53;
-
-  MockFunction<void(void*, Slot*, Slot)> construct;
-  MockFunction<void(void*, Slot*)> destroy;
-
-  MockFunction<Slot&(Slot*)> element;
   MockFunction<int(int)> apply;
   MockFunction<Slot&(Slot*)> value;
-
-  MockFunction<void(void*, Slot*, Slot*)> transfer;
 };
 
-TEST_F(Test, construct) {
-  EXPECT_CALL(construct, Call(&alloc, &a, 53));
-  hash_policy_traits<PolicyWithoutOptionalOps>::construct(&alloc, &a, 53);
-}
-
-TEST_F(Test, destroy) {
-  EXPECT_CALL(destroy, Call(&alloc, &a));
-  hash_policy_traits<PolicyWithoutOptionalOps>::destroy(&alloc, &a);
-}
-
-TEST_F(Test, element) {
-  int b = 0;
-  EXPECT_CALL(element, Call(&a)).WillOnce(ReturnRef(b));
-  EXPECT_EQ(&b, &hash_policy_traits<PolicyWithoutOptionalOps>::element(&a));
-}
-
 TEST_F(Test, apply) {
   EXPECT_CALL(apply, Call(42)).WillOnce(Return(1337));
   EXPECT_EQ(1337, (hash_policy_traits<PolicyWithoutOptionalOps>::apply(42)));
@@ -124,20 +74,6 @@ TEST_F(Test, value) {
   EXPECT_EQ(&b, &hash_policy_traits<PolicyWithoutOptionalOps>::value(&a));
 }
 
-TEST_F(Test, without_transfer) {
-  int b = 42;
-  EXPECT_CALL(element, Call(&b)).WillOnce(::testing::ReturnRef(b));
-  EXPECT_CALL(construct, Call(&alloc, &a, b));
-  EXPECT_CALL(destroy, Call(&alloc, &b));
-  hash_policy_traits<PolicyWithoutOptionalOps>::transfer(&alloc, &a, &b);
-}
-
-TEST_F(Test, with_transfer) {
-  int b = 42;
-  EXPECT_CALL(transfer, Call(&alloc, &a, &b));
-  hash_policy_traits<PolicyWithOptionalOps>::transfer(&alloc, &a, &b);
-}
-
 }  // namespace
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.cc b/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.cc
index 40cce0479e..5b8cf341da 100644
--- a/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.cc
+++ b/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.cc
@@ -21,33 +21,43 @@
 #include <limits>
 
 #include "absl/base/attributes.h"
-#include "absl/container/internal/have_sse.h"
+#include "absl/base/config.h"
 #include "absl/debugging/stacktrace.h"
 #include "absl/memory/memory.h"
 #include "absl/profiling/internal/exponential_biased.h"
 #include "absl/profiling/internal/sample_recorder.h"
 #include "absl/synchronization/mutex.h"
+#include "absl/utility/utility.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace container_internal {
+
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 constexpr int HashtablezInfo::kMaxStackDepth;
+#endif
 
 namespace {
 ABSL_CONST_INIT std::atomic<bool> g_hashtablez_enabled{
     false
 };
 ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_sample_parameter{1 << 10};
+std::atomic<HashtablezConfigListener> g_hashtablez_config_listener{nullptr};
 
 #if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
 ABSL_PER_THREAD_TLS_KEYWORD absl::profiling_internal::ExponentialBiased
     g_exponential_biased_generator;
 #endif
 
+void TriggerHashtablezConfigListener() {
+  auto* listener = g_hashtablez_config_listener.load(std::memory_order_acquire);
+  if (listener != nullptr) listener();
+}
+
 }  // namespace
 
 #if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample = 0;
+ABSL_PER_THREAD_TLS_KEYWORD SamplingState global_next_sample = {0, 0};
 #endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
 
 HashtablezSampler& GlobalHashtablezSampler() {
@@ -55,13 +65,11 @@ HashtablezSampler& GlobalHashtablezSampler() {
   return *sampler;
 }
 
-// TODO(bradleybear): The comments at this constructors declaration say that the
-// fields are not initialized, but this definition does initialize the fields.
-// Something needs to be cleaned up.
-HashtablezInfo::HashtablezInfo() { PrepareForSampling(); }
+HashtablezInfo::HashtablezInfo() = default;
 HashtablezInfo::~HashtablezInfo() = default;
 
-void HashtablezInfo::PrepareForSampling() {
+void HashtablezInfo::PrepareForSampling(int64_t stride,
+                                        size_t inline_element_size_value) {
   capacity.store(0, std::memory_order_relaxed);
   size.store(0, std::memory_order_relaxed);
   num_erases.store(0, std::memory_order_relaxed);
@@ -74,11 +82,13 @@ void HashtablezInfo::PrepareForSampling() {
   max_reserve.store(0, std::memory_order_relaxed);
 
   create_time = absl::Now();
+  weight = stride;
   // The inliner makes hardcoded skip_count difficult (especially when combined
   // with LTO).  We use the ability to exclude stacks by regex when encoding
   // instead.
   depth = absl::GetStackTrace(stack, HashtablezInfo::kMaxStackDepth,
                               /* skip_count= */ 0);
+  inline_element_size = inline_element_size_value;
 }
 
 static bool ShouldForceSampling() {
@@ -101,23 +111,32 @@ static bool ShouldForceSampling() {
   return state == kForce;
 }
 
-HashtablezInfo* SampleSlow(int64_t* next_sample, size_t inline_element_size) {
+HashtablezInfo* SampleSlow(SamplingState& next_sample,
+                           size_t inline_element_size) {
   if (ABSL_PREDICT_FALSE(ShouldForceSampling())) {
-    *next_sample = 1;
-    HashtablezInfo* result = GlobalHashtablezSampler().Register();
-    result->inline_element_size = inline_element_size;
+    next_sample.next_sample = 1;
+    const int64_t old_stride = exchange(next_sample.sample_stride, 1);
+    HashtablezInfo* result =
+        GlobalHashtablezSampler().Register(old_stride, inline_element_size);
     return result;
   }
 
 #if !defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-  *next_sample = std::numeric_limits<int64_t>::max();
+  next_sample = {
+      std::numeric_limits<int64_t>::max(),
+      std::numeric_limits<int64_t>::max(),
+  };
   return nullptr;
 #else
-  bool first = *next_sample < 0;
-  *next_sample = g_exponential_biased_generator.GetStride(
+  bool first = next_sample.next_sample < 0;
+
+  const int64_t next_stride = g_exponential_biased_generator.GetStride(
       g_hashtablez_sample_parameter.load(std::memory_order_relaxed));
+
+  next_sample.next_sample = next_stride;
+  const int64_t old_stride = exchange(next_sample.sample_stride, next_stride);
   // Small values of interval are equivalent to just sampling next time.
-  ABSL_ASSERT(*next_sample >= 1);
+  ABSL_ASSERT(next_stride >= 1);
 
   // g_hashtablez_enabled can be dynamically flipped, we need to set a threshold
   // low enough that we will start sampling in a reasonable time, so we just use
@@ -127,13 +146,11 @@ HashtablezInfo* SampleSlow(int64_t* next_sample, size_t inline_element_size) {
   // We will only be negative on our first count, so we should just retry in
   // that case.
   if (first) {
-    if (ABSL_PREDICT_TRUE(--*next_sample > 0)) return nullptr;
+    if (ABSL_PREDICT_TRUE(--next_sample.next_sample > 0)) return nullptr;
     return SampleSlow(next_sample, inline_element_size);
   }
 
-  HashtablezInfo* result = GlobalHashtablezSampler().Register();
-  result->inline_element_size = inline_element_size;
-  return result;
+  return GlobalHashtablezSampler().Register(old_stride, inline_element_size);
 #endif
 }
 
@@ -146,7 +163,7 @@ void RecordInsertSlow(HashtablezInfo* info, size_t hash,
   // SwissTables probe in groups of 16, so scale this to count items probes and
   // not offset from desired.
   size_t probe_length = distance_from_desired;
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
+#ifdef ABSL_INTERNAL_HAVE_SSE2
   probe_length /= 16;
 #else
   probe_length /= 8;
@@ -163,11 +180,33 @@ void RecordInsertSlow(HashtablezInfo* info, size_t hash,
   info->size.fetch_add(1, std::memory_order_relaxed);
 }
 
+void SetHashtablezConfigListener(HashtablezConfigListener l) {
+  g_hashtablez_config_listener.store(l, std::memory_order_release);
+}
+
+bool IsHashtablezEnabled() {
+  return g_hashtablez_enabled.load(std::memory_order_acquire);
+}
+
 void SetHashtablezEnabled(bool enabled) {
+  SetHashtablezEnabledInternal(enabled);
+  TriggerHashtablezConfigListener();
+}
+
+void SetHashtablezEnabledInternal(bool enabled) {
   g_hashtablez_enabled.store(enabled, std::memory_order_release);
 }
 
+int32_t GetHashtablezSampleParameter() {
+  return g_hashtablez_sample_parameter.load(std::memory_order_acquire);
+}
+
 void SetHashtablezSampleParameter(int32_t rate) {
+  SetHashtablezSampleParameterInternal(rate);
+  TriggerHashtablezConfigListener();
+}
+
+void SetHashtablezSampleParameterInternal(int32_t rate) {
   if (rate > 0) {
     g_hashtablez_sample_parameter.store(rate, std::memory_order_release);
   } else {
@@ -176,12 +215,20 @@ void SetHashtablezSampleParameter(int32_t rate) {
   }
 }
 
-void SetHashtablezMaxSamples(int32_t max) {
+size_t GetHashtablezMaxSamples() {
+  return GlobalHashtablezSampler().GetMaxSamples();
+}
+
+void SetHashtablezMaxSamples(size_t max) {
+  SetHashtablezMaxSamplesInternal(max);
+  TriggerHashtablezConfigListener();
+}
+
+void SetHashtablezMaxSamplesInternal(size_t max) {
   if (max > 0) {
     GlobalHashtablezSampler().SetMaxSamples(max);
   } else {
-    ABSL_RAW_LOG(ERROR, "Invalid hashtablez max samples: %lld",
-                 static_cast<long long>(max));  // NOLINT(runtime/int)
+    ABSL_RAW_LOG(ERROR, "Invalid hashtablez max samples: 0");
   }
 }
 
diff --git a/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.h b/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.h
index 91fcdb34a3..a89518bb03 100644
--- a/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.h
+++ b/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler.h
@@ -44,9 +44,9 @@
 #include <memory>
 #include <vector>
 
+#include "absl/base/config.h"
 #include "absl/base/internal/per_thread_tls.h"
 #include "absl/base/optimization.h"
-#include "absl/container/internal/have_sse.h"
 #include "absl/profiling/internal/sample_recorder.h"
 #include "absl/synchronization/mutex.h"
 #include "absl/utility/utility.h"
@@ -67,7 +67,8 @@ struct HashtablezInfo : public profiling_internal::Sample<HashtablezInfo> {
 
   // Puts the object into a clean state, fills in the logically `const` members,
   // blocking for any readers that are currently sampling the object.
-  void PrepareForSampling() ABSL_EXCLUSIVE_LOCKS_REQUIRED(init_mu);
+  void PrepareForSampling(int64_t stride, size_t inline_element_size_value)
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(init_mu);
 
   // These fields are mutated by the various Record* APIs and need to be
   // thread-safe.
@@ -84,18 +85,18 @@ struct HashtablezInfo : public profiling_internal::Sample<HashtablezInfo> {
 
   // All of the fields below are set by `PrepareForSampling`, they must not be
   // mutated in `Record*` functions.  They are logically `const` in that sense.
-  // These are guarded by init_mu, but that is not externalized to clients, who
-  // can only read them during `HashtablezSampler::Iterate` which will hold the
-  // lock.
+  // These are guarded by init_mu, but that is not externalized to clients,
+  // which can read them only during `SampleRecorder::Iterate` which will hold
+  // the lock.
   static constexpr int kMaxStackDepth = 64;
   absl::Time create_time;
   int32_t depth;
   void* stack[kMaxStackDepth];
-  size_t inline_element_size;
+  size_t inline_element_size;  // How big is the slot?
 };
 
 inline void RecordRehashSlow(HashtablezInfo* info, size_t total_probe_length) {
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
+#ifdef ABSL_INTERNAL_HAVE_SSE2
   total_probe_length /= 16;
 #else
   total_probe_length /= 8;
@@ -144,7 +145,15 @@ inline void RecordEraseSlow(HashtablezInfo* info) {
       std::memory_order_relaxed);
 }
 
-HashtablezInfo* SampleSlow(int64_t* next_sample, size_t inline_element_size);
+struct SamplingState {
+  int64_t next_sample;
+  // When we make a sampling decision, we record that distance so we can weight
+  // each sample.
+  int64_t sample_stride;
+};
+
+HashtablezInfo* SampleSlow(SamplingState& next_sample,
+                           size_t inline_element_size);
 void UnsampleSlow(HashtablezInfo* info);
 
 #if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
@@ -234,7 +243,7 @@ class HashtablezInfoHandle {
 #endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
 
 #if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-extern ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample;
+extern ABSL_PER_THREAD_TLS_KEYWORD SamplingState global_next_sample;
 #endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
 
 // Returns an RAII sampling handle that manages registration and unregistation
@@ -242,11 +251,11 @@ extern ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample;
 inline HashtablezInfoHandle Sample(
     size_t inline_element_size ABSL_ATTRIBUTE_UNUSED) {
 #if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-  if (ABSL_PREDICT_TRUE(--global_next_sample > 0)) {
+  if (ABSL_PREDICT_TRUE(--global_next_sample.next_sample > 0)) {
     return HashtablezInfoHandle(nullptr);
   }
   return HashtablezInfoHandle(
-      SampleSlow(&global_next_sample, inline_element_size));
+      SampleSlow(global_next_sample, inline_element_size));
 #else
   return HashtablezInfoHandle(nullptr);
 #endif  // !ABSL_PER_THREAD_TLS
@@ -258,14 +267,23 @@ using HashtablezSampler =
 // Returns a global Sampler.
 HashtablezSampler& GlobalHashtablezSampler();
 
+using HashtablezConfigListener = void (*)();
+void SetHashtablezConfigListener(HashtablezConfigListener l);
+
 // Enables or disables sampling for Swiss tables.
+bool IsHashtablezEnabled();
 void SetHashtablezEnabled(bool enabled);
+void SetHashtablezEnabledInternal(bool enabled);
 
 // Sets the rate at which Swiss tables will be sampled.
+int32_t GetHashtablezSampleParameter();
 void SetHashtablezSampleParameter(int32_t rate);
+void SetHashtablezSampleParameterInternal(int32_t rate);
 
 // Sets a soft max for the number of samples that will be kept.
-void SetHashtablezMaxSamples(int32_t max);
+size_t GetHashtablezMaxSamples();
+void SetHashtablezMaxSamples(size_t max);
+void SetHashtablezMaxSamplesInternal(size_t max);
 
 // Configuration override.
 // This allows process-wide sampling without depending on order of
diff --git a/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler_test.cc b/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler_test.cc
index 449619a32c..665d518fc7 100644
--- a/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler_test.cc
+++ b/third_party/abseil-cpp/absl/container/internal/hashtablez_sampler_test.cc
@@ -21,7 +21,7 @@
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/base/attributes.h"
-#include "absl/container/internal/have_sse.h"
+#include "absl/base/config.h"
 #include "absl/profiling/internal/sample_recorder.h"
 #include "absl/synchronization/blocking_counter.h"
 #include "absl/synchronization/internal/thread_pool.h"
@@ -30,7 +30,7 @@
 #include "absl/time/clock.h"
 #include "absl/time/time.h"
 
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
+#ifdef ABSL_INTERNAL_HAVE_SSE2
 constexpr int kProbeLength = 16;
 #else
 constexpr int kProbeLength = 8;
@@ -70,7 +70,9 @@ std::vector<size_t> GetSizes(HashtablezSampler* s) {
 }
 
 HashtablezInfo* Register(HashtablezSampler* s, size_t size) {
-  auto* info = s->Register();
+  const int64_t test_stride = 123;
+  const size_t test_element_size = 17;
+  auto* info = s->Register(test_stride, test_element_size);
   assert(info != nullptr);
   info->size.store(size);
   return info;
@@ -78,12 +80,12 @@ HashtablezInfo* Register(HashtablezSampler* s, size_t size) {
 
 TEST(HashtablezInfoTest, PrepareForSampling) {
   absl::Time test_start = absl::Now();
+  const int64_t test_stride = 123;
   const size_t test_element_size = 17;
   HashtablezInfo info;
   absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
+  info.PrepareForSampling(test_stride, test_element_size);
 
-  info.inline_element_size = test_element_size;
   EXPECT_EQ(info.capacity.load(), 0);
   EXPECT_EQ(info.size.load(), 0);
   EXPECT_EQ(info.num_erases.load(), 0);
@@ -95,6 +97,7 @@ TEST(HashtablezInfoTest, PrepareForSampling) {
   EXPECT_EQ(info.hashes_bitwise_xor.load(), 0);
   EXPECT_EQ(info.max_reserve.load(), 0);
   EXPECT_GE(info.create_time, test_start);
+  EXPECT_EQ(info.weight, test_stride);
   EXPECT_EQ(info.inline_element_size, test_element_size);
 
   info.capacity.store(1, std::memory_order_relaxed);
@@ -108,7 +111,7 @@ TEST(HashtablezInfoTest, PrepareForSampling) {
   info.max_reserve.store(1, std::memory_order_relaxed);
   info.create_time = test_start - absl::Hours(20);
 
-  info.PrepareForSampling();
+  info.PrepareForSampling(test_stride * 2, test_element_size);
   EXPECT_EQ(info.capacity.load(), 0);
   EXPECT_EQ(info.size.load(), 0);
   EXPECT_EQ(info.num_erases.load(), 0);
@@ -119,6 +122,7 @@ TEST(HashtablezInfoTest, PrepareForSampling) {
   EXPECT_EQ(info.hashes_bitwise_and.load(), ~size_t{});
   EXPECT_EQ(info.hashes_bitwise_xor.load(), 0);
   EXPECT_EQ(info.max_reserve.load(), 0);
+  EXPECT_EQ(info.weight, 2 * test_stride);
   EXPECT_EQ(info.inline_element_size, test_element_size);
   EXPECT_GE(info.create_time, test_start);
 }
@@ -126,7 +130,9 @@ TEST(HashtablezInfoTest, PrepareForSampling) {
 TEST(HashtablezInfoTest, RecordStorageChanged) {
   HashtablezInfo info;
   absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
+  const int64_t test_stride = 21;
+  const size_t test_element_size = 19;
+  info.PrepareForSampling(test_stride, test_element_size);
   RecordStorageChangedSlow(&info, 17, 47);
   EXPECT_EQ(info.size.load(), 17);
   EXPECT_EQ(info.capacity.load(), 47);
@@ -138,7 +144,9 @@ TEST(HashtablezInfoTest, RecordStorageChanged) {
 TEST(HashtablezInfoTest, RecordInsert) {
   HashtablezInfo info;
   absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
+  const int64_t test_stride = 25;
+  const size_t test_element_size = 23;
+  info.PrepareForSampling(test_stride, test_element_size);
   EXPECT_EQ(info.max_probe_length.load(), 0);
   RecordInsertSlow(&info, 0x0000FF00, 6 * kProbeLength);
   EXPECT_EQ(info.max_probe_length.load(), 6);
@@ -158,11 +166,11 @@ TEST(HashtablezInfoTest, RecordInsert) {
 }
 
 TEST(HashtablezInfoTest, RecordErase) {
+  const int64_t test_stride = 31;
   const size_t test_element_size = 29;
   HashtablezInfo info;
   absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-  info.inline_element_size = test_element_size;
+  info.PrepareForSampling(test_stride, test_element_size);
   EXPECT_EQ(info.num_erases.load(), 0);
   EXPECT_EQ(info.size.load(), 0);
   RecordInsertSlow(&info, 0x0000FF00, 6 * kProbeLength);
@@ -174,11 +182,11 @@ TEST(HashtablezInfoTest, RecordErase) {
 }
 
 TEST(HashtablezInfoTest, RecordRehash) {
+  const int64_t test_stride = 33;
   const size_t test_element_size = 31;
   HashtablezInfo info;
   absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-  info.inline_element_size = test_element_size;
+  info.PrepareForSampling(test_stride, test_element_size);
   RecordInsertSlow(&info, 0x1, 0);
   RecordInsertSlow(&info, 0x2, kProbeLength);
   RecordInsertSlow(&info, 0x4, kProbeLength);
@@ -203,7 +211,9 @@ TEST(HashtablezInfoTest, RecordRehash) {
 TEST(HashtablezInfoTest, RecordReservation) {
   HashtablezInfo info;
   absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
+  const int64_t test_stride = 35;
+  const size_t test_element_size = 33;
+  info.PrepareForSampling(test_stride, test_element_size);
   RecordReservationSlow(&info, 3);
   EXPECT_EQ(info.max_reserve.load(), 3);
 
@@ -223,9 +233,10 @@ TEST(HashtablezSamplerTest, SmallSampleParameter) {
   SetHashtablezSampleParameter(100);
 
   for (int i = 0; i < 1000; ++i) {
-    int64_t next_sample = 0;
-    HashtablezInfo* sample = SampleSlow(&next_sample, test_element_size);
-    EXPECT_GT(next_sample, 0);
+    SamplingState next_sample = {0, 0};
+    HashtablezInfo* sample = SampleSlow(next_sample, test_element_size);
+    EXPECT_GT(next_sample.next_sample, 0);
+    EXPECT_EQ(next_sample.next_sample, next_sample.sample_stride);
     EXPECT_NE(sample, nullptr);
     UnsampleSlow(sample);
   }
@@ -237,9 +248,10 @@ TEST(HashtablezSamplerTest, LargeSampleParameter) {
   SetHashtablezSampleParameter(std::numeric_limits<int32_t>::max());
 
   for (int i = 0; i < 1000; ++i) {
-    int64_t next_sample = 0;
-    HashtablezInfo* sample = SampleSlow(&next_sample, test_element_size);
-    EXPECT_GT(next_sample, 0);
+    SamplingState next_sample = {0, 0};
+    HashtablezInfo* sample = SampleSlow(next_sample, test_element_size);
+    EXPECT_GT(next_sample.next_sample, 0);
+    EXPECT_EQ(next_sample.next_sample, next_sample.sample_stride);
     EXPECT_NE(sample, nullptr);
     UnsampleSlow(sample);
   }
@@ -266,13 +278,16 @@ TEST(HashtablezSamplerTest, Sample) {
 
 TEST(HashtablezSamplerTest, Handle) {
   auto& sampler = GlobalHashtablezSampler();
-  HashtablezInfoHandle h(sampler.Register());
+  const int64_t test_stride = 41;
+  const size_t test_element_size = 39;
+  HashtablezInfoHandle h(sampler.Register(test_stride, test_element_size));
   auto* info = HashtablezInfoHandlePeer::GetInfo(&h);
   info->hashes_bitwise_and.store(0x12345678, std::memory_order_relaxed);
 
   bool found = false;
   sampler.Iterate([&](const HashtablezInfo& h) {
     if (&h == info) {
+      EXPECT_EQ(h.weight, test_stride);
       EXPECT_EQ(h.hashes_bitwise_and.load(), 0x12345678);
       found = true;
     }
@@ -338,18 +353,20 @@ TEST(HashtablezSamplerTest, MultiThreaded) {
   ThreadPool pool(10);
 
   for (int i = 0; i < 10; ++i) {
-    pool.Schedule([&sampler, &stop]() {
+    const int64_t sampling_stride = 11 + i % 3;
+    const size_t elt_size = 10 + i % 2;
+    pool.Schedule([&sampler, &stop, sampling_stride, elt_size]() {
       std::random_device rd;
       std::mt19937 gen(rd());
 
       std::vector<HashtablezInfo*> infoz;
       while (!stop.HasBeenNotified()) {
         if (infoz.empty()) {
-          infoz.push_back(sampler.Register());
+          infoz.push_back(sampler.Register(sampling_stride, elt_size));
         }
         switch (std::uniform_int_distribution<>(0, 2)(gen)) {
           case 0: {
-            infoz.push_back(sampler.Register());
+            infoz.push_back(sampler.Register(sampling_stride, elt_size));
             break;
           }
           case 1: {
@@ -358,6 +375,7 @@ TEST(HashtablezSamplerTest, MultiThreaded) {
             HashtablezInfo* info = infoz[p];
             infoz[p] = infoz.back();
             infoz.pop_back();
+            EXPECT_EQ(info->weight, sampling_stride);
             sampler.Unregister(info);
             break;
           }
diff --git a/third_party/abseil-cpp/absl/container/internal/have_sse.h b/third_party/abseil-cpp/absl/container/internal/have_sse.h
deleted file mode 100644
index e75e1a16d3..0000000000
--- a/third_party/abseil-cpp/absl/container/internal/have_sse.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Shared config probing for SSE instructions used in Swiss tables.
-#ifndef ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
-#define ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
-
-#ifndef ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-#if defined(__SSE2__) ||  \
-    (defined(_MSC_VER) && \
-     (defined(_M_X64) || (defined(_M_IX86) && _M_IX86_FP >= 2)))
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2 1
-#else
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2 0
-#endif
-#endif
-
-#ifndef ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
-#ifdef __SSSE3__
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3 1
-#else
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3 0
-#endif
-#endif
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3 && \
-    !ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-#error "Bad configuration!"
-#endif
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-#include <emmintrin.h>
-#endif
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
-#include <tmmintrin.h>
-#endif
-
-#endif  // ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
diff --git a/third_party/abseil-cpp/absl/container/internal/inlined_vector.h b/third_party/abseil-cpp/absl/container/internal/inlined_vector.h
index 1d7d6cda72..e2dd843f7c 100644
--- a/third_party/abseil-cpp/absl/container/internal/inlined_vector.h
+++ b/third_party/abseil-cpp/absl/container/internal/inlined_vector.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
-#define ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
+#ifndef ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_H_
+#define ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_H_
 
 #include <algorithm>
 #include <cstddef>
@@ -40,7 +40,6 @@ namespace inlined_vector_internal {
 #if !defined(__clang__) && defined(__GNUC__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Warray-bounds"
-#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
 #endif
 
 template <typename A>
@@ -84,6 +83,11 @@ using IsMemcpyOk =
                       absl::is_trivially_copy_assignable<ValueType<A>>,
                       absl::is_trivially_destructible<ValueType<A>>>;
 
+template <typename A>
+using IsMoveAssignOk = std::is_move_assignable<ValueType<A>>;
+template <typename A>
+using IsSwapOk = absl::type_traits_internal::IsSwappable<ValueType<A>>;
+
 template <typename T>
 struct TypeIdentity {
   using type = T;
@@ -94,16 +98,30 @@ struct TypeIdentity {
 template <typename T>
 using NoTypeDeduction = typename TypeIdentity<T>::type;
 
+template <typename A, bool IsTriviallyDestructible =
+                          absl::is_trivially_destructible<ValueType<A>>::value>
+struct DestroyAdapter;
+
 template <typename A>
-void DestroyElements(NoTypeDeduction<A>& allocator, Pointer<A> destroy_first,
-                     SizeType<A> destroy_size) {
-  if (destroy_first != nullptr) {
+struct DestroyAdapter<A, /* IsTriviallyDestructible */ false> {
+  static void DestroyElements(A& allocator, Pointer<A> destroy_first,
+                              SizeType<A> destroy_size) {
     for (SizeType<A> i = destroy_size; i != 0;) {
       --i;
       AllocatorTraits<A>::destroy(allocator, destroy_first + i);
     }
   }
-}
+};
+
+template <typename A>
+struct DestroyAdapter<A, /* IsTriviallyDestructible */ true> {
+  static void DestroyElements(A& allocator, Pointer<A> destroy_first,
+                              SizeType<A> destroy_size) {
+    static_cast<void>(allocator);
+    static_cast<void>(destroy_first);
+    static_cast<void>(destroy_size);
+  }
+};
 
 template <typename A>
 struct Allocation {
@@ -133,7 +151,7 @@ void ConstructElements(NoTypeDeduction<A>& allocator,
   for (SizeType<A> i = 0; i < construct_size; ++i) {
     ABSL_INTERNAL_TRY { values.ConstructNext(allocator, construct_first + i); }
     ABSL_INTERNAL_CATCH_ANY {
-      DestroyElements<A>(allocator, construct_first, i);
+      DestroyAdapter<A>::DestroyElements(allocator, construct_first, i);
       ABSL_INTERNAL_RETHROW;
     }
   }
@@ -253,7 +271,7 @@ class ConstructionTransaction {
 
   ~ConstructionTransaction() {
     if (DidConstruct()) {
-      DestroyElements<A>(GetAllocator(), GetData(), GetSize());
+      DestroyAdapter<A>::DestroyElements(GetAllocator(), GetData(), GetSize());
     }
   }
 
@@ -284,6 +302,20 @@ class ConstructionTransaction {
 template <typename T, size_t N, typename A>
 class Storage {
  public:
+  struct MemcpyPolicy {};
+  struct ElementwiseAssignPolicy {};
+  struct ElementwiseSwapPolicy {};
+  struct ElementwiseConstructPolicy {};
+
+  using MoveAssignmentPolicy = absl::conditional_t<
+      IsMemcpyOk<A>::value, MemcpyPolicy,
+      absl::conditional_t<IsMoveAssignOk<A>::value, ElementwiseAssignPolicy,
+                          ElementwiseConstructPolicy>>;
+  using SwapPolicy = absl::conditional_t<
+      IsMemcpyOk<A>::value, MemcpyPolicy,
+      absl::conditional_t<IsSwapOk<A>::value, ElementwiseSwapPolicy,
+                          ElementwiseConstructPolicy>>;
+
   static SizeType<A> NextCapacity(SizeType<A> current_capacity) {
     return current_capacity * 2;
   }
@@ -297,10 +329,10 @@ class Storage {
   // Storage Constructors and Destructor
   // ---------------------------------------------------------------------------
 
-  Storage() : metadata_(A(), /* size and is_allocated */ 0) {}
+  Storage() : metadata_(A(), /* size and is_allocated */ 0u) {}
 
   explicit Storage(const A& allocator)
-      : metadata_(allocator, /* size and is_allocated */ 0) {}
+      : metadata_(allocator, /* size and is_allocated */ 0u) {}
 
   ~Storage() {
     if (GetSizeAndIsAllocated() == 0) {
@@ -416,7 +448,7 @@ class Storage {
   }
 
   void SubtractSize(SizeType<A> count) {
-    assert(count <= GetSize());
+    ABSL_HARDENING_ASSERT(count <= GetSize());
 
     GetSizeAndIsAllocated() -= count << static_cast<SizeType<A>>(1);
   }
@@ -427,7 +459,8 @@ class Storage {
   }
 
   void MemcpyFrom(const Storage& other_storage) {
-    assert(IsMemcpyOk<A>::value || other_storage.GetIsAllocated());
+    ABSL_HARDENING_ASSERT(IsMemcpyOk<A>::value ||
+                          other_storage.GetIsAllocated());
 
     GetSizeAndIsAllocated() = other_storage.GetSizeAndIsAllocated();
     data_ = other_storage.data_;
@@ -459,6 +492,13 @@ class Storage {
     Inlined inlined;
   };
 
+  void SwapN(ElementwiseSwapPolicy, Storage* other, SizeType<A> n);
+  void SwapN(ElementwiseConstructPolicy, Storage* other, SizeType<A> n);
+
+  void SwapInlinedElements(MemcpyPolicy, Storage* other);
+  template <typename NotMemcpyPolicy>
+  void SwapInlinedElements(NotMemcpyPolicy, Storage* other);
+
   template <typename... Args>
   ABSL_ATTRIBUTE_NOINLINE Reference<A> EmplaceBackSlow(Args&&... args);
 
@@ -469,14 +509,14 @@ class Storage {
 template <typename T, size_t N, typename A>
 void Storage<T, N, A>::DestroyContents() {
   Pointer<A> data = GetIsAllocated() ? GetAllocatedData() : GetInlinedData();
-  DestroyElements<A>(GetAllocator(), data, GetSize());
+  DestroyAdapter<A>::DestroyElements(GetAllocator(), data, GetSize());
   DeallocateIfAllocated();
 }
 
 template <typename T, size_t N, typename A>
 void Storage<T, N, A>::InitFrom(const Storage& other) {
   const SizeType<A> n = other.GetSize();
-  assert(n > 0);  // Empty sources handled handled in caller.
+  ABSL_HARDENING_ASSERT(n > 0);  // Empty sources handled handled in caller.
   ConstPointer<A> src;
   Pointer<A> dst;
   if (!other.GetIsAllocated()) {
@@ -508,8 +548,8 @@ template <typename ValueAdapter>
 auto Storage<T, N, A>::Initialize(ValueAdapter values, SizeType<A> new_size)
     -> void {
   // Only callable from constructors!
-  assert(!GetIsAllocated());
-  assert(GetSize() == 0);
+  ABSL_HARDENING_ASSERT(!GetIsAllocated());
+  ABSL_HARDENING_ASSERT(GetSize() == 0);
 
   Pointer<A> construct_data;
   if (new_size > GetInlinedCapacity()) {
@@ -566,7 +606,8 @@ auto Storage<T, N, A>::Assign(ValueAdapter values, SizeType<A> new_size)
   ConstructElements<A>(GetAllocator(), construct_loop.data(), values,
                        construct_loop.size());
 
-  DestroyElements<A>(GetAllocator(), destroy_loop.data(), destroy_loop.size());
+  DestroyAdapter<A>::DestroyElements(GetAllocator(), destroy_loop.data(),
+                                     destroy_loop.size());
 
   if (allocation_tx.DidAllocate()) {
     DeallocateIfAllocated();
@@ -587,7 +628,7 @@ auto Storage<T, N, A>::Resize(ValueAdapter values, SizeType<A> new_size)
   A& alloc = GetAllocator();
   if (new_size <= size) {
     // Destroy extra old elements.
-    DestroyElements<A>(alloc, base + new_size, size - new_size);
+    DestroyAdapter<A>::DestroyElements(alloc, base + new_size, size - new_size);
   } else if (new_size <= storage_view.capacity) {
     // Construct new elements in place.
     ConstructElements<A>(alloc, base + size, values, new_size - size);
@@ -595,7 +636,7 @@ auto Storage<T, N, A>::Resize(ValueAdapter values, SizeType<A> new_size)
     // Steps:
     //  a. Allocate new backing store.
     //  b. Construct new elements in new backing store.
-    //  c. Move existing elements from old backing store to now.
+    //  c. Move existing elements from old backing store to new backing store.
     //  d. Destroy all elements in old backing store.
     // Use transactional wrappers for the first two steps so we can roll
     // back if necessary due to exceptions.
@@ -611,7 +652,7 @@ auto Storage<T, N, A>::Resize(ValueAdapter values, SizeType<A> new_size)
         (MoveIterator<A>(base)));
     ConstructElements<A>(alloc, new_data, move_values, size);
 
-    DestroyElements<A>(alloc, base, size);
+    DestroyAdapter<A>::DestroyElements(alloc, base, size);
     std::move(construction_tx).Commit();
     DeallocateIfAllocated();
     SetAllocation(std::move(allocation_tx).Release());
@@ -626,8 +667,8 @@ auto Storage<T, N, A>::Insert(ConstIterator<A> pos, ValueAdapter values,
                               SizeType<A> insert_count) -> Iterator<A> {
   StorageView<A> storage_view = MakeStorageView();
 
-  SizeType<A> insert_index =
-      std::distance(ConstIterator<A>(storage_view.data), pos);
+  auto insert_index = static_cast<SizeType<A>>(
+      std::distance(ConstIterator<A>(storage_view.data), pos));
   SizeType<A> insert_end_index = insert_index + insert_count;
   SizeType<A> new_size = storage_view.size + insert_count;
 
@@ -650,7 +691,8 @@ auto Storage<T, N, A>::Insert(ConstIterator<A> pos, ValueAdapter values,
     ConstructElements<A>(GetAllocator(), new_data + insert_end_index,
                          move_values, storage_view.size - insert_index);
 
-    DestroyElements<A>(GetAllocator(), storage_view.data, storage_view.size);
+    DestroyAdapter<A>::DestroyElements(GetAllocator(), storage_view.data,
+                                       storage_view.size);
 
     std::move(construction_tx).Commit();
     std::move(move_construction_tx).Commit();
@@ -753,7 +795,8 @@ auto Storage<T, N, A>::EmplaceBackSlow(Args&&... args) -> Reference<A> {
     ABSL_INTERNAL_RETHROW;
   }
   // Destroy elements in old backing store.
-  DestroyElements<A>(GetAllocator(), storage_view.data, storage_view.size);
+  DestroyAdapter<A>::DestroyElements(GetAllocator(), storage_view.data,
+                                     storage_view.size);
 
   DeallocateIfAllocated();
   SetAllocation(std::move(allocation_tx).Release());
@@ -767,9 +810,9 @@ auto Storage<T, N, A>::Erase(ConstIterator<A> from, ConstIterator<A> to)
     -> Iterator<A> {
   StorageView<A> storage_view = MakeStorageView();
 
-  SizeType<A> erase_size = std::distance(from, to);
-  SizeType<A> erase_index =
-      std::distance(ConstIterator<A>(storage_view.data), from);
+  auto erase_size = static_cast<SizeType<A>>(std::distance(from, to));
+  auto erase_index = static_cast<SizeType<A>>(
+      std::distance(ConstIterator<A>(storage_view.data), from));
   SizeType<A> erase_end_index = erase_index + erase_size;
 
   IteratorValueAdapter<A, MoveIterator<A>> move_values(
@@ -778,9 +821,9 @@ auto Storage<T, N, A>::Erase(ConstIterator<A> from, ConstIterator<A> to)
   AssignElements<A>(storage_view.data + erase_index, move_values,
                     storage_view.size - erase_end_index);
 
-  DestroyElements<A>(GetAllocator(),
-                     storage_view.data + (storage_view.size - erase_size),
-                     erase_size);
+  DestroyAdapter<A>::DestroyElements(
+      GetAllocator(), storage_view.data + (storage_view.size - erase_size),
+      erase_size);
 
   SubtractSize(erase_size);
   return Iterator<A>(storage_view.data + erase_index);
@@ -804,7 +847,8 @@ auto Storage<T, N, A>::Reserve(SizeType<A> requested_capacity) -> void {
   ConstructElements<A>(GetAllocator(), new_data, move_values,
                        storage_view.size);
 
-  DestroyElements<A>(GetAllocator(), storage_view.data, storage_view.size);
+  DestroyAdapter<A>::DestroyElements(GetAllocator(), storage_view.data,
+                                     storage_view.size);
 
   DeallocateIfAllocated();
   SetAllocation(std::move(allocation_tx).Release());
@@ -814,7 +858,7 @@ auto Storage<T, N, A>::Reserve(SizeType<A> requested_capacity) -> void {
 template <typename T, size_t N, typename A>
 auto Storage<T, N, A>::ShrinkToFit() -> void {
   // May only be called on allocated instances!
-  assert(GetIsAllocated());
+  ABSL_HARDENING_ASSERT(GetIsAllocated());
 
   StorageView<A> storage_view{GetAllocatedData(), GetSize(),
                               GetAllocatedCapacity()};
@@ -847,7 +891,8 @@ auto Storage<T, N, A>::ShrinkToFit() -> void {
     ABSL_INTERNAL_RETHROW;
   }
 
-  DestroyElements<A>(GetAllocator(), storage_view.data, storage_view.size);
+  DestroyAdapter<A>::DestroyElements(GetAllocator(), storage_view.data,
+                                     storage_view.size);
 
   MallocAdapter<A>::Deallocate(GetAllocator(), storage_view.data,
                                storage_view.capacity);
@@ -862,30 +907,12 @@ auto Storage<T, N, A>::ShrinkToFit() -> void {
 template <typename T, size_t N, typename A>
 auto Storage<T, N, A>::Swap(Storage* other_storage_ptr) -> void {
   using std::swap;
-  assert(this != other_storage_ptr);
+  ABSL_HARDENING_ASSERT(this != other_storage_ptr);
 
   if (GetIsAllocated() && other_storage_ptr->GetIsAllocated()) {
     swap(data_.allocated, other_storage_ptr->data_.allocated);
   } else if (!GetIsAllocated() && !other_storage_ptr->GetIsAllocated()) {
-    Storage* small_ptr = this;
-    Storage* large_ptr = other_storage_ptr;
-    if (small_ptr->GetSize() > large_ptr->GetSize()) swap(small_ptr, large_ptr);
-
-    for (SizeType<A> i = 0; i < small_ptr->GetSize(); ++i) {
-      swap(small_ptr->GetInlinedData()[i], large_ptr->GetInlinedData()[i]);
-    }
-
-    IteratorValueAdapter<A, MoveIterator<A>> move_values(
-        MoveIterator<A>(large_ptr->GetInlinedData() + small_ptr->GetSize()));
-
-    ConstructElements<A>(large_ptr->GetAllocator(),
-                         small_ptr->GetInlinedData() + small_ptr->GetSize(),
-                         move_values,
-                         large_ptr->GetSize() - small_ptr->GetSize());
-
-    DestroyElements<A>(large_ptr->GetAllocator(),
-                       large_ptr->GetInlinedData() + small_ptr->GetSize(),
-                       large_ptr->GetSize() - small_ptr->GetSize());
+    SwapInlinedElements(SwapPolicy{}, other_storage_ptr);
   } else {
     Storage* allocated_ptr = this;
     Storage* inlined_ptr = other_storage_ptr;
@@ -904,23 +931,86 @@ auto Storage<T, N, A>::Swap(Storage* other_storage_ptr) -> void {
                            inlined_ptr->GetSize());
     }
     ABSL_INTERNAL_CATCH_ANY {
-      allocated_ptr->SetAllocation(
-          {allocated_storage_view.data, allocated_storage_view.capacity});
+      allocated_ptr->SetAllocation(Allocation<A>{
+          allocated_storage_view.data, allocated_storage_view.capacity});
       ABSL_INTERNAL_RETHROW;
     }
 
-    DestroyElements<A>(inlined_ptr->GetAllocator(),
-                       inlined_ptr->GetInlinedData(), inlined_ptr->GetSize());
+    DestroyAdapter<A>::DestroyElements(inlined_ptr->GetAllocator(),
+                                       inlined_ptr->GetInlinedData(),
+                                       inlined_ptr->GetSize());
 
-    inlined_ptr->SetAllocation(
-        {allocated_storage_view.data, allocated_storage_view.capacity});
+    inlined_ptr->SetAllocation(Allocation<A>{allocated_storage_view.data,
+                                             allocated_storage_view.capacity});
   }
 
   swap(GetSizeAndIsAllocated(), other_storage_ptr->GetSizeAndIsAllocated());
   swap(GetAllocator(), other_storage_ptr->GetAllocator());
 }
 
-// End ignore "array-bounds" and "maybe-uninitialized"
+template <typename T, size_t N, typename A>
+void Storage<T, N, A>::SwapN(ElementwiseSwapPolicy, Storage* other,
+                             SizeType<A> n) {
+  std::swap_ranges(GetInlinedData(), GetInlinedData() + n,
+                   other->GetInlinedData());
+}
+
+template <typename T, size_t N, typename A>
+void Storage<T, N, A>::SwapN(ElementwiseConstructPolicy, Storage* other,
+                             SizeType<A> n) {
+  Pointer<A> a = GetInlinedData();
+  Pointer<A> b = other->GetInlinedData();
+  // see note on allocators in `SwapInlinedElements`.
+  A& allocator_a = GetAllocator();
+  A& allocator_b = other->GetAllocator();
+  for (SizeType<A> i = 0; i < n; ++i, ++a, ++b) {
+    ValueType<A> tmp(std::move(*a));
+
+    AllocatorTraits<A>::destroy(allocator_a, a);
+    AllocatorTraits<A>::construct(allocator_b, a, std::move(*b));
+
+    AllocatorTraits<A>::destroy(allocator_b, b);
+    AllocatorTraits<A>::construct(allocator_a, b, std::move(tmp));
+  }
+}
+
+template <typename T, size_t N, typename A>
+void Storage<T, N, A>::SwapInlinedElements(MemcpyPolicy, Storage* other) {
+  Data tmp = data_;
+  data_ = other->data_;
+  other->data_ = tmp;
+}
+
+template <typename T, size_t N, typename A>
+template <typename NotMemcpyPolicy>
+void Storage<T, N, A>::SwapInlinedElements(NotMemcpyPolicy policy,
+                                           Storage* other) {
+  // Note: `destroy` needs to use pre-swap allocator while `construct` -
+  // post-swap allocator. Allocators will be swaped later on outside of
+  // `SwapInlinedElements`.
+  Storage* small_ptr = this;
+  Storage* large_ptr = other;
+  if (small_ptr->GetSize() > large_ptr->GetSize()) {
+    std::swap(small_ptr, large_ptr);
+  }
+
+  auto small_size = small_ptr->GetSize();
+  auto diff = large_ptr->GetSize() - small_size;
+  SwapN(policy, other, small_size);
+
+  IteratorValueAdapter<A, MoveIterator<A>> move_values(
+      MoveIterator<A>(large_ptr->GetInlinedData() + small_size));
+
+  ConstructElements<A>(large_ptr->GetAllocator(),
+                       small_ptr->GetInlinedData() + small_size, move_values,
+                       diff);
+
+  DestroyAdapter<A>::DestroyElements(large_ptr->GetAllocator(),
+                                     large_ptr->GetInlinedData() + small_size,
+                                     diff);
+}
+
+// End ignore "array-bounds"
 #if !defined(__clang__) && defined(__GNUC__)
 #pragma GCC diagnostic pop
 #endif
@@ -929,4 +1019,4 @@ auto Storage<T, N, A>::Swap(Storage* other_storage_ptr) -> void {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
+#endif  // ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_H_
diff --git a/third_party/abseil-cpp/absl/container/internal/node_hash_policy.h b/third_party/abseil-cpp/absl/container/internal/node_slot_policy.h
index 4617162f0b..baba5743c8 100644
--- a/third_party/abseil-cpp/absl/container/internal/node_hash_policy.h
+++ b/third_party/abseil-cpp/absl/container/internal/node_slot_policy.h
@@ -30,8 +30,8 @@
 // It may also optionally define `value()` and `apply()`. For documentation on
 // these, see hash_policy_traits.h.
 
-#ifndef ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_
-#define ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_
+#ifndef ABSL_CONTAINER_INTERNAL_NODE_SLOT_POLICY_H_
+#define ABSL_CONTAINER_INTERNAL_NODE_SLOT_POLICY_H_
 
 #include <cassert>
 #include <cstddef>
@@ -46,7 +46,7 @@ ABSL_NAMESPACE_BEGIN
 namespace container_internal {
 
 template <class Reference, class Policy>
-struct node_hash_policy {
+struct node_slot_policy {
   static_assert(std::is_lvalue_reference<Reference>::value, "");
 
   using slot_type = typename std::remove_cv<
@@ -89,4 +89,4 @@ struct node_hash_policy {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_
+#endif  // ABSL_CONTAINER_INTERNAL_NODE_SLOT_POLICY_H_
diff --git a/third_party/abseil-cpp/absl/container/internal/node_hash_policy_test.cc b/third_party/abseil-cpp/absl/container/internal/node_slot_policy_test.cc
index 84aabba968..51b7467bfb 100644
--- a/third_party/abseil-cpp/absl/container/internal/node_hash_policy_test.cc
+++ b/third_party/abseil-cpp/absl/container/internal/node_slot_policy_test.cc
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "absl/container/internal/node_hash_policy.h"
+#include "absl/container/internal/node_slot_policy.h"
 
 #include <memory>
 
@@ -27,7 +27,7 @@ namespace {
 
 using ::testing::Pointee;
 
-struct Policy : node_hash_policy<int&, Policy> {
+struct Policy : node_slot_policy<int&, Policy> {
   using key_type = int;
   using init_type = int;
 
diff --git a/third_party/abseil-cpp/absl/container/internal/raw_hash_set.cc b/third_party/abseil-cpp/absl/container/internal/raw_hash_set.cc
index 687bcb8a4d..c63a2e02d1 100644
--- a/third_party/abseil-cpp/absl/container/internal/raw_hash_set.cc
+++ b/third_party/abseil-cpp/absl/container/internal/raw_hash_set.cc
@@ -23,13 +23,17 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace container_internal {
 
+// A single block of empty control bytes for tables without any slots allocated.
+// This enables removing a branch in the hot path of find().
 alignas(16) ABSL_CONST_INIT ABSL_DLL const ctrl_t kEmptyGroup[16] = {
     ctrl_t::kSentinel, ctrl_t::kEmpty, ctrl_t::kEmpty, ctrl_t::kEmpty,
     ctrl_t::kEmpty,    ctrl_t::kEmpty, ctrl_t::kEmpty, ctrl_t::kEmpty,
     ctrl_t::kEmpty,    ctrl_t::kEmpty, ctrl_t::kEmpty, ctrl_t::kEmpty,
     ctrl_t::kEmpty,    ctrl_t::kEmpty, ctrl_t::kEmpty, ctrl_t::kEmpty};
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 constexpr size_t Group::kWidth;
+#endif
 
 // Returns "random" seed.
 inline size_t RandomSeed() {
diff --git a/third_party/abseil-cpp/absl/container/internal/raw_hash_set.h b/third_party/abseil-cpp/absl/container/internal/raw_hash_set.h
index 12682b3532..676cebd731 100644
--- a/third_party/abseil-cpp/absl/container/internal/raw_hash_set.h
+++ b/third_party/abseil-cpp/absl/container/internal/raw_hash_set.h
@@ -53,51 +53,121 @@
 //
 // IMPLEMENTATION DETAILS
 //
-// The table stores elements inline in a slot array. In addition to the slot
-// array the table maintains some control state per slot. The extra state is one
-// byte per slot and stores empty or deleted marks, or alternatively 7 bits from
-// the hash of an occupied slot. The table is split into logical groups of
-// slots, like so:
+// # Table Layout
+//
+// A raw_hash_set's backing array consists of control bytes followed by slots
+// that may or may not contain objects.
+//
+// The layout of the backing array, for `capacity` slots, is thus, as a
+// pseudo-struct:
+//
+//   struct BackingArray {
+//     // Control bytes for the "real" slots.
+//     ctrl_t ctrl[capacity];
+//     // Always `ctrl_t::kSentinel`. This is used by iterators to find when to
+//     // stop and serves no other purpose.
+//     ctrl_t sentinel;
+//     // A copy of the first `kWidth - 1` elements of `ctrl`. This is used so
+//     // that if a probe sequence picks a value near the end of `ctrl`,
+//     // `Group` will have valid control bytes to look at.
+//     ctrl_t clones[kWidth - 1];
+//     // The actual slot data.
+//     slot_type slots[capacity];
+//   };
+//
+// The length of this array is computed by `AllocSize()` below.
+//
+// Control bytes (`ctrl_t`) are bytes (collected into groups of a
+// platform-specific size) that define the state of the corresponding slot in
+// the slot array. Group manipulation is tightly optimized to be as efficient
+// as possible: SSE and friends on x86, clever bit operations on other arches.
 //
 //      Group 1         Group 2        Group 3
 // +---------------+---------------+---------------+
 // | | | | | | | | | | | | | | | | | | | | | | | | |
 // +---------------+---------------+---------------+
 //
-// On lookup the hash is split into two parts:
-// - H2: 7 bits (those stored in the control bytes)
-// - H1: the rest of the bits
-// The groups are probed using H1. For each group the slots are matched to H2 in
-// parallel. Because H2 is 7 bits (128 states) and the number of slots per group
-// is low (8 or 16) in almost all cases a match in H2 is also a lookup hit.
+// Each control byte is either a special value for empty slots, deleted slots
+// (sometimes called *tombstones*), and a special end-of-table marker used by
+// iterators, or, if occupied, seven bits (H2) from the hash of the value in the
+// corresponding slot.
+//
+// Storing control bytes in a separate array also has beneficial cache effects,
+// since more logical slots will fit into a cache line.
+//
+// # Hashing
+//
+// We compute two separate hashes, `H1` and `H2`, from the hash of an object.
+// `H1(hash(x))` is an index into `slots`, and essentially the starting point
+// for the probe sequence. `H2(hash(x))` is a 7-bit value used to filter out
+// objects that cannot possibly be the one we are looking for.
+//
+// # Table operations.
 //
-// On insert, once the right group is found (as in lookup), its slots are
-// filled in order.
+// The key operations are `insert`, `find`, and `erase`.
 //
-// On erase a slot is cleared. In case the group did not have any empty slots
-// before the erase, the erased slot is marked as deleted.
+// Since `insert` and `erase` are implemented in terms of `find`, we describe
+// `find` first. To `find` a value `x`, we compute `hash(x)`. From
+// `H1(hash(x))` and the capacity, we construct a `probe_seq` that visits every
+// group of slots in some interesting order.
 //
-// Groups without empty slots (but maybe with deleted slots) extend the probe
-// sequence. The probing algorithm is quadratic. Given N the number of groups,
-// the probing function for the i'th probe is:
+// We now walk through these indices. At each index, we select the entire group
+// starting with that index and extract potential candidates: occupied slots
+// with a control byte equal to `H2(hash(x))`. If we find an empty slot in the
+// group, we stop and return an error. Each candidate slot `y` is compared with
+// `x`; if `x == y`, we are done and return `&y`; otherwise we contine to the
+// next probe index. Tombstones effectively behave like full slots that never
+// match the value we're looking for.
 //
-//   P(0) = H1 % N
+// The `H2` bits ensure when we compare a slot to an object with `==`, we are
+// likely to have actually found the object.  That is, the chance is low that
+// `==` is called and returns `false`.  Thus, when we search for an object, we
+// are unlikely to call `==` many times.  This likelyhood can be analyzed as
+// follows (assuming that H2 is a random enough hash function).
 //
-//   P(i) = (P(i - 1) + i) % N
+// Let's assume that there are `k` "wrong" objects that must be examined in a
+// probe sequence.  For example, when doing a `find` on an object that is in the
+// table, `k` is the number of objects between the start of the probe sequence
+// and the final found object (not including the final found object).  The
+// expected number of objects with an H2 match is then `k/128`.  Measurements
+// and analysis indicate that even at high load factors, `k` is less than 32,
+// meaning that the number of "false positive" comparisons we must perform is
+// less than 1/8 per `find`.
+
+// `insert` is implemented in terms of `unchecked_insert`, which inserts a
+// value presumed to not be in the table (violating this requirement will cause
+// the table to behave erratically). Given `x` and its hash `hash(x)`, to insert
+// it, we construct a `probe_seq` once again, and use it to find the first
+// group with an unoccupied (empty *or* deleted) slot. We place `x` into the
+// first such slot in the group and mark it as full with `x`'s H2.
 //
-// This probing function guarantees that after N probes, all the groups of the
-// table will be probed exactly once.
+// To `insert`, we compose `unchecked_insert` with `find`. We compute `h(x)` and
+// perform a `find` to see if it's already present; if it is, we're done. If
+// it's not, we may decide the table is getting overcrowded (i.e. the load
+// factor is greater than 7/8 for big tables; `is_small()` tables use a max load
+// factor of 1); in this case, we allocate a bigger array, `unchecked_insert`
+// each element of the table into the new array (we know that no insertion here
+// will insert an already-present value), and discard the old backing array. At
+// this point, we may `unchecked_insert` the value `x`.
 //
-// The control state and slot array are stored contiguously in a shared heap
-// allocation. The layout of this allocation is: `capacity()` control bytes,
-// one sentinel control byte, `Group::kWidth - 1` cloned control bytes,
-// <possible padding>, `capacity()` slots. The sentinel control byte is used in
-// iteration so we know when we reach the end of the table. The cloned control
-// bytes at the end of the table are cloned from the beginning of the table so
-// groups that begin near the end of the table can see a full group. In cases in
-// which there are more than `capacity()` cloned control bytes, the extra bytes
-// are `kEmpty`, and these ensure that we always see at least one empty slot and
-// can stop an unsuccessful search.
+// Below, `unchecked_insert` is partly implemented by `prepare_insert`, which
+// presents a viable, initialized slot pointee to the caller.
+//
+// `erase` is implemented in terms of `erase_at`, which takes an index to a
+// slot. Given an offset, we simply create a tombstone and destroy its contents.
+// If we can prove that the slot would not appear in a probe sequence, we can
+// make the slot as empty, instead. We can prove this by observing that if a
+// group has any empty slots, it has never been full (assuming we never create
+// an empty slot in a group with no empties, which this heuristic guarantees we
+// never do) and find would stop at this group anyways (since it does not probe
+// beyond groups with empties).
+//
+// `erase` is `erase_at` composed with `find`: if we
+// have a value `x`, we can perform a `find`, and then `erase_at` the resulting
+// slot.
+//
+// To iterate, we simply traverse the array, skipping empty and deleted slots
+// and stopping when we hit a `kSentinel`.
 
 #ifndef ABSL_CONTAINER_INTERNAL_RAW_HASH_SET_H_
 #define ABSL_CONTAINER_INTERNAL_RAW_HASH_SET_H_
@@ -113,7 +183,9 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/base/config.h"
 #include "absl/base/internal/endian.h"
+#include "absl/base/internal/prefetch.h"
 #include "absl/base/optimization.h"
 #include "absl/base/port.h"
 #include "absl/container/internal/common.h"
@@ -122,12 +194,27 @@
 #include "absl/container/internal/hash_policy_traits.h"
 #include "absl/container/internal/hashtable_debug_hooks.h"
 #include "absl/container/internal/hashtablez_sampler.h"
-#include "absl/container/internal/have_sse.h"
 #include "absl/memory/memory.h"
 #include "absl/meta/type_traits.h"
 #include "absl/numeric/bits.h"
 #include "absl/utility/utility.h"
 
+#ifdef ABSL_INTERNAL_HAVE_SSE2
+#include <emmintrin.h>
+#endif
+
+#ifdef ABSL_INTERNAL_HAVE_SSSE3
+#include <tmmintrin.h>
+#endif
+
+#ifdef _MSC_VER
+#include <intrin.h>
+#endif
+
+#ifdef ABSL_INTERNAL_HAVE_ARM_NEON
+#include <arm_neon.h>
+#endif
+
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace container_internal {
@@ -142,14 +229,40 @@ template <typename AllocType>
 void SwapAlloc(AllocType& /*lhs*/, AllocType& /*rhs*/,
                std::false_type /* propagate_on_container_swap */) {}
 
+// The state for a probe sequence.
+//
+// Currently, the sequence is a triangular progression of the form
+//
+//   p(i) := Width * (i^2 + i)/2 + hash (mod mask + 1)
+//
+// The use of `Width` ensures that each probe step does not overlap groups;
+// the sequence effectively outputs the addresses of *groups* (although not
+// necessarily aligned to any boundary). The `Group` machinery allows us
+// to check an entire group with minimal branching.
+//
+// Wrapping around at `mask + 1` is important, but not for the obvious reason.
+// As described above, the first few entries of the control byte array
+// are mirrored at the end of the array, which `Group` will find and use
+// for selecting candidates. However, when those candidates' slots are
+// actually inspected, there are no corresponding slots for the cloned bytes,
+// so we need to make sure we've treated those offsets as "wrapping around".
+//
+// It turns out that this probe sequence visits every group exactly once if the
+// number of groups is a power of two, since (i^2+i)/2 is a bijection in
+// Z/(2^m). See https://en.wikipedia.org/wiki/Quadratic_probing
 template <size_t Width>
 class probe_seq {
  public:
+  // Creates a new probe sequence using `hash` as the initial value of the
+  // sequence and `mask` (usually the capacity of the table) as the mask to
+  // apply to each value in the progression.
   probe_seq(size_t hash, size_t mask) {
     assert(((mask + 1) & mask) == 0 && "not a mask");
     mask_ = mask;
     offset_ = hash & mask_;
   }
+
+  // The offset within the table, i.e., the value `p(i)` above.
   size_t offset() const { return offset_; }
   size_t offset(size_t i) const { return (offset_ + i) & mask_; }
 
@@ -158,7 +271,7 @@ class probe_seq {
     offset_ += index_;
     offset_ &= mask_;
   }
-  // 0-based probe index. The i-th probe in the probe sequence.
+  // 0-based probe index, a multiple of `Width`.
   size_t index() const { return index_; }
 
  private:
@@ -182,9 +295,9 @@ struct IsDecomposable : std::false_type {};
 
 template <class Policy, class Hash, class Eq, class... Ts>
 struct IsDecomposable<
-    absl::void_t<decltype(
-        Policy::apply(RequireUsableKey<typename Policy::key_type, Hash, Eq>(),
-                      std::declval<Ts>()...))>,
+    absl::void_t<decltype(Policy::apply(
+        RequireUsableKey<typename Policy::key_type, Hash, Eq>(),
+        std::declval<Ts>()...))>,
     Policy, Hash, Eq, Ts...> : std::true_type {};
 
 // TODO(alkis): Switch to std::is_nothrow_swappable when gcc/clang supports it.
@@ -200,57 +313,84 @@ constexpr bool IsNoThrowSwappable(std::false_type /* is_swappable */) {
 
 template <typename T>
 uint32_t TrailingZeros(T x) {
-  ABSL_INTERNAL_ASSUME(x != 0);
-  return countr_zero(x);
+  ABSL_ASSUME(x != 0);
+  return static_cast<uint32_t>(countr_zero(x));
 }
 
-// An abstraction over a bitmask. It provides an easy way to iterate through the
-// indexes of the set bits of a bitmask.  When Shift=0 (platforms with SSE),
-// this is a true bitmask.  On non-SSE, platforms the arithematic used to
-// emulate the SSE behavior works in bytes (Shift=3) and leaves each bytes as
-// either 0x00 or 0x80.
+// An abstract bitmask, such as that emitted by a SIMD instruction.
 //
-// For example:
-//   for (int i : BitMask<uint32_t, 16>(0x5)) -> yields 0, 2
-//   for (int i : BitMask<uint64_t, 8, 3>(0x0000000080800000)) -> yields 2, 3
+// Specifically, this type implements a simple bitset whose representation is
+// controlled by `SignificantBits` and `Shift`. `SignificantBits` is the number
+// of abstract bits in the bitset, while `Shift` is the log-base-two of the
+// width of an abstract bit in the representation.
+// This mask provides operations for any number of real bits set in an abstract
+// bit. To add iteration on top of that, implementation must guarantee no more
+// than one real bit is set in an abstract bit.
 template <class T, int SignificantBits, int Shift = 0>
-class BitMask {
-  static_assert(std::is_unsigned<T>::value, "");
-  static_assert(Shift == 0 || Shift == 3, "");
-
+class NonIterableBitMask {
  public:
-  // These are useful for unit tests (gunit).
-  using value_type = int;
-  using iterator = BitMask;
-  using const_iterator = BitMask;
+  explicit NonIterableBitMask(T mask) : mask_(mask) {}
 
-  explicit BitMask(T mask) : mask_(mask) {}
-  BitMask& operator++() {
-    mask_ &= (mask_ - 1);
-    return *this;
-  }
-  explicit operator bool() const { return mask_ != 0; }
-  int operator*() const { return LowestBitSet(); }
+  explicit operator bool() const { return this->mask_ != 0; }
+
+  // Returns the index of the lowest *abstract* bit set in `self`.
   uint32_t LowestBitSet() const {
     return container_internal::TrailingZeros(mask_) >> Shift;
   }
+
+  // Returns the index of the highest *abstract* bit set in `self`.
   uint32_t HighestBitSet() const {
     return static_cast<uint32_t>((bit_width(mask_) - 1) >> Shift);
   }
 
-  BitMask begin() const { return *this; }
-  BitMask end() const { return BitMask(0); }
-
+  // Return the number of trailing zero *abstract* bits.
   uint32_t TrailingZeros() const {
     return container_internal::TrailingZeros(mask_) >> Shift;
   }
 
+  // Return the number of leading zero *abstract* bits.
   uint32_t LeadingZeros() const {
     constexpr int total_significant_bits = SignificantBits << Shift;
     constexpr int extra_bits = sizeof(T) * 8 - total_significant_bits;
-    return countl_zero(mask_ << extra_bits) >> Shift;
+    return static_cast<uint32_t>(countl_zero(mask_ << extra_bits)) >> Shift;
   }
 
+  T mask_;
+};
+
+// Mask that can be iterable
+//
+// For example, when `SignificantBits` is 16 and `Shift` is zero, this is just
+// an ordinary 16-bit bitset occupying the low 16 bits of `mask`. When
+// `SignificantBits` is 8 and `Shift` is 3, abstract bits are represented as
+// the bytes `0x00` and `0x80`, and it occupies all 64 bits of the bitmask.
+//
+// For example:
+//   for (int i : BitMask<uint32_t, 16>(0b101)) -> yields 0, 2
+//   for (int i : BitMask<uint64_t, 8, 3>(0x0000000080800000)) -> yields 2, 3
+template <class T, int SignificantBits, int Shift = 0>
+class BitMask : public NonIterableBitMask<T, SignificantBits, Shift> {
+  using Base = NonIterableBitMask<T, SignificantBits, Shift>;
+  static_assert(std::is_unsigned<T>::value, "");
+  static_assert(Shift == 0 || Shift == 3, "");
+
+ public:
+  explicit BitMask(T mask) : Base(mask) {}
+  // BitMask is an iterator over the indices of its abstract bits.
+  using value_type = int;
+  using iterator = BitMask;
+  using const_iterator = BitMask;
+
+  BitMask& operator++() {
+    this->mask_ &= (this->mask_ - 1);
+    return *this;
+  }
+
+  uint32_t operator*() const { return Base::LowestBitSet(); }
+
+  BitMask begin() const { return *this; }
+  BitMask end() const { return BitMask(0); }
+
  private:
   friend bool operator==(const BitMask& a, const BitMask& b) {
     return a.mask_ == b.mask_;
@@ -258,15 +398,27 @@ class BitMask {
   friend bool operator!=(const BitMask& a, const BitMask& b) {
     return a.mask_ != b.mask_;
   }
-
-  T mask_;
 };
 
 using h2_t = uint8_t;
 
 // The values here are selected for maximum performance. See the static asserts
-// below for details. We use an enum class so that when strict aliasing is
-// enabled, the compiler knows ctrl_t doesn't alias other types.
+// below for details.
+
+// A `ctrl_t` is a single control byte, which can have one of four
+// states: empty, deleted, full (which has an associated seven-bit h2_t value)
+// and the sentinel. They have the following bit patterns:
+//
+//      empty: 1 0 0 0 0 0 0 0
+//    deleted: 1 1 1 1 1 1 1 0
+//       full: 0 h h h h h h h  // h represents the hash bits.
+//   sentinel: 1 1 1 1 1 1 1 1
+//
+// These values are specifically tuned for SSE-flavored SIMD.
+// The static_asserts below detail the source of these choices.
+//
+// We use an enum class so that when strict aliasing is enabled, the compiler
+// knows ctrl_t doesn't alias other types.
 enum class ctrl_t : int8_t {
   kEmpty = -128,   // 0b10000000
   kDeleted = -2,   // 0b11111110
@@ -294,15 +446,17 @@ static_assert(
      static_cast<int8_t>(ctrl_t::kSentinel) & 0x7F) != 0,
     "ctrl_t::kEmpty and ctrl_t::kDeleted must share an unset bit that is not "
     "shared by ctrl_t::kSentinel to make the scalar test for "
-    "MatchEmptyOrDeleted() efficient");
+    "MaskEmptyOrDeleted() efficient");
 static_assert(ctrl_t::kDeleted == static_cast<ctrl_t>(-2),
               "ctrl_t::kDeleted must be -2 to make the implementation of "
               "ConvertSpecialToEmptyAndFullToDeleted efficient");
 
-// A single block of empty control bytes for tables without any slots allocated.
-// This enables removing a branch in the hot path of find().
 ABSL_DLL extern const ctrl_t kEmptyGroup[16];
+
+// Returns a pointer to a control byte group that can be used by empty tables.
 inline ctrl_t* EmptyGroup() {
+  // Const must be cast away here; no uses of this function will actually write
+  // to it, because it is only used for empty tables.
   return const_cast<ctrl_t*>(kEmptyGroup);
 }
 
@@ -310,28 +464,61 @@ inline ctrl_t* EmptyGroup() {
 // randomize insertion order within groups.
 bool ShouldInsertBackwards(size_t hash, const ctrl_t* ctrl);
 
-// Returns a hash seed.
+// Returns a per-table, hash salt, which changes on resize. This gets mixed into
+// H1 to randomize iteration order per-table.
 //
 // The seed consists of the ctrl_ pointer, which adds enough entropy to ensure
 // non-determinism of iteration order in most cases.
-inline size_t HashSeed(const ctrl_t* ctrl) {
+inline size_t PerTableSalt(const ctrl_t* ctrl) {
   // The low bits of the pointer have little or no entropy because of
   // alignment. We shift the pointer to try to use higher entropy bits. A
   // good number seems to be 12 bits, because that aligns with page size.
   return reinterpret_cast<uintptr_t>(ctrl) >> 12;
 }
-
+// Extracts the H1 portion of a hash: 57 bits mixed with a per-table salt.
 inline size_t H1(size_t hash, const ctrl_t* ctrl) {
-  return (hash >> 7) ^ HashSeed(ctrl);
+  return (hash >> 7) ^ PerTableSalt(ctrl);
 }
+
+// Extracts the H2 portion of a hash: the 7 bits not used for H1.
+//
+// These are used as an occupied control byte.
 inline h2_t H2(size_t hash) { return hash & 0x7F; }
 
+// Helpers for checking the state of a control byte.
 inline bool IsEmpty(ctrl_t c) { return c == ctrl_t::kEmpty; }
 inline bool IsFull(ctrl_t c) { return c >= static_cast<ctrl_t>(0); }
 inline bool IsDeleted(ctrl_t c) { return c == ctrl_t::kDeleted; }
 inline bool IsEmptyOrDeleted(ctrl_t c) { return c < ctrl_t::kSentinel; }
 
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
+#ifdef ABSL_INTERNAL_HAVE_SSE2
+// Quick reference guide for intrinsics used below:
+//
+// * __m128i: An XMM (128-bit) word.
+//
+// * _mm_setzero_si128: Returns a zero vector.
+// * _mm_set1_epi8:     Returns a vector with the same i8 in each lane.
+//
+// * _mm_subs_epi8:    Saturating-subtracts two i8 vectors.
+// * _mm_and_si128:    Ands two i128s together.
+// * _mm_or_si128:     Ors two i128s together.
+// * _mm_andnot_si128: And-nots two i128s together.
+//
+// * _mm_cmpeq_epi8: Component-wise compares two i8 vectors for equality,
+//                   filling each lane with 0x00 or 0xff.
+// * _mm_cmpgt_epi8: Same as above, but using > rather than ==.
+//
+// * _mm_loadu_si128:  Performs an unaligned load of an i128.
+// * _mm_storeu_si128: Performs an unaligned store of an i128.
+//
+// * _mm_sign_epi8:     Retains, negates, or zeroes each i8 lane of the first
+//                      argument if the corresponding lane of the second
+//                      argument is positive, negative, or zero, respectively.
+// * _mm_movemask_epi8: Selects the sign bit out of each i8 lane and produces a
+//                      bitmask consisting of those bits.
+// * _mm_shuffle_epi8:  Selects i8s from the first argument, using the low
+//                      four bits of each i8 lane in the second argument as
+//                      indices.
 
 // https://github.com/abseil/abseil-cpp/issues/209
 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87853
@@ -358,32 +545,34 @@ struct GroupSse2Impl {
 
   // Returns a bitmask representing the positions of slots that match hash.
   BitMask<uint32_t, kWidth> Match(h2_t hash) const {
-    auto match = _mm_set1_epi8(hash);
+    auto match = _mm_set1_epi8(static_cast<char>(hash));
     return BitMask<uint32_t, kWidth>(
-        _mm_movemask_epi8(_mm_cmpeq_epi8(match, ctrl)));
+        static_cast<uint32_t>(_mm_movemask_epi8(_mm_cmpeq_epi8(match, ctrl))));
   }
 
   // Returns a bitmask representing the positions of empty slots.
-  BitMask<uint32_t, kWidth> MatchEmpty() const {
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
+  NonIterableBitMask<uint32_t, kWidth> MaskEmpty() const {
+#ifdef ABSL_INTERNAL_HAVE_SSSE3
     // This only works because ctrl_t::kEmpty is -128.
-    return BitMask<uint32_t, kWidth>(
-        _mm_movemask_epi8(_mm_sign_epi8(ctrl, ctrl)));
+    return NonIterableBitMask<uint32_t, kWidth>(
+        static_cast<uint32_t>(_mm_movemask_epi8(_mm_sign_epi8(ctrl, ctrl))));
 #else
-    return Match(static_cast<h2_t>(ctrl_t::kEmpty));
+    auto match = _mm_set1_epi8(static_cast<char>(ctrl_t::kEmpty));
+    return NonIterableBitMask<uint32_t, kWidth>(
+        static_cast<uint32_t>(_mm_movemask_epi8(_mm_cmpeq_epi8(match, ctrl))));
 #endif
   }
 
   // Returns a bitmask representing the positions of empty or deleted slots.
-  BitMask<uint32_t, kWidth> MatchEmptyOrDeleted() const {
-    auto special = _mm_set1_epi8(static_cast<int8_t>(ctrl_t::kSentinel));
-    return BitMask<uint32_t, kWidth>(
-        _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl)));
+  NonIterableBitMask<uint32_t, kWidth> MaskEmptyOrDeleted() const {
+    auto special = _mm_set1_epi8(static_cast<char>(ctrl_t::kSentinel));
+    return NonIterableBitMask<uint32_t, kWidth>(static_cast<uint32_t>(
+        _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl))));
   }
 
   // Returns the number of trailing empty or deleted elements in the group.
   uint32_t CountLeadingEmptyOrDeleted() const {
-    auto special = _mm_set1_epi8(static_cast<int8_t>(ctrl_t::kSentinel));
+    auto special = _mm_set1_epi8(static_cast<char>(ctrl_t::kSentinel));
     return TrailingZeros(static_cast<uint32_t>(
         _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl)) + 1));
   }
@@ -391,7 +580,7 @@ struct GroupSse2Impl {
   void ConvertSpecialToEmptyAndFullToDeleted(ctrl_t* dst) const {
     auto msbs = _mm_set1_epi8(static_cast<char>(-128));
     auto x126 = _mm_set1_epi8(126);
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
+#ifdef ABSL_INTERNAL_HAVE_SSSE3
     auto res = _mm_or_si128(_mm_shuffle_epi8(x126, ctrl), msbs);
 #else
     auto zero = _mm_setzero_si128();
@@ -405,6 +594,64 @@ struct GroupSse2Impl {
 };
 #endif  // ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
 
+#if defined(ABSL_INTERNAL_HAVE_ARM_NEON) && defined(ABSL_IS_LITTLE_ENDIAN)
+struct GroupAArch64Impl {
+  static constexpr size_t kWidth = 8;
+
+  explicit GroupAArch64Impl(const ctrl_t* pos) {
+    ctrl = vld1_u8(reinterpret_cast<const uint8_t*>(pos));
+  }
+
+  BitMask<uint64_t, kWidth, 3> Match(h2_t hash) const {
+    uint8x8_t dup = vdup_n_u8(hash);
+    auto mask = vceq_u8(ctrl, dup);
+    constexpr uint64_t msbs = 0x8080808080808080ULL;
+    return BitMask<uint64_t, kWidth, 3>(
+        vget_lane_u64(vreinterpret_u64_u8(mask), 0) & msbs);
+  }
+
+  NonIterableBitMask<uint64_t, kWidth, 3> MaskEmpty() const {
+    uint64_t mask =
+        vget_lane_u64(vreinterpret_u64_u8(vceq_s8(
+                          vdup_n_s8(static_cast<int8_t>(ctrl_t::kEmpty)),
+                          vreinterpret_s8_u8(ctrl))),
+                      0);
+    return NonIterableBitMask<uint64_t, kWidth, 3>(mask);
+  }
+
+  NonIterableBitMask<uint64_t, kWidth, 3> MaskEmptyOrDeleted() const {
+    uint64_t mask =
+        vget_lane_u64(vreinterpret_u64_u8(vcgt_s8(
+                          vdup_n_s8(static_cast<int8_t>(ctrl_t::kSentinel)),
+                          vreinterpret_s8_u8(ctrl))),
+                      0);
+    return NonIterableBitMask<uint64_t, kWidth, 3>(mask);
+  }
+
+  uint32_t CountLeadingEmptyOrDeleted() const {
+    uint64_t mask = vget_lane_u64(vreinterpret_u64_u8(ctrl), 0);
+    // ctrl | ~(ctrl >> 7) will have the lowest bit set to zero for kEmpty and
+    // kDeleted. We lower all other bits and count number of trailing zeros.
+    // Clang and GCC optimize countr_zero to rbit+clz without any check for 0,
+    // so we should be fine.
+    constexpr uint64_t bits = 0x0101010101010101ULL;
+    return static_cast<uint32_t>(countr_zero((mask | ~(mask >> 7)) & bits) >>
+                                 3);
+  }
+
+  void ConvertSpecialToEmptyAndFullToDeleted(ctrl_t* dst) const {
+    uint64_t mask = vget_lane_u64(vreinterpret_u64_u8(ctrl), 0);
+    constexpr uint64_t msbs = 0x8080808080808080ULL;
+    constexpr uint64_t lsbs = 0x0101010101010101ULL;
+    auto x = mask & msbs;
+    auto res = (~x + (x >> 7)) & ~lsbs;
+    little_endian::Store64(dst, res);
+  }
+
+  uint8x8_t ctrl;
+};
+#endif  // ABSL_INTERNAL_HAVE_ARM_NEON && ABSL_IS_LITTLE_ENDIAN
+
 struct GroupPortableImpl {
   static constexpr size_t kWidth = 8;
 
@@ -431,19 +678,24 @@ struct GroupPortableImpl {
     return BitMask<uint64_t, kWidth, 3>((x - lsbs) & ~x & msbs);
   }
 
-  BitMask<uint64_t, kWidth, 3> MatchEmpty() const {
+  NonIterableBitMask<uint64_t, kWidth, 3> MaskEmpty() const {
     constexpr uint64_t msbs = 0x8080808080808080ULL;
-    return BitMask<uint64_t, kWidth, 3>((ctrl & (~ctrl << 6)) & msbs);
+    return NonIterableBitMask<uint64_t, kWidth, 3>((ctrl & (~ctrl << 6)) &
+                                                   msbs);
   }
 
-  BitMask<uint64_t, kWidth, 3> MatchEmptyOrDeleted() const {
+  NonIterableBitMask<uint64_t, kWidth, 3> MaskEmptyOrDeleted() const {
     constexpr uint64_t msbs = 0x8080808080808080ULL;
-    return BitMask<uint64_t, kWidth, 3>((ctrl & (~ctrl << 7)) & msbs);
+    return NonIterableBitMask<uint64_t, kWidth, 3>((ctrl & (~ctrl << 7)) &
+                                                   msbs);
   }
 
   uint32_t CountLeadingEmptyOrDeleted() const {
-    constexpr uint64_t gaps = 0x00FEFEFEFEFEFEFEULL;
-    return (TrailingZeros(((~ctrl & (ctrl >> 7)) | gaps) + 1) + 7) >> 3;
+    // ctrl | ~(ctrl >> 7) will have the lowest bit set to zero for kEmpty and
+    // kDeleted. We lower all other bits and count number of trailing zeros.
+    constexpr uint64_t bits = 0x0101010101010101ULL;
+    return static_cast<uint32_t>(countr_zero((ctrl | ~(ctrl >> 7)) & bits) >>
+                                 3);
   }
 
   void ConvertSpecialToEmptyAndFullToDeleted(ctrl_t* dst) const {
@@ -457,32 +709,40 @@ struct GroupPortableImpl {
   uint64_t ctrl;
 };
 
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
+#ifdef ABSL_INTERNAL_HAVE_SSE2
 using Group = GroupSse2Impl;
+#elif defined(ABSL_INTERNAL_HAVE_ARM_NEON) && defined(ABSL_IS_LITTLE_ENDIAN)
+using Group = GroupAArch64Impl;
 #else
 using Group = GroupPortableImpl;
 #endif
 
-// The number of cloned control bytes that we copy from the beginning to the
-// end of the control bytes array.
+// Returns he number of "cloned control bytes".
+//
+// This is the number of control bytes that are present both at the beginning
+// of the control byte array and at the end, such that we can create a
+// `Group::kWidth`-width probe window starting from any control byte.
 constexpr size_t NumClonedBytes() { return Group::kWidth - 1; }
 
 template <class Policy, class Hash, class Eq, class Alloc>
 class raw_hash_set;
 
+// Returns whether `n` is a valid capacity (i.e., number of slots).
+//
+// A valid capacity is a non-zero integer `2^m - 1`.
 inline bool IsValidCapacity(size_t n) { return ((n + 1) & n) == 0 && n > 0; }
 
+// Applies the following mapping to every byte in the control array:
+//   * kDeleted -> kEmpty
+//   * kEmpty -> kEmpty
+//   * _ -> kDeleted
 // PRECONDITION:
 //   IsValidCapacity(capacity)
 //   ctrl[capacity] == ctrl_t::kSentinel
 //   ctrl[i] != ctrl_t::kSentinel for all i < capacity
-// Applies mapping for every byte in ctrl:
-//   DELETED -> EMPTY
-//   EMPTY -> EMPTY
-//   FULL -> DELETED
 void ConvertDeletedToEmptyAndFullToDeleted(ctrl_t* ctrl, size_t capacity);
 
-// Rounds up the capacity to the next power of 2 minus 1, with a minimum of 1.
+// Converts `n` into the next valid capacity, per `IsValidCapacity`.
 inline size_t NormalizeCapacity(size_t n) {
   return n ? ~size_t{} >> countl_zero(n) : 1;
 }
@@ -495,8 +755,8 @@ inline size_t NormalizeCapacity(size_t n) {
 //   never need to probe (the whole table fits in one group) so we don't need a
 //   load factor less than 1.
 
-// Given `capacity` of the table, returns the size (i.e. number of full slots)
-// at which we should grow the capacity.
+// Given `capacity`, applies the load factor; i.e., it returns the maximum
+// number of values we should put into the table before a resizing rehash.
 inline size_t CapacityToGrowth(size_t capacity) {
   assert(IsValidCapacity(capacity));
   // `capacity*7/8`
@@ -506,8 +766,12 @@ inline size_t CapacityToGrowth(size_t capacity) {
   }
   return capacity - capacity / 8;
 }
-// From desired "growth" to a lowerbound of the necessary capacity.
-// Might not be a valid one and requires NormalizeCapacity().
+
+// Given `growth`, "unapplies" the load factor to find how large the capacity
+// should be to stay within the load factor.
+//
+// This might not be a valid capacity and `NormalizeCapacity()` should be
+// called on this.
 inline size_t GrowthToLowerboundCapacity(size_t growth) {
   // `growth*8/7`
   if (Group::kWidth == 8 && growth == 7) {
@@ -533,16 +797,22 @@ size_t SelectBucketCountForIterRange(InputIter first, InputIter last,
   return 0;
 }
 
-inline void AssertIsFull(ctrl_t* ctrl) {
-  ABSL_HARDENING_ASSERT((ctrl != nullptr && IsFull(*ctrl)) &&
-                        "Invalid operation on iterator. The element might have "
-                        "been erased, or the table might have rehashed.");
-}
+#define ABSL_INTERNAL_ASSERT_IS_FULL(ctrl, operation)                         \
+  do {                                                                        \
+    ABSL_HARDENING_ASSERT(                                                    \
+        (ctrl != nullptr) && operation                                        \
+        " called on invalid iterator. The iterator might be an end() "        \
+        "iterator or may have been default constructed.");                    \
+    ABSL_HARDENING_ASSERT(                                                    \
+        (IsFull(*ctrl)) && operation                                          \
+        " called on invalid iterator. The element might have been erased or " \
+        "the table might have rehashed.");                                    \
+  } while (0)
 
 inline void AssertIsValid(ctrl_t* ctrl) {
   ABSL_HARDENING_ASSERT((ctrl == nullptr || IsFull(*ctrl)) &&
                         "Invalid operation on iterator. The element might have "
-                        "been erased, or the table might have rehashed.");
+                        "been erased or the table might have rehashed.");
 }
 
 struct FindInfo {
@@ -550,44 +820,40 @@ struct FindInfo {
   size_t probe_length;
 };
 
-// The representation of the object has two modes:
-//  - small: For capacities < kWidth-1
-//  - large: For the rest.
+// Whether a table is "small". A small table fits entirely into a probing
+// group, i.e., has a capacity < `Group::kWidth`.
 //
-// Differences:
-//  - In small mode we are able to use the whole capacity. The extra control
-//  bytes give us at least one "empty" control byte to stop the iteration.
-//  This is important to make 1 a valid capacity.
+// In small mode we are able to use the whole capacity. The extra control
+// bytes give us at least one "empty" control byte to stop the iteration.
+// This is important to make 1 a valid capacity.
 //
-//  - In small mode only the first `capacity()` control bytes after the
-//  sentinel are valid. The rest contain dummy ctrl_t::kEmpty values that do not
-//  represent a real slot. This is important to take into account on
-//  find_first_non_full(), where we never try ShouldInsertBackwards() for
-//  small tables.
+// In small mode only the first `capacity` control bytes after the sentinel
+// are valid. The rest contain dummy ctrl_t::kEmpty values that do not
+// represent a real slot. This is important to take into account on
+// `find_first_non_full()`, where we never try
+// `ShouldInsertBackwards()` for small tables.
 inline bool is_small(size_t capacity) { return capacity < Group::kWidth - 1; }
 
+// Begins a probing operation on `ctrl`, using `hash`.
 inline probe_seq<Group::kWidth> probe(const ctrl_t* ctrl, size_t hash,
                                       size_t capacity) {
   return probe_seq<Group::kWidth>(H1(hash, ctrl), capacity);
 }
 
-// Probes the raw_hash_set with the probe sequence for hash and returns the
-// pointer to the first empty or deleted slot.
-// NOTE: this function must work with tables having both ctrl_t::kEmpty and
-// ctrl_t::kDeleted in one group. Such tables appears during
-// drop_deletes_without_resize.
+// Probes an array of control bits using a probe sequence derived from `hash`,
+// and returns the offset corresponding to the first deleted or empty slot.
 //
-// This function is very useful when insertions happen and:
-// - the input is already a set
-// - there are enough slots
-// - the element with the hash is not in the table
+// Behavior when the entire table is full is undefined.
+//
+// NOTE: this function must work with tables having both empty and deleted
+// slots in the same group. Such tables appear during `erase()`.
 template <typename = void>
 inline FindInfo find_first_non_full(const ctrl_t* ctrl, size_t hash,
                                     size_t capacity) {
   auto seq = probe(ctrl, hash, capacity);
   while (true) {
     Group g{ctrl + seq.offset()};
-    auto mask = g.MatchEmptyOrDeleted();
+    auto mask = g.MaskEmptyOrDeleted();
     if (mask) {
 #if !defined(NDEBUG)
       // We want to add entropy even when ASLR is not enabled.
@@ -610,7 +876,8 @@ inline FindInfo find_first_non_full(const ctrl_t* ctrl, size_t hash,
 // corresponding translation unit.
 extern template FindInfo find_first_non_full(const ctrl_t*, size_t, size_t);
 
-// Reset all ctrl bytes back to ctrl_t::kEmpty, except the sentinel.
+// Sets `ctrl` to `{kEmpty, kSentinel, ..., kEmpty}`, marking the entire
+// array as marked as empty.
 inline void ResetCtrl(size_t capacity, ctrl_t* ctrl, const void* slot,
                       size_t slot_size) {
   std::memset(ctrl, static_cast<int8_t>(ctrl_t::kEmpty),
@@ -619,8 +886,10 @@ inline void ResetCtrl(size_t capacity, ctrl_t* ctrl, const void* slot,
   SanitizerPoisonMemoryRegion(slot, slot_size * capacity);
 }
 
-// Sets the control byte, and if `i < NumClonedBytes()`, set the cloned byte
-// at the end too.
+// Sets `ctrl[i]` to `h`.
+//
+// Unlike setting it directly, this function will perform bounds checks and
+// mirror the value to the cloned tail if necessary.
 inline void SetCtrl(size_t i, ctrl_t h, size_t capacity, ctrl_t* ctrl,
                     const void* slot, size_t slot_size) {
   assert(i < capacity);
@@ -636,25 +905,28 @@ inline void SetCtrl(size_t i, ctrl_t h, size_t capacity, ctrl_t* ctrl,
   ctrl[((i - NumClonedBytes()) & capacity) + (NumClonedBytes() & capacity)] = h;
 }
 
+// Overload for setting to an occupied `h2_t` rather than a special `ctrl_t`.
 inline void SetCtrl(size_t i, h2_t h, size_t capacity, ctrl_t* ctrl,
                     const void* slot, size_t slot_size) {
   SetCtrl(i, static_cast<ctrl_t>(h), capacity, ctrl, slot, slot_size);
 }
 
-// The allocated block consists of `capacity + 1 + NumClonedBytes()` control
-// bytes followed by `capacity` slots, which must be aligned to `slot_align`.
-// SlotOffset returns the offset of the slots into the allocated block.
+// Given the capacity of a table, computes the offset (from the start of the
+// backing allocation) at which the slots begin.
 inline size_t SlotOffset(size_t capacity, size_t slot_align) {
   assert(IsValidCapacity(capacity));
   const size_t num_control_bytes = capacity + 1 + NumClonedBytes();
   return (num_control_bytes + slot_align - 1) & (~slot_align + 1);
 }
 
-// Returns the size of the allocated block. See also above comment.
+// Given the capacity of a table, computes the total size of the backing
+// array.
 inline size_t AllocSize(size_t capacity, size_t slot_size, size_t slot_align) {
   return SlotOffset(capacity, slot_align) + capacity * slot_size;
 }
 
+// A SwissTable.
+//
 // Policy: a policy defines how to perform different operations on
 // the slots of the hashtable (see hash_policy_traits.h for the full interface
 // of policy).
@@ -769,16 +1041,19 @@ class raw_hash_set {
 
     // PRECONDITION: not an end() iterator.
     reference operator*() const {
-      AssertIsFull(ctrl_);
+      ABSL_INTERNAL_ASSERT_IS_FULL(ctrl_, "operator*()");
       return PolicyTraits::element(slot_);
     }
 
     // PRECONDITION: not an end() iterator.
-    pointer operator->() const { return &operator*(); }
+    pointer operator->() const {
+      ABSL_INTERNAL_ASSERT_IS_FULL(ctrl_, "operator->");
+      return &operator*();
+    }
 
     // PRECONDITION: not an end() iterator.
     iterator& operator++() {
-      AssertIsFull(ctrl_);
+      ABSL_INTERNAL_ASSERT_IS_FULL(ctrl_, "operator++");
       ++ctrl_;
       ++slot_;
       skip_empty_or_deleted();
@@ -804,9 +1079,13 @@ class raw_hash_set {
     iterator(ctrl_t* ctrl, slot_type* slot) : ctrl_(ctrl), slot_(slot) {
       // This assumption helps the compiler know that any non-end iterator is
       // not equal to any end iterator.
-      ABSL_INTERNAL_ASSUME(ctrl != nullptr);
+      ABSL_ASSUME(ctrl != nullptr);
     }
 
+    // Fixes up `ctrl_` to point to a full by advancing it and `slot_` until
+    // they reach one.
+    //
+    // If a sentinel is reached, we null `ctrl_` out instead.
     void skip_empty_or_deleted() {
       while (IsEmptyOrDeleted(*ctrl_)) {
         uint32_t shift = Group{ctrl_}.CountLeadingEmptyOrDeleted();
@@ -869,11 +1148,12 @@ class raw_hash_set {
           std::is_nothrow_default_constructible<key_equal>::value&&
               std::is_nothrow_default_constructible<allocator_type>::value) {}
 
-  explicit raw_hash_set(size_t bucket_count, const hasher& hash = hasher(),
+  explicit raw_hash_set(size_t bucket_count,
+                        const hasher& hash = hasher(),
                         const key_equal& eq = key_equal(),
                         const allocator_type& alloc = allocator_type())
       : ctrl_(EmptyGroup()),
-        settings_(0, HashtablezInfoHandle(), hash, eq, alloc) {
+        settings_(0u, HashtablezInfoHandle(), hash, eq, alloc) {
     if (bucket_count) {
       capacity_ = NormalizeCapacity(bucket_count);
       initialize_slots();
@@ -998,14 +1278,16 @@ class raw_hash_set {
               std::is_nothrow_copy_constructible<allocator_type>::value)
       : ctrl_(absl::exchange(that.ctrl_, EmptyGroup())),
         slots_(absl::exchange(that.slots_, nullptr)),
-        size_(absl::exchange(that.size_, 0)),
-        capacity_(absl::exchange(that.capacity_, 0)),
+        size_(absl::exchange(that.size_, size_t{0})),
+        capacity_(absl::exchange(that.capacity_, size_t{0})),
         // Hash, equality and allocator are copied instead of moved because
         // `that` must be left valid. If Hash is std::function<Key>, moving it
         // would create a nullptr functor that cannot be called.
-        settings_(absl::exchange(that.growth_left(), 0),
+        settings_(absl::exchange(that.growth_left(), size_t{0}),
                   absl::exchange(that.infoz(), HashtablezInfoHandle()),
-                  that.hash_ref(), that.eq_ref(), that.alloc_ref()) {}
+                  that.hash_ref(),
+                  that.eq_ref(),
+                  that.alloc_ref()) {}
 
   raw_hash_set(raw_hash_set&& that, const allocator_type& a)
       : ctrl_(EmptyGroup()),
@@ -1103,8 +1385,7 @@ class raw_hash_set {
   //   m.insert(std::make_pair("abc", 42));
   // TODO(cheshire): A type alias T2 is introduced as a workaround for the nvcc
   // bug.
-  template <class T, RequiresInsertable<T> = 0,
-            class T2 = T,
+  template <class T, RequiresInsertable<T> = 0, class T2 = T,
             typename std::enable_if<IsDecomposable<T2>::value, int>::type = 0,
             T* = nullptr>
   std::pair<iterator, bool> insert(T&& value) {
@@ -1324,7 +1605,7 @@ class raw_hash_set {
   // This overload is necessary because otherwise erase<K>(const K&) would be
   // a better match if non-const iterator is passed as an argument.
   void erase(iterator it) {
-    AssertIsFull(it.ctrl_);
+    ABSL_INTERNAL_ASSERT_IS_FULL(it.ctrl_, "erase()");
     PolicyTraits::destroy(&alloc_ref(), it.slot_);
     erase_meta_only(it);
   }
@@ -1358,7 +1639,7 @@ class raw_hash_set {
   }
 
   node_type extract(const_iterator position) {
-    AssertIsFull(position.inner_.ctrl_);
+    ABSL_INTERNAL_ASSERT_IS_FULL(position.inner_.ctrl_, "extract()");
     auto node =
         CommonAccess::Transfer<node_type>(alloc_ref(), position.inner_.slot_);
     erase_meta_only(position);
@@ -1445,12 +1726,13 @@ class raw_hash_set {
   template <class K = key_type>
   void prefetch(const key_arg<K>& key) const {
     (void)key;
-#if defined(__GNUC__)
+    // Avoid probing if we won't be able to prefetch the addresses received.
+#ifdef ABSL_INTERNAL_HAVE_PREFETCH
     prefetch_heap_block();
     auto seq = probe(ctrl_, hash_ref()(key), capacity_);
-    __builtin_prefetch(static_cast<const void*>(ctrl_ + seq.offset()));
-    __builtin_prefetch(static_cast<const void*>(slots_ + seq.offset()));
-#endif  // __GNUC__
+    base_internal::PrefetchT0(ctrl_ + seq.offset());
+    base_internal::PrefetchT0(slots_ + seq.offset());
+#endif  // ABSL_INTERNAL_HAVE_PREFETCH
   }
 
   // The API of find() has two extensions.
@@ -1465,13 +1747,13 @@ class raw_hash_set {
     auto seq = probe(ctrl_, hash, capacity_);
     while (true) {
       Group g{ctrl_ + seq.offset()};
-      for (int i : g.Match(H2(hash))) {
+      for (uint32_t i : g.Match(H2(hash))) {
         if (ABSL_PREDICT_TRUE(PolicyTraits::apply(
                 EqualElement<K>{key, eq_ref()},
                 PolicyTraits::element(slots_ + seq.offset(i)))))
           return iterator_at(seq.offset(i));
       }
-      if (ABSL_PREDICT_TRUE(g.MatchEmpty())) return end();
+      if (ABSL_PREDICT_TRUE(g.MaskEmpty())) return end();
       seq.next();
       assert(seq.index() <= capacity_ && "full table!");
     }
@@ -1538,6 +1820,14 @@ class raw_hash_set {
     return !(a == b);
   }
 
+  template <typename H>
+  friend typename std::enable_if<H::template is_hashable<value_type>::value,
+                                 H>::type
+  AbslHashValue(H h, const raw_hash_set& s) {
+    return H::combine(H::combine_unordered(std::move(h), s.begin(), s.end()),
+                      s.size());
+  }
+
   friend void swap(raw_hash_set& a,
                    raw_hash_set& b) noexcept(noexcept(a.swap(b))) {
     a.swap(b);
@@ -1603,17 +1893,17 @@ class raw_hash_set {
     slot_type&& slot;
   };
 
-  // "erases" the object from the container, except that it doesn't actually
-  // destroy the object. It only updates all the metadata of the class.
-  // This can be used in conjunction with Policy::transfer to move the object to
-  // another place.
+  // Erases, but does not destroy, the value pointed to by `it`.
+  //
+  // This merely updates the pertinent control byte. This can be used in
+  // conjunction with Policy::transfer to move the object to another place.
   void erase_meta_only(const_iterator it) {
     assert(IsFull(*it.inner_.ctrl_) && "erasing a dangling iterator");
     --size_;
-    const size_t index = it.inner_.ctrl_ - ctrl_;
+    const size_t index = static_cast<size_t>(it.inner_.ctrl_ - ctrl_);
     const size_t index_before = (index - Group::kWidth) & capacity_;
-    const auto empty_after = Group(it.inner_.ctrl_).MatchEmpty();
-    const auto empty_before = Group(ctrl_ + index_before).MatchEmpty();
+    const auto empty_after = Group(it.inner_.ctrl_).MaskEmpty();
+    const auto empty_before = Group(ctrl_ + index_before).MaskEmpty();
 
     // We count how many consecutive non empties we have to the right and to the
     // left of `it`. If the sum is >= kWidth then there is at least one probe
@@ -1629,6 +1919,11 @@ class raw_hash_set {
     infoz().RecordErase();
   }
 
+  // Allocates a backing array for `self` and initializes its control bytes.
+  // This reads `capacity_` and updates all other fields based on the result of
+  // the allocation.
+  //
+  // This does not free the currently held array; `capacity_` must be nonzero.
   void initialize_slots() {
     assert(capacity_);
     // Folks with custom allocators often make unwarranted assumptions about the
@@ -1657,6 +1952,10 @@ class raw_hash_set {
     infoz().RecordStorageChanged(size_, capacity_);
   }
 
+  // Destroys all slots in the backing array, frees the backing array, and
+  // clears all top-level book-keeping data.
+  //
+  // This essentially implements `map = raw_hash_set();`.
   void destroy_slots() {
     if (!capacity_) return;
     for (size_t i = 0; i != capacity_; ++i) {
@@ -1707,6 +2006,9 @@ class raw_hash_set {
     infoz().RecordRehash(total_probe_length);
   }
 
+  // Prunes control bytes to remove as many tombstones as possible.
+  //
+  // See the comment on `rehash_and_grow_if_necessary()`.
   void drop_deletes_without_resize() ABSL_ATTRIBUTE_NOINLINE {
     assert(IsValidCapacity(capacity_));
     assert(!is_small(capacity_));
@@ -1773,6 +2075,11 @@ class raw_hash_set {
     infoz().RecordRehash(total_probe_length);
   }
 
+  // Called whenever the table *might* need to conditionally grow.
+  //
+  // This function is an optimization opportunity to perform a rehash even when
+  // growth is unnecessary, because vacating tombstones is beneficial for
+  // performance in the long-run.
   void rehash_and_grow_if_necessary() {
     if (capacity_ == 0) {
       resize(1);
@@ -1832,12 +2139,12 @@ class raw_hash_set {
     auto seq = probe(ctrl_, hash, capacity_);
     while (true) {
       Group g{ctrl_ + seq.offset()};
-      for (int i : g.Match(H2(hash))) {
+      for (uint32_t i : g.Match(H2(hash))) {
         if (ABSL_PREDICT_TRUE(PolicyTraits::element(slots_ + seq.offset(i)) ==
                               elem))
           return true;
       }
-      if (ABSL_PREDICT_TRUE(g.MatchEmpty())) return false;
+      if (ABSL_PREDICT_TRUE(g.MaskEmpty())) return false;
       seq.next();
       assert(seq.index() <= capacity_ && "full table!");
     }
@@ -1857,6 +2164,9 @@ class raw_hash_set {
   }
 
  protected:
+  // Attempts to find `key` in the table; if it isn't found, returns a slot that
+  // the value can be inserted into, with the control byte already set to
+  // `key`'s H2.
   template <class K>
   std::pair<size_t, bool> find_or_prepare_insert(const K& key) {
     prefetch_heap_block();
@@ -1864,19 +2174,23 @@ class raw_hash_set {
     auto seq = probe(ctrl_, hash, capacity_);
     while (true) {
       Group g{ctrl_ + seq.offset()};
-      for (int i : g.Match(H2(hash))) {
+      for (uint32_t i : g.Match(H2(hash))) {
         if (ABSL_PREDICT_TRUE(PolicyTraits::apply(
                 EqualElement<K>{key, eq_ref()},
                 PolicyTraits::element(slots_ + seq.offset(i)))))
           return {seq.offset(i), false};
       }
-      if (ABSL_PREDICT_TRUE(g.MatchEmpty())) break;
+      if (ABSL_PREDICT_TRUE(g.MaskEmpty())) break;
       seq.next();
       assert(seq.index() <= capacity_ && "full table!");
     }
     return {prepare_insert(hash), true};
   }
 
+  // Given the hash of a value not currently in the table, finds the next
+  // viable slot index to insert it at.
+  //
+  // REQUIRES: At least one non-full slot available.
   size_t prepare_insert(size_t hash) ABSL_ATTRIBUTE_NOINLINE {
     auto target = find_first_non_full(ctrl_, hash, capacity_);
     if (ABSL_PREDICT_FALSE(growth_left() == 0 &&
@@ -1920,15 +2234,23 @@ class raw_hash_set {
     growth_left() = CapacityToGrowth(capacity()) - size_;
   }
 
+  // The number of slots we can still fill without needing to rehash.
+  //
+  // This is stored separately due to tombstones: we do not include tombstones
+  // in the growth capacity, because we'd like to rehash when the table is
+  // otherwise filled with tombstones: otherwise, probe sequences might get
+  // unacceptably long without triggering a rehash. Callers can also force a
+  // rehash via the standard `rehash(0)`, which will recompute this value as a
+  // side-effect.
+  //
+  // See `CapacityToGrowth()`.
   size_t& growth_left() { return settings_.template get<0>(); }
 
+  // Prefetch the heap-allocated memory region to resolve potential TLB misses.
+  // This is intended to overlap with execution of calculating the hash for a
+  // key.
   void prefetch_heap_block() const {
-    // Prefetch the heap-allocated memory region to resolve potential TLB
-    // misses.  This is intended to overlap with execution of calculating the
-    // hash for a key.
-#if defined(__GNUC__)
-    __builtin_prefetch(static_cast<const void*>(ctrl_), 0, 1);
-#endif  // __GNUC__
+    base_internal::PrefetchT2(ctrl_);
   }
 
   HashtablezInfoHandle& infoz() { return settings_.template get<1>(); }
@@ -1945,20 +2267,33 @@ class raw_hash_set {
   // TODO(alkis): Investigate removing some of these fields:
   // - ctrl/slots can be derived from each other
   // - size can be moved into the slot array
-  ctrl_t* ctrl_ = EmptyGroup();  // [(capacity + 1 + NumClonedBytes()) * ctrl_t]
-  slot_type* slots_ = nullptr;   // [capacity * slot_type]
-  size_t size_ = 0;              // number of full slots
-  size_t capacity_ = 0;          // total number of slots
+
+  // The control bytes (and, also, a pointer to the base of the backing array).
+  //
+  // This contains `capacity_ + 1 + NumClonedBytes()` entries, even
+  // when the table is empty (hence EmptyGroup).
+  ctrl_t* ctrl_ = EmptyGroup();
+  // The beginning of the slots, located at `SlotOffset()` bytes after
+  // `ctrl_`. May be null for empty tables.
+  slot_type* slots_ = nullptr;
+
+  // The number of filled slots.
+  size_t size_ = 0;
+
+  // The total number of available slots.
+  size_t capacity_ = 0;
   absl::container_internal::CompressedTuple<size_t /* growth_left */,
                                             HashtablezInfoHandle, hasher,
                                             key_equal, allocator_type>
-      settings_{0, HashtablezInfoHandle{}, hasher{}, key_equal{},
+      settings_{0u, HashtablezInfoHandle{}, hasher{}, key_equal{},
                 allocator_type{}};
 };
 
 // Erases all elements that satisfy the predicate `pred` from the container `c`.
 template <typename P, typename H, typename E, typename A, typename Predicate>
-void EraseIf(Predicate& pred, raw_hash_set<P, H, E, A>* c) {
+typename raw_hash_set<P, H, E, A>::size_type EraseIf(
+    Predicate& pred, raw_hash_set<P, H, E, A>* c) {
+  const auto initial_size = c->size();
   for (auto it = c->begin(), last = c->end(); it != last;) {
     if (pred(*it)) {
       c->erase(it++);
@@ -1966,6 +2301,7 @@ void EraseIf(Predicate& pred, raw_hash_set<P, H, E, A>* c) {
       ++it;
     }
   }
+  return initial_size - c->size();
 }
 
 namespace hashtable_debug_internal {
@@ -1981,7 +2317,7 @@ struct HashtableDebugAccess<Set, absl::void_t<typename Set::raw_hash_set>> {
     auto seq = probe(set.ctrl_, hash, set.capacity_);
     while (true) {
       container_internal::Group g{set.ctrl_ + seq.offset()};
-      for (int i : g.Match(container_internal::H2(hash))) {
+      for (uint32_t i : g.Match(container_internal::H2(hash))) {
         if (Traits::apply(
                 typename Set::template EqualElement<typename Set::key_type>{
                     key, set.eq_ref()},
@@ -1989,7 +2325,7 @@ struct HashtableDebugAccess<Set, absl::void_t<typename Set::raw_hash_set>> {
           return num_probes;
         ++num_probes;
       }
-      if (g.MatchEmpty()) return num_probes;
+      if (g.MaskEmpty()) return num_probes;
       seq.next();
       ++num_probes;
     }
@@ -2031,4 +2367,6 @@ struct HashtableDebugAccess<Set, absl::void_t<typename Set::raw_hash_set>> {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
+#undef ABSL_INTERNAL_ASSERT_IS_FULL
+
 #endif  // ABSL_CONTAINER_INTERNAL_RAW_HASH_SET_H_
diff --git a/third_party/abseil-cpp/absl/container/internal/raw_hash_set_benchmark.cc b/third_party/abseil-cpp/absl/container/internal/raw_hash_set_benchmark.cc
index c886d3ad43..e17ba9b43f 100644
--- a/third_party/abseil-cpp/absl/container/internal/raw_hash_set_benchmark.cc
+++ b/third_party/abseil-cpp/absl/container/internal/raw_hash_set_benchmark.cc
@@ -12,13 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "absl/container/internal/raw_hash_set.h"
-
+#include <array>
+#include <cmath>
 #include <numeric>
 #include <random>
+#include <utility>
+#include <vector>
 
 #include "absl/base/internal/raw_logging.h"
 #include "absl/container/internal/hash_function_defaults.h"
+#include "absl/container/internal/raw_hash_set.h"
 #include "absl/strings/str_format.h"
 #include "benchmark/benchmark.h"
 
@@ -202,40 +205,113 @@ void CacheInSteadyStateArgs(Benchmark* bm) {
 BENCHMARK(BM_CacheInSteadyState)->Apply(CacheInSteadyStateArgs);
 
 void BM_EndComparison(benchmark::State& state) {
+  StringTable t = {{"a", "a"}, {"b", "b"}};
+  auto it = t.begin();
+  for (auto i : state) {
+    benchmark::DoNotOptimize(t);
+    benchmark::DoNotOptimize(it);
+    benchmark::DoNotOptimize(it != t.end());
+  }
+}
+BENCHMARK(BM_EndComparison);
+
+void BM_Iteration(benchmark::State& state) {
   std::random_device rd;
   std::mt19937 rng(rd());
   string_generator gen{12};
   StringTable t;
-  while (t.size() < state.range(0)) {
+
+  size_t capacity = state.range(0);
+  size_t size = state.range(1);
+  t.reserve(capacity);
+
+  while (t.size() < size) {
     t.emplace(gen(rng), gen(rng));
   }
 
-  for (auto _ : state) {
+  for (auto i : state) {
+    benchmark::DoNotOptimize(t);
     for (auto it = t.begin(); it != t.end(); ++it) {
-      benchmark::DoNotOptimize(it);
-      benchmark::DoNotOptimize(t);
-      benchmark::DoNotOptimize(it != t.end());
+      benchmark::DoNotOptimize(*it);
     }
   }
 }
-BENCHMARK(BM_EndComparison)->Arg(400);
 
-void BM_CopyCtor(benchmark::State& state) {
+BENCHMARK(BM_Iteration)
+    ->ArgPair(1, 1)
+    ->ArgPair(2, 2)
+    ->ArgPair(4, 4)
+    ->ArgPair(7, 7)
+    ->ArgPair(10, 10)
+    ->ArgPair(15, 15)
+    ->ArgPair(16, 16)
+    ->ArgPair(54, 54)
+    ->ArgPair(100, 100)
+    ->ArgPair(400, 400)
+    // empty
+    ->ArgPair(0, 0)
+    ->ArgPair(10, 0)
+    ->ArgPair(100, 0)
+    ->ArgPair(1000, 0)
+    ->ArgPair(10000, 0)
+    // sparse
+    ->ArgPair(100, 1)
+    ->ArgPair(1000, 10);
+
+void BM_CopyCtorSparseInt(benchmark::State& state) {
   std::random_device rd;
   std::mt19937 rng(rd());
   IntTable t;
   std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
 
-  while (t.size() < state.range(0)) {
+  size_t size = state.range(0);
+  t.reserve(size * 10);
+  while (t.size() < size) {
     t.emplace(dist(rng));
   }
 
-  for (auto _ : state) {
+  for (auto i : state) {
+    IntTable t2 = t;
+    benchmark::DoNotOptimize(t2);
+  }
+}
+BENCHMARK(BM_CopyCtorSparseInt)->Range(128, 4096);
+
+void BM_CopyCtorInt(benchmark::State& state) {
+  std::random_device rd;
+  std::mt19937 rng(rd());
+  IntTable t;
+  std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
+
+  size_t size = state.range(0);
+  while (t.size() < size) {
+    t.emplace(dist(rng));
+  }
+
+  for (auto i : state) {
     IntTable t2 = t;
     benchmark::DoNotOptimize(t2);
   }
 }
-BENCHMARK(BM_CopyCtor)->Range(128, 4096);
+BENCHMARK(BM_CopyCtorInt)->Range(128, 4096);
+
+void BM_CopyCtorString(benchmark::State& state) {
+  std::random_device rd;
+  std::mt19937 rng(rd());
+  StringTable t;
+  std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
+
+  size_t size = state.range(0);
+  while (t.size() < size) {
+    t.emplace(std::to_string(dist(rng)), std::to_string(dist(rng)));
+  }
+
+  for (auto i : state) {
+    StringTable t2 = t;
+    benchmark::DoNotOptimize(t2);
+  }
+}
+BENCHMARK(BM_CopyCtorString)->Range(128, 4096);
 
 void BM_CopyAssign(benchmark::State& state) {
   std::random_device rd;
@@ -330,33 +406,42 @@ void BM_Group_Match(benchmark::State& state) {
   h2_t h = 1;
   for (auto _ : state) {
     ::benchmark::DoNotOptimize(h);
+    ::benchmark::DoNotOptimize(g);
     ::benchmark::DoNotOptimize(g.Match(h));
   }
 }
 BENCHMARK(BM_Group_Match);
 
-void BM_Group_MatchEmpty(benchmark::State& state) {
+void BM_Group_MaskEmpty(benchmark::State& state) {
   std::array<ctrl_t, Group::kWidth> group;
   Iota(group.begin(), group.end(), -4);
   Group g{group.data()};
-  for (auto _ : state) ::benchmark::DoNotOptimize(g.MatchEmpty());
+  for (auto _ : state) {
+    ::benchmark::DoNotOptimize(g);
+    ::benchmark::DoNotOptimize(g.MaskEmpty());
+  }
 }
-BENCHMARK(BM_Group_MatchEmpty);
+BENCHMARK(BM_Group_MaskEmpty);
 
-void BM_Group_MatchEmptyOrDeleted(benchmark::State& state) {
+void BM_Group_MaskEmptyOrDeleted(benchmark::State& state) {
   std::array<ctrl_t, Group::kWidth> group;
   Iota(group.begin(), group.end(), -4);
   Group g{group.data()};
-  for (auto _ : state) ::benchmark::DoNotOptimize(g.MatchEmptyOrDeleted());
+  for (auto _ : state) {
+    ::benchmark::DoNotOptimize(g);
+    ::benchmark::DoNotOptimize(g.MaskEmptyOrDeleted());
+  }
 }
-BENCHMARK(BM_Group_MatchEmptyOrDeleted);
+BENCHMARK(BM_Group_MaskEmptyOrDeleted);
 
 void BM_Group_CountLeadingEmptyOrDeleted(benchmark::State& state) {
   std::array<ctrl_t, Group::kWidth> group;
   Iota(group.begin(), group.end(), -2);
   Group g{group.data()};
-  for (auto _ : state)
+  for (auto _ : state) {
+    ::benchmark::DoNotOptimize(g);
     ::benchmark::DoNotOptimize(g.CountLeadingEmptyOrDeleted());
+  }
 }
 BENCHMARK(BM_Group_CountLeadingEmptyOrDeleted);
 
@@ -364,7 +449,10 @@ void BM_Group_MatchFirstEmptyOrDeleted(benchmark::State& state) {
   std::array<ctrl_t, Group::kWidth> group;
   Iota(group.begin(), group.end(), -2);
   Group g{group.data()};
-  for (auto _ : state) ::benchmark::DoNotOptimize(*g.MatchEmptyOrDeleted());
+  for (auto _ : state) {
+    ::benchmark::DoNotOptimize(g);
+    ::benchmark::DoNotOptimize(g.MaskEmptyOrDeleted().LowestBitSet());
+  }
 }
 BENCHMARK(BM_Group_MatchFirstEmptyOrDeleted);
 
@@ -425,7 +513,6 @@ void CodegenAbslRawHashSetInt64Iterate(
 int odr =
     (::benchmark::DoNotOptimize(std::make_tuple(
          &CodegenAbslRawHashSetInt64Find, &CodegenAbslRawHashSetInt64FindNeEnd,
-         &CodegenAbslRawHashSetInt64Insert,
-         &CodegenAbslRawHashSetInt64Contains,
+         &CodegenAbslRawHashSetInt64Insert, &CodegenAbslRawHashSetInt64Contains,
          &CodegenAbslRawHashSetInt64Iterate)),
      1);
diff --git a/third_party/abseil-cpp/absl/container/internal/raw_hash_set_test.cc b/third_party/abseil-cpp/absl/container/internal/raw_hash_set_test.cc
index 362b3caec3..6478d3fcd8 100644
--- a/third_party/abseil-cpp/absl/container/internal/raw_hash_set_test.cc
+++ b/third_party/abseil-cpp/absl/container/internal/raw_hash_set_test.cc
@@ -14,28 +14,40 @@
 
 #include "absl/container/internal/raw_hash_set.h"
 
+#include <algorithm>
 #include <atomic>
 #include <cmath>
 #include <cstdint>
 #include <deque>
 #include <functional>
+#include <iterator>
+#include <list>
+#include <map>
 #include <memory>
 #include <numeric>
+#include <ostream>
 #include <random>
 #include <string>
+#include <type_traits>
 #include <unordered_map>
 #include <unordered_set>
+#include <utility>
+#include <vector>
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/base/attributes.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/cycleclock.h"
+#include "absl/base/internal/prefetch.h"
 #include "absl/base/internal/raw_logging.h"
+#include "absl/container/flat_hash_map.h"
+#include "absl/container/flat_hash_set.h"
 #include "absl/container/internal/container_memory.h"
 #include "absl/container/internal/hash_function_defaults.h"
 #include "absl/container/internal/hash_policy_testing.h"
 #include "absl/container/internal/hashtable_debug.h"
+#include "absl/log/log.h"
 #include "absl/strings/string_view.h"
 
 namespace absl {
@@ -194,35 +206,39 @@ TEST(Group, Match) {
   }
 }
 
-TEST(Group, MatchEmpty) {
+TEST(Group, MaskEmpty) {
   if (Group::kWidth == 16) {
     ctrl_t group[] = {ctrl_t::kEmpty, CtrlT(1), ctrl_t::kDeleted,  CtrlT(3),
                       ctrl_t::kEmpty, CtrlT(5), ctrl_t::kSentinel, CtrlT(7),
                       CtrlT(7),       CtrlT(5), CtrlT(3),          CtrlT(1),
                       CtrlT(1),       CtrlT(1), CtrlT(1),          CtrlT(1)};
-    EXPECT_THAT(Group{group}.MatchEmpty(), ElementsAre(0, 4));
+    EXPECT_THAT(Group{group}.MaskEmpty().LowestBitSet(), 0);
+    EXPECT_THAT(Group{group}.MaskEmpty().HighestBitSet(), 4);
   } else if (Group::kWidth == 8) {
     ctrl_t group[] = {ctrl_t::kEmpty,    CtrlT(1), CtrlT(2),
                       ctrl_t::kDeleted,  CtrlT(2), CtrlT(1),
                       ctrl_t::kSentinel, CtrlT(1)};
-    EXPECT_THAT(Group{group}.MatchEmpty(), ElementsAre(0));
+    EXPECT_THAT(Group{group}.MaskEmpty().LowestBitSet(), 0);
+    EXPECT_THAT(Group{group}.MaskEmpty().HighestBitSet(), 0);
   } else {
     FAIL() << "No test coverage for Group::kWidth==" << Group::kWidth;
   }
 }
 
-TEST(Group, MatchEmptyOrDeleted) {
+TEST(Group, MaskEmptyOrDeleted) {
   if (Group::kWidth == 16) {
-    ctrl_t group[] = {ctrl_t::kEmpty, CtrlT(1), ctrl_t::kDeleted,  CtrlT(3),
-                      ctrl_t::kEmpty, CtrlT(5), ctrl_t::kSentinel, CtrlT(7),
-                      CtrlT(7),       CtrlT(5), CtrlT(3),          CtrlT(1),
-                      CtrlT(1),       CtrlT(1), CtrlT(1),          CtrlT(1)};
-    EXPECT_THAT(Group{group}.MatchEmptyOrDeleted(), ElementsAre(0, 2, 4));
+    ctrl_t group[] = {ctrl_t::kEmpty,   CtrlT(1), ctrl_t::kEmpty,    CtrlT(3),
+                      ctrl_t::kDeleted, CtrlT(5), ctrl_t::kSentinel, CtrlT(7),
+                      CtrlT(7),         CtrlT(5), CtrlT(3),          CtrlT(1),
+                      CtrlT(1),         CtrlT(1), CtrlT(1),          CtrlT(1)};
+    EXPECT_THAT(Group{group}.MaskEmptyOrDeleted().LowestBitSet(), 0);
+    EXPECT_THAT(Group{group}.MaskEmptyOrDeleted().HighestBitSet(), 4);
   } else if (Group::kWidth == 8) {
     ctrl_t group[] = {ctrl_t::kEmpty,    CtrlT(1), CtrlT(2),
                       ctrl_t::kDeleted,  CtrlT(2), CtrlT(1),
                       ctrl_t::kSentinel, CtrlT(1)};
-    EXPECT_THAT(Group{group}.MatchEmptyOrDeleted(), ElementsAre(0, 3));
+    EXPECT_THAT(Group{group}.MaskEmptyOrDeleted().LowestBitSet(), 0);
+    EXPECT_THAT(Group{group}.MaskEmptyOrDeleted().HighestBitSet(), 3);
   } else {
     FAIL() << "No test coverage for Group::kWidth==" << Group::kWidth;
   }
@@ -334,7 +350,7 @@ class StringPolicy {
     struct ctor {};
 
     template <class... Ts>
-    slot_type(ctor, Ts&&... ts) : pair(std::forward<Ts>(ts)...) {}
+    explicit slot_type(ctor, Ts&&... ts) : pair(std::forward<Ts>(ts)...) {}
 
     std::pair<std::string, std::string> pair;
   };
@@ -406,7 +422,7 @@ struct CustomAlloc : std::allocator<T> {
   CustomAlloc() {}
 
   template <typename U>
-  CustomAlloc(const CustomAlloc<U>& other) {}
+  explicit CustomAlloc(const CustomAlloc<U>& /*other*/) {}
 
   template<class U> struct rebind {
     using other = CustomAlloc<U>;
@@ -1244,7 +1260,7 @@ ExpectedStats XorSeedExpectedStats() {
     case 16:
       if (kRandomizesInserts) {
         return {0.1,
-                1.0,
+                2.0,
                 {{0.95, 0.1}},
                 {{0.95, 0}, {0.99, 1}, {0.999, 8}, {0.9999, 15}}};
       } else {
@@ -1258,6 +1274,7 @@ ExpectedStats XorSeedExpectedStats() {
   return {};
 }
 
+// TODO(b/80415403): Figure out why this test is so flaky, esp. on MSVC
 TEST(Table, DISABLED_EnsureNonQuadraticTopNXorSeedByProbeSeqLength) {
   ProbeStatsPerSize stats;
   std::vector<size_t> sizes = {Group::kWidth << 5, Group::kWidth << 10};
@@ -1269,6 +1286,7 @@ TEST(Table, DISABLED_EnsureNonQuadraticTopNXorSeedByProbeSeqLength) {
   for (size_t size : sizes) {
     auto& stat = stats[size];
     VerifyStats(size, expected, stat);
+    LOG(INFO) << size << " " << stat;
   }
 }
 
@@ -1330,17 +1348,17 @@ ExpectedStats LinearTransformExpectedStats() {
                 {{0.95, 0.3}},
                 {{0.95, 0}, {0.99, 1}, {0.999, 8}, {0.9999, 15}}};
       } else {
-        return {0.15,
-                0.5,
-                {{0.95, 0.3}},
-                {{0.95, 0}, {0.99, 3}, {0.999, 15}, {0.9999, 25}}};
+        return {0.4,
+                0.6,
+                {{0.95, 0.5}},
+                {{0.95, 1}, {0.99, 14}, {0.999, 23}, {0.9999, 26}}};
       }
     case 16:
       if (kRandomizesInserts) {
         return {0.1,
                 0.4,
                 {{0.95, 0.3}},
-                {{0.95, 0}, {0.99, 1}, {0.999, 8}, {0.9999, 15}}};
+                {{0.95, 1}, {0.99, 2}, {0.999, 9}, {0.9999, 15}}};
       } else {
         return {0.05,
                 0.2,
@@ -1352,6 +1370,7 @@ ExpectedStats LinearTransformExpectedStats() {
   return {};
 }
 
+// TODO(b/80415403): Figure out why this test is so flaky.
 TEST(Table, DISABLED_EnsureNonQuadraticTopNLinearTransformByProbeSeqLength) {
   ProbeStatsPerSize stats;
   std::vector<size_t> sizes = {Group::kWidth << 5, Group::kWidth << 10};
@@ -1363,6 +1382,7 @@ TEST(Table, DISABLED_EnsureNonQuadraticTopNLinearTransformByProbeSeqLength) {
   for (size_t size : sizes) {
     auto& stat = stats[size];
     VerifyStats(size, expected, stat);
+    LOG(INFO) << size << " " << stat;
   }
 }
 
@@ -1497,7 +1517,7 @@ TEST(Table, RehashZeroForcesRehash) {
 TEST(Table, ConstructFromInitList) {
   using P = std::pair<std::string, std::string>;
   struct Q {
-    operator P() const { return {}; }
+    operator P() const { return {}; }  // NOLINT
   };
   StringTable t = {P(), Q(), {}, {{}, {}}};
 }
@@ -2016,20 +2036,59 @@ TEST(Table, UnstablePointers) {
   EXPECT_NE(old_ptr, addr(0));
 }
 
-// Confirm that we assert if we try to erase() end().
-TEST(TableDeathTest, EraseOfEndAsserts) {
+bool IsAssertEnabled() {
   // Use an assert with side-effects to figure out if they are actually enabled.
   bool assert_enabled = false;
-  assert([&]() {
+  assert([&]() {  // NOLINT
     assert_enabled = true;
     return true;
   }());
-  if (!assert_enabled) return;
+  return assert_enabled;
+}
+
+TEST(TableDeathTest, InvalidIteratorAsserts) {
+  if (!IsAssertEnabled()) GTEST_SKIP() << "Assertions not enabled.";
 
   IntTable t;
   // Extra simple "regexp" as regexp support is highly varied across platforms.
-  constexpr char kDeathMsg[] = "Invalid operation on iterator";
-  EXPECT_DEATH_IF_SUPPORTED(t.erase(t.end()), kDeathMsg);
+  EXPECT_DEATH_IF_SUPPORTED(
+      t.erase(t.end()),
+      "erase.* called on invalid iterator. The iterator might be an "
+      "end.*iterator or may have been default constructed.");
+  typename IntTable::iterator iter;
+  EXPECT_DEATH_IF_SUPPORTED(
+      ++iter,
+      "operator.* called on invalid iterator. The iterator might be an "
+      "end.*iterator or may have been default constructed.");
+  t.insert(0);
+  iter = t.begin();
+  t.erase(iter);
+  EXPECT_DEATH_IF_SUPPORTED(
+      ++iter,
+      "operator.* called on invalid iterator. The element might have been "
+      "erased or .*the table might have rehashed.");
+}
+
+TEST(TableDeathTest, IteratorInvalidAssertsEqualityOperator) {
+  if (!IsAssertEnabled()) GTEST_SKIP() << "Assertions not enabled.";
+
+  IntTable t;
+  t.insert(1);
+  t.insert(2);
+  t.insert(3);
+  auto iter1 = t.begin();
+  auto iter2 = std::next(iter1);
+  ASSERT_NE(iter1, t.end());
+  ASSERT_NE(iter2, t.end());
+  t.erase(iter1);
+  // Extra simple "regexp" as regexp support is highly varied across platforms.
+  const char* const kDeathMessage =
+      "Invalid operation on iterator. The element might have .*been erased or "
+      "the table might have rehashed.";
+  EXPECT_DEATH_IF_SUPPORTED(void(iter1 == iter2), kDeathMessage);
+  EXPECT_DEATH_IF_SUPPORTED(void(iter2 != iter1), kDeathMessage);
+  t.erase(iter2);
+  EXPECT_DEATH_IF_SUPPORTED(void(iter1 == iter2), kDeathMessage);
 }
 
 #if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
@@ -2040,7 +2099,7 @@ TEST(RawHashSamplerTest, Sample) {
 
   auto& sampler = GlobalHashtablezSampler();
   size_t start_size = 0;
-  std::unordered_set<const HashtablezInfo*> preexisting_info;
+  absl::flat_hash_set<const HashtablezInfo*> preexisting_info;
   start_size += sampler.Iterate([&](const HashtablezInfo& info) {
     preexisting_info.insert(&info);
     ++start_size;
@@ -2067,8 +2126,8 @@ TEST(RawHashSamplerTest, Sample) {
     }
   }
   size_t end_size = 0;
-  std::unordered_map<size_t, int> observed_checksums;
-  std::unordered_map<ssize_t, int> reservations;
+  absl::flat_hash_map<size_t, int> observed_checksums;
+  absl::flat_hash_map<ssize_t, int> reservations;
   end_size += sampler.Iterate([&](const HashtablezInfo& info) {
     if (preexisting_info.count(&info) == 0) {
       observed_checksums[info.hashes_bitwise_xor.load(
diff --git a/third_party/abseil-cpp/absl/container/internal/unordered_map_constructor_test.h b/third_party/abseil-cpp/absl/container/internal/unordered_map_constructor_test.h
index c1d20f3c52..7e84dc2554 100644
--- a/third_party/abseil-cpp/absl/container/internal/unordered_map_constructor_test.h
+++ b/third_party/abseil-cpp/absl/container/internal/unordered_map_constructor_test.h
@@ -476,7 +476,7 @@ TYPED_TEST_P(ConstructorTest, AssignmentOnSelf) {
 // containers in unspecified state (and in practice in causes memory-leak
 // according to heap-checker!).
 
-REGISTER_TYPED_TEST_CASE_P(
+REGISTER_TYPED_TEST_SUITE_P(
     ConstructorTest, NoArgs, BucketCount, BucketCountHash, BucketCountHashEqual,
     BucketCountHashEqualAlloc, BucketCountAlloc, BucketCountHashAlloc, Alloc,
     InputIteratorBucketHashEqualAlloc, InputIteratorBucketAlloc,
diff --git a/third_party/abseil-cpp/absl/container/internal/unordered_map_lookup_test.h b/third_party/abseil-cpp/absl/container/internal/unordered_map_lookup_test.h
index e76421e508..3713cd9a2b 100644
--- a/third_party/abseil-cpp/absl/container/internal/unordered_map_lookup_test.h
+++ b/third_party/abseil-cpp/absl/container/internal/unordered_map_lookup_test.h
@@ -107,8 +107,8 @@ TYPED_TEST_P(LookupTest, EqualRange) {
   }
 }
 
-REGISTER_TYPED_TEST_CASE_P(LookupTest, At, OperatorBracket, Count, Find,
-                           EqualRange);
+REGISTER_TYPED_TEST_SUITE_P(LookupTest, At, OperatorBracket, Count, Find,
+                            EqualRange);
 
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/internal/unordered_map_modifiers_test.h b/third_party/abseil-cpp/absl/container/internal/unordered_map_modifiers_test.h
index d3543936f7..4d9ab30fd4 100644
--- a/third_party/abseil-cpp/absl/container/internal/unordered_map_modifiers_test.h
+++ b/third_party/abseil-cpp/absl/container/internal/unordered_map_modifiers_test.h
@@ -297,11 +297,12 @@ TYPED_TEST_P(ModifiersTest, Swap) {
 // TODO(alkis): Write tests for extract.
 // TODO(alkis): Write tests for merge.
 
-REGISTER_TYPED_TEST_CASE_P(ModifiersTest, Clear, Insert, InsertHint,
-                           InsertRange, InsertWithinCapacity,
-                           InsertRangeWithinCapacity, InsertOrAssign,
-                           InsertOrAssignHint, Emplace, EmplaceHint, TryEmplace,
-                           TryEmplaceHint, Erase, EraseRange, EraseKey, Swap);
+REGISTER_TYPED_TEST_SUITE_P(ModifiersTest, Clear, Insert, InsertHint,
+                            InsertRange, InsertWithinCapacity,
+                            InsertRangeWithinCapacity, InsertOrAssign,
+                            InsertOrAssignHint, Emplace, EmplaceHint,
+                            TryEmplace, TryEmplaceHint, Erase, EraseRange,
+                            EraseKey, Swap);
 
 template <typename Type>
 struct is_unique_ptr : std::false_type {};
diff --git a/third_party/abseil-cpp/absl/container/internal/unordered_set_constructor_test.h b/third_party/abseil-cpp/absl/container/internal/unordered_set_constructor_test.h
index 41165b05e9..af1116e6c3 100644
--- a/third_party/abseil-cpp/absl/container/internal/unordered_set_constructor_test.h
+++ b/third_party/abseil-cpp/absl/container/internal/unordered_set_constructor_test.h
@@ -478,7 +478,7 @@ TYPED_TEST_P(ConstructorTest, AssignmentOnSelf) {
   EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
 }
 
-REGISTER_TYPED_TEST_CASE_P(
+REGISTER_TYPED_TEST_SUITE_P(
     ConstructorTest, NoArgs, BucketCount, BucketCountHash, BucketCountHashEqual,
     BucketCountHashEqualAlloc, BucketCountAlloc, BucketCountHashAlloc, Alloc,
     InputIteratorBucketHashEqualAlloc, InputIteratorBucketAlloc,
diff --git a/third_party/abseil-cpp/absl/container/internal/unordered_set_lookup_test.h b/third_party/abseil-cpp/absl/container/internal/unordered_set_lookup_test.h
index 8f2f4b207e..b35f766e79 100644
--- a/third_party/abseil-cpp/absl/container/internal/unordered_set_lookup_test.h
+++ b/third_party/abseil-cpp/absl/container/internal/unordered_set_lookup_test.h
@@ -82,7 +82,7 @@ TYPED_TEST_P(LookupTest, EqualRange) {
   }
 }
 
-REGISTER_TYPED_TEST_CASE_P(LookupTest, Count, Find, EqualRange);
+REGISTER_TYPED_TEST_SUITE_P(LookupTest, Count, Find, EqualRange);
 
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/internal/unordered_set_modifiers_test.h b/third_party/abseil-cpp/absl/container/internal/unordered_set_modifiers_test.h
index 6e473e45da..d8864bb28e 100644
--- a/third_party/abseil-cpp/absl/container/internal/unordered_set_modifiers_test.h
+++ b/third_party/abseil-cpp/absl/container/internal/unordered_set_modifiers_test.h
@@ -209,10 +209,10 @@ TYPED_TEST_P(ModifiersTest, Swap) {
 // TODO(alkis): Write tests for extract.
 // TODO(alkis): Write tests for merge.
 
-REGISTER_TYPED_TEST_CASE_P(ModifiersTest, Clear, Insert, InsertHint,
-                           InsertRange, InsertWithinCapacity,
-                           InsertRangeWithinCapacity, Emplace, EmplaceHint,
-                           Erase, EraseRange, EraseKey, Swap);
+REGISTER_TYPED_TEST_SUITE_P(ModifiersTest, Clear, Insert, InsertHint,
+                            InsertRange, InsertWithinCapacity,
+                            InsertRangeWithinCapacity, Emplace, EmplaceHint,
+                            Erase, EraseRange, EraseKey, Swap);
 
 }  // namespace container_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/container/node_hash_map.h b/third_party/abseil-cpp/absl/container/node_hash_map.h
index 7a39f6284c..6868e63a42 100644
--- a/third_party/abseil-cpp/absl/container/node_hash_map.h
+++ b/third_party/abseil-cpp/absl/container/node_hash_map.h
@@ -41,9 +41,10 @@
 #include <utility>
 
 #include "absl/algorithm/container.h"
+#include "absl/base/macros.h"
 #include "absl/container/internal/container_memory.h"
 #include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
-#include "absl/container/internal/node_hash_policy.h"
+#include "absl/container/internal/node_slot_policy.h"
 #include "absl/container/internal/raw_hash_map.h"  // IWYU pragma: export
 #include "absl/memory/memory.h"
 
@@ -77,6 +78,10 @@ class NodeHashMapPolicy;
 // absl/hash/hash.h for information on extending Abseil hashing to user-defined
 // types.
 //
+// Using `absl::node_hash_map` at interface boundaries in dynamically loaded
+// libraries (e.g. .dll, .so) is unsupported due to way `absl::Hash` values may
+// be randomized across dynamically loaded libraries.
+//
 // Example:
 //
 //   // Create a node hash map of three strings (that map to strings)
@@ -347,8 +352,8 @@ class node_hash_map
   // `node_hash_map`.
   //
   //   iterator try_emplace(const_iterator hint,
-  //                        const init_type& k, Args&&... args):
-  //   iterator try_emplace(const_iterator hint, init_type&& k, Args&&... args):
+  //                        const key_type& k, Args&&... args):
+  //   iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args):
   //
   // Inserts (via copy or move) the element of the specified key into the
   // `node_hash_map` using the position of `hint` as a non-binding suggestion
@@ -525,17 +530,19 @@ class node_hash_map
 // erase_if(node_hash_map<>, Pred)
 //
 // Erases all elements that satisfy the predicate `pred` from the container `c`.
+// Returns the number of erased elements.
 template <typename K, typename V, typename H, typename E, typename A,
           typename Predicate>
-void erase_if(node_hash_map<K, V, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
+typename node_hash_map<K, V, H, E, A>::size_type erase_if(
+    node_hash_map<K, V, H, E, A>& c, Predicate pred) {
+  return container_internal::EraseIf(pred, &c);
 }
 
 namespace container_internal {
 
 template <class Key, class Value>
 class NodeHashMapPolicy
-    : public absl::container_internal::node_hash_policy<
+    : public absl::container_internal::node_slot_policy<
           std::pair<const Key, Value>&, NodeHashMapPolicy<Key, Value>> {
   using value_type = std::pair<const Key, Value>;
 
diff --git a/third_party/abseil-cpp/absl/container/node_hash_map_test.cc b/third_party/abseil-cpp/absl/container/node_hash_map_test.cc
index 8f59a1e4a2..e941a836a4 100644
--- a/third_party/abseil-cpp/absl/container/node_hash_map_test.cc
+++ b/third_party/abseil-cpp/absl/container/node_hash_map_test.cc
@@ -223,33 +223,36 @@ TEST(NodeHashMap, EraseIf) {
   // Erase all elements.
   {
     node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return true; });
+    EXPECT_EQ(erase_if(s, [](std::pair<const int, int>) { return true; }), 5);
     EXPECT_THAT(s, IsEmpty());
   }
   // Erase no elements.
   {
     node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return false; });
+    EXPECT_EQ(erase_if(s, [](std::pair<const int, int>) { return false; }), 0);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3),
                                         Pair(4, 4), Pair(5, 5)));
   }
   // Erase specific elements.
   {
     node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s,
-             [](std::pair<const int, int> kvp) { return kvp.first % 2 == 1; });
+    EXPECT_EQ(erase_if(s,
+                       [](std::pair<const int, int> kvp) {
+                         return kvp.first % 2 == 1;
+                       }),
+              3);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(2, 2), Pair(4, 4)));
   }
   // Predicate is function reference.
   {
     node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, FirstIsEven);
+    EXPECT_EQ(erase_if(s, FirstIsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
   }
   // Predicate is function pointer.
   {
     node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, &FirstIsEven);
+    EXPECT_EQ(erase_if(s, &FirstIsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
   }
 }
diff --git a/third_party/abseil-cpp/absl/container/node_hash_set.h b/third_party/abseil-cpp/absl/container/node_hash_set.h
index 93b15f4681..f2cc70c3f6 100644
--- a/third_party/abseil-cpp/absl/container/node_hash_set.h
+++ b/third_party/abseil-cpp/absl/container/node_hash_set.h
@@ -38,8 +38,9 @@
 #include <type_traits>
 
 #include "absl/algorithm/container.h"
+#include "absl/base/macros.h"
 #include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
-#include "absl/container/internal/node_hash_policy.h"
+#include "absl/container/internal/node_slot_policy.h"
 #include "absl/container/internal/raw_hash_set.h"  // IWYU pragma: export
 #include "absl/memory/memory.h"
 
@@ -73,6 +74,10 @@ struct NodeHashSetPolicy;
 // absl/hash/hash.h for information on extending Abseil hashing to user-defined
 // types.
 //
+// Using `absl::node_hash_set` at interface boundaries in dynamically loaded
+// libraries (e.g. .dll, .so) is unsupported due to way `absl::Hash` values may
+// be randomized across dynamically loaded libraries.
+//
 // Example:
 //
 //   // Create a node hash set of three strings
@@ -433,16 +438,18 @@ class node_hash_set
 // erase_if(node_hash_set<>, Pred)
 //
 // Erases all elements that satisfy the predicate `pred` from the container `c`.
+// Returns the number of erased elements.
 template <typename T, typename H, typename E, typename A, typename Predicate>
-void erase_if(node_hash_set<T, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
+typename node_hash_set<T, H, E, A>::size_type erase_if(
+    node_hash_set<T, H, E, A>& c, Predicate pred) {
+  return container_internal::EraseIf(pred, &c);
 }
 
 namespace container_internal {
 
 template <class T>
 struct NodeHashSetPolicy
-    : absl::container_internal::node_hash_policy<T&, NodeHashSetPolicy<T>> {
+    : absl::container_internal::node_slot_policy<T&, NodeHashSetPolicy<T>> {
   using key_type = T;
   using init_type = T;
   using constant_iterators = std::true_type;
diff --git a/third_party/abseil-cpp/absl/container/node_hash_set_test.cc b/third_party/abseil-cpp/absl/container/node_hash_set_test.cc
index 7ddad2021d..98a8dbdd90 100644
--- a/third_party/abseil-cpp/absl/container/node_hash_set_test.cc
+++ b/third_party/abseil-cpp/absl/container/node_hash_set_test.cc
@@ -108,31 +108,31 @@ TEST(NodeHashSet, EraseIf) {
   // Erase all elements.
   {
     node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return true; });
+    EXPECT_EQ(erase_if(s, [](int) { return true; }), 5);
     EXPECT_THAT(s, IsEmpty());
   }
   // Erase no elements.
   {
     node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return false; });
+    EXPECT_EQ(erase_if(s, [](int) { return false; }), 0);
     EXPECT_THAT(s, UnorderedElementsAre(1, 2, 3, 4, 5));
   }
   // Erase specific elements.
   {
     node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int k) { return k % 2 == 1; });
+    EXPECT_EQ(erase_if(s, [](int k) { return k % 2 == 1; }), 3);
     EXPECT_THAT(s, UnorderedElementsAre(2, 4));
   }
   // Predicate is function reference.
   {
     node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, IsEven);
+    EXPECT_EQ(erase_if(s, IsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
   }
   // Predicate is function pointer.
   {
     node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, &IsEven);
+    EXPECT_EQ(erase_if(s, &IsEven), 2);
     EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
   }
 }
diff --git a/third_party/abseil-cpp/absl/copts/AbseilConfigureCopts.cmake b/third_party/abseil-cpp/absl/copts/AbseilConfigureCopts.cmake
index 942ce90a4d..f728c0e5ca 100644
--- a/third_party/abseil-cpp/absl/copts/AbseilConfigureCopts.cmake
+++ b/third_party/abseil-cpp/absl/copts/AbseilConfigureCopts.cmake
@@ -1,8 +1,6 @@
 # See absl/copts/copts.py and absl/copts/generate_copts.py
 include(GENERATED_AbseilCopts)
 
-set(ABSL_LSAN_LINKOPTS "")
-set(ABSL_HAVE_LSAN OFF)
 set(ABSL_DEFAULT_LINKOPTS "")
 
 if (BUILD_SHARED_LIBS AND MSVC)
@@ -12,7 +10,49 @@ else()
   set(ABSL_BUILD_DLL FALSE)
 endif()
 
-if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64")
+if(APPLE AND CMAKE_CXX_COMPILER_ID MATCHES [[Clang]])
+  # Some CMake targets (not known at the moment of processing) could be set to
+  # compile for multiple architectures as specified by the OSX_ARCHITECTURES
+  # property, which is target-specific.  We should neither inspect nor rely on
+  # any CMake property or variable to detect an architecture, in particular:
+  #
+  #   - CMAKE_OSX_ARCHITECTURES
+  #     is just an initial value for OSX_ARCHITECTURES; set too early.
+  #
+  #   - OSX_ARCHITECTURES
+  #     is a per-target property; targets could be defined later, and their
+  #     properties could be modified any time later.
+  #
+  #   - CMAKE_SYSTEM_PROCESSOR
+  #     does not reflect multiple architectures at all.
+  #
+  # When compiling for multiple architectures, a build system can invoke a
+  # compiler either
+  #
+  #   - once: a single command line for multiple architectures (Ninja build)
+  #   - twice: two command lines per each architecture (Xcode build system)
+  #
+  # If case of Xcode, it would be possible to set an Xcode-specific attributes
+  # like XCODE_ATTRIBUTE_OTHER_CPLUSPLUSFLAGS[arch=arm64] or similar.
+  #
+  # In both cases, the viable strategy is to pass all arguments at once, allowing
+  # the compiler to dispatch arch-specific arguments to a designated backend.
+  set(ABSL_RANDOM_RANDEN_COPTS "")
+  foreach(_arch IN ITEMS "x86_64" "arm64")
+    string(TOUPPER "${_arch}" _arch_uppercase)
+    string(REPLACE "X86_64" "X64" _arch_uppercase ${_arch_uppercase})
+    foreach(_flag IN LISTS ABSL_RANDOM_HWAES_${_arch_uppercase}_FLAGS)
+      list(APPEND ABSL_RANDOM_RANDEN_COPTS "-Xarch_${_arch}" "${_flag}")
+    endforeach()
+  endforeach()
+  # If a compiler happens to deal with an argument for a currently unused
+  # architecture, it will warn about an unused command line argument.
+  option(ABSL_RANDOM_RANDEN_COPTS_WARNING OFF
+         "Warn if one of ABSL_RANDOM_RANDEN_COPTS is unused")
+  if(ABSL_RANDOM_RANDEN_COPTS AND NOT ABSL_RANDOM_RANDEN_COPTS_WARNING)
+    list(APPEND ABSL_RANDOM_RANDEN_COPTS "-Wno-unused-command-line-argument")
+  endif()
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64")
   if (MSVC)
     set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}")
   else()
@@ -27,7 +67,6 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm.*|aarch64")
     message(WARNING "Value of CMAKE_SIZEOF_VOID_P (${CMAKE_SIZEOF_VOID_P}) is not supported.")
   endif()
 else()
-  message(WARNING "Value of CMAKE_SYSTEM_PROCESSOR (${CMAKE_SYSTEM_PROCESSOR}) is unknown and cannot be used to set ABSL_RANDOM_RANDEN_COPTS")
   set(ABSL_RANDOM_RANDEN_COPTS "")
 endif()
 
@@ -43,14 +82,6 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")  # MATCHES so we get both Clang an
   else()
     set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")
-    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-      # AppleClang doesn't have lsan
-      # https://developer.apple.com/documentation/code_diagnostics
-      if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
-        set(ABSL_LSAN_LINKOPTS "-fsanitize=leak")
-        set(ABSL_HAVE_LSAN ON)
-      endif()
-    endif()
   endif()
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
   set(ABSL_DEFAULT_COPTS "${ABSL_MSVC_FLAGS}")
diff --git a/third_party/abseil-cpp/absl/copts/GENERATED_AbseilCopts.cmake b/third_party/abseil-cpp/absl/copts/GENERATED_AbseilCopts.cmake
index a4ab1aa204..46563d41f0 100644
--- a/third_party/abseil-cpp/absl/copts/GENERATED_AbseilCopts.cmake
+++ b/third_party/abseil-cpp/absl/copts/GENERATED_AbseilCopts.cmake
@@ -15,13 +15,17 @@ list(APPEND ABSL_CLANG_CL_FLAGS
 list(APPEND ABSL_CLANG_CL_TEST_FLAGS
     "-Wno-c99-extensions"
     "-Wno-deprecated-declarations"
+    "-Wno-implicit-int-conversion"
     "-Wno-missing-noreturn"
     "-Wno-missing-prototypes"
     "-Wno-missing-variable-declarations"
     "-Wno-null-conversion"
     "-Wno-shadow"
     "-Wno-shift-sign-overflow"
+    "-Wno-shorten-64-to-32"
     "-Wno-sign-compare"
+    "-Wno-sign-conversion"
+    "-Wno-unreachable-code-loop-increment"
     "-Wno-unused-function"
     "-Wno-unused-member-function"
     "-Wno-unused-parameter"
@@ -80,6 +84,7 @@ list(APPEND ABSL_LLVM_FLAGS
     "-Wshadow-all"
     "-Wstring-conversion"
     "-Wtautological-overlap-compare"
+    "-Wtautological-unsigned-zero-compare"
     "-Wundef"
     "-Wuninitialized"
     "-Wunreachable-code"
@@ -91,9 +96,6 @@ list(APPEND ABSL_LLVM_FLAGS
     "-Wno-float-conversion"
     "-Wno-implicit-float-conversion"
     "-Wno-implicit-int-float-conversion"
-    "-Wno-implicit-int-conversion"
-    "-Wno-shorten-64-to-32"
-    "-Wno-sign-conversion"
     "-Wno-unknown-warning-option"
     "-DNOMINMAX"
 )
@@ -101,13 +103,17 @@ list(APPEND ABSL_LLVM_FLAGS
 list(APPEND ABSL_LLVM_TEST_FLAGS
     "-Wno-c99-extensions"
     "-Wno-deprecated-declarations"
+    "-Wno-implicit-int-conversion"
     "-Wno-missing-noreturn"
     "-Wno-missing-prototypes"
     "-Wno-missing-variable-declarations"
     "-Wno-null-conversion"
     "-Wno-shadow"
     "-Wno-shift-sign-overflow"
+    "-Wno-shorten-64-to-32"
     "-Wno-sign-compare"
+    "-Wno-sign-conversion"
+    "-Wno-unreachable-code-loop-increment"
     "-Wno-unused-function"
     "-Wno-unused-member-function"
     "-Wno-unused-parameter"
diff --git a/third_party/abseil-cpp/absl/copts/GENERATED_copts.bzl b/third_party/abseil-cpp/absl/copts/GENERATED_copts.bzl
index a6efc98e11..8518b63b89 100644
--- a/third_party/abseil-cpp/absl/copts/GENERATED_copts.bzl
+++ b/third_party/abseil-cpp/absl/copts/GENERATED_copts.bzl
@@ -16,13 +16,17 @@ ABSL_CLANG_CL_FLAGS = [
 ABSL_CLANG_CL_TEST_FLAGS = [
     "-Wno-c99-extensions",
     "-Wno-deprecated-declarations",
+    "-Wno-implicit-int-conversion",
     "-Wno-missing-noreturn",
     "-Wno-missing-prototypes",
     "-Wno-missing-variable-declarations",
     "-Wno-null-conversion",
     "-Wno-shadow",
     "-Wno-shift-sign-overflow",
+    "-Wno-shorten-64-to-32",
     "-Wno-sign-compare",
+    "-Wno-sign-conversion",
+    "-Wno-unreachable-code-loop-increment",
     "-Wno-unused-function",
     "-Wno-unused-member-function",
     "-Wno-unused-parameter",
@@ -81,6 +85,7 @@ ABSL_LLVM_FLAGS = [
     "-Wshadow-all",
     "-Wstring-conversion",
     "-Wtautological-overlap-compare",
+    "-Wtautological-unsigned-zero-compare",
     "-Wundef",
     "-Wuninitialized",
     "-Wunreachable-code",
@@ -92,9 +97,6 @@ ABSL_LLVM_FLAGS = [
     "-Wno-float-conversion",
     "-Wno-implicit-float-conversion",
     "-Wno-implicit-int-float-conversion",
-    "-Wno-implicit-int-conversion",
-    "-Wno-shorten-64-to-32",
-    "-Wno-sign-conversion",
     "-Wno-unknown-warning-option",
     "-DNOMINMAX",
 ]
@@ -102,13 +104,17 @@ ABSL_LLVM_FLAGS = [
 ABSL_LLVM_TEST_FLAGS = [
     "-Wno-c99-extensions",
     "-Wno-deprecated-declarations",
+    "-Wno-implicit-int-conversion",
     "-Wno-missing-noreturn",
     "-Wno-missing-prototypes",
     "-Wno-missing-variable-declarations",
     "-Wno-null-conversion",
     "-Wno-shadow",
     "-Wno-shift-sign-overflow",
+    "-Wno-shorten-64-to-32",
     "-Wno-sign-compare",
+    "-Wno-sign-conversion",
+    "-Wno-unreachable-code-loop-increment",
     "-Wno-unused-function",
     "-Wno-unused-member-function",
     "-Wno-unused-parameter",
diff --git a/third_party/abseil-cpp/absl/copts/configure_copts.bzl b/third_party/abseil-cpp/absl/copts/configure_copts.bzl
index 40d5849a3a..c5e57b38bf 100644
--- a/third_party/abseil-cpp/absl/copts/configure_copts.bzl
+++ b/third_party/abseil-cpp/absl/copts/configure_copts.bzl
@@ -25,6 +25,7 @@ ABSL_DEFAULT_COPTS = select({
     "//absl:msvc_compiler": ABSL_MSVC_FLAGS,
     "//absl:clang-cl_compiler": ABSL_CLANG_CL_FLAGS,
     "//absl:clang_compiler": ABSL_LLVM_FLAGS,
+    "//absl:gcc_compiler": ABSL_GCC_FLAGS,
     "//conditions:default": ABSL_GCC_FLAGS,
 })
 
@@ -32,6 +33,7 @@ ABSL_TEST_COPTS = ABSL_DEFAULT_COPTS + select({
     "//absl:msvc_compiler": ABSL_MSVC_TEST_FLAGS,
     "//absl:clang-cl_compiler": ABSL_CLANG_CL_TEST_FLAGS,
     "//absl:clang_compiler": ABSL_LLVM_TEST_FLAGS,
+    "//absl:gcc_compiler": ABSL_GCC_TEST_FLAGS,
     "//conditions:default": ABSL_GCC_TEST_FLAGS,
 })
 
diff --git a/third_party/abseil-cpp/absl/copts/copts.py b/third_party/abseil-cpp/absl/copts/copts.py
index 0d6c1ec3a6..17c467c103 100644
--- a/third_party/abseil-cpp/absl/copts/copts.py
+++ b/third_party/abseil-cpp/absl/copts/copts.py
@@ -19,13 +19,17 @@ MSVC_BIG_WARNING_FLAGS = [
 LLVM_TEST_DISABLE_WARNINGS_FLAGS = [
     "-Wno-c99-extensions",
     "-Wno-deprecated-declarations",
+    "-Wno-implicit-int-conversion",
     "-Wno-missing-noreturn",
     "-Wno-missing-prototypes",
     "-Wno-missing-variable-declarations",
     "-Wno-null-conversion",
     "-Wno-shadow",
     "-Wno-shift-sign-overflow",
+    "-Wno-shorten-64-to-32",
     "-Wno-sign-compare",
+    "-Wno-sign-conversion",
+    "-Wno-unreachable-code-loop-increment",
     "-Wno-unused-function",
     "-Wno-unused-member-function",
     "-Wno-unused-parameter",
@@ -96,6 +100,7 @@ COPT_VARS = {
         "-Wshadow-all",
         "-Wstring-conversion",
         "-Wtautological-overlap-compare",
+        "-Wtautological-unsigned-zero-compare",
         "-Wundef",
         "-Wuninitialized",
         "-Wunreachable-code",
@@ -109,9 +114,6 @@ COPT_VARS = {
         "-Wno-float-conversion",
         "-Wno-implicit-float-conversion",
         "-Wno-implicit-int-float-conversion",
-        "-Wno-implicit-int-conversion",
-        "-Wno-shorten-64-to-32",
-        "-Wno-sign-conversion",
         # Disable warnings on unknown warning flags (when warning flags are
         # unknown on older compiler versions)
         "-Wno-unknown-warning-option",
diff --git a/third_party/abseil-cpp/absl/debugging/BUILD.bazel b/third_party/abseil-cpp/absl/debugging/BUILD.bazel
index 3c4ea8dcdf..a40285c8ab 100644
--- a/third_party/abseil-cpp/absl/debugging/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/debugging/BUILD.bazel
@@ -49,6 +49,7 @@ cc_library(
         ":debugging_internal",
         "//absl/base:config",
         "//absl/base:core_headers",
+        "//absl/base:raw_logging_internal",
     ],
 )
 
@@ -121,7 +122,7 @@ cc_library(
     ],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
+    visibility = ["//absl/log/internal:__pkg__"],
     deps = [
         ":stacktrace",
         ":symbolize",
@@ -143,7 +144,6 @@ cc_library(
         "//absl/base",
         "//absl/base:config",
         "//absl/base:core_headers",
-        "//absl/base:errno_saver",
         "//absl/base:raw_logging_internal",
     ],
 )
@@ -197,6 +197,7 @@ cc_library(
     srcs = ["internal/demangle.cc"],
     hdrs = ["internal/demangle.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         "//absl/base",
@@ -225,6 +226,7 @@ cc_library(
     name = "leak_check",
     srcs = ["leak_check.cc"],
     hdrs = ["leak_check.h"],
+    copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:config",
@@ -232,98 +234,33 @@ cc_library(
     ],
 )
 
-# Adding a dependency to leak_check_disable will disable
-# sanitizer leak checking (asan/lsan) in a test without
-# the need to mess around with build features.
-cc_library(
-    name = "leak_check_disable",
-    srcs = ["leak_check_disable.cc"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    linkstatic = 1,
-    deps = ["//absl/base:config"],
-    alwayslink = 1,
-)
-
-# These targets exists for use in tests only, explicitly configuring the
-# LEAK_SANITIZER macro. It must be linked with -fsanitize=leak for lsan.
-ABSL_LSAN_LINKOPTS = select({
-    "//absl:clang_compiler": ["-fsanitize=leak"],
-    "//conditions:default": [],
-})
-
-cc_library(
-    name = "leak_check_api_enabled_for_testing",
-    testonly = 1,
-    srcs = ["leak_check.cc"],
-    hdrs = ["leak_check.h"],
-    copts = select({
-        "//absl:clang_compiler": ["-DLEAK_SANITIZER"],
-        "//conditions:default": [],
-    }),
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_library(
-    name = "leak_check_api_disabled_for_testing",
-    testonly = 1,
-    srcs = ["leak_check.cc"],
-    hdrs = ["leak_check.h"],
-    copts = ["-ULEAK_SANITIZER"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
 cc_test(
     name = "leak_check_test",
     srcs = ["leak_check_test.cc"],
-    copts = select({
-        "//absl:clang_compiler": ["-DABSL_EXPECT_LEAK_SANITIZER"],
-        "//conditions:default": [],
-    }),
-    linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
-    tags = ["notsan"],
-    deps = [
-        ":leak_check_api_enabled_for_testing",
-        "//absl/base",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "leak_check_no_lsan_test",
-    srcs = ["leak_check_test.cc"],
-    copts = ["-UABSL_EXPECT_LEAK_SANITIZER"],
+    copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["noasan"],
+    tags = ["notsan"],
     deps = [
-        ":leak_check_api_disabled_for_testing",
-        "//absl/base",  # for raw_logging
+        ":leak_check",
+        "//absl/base:config",
+        "//absl/base:raw_logging_internal",
         "@com_google_googletest//:gtest_main",
     ],
 )
 
-# Test that leak checking is skipped when lsan is enabled but
-# ":leak_check_disable" is linked in.
-#
-# This test should fail in the absence of a dependency on ":leak_check_disable"
-cc_test(
-    name = "disabled_leak_check_test",
+# Binary that leaks memory and expects to fail on exit.  This isn't a
+# test that expected to pass on its own; it exists to be called by a
+# script that checks exit status and output.
+# TODO(absl-team): Write a test to run this with a script that
+# verifies that it correctly fails.
+cc_binary(
+    name = "leak_check_fail_test_binary",
     srcs = ["leak_check_fail_test.cc"],
-    linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
-    tags = ["notsan"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
-        ":leak_check_api_enabled_for_testing",
-        ":leak_check_disable",
-        "//absl/base",
+        ":leak_check",
+        "//absl/base:raw_logging_internal",
         "@com_google_googletest//:gtest_main",
     ],
 )
@@ -356,3 +293,18 @@ cc_test(
         "@com_google_googletest//:gtest_main",
     ],
 )
+
+cc_binary(
+    name = "stacktrace_benchmark",
+    testonly = 1,
+    srcs = ["stacktrace_benchmark.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = ["benchmark"],
+    deps = [
+        ":stacktrace",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "@com_github_google_benchmark//:benchmark_main",
+    ],
+)
diff --git a/third_party/abseil-cpp/absl/debugging/BUILD.gn b/third_party/abseil-cpp/absl/debugging/BUILD.gn
new file mode 100644
index 0000000000..7585fa7956
--- /dev/null
+++ b/third_party/abseil-cpp/absl/debugging/BUILD.gn
@@ -0,0 +1,146 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/sanitizers/sanitizers.gni")
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("stacktrace") {
+  sources = [
+    "internal/stacktrace_aarch64-inl.inc",
+    "internal/stacktrace_arm-inl.inc",
+    "internal/stacktrace_config.h",
+    "internal/stacktrace_emscripten-inl.inc",
+    "internal/stacktrace_generic-inl.inc",
+    "internal/stacktrace_powerpc-inl.inc",
+    "internal/stacktrace_riscv-inl.inc",
+    "internal/stacktrace_unimplemented-inl.inc",
+    "internal/stacktrace_win32-inl.inc",
+    "internal/stacktrace_x86-inl.inc",
+    "stacktrace.cc",
+  ]
+  public = [ "stacktrace.h" ]
+  deps = [
+    ":debugging_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("symbolize") {
+  sources = [
+    "symbolize.cc",
+    "symbolize_darwin.inc",
+    "symbolize_elf.inc",
+    "symbolize_emscripten.inc",
+    "symbolize_unimplemented.inc",
+    "symbolize_win32.inc",
+  ]
+  public = [
+    "internal/symbolize.h",
+    "symbolize.h",
+  ]
+  deps = [
+    ":debugging_internal",
+    ":demangle_internal",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+    "//third_party/abseil-cpp/absl/base:malloc_internal",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+
+  # TODO(mbonadei): The bazel file has:
+  #   -DEFAULTLIB:dbghelp.lib
+  # evaluate if this needs to be added here as well.
+}
+
+absl_source_set("examine_stack") {
+  sources = [ "internal/examine_stack.cc" ]
+  public = [ "internal/examine_stack.h" ]
+  visibility = [
+    ":*",
+    "//third_party/abseil-cpp/absl/log/internal:*",
+  ]
+  deps = [
+    ":stacktrace",
+    ":symbolize",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("failure_signal_handler") {
+  sources = [ "failure_signal_handler.cc" ]
+  public = [ "failure_signal_handler.h" ]
+  deps = [
+    ":examine_stack",
+    ":stacktrace",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("debugging_internal") {
+  sources = [
+    "internal/address_is_readable.cc",
+    "internal/elf_mem_image.cc",
+    "internal/vdso_support.cc",
+  ]
+  public = [
+    "internal/address_is_readable.h",
+    "internal/elf_mem_image.h",
+    "internal/vdso_support.h",
+  ]
+  visibility = [ ":*" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+    "//third_party/abseil-cpp/absl/base:errno_saver",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("demangle_internal") {
+  sources = [ "internal/demangle.cc" ]
+  public = [ "internal/demangle.h" ]
+  visibility = [ ":*" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_source_set("leak_check") {
+  if (is_ios || is_win) {
+    sources = []
+    public = []
+  } else {
+    sources = [ "leak_check.cc" ]
+    public = [ "leak_check.h" ]
+  }
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_source_set("stack_consumption") {
+  testonly = true
+  sources = [ "internal/stack_consumption.cc" ]
+  public = [ "internal/stack_consumption.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+  visibility = [ ":*" ]
+}
diff --git a/third_party/abseil-cpp/absl/debugging/CMakeLists.txt b/third_party/abseil-cpp/absl/debugging/CMakeLists.txt
index b16fa007e3..e823f15b89 100644
--- a/third_party/abseil-cpp/absl/debugging/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/debugging/CMakeLists.txt
@@ -14,6 +14,8 @@
 # limitations under the License.
 #
 
+find_library(EXECINFO_LIBRARY execinfo)
+
 absl_cc_library(
   NAME
     stacktrace
@@ -33,10 +35,13 @@ absl_cc_library(
     "stacktrace.cc"
   COPTS
     ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    $<$<BOOL:${EXECINFO_LIBRARY}>:${EXECINFO_LIBRARY}>
   DEPS
     absl::debugging_internal
     absl::config
     absl::core_headers
+    absl::raw_logging_internal
   PUBLIC
 )
 
@@ -57,7 +62,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   LINKOPTS
     ${ABSL_DEFAULT_LINKOPTS}
-    $<$<BOOL:${MINGW}>:"dbghelp">
+    $<$<BOOL:${MINGW}>:-ldbghelp>
   DEPS
     absl::debugging_internal
     absl::demangle_internal
@@ -93,6 +98,7 @@ absl_cc_test(
     GTest::gmock
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     examine_stack
@@ -125,7 +131,6 @@ absl_cc_library(
     absl::base
     absl::config
     absl::core_headers
-    absl::errno_saver
     absl::raw_logging_internal
   PUBLIC
 )
@@ -147,6 +152,7 @@ absl_cc_test(
     GTest::gmock
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     debugging_internal
@@ -168,6 +174,7 @@ absl_cc_library(
     absl::raw_logging_internal
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     demangle_internal
@@ -215,42 +222,6 @@ absl_cc_library(
   PUBLIC
 )
 
-absl_cc_library(
-  NAME
-    leak_check_disable
-  SRCS
-    "leak_check_disable.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    leak_check_api_enabled_for_testing
-  HDRS
-    "leak_check.h"
-  SRCS
-    "leak_check.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    $<$<BOOL:${ABSL_HAVE_LSAN}>:-DLEAK_SANITIZER>
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    leak_check_api_disabled_for_testing
-  HDRS
-    "leak_check.h"
-  SRCS
-    "leak_check.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    "-ULEAK_SANITIZER"
-  TESTONLY
-)
-
 absl_cc_test(
   NAME
     leak_check_test
@@ -258,46 +229,15 @@ absl_cc_test(
     "leak_check_test.cc"
   COPTS
     ${ABSL_TEST_COPTS}
-    "$<$<BOOL:${ABSL_HAVE_LSAN}>:-DABSL_EXPECT_LEAK_SANITIZER>"
   LINKOPTS
-    "${ABSL_LSAN_LINKOPTS}"
-  DEPS
-    absl::leak_check_api_enabled_for_testing
-    absl::base
-    GTest::gmock_main
-)
-
-absl_cc_test(
-  NAME
-    leak_check_no_lsan_test
-  SRCS
-    "leak_check_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    "-UABSL_EXPECT_LEAK_SANITIZER"
-  DEPS
-    absl::leak_check_api_disabled_for_testing
-    absl::base
-    GTest::gmock_main
-)
-
-absl_cc_test(
-  NAME
-    disabled_leak_check_test
-  SRCS
-    "leak_check_fail_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    "${ABSL_LSAN_LINKOPTS}"
+    ${ABSL_DEFAULT_LINKOPTS}
   DEPS
-    absl::leak_check_api_enabled_for_testing
-    absl::leak_check_disable
+    absl::leak_check
     absl::base
-    absl::raw_logging_internal
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     stack_consumption
diff --git a/third_party/abseil-cpp/absl/debugging/failure_signal_handler.cc b/third_party/abseil-cpp/absl/debugging/failure_signal_handler.cc
index 689e5979e7..ef8ab9e5a8 100644
--- a/third_party/abseil-cpp/absl/debugging/failure_signal_handler.cc
+++ b/third_party/abseil-cpp/absl/debugging/failure_signal_handler.cc
@@ -42,7 +42,6 @@
 #include <ctime>
 
 #include "absl/base/attributes.h"
-#include "absl/base/internal/errno_saver.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/base/internal/sysinfo.h"
 #include "absl/debugging/internal/examine_stack.h"
@@ -51,8 +50,10 @@
 #ifndef _WIN32
 #define ABSL_HAVE_SIGACTION
 // Apple WatchOS and TVOS don't allow sigaltstack
-#if !(defined(TARGET_OS_WATCH) && TARGET_OS_WATCH) && \
-    !(defined(TARGET_OS_TV) && TARGET_OS_TV)
+// Apple macOS has sigaltstack, but using it makes backtrace() unusable.
+#if !(defined(TARGET_OS_OSX) && TARGET_OS_OSX) &&     \
+    !(defined(TARGET_OS_WATCH) && TARGET_OS_WATCH) && \
+    !(defined(TARGET_OS_TV) && TARGET_OS_TV) && !defined(__QNX__)
 #define ABSL_HAVE_SIGALTSTACK
 #endif
 #endif
@@ -134,10 +135,11 @@ static bool SetupAlternateStackOnce() {
 #if defined(__wasm__) || defined (__asjms__)
   const size_t page_mask = getpagesize() - 1;
 #else
-  const size_t page_mask = sysconf(_SC_PAGESIZE) - 1;
+  const size_t page_mask = static_cast<size_t>(sysconf(_SC_PAGESIZE)) - 1;
 #endif
   size_t stack_size =
-      (std::max<size_t>(SIGSTKSZ, 65536) + page_mask) & ~page_mask;
+      (std::max(static_cast<size_t>(SIGSTKSZ), size_t{65536}) + page_mask) &
+      ~page_mask;
 #if defined(ABSL_HAVE_ADDRESS_SANITIZER) || \
     defined(ABSL_HAVE_MEMORY_SANITIZER) || defined(ABSL_HAVE_THREAD_SANITIZER)
   // Account for sanitizer instrumentation requiring additional stack space.
@@ -217,8 +219,7 @@ static void InstallOneFailureHandler(FailureSignalData* data,
 #endif
 
 static void WriteToStderr(const char* data) {
-  absl::base_internal::ErrnoSaver errno_saver;
-  absl::raw_logging_internal::SafeWriteToStderr(data, strlen(data));
+  absl::raw_log_internal::AsyncSignalSafeWriteToStderr(data, strlen(data));
 }
 
 static void WriteSignalMessage(int signo, int cpu,
@@ -291,7 +292,7 @@ static void WriteFailureInfo(int signo, void* ucontext, int cpu,
 // some platforms.
 static void PortableSleepForSeconds(int seconds) {
 #ifdef _WIN32
-  Sleep(seconds * 1000);
+  Sleep(static_cast<DWORD>(seconds * 1000));
 #else
   struct timespec sleep_time;
   sleep_time.tv_sec = seconds;
@@ -325,9 +326,9 @@ static void AbslFailureSignalHandler(int signo, siginfo_t*, void* ucontext) {
 
   const GetTidType this_tid = absl::base_internal::GetTID();
   GetTidType previous_failed_tid = 0;
-  if (!failed_tid.compare_exchange_strong(
-          previous_failed_tid, static_cast<intptr_t>(this_tid),
-          std::memory_order_acq_rel, std::memory_order_relaxed)) {
+  if (!failed_tid.compare_exchange_strong(previous_failed_tid, this_tid,
+                                          std::memory_order_acq_rel,
+                                          std::memory_order_relaxed)) {
     ABSL_RAW_LOG(
         ERROR,
         "Signal %d raised at PC=%p while already in AbslFailureSignalHandler()",
@@ -356,7 +357,7 @@ static void AbslFailureSignalHandler(int signo, siginfo_t*, void* ucontext) {
   if (fsh_options.alarm_on_failure_secs > 0) {
     alarm(0);  // Cancel any existing alarms.
     signal(SIGALRM, ImmediateAbortSignalHandler);
-    alarm(fsh_options.alarm_on_failure_secs);
+    alarm(static_cast<unsigned int>(fsh_options.alarm_on_failure_secs));
   }
 #endif
 
diff --git a/third_party/abseil-cpp/absl/debugging/internal/address_is_readable.cc b/third_party/abseil-cpp/absl/debugging/internal/address_is_readable.cc
index 329c285f3b..91eaa76f8a 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/address_is_readable.cc
+++ b/third_party/abseil-cpp/absl/debugging/internal/address_is_readable.cc
@@ -30,16 +30,12 @@ bool AddressIsReadable(const void* /* addr */) { return true; }
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#else
+#else  // __linux__ && !__ANDROID__
 
-#include <fcntl.h>
-#include <sys/syscall.h>
+#include <stdint.h>
+#include <syscall.h>
 #include <unistd.h>
 
-#include <atomic>
-#include <cerrno>
-#include <cstdint>
-
 #include "absl/base/internal/errno_saver.h"
 #include "absl/base/internal/raw_logging.h"
 
@@ -47,93 +43,54 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace debugging_internal {
 
-// Pack a pid and two file descriptors into a 64-bit word,
-// using 16, 24, and 24 bits for each respectively.
-static uint64_t Pack(uint64_t pid, uint64_t read_fd, uint64_t write_fd) {
-  ABSL_RAW_CHECK((read_fd >> 24) == 0 && (write_fd >> 24) == 0,
-                 "fd out of range");
-  return (pid << 48) | ((read_fd & 0xffffff) << 24) | (write_fd & 0xffffff);
-}
-
-// Unpack x into a pid and two file descriptors, where x was created with
-// Pack().
-static void Unpack(uint64_t x, int *pid, int *read_fd, int *write_fd) {
-  *pid = x >> 48;
-  *read_fd = (x >> 24) & 0xffffff;
-  *write_fd = x & 0xffffff;
-}
+// NOTE: be extra careful about adding any interposable function calls here
+// (such as open(), read(), etc.). These symbols may be interposed and will get
+// invoked in contexts they don't expect.
+//
+// NOTE: any new system calls here may also require sandbox reconfiguration.
+//
+bool AddressIsReadable(const void *addr) {
+  // Align address on 8-byte boundary. On aarch64, checking last
+  // byte before inaccessible page returned unexpected EFAULT.
+  const uintptr_t u_addr = reinterpret_cast<uintptr_t>(addr) & ~uintptr_t{7};
+  addr = reinterpret_cast<const void *>(u_addr);
 
-// Return whether the byte at *addr is readable, without faulting.
-// Save and restores errno.   Returns true on systems where
-// unimplemented.
-// This is a namespace-scoped variable for correct zero-initialization.
-static std::atomic<uint64_t> pid_and_fds;  // initially 0, an invalid pid.
+  // rt_sigprocmask below will succeed for this input.
+  if (addr == nullptr) return false;
 
-bool AddressIsReadable(const void *addr) {
   absl::base_internal::ErrnoSaver errno_saver;
-  // We test whether a byte is readable by using write().  Normally, this would
-  // be done via a cached file descriptor to /dev/null, but linux fails to
-  // check whether the byte is readable when the destination is /dev/null, so
-  // we use a cached pipe.  We store the pid of the process that created the
-  // pipe to handle the case where a process forks, and the child closes all
-  // the file descriptors and then calls this routine.  This is not perfect:
-  // the child could use the routine, then close all file descriptors and then
-  // use this routine again.  But the likely use of this routine is when
-  // crashing, to test the validity of pages when dumping the stack.  Beware
-  // that we may leak file descriptors, but we're unlikely to leak many.
-  int bytes_written;
-  int current_pid = getpid() & 0xffff;   // we use only the low order 16 bits
-  do {  // until we do not get EBADF trying to use file descriptors
-    int pid;
-    int read_fd;
-    int write_fd;
-    uint64_t local_pid_and_fds = pid_and_fds.load(std::memory_order_acquire);
-    Unpack(local_pid_and_fds, &pid, &read_fd, &write_fd);
-    while (current_pid != pid) {
-      int p[2];
-      // new pipe
-      if (pipe(p) != 0) {
-        ABSL_RAW_LOG(FATAL, "Failed to create pipe, errno=%d", errno);
-      }
-      fcntl(p[0], F_SETFD, FD_CLOEXEC);
-      fcntl(p[1], F_SETFD, FD_CLOEXEC);
-      uint64_t new_pid_and_fds = Pack(current_pid, p[0], p[1]);
-      if (pid_and_fds.compare_exchange_strong(
-              local_pid_and_fds, new_pid_and_fds, std::memory_order_release,
-              std::memory_order_relaxed)) {
-        local_pid_and_fds = new_pid_and_fds;  // fds exposed to other threads
-      } else {  // fds not exposed to other threads; we can close them.
-        close(p[0]);
-        close(p[1]);
-        local_pid_and_fds = pid_and_fds.load(std::memory_order_acquire);
-      }
-      Unpack(local_pid_and_fds, &pid, &read_fd, &write_fd);
-    }
-    errno = 0;
-    // Use syscall(SYS_write, ...) instead of write() to prevent ASAN
-    // and other checkers from complaining about accesses to arbitrary
-    // memory.
-    do {
-      bytes_written = syscall(SYS_write, write_fd, addr, 1);
-    } while (bytes_written == -1 && errno == EINTR);
-    if (bytes_written == 1) {   // remove the byte from the pipe
-      char c;
-      while (read(read_fd, &c, 1) == -1 && errno == EINTR) {
-      }
-    }
-    if (errno == EBADF) {  // Descriptors invalid.
-      // If pid_and_fds contains the problematic file descriptors we just used,
-      // this call will forget them, and the loop will try again.
-      pid_and_fds.compare_exchange_strong(local_pid_and_fds, 0,
-                                          std::memory_order_release,
-                                          std::memory_order_relaxed);
-    }
-  } while (errno == EBADF);
-  return bytes_written == 1;
+
+  // Here we probe with some syscall which
+  // - accepts an 8-byte region of user memory as input
+  // - tests for EFAULT before other validation
+  // - has no problematic side-effects
+  //
+  // rt_sigprocmask(2) works for this.  It copies sizeof(kernel_sigset_t)==8
+  // bytes from the address into the kernel memory before any validation.
+  //
+  // The call can never succeed, since the `how` parameter is not one of
+  // SIG_BLOCK, SIG_UNBLOCK, SIG_SETMASK.
+  //
+  // This strategy depends on Linux implementation details,
+  // so we rely on the test to alert us if it stops working.
+  //
+  // Some discarded past approaches:
+  // - msync() doesn't reject PROT_NONE regions
+  // - write() on /dev/null doesn't return EFAULT
+  // - write() on a pipe requires creating it and draining the writes
+  // - connect() works but is problematic for sandboxes and needs a valid
+  //   file descriptor
+  //
+  // This can never succeed (invalid first argument to sigprocmask).
+  ABSL_RAW_CHECK(syscall(SYS_rt_sigprocmask, ~0, addr, nullptr,
+                         /*sizeof(kernel_sigset_t)*/ 8) == -1,
+                 "unexpected success");
+  ABSL_RAW_CHECK(errno == EFAULT || errno == EINVAL, "unexpected errno");
+  return errno != EFAULT;
 }
 
 }  // namespace debugging_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif
+#endif  // __linux__ && !__ANDROID__
diff --git a/third_party/abseil-cpp/absl/debugging/internal/demangle.cc b/third_party/abseil-cpp/absl/debugging/internal/demangle.cc
index 93ae32796c..f2832915bf 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/demangle.cc
+++ b/third_party/abseil-cpp/absl/debugging/internal/demangle.cc
@@ -151,12 +151,12 @@ static const AbbrevPair kSubstitutionList[] = {
 // State needed for demangling.  This struct is copied in almost every stack
 // frame, so every byte counts.
 typedef struct {
-  int mangled_idx;                   // Cursor of mangled name.
-  int out_cur_idx;                   // Cursor of output string.
-  int prev_name_idx;                 // For constructors/destructors.
-  signed int prev_name_length : 16;  // For constructors/destructors.
-  signed int nest_level : 15;        // For nested names.
-  unsigned int append : 1;           // Append flag.
+  int mangled_idx;                     // Cursor of mangled name.
+  int out_cur_idx;                     // Cursor of output string.
+  int prev_name_idx;                   // For constructors/destructors.
+  unsigned int prev_name_length : 16;  // For constructors/destructors.
+  signed int nest_level : 15;          // For nested names.
+  unsigned int append : 1;             // Append flag.
   // Note: for some reason MSVC can't pack "bool append : 1" into the same int
   // with the above two fields, so we use an int instead.  Amusingly it can pack
   // "signed bool" as expected, but relying on that to continue to be a legal
@@ -235,8 +235,8 @@ static size_t StrLen(const char *str) {
 }
 
 // Returns true if "str" has at least "n" characters remaining.
-static bool AtLeastNumCharsRemaining(const char *str, int n) {
-  for (int i = 0; i < n; ++i) {
+static bool AtLeastNumCharsRemaining(const char *str, size_t n) {
+  for (size_t i = 0; i < n; ++i) {
     if (str[i] == '\0') {
       return false;
     }
@@ -253,18 +253,20 @@ static bool StrPrefix(const char *str, const char *prefix) {
   return prefix[i] == '\0';  // Consumed everything in "prefix".
 }
 
-static void InitState(State *state, const char *mangled, char *out,
-                      int out_size) {
+static void InitState(State* state,
+                      const char* mangled,
+                      char* out,
+                      size_t out_size) {
   state->mangled_begin = mangled;
   state->out = out;
-  state->out_end_idx = out_size;
+  state->out_end_idx = static_cast<int>(out_size);
   state->recursion_depth = 0;
   state->steps = 0;
 
   state->parse_state.mangled_idx = 0;
   state->parse_state.out_cur_idx = 0;
   state->parse_state.prev_name_idx = 0;
-  state->parse_state.prev_name_length = -1;
+  state->parse_state.prev_name_length = 0;
   state->parse_state.nest_level = -1;
   state->parse_state.append = true;
 }
@@ -356,8 +358,8 @@ static bool ZeroOrMore(ParseFunc parse_func, State *state) {
 // Append "str" at "out_cur_idx".  If there is an overflow, out_cur_idx is
 // set to out_end_idx+1.  The output string is ensured to
 // always terminate with '\0' as long as there is no overflow.
-static void Append(State *state, const char *const str, const int length) {
-  for (int i = 0; i < length; ++i) {
+static void Append(State *state, const char *const str, const size_t length) {
+  for (size_t i = 0; i < length; ++i) {
     if (state->parse_state.out_cur_idx + 1 <
         state->out_end_idx) {  // +1 for '\0'
       state->out[state->parse_state.out_cur_idx++] = str[i];
@@ -420,7 +422,7 @@ static bool EndsWith(State *state, const char chr) {
 
 // Append "str" with some tweaks, iff "append" state is true.
 static void MaybeAppendWithLength(State *state, const char *const str,
-                                  const int length) {
+                                  const size_t length) {
   if (state->parse_state.append && length > 0) {
     // Append a space if the output buffer ends with '<' and "str"
     // starts with '<' to avoid <<<.
@@ -432,14 +434,14 @@ static void MaybeAppendWithLength(State *state, const char *const str,
     if (state->parse_state.out_cur_idx < state->out_end_idx &&
         (IsAlpha(str[0]) || str[0] == '_')) {
       state->parse_state.prev_name_idx = state->parse_state.out_cur_idx;
-      state->parse_state.prev_name_length = length;
+      state->parse_state.prev_name_length = static_cast<unsigned int>(length);
     }
     Append(state, str, length);
   }
 }
 
 // Appends a positive decimal number to the output if appending is enabled.
-static bool MaybeAppendDecimal(State *state, unsigned int val) {
+static bool MaybeAppendDecimal(State *state, int val) {
   // Max {32-64}-bit unsigned int is 20 digits.
   constexpr size_t kMaxLength = 20;
   char buf[kMaxLength];
@@ -451,12 +453,12 @@ static bool MaybeAppendDecimal(State *state, unsigned int val) {
     // one-past-the-end and manipulate one character before the pointer.
     char *p = &buf[kMaxLength];
     do {  // val=0 is the only input that should write a leading zero digit.
-      *--p = (val % 10) + '0';
+      *--p = static_cast<char>((val % 10) + '0');
       val /= 10;
     } while (p > buf && val != 0);
 
     // 'p' landed on the last character we set.  How convenient.
-    Append(state, p, kMaxLength - (p - buf));
+    Append(state, p, kMaxLength - static_cast<size_t>(p - buf));
   }
 
   return true;
@@ -466,7 +468,7 @@ static bool MaybeAppendDecimal(State *state, unsigned int val) {
 // Returns true so that it can be placed in "if" conditions.
 static bool MaybeAppend(State *state, const char *const str) {
   if (state->parse_state.append) {
-    int length = StrLen(str);
+    size_t length = StrLen(str);
     MaybeAppendWithLength(state, str, length);
   }
   return true;
@@ -521,10 +523,10 @@ static void MaybeCancelLastSeparator(State *state) {
 
 // Returns true if the identifier of the given length pointed to by
 // "mangled_cur" is anonymous namespace.
-static bool IdentifierIsAnonymousNamespace(State *state, int length) {
+static bool IdentifierIsAnonymousNamespace(State *state, size_t length) {
   // Returns true if "anon_prefix" is a proper prefix of "mangled_cur".
   static const char anon_prefix[] = "_GLOBAL__N_";
-  return (length > static_cast<int>(sizeof(anon_prefix) - 1) &&
+  return (length > (sizeof(anon_prefix) - 1) &&
           StrPrefix(RemainingInput(state), anon_prefix));
 }
 
@@ -542,12 +544,13 @@ static bool ParseUnnamedTypeName(State *state);
 static bool ParseNumber(State *state, int *number_out);
 static bool ParseFloatNumber(State *state);
 static bool ParseSeqId(State *state);
-static bool ParseIdentifier(State *state, int length);
+static bool ParseIdentifier(State *state, size_t length);
 static bool ParseOperatorName(State *state, int *arity);
 static bool ParseSpecialName(State *state);
 static bool ParseCallOffset(State *state);
 static bool ParseNVOffset(State *state);
 static bool ParseVOffset(State *state);
+static bool ParseAbiTags(State *state);
 static bool ParseCtorDtorName(State *state);
 static bool ParseDecltype(State *state);
 static bool ParseType(State *state);
@@ -601,7 +604,7 @@ static bool ParseSubstitution(State *state, bool accept_std);
 //
 // Reference:
 // - Itanium C++ ABI
-//   <https://mentorembedded.github.io/cxx-abi/abi.html#mangling>
+//   <https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling>
 
 // <mangled-name> ::= _Z <encoding>
 static bool ParseMangledName(State *state) {
@@ -741,17 +744,42 @@ static bool ParsePrefix(State *state) {
   return true;
 }
 
-// <unqualified-name> ::= <operator-name>
-//                    ::= <ctor-dtor-name>
-//                    ::= <source-name>
-//                    ::= <local-source-name> // GCC extension; see below.
-//                    ::= <unnamed-type-name>
+// <unqualified-name> ::= <operator-name> [<abi-tags>]
+//                    ::= <ctor-dtor-name> [<abi-tags>]
+//                    ::= <source-name> [<abi-tags>]
+//                    ::= <local-source-name> [<abi-tags>]
+//                    ::= <unnamed-type-name> [<abi-tags>]
+//
+// <local-source-name> is a GCC extension; see below.
 static bool ParseUnqualifiedName(State *state) {
   ComplexityGuard guard(state);
   if (guard.IsTooComplex()) return false;
-  return (ParseOperatorName(state, nullptr) || ParseCtorDtorName(state) ||
-          ParseSourceName(state) || ParseLocalSourceName(state) ||
-          ParseUnnamedTypeName(state));
+  if (ParseOperatorName(state, nullptr) || ParseCtorDtorName(state) ||
+      ParseSourceName(state) || ParseLocalSourceName(state) ||
+      ParseUnnamedTypeName(state)) {
+    return ParseAbiTags(state);
+  }
+  return false;
+}
+
+// <abi-tags> ::= <abi-tag> [<abi-tags>]
+// <abi-tag>  ::= B <source-name>
+static bool ParseAbiTags(State *state) {
+  ComplexityGuard guard(state);
+  if (guard.IsTooComplex()) return false;
+
+  while (ParseOneCharToken(state, 'B')) {
+    ParseState copy = state->parse_state;
+    MaybeAppend(state, "[abi:");
+
+    if (!ParseSourceName(state)) {
+      state->parse_state = copy;
+      return false;
+    }
+    MaybeAppend(state, "]");
+  }
+
+  return true;
 }
 
 // <source-name> ::= <positive length number> <identifier>
@@ -760,7 +788,8 @@ static bool ParseSourceName(State *state) {
   if (guard.IsTooComplex()) return false;
   ParseState copy = state->parse_state;
   int length = -1;
-  if (ParseNumber(state, &length) && ParseIdentifier(state, length)) {
+  if (ParseNumber(state, &length) &&
+      ParseIdentifier(state, static_cast<size_t>(length))) {
     return true;
   }
   state->parse_state = copy;
@@ -838,7 +867,7 @@ static bool ParseNumber(State *state, int *number_out) {
   uint64_t number = 0;
   for (; *p != '\0'; ++p) {
     if (IsDigit(*p)) {
-      number = number * 10 + (*p - '0');
+      number = number * 10 + static_cast<uint64_t>(*p - '0');
     } else {
       break;
     }
@@ -853,7 +882,7 @@ static bool ParseNumber(State *state, int *number_out) {
     state->parse_state.mangled_idx += p - RemainingInput(state);
     if (number_out != nullptr) {
       // Note: possibly truncate "number".
-      *number_out = number;
+      *number_out = static_cast<int>(number);
     }
     return true;
   }
@@ -897,10 +926,10 @@ static bool ParseSeqId(State *state) {
 }
 
 // <identifier> ::= <unqualified source code identifier> (of given length)
-static bool ParseIdentifier(State *state, int length) {
+static bool ParseIdentifier(State *state, size_t length) {
   ComplexityGuard guard(state);
   if (guard.IsTooComplex()) return false;
-  if (length < 0 || !AtLeastNumCharsRemaining(RemainingInput(state), length)) {
+  if (!AtLeastNumCharsRemaining(RemainingInput(state), length)) {
     return false;
   }
   if (IdentifierIsAnonymousNamespace(state, length)) {
@@ -1947,7 +1976,7 @@ static bool Overflowed(const State *state) {
 }
 
 // The demangler entry point.
-bool Demangle(const char *mangled, char *out, int out_size) {
+bool Demangle(const char* mangled, char* out, size_t out_size) {
   State state;
   InitState(&state, mangled, out, out_size);
   return ParseTopLevelMangledName(&state) && !Overflowed(&state) &&
diff --git a/third_party/abseil-cpp/absl/debugging/internal/demangle.h b/third_party/abseil-cpp/absl/debugging/internal/demangle.h
index c314d9bc23..e1f156989f 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/demangle.h
+++ b/third_party/abseil-cpp/absl/debugging/internal/demangle.h
@@ -62,7 +62,7 @@ namespace debugging_internal {
 // Demangle `mangled`.  On success, return true and write the
 // demangled symbol name to `out`.  Otherwise, return false.
 // `out` is modified even if demangling is unsuccessful.
-bool Demangle(const char *mangled, char *out, int out_size);
+bool Demangle(const char* mangled, char* out, size_t out_size);
 
 }  // namespace debugging_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/debugging/internal/demangle_test.cc b/third_party/abseil-cpp/absl/debugging/internal/demangle_test.cc
index 6b142902ca..8463a2b7d1 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/demangle_test.cc
+++ b/third_party/abseil-cpp/absl/debugging/internal/demangle_test.cc
@@ -102,6 +102,30 @@ TEST(Demangle, Clones) {
   EXPECT_FALSE(Demangle("_ZL3Foov.isra.2.constprop.", tmp, sizeof(tmp)));
 }
 
+// Test the GNU abi_tag extension.
+TEST(Demangle, AbiTags) {
+  char tmp[80];
+
+  // Mangled name generated via:
+  // struct [[gnu::abi_tag("abc")]] A{};
+  // A a;
+  EXPECT_TRUE(Demangle("_Z1aB3abc", tmp, sizeof(tmp)));
+  EXPECT_STREQ("a[abi:abc]", tmp);
+
+  // Mangled name generated via:
+  // struct B {
+  //   B [[gnu::abi_tag("xyz")]] (){};
+  // };
+  // B b;
+  EXPECT_TRUE(Demangle("_ZN1BC2B3xyzEv", tmp, sizeof(tmp)));
+  EXPECT_STREQ("B::B[abi:xyz]()", tmp);
+
+  // Mangled name generated via:
+  // [[gnu::abi_tag("foo", "bar")]] void C() {}
+  EXPECT_TRUE(Demangle("_Z1CB3barB3foov", tmp, sizeof(tmp)));
+  EXPECT_STREQ("C[abi:bar][abi:foo]()", tmp);
+}
+
 // Tests that verify that Demangle footprint is within some limit.
 // They are not to be run under sanitizers as the sanitizers increase
 // stack consumption by about 4x.
diff --git a/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.cc b/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.cc
index 29a281812b..42dcd3cde9 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.cc
+++ b/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.cc
@@ -91,7 +91,7 @@ int ElfMemImage::GetNumSymbols() const {
     return 0;
   }
   // See http://www.caldera.com/developers/gabi/latest/ch5.dynamic.html#hash
-  return hash_[1];
+  return static_cast<int>(hash_[1]);
 }
 
 const ElfW(Sym) *ElfMemImage::GetDynsym(int index) const {
@@ -105,11 +105,9 @@ const ElfW(Versym) *ElfMemImage::GetVersym(int index) const {
 }
 
 const ElfW(Phdr) *ElfMemImage::GetPhdr(int index) const {
-  ABSL_RAW_CHECK(index < ehdr_->e_phnum, "index out of range");
-  return GetTableElement<ElfW(Phdr)>(ehdr_,
-                                     ehdr_->e_phoff,
-                                     ehdr_->e_phentsize,
-                                     index);
+  ABSL_RAW_CHECK(index >= 0 && index < ehdr_->e_phnum, "index out of range");
+  return GetTableElement<ElfW(Phdr)>(ehdr_, ehdr_->e_phoff, ehdr_->e_phentsize,
+                                     static_cast<size_t>(index));
 }
 
 const char *ElfMemImage::GetDynstr(ElfW(Word) offset) const {
@@ -159,7 +157,8 @@ void ElfMemImage::Init(const void *base) {
   hash_      = nullptr;
   strsize_   = 0;
   verdefnum_ = 0;
-  link_base_ = ~0L;  // Sentinel: PT_LOAD .p_vaddr can't possibly be this.
+  // Sentinel: PT_LOAD .p_vaddr can't possibly be this.
+  link_base_ = ~ElfW(Addr){0};  // NOLINT(readability/braces)
   if (!base) {
     return;
   }
@@ -218,11 +217,11 @@ void ElfMemImage::Init(const void *base) {
   }
   ptrdiff_t relocation =
       base_as_char - reinterpret_cast<const char *>(link_base_);
-  ElfW(Dyn) *dynamic_entry =
-      reinterpret_cast<ElfW(Dyn) *>(dynamic_program_header->p_vaddr +
-                                    relocation);
+  ElfW(Dyn)* dynamic_entry = reinterpret_cast<ElfW(Dyn)*>(
+      static_cast<intptr_t>(dynamic_program_header->p_vaddr) + relocation);
   for (; dynamic_entry->d_tag != DT_NULL; ++dynamic_entry) {
-    const auto value = dynamic_entry->d_un.d_val + relocation;
+    const auto value =
+        static_cast<intptr_t>(dynamic_entry->d_un.d_val) + relocation;
     switch (dynamic_entry->d_tag) {
       case DT_HASH:
         hash_ = reinterpret_cast<ElfW(Word) *>(value);
@@ -240,10 +239,10 @@ void ElfMemImage::Init(const void *base) {
         verdef_ = reinterpret_cast<ElfW(Verdef) *>(value);
         break;
       case DT_VERDEFNUM:
-        verdefnum_ = dynamic_entry->d_un.d_val;
+        verdefnum_ = static_cast<size_t>(dynamic_entry->d_un.d_val);
         break;
       case DT_STRSZ:
-        strsize_ = dynamic_entry->d_un.d_val;
+        strsize_ = static_cast<size_t>(dynamic_entry->d_un.d_val);
         break;
       default:
         // Unrecognized entries explicitly ignored.
@@ -351,7 +350,11 @@ void ElfMemImage::SymbolIterator::Update(int increment) {
   const ElfW(Versym) *version_symbol = image->GetVersym(index_);
   ABSL_RAW_CHECK(symbol && version_symbol, "");
   const char *const symbol_name = image->GetDynstr(symbol->st_name);
+#if defined(__NetBSD__)
+  const int version_index = version_symbol->vs_vers & VERSYM_VERSION;
+#else
   const ElfW(Versym) version_index = version_symbol[0] & VERSYM_VERSION;
+#endif
   const ElfW(Verdef) *version_definition = nullptr;
   const char *version_name = "";
   if (symbol->st_shndx == SHN_UNDEF) {
diff --git a/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.h b/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.h
index a894bd423e..113071a9d1 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.h
+++ b/third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.h
@@ -31,8 +31,9 @@
 #error ABSL_HAVE_ELF_MEM_IMAGE cannot be directly set
 #endif
 
-#if defined(__ELF__) && !defined(__native_client__) && !defined(__asmjs__) && \
-    !defined(__wasm__)
+#if defined(__ELF__) && !defined(__OpenBSD__) && !defined(__QNX__) && \
+    !defined(__native_client__) && !defined(__asmjs__) &&             \
+    !defined(__wasm__) && !defined(__HAIKU__)
 #define ABSL_HAVE_ELF_MEM_IMAGE 1
 #endif
 
diff --git a/third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc b/third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc
index 589a3ef367..57863228d8 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc
+++ b/third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc
@@ -20,7 +20,13 @@
 #include <unistd.h>
 #endif
 
-#ifdef __APPLE__
+#include "absl/base/config.h"
+
+#ifdef ABSL_HAVE_MMAP
+#include <sys/mman.h>
+#endif
+
+#if defined(__linux__) || defined(__APPLE__)
 #include <sys/ucontext.h>
 #endif
 
@@ -37,10 +43,115 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace debugging_internal {
 
+namespace {
+constexpr int kDefaultDumpStackFramesLimit = 64;
+// The %p field width for printf() functions is two characters per byte,
+// and two extra for the leading "0x".
+constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
+
+ABSL_CONST_INIT SymbolizeUrlEmitter debug_stack_trace_hook = nullptr;
+
+// Async-signal safe mmap allocator.
+void* Allocate(size_t num_bytes) {
+#ifdef ABSL_HAVE_MMAP
+  void* p = ::mmap(nullptr, num_bytes, PROT_READ | PROT_WRITE,
+                   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+  return p == MAP_FAILED ? nullptr : p;
+#else
+  (void)num_bytes;
+  return nullptr;
+#endif  // ABSL_HAVE_MMAP
+}
+
+void Deallocate(void* p, size_t size) {
+#ifdef ABSL_HAVE_MMAP
+  ::munmap(p, size);
+#else
+  (void)p;
+  (void)size;
+#endif  // ABSL_HAVE_MMAP
+}
+
+// Print a program counter only.
+void DumpPC(OutputWriter* writer, void* writer_arg, void* const pc,
+            const char* const prefix) {
+  char buf[100];
+  snprintf(buf, sizeof(buf), "%s@ %*p\n", prefix, kPrintfPointerFieldWidth, pc);
+  writer(buf, writer_arg);
+}
+
+// Print a program counter and the corresponding stack frame size.
+void DumpPCAndFrameSize(OutputWriter* writer, void* writer_arg, void* const pc,
+                        int framesize, const char* const prefix) {
+  char buf[100];
+  if (framesize <= 0) {
+    snprintf(buf, sizeof(buf), "%s@ %*p  (unknown)\n", prefix,
+             kPrintfPointerFieldWidth, pc);
+  } else {
+    snprintf(buf, sizeof(buf), "%s@ %*p  %9d\n", prefix,
+             kPrintfPointerFieldWidth, pc, framesize);
+  }
+  writer(buf, writer_arg);
+}
+
+// Print a program counter and the corresponding symbol.
+void DumpPCAndSymbol(OutputWriter* writer, void* writer_arg, void* const pc,
+                     const char* const prefix) {
+  char tmp[1024];
+  const char* symbol = "(unknown)";
+  // Symbolizes the previous address of pc because pc may be in the
+  // next function.  The overrun happens when the function ends with
+  // a call to a function annotated noreturn (e.g. CHECK).
+  // If symbolization of pc-1 fails, also try pc on the off-chance
+  // that we crashed on the first instruction of a function (that
+  // actually happens very often for e.g. __restore_rt).
+  const uintptr_t prev_pc = reinterpret_cast<uintptr_t>(pc) - 1;
+  if (absl::Symbolize(reinterpret_cast<const char*>(prev_pc), tmp,
+                      sizeof(tmp)) ||
+      absl::Symbolize(pc, tmp, sizeof(tmp))) {
+    symbol = tmp;
+  }
+  char buf[1024];
+  snprintf(buf, sizeof(buf), "%s@ %*p  %s\n", prefix, kPrintfPointerFieldWidth,
+           pc, symbol);
+  writer(buf, writer_arg);
+}
+
+// Print a program counter, its stack frame size, and its symbol name.
+// Note that there is a separate symbolize_pc argument. Return addresses may be
+// at the end of the function, and this allows the caller to back up from pc if
+// appropriate.
+void DumpPCAndFrameSizeAndSymbol(OutputWriter* writer, void* writer_arg,
+                                 void* const pc, void* const symbolize_pc,
+                                 int framesize, const char* const prefix) {
+  char tmp[1024];
+  const char* symbol = "(unknown)";
+  if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
+    symbol = tmp;
+  }
+  char buf[1024];
+  if (framesize <= 0) {
+    snprintf(buf, sizeof(buf), "%s@ %*p  (unknown)  %s\n", prefix,
+             kPrintfPointerFieldWidth, pc, symbol);
+  } else {
+    snprintf(buf, sizeof(buf), "%s@ %*p  %9d  %s\n", prefix,
+             kPrintfPointerFieldWidth, pc, framesize, symbol);
+  }
+  writer(buf, writer_arg);
+}
+
+}  // namespace
+
+void RegisterDebugStackTraceHook(SymbolizeUrlEmitter hook) {
+  debug_stack_trace_hook = hook;
+}
+
+SymbolizeUrlEmitter GetDebugStackTraceHook() { return debug_stack_trace_hook; }
+
 // Returns the program counter from signal context, nullptr if
 // unknown. vuc is a ucontext_t*. We use void* to avoid the use of
 // ucontext_t on non-POSIX systems.
-void* GetProgramCounter(void* vuc) {
+void* GetProgramCounter(void* const vuc) {
 #ifdef __linux__
   if (vuc != nullptr) {
     ucontext_t* context = reinterpret_cast<ucontext_t*>(vuc);
@@ -82,6 +193,8 @@ void* GetProgramCounter(void* vuc) {
       return reinterpret_cast<void*>(context->uc_mcontext.gregs[16]);
 #elif defined(__e2k__)
     return reinterpret_cast<void*>(context->uc_mcontext.cr0_hi);
+#elif defined(__loongarch__)
+    return reinterpret_cast<void*>(context->uc_mcontext.__pc);
 #else
 #error "Undefined Architecture."
 #endif
@@ -120,59 +233,17 @@ void* GetProgramCounter(void* vuc) {
   return nullptr;
 }
 
-// The %p field width for printf() functions is two characters per byte,
-// and two extra for the leading "0x".
-static constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
-
-// Print a program counter, its stack frame size, and its symbol name.
-// Note that there is a separate symbolize_pc argument. Return addresses may be
-// at the end of the function, and this allows the caller to back up from pc if
-// appropriate.
-static void DumpPCAndFrameSizeAndSymbol(void (*writerfn)(const char*, void*),
-                                        void* writerfn_arg, void* pc,
-                                        void* symbolize_pc, int framesize,
-                                        const char* const prefix) {
-  char tmp[1024];
-  const char* symbol = "(unknown)";
-  if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
-    symbol = tmp;
-  }
-  char buf[1024];
-  if (framesize <= 0) {
-    snprintf(buf, sizeof(buf), "%s@ %*p  (unknown)  %s\n", prefix,
-             kPrintfPointerFieldWidth, pc, symbol);
-  } else {
-    snprintf(buf, sizeof(buf), "%s@ %*p  %9d  %s\n", prefix,
-             kPrintfPointerFieldWidth, pc, framesize, symbol);
-  }
-  writerfn(buf, writerfn_arg);
-}
-
-// Print a program counter and the corresponding stack frame size.
-static void DumpPCAndFrameSize(void (*writerfn)(const char*, void*),
-                               void* writerfn_arg, void* pc, int framesize,
-                               const char* const prefix) {
-  char buf[100];
-  if (framesize <= 0) {
-    snprintf(buf, sizeof(buf), "%s@ %*p  (unknown)\n", prefix,
-             kPrintfPointerFieldWidth, pc);
-  } else {
-    snprintf(buf, sizeof(buf), "%s@ %*p  %9d\n", prefix,
-             kPrintfPointerFieldWidth, pc, framesize);
-  }
-  writerfn(buf, writerfn_arg);
-}
-
-void DumpPCAndFrameSizesAndStackTrace(
-    void* pc, void* const stack[], int frame_sizes[], int depth,
-    int min_dropped_frames, bool symbolize_stacktrace,
-    void (*writerfn)(const char*, void*), void* writerfn_arg) {
+void DumpPCAndFrameSizesAndStackTrace(void* const pc, void* const stack[],
+                                      int frame_sizes[], int depth,
+                                      int min_dropped_frames,
+                                      bool symbolize_stacktrace,
+                                      OutputWriter* writer, void* writer_arg) {
   if (pc != nullptr) {
     // We don't know the stack frame size for PC, use 0.
     if (symbolize_stacktrace) {
-      DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, pc, pc, 0, "PC: ");
+      DumpPCAndFrameSizeAndSymbol(writer, writer_arg, pc, pc, 0, "PC: ");
     } else {
-      DumpPCAndFrameSize(writerfn, writerfn_arg, pc, 0, "PC: ");
+      DumpPCAndFrameSize(writer, writer_arg, pc, 0, "PC: ");
     }
   }
   for (int i = 0; i < depth; i++) {
@@ -182,20 +253,63 @@ void DumpPCAndFrameSizesAndStackTrace(
       // call to a function annotated noreturn (e.g. CHECK). Note that we don't
       // do this for pc above, as the adjustment is only correct for return
       // addresses.
-      DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, stack[i],
+      DumpPCAndFrameSizeAndSymbol(writer, writer_arg, stack[i],
                                   reinterpret_cast<char*>(stack[i]) - 1,
                                   frame_sizes[i], "    ");
     } else {
-      DumpPCAndFrameSize(writerfn, writerfn_arg, stack[i], frame_sizes[i],
-                         "    ");
+      DumpPCAndFrameSize(writer, writer_arg, stack[i], frame_sizes[i], "    ");
     }
   }
   if (min_dropped_frames > 0) {
     char buf[100];
     snprintf(buf, sizeof(buf), "    @ ... and at least %d more frames\n",
              min_dropped_frames);
-    writerfn(buf, writerfn_arg);
+    writer(buf, writer_arg);
+  }
+}
+
+// Dump current stack trace as directed by writer.
+// Make sure this function is not inlined to avoid skipping too many top frames.
+ABSL_ATTRIBUTE_NOINLINE
+void DumpStackTrace(int min_dropped_frames, int max_num_frames,
+                    bool symbolize_stacktrace, OutputWriter* writer,
+                    void* writer_arg) {
+  // Print stack trace
+  void* stack_buf[kDefaultDumpStackFramesLimit];
+  void** stack = stack_buf;
+  int num_stack = kDefaultDumpStackFramesLimit;
+  size_t allocated_bytes = 0;
+
+  if (num_stack >= max_num_frames) {
+    // User requested fewer frames than we already have space for.
+    num_stack = max_num_frames;
+  } else {
+    const size_t needed_bytes =
+        static_cast<size_t>(max_num_frames) * sizeof(stack[0]);
+    void* p = Allocate(needed_bytes);
+    if (p != nullptr) {  // We got the space.
+      num_stack = max_num_frames;
+      stack = reinterpret_cast<void**>(p);
+      allocated_bytes = needed_bytes;
+    }
   }
+
+  int depth = absl::GetStackTrace(stack, num_stack, min_dropped_frames + 1);
+  for (int i = 0; i < depth; i++) {
+    if (symbolize_stacktrace) {
+      DumpPCAndSymbol(writer, writer_arg, stack[static_cast<size_t>(i)],
+                      "    ");
+    } else {
+      DumpPC(writer, writer_arg, stack[static_cast<size_t>(i)], "    ");
+    }
+  }
+
+  auto hook = GetDebugStackTraceHook();
+  if (hook != nullptr) {
+    (*hook)(stack, depth, writer, writer_arg);
+  }
+
+  if (allocated_bytes != 0) Deallocate(stack, allocated_bytes);
 }
 
 }  // namespace debugging_internal
diff --git a/third_party/abseil-cpp/absl/debugging/internal/examine_stack.h b/third_party/abseil-cpp/absl/debugging/internal/examine_stack.h
index 393369131f..190af87f1c 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/examine_stack.h
+++ b/third_party/abseil-cpp/absl/debugging/internal/examine_stack.h
@@ -23,17 +23,39 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace debugging_internal {
 
+// Type of function used for printing in stack trace dumping, etc.
+// We avoid closures to keep things simple.
+typedef void OutputWriter(const char*, void*);
+
+// RegisterDebugStackTraceHook() allows to register a single routine
+// `hook` that is called each time DumpStackTrace() is called.
+// `hook` may be called from a signal handler.
+typedef void (*SymbolizeUrlEmitter)(void* const stack[], int depth,
+                                    OutputWriter* writer, void* writer_arg);
+
+// Registration of SymbolizeUrlEmitter for use inside of a signal handler.
+// This is inherently unsafe and must be signal safe code.
+void RegisterDebugStackTraceHook(SymbolizeUrlEmitter hook);
+SymbolizeUrlEmitter GetDebugStackTraceHook();
+
 // Returns the program counter from signal context, or nullptr if
 // unknown. `vuc` is a ucontext_t*. We use void* to avoid the use of
 // ucontext_t on non-POSIX systems.
-void* GetProgramCounter(void* vuc);
+void* GetProgramCounter(void* const vuc);
 
-// Uses `writerfn` to dump the program counter, stack trace, and stack
+// Uses `writer` to dump the program counter, stack trace, and stack
 // frame sizes.
-void DumpPCAndFrameSizesAndStackTrace(
-    void* pc, void* const stack[], int frame_sizes[], int depth,
-    int min_dropped_frames, bool symbolize_stacktrace,
-    void (*writerfn)(const char*, void*), void* writerfn_arg);
+void DumpPCAndFrameSizesAndStackTrace(void* const pc, void* const stack[],
+                                      int frame_sizes[], int depth,
+                                      int min_dropped_frames,
+                                      bool symbolize_stacktrace,
+                                      OutputWriter* writer, void* writer_arg);
+
+// Dump current stack trace omitting the topmost `min_dropped_frames` stack
+// frames.
+void DumpStackTrace(int min_dropped_frames, int max_num_frames,
+                    bool symbolize_stacktrace, OutputWriter* writer,
+                    void* writer_arg);
 
 }  // namespace debugging_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc
index f4859d7c21..71cdaf0940 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc
@@ -19,7 +19,7 @@
 #include "absl/debugging/internal/vdso_support.h"  // a no-op on non-elf or non-glibc systems
 #include "absl/debugging/stacktrace.h"
 
-static const uintptr_t kUnknownFrameSize = 0;
+static const size_t kUnknownFrameSize = 0;
 
 #if defined(__linux__)
 // Returns the address of the VDSO __kernel_rt_sigreturn function, if present.
@@ -65,11 +65,12 @@ static const unsigned char* GetKernelRtSigreturnAddress() {
 // Compute the size of a stack frame in [low..high).  We assume that
 // low < high.  Return size of kUnknownFrameSize.
 template<typename T>
-static inline uintptr_t ComputeStackFrameSize(const T* low,
-                                              const T* high) {
+static inline size_t ComputeStackFrameSize(const T* low,
+                                           const T* high) {
   const char* low_char_ptr = reinterpret_cast<const char *>(low);
   const char* high_char_ptr = reinterpret_cast<const char *>(high);
-  return low < high ? high_char_ptr - low_char_ptr : kUnknownFrameSize;
+  return low < high ? static_cast<size_t>(high_char_ptr - low_char_ptr)
+                    : kUnknownFrameSize;
 }
 
 // Given a pointer to a stack frame, locate and return the calling
@@ -110,15 +111,15 @@ static void **NextStackFrame(void **old_frame_pointer, const void *uc) {
   }
 #endif
 
-  // aarch64 ABI requires stack pointer to be 16-byte-aligned.
-  if ((reinterpret_cast<uintptr_t>(new_frame_pointer) & 15) != 0)
+  // The frame pointer should be 8-byte aligned.
+  if ((reinterpret_cast<uintptr_t>(new_frame_pointer) & 7) != 0)
     return nullptr;
 
   // Check frame size.  In strict mode, we assume frames to be under
   // 100,000 bytes.  In non-strict mode, we relax the limit to 1MB.
   if (check_frame_size) {
-    const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
-    const uintptr_t frame_size =
+    const size_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
+    const size_t frame_size =
         ComputeStackFrameSize(old_frame_pointer, new_frame_pointer);
     if (frame_size == kUnknownFrameSize || frame_size > max_size)
       return nullptr;
@@ -165,7 +166,8 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
     } else {
       result[n] = prev_return_address;
       if (IS_STACK_FRAMES) {
-        sizes[n] = ComputeStackFrameSize(frame_pointer, next_frame_pointer);
+        sizes[n] = static_cast<int>(
+            ComputeStackFrameSize(frame_pointer, next_frame_pointer));
       }
       n++;
     }
@@ -176,12 +178,17 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
     // Implementation detail: we clamp the max of frames we are willing to
     // count, so as not to spend too much time in the loop below.
     const int kMaxUnwind = 200;
-    int j = 0;
-    for (; frame_pointer != nullptr && j < kMaxUnwind; j++) {
+    int num_dropped_frames = 0;
+    for (int j = 0; frame_pointer != nullptr && j < kMaxUnwind; j++) {
+      if (skip_count > 0) {
+        skip_count--;
+      } else {
+        num_dropped_frames++;
+      }
       frame_pointer =
           NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
     }
-    *min_dropped_frames = j;
+    *min_dropped_frames = num_dropped_frames;
   }
   return n;
 }
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_arm-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_arm-inl.inc
index 2a1bf2e886..102a2a1251 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_arm-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_arm-inl.inc
@@ -112,11 +112,16 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
     // Implementation detail: we clamp the max of frames we are willing to
     // count, so as not to spend too much time in the loop below.
     const int kMaxUnwind = 200;
-    int j = 0;
-    for (; sp != nullptr && j < kMaxUnwind; j++) {
+    int num_dropped_frames = 0;
+    for (int j = 0; sp != nullptr && j < kMaxUnwind; j++) {
+      if (skip_count > 0) {
+        skip_count--;
+      } else {
+        num_dropped_frames++;
+      }
       sp = NextStackFrame<!IS_STACK_FRAMES>(sp);
     }
-    *min_dropped_frames = j;
+    *min_dropped_frames = num_dropped_frames;
   }
   return n;
 }
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h
index ff21b719a0..3929b1b734 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h
@@ -37,7 +37,8 @@
   "absl/debugging/internal/stacktrace_generic-inl.inc"
 #endif  // defined(ABSL_HAVE_THREAD_LOCAL)
 
-#elif defined(__EMSCRIPTEN__)
+// Emscripten stacktraces rely on JS. Do not use them in standalone mode.
+#elif defined(__EMSCRIPTEN__) && !defined(STANDALONE_WASM)
 #define ABSL_STACKTRACE_INL_HEADER \
   "absl/debugging/internal/stacktrace_emscripten-inl.inc"
 
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc
index b2792a1f3a..b500aa33cd 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc
@@ -43,17 +43,6 @@ static __thread int recursive = 0;
 // glibc implementation itself will trigger malloc the first time it is called.
 // As such, we suppress usage of backtrace during this early stage of execution.
 static std::atomic<bool> disable_stacktraces(true);  // Disabled until healthy.
-// Waiting until static initializers run seems to be late enough.
-// This file is included into stacktrace.cc so this will only run once.
-ABSL_ATTRIBUTE_UNUSED static int stacktraces_enabler = []() {
-  void* unused_stack[1];
-  // Force the first backtrace to happen early to get the one-time shared lib
-  // loading (allocation) out of the way. After the first call it is much safer
-  // to use backtrace from a signal handler if we crash somewhere later.
-  backtrace(unused_stack, 1);
-  disable_stacktraces.store(false, std::memory_order_relaxed);
-  return 0;
-}();
 
 template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
 static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
@@ -80,7 +69,7 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
 
   if (IS_STACK_FRAMES) {
     // No implementation for finding out the stack frame sizes yet.
-    memset(sizes, 0, sizeof(*sizes) * result_count);
+    memset(sizes, 0, sizeof(*sizes) * static_cast<size_t>(result_count));
   }
   if (min_dropped_frames != nullptr) {
     if (size - skip_count - max_depth > 0) {
@@ -99,7 +88,7 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace debugging_internal {
 bool StackTraceWorksForTest() {
-  return true;
+  return false;
 }
 }  // namespace debugging_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc
index cf8c05160c..085cef6702 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc
@@ -231,11 +231,16 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
     // Implementation detail: we clamp the max of frames we are willing to
     // count, so as not to spend too much time in the loop below.
     const int kMaxUnwind = 1000;
-    int j = 0;
-    for (; next_sp != nullptr && j < kMaxUnwind; j++) {
+    int num_dropped_frames = 0;
+    for (int j = 0; next_sp != nullptr && j < kMaxUnwind; j++) {
+      if (skip_count > 0) {
+        skip_count--;
+      } else {
+        num_dropped_frames++;
+      }
       next_sp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(next_sp, ucp);
     }
-    *min_dropped_frames = j;
+    *min_dropped_frames = num_dropped_frames;
   }
   return n;
 }
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc
index 8cbc78548c..20183fa321 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc
@@ -30,56 +30,14 @@
 #include <cassert>
 #include <cstdint>
 #include <iostream>
+#include <limits>
+#include <utility>
 
 #include "absl/base/attributes.h"
-#include "absl/debugging/internal/address_is_readable.h"
-#include "absl/debugging/internal/vdso_support.h"
 #include "absl/debugging/stacktrace.h"
 
 static const uintptr_t kUnknownFrameSize = 0;
 
-#if defined(__linux__)
-// Returns the address of the VDSO __kernel_rt_sigreturn function, if present.
-static const unsigned char *GetKernelRtSigreturnAddress() {
-  constexpr uintptr_t kImpossibleAddress = 0;
-  ABSL_CONST_INIT static std::atomic<uintptr_t> memoized(kImpossibleAddress);
-  uintptr_t address = memoized.load(std::memory_order_relaxed);
-  if (address != kImpossibleAddress) {
-    return reinterpret_cast<const unsigned char *>(address);
-  }
-
-  address = reinterpret_cast<uintptr_t>(nullptr);
-
-#if ABSL_HAVE_VDSO_SUPPORT
-  absl::debugging_internal::VDSOSupport vdso;
-  if (vdso.IsPresent()) {
-    absl::debugging_internal::VDSOSupport::SymbolInfo symbol_info;
-    // Symbol versioning pulled from arch/riscv/kernel/vdso/vdso.lds at v5.10.
-    auto lookup = [&](int type) {
-      return vdso.LookupSymbol("__kernel_rt_sigreturn", "LINUX_4.15", type,
-                               &symbol_info);
-    };
-    if ((!lookup(STT_FUNC) && !lookup(STT_NOTYPE)) ||
-        symbol_info.address == nullptr) {
-      // Unexpected: VDSO is present, yet the expected symbol is missing or
-      // null.
-      assert(false && "VDSO is present, but doesn't have expected symbol");
-    } else {
-      if (reinterpret_cast<uintptr_t>(symbol_info.address) !=
-          kImpossibleAddress) {
-        address = reinterpret_cast<uintptr_t>(symbol_info.address);
-      } else {
-        assert(false && "VDSO returned invalid address");
-      }
-    }
-  }
-#endif
-
-  memoized.store(address, std::memory_order_relaxed);
-  return reinterpret_cast<const unsigned char *>(address);
-}
-#endif  // __linux__
-
 // Compute the size of a stack frame in [low..high).  We assume that low < high.
 // Return size of kUnknownFrameSize.
 template <typename T>
@@ -96,7 +54,8 @@ static inline uintptr_t ComputeStackFrameSize(const T *low, const T *high) {
 template <bool STRICT_UNWINDING, bool WITH_CONTEXT>
 ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
 ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-static void ** NextStackFrame(void **old_frame_pointer, const void *uc) {
+static void ** NextStackFrame(void **old_frame_pointer, const void *uc,
+                              const std::pair<size_t, size_t> range) {
   //               .
   //               .
   //               .
@@ -114,55 +73,43 @@ static void ** NextStackFrame(void **old_frame_pointer, const void *uc) {
   // $sp ->|      ...       |
   //       +----------------+
   void **new_frame_pointer = reinterpret_cast<void **>(old_frame_pointer[-2]);
-  bool check_frame_size = true;
-
-#if defined(__linux__)
-  if (WITH_CONTEXT && uc != nullptr) {
-    // Check to see if next frame's return address is __kernel_rt_sigreturn.
-    if (old_frame_pointer[-1] == GetKernelRtSigreturnAddress()) {
-      const ucontext_t *ucv = static_cast<const ucontext_t *>(uc);
-      // old_frame_pointer is not suitable for unwinding, look at ucontext to
-      // discover frame pointer before signal.
-      //
-      // RISCV ELF psABI has the frame pointer at x8/fp/s0.
-      // -- RISCV psABI Table 18.2
-      void **const pre_signal_frame_pointer =
-          reinterpret_cast<void **>(ucv->uc_mcontext.__gregs[8]);
-
-      // Check the alleged frame pointer is actually readable. This is to
-      // prevent "double fault" in case we hit the first fault due to stack
-      // corruption.
-      if (!absl::debugging_internal::AddressIsReadable(
-              pre_signal_frame_pointer))
-        return nullptr;
-
-      // Alleged frame pointer is readable, use it for further unwinding.
-      new_frame_pointer = pre_signal_frame_pointer;
-
-      // Skip frame size check if we return from a signal.  We may be using an
-      // alterate stack for signals.
-      check_frame_size = false;
-    }
-  }
-#endif
+  uintptr_t frame_pointer = reinterpret_cast<uintptr_t>(new_frame_pointer);
 
   // The RISCV ELF psABI mandates that the stack pointer is always 16-byte
   // aligned.
-  // FIXME(abdulras) this doesn't hold for ILP32E which only mandates a 4-byte
+  // TODO(#1236) this doesn't hold for ILP32E which only mandates a 4-byte
   // alignment.
-  if ((reinterpret_cast<uintptr_t>(new_frame_pointer) & 15) != 0)
+  if (frame_pointer & 15)
     return nullptr;
 
+  // If the new frame pointer matches the signal context, avoid terminating
+  // early to deal with alternate signal stacks.
+  if (WITH_CONTEXT)
+    if (const ucontext_t *ucv = static_cast<const ucontext_t *>(uc))
+      // RISCV ELF psABI has the frame pointer at x8/fp/s0.
+      // -- RISCV psABI Table 18.2
+      if (ucv->uc_mcontext.__gregs[8] == frame_pointer)
+        return new_frame_pointer;
+
   // Check frame size.  In strict mode, we assume frames to be under 100,000
   // bytes.  In non-strict mode, we relax the limit to 1MB.
-  if (check_frame_size) {
-    const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
-    const uintptr_t frame_size =
-        ComputeStackFrameSize(old_frame_pointer, new_frame_pointer);
-    if (frame_size == kUnknownFrameSize || frame_size > max_size)
+  const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
+  const uintptr_t frame_size =
+      ComputeStackFrameSize(old_frame_pointer, new_frame_pointer);
+  if (frame_size == kUnknownFrameSize) {
+    if (STRICT_UNWINDING)
+      return nullptr;
+
+    // In non-strict mode permit non-contiguous stacks (e.g. alternate signal
+    // frame handling).
+    if (reinterpret_cast<uintptr_t>(new_frame_pointer) < range.first ||
+        reinterpret_cast<uintptr_t>(new_frame_pointer) > range.second)
       return nullptr;
   }
 
+  if (frame_size > max_size)
+    return nullptr;
+
   return new_frame_pointer;
 }
 
@@ -171,55 +118,65 @@ ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
 ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
 static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
                       const void *ucp, int *min_dropped_frames) {
+  // The `frame_pointer` that is computed here points to the top of the frame.
+  // The two words preceding the address are the return address and the previous
+  // frame pointer.
 #if defined(__GNUC__)
   void **frame_pointer = reinterpret_cast<void **>(__builtin_frame_address(0));
 #else
 #error reading stack pointer not yet supported on this platform
 #endif
 
-  skip_count++;  // Skip the frame for this function.
-  int n = 0;
-
-  // The `frame_pointer` that is computed here points to the top of the frame.
-  // The two words preceding the address are the return address and the previous
-  // frame pointer.  To find a PC value associated with the current frame, we
-  // need to go down a level in the call chain.  So we remember the return
-  // address of the last frame seen.  This does not work for the first stack
-  // frame, which belongs to `UnwindImp()` but we skip the frame for
-  // `UnwindImp()` anyway.
-  void *prev_return_address = nullptr;
+  std::pair<size_t, size_t> stack = {
+      // assume that the first page is not the stack.
+      static_cast<size_t>(sysconf(_SC_PAGESIZE)),
+      std::numeric_limits<size_t>::max() - sizeof(void *)
+  };
 
+  int n = 0;
+  void *return_address = nullptr;
   while (frame_pointer && n < max_depth) {
-    // The absl::GetStackFrames routine si called when we are in some
+    return_address = frame_pointer[-1];
+
+    // The absl::GetStackFrames routine is called when we are in some
     // informational context (the failure signal handler for example).  Use the
     // non-strict unwinding rules to produce a stack trace that is as complete
     // as possible (even if it contains a few bogus entries in some rare cases).
     void **next_frame_pointer =
-        NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
+        NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp,
+                                                          stack);
 
     if (skip_count > 0) {
       skip_count--;
     } else {
-      result[n] = prev_return_address;
+      result[n] = return_address;
       if (IS_STACK_FRAMES) {
         sizes[n] = ComputeStackFrameSize(frame_pointer, next_frame_pointer);
       }
       n++;
     }
-    prev_return_address = frame_pointer[-1];
+
     frame_pointer = next_frame_pointer;
   }
+
   if (min_dropped_frames != nullptr) {
     // Implementation detail: we clamp the max of frames we are willing to
     // count, so as not to spend too much time in the loop below.
     const int kMaxUnwind = 200;
-    int j = 0;
-    for (; frame_pointer != nullptr && j < kMaxUnwind; j++) {
+    int num_dropped_frames = 0;
+    for (int j = 0; frame_pointer != nullptr && j < kMaxUnwind; j++) {
+      if (skip_count > 0) {
+        skip_count--;
+      } else {
+        num_dropped_frames++;
+      }
       frame_pointer =
-          NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
+          NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp,
+                                                            stack);
     }
-    *min_dropped_frames = j;
+    *min_dropped_frames = num_dropped_frames;
   }
+
   return n;
 }
 
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_win32-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_win32-inl.inc
index 1c666c8b56..ef2b973ec3 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_win32-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_win32-inl.inc
@@ -63,11 +63,12 @@ static RtlCaptureStackBackTrace_Function* const RtlCaptureStackBackTrace_fn =
 template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
 static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
                       const void*, int* min_dropped_frames) {
-  int n = 0;
-  if (!RtlCaptureStackBackTrace_fn) {
-    // can't find a stacktrace with no function to call
+  USHORT n = 0;
+  if (!RtlCaptureStackBackTrace_fn || skip_count < 0 || max_depth < 0) {
+    // can't get a stacktrace with no function/invalid args
   } else {
-    n = (int)RtlCaptureStackBackTrace_fn(skip_count + 2, max_depth, result, 0);
+    n = RtlCaptureStackBackTrace_fn(static_cast<ULONG>(skip_count) + 2,
+                                    static_cast<ULONG>(max_depth), result, 0);
   }
   if (IS_STACK_FRAMES) {
     // No implementation for finding out the stack frame sizes yet.
diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_x86-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_x86-inl.inc
index 847a547359..9fbfcf767a 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_x86-inl.inc
+++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_x86-inl.inc
@@ -35,8 +35,6 @@
 #include "absl/debugging/internal/vdso_support.h"  // a no-op on non-elf or non-glibc systems
 #include "absl/debugging/stacktrace.h"
 
-#include "absl/base/internal/raw_logging.h"
-
 using absl::debugging_internal::AddressIsReadable;
 
 #if defined(__linux__) && defined(__i386__)
@@ -140,13 +138,14 @@ static uintptr_t GetFP(const void *vuc) {
     // TODO(bcmills): -momit-leaf-frame-pointer is currently the default
     // behavior when building with clang.  Talk to the C++ toolchain team about
     // fixing that.
-    if (bp >= sp && bp - sp <= kMaxFrameBytes) return bp;
+    if (bp >= sp && bp - sp <= kMaxFrameBytes)
+      return static_cast<uintptr_t>(bp);
 
     // If bp isn't a plausible frame pointer, return the stack pointer instead.
     // If we're lucky, it points to the start of a stack frame; otherwise, we'll
     // get one frame of garbage in the stack trace and fail the sanity check on
     // the next iteration.
-    return sp;
+    return static_cast<uintptr_t>(sp);
   }
 #endif
   return 0;
@@ -310,7 +309,8 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
   int n = 0;
   void **fp = reinterpret_cast<void **>(__builtin_frame_address(0));
 
-  size_t stack_low = getpagesize();  // Assume that the first page is not stack.
+  // Assume that the first page is not stack.
+  size_t stack_low = static_cast<size_t>(getpagesize());
   size_t stack_high = std::numeric_limits<size_t>::max() - sizeof(void *);
 
   while (fp && n < max_depth) {
@@ -327,7 +327,9 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
       result[n] = *(fp + 1);
       if (IS_STACK_FRAMES) {
         if (next_fp > fp) {
-          sizes[n] = (uintptr_t)next_fp - (uintptr_t)fp;
+          sizes[n] = static_cast<int>(
+              reinterpret_cast<uintptr_t>(next_fp) -
+              reinterpret_cast<uintptr_t>(fp));
         } else {
           // A frame-size of 0 is used to indicate unknown frame size.
           sizes[n] = 0;
@@ -341,12 +343,17 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
     // Implementation detail: we clamp the max of frames we are willing to
     // count, so as not to spend too much time in the loop below.
     const int kMaxUnwind = 1000;
-    int j = 0;
-    for (; fp != nullptr && j < kMaxUnwind; j++) {
+    int num_dropped_frames = 0;
+    for (int j = 0; fp != nullptr && j < kMaxUnwind; j++) {
+      if (skip_count > 0) {
+        skip_count--;
+      } else {
+        num_dropped_frames++;
+      }
       fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(fp, ucp, stack_low,
                                                              stack_high);
     }
-    *min_dropped_frames = j;
+    *min_dropped_frames = num_dropped_frames;
   }
   return n;
 }
diff --git a/third_party/abseil-cpp/absl/debugging/internal/vdso_support.cc b/third_party/abseil-cpp/absl/debugging/internal/vdso_support.cc
index 977a9f6b3c..8a588eaffe 100644
--- a/third_party/abseil-cpp/absl/debugging/internal/vdso_support.cc
+++ b/third_party/abseil-cpp/absl/debugging/internal/vdso_support.cc
@@ -33,7 +33,7 @@
 #endif
 #include <unistd.h>
 
-#if defined(__GLIBC__) && \
+#if !defined(__UCLIBC__) && defined(__GLIBC__) && \
     (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 16))
 #define ABSL_HAVE_GETAUXVAL
 #endif
@@ -50,8 +50,14 @@
 #define AT_SYSINFO_EHDR 33  // for crosstoolv10
 #endif
 
+#if defined(__NetBSD__)
+using Elf32_auxv_t = Aux32Info;
+using Elf64_auxv_t = Aux64Info;
+#endif
 #if defined(__FreeBSD__)
+#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
 using Elf64_auxv_t = Elf64_Auxinfo;
+#endif
 using Elf32_auxv_t = Elf32_Auxinfo;
 #endif
 
@@ -63,7 +69,9 @@ ABSL_CONST_INIT
 std::atomic<const void *> VDSOSupport::vdso_base_(
     debugging_internal::ElfMemImage::kInvalidBase);
 
-std::atomic<VDSOSupport::GetCpuFn> VDSOSupport::getcpu_fn_(&InitAndGetCPU);
+ABSL_CONST_INIT std::atomic<VDSOSupport::GetCpuFn> VDSOSupport::getcpu_fn_(
+    &InitAndGetCPU);
+
 VDSOSupport::VDSOSupport()
     // If vdso_base_ is still set to kInvalidBase, we got here
     // before VDSOSupport::Init has been called. Call it now.
@@ -104,8 +112,13 @@ const void *VDSOSupport::Init() {
     ElfW(auxv_t) aux;
     while (read(fd, &aux, sizeof(aux)) == sizeof(aux)) {
       if (aux.a_type == AT_SYSINFO_EHDR) {
+#if defined(__NetBSD__)
+        vdso_base_.store(reinterpret_cast<void *>(aux.a_v),
+                         std::memory_order_relaxed);
+#else
         vdso_base_.store(reinterpret_cast<void *>(aux.a_un.a_val),
                          std::memory_order_relaxed);
+#endif
         break;
       }
     }
@@ -180,8 +193,9 @@ long VDSOSupport::InitAndGetCPU(unsigned *cpu,  // NOLINT(runtime/int)
 ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY
 int GetCPU() {
   unsigned cpu;
-  int ret_code = (*VDSOSupport::getcpu_fn_)(&cpu, nullptr, nullptr);
-  return ret_code == 0 ? cpu : ret_code;
+  long ret_code =  // NOLINT(runtime/int)
+      (*VDSOSupport::getcpu_fn_)(&cpu, nullptr, nullptr);
+  return ret_code == 0 ? static_cast<int>(cpu) : static_cast<int>(ret_code);
 }
 
 }  // namespace debugging_internal
diff --git a/third_party/abseil-cpp/absl/debugging/leak_check.cc b/third_party/abseil-cpp/absl/debugging/leak_check.cc
index 764ca0ad00..195e82bf16 100644
--- a/third_party/abseil-cpp/absl/debugging/leak_check.cc
+++ b/third_party/abseil-cpp/absl/debugging/leak_check.cc
@@ -11,29 +11,19 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-
+//
 // Wrappers around lsan_interface functions.
-// When lsan is not linked in, these functions are not available,
-// therefore Abseil code which depends on these functions is conditioned on the
-// definition of LEAK_SANITIZER.
-#include "absl/base/attributes.h"
-#include "absl/debugging/leak_check.h"
+//
+// These are always-available run-time functions manipulating the LeakSanitizer,
+// even when the lsan_interface (and LeakSanitizer) is not available. When
+// LeakSanitizer is not linked in, these functions become no-op stubs.
 
-#ifndef LEAK_SANITIZER
+#include "absl/debugging/leak_check.h"
 
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-bool HaveLeakSanitizer() { return false; }
-bool LeakCheckerIsActive() { return false; }
-void DoIgnoreLeak(const void*) { }
-void RegisterLivePointers(const void*, size_t) { }
-void UnRegisterLivePointers(const void*, size_t) { }
-LeakCheckDisabler::LeakCheckDisabler() { }
-LeakCheckDisabler::~LeakCheckDisabler() { }
-ABSL_NAMESPACE_END
-}  // namespace absl
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
 
-#else
+#if defined(ABSL_HAVE_LEAK_SANITIZER)
 
 #include <sanitizer/lsan_interface.h>
 
@@ -66,4 +56,18 @@ LeakCheckDisabler::~LeakCheckDisabler() { __lsan_enable(); }
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // LEAK_SANITIZER
+#else  // defined(ABSL_HAVE_LEAK_SANITIZER)
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+bool HaveLeakSanitizer() { return false; }
+bool LeakCheckerIsActive() { return false; }
+void DoIgnoreLeak(const void*) { }
+void RegisterLivePointers(const void*, size_t) { }
+void UnRegisterLivePointers(const void*, size_t) { }
+LeakCheckDisabler::LeakCheckDisabler() { }
+LeakCheckDisabler::~LeakCheckDisabler() { }
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // defined(ABSL_HAVE_LEAK_SANITIZER)
diff --git a/third_party/abseil-cpp/absl/debugging/leak_check.h b/third_party/abseil-cpp/absl/debugging/leak_check.h
index 5fc2b052e4..eff162f67f 100644
--- a/third_party/abseil-cpp/absl/debugging/leak_check.h
+++ b/third_party/abseil-cpp/absl/debugging/leak_check.h
@@ -24,7 +24,24 @@
 // Note: this leak checking API is not yet supported in MSVC.
 // Leak checking is enabled by default in all ASan builds.
 //
-// See https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer
+// https://clang.llvm.org/docs/LeakSanitizer.html
+// https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer
+//
+// GCC and Clang both automatically enable LeakSanitizer when AddressSanitizer
+// is enabled. To use the mode, simply pass `-fsanitize=address` to both the
+// compiler and linker. An example Bazel command could be
+//
+//   $ bazel test --copt=-fsanitize=address --linkopt=-fsanitize=address ...
+//
+// GCC and Clang auto support a standalone LeakSanitizer mode (a mode which does
+// not also use AddressSanitizer). To use the mode, simply pass
+// `-fsanitize=leak` to both the compiler and linker. Since GCC does not
+// currently provide a way of detecting this mode at compile-time, GCC users
+// must also pass -DLEAK_SANIITIZER to the compiler. An example Bazel command
+// could be
+//
+//   $ bazel test --copt=-DLEAK_SANITIZER --copt=-fsanitize=leak
+//     --linkopt=-fsanitize=leak ...
 //
 // -----------------------------------------------------------------------------
 #ifndef ABSL_DEBUGGING_LEAK_CHECK_H_
diff --git a/third_party/abseil-cpp/absl/debugging/leak_check_test.cc b/third_party/abseil-cpp/absl/debugging/leak_check_test.cc
index 9fcfc8e50b..6a42e31bad 100644
--- a/third_party/abseil-cpp/absl/debugging/leak_check_test.cc
+++ b/third_party/abseil-cpp/absl/debugging/leak_check_test.cc
@@ -15,27 +15,24 @@
 #include <string>
 
 #include "gtest/gtest.h"
+#include "absl/base/config.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/debugging/leak_check.h"
 
 namespace {
 
-TEST(LeakCheckTest, DetectLeakSanitizer) {
-#ifdef ABSL_EXPECT_LEAK_SANITIZER
-  EXPECT_TRUE(absl::HaveLeakSanitizer());
-  EXPECT_TRUE(absl::LeakCheckerIsActive());
-#else
-  EXPECT_FALSE(absl::HaveLeakSanitizer());
-  EXPECT_FALSE(absl::LeakCheckerIsActive());
-#endif
-}
-
 TEST(LeakCheckTest, IgnoreLeakSuppressesLeakedMemoryErrors) {
+  if (!absl::LeakCheckerIsActive()) {
+    GTEST_SKIP() << "LeakChecker is not active";
+  }
   auto foo = absl::IgnoreLeak(new std::string("some ignored leaked string"));
   ABSL_RAW_LOG(INFO, "Ignoring leaked string %s", foo->c_str());
 }
 
 TEST(LeakCheckTest, LeakCheckDisablerIgnoresLeak) {
+  if (!absl::LeakCheckerIsActive()) {
+    GTEST_SKIP() << "LeakChecker is not active";
+  }
   absl::LeakCheckDisabler disabler;
   auto foo = new std::string("some string leaked while checks are disabled");
   ABSL_RAW_LOG(INFO, "Ignoring leaked string %s", foo->c_str());
diff --git a/third_party/abseil-cpp/absl/debugging/stacktrace_benchmark.cc b/third_party/abseil-cpp/absl/debugging/stacktrace_benchmark.cc
new file mode 100644
index 0000000000..9360bafe34
--- /dev/null
+++ b/third_party/abseil-cpp/absl/debugging/stacktrace_benchmark.cc
@@ -0,0 +1,55 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+#include "absl/debugging/stacktrace.h"
+#include "benchmark/benchmark.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace {
+
+static constexpr int kMaxStackDepth = 100;
+static constexpr int kCacheSize = (1 << 16);
+void* pcs[kMaxStackDepth];
+
+ABSL_ATTRIBUTE_NOINLINE void func(benchmark::State& state, int x, int depth) {
+  if (x <= 0) {
+    // Touch a significant amount of memory so that the stack is likely to be
+    // not cached in the L1 cache.
+    state.PauseTiming();
+    int* arr = new int[kCacheSize];
+    for (int i = 0; i < kCacheSize; ++i) benchmark::DoNotOptimize(arr[i] = 100);
+    delete[] arr;
+    state.ResumeTiming();
+    benchmark::DoNotOptimize(absl::GetStackTrace(pcs, depth, 0));
+    return;
+  }
+  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
+  func(state, --x, depth);
+}
+
+void BM_GetStackTrace(benchmark::State& state) {
+  int depth = state.range(0);
+  for (auto s : state) {
+    func(state, depth, depth);
+  }
+}
+
+BENCHMARK(BM_GetStackTrace)->DenseRange(10, kMaxStackDepth, 10);
+}  // namespace
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/debugging/symbolize.cc b/third_party/abseil-cpp/absl/debugging/symbolize.cc
index f1abdfda59..638d3954ae 100644
--- a/third_party/abseil-cpp/absl/debugging/symbolize.cc
+++ b/third_party/abseil-cpp/absl/debugging/symbolize.cc
@@ -23,6 +23,11 @@
 #endif
 #endif
 
+// Emscripten symbolization relies on JS. Do not use them in standalone mode.
+#if defined(__EMSCRIPTEN__) && !defined(STANDALONE_WASM)
+#define ABSL_INTERNAL_HAVE_SYMBOLIZE_WASM
+#endif
+
 #if defined(ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE)
 #include "absl/debugging/symbolize_elf.inc"
 #elif defined(ABSL_INTERNAL_HAVE_SYMBOLIZE_WIN32)
@@ -31,7 +36,7 @@
 #include "absl/debugging/symbolize_win32.inc"
 #elif defined(__APPLE__)
 #include "absl/debugging/symbolize_darwin.inc"
-#elif defined(__EMSCRIPTEN__)
+#elif defined(ABSL_INTERNAL_HAVE_SYMBOLIZE_WASM)
 #include "absl/debugging/symbolize_emscripten.inc"
 #else
 #include "absl/debugging/symbolize_unimplemented.inc"
diff --git a/third_party/abseil-cpp/absl/debugging/symbolize_darwin.inc b/third_party/abseil-cpp/absl/debugging/symbolize_darwin.inc
index 443ce9efc4..cf63d1919b 100644
--- a/third_party/abseil-cpp/absl/debugging/symbolize_darwin.inc
+++ b/third_party/abseil-cpp/absl/debugging/symbolize_darwin.inc
@@ -83,13 +83,14 @@ bool Symbolize(const void* pc, char* out, int out_size) {
       memmove(out, tmp_buf, len + 1);
     }
   } else {
-    strncpy(out, symbol.c_str(), out_size);
+    strncpy(out, symbol.c_str(), static_cast<size_t>(out_size));
   }
 
   if (out[out_size - 1] != '\0') {
     // strncpy() does not '\0' terminate when it truncates.
     static constexpr char kEllipsis[] = "...";
-    int ellipsis_size = std::min<int>(sizeof(kEllipsis) - 1, out_size - 1);
+    size_t ellipsis_size =
+        std::min(sizeof(kEllipsis) - 1, static_cast<size_t>(out_size) - 1);
     memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
     out[out_size - 1] = '\0';
   }
diff --git a/third_party/abseil-cpp/absl/debugging/symbolize_elf.inc b/third_party/abseil-cpp/absl/debugging/symbolize_elf.inc
index 3ff343d64f..ffb4eecfb9 100644
--- a/third_party/abseil-cpp/absl/debugging/symbolize_elf.inc
+++ b/third_party/abseil-cpp/absl/debugging/symbolize_elf.inc
@@ -205,7 +205,8 @@ struct ObjFile {
 
   // PT_LOAD program header describing executable code.
   // Normally we expect just one, but SWIFT binaries have two.
-  std::array<ElfW(Phdr), 2> phdr;
+  // CUDA binaries have 3 (see cr/473913254 description).
+  std::array<ElfW(Phdr), 4> phdr;
 };
 
 // Build 4-way associative cache for symbols. Within each cache line, symbols
@@ -252,21 +253,21 @@ class AddrMap {
  public:
   AddrMap() : size_(0), allocated_(0), obj_(nullptr) {}
   ~AddrMap() { base_internal::LowLevelAlloc::Free(obj_); }
-  int Size() const { return size_; }
-  ObjFile *At(int i) { return &obj_[i]; }
+  size_t Size() const { return size_; }
+  ObjFile *At(size_t i) { return &obj_[i]; }
   ObjFile *Add();
   void Clear();
 
  private:
-  int size_;       // count of valid elements (<= allocated_)
-  int allocated_;  // count of allocated elements
-  ObjFile *obj_;   // array of allocated_ elements
+  size_t size_;       // count of valid elements (<= allocated_)
+  size_t allocated_;  // count of allocated elements
+  ObjFile *obj_;      // array of allocated_ elements
   AddrMap(const AddrMap &) = delete;
   AddrMap &operator=(const AddrMap &) = delete;
 };
 
 void AddrMap::Clear() {
-  for (int i = 0; i != size_; i++) {
+  for (size_t i = 0; i != size_; i++) {
     At(i)->~ObjFile();
   }
   size_ = 0;
@@ -274,7 +275,7 @@ void AddrMap::Clear() {
 
 ObjFile *AddrMap::Add() {
   if (size_ == allocated_) {
-    int new_allocated = allocated_ * 2 + 50;
+    size_t new_allocated = allocated_ * 2 + 50;
     ObjFile *new_obj_ =
         static_cast<ObjFile *>(base_internal::LowLevelAlloc::AllocWithArena(
             new_allocated * sizeof(*new_obj_), SigSafeArena()));
@@ -300,7 +301,7 @@ class Symbolizer {
 
  private:
   char *CopyString(const char *s) {
-    int len = strlen(s);
+    size_t len = strlen(s);
     char *dst = static_cast<char *>(
         base_internal::LowLevelAlloc::AllocWithArena(len + 1, SigSafeArena()));
     ABSL_RAW_CHECK(dst != nullptr, "out of memory");
@@ -321,8 +322,9 @@ class Symbolizer {
   FindSymbolResult GetSymbolFromObjectFile(const ObjFile &obj,
                                            const void *const pc,
                                            const ptrdiff_t relocation,
-                                           char *out, int out_size,
-                                           char *tmp_buf, int tmp_buf_size);
+                                           char *out, size_t out_size,
+                                           char *tmp_buf, size_t tmp_buf_size);
+  const char *GetUncachedSymbol(const void *pc);
 
   enum {
     SYMBOL_BUF_SIZE = 3072,
@@ -352,11 +354,11 @@ static std::atomic<Symbolizer *> g_cached_symbolizer;
 
 }  // namespace
 
-static int SymbolizerSize() {
+static size_t SymbolizerSize() {
 #if defined(__wasm__) || defined(__asmjs__)
-  int pagesize = getpagesize();
+  auto pagesize = static_cast<size_t>(getpagesize());
 #else
-  int pagesize = sysconf(_SC_PAGESIZE);
+  auto pagesize = static_cast<size_t>(sysconf(_SC_PAGESIZE));
 #endif
   return ((sizeof(Symbolizer) - 1) / pagesize + 1) * pagesize;
 }
@@ -428,7 +430,7 @@ static ssize_t ReadPersistent(int fd, void *buf, size_t count) {
     if (len == 0) {  // Reached EOF.
       break;
     }
-    num_bytes += len;
+    num_bytes += static_cast<size_t>(len);
   }
   SAFE_ASSERT(num_bytes <= count);
   return static_cast<ssize_t>(num_bytes);
@@ -441,8 +443,8 @@ static ssize_t ReadFromOffset(const int fd, void *buf, const size_t count,
                               const off_t offset) {
   off_t off = lseek(fd, offset, SEEK_SET);
   if (off == (off_t)-1) {
-    ABSL_RAW_LOG(WARNING, "lseek(%d, %ju, SEEK_SET) failed: errno=%d", fd,
-                 static_cast<uintmax_t>(offset), errno);
+    ABSL_RAW_LOG(WARNING, "lseek(%d, %jd, SEEK_SET) failed: errno=%d", fd,
+                 static_cast<intmax_t>(offset), errno);
     return -1;
   }
   return ReadPersistent(fd, buf, count);
@@ -477,29 +479,37 @@ static int FileGetElfType(const int fd) {
 // inlined.
 static ABSL_ATTRIBUTE_NOINLINE bool GetSectionHeaderByType(
     const int fd, ElfW(Half) sh_num, const off_t sh_offset, ElfW(Word) type,
-    ElfW(Shdr) * out, char *tmp_buf, int tmp_buf_size) {
+    ElfW(Shdr) * out, char *tmp_buf, size_t tmp_buf_size) {
   ElfW(Shdr) *buf = reinterpret_cast<ElfW(Shdr) *>(tmp_buf);
-  const int buf_entries = tmp_buf_size / sizeof(buf[0]);
-  const int buf_bytes = buf_entries * sizeof(buf[0]);
+  const size_t buf_entries = tmp_buf_size / sizeof(buf[0]);
+  const size_t buf_bytes = buf_entries * sizeof(buf[0]);
 
-  for (int i = 0; i < sh_num;) {
-    const ssize_t num_bytes_left = (sh_num - i) * sizeof(buf[0]);
-    const ssize_t num_bytes_to_read =
+  for (size_t i = 0; static_cast<int>(i) < sh_num;) {
+    const size_t num_bytes_left =
+        (static_cast<size_t>(sh_num) - i) * sizeof(buf[0]);
+    const size_t num_bytes_to_read =
         (buf_bytes > num_bytes_left) ? num_bytes_left : buf_bytes;
-    const off_t offset = sh_offset + i * sizeof(buf[0]);
+    const off_t offset = sh_offset + static_cast<off_t>(i * sizeof(buf[0]));
     const ssize_t len = ReadFromOffset(fd, buf, num_bytes_to_read, offset);
-    if (len % sizeof(buf[0]) != 0) {
+    if (len < 0) {
       ABSL_RAW_LOG(
           WARNING,
-          "Reading %zd bytes from offset %ju returned %zd which is not a "
+          "Reading %zu bytes from offset %ju returned %zd which is negative.",
+          num_bytes_to_read, static_cast<intmax_t>(offset), len);
+      return false;
+    }
+    if (static_cast<size_t>(len) % sizeof(buf[0]) != 0) {
+      ABSL_RAW_LOG(
+          WARNING,
+          "Reading %zu bytes from offset %jd returned %zd which is not a "
           "multiple of %zu.",
-          num_bytes_to_read, static_cast<uintmax_t>(offset), len,
+          num_bytes_to_read, static_cast<intmax_t>(offset), len,
           sizeof(buf[0]));
       return false;
     }
-    const ssize_t num_headers_in_buf = len / sizeof(buf[0]);
+    const size_t num_headers_in_buf = static_cast<size_t>(len) / sizeof(buf[0]);
     SAFE_ASSERT(num_headers_in_buf <= buf_entries);
-    for (int j = 0; j < num_headers_in_buf; ++j) {
+    for (size_t j = 0; j < num_headers_in_buf; ++j) {
       if (buf[j].sh_type == type) {
         *out = buf[j];
         return true;
@@ -523,8 +533,8 @@ bool ForEachSection(int fd,
   }
 
   ElfW(Shdr) shstrtab;
-  off_t shstrtab_offset =
-      (elf_header.e_shoff + elf_header.e_shentsize * elf_header.e_shstrndx);
+  off_t shstrtab_offset = static_cast<off_t>(elf_header.e_shoff) +
+                          elf_header.e_shentsize * elf_header.e_shstrndx;
   if (!ReadFromOffsetExact(fd, &shstrtab, sizeof(shstrtab), shstrtab_offset)) {
     return false;
   }
@@ -532,22 +542,23 @@ bool ForEachSection(int fd,
   for (int i = 0; i < elf_header.e_shnum; ++i) {
     ElfW(Shdr) out;
     off_t section_header_offset =
-        (elf_header.e_shoff + elf_header.e_shentsize * i);
+        static_cast<off_t>(elf_header.e_shoff) + elf_header.e_shentsize * i;
     if (!ReadFromOffsetExact(fd, &out, sizeof(out), section_header_offset)) {
       return false;
     }
-    off_t name_offset = shstrtab.sh_offset + out.sh_name;
+    off_t name_offset = static_cast<off_t>(shstrtab.sh_offset) + out.sh_name;
     char header_name[kMaxSectionNameLen];
     ssize_t n_read =
         ReadFromOffset(fd, &header_name, kMaxSectionNameLen, name_offset);
-    if (n_read == -1) {
+    if (n_read < 0) {
       return false;
     } else if (n_read > kMaxSectionNameLen) {
       // Long read?
       return false;
     }
 
-    absl::string_view name(header_name, strnlen(header_name, n_read));
+    absl::string_view name(header_name,
+                           strnlen(header_name, static_cast<size_t>(n_read)));
     if (!callback(name, out)) {
       break;
     }
@@ -574,19 +585,19 @@ bool GetSectionHeaderByName(int fd, const char *name, size_t name_len,
   }
 
   ElfW(Shdr) shstrtab;
-  off_t shstrtab_offset =
-      (elf_header.e_shoff + elf_header.e_shentsize * elf_header.e_shstrndx);
+  off_t shstrtab_offset = static_cast<off_t>(elf_header.e_shoff) +
+                          elf_header.e_shentsize * elf_header.e_shstrndx;
   if (!ReadFromOffsetExact(fd, &shstrtab, sizeof(shstrtab), shstrtab_offset)) {
     return false;
   }
 
   for (int i = 0; i < elf_header.e_shnum; ++i) {
     off_t section_header_offset =
-        (elf_header.e_shoff + elf_header.e_shentsize * i);
+        static_cast<off_t>(elf_header.e_shoff) + elf_header.e_shentsize * i;
     if (!ReadFromOffsetExact(fd, out, sizeof(*out), section_header_offset)) {
       return false;
     }
-    off_t name_offset = shstrtab.sh_offset + out->sh_name;
+    off_t name_offset = static_cast<off_t>(shstrtab.sh_offset) + out->sh_name;
     ssize_t n_read = ReadFromOffset(fd, &header_name, name_len, name_offset);
     if (n_read < 0) {
       return false;
@@ -644,10 +655,10 @@ static bool InSection(const void *address, const ElfW(Shdr) * section) {
 }
 
 static const char *ComputeOffset(const char *base, ptrdiff_t offset) {
-  // Note: cast to uintptr_t to avoid undefined behavior when base evaluates to
+  // Note: cast to intptr_t to avoid undefined behavior when base evaluates to
   // zero and offset is non-zero.
-  return reinterpret_cast<const char *>(
-      reinterpret_cast<uintptr_t>(base) + offset);
+  return reinterpret_cast<const char *>(reinterpret_cast<intptr_t>(base) +
+                                        offset);
 }
 
 // Read a symbol table and look for the symbol containing the
@@ -660,18 +671,18 @@ static const char *ComputeOffset(const char *base, ptrdiff_t offset) {
 // To keep stack consumption low, we would like this function to not get
 // inlined.
 static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
-    const void *const pc, const int fd, char *out, int out_size,
+    const void *const pc, const int fd, char *out, size_t out_size,
     ptrdiff_t relocation, const ElfW(Shdr) * strtab, const ElfW(Shdr) * symtab,
-    const ElfW(Shdr) * opd, char *tmp_buf, int tmp_buf_size) {
+    const ElfW(Shdr) * opd, char *tmp_buf, size_t tmp_buf_size) {
   if (symtab == nullptr) {
     return SYMBOL_NOT_FOUND;
   }
 
   // Read multiple symbols at once to save read() calls.
   ElfW(Sym) *buf = reinterpret_cast<ElfW(Sym) *>(tmp_buf);
-  const int buf_entries = tmp_buf_size / sizeof(buf[0]);
+  const size_t buf_entries = tmp_buf_size / sizeof(buf[0]);
 
-  const int num_symbols = symtab->sh_size / symtab->sh_entsize;
+  const size_t num_symbols = symtab->sh_size / symtab->sh_entsize;
 
   // On platforms using an .opd section (PowerPC & IA64), a function symbol
   // has the address of a function descriptor, which contains the real
@@ -686,16 +697,19 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
   ElfW(Sym) best_match;
   SafeMemZero(&best_match, sizeof(best_match));
   bool found_match = false;
-  for (int i = 0; i < num_symbols;) {
-    off_t offset = symtab->sh_offset + i * symtab->sh_entsize;
-    const int num_remaining_symbols = num_symbols - i;
-    const int entries_in_chunk = std::min(num_remaining_symbols, buf_entries);
-    const int bytes_in_chunk = entries_in_chunk * sizeof(buf[0]);
+  for (size_t i = 0; i < num_symbols;) {
+    off_t offset =
+        static_cast<off_t>(symtab->sh_offset + i * symtab->sh_entsize);
+    const size_t num_remaining_symbols = num_symbols - i;
+    const size_t entries_in_chunk =
+        std::min(num_remaining_symbols, buf_entries);
+    const size_t bytes_in_chunk = entries_in_chunk * sizeof(buf[0]);
     const ssize_t len = ReadFromOffset(fd, buf, bytes_in_chunk, offset);
-    SAFE_ASSERT(len % sizeof(buf[0]) == 0);
-    const ssize_t num_symbols_in_buf = len / sizeof(buf[0]);
+    SAFE_ASSERT(len >= 0);
+    SAFE_ASSERT(static_cast<size_t>(len) % sizeof(buf[0]) == 0);
+    const size_t num_symbols_in_buf = static_cast<size_t>(len) / sizeof(buf[0]);
     SAFE_ASSERT(num_symbols_in_buf <= entries_in_chunk);
-    for (int j = 0; j < num_symbols_in_buf; ++j) {
+    for (size_t j = 0; j < num_symbols_in_buf; ++j) {
       const ElfW(Sym) &symbol = buf[j];
 
       // For a DSO, a symbol address is relocated by the loading address.
@@ -712,7 +726,7 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
       // about what encoding is being used; we just want the real start address
       // of the function.
       start_address = reinterpret_cast<const char *>(
-          reinterpret_cast<uintptr_t>(start_address) & ~1);
+          reinterpret_cast<uintptr_t>(start_address) & ~1u);
 #endif
 
       if (deref_function_descriptor_pointer &&
@@ -725,7 +739,8 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
 
       // If pc is inside the .opd section, it points to a function descriptor.
       const size_t size = pc_in_opd ? kFunctionDescriptorSize : symbol.st_size;
-      const void *const end_address = ComputeOffset(start_address, size);
+      const void *const end_address =
+          ComputeOffset(start_address, static_cast<ptrdiff_t>(size));
       if (symbol.st_value != 0 &&  // Skip null value symbols.
           symbol.st_shndx != 0 &&  // Skip undefined symbols.
 #ifdef STT_TLS
@@ -743,16 +758,18 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
   }
 
   if (found_match) {
-    const size_t off = strtab->sh_offset + best_match.st_name;
+    const off_t off =
+        static_cast<off_t>(strtab->sh_offset) + best_match.st_name;
     const ssize_t n_read = ReadFromOffset(fd, out, out_size, off);
     if (n_read <= 0) {
       // This should never happen.
       ABSL_RAW_LOG(WARNING,
-                   "Unable to read from fd %d at offset %zu: n_read = %zd", fd,
-                   off, n_read);
+                   "Unable to read from fd %d at offset %lld: n_read = %zd", fd,
+                   static_cast<long long>(off), n_read);
       return SYMBOL_NOT_FOUND;
     }
-    ABSL_RAW_CHECK(n_read <= out_size, "ReadFromOffset read too much data.");
+    ABSL_RAW_CHECK(static_cast<size_t>(n_read) <= out_size,
+                   "ReadFromOffset read too much data.");
 
     // strtab->sh_offset points into .strtab-like section that contains
     // NUL-terminated strings: '\0foo\0barbaz\0...".
@@ -760,7 +777,7 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
     // sh_offset+st_name points to the start of symbol name, but we don't know
     // how long the symbol is, so we try to read as much as we have space for,
     // and usually over-read (i.e. there is a NUL somewhere before n_read).
-    if (memchr(out, '\0', n_read) == nullptr) {
+    if (memchr(out, '\0', static_cast<size_t>(n_read)) == nullptr) {
       // Either out_size was too small (n_read == out_size and no NUL), or
       // we tried to read past the EOF (n_read < out_size) and .strtab is
       // corrupt (missing terminating NUL; should never happen for valid ELF).
@@ -778,7 +795,7 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
 // See FindSymbol() comment for description of return value.
 FindSymbolResult Symbolizer::GetSymbolFromObjectFile(
     const ObjFile &obj, const void *const pc, const ptrdiff_t relocation,
-    char *out, int out_size, char *tmp_buf, int tmp_buf_size) {
+    char *out, size_t out_size, char *tmp_buf, size_t tmp_buf_size) {
   ElfW(Shdr) symtab;
   ElfW(Shdr) strtab;
   ElfW(Shdr) opd;
@@ -801,13 +818,15 @@ FindSymbolResult Symbolizer::GetSymbolFromObjectFile(
   // Consult a regular symbol table, then fall back to the dynamic symbol table.
   for (const auto symbol_table_type : {SHT_SYMTAB, SHT_DYNSYM}) {
     if (!GetSectionHeaderByType(obj.fd, obj.elf_header.e_shnum,
-                                obj.elf_header.e_shoff, symbol_table_type,
+                                static_cast<off_t>(obj.elf_header.e_shoff),
+                                static_cast<ElfW(Word)>(symbol_table_type),
                                 &symtab, tmp_buf, tmp_buf_size)) {
       continue;
     }
     if (!ReadFromOffsetExact(
             obj.fd, &strtab, sizeof(strtab),
-            obj.elf_header.e_shoff + symtab.sh_link * sizeof(symtab))) {
+            static_cast<off_t>(obj.elf_header.e_shoff +
+                               symtab.sh_link * sizeof(symtab)))) {
       continue;
     }
     const FindSymbolResult rc =
@@ -832,7 +851,7 @@ class FileDescriptor {
 
   ~FileDescriptor() {
     if (fd_ >= 0) {
-      NO_INTR(close(fd_));
+      close(fd_);
     }
   }
 
@@ -849,7 +868,7 @@ class FileDescriptor {
 // and snprintf().
 class LineReader {
  public:
-  explicit LineReader(int fd, char *buf, int buf_len)
+  explicit LineReader(int fd, char *buf, size_t buf_len)
       : fd_(fd),
         buf_len_(buf_len),
         buf_(buf),
@@ -877,12 +896,12 @@ class LineReader {
       bol_ = eol_ + 1;            // Advance to the next line in the buffer.
       SAFE_ASSERT(bol_ <= eod_);  // "bol_" can point to "eod_".
       if (!HasCompleteLine()) {
-        const int incomplete_line_length = eod_ - bol_;
+        const auto incomplete_line_length = static_cast<size_t>(eod_ - bol_);
         // Move the trailing incomplete line to the beginning.
         memmove(buf_, bol_, incomplete_line_length);
         // Read text from file and append it.
         char *const append_pos = buf_ + incomplete_line_length;
-        const int capacity_left = buf_len_ - incomplete_line_length;
+        const size_t capacity_left = buf_len_ - incomplete_line_length;
         const ssize_t num_bytes =
             ReadPersistent(fd_, append_pos, capacity_left);
         if (num_bytes <= 0) {  // EOF or error.
@@ -905,7 +924,8 @@ class LineReader {
 
  private:
   char *FindLineFeed() const {
-    return reinterpret_cast<char *>(memchr(bol_, '\n', eod_ - bol_));
+    return reinterpret_cast<char *>(
+        memchr(bol_, '\n', static_cast<size_t>(eod_ - bol_)));
   }
 
   bool BufferIsEmpty() const { return buf_ == eod_; }
@@ -915,7 +935,7 @@ class LineReader {
   }
 
   const int fd_;
-  const int buf_len_;
+  const size_t buf_len_;
   char *const buf_;
   char *bol_;
   char *eol_;
@@ -933,7 +953,8 @@ static const char *GetHex(const char *start, const char *end,
     int ch = *p;
     if ((ch >= '0' && ch <= '9') || (ch >= 'A' && ch <= 'F') ||
         (ch >= 'a' && ch <= 'f')) {
-      hex = (hex << 4) | (ch < 'A' ? ch - '0' : (ch & 0xF) + 9);
+      hex = (hex << 4) |
+            static_cast<uint64_t>(ch < 'A' ? ch - '0' : (ch & 0xF) + 9);
     } else {  // Encountered the first non-hex character.
       break;
     }
@@ -965,7 +986,7 @@ static bool ShouldUseMapping(const char *const flags) {
 static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap(
     bool (*callback)(const char *filename, const void *const start_addr,
                      const void *const end_addr, uint64_t offset, void *arg),
-    void *arg, void *tmp_buf, int tmp_buf_size) {
+    void *arg, void *tmp_buf, size_t tmp_buf_size) {
   // Use /proc/self/task/<pid>/maps instead of /proc/self/maps. The latter
   // requires kernel to stop all threads, and is significantly slower when there
   // are 1000s of threads.
@@ -1080,10 +1101,10 @@ ObjFile *Symbolizer::FindObjFile(const void *const addr, size_t len) {
       }
     }
 
-    int lo = 0;
-    int hi = addr_map_.Size();
+    size_t lo = 0;
+    size_t hi = addr_map_.Size();
     while (lo < hi) {
-      int mid = (lo + hi) / 2;
+      size_t mid = (lo + hi) / 2;
       if (addr < addr_map_.At(mid)->end_addr) {
         hi = mid;
       } else {
@@ -1105,11 +1126,11 @@ ObjFile *Symbolizer::FindObjFile(const void *const addr, size_t len) {
 }
 
 void Symbolizer::ClearAddrMap() {
-  for (int i = 0; i != addr_map_.Size(); i++) {
+  for (size_t i = 0; i != addr_map_.Size(); i++) {
     ObjFile *o = addr_map_.At(i);
     base_internal::LowLevelAlloc::Free(o->filename);
     if (o->fd >= 0) {
-      NO_INTR(close(o->fd));
+      close(o->fd);
     }
   }
   addr_map_.Clear();
@@ -1125,7 +1146,7 @@ bool Symbolizer::RegisterObjFile(const char *filename,
 
   // Files are supposed to be added in the increasing address order.  Make
   // sure that's the case.
-  int addr_map_size = impl->addr_map_.Size();
+  size_t addr_map_size = impl->addr_map_.Size();
   if (addr_map_size != 0) {
     ObjFile *old = impl->addr_map_.At(addr_map_size - 1);
     if (old->end_addr > end_addr) {
@@ -1145,6 +1166,14 @@ bool Symbolizer::RegisterObjFile(const char *filename,
                      reinterpret_cast<uintptr_t>(old->end_addr), old->filename);
       }
       return true;
+    } else if (old->end_addr == start_addr &&
+               reinterpret_cast<uintptr_t>(old->start_addr) - old->offset ==
+                   reinterpret_cast<uintptr_t>(start_addr) - offset &&
+               strcmp(old->filename, filename) == 0) {
+      // Two contiguous map entries that span a contiguous region of the file,
+      // perhaps because some part of the file was mlock()ed. Combine them.
+      old->end_addr = end_addr;
+      return true;
     }
   }
   ObjFile *obj = impl->addr_map_.Add();
@@ -1161,12 +1190,12 @@ bool Symbolizer::RegisterObjFile(const char *filename,
 // where the input symbol is demangled in-place.
 // To keep stack consumption low, we would like this function to not
 // get inlined.
-static ABSL_ATTRIBUTE_NOINLINE void DemangleInplace(char *out, int out_size,
+static ABSL_ATTRIBUTE_NOINLINE void DemangleInplace(char *out, size_t out_size,
                                                     char *tmp_buf,
-                                                    int tmp_buf_size) {
+                                                    size_t tmp_buf_size) {
   if (Demangle(out, tmp_buf, tmp_buf_size)) {
     // Demangling succeeded. Copy to out if the space allows.
-    int len = strlen(tmp_buf);
+    size_t len = strlen(tmp_buf);
     if (len + 1 <= out_size) {  // +1 for '\0'.
       SAFE_ASSERT(len < tmp_buf_size);
       memmove(out, tmp_buf, len + 1);
@@ -1209,7 +1238,8 @@ const char *Symbolizer::InsertSymbolInCache(const void *const pc,
 
   SymbolCacheLine *line = GetCacheLine(pc);
   uint32_t max_age = 0;
-  int oldest_index = -1;
+  size_t oldest_index = 0;
+  bool found_oldest_index = false;
   for (size_t i = 0; i < ABSL_ARRAYSIZE(line->pc); ++i) {
     if (line->pc[i] == nullptr) {
       AgeSymbols(line);
@@ -1221,11 +1251,12 @@ const char *Symbolizer::InsertSymbolInCache(const void *const pc,
     if (line->age[i] >= max_age) {
       max_age = line->age[i];
       oldest_index = i;
+      found_oldest_index = true;
     }
   }
 
   AgeSymbols(line);
-  ABSL_RAW_CHECK(oldest_index >= 0, "Corrupt cache");
+  ABSL_RAW_CHECK(found_oldest_index, "Corrupt cache");
   base_internal::LowLevelAlloc::Free(line->name[oldest_index]);
   line->pc[oldest_index] = pc;
   line->name[oldest_index] = CopyString(name);
@@ -1294,7 +1325,7 @@ static bool MaybeInitializeObjFile(ObjFile *obj) {
     }
     const int phnum = obj->elf_header.e_phnum;
     const int phentsize = obj->elf_header.e_phentsize;
-    size_t phoff = obj->elf_header.e_phoff;
+    auto phoff = static_cast<off_t>(obj->elf_header.e_phoff);
     size_t num_executable_load_segments = 0;
     for (int j = 0; j < phnum; j++) {
       ElfW(Phdr) phdr;
@@ -1312,8 +1343,9 @@ static bool MaybeInitializeObjFile(ObjFile *obj) {
       if (num_executable_load_segments < obj->phdr.size()) {
         memcpy(&obj->phdr[num_executable_load_segments++], &phdr, sizeof(phdr));
       } else {
-        ABSL_RAW_LOG(WARNING, "%s: too many executable LOAD segments",
-                     obj->filename);
+        ABSL_RAW_LOG(
+            WARNING, "%s: too many executable LOAD segments: %zu >= %zu",
+            obj->filename, num_executable_load_segments, obj->phdr.size());
         break;
       }
     }
@@ -1333,13 +1365,7 @@ static bool MaybeInitializeObjFile(ObjFile *obj) {
 // they are called here as well.
 // To keep stack consumption low, we would like this function to not
 // get inlined.
-const char *Symbolizer::GetSymbol(const void *const pc) {
-  const char *entry = FindSymbolInCache(pc);
-  if (entry != nullptr) {
-    return entry;
-  }
-  symbol_buf_[0] = '\0';
-
+const char *Symbolizer::GetUncachedSymbol(const void *pc) {
   ObjFile *const obj = FindObjFile(pc, 1);
   ptrdiff_t relocation = 0;
   int fd = -1;
@@ -1351,7 +1377,7 @@ const char *Symbolizer::GetSymbol(const void *const pc) {
         //
         // For obj->offset > 0, adjust the relocation since a mapping at offset
         // X in the file will have a start address of [true relocation]+X.
-        relocation = start_addr - obj->offset;
+        relocation = static_cast<ptrdiff_t>(start_addr - obj->offset);
 
         // Note: some binaries have multiple "rx" LOAD segments. We must
         // find the right one.
@@ -1427,6 +1453,42 @@ const char *Symbolizer::GetSymbol(const void *const pc) {
   return InsertSymbolInCache(pc, symbol_buf_);
 }
 
+const char *Symbolizer::GetSymbol(const void *pc) {
+  const char *entry = FindSymbolInCache(pc);
+  if (entry != nullptr) {
+    return entry;
+  }
+  symbol_buf_[0] = '\0';
+
+#ifdef __hppa__
+  {
+    // In some contexts (e.g., return addresses), PA-RISC uses the lowest two
+    // bits of the address to indicate the privilege level. Clear those bits
+    // before trying to symbolize.
+    const auto pc_bits = reinterpret_cast<uintptr_t>(pc);
+    const auto address = pc_bits & ~0x3;
+    entry = GetUncachedSymbol(reinterpret_cast<const void *>(address));
+    if (entry != nullptr) {
+      return entry;
+    }
+
+    // In some contexts, PA-RISC also uses bit 1 of the address to indicate that
+    // this is a cross-DSO function pointer. Such function pointers actually
+    // point to a procedure label, a struct whose first 32-bit (pointer) element
+    // actually points to the function text. With no symbol found for this
+    // address so far, try interpreting it as a cross-DSO function pointer and
+    // see how that goes.
+    if (pc_bits & 0x2) {
+      return GetUncachedSymbol(*reinterpret_cast<const void *const *>(address));
+    }
+
+    return nullptr;
+  }
+#else
+  return GetUncachedSymbol(pc);
+#endif
+}
+
 bool RemoveAllSymbolDecorators(void) {
   if (!g_decorators_mu.TryLock()) {
     // Someone else is using decorators. Get out.
@@ -1490,7 +1552,7 @@ bool RegisterFileMappingHint(const void *start, const void *end, uint64_t offset
     ret = false;
   } else {
     // TODO(ckennelly): Move this into a string copy routine.
-    int len = strlen(filename);
+    size_t len = strlen(filename);
     char *dst = static_cast<char *>(
         base_internal::LowLevelAlloc::AllocWithArena(len + 1, SigSafeArena()));
     ABSL_RAW_CHECK(dst != nullptr, "out of memory");
@@ -1546,16 +1608,17 @@ bool Symbolize(const void *pc, char *out, int out_size) {
   const char *name = s->GetSymbol(pc);
   bool ok = false;
   if (name != nullptr && out_size > 0) {
-    strncpy(out, name, out_size);
+    strncpy(out, name, static_cast<size_t>(out_size));
     ok = true;
-    if (out[out_size - 1] != '\0') {
+    if (out[static_cast<size_t>(out_size) - 1] != '\0') {
       // strncpy() does not '\0' terminate when it truncates.  Do so, with
       // trailing ellipsis.
       static constexpr char kEllipsis[] = "...";
-      int ellipsis_size =
-          std::min(implicit_cast<int>(strlen(kEllipsis)), out_size - 1);
-      memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
-      out[out_size - 1] = '\0';
+      size_t ellipsis_size =
+          std::min(strlen(kEllipsis), static_cast<size_t>(out_size) - 1);
+      memcpy(out + static_cast<size_t>(out_size) - ellipsis_size - 1, kEllipsis,
+             ellipsis_size);
+      out[static_cast<size_t>(out_size) - 1] = '\0';
     }
   }
   debugging_internal::FreeSymbolizer(s);
diff --git a/third_party/abseil-cpp/absl/debugging/symbolize_test.cc b/third_party/abseil-cpp/absl/debugging/symbolize_test.cc
index c710a3da81..3165c6ede1 100644
--- a/third_party/abseil-cpp/absl/debugging/symbolize_test.cc
+++ b/third_party/abseil-cpp/absl/debugging/symbolize_test.cc
@@ -392,12 +392,14 @@ TEST(Symbolize, InstallAndRemoveSymbolDecorators) {
                 DummySymbolDecorator, &c_message),
             0);
 
-  char *address = reinterpret_cast<char *>(1);
-  EXPECT_STREQ("abc", TrySymbolize(address++));
+  // Use addresses 4 and 8 here to ensure that we always use valid addresses
+  // even on systems that require instructions to be 32-bit aligned.
+  char *address = reinterpret_cast<char *>(4);
+  EXPECT_STREQ("abc", TrySymbolize(address));
 
   EXPECT_TRUE(absl::debugging_internal::RemoveSymbolDecorator(ticket_b));
 
-  EXPECT_STREQ("ac", TrySymbolize(address++));
+  EXPECT_STREQ("ac", TrySymbolize(address + 4));
 
   // Cleanup: remove all remaining decorators so other stack traces don't
   // get mystery "ac" decoration.
@@ -481,7 +483,8 @@ void ABSL_ATTRIBUTE_NOINLINE TestWithPCInsideInlineFunction() {
 }
 }
 
-#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target)
+#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target) && \
+    ((__ARM_ARCH >= 7) || !defined(__ARM_PCS_VFP))
 // Test that we correctly identify bounds of Thumb functions on ARM.
 //
 // Thumb functions have the lowest-order bit set in their addresses in the ELF
@@ -500,6 +503,10 @@ void ABSL_ATTRIBUTE_NOINLINE TestWithPCInsideInlineFunction() {
 // bit in the Thumb function's entry point. It will correctly compute the end of
 // the Thumb function, it will find no overlap between the Thumb and ARM
 // functions, and it will return the name of the ARM function.
+//
+// Unfortunately we cannot perform this test on armv6 or lower systems that use
+// the hard float ABI because gcc refuses to compile thumb functions on such
+// systems with a "sorry, unimplemented: Thumb-1 hard-float VFP ABI" error.
 
 __attribute__((target("thumb"))) int ArmThumbOverlapThumb(int x) {
   return x * x * x;
@@ -519,7 +526,8 @@ void ABSL_ATTRIBUTE_NOINLINE TestArmThumbOverlap() {
 #endif
 }
 
-#endif  // defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target)
+#endif  // defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target) && ((__ARM_ARCH >= 7)
+        // || !defined(__ARM_PCS_VFP))
 
 #elif defined(_WIN32)
 #if !defined(ABSL_CONSUME_DLL)
@@ -594,7 +602,8 @@ int main(int argc, char **argv) {
   TestWithPCInsideInlineFunction();
   TestWithPCInsideNonInlineFunction();
   TestWithReturnAddress();
-#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target)
+#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target) && \
+    ((__ARM_ARCH >= 7) || !defined(__ARM_PCS_VFP))
   TestArmThumbOverlap();
 #endif
 #endif
diff --git a/third_party/abseil-cpp/absl/debugging/symbolize_win32.inc b/third_party/abseil-cpp/absl/debugging/symbolize_win32.inc
index c3df46f606..53a099a181 100644
--- a/third_party/abseil-cpp/absl/debugging/symbolize_win32.inc
+++ b/third_party/abseil-cpp/absl/debugging/symbolize_win32.inc
@@ -65,14 +65,15 @@ bool Symbolize(const void* pc, char* out, int out_size) {
   if (!SymFromAddr(process, reinterpret_cast<DWORD64>(pc), nullptr, symbol)) {
     return false;
   }
-  strncpy(out, symbol->Name, out_size);
-  if (out[out_size - 1] != '\0') {
+  const size_t out_size_t = static_cast<size_t>(out_size);
+  strncpy(out, symbol->Name, out_size_t);
+  if (out[out_size_t - 1] != '\0') {
     // strncpy() does not '\0' terminate when it truncates.
     static constexpr char kEllipsis[] = "...";
-    int ellipsis_size =
-        std::min<int>(sizeof(kEllipsis) - 1, out_size - 1);
-    memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
-    out[out_size - 1] = '\0';
+    size_t ellipsis_size =
+        std::min(sizeof(kEllipsis) - 1, out_size_t - 1);
+    memcpy(out + out_size_t - ellipsis_size - 1, kEllipsis, ellipsis_size);
+    out[out_size_t - 1] = '\0';
   }
   return true;
 }
diff --git a/third_party/abseil-cpp/absl/flags/BUILD.bazel b/third_party/abseil-cpp/absl/flags/BUILD.bazel
index d20deab464..3d6d59e6dd 100644
--- a/third_party/abseil-cpp/absl/flags/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/flags/BUILD.bazel
@@ -53,6 +53,7 @@ cc_library(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl/flags:__pkg__",
+        "//absl/log:__pkg__",
     ],
     deps = [
         ":path_util",
@@ -100,6 +101,7 @@ cc_library(
         "//absl/base:log_severity",
         "//absl/strings",
         "//absl/strings:str_format",
+        "//absl/types:optional",
     ],
 )
 
@@ -113,6 +115,9 @@ cc_library(
     ],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//visibility:private",
+    ],
     deps = [
         "//absl/base:config",
         "//absl/base:fast_type_id",
@@ -204,6 +209,7 @@ cc_library(
         "//absl/base",
         "//absl/base:config",
         "//absl/base:core_headers",
+        "//absl/base:dynamic_annotations",
         "//absl/memory",
         "//absl/meta:type_traits",
         "//absl/strings",
@@ -321,6 +327,13 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:android",
+        "no_test:os:ios",
+        "no_test_android",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
     deps = [
         ":commandlineflag",
         ":commandlineflag_internal",
@@ -357,6 +370,13 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:android",
+        "no_test:os:ios",
+        "no_test_android",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
     deps = [
         ":config",
         ":flag",
@@ -418,6 +438,13 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:android",
+        "no_test:os:ios",
+        "no_test_android",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
     deps = [
         ":flag",
         ":parse",
@@ -453,6 +480,7 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = ["no_test_wasm"],
     deps = [
         ":program_name",
         "//absl/strings",
@@ -468,6 +496,13 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:android",
+        "no_test:os:ios",
+        "no_test_android",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
     deps = [
         ":commandlineflag_internal",
         ":flag",
@@ -490,6 +525,7 @@ cc_test(
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     shard_count = 31,
+    tags = ["no_test_wasm"],
     deps = [
         ":flag_internal",
         "//absl/base",
@@ -524,6 +560,13 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:android",
+        "no_test:os:ios",
+        "no_test_android",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
     deps = [
         ":config",
         ":flag",
diff --git a/third_party/abseil-cpp/absl/flags/BUILD.gn b/third_party/abseil-cpp/absl/flags/BUILD.gn
new file mode 100644
index 0000000000..d723883120
--- /dev/null
+++ b/third_party/abseil-cpp/absl/flags/BUILD.gn
@@ -0,0 +1,224 @@
+# Copyright 2019 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("path_util") {
+  public = [ "internal/path_util.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+  visibility = [ ":*" ]
+}
+
+absl_source_set("program_name") {
+  sources = [ "internal/program_name.cc" ]
+  public = [ "internal/program_name.h" ]
+  deps = [
+    ":path_util",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+  visibility = [
+    ":*",
+    "../log:*",
+  ]
+}
+
+# Since absl/flags are only used by some test binaries (e.g. in WebRTC),
+# there is no need to strip flags from mobile platforms binaries.
+# This does not affect Chromium.
+config("absl_flags_config") {
+  defines = [ "ABSL_FLAGS_STRIP_NAMES=0" ]
+}
+
+absl_source_set("config") {
+  sources = [ "usage_config.cc" ]
+  public_configs = [ ":absl_flags_config" ]
+  public = [
+    "config.h",
+    "usage_config.h",
+  ]
+  deps = [
+    ":path_util",
+    ":program_name",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
+
+absl_source_set("marshalling") {
+  sources = [ "marshalling.cc" ]
+  public = [ "marshalling.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+    "//third_party/abseil-cpp/absl/types:optional",
+  ]
+}
+
+absl_source_set("commandlineflag_internal") {
+  visibility = [ ":*" ]
+  public = [ "internal/commandlineflag.h" ]
+  sources = [ "internal/commandlineflag.cc" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:fast_type_id",
+  ]
+}
+
+absl_source_set("commandlineflag") {
+  sources = [ "commandlineflag.cc" ]
+  public = [ "commandlineflag.h" ]
+  deps = [
+    ":commandlineflag_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:fast_type_id",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:optional",
+  ]
+}
+
+absl_source_set("private_handle_accessor") {
+  sources = [ "internal/private_handle_accessor.cc" ]
+  public = [ "internal/private_handle_accessor.h" ]
+  deps = [
+    ":commandlineflag",
+    ":commandlineflag_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+  visibility = [ ":*" ]
+}
+
+absl_source_set("reflection") {
+  sources = [ "reflection.cc" ]
+  public = [
+    "internal/registry.h",
+    "reflection.h",
+  ]
+  deps = [
+    ":commandlineflag",
+    ":commandlineflag_internal",
+    ":config",
+    ":private_handle_accessor",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/container:flat_hash_map",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
+
+absl_source_set("flag_internal") {
+  sources = [ "internal/flag.cc" ]
+  public = [
+    "internal/flag.h",
+    "internal/sequence_lock.h",
+  ]
+  deps = [
+    ":commandlineflag",
+    ":commandlineflag_internal",
+    ":config",
+    ":marshalling",
+    ":reflection",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+  visibility = [
+    ":*",
+    "//third_party/abseil-cpp/absl/base/*",
+  ]
+}
+
+absl_source_set("flag") {
+  sources = [
+    "flag.cc",
+    "internal/flag_msvc.inc",
+  ]
+  public = [
+    "declare.h",
+    "flag.h",
+  ]
+  deps = [
+    ":config",
+    ":flag_internal",
+    ":reflection",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("usage_internal") {
+  sources = [ "internal/usage.cc" ]
+  public = [ "internal/usage.h" ]
+  deps = [
+    ":commandlineflag",
+    ":config",
+    ":flag",
+    ":flag_internal",
+    ":path_util",
+    ":private_handle_accessor",
+    ":program_name",
+    ":reflection",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/container:flat_hash_map",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+  visibility = [ ":*" ]
+}
+
+absl_source_set("usage") {
+  sources = [ "usage.cc" ]
+  public = [ "usage.h" ]
+  deps = [
+    ":usage_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
+
+absl_source_set("parse") {
+  sources = [ "parse.cc" ]
+  public = [
+    "internal/parse.h",
+    "parse.h",
+  ]
+  deps = [
+    ":commandlineflag",
+    ":commandlineflag_internal",
+    ":config",
+    ":flag",
+    ":flag_internal",
+    ":private_handle_accessor",
+    ":program_name",
+    ":reflection",
+    ":usage",
+    ":usage_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/flags/CMakeLists.txt b/third_party/abseil-cpp/absl/flags/CMakeLists.txt
index 7f3298e9dd..3e9d5adff8 100644
--- a/third_party/abseil-cpp/absl/flags/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/flags/CMakeLists.txt
@@ -87,6 +87,7 @@ absl_cc_library(
     absl::config
     absl::core_headers
     absl::log_severity
+    absl::optional
     absl::strings
     absl::str_format
 )
@@ -105,6 +106,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_LINKOPTS}
   DEPS
     absl::config
+    absl::dynamic_annotations
     absl::fast_type_id
 )
 
@@ -464,5 +466,5 @@ absl_cc_test(
     absl::flags_reflection
     absl::flags_usage
     absl::strings
-    GTest::gtest
+    GTest::gmock
 )
diff --git a/third_party/abseil-cpp/absl/flags/config.h b/third_party/abseil-cpp/absl/flags/config.h
index 5ab1f311dc..14c4235bb3 100644
--- a/third_party/abseil-cpp/absl/flags/config.h
+++ b/third_party/abseil-cpp/absl/flags/config.h
@@ -45,14 +45,6 @@
 #define ABSL_FLAGS_STRIP_HELP ABSL_FLAGS_STRIP_NAMES
 #endif
 
-// ABSL_FLAGS_INTERNAL_HAS_RTTI macro is used for selecting if we can use RTTI
-// for flag type identification.
-#ifdef ABSL_FLAGS_INTERNAL_HAS_RTTI
-#error ABSL_FLAGS_INTERNAL_HAS_RTTI cannot be directly set
-#elif !defined(__GNUC__) || defined(__GXX_RTTI)
-#define ABSL_FLAGS_INTERNAL_HAS_RTTI 1
-#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
-
 // These macros represent the "source of truth" for the list of supported
 // built-in types.
 #define ABSL_FLAGS_INTERNAL_BUILTIN_TYPES(A) \
diff --git a/third_party/abseil-cpp/absl/flags/declare.h b/third_party/abseil-cpp/absl/flags/declare.h
index b9794d8b85..d1437bb9f6 100644
--- a/third_party/abseil-cpp/absl/flags/declare.h
+++ b/third_party/abseil-cpp/absl/flags/declare.h
@@ -60,6 +60,14 @@ ABSL_NAMESPACE_END
 // The ABSL_DECLARE_FLAG(type, name) macro expands to:
 //
 //   extern absl::Flag<type> FLAGS_name;
-#define ABSL_DECLARE_FLAG(type, name) extern ::absl::Flag<type> FLAGS_##name
+#define ABSL_DECLARE_FLAG(type, name) ABSL_DECLARE_FLAG_INTERNAL(type, name)
+
+// Internal implementation of ABSL_DECLARE_FLAG to allow macro expansion of its
+// arguments. Clients must use ABSL_DECLARE_FLAG instead.
+#define ABSL_DECLARE_FLAG_INTERNAL(type, name)               \
+  extern absl::Flag<type> FLAGS_##name;                      \
+  namespace absl /* block flags in namespaces */ {}          \
+  /* second redeclaration is to allow applying attributes */ \
+  extern absl::Flag<type> FLAGS_##name
 
 #endif  // ABSL_FLAGS_DECLARE_H_
diff --git a/third_party/abseil-cpp/absl/flags/flag.h b/third_party/abseil-cpp/absl/flags/flag.h
index a724ccc97d..b7f94be7c5 100644
--- a/third_party/abseil-cpp/absl/flags/flag.h
+++ b/third_party/abseil-cpp/absl/flags/flag.h
@@ -67,6 +67,10 @@ ABSL_NAMESPACE_BEGIN
 //      ABSL_FLAG(int, count, 0, "Count of items to process");
 //
 // No public methods of `absl::Flag<T>` are part of the Abseil Flags API.
+//
+// For type support of Abseil Flags, see the marshalling.h header file, which
+// discusses supported standard types, optional flags, and additional Abseil
+// type support.
 #if !defined(_MSC_VER) || defined(__clang__)
 template <typename T>
 using Flag = flags_internal::Flag<T>;
@@ -265,6 +269,7 @@ ABSL_NAMESPACE_END
 // global name for FLAGS_no<flag_name> symbol, thus preventing the possibility
 // of defining two flags with names foo and nofoo.
 #define ABSL_FLAG_IMPL(Type, name, default_value, help)                       \
+  extern ::absl::Flag<Type> FLAGS_##name;                                     \
   namespace absl /* block flags in namespaces */ {}                           \
   ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value)           \
   ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, help)                             \
diff --git a/third_party/abseil-cpp/absl/flags/flag_test.cc b/third_party/abseil-cpp/absl/flags/flag_test.cc
index 6e974a5b5e..845b4ebac6 100644
--- a/third_party/abseil-cpp/absl/flags/flag_test.cc
+++ b/third_party/abseil-cpp/absl/flags/flag_test.cc
@@ -854,7 +854,9 @@ ABSL_RETIRED_FLAG(bool, old_bool_flag, true, "old descr");
 ABSL_RETIRED_FLAG(int, old_int_flag, (int)std::sqrt(10), "old descr");
 ABSL_RETIRED_FLAG(std::string, old_str_flag, "", absl::StrCat("old ", "descr"));
 
-bool initializaion_order_fiasco_test = [] {
+namespace {
+
+bool initialization_order_fiasco_test ABSL_ATTRIBUTE_UNUSED = [] {
   // Iterate over all the flags during static initialization.
   // This should not trigger ASan's initialization-order-fiasco.
   auto* handle1 = absl::FindCommandLineFlag("flag_on_separate_file");
@@ -865,8 +867,6 @@ bool initializaion_order_fiasco_test = [] {
   return true;
 }();
 
-namespace {
-
 TEST_F(FlagTest, TestRetiredFlagRegistration) {
   auto* handle = absl::FindCommandLineFlag("old_bool_flag");
   EXPECT_TRUE(handle->IsOfType<bool>());
@@ -977,3 +977,190 @@ TEST_F(FlagTest, TesTypeWrappingEnum) {
   value = absl::GetFlag(FLAGS_test_enum_wrapper_flag);
   EXPECT_EQ(value.e, B);
 }
+
+// This is a compile test to ensure macros are expanded within ABSL_FLAG and
+// ABSL_DECLARE_FLAG.
+#define FLAG_NAME_MACRO(name) prefix_ ## name
+ABSL_DECLARE_FLAG(int, FLAG_NAME_MACRO(test_macro_named_flag));
+ABSL_FLAG(int, FLAG_NAME_MACRO(test_macro_named_flag), 0,
+          "Testing macro expansion within ABSL_FLAG");
+
+TEST_F(FlagTest, MacroWithinAbslFlag) {
+  EXPECT_EQ(absl::GetFlag(FLAGS_prefix_test_macro_named_flag), 0);
+  absl::SetFlag(&FLAGS_prefix_test_macro_named_flag, 1);
+  EXPECT_EQ(absl::GetFlag(FLAGS_prefix_test_macro_named_flag), 1);
+}
+
+// --------------------------------------------------------------------
+
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ <= 5
+#define ABSL_SKIP_OPTIONAL_BOOL_TEST_DUE_TO_GCC_BUG
+#endif
+
+#ifndef ABSL_SKIP_OPTIONAL_BOOL_TEST_DUE_TO_GCC_BUG
+ABSL_FLAG(absl::optional<bool>, optional_bool, absl::nullopt, "help");
+#endif
+ABSL_FLAG(absl::optional<int>, optional_int, {}, "help");
+ABSL_FLAG(absl::optional<double>, optional_double, 9.3, "help");
+ABSL_FLAG(absl::optional<std::string>, optional_string, absl::nullopt, "help");
+ABSL_FLAG(absl::optional<absl::Duration>, optional_duration, absl::nullopt,
+          "help");
+ABSL_FLAG(absl::optional<absl::optional<int>>, optional_optional_int,
+          absl::nullopt, "help");
+#if defined(ABSL_HAVE_STD_OPTIONAL) && !defined(ABSL_USES_STD_OPTIONAL)
+ABSL_FLAG(std::optional<int64_t>, std_optional_int64, std::nullopt, "help");
+#endif
+
+namespace {
+
+#ifndef ABSL_SKIP_OPTIONAL_BOOL_TEST_DUE_TO_GCC_BUG
+TEST_F(FlagTest, TestOptionalBool) {
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_bool).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_bool), absl::nullopt);
+
+  absl::SetFlag(&FLAGS_optional_bool, false);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_bool).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_bool), false);
+
+  absl::SetFlag(&FLAGS_optional_bool, true);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_bool).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_bool), true);
+
+  absl::SetFlag(&FLAGS_optional_bool, absl::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_bool).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_bool), absl::nullopt);
+}
+
+// --------------------------------------------------------------------
+#endif
+
+TEST_F(FlagTest, TestOptionalInt) {
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_int), absl::nullopt);
+
+  absl::SetFlag(&FLAGS_optional_int, 0);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_int), 0);
+
+  absl::SetFlag(&FLAGS_optional_int, 10);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_int), 10);
+
+  absl::SetFlag(&FLAGS_optional_int, absl::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_int), absl::nullopt);
+}
+
+// --------------------------------------------------------------------
+
+TEST_F(FlagTest, TestOptionalDouble) {
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_double).has_value());
+  EXPECT_DOUBLE_EQ(*absl::GetFlag(FLAGS_optional_double), 9.3);
+
+  absl::SetFlag(&FLAGS_optional_double, 0.0);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_double).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_double), 0.0);
+
+  absl::SetFlag(&FLAGS_optional_double, 1.234);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_double).has_value());
+  EXPECT_DOUBLE_EQ(*absl::GetFlag(FLAGS_optional_double), 1.234);
+
+  absl::SetFlag(&FLAGS_optional_double, absl::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_double).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_double), absl::nullopt);
+}
+
+// --------------------------------------------------------------------
+
+TEST_F(FlagTest, TestOptionalString) {
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_string).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_string), absl::nullopt);
+
+  // Setting optional string to "" leads to undefined behavior.
+
+  absl::SetFlag(&FLAGS_optional_string, " ");
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_string).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_string), " ");
+
+  absl::SetFlag(&FLAGS_optional_string, "QWERTY");
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_string).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_string), "QWERTY");
+
+  absl::SetFlag(&FLAGS_optional_string, absl::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_string).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_string), absl::nullopt);
+}
+
+// --------------------------------------------------------------------
+
+TEST_F(FlagTest, TestOptionalDuration) {
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_duration).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_duration), absl::nullopt);
+
+  absl::SetFlag(&FLAGS_optional_duration, absl::ZeroDuration());
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_duration).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_duration), absl::Seconds(0));
+
+  absl::SetFlag(&FLAGS_optional_duration, absl::Hours(3));
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_duration).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_duration), absl::Hours(3));
+
+  absl::SetFlag(&FLAGS_optional_duration, absl::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_duration).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_duration), absl::nullopt);
+}
+
+// --------------------------------------------------------------------
+
+TEST_F(FlagTest, TestOptionalOptional) {
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_optional_int), absl::nullopt);
+
+  absl::optional<int> nullint{absl::nullopt};
+
+  absl::SetFlag(&FLAGS_optional_optional_int, nullint);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_optional_int).has_value());
+  EXPECT_NE(absl::GetFlag(FLAGS_optional_optional_int), nullint);
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_optional_int),
+            absl::optional<absl::optional<int>>{nullint});
+
+  absl::SetFlag(&FLAGS_optional_optional_int, 0);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_optional_int), 0);
+
+  absl::SetFlag(&FLAGS_optional_optional_int, absl::optional<int>{0});
+  EXPECT_TRUE(absl::GetFlag(FLAGS_optional_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_optional_int), 0);
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_optional_int), absl::optional<int>{0});
+
+  absl::SetFlag(&FLAGS_optional_optional_int, absl::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_optional_optional_int).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_optional_optional_int), absl::nullopt);
+}
+
+// --------------------------------------------------------------------
+
+#if defined(ABSL_HAVE_STD_OPTIONAL) && !defined(ABSL_USES_STD_OPTIONAL)
+
+TEST_F(FlagTest, TestStdOptional) {
+  EXPECT_FALSE(absl::GetFlag(FLAGS_std_optional_int64).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_std_optional_int64), std::nullopt);
+
+  absl::SetFlag(&FLAGS_std_optional_int64, 0);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_std_optional_int64).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_std_optional_int64), 0);
+
+  absl::SetFlag(&FLAGS_std_optional_int64, 0xFFFFFFFFFF16);
+  EXPECT_TRUE(absl::GetFlag(FLAGS_std_optional_int64).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_std_optional_int64), 0xFFFFFFFFFF16);
+
+  absl::SetFlag(&FLAGS_std_optional_int64, std::nullopt);
+  EXPECT_FALSE(absl::GetFlag(FLAGS_std_optional_int64).has_value());
+  EXPECT_EQ(absl::GetFlag(FLAGS_std_optional_int64), std::nullopt);
+}
+
+// --------------------------------------------------------------------
+
+#endif
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/flags/internal/flag.cc b/third_party/abseil-cpp/absl/flags/internal/flag.cc
index 1515022d11..cc656f9d13 100644
--- a/third_party/abseil-cpp/absl/flags/internal/flag.cc
+++ b/third_party/abseil-cpp/absl/flags/internal/flag.cc
@@ -30,6 +30,7 @@
 #include "absl/base/call_once.h"
 #include "absl/base/casts.h"
 #include "absl/base/config.h"
+#include "absl/base/dynamic_annotations.h"
 #include "absl/base/optimization.h"
 #include "absl/flags/config.h"
 #include "absl/flags/internal/commandlineflag.h"
@@ -160,6 +161,8 @@ void FlagImpl::Init() {
         std::memcpy(buf.data() + Sizeof(op_), &initialized,
                     sizeof(initialized));
       }
+      // Type can contain valid uninitialized bits, e.g. padding.
+      ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(buf.data(), buf.size());
       OneWordValue().store(absl::bit_cast<int64_t>(buf),
                            std::memory_order_release);
       break;
@@ -205,7 +208,7 @@ void FlagImpl::AssertValidType(FlagFastTypeId rhs_type_id,
 
   if (lhs_runtime_type_id == rhs_runtime_type_id) return;
 
-#if defined(ABSL_FLAGS_INTERNAL_HAS_RTTI)
+#ifdef ABSL_INTERNAL_HAS_RTTI
   if (*lhs_runtime_type_id == *rhs_runtime_type_id) return;
 #endif
 
@@ -403,7 +406,7 @@ template <typename StorageT>
 StorageT* FlagImpl::OffsetValue() const {
   char* p = reinterpret_cast<char*>(const_cast<FlagImpl*>(this));
   // The offset is deduced via Flag value type specific op_.
-  size_t offset = flags_internal::ValueOffset(op_);
+  ptrdiff_t offset = flags_internal::ValueOffset(op_);
 
   return reinterpret_cast<StorageT*>(p + offset);
 }
@@ -483,7 +486,7 @@ bool FlagImpl::ReadOneBool() const {
 }
 
 void FlagImpl::ReadSequenceLockedData(void* dst) const {
-  int size = Sizeof(op_);
+  size_t size = Sizeof(op_);
   // Attempt to read using the sequence lock.
   if (ABSL_PREDICT_TRUE(seq_lock_.TryRead(dst, AtomicBufferValue(), size))) {
     return;
diff --git a/third_party/abseil-cpp/absl/flags/internal/flag.h b/third_party/abseil-cpp/absl/flags/internal/flag.h
index 124a2f1c03..6154638c41 100644
--- a/third_party/abseil-cpp/absl/flags/internal/flag.h
+++ b/third_party/abseil-cpp/absl/flags/internal/flag.h
@@ -163,7 +163,7 @@ inline ptrdiff_t ValueOffset(FlagOpFn op) {
 // Returns an address of RTTI's typeid(T).
 template <typename T>
 inline const std::type_info* GenRuntimeTypeId() {
-#if defined(ABSL_FLAGS_INTERNAL_HAS_RTTI)
+#ifdef ABSL_INTERNAL_HAS_RTTI
   return &typeid(T);
 #else
   return nullptr;
@@ -303,7 +303,9 @@ constexpr FlagDefaultArg DefaultArg(char) {
 ///////////////////////////////////////////////////////////////////////////////
 // Flag current value auxiliary structs.
 
-constexpr int64_t UninitializedFlagValue() { return 0xababababababababll; }
+constexpr int64_t UninitializedFlagValue() {
+  return static_cast<int64_t>(0xababababababababll);
+}
 
 template <typename T>
 using FlagUseValueAndInitBitStorage = std::integral_constant<
@@ -755,8 +757,8 @@ void* FlagOps(FlagOp op, const void* v1, void* v2, void* v3) {
     case FlagOp::kValueOffset: {
       // Round sizeof(FlagImp) to a multiple of alignof(FlagValue<T>) to get the
       // offset of the data.
-      ptrdiff_t round_to = alignof(FlagValue<T>);
-      ptrdiff_t offset =
+      size_t round_to = alignof(FlagValue<T>);
+      size_t offset =
           (sizeof(FlagImpl) + round_to - 1) / round_to * round_to;
       return reinterpret_cast<void*>(offset);
     }
diff --git a/third_party/abseil-cpp/absl/flags/internal/usage.cc b/third_party/abseil-cpp/absl/flags/internal/usage.cc
index 949709e883..a3b13ed363 100644
--- a/third_party/abseil-cpp/absl/flags/internal/usage.cc
+++ b/third_party/abseil-cpp/absl/flags/internal/usage.cc
@@ -148,8 +148,7 @@ class FlagHelpPrettyPrinter {
       }
 
       // Write the token, ending the string first if necessary/possible.
-      if (!new_line &&
-          (line_len_ + static_cast<int>(token.size()) >= max_line_len_)) {
+      if (!new_line && (line_len_ + token.size() >= max_line_len_)) {
         EndLine();
         new_line = true;
       }
diff --git a/third_party/abseil-cpp/absl/flags/internal/usage_test.cc b/third_party/abseil-cpp/absl/flags/internal/usage_test.cc
index 044d71c87d..209a7be9b6 100644
--- a/third_party/abseil-cpp/absl/flags/internal/usage_test.cc
+++ b/third_party/abseil-cpp/absl/flags/internal/usage_test.cc
@@ -20,6 +20,7 @@
 #include <sstream>
 #include <string>
 
+#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/flags/flag.h"
 #include "absl/flags/internal/parse.h"
@@ -47,8 +48,10 @@ struct UDT {
   UDT(const UDT&) = default;
   UDT& operator=(const UDT&) = default;
 };
-bool AbslParseFlag(absl::string_view, UDT*, std::string*) { return true; }
-std::string AbslUnparseFlag(const UDT&) { return "UDT{}"; }
+static bool AbslParseFlag(absl::string_view, UDT*, std::string*) {
+  return true;
+}
+static std::string AbslUnparseFlag(const UDT&) { return "UDT{}"; }
 
 ABSL_FLAG(UDT, usage_reporting_test_flag_05, {},
           "usage_reporting_test_flag_05 help message");
@@ -103,14 +106,19 @@ class UsageReportingTest : public testing::Test {
 using UsageReportingDeathTest = UsageReportingTest;
 
 TEST_F(UsageReportingDeathTest, TestSetProgramUsageMessage) {
+#if !defined(GTEST_HAS_ABSL) || !GTEST_HAS_ABSL
+  // Check for kTestUsageMessage set in main() below.
   EXPECT_EQ(absl::ProgramUsageMessage(), kTestUsageMessage);
+#else
+  // Check for part of the usage message set by GoogleTest.
+  EXPECT_THAT(absl::ProgramUsageMessage(),
+              ::testing::HasSubstr(
+                  "This program contains tests written using Google Test"));
+#endif
 
-#ifndef _WIN32
-  // TODO(rogeeff): figure out why this does not work on Windows.
   EXPECT_DEATH_IF_SUPPORTED(
       absl::SetProgramUsageMessage("custom usage message"),
-      ".*SetProgramUsageMessage\\(\\) called twice.*");
-#endif
+      ::testing::HasSubstr("SetProgramUsageMessage() called twice"));
 }
 
 // --------------------------------------------------------------------
@@ -487,8 +495,10 @@ path.
 int main(int argc, char* argv[]) {
   (void)absl::GetFlag(FLAGS_undefok);  // Force linking of parse.cc
   flags::SetProgramInvocationName("usage_test");
+#if !defined(GTEST_HAS_ABSL) || !GTEST_HAS_ABSL
+  // GoogleTest calls absl::SetProgramUsageMessage() already.
   absl::SetProgramUsageMessage(kTestUsageMessage);
+#endif
   ::testing::InitGoogleTest(&argc, argv);
-
   return RUN_ALL_TESTS();
 }
diff --git a/third_party/abseil-cpp/absl/flags/marshalling.h b/third_party/abseil-cpp/absl/flags/marshalling.h
index 7cbc136d57..325e75e516 100644
--- a/third_party/abseil-cpp/absl/flags/marshalling.h
+++ b/third_party/abseil-cpp/absl/flags/marshalling.h
@@ -33,6 +33,7 @@
 // * `double`
 // * `std::string`
 // * `std::vector<std::string>`
+// * `std::optional<T>`
 // * `absl::LogSeverity` (provided natively for layering reasons)
 //
 // Note that support for integral types is implemented using overloads for
@@ -65,6 +66,42 @@
 // below.)
 //
 // -----------------------------------------------------------------------------
+// Optional Flags
+// -----------------------------------------------------------------------------
+//
+// The Abseil flags library supports flags of type `std::optional<T>` where
+// `T` is a type of one of the supported flags. We refer to this flag type as
+// an "optional flag." An optional flag is either "valueless", holding no value
+// of type `T` (indicating that the flag has not been set) or a value of type
+// `T`. The valueless state in C++ code is represented by a value of
+// `std::nullopt` for the optional flag.
+//
+// Using `std::nullopt` as an optional flag's default value allows you to check
+// whether such a flag was ever specified on the command line:
+//
+//   if (absl::GetFlag(FLAGS_foo).has_value()) {
+//     // flag was set on command line
+//   } else {
+//     // flag was not passed on command line
+//   }
+//
+// Using an optional flag in this manner avoids common workarounds for
+// indicating such an unset flag (such as using sentinel values to indicate this
+// state).
+//
+// An optional flag also allows a developer to pass a flag in an "unset"
+// valueless state on the command line, allowing the flag to later be set in
+// binary logic. An optional flag's valueless state is indicated by the special
+// notation of passing the value as an empty string through the syntax `--flag=`
+// or `--flag ""`.
+//
+//   $ binary_with_optional --flag_in_unset_state=
+//   $ binary_with_optional --flag_in_unset_state ""
+//
+// Note: as a result of the above syntax requirements, an optional flag cannot
+// be set to a `T` of any value which unparses to the empty string.
+//
+// -----------------------------------------------------------------------------
 // Adding Type Support for Abseil Flags
 // -----------------------------------------------------------------------------
 //
@@ -162,14 +199,27 @@
 #ifndef ABSL_FLAGS_MARSHALLING_H_
 #define ABSL_FLAGS_MARSHALLING_H_
 
+#include "absl/base/config.h"
+
+#if defined(ABSL_HAVE_STD_OPTIONAL) && !defined(ABSL_USES_STD_OPTIONAL)
+#include <optional>
+#endif
 #include <string>
 #include <vector>
 
-#include "absl/base/config.h"
 #include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
+
+// Forward declaration to be used inside composable flag parse/unparse
+// implementations
+template <typename T>
+inline bool ParseFlag(absl::string_view input, T* dst, std::string* error);
+template <typename T>
+inline std::string UnparseFlag(const T& v);
+
 namespace flags_internal {
 
 // Overloads of `AbslParseFlag()` and `AbslUnparseFlag()` for fundamental types.
@@ -189,6 +239,36 @@ bool AbslParseFlag(absl::string_view, std::string*, std::string*);
 bool AbslParseFlag(absl::string_view, std::vector<std::string>*, std::string*);
 
 template <typename T>
+bool AbslParseFlag(absl::string_view text, absl::optional<T>* f,
+                   std::string* err) {
+  if (text.empty()) {
+    *f = absl::nullopt;
+    return true;
+  }
+  T value;
+  if (!absl::ParseFlag(text, &value, err)) return false;
+
+  *f = std::move(value);
+  return true;
+}
+
+#if defined(ABSL_HAVE_STD_OPTIONAL) && !defined(ABSL_USES_STD_OPTIONAL)
+template <typename T>
+bool AbslParseFlag(absl::string_view text, std::optional<T>* f,
+                   std::string* err) {
+  if (text.empty()) {
+    *f = std::nullopt;
+    return true;
+  }
+  T value;
+  if (!absl::ParseFlag(text, &value, err)) return false;
+
+  *f = std::move(value);
+  return true;
+}
+#endif
+
+template <typename T>
 bool InvokeParseFlag(absl::string_view input, T* dst, std::string* err) {
   // Comment on next line provides a good compiler error message if T
   // does not have AbslParseFlag(absl::string_view, T*, std::string*).
@@ -202,6 +282,18 @@ std::string AbslUnparseFlag(absl::string_view v);
 std::string AbslUnparseFlag(const std::vector<std::string>&);
 
 template <typename T>
+std::string AbslUnparseFlag(const absl::optional<T>& f) {
+  return f.has_value() ? absl::UnparseFlag(*f) : "";
+}
+
+#if defined(ABSL_HAVE_STD_OPTIONAL) && !defined(ABSL_USES_STD_OPTIONAL)
+template <typename T>
+std::string AbslUnparseFlag(const std::optional<T>& f) {
+  return f.has_value() ? absl::UnparseFlag(*f) : "";
+}
+#endif
+
+template <typename T>
 std::string Unparse(const T& v) {
   // Comment on next line provides a good compiler error message if T does not
   // have UnparseFlag.
diff --git a/third_party/abseil-cpp/absl/flags/marshalling_test.cc b/third_party/abseil-cpp/absl/flags/marshalling_test.cc
index 4a64ce11a1..7b6d2ad5cf 100644
--- a/third_party/abseil-cpp/absl/flags/marshalling_test.cc
+++ b/third_party/abseil-cpp/absl/flags/marshalling_test.cc
@@ -659,6 +659,88 @@ TEST(MarshallingTest, TestVectorOfStringParsing) {
 
 // --------------------------------------------------------------------
 
+TEST(MarshallingTest, TestOptionalBoolParsing) {
+  std::string err;
+  absl::optional<bool> value;
+
+  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(value.has_value());
+
+  EXPECT_TRUE(absl::ParseFlag("true", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_TRUE(*value);
+
+  EXPECT_TRUE(absl::ParseFlag("false", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_FALSE(*value);
+
+  EXPECT_FALSE(absl::ParseFlag("nullopt", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestOptionalIntParsing) {
+  std::string err;
+  absl::optional<int> value;
+
+  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(value.has_value());
+
+  EXPECT_TRUE(absl::ParseFlag("10", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, 10);
+
+  EXPECT_TRUE(absl::ParseFlag("0x1F", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, 31);
+
+  EXPECT_FALSE(absl::ParseFlag("nullopt", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestOptionalDoubleParsing) {
+  std::string err;
+  absl::optional<double> value;
+
+  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(value.has_value());
+
+  EXPECT_TRUE(absl::ParseFlag("1.11", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, 1.11);
+
+  EXPECT_TRUE(absl::ParseFlag("-0.12", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, -0.12);
+
+  EXPECT_FALSE(absl::ParseFlag("nullopt", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestOptionalStringParsing) {
+  std::string err;
+  absl::optional<std::string> value;
+
+  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(value.has_value());
+
+  EXPECT_TRUE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, " ");
+
+  EXPECT_TRUE(absl::ParseFlag("aqswde", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, "aqswde");
+
+  EXPECT_TRUE(absl::ParseFlag("nullopt", &value, &err));
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(*value, "nullopt");
+}
+
+// --------------------------------------------------------------------
+
 TEST(MarshallingTest, TestBoolUnparsing) {
   EXPECT_EQ(absl::UnparseFlag(true), "true");
   EXPECT_EQ(absl::UnparseFlag(false), "false");
@@ -808,6 +890,90 @@ TEST(MarshallingTest, TestStringUnparsing) {
 
 // --------------------------------------------------------------------
 
+TEST(MarshallingTest, TestOptionalBoolUnparsing) {
+  absl::optional<bool> value;
+
+  EXPECT_EQ(absl::UnparseFlag(value), "");
+  value = true;
+  EXPECT_EQ(absl::UnparseFlag(value), "true");
+  value = false;
+  EXPECT_EQ(absl::UnparseFlag(value), "false");
+  value = absl::nullopt;
+  EXPECT_EQ(absl::UnparseFlag(value), "");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestOptionalIntUnparsing) {
+  absl::optional<int> value;
+
+  EXPECT_EQ(absl::UnparseFlag(value), "");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = -12;
+  EXPECT_EQ(absl::UnparseFlag(value), "-12");
+  value = absl::nullopt;
+  EXPECT_EQ(absl::UnparseFlag(value), "");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestOptionalDoubleUnparsing) {
+  absl::optional<double> value;
+
+  EXPECT_EQ(absl::UnparseFlag(value), "");
+  value = 1.;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = -1.23;
+  EXPECT_EQ(absl::UnparseFlag(value), "-1.23");
+  value = absl::nullopt;
+  EXPECT_EQ(absl::UnparseFlag(value), "");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestOptionalStringUnparsing) {
+  absl::optional<std::string> strvalue;
+  EXPECT_EQ(absl::UnparseFlag(strvalue), "");
+
+  strvalue = "asdfg";
+  EXPECT_EQ(absl::UnparseFlag(strvalue), "asdfg");
+
+  strvalue = " ";
+  EXPECT_EQ(absl::UnparseFlag(strvalue), " ");
+
+  strvalue = "";  // It is UB to set an optional string flag to ""
+  EXPECT_EQ(absl::UnparseFlag(strvalue), "");
+}
+
+// --------------------------------------------------------------------
+
+#if defined(ABSL_HAVE_STD_OPTIONAL) && !defined(ABSL_USES_STD_OPTIONAL)
+
+TEST(MarshallingTest, TestStdOptionalUnparsing) {
+  std::optional<std::string> strvalue;
+  EXPECT_EQ(absl::UnparseFlag(strvalue), "");
+
+  strvalue = "asdfg";
+  EXPECT_EQ(absl::UnparseFlag(strvalue), "asdfg");
+
+  strvalue = " ";
+  EXPECT_EQ(absl::UnparseFlag(strvalue), " ");
+
+  strvalue = "";  // It is UB to set an optional string flag to ""
+  EXPECT_EQ(absl::UnparseFlag(strvalue), "");
+
+  std::optional<int> intvalue;
+  EXPECT_EQ(absl::UnparseFlag(intvalue), "");
+
+  intvalue = 10;
+  EXPECT_EQ(absl::UnparseFlag(intvalue), "10");
+}
+
+// --------------------------------------------------------------------
+
+#endif
+
 template <typename T>
 void TestRoundtrip(T v) {
   T new_v;
diff --git a/third_party/abseil-cpp/absl/flags/parse.cc b/third_party/abseil-cpp/absl/flags/parse.cc
index dd1a6796ca..2851c0f788 100644
--- a/third_party/abseil-cpp/absl/flags/parse.cc
+++ b/third_party/abseil-cpp/absl/flags/parse.cc
@@ -159,14 +159,14 @@ class ArgsList {
   // Returns success status: true if parsing successful, false otherwise.
   bool ReadFromFlagfile(const std::string& flag_file_name);
 
-  int Size() const { return args_.size() - next_arg_; }
-  int FrontIndex() const { return next_arg_; }
+  size_t Size() const { return args_.size() - next_arg_; }
+  size_t FrontIndex() const { return next_arg_; }
   absl::string_view Front() const { return args_[next_arg_]; }
   void PopFront() { next_arg_++; }
 
  private:
   std::vector<std::string> args_;
-  int next_arg_;
+  size_t next_arg_;
 };
 
 bool ArgsList::ReadFromFlagfile(const std::string& flag_file_name) {
@@ -626,7 +626,7 @@ std::vector<char*> ParseCommandLineImpl(int argc, char* argv[],
 
   std::vector<char*> output_args;
   std::vector<char*> positional_args;
-  output_args.reserve(argc);
+  output_args.reserve(static_cast<size_t>(argc));
 
   // This is the list of undefined flags. The element of the list is the pair
   // consisting of boolean indicating if flag came from command line (vs from
@@ -795,8 +795,8 @@ std::vector<char*> ParseCommandLineImpl(int argc, char* argv[],
 
   // All the remaining arguments are positional.
   if (!input_args.empty()) {
-    for (int arg_index = input_args.back().FrontIndex(); arg_index < argc;
-         ++arg_index) {
+    for (size_t arg_index = input_args.back().FrontIndex();
+         arg_index < static_cast<size_t>(argc); ++arg_index) {
       output_args.push_back(argv[arg_index]);
     }
   }
diff --git a/third_party/abseil-cpp/absl/functional/BUILD.bazel b/third_party/abseil-cpp/absl/functional/BUILD.bazel
index f9f2b9c2f5..c4fbce9863 100644
--- a/third_party/abseil-cpp/absl/functional/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/functional/BUILD.bazel
@@ -26,6 +26,40 @@ package(default_visibility = ["//visibility:public"])
 licenses(["notice"])
 
 cc_library(
+    name = "any_invocable",
+    srcs = ["internal/any_invocable.h"],
+    hdrs = ["any_invocable.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/base:base_internal",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/meta:type_traits",
+        "//absl/utility",
+    ],
+)
+
+cc_test(
+    name = "any_invocable_test",
+    srcs = [
+        "any_invocable_test.cc",
+        "internal/any_invocable.h",
+    ],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":any_invocable",
+        "//absl/base:base_internal",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/meta:type_traits",
+        "//absl/utility",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_library(
     name = "bind_front",
     srcs = ["internal/front_binder.h"],
     hdrs = ["bind_front.h"],
@@ -78,14 +112,15 @@ cc_test(
 )
 
 cc_test(
-    name = "function_ref_benchmark",
+    name = "function_type_benchmark",
     srcs = [
-        "function_ref_benchmark.cc",
+        "function_type_benchmark.cc",
     ],
     copts = ABSL_TEST_COPTS,
     tags = ["benchmark"],
     visibility = ["//visibility:private"],
     deps = [
+        ":any_invocable",
         ":function_ref",
         "//absl/base:core_headers",
         "@com_github_google_benchmark//:benchmark_main",
diff --git a/third_party/abseil-cpp/absl/functional/BUILD.gn b/third_party/abseil-cpp/absl/functional/BUILD.gn
new file mode 100644
index 0000000000..7e629dc540
--- /dev/null
+++ b/third_party/abseil-cpp/absl/functional/BUILD.gn
@@ -0,0 +1,53 @@
+# Copyright 2020 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("any_invocable") {
+  sources = [ "internal/any_invocable.h" ]
+  public = [ "any_invocable.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_test("any_invocable_test") {
+  sources = [
+    "any_invocable_test.cc",
+    "internal/any_invocable.h",
+  ]
+  deps = [
+    ":any_invocable",
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("bind_front") {
+  sources = [ "internal/front_binder.h" ]
+  public = [ "bind_front.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/container:compressed_tuple",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("function_ref") {
+  sources = [ "internal/function_ref.h" ]
+  public = [ "function_ref.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/functional/CMakeLists.txt b/third_party/abseil-cpp/absl/functional/CMakeLists.txt
index 338ddc6c6c..c0f6eaaa2d 100644
--- a/third_party/abseil-cpp/absl/functional/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/functional/CMakeLists.txt
@@ -16,6 +16,42 @@
 
 absl_cc_library(
   NAME
+    any_invocable
+  SRCS
+    "internal/any_invocable.h"
+  HDRS
+    "any_invocable.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  DEPS
+    absl::base_internal
+    absl::config
+    absl::core_headers
+    absl::type_traits
+    absl::utility
+  PUBLIC
+)
+
+absl_cc_test(
+  NAME
+    any_invocable_test
+  SRCS
+    "any_invocable_test.cc"
+    "internal/any_invocable.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  DEPS
+    absl::any_invocable
+    absl::base_internal
+    absl::config
+    absl::core_headers
+    absl::type_traits
+    absl::utility
+    GTest::gmock_main
+)
+
+absl_cc_library(
+  NAME
     bind_front
   SRCS
     "internal/front_binder.h"
diff --git a/third_party/abseil-cpp/absl/functional/any_invocable.h b/third_party/abseil-cpp/absl/functional/any_invocable.h
new file mode 100644
index 0000000000..3e783c871d
--- /dev/null
+++ b/third_party/abseil-cpp/absl/functional/any_invocable.h
@@ -0,0 +1,316 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: any_invocable.h
+// -----------------------------------------------------------------------------
+//
+// This header file defines an `absl::AnyInvocable` type that assumes ownership
+// and wraps an object of an invocable type. (Invocable types adhere to the
+// concept specified in https://en.cppreference.com/w/cpp/concepts/invocable.)
+//
+// In general, prefer `absl::AnyInvocable` when you need a type-erased
+// function parameter that needs to take ownership of the type.
+//
+// NOTE: `absl::AnyInvocable` is similar to the C++23 `std::move_only_function`
+// abstraction, but has a slightly different API and is not designed to be a
+// drop-in replacement or C++11-compatible backfill of that type.
+//
+// Credits to Matt Calabrese (https://github.com/mattcalabrese) for the original
+// implementation.
+
+#ifndef ABSL_FUNCTIONAL_ANY_INVOCABLE_H_
+#define ABSL_FUNCTIONAL_ANY_INVOCABLE_H_
+
+#include <cstddef>
+#include <initializer_list>
+#include <type_traits>
+#include <utility>
+
+#include "absl/base/config.h"
+#include "absl/functional/internal/any_invocable.h"
+#include "absl/meta/type_traits.h"
+#include "absl/utility/utility.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// absl::AnyInvocable
+//
+// `absl::AnyInvocable` is a functional wrapper type, like `std::function`, that
+// assumes ownership of an invocable object. Unlike `std::function`, an
+// `absl::AnyInvocable` is more type-safe and provides the following additional
+// benefits:
+//
+// * Properly adheres to const correctness of the underlying type
+// * Is move-only so avoids concurrency problems with copied invocables and
+//   unnecessary copies in general.
+// * Supports reference qualifiers allowing it to perform unique actions (noted
+//   below).
+//
+// `absl::AnyInvocable` is a template, and an `absl::AnyInvocable` instantiation
+// may wrap any invocable object with a compatible function signature, e.g.
+// having arguments and return types convertible to types matching the
+// `absl::AnyInvocable` signature, and also matching any stated reference
+// qualifiers, as long as that type is moveable. It therefore provides broad
+// type erasure for functional objects.
+//
+// An `absl::AnyInvocable` is typically used as a type-erased function parameter
+// for accepting various functional objects:
+//
+// // Define a function taking an AnyInvocable parameter.
+// void my_func(absl::AnyInvocable<int()> f) {
+//   ...
+// };
+//
+// // That function can accept any invocable type:
+//
+// // Accept a function reference. We don't need to move a reference.
+// int func1() { return 0; };
+// my_func(func1);
+//
+// // Accept a lambda. We use std::move here because otherwise my_func would
+// // copy the lambda.
+// auto lambda = []() { return 0; };
+// my_func(std::move(lambda));
+//
+// // Accept a function pointer. We don't need to move a function pointer.
+// func2 = &func1;
+// my_func(func2);
+//
+// // Accept an std::function by moving it. Note that the lambda is copyable
+// // (satisfying std::function requirements) and moveable (satisfying
+// // absl::AnyInvocable requirements).
+// std::function<int()> func6 = []() { return 0; };
+// my_func(std::move(func6));
+//
+// `AnyInvocable` also properly respects `const` qualifiers, reference
+// qualifiers, and the `noexcept` specification (only in C++ 17 and beyond) as
+// part of the user-specified function type (e.g.
+// `AnyInvocable<void()&& const noexcept>`). These qualifiers will be applied to
+// the `AnyInvocable` object's `operator()`, and the underlying invocable must
+// be compatible with those qualifiers.
+//
+// Comparison of const and non-const function types:
+//
+//   // Store a closure inside of `func` with the function type `int()`.
+//   // Note that we have made `func` itself `const`.
+//   const AnyInvocable<int()> func = [](){ return 0; };
+//
+//   func();  // Compile-error: the passed type `int()` isn't `const`.
+//
+//   // Store a closure inside of `const_func` with the function type
+//   // `int() const`.
+//   // Note that we have also made `const_func` itself `const`.
+//   const AnyInvocable<int() const> const_func = [](){ return 0; };
+//
+//   const_func();  // Fine: `int() const` is `const`.
+//
+// In the above example, the call `func()` would have compiled if
+// `std::function` were used even though the types are not const compatible.
+// This is a bug, and using `absl::AnyInvocable` properly detects that bug.
+//
+// In addition to affecting the signature of `operator()`, the `const` and
+// reference qualifiers of the function type also appropriately constrain which
+// kinds of invocable objects you are allowed to place into the `AnyInvocable`
+// instance. If you specify a function type that is const-qualified, then
+// anything that you attempt to put into the `AnyInvocable` must be callable on
+// a `const` instance of that type.
+//
+// Constraint example:
+//
+//   // Fine because the lambda is callable when `const`.
+//   AnyInvocable<int() const> func = [=](){ return 0; };
+//
+//   // This is a compile-error because the lambda isn't callable when `const`.
+//   AnyInvocable<int() const> error = [=]() mutable { return 0; };
+//
+// An `&&` qualifier can be used to express that an `absl::AnyInvocable`
+// instance should be invoked at most once:
+//
+//   // Invokes `continuation` with the logical result of an operation when
+//   // that operation completes (common in asynchronous code).
+//   void CallOnCompletion(AnyInvocable<void(int)&&> continuation) {
+//     int result_of_foo = foo();
+//
+//     // `std::move` is required because the `operator()` of `continuation` is
+//     // rvalue-reference qualified.
+//     std::move(continuation)(result_of_foo);
+//   }
+//
+// Attempting to call `absl::AnyInvocable` multiple times in such a case
+// results in undefined behavior.
+template <class Sig>
+class AnyInvocable : private internal_any_invocable::Impl<Sig> {
+ private:
+  static_assert(
+      std::is_function<Sig>::value,
+      "The template argument of AnyInvocable must be a function type.");
+
+  using Impl = internal_any_invocable::Impl<Sig>;
+
+ public:
+  // The return type of Sig
+  using result_type = typename Impl::result_type;
+
+  // Constructors
+
+  // Constructs the `AnyInvocable` in an empty state.
+  AnyInvocable() noexcept = default;
+  AnyInvocable(std::nullptr_t) noexcept {}  // NOLINT
+
+  // Constructs the `AnyInvocable` from an existing `AnyInvocable` by a move.
+  // Note that `f` is not guaranteed to be empty after move-construction,
+  // although it may be.
+  AnyInvocable(AnyInvocable&& /*f*/) noexcept = default;
+
+  // Constructs an `AnyInvocable` from an invocable object.
+  //
+  // Upon construction, `*this` is only empty if `f` is a function pointer or
+  // member pointer type and is null, or if `f` is an `AnyInvocable` that is
+  // empty.
+  template <class F, typename = absl::enable_if_t<
+                         internal_any_invocable::CanConvert<Sig, F>::value>>
+  AnyInvocable(F&& f)  // NOLINT
+      : Impl(internal_any_invocable::ConversionConstruct(),
+             std::forward<F>(f)) {}
+
+  // Constructs an `AnyInvocable` that holds an invocable object of type `T`,
+  // which is constructed in-place from the given arguments.
+  //
+  // Example:
+  //
+  //   AnyInvocable<int(int)> func(
+  //       absl::in_place_type<PossiblyImmovableType>, arg1, arg2);
+  //
+  template <class T, class... Args,
+            typename = absl::enable_if_t<
+                internal_any_invocable::CanEmplace<Sig, T, Args...>::value>>
+  explicit AnyInvocable(absl::in_place_type_t<T>, Args&&... args)
+      : Impl(absl::in_place_type<absl::decay_t<T>>,
+             std::forward<Args>(args)...) {
+    static_assert(std::is_same<T, absl::decay_t<T>>::value,
+                  "The explicit template argument of in_place_type is required "
+                  "to be an unqualified object type.");
+  }
+
+  // Overload of the above constructor to support list-initialization.
+  template <class T, class U, class... Args,
+            typename = absl::enable_if_t<internal_any_invocable::CanEmplace<
+                Sig, T, std::initializer_list<U>&, Args...>::value>>
+  explicit AnyInvocable(absl::in_place_type_t<T>,
+                        std::initializer_list<U> ilist, Args&&... args)
+      : Impl(absl::in_place_type<absl::decay_t<T>>, ilist,
+             std::forward<Args>(args)...) {
+    static_assert(std::is_same<T, absl::decay_t<T>>::value,
+                  "The explicit template argument of in_place_type is required "
+                  "to be an unqualified object type.");
+  }
+
+  // Assignment Operators
+
+  // Assigns an `AnyInvocable` through move-assignment.
+  // Note that `f` is not guaranteed to be empty after move-assignment
+  // although it may be.
+  AnyInvocable& operator=(AnyInvocable&& /*f*/) noexcept = default;
+
+  // Assigns an `AnyInvocable` from a nullptr, clearing the `AnyInvocable`. If
+  // not empty, destroys the target, putting `*this` into an empty state.
+  AnyInvocable& operator=(std::nullptr_t) noexcept {
+    this->Clear();
+    return *this;
+  }
+
+  // Assigns an `AnyInvocable` from an existing `AnyInvocable` instance.
+  //
+  // Upon assignment, `*this` is only empty if `f` is a function pointer or
+  // member pointer type and is null, or if `f` is an `AnyInvocable` that is
+  // empty.
+  template <class F, typename = absl::enable_if_t<
+                         internal_any_invocable::CanAssign<Sig, F>::value>>
+  AnyInvocable& operator=(F&& f) {
+    *this = AnyInvocable(std::forward<F>(f));
+    return *this;
+  }
+
+  // Assigns an `AnyInvocable` from a reference to an invocable object.
+  // Upon assignment, stores a reference to the invocable object in the
+  // `AnyInvocable` instance.
+  template <
+      class F,
+      typename = absl::enable_if_t<
+          internal_any_invocable::CanAssignReferenceWrapper<Sig, F>::value>>
+  AnyInvocable& operator=(std::reference_wrapper<F> f) noexcept {
+    *this = AnyInvocable(f);
+    return *this;
+  }
+
+  // Destructor
+
+  // If not empty, destroys the target.
+  ~AnyInvocable() = default;
+
+  // absl::AnyInvocable::swap()
+  //
+  // Exchanges the targets of `*this` and `other`.
+  void swap(AnyInvocable& other) noexcept { std::swap(*this, other); }
+
+  // abl::AnyInvocable::operator bool()
+  //
+  // Returns `true` if `*this` is not empty.
+  explicit operator bool() const noexcept { return this->HasValue(); }
+
+  // Invokes the target object of `*this`. `*this` must not be empty.
+  //
+  // Note: The signature of this function call operator is the same as the
+  //       template parameter `Sig`.
+  using Impl::operator();
+
+  // Equality operators
+
+  // Returns `true` if `*this` is empty.
+  friend bool operator==(const AnyInvocable& f, std::nullptr_t) noexcept {
+    return !f.HasValue();
+  }
+
+  // Returns `true` if `*this` is empty.
+  friend bool operator==(std::nullptr_t, const AnyInvocable& f) noexcept {
+    return !f.HasValue();
+  }
+
+  // Returns `false` if `*this` is empty.
+  friend bool operator!=(const AnyInvocable& f, std::nullptr_t) noexcept {
+    return f.HasValue();
+  }
+
+  // Returns `false` if `*this` is empty.
+  friend bool operator!=(std::nullptr_t, const AnyInvocable& f) noexcept {
+    return f.HasValue();
+  }
+
+  // swap()
+  //
+  // Exchanges the targets of `f1` and `f2`.
+  friend void swap(AnyInvocable& f1, AnyInvocable& f2) noexcept { f1.swap(f2); }
+
+ private:
+  // Friending other instantiations is necessary for conversions.
+  template <bool /*SigIsNoexcept*/, class /*ReturnType*/, class... /*P*/>
+  friend class internal_any_invocable::CoreImpl;
+};
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_FUNCTIONAL_ANY_INVOCABLE_H_
diff --git a/third_party/abseil-cpp/absl/functional/any_invocable_test.cc b/third_party/abseil-cpp/absl/functional/any_invocable_test.cc
new file mode 100644
index 0000000000..1ed854077a
--- /dev/null
+++ b/third_party/abseil-cpp/absl/functional/any_invocable_test.cc
@@ -0,0 +1,1719 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/functional/any_invocable.h"
+
+#include <cstddef>
+#include <initializer_list>
+#include <memory>
+#include <numeric>
+#include <type_traits>
+
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/meta/type_traits.h"
+#include "absl/utility/utility.h"
+
+static_assert(absl::internal_any_invocable::kStorageSize >= sizeof(void*),
+              "These tests assume that the small object storage is at least "
+              "the size of a pointer.");
+
+namespace {
+
+// Helper macro used to avoid spelling `noexcept` in language versions older
+// than C++17, where it is not part of the type system, in order to avoid
+// compilation failures and internal compiler errors.
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+#define ABSL_INTERNAL_NOEXCEPT_SPEC(noex) noexcept(noex)
+#else
+#define ABSL_INTERNAL_NOEXCEPT_SPEC(noex)
+#endif
+
+// A dummy type we use when passing qualifiers to metafunctions
+struct _ {};
+
+template <class T>
+struct Wrapper {
+  template <class U,
+            class = absl::enable_if_t<std::is_convertible<U, T>::value>>
+  Wrapper(U&&);  // NOLINT
+};
+
+// This will cause a recursive trait instantiation if the SFINAE checks are
+// not ordered correctly for constructibility.
+static_assert(std::is_constructible<Wrapper<absl::AnyInvocable<void()>>,
+                                    Wrapper<absl::AnyInvocable<void()>>>::value,
+              "");
+
+// A metafunction that takes the cv and l-value reference qualifiers that were
+// associated with a function type (here passed via qualifiers of an object
+// type), and .
+template <class Qualifiers, class This>
+struct QualifiersForThisImpl {
+  static_assert(std::is_object<This>::value, "");
+  using type =
+      absl::conditional_t<std::is_const<Qualifiers>::value, const This, This>&;
+};
+
+template <class Qualifiers, class This>
+struct QualifiersForThisImpl<Qualifiers&, This>
+    : QualifiersForThisImpl<Qualifiers, This> {};
+
+template <class Qualifiers, class This>
+struct QualifiersForThisImpl<Qualifiers&&, This> {
+  static_assert(std::is_object<This>::value, "");
+  using type =
+      absl::conditional_t<std::is_const<Qualifiers>::value, const This, This>&&;
+};
+
+template <class Qualifiers, class This>
+using QualifiersForThis =
+    typename QualifiersForThisImpl<Qualifiers, This>::type;
+
+// A metafunction that takes the cv and l-value reference qualifier of T and
+// applies them to U's function type qualifiers.
+template <class T, class Fun>
+struct GiveQualifiersToFunImpl;
+
+template <class T, class R, class... P>
+struct GiveQualifiersToFunImpl<T, R(P...)> {
+  using type =
+      absl::conditional_t<std::is_const<T>::value, R(P...) const, R(P...)>;
+};
+
+template <class T, class R, class... P>
+struct GiveQualifiersToFunImpl<T&, R(P...)> {
+  using type =
+      absl::conditional_t<std::is_const<T>::value, R(P...) const&, R(P...)&>;
+};
+
+template <class T, class R, class... P>
+struct GiveQualifiersToFunImpl<T&&, R(P...)> {
+  using type =
+      absl::conditional_t<std::is_const<T>::value, R(P...) const&&, R(P...) &&>;
+};
+
+// If noexcept is a part of the type system, then provide the noexcept forms.
+#if defined(__cpp_noexcept_function_type)
+
+template <class T, class R, class... P>
+struct GiveQualifiersToFunImpl<T, R(P...) noexcept> {
+  using type = absl::conditional_t<std::is_const<T>::value,
+                                   R(P...) const noexcept, R(P...) noexcept>;
+};
+
+template <class T, class R, class... P>
+struct GiveQualifiersToFunImpl<T&, R(P...) noexcept> {
+  using type =
+      absl::conditional_t<std::is_const<T>::value, R(P...) const & noexcept,
+                          R(P...) & noexcept>;
+};
+
+template <class T, class R, class... P>
+struct GiveQualifiersToFunImpl<T&&, R(P...) noexcept> {
+  using type =
+      absl::conditional_t<std::is_const<T>::value, R(P...) const && noexcept,
+                          R(P...) && noexcept>;
+};
+
+#endif  // defined(__cpp_noexcept_function_type)
+
+template <class T, class Fun>
+using GiveQualifiersToFun = typename GiveQualifiersToFunImpl<T, Fun>::type;
+
+// This is used in template parameters to decide whether or not to use a type
+// that fits in the small object optimization storage.
+enum class ObjSize { small, large };
+
+// A base type that is used with classes as a means to insert an
+// appropriately-sized dummy datamember when Size is ObjSize::large so that the
+// user's class type is guaranteed to not fit in small object storage.
+template <ObjSize Size>
+struct TypeErasedPadding;
+
+template <>
+struct TypeErasedPadding<ObjSize::small> {};
+
+template <>
+struct TypeErasedPadding<ObjSize::large> {
+  char dummy_data[absl::internal_any_invocable::kStorageSize + 1] = {};
+};
+
+struct Int {
+  Int(int v) noexcept : value(v) {}  // NOLINT
+#ifndef _MSC_VER
+  Int(Int&&) noexcept {
+    // NOTE: Prior to C++17, this not being called requires optimizations to
+    //       take place when performing the top-level invocation. In practice,
+    //       most supported compilers perform this optimization prior to C++17.
+    std::abort();
+  }
+#else
+  Int(Int&& v) noexcept = default;
+#endif
+  operator int() && noexcept { return value; }  // NOLINT
+
+  int MemberFunctionAdd(int const& b, int c) noexcept {  // NOLINT
+    return value + b + c;
+  }
+
+  int value;
+};
+
+enum class Movable { no, yes, nothrow, trivial };
+
+enum class NothrowCall { no, yes };
+
+enum class Destructible { nothrow, trivial };
+
+enum class ObjAlign : std::size_t {
+  normal = absl::internal_any_invocable::kAlignment,
+  large = absl::internal_any_invocable::kAlignment * 2,
+};
+
+// A function-object template that has knobs for each property that can affect
+// how the object is stored in AnyInvocable.
+template <Movable Movability, Destructible Destructibility, class Qual,
+          NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>
+struct add;
+
+#define ABSL_INTERNALS_ADD(qual)                                              \
+  template <NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>  \
+  struct alignas(static_cast<std::size_t>(Alignment))                         \
+      add<Movable::trivial, Destructible::trivial, _ qual, CallExceptionSpec, \
+          Size, Alignment> : TypeErasedPadding<Size> {                        \
+    explicit add(int state_init) : state(state_init) {}                       \
+    explicit add(std::initializer_list<int> state_init, int tail)             \
+        : state(std::accumulate(std::begin(state_init), std::end(state_init), \
+                                0) +                                          \
+                tail) {}                                                      \
+    add(add&& other) = default; /*NOLINT*/                                    \
+    Int operator()(int a, int b, int c) qual                                  \
+        ABSL_INTERNAL_NOEXCEPT_SPEC(CallExceptionSpec == NothrowCall::yes) {  \
+      return state + a + b + c;                                               \
+    }                                                                         \
+    int state;                                                                \
+  };                                                                          \
+                                                                              \
+  template <NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>  \
+  struct alignas(static_cast<std::size_t>(Alignment))                         \
+      add<Movable::trivial, Destructible::nothrow, _ qual, CallExceptionSpec, \
+          Size, Alignment> : TypeErasedPadding<Size> {                        \
+    explicit add(int state_init) : state(state_init) {}                       \
+    explicit add(std::initializer_list<int> state_init, int tail)             \
+        : state(std::accumulate(std::begin(state_init), std::end(state_init), \
+                                0) +                                          \
+                tail) {}                                                      \
+    ~add() noexcept {}                                                        \
+    add(add&& other) = default; /*NOLINT*/                                    \
+    Int operator()(int a, int b, int c) qual                                  \
+        ABSL_INTERNAL_NOEXCEPT_SPEC(CallExceptionSpec == NothrowCall::yes) {  \
+      return state + a + b + c;                                               \
+    }                                                                         \
+    int state;                                                                \
+  }
+
+// Explicitly specify an empty argument.
+// MSVC (at least up to _MSC_VER 1931, if not beyond) warns that
+// ABSL_INTERNALS_ADD() is an undefined zero-arg overload.
+#define ABSL_INTERNALS_NOARG
+ABSL_INTERNALS_ADD(ABSL_INTERNALS_NOARG);
+#undef ABSL_INTERNALS_NOARG
+
+ABSL_INTERNALS_ADD(const);
+ABSL_INTERNALS_ADD(&);
+ABSL_INTERNALS_ADD(const&);
+ABSL_INTERNALS_ADD(&&);       // NOLINT
+ABSL_INTERNALS_ADD(const&&);  // NOLINT
+
+#undef ABSL_INTERNALS_ADD
+
+template <Destructible Destructibility, class Qual,
+          NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>
+struct add<Movable::no, Destructibility, Qual, CallExceptionSpec, Size,
+           Alignment> : private add<Movable::trivial, Destructibility, Qual,
+                                    CallExceptionSpec, Size, Alignment> {
+  using Base = add<Movable::trivial, Destructibility, Qual, CallExceptionSpec,
+                   Size, Alignment>;
+
+  explicit add(int state_init) : Base(state_init) {}
+
+  explicit add(std::initializer_list<int> state_init, int tail)
+      : Base(state_init, tail) {}
+
+  add(add&&) = delete;
+
+  using Base::operator();
+  using Base::state;
+};
+
+template <Destructible Destructibility, class Qual,
+          NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>
+struct add<Movable::yes, Destructibility, Qual, CallExceptionSpec, Size,
+           Alignment> : private add<Movable::trivial, Destructibility, Qual,
+                                    CallExceptionSpec, Size, Alignment> {
+  using Base = add<Movable::trivial, Destructibility, Qual, CallExceptionSpec,
+                   Size, Alignment>;
+
+  explicit add(int state_init) : Base(state_init) {}
+
+  explicit add(std::initializer_list<int> state_init, int tail)
+      : Base(state_init, tail) {}
+
+  add(add&& other) noexcept(false) : Base(other.state) {}  // NOLINT
+
+  using Base::operator();
+  using Base::state;
+};
+
+template <Destructible Destructibility, class Qual,
+          NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>
+struct add<Movable::nothrow, Destructibility, Qual, CallExceptionSpec, Size,
+           Alignment> : private add<Movable::trivial, Destructibility, Qual,
+                                    CallExceptionSpec, Size, Alignment> {
+  using Base = add<Movable::trivial, Destructibility, Qual, CallExceptionSpec,
+                   Size, Alignment>;
+
+  explicit add(int state_init) : Base(state_init) {}
+
+  explicit add(std::initializer_list<int> state_init, int tail)
+      : Base(state_init, tail) {}
+
+  add(add&& other) noexcept : Base(other.state) {}
+
+  using Base::operator();
+  using Base::state;
+};
+
+// Actual non-member functions rather than function objects
+Int add_function(Int&& a, int b, int c) noexcept { return a.value + b + c; }
+
+Int mult_function(Int&& a, int b, int c) noexcept { return a.value * b * c; }
+
+Int square_function(Int const&& a) noexcept { return a.value * a.value; }
+
+template <class Sig>
+using AnyInvocable = absl::AnyInvocable<Sig>;
+
+// Instantiations of this template contains all of the compile-time parameters
+// for a given instantiation of the AnyInvocable test suite.
+template <Movable Movability, Destructible Destructibility, class Qual,
+          NothrowCall CallExceptionSpec, ObjSize Size, ObjAlign Alignment>
+struct TestParams {
+  static constexpr Movable kMovability = Movability;
+  static constexpr Destructible kDestructibility = Destructibility;
+  using Qualifiers = Qual;
+  static constexpr NothrowCall kCallExceptionSpec = CallExceptionSpec;
+  static constexpr bool kIsNoexcept = kCallExceptionSpec == NothrowCall::yes;
+  static constexpr bool kIsRvalueQualified =
+      std::is_rvalue_reference<Qual>::value;
+  static constexpr ObjSize kSize = Size;
+  static constexpr ObjAlign kAlignment = Alignment;
+
+  // These types are used when testing with member object pointer Invocables
+  using UnqualifiedUnaryFunType = int(Int const&&)
+      ABSL_INTERNAL_NOEXCEPT_SPEC(CallExceptionSpec == NothrowCall::yes);
+  using UnaryFunType = GiveQualifiersToFun<Qualifiers, UnqualifiedUnaryFunType>;
+  using MemObjPtrType = int(Int::*);
+  using UnaryAnyInvType = AnyInvocable<UnaryFunType>;
+  using UnaryThisParamType = QualifiersForThis<Qualifiers, UnaryAnyInvType>;
+
+  template <class T>
+  static UnaryThisParamType ToUnaryThisParam(T&& fun) {
+    return static_cast<UnaryThisParamType>(fun);
+  }
+
+  // This function type intentionally uses 3 "kinds" of parameter types.
+  //     - A user-defined type
+  //     - A reference type
+  //     - A scalar type
+  //
+  // These were chosen because internal forwarding takes place on parameters
+  // differently depending based on type properties (scalars are forwarded by
+  // value).
+  using ResultType = Int;
+  using AnyInvocableFunTypeNotNoexcept = Int(Int, const int&, int);
+  using UnqualifiedFunType =
+      typename std::conditional<kIsNoexcept, Int(Int, const int&, int) noexcept,
+                                Int(Int, const int&, int)>::type;
+  using FunType = GiveQualifiersToFun<Qualifiers, UnqualifiedFunType>;
+  using MemFunPtrType =
+      typename std::conditional<kIsNoexcept,
+                                Int (Int::*)(const int&, int) noexcept,
+                                Int (Int::*)(const int&, int)>::type;
+  using AnyInvType = AnyInvocable<FunType>;
+  using AddType = add<kMovability, kDestructibility, Qualifiers,
+                      kCallExceptionSpec, kSize, kAlignment>;
+  using ThisParamType = QualifiersForThis<Qualifiers, AnyInvType>;
+
+  template <class T>
+  static ThisParamType ToThisParam(T&& fun) {
+    return static_cast<ThisParamType>(fun);
+  }
+
+  // These typedefs are used when testing void return type covariance.
+  using UnqualifiedVoidFunType =
+      typename std::conditional<kIsNoexcept,
+                                void(Int, const int&, int) noexcept,
+                                void(Int, const int&, int)>::type;
+  using VoidFunType = GiveQualifiersToFun<Qualifiers, UnqualifiedVoidFunType>;
+  using VoidAnyInvType = AnyInvocable<VoidFunType>;
+  using VoidThisParamType = QualifiersForThis<Qualifiers, VoidAnyInvType>;
+
+  template <class T>
+  static VoidThisParamType ToVoidThisParam(T&& fun) {
+    return static_cast<VoidThisParamType>(fun);
+  }
+
+  using CompatibleAnyInvocableFunType =
+      absl::conditional_t<std::is_rvalue_reference<Qual>::value,
+                          GiveQualifiersToFun<const _&&, UnqualifiedFunType>,
+                          GiveQualifiersToFun<const _&, UnqualifiedFunType>>;
+
+  using CompatibleAnyInvType = AnyInvocable<CompatibleAnyInvocableFunType>;
+
+  using IncompatibleInvocable =
+      absl::conditional_t<std::is_rvalue_reference<Qual>::value,
+                          GiveQualifiersToFun<_&, UnqualifiedFunType>(_::*),
+                          GiveQualifiersToFun<_&&, UnqualifiedFunType>(_::*)>;
+};
+
+// Given a member-pointer type, this metafunction yields the target type of the
+// pointer, not including the class-type. It is used to verify that the function
+// call operator of AnyInvocable has the proper signature, corresponding to the
+// function type that the user provided.
+template <class MemberPtrType>
+struct MemberTypeOfImpl;
+
+template <class Class, class T>
+struct MemberTypeOfImpl<T(Class::*)> {
+  using type = T;
+};
+
+template <class MemberPtrType>
+using MemberTypeOf = typename MemberTypeOfImpl<MemberPtrType>::type;
+
+template <class T, class = void>
+struct IsMemberSwappableImpl : std::false_type {
+  static constexpr bool kIsNothrow = false;
+};
+
+template <class T>
+struct IsMemberSwappableImpl<
+    T, absl::void_t<decltype(std::declval<T&>().swap(std::declval<T&>()))>>
+    : std::true_type {
+  static constexpr bool kIsNothrow =
+      noexcept(std::declval<T&>().swap(std::declval<T&>()));
+};
+
+template <class T>
+using IsMemberSwappable = IsMemberSwappableImpl<T>;
+
+template <class T>
+using IsNothrowMemberSwappable =
+    std::integral_constant<bool, IsMemberSwappableImpl<T>::kIsNothrow>;
+
+template <class T>
+class AnyInvTestBasic : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestBasic);
+
+TYPED_TEST_P(AnyInvTestBasic, DefaultConstruction) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+
+  EXPECT_TRUE(std::is_nothrow_default_constructible<AnyInvType>::value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionNullptr) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun = nullptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+
+  EXPECT_TRUE(
+      (std::is_nothrow_constructible<AnyInvType, std::nullptr_t>::value));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionNullFunctionPtr) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using UnqualifiedFunType = typename TypeParam::UnqualifiedFunType;
+
+  UnqualifiedFunType* const null_fun_ptr = nullptr;
+  AnyInvType fun = null_fun_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionNullMemberFunctionPtr) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using MemFunPtrType = typename TypeParam::MemFunPtrType;
+
+  const MemFunPtrType null_mem_fun_ptr = nullptr;
+  AnyInvType fun = null_mem_fun_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionNullMemberObjectPtr) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+  using MemObjPtrType = typename TypeParam::MemObjPtrType;
+
+  const MemObjPtrType null_mem_obj_ptr = nullptr;
+  UnaryAnyInvType fun = null_mem_obj_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionMemberFunctionPtr) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun = &Int::MemberFunctionAdd;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionMemberObjectPtr) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+
+  UnaryAnyInvType fun = &Int::value;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(13, TypeParam::ToUnaryThisParam(fun)(13));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionFunctionReferenceDecay) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun = add_function;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionCompatibleAnyInvocableEmpty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using CompatibleAnyInvType = typename TypeParam::CompatibleAnyInvType;
+
+  CompatibleAnyInvType other;
+  AnyInvType fun = std::move(other);
+
+  EXPECT_FALSE(static_cast<bool>(other));  // NOLINT
+  EXPECT_EQ(other, nullptr);               // NOLINT
+  EXPECT_EQ(nullptr, other);               // NOLINT
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConstructionCompatibleAnyInvocableNonempty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using CompatibleAnyInvType = typename TypeParam::CompatibleAnyInvType;
+
+  CompatibleAnyInvType other = &add_function;
+  AnyInvType fun = std::move(other);
+
+  EXPECT_FALSE(static_cast<bool>(other));  // NOLINT
+  EXPECT_EQ(other, nullptr);               // NOLINT
+  EXPECT_EQ(nullptr, other);               // NOLINT
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ConversionToBool) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  {
+    AnyInvType fun;
+
+    // This tests contextually-convertible-to-bool.
+    EXPECT_FALSE(fun ? true : false);  // NOLINT
+
+    // Make sure that the conversion is not implicit.
+    EXPECT_TRUE(
+        (std::is_nothrow_constructible<bool, const AnyInvType&>::value));
+    EXPECT_FALSE((std::is_convertible<const AnyInvType&, bool>::value));
+  }
+
+  {
+    AnyInvType fun = &add_function;
+
+    // This tests contextually-convertible-to-bool.
+    EXPECT_TRUE(fun ? true : false);  // NOLINT
+  }
+}
+
+TYPED_TEST_P(AnyInvTestBasic, Invocation) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  using FunType = typename TypeParam::FunType;
+  using AnyInvCallType = MemberTypeOf<decltype(&AnyInvType::operator())>;
+
+  // Make sure the function call operator of AnyInvocable always has the
+  // type that was specified via the template argument.
+  EXPECT_TRUE((std::is_same<AnyInvCallType, FunType>::value));
+
+  AnyInvType fun = &add_function;
+
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceConstruction) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun(absl::in_place_type<AddType>, 5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceConstructionInitializerList) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun(absl::in_place_type<AddType>, {1, 2, 3, 4}, 5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(39, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceNullFunPtrConstruction) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using UnqualifiedFunType = typename TypeParam::UnqualifiedFunType;
+
+  AnyInvType fun(absl::in_place_type<UnqualifiedFunType*>, nullptr);
+
+  // In-place construction does not lead to empty.
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceNullFunPtrConstructionValueInit) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using UnqualifiedFunType = typename TypeParam::UnqualifiedFunType;
+
+  AnyInvType fun(absl::in_place_type<UnqualifiedFunType*>);
+
+  // In-place construction does not lead to empty.
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceNullMemFunPtrConstruction) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using MemFunPtrType = typename TypeParam::MemFunPtrType;
+
+  AnyInvType fun(absl::in_place_type<MemFunPtrType>, nullptr);
+
+  // In-place construction does not lead to empty.
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceNullMemFunPtrConstructionValueInit) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using MemFunPtrType = typename TypeParam::MemFunPtrType;
+
+  AnyInvType fun(absl::in_place_type<MemFunPtrType>);
+
+  // In-place construction does not lead to empty.
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceNullMemObjPtrConstruction) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+  using MemObjPtrType = typename TypeParam::MemObjPtrType;
+
+  UnaryAnyInvType fun(absl::in_place_type<MemObjPtrType>, nullptr);
+
+  // In-place construction does not lead to empty.
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceNullMemObjPtrConstructionValueInit) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+  using MemObjPtrType = typename TypeParam::MemObjPtrType;
+
+  UnaryAnyInvType fun(absl::in_place_type<MemObjPtrType>);
+
+  // In-place construction does not lead to empty.
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, InPlaceVoidCovarianceConstruction) {
+  using VoidAnyInvType = typename TypeParam::VoidAnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  VoidAnyInvType fun(absl::in_place_type<AddType>, 5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestBasic, MoveConstructionFromEmpty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType source_fun;
+  AnyInvType fun(std::move(source_fun));
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+
+  EXPECT_TRUE(std::is_nothrow_move_constructible<AnyInvType>::value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, MoveConstructionFromNonEmpty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType source_fun(absl::in_place_type<AddType>, 5);
+  AnyInvType fun(std::move(source_fun));
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+
+  EXPECT_TRUE(std::is_nothrow_move_constructible<AnyInvType>::value);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ComparisonWithNullptrEmpty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun;
+
+  EXPECT_TRUE(fun == nullptr);
+  EXPECT_TRUE(nullptr == fun);
+
+  EXPECT_FALSE(fun != nullptr);
+  EXPECT_FALSE(nullptr != fun);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ComparisonWithNullptrNonempty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun(absl::in_place_type<AddType>, 5);
+
+  EXPECT_FALSE(fun == nullptr);
+  EXPECT_FALSE(nullptr == fun);
+
+  EXPECT_TRUE(fun != nullptr);
+  EXPECT_TRUE(nullptr != fun);
+}
+
+TYPED_TEST_P(AnyInvTestBasic, ResultType) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using ExpectedResultType = typename TypeParam::ResultType;
+
+  EXPECT_TRUE((std::is_same<typename AnyInvType::result_type,
+                            ExpectedResultType>::value));
+}
+
+template <class T>
+class AnyInvTestCombinatoric : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestCombinatoric);
+
+TYPED_TEST_P(AnyInvTestCombinatoric, MoveAssignEmptyEmptyLhsRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType source_fun;
+  AnyInvType fun;
+
+  fun = std::move(source_fun);
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, MoveAssignEmptyLhsNonemptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType source_fun(absl::in_place_type<AddType>, 5);
+  AnyInvType fun;
+
+  fun = std::move(source_fun);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, MoveAssignNonemptyEmptyLhsRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType source_fun;
+  AnyInvType fun(absl::in_place_type<AddType>, 5);
+
+  fun = std::move(source_fun);
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, MoveAssignNonemptyLhsNonemptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType source_fun(absl::in_place_type<AddType>, 5);
+  AnyInvType fun(absl::in_place_type<AddType>, 20);
+
+  fun = std::move(source_fun);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, SelfMoveAssignEmpty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType source_fun;
+  source_fun = std::move(source_fun);
+
+  // This space intentionally left blank.
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, SelfMoveAssignNonempty) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType source_fun(absl::in_place_type<AddType>, 5);
+  source_fun = std::move(source_fun);
+
+  // This space intentionally left blank.
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullptrEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun;
+  fun = nullptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullFunctionPtrEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using UnqualifiedFunType = typename TypeParam::UnqualifiedFunType;
+
+  UnqualifiedFunType* const null_fun_ptr = nullptr;
+  AnyInvType fun;
+  fun = null_fun_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullMemberFunctionPtrEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using MemFunPtrType = typename TypeParam::MemFunPtrType;
+
+  const MemFunPtrType null_mem_fun_ptr = nullptr;
+  AnyInvType fun;
+  fun = null_mem_fun_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullMemberObjectPtrEmptyLhs) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+  using MemObjPtrType = typename TypeParam::MemObjPtrType;
+
+  const MemObjPtrType null_mem_obj_ptr = nullptr;
+  UnaryAnyInvType fun;
+  fun = null_mem_obj_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignMemberFunctionPtrEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun;
+  fun = &Int::MemberFunctionAdd;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignMemberObjectPtrEmptyLhs) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+
+  UnaryAnyInvType fun;
+  fun = &Int::value;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(13, TypeParam::ToUnaryThisParam(fun)(13));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignFunctionReferenceDecayEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun;
+  fun = add_function;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric,
+             AssignCompatibleAnyInvocableEmptyLhsEmptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using CompatibleAnyInvType = typename TypeParam::CompatibleAnyInvType;
+
+  CompatibleAnyInvType other;
+  AnyInvType fun;
+  fun = std::move(other);
+
+  EXPECT_FALSE(static_cast<bool>(other));  // NOLINT
+  EXPECT_EQ(other, nullptr);               // NOLINT
+  EXPECT_EQ(nullptr, other);               // NOLINT
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric,
+             AssignCompatibleAnyInvocableEmptyLhsNonemptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using CompatibleAnyInvType = typename TypeParam::CompatibleAnyInvType;
+
+  CompatibleAnyInvType other = &add_function;
+  AnyInvType fun;
+  fun = std::move(other);
+
+  EXPECT_FALSE(static_cast<bool>(other));  // NOLINT
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullptrNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun = &mult_function;
+  fun = nullptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullFunctionPtrNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using UnqualifiedFunType = typename TypeParam::UnqualifiedFunType;
+
+  UnqualifiedFunType* const null_fun_ptr = nullptr;
+  AnyInvType fun = &mult_function;
+  fun = null_fun_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullMemberFunctionPtrNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using MemFunPtrType = typename TypeParam::MemFunPtrType;
+
+  const MemFunPtrType null_mem_fun_ptr = nullptr;
+  AnyInvType fun = &mult_function;
+  fun = null_mem_fun_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignNullMemberObjectPtrNonemptyLhs) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+  using MemObjPtrType = typename TypeParam::MemObjPtrType;
+
+  const MemObjPtrType null_mem_obj_ptr = nullptr;
+  UnaryAnyInvType fun = &square_function;
+  fun = null_mem_obj_ptr;
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignMemberFunctionPtrNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun = &mult_function;
+  fun = &Int::MemberFunctionAdd;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignMemberObjectPtrNonemptyLhs) {
+  using UnaryAnyInvType = typename TypeParam::UnaryAnyInvType;
+
+  UnaryAnyInvType fun = &square_function;
+  fun = &Int::value;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(13, TypeParam::ToUnaryThisParam(fun)(13));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, AssignFunctionReferenceDecayNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  AnyInvType fun = &mult_function;
+  fun = add_function;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric,
+             AssignCompatibleAnyInvocableNonemptyLhsEmptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using CompatibleAnyInvType = typename TypeParam::CompatibleAnyInvType;
+
+  CompatibleAnyInvType other;
+  AnyInvType fun = &mult_function;
+  fun = std::move(other);
+
+  EXPECT_FALSE(static_cast<bool>(other));  // NOLINT
+  EXPECT_EQ(other, nullptr);               // NOLINT
+  EXPECT_EQ(nullptr, other);               // NOLINT
+
+  EXPECT_FALSE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric,
+             AssignCompatibleAnyInvocableNonemptyLhsNonemptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using CompatibleAnyInvType = typename TypeParam::CompatibleAnyInvType;
+
+  CompatibleAnyInvType other = &add_function;
+  AnyInvType fun = &mult_function;
+  fun = std::move(other);
+
+  EXPECT_FALSE(static_cast<bool>(other));  // NOLINT
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(24, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, SwapEmptyLhsEmptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  // Swap idiom
+  {
+    AnyInvType fun;
+    AnyInvType other;
+
+    using std::swap;
+    swap(fun, other);
+
+    EXPECT_FALSE(static_cast<bool>(fun));
+    EXPECT_FALSE(static_cast<bool>(other));
+
+    EXPECT_TRUE(
+        absl::type_traits_internal::IsNothrowSwappable<AnyInvType>::value);
+  }
+
+  // Member swap
+  {
+    AnyInvType fun;
+    AnyInvType other;
+
+    fun.swap(other);
+
+    EXPECT_FALSE(static_cast<bool>(fun));
+    EXPECT_FALSE(static_cast<bool>(other));
+
+    EXPECT_TRUE(IsNothrowMemberSwappable<AnyInvType>::value);
+  }
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, SwapEmptyLhsNonemptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  // Swap idiom
+  {
+    AnyInvType fun;
+    AnyInvType other(absl::in_place_type<AddType>, 5);
+
+    using std::swap;
+    swap(fun, other);
+
+    EXPECT_TRUE(static_cast<bool>(fun));
+    EXPECT_FALSE(static_cast<bool>(other));
+
+    EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+
+    EXPECT_TRUE(
+        absl::type_traits_internal::IsNothrowSwappable<AnyInvType>::value);
+  }
+
+  // Member swap
+  {
+    AnyInvType fun;
+    AnyInvType other(absl::in_place_type<AddType>, 5);
+
+    fun.swap(other);
+
+    EXPECT_TRUE(static_cast<bool>(fun));
+    EXPECT_FALSE(static_cast<bool>(other));
+
+    EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+
+    EXPECT_TRUE(IsNothrowMemberSwappable<AnyInvType>::value);
+  }
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, SwapNonemptyLhsEmptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  // Swap idiom
+  {
+    AnyInvType fun(absl::in_place_type<AddType>, 5);
+    AnyInvType other;
+
+    using std::swap;
+    swap(fun, other);
+
+    EXPECT_FALSE(static_cast<bool>(fun));
+    EXPECT_TRUE(static_cast<bool>(other));
+
+    EXPECT_EQ(29, TypeParam::ToThisParam(other)(7, 8, 9).value);
+
+    EXPECT_TRUE(
+        absl::type_traits_internal::IsNothrowSwappable<AnyInvType>::value);
+  }
+
+  // Member swap
+  {
+    AnyInvType fun(absl::in_place_type<AddType>, 5);
+    AnyInvType other;
+
+    fun.swap(other);
+
+    EXPECT_FALSE(static_cast<bool>(fun));
+    EXPECT_TRUE(static_cast<bool>(other));
+
+    EXPECT_EQ(29, TypeParam::ToThisParam(other)(7, 8, 9).value);
+
+    EXPECT_TRUE(IsNothrowMemberSwappable<AnyInvType>::value);
+  }
+}
+
+TYPED_TEST_P(AnyInvTestCombinatoric, SwapNonemptyLhsNonemptyRhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  // Swap idiom
+  {
+    AnyInvType fun(absl::in_place_type<AddType>, 5);
+    AnyInvType other(absl::in_place_type<AddType>, 6);
+
+    using std::swap;
+    swap(fun, other);
+
+    EXPECT_TRUE(static_cast<bool>(fun));
+    EXPECT_TRUE(static_cast<bool>(other));
+
+    EXPECT_EQ(30, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+    EXPECT_EQ(29, TypeParam::ToThisParam(other)(7, 8, 9).value);
+
+    EXPECT_TRUE(
+        absl::type_traits_internal::IsNothrowSwappable<AnyInvType>::value);
+  }
+
+  // Member swap
+  {
+    AnyInvType fun(absl::in_place_type<AddType>, 5);
+    AnyInvType other(absl::in_place_type<AddType>, 6);
+
+    fun.swap(other);
+
+    EXPECT_TRUE(static_cast<bool>(fun));
+    EXPECT_TRUE(static_cast<bool>(other));
+
+    EXPECT_EQ(30, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+    EXPECT_EQ(29, TypeParam::ToThisParam(other)(7, 8, 9).value);
+
+    EXPECT_TRUE(IsNothrowMemberSwappable<AnyInvType>::value);
+  }
+}
+
+template <class T>
+class AnyInvTestMovable : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestMovable);
+
+TYPED_TEST_P(AnyInvTestMovable, ConversionConstructionUserDefinedType) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun(AddType(5));
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestMovable, ConversionConstructionVoidCovariance) {
+  using VoidAnyInvType = typename TypeParam::VoidAnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  VoidAnyInvType fun(AddType(5));
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+TYPED_TEST_P(AnyInvTestMovable, ConversionAssignUserDefinedTypeEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun;
+  fun = AddType(5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestMovable, ConversionAssignUserDefinedTypeNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun = &add_function;
+  fun = AddType(5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+}
+
+TYPED_TEST_P(AnyInvTestMovable, ConversionAssignVoidCovariance) {
+  using VoidAnyInvType = typename TypeParam::VoidAnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  VoidAnyInvType fun;
+  fun = AddType(5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+}
+
+template <class T>
+class AnyInvTestNoexceptFalse : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestNoexceptFalse);
+
+TYPED_TEST_P(AnyInvTestNoexceptFalse, ConversionConstructionConstraints) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  EXPECT_TRUE((std::is_constructible<
+               AnyInvType,
+               typename TypeParam::AnyInvocableFunTypeNotNoexcept*>::value));
+  EXPECT_FALSE((
+      std::is_constructible<AnyInvType,
+                            typename TypeParam::IncompatibleInvocable>::value));
+}
+
+TYPED_TEST_P(AnyInvTestNoexceptFalse, ConversionAssignConstraints) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  EXPECT_TRUE((std::is_assignable<
+               AnyInvType&,
+               typename TypeParam::AnyInvocableFunTypeNotNoexcept*>::value));
+  EXPECT_FALSE(
+      (std::is_assignable<AnyInvType&,
+                          typename TypeParam::IncompatibleInvocable>::value));
+}
+
+template <class T>
+class AnyInvTestNoexceptTrue : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestNoexceptTrue);
+
+TYPED_TEST_P(AnyInvTestNoexceptTrue, ConversionConstructionConstraints) {
+#if ABSL_INTERNAL_CPLUSPLUS_LANG < 201703L
+  GTEST_SKIP() << "Noexcept was not part of the type system before C++17.";
+#else
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  EXPECT_FALSE((std::is_constructible<
+                AnyInvType,
+                typename TypeParam::AnyInvocableFunTypeNotNoexcept*>::value));
+  EXPECT_FALSE((
+      std::is_constructible<AnyInvType,
+                            typename TypeParam::IncompatibleInvocable>::value));
+#endif
+}
+
+TYPED_TEST_P(AnyInvTestNoexceptTrue, ConversionAssignConstraints) {
+#if ABSL_INTERNAL_CPLUSPLUS_LANG < 201703L
+  GTEST_SKIP() << "Noexcept was not part of the type system before C++17.";
+#else
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  EXPECT_FALSE((std::is_assignable<
+                AnyInvType&,
+                typename TypeParam::AnyInvocableFunTypeNotNoexcept*>::value));
+  EXPECT_FALSE(
+      (std::is_assignable<AnyInvType&,
+                          typename TypeParam::IncompatibleInvocable>::value));
+#endif
+}
+
+template <class T>
+class AnyInvTestNonRvalue : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestNonRvalue);
+
+TYPED_TEST_P(AnyInvTestNonRvalue, ConversionConstructionReferenceWrapper) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AddType add(4);
+  AnyInvType fun = std::ref(add);
+  add.state = 5;
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(38, TypeParam::ToThisParam(fun)(10, 11, 12).value);
+}
+
+TYPED_TEST_P(AnyInvTestNonRvalue, NonMoveableResultType) {
+#if ABSL_INTERNAL_CPLUSPLUS_LANG < 201703L
+  GTEST_SKIP() << "Copy/move elision was not standard before C++17";
+#else
+  // Define a result type that cannot be copy- or move-constructed.
+  struct Result {
+    int x;
+
+    explicit Result(const int x_in) : x(x_in) {}
+    Result(Result&&) = delete;
+  };
+
+  static_assert(!std::is_move_constructible<Result>::value, "");
+  static_assert(!std::is_copy_constructible<Result>::value, "");
+
+  // Assumption check: it should nevertheless be possible to use functors that
+  // return a Result struct according to the language rules.
+  const auto return_17 = []() noexcept { return Result(17); };
+  EXPECT_EQ(17, return_17().x);
+
+  // Just like plain functors, it should work fine to use an AnyInvocable that
+  // returns the non-moveable type.
+  using UnqualifiedFun =
+      absl::conditional_t<TypeParam::kIsNoexcept, Result() noexcept, Result()>;
+
+  using Fun =
+      GiveQualifiersToFun<typename TypeParam::Qualifiers, UnqualifiedFun>;
+
+  AnyInvocable<Fun> any_inv(return_17);
+  EXPECT_EQ(17, any_inv().x);
+#endif
+}
+
+TYPED_TEST_P(AnyInvTestNonRvalue, ConversionAssignReferenceWrapperEmptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AddType add(4);
+  AnyInvType fun;
+  fun = std::ref(add);
+  add.state = 5;
+  EXPECT_TRUE(
+      (std::is_nothrow_assignable<AnyInvType&,
+                                  std::reference_wrapper<AddType>>::value));
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(38, TypeParam::ToThisParam(fun)(10, 11, 12).value);
+}
+
+TYPED_TEST_P(AnyInvTestNonRvalue, ConversionAssignReferenceWrapperNonemptyLhs) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AddType add(4);
+  AnyInvType fun = &mult_function;
+  fun = std::ref(add);
+  add.state = 5;
+  EXPECT_TRUE(
+      (std::is_nothrow_assignable<AnyInvType&,
+                                  std::reference_wrapper<AddType>>::value));
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(29, TypeParam::ToThisParam(fun)(7, 8, 9).value);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  EXPECT_EQ(38, TypeParam::ToThisParam(fun)(10, 11, 12).value);
+}
+
+template <class T>
+class AnyInvTestRvalue : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(AnyInvTestRvalue);
+
+TYPED_TEST_P(AnyInvTestRvalue, ConversionConstructionReferenceWrapper) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  EXPECT_FALSE((
+      std::is_convertible<std::reference_wrapper<AddType>, AnyInvType>::value));
+}
+
+TYPED_TEST_P(AnyInvTestRvalue, NonMoveableResultType) {
+#if ABSL_INTERNAL_CPLUSPLUS_LANG < 201703L
+  GTEST_SKIP() << "Copy/move elision was not standard before C++17";
+#else
+  // Define a result type that cannot be copy- or move-constructed.
+  struct Result {
+    int x;
+
+    explicit Result(const int x_in) : x(x_in) {}
+    Result(Result&&) = delete;
+  };
+
+  static_assert(!std::is_move_constructible<Result>::value, "");
+  static_assert(!std::is_copy_constructible<Result>::value, "");
+
+  // Assumption check: it should nevertheless be possible to use functors that
+  // return a Result struct according to the language rules.
+  const auto return_17 = []() noexcept { return Result(17); };
+  EXPECT_EQ(17, return_17().x);
+
+  // Just like plain functors, it should work fine to use an AnyInvocable that
+  // returns the non-moveable type.
+  using UnqualifiedFun =
+      absl::conditional_t<TypeParam::kIsNoexcept, Result() noexcept, Result()>;
+
+  using Fun =
+      GiveQualifiersToFun<typename TypeParam::Qualifiers, UnqualifiedFun>;
+
+  EXPECT_EQ(17, AnyInvocable<Fun>(return_17)().x);
+#endif
+}
+
+TYPED_TEST_P(AnyInvTestRvalue, ConversionAssignReferenceWrapper) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  EXPECT_FALSE((
+      std::is_assignable<AnyInvType&, std::reference_wrapper<AddType>>::value));
+}
+
+TYPED_TEST_P(AnyInvTestRvalue, NonConstCrashesOnSecondCall) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+  using AddType = typename TypeParam::AddType;
+
+  AnyInvType fun(absl::in_place_type<AddType>, 5);
+
+  EXPECT_TRUE(static_cast<bool>(fun));
+  std::move(fun)(7, 8, 9);
+
+  // Ensure we're still valid
+  EXPECT_TRUE(static_cast<bool>(fun));  // NOLINT(bugprone-use-after-move)
+
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED == 1
+  EXPECT_DEATH_IF_SUPPORTED(std::move(fun)(7, 8, 9), "");
+#endif
+}
+
+// Ensure that any qualifiers (in particular &&-qualifiers) do not affect
+// when the destructor is actually run.
+TYPED_TEST_P(AnyInvTestRvalue, QualifierIndependentObjectLifetime) {
+  using AnyInvType = typename TypeParam::AnyInvType;
+
+  auto refs = std::make_shared<std::nullptr_t>();
+  {
+    AnyInvType fun([refs](auto&&...) noexcept { return 0; });
+    EXPECT_FALSE(refs.unique());
+
+    std::move(fun)(7, 8, 9);
+
+    // Ensure destructor hasn't run even if rref-qualified
+    EXPECT_FALSE(refs.unique());
+  }
+  EXPECT_TRUE(refs.unique());
+}
+
+// NOTE: This test suite originally attempted to enumerate all possible
+// combinations of type properties but the build-time started getting too large.
+// Instead, it is now assumed that certain parameters are orthogonal and so
+// some combinations are elided.
+
+// A metafunction to form a TypeList of all cv and non-rvalue ref combinations,
+// coupled with all of the other explicitly specified parameters.
+template <Movable Mov, Destructible Dest, NothrowCall CallExceptionSpec,
+          ObjSize Size, ObjAlign Align>
+using NonRvalueQualifiedTestParams = ::testing::Types<               //
+    TestParams<Mov, Dest, _, CallExceptionSpec, Size, Align>,        //
+    TestParams<Mov, Dest, const _, CallExceptionSpec, Size, Align>,  //
+    TestParams<Mov, Dest, _&, CallExceptionSpec, Size, Align>,       //
+    TestParams<Mov, Dest, const _&, CallExceptionSpec, Size, Align>>;
+
+// A metafunction to form a TypeList of const and non-const rvalue ref
+// qualifiers, coupled with all of the other explicitly specified parameters.
+template <Movable Mov, Destructible Dest, NothrowCall CallExceptionSpec,
+          ObjSize Size, ObjAlign Align>
+using RvalueQualifiedTestParams = ::testing::Types<
+    TestParams<Mov, Dest, _&&, CallExceptionSpec, Size, Align>,       //
+    TestParams<Mov, Dest, const _&&, CallExceptionSpec, Size, Align>  //
+    >;
+
+// All qualifier combinations and a noexcept function type
+using TestParameterListNonRvalueQualifiersNothrowCall =
+    NonRvalueQualifiedTestParams<Movable::trivial, Destructible::trivial,
+                                 NothrowCall::yes, ObjSize::small,
+                                 ObjAlign::normal>;
+using TestParameterListRvalueQualifiersNothrowCall =
+    RvalueQualifiedTestParams<Movable::trivial, Destructible::trivial,
+                              NothrowCall::yes, ObjSize::small,
+                              ObjAlign::normal>;
+
+// All qualifier combinations and a non-noexcept function type
+using TestParameterListNonRvalueQualifiersCallMayThrow =
+    NonRvalueQualifiedTestParams<Movable::trivial, Destructible::trivial,
+                                 NothrowCall::no, ObjSize::small,
+                                 ObjAlign::normal>;
+using TestParameterListRvalueQualifiersCallMayThrow =
+    RvalueQualifiedTestParams<Movable::trivial, Destructible::trivial,
+                              NothrowCall::no, ObjSize::small,
+                              ObjAlign::normal>;
+
+// Lists of various cases that should lead to remote storage
+using TestParameterListRemoteMovable = ::testing::Types<
+    // "Normal" aligned types that are large and have trivial destructors
+    TestParams<Movable::trivial, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>,  //
+    TestParams<Movable::nothrow, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>,  //
+    TestParams<Movable::yes, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+    TestParams<Movable::yes, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>,  //
+
+    // Same as above but with non-trivial destructors
+    TestParams<Movable::trivial, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>,  //
+    TestParams<Movable::nothrow, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>,  //
+    TestParams<Movable::yes, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+    TestParams<Movable::yes, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>  //
+
+// Dynamic memory allocation for over-aligned data was introduced in C++17.
+// See https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0035r4.html
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+    // Types that must use remote storage because of a large alignment.
+    ,
+    TestParams<Movable::trivial, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::large>,  //
+    TestParams<Movable::nothrow, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::large>,  //
+    TestParams<Movable::trivial, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::large>,  //
+    TestParams<Movable::nothrow, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::large>  //
+#endif
+    >;
+using TestParameterListRemoteNonMovable = ::testing::Types<
+    // "Normal" aligned types that are large and have trivial destructors
+    TestParams<Movable::no, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+    TestParams<Movable::no, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>,  //
+    // Same as above but with non-trivial destructors
+    TestParams<Movable::no, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+    TestParams<Movable::no, Destructible::nothrow, _, NothrowCall::no,
+               ObjSize::large, ObjAlign::normal>  //
+    >;
+
+// Parameters that lead to local storage
+using TestParameterListLocal = ::testing::Types<
+    // Types that meet the requirements and have trivial destructors
+    TestParams<Movable::trivial, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+    TestParams<Movable::nothrow, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+
+    // Same as above but with non-trivial destructors
+    TestParams<Movable::trivial, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>,  //
+    TestParams<Movable::nothrow, Destructible::trivial, _, NothrowCall::no,
+               ObjSize::small, ObjAlign::normal>  //
+    >;
+
+// All of the tests that are run for every possible combination of types.
+REGISTER_TYPED_TEST_SUITE_P(
+    AnyInvTestBasic, DefaultConstruction, ConstructionNullptr,
+    ConstructionNullFunctionPtr, ConstructionNullMemberFunctionPtr,
+    ConstructionNullMemberObjectPtr, ConstructionMemberFunctionPtr,
+    ConstructionMemberObjectPtr, ConstructionFunctionReferenceDecay,
+    ConstructionCompatibleAnyInvocableEmpty,
+    ConstructionCompatibleAnyInvocableNonempty, InPlaceConstruction,
+    ConversionToBool, Invocation, InPlaceConstructionInitializerList,
+    InPlaceNullFunPtrConstruction, InPlaceNullFunPtrConstructionValueInit,
+    InPlaceNullMemFunPtrConstruction, InPlaceNullMemFunPtrConstructionValueInit,
+    InPlaceNullMemObjPtrConstruction, InPlaceNullMemObjPtrConstructionValueInit,
+    InPlaceVoidCovarianceConstruction, MoveConstructionFromEmpty,
+    MoveConstructionFromNonEmpty, ComparisonWithNullptrEmpty,
+    ComparisonWithNullptrNonempty, ResultType);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(
+    NonRvalueCallMayThrow, AnyInvTestBasic,
+    TestParameterListNonRvalueQualifiersCallMayThrow);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallMayThrow, AnyInvTestBasic,
+                               TestParameterListRvalueQualifiersCallMayThrow);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteMovable, AnyInvTestBasic,
+                               TestParameterListRemoteMovable);
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteNonMovable, AnyInvTestBasic,
+                               TestParameterListRemoteNonMovable);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(Local, AnyInvTestBasic, TestParameterListLocal);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(NonRvalueCallNothrow, AnyInvTestBasic,
+                               TestParameterListNonRvalueQualifiersNothrowCall);
+INSTANTIATE_TYPED_TEST_SUITE_P(CallNothrowRvalue, AnyInvTestBasic,
+                               TestParameterListRvalueQualifiersNothrowCall);
+
+// Tests for functions that take two operands.
+REGISTER_TYPED_TEST_SUITE_P(
+    AnyInvTestCombinatoric, MoveAssignEmptyEmptyLhsRhs,
+    MoveAssignEmptyLhsNonemptyRhs, MoveAssignNonemptyEmptyLhsRhs,
+    MoveAssignNonemptyLhsNonemptyRhs, SelfMoveAssignEmpty,
+    SelfMoveAssignNonempty, AssignNullptrEmptyLhs,
+    AssignNullFunctionPtrEmptyLhs, AssignNullMemberFunctionPtrEmptyLhs,
+    AssignNullMemberObjectPtrEmptyLhs, AssignMemberFunctionPtrEmptyLhs,
+    AssignMemberObjectPtrEmptyLhs, AssignFunctionReferenceDecayEmptyLhs,
+    AssignCompatibleAnyInvocableEmptyLhsEmptyRhs,
+    AssignCompatibleAnyInvocableEmptyLhsNonemptyRhs, AssignNullptrNonemptyLhs,
+    AssignNullFunctionPtrNonemptyLhs, AssignNullMemberFunctionPtrNonemptyLhs,
+    AssignNullMemberObjectPtrNonemptyLhs, AssignMemberFunctionPtrNonemptyLhs,
+    AssignMemberObjectPtrNonemptyLhs, AssignFunctionReferenceDecayNonemptyLhs,
+    AssignCompatibleAnyInvocableNonemptyLhsEmptyRhs,
+    AssignCompatibleAnyInvocableNonemptyLhsNonemptyRhs, SwapEmptyLhsEmptyRhs,
+    SwapEmptyLhsNonemptyRhs, SwapNonemptyLhsEmptyRhs,
+    SwapNonemptyLhsNonemptyRhs);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(
+    NonRvalueCallMayThrow, AnyInvTestCombinatoric,
+    TestParameterListNonRvalueQualifiersCallMayThrow);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallMayThrow, AnyInvTestCombinatoric,
+                               TestParameterListRvalueQualifiersCallMayThrow);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteMovable, AnyInvTestCombinatoric,
+                               TestParameterListRemoteMovable);
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteNonMovable, AnyInvTestCombinatoric,
+                               TestParameterListRemoteNonMovable);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(Local, AnyInvTestCombinatoric,
+                               TestParameterListLocal);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(NonRvalueCallNothrow, AnyInvTestCombinatoric,
+                               TestParameterListNonRvalueQualifiersNothrowCall);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallNothrow, AnyInvTestCombinatoric,
+                               TestParameterListRvalueQualifiersNothrowCall);
+
+REGISTER_TYPED_TEST_SUITE_P(AnyInvTestMovable,
+                            ConversionConstructionUserDefinedType,
+                            ConversionConstructionVoidCovariance,
+                            ConversionAssignUserDefinedTypeEmptyLhs,
+                            ConversionAssignUserDefinedTypeNonemptyLhs,
+                            ConversionAssignVoidCovariance);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(
+    NonRvalueCallMayThrow, AnyInvTestMovable,
+    TestParameterListNonRvalueQualifiersCallMayThrow);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallMayThrow, AnyInvTestMovable,
+                               TestParameterListRvalueQualifiersCallMayThrow);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteMovable, AnyInvTestMovable,
+                               TestParameterListRemoteMovable);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(Local, AnyInvTestMovable,
+                               TestParameterListLocal);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(NonRvalueCallNothrow, AnyInvTestMovable,
+                               TestParameterListNonRvalueQualifiersNothrowCall);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallNothrow, AnyInvTestMovable,
+                               TestParameterListRvalueQualifiersNothrowCall);
+
+REGISTER_TYPED_TEST_SUITE_P(AnyInvTestNoexceptFalse,
+                            ConversionConstructionConstraints,
+                            ConversionAssignConstraints);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(
+    NonRvalueCallMayThrow, AnyInvTestNoexceptFalse,
+    TestParameterListNonRvalueQualifiersCallMayThrow);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallMayThrow, AnyInvTestNoexceptFalse,
+                               TestParameterListRvalueQualifiersCallMayThrow);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteMovable, AnyInvTestNoexceptFalse,
+                               TestParameterListRemoteMovable);
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteNonMovable, AnyInvTestNoexceptFalse,
+                               TestParameterListRemoteNonMovable);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(Local, AnyInvTestNoexceptFalse,
+                               TestParameterListLocal);
+
+REGISTER_TYPED_TEST_SUITE_P(AnyInvTestNoexceptTrue,
+                            ConversionConstructionConstraints,
+                            ConversionAssignConstraints);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(NonRvalueCallNothrow, AnyInvTestNoexceptTrue,
+                               TestParameterListNonRvalueQualifiersNothrowCall);
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallNothrow, AnyInvTestNoexceptTrue,
+                               TestParameterListRvalueQualifiersNothrowCall);
+
+REGISTER_TYPED_TEST_SUITE_P(AnyInvTestNonRvalue,
+                            ConversionConstructionReferenceWrapper,
+                            NonMoveableResultType,
+                            ConversionAssignReferenceWrapperEmptyLhs,
+                            ConversionAssignReferenceWrapperNonemptyLhs);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(
+    NonRvalueCallMayThrow, AnyInvTestNonRvalue,
+    TestParameterListNonRvalueQualifiersCallMayThrow);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteMovable, AnyInvTestNonRvalue,
+                               TestParameterListRemoteMovable);
+INSTANTIATE_TYPED_TEST_SUITE_P(RemoteNonMovable, AnyInvTestNonRvalue,
+                               TestParameterListRemoteNonMovable);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(Local, AnyInvTestNonRvalue,
+                               TestParameterListLocal);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(NonRvalueCallNothrow, AnyInvTestNonRvalue,
+                               TestParameterListNonRvalueQualifiersNothrowCall);
+
+REGISTER_TYPED_TEST_SUITE_P(AnyInvTestRvalue,
+                            ConversionConstructionReferenceWrapper,
+                            NonMoveableResultType,
+                            ConversionAssignReferenceWrapper,
+                            NonConstCrashesOnSecondCall,
+                            QualifierIndependentObjectLifetime);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(RvalueCallMayThrow, AnyInvTestRvalue,
+                               TestParameterListRvalueQualifiersCallMayThrow);
+
+INSTANTIATE_TYPED_TEST_SUITE_P(CallNothrowRvalue, AnyInvTestRvalue,
+                               TestParameterListRvalueQualifiersNothrowCall);
+
+// Minimal SFINAE testing for platforms where we can't run the tests, but we can
+// build binaries for.
+static_assert(
+    std::is_convertible<void (*)(), absl::AnyInvocable<void() &&>>::value, "");
+static_assert(!std::is_convertible<void*, absl::AnyInvocable<void() &&>>::value,
+              "");
+
+#undef ABSL_INTERNAL_NOEXCEPT_SPEC
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/functional/bind_front.h b/third_party/abseil-cpp/absl/functional/bind_front.h
index 5b47970e35..f9075bd1d5 100644
--- a/third_party/abseil-cpp/absl/functional/bind_front.h
+++ b/third_party/abseil-cpp/absl/functional/bind_front.h
@@ -30,6 +30,10 @@
 #ifndef ABSL_FUNCTIONAL_BIND_FRONT_H_
 #define ABSL_FUNCTIONAL_BIND_FRONT_H_
 
+#if defined(__cpp_lib_bind_front) && __cpp_lib_bind_front >= 201907L
+#include <functional>  // For std::bind_front.
+#endif  // defined(__cpp_lib_bind_front) && __cpp_lib_bind_front >= 201907L
+
 #include "absl/functional/internal/front_binder.h"
 #include "absl/utility/utility.h"
 
@@ -46,7 +50,8 @@ ABSL_NAMESPACE_BEGIN
 // specified. More importantly, it provides more reliable correctness guarantees
 // than `std::bind()`; while `std::bind()` will silently ignore passing more
 // parameters than expected, for example, `absl::bind_front()` will report such
-// mis-uses as errors.
+// mis-uses as errors. In C++20, `absl::bind_front` is replaced by
+// `std::bind_front`.
 //
 // absl::bind_front(a...) can be seen as storing the results of
 // std::make_tuple(a...).
@@ -170,6 +175,9 @@ ABSL_NAMESPACE_BEGIN
 //   // Doesn't copy "hi".
 //   absl::bind_front(Print, absl::string_view(hi))("Chuk");
 //
+#if defined(__cpp_lib_bind_front) && __cpp_lib_bind_front >= 201907L
+using std::bind_front;
+#else   // defined(__cpp_lib_bind_front) && __cpp_lib_bind_front >= 201907L
 template <class F, class... BoundArgs>
 constexpr functional_internal::bind_front_t<F, BoundArgs...> bind_front(
     F&& func, BoundArgs&&... args) {
@@ -177,6 +185,7 @@ constexpr functional_internal::bind_front_t<F, BoundArgs...> bind_front(
       absl::in_place, absl::forward<F>(func),
       absl::forward<BoundArgs>(args)...);
 }
+#endif  // defined(__cpp_lib_bind_front) && __cpp_lib_bind_front >= 201907L
 
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/functional/function_ref.h b/third_party/abseil-cpp/absl/functional/function_ref.h
index 824e3cea9d..f9779607fb 100644
--- a/third_party/abseil-cpp/absl/functional/function_ref.h
+++ b/third_party/abseil-cpp/absl/functional/function_ref.h
@@ -69,7 +69,8 @@ class FunctionRef;
 // An `absl::FunctionRef` is a lightweight wrapper to any invokable object with
 // a compatible signature. Generally, an `absl::FunctionRef` should only be used
 // as an argument type and should be preferred as an argument over a const
-// reference to a `std::function`.
+// reference to a `std::function`. `absl::FunctionRef` itself does not allocate,
+// although the wrapped invokable may.
 //
 // Example:
 //
diff --git a/third_party/abseil-cpp/absl/functional/function_ref_test.cc b/third_party/abseil-cpp/absl/functional/function_ref_test.cc
index 3aa5974587..412027cd2b 100644
--- a/third_party/abseil-cpp/absl/functional/function_ref_test.cc
+++ b/third_party/abseil-cpp/absl/functional/function_ref_test.cc
@@ -14,6 +14,7 @@
 
 #include "absl/functional/function_ref.h"
 
+#include <functional>
 #include <memory>
 
 #include "gmock/gmock.h"
diff --git a/third_party/abseil-cpp/absl/functional/function_ref_benchmark.cc b/third_party/abseil-cpp/absl/functional/function_type_benchmark.cc
index 045305bfef..03dc31d8cd 100644
--- a/third_party/abseil-cpp/absl/functional/function_ref_benchmark.cc
+++ b/third_party/abseil-cpp/absl/functional/function_type_benchmark.cc
@@ -1,4 +1,4 @@
-// Copyright 2019 The Abseil Authors.
+// Copyright 2022 The Abseil Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -12,12 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "absl/functional/function_ref.h"
-
+#include <functional>
 #include <memory>
+#include <string>
 
 #include "benchmark/benchmark.h"
 #include "absl/base/attributes.h"
+#include "absl/functional/any_invocable.h"
+#include "absl/functional/function_ref.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -61,6 +63,12 @@ void BM_TrivialFunctionRef(benchmark::State& state) {
 }
 BENCHMARK(BM_TrivialFunctionRef);
 
+void BM_TrivialAnyInvocable(benchmark::State& state) {
+  ConstructAndCallFunctionBenchmark<AnyInvocable<void()>>(state,
+                                                          TrivialFunctor{});
+}
+BENCHMARK(BM_TrivialAnyInvocable);
+
 void BM_LargeStdFunction(benchmark::State& state) {
   ConstructAndCallFunctionBenchmark<std::function<void()>>(state,
                                                            LargeFunctor{});
@@ -72,6 +80,13 @@ void BM_LargeFunctionRef(benchmark::State& state) {
 }
 BENCHMARK(BM_LargeFunctionRef);
 
+
+void BM_LargeAnyInvocable(benchmark::State& state) {
+  ConstructAndCallFunctionBenchmark<AnyInvocable<void()>>(state,
+                                                          LargeFunctor{});
+}
+BENCHMARK(BM_LargeAnyInvocable);
+
 void BM_FunPtrStdFunction(benchmark::State& state) {
   ConstructAndCallFunctionBenchmark<std::function<void()>>(state, FreeFunction);
 }
@@ -82,6 +97,11 @@ void BM_FunPtrFunctionRef(benchmark::State& state) {
 }
 BENCHMARK(BM_FunPtrFunctionRef);
 
+void BM_FunPtrAnyInvocable(benchmark::State& state) {
+  ConstructAndCallFunctionBenchmark<AnyInvocable<void()>>(state, FreeFunction);
+}
+BENCHMARK(BM_FunPtrAnyInvocable);
+
 // Doesn't include construction or copy overhead in the loop.
 template <typename Function, typename Callable, typename... Args>
 void CallFunctionBenchmark(benchmark::State& state, const Callable& c,
@@ -113,6 +133,12 @@ void BM_TrivialArgsFunctionRef(benchmark::State& state) {
 }
 BENCHMARK(BM_TrivialArgsFunctionRef);
 
+void BM_TrivialArgsAnyInvocable(benchmark::State& state) {
+  CallFunctionBenchmark<AnyInvocable<void(int, int, int)>>(
+      state, FunctorWithTrivialArgs{}, 1, 2, 3);
+}
+BENCHMARK(BM_TrivialArgsAnyInvocable);
+
 struct FunctorWithNonTrivialArgs {
   void operator()(std::string a, std::string b, std::string c) const {
     benchmark::DoNotOptimize(&a);
@@ -137,6 +163,14 @@ void BM_NonTrivialArgsFunctionRef(benchmark::State& state) {
 }
 BENCHMARK(BM_NonTrivialArgsFunctionRef);
 
+void BM_NonTrivialArgsAnyInvocable(benchmark::State& state) {
+  std::string a, b, c;
+  CallFunctionBenchmark<
+      AnyInvocable<void(std::string, std::string, std::string)>>(
+      state, FunctorWithNonTrivialArgs{}, a, b, c);
+}
+BENCHMARK(BM_NonTrivialArgsAnyInvocable);
+
 }  // namespace
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/functional/internal/any_invocable.h b/third_party/abseil-cpp/absl/functional/internal/any_invocable.h
new file mode 100644
index 0000000000..8fce4bf614
--- /dev/null
+++ b/third_party/abseil-cpp/absl/functional/internal/any_invocable.h
@@ -0,0 +1,877 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Implementation details for `absl::AnyInvocable`
+
+#ifndef ABSL_FUNCTIONAL_INTERNAL_ANY_INVOCABLE_H_
+#define ABSL_FUNCTIONAL_INTERNAL_ANY_INVOCABLE_H_
+
+////////////////////////////////////////////////////////////////////////////////
+//                                                                            //
+// This implementation of the proposed `any_invocable` uses an approach that  //
+// chooses between local storage and remote storage for the contained target  //
+// object based on the target object's size, alignment requirements, and      //
+// whether or not it has a nothrow move constructor. Additional optimizations //
+// are performed when the object is a trivially copyable type [basic.types].  //
+//                                                                            //
+// There are three datamembers per `AnyInvocable` instance                    //
+//                                                                            //
+// 1) A union containing either                                               //
+//        - A pointer to the target object referred to via a void*, or        //
+//        - the target object, emplaced into a raw char buffer                //
+//                                                                            //
+// 2) A function pointer to a "manager" function operation that takes a       //
+//    discriminator and logically branches to either perform a move operation //
+//    or destroy operation based on that discriminator.                       //
+//                                                                            //
+// 3) A function pointer to an "invoker" function operation that invokes the  //
+//    target object, directly returning the result.                           //
+//                                                                            //
+// When in the logically empty state, the manager function is an empty        //
+// function and the invoker function is one that would be undefined-behavior  //
+// to call.                                                                   //
+//                                                                            //
+// An additional optimization is performed when converting from one           //
+// AnyInvocable to another where only the noexcept specification and/or the   //
+// cv/ref qualifiers of the function type differ. In these cases, the         //
+// conversion works by "moving the guts", similar to if they were the same    //
+// exact type, as opposed to having to perform an additional layer of         //
+// wrapping through remote storage.                                           //
+//                                                                            //
+////////////////////////////////////////////////////////////////////////////////
+
+// IWYU pragma: private, include "absl/functional/any_invocable.h"
+
+#include <cassert>
+#include <cstddef>
+#include <cstring>
+#include <functional>
+#include <initializer_list>
+#include <memory>
+#include <new>
+#include <type_traits>
+#include <utility>
+
+#include "absl/base/config.h"
+#include "absl/base/internal/invoke.h"
+#include "absl/base/macros.h"
+#include "absl/meta/type_traits.h"
+#include "absl/utility/utility.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// Helper macro used to prevent spelling `noexcept` in language versions older
+// than C++17, where it is not part of the type system, in order to avoid
+// compilation failures and internal compiler errors.
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+#define ABSL_INTERNAL_NOEXCEPT_SPEC(noex) noexcept(noex)
+#else
+#define ABSL_INTERNAL_NOEXCEPT_SPEC(noex)
+#endif
+
+// Defined in functional/any_invocable.h
+template <class Sig>
+class AnyInvocable;
+
+namespace internal_any_invocable {
+
+// Constants relating to the small-object-storage for AnyInvocable
+enum StorageProperty : std::size_t {
+  kAlignment = alignof(std::max_align_t),  // The alignment of the storage
+  kStorageSize = sizeof(void*) * 2         // The size of the storage
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction for checking if a type is an AnyInvocable instantiation.
+// This is used during conversion operations.
+template <class T>
+struct IsAnyInvocable : std::false_type {};
+
+template <class Sig>
+struct IsAnyInvocable<AnyInvocable<Sig>> : std::true_type {};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A type trait that tells us whether or not a target function type should be
+// stored locally in the small object optimization storage
+template <class T>
+using IsStoredLocally = std::integral_constant<
+    bool, sizeof(T) <= kStorageSize && alignof(T) <= kAlignment &&
+              kAlignment % alignof(T) == 0 &&
+              std::is_nothrow_move_constructible<T>::value>;
+
+// An implementation of std::remove_cvref_t of C++20.
+template <class T>
+using RemoveCVRef =
+    typename std::remove_cv<typename std::remove_reference<T>::type>::type;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// An implementation of the C++ standard INVOKE<R> pseudo-macro, operation is
+// equivalent to std::invoke except that it forces an implicit conversion to the
+// specified return type. If "R" is void, the function is executed and the
+// return value is simply ignored.
+template <class ReturnType, class F, class... P,
+          typename = absl::enable_if_t<std::is_void<ReturnType>::value>>
+void InvokeR(F&& f, P&&... args) {
+  absl::base_internal::invoke(std::forward<F>(f), std::forward<P>(args)...);
+}
+
+template <class ReturnType, class F, class... P,
+          absl::enable_if_t<!std::is_void<ReturnType>::value, int> = 0>
+ReturnType InvokeR(F&& f, P&&... args) {
+  return absl::base_internal::invoke(std::forward<F>(f),
+                                     std::forward<P>(args)...);
+}
+
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+///
+// A metafunction that takes a "T" corresponding to a parameter type of the
+// user's specified function type, and yields the parameter type to use for the
+// type-erased invoker. In order to prevent observable moves, this must be
+// either a reference or, if the type is trivial, the original parameter type
+// itself. Since the parameter type may be incomplete at the point that this
+// metafunction is used, we can only do this optimization for scalar types
+// rather than for any trivial type.
+template <typename T>
+T ForwardImpl(std::true_type);
+
+template <typename T>
+T&& ForwardImpl(std::false_type);
+
+// NOTE: We deliberately use an intermediate struct instead of a direct alias,
+// as a workaround for b/206991861 on MSVC versions < 1924.
+template <class T>
+struct ForwardedParameter {
+  using type = decltype((
+      ForwardImpl<T>)(std::integral_constant<bool,
+                                             std::is_scalar<T>::value>()));
+};
+
+template <class T>
+using ForwardedParameterType = typename ForwardedParameter<T>::type;
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A discriminator when calling the "manager" function that describes operation
+// type-erased operation should be invoked.
+//
+// "relocate_from_to" specifies that the manager should perform a move.
+//
+// "dispose" specifies that the manager should perform a destroy.
+enum class FunctionToCall : bool { relocate_from_to, dispose };
+
+// The portion of `AnyInvocable` state that contains either a pointer to the
+// target object or the object itself in local storage
+union TypeErasedState {
+  struct {
+    // A pointer to the type-erased object when remotely stored
+    void* target;
+    // The size of the object for `RemoteManagerTrivial`
+    std::size_t size;
+  } remote;
+
+  // Local-storage for the type-erased object when small and trivial enough
+  alignas(kAlignment) char storage[kStorageSize];
+};
+
+// A typed accessor for the object in `TypeErasedState` storage
+template <class T>
+T& ObjectInLocalStorage(TypeErasedState* const state) {
+  // We launder here because the storage may be reused with the same type.
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+  return *std::launder(reinterpret_cast<T*>(&state->storage));
+#elif ABSL_HAVE_BUILTIN(__builtin_launder)
+  return *__builtin_launder(reinterpret_cast<T*>(&state->storage));
+#else
+
+  // When `std::launder` or equivalent are not available, we rely on undefined
+  // behavior, which works as intended on Abseil's officially supported
+  // platforms as of Q2 2022.
+#if !defined(__clang__) && defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Wstrict-aliasing"
+#pragma GCC diagnostic push
+#endif
+  return *reinterpret_cast<T*>(&state->storage);
+#if !defined(__clang__) && defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+
+#endif
+}
+
+// The type for functions issuing lifetime-related operations: move and dispose
+// A pointer to such a function is contained in each `AnyInvocable` instance.
+// NOTE: When specifying `FunctionToCall::`dispose, the same state must be
+// passed as both "from" and "to".
+using ManagerType = void(FunctionToCall /*operation*/,
+                         TypeErasedState* /*from*/, TypeErasedState* /*to*/)
+    ABSL_INTERNAL_NOEXCEPT_SPEC(true);
+
+// The type for functions issuing the actual invocation of the object
+// A pointer to such a function is contained in each AnyInvocable instance.
+template <bool SigIsNoexcept, class ReturnType, class... P>
+using InvokerType = ReturnType(TypeErasedState*, ForwardedParameterType<P>...)
+    ABSL_INTERNAL_NOEXCEPT_SPEC(SigIsNoexcept);
+
+// The manager that is used when AnyInvocable is empty
+inline void EmptyManager(FunctionToCall /*operation*/,
+                         TypeErasedState* /*from*/,
+                         TypeErasedState* /*to*/) noexcept {}
+
+// The manager that is used when a target function is in local storage and is
+// a trivially copyable type.
+inline void LocalManagerTrivial(FunctionToCall /*operation*/,
+                                TypeErasedState* const from,
+                                TypeErasedState* const to) noexcept {
+  // This single statement without branching handles both possible operations.
+  //
+  // For FunctionToCall::dispose, "from" and "to" point to the same state, and
+  // so this assignment logically would do nothing.
+  //
+  // Note: Correctness here relies on http://wg21.link/p0593, which has only
+  // become standard in C++20, though implementations do not break it in
+  // practice for earlier versions of C++.
+  //
+  // The correct way to do this without that paper is to first placement-new a
+  // default-constructed T in "to->storage" prior to the memmove, but doing so
+  // requires a different function to be created for each T that is stored
+  // locally, which can cause unnecessary bloat and be less cache friendly.
+  *to = *from;
+
+  // Note: Because the type is trivially copyable, the destructor does not need
+  // to be called ("trivially copyable" requires a trivial destructor).
+}
+
+// The manager that is used when a target function is in local storage and is
+// not a trivially copyable type.
+template <class T>
+void LocalManagerNontrivial(FunctionToCall operation,
+                            TypeErasedState* const from,
+                            TypeErasedState* const to) noexcept {
+  static_assert(IsStoredLocally<T>::value,
+                "Local storage must only be used for supported types.");
+  static_assert(!std::is_trivially_copyable<T>::value,
+                "Locally stored types must be trivially copyable.");
+
+  T& from_object = (ObjectInLocalStorage<T>)(from);
+
+  switch (operation) {
+    case FunctionToCall::relocate_from_to:
+      // NOTE: Requires that the left-hand operand is already empty.
+      ::new (static_cast<void*>(&to->storage)) T(std::move(from_object));
+      ABSL_FALLTHROUGH_INTENDED;
+    case FunctionToCall::dispose:
+      from_object.~T();  // Must not throw. // NOLINT
+      return;
+  }
+  ABSL_INTERNAL_UNREACHABLE;
+}
+
+// The invoker that is used when a target function is in local storage
+// Note: QualTRef here is the target function type along with cv and reference
+// qualifiers that must be used when calling the function.
+template <bool SigIsNoexcept, class ReturnType, class QualTRef, class... P>
+ReturnType LocalInvoker(
+    TypeErasedState* const state,
+    ForwardedParameterType<P>... args) noexcept(SigIsNoexcept) {
+  using RawT = RemoveCVRef<QualTRef>;
+  static_assert(
+      IsStoredLocally<RawT>::value,
+      "Target object must be in local storage in order to be invoked from it.");
+
+  auto& f = (ObjectInLocalStorage<RawT>)(state);
+  return (InvokeR<ReturnType>)(static_cast<QualTRef>(f),
+                               static_cast<ForwardedParameterType<P>>(args)...);
+}
+
+// The manager that is used when a target function is in remote storage and it
+// has a trivial destructor
+inline void RemoteManagerTrivial(FunctionToCall operation,
+                                 TypeErasedState* const from,
+                                 TypeErasedState* const to) noexcept {
+  switch (operation) {
+    case FunctionToCall::relocate_from_to:
+      // NOTE: Requires that the left-hand operand is already empty.
+      to->remote = from->remote;
+      return;
+    case FunctionToCall::dispose:
+#if defined(__cpp_sized_deallocation)
+      ::operator delete(from->remote.target, from->remote.size);
+#else   // __cpp_sized_deallocation
+      ::operator delete(from->remote.target);
+#endif  // __cpp_sized_deallocation
+      return;
+  }
+  ABSL_INTERNAL_UNREACHABLE;
+}
+
+// The manager that is used when a target function is in remote storage and the
+// destructor of the type is not trivial
+template <class T>
+void RemoteManagerNontrivial(FunctionToCall operation,
+                             TypeErasedState* const from,
+                             TypeErasedState* const to) noexcept {
+  static_assert(!IsStoredLocally<T>::value,
+                "Remote storage must only be used for types that do not "
+                "qualify for local storage.");
+
+  switch (operation) {
+    case FunctionToCall::relocate_from_to:
+      // NOTE: Requires that the left-hand operand is already empty.
+      to->remote.target = from->remote.target;
+      return;
+    case FunctionToCall::dispose:
+      ::delete static_cast<T*>(from->remote.target);  // Must not throw.
+      return;
+  }
+  ABSL_INTERNAL_UNREACHABLE;
+}
+
+// The invoker that is used when a target function is in remote storage
+template <bool SigIsNoexcept, class ReturnType, class QualTRef, class... P>
+ReturnType RemoteInvoker(
+    TypeErasedState* const state,
+    ForwardedParameterType<P>... args) noexcept(SigIsNoexcept) {
+  using RawT = RemoveCVRef<QualTRef>;
+  static_assert(!IsStoredLocally<RawT>::value,
+                "Target object must be in remote storage in order to be "
+                "invoked from it.");
+
+  auto& f = *static_cast<RawT*>(state->remote.target);
+  return (InvokeR<ReturnType>)(static_cast<QualTRef>(f),
+                               static_cast<ForwardedParameterType<P>>(args)...);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction that checks if a type T is an instantiation of
+// absl::in_place_type_t (needed for constructor constraints of AnyInvocable).
+template <class T>
+struct IsInPlaceType : std::false_type {};
+
+template <class T>
+struct IsInPlaceType<absl::in_place_type_t<T>> : std::true_type {};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A constructor name-tag used with CoreImpl (below) to request the
+// conversion-constructor. QualDecayedTRef is the decayed-type of the object to
+// wrap, along with the cv and reference qualifiers that must be applied when
+// performing an invocation of the wrapped object.
+template <class QualDecayedTRef>
+struct TypedConversionConstruct {};
+
+// A helper base class for all core operations of AnyInvocable. Most notably,
+// this class creates the function call operator and constraint-checkers so that
+// the top-level class does not have to be a series of partial specializations.
+//
+// Note: This definition exists (as opposed to being a declaration) so that if
+// the user of the top-level template accidentally passes a template argument
+// that is not a function type, they will get a static_assert in AnyInvocable's
+// class body rather than an error stating that Impl is not defined.
+template <class Sig>
+class Impl {};  // Note: This is partially-specialized later.
+
+// A std::unique_ptr deleter that deletes memory allocated via ::operator new.
+#if defined(__cpp_sized_deallocation)
+class TrivialDeleter {
+ public:
+  explicit TrivialDeleter(std::size_t size) : size_(size) {}
+
+  void operator()(void* target) const {
+    ::operator delete(target, size_);
+  }
+
+ private:
+  std::size_t size_;
+};
+#else   // __cpp_sized_deallocation
+class TrivialDeleter {
+ public:
+  explicit TrivialDeleter(std::size_t) {}
+
+  void operator()(void* target) const { ::operator delete(target); }
+};
+#endif  // __cpp_sized_deallocation
+
+template <bool SigIsNoexcept, class ReturnType, class... P>
+class CoreImpl;
+
+constexpr bool IsCompatibleConversion(void*, void*) { return false; }
+template <bool NoExceptSrc, bool NoExceptDest, class... T>
+constexpr bool IsCompatibleConversion(CoreImpl<NoExceptSrc, T...>*,
+                                      CoreImpl<NoExceptDest, T...>*) {
+  return !NoExceptDest || NoExceptSrc;
+}
+
+// A helper base class for all core operations of AnyInvocable that do not
+// depend on the cv/ref qualifiers of the function type.
+template <bool SigIsNoexcept, class ReturnType, class... P>
+class CoreImpl {
+ public:
+  using result_type = ReturnType;
+
+  CoreImpl() noexcept : manager_(EmptyManager), invoker_(nullptr) {}
+
+  enum class TargetType : int {
+    kPointer = 0,
+    kCompatibleAnyInvocable = 1,
+    kIncompatibleAnyInvocable = 2,
+    kOther = 3,
+  };
+
+  // Note: QualDecayedTRef here includes the cv-ref qualifiers associated with
+  // the invocation of the Invocable. The unqualified type is the target object
+  // type to be stored.
+  template <class QualDecayedTRef, class F>
+  explicit CoreImpl(TypedConversionConstruct<QualDecayedTRef>, F&& f) {
+    using DecayedT = RemoveCVRef<QualDecayedTRef>;
+
+    constexpr TargetType kTargetType =
+        (std::is_pointer<DecayedT>::value ||
+         std::is_member_pointer<DecayedT>::value)
+            ? TargetType::kPointer
+        : IsCompatibleAnyInvocable<DecayedT>::value
+            ? TargetType::kCompatibleAnyInvocable
+        : IsAnyInvocable<DecayedT>::value
+            ? TargetType::kIncompatibleAnyInvocable
+            : TargetType::kOther;
+    // NOTE: We only use integers instead of enums as template parameters in
+    // order to work around a bug on C++14 under MSVC 2017.
+    // See b/236131881.
+    Initialize<static_cast<int>(kTargetType), QualDecayedTRef>(
+        std::forward<F>(f));
+  }
+
+  // Note: QualTRef here includes the cv-ref qualifiers associated with the
+  // invocation of the Invocable. The unqualified type is the target object
+  // type to be stored.
+  template <class QualTRef, class... Args>
+  explicit CoreImpl(absl::in_place_type_t<QualTRef>, Args&&... args) {
+    InitializeStorage<QualTRef>(std::forward<Args>(args)...);
+  }
+
+  CoreImpl(CoreImpl&& other) noexcept {
+    other.manager_(FunctionToCall::relocate_from_to, &other.state_, &state_);
+    manager_ = other.manager_;
+    invoker_ = other.invoker_;
+    other.manager_ = EmptyManager;
+    other.invoker_ = nullptr;
+  }
+
+  CoreImpl& operator=(CoreImpl&& other) noexcept {
+    // Put the left-hand operand in an empty state.
+    //
+    // Note: A full reset that leaves us with an object that has its invariants
+    // intact is necessary in order to handle self-move. This is required by
+    // types that are used with certain operations of the standard library, such
+    // as the default definition of std::swap when both operands target the same
+    // object.
+    Clear();
+
+    // Perform the actual move/destory operation on the target function.
+    other.manager_(FunctionToCall::relocate_from_to, &other.state_, &state_);
+    manager_ = other.manager_;
+    invoker_ = other.invoker_;
+    other.manager_ = EmptyManager;
+    other.invoker_ = nullptr;
+
+    return *this;
+  }
+
+  ~CoreImpl() { manager_(FunctionToCall::dispose, &state_, &state_); }
+
+  // Check whether or not the AnyInvocable is in the empty state.
+  bool HasValue() const { return invoker_ != nullptr; }
+
+  // Effects: Puts the object into its empty state.
+  void Clear() {
+    manager_(FunctionToCall::dispose, &state_, &state_);
+    manager_ = EmptyManager;
+    invoker_ = nullptr;
+  }
+
+  template <int target_type, class QualDecayedTRef, class F,
+            absl::enable_if_t<target_type == 0, int> = 0>
+  void Initialize(F&& f) {
+// This condition handles types that decay into pointers, which includes
+// function references. Since function references cannot be null, GCC warns
+// against comparing their decayed form with nullptr.
+// Since this is template-heavy code, we prefer to disable these warnings
+// locally instead of adding yet another overload of this function.
+#if !defined(__clang__) && defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Wpragmas"
+#pragma GCC diagnostic ignored "-Waddress"
+#pragma GCC diagnostic ignored "-Wnonnull-compare"
+#pragma GCC diagnostic push
+#endif
+    if (static_cast<RemoveCVRef<QualDecayedTRef>>(f) == nullptr) {
+#if !defined(__clang__) && defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+      manager_ = EmptyManager;
+      invoker_ = nullptr;
+      return;
+    }
+    InitializeStorage<QualDecayedTRef>(std::forward<F>(f));
+  }
+
+  template <int target_type, class QualDecayedTRef, class F,
+            absl::enable_if_t<target_type == 1, int> = 0>
+  void Initialize(F&& f) {
+    // In this case we can "steal the guts" of the other AnyInvocable.
+    f.manager_(FunctionToCall::relocate_from_to, &f.state_, &state_);
+    manager_ = f.manager_;
+    invoker_ = f.invoker_;
+
+    f.manager_ = EmptyManager;
+    f.invoker_ = nullptr;
+  }
+
+  template <int target_type, class QualDecayedTRef, class F,
+            absl::enable_if_t<target_type == 2, int> = 0>
+  void Initialize(F&& f) {
+    if (f.HasValue()) {
+      InitializeStorage<QualDecayedTRef>(std::forward<F>(f));
+    } else {
+      manager_ = EmptyManager;
+      invoker_ = nullptr;
+    }
+  }
+
+  template <int target_type, class QualDecayedTRef, class F,
+            typename = absl::enable_if_t<target_type == 3>>
+  void Initialize(F&& f) {
+    InitializeStorage<QualDecayedTRef>(std::forward<F>(f));
+  }
+
+  // Use local (inline) storage for applicable target object types.
+  template <class QualTRef, class... Args,
+            typename = absl::enable_if_t<
+                IsStoredLocally<RemoveCVRef<QualTRef>>::value>>
+  void InitializeStorage(Args&&... args) {
+    using RawT = RemoveCVRef<QualTRef>;
+    ::new (static_cast<void*>(&state_.storage))
+        RawT(std::forward<Args>(args)...);
+
+    invoker_ = LocalInvoker<SigIsNoexcept, ReturnType, QualTRef, P...>;
+    // We can simplify our manager if we know the type is trivially copyable.
+    InitializeLocalManager<RawT>();
+  }
+
+  // Use remote storage for target objects that cannot be stored locally.
+  template <class QualTRef, class... Args,
+            absl::enable_if_t<!IsStoredLocally<RemoveCVRef<QualTRef>>::value,
+                              int> = 0>
+  void InitializeStorage(Args&&... args) {
+    InitializeRemoteManager<RemoveCVRef<QualTRef>>(std::forward<Args>(args)...);
+    // This is set after everything else in case an exception is thrown in an
+    // earlier step of the initialization.
+    invoker_ = RemoteInvoker<SigIsNoexcept, ReturnType, QualTRef, P...>;
+  }
+
+  template <class T,
+            typename = absl::enable_if_t<std::is_trivially_copyable<T>::value>>
+  void InitializeLocalManager() {
+    manager_ = LocalManagerTrivial;
+  }
+
+  template <class T,
+            absl::enable_if_t<!std::is_trivially_copyable<T>::value, int> = 0>
+  void InitializeLocalManager() {
+    manager_ = LocalManagerNontrivial<T>;
+  }
+
+  template <class T>
+  using HasTrivialRemoteStorage =
+      std::integral_constant<bool, std::is_trivially_destructible<T>::value &&
+                                       alignof(T) <=
+                                           ABSL_INTERNAL_DEFAULT_NEW_ALIGNMENT>;
+
+  template <class T, class... Args,
+            typename = absl::enable_if_t<HasTrivialRemoteStorage<T>::value>>
+  void InitializeRemoteManager(Args&&... args) {
+    // unique_ptr is used for exception-safety in case construction throws.
+    std::unique_ptr<void, TrivialDeleter> uninitialized_target(
+        ::operator new(sizeof(T)), TrivialDeleter(sizeof(T)));
+    ::new (uninitialized_target.get()) T(std::forward<Args>(args)...);
+    state_.remote.target = uninitialized_target.release();
+    state_.remote.size = sizeof(T);
+    manager_ = RemoteManagerTrivial;
+  }
+
+  template <class T, class... Args,
+            absl::enable_if_t<!HasTrivialRemoteStorage<T>::value, int> = 0>
+  void InitializeRemoteManager(Args&&... args) {
+    state_.remote.target = ::new T(std::forward<Args>(args)...);
+    manager_ = RemoteManagerNontrivial<T>;
+  }
+
+  //////////////////////////////////////////////////////////////////////////////
+  //
+  // Type trait to determine if the template argument is an AnyInvocable whose
+  // function type is compatible enough with ours such that we can
+  // "move the guts" out of it when moving, rather than having to place a new
+  // object into remote storage.
+
+  template <typename Other>
+  struct IsCompatibleAnyInvocable {
+    static constexpr bool value = false;
+  };
+
+  template <typename Sig>
+  struct IsCompatibleAnyInvocable<AnyInvocable<Sig>> {
+    static constexpr bool value =
+        (IsCompatibleConversion)(static_cast<
+                                     typename AnyInvocable<Sig>::CoreImpl*>(
+                                     nullptr),
+                                 static_cast<CoreImpl*>(nullptr));
+  };
+
+  //
+  //////////////////////////////////////////////////////////////////////////////
+
+  TypeErasedState state_;
+  ManagerType* manager_;
+  InvokerType<SigIsNoexcept, ReturnType, P...>* invoker_;
+};
+
+// A constructor name-tag used with Impl to request the
+// conversion-constructor
+struct ConversionConstruct {};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction that is normally an identity metafunction except that when
+// given a std::reference_wrapper<T>, it yields T&. This is necessary because
+// currently std::reference_wrapper's operator() is not conditionally noexcept,
+// so when checking if such an Invocable is nothrow-invocable, we must pull out
+// the underlying type.
+template <class T>
+struct UnwrapStdReferenceWrapperImpl {
+  using type = T;
+};
+
+template <class T>
+struct UnwrapStdReferenceWrapperImpl<std::reference_wrapper<T>> {
+  using type = T&;
+};
+
+template <class T>
+using UnwrapStdReferenceWrapper =
+    typename UnwrapStdReferenceWrapperImpl<T>::type;
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// An alias that always yields std::true_type (used with constraints) where
+// substitution failures happen when forming the template arguments.
+template <class... T>
+using TrueAlias =
+    std::integral_constant<bool, sizeof(absl::void_t<T...>*) != 0>;
+
+/*SFINAE constraints for the conversion-constructor.*/
+template <class Sig, class F,
+          class = absl::enable_if_t<
+              !std::is_same<RemoveCVRef<F>, AnyInvocable<Sig>>::value>>
+using CanConvert = TrueAlias<
+    absl::enable_if_t<!IsInPlaceType<RemoveCVRef<F>>::value>,
+    absl::enable_if_t<Impl<Sig>::template CallIsValid<F>::value>,
+    absl::enable_if_t<
+        Impl<Sig>::template CallIsNoexceptIfSigIsNoexcept<F>::value>,
+    absl::enable_if_t<std::is_constructible<absl::decay_t<F>, F>::value>>;
+
+/*SFINAE constraints for the std::in_place constructors.*/
+template <class Sig, class F, class... Args>
+using CanEmplace = TrueAlias<
+    absl::enable_if_t<Impl<Sig>::template CallIsValid<F>::value>,
+    absl::enable_if_t<
+        Impl<Sig>::template CallIsNoexceptIfSigIsNoexcept<F>::value>,
+    absl::enable_if_t<std::is_constructible<absl::decay_t<F>, Args...>::value>>;
+
+/*SFINAE constraints for the conversion-assign operator.*/
+template <class Sig, class F,
+          class = absl::enable_if_t<
+              !std::is_same<RemoveCVRef<F>, AnyInvocable<Sig>>::value>>
+using CanAssign = TrueAlias<
+    absl::enable_if_t<Impl<Sig>::template CallIsValid<F>::value>,
+    absl::enable_if_t<
+        Impl<Sig>::template CallIsNoexceptIfSigIsNoexcept<F>::value>,
+    absl::enable_if_t<std::is_constructible<absl::decay_t<F>, F>::value>>;
+
+/*SFINAE constraints for the reference-wrapper conversion-assign operator.*/
+template <class Sig, class F>
+using CanAssignReferenceWrapper = TrueAlias<
+    absl::enable_if_t<
+        Impl<Sig>::template CallIsValid<std::reference_wrapper<F>>::value>,
+    absl::enable_if_t<Impl<Sig>::template CallIsNoexceptIfSigIsNoexcept<
+        std::reference_wrapper<F>>::value>>;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// The constraint for checking whether or not a call meets the noexcept
+// callability requirements. This is a preprocessor macro because specifying it
+// this way as opposed to a disjunction/branch can improve the user-side error
+// messages and avoids an instantiation of std::is_nothrow_invocable_r in the
+// cases where the user did not specify a noexcept function type.
+//
+#define ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT(inv_quals, noex) \
+  ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT_##noex(inv_quals)
+
+// The disjunction below is because we can't rely on std::is_nothrow_invocable_r
+// to give the right result when ReturnType is non-moveable in toolchains that
+// don't treat non-moveable result types correctly. For example this was the
+// case in libc++ before commit c3a24882 (2022-05).
+#define ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT_true(inv_quals)      \
+  absl::enable_if_t<absl::disjunction<                                       \
+      std::is_nothrow_invocable_r<                                           \
+          ReturnType, UnwrapStdReferenceWrapper<absl::decay_t<F>> inv_quals, \
+          P...>,                                                             \
+      std::conjunction<                                                      \
+          std::is_nothrow_invocable<                                         \
+              UnwrapStdReferenceWrapper<absl::decay_t<F>> inv_quals, P...>,  \
+          std::is_same<                                                      \
+              ReturnType,                                                    \
+              absl::base_internal::invoke_result_t<                          \
+                  UnwrapStdReferenceWrapper<absl::decay_t<F>> inv_quals,     \
+                  P...>>>>::value>
+
+#define ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT_false(inv_quals)
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A macro to generate partial specializations of Impl with the different
+// combinations of supported cv/reference qualifiers and noexcept specifier.
+//
+// Here, `cv` are the cv-qualifiers if any, `ref` is the ref-qualifier if any,
+// inv_quals is the reference type to be used when invoking the target, and
+// noex is "true" if the function type is noexcept, or false if it is not.
+//
+// The CallIsValid condition is more complicated than simply using
+// absl::base_internal::is_invocable_r because we can't rely on it to give the
+// right result when ReturnType is non-moveable in toolchains that don't treat
+// non-moveable result types correctly. For example this was the case in libc++
+// before commit c3a24882 (2022-05).
+#define ABSL_INTERNAL_ANY_INVOCABLE_IMPL_(cv, ref, inv_quals, noex)            \
+  template <class ReturnType, class... P>                                      \
+  class Impl<ReturnType(P...) cv ref ABSL_INTERNAL_NOEXCEPT_SPEC(noex)>        \
+      : public CoreImpl<noex, ReturnType, P...> {                              \
+   public:                                                                     \
+    /*The base class, which contains the datamembers and core operations*/     \
+    using Core = CoreImpl<noex, ReturnType, P...>;                             \
+                                                                               \
+    /*SFINAE constraint to check if F is invocable with the proper signature*/ \
+    template <class F>                                                         \
+    using CallIsValid = TrueAlias<absl::enable_if_t<absl::disjunction<         \
+        absl::base_internal::is_invocable_r<ReturnType,                        \
+                                            absl::decay_t<F> inv_quals, P...>, \
+        std::is_same<ReturnType,                                               \
+                     absl::base_internal::invoke_result_t<                     \
+                         absl::decay_t<F> inv_quals, P...>>>::value>>;         \
+                                                                               \
+    /*SFINAE constraint to check if F is nothrow-invocable when necessary*/    \
+    template <class F>                                                         \
+    using CallIsNoexceptIfSigIsNoexcept =                                      \
+        TrueAlias<ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT(inv_quals,   \
+                                                                  noex)>;      \
+                                                                               \
+    /*Put the AnyInvocable into an empty state.*/                              \
+    Impl() = default;                                                          \
+                                                                               \
+    /*The implementation of a conversion-constructor from "f*/                 \
+    /*This forwards to Core, attaching inv_quals so that the base class*/      \
+    /*knows how to properly type-erase the invocation.*/                       \
+    template <class F>                                                         \
+    explicit Impl(ConversionConstruct, F&& f)                                  \
+        : Core(TypedConversionConstruct<                                       \
+                   typename std::decay<F>::type inv_quals>(),                  \
+               std::forward<F>(f)) {}                                          \
+                                                                               \
+    /*Forward along the in-place construction parameters.*/                    \
+    template <class T, class... Args>                                          \
+    explicit Impl(absl::in_place_type_t<T>, Args&&... args)                    \
+        : Core(absl::in_place_type<absl::decay_t<T> inv_quals>,                \
+               std::forward<Args>(args)...) {}                                 \
+                                                                               \
+    InvokerType<noex, ReturnType, P...>* ExtractInvoker() cv {                 \
+      using QualifiedTestType = int cv ref;                                    \
+      auto* invoker = this->invoker_;                                          \
+      if (!std::is_const<QualifiedTestType>::value &&                          \
+          std::is_rvalue_reference<QualifiedTestType>::value) {                \
+        ABSL_HARDENING_ASSERT([this]() {                                       \
+          /* We checked that this isn't const above, so const_cast is safe */  \
+          const_cast<Impl*>(this)->invoker_ =                                  \
+              [](TypeErasedState*,                                             \
+                 ForwardedParameterType<P>...) noexcept(noex) -> ReturnType {  \
+            ABSL_HARDENING_ASSERT(false && "AnyInvocable use-after-move");     \
+            std::terminate();                                                  \
+          };                                                                   \
+          return this->HasValue();                                             \
+        }());                                                                  \
+      }                                                                        \
+      return invoker;                                                          \
+    }                                                                          \
+                                                                               \
+    /*The actual invocation operation with the proper signature*/              \
+    ReturnType operator()(P... args) cv ref noexcept(noex) {                   \
+      assert(this->invoker_ != nullptr);                                       \
+      return this->ExtractInvoker()(                                           \
+          const_cast<TypeErasedState*>(&this->state_),                         \
+          static_cast<ForwardedParameterType<P>>(args)...);                    \
+    }                                                                          \
+  }
+
+// Define the `noexcept(true)` specialization only for C++17 and beyond, when
+// `noexcept` is part of the type system.
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+// A convenience macro that defines specializations for the noexcept(true) and
+// noexcept(false) forms, given the other properties.
+#define ABSL_INTERNAL_ANY_INVOCABLE_IMPL(cv, ref, inv_quals)    \
+  ABSL_INTERNAL_ANY_INVOCABLE_IMPL_(cv, ref, inv_quals, false); \
+  ABSL_INTERNAL_ANY_INVOCABLE_IMPL_(cv, ref, inv_quals, true)
+#else
+#define ABSL_INTERNAL_ANY_INVOCABLE_IMPL(cv, ref, inv_quals) \
+  ABSL_INTERNAL_ANY_INVOCABLE_IMPL_(cv, ref, inv_quals, false)
+#endif
+
+// Non-ref-qualified partial specializations
+ABSL_INTERNAL_ANY_INVOCABLE_IMPL(, , &);
+ABSL_INTERNAL_ANY_INVOCABLE_IMPL(const, , const&);
+
+// Lvalue-ref-qualified partial specializations
+ABSL_INTERNAL_ANY_INVOCABLE_IMPL(, &, &);
+ABSL_INTERNAL_ANY_INVOCABLE_IMPL(const, &, const&);
+
+// Rvalue-ref-qualified partial specializations
+ABSL_INTERNAL_ANY_INVOCABLE_IMPL(, &&, &&);
+ABSL_INTERNAL_ANY_INVOCABLE_IMPL(const, &&, const&&);
+
+// Undef the detail-only macros.
+#undef ABSL_INTERNAL_ANY_INVOCABLE_IMPL
+#undef ABSL_INTERNAL_ANY_INVOCABLE_IMPL_
+#undef ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT_false
+#undef ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT_true
+#undef ABSL_INTERNAL_ANY_INVOCABLE_NOEXCEPT_CONSTRAINT
+#undef ABSL_INTERNAL_NOEXCEPT_SPEC
+
+}  // namespace internal_any_invocable
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_FUNCTIONAL_INTERNAL_ANY_INVOCABLE_H_
diff --git a/third_party/abseil-cpp/absl/hash/BUILD.bazel b/third_party/abseil-cpp/absl/hash/BUILD.bazel
index f0640d34e4..bcc316f925 100644
--- a/third_party/abseil-cpp/absl/hash/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/hash/BUILD.bazel
@@ -41,6 +41,7 @@ cc_library(
         "//absl/base:core_headers",
         "//absl/base:endian",
         "//absl/container:fixed_array",
+        "//absl/functional:function_ref",
         "//absl/meta:type_traits",
         "//absl/numeric:int128",
         "//absl/strings",
@@ -74,7 +75,11 @@ cc_test(
         ":hash_testing",
         ":spy_hash_state",
         "//absl/base:core_headers",
+        "//absl/container:btree",
+        "//absl/container:flat_hash_map",
         "//absl/container:flat_hash_set",
+        "//absl/container:node_hash_map",
+        "//absl/container:node_hash_set",
         "//absl/meta:type_traits",
         "//absl/numeric:int128",
         "//absl/strings:cord_test_helpers",
@@ -93,6 +98,7 @@ cc_binary(
     deps = [
         ":hash",
         "//absl/base:core_headers",
+        "//absl/container:flat_hash_set",
         "//absl/random",
         "//absl/strings",
         "//absl/strings:cord",
diff --git a/third_party/abseil-cpp/absl/hash/BUILD.gn b/third_party/abseil-cpp/absl/hash/BUILD.gn
new file mode 100644
index 0000000000..2170f4e806
--- /dev/null
+++ b/third_party/abseil-cpp/absl/hash/BUILD.gn
@@ -0,0 +1,100 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build_overrides/build.gni")
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("hash") {
+  sources = [
+    "internal/hash.cc",
+    "internal/hash.h",
+  ]
+  public = [ "hash.h" ]
+  deps = [
+    ":city",
+    ":low_level_hash",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/container:fixed_array",
+    "//third_party/abseil-cpp/absl/functional:function_ref",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/types:variant",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("hash_testing") {
+  testonly = true
+  public = [ "hash_testing.h" ]
+  deps = [
+    ":spy_hash_state",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:variant",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_test("hash_test") {
+  sources = [ "hash_test.cc" ]
+  deps = [
+    ":hash",
+    ":hash_testing",
+    ":spy_hash_state",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/container:btree",
+    "//third_party/abseil-cpp/absl/container:flat_hash_map",
+    "//third_party/abseil-cpp/absl/container:flat_hash_set",
+    "//third_party/abseil-cpp/absl/container:node_hash_map",
+    "//third_party/abseil-cpp/absl/container:node_hash_set",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+    "//third_party/abseil-cpp/absl/strings:cord_test_helpers",
+  ]
+}
+
+absl_source_set("spy_hash_state") {
+  testonly = true
+  public = [ "internal/spy_hash_state.h" ]
+  deps = [
+    ":hash",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("city") {
+  public = [ "internal/city.h" ]
+  sources = [ "internal/city.cc" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+  ]
+}
+
+absl_source_set("low_level_hash") {
+  public = [ "internal/low_level_hash.h" ]
+  sources = [ "internal/low_level_hash.cc" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+  visibility = [ ":*" ]
+}
+
+absl_test("low_level_hash_test") {
+  sources = [ "internal/low_level_hash_test.cc" ]
+  deps = [
+    ":low_level_hash",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/hash/CMakeLists.txt b/third_party/abseil-cpp/absl/hash/CMakeLists.txt
index 5916ae3cf0..1569125480 100644
--- a/third_party/abseil-cpp/absl/hash/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/hash/CMakeLists.txt
@@ -24,12 +24,13 @@ absl_cc_library(
     "internal/hash.h"
   COPTS
     ${ABSL_DEFAULT_COPTS}
-    DEPS
+  DEPS
     absl::city
     absl::config
     absl::core_headers
     absl::endian
     absl::fixed_array
+    absl::function_ref
     absl::meta
     absl::int128
     absl::strings
@@ -54,6 +55,7 @@ absl_cc_library(
     absl::variant
     GTest::gmock
   TESTONLY
+  PUBLIC
 )
 
 absl_cc_test(
@@ -68,13 +70,22 @@ absl_cc_test(
     absl::hash
     absl::hash_testing
     absl::core_headers
+    absl::btree
+    absl::flat_hash_map
     absl::flat_hash_set
+    absl::node_hash_map
+    absl::node_hash_set
     absl::spy_hash_state
     absl::meta
     absl::int128
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
+#
+# Note: Even though external code should not depend on this target
+# directly, it must be marked PUBLIC since it is a dependency of
+# hash_testing.
 absl_cc_library(
   NAME
     spy_hash_state
@@ -87,8 +98,10 @@ absl_cc_library(
     absl::strings
     absl::str_format
   TESTONLY
+  PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     city
@@ -116,6 +129,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     low_level_hash
diff --git a/third_party/abseil-cpp/absl/hash/hash.h b/third_party/abseil-cpp/absl/hash/hash.h
index 8282ea53c6..74e2d7c053 100644
--- a/third_party/abseil-cpp/absl/hash/hash.h
+++ b/third_party/abseil-cpp/absl/hash/hash.h
@@ -26,9 +26,9 @@
 //     support Abseil hashing without requiring you to define a hashing
 //     algorithm.
 //   * `HashState`, a type-erased class which implements the manipulation of the
-//     hash state (H) itself, contains member functions `combine()` and
-//     `combine_contiguous()`, which you can use to contribute to an existing
-//     hash state when hashing your types.
+//     hash state (H) itself; contains member functions `combine()`,
+//     `combine_contiguous()`, and `combine_unordered()`; and which you can use
+//     to contribute to an existing hash state when hashing your types.
 //
 // Unlike `std::hash` or other hashing frameworks, the Abseil hashing framework
 // provides most of its utility by abstracting away the hash algorithm (and its
@@ -40,6 +40,11 @@
 // each process.  E.g., `absl::Hash<int>{}(9)` in one process and
 // `absl::Hash<int>{}(9)` in another process are likely to differ.
 //
+// `absl::Hash` may also produce different values from different dynamically
+// loaded libraries. For this reason, `absl::Hash` values must never cross
+// boundries in dynamically loaded libraries (including when used in types like
+// hash containers.)
+//
 // `absl::Hash` is intended to strongly mix input bits with a target of passing
 // an [Avalanche Test](https://en.wikipedia.org/wiki/Avalanche_effect).
 //
@@ -74,7 +79,9 @@
 #define ABSL_HASH_HASH_H_
 
 #include <tuple>
+#include <utility>
 
+#include "absl/functional/function_ref.h"
 #include "absl/hash/internal/hash.h"
 
 namespace absl {
@@ -107,14 +114,27 @@ ABSL_NAMESPACE_BEGIN
 //     * std::string_view (as well as any instance of std::basic_string that
 //       uses char and std::char_traits)
 //  * All the standard sequence containers (provided the elements are hashable)
-//  * All the standard ordered associative containers (provided the elements are
+//  * All the standard associative containers (provided the elements are
 //    hashable)
 //  * absl types such as the following:
 //    * absl::string_view
-//    * absl::InlinedVector
-//    * absl::FixedArray
 //    * absl::uint128
 //    * absl::Time, absl::Duration, and absl::TimeZone
+//  * absl containers (provided the elements are hashable) such as the
+//    following:
+//    * absl::flat_hash_set, absl::node_hash_set, absl::btree_set
+//    * absl::flat_hash_map, absl::node_hash_map, absl::btree_map
+//    * absl::btree_multiset, absl::btree_multimap
+//    * absl::InlinedVector
+//    * absl::FixedArray
+//
+// When absl::Hash is used to hash an unordered container with a custom hash
+// functor, the elements are hashed using default absl::Hash semantics, not
+// the custom hash functor.  This is consistent with the behavior of
+// operator==() on unordered containers, which compares elements pairwise with
+// operator==() rather than the custom equality functor.  It is usually a
+// mistake to use either operator==() or absl::Hash on unordered collections
+// that use functors incompatible with operator==() equality.
 //
 // Note: the list above is not meant to be exhaustive. Additional type support
 // may be added, in which case the above list will be updated.
@@ -153,7 +173,8 @@ ABSL_NAMESPACE_BEGIN
 //   that are otherwise difficult to extend using `AbslHashValue()`. (See the
 //   `HashState` class below.)
 //
-// The "hash state" concept contains two member functions for mixing hash state:
+// The "hash state" concept contains three member functions for mixing hash
+// state:
 //
 // * `H::combine(state, values...)`
 //
@@ -187,6 +208,15 @@ ABSL_NAMESPACE_BEGIN
 //    (it may perform internal optimizations). If you need this guarantee, use a
 //    loop instead.
 //
+// * `H::combine_unordered(state, begin, end)`
+//
+//    Combines a set of elements denoted by an iterator pair into a hash
+//    state, returning the updated state.  Note that the existing hash
+//    state is move-only and must be passed by value.
+//
+//    Unlike the other two methods, the hashing is order-independent.
+//    This can be used to hash unordered collections.
+//
 // -----------------------------------------------------------------------------
 // Adding Type Support to `absl::Hash`
 // -----------------------------------------------------------------------------
@@ -243,8 +273,9 @@ size_t HashOf(const Types&... values) {
 // classes, virtual functions, etc.). The type erasure adds overhead so it
 // should be avoided unless necessary.
 //
-// Note: This wrapper will only erase calls to:
+// Note: This wrapper will only erase calls to
 //     combine_contiguous(H, const unsigned char*, size_t)
+//     RunCombineUnordered(H, CombinerF)
 //
 // All other calls will be handled internally and will not invoke overloads
 // provided by the wrapped class.
@@ -318,6 +349,8 @@ class HashState : public hash_internal::HashStateBase<HashState> {
  private:
   HashState() = default;
 
+  friend class HashState::HashStateBase;
+
   template <typename T>
   static void CombineContiguousImpl(void* p, const unsigned char* first,
                                     size_t size) {
@@ -329,16 +362,57 @@ class HashState : public hash_internal::HashStateBase<HashState> {
   void Init(T* state) {
     state_ = state;
     combine_contiguous_ = &CombineContiguousImpl<T>;
+    run_combine_unordered_ = &RunCombineUnorderedImpl<T>;
+  }
+
+  template <typename HS>
+  struct CombineUnorderedInvoker {
+    template <typename T, typename ConsumerT>
+    void operator()(T inner_state, ConsumerT inner_cb) {
+      f(HashState::Create(&inner_state),
+        [&](HashState& inner_erased) { inner_cb(inner_erased.Real<T>()); });
+    }
+
+    absl::FunctionRef<void(HS, absl::FunctionRef<void(HS&)>)> f;
+  };
+
+  template <typename T>
+  static HashState RunCombineUnorderedImpl(
+      HashState state,
+      absl::FunctionRef<void(HashState, absl::FunctionRef<void(HashState&)>)>
+          f) {
+    // Note that this implementation assumes that inner_state and outer_state
+    // are the same type.  This isn't true in the SpyHash case, but SpyHash
+    // types are move-convertible to each other, so this still works.
+    T& real_state = state.Real<T>();
+    real_state = T::RunCombineUnordered(
+        std::move(real_state), CombineUnorderedInvoker<HashState>{f});
+    return state;
+  }
+
+  template <typename CombinerT>
+  static HashState RunCombineUnordered(HashState state, CombinerT combiner) {
+    auto* run = state.run_combine_unordered_;
+    return run(std::move(state), std::ref(combiner));
   }
 
   // Do not erase an already erased state.
   void Init(HashState* state) {
     state_ = state->state_;
     combine_contiguous_ = state->combine_contiguous_;
+    run_combine_unordered_ = state->run_combine_unordered_;
+  }
+
+  template <typename T>
+  T& Real() {
+    return *static_cast<T*>(state_);
   }
 
   void* state_;
   void (*combine_contiguous_)(void*, const unsigned char*, size_t);
+  HashState (*run_combine_unordered_)(
+      HashState state,
+      absl::FunctionRef<void(HashState, absl::FunctionRef<void(HashState&)>)>);
 };
 
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/hash/hash_benchmark.cc b/third_party/abseil-cpp/absl/hash/hash_benchmark.cc
index d498ac29c0..8712a01cca 100644
--- a/third_party/abseil-cpp/absl/hash/hash_benchmark.cc
+++ b/third_party/abseil-cpp/absl/hash/hash_benchmark.cc
@@ -19,6 +19,7 @@
 #include <vector>
 
 #include "absl/base/attributes.h"
+#include "absl/container/flat_hash_set.h"
 #include "absl/hash/hash.h"
 #include "absl/random/random.h"
 #include "absl/strings/cord.h"
@@ -107,6 +108,44 @@ absl::Cord FragmentedCord(size_t size) {
   return result;
 }
 
+template <typename T>
+std::vector<T> Vector(size_t count) {
+  std::vector<T> result;
+  for (size_t v = 0; v < count; ++v) {
+    result.push_back(v);
+  }
+  return result;
+}
+
+// Bogus type that replicates an unorderd_set's bit mixing, but with
+// vector-speed iteration. This is intended to measure the overhead of unordered
+// hashing without counting the speed of unordered_set iteration.
+template <typename T>
+struct FastUnorderedSet {
+  explicit FastUnorderedSet(size_t count) {
+    for (size_t v = 0; v < count; ++v) {
+      values.push_back(v);
+    }
+  }
+  std::vector<T> values;
+
+  template <typename H>
+  friend H AbslHashValue(H h, const FastUnorderedSet& fus) {
+    return H::combine(H::combine_unordered(std::move(h), fus.values.begin(),
+                                           fus.values.end()),
+                      fus.values.size());
+  }
+};
+
+template <typename T>
+absl::flat_hash_set<T> FlatHashSet(size_t count) {
+  absl::flat_hash_set<T> result;
+  for (size_t v = 0; v < count; ++v) {
+    result.insert(v);
+  }
+  return result;
+}
+
 // Generates a benchmark and a codegen method for the provided types.  The
 // codegen method provides a well known entrypoint for dumping assembly.
 #define MAKE_BENCHMARK(hash, name, ...)                          \
@@ -145,10 +184,22 @@ MAKE_BENCHMARK(AbslHash, Cord_Flat_200, FlatCord(200));
 MAKE_BENCHMARK(AbslHash, Cord_Flat_5000, FlatCord(5000));
 MAKE_BENCHMARK(AbslHash, Cord_Fragmented_200, FragmentedCord(200));
 MAKE_BENCHMARK(AbslHash, Cord_Fragmented_5000, FragmentedCord(5000));
-MAKE_BENCHMARK(AbslHash, VectorInt64_10, std::vector<int64_t>(10));
-MAKE_BENCHMARK(AbslHash, VectorInt64_100, std::vector<int64_t>(100));
-MAKE_BENCHMARK(AbslHash, VectorDouble_10, std::vector<double>(10, 1.1));
-MAKE_BENCHMARK(AbslHash, VectorDouble_100, std::vector<double>(100, 1.1));
+MAKE_BENCHMARK(AbslHash, VectorInt64_10, Vector<int64_t>(10));
+MAKE_BENCHMARK(AbslHash, VectorInt64_100, Vector<int64_t>(100));
+MAKE_BENCHMARK(AbslHash, VectorInt64_1000, Vector<int64_t>(1000));
+MAKE_BENCHMARK(AbslHash, VectorDouble_10, Vector<double>(10));
+MAKE_BENCHMARK(AbslHash, VectorDouble_100, Vector<double>(100));
+MAKE_BENCHMARK(AbslHash, VectorDouble_1000, Vector<double>(1000));
+MAKE_BENCHMARK(AbslHash, FlatHashSetInt64_10, FlatHashSet<int64_t>(10));
+MAKE_BENCHMARK(AbslHash, FlatHashSetInt64_100, FlatHashSet<int64_t>(100));
+MAKE_BENCHMARK(AbslHash, FlatHashSetInt64_1000, FlatHashSet<int64_t>(1000));
+MAKE_BENCHMARK(AbslHash, FlatHashSetDouble_10, FlatHashSet<double>(10));
+MAKE_BENCHMARK(AbslHash, FlatHashSetDouble_100, FlatHashSet<double>(100));
+MAKE_BENCHMARK(AbslHash, FlatHashSetDouble_1000, FlatHashSet<double>(1000));
+MAKE_BENCHMARK(AbslHash, FastUnorderedSetInt64_1000,
+               FastUnorderedSet<int64_t>(1000));
+MAKE_BENCHMARK(AbslHash, FastUnorderedSetDouble_1000,
+               FastUnorderedSet<double>(1000));
 MAKE_BENCHMARK(AbslHash, PairStringString_0,
                std::make_pair(std::string(), std::string()));
 MAKE_BENCHMARK(AbslHash, PairStringString_10,
@@ -180,6 +231,24 @@ MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_10,
                std::vector<double>(10, 1.1));
 MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_100,
                std::vector<double>(100, 1.1));
+MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_1000,
+               std::vector<double>(1000, 1.1));
+MAKE_BENCHMARK(TypeErasedAbslHash, FlatHashSetInt64_10,
+               FlatHashSet<int64_t>(10));
+MAKE_BENCHMARK(TypeErasedAbslHash, FlatHashSetInt64_100,
+               FlatHashSet<int64_t>(100));
+MAKE_BENCHMARK(TypeErasedAbslHash, FlatHashSetInt64_1000,
+               FlatHashSet<int64_t>(1000));
+MAKE_BENCHMARK(TypeErasedAbslHash, FlatHashSetDouble_10,
+               FlatHashSet<double>(10));
+MAKE_BENCHMARK(TypeErasedAbslHash, FlatHashSetDouble_100,
+               FlatHashSet<double>(100));
+MAKE_BENCHMARK(TypeErasedAbslHash, FlatHashSetDouble_1000,
+               FlatHashSet<double>(1000));
+MAKE_BENCHMARK(TypeErasedAbslHash, FastUnorderedSetInt64_1000,
+               FastUnorderedSet<int64_t>(1000));
+MAKE_BENCHMARK(TypeErasedAbslHash, FastUnorderedSetDouble_1000,
+               FastUnorderedSet<double>(1000));
 
 // The latency benchmark attempts to model the speed of the hash function in
 // production. When a hash function is used for hashtable lookups it is rarely
diff --git a/third_party/abseil-cpp/absl/hash/hash_test.cc b/third_party/abseil-cpp/absl/hash/hash_test.cc
index b3ddebdd42..744a2e54c8 100644
--- a/third_party/abseil-cpp/absl/hash/hash_test.cc
+++ b/third_party/abseil-cpp/absl/hash/hash_test.cc
@@ -14,12 +14,14 @@
 
 #include "absl/hash/hash.h"
 
+#include <algorithm>
 #include <array>
 #include <bitset>
 #include <cstring>
 #include <deque>
 #include <forward_list>
 #include <functional>
+#include <initializer_list>
 #include <iterator>
 #include <limits>
 #include <list>
@@ -32,12 +34,18 @@
 #include <tuple>
 #include <type_traits>
 #include <unordered_map>
+#include <unordered_set>
 #include <utility>
 #include <vector>
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
+#include "absl/container/btree_map.h"
+#include "absl/container/btree_set.h"
+#include "absl/container/flat_hash_map.h"
 #include "absl/container/flat_hash_set.h"
+#include "absl/container/node_hash_map.h"
+#include "absl/container/node_hash_set.h"
 #include "absl/hash/hash_testing.h"
 #include "absl/hash/internal/spy_hash_state.h"
 #include "absl/meta/type_traits.h"
@@ -46,6 +54,56 @@
 
 namespace {
 
+// Utility wrapper of T for the purposes of testing the `AbslHash` type erasure
+// mechanism.  `TypeErasedValue<T>` can be constructed with a `T`, and can
+// be compared and hashed.  However, all hashing goes through the hashing
+// type-erasure framework.
+template <typename T>
+class TypeErasedValue {
+ public:
+  TypeErasedValue() = default;
+  TypeErasedValue(const TypeErasedValue&) = default;
+  TypeErasedValue(TypeErasedValue&&) = default;
+  explicit TypeErasedValue(const T& n) : n_(n) {}
+
+  template <typename H>
+  friend H AbslHashValue(H hash_state, const TypeErasedValue& v) {
+    v.HashValue(absl::HashState::Create(&hash_state));
+    return hash_state;
+  }
+
+  void HashValue(absl::HashState state) const {
+    absl::HashState::combine(std::move(state), n_);
+  }
+
+  bool operator==(const TypeErasedValue& rhs) const { return n_ == rhs.n_; }
+  bool operator!=(const TypeErasedValue& rhs) const { return !(*this == rhs); }
+
+ private:
+  T n_;
+};
+
+// A TypeErasedValue refinement, for containers.  It exposes the wrapped
+// `value_type` and is constructible from an initializer list.
+template <typename T>
+class TypeErasedContainer : public TypeErasedValue<T> {
+ public:
+  using value_type = typename T::value_type;
+  TypeErasedContainer() = default;
+  TypeErasedContainer(const TypeErasedContainer&) = default;
+  TypeErasedContainer(TypeErasedContainer&&) = default;
+  explicit TypeErasedContainer(const T& n) : TypeErasedValue<T>(n) {}
+  TypeErasedContainer(std::initializer_list<value_type> init_list)
+      : TypeErasedContainer(T(init_list.begin(), init_list.end())) {}
+  // one-argument constructor of value type T, to appease older toolchains that
+  // get confused by one-element initializer lists in some contexts
+  explicit TypeErasedContainer(const value_type& v)
+      : TypeErasedContainer(T(&v, &v + 1)) {}
+};
+
+template <typename T>
+using TypeErasedVector = TypeErasedContainer<std::vector<T>>;
+
 using absl::Hash;
 using absl::hash_internal::SpyHashState;
 
@@ -81,10 +139,10 @@ TYPED_TEST_P(HashValueIntTest, FastPath) {
             absl::Hash<std::tuple<TypeParam>>{}(std::tuple<TypeParam>(n)));
 }
 
-REGISTER_TYPED_TEST_CASE_P(HashValueIntTest, BasicUsage, FastPath);
+REGISTER_TYPED_TEST_SUITE_P(HashValueIntTest, BasicUsage, FastPath);
 using IntTypes = testing::Types<unsigned char, char, int, int32_t, int64_t,
                                 uint32_t, uint64_t, size_t>;
-INSTANTIATE_TYPED_TEST_CASE_P(My, HashValueIntTest, IntTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(My, HashValueIntTest, IntTypes);
 
 enum LegacyEnum { kValue1, kValue2, kValue3 };
 
@@ -127,6 +185,8 @@ TEST(HashValueTest, FloatingPoint) {
 
 TEST(HashValueTest, Pointer) {
   EXPECT_TRUE((is_hashable<int*>::value));
+  EXPECT_TRUE((is_hashable<int(*)(char, float)>::value));
+  EXPECT_TRUE((is_hashable<void(*)(int, int, ...)>::value));
 
   int i;
   int* ptr = &i;
@@ -162,10 +222,89 @@ TEST(HashValueTest, PointerAlignment) {
     // Limit the scope to the bits we would be using for Swisstable.
     constexpr size_t kMask = (1 << (kLog2NumValues + 7)) - 1;
     size_t stuck_bits = (~bits_or | bits_and) & kMask;
-    EXPECT_EQ(stuck_bits, 0) << "0x" << std::hex << stuck_bits;
+    EXPECT_EQ(stuck_bits, 0u) << "0x" << std::hex << stuck_bits;
   }
 }
 
+TEST(HashValueTest, PointerToMember) {
+  struct Bass {
+    void q() {}
+  };
+
+  struct A : Bass {
+    virtual ~A() = default;
+    virtual void vfa() {}
+
+    static auto pq() -> void (A::*)() { return &A::q; }
+  };
+
+  struct B : Bass {
+    virtual ~B() = default;
+    virtual void vfb() {}
+
+    static auto pq() -> void (B::*)() { return &B::q; }
+  };
+
+  struct Foo : A, B {
+    void f1() {}
+    void f2() const {}
+
+    int g1() & { return 0; }
+    int g2() const & { return 0; }
+    int g3() && { return 0; }
+    int g4() const && { return 0; }
+
+    int h1() & { return 0; }
+    int h2() const & { return 0; }
+    int h3() && { return 0; }
+    int h4() const && { return 0; }
+
+    int a;
+    int b;
+
+    const int c = 11;
+    const int d = 22;
+  };
+
+  EXPECT_TRUE((is_hashable<float Foo::*>::value));
+  EXPECT_TRUE((is_hashable<double (Foo::*)(int, int)&&>::value));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
+      std::make_tuple(&Foo::a, &Foo::b, static_cast<int Foo::*>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
+      std::make_tuple(&Foo::c, &Foo::d, static_cast<const int Foo::*>(nullptr),
+                      &Foo::a, &Foo::b)));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
+      &Foo::f1, static_cast<void (Foo::*)()>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
+      &Foo::f2, static_cast<void (Foo::*)() const>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
+      &Foo::g1, &Foo::h1, static_cast<int (Foo::*)() &>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
+      &Foo::g2, &Foo::h2, static_cast<int (Foo::*)() const &>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
+      &Foo::g3, &Foo::h3, static_cast<int (Foo::*)() &&>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
+      &Foo::g4, &Foo::h4, static_cast<int (Foo::*)() const &&>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
+      std::make_tuple(static_cast<void (Foo::*)()>(&Foo::vfa),
+                      static_cast<void (Foo::*)()>(&Foo::vfb),
+                      static_cast<void (Foo::*)()>(nullptr))));
+
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
+      std::make_tuple(static_cast<void (Foo::*)()>(Foo::A::pq()),
+                      static_cast<void (Foo::*)()>(Foo::B::pq()),
+                      static_cast<void (Foo::*)()>(nullptr))));
+}
+
 TEST(HashValueTest, PairAndTuple) {
   EXPECT_TRUE((is_hashable<std::pair<int, int>>::value));
   EXPECT_TRUE((is_hashable<std::pair<const int&, const int&>>::value));
@@ -381,6 +520,52 @@ TEST(HashValueTest, StdBitset) {
        std::bitset<kNumBits>(bit_strings[5].c_str())}));
 }  // namespace
 
+// Dummy type with unordered equality and hashing semantics.  This preserves
+// input order internally, and is used below to ensure we get test coverage
+// for equal sequences with different iteraton orders.
+template <typename T>
+class UnorderedSequence {
+ public:
+  UnorderedSequence() = default;
+  template <typename TT>
+  UnorderedSequence(std::initializer_list<TT> l)
+      : values_(l.begin(), l.end()) {}
+  template <typename ForwardIterator,
+            typename std::enable_if<!std::is_integral<ForwardIterator>::value,
+                                    bool>::type = true>
+  UnorderedSequence(ForwardIterator begin, ForwardIterator end)
+      : values_(begin, end) {}
+  // one-argument constructor of value type T, to appease older toolchains that
+  // get confused by one-element initializer lists in some contexts
+  explicit UnorderedSequence(const T& v) : values_(&v, &v + 1) {}
+
+  using value_type = T;
+
+  size_t size() const { return values_.size(); }
+  typename std::vector<T>::const_iterator begin() const {
+    return values_.begin();
+  }
+  typename std::vector<T>::const_iterator end() const { return values_.end(); }
+
+  friend bool operator==(const UnorderedSequence& lhs,
+                         const UnorderedSequence& rhs) {
+    return lhs.size() == rhs.size() &&
+           std::is_permutation(lhs.begin(), lhs.end(), rhs.begin());
+  }
+  friend bool operator!=(const UnorderedSequence& lhs,
+                         const UnorderedSequence& rhs) {
+    return !(lhs == rhs);
+  }
+  template <typename H>
+  friend H AbslHashValue(H h, const UnorderedSequence& u) {
+    return H::combine(H::combine_unordered(std::move(h), u.begin(), u.end()),
+                      u.size());
+  }
+
+ private:
+  std::vector<T> values_;
+};
+
 template <typename T>
 class HashValueSequenceTest : public testing::Test {
 };
@@ -389,22 +574,66 @@ TYPED_TEST_SUITE_P(HashValueSequenceTest);
 TYPED_TEST_P(HashValueSequenceTest, BasicUsage) {
   EXPECT_TRUE((is_hashable<TypeParam>::value));
 
-  using ValueType = typename TypeParam::value_type;
-  auto a = static_cast<ValueType>(0);
-  auto b = static_cast<ValueType>(23);
-  auto c = static_cast<ValueType>(42);
+  using IntType = typename TypeParam::value_type;
+  auto a = static_cast<IntType>(0);
+  auto b = static_cast<IntType>(23);
+  auto c = static_cast<IntType>(42);
+
+  std::vector<TypeParam> exemplars = {
+      TypeParam(),        TypeParam(),        TypeParam{a, b, c},
+      TypeParam{a, c, b}, TypeParam{c, a, b}, TypeParam{a},
+      TypeParam{a, a},    TypeParam{a, a, a}, TypeParam{a, a, b},
+      TypeParam{a, b, a}, TypeParam{b, a, a}, TypeParam{a, b},
+      TypeParam{b, c}};
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(exemplars));
+}
 
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(TypeParam(), TypeParam{}, TypeParam{a, b, c},
-                      TypeParam{a, b}, TypeParam{b, c})));
+REGISTER_TYPED_TEST_SUITE_P(HashValueSequenceTest, BasicUsage);
+using IntSequenceTypes = testing::Types<
+    std::deque<int>, std::forward_list<int>, std::list<int>, std::vector<int>,
+    std::vector<bool>, TypeErasedContainer<std::vector<int>>, std::set<int>,
+    std::multiset<int>, UnorderedSequence<int>,
+    TypeErasedContainer<UnorderedSequence<int>>, std::unordered_set<int>,
+    std::unordered_multiset<int>, absl::flat_hash_set<int>,
+    absl::node_hash_set<int>, absl::btree_set<int>>;
+INSTANTIATE_TYPED_TEST_SUITE_P(My, HashValueSequenceTest, IntSequenceTypes);
+
+template <typename T>
+class HashValueNestedSequenceTest : public testing::Test {};
+TYPED_TEST_SUITE_P(HashValueNestedSequenceTest);
+
+TYPED_TEST_P(HashValueNestedSequenceTest, BasicUsage) {
+  using T = TypeParam;
+  using V = typename T::value_type;
+  std::vector<T> exemplars = {
+      // empty case
+      T{},
+      // sets of empty sets
+      T{V{}}, T{V{}, V{}}, T{V{}, V{}, V{}},
+      // multisets of different values
+      T{V{1}}, T{V{1, 1}, V{1, 1}}, T{V{1, 1, 1}, V{1, 1, 1}, V{1, 1, 1}},
+      // various orderings of same nested sets
+      T{V{}, V{1, 2}}, T{V{}, V{2, 1}}, T{V{1, 2}, V{}}, T{V{2, 1}, V{}},
+      // various orderings of various nested sets, case 2
+      T{V{1, 2}, V{3, 4}}, T{V{1, 2}, V{4, 3}}, T{V{1, 3}, V{2, 4}},
+      T{V{1, 3}, V{4, 2}}, T{V{1, 4}, V{2, 3}}, T{V{1, 4}, V{3, 2}},
+      T{V{2, 3}, V{1, 4}}, T{V{2, 3}, V{4, 1}}, T{V{2, 4}, V{1, 3}},
+      T{V{2, 4}, V{3, 1}}, T{V{3, 4}, V{1, 2}}, T{V{3, 4}, V{2, 1}}};
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(exemplars));
 }
 
-REGISTER_TYPED_TEST_CASE_P(HashValueSequenceTest, BasicUsage);
-using IntSequenceTypes =
-    testing::Types<std::deque<int>, std::forward_list<int>, std::list<int>,
-                   std::vector<int>, std::vector<bool>, std::set<int>,
-                   std::multiset<int>>;
-INSTANTIATE_TYPED_TEST_CASE_P(My, HashValueSequenceTest, IntSequenceTypes);
+REGISTER_TYPED_TEST_SUITE_P(HashValueNestedSequenceTest, BasicUsage);
+template <typename T>
+using TypeErasedSet = TypeErasedContainer<UnorderedSequence<T>>;
+
+using NestedIntSequenceTypes = testing::Types<
+    std::vector<std::vector<int>>, std::vector<UnorderedSequence<int>>,
+    std::vector<TypeErasedSet<int>>, UnorderedSequence<std::vector<int>>,
+    UnorderedSequence<UnorderedSequence<int>>,
+    UnorderedSequence<TypeErasedSet<int>>, TypeErasedSet<std::vector<int>>,
+    TypeErasedSet<UnorderedSequence<int>>, TypeErasedSet<TypeErasedSet<int>>>;
+INSTANTIATE_TYPED_TEST_SUITE_P(My, HashValueNestedSequenceTest,
+                              NestedIntSequenceTypes);
 
 // Private type that only supports AbslHashValue to make sure our chosen hash
 // implementation is recursive within absl::Hash.
@@ -508,10 +737,10 @@ TEST(HashValueTest, CombinePiecewiseBuffer) {
   //
   // This test is run on a buffer that is a multiple of the stride size, and one
   // that isn't.
-  for (size_t big_buffer_size : {1024 * 2 + 512, 1024 * 3}) {
+  for (size_t big_buffer_size : {1024u * 2 + 512u, 1024u * 3}) {
     SCOPED_TRACE(big_buffer_size);
     std::string big_buffer;
-    for (int i = 0; i < big_buffer_size; ++i) {
+    for (size_t i = 0; i < big_buffer_size; ++i) {
       // Arbitrary string
       big_buffer.push_back(32 + (i * (i / 3)) % 64);
     }
@@ -564,23 +793,64 @@ TEST(HashValueTest, Variant) {
 #endif
 }
 
-TEST(HashValueTest, Maps) {
-  EXPECT_TRUE((is_hashable<std::map<int, std::string>>::value));
+template <typename T>
+class HashValueAssociativeMapTest : public testing::Test {};
+TYPED_TEST_SUITE_P(HashValueAssociativeMapTest);
+
+TYPED_TEST_P(HashValueAssociativeMapTest, BasicUsage) {
+  using M = TypeParam;
+  using V = typename M::value_type;
+  std::vector<M> exemplars{M{},
+                           M{V{0, "foo"}},
+                           M{V{1, "foo"}},
+                           M{V{0, "bar"}},
+                           M{V{1, "bar"}},
+                           M{V{0, "foo"}, V{42, "bar"}},
+                           M{V{42, "bar"}, V{0, "foo"}},
+                           M{V{1, "foo"}, V{42, "bar"}},
+                           M{V{1, "foo"}, V{43, "bar"}},
+                           M{V{1, "foo"}, V{43, "baz"}}};
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(exemplars));
+}
 
-  using M = std::map<int, std::string>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      M{}, M{{0, "foo"}}, M{{1, "foo"}}, M{{0, "bar"}}, M{{1, "bar"}},
-      M{{0, "foo"}, {42, "bar"}}, M{{1, "foo"}, {42, "bar"}},
-      M{{1, "foo"}, {43, "bar"}}, M{{1, "foo"}, {43, "baz"}})));
+REGISTER_TYPED_TEST_SUITE_P(HashValueAssociativeMapTest, BasicUsage);
+using AssociativeMapTypes = testing::Types<
+    std::map<int, std::string>, std::unordered_map<int, std::string>,
+    absl::flat_hash_map<int, std::string>,
+    absl::node_hash_map<int, std::string>, absl::btree_map<int, std::string>,
+    UnorderedSequence<std::pair<const int, std::string>>>;
+INSTANTIATE_TYPED_TEST_SUITE_P(My, HashValueAssociativeMapTest,
+                              AssociativeMapTypes);
 
-  using MM = std::multimap<int, std::string>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      MM{}, MM{{0, "foo"}}, MM{{1, "foo"}}, MM{{0, "bar"}}, MM{{1, "bar"}},
-      MM{{0, "foo"}, {0, "bar"}}, MM{{0, "bar"}, {0, "foo"}},
-      MM{{0, "foo"}, {42, "bar"}}, MM{{1, "foo"}, {42, "bar"}},
-      MM{{1, "foo"}, {1, "foo"}, {43, "bar"}}, MM{{1, "foo"}, {43, "baz"}})));
+template <typename T>
+class HashValueAssociativeMultimapTest : public testing::Test {};
+TYPED_TEST_SUITE_P(HashValueAssociativeMultimapTest);
+
+TYPED_TEST_P(HashValueAssociativeMultimapTest, BasicUsage) {
+  using MM = TypeParam;
+  using V = typename MM::value_type;
+  std::vector<MM> exemplars{MM{},
+                            MM{V{0, "foo"}},
+                            MM{V{1, "foo"}},
+                            MM{V{0, "bar"}},
+                            MM{V{1, "bar"}},
+                            MM{V{0, "foo"}, V{0, "bar"}},
+                            MM{V{0, "bar"}, V{0, "foo"}},
+                            MM{V{0, "foo"}, V{42, "bar"}},
+                            MM{V{1, "foo"}, V{42, "bar"}},
+                            MM{V{1, "foo"}, V{1, "foo"}, V{43, "bar"}},
+                            MM{V{1, "foo"}, V{43, "bar"}, V{1, "foo"}},
+                            MM{V{1, "foo"}, V{43, "baz"}}};
+  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(exemplars));
 }
 
+REGISTER_TYPED_TEST_SUITE_P(HashValueAssociativeMultimapTest, BasicUsage);
+using AssociativeMultimapTypes =
+    testing::Types<std::multimap<int, std::string>,
+                   std::unordered_multimap<int, std::string>>;
+INSTANTIATE_TYPED_TEST_SUITE_P(My, HashValueAssociativeMultimapTest,
+                              AssociativeMultimapTypes);
+
 TEST(HashValueTest, ReferenceWrapper) {
   EXPECT_TRUE(is_hashable<std::reference_wrapper<Private>>::value);
 
@@ -818,10 +1088,10 @@ TYPED_TEST_P(HashIntTest, BasicUsage) {
             Hash<CombineVariadic<TypeParam>>()({}));
 }
 
-REGISTER_TYPED_TEST_CASE_P(HashIntTest, BasicUsage);
+REGISTER_TYPED_TEST_SUITE_P(HashIntTest, BasicUsage);
 using IntTypes = testing::Types<unsigned char, char, int, int32_t, int64_t,
                                 uint32_t, uint64_t, size_t>;
-INSTANTIATE_TYPED_TEST_CASE_P(My, HashIntTest, IntTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(My, HashIntTest, IntTypes);
 
 struct StructWithPadding {
   char c;
@@ -865,10 +1135,10 @@ TEST(HashTest, HashNonUniquelyRepresentedType) {
   unsigned char buffer2[kNumStructs * sizeof(StructWithPadding)];
   std::memset(buffer2, 255, sizeof(buffer2));
   auto* s2 = reinterpret_cast<StructWithPadding*>(buffer2);
-  for (int i = 0; i < kNumStructs; ++i) {
+  for (size_t i = 0; i < kNumStructs; ++i) {
     SCOPED_TRACE(i);
-    s1[i].c = s2[i].c = '0' + i;
-    s1[i].i = s2[i].i = i;
+    s1[i].c = s2[i].c = static_cast<char>('0' + i);
+    s1[i].i = s2[i].i = static_cast<int>(i);
     ASSERT_FALSE(memcmp(buffer1 + i * sizeof(StructWithPadding),
                         buffer2 + i * sizeof(StructWithPadding),
                         sizeof(StructWithPadding)) == 0)
@@ -928,29 +1198,23 @@ TEST(HashTest, SmallValueOn64ByteBoundary) {
   Hash<IntAndString>()(IntAndString{0, std::string(63, '0')});
 }
 
-struct TypeErased {
-  size_t n;
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, const TypeErased& v) {
-    v.HashValue(absl::HashState::Create(&hash_state));
-    return hash_state;
-  }
-
-  void HashValue(absl::HashState state) const {
-    absl::HashState::combine(std::move(state), n);
-  }
-};
-
 TEST(HashTest, TypeErased) {
-  EXPECT_TRUE((is_hashable<TypeErased>::value));
-  EXPECT_TRUE((is_hashable<std::pair<TypeErased, int>>::value));
+  EXPECT_TRUE((is_hashable<TypeErasedValue<size_t>>::value));
+  EXPECT_TRUE((is_hashable<std::pair<TypeErasedValue<size_t>, int>>::value));
 
-  EXPECT_EQ(SpyHash(TypeErased{7}), SpyHash(size_t{7}));
-  EXPECT_NE(SpyHash(TypeErased{7}), SpyHash(size_t{13}));
+  EXPECT_EQ(SpyHash(TypeErasedValue<size_t>(7)), SpyHash(size_t{7}));
+  EXPECT_NE(SpyHash(TypeErasedValue<size_t>(7)), SpyHash(size_t{13}));
 
-  EXPECT_EQ(SpyHash(std::make_pair(TypeErased{7}, 17)),
+  EXPECT_EQ(SpyHash(std::make_pair(TypeErasedValue<size_t>(7), 17)),
             SpyHash(std::make_pair(size_t{7}, 17)));
+
+  absl::flat_hash_set<absl::flat_hash_set<int>> ss = {{1, 2}, {3, 4}};
+  TypeErasedContainer<absl::flat_hash_set<absl::flat_hash_set<int>>> es = {
+      absl::flat_hash_set<int>{1, 2}, {3, 4}};
+  absl::flat_hash_set<TypeErasedContainer<absl::flat_hash_set<int>>> se = {
+      {1, 2}, {3, 4}};
+  EXPECT_EQ(SpyHash(ss), SpyHash(es));
+  EXPECT_EQ(SpyHash(ss), SpyHash(se));
 }
 
 struct ValueWithBoolConversion {
@@ -962,7 +1226,9 @@ struct ValueWithBoolConversion {
 namespace std {
 template <>
 struct hash<ValueWithBoolConversion> {
-  size_t operator()(ValueWithBoolConversion v) { return v.i; }
+  size_t operator()(ValueWithBoolConversion v) {
+    return static_cast<size_t>(v.i);
+  }
 };
 }  // namespace std
 
diff --git a/third_party/abseil-cpp/absl/hash/internal/city.cc b/third_party/abseil-cpp/absl/hash/internal/city.cc
index 5460134e57..f0d3196470 100644
--- a/third_party/abseil-cpp/absl/hash/internal/city.cc
+++ b/third_party/abseil-cpp/absl/hash/internal/city.cc
@@ -97,7 +97,7 @@ static uint32_t Hash32Len13to24(const char *s, size_t len) {
   uint32_t d = Fetch32(s + (len >> 1));
   uint32_t e = Fetch32(s);
   uint32_t f = Fetch32(s + len - 4);
-  uint32_t h = len;
+  uint32_t h = static_cast<uint32_t>(len);
 
   return fmix(Mur(f, Mur(e, Mur(d, Mur(c, Mur(b, Mur(a, h)))))));
 }
@@ -106,15 +106,15 @@ static uint32_t Hash32Len0to4(const char *s, size_t len) {
   uint32_t b = 0;
   uint32_t c = 9;
   for (size_t i = 0; i < len; i++) {
-    signed char v = s[i];
-    b = b * c1 + v;
+    signed char v = static_cast<signed char>(s[i]);
+    b = b * c1 + static_cast<uint32_t>(v);
     c ^= b;
   }
-  return fmix(Mur(b, Mur(len, c)));
+  return fmix(Mur(b, Mur(static_cast<uint32_t>(len), c)));
 }
 
 static uint32_t Hash32Len5to12(const char *s, size_t len) {
-  uint32_t a = len, b = len * 5, c = 9, d = b;
+  uint32_t a = static_cast<uint32_t>(len), b = a * 5, c = 9, d = b;
   a += Fetch32(s);
   b += Fetch32(s + len - 4);
   c += Fetch32(s + ((len >> 1) & 4));
@@ -129,7 +129,7 @@ uint32_t CityHash32(const char *s, size_t len) {
   }
 
   // len > 24
-  uint32_t h = len, g = c1 * len, f = g;
+  uint32_t h = static_cast<uint32_t>(len), g = c1 * h, f = g;
 
   uint32_t a0 = Rotate32(Fetch32(s + len - 4) * c1, 17) * c2;
   uint32_t a1 = Rotate32(Fetch32(s + len - 8) * c1, 17) * c2;
@@ -230,11 +230,11 @@ static uint64_t HashLen0to16(const char *s, size_t len) {
     return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
   }
   if (len > 0) {
-    uint8_t a = s[0];
-    uint8_t b = s[len >> 1];
-    uint8_t c = s[len - 1];
+    uint8_t a = static_cast<uint8_t>(s[0]);
+    uint8_t b = static_cast<uint8_t>(s[len >> 1]);
+    uint8_t c = static_cast<uint8_t>(s[len - 1]);
     uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
-    uint32_t z = len + (static_cast<uint32_t>(c) << 2);
+    uint32_t z = static_cast<uint32_t>(len) + (static_cast<uint32_t>(c) << 2);
     return ShiftMix(y * k2 ^ z * k0) * k2;
   }
   return k2;
diff --git a/third_party/abseil-cpp/absl/hash/internal/city_test.cc b/third_party/abseil-cpp/absl/hash/internal/city_test.cc
index 251d381d73..1bbf02e0d1 100644
--- a/third_party/abseil-cpp/absl/hash/internal/city_test.cc
+++ b/third_party/abseil-cpp/absl/hash/internal/city_test.cc
@@ -22,6 +22,7 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace hash_internal {
+namespace {
 
 static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
 static const uint64_t kSeed0 = 1234567;
@@ -590,6 +591,7 @@ TEST(CityHashTest, Unchanging) {
   TestUnchanging(testdata[i], 0, kDataSize);
 }
 
+}  // namespace
 }  // namespace hash_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/hash/internal/hash.h b/third_party/abseil-cpp/absl/hash/internal/hash.h
index b1e33caf4c..dbdc20504f 100644
--- a/third_party/abseil-cpp/absl/hash/internal/hash.h
+++ b/third_party/abseil-cpp/absl/hash/internal/hash.h
@@ -23,6 +23,7 @@
 #include <array>
 #include <bitset>
 #include <cmath>
+#include <cstddef>
 #include <cstring>
 #include <deque>
 #include <forward_list>
@@ -36,6 +37,8 @@
 #include <string>
 #include <tuple>
 #include <type_traits>
+#include <unordered_map>
+#include <unordered_set>
 #include <utility>
 #include <vector>
 
@@ -54,6 +57,9 @@
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
+
+class HashState;
+
 namespace hash_internal {
 
 // Internal detail: Large buffers are hashed in smaller chunks.  This function
@@ -115,24 +121,66 @@ class PiecewiseCombiner {
   size_t position_;
 };
 
+// is_hashable()
+//
+// Trait class which returns true if T is hashable by the absl::Hash framework.
+// Used for the AbslHashValue implementations for composite types below.
+template <typename T>
+struct is_hashable;
+
 // HashStateBase
 //
-// A hash state object represents an intermediate state in the computation
-// of an unspecified hash algorithm. `HashStateBase` provides a CRTP style
-// base class for hash state implementations. Developers adding type support
-// for `absl::Hash` should not rely on any parts of the state object other than
-// the following member functions:
+// An internal implementation detail that contains common implementation details
+// for all of the "hash state objects" objects generated by Abseil.  This is not
+// a public API; users should not create classes that inherit from this.
+//
+// A hash state object is the template argument `H` passed to `AbslHashValue`.
+// It represents an intermediate state in the computation of an unspecified hash
+// algorithm. `HashStateBase` provides a CRTP style base class for hash state
+// implementations. Developers adding type support for `absl::Hash` should not
+// rely on any parts of the state object other than the following member
+// functions:
 //
 //   * HashStateBase::combine()
 //   * HashStateBase::combine_contiguous()
+//   * HashStateBase::combine_unordered()
 //
-// A derived hash state class of type `H` must provide a static member function
+// A derived hash state class of type `H` must provide a public member function
 // with a signature similar to the following:
 //
 //    `static H combine_contiguous(H state, const unsigned char*, size_t)`.
 //
+// It must also provide a private template method named RunCombineUnordered.
+//
+// A "consumer" is a 1-arg functor returning void.  Its argument is a reference
+// to an inner hash state object, and it may be called multiple times.  When
+// called, the functor consumes the entropy from the provided state object,
+// and resets that object to its empty state.
+//
+// A "combiner" is a stateless 2-arg functor returning void.  Its arguments are
+// an inner hash state object and an ElementStateConsumer functor.  A combiner
+// uses the provided inner hash state object to hash each element of the
+// container, passing the inner hash state object to the consumer after hashing
+// each element.
+//
+// Given these definitions, a derived hash state class of type H
+// must provide a private template method with a signature similar to the
+// following:
+//
+//    `template <typename CombinerT>`
+//    `static H RunCombineUnordered(H outer_state, CombinerT combiner)`
+//
+// This function is responsible for constructing the inner state object and
+// providing a consumer to the combiner.  It uses side effects of the consumer
+// and combiner to mix the state of each element in an order-independent manner,
+// and uses this to return an updated value of `outer_state`.
+//
+// This inside-out approach generates efficient object code in the normal case,
+// but allows us to use stack storage to implement the absl::HashState type
+// erasure mechanism (avoiding heap allocations while hashing).
+//
 // `HashStateBase` will provide a complete implementation for a hash state
-// object in terms of this method.
+// object in terms of these two methods.
 //
 // Example:
 //
@@ -141,6 +189,10 @@ class PiecewiseCombiner {
 //       static H combine_contiguous(H state, const unsigned char*, size_t);
 //       using MyHashState::HashStateBase::combine;
 //       using MyHashState::HashStateBase::combine_contiguous;
+//       using MyHashState::HashStateBase::combine_unordered;
+//     private:
+//       template <typename CombinerT>
+//       static H RunCombineUnordered(H state, CombinerT combiner);
 //   };
 template <typename H>
 class HashStateBase {
@@ -181,7 +233,30 @@ class HashStateBase {
   template <typename T>
   static H combine_contiguous(H state, const T* data, size_t size);
 
+  template <typename I>
+  static H combine_unordered(H state, I begin, I end);
+
   using AbslInternalPiecewiseCombiner = PiecewiseCombiner;
+
+  template <typename T>
+  using is_hashable = absl::hash_internal::is_hashable<T>;
+
+ private:
+  // Common implementation of the iteration step of a "combiner", as described
+  // above.
+  template <typename I>
+  struct CombineUnorderedCallback {
+    I begin;
+    I end;
+
+    template <typename InnerH, typename ElementStateConsumer>
+    void operator()(InnerH inner_state, ElementStateConsumer cb) {
+      for (; begin != end; ++begin) {
+        inner_state = H::combine(std::move(inner_state), *begin);
+        cb(inner_state);
+      }
+    }
+  };
 };
 
 // is_uniquely_represented
@@ -346,17 +421,43 @@ H AbslHashValue(H hash_state, std::nullptr_t) {
   return H::combine(std::move(hash_state), static_cast<void*>(nullptr));
 }
 
+// AbslHashValue() for hashing pointers-to-member
+template <typename H, typename T, typename C>
+H AbslHashValue(H hash_state, T C::* ptr) {
+  auto salient_ptm_size = [](std::size_t n) -> std::size_t {
+#if defined(_MSC_VER)
+    // Pointers-to-member-function on MSVC consist of one pointer plus 0, 1, 2,
+    // or 3 ints. In 64-bit mode, they are 8-byte aligned and thus can contain
+    // padding (namely when they have 1 or 3 ints). The value below is a lower
+    // bound on the number of salient, non-padding bytes that we use for
+    // hashing.
+    if (alignof(T C::*) == alignof(int)) {
+      // No padding when all subobjects have the same size as the total
+      // alignment. This happens in 32-bit mode.
+      return n;
+    } else {
+      // Padding for 1 int (size 16) or 3 ints (size 24).
+      // With 2 ints, the size is 16 with no padding, which we pessimize.
+      return n == 24 ? 20 : n == 16 ? 12 : n;
+    }
+#else
+    // On other platforms, we assume that pointers-to-members do not have
+    // padding.
+#ifdef __cpp_lib_has_unique_object_representations
+    static_assert(std::has_unique_object_representations<T C::*>::value);
+#endif  // __cpp_lib_has_unique_object_representations
+    return n;
+#endif
+  };
+  return H::combine_contiguous(std::move(hash_state),
+                               reinterpret_cast<unsigned char*>(&ptr),
+                               salient_ptm_size(sizeof ptr));
+}
+
 // -----------------------------------------------------------------------------
 // AbslHashValue for Composite Types
 // -----------------------------------------------------------------------------
 
-// is_hashable()
-//
-// Trait class which returns true if T is hashable by the absl::Hash framework.
-// Used for the AbslHashValue implementations for composite types below.
-template <typename T>
-struct is_hashable;
-
 // AbslHashValue() for hashing pairs
 template <typename H, typename T1, typename T2>
 typename std::enable_if<is_hashable<T1>::value && is_hashable<T2>::value,
@@ -502,10 +603,11 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
                     vector.size());
 }
 
+// AbslHashValue special cases for hashing std::vector<bool>
+
 #if defined(ABSL_IS_BIG_ENDIAN) && \
     (defined(__GLIBCXX__) || defined(__GLIBCPP__))
-// AbslHashValue for hashing std::vector<bool>
-//
+
 // std::hash in libstdc++ does not work correctly with vector<bool> on Big
 // Endian platforms therefore we need to implement a custom AbslHashValue for
 // it. More details on the bug:
@@ -521,6 +623,22 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
   }
   return H::combine(combiner.finalize(std::move(hash_state)), vector.size());
 }
+#else
+// When not working around the libstdc++ bug above, we still have to contend
+// with the fact that std::hash<vector<bool>> is often poor quality, hashing
+// directly on the internal words and on no other state.  On these platforms,
+// vector<bool>{1, 1} and vector<bool>{1, 1, 0} hash to the same value.
+//
+// Mixing in the size (as we do in our other vector<> implementations) on top
+// of the library-provided hash implementation avoids this QOI issue.
+template <typename H, typename T, typename Allocator>
+typename std::enable_if<is_hashable<T>::value && std::is_same<T, bool>::value,
+                        H>::type
+AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
+  return H::combine(std::move(hash_state),
+                    std::hash<std::vector<T, Allocator>>{}(vector),
+                    vector.size());
+}
 #endif
 
 // -----------------------------------------------------------------------------
@@ -573,6 +691,55 @@ typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
 }
 
 // -----------------------------------------------------------------------------
+// AbslHashValue for Unordered Associative Containers
+// -----------------------------------------------------------------------------
+
+// AbslHashValue for hashing std::unordered_set
+template <typename H, typename Key, typename Hash, typename KeyEqual,
+          typename Alloc>
+typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
+    H hash_state, const std::unordered_set<Key, Hash, KeyEqual, Alloc>& s) {
+  return H::combine(
+      H::combine_unordered(std::move(hash_state), s.begin(), s.end()),
+      s.size());
+}
+
+// AbslHashValue for hashing std::unordered_multiset
+template <typename H, typename Key, typename Hash, typename KeyEqual,
+          typename Alloc>
+typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
+    H hash_state,
+    const std::unordered_multiset<Key, Hash, KeyEqual, Alloc>& s) {
+  return H::combine(
+      H::combine_unordered(std::move(hash_state), s.begin(), s.end()),
+      s.size());
+}
+
+// AbslHashValue for hashing std::unordered_set
+template <typename H, typename Key, typename T, typename Hash,
+          typename KeyEqual, typename Alloc>
+typename std::enable_if<is_hashable<Key>::value && is_hashable<T>::value,
+                        H>::type
+AbslHashValue(H hash_state,
+              const std::unordered_map<Key, T, Hash, KeyEqual, Alloc>& s) {
+  return H::combine(
+      H::combine_unordered(std::move(hash_state), s.begin(), s.end()),
+      s.size());
+}
+
+// AbslHashValue for hashing std::unordered_multiset
+template <typename H, typename Key, typename T, typename Hash,
+          typename KeyEqual, typename Alloc>
+typename std::enable_if<is_hashable<Key>::value && is_hashable<T>::value,
+                        H>::type
+AbslHashValue(H hash_state,
+              const std::unordered_multimap<Key, T, Hash, KeyEqual, Alloc>& s) {
+  return H::combine(
+      H::combine_unordered(std::move(hash_state), s.begin(), s.end()),
+      s.size());
+}
+
+// -----------------------------------------------------------------------------
 // AbslHashValue for Wrapper Types
 // -----------------------------------------------------------------------------
 
@@ -815,6 +982,31 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
   // move-only ensures that there is only one non-moved-from object.
   MixingHashState() : state_(Seed()) {}
 
+  friend class MixingHashState::HashStateBase;
+
+  template <typename CombinerT>
+  static MixingHashState RunCombineUnordered(MixingHashState state,
+                                             CombinerT combiner) {
+    uint64_t unordered_state = 0;
+    combiner(MixingHashState{}, [&](MixingHashState& inner_state) {
+      // Add the hash state of the element to the running total, but mix the
+      // carry bit back into the low bit.  This in intended to avoid losing
+      // entropy to overflow, especially when unordered_multisets contain
+      // multiple copies of the same value.
+      auto element_state = inner_state.state_;
+      unordered_state += element_state;
+      if (unordered_state < element_state) {
+        ++unordered_state;
+      }
+      inner_state = MixingHashState{};
+    });
+    return MixingHashState::combine(std::move(state), unordered_state);
+  }
+
+  // Allow the HashState type-erasure implementation to invoke
+  // RunCombinedUnordered() directly.
+  friend class absl::HashState;
+
   // Workaround for MSVC bug.
   // We make the type copyable to fix the calling convention, even though we
   // never actually copy it. Keep it private to not affect the public API of the
@@ -898,15 +1090,10 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
   }
 
   ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Mix(uint64_t state, uint64_t v) {
-#if defined(__aarch64__)
-    // On AArch64, calculating a 128-bit product is inefficient, because it
-    // requires a sequence of two instructions to calculate the upper and lower
-    // halves of the result.
-    using MultType = uint64_t;
-#else
+    // Though the 128-bit product on AArch64 needs two instructions, it is
+    // still a good balance between speed and hash quality.
     using MultType =
         absl::conditional_t<sizeof(size_t) == 4, uint64_t, uint128>;
-#endif
     // We do the addition in 64-bit space to make sure the 128-bit
     // multiplication is fast. If we were to do it as MultType the compiler has
     // to assume that the high word is non-zero and needs to perform 2
@@ -1049,6 +1236,14 @@ H HashStateBase<H>::combine_contiguous(H state, const T* data, size_t size) {
   return hash_internal::hash_range_or_bytes(std::move(state), data, size);
 }
 
+// HashStateBase::combine_unordered()
+template <typename H>
+template <typename I>
+H HashStateBase<H>::combine_unordered(H state, I begin, I end) {
+  return H::RunCombineUnordered(std::move(state),
+                                CombineUnorderedCallback<I>{begin, end});
+}
+
 // HashStateBase::PiecewiseCombiner::add_buffer()
 template <typename H>
 H PiecewiseCombiner::add_buffer(H state, const unsigned char* data,
diff --git a/third_party/abseil-cpp/absl/hash/internal/low_level_hash.cc b/third_party/abseil-cpp/absl/hash/internal/low_level_hash.cc
index 6f9cb9c7bf..e05e7885ad 100644
--- a/third_party/abseil-cpp/absl/hash/internal/low_level_hash.cc
+++ b/third_party/abseil-cpp/absl/hash/internal/low_level_hash.cc
@@ -40,7 +40,7 @@ static uint64_t Mix(uint64_t v0, uint64_t v1) {
 }
 
 uint64_t LowLevelHash(const void* data, size_t len, uint64_t seed,
-                      const uint64_t salt[]) {
+                      const uint64_t salt[5]) {
   const uint8_t* ptr = static_cast<const uint8_t*>(data);
   uint64_t starting_length = static_cast<uint64_t>(len);
   uint64_t current_state = seed ^ salt[0];
@@ -106,7 +106,8 @@ uint64_t LowLevelHash(const void* data, size_t len, uint64_t seed,
   } else if (len > 0) {
     // If we have at least 1 and at most 3 bytes, read all of the provided
     // bits into A, with some adjustments.
-    a = ((ptr[0] << 16) | (ptr[len >> 1] << 8) | ptr[len - 1]);
+    a = static_cast<uint64_t>((ptr[0] << 16) | (ptr[len >> 1] << 8) |
+                              ptr[len - 1]);
     b = 0;
   } else {
     a = 0;
diff --git a/third_party/abseil-cpp/absl/hash/internal/spy_hash_state.h b/third_party/abseil-cpp/absl/hash/internal/spy_hash_state.h
index c083120811..0972826621 100644
--- a/third_party/abseil-cpp/absl/hash/internal/spy_hash_state.h
+++ b/third_party/abseil-cpp/absl/hash/internal/spy_hash_state.h
@@ -15,6 +15,7 @@
 #ifndef ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
 #define ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
 
+#include <algorithm>
 #include <ostream>
 #include <string>
 #include <vector>
@@ -167,6 +168,24 @@ class SpyHashStateImpl : public HashStateBase<SpyHashStateImpl<T>> {
 
   using SpyHashStateImpl::HashStateBase::combine_contiguous;
 
+  template <typename CombinerT>
+  static SpyHashStateImpl RunCombineUnordered(SpyHashStateImpl state,
+                                              CombinerT combiner) {
+    UnorderedCombinerCallback cb;
+
+    combiner(SpyHashStateImpl<void>{}, std::ref(cb));
+
+    std::sort(cb.element_hash_representations.begin(),
+              cb.element_hash_representations.end());
+    state.hash_representation_.insert(state.hash_representation_.end(),
+                                      cb.element_hash_representations.begin(),
+                                      cb.element_hash_representations.end());
+    if (cb.error && cb.error->has_value()) {
+      state.error_ = std::move(cb.error);
+    }
+    return state;
+  }
+
   absl::optional<std::string> error() const {
     if (moved_from_) {
       return "Returned a moved-from instance of the hash state object.";
@@ -178,6 +197,22 @@ class SpyHashStateImpl : public HashStateBase<SpyHashStateImpl<T>> {
   template <typename U>
   friend class SpyHashStateImpl;
 
+  struct UnorderedCombinerCallback {
+    std::vector<std::string> element_hash_representations;
+    std::shared_ptr<absl::optional<std::string>> error;
+
+    // The inner spy can have a different type.
+    template <typename U>
+    void operator()(SpyHashStateImpl<U>& inner) {
+      element_hash_representations.push_back(
+          absl::StrJoin(inner.hash_representation_, ""));
+      if (inner.error_->has_value()) {
+        error = std::move(inner.error_);
+      }
+      inner = SpyHashStateImpl<void>{};
+    }
+  };
+
   // This is true if SpyHashStateImpl<T> has been passed to a call of
   // AbslHashValue with the wrong type. This detects that the user called
   // AbslHashValue directly (because the hash state type does not match).
diff --git a/third_party/abseil-cpp/absl/log/BUILD.bazel b/third_party/abseil-cpp/absl/log/BUILD.bazel
new file mode 100644
index 0000000000..dadc8856ca
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/BUILD.bazel
@@ -0,0 +1,481 @@
+#
+# Copyright 2022 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+load(
+    "//absl:copts/configure_copts.bzl",
+    "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
+    "ABSL_TEST_COPTS",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+# Public targets
+cc_library(
+    name = "check",
+    hdrs = ["check.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/base:core_headers",
+        "//absl/log/internal:check_op",
+        "//absl/log/internal:conditions",
+        "//absl/log/internal:log_message",
+        "//absl/log/internal:strip",
+    ],
+)
+
+cc_library(
+    name = "die_if_null",
+    srcs = ["die_if_null.cc"],
+    hdrs = ["die_if_null.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/strings",
+    ],
+)
+
+cc_library(
+    name = "flags",
+    srcs = ["flags.cc"],
+    hdrs = ["flags.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = ["//visibility:public"],
+    deps = [
+        ":globals",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/flags:flag",
+        "//absl/flags:marshalling",
+        "//absl/log/internal:config",
+        "//absl/log/internal:flags",
+        "//absl/strings",
+    ],
+    # Binaries which do not access these flags from C++ still want this library linked in.
+    alwayslink = True,
+)
+
+cc_library(
+    name = "globals",
+    srcs = ["globals.cc"],
+    hdrs = ["globals.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = ["//visibility:public"],
+    deps = [
+        "//absl/base:atomic_hook",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/hash",
+        "//absl/strings",
+    ],
+)
+
+cc_library(
+    name = "initialize",
+    srcs = ["initialize.cc"],
+    hdrs = ["initialize.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = ["//visibility:public"],
+    deps = [
+        ":globals",
+        "//absl/base:config",
+        "//absl/log/internal:globals",
+        "//absl/time",
+    ],
+)
+
+cc_library(
+    name = "log",
+    hdrs = ["log.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/log/internal:conditions",
+        "//absl/log/internal:log_message",
+        "//absl/log/internal:strip",
+    ],
+)
+
+cc_library(
+    name = "log_entry",
+    srcs = ["log_entry.cc"],
+    hdrs = ["log_entry.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/log/internal:config",
+        "//absl/strings",
+        "//absl/time",
+        "//absl/types:span",
+    ],
+)
+
+cc_library(
+    name = "log_sink",
+    srcs = ["log_sink.cc"],
+    hdrs = ["log_sink.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log_entry",
+        "//absl/base:config",
+    ],
+)
+
+cc_library(
+    name = "log_sink_registry",
+    hdrs = ["log_sink_registry.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log_sink",
+        "//absl/base:config",
+        "//absl/log/internal:log_sink_set",
+    ],
+)
+
+cc_library(
+    name = "log_streamer",
+    hdrs = ["log_streamer.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log",
+        "//absl/base:config",
+        "//absl/base:log_severity",
+        "//absl/strings",
+        "//absl/strings:internal",
+        "//absl/types:optional",
+        "//absl/utility",
+    ],
+)
+
+cc_library(
+    name = "scoped_mock_log",
+    testonly = True,
+    srcs = ["scoped_mock_log.cc"],
+    hdrs = ["scoped_mock_log.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log_entry",
+        ":log_sink",
+        ":log_sink_registry",
+        "//absl/base:config",
+        "//absl/base:log_severity",
+        "//absl/base:raw_logging_internal",
+        "//absl/strings",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
+# Test targets
+cc_test(
+    name = "basic_log_test",
+    size = "small",
+    srcs = ["basic_log_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":globals",
+        ":log",
+        ":log_entry",
+        ":scoped_mock_log",
+        "//absl/base",
+        "//absl/base:log_severity",
+        "//absl/log/internal:test_actions",
+        "//absl/log/internal:test_helpers",
+        "//absl/log/internal:test_matchers",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "check_test",
+    size = "small",
+    srcs = ["check_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:ios",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
+    deps = [
+        ":check",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/log/internal:test_helpers",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "die_if_null_test",
+    size = "small",
+    srcs = ["die_if_null_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":die_if_null",
+        "//absl/base:core_headers",
+        "//absl/log/internal:test_helpers",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "flags_test",
+    size = "small",
+    srcs = ["flags_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":flags",
+        ":globals",
+        ":log",
+        ":scoped_mock_log",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/flags:flag",
+        "//absl/flags:reflection",
+        "//absl/log/internal:flags",
+        "//absl/log/internal:test_helpers",
+        "//absl/log/internal:test_matchers",
+        "//absl/strings",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "globals_test",
+    size = "small",
+    srcs = ["globals_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":globals",
+        ":log",
+        ":scoped_mock_log",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/log/internal:globals",
+        "//absl/log/internal:test_helpers",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "log_entry_test",
+    size = "small",
+    srcs = ["log_entry_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log_entry",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/log/internal:format",
+        "//absl/log/internal:test_helpers",
+        "//absl/strings",
+        "//absl/time",
+        "//absl/types:span",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "log_format_test",
+    size = "small",
+    srcs = ["log_format_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log",
+        ":scoped_mock_log",
+        "//absl/log/internal:config",
+        "//absl/log/internal:test_matchers",
+        "//absl/strings",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "log_macro_hygiene_test",
+    size = "small",
+    srcs = ["log_macro_hygiene_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log",
+        ":scoped_mock_log",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "log_sink_test",
+    size = "medium",
+    srcs = ["log_sink_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:ios",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
+    deps = [
+        ":log",
+        ":log_sink",
+        ":log_sink_registry",
+        ":scoped_mock_log",
+        "//absl/base:core_headers",
+        "//absl/base:raw_logging_internal",
+        "//absl/log/internal:test_actions",
+        "//absl/log/internal:test_helpers",
+        "//absl/log/internal:test_matchers",
+        "//absl/strings",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "log_streamer_test",
+    size = "medium",
+    srcs = ["log_streamer_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log",
+        ":log_streamer",
+        ":scoped_mock_log",
+        "//absl/base",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/log/internal:test_actions",
+        "//absl/log/internal:test_helpers",
+        "//absl/log/internal:test_matchers",
+        "//absl/strings",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "log_modifier_methods_test",
+    size = "small",
+    srcs = ["log_modifier_methods_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log",
+        ":log_sink",
+        ":scoped_mock_log",
+        "//absl/log/internal:test_actions",
+        "//absl/log/internal:test_helpers",
+        "//absl/log/internal:test_matchers",
+        "//absl/strings",
+        "//absl/time",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "scoped_mock_log_test",
+    size = "small",
+    srcs = ["scoped_mock_log_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    linkstatic = 1,
+    tags = [
+        "no_test:os:ios",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
+    deps = [
+        ":globals",
+        ":log",
+        ":scoped_mock_log",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/log/internal:test_helpers",
+        "//absl/log/internal:test_matchers",
+        "//absl/memory",
+        "//absl/strings",
+        "//absl/synchronization",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "stripping_test",
+    size = "small",
+    srcs = ["stripping_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    # This test requires all code live in the binary (instead of shared libraries)
+    # because we test for the existence of specific literals in the binary.
+    linkstatic = 1,
+    deps = [
+        ":check",
+        ":log",
+        "//absl/base:strerror",
+        "//absl/flags:program_name",
+        "//absl/log/internal:test_helpers",
+        "//absl/strings",
+        "//absl/strings:str_format",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_binary(
+    name = "log_benchmark",
+    testonly = 1,
+    srcs = ["log_benchmark.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = ["benchmark"],
+    deps = [
+        ":check",
+        ":flags",
+        ":globals",
+        ":log",
+        ":log_entry",
+        ":log_sink",
+        ":log_sink_registry",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/flags:flag",
+        "//absl/log/internal:flags",
+        "@com_github_google_benchmark//:benchmark_main",
+    ],
+)
diff --git a/third_party/abseil-cpp/absl/log/BUILD.gn b/third_party/abseil-cpp/absl/log/BUILD.gn
new file mode 100644
index 0000000000..52115503c5
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/BUILD.gn
@@ -0,0 +1,323 @@
+# Copyright 2022 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("check") {
+  public = [ "check.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/log/internal:check_op",
+    "//third_party/abseil-cpp/absl/log/internal:conditions",
+    "//third_party/abseil-cpp/absl/log/internal:log_message",
+    "//third_party/abseil-cpp/absl/log/internal:strip",
+  ]
+}
+
+absl_source_set("die_if_null") {
+  sources = [ "die_if_null.cc" ]
+  public = [ "die_if_null.h" ]
+  deps = [
+    ":log",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("flags") {
+  sources = [ "flags.cc" ]
+  public = [ "flags.h" ]
+  deps = [
+    ":globals",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/flags:flag",
+    "//third_party/abseil-cpp/absl/flags:marshalling",
+    "//third_party/abseil-cpp/absl/log/internal:config",
+    "//third_party/abseil-cpp/absl/log/internal:flags",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("globals") {
+  sources = [ "globals.cc" ]
+  public = [ "globals.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:atomic_hook",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/hash",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("initialize") {
+  sources = [ "initialize.cc" ]
+  public = [ "initialize.h" ]
+  deps = [
+    ":globals",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/log/internal:globals",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+}
+
+absl_source_set("log") {
+  public = [ "log.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/log/internal:conditions",
+    "//third_party/abseil-cpp/absl/log/internal:log_message",
+    "//third_party/abseil-cpp/absl/log/internal:strip",
+  ]
+}
+
+absl_source_set("log_entry") {
+  sources = [ "log_entry.cc" ]
+  public = [ "log_entry.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log/internal:config",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("log_sink") {
+  sources = [ "log_sink.cc" ]
+  public = [ "log_sink.h" ]
+  deps = [
+    ":log_entry",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("log_sink_registry") {
+  public = [ "log_sink_registry.h" ]
+  deps = [
+    ":log_sink",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/log/internal:log_sink_set",
+  ]
+}
+
+absl_source_set("log_streamer") {
+  public = [ "log_streamer.h" ]
+  deps = [
+    ":log",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:internal",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("scoped_mock_log") {
+  testonly = true
+  sources = [ "scoped_mock_log.cc" ]
+  public = [ "scoped_mock_log.h" ]
+  deps = [
+    ":log_entry",
+    ":log_sink",
+    ":log_sink_registry",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/googletest:gmock",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_test("basic_log_test") {
+  sources = [ "basic_log_test.cc" ]
+  deps = [
+    ":globals",
+    ":log",
+    ":log_entry",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log/internal:test_actions",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+  ]
+}
+
+absl_test("check_test") {
+  sources = [ "check_test.cc" ]
+  if (is_ios) {
+    sources = []
+  }
+  deps = [
+    ":check",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+  ]
+}
+
+absl_test("die_if_null_test") {
+  sources = [ "die_if_null_test.cc" ]
+  deps = [
+    ":die_if_null",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+  ]
+}
+
+absl_test("flags_test") {
+  sources = [ "flags_test.cc" ]
+  deps = [
+    ":flags",
+    ":globals",
+    ":log",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/flags:flag",
+    "//third_party/abseil-cpp/absl/flags:reflection",
+    "//third_party/abseil-cpp/absl/log/internal:flags",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_test("globals_test") {
+  sources = [ "globals_test.cc" ]
+  deps = [
+    ":globals",
+    ":log",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log/internal:globals",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+  ]
+}
+
+absl_test("log_entry_test") {
+  sources = [ "log_entry_test.cc" ]
+  deps = [
+    ":log_entry",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log/internal:format",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_test("log_format_test") {
+  sources = [ "log_format_test.cc" ]
+  deps = [
+    ":log",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/log/internal:config",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_test("log_macro_hygiene_test") {
+  sources = [ "log_macro_hygiene_test.cc" ]
+  deps = [
+    ":log",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+  ]
+}
+
+absl_test("log_sink_test") {
+  sources = [ "log_sink_test.cc" ]
+  if (is_ios) {
+    sources = []
+  }
+  deps = [
+    ":log",
+    ":log_sink",
+    ":log_sink_registry",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/log/internal:test_actions",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_test("log_streamer_test") {
+  sources = [ "log_streamer_test.cc" ]
+  deps = [
+    ":log",
+    ":log_streamer",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log/internal:test_actions",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_test("log_modifier_methods_test") {
+  sources = [ "log_modifier_methods_test.cc" ]
+  deps = [
+    ":log",
+    ":log_sink",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/log/internal:test_actions",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+}
+
+absl_test("scoped_mock_log_test") {
+  sources = [ "scoped_mock_log_test.cc" ]
+  if (is_ios) {
+    sources = []
+  }
+  deps = [
+    ":globals",
+    ":log",
+    ":scoped_mock_log",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/log/internal:test_matchers",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
+
+absl_test("stripping_test") {
+  sources = [ "stripping_test.cc" ]
+  deps = [
+    ":check",
+    ":log",
+    "//third_party/abseil-cpp/absl/base:strerror",
+    "//third_party/abseil-cpp/absl/flags:program_name",
+    "//third_party/abseil-cpp/absl/log/internal:test_helpers",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/log/CMakeLists.txt b/third_party/abseil-cpp/absl/log/CMakeLists.txt
new file mode 100644
index 0000000000..09e4ca0c95
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/CMakeLists.txt
@@ -0,0 +1,839 @@
+#
+# Copyright 2022 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Internal targets
+absl_cc_library(
+  NAME
+    log_internal_check_op
+  SRCS
+    "internal/check_op.cc"
+  HDRS
+    "internal/check_op.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_internal_nullguard
+    absl::log_internal_nullstream
+    absl::log_internal_strip
+    absl::strings
+)
+
+absl_cc_library(
+  NAME
+    log_internal_conditions
+  SRCS
+    "internal/conditions.cc"
+  HDRS
+    "internal/conditions.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::base
+    absl::config
+    absl::core_headers
+    absl::log_internal_voidify
+)
+
+absl_cc_library(
+  NAME
+    log_internal_config
+  SRCS
+  HDRS
+    "internal/config.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+)
+
+absl_cc_library(
+  NAME
+    log_internal_flags
+  SRCS
+  HDRS
+    "internal/flags.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::flags
+)
+
+absl_cc_library(
+  NAME
+    log_internal_format
+  SRCS
+    "internal/log_format.cc"
+  HDRS
+    "internal/log_format.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_internal_config
+    absl::log_internal_globals
+    absl::log_severity
+    absl::strings
+    absl::str_format
+    absl::time
+    absl::span
+)
+
+absl_cc_library(
+  NAME
+    log_internal_globals
+  SRCS
+    "internal/globals.cc"
+  HDRS
+    "internal/globals.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_severity
+    absl::raw_logging_internal
+    absl::strings
+    absl::time
+)
+
+absl_cc_library(
+  NAME
+    log_internal_message
+  SRCS
+    "internal/log_message.cc"
+  HDRS
+    "internal/log_message.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::base
+    absl::config
+    absl::core_headers
+    absl::errno_saver
+    absl::inlined_vector
+    absl::examine_stack
+    absl::log_internal_config
+    absl::log_internal_format
+    absl::log_internal_globals
+    absl::log_internal_log_sink_set
+    absl::log_internal_nullguard
+    absl::log_globals
+    absl::log_entry
+    absl::log_severity
+    absl::log_sink
+    absl::log_sink_registry
+    absl::memory
+    absl::raw_logging_internal
+    absl::strings
+    absl::strerror
+    absl::str_format
+    absl::time
+    absl::span
+)
+
+absl_cc_library(
+  NAME
+    log_internal_log_sink_set
+  SRCS
+    "internal/log_sink_set.cc"
+  HDRS
+    "internal/log_sink_set.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+    $<$<BOOL:${ANDROID}>:-llog>
+  DEPS
+    absl::base
+    absl::cleanup
+    absl::config
+    absl::core_headers
+    absl::log_internal_config
+    absl::log_internal_globals
+    absl::log_globals
+    absl::log_entry
+    absl::log_severity
+    absl::log_sink
+    absl::raw_logging_internal
+    absl::synchronization
+    absl::span
+    absl::strings
+)
+
+absl_cc_library(
+  NAME
+    log_internal_nullguard
+  SRCS
+  HDRS
+    "internal/nullguard.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+)
+
+absl_cc_library(
+  NAME
+    log_internal_nullstream
+  SRCS
+  HDRS
+    "internal/nullstream.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_severity
+    absl::strings
+)
+
+absl_cc_library(
+  NAME
+    log_internal_strip
+  SRCS
+  HDRS
+    "internal/strip.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::log_internal_message
+    absl::log_internal_nullstream
+    absl::log_severity
+)
+
+absl_cc_library(
+  NAME
+    log_internal_test_actions
+  SRCS
+    "internal/test_actions.cc"
+  HDRS
+    "internal/test_actions.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_entry
+    absl::log_internal_config
+    absl::log_severity
+    absl::strings
+    absl::time
+  TESTONLY
+)
+
+absl_cc_library(
+  NAME
+    log_internal_test_helpers
+  SRCS
+    "internal/test_helpers.cc"
+  HDRS
+    "internal/test_helpers.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_globals
+    absl::log_initialize
+    absl::log_internal_globals
+    absl::log_severity
+    GTest::gtest
+  TESTONLY
+)
+
+absl_cc_library(
+  NAME
+    log_internal_test_matchers
+  SRCS
+    "internal/test_matchers.cc"
+  HDRS
+    "internal/test_matchers.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_entry
+    absl::log_internal_config
+    absl::log_internal_test_helpers
+    absl::log_severity
+    absl::strings
+    absl::time
+    GTest::gtest
+    GTest::gmock
+  TESTONLY
+)
+
+absl_cc_library(
+  NAME
+    log_internal_voidify
+  SRCS
+  HDRS
+    "internal/voidify.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+)
+
+# Public targets
+absl_cc_library(
+  NAME
+    check
+  SRCS
+  HDRS
+    "check.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log_internal_check_op
+    absl::log_internal_conditions
+    absl::log_internal_message
+    absl::log_internal_strip
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    die_if_null
+  SRCS
+    "die_if_null.cc"
+  HDRS
+    "die_if_null.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log
+    absl::strings
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log_flags
+  SRCS
+    "flags.cc"
+  HDRS
+    "flags.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_globals
+    absl::log_severity
+    absl::log_internal_config
+    absl::log_internal_flags
+    absl::flags
+    absl::flags_marshalling
+    absl::strings
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log_globals
+  SRCS
+    "globals.cc"
+  HDRS
+    "globals.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::atomic_hook
+    absl::config
+    absl::core_headers
+    absl::hash
+    absl::log_severity
+    absl::strings
+)
+
+absl_cc_library(
+  NAME
+    log_initialize
+  SRCS
+    "initialize.cc"
+  HDRS
+    "initialize.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_globals
+    absl::log_internal_globals
+    absl::time
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log
+  SRCS
+  HDRS
+    "log.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::log_internal_conditions
+    absl::log_internal_message
+    absl::log_internal_strip
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log_entry
+  SRCS
+    "log_entry.cc"
+  HDRS
+    "log_entry.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_internal_config
+    absl::log_severity
+    absl::span
+    absl::strings
+    absl::time
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log_sink
+  SRCS
+    "log_sink.cc"
+  HDRS
+    "log_sink.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_entry
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log_sink_registry
+  SRCS
+  HDRS
+    "log_sink_registry.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_sink
+    absl::log_internal_log_sink_set
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    log_streamer
+  SRCS
+  HDRS
+    "log_streamer.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log
+    absl::log_severity
+    absl::optional
+    absl::strings
+    absl::strings_internal
+    absl::utility
+  PUBLIC
+)
+
+absl_cc_library(
+  NAME
+    scoped_mock_log
+  SRCS
+    "scoped_mock_log.cc"
+  HDRS
+    "scoped_mock_log.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::log_entry
+    absl::log_severity
+    absl::log_sink
+    absl::log_sink_registry
+    absl::raw_logging_internal
+    absl::strings
+    GTest::gmock
+    GTest::gtest
+  PUBLIC
+  TESTONLY
+)
+
+# Test targets
+absl_cc_test(
+  NAME
+    basic_log_test
+  SRCS
+    "basic_log_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::base
+    absl::log
+    absl::log_entry
+    absl::log_globals
+    absl::log_severity
+    absl::log_internal_test_actions
+    absl::log_internal_test_helpers
+    absl::log_internal_test_matchers
+    absl::scoped_mock_log
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    check_test
+  SRCS
+    "check_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::check
+    absl::config
+    absl::core_headers
+    absl::log_internal_test_helpers
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    die_if_null_test
+  SRCS
+    "die_if_null_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::die_if_null
+    absl::log_internal_test_helpers
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_flags_test
+  SRCS
+    "flags_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log
+    absl::log_flags
+    absl::log_globals
+    absl::log_internal_flags
+    absl::log_internal_test_helpers
+    absl::log_internal_test_matchers
+    absl::log_severity
+    absl::flags
+    absl::flags_reflection
+    absl::scoped_mock_log
+    absl::strings
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_entry_test
+  SRCS
+    "log_entry_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::config
+    absl::core_headers
+    absl::log_entry
+    absl::log_internal_format
+    absl::log_internal_globals
+    absl::log_internal_test_helpers
+    absl::log_severity
+    absl::span
+    absl::strings
+    absl::time
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_globals_test
+  SRCS
+    "globals_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log
+    absl::log_globals
+    absl::log_internal_globals
+    absl::log_internal_test_helpers
+    absl::log_severity
+    absl::scoped_mock_log
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_format_test
+  SRCS
+    "log_format_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::log
+    absl::log_internal_config
+    absl::log_internal_test_matchers
+    absl::scoped_mock_log
+    absl::strings
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_macro_hygiene_test
+  SRCS
+    "log_macro_hygiene_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log
+    absl::log_severity
+    absl::scoped_mock_log
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_sink_test
+  SRCS
+    "log_sink_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log
+    absl::log_internal_test_actions
+    absl::log_internal_test_helpers
+    absl::log_internal_test_matchers
+    absl::log_sink
+    absl::log_sink_registry
+    absl::log_severity
+    absl::raw_logging_internal
+    absl::scoped_mock_log
+    absl::strings
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_streamer_test
+  SRCS
+    "log_streamer_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::base
+    absl::core_headers
+    absl::log
+    absl::log_internal_test_actions
+    absl::log_internal_test_helpers
+    absl::log_internal_test_matchers
+    absl::log_streamer
+    absl::log_severity
+    absl::scoped_mock_log
+    absl::strings
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_modifier_methods_test
+  SRCS
+    "log_modifier_methods_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::log
+    absl::log_internal_test_actions
+    absl::log_internal_test_helpers
+    absl::log_internal_test_matchers
+    absl::log_sink
+    absl::scoped_mock_log
+    absl::strings
+    absl::time
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    scoped_mock_log_test
+  SRCS
+    "scoped_mock_log_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log
+    absl::log_globals
+    absl::log_internal_globals
+    absl::log_internal_test_helpers
+    absl::log_internal_test_matchers
+    absl::log_severity
+    absl::memory
+    absl::scoped_mock_log
+    absl::strings
+    absl::synchronization
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_internal_stderr_log_sink_test
+  SRCS
+    "internal/stderr_log_sink_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::core_headers
+    absl::log
+    absl::log_globals
+    absl::log_internal_test_helpers
+    absl::log_severity
+    GTest::gmock
+    GTest::gtest_main
+)
+
+absl_cc_test(
+  NAME
+    log_stripping_test
+  SRCS
+    "stripping_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  LINKOPTS
+    ${ABSL_DEFAULT_LINKOPTS}
+  DEPS
+    absl::check
+    absl::flags_program_name
+    absl::log
+    absl::log_internal_test_helpers
+    absl::strerror
+    absl::strings
+    absl::str_format
+    GTest::gmock
+    GTest::gtest_main
+)
diff --git a/third_party/abseil-cpp/absl/log/basic_log_test.cc b/third_party/abseil-cpp/absl/log/basic_log_test.cc
new file mode 100644
index 0000000000..bc40f0d05b
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/basic_log_test.cc
@@ -0,0 +1,440 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// The testcases in this file are expected to pass or be skipped with any value
+// of ABSL_MIN_LOG_LEVEL
+
+#include <cerrno>
+#include <sstream>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/internal/sysinfo.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/test_actions.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/scoped_mock_log.h"
+
+namespace {
+#if GTEST_HAS_DEATH_TEST
+using ::absl::log_internal::DeathTestExpectedLogging;
+using ::absl::log_internal::DeathTestUnexpectedLogging;
+using ::absl::log_internal::DeathTestValidateExpectations;
+using ::absl::log_internal::DiedOfFatal;
+using ::absl::log_internal::DiedOfQFatal;
+#endif
+using ::absl::log_internal::LoggingEnabledAt;
+using ::absl::log_internal::LogSeverity;
+using ::absl::log_internal::Prefix;
+using ::absl::log_internal::SourceBasename;
+using ::absl::log_internal::SourceFilename;
+using ::absl::log_internal::SourceLine;
+using ::absl::log_internal::Stacktrace;
+using ::absl::log_internal::TextMessage;
+using ::absl::log_internal::ThreadID;
+using ::absl::log_internal::TimestampInMatchWindow;
+using ::absl::log_internal::Verbosity;
+using ::testing::AnyNumber;
+using ::testing::Eq;
+using ::testing::IsEmpty;
+using ::testing::IsTrue;
+
+class BasicLogTest : public testing::TestWithParam<absl::LogSeverityAtLeast> {};
+
+std::string ThresholdName(
+    testing::TestParamInfo<absl::LogSeverityAtLeast> severity) {
+  std::stringstream ostr;
+  ostr << severity.param;
+  return ostr.str().substr(
+      severity.param == absl::LogSeverityAtLeast::kInfinity ? 0 : 2);
+}
+
+INSTANTIATE_TEST_SUITE_P(WithParam, BasicLogTest,
+                         testing::Values(absl::LogSeverityAtLeast::kInfo,
+                                         absl::LogSeverityAtLeast::kWarning,
+                                         absl::LogSeverityAtLeast::kError,
+                                         absl::LogSeverityAtLeast::kFatal,
+                                         absl::LogSeverityAtLeast::kInfinity),
+                         ThresholdName);
+
+TEST_P(BasicLogTest, Info) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO) << "hello world"; };
+
+  if (LoggingEnabledAt(absl::LogSeverity::kInfo)) {
+    EXPECT_CALL(
+        test_sink,
+        Send(AllOf(SourceFilename(Eq(__FILE__)),
+                   SourceBasename(Eq("basic_log_test.cc")),
+                   SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                   LogSeverity(Eq(absl::LogSeverity::kInfo)),
+                   TimestampInMatchWindow(),
+                   ThreadID(Eq(absl::base_internal::GetTID())),
+                   TextMessage(Eq("hello world")),
+                   Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                   ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                      literal: "hello world"
+                                                    })pb")),
+                   Stacktrace(IsEmpty()))));
+  }
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+TEST_P(BasicLogTest, Warning) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(WARNING) << "hello world"; };
+
+  if (LoggingEnabledAt(absl::LogSeverity::kWarning)) {
+    EXPECT_CALL(
+        test_sink,
+        Send(AllOf(SourceFilename(Eq(__FILE__)),
+                   SourceBasename(Eq("basic_log_test.cc")),
+                   SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                   LogSeverity(Eq(absl::LogSeverity::kWarning)),
+                   TimestampInMatchWindow(),
+                   ThreadID(Eq(absl::base_internal::GetTID())),
+                   TextMessage(Eq("hello world")),
+                   Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                   ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                      literal: "hello world"
+                                                    })pb")),
+                   Stacktrace(IsEmpty()))));
+  }
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+TEST_P(BasicLogTest, Error) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(ERROR) << "hello world"; };
+
+  if (LoggingEnabledAt(absl::LogSeverity::kError)) {
+    EXPECT_CALL(
+        test_sink,
+        Send(AllOf(SourceFilename(Eq(__FILE__)),
+                   SourceBasename(Eq("basic_log_test.cc")),
+                   SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                   LogSeverity(Eq(absl::LogSeverity::kError)),
+                   TimestampInMatchWindow(),
+                   ThreadID(Eq(absl::base_internal::GetTID())),
+                   TextMessage(Eq("hello world")),
+                   Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                   ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                      literal: "hello world"
+                                                    })pb")),
+                   Stacktrace(IsEmpty()))));
+  }
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+#if GTEST_HAS_DEATH_TEST
+using BasicLogDeathTest = BasicLogTest;
+
+INSTANTIATE_TEST_SUITE_P(WithParam, BasicLogDeathTest,
+                         testing::Values(absl::LogSeverityAtLeast::kInfo,
+                                         absl::LogSeverityAtLeast::kFatal,
+                                         absl::LogSeverityAtLeast::kInfinity),
+                         ThresholdName);
+
+TEST_P(BasicLogDeathTest, Fatal) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(FATAL) << "hello world"; };
+
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink(
+            absl::MockLogDefault::kDisallowUnexpected);
+
+        EXPECT_CALL(test_sink, Send)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        ::testing::InSequence s;
+
+        // Note the logic in DeathTestValidateExpectations() caters for the case
+        // of logging being disabled at FATAL level.
+
+        if (LoggingEnabledAt(absl::LogSeverity::kFatal)) {
+          // The first call without the stack trace.
+          EXPECT_CALL(
+              test_sink,
+              Send(AllOf(SourceFilename(Eq(__FILE__)),
+                         SourceBasename(Eq("basic_log_test.cc")),
+                         SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                         LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                         TimestampInMatchWindow(),
+                         ThreadID(Eq(absl::base_internal::GetTID())),
+                         TextMessage(Eq("hello world")),
+                         Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { literal: "hello world" })pb")),
+                         Stacktrace(IsEmpty()))))
+              .WillOnce(DeathTestExpectedLogging());
+
+          // The second call with the stack trace.
+          EXPECT_CALL(
+              test_sink,
+              Send(AllOf(SourceFilename(Eq(__FILE__)),
+                         SourceBasename(Eq("basic_log_test.cc")),
+                         SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                         LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                         TimestampInMatchWindow(),
+                         ThreadID(Eq(absl::base_internal::GetTID())),
+                         TextMessage(Eq("hello world")),
+                         Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { literal: "hello world" })pb")),
+                         Stacktrace(Not(IsEmpty())))))
+              .WillOnce(DeathTestExpectedLogging());
+        }
+
+        test_sink.StartCapturingLogs();
+        do_log();
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+TEST_P(BasicLogDeathTest, QFatal) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(QFATAL) << "hello world"; };
+
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink(
+            absl::MockLogDefault::kDisallowUnexpected);
+
+        EXPECT_CALL(test_sink, Send)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        if (LoggingEnabledAt(absl::LogSeverity::kFatal)) {
+          EXPECT_CALL(
+              test_sink,
+              Send(AllOf(SourceFilename(Eq(__FILE__)),
+                         SourceBasename(Eq("basic_log_test.cc")),
+                         SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                         LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                         TimestampInMatchWindow(),
+                         ThreadID(Eq(absl::base_internal::GetTID())),
+                         TextMessage(Eq("hello world")),
+                         Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { literal: "hello world" })pb")),
+                         Stacktrace(IsEmpty()))))
+              .WillOnce(DeathTestExpectedLogging());
+        }
+
+        test_sink.StartCapturingLogs();
+        do_log();
+      },
+      DiedOfQFatal, DeathTestValidateExpectations());
+}
+#endif
+
+TEST_P(BasicLogTest, Level) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  for (auto severity : {absl::LogSeverity::kInfo, absl::LogSeverity::kWarning,
+                        absl::LogSeverity::kError}) {
+    absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+    const int log_line = __LINE__ + 1;
+    auto do_log = [severity] { LOG(LEVEL(severity)) << "hello world"; };
+
+    if (LoggingEnabledAt(severity)) {
+      EXPECT_CALL(
+          test_sink,
+          Send(AllOf(SourceFilename(Eq(__FILE__)),
+                     SourceBasename(Eq("basic_log_test.cc")),
+                     SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                     LogSeverity(Eq(severity)), TimestampInMatchWindow(),
+                     ThreadID(Eq(absl::base_internal::GetTID())),
+                     TextMessage(Eq("hello world")),
+                     Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                     ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                        literal: "hello world"
+                                                      })pb")),
+                     Stacktrace(IsEmpty()))));
+    }
+    test_sink.StartCapturingLogs();
+    do_log();
+  }
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST_P(BasicLogDeathTest, Level) {
+  // TODO(b/242568884): re-enable once bug is fixed.
+  // absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  // Ensure that `severity` is not a compile-time constant to prove that
+  // `LOG(LEVEL(severity))` works regardless:
+  auto volatile severity = absl::LogSeverity::kFatal;
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [severity] { LOG(LEVEL(severity)) << "hello world"; };
+
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink(
+            absl::MockLogDefault::kDisallowUnexpected);
+
+        EXPECT_CALL(test_sink, Send)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        ::testing::InSequence s;
+
+        if (LoggingEnabledAt(absl::LogSeverity::kFatal)) {
+          EXPECT_CALL(
+              test_sink,
+              Send(AllOf(SourceFilename(Eq(__FILE__)),
+                         SourceBasename(Eq("basic_log_test.cc")),
+                         SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                         LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                         TimestampInMatchWindow(),
+                         ThreadID(Eq(absl::base_internal::GetTID())),
+                         TextMessage(Eq("hello world")),
+                         Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { literal: "hello world" })pb")),
+                         Stacktrace(IsEmpty()))))
+              .WillOnce(DeathTestExpectedLogging());
+
+          EXPECT_CALL(
+              test_sink,
+              Send(AllOf(SourceFilename(Eq(__FILE__)),
+                         SourceBasename(Eq("basic_log_test.cc")),
+                         SourceLine(Eq(log_line)), Prefix(IsTrue()),
+                         LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                         TimestampInMatchWindow(),
+                         ThreadID(Eq(absl::base_internal::GetTID())),
+                         TextMessage(Eq("hello world")),
+                         Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel)),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { literal: "hello world" })pb")),
+                         Stacktrace(Not(IsEmpty())))))
+              .WillOnce(DeathTestExpectedLogging());
+        }
+
+        test_sink.StartCapturingLogs();
+        do_log();
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+#endif
+
+TEST_P(BasicLogTest, LevelClampsNegativeValues) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  if (!LoggingEnabledAt(absl::LogSeverity::kInfo)) {
+    GTEST_SKIP() << "This test cases required INFO log to be enabled";
+    return;
+  }
+
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(LogSeverity(Eq(absl::LogSeverity::kInfo))));
+
+  test_sink.StartCapturingLogs();
+  LOG(LEVEL(-1)) << "hello world";
+}
+
+TEST_P(BasicLogTest, LevelClampsLargeValues) {
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(GetParam());
+
+  if (!LoggingEnabledAt(absl::LogSeverity::kError)) {
+    GTEST_SKIP() << "This test cases required ERROR log to be enabled";
+    return;
+  }
+
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(LogSeverity(Eq(absl::LogSeverity::kError))));
+
+  test_sink.StartCapturingLogs();
+  LOG(LEVEL(static_cast<int>(absl::LogSeverity::kFatal) + 1)) << "hello world";
+}
+
+TEST(ErrnoPreservationTest, InSeverityExpression) {
+  errno = 77;
+  int saved_errno;
+  LOG(LEVEL((saved_errno = errno, absl::LogSeverity::kInfo)));
+  EXPECT_THAT(saved_errno, Eq(77));
+}
+
+TEST(ErrnoPreservationTest, InStreamedExpression) {
+  if (!LoggingEnabledAt(absl::LogSeverity::kInfo)) {
+    GTEST_SKIP() << "This test cases required INFO log to be enabled";
+    return;
+  }
+
+  errno = 77;
+  int saved_errno = 0;
+  LOG(INFO) << (saved_errno = errno, "hello world");
+  EXPECT_THAT(saved_errno, Eq(77));
+}
+
+TEST(ErrnoPreservationTest, AfterStatement) {
+  errno = 77;
+  LOG(INFO);
+  const int saved_errno = errno;
+  EXPECT_THAT(saved_errno, Eq(77));
+}
+
+// Tests that using a variable/parameter in a logging statement suppresses
+// unused-variable/parameter warnings.
+// -----------------------------------------------------------------------
+class UnusedVariableWarningCompileTest {
+  // These four don't prove anything unless `ABSL_MIN_LOG_LEVEL` is greater than
+  // `kInfo`.
+  static void LoggedVariable() {
+    const int x = 0;
+    LOG(INFO) << x;
+  }
+  static void LoggedParameter(const int x) { LOG(INFO) << x; }
+  static void SeverityVariable() {
+    const int x = 0;
+    LOG(LEVEL(x)) << "hello world";
+  }
+  static void SeverityParameter(const int x) { LOG(LEVEL(x)) << "hello world"; }
+};
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/check.h b/third_party/abseil-cpp/absl/log/check.h
new file mode 100644
index 0000000000..c7303b8def
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/check.h
@@ -0,0 +1,227 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/check.h
+// -----------------------------------------------------------------------------
+//
+// This header declares a family of `CHECK` macros.
+//
+// `CHECK` macros terminate the program with a fatal error if the specified
+// condition is not true.
+//
+// Except for those whose names begin with `DCHECK`, these macros are not
+// controlled by `NDEBUG` (cf. `assert`), so the check will be executed
+// regardless of compilation mode. `CHECK` and friends are thus useful for
+// confirming invariants in situations where continuing to run would be worse
+// than terminating, e.g., due to risk of data corruption or security
+// compromise.  It is also more robust and portable to deliberately terminate
+// at a particular place with a useful message and backtrace than to assume some
+// ultimately unspecified and unreliable crashing behavior (such as a
+// "segmentation fault").
+
+#ifndef ABSL_LOG_CHECK_H_
+#define ABSL_LOG_CHECK_H_
+
+#include "absl/base/optimization.h"
+#include "absl/log/internal/check_op.h"     // IWYU pragma: export
+#include "absl/log/internal/conditions.h"   // IWYU pragma: export
+#include "absl/log/internal/log_message.h"  // IWYU pragma: export
+#include "absl/log/internal/strip.h"        // IWYU pragma: export
+
+// CHECK()
+//
+// `CHECK` terminates the program with a fatal error if `condition` is not true.
+//
+// The message may include additional information such as stack traces, when
+// available.
+//
+// Example:
+//
+//   CHECK(!cheese.empty()) << "Out of Cheese";
+//
+// Might produce a message like:
+//
+//   Check failed: !cheese.empty() Out of Cheese
+#define CHECK(condition)                                              \
+  ABSL_LOG_INTERNAL_CONDITION_FATAL(STATELESS,                        \
+                                    ABSL_PREDICT_FALSE(!(condition))) \
+  ABSL_LOG_INTERNAL_CHECK(#condition).InternalStream()
+
+// QCHECK()
+//
+// `QCHECK` behaves like `CHECK` but does not print a full stack trace and does
+// not run registered error handlers (as `QFATAL`).  It is useful when the
+// problem is definitely unrelated to program flow, e.g. when validating user
+// input.
+#define QCHECK(condition)                                              \
+  ABSL_LOG_INTERNAL_CONDITION_QFATAL(STATELESS,                        \
+                                     ABSL_PREDICT_FALSE(!(condition))) \
+  ABSL_LOG_INTERNAL_QCHECK(#condition).InternalStream()
+
+// PCHECK()
+//
+// `PCHECK` behaves like `CHECK` but appends a description of the current state
+// of `errno` to the failure message.
+//
+// Example:
+//
+//   int fd = open("/var/empty/missing", O_RDONLY);
+//   PCHECK(fd != -1) << "posix is difficult";
+//
+// Might produce a message like:
+//
+//   Check failed: fd != -1 posix is difficult: No such file or directory [2]
+#define PCHECK(condition) CHECK(condition).WithPerror()
+
+// DCHECK()
+//
+// `DCHECK` behaves like `CHECK` in debug mode and does nothing otherwise (as
+// `DLOG`).  Unlike with `CHECK` (but as with `assert`), it is not safe to rely
+// on evaluation of `condition`: when `NDEBUG` is enabled, DCHECK does not
+// evaluate the condition.
+#ifndef NDEBUG
+#define DCHECK(condition) CHECK(condition)
+#else
+#define DCHECK(condition) CHECK(true || (condition))
+#endif
+
+// `CHECK_EQ` and friends are syntactic sugar for `CHECK(x == y)` that
+// automatically output the expression being tested and the evaluated values on
+// either side.
+//
+// Example:
+//
+//   int x = 3, y = 5;
+//   CHECK_EQ(2 * x, y) << "oops!";
+//
+// Might produce a message like:
+//
+//   Check failed: 2 * x == y (6 vs. 5) oops!
+//
+// The values must implement the appropriate comparison operator as well as
+// `operator<<(std::ostream&, ...)`.  Care is taken to ensure that each
+// argument is evaluated exactly once, and that anything which is legal to pass
+// as a function argument is legal here.  In particular, the arguments may be
+// temporary expressions which will end up being destroyed at the end of the
+// statement,
+//
+// Example:
+//
+//   CHECK_EQ(std::string("abc")[1], 'b');
+//
+// WARNING: Passing `NULL` as an argument to `CHECK_EQ` and similar macros does
+// not compile.  Use `nullptr` instead.
+#define CHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_EQ, ==, val1, val2)
+#define CHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_NE, !=, val1, val2)
+#define CHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_LE, <=, val1, val2)
+#define CHECK_LT(val1, val2) ABSL_LOG_INTERNAL_CHECK_OP(Check_LT, <, val1, val2)
+#define CHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_GE, >=, val1, val2)
+#define CHECK_GT(val1, val2) ABSL_LOG_INTERNAL_CHECK_OP(Check_GT, >, val1, val2)
+#define QCHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_EQ, ==, val1, val2)
+#define QCHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_NE, !=, val1, val2)
+#define QCHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_LE, <=, val1, val2)
+#define QCHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_LT, <, val1, val2)
+#define QCHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_GE, >=, val1, val2)
+#define QCHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_GT, >, val1, val2)
+#ifndef NDEBUG
+#define DCHECK_EQ(val1, val2) CHECK_EQ(val1, val2)
+#define DCHECK_NE(val1, val2) CHECK_NE(val1, val2)
+#define DCHECK_LE(val1, val2) CHECK_LE(val1, val2)
+#define DCHECK_LT(val1, val2) CHECK_LT(val1, val2)
+#define DCHECK_GE(val1, val2) CHECK_GE(val1, val2)
+#define DCHECK_GT(val1, val2) CHECK_GT(val1, val2)
+#else  // ndef NDEBUG
+#define DCHECK_EQ(val1, val2) ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define DCHECK_NE(val1, val2) ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define DCHECK_LE(val1, val2) ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define DCHECK_LT(val1, val2) ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define DCHECK_GE(val1, val2) ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define DCHECK_GT(val1, val2) ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#endif  // def NDEBUG
+
+// `CHECK_OK` and friends validate that the provided `absl::Status` or
+// `absl::StatusOr<T>` is OK.  If it isn't, they print a failure message that
+// includes the actual status and terminate the program.
+//
+// As with all `DCHECK` variants, `DCHECK_OK` has no effect (not even
+// evaluating its argument) if `NDEBUG` is enabled.
+//
+// Example:
+//
+//   CHECK_OK(FunctionReturnsStatus(x, y, z)) << "oops!";
+//
+// Might produce a message like:
+//
+//   Check failed: FunctionReturnsStatus(x, y, z) is OK (ABORTED: timeout) oops!
+#define CHECK_OK(status) ABSL_LOG_INTERNAL_CHECK_OK(status)
+#define QCHECK_OK(status) ABSL_LOG_INTERNAL_QCHECK_OK(status)
+#ifndef NDEBUG
+#define DCHECK_OK(status) ABSL_LOG_INTERNAL_CHECK_OK(status)
+#else
+#define DCHECK_OK(status) ABSL_LOG_INTERNAL_DCHECK_NOP(status, nullptr)
+#endif
+
+// `CHECK_STREQ` and friends provide `CHECK_EQ` functionality for C strings,
+// i.e., nul-terminated char arrays.  The `CASE` versions are case-insensitive.
+//
+// Example:
+//
+//   CHECK_STREQ(argv[0], "./skynet");
+//
+// Note that both arguments may be temporary strings which are destroyed by the
+// compiler at the end of the current full expression.
+//
+// Example:
+//
+//   CHECK_STREQ(Foo().c_str(), Bar().c_str());
+#define CHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcmp, ==, true, s1, s2)
+#define CHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcmp, !=, false, s1, s2)
+#define CHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcasecmp, ==, true, s1, s2)
+#define CHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcasecmp, !=, false, s1, s2)
+#define QCHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcmp, ==, true, s1, s2)
+#define QCHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcmp, !=, false, s1, s2)
+#define QCHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcasecmp, ==, true, s1, s2)
+#define QCHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcasecmp, !=, false, s1, s2)
+#ifndef NDEBUG
+#define DCHECK_STREQ(s1, s2) CHECK_STREQ(s1, s2)
+#define DCHECK_STRCASEEQ(s1, s2) CHECK_STRCASEEQ(s1, s2)
+#define DCHECK_STRNE(s1, s2) CHECK_STRNE(s1, s2)
+#define DCHECK_STRCASENE(s1, s2) CHECK_STRCASENE(s1, s2)
+#else  // ndef NDEBUG
+#define DCHECK_STREQ(s1, s2) ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#define DCHECK_STRCASEEQ(s1, s2) ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#define DCHECK_STRNE(s1, s2) ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#define DCHECK_STRCASENE(s1, s2) ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#endif  // def NDEBUG
+
+#endif  // ABSL_LOG_CHECK_H_
diff --git a/third_party/abseil-cpp/absl/log/check_test.cc b/third_party/abseil-cpp/absl/log/check_test.cc
new file mode 100644
index 0000000000..4ce9d87224
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/check_test.cc
@@ -0,0 +1,433 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/check.h"
+
+#include <ostream>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/log/internal/test_helpers.h"
+
+namespace {
+using ::testing::AllOf;
+using ::testing::HasSubstr;
+using ::testing::Not;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+#if GTEST_HAS_DEATH_TEST
+
+TEST(CHECKDeathTest, TestBasicValues) {
+  CHECK(true);
+
+  EXPECT_DEATH(CHECK(false), "Check failed: false");
+
+  int i = 2;
+  CHECK(i != 3);  // NOLINT
+}
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+TEST(CHECKTest, TestLogicExpressions) {
+  int i = 5;
+  CHECK(i > 0 && i < 10);
+  CHECK(i < 0 || i > 3);
+}
+
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+ABSL_CONST_INIT const auto global_var_check = [](int i) {
+  CHECK(i > 0);  // NOLINT
+  return i + 1;
+}(3);
+
+ABSL_CONST_INIT const auto global_var = [](int i) {
+  CHECK_GE(i, 0);  // NOLINT
+  return i + 1;
+}(global_var_check);
+#endif  // ABSL_INTERNAL_CPLUSPLUS_LANG
+
+TEST(CHECKTest, TestPlacementsInCompoundStatements) {
+  // check placement inside if/else clauses
+  if (true) CHECK(true);
+
+  if (false)
+    ;  // NOLINT
+  else
+    CHECK(true);
+
+  switch (0)
+  case 0:
+    CHECK(true);  // NOLINT
+
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+  constexpr auto var = [](int i) {
+    CHECK(i > 0);  // NOLINT
+    return i + 1;
+  }(global_var);
+  (void)var;
+#endif  // ABSL_INTERNAL_CPLUSPLUS_LANG
+}
+
+TEST(CHECKTest, TestBoolConvertible) {
+  struct Tester {
+  } tester;
+  CHECK([&]() { return &tester; }());
+}
+
+#if GTEST_HAS_DEATH_TEST
+
+TEST(CHECKDeathTest, TestChecksWithSideeffects) {
+  int var = 0;
+  CHECK([&var]() {
+    ++var;
+    return true;
+  }());
+  EXPECT_EQ(var, 1);
+
+  EXPECT_DEATH(CHECK([&var]() {
+                 ++var;
+                 return false;
+               }()) << var,
+               "Check failed: .* 2");
+}
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+#if GTEST_HAS_DEATH_TEST
+
+TEST(CHECKDeachTest, TestOrderOfInvocationsBetweenCheckAndMessage) {
+  int counter = 0;
+
+  auto GetStr = [&counter]() -> std::string {
+    return counter++ == 0 ? "" : "non-empty";
+  };
+
+  EXPECT_DEATH(CHECK(!GetStr().empty()) << GetStr(), HasSubstr("non-empty"));
+}
+
+TEST(CHECKTest, TestSecondaryFailure) {
+  auto FailingRoutine = []() {
+    CHECK(false) << "Secondary";
+    return false;
+  };
+  EXPECT_DEATH(CHECK(FailingRoutine()) << "Primary",
+               AllOf(HasSubstr("Secondary"), Not(HasSubstr("Primary"))));
+}
+
+TEST(CHECKTest, TestSecondaryFailureInMessage) {
+  auto MessageGen = []() {
+    CHECK(false) << "Secondary";
+    return "Primary";
+  };
+  EXPECT_DEATH(CHECK(false) << MessageGen(),
+               AllOf(HasSubstr("Secondary"), Not(HasSubstr("Primary"))));
+}
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+TEST(CHECKTest, TestBinaryChecksWithPrimitives) {
+  CHECK_EQ(1, 1);
+  CHECK_NE(1, 2);
+  CHECK_GE(1, 1);
+  CHECK_GE(2, 1);
+  CHECK_LE(1, 1);
+  CHECK_LE(1, 2);
+  CHECK_GT(2, 1);
+  CHECK_LT(1, 2);
+}
+
+// For testing using CHECK*() on anonymous enums.
+enum { CASE_A, CASE_B };
+
+TEST(CHECKTest, TestBinaryChecksWithEnumValues) {
+  // Tests using CHECK*() on anonymous enums.
+  CHECK_EQ(CASE_A, CASE_A);
+  CHECK_NE(CASE_A, CASE_B);
+  CHECK_GE(CASE_A, CASE_A);
+  CHECK_GE(CASE_B, CASE_A);
+  CHECK_LE(CASE_A, CASE_A);
+  CHECK_LE(CASE_A, CASE_B);
+  CHECK_GT(CASE_B, CASE_A);
+  CHECK_LT(CASE_A, CASE_B);
+}
+
+TEST(CHECKTest, TestBinaryChecksWithNullptr) {
+  const void* p_null = nullptr;
+  const void* p_not_null = &p_null;
+  CHECK_EQ(p_null, nullptr);
+  CHECK_EQ(nullptr, p_null);
+  CHECK_NE(p_not_null, nullptr);
+  CHECK_NE(nullptr, p_not_null);
+}
+
+#if GTEST_HAS_DEATH_TEST
+
+// Test logging of various char-typed values by failing CHECK*().
+TEST(CHECKDeathTest, TestComparingCharsValues) {
+  {
+    char a = ';';
+    char b = 'b';
+    EXPECT_DEATH(CHECK_EQ(a, b), "Check failed: a == b \\(';' vs. 'b'\\)");
+    b = 1;
+    EXPECT_DEATH(CHECK_EQ(a, b),
+                 "Check failed: a == b \\(';' vs. char value 1\\)");
+  }
+  {
+    signed char a = ';';
+    signed char b = 'b';
+    EXPECT_DEATH(CHECK_EQ(a, b), "Check failed: a == b \\(';' vs. 'b'\\)");
+    b = -128;
+    EXPECT_DEATH(CHECK_EQ(a, b),
+                 "Check failed: a == b \\(';' vs. signed char value -128\\)");
+  }
+  {
+    unsigned char a = ';';
+    unsigned char b = 'b';
+    EXPECT_DEATH(CHECK_EQ(a, b), "Check failed: a == b \\(';' vs. 'b'\\)");
+    b = 128;
+    EXPECT_DEATH(CHECK_EQ(a, b),
+                 "Check failed: a == b \\(';' vs. unsigned char value 128\\)");
+  }
+}
+
+TEST(CHECKDeathTest, TestNullValuesAreReportedCleanly) {
+  const char* a = nullptr;
+  const char* b = nullptr;
+  EXPECT_DEATH(CHECK_NE(a, b),
+               "Check failed: a != b \\(\\(null\\) vs. \\(null\\)\\)");
+
+  a = "xx";
+  EXPECT_DEATH(CHECK_EQ(a, b), "Check failed: a == b \\(xx vs. \\(null\\)\\)");
+  EXPECT_DEATH(CHECK_EQ(b, a), "Check failed: b == a \\(\\(null\\) vs. xx\\)");
+
+  std::nullptr_t n{};
+  EXPECT_DEATH(CHECK_NE(n, nullptr),
+               "Check failed: n != nullptr \\(\\(null\\) vs. \\(null\\)\\)");
+}
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+TEST(CHECKTest, TestSTREQ) {
+  CHECK_STREQ("this", "this");
+  CHECK_STREQ(nullptr, nullptr);
+  CHECK_STRCASEEQ("this", "tHiS");
+  CHECK_STRCASEEQ(nullptr, nullptr);
+  CHECK_STRNE("this", "tHiS");
+  CHECK_STRNE("this", nullptr);
+  CHECK_STRCASENE("this", "that");
+  CHECK_STRCASENE(nullptr, "that");
+  CHECK_STREQ((std::string("a") + "b").c_str(), "ab");
+  CHECK_STREQ(std::string("test").c_str(),
+              (std::string("te") + std::string("st")).c_str());
+}
+
+TEST(CHECKTest, TestComparisonPlacementsInCompoundStatements) {
+  // check placement inside if/else clauses
+  if (true) CHECK_EQ(1, 1);
+  if (true) CHECK_STREQ("c", "c");
+
+  if (false)
+    ;  // NOLINT
+  else
+    CHECK_LE(0, 1);
+
+  if (false)
+    ;  // NOLINT
+  else
+    CHECK_STRNE("a", "b");
+
+  switch (0)
+  case 0:
+    CHECK_NE(1, 0);
+
+  switch (0)
+  case 0:
+    CHECK_STRCASEEQ("A", "a");
+
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+  constexpr auto var = [](int i) {
+    CHECK_GT(i, 0);
+    return i + 1;
+  }(global_var);
+  (void)var;
+
+  // CHECK_STR... checks are not supported in constexpr routines.
+  // constexpr auto var2 = [](int i) {
+  //  CHECK_STRNE("c", "d");
+  //  return i + 1;
+  // }(global_var);
+
+#if defined(__GNUC__)
+  int var3 = (({ CHECK_LE(1, 2); }), global_var < 10) ? 1 : 0;
+  (void)var3;
+
+  int var4 = (({ CHECK_STREQ("a", "a"); }), global_var < 10) ? 1 : 0;
+  (void)var4;
+#endif  // __GNUC__
+#endif  // ABSL_INTERNAL_CPLUSPLUS_LANG
+}
+
+TEST(CHECKTest, TestDCHECK) {
+#ifdef NDEBUG
+  DCHECK(1 == 2) << " DCHECK's shouldn't be compiled in normal mode";
+#endif
+  DCHECK(1 == 1);  // NOLINT(readability/check)
+  DCHECK_EQ(1, 1);
+  DCHECK_NE(1, 2);
+  DCHECK_GE(1, 1);
+  DCHECK_GE(2, 1);
+  DCHECK_LE(1, 1);
+  DCHECK_LE(1, 2);
+  DCHECK_GT(2, 1);
+  DCHECK_LT(1, 2);
+
+  // Test DCHECK on std::nullptr_t
+  const void* p_null = nullptr;
+  const void* p_not_null = &p_null;
+  DCHECK_EQ(p_null, nullptr);
+  DCHECK_EQ(nullptr, p_null);
+  DCHECK_NE(p_not_null, nullptr);
+  DCHECK_NE(nullptr, p_not_null);
+}
+
+TEST(CHECKTest, TestQCHECK) {
+  // The tests that QCHECK does the same as CHECK
+  QCHECK(1 == 1);  // NOLINT(readability/check)
+  QCHECK_EQ(1, 1);
+  QCHECK_NE(1, 2);
+  QCHECK_GE(1, 1);
+  QCHECK_GE(2, 1);
+  QCHECK_LE(1, 1);
+  QCHECK_LE(1, 2);
+  QCHECK_GT(2, 1);
+  QCHECK_LT(1, 2);
+
+  // Tests using QCHECK*() on anonymous enums.
+  QCHECK_EQ(CASE_A, CASE_A);
+  QCHECK_NE(CASE_A, CASE_B);
+  QCHECK_GE(CASE_A, CASE_A);
+  QCHECK_GE(CASE_B, CASE_A);
+  QCHECK_LE(CASE_A, CASE_A);
+  QCHECK_LE(CASE_A, CASE_B);
+  QCHECK_GT(CASE_B, CASE_A);
+  QCHECK_LT(CASE_A, CASE_B);
+}
+
+TEST(CHECKTest, TestQCHECKPlacementsInCompoundStatements) {
+  // check placement inside if/else clauses
+  if (true) QCHECK(true);
+
+  if (false)
+    ;  // NOLINT
+  else
+    QCHECK(true);
+
+  if (false)
+    ;  // NOLINT
+  else
+    QCHECK(true);
+
+  switch (0)
+  case 0:
+    QCHECK(true);
+
+#if ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
+  constexpr auto var = [](int i) {
+    QCHECK(i > 0);  // NOLINT
+    return i + 1;
+  }(global_var);
+  (void)var;
+
+#if defined(__GNUC__)
+  int var2 = (({ CHECK_LE(1, 2); }), global_var < 10) ? 1 : 0;
+  (void)var2;
+#endif  // __GNUC__
+#endif  // ABSL_INTERNAL_CPLUSPLUS_LANG
+}
+
+class ComparableType {
+ public:
+  explicit ComparableType(int v) : v_(v) {}
+
+  void MethodWithCheck(int i) {
+    CHECK_EQ(*this, i);
+    CHECK_EQ(i, *this);
+  }
+
+  int Get() const { return v_; }
+
+ private:
+  friend bool operator==(const ComparableType& lhs, const ComparableType& rhs) {
+    return lhs.v_ == rhs.v_;
+  }
+  friend bool operator!=(const ComparableType& lhs, const ComparableType& rhs) {
+    return lhs.v_ != rhs.v_;
+  }
+  friend bool operator<(const ComparableType& lhs, const ComparableType& rhs) {
+    return lhs.v_ < rhs.v_;
+  }
+  friend bool operator<=(const ComparableType& lhs, const ComparableType& rhs) {
+    return lhs.v_ <= rhs.v_;
+  }
+  friend bool operator>(const ComparableType& lhs, const ComparableType& rhs) {
+    return lhs.v_ > rhs.v_;
+  }
+  friend bool operator>=(const ComparableType& lhs, const ComparableType& rhs) {
+    return lhs.v_ >= rhs.v_;
+  }
+  friend bool operator==(const ComparableType& lhs, int rhs) {
+    return lhs.v_ == rhs;
+  }
+  friend bool operator==(int lhs, const ComparableType& rhs) {
+    return lhs == rhs.v_;
+  }
+
+  friend std::ostream& operator<<(std::ostream& out, const ComparableType& v) {
+    return out << "ComparableType{" << v.Get() << "}";
+  }
+
+  int v_;
+};
+
+TEST(CHECKTest, TestUserDefinedCompOp) {
+  CHECK_EQ(ComparableType{0}, ComparableType{0});
+  CHECK_NE(ComparableType{1}, ComparableType{2});
+  CHECK_LT(ComparableType{1}, ComparableType{2});
+  CHECK_LE(ComparableType{1}, ComparableType{2});
+  CHECK_GT(ComparableType{2}, ComparableType{1});
+  CHECK_GE(ComparableType{2}, ComparableType{2});
+}
+
+TEST(CHECKTest, TestCheckInMethod) {
+  ComparableType v{1};
+  v.MethodWithCheck(1);
+}
+
+TEST(CHECKDeathTest, TestUserDefinedStreaming) {
+  ComparableType v1{1};
+  ComparableType v2{2};
+
+  EXPECT_DEATH(
+      CHECK_EQ(v1, v2),
+      HasSubstr(
+          "Check failed: v1 == v2 (ComparableType{1} vs. ComparableType{2})"));
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/die_if_null.cc b/third_party/abseil-cpp/absl/log/die_if_null.cc
new file mode 100644
index 0000000000..19c6a28ed8
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/die_if_null.cc
@@ -0,0 +1,32 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/die_if_null.h"
+
+#include "absl/base/config.h"
+#include "absl/log/log.h"
+#include "absl/strings/str_cat.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+void DieBecauseNull(const char* file, int line, const char* exprtext) {
+  LOG(FATAL).AtLocation(file, line)
+      << absl::StrCat("Check failed: '", exprtext, "' Must be non-null");
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/die_if_null.h b/third_party/abseil-cpp/absl/log/die_if_null.h
new file mode 100644
index 0000000000..127a9ac882
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/die_if_null.h
@@ -0,0 +1,76 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/die_if_null.h
+// -----------------------------------------------------------------------------
+//
+// This header declares macro `ABSL_DIE_IF_NULL`.
+
+#ifndef ABSL_LOG_DIE_IF_NULL_H_
+#define ABSL_LOG_DIE_IF_NULL_H_
+
+#include <stdint.h>
+
+#include <utility>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+
+// ABSL_DIE_IF_NULL()
+//
+// `ABSL_DIE_IF_NULL` behaves as `CHECK_NE` against `nullptr` but *also*
+// "returns" its argument.  It is useful in initializers where statements (like
+// `CHECK_NE`) can't be used.  Outside initializers, prefer `CHECK` or
+// `CHECK_NE`. `ABSL_DIE_IF_NULL` works for both raw pointers and (compatible)
+// smart pointers including `std::unique_ptr` and `std::shared_ptr`; more
+// generally, it works for any type that can be compared to nullptr_t.  For
+// types that aren't raw pointers, `ABSL_DIE_IF_NULL` returns a reference to
+// its argument, preserving the value category. Example:
+//
+//   Foo() : bar_(ABSL_DIE_IF_NULL(MethodReturningUniquePtr())) {}
+//
+// Use `CHECK(ptr)` or `CHECK(ptr != nullptr)` if the returned pointer is
+// unused.
+#define ABSL_DIE_IF_NULL(val) \
+  ::absl::log_internal::DieIfNull(__FILE__, __LINE__, #val, (val))
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Crashes the process after logging `exprtext` annotated at the `file` and
+// `line` location. Called when `ABSL_DIE_IF_NULL` fails. Calling this function
+// generates less code than its implementation would if inlined, for a slight
+// code size reduction each time `ABSL_DIE_IF_NULL` is called.
+ABSL_ATTRIBUTE_NORETURN ABSL_ATTRIBUTE_NOINLINE void DieBecauseNull(
+    const char* file, int line, const char* exprtext);
+
+// Helper for `ABSL_DIE_IF_NULL`.
+template <typename T>
+ABSL_MUST_USE_RESULT T DieIfNull(const char* file, int line,
+                                 const char* exprtext, T&& t) {
+  if (ABSL_PREDICT_FALSE(t == nullptr)) {
+    // Call a non-inline helper function for a small code size improvement.
+    DieBecauseNull(file, line, exprtext);
+  }
+  return std::forward<T>(t);
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_DIE_IF_NULL_H_
diff --git a/third_party/abseil-cpp/absl/log/die_if_null_test.cc b/third_party/abseil-cpp/absl/log/die_if_null_test.cc
new file mode 100644
index 0000000000..b0aab781c3
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/die_if_null_test.cc
@@ -0,0 +1,107 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/die_if_null.h"
+
+#include <stdint.h>
+
+#include <memory>
+#include <utility>
+
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/log/internal/test_helpers.h"
+
+namespace {
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+// TODO(b/69907837): Revisit these tests with the goal of making them less
+// convoluted.
+TEST(AbslDieIfNull, Simple) {
+  int64_t t;
+  void* ptr = static_cast<void*>(&t);
+  void* ref = ABSL_DIE_IF_NULL(ptr);
+  ASSERT_EQ(ptr, ref);
+
+  char* t_as_char;
+  t_as_char = ABSL_DIE_IF_NULL(reinterpret_cast<char*>(&t));
+  (void)t_as_char;
+
+  unsigned char* t_as_uchar;
+  t_as_uchar = ABSL_DIE_IF_NULL(reinterpret_cast<unsigned char*>(&t));
+  (void)t_as_uchar;
+
+  int* t_as_int;
+  t_as_int = ABSL_DIE_IF_NULL(reinterpret_cast<int*>(&t));
+  (void)t_as_int;
+
+  int64_t* t_as_int64_t;
+  t_as_int64_t = ABSL_DIE_IF_NULL(reinterpret_cast<int64_t*>(&t));
+  (void)t_as_int64_t;
+
+  std::unique_ptr<int64_t> sptr(new int64_t);
+  EXPECT_EQ(sptr.get(), ABSL_DIE_IF_NULL(sptr).get());
+  ABSL_DIE_IF_NULL(sptr).reset();
+
+  int64_t* int_ptr = new int64_t();
+  EXPECT_EQ(int_ptr, ABSL_DIE_IF_NULL(std::unique_ptr<int64_t>(int_ptr)).get());
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST(DeathCheckAbslDieIfNull, Simple) {
+  void* ptr;
+  ASSERT_DEATH({ ptr = ABSL_DIE_IF_NULL(nullptr); }, "");
+  (void)ptr;
+
+  std::unique_ptr<int64_t> sptr;
+  ASSERT_DEATH(ptr = ABSL_DIE_IF_NULL(sptr).get(), "");
+}
+#endif
+
+// Ensures that ABSL_DIE_IF_NULL works with C++11's std::unique_ptr and
+// std::shared_ptr.
+TEST(AbslDieIfNull, DoesNotCompareSmartPointerToNULL) {
+  std::unique_ptr<int> up(new int);
+  EXPECT_EQ(&up, &ABSL_DIE_IF_NULL(up));
+  ABSL_DIE_IF_NULL(up).reset();
+
+  std::shared_ptr<int> sp(new int);
+  EXPECT_EQ(&sp, &ABSL_DIE_IF_NULL(sp));
+  ABSL_DIE_IF_NULL(sp).reset();
+}
+
+// Verifies that ABSL_DIE_IF_NULL returns an rvalue reference if its argument is
+// an rvalue reference.
+TEST(AbslDieIfNull, PreservesRValues) {
+  int64_t* ptr = new int64_t();
+  auto uptr = ABSL_DIE_IF_NULL(std::unique_ptr<int64_t>(ptr));
+  EXPECT_EQ(ptr, uptr.get());
+}
+
+// Verifies that ABSL_DIE_IF_NULL returns an lvalue if its argument is an
+// lvalue.
+TEST(AbslDieIfNull, PreservesLValues) {
+  int64_t array[2] = {0};
+  int64_t* a = array + 0;
+  int64_t* b = array + 1;
+  using std::swap;
+  swap(ABSL_DIE_IF_NULL(a), ABSL_DIE_IF_NULL(b));
+  EXPECT_EQ(array + 1, a);
+  EXPECT_EQ(array + 0, b);
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/flags.cc b/third_party/abseil-cpp/absl/log/flags.cc
new file mode 100644
index 0000000000..b5308881e4
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/flags.cc
@@ -0,0 +1,112 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/flags.h"
+
+#include <stddef.h>
+
+#include <algorithm>
+#include <cstdlib>
+#include <string>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/flags/flag.h"
+#include "absl/flags/marshalling.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/config.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+void SyncLoggingFlags() {
+  absl::SetFlag(&FLAGS_minloglevel, static_cast<int>(absl::MinLogLevel()));
+  absl::SetFlag(&FLAGS_log_prefix, absl::ShouldPrependLogPrefix());
+}
+
+bool RegisterSyncLoggingFlags() {
+  log_internal::SetLoggingGlobalsListener(&SyncLoggingFlags);
+  return true;
+}
+
+ABSL_ATTRIBUTE_UNUSED const bool unused = RegisterSyncLoggingFlags();
+
+template <typename T>
+T GetFromEnv(const char* varname, T dflt) {
+  const char* val = ::getenv(varname);
+  if (val != nullptr) {
+    std::string err;
+    ABSL_INTERNAL_CHECK(absl::ParseFlag(val, &dflt, &err), err.c_str());
+  }
+  return dflt;
+}
+
+constexpr absl::LogSeverityAtLeast StderrThresholdDefault() {
+  return absl::LogSeverityAtLeast::kError;
+}
+
+}  // namespace
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+ABSL_FLAG(int, stderrthreshold,
+          static_cast<int>(absl::log_internal::StderrThresholdDefault()),
+          "Log messages at or above this threshold level are copied to stderr.")
+    .OnUpdate([] {
+      absl::log_internal::RawSetStderrThreshold(
+          static_cast<absl::LogSeverityAtLeast>(
+              absl::GetFlag(FLAGS_stderrthreshold)));
+    });
+
+ABSL_FLAG(int, minloglevel, static_cast<int>(absl::LogSeverityAtLeast::kInfo),
+          "Messages logged at a lower level than this don't actually "
+          "get logged anywhere")
+    .OnUpdate([] {
+      absl::log_internal::RawSetMinLogLevel(
+          static_cast<absl::LogSeverityAtLeast>(
+              absl::GetFlag(FLAGS_minloglevel)));
+    });
+
+ABSL_FLAG(std::string, log_backtrace_at, "",
+          "Emit a backtrace when logging at file:linenum.")
+    .OnUpdate([] {
+      const std::string log_backtrace_at =
+          absl::GetFlag(FLAGS_log_backtrace_at);
+      if (log_backtrace_at.empty()) return;
+
+      const size_t last_colon = log_backtrace_at.rfind(':');
+      if (last_colon == log_backtrace_at.npos) return;
+
+      const absl::string_view file =
+          absl::string_view(log_backtrace_at).substr(0, last_colon);
+      int line;
+      if (absl::SimpleAtoi(
+              absl::string_view(log_backtrace_at).substr(last_colon + 1),
+              &line)) {
+        absl::SetLogBacktraceLocation(file, line);
+      }
+    });
+
+ABSL_FLAG(bool, log_prefix, true,
+          "Prepend the log prefix to the start of each log line")
+    .OnUpdate([] {
+      absl::log_internal::RawEnableLogPrefix(absl::GetFlag(FLAGS_log_prefix));
+    });
diff --git a/third_party/abseil-cpp/absl/log/flags.h b/third_party/abseil-cpp/absl/log/flags.h
new file mode 100644
index 0000000000..146cfdd6ca
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/flags.h
@@ -0,0 +1,43 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/flags.h
+// -----------------------------------------------------------------------------
+//
+
+#ifndef ABSL_LOG_FLAGS_H_
+#define ABSL_LOG_FLAGS_H_
+
+// The Abseil Logging library supports the following command line flags to
+// configure logging behavior at runtime:
+//
+// --stderrthreshold=<value>
+// Log messages at or above this threshold level are copied to stderr.
+//
+// --minloglevel=<value>
+// Messages logged at a lower level than this are discarded and don't actually
+// get logged anywhere.
+//
+// --log_backtrace_at=<file:linenum>
+// Emit a backtrace (stack trace) when logging at file:linenum.
+//
+// To use these commandline flags, the //absl/log:flags library must be
+// explicitly linked, and absl::ParseCommandLine() must be called before the
+// call to absl::InitializeLog().
+//
+// To configure the Log library programmatically, use the interfaces defined in
+// absl/log/globals.h.
+
+#endif  // ABSL_LOG_FLAGS_H_
diff --git a/third_party/abseil-cpp/absl/log/flags_test.cc b/third_party/abseil-cpp/absl/log/flags_test.cc
new file mode 100644
index 0000000000..a0f6d7630c
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/flags_test.cc
@@ -0,0 +1,184 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/flags.h"
+
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/flags/flag.h"
+#include "absl/flags/reflection.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/log/scoped_mock_log.h"
+#include "absl/strings/str_cat.h"
+
+namespace {
+using ::absl::log_internal::TextMessage;
+
+using ::testing::HasSubstr;
+using ::testing::Not;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+constexpr static absl::LogSeverityAtLeast DefaultStderrThreshold() {
+  return absl::LogSeverityAtLeast::kError;
+}
+
+class LogFlagsTest : public ::testing::Test {
+ protected:
+  absl::FlagSaver flag_saver_;
+};
+
+// This test is disabled because it adds order dependency to the test suite.
+// This order dependency is currently not fixable due to the way the
+// stderrthreshold global value is out of sync with the stderrthreshold flag.
+TEST_F(LogFlagsTest, DISABLED_StderrKnobsDefault) {
+  EXPECT_EQ(absl::StderrThreshold(), DefaultStderrThreshold());
+}
+
+TEST_F(LogFlagsTest, SetStderrThreshold) {
+  absl::SetFlag(&FLAGS_stderrthreshold,
+                static_cast<int>(absl::LogSeverityAtLeast::kInfo));
+
+  EXPECT_EQ(absl::StderrThreshold(), absl::LogSeverityAtLeast::kInfo);
+
+  absl::SetFlag(&FLAGS_stderrthreshold,
+                static_cast<int>(absl::LogSeverityAtLeast::kError));
+
+  EXPECT_EQ(absl::StderrThreshold(), absl::LogSeverityAtLeast::kError);
+}
+
+TEST_F(LogFlagsTest, SetMinLogLevel) {
+  absl::SetFlag(&FLAGS_minloglevel,
+                static_cast<int>(absl::LogSeverityAtLeast::kError));
+
+  EXPECT_EQ(absl::MinLogLevel(), absl::LogSeverityAtLeast::kError);
+
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
+      absl::LogSeverityAtLeast::kWarning);
+
+  EXPECT_EQ(absl::GetFlag(FLAGS_minloglevel),
+            static_cast<int>(absl::LogSeverityAtLeast::kWarning));
+}
+
+TEST_F(LogFlagsTest, PrependLogPrefix) {
+  absl::SetFlag(&FLAGS_log_prefix, false);
+
+  EXPECT_EQ(absl::ShouldPrependLogPrefix(), false);
+
+  absl::EnableLogPrefix(true);
+
+  EXPECT_EQ(absl::GetFlag(FLAGS_log_prefix), true);
+}
+
+TEST_F(LogFlagsTest, EmptyBacktraceAtFlag) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  absl::SetFlag(&FLAGS_log_backtrace_at, "");
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(Not(HasSubstr("(stacktrace:")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << "hello world";
+}
+
+TEST_F(LogFlagsTest, BacktraceAtNonsense) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  absl::SetFlag(&FLAGS_log_backtrace_at, "gibberish");
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(Not(HasSubstr("(stacktrace:")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << "hello world";
+}
+
+TEST_F(LogFlagsTest, BacktraceAtWrongFile) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO) << "hello world"; };
+  absl::SetFlag(&FLAGS_log_backtrace_at,
+                absl::StrCat("some_other_file.cc:", log_line));
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(Not(HasSubstr("(stacktrace:")))));
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+TEST_F(LogFlagsTest, BacktraceAtWrongLine) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO) << "hello world"; };
+  absl::SetFlag(&FLAGS_log_backtrace_at,
+                absl::StrCat("flags_test.cc:", log_line + 1));
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(Not(HasSubstr("(stacktrace:")))));
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+TEST_F(LogFlagsTest, BacktraceAtWholeFilename) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO) << "hello world"; };
+  absl::SetFlag(&FLAGS_log_backtrace_at, absl::StrCat(__FILE__, ":", log_line));
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(Not(HasSubstr("(stacktrace:")))));
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+TEST_F(LogFlagsTest, BacktraceAtNonmatchingSuffix) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO) << "hello world"; };
+  absl::SetFlag(&FLAGS_log_backtrace_at,
+                absl::StrCat("flags_test.cc:", log_line, "gibberish"));
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(Not(HasSubstr("(stacktrace:")))));
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+TEST_F(LogFlagsTest, LogsBacktrace) {
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfo);
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO) << "hello world"; };
+  absl::SetFlag(&FLAGS_log_backtrace_at,
+                absl::StrCat("flags_test.cc:", log_line));
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(TextMessage(HasSubstr("(stacktrace:"))));
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/globals.cc b/third_party/abseil-cpp/absl/log/globals.cc
new file mode 100644
index 0000000000..6dfe81f006
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/globals.cc
@@ -0,0 +1,148 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/globals.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <atomic>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/atomic_hook.h"
+#include "absl/base/log_severity.h"
+#include "absl/hash/hash.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace {
+
+// These atomics represent logging library configuration.
+// Integer types are used instead of absl::LogSeverity to ensure that a
+// lock-free std::atomic is used when possible.
+ABSL_CONST_INIT std::atomic<int> min_log_level{
+    static_cast<int>(absl::LogSeverityAtLeast::kInfo)};
+ABSL_CONST_INIT std::atomic<int> stderrthreshold{
+    static_cast<int>(absl::LogSeverityAtLeast::kError)};
+// We evaluate this value as a hash comparison to avoid having to
+// hold a mutex or make a copy (to access the value of a string-typed flag) in
+// very hot codepath.
+ABSL_CONST_INIT std::atomic<size_t> log_backtrace_at_hash{0};
+ABSL_CONST_INIT std::atomic<bool> prepend_log_prefix{true};
+
+ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
+absl::base_internal::AtomicHook<log_internal::LoggingGlobalsListener>
+    logging_globals_listener;
+
+size_t HashSiteForLogBacktraceAt(absl::string_view file, int line) {
+  return absl::HashOf(file, line);
+}
+
+void TriggerLoggingGlobalsListener() {
+  auto* listener = logging_globals_listener.Load();
+  if (listener != nullptr) listener();
+}
+
+}  // namespace
+
+namespace log_internal {
+
+void RawSetMinLogLevel(absl::LogSeverityAtLeast severity) {
+  min_log_level.store(static_cast<int>(severity), std::memory_order_release);
+}
+
+void RawSetStderrThreshold(absl::LogSeverityAtLeast severity) {
+  stderrthreshold.store(static_cast<int>(severity), std::memory_order_release);
+}
+
+void RawEnableLogPrefix(bool on_off) {
+  prepend_log_prefix.store(on_off, std::memory_order_release);
+}
+
+void SetLoggingGlobalsListener(LoggingGlobalsListener l) {
+  logging_globals_listener.Store(l);
+}
+
+}  // namespace log_internal
+
+absl::LogSeverityAtLeast MinLogLevel() {
+  return static_cast<absl::LogSeverityAtLeast>(
+      min_log_level.load(std::memory_order_acquire));
+}
+
+void SetMinLogLevel(absl::LogSeverityAtLeast severity) {
+  log_internal::RawSetMinLogLevel(severity);
+  TriggerLoggingGlobalsListener();
+}
+
+namespace log_internal {
+
+ScopedMinLogLevel::ScopedMinLogLevel(absl::LogSeverityAtLeast severity)
+    : saved_severity_(absl::MinLogLevel()) {
+  absl::SetMinLogLevel(severity);
+}
+ScopedMinLogLevel::~ScopedMinLogLevel() {
+  absl::SetMinLogLevel(saved_severity_);
+}
+
+}  // namespace log_internal
+
+absl::LogSeverityAtLeast StderrThreshold() {
+  return static_cast<absl::LogSeverityAtLeast>(
+      stderrthreshold.load(std::memory_order_acquire));
+}
+
+void SetStderrThreshold(absl::LogSeverityAtLeast severity) {
+  log_internal::RawSetStderrThreshold(severity);
+  TriggerLoggingGlobalsListener();
+}
+
+ScopedStderrThreshold::ScopedStderrThreshold(absl::LogSeverityAtLeast severity)
+    : saved_severity_(absl::StderrThreshold()) {
+  absl::SetStderrThreshold(severity);
+}
+
+ScopedStderrThreshold::~ScopedStderrThreshold() {
+  absl::SetStderrThreshold(saved_severity_);
+}
+
+namespace log_internal {
+
+bool ShouldLogBacktraceAt(absl::string_view file, int line) {
+  const size_t flag_hash =
+      log_backtrace_at_hash.load(std::memory_order_acquire);
+
+  return flag_hash != 0 && flag_hash == HashSiteForLogBacktraceAt(file, line);
+}
+
+}  // namespace log_internal
+
+void SetLogBacktraceLocation(absl::string_view file, int line) {
+  log_backtrace_at_hash.store(HashSiteForLogBacktraceAt(file, line),
+                              std::memory_order_release);
+}
+
+bool ShouldPrependLogPrefix() {
+  return prepend_log_prefix.load(std::memory_order_acquire);
+}
+
+void EnableLogPrefix(bool on_off) {
+  log_internal::RawEnableLogPrefix(on_off);
+  TriggerLoggingGlobalsListener();
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/globals.h b/third_party/abseil-cpp/absl/log/globals.h
new file mode 100644
index 0000000000..32b87db058
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/globals.h
@@ -0,0 +1,165 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/globals.h
+// -----------------------------------------------------------------------------
+//
+// This header declares global logging library configuration knobs.
+
+#ifndef ABSL_LOG_GLOBALS_H_
+#define ABSL_LOG_GLOBALS_H_
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+//------------------------------------------------------------------------------
+//  Minimum Log Level
+//------------------------------------------------------------------------------
+//
+// Messages logged at or above this severity are directed to all registered log
+// sinks or skipped otherwise. This parameter can also be modified using
+// command line flag --minloglevel.
+// See absl/base/log_severity.h for descriptions of severity levels.
+
+// MinLogLevel()
+//
+// Returns the value of the Minimum Log Level parameter.
+// This function is async-signal-safe.
+ABSL_MUST_USE_RESULT absl::LogSeverityAtLeast MinLogLevel();
+
+// SetMinLogLevel()
+//
+// Updates the value of Minimum Log Level parameter.
+// This function is async-signal-safe.
+void SetMinLogLevel(absl::LogSeverityAtLeast severity);
+
+namespace log_internal {
+
+// ScopedMinLogLevel
+//
+// RAII type used to temporarily update the Min Log Level parameter.
+class ScopedMinLogLevel final {
+ public:
+  explicit ScopedMinLogLevel(absl::LogSeverityAtLeast severity);
+  ScopedMinLogLevel(const ScopedMinLogLevel&) = delete;
+  ScopedMinLogLevel& operator=(const ScopedMinLogLevel&) = delete;
+  ~ScopedMinLogLevel();
+
+ private:
+  absl::LogSeverityAtLeast saved_severity_;
+};
+
+}  // namespace log_internal
+
+//------------------------------------------------------------------------------
+// Stderr Threshold
+//------------------------------------------------------------------------------
+//
+// Messages logged at or above this level are directed to stderr in
+// addition to other registered log sinks. This parameter can also be modified
+// using command line flag --stderrthreshold.
+// See absl/base/log_severity.h for descriptions of severity levels.
+
+// StderrThreshold()
+//
+// Returns the value of the Stderr Threshold parameter.
+// This function is async-signal-safe.
+ABSL_MUST_USE_RESULT absl::LogSeverityAtLeast StderrThreshold();
+
+// SetStderrThreshold()
+//
+// Updates the Stderr Threshold parameter.
+// This function is async-signal-safe.
+void SetStderrThreshold(absl::LogSeverityAtLeast severity);
+inline void SetStderrThreshold(absl::LogSeverity severity) {
+  absl::SetStderrThreshold(static_cast<absl::LogSeverityAtLeast>(severity));
+}
+
+// ScopedStderrThreshold
+//
+// RAII type used to temporarily update the Stderr Threshold parameter.
+class ScopedStderrThreshold final {
+ public:
+  explicit ScopedStderrThreshold(absl::LogSeverityAtLeast severity);
+  ScopedStderrThreshold(const ScopedStderrThreshold&) = delete;
+  ScopedStderrThreshold& operator=(const ScopedStderrThreshold&) = delete;
+  ~ScopedStderrThreshold();
+
+ private:
+  absl::LogSeverityAtLeast saved_severity_;
+};
+
+//------------------------------------------------------------------------------
+// Log Backtrace At
+//------------------------------------------------------------------------------
+//
+// Users can request backtrace to be logged at specific locations, specified
+// by file and line number.
+
+// ShouldLogBacktraceAt()
+//
+// Returns true if we should log a backtrace at the specified location.
+namespace log_internal {
+ABSL_MUST_USE_RESULT bool ShouldLogBacktraceAt(absl::string_view file,
+                                               int line);
+}  // namespace log_internal
+
+// SetLogBacktraceLocation()
+//
+// Sets the location the backtrace should be logged at.
+void SetLogBacktraceLocation(absl::string_view file, int line);
+
+//------------------------------------------------------------------------------
+// Prepend Log Prefix
+//------------------------------------------------------------------------------
+//
+// This option tells the logging library that every logged message
+// should include the prefix (severity, date, time, PID, etc.)
+
+// ShouldPrependLogPrefix()
+//
+// Returns the value of the Prepend Log Prefix option.
+// This function is async-signal-safe.
+ABSL_MUST_USE_RESULT bool ShouldPrependLogPrefix();
+
+// EnableLogPrefix()
+//
+// Updates the value of the Prepend Log Prefix option.
+// This function is async-signal-safe.
+void EnableLogPrefix(bool on_off);
+
+namespace log_internal {
+
+using LoggingGlobalsListener = void (*)();
+void SetLoggingGlobalsListener(LoggingGlobalsListener l);
+
+// Internal implementation for the setter routines. These are used
+// to break circular dependencies between flags and globals. Each "Raw"
+// routine corresponds to the non-"Raw" counterpart and used to set the
+// configuration parameter directly without calling back to the listener.
+void RawSetMinLogLevel(absl::LogSeverityAtLeast severity);
+void RawSetStderrThreshold(absl::LogSeverityAtLeast severity);
+void RawEnableLogPrefix(bool on_off);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_GLOBALS_H_
diff --git a/third_party/abseil-cpp/absl/log/globals_test.cc b/third_party/abseil-cpp/absl/log/globals_test.cc
new file mode 100644
index 0000000000..6710c5aabb
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/globals_test.cc
@@ -0,0 +1,91 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/globals.h"
+
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/globals.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/log.h"
+#include "absl/log/scoped_mock_log.h"
+
+namespace {
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+constexpr static absl::LogSeverityAtLeast DefaultMinLogLevel() {
+  return absl::LogSeverityAtLeast::kInfo;
+}
+constexpr static absl::LogSeverityAtLeast DefaultStderrThreshold() {
+  return absl::LogSeverityAtLeast::kError;
+}
+
+TEST(TestGlobals, MinLogLevel) {
+  EXPECT_EQ(absl::MinLogLevel(), DefaultMinLogLevel());
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kError);
+  EXPECT_EQ(absl::MinLogLevel(), absl::LogSeverityAtLeast::kError);
+  absl::SetMinLogLevel(DefaultMinLogLevel());
+}
+
+TEST(TestGlobals, ScopedMinLogLevel) {
+  EXPECT_EQ(absl::MinLogLevel(), DefaultMinLogLevel());
+  {
+    absl::log_internal::ScopedMinLogLevel scoped_stderr_threshold(
+        absl::LogSeverityAtLeast::kError);
+    EXPECT_EQ(absl::MinLogLevel(), absl::LogSeverityAtLeast::kError);
+  }
+  EXPECT_EQ(absl::MinLogLevel(), DefaultMinLogLevel());
+}
+
+TEST(TestGlobals, StderrThreshold) {
+  EXPECT_EQ(absl::StderrThreshold(), DefaultStderrThreshold());
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kError);
+  EXPECT_EQ(absl::StderrThreshold(), absl::LogSeverityAtLeast::kError);
+  absl::SetStderrThreshold(DefaultStderrThreshold());
+}
+
+TEST(TestGlobals, ScopedStderrThreshold) {
+  EXPECT_EQ(absl::StderrThreshold(), DefaultStderrThreshold());
+  {
+    absl::ScopedStderrThreshold scoped_stderr_threshold(
+        absl::LogSeverityAtLeast::kError);
+    EXPECT_EQ(absl::StderrThreshold(), absl::LogSeverityAtLeast::kError);
+  }
+  EXPECT_EQ(absl::StderrThreshold(), DefaultStderrThreshold());
+}
+
+TEST(TestGlobals, LogBacktraceAt) {
+  EXPECT_FALSE(absl::log_internal::ShouldLogBacktraceAt("some_file.cc", 111));
+  absl::SetLogBacktraceLocation("some_file.cc", 111);
+  EXPECT_TRUE(absl::log_internal::ShouldLogBacktraceAt("some_file.cc", 111));
+  EXPECT_FALSE(
+      absl::log_internal::ShouldLogBacktraceAt("another_file.cc", 222));
+}
+
+TEST(TestGlobals, LogPrefix) {
+  EXPECT_TRUE(absl::ShouldPrependLogPrefix());
+  absl::EnableLogPrefix(false);
+  EXPECT_FALSE(absl::ShouldPrependLogPrefix());
+  absl::EnableLogPrefix(true);
+  EXPECT_TRUE(absl::ShouldPrependLogPrefix());
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/initialize.cc b/third_party/abseil-cpp/absl/log/initialize.cc
new file mode 100644
index 0000000000..a3f6d6c142
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/initialize.cc
@@ -0,0 +1,34 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/initialize.h"
+
+#include "absl/base/config.h"
+#include "absl/log/internal/globals.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+void InitializeLog() {
+  // This comes first since it is used by RAW_LOG.
+  absl::log_internal::SetTimeZone(absl::LocalTimeZone());
+
+  // Note that initialization is complete, so logs can now be sent to their
+  // proper destinations rather than stderr.
+  log_internal::SetInitialized();
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/initialize.h b/third_party/abseil-cpp/absl/log/initialize.h
new file mode 100644
index 0000000000..f600eb606c
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/initialize.h
@@ -0,0 +1,45 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/initialize.h
+// -----------------------------------------------------------------------------
+//
+// This header declares the Abseil Log initialization routine InitializeLog().
+
+#ifndef ABSL_LOG_INITIALIZE_H_
+#define ABSL_LOG_INITIALIZE_H_
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// InitializeLog()
+//
+// Initializes the Abseil logging library.
+//
+// Before this function is called, all log messages are directed only to stderr.
+// After initialization is finished, log messages are directed to all registered
+// `LogSink`s.
+//
+// It is an error to call this function twice.
+//
+// There is no corresponding function to shut down the logging library.
+void InitializeLog();
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INITIALIZE_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/BUILD.bazel b/third_party/abseil-cpp/absl/log/internal/BUILD.bazel
new file mode 100644
index 0000000000..19243a5836
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/BUILD.bazel
@@ -0,0 +1,307 @@
+#
+# Copyright 2022 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+load(
+    "//absl:copts/configure_copts.bzl",
+    "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
+    "ABSL_TEST_COPTS",
+)
+
+package(default_visibility = [
+    "//absl/log:__pkg__",
+])
+
+licenses(["notice"])
+
+cc_library(
+    name = "check_op",
+    srcs = ["check_op.cc"],
+    hdrs = ["check_op.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl/log:__pkg__",
+    ],
+    deps = [
+        ":nullguard",
+        ":nullstream",
+        ":strip",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/strings",
+    ],
+)
+
+cc_library(
+    name = "conditions",
+    srcs = ["conditions.cc"],
+    hdrs = ["conditions.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":voidify",
+        "//absl/base",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+    ],
+)
+
+cc_library(
+    name = "config",
+    hdrs = ["config.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl/log:__pkg__",
+    ],
+    deps = [
+        "//absl/base:config",
+        "//absl/base:core_headers",
+    ],
+)
+
+cc_library(
+    name = "flags",
+    hdrs = ["flags.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/flags:flag",
+    ],
+)
+
+cc_library(
+    name = "format",
+    srcs = ["log_format.cc"],
+    hdrs = ["log_format.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":config",
+        ":globals",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/strings",
+        "//absl/strings:str_format",
+        "//absl/time",
+        "//absl/types:span",
+    ],
+)
+
+cc_library(
+    name = "globals",
+    srcs = ["globals.cc"],
+    hdrs = ["globals.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl/log:__pkg__",
+    ],
+    deps = [
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/base:raw_logging_internal",
+        "//absl/strings",
+        "//absl/time",
+    ],
+)
+
+cc_library(
+    name = "log_message",
+    srcs = ["log_message.cc"],
+    hdrs = ["log_message.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl/log:__pkg__",
+    ],
+    deps = [
+        ":config",
+        ":format",
+        ":globals",
+        ":log_sink_set",
+        ":nullguard",
+        "//absl/base",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:errno_saver",
+        "//absl/base:log_severity",
+        "//absl/base:raw_logging_internal",
+        "//absl/base:strerror",
+        "//absl/container:inlined_vector",
+        "//absl/debugging:examine_stack",
+        "//absl/log:globals",
+        "//absl/log:log_entry",
+        "//absl/log:log_sink",
+        "//absl/log:log_sink_registry",
+        "//absl/memory",
+        "//absl/strings",
+        "//absl/strings:str_format",
+        "//absl/time",
+        "//absl/types:span",
+    ],
+)
+
+cc_library(
+    name = "log_sink_set",
+    srcs = ["log_sink_set.cc"],
+    hdrs = ["log_sink_set.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS + select({
+        "//conditions:default": [],
+        "@platforms//os:android": ["-llog"],
+    }),
+    deps = [
+        ":config",
+        ":globals",
+        "//absl/base",
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/base:raw_logging_internal",
+        "//absl/cleanup",
+        "//absl/log:globals",
+        "//absl/log:log_entry",
+        "//absl/log:log_sink",
+        "//absl/strings",
+        "//absl/synchronization",
+        "//absl/types:span",
+    ],
+)
+
+cc_library(
+    name = "nullguard",
+    hdrs = ["nullguard.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/base:config",
+    ],
+)
+
+cc_library(
+    name = "nullstream",
+    hdrs = ["nullstream.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        "//absl/base:config",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/strings",
+    ],
+)
+
+cc_library(
+    name = "strip",
+    hdrs = ["strip.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":log_message",
+        ":nullstream",
+        "//absl/base:log_severity",
+    ],
+)
+
+cc_library(
+    name = "test_actions",
+    testonly = True,
+    srcs = ["test_actions.cc"],
+    hdrs = ["test_actions.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":config",
+        "//absl/base:config",
+        "//absl/base:log_severity",
+        "//absl/log:log_entry",
+        "//absl/strings",
+        "//absl/time",
+    ],
+)
+
+cc_library(
+    name = "test_helpers",
+    testonly = True,
+    srcs = ["test_helpers.cc"],
+    hdrs = ["test_helpers.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":globals",
+        "//absl/base:config",
+        "//absl/base:log_severity",
+        "//absl/log:globals",
+        "//absl/log:initialize",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
+cc_library(
+    name = "test_matchers",
+    testonly = True,
+    srcs = ["test_matchers.cc"],
+    hdrs = ["test_matchers.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":config",
+        ":test_helpers",
+        "//absl/base:config",
+        "//absl/base:log_severity",
+        "//absl/log:log_entry",
+        "//absl/strings",
+        "//absl/time",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
+cc_library(
+    name = "voidify",
+    hdrs = ["voidify.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = ["//absl/base:config"],
+)
+
+# Test targets
+cc_test(
+    name = "stderr_log_sink_test",
+    size = "small",
+    srcs = ["stderr_log_sink_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test:os:android",
+        "no_test:os:ios",
+        "no_test_android",
+        "no_test_darwin_x86_64",
+        "no_test_ios",
+        "no_test_wasm",
+    ],
+    deps = [
+        ":test_helpers",
+        "//absl/base:core_headers",
+        "//absl/base:log_severity",
+        "//absl/log",
+        "//absl/log:globals",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
diff --git a/third_party/abseil-cpp/absl/log/internal/BUILD.gn b/third_party/abseil-cpp/absl/log/internal/BUILD.gn
new file mode 100644
index 0000000000..ff7be5c40a
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/BUILD.gn
@@ -0,0 +1,219 @@
+# Copyright 2022 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("check_op") {
+  sources = [ "check_op.cc" ]
+  public = [ "check_op.h" ]
+  deps = [
+    ":nullguard",
+    ":nullstream",
+    ":strip",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("conditions") {
+  sources = [ "conditions.cc" ]
+  public = [ "conditions.h" ]
+  deps = [
+    ":voidify",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_source_set("config") {
+  public = [ "config.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_source_set("flags") {
+  public = [ "flags.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/flags:flag" ]
+}
+
+absl_source_set("format") {
+  sources = [ "log_format.cc" ]
+  public = [ "log_format.h" ]
+  deps = [
+    ":config",
+    ":globals",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("globals") {
+  sources = [ "globals.cc" ]
+  public = [ "globals.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+}
+
+absl_source_set("log_message") {
+  sources = [ "log_message.cc" ]
+  public = [ "log_message.h" ]
+  deps = [
+    ":config",
+    ":format",
+    ":globals",
+    ":log_sink_set",
+    ":nullguard",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:errno_saver",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/base:strerror",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/debugging:examine_stack",
+    "//third_party/abseil-cpp/absl/log:globals",
+    "//third_party/abseil-cpp/absl/log:log_entry",
+    "//third_party/abseil-cpp/absl/log:log_sink",
+    "//third_party/abseil-cpp/absl/log:log_sink_registry",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+
+  # TODO(crbug.com/1382143): Needed for log_message.cc using ATOMIC_FLAG_INIT which is marked as deprecated.
+  # Remove when absl moves away from ATOMIC_FLAG_INIT (when the bug below is unblocked)
+  if (is_clang) {
+    cflags_cc = [ "-Wno-deprecated" ]
+  }
+}
+
+absl_source_set("log_sink_set") {
+  sources = [ "log_sink_set.cc" ]
+  public = [ "log_sink_set.h" ]
+  deps = [
+    ":config",
+    ":globals",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/cleanup",
+    "//third_party/abseil-cpp/absl/log:globals",
+    "//third_party/abseil-cpp/absl/log:log_entry",
+    "//third_party/abseil-cpp/absl/log:log_sink",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+  if (is_android) {
+    libs = [ "log" ]
+  }
+}
+
+absl_source_set("nullguard") {
+  public = [ "nullguard.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("nullstream") {
+  public = [ "nullstream.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("strip") {
+  public = [ "strip.h" ]
+  deps = [
+    ":log_message",
+    ":nullstream",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+  ]
+}
+
+absl_source_set("test_actions") {
+  testonly = true
+  sources = [ "test_actions.cc" ]
+  public = [ "test_actions.h" ]
+  deps = [
+    ":config",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log:log_entry",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+}
+
+absl_source_set("test_helpers") {
+  testonly = true
+  sources = [ "test_helpers.cc" ]
+  public = [ "test_helpers.h" ]
+  deps = [
+    ":globals",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log:globals",
+    "//third_party/abseil-cpp/absl/log:initialize",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("test_matchers") {
+  testonly = true
+  sources = [ "test_matchers.cc" ]
+  public = [ "test_matchers.h" ]
+  deps = [
+    ":config",
+    ":test_helpers",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log:log_entry",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/googletest:gmock",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+absl_source_set("voidify") {
+  public = [ "voidify.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_test("stderr_log_sink_test") {
+  sources = [ "stderr_log_sink_test.cc" ]
+  if (is_apple || is_android) {
+    sources = []
+  }
+  deps = [
+    ":test_helpers",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:log_severity",
+    "//third_party/abseil-cpp/absl/log",
+    "//third_party/abseil-cpp/absl/log:globals",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/log/internal/check_op.cc b/third_party/abseil-cpp/absl/log/internal/check_op.cc
new file mode 100644
index 0000000000..f4b67647a6
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/check_op.cc
@@ -0,0 +1,118 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/check_op.h"
+
+#include <string.h>
+
+#ifdef _MSC_VER
+#define strcasecmp _stricmp
+#else
+#include <strings.h>  // for strcasecmp, but msvc does not have this header
+#endif
+
+#include <sstream>
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/strings/str_cat.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+#define ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(x) \
+  template std::string* MakeCheckOpString(x, x, const char*)
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(bool);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(int64_t);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(uint64_t);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(float);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(double);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(char);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(unsigned char);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const std::string&);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const absl::string_view&);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const signed char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const unsigned char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const void*);
+#undef ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING
+
+CheckOpMessageBuilder::CheckOpMessageBuilder(const char* exprtext) {
+  stream_ << exprtext << " (";
+}
+
+std::ostream& CheckOpMessageBuilder::ForVar2() {
+  stream_ << " vs. ";
+  return stream_;
+}
+
+std::string* CheckOpMessageBuilder::NewString() {
+  stream_ << ")";
+  return new std::string(stream_.str());
+}
+
+void MakeCheckOpValueString(std::ostream& os, const char v) {
+  if (v >= 32 && v <= 126) {
+    os << "'" << v << "'";
+  } else {
+    os << "char value " << int{v};
+  }
+}
+
+void MakeCheckOpValueString(std::ostream& os, const signed char v) {
+  if (v >= 32 && v <= 126) {
+    os << "'" << v << "'";
+  } else {
+    os << "signed char value " << int{v};
+  }
+}
+
+void MakeCheckOpValueString(std::ostream& os, const unsigned char v) {
+  if (v >= 32 && v <= 126) {
+    os << "'" << v << "'";
+  } else {
+    os << "unsigned char value " << int{v};
+  }
+}
+
+void MakeCheckOpValueString(std::ostream& os, const void* p) {
+  if (p == nullptr) {
+    os << "(null)";
+  } else {
+    os << p;
+  }
+}
+
+// Helper functions for string comparisons.
+#define DEFINE_CHECK_STROP_IMPL(name, func, expected)                      \
+  std::string* Check##func##expected##Impl(const char* s1, const char* s2, \
+                                           const char* exprtext) {         \
+    bool equal = s1 == s2 || (s1 && s2 && !func(s1, s2));                  \
+    if (equal == expected) {                                               \
+      return nullptr;                                                      \
+    } else {                                                               \
+      return new std::string(                                              \
+          absl::StrCat(exprtext, " (", s1, " vs. ", s2, ")"));             \
+    }                                                                      \
+  }
+DEFINE_CHECK_STROP_IMPL(CHECK_STREQ, strcmp, true)
+DEFINE_CHECK_STROP_IMPL(CHECK_STRNE, strcmp, false)
+DEFINE_CHECK_STROP_IMPL(CHECK_STRCASEEQ, strcasecmp, true)
+DEFINE_CHECK_STROP_IMPL(CHECK_STRCASENE, strcasecmp, false)
+#undef DEFINE_CHECK_STROP_IMPL
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/check_op.h b/third_party/abseil-cpp/absl/log/internal/check_op.h
new file mode 100644
index 0000000000..559e5afc88
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/check_op.h
@@ -0,0 +1,385 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/check_op.h
+// -----------------------------------------------------------------------------
+//
+// This file declares helpers routines and macros used to implement `CHECK`
+// macros.
+
+#ifndef ABSL_LOG_INTERNAL_CHECK_OP_H_
+#define ABSL_LOG_INTERNAL_CHECK_OP_H_
+
+#include <stdint.h>
+
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <utility>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+#include "absl/log/internal/nullguard.h"
+#include "absl/log/internal/nullstream.h"
+#include "absl/log/internal/strip.h"
+
+// `ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL` wraps string literals that
+// should be stripped when `ABSL_MIN_LOG_LEVEL` exceeds `kFatal`.
+#ifdef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(literal)         \
+  (::absl::LogSeverity::kFatal >=                               \
+           static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) \
+       ? (literal)                                              \
+       : "")
+#else
+#define ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(literal) (literal)
+#endif
+
+#ifdef NDEBUG
+// `NDEBUG` is defined, so `DCHECK_EQ(x, y)` and so on do nothing.  However, we
+// still want the compiler to parse `x` and `y`, because we don't want to lose
+// potentially useful errors and warnings.
+#define ABSL_LOG_INTERNAL_DCHECK_NOP(x, y)   \
+  while (false && ((void)(x), (void)(y), 0)) \
+  ::absl::log_internal::NullStream().InternalStream()
+#endif
+
+#define ABSL_LOG_INTERNAL_CHECK_OP(name, op, val1, val2)                       \
+  while (                                                                      \
+      ::std::string* absl_log_internal_check_op_result ABSL_ATTRIBUTE_UNUSED = \
+          ::absl::log_internal::name##Impl(                                    \
+              ::absl::log_internal::GetReferenceableValue(val1),               \
+              ::absl::log_internal::GetReferenceableValue(val2),               \
+              ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(#val1 " " #op             \
+                                                           " " #val2)))        \
+  ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_op_result).InternalStream()
+#define ABSL_LOG_INTERNAL_QCHECK_OP(name, op, val1, val2)                  \
+  while (::std::string* absl_log_internal_qcheck_op_result =               \
+             ::absl::log_internal::name##Impl(                             \
+                 ::absl::log_internal::GetReferenceableValue(val1),        \
+                 ::absl::log_internal::GetReferenceableValue(val2),        \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(#val1 " " #op      \
+                                                              " " #val2))) \
+  ABSL_LOG_INTERNAL_QCHECK(*absl_log_internal_qcheck_op_result).InternalStream()
+#define ABSL_LOG_INTERNAL_CHECK_STROP(func, op, expected, s1, s2)              \
+  while (::std::string* absl_log_internal_check_strop_result =                 \
+             ::absl::log_internal::Check##func##expected##Impl(                \
+                 (s1), (s2),                                                   \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(#s1 " " #op " " #s2))) \
+  ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_strop_result)               \
+      .InternalStream()
+#define ABSL_LOG_INTERNAL_QCHECK_STROP(func, op, expected, s1, s2)             \
+  while (::std::string* absl_log_internal_qcheck_strop_result =                \
+             ::absl::log_internal::Check##func##expected##Impl(                \
+                 (s1), (s2),                                                   \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(#s1 " " #op " " #s2))) \
+  ABSL_LOG_INTERNAL_QCHECK(*absl_log_internal_qcheck_strop_result)             \
+      .InternalStream()
+// This one is tricky:
+// * We must evaluate `val` exactly once, yet we need to do two things with it:
+//   evaluate `.ok()` and (sometimes) `.ToString()`.
+// * `val` might be an `absl::Status` or some `absl::StatusOr<T>`.
+// * `val` might be e.g. `ATemporary().GetStatus()`, which may return a
+//   reference to a member of `ATemporary` that is only valid until the end of
+//   the full expression.
+// * We don't want this file to depend on `absl::Status` `#include`s or linkage,
+//   nor do we want to move the definition to status and introduce a dependency
+//   in the other direction.  We can be assured that callers must already have a
+//   `Status` and the necessary `#include`s and linkage.
+// * Callsites should be small and fast (at least when `val.ok()`): one branch,
+//   minimal stack footprint.
+//   * In particular, the string concat stuff should be out-of-line and emitted
+//     in only one TU to save linker input size
+// * We want the `val.ok()` check inline so static analyzers and optimizers can
+//   see it.
+// * As usual, no braces so we can stream into the expansion with `operator<<`.
+// * Also as usual, it must expand to a single (partial) statement with no
+//   ambiguous-else problems.
+#define ABSL_LOG_INTERNAL_CHECK_OK(val)                                      \
+  for (::std::pair<const ::absl::Status*, ::std::string*>                    \
+           absl_log_internal_check_ok_goo;                                   \
+       absl_log_internal_check_ok_goo.first =                                \
+           ::absl::log_internal::AsStatus(val),                              \
+       absl_log_internal_check_ok_goo.second =                               \
+           ABSL_PREDICT_TRUE(absl_log_internal_check_ok_goo.first->ok())     \
+               ? nullptr                                                     \
+               : ::absl::status_internal::MakeCheckFailString(               \
+                     absl_log_internal_check_ok_goo.first,                   \
+                     ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(#val " is OK")), \
+       !ABSL_PREDICT_TRUE(absl_log_internal_check_ok_goo.first->ok());)      \
+  ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_ok_goo.second)            \
+      .InternalStream()
+#define ABSL_LOG_INTERNAL_QCHECK_OK(val)                                     \
+  for (::std::pair<const ::absl::Status*, ::std::string*>                    \
+           absl_log_internal_check_ok_goo;                                   \
+       absl_log_internal_check_ok_goo.first =                                \
+           ::absl::log_internal::AsStatus(val),                              \
+       absl_log_internal_check_ok_goo.second =                               \
+           ABSL_PREDICT_TRUE(absl_log_internal_check_ok_goo.first->ok())     \
+               ? nullptr                                                     \
+               : ::absl::status_internal::MakeCheckFailString(               \
+                     absl_log_internal_check_ok_goo.first,                   \
+                     ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(#val " is OK")), \
+       !ABSL_PREDICT_TRUE(absl_log_internal_check_ok_goo.first->ok());)      \
+  ABSL_LOG_INTERNAL_QCHECK(*absl_log_internal_check_ok_goo.second)           \
+      .InternalStream()
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+class Status;
+template <typename T>
+class StatusOr;
+
+namespace status_internal {
+std::string* MakeCheckFailString(const absl::Status* status,
+                                 const char* prefix);
+}  // namespace status_internal
+
+namespace log_internal {
+
+// Convert a Status or a StatusOr to its underlying status value.
+//
+// (This implementation does not require a dep on absl::Status to work.)
+inline const absl::Status* AsStatus(const absl::Status& s) { return &s; }
+template <typename T>
+const absl::Status* AsStatus(const absl::StatusOr<T>& s) {
+  return &s.status();
+}
+
+// A helper class for formatting `expr (V1 vs. V2)` in a `CHECK_XX` statement.
+// See `MakeCheckOpString` for sample usage.
+class CheckOpMessageBuilder final {
+ public:
+  // Inserts `exprtext` and ` (` to the stream.
+  explicit CheckOpMessageBuilder(const char* exprtext);
+  ~CheckOpMessageBuilder() = default;
+  // For inserting the first variable.
+  std::ostream& ForVar1() { return stream_; }
+  // For inserting the second variable (adds an intermediate ` vs. `).
+  std::ostream& ForVar2();
+  // Get the result (inserts the closing `)`).
+  std::string* NewString();
+
+ private:
+  std::ostringstream stream_;
+};
+
+// This formats a value for a failing `CHECK_XX` statement.  Ordinarily, it uses
+// the definition for `operator<<`, with a few special cases below.
+template <typename T>
+inline void MakeCheckOpValueString(std::ostream& os, const T& v) {
+  os << log_internal::NullGuard<T>::Guard(v);
+}
+
+// Overloads for char types provide readable values for unprintable characters.
+void MakeCheckOpValueString(std::ostream& os, char v);
+void MakeCheckOpValueString(std::ostream& os, signed char v);
+void MakeCheckOpValueString(std::ostream& os, unsigned char v);
+void MakeCheckOpValueString(std::ostream& os, const void* p);
+
+namespace detect_specialization {
+
+// MakeCheckOpString is being specialized for every T and U pair that is being
+// passed to the CHECK_op macros. However, there is a lot of redundancy in these
+// specializations that creates unnecessary library and binary bloat.
+// The number of instantiations tends to be O(n^2) because we have two
+// independent inputs. This technique works by reducing `n`.
+//
+// Most user-defined types being passed to CHECK_op end up being printed as a
+// builtin type. For example, enums tend to be implicitly converted to its
+// underlying type when calling operator<<, and pointers are printed with the
+// `const void*` overload.
+// To reduce the number of instantiations we coerce these values before calling
+// MakeCheckOpString instead of inside it.
+//
+// To detect if this coercion is needed, we duplicate all the relevant
+// operator<< overloads as specified in the standard, just in a different
+// namespace. If the call to `stream << value` becomes ambiguous, it means that
+// one of these overloads is the one selected by overload resolution. We then
+// do overload resolution again just with our overload set to see which one gets
+// selected. That tells us which type to coerce to.
+// If the augmented call was not ambiguous, it means that none of these were
+// selected and we can't coerce the input.
+//
+// As a secondary step to reduce code duplication, we promote integral types to
+// their 64-bit variant. This does not change the printed value, but reduces the
+// number of instantiations even further. Promoting an integer is very cheap at
+// the call site.
+int64_t operator<<(std::ostream&, short value);           // NOLINT
+int64_t operator<<(std::ostream&, unsigned short value);  // NOLINT
+int64_t operator<<(std::ostream&, int value);
+int64_t operator<<(std::ostream&, unsigned int value);
+int64_t operator<<(std::ostream&, long value);                 // NOLINT
+uint64_t operator<<(std::ostream&, unsigned long value);       // NOLINT
+int64_t operator<<(std::ostream&, long long value);            // NOLINT
+uint64_t operator<<(std::ostream&, unsigned long long value);  // NOLINT
+float operator<<(std::ostream&, float value);
+double operator<<(std::ostream&, double value);
+long double operator<<(std::ostream&, long double value);
+bool operator<<(std::ostream&, bool value);
+const void* operator<<(std::ostream&, const void* value);
+const void* operator<<(std::ostream&, std::nullptr_t);
+
+// These `char` overloads are specified like this in the standard, so we have to
+// write them exactly the same to ensure the call is ambiguous.
+// If we wrote it in a different way (eg taking std::ostream instead of the
+// template) then one call might have a higher rank than the other and it would
+// not be ambiguous.
+template <typename Traits>
+char operator<<(std::basic_ostream<char, Traits>&, char);
+template <typename Traits>
+signed char operator<<(std::basic_ostream<char, Traits>&, signed char);
+template <typename Traits>
+unsigned char operator<<(std::basic_ostream<char, Traits>&, unsigned char);
+template <typename Traits>
+const char* operator<<(std::basic_ostream<char, Traits>&, const char*);
+template <typename Traits>
+const signed char* operator<<(std::basic_ostream<char, Traits>&,
+                              const signed char*);
+template <typename Traits>
+const unsigned char* operator<<(std::basic_ostream<char, Traits>&,
+                                const unsigned char*);
+
+// This overload triggers when the call is not ambiguous.
+// It means that T is being printed with some overload not on this list.
+// We keep the value as `const T&`.
+template <typename T, typename = decltype(std::declval<std::ostream&>()
+                                          << std::declval<const T&>())>
+const T& Detect(int);
+
+// This overload triggers when the call is ambiguous.
+// It means that T is either one from this list or printed as one from this
+// list. Eg an enum that decays to `int` for printing.
+// We ask the overload set to give us the type we want to convert it to.
+template <typename T>
+decltype(detect_specialization::operator<<(std::declval<std::ostream&>(),
+                                           std::declval<const T&>()))
+Detect(char);
+
+}  // namespace detect_specialization
+
+template <typename T>
+using CheckOpStreamType = decltype(detect_specialization::Detect<T>(0));
+
+// Build the error message string.  Specify no inlining for code size.
+template <typename T1, typename T2>
+ABSL_ATTRIBUTE_RETURNS_NONNULL std::string* MakeCheckOpString(
+    T1 v1, T2 v2, const char* exprtext) ABSL_ATTRIBUTE_NOINLINE;
+
+template <typename T1, typename T2>
+std::string* MakeCheckOpString(T1 v1, T2 v2, const char* exprtext) {
+  CheckOpMessageBuilder comb(exprtext);
+  MakeCheckOpValueString(comb.ForVar1(), v1);
+  MakeCheckOpValueString(comb.ForVar2(), v2);
+  return comb.NewString();
+}
+
+// Add a few commonly used instantiations as extern to reduce size of objects
+// files.
+#define ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(x) \
+  extern template std::string* MakeCheckOpString(x, x, const char*)
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(bool);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(int64_t);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(uint64_t);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(float);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(double);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(char);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(unsigned char);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const std::string&);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const absl::string_view&);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const char*);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const signed char*);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const unsigned char*);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const void*);
+#undef ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN
+
+// Helper functions for `ABSL_LOG_INTERNAL_CHECK_OP` macro family.  The
+// `(int, int)` override works around the issue that the compiler will not
+// instantiate the template version of the function on values of unnamed enum
+// type.
+#define ABSL_LOG_INTERNAL_CHECK_OP_IMPL(name, op)                        \
+  template <typename T1, typename T2>                                    \
+  inline constexpr ::std::string* name##Impl(const T1& v1, const T2& v2, \
+                                             const char* exprtext) {     \
+    using U1 = CheckOpStreamType<T1>;                                    \
+    using U2 = CheckOpStreamType<T2>;                                    \
+    return ABSL_PREDICT_TRUE(v1 op v2)                                   \
+               ? nullptr                                                 \
+               : MakeCheckOpString<U1, U2>(v1, v2, exprtext);            \
+  }                                                                      \
+  inline constexpr ::std::string* name##Impl(int v1, int v2,             \
+                                             const char* exprtext) {     \
+    return name##Impl<int, int>(v1, v2, exprtext);                       \
+  }
+
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_EQ, ==)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_NE, !=)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_LE, <=)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_LT, <)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_GE, >=)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_GT, >)
+#undef ABSL_LOG_INTERNAL_CHECK_OP_IMPL
+
+std::string* CheckstrcmptrueImpl(const char* s1, const char* s2,
+                                 const char* exprtext);
+std::string* CheckstrcmpfalseImpl(const char* s1, const char* s2,
+                                  const char* exprtext);
+std::string* CheckstrcasecmptrueImpl(const char* s1, const char* s2,
+                                     const char* exprtext);
+std::string* CheckstrcasecmpfalseImpl(const char* s1, const char* s2,
+                                      const char* exprtext);
+
+// `CHECK_EQ` and friends want to pass their arguments by reference, however
+// this winds up exposing lots of cases where people have defined and
+// initialized static const data members but never declared them (i.e. in a .cc
+// file), meaning they are not referenceable.  This function avoids that problem
+// for integers (the most common cases) by overloading for every primitive
+// integer type, even the ones we discourage, and returning them by value.
+template <typename T>
+inline constexpr const T& GetReferenceableValue(const T& t) {
+  return t;
+}
+inline constexpr char GetReferenceableValue(char t) { return t; }
+inline constexpr unsigned char GetReferenceableValue(unsigned char t) {
+  return t;
+}
+inline constexpr signed char GetReferenceableValue(signed char t) { return t; }
+inline constexpr short GetReferenceableValue(short t) { return t; }  // NOLINT
+inline constexpr unsigned short GetReferenceableValue(               // NOLINT
+    unsigned short t) {                                              // NOLINT
+  return t;
+}
+inline constexpr int GetReferenceableValue(int t) { return t; }
+inline unsigned int GetReferenceableValue(unsigned int t) { return t; }
+inline constexpr long GetReferenceableValue(long t) { return t; }  // NOLINT
+inline constexpr unsigned long GetReferenceableValue(              // NOLINT
+    unsigned long t) {                                             // NOLINT
+  return t;
+}
+inline constexpr long long GetReferenceableValue(long long t) {  // NOLINT
+  return t;
+}
+inline constexpr unsigned long long GetReferenceableValue(  // NOLINT
+    unsigned long long t) {                                 // NOLINT
+  return t;
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_CHECK_OP_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/conditions.cc b/third_party/abseil-cpp/absl/log/internal/conditions.cc
new file mode 100644
index 0000000000..a9f4966f5d
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/conditions.cc
@@ -0,0 +1,83 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/conditions.h"
+
+#include <atomic>
+#include <cstdint>
+
+#include "absl/base/config.h"
+#include "absl/base/internal/cycleclock.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+// The following code behaves like AtomicStatsCounter::LossyAdd() for
+// speed since it is fine to lose occasional updates.
+// Returns old value of *counter.
+uint32_t LossyIncrement(std::atomic<uint32_t>* counter) {
+  const uint32_t value = counter->load(std::memory_order_relaxed);
+  counter->store(value + 1, std::memory_order_relaxed);
+  return value;
+}
+
+}  // namespace
+
+bool LogEveryNState::ShouldLog(int n) {
+  return n > 0 && (LossyIncrement(&counter_) % static_cast<uint32_t>(n)) == 0;
+}
+
+bool LogFirstNState::ShouldLog(int n) {
+  const uint32_t counter_value = counter_.load(std::memory_order_relaxed);
+  if (static_cast<int64_t>(counter_value) < n) {
+    counter_.store(counter_value + 1, std::memory_order_relaxed);
+    return true;
+  }
+  return false;
+}
+
+bool LogEveryPow2State::ShouldLog() {
+  const uint32_t new_value = LossyIncrement(&counter_) + 1;
+  return (new_value & (new_value - 1)) == 0;
+}
+
+bool LogEveryNSecState::ShouldLog(double seconds) {
+  using absl::base_internal::CycleClock;
+  LossyIncrement(&counter_);
+  const int64_t now_cycles = CycleClock::Now();
+  int64_t next_cycles = next_log_time_cycles_.load(std::memory_order_relaxed);
+#if defined(__myriad2__)
+  // myriad2 does not have 8-byte compare and exchange.  Use a racy version that
+  // is "good enough" but will over-log in the face of concurrent logging.
+  if (now_cycles > next_cycles) {
+    next_log_time_cycles_.store(now_cycles + seconds * CycleClock::Frequency(),
+                                std::memory_order_relaxed);
+    return true;
+  }
+  return false;
+#else
+  do {
+    if (now_cycles <= next_cycles) return false;
+  } while (!next_log_time_cycles_.compare_exchange_weak(
+      next_cycles, now_cycles + seconds * CycleClock::Frequency(),
+      std::memory_order_relaxed, std::memory_order_relaxed));
+  return true;
+#endif
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/conditions.h b/third_party/abseil-cpp/absl/log/internal/conditions.h
new file mode 100644
index 0000000000..b89f1dfd7b
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/conditions.h
@@ -0,0 +1,222 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/conditions.h
+// -----------------------------------------------------------------------------
+//
+// This file contains implementation of conditional log statements, like LOG_IF
+// including all the ABSL_LOG_INTERNAL_..._CONDITION_... macros and
+// various condition classes like LogEveryNState.
+
+#ifndef ABSL_LOG_INTERNAL_CONDITIONS_H_
+#define ABSL_LOG_INTERNAL_CONDITIONS_H_
+
+#ifdef _WIN32
+#include <cstdlib>
+#else
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+
+#include <atomic>
+#include <cstdint>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/log/internal/voidify.h"
+
+// `ABSL_LOG_INTERNAL_CONDITION` prefixes another macro that expands to a
+// temporary `LogMessage` instantiation followed by zero or more streamed
+// expressions.  This definition is tricky to read correctly.  It evaluates to
+// either
+//
+//   (void)0;
+//
+// or
+//
+//   ::absl::log_internal::Voidify() &&
+//       ::absl::log_internal::LogMessage(...) << "the user's message";
+//
+// If the condition is evaluable at compile time, as is often the case, it
+// compiles away to just one side or the other.
+//
+// Although this is not used anywhere a statement (e.g. `if`) could not go,
+// the ternary expression does a better job avoiding spurious diagnostics
+// (dangling else, missing switch case) and preserving noreturn semantics (e.g.
+// on `LOG(FATAL)`) without requiring braces.
+#define ABSL_LOG_INTERNAL_STATELESS_CONDITION(condition) \
+  switch (0)                                             \
+  case 0:                                                \
+    !(condition) ? (void)0 : ::absl::log_internal::Voidify()&&
+
+// `ABSL_LOG_INTERNAL_STATEFUL_CONDITION` applies a condition like
+// `ABSL_LOG_INTERNAL_CONDITION` but adds to that a series of variable
+// declarations, including a local static object which stores the state needed
+// to implement the stateful macros like `LOG_EVERY_N`.
+//
+// `for`-loops are used to declare scoped variables without braces (to permit
+// streaming into the macro's expansion) and without the dangling-`else`
+// problems/diagnostics that come with `if`.
+//
+// Two more variables are declared in separate `for`-loops:
+//
+// * `COUNTER` implements a streamable token whose value when streamed is the
+//   number of times execution has passed through the macro.
+// * A boolean flag is used to prevent any of the `for`-loops from ever actually
+//   looping.
+#define ABSL_LOG_INTERNAL_STATEFUL_CONDITION(condition)             \
+  for (bool absl_log_internal_stateful_condition_do_log(condition); \
+       absl_log_internal_stateful_condition_do_log;                 \
+       absl_log_internal_stateful_condition_do_log = false)         \
+  ABSL_LOG_INTERNAL_STATEFUL_CONDITION_IMPL
+#define ABSL_LOG_INTERNAL_STATEFUL_CONDITION_IMPL(kind, ...)              \
+  for (static ::absl::log_internal::Log##kind##State                      \
+           absl_log_internal_stateful_condition_state;                    \
+       absl_log_internal_stateful_condition_do_log &&                     \
+       absl_log_internal_stateful_condition_state.ShouldLog(__VA_ARGS__); \
+       absl_log_internal_stateful_condition_do_log = false)               \
+    for (const uint32_t COUNTER ABSL_ATTRIBUTE_UNUSED =                   \
+             absl_log_internal_stateful_condition_state.counter();        \
+         absl_log_internal_stateful_condition_do_log;                     \
+         absl_log_internal_stateful_condition_do_log = false)
+
+// `ABSL_LOG_INTERNAL_CONDITION_*` serve to combine any conditions from the
+// macro (e.g. `LOG_IF` or `VLOG`) with inherent conditions (e.g.
+// `ABSL_MIN_LOG_LEVEL`) into a single boolean expression.  We could chain
+// ternary operators instead, however some versions of Clang sometimes issue
+// spurious diagnostics after such expressions due to a control flow analysis
+// bug.
+#ifdef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_CONDITION_INFO(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                   \
+      (condition) && ::absl::LogSeverity::kInfo >=        \
+                         static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))
+#define ABSL_LOG_INTERNAL_CONDITION_WARNING(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                      \
+      (condition) && ::absl::LogSeverity::kWarning >=        \
+                         static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))
+#define ABSL_LOG_INTERNAL_CONDITION_ERROR(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                    \
+      (condition) && ::absl::LogSeverity::kError >=        \
+                         static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))
+// NOTE: Use ternary operators instead of short-circuiting to mitigate
+// https://bugs.llvm.org/show_bug.cgi?id=51928.
+#define ABSL_LOG_INTERNAL_CONDITION_FATAL(type, condition)                 \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                                    \
+      ((condition)                                                         \
+           ? (::absl::LogSeverity::kFatal >=                               \
+                      static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) \
+                  ? true                                                   \
+                  : (::absl::log_internal::AbortQuietly(), false))         \
+           : false))
+// NOTE: Use ternary operators instead of short-circuiting to mitigate
+// https://bugs.llvm.org/show_bug.cgi?id=51928.
+#define ABSL_LOG_INTERNAL_CONDITION_QFATAL(type, condition)                \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                                    \
+      ((condition)                                                         \
+           ? (::absl::LogSeverity::kFatal >=                               \
+                      static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) \
+                  ? true                                                   \
+                  : (::absl::log_internal::ExitQuietly(), false))          \
+           : false))
+
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL(severity)                    \
+  for (int log_internal_severity_loop = 1; log_internal_severity_loop; \
+       log_internal_severity_loop = 0)                                 \
+    for (const absl::LogSeverity log_internal_severity =               \
+             ::absl::NormalizeLogSeverity(severity);                   \
+         log_internal_severity_loop; log_internal_severity_loop = 0)   \
+  ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL(type, condition)    \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                            \
+      (condition) &&                                               \
+      (log_internal_severity >=                                    \
+           static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) || \
+       (log_internal_severity == ::absl::LogSeverity::kFatal &&    \
+        (::absl::log_internal::AbortQuietly(), false))))
+#else  // ndef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_CONDITION_INFO(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_WARNING(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_ERROR(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_FATAL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_QFATAL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL(severity)                    \
+  for (int log_internal_severity_loop = 1; log_internal_severity_loop; \
+       log_internal_severity_loop = 0)                                 \
+    for (const absl::LogSeverity log_internal_severity =               \
+             ::absl::NormalizeLogSeverity(severity);                   \
+         log_internal_severity_loop; log_internal_severity_loop = 0)   \
+  ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#endif  // ndef ABSL_MIN_LOG_LEVEL
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Stateful condition class name should be "Log" + name + "State".
+class LogEveryNState final {
+ public:
+  bool ShouldLog(int n);
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+};
+
+class LogFirstNState final {
+ public:
+  bool ShouldLog(int n);
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+};
+
+class LogEveryPow2State final {
+ public:
+  bool ShouldLog();
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+};
+
+class LogEveryNSecState final {
+ public:
+  bool ShouldLog(double seconds);
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+  // Cycle count according to CycleClock that we should next log at.
+  std::atomic<int64_t> next_log_time_cycles_{0};
+};
+
+// Helper routines to abort the application quietly
+
+ABSL_ATTRIBUTE_NORETURN inline void AbortQuietly() { abort(); }
+ABSL_ATTRIBUTE_NORETURN inline void ExitQuietly() { _exit(1); }
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_CONDITIONS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/config.h b/third_party/abseil-cpp/absl/log/internal/config.h
new file mode 100644
index 0000000000..379e9ab974
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/config.h
@@ -0,0 +1,45 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/config.h
+// -----------------------------------------------------------------------------
+//
+
+#ifndef ABSL_LOG_INTERNAL_CONFIG_H_
+#define ABSL_LOG_INTERNAL_CONFIG_H_
+
+#include "absl/base/config.h"
+
+#ifdef _WIN32
+#include <cstdint>
+#else
+#include <sys/types.h>
+#endif
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+#ifdef _WIN32
+using Tid = uint32_t;
+#else
+using Tid = pid_t;
+#endif
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_CONFIG_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/flags.h b/third_party/abseil-cpp/absl/log/internal/flags.h
new file mode 100644
index 0000000000..0c5e81edee
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/flags.h
@@ -0,0 +1,53 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_flags.h
+// -----------------------------------------------------------------------------
+//
+// This header declares set of flags which can be used to configure Abseil
+// Logging library behaviour at runtime.
+
+#ifndef ABSL_LOG_INTERNAL_FLAGS_H_
+#define ABSL_LOG_INTERNAL_FLAGS_H_
+
+#include <string>
+
+#include "absl/flags/declare.h"
+
+// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+// These flags should not be used in C++ code to access logging library
+// configuration knobs. Use interfaces defined in absl/log/globals.h
+// instead. It is still ok to use these flags on a command line.
+// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+// Log messages at this severity or above are sent to stderr in *addition* to
+// logfiles.  Defaults to `ERROR`.  See log_severity.h for numeric values of
+// severity levels.
+ABSL_DECLARE_FLAG(int, stderrthreshold);
+
+// Log messages at this severity or above are logged; others are discarded.
+// Defaults to `INFO`, i.e. log all severities.  See log_severity.h for numeric
+// values of severity levels.
+ABSL_DECLARE_FLAG(int, minloglevel);
+
+// If specified in the form file:linenum, any messages logged from a matching
+// location will also include a backtrace.
+ABSL_DECLARE_FLAG(std::string, log_backtrace_at);
+
+// If true, the log prefix (severity, date, time, PID, etc.) is prepended to
+// each message logged. Defaults to true.
+ABSL_DECLARE_FLAG(bool, log_prefix);
+
+#endif  // ABSL_LOG_INTERNAL_FLAGS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/globals.cc b/third_party/abseil-cpp/absl/log/internal/globals.cc
new file mode 100644
index 0000000000..863b047f33
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/globals.cc
@@ -0,0 +1,125 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/globals.h"
+
+#include <atomic>
+#include <cstdio>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+namespace {
+// Keeps track of whether Logging initialization is finalized.
+// Log messages generated before that will go to stderr.
+ABSL_CONST_INIT std::atomic<bool> logging_initialized(false);
+
+// The TimeZone used for logging. This may only be set once.
+ABSL_CONST_INIT std::atomic<absl::TimeZone*> timezone_ptr{nullptr};
+
+// If true, the logging library will symbolize stack in fatal messages
+ABSL_CONST_INIT std::atomic<bool> symbolize_stack_trace(true);
+
+// Specifies maximum number of stack frames to report in fatal messages.
+ABSL_CONST_INIT std::atomic<int> max_frames_in_stack_trace(64);
+
+ABSL_CONST_INIT std::atomic<bool> exit_on_dfatal(true);
+ABSL_CONST_INIT std::atomic<bool> suppress_sigabort_trace(false);
+}  // namespace
+
+bool IsInitialized() {
+  return logging_initialized.load(std::memory_order_acquire);
+}
+
+void SetInitialized() {
+  logging_initialized.store(true, std::memory_order_release);
+}
+
+void WriteToStderr(absl::string_view message, absl::LogSeverity severity) {
+  // Avoid using std::cerr from this module since we may get called during
+  // exit code, and cerr may be partially or fully destroyed by then.
+  std::fwrite(message.data(), message.size(), 1, stderr);
+
+#if defined(_WIN64) || defined(_WIN32) || defined(_WIN16)
+  // C99 requires stderr to not be fully-buffered by default (7.19.3.7), but
+  // MS CRT buffers it anyway, so we must `fflush` to ensure the string hits
+  // the console/file before the program dies (and takes the libc buffers
+  // with it).
+  // https://docs.microsoft.com/en-us/cpp/c-runtime-library/stream-i-o
+  if (severity >= absl::LogSeverity::kWarning) {
+    std::fflush(stderr);
+  }
+#else
+  // Avoid unused parameter warning in this branch.
+  (void)severity;
+#endif
+}
+
+void SetTimeZone(absl::TimeZone tz) {
+  absl::TimeZone* expected = nullptr;
+  absl::TimeZone* new_tz = new absl::TimeZone(tz);
+  // timezone_ptr can only be set once, otherwise new_tz is leaked.
+  if (!timezone_ptr.compare_exchange_strong(expected, new_tz,
+                                            std::memory_order_release,
+                                            std::memory_order_relaxed)) {
+    ABSL_RAW_LOG(FATAL,
+                 "absl::log_internal::SetTimeZone() has already been called");
+  }
+}
+
+const absl::TimeZone* TimeZone() {
+  return timezone_ptr.load(std::memory_order_acquire);
+}
+
+bool ShouldSymbolizeLogStackTrace() {
+  return symbolize_stack_trace.load(std::memory_order_acquire);
+}
+
+void EnableSymbolizeLogStackTrace(bool on_off) {
+  symbolize_stack_trace.store(on_off, std::memory_order_release);
+}
+
+int MaxFramesInLogStackTrace() {
+  return max_frames_in_stack_trace.load(std::memory_order_acquire);
+}
+
+void SetMaxFramesInLogStackTrace(int max_num_frames) {
+  max_frames_in_stack_trace.store(max_num_frames, std::memory_order_release);
+}
+
+bool ExitOnDFatal() { return exit_on_dfatal.load(std::memory_order_acquire); }
+
+void SetExitOnDFatal(bool on_off) {
+  exit_on_dfatal.store(on_off, std::memory_order_release);
+}
+
+bool SuppressSigabortTrace() {
+  return suppress_sigabort_trace.load(std::memory_order_acquire);
+}
+
+bool SetSuppressSigabortTrace(bool on_off) {
+  return suppress_sigabort_trace.exchange(on_off);
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/globals.h b/third_party/abseil-cpp/absl/log/internal/globals.h
new file mode 100644
index 0000000000..27bc0d0984
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/globals.h
@@ -0,0 +1,101 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/globals.h
+// -----------------------------------------------------------------------------
+//
+// This header file contains various global objects and static helper routines
+// use in logging implementation.
+
+#ifndef ABSL_LOG_INTERNAL_GLOBALS_H_
+#define ABSL_LOG_INTERNAL_GLOBALS_H_
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// IsInitialized returns true if the logging library is initialized.
+// This function is async-signal-safe
+bool IsInitialized();
+
+// SetLoggingInitialized is called once after logging initialization is done.
+void SetInitialized();
+
+// Unconditionally write a `message` to stderr. If `severity` exceeds kInfo
+// we also flush the stderr stream.
+void WriteToStderr(absl::string_view message, absl::LogSeverity severity);
+
+// Set the TimeZone used for human-friendly times (for example, the log message
+// prefix) printed by the logging library. This may only be called once.
+void SetTimeZone(absl::TimeZone tz);
+
+// Returns the TimeZone used for human-friendly times (for example, the log
+// message prefix) printed by the logging library Returns nullptr prior to
+// initialization.
+const absl::TimeZone* TimeZone();
+
+// Returns true if stack traces emitted by the logging library should be
+// symbolized. This function is async-signal-safe.
+bool ShouldSymbolizeLogStackTrace();
+
+// Enables or disables symbolization of stack traces emitted by the
+// logging library. This function is async-signal-safe.
+void EnableSymbolizeLogStackTrace(bool on_off);
+
+// Returns the maximum number of frames that appear in stack traces
+// emitted by the logging library. This function is async-signal-safe.
+int MaxFramesInLogStackTrace();
+
+// Sets the maximum number of frames that appear in stack traces emitted by
+// the logging library. This function is async-signal-safe.
+void SetMaxFramesInLogStackTrace(int max_num_frames);
+
+// Determines whether we exit the program for a LOG(DFATAL) message in
+// debug mode.  It does this by skipping the call to Fail/FailQuietly.
+// This is intended for testing only.
+//
+// This can have some effects on LOG(FATAL) as well. Failure messages
+// are always allocated (rather than sharing a buffer), the crash
+// reason is not recorded, the "gwq" status message is not updated,
+// and the stack trace is not recorded.  The LOG(FATAL) *will* still
+// exit the program. Since this function is used only in testing,
+// these differences are acceptable.
+//
+// Additionally, LOG(LEVEL(FATAL)) is indistinguishable from LOG(DFATAL) and
+// will not terminate the program if SetExitOnDFatal(false) has been called.
+bool ExitOnDFatal();
+
+// SetExitOnDFatal() sets the ExitOnDFatal() status
+void SetExitOnDFatal(bool on_off);
+
+// Determines if the logging library should suppress logging of stacktraces in
+// the `SIGABRT` handler, typically because we just logged a stacktrace as part
+// of `LOG(FATAL)` and are about to send ourselves a `SIGABRT` to end the
+// program.
+bool SuppressSigabortTrace();
+
+// Sets the SuppressSigabortTrace() status and returns the previous state.
+bool SetSuppressSigabortTrace(bool on_off);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_GLOBALS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/log_format.cc b/third_party/abseil-cpp/absl/log/internal/log_format.cc
new file mode 100644
index 0000000000..5b280a2d21
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/log_format.cc
@@ -0,0 +1,209 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/log_format.h"
+
+#include <string.h>
+
+#ifdef _MSC_VER
+#include <winsock2.h>  // For timeval
+#else
+#include <sys/time.h>
+#endif
+
+#include <cstddef>
+#include <cstdint>
+#include <limits>
+#include <string>
+#include <type_traits>
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/base/optimization.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/globals.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/civil_time.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+// This templated function avoids compiler warnings about tautological
+// comparisons when log_internal::Tid is unsigned. It can be replaced with a
+// constexpr if once the minimum C++ version Abseil suppports is C++17.
+template <typename T>
+inline std::enable_if_t<!std::is_signed<T>::value>
+PutLeadingWhitespace(T tid, char*& p) {
+  if (tid < 10) *p++ = ' ';
+  if (tid < 100) *p++ = ' ';
+  if (tid < 1000) *p++ = ' ';
+  if (tid < 10000) *p++ = ' ';
+  if (tid < 100000) *p++ = ' ';
+  if (tid < 1000000) *p++ = ' ';
+}
+
+template <typename T>
+inline std::enable_if_t<std::is_signed<T>::value>
+PutLeadingWhitespace(T tid, char*& p) {
+  if (tid >= 0 && tid < 10) *p++ = ' ';
+  if (tid > -10 && tid < 100) *p++ = ' ';
+  if (tid > -100 && tid < 1000) *p++ = ' ';
+  if (tid > -1000 && tid < 10000) *p++ = ' ';
+  if (tid > -10000 && tid < 100000) *p++ = ' ';
+  if (tid > -100000 && tid < 1000000) *p++ = ' ';
+}
+
+// The fields before the filename are all fixed-width except for the thread ID,
+// which is of bounded width.
+size_t FormatBoundedFields(absl::LogSeverity severity, absl::Time timestamp,
+                           log_internal::Tid tid, absl::Span<char>& buf) {
+  constexpr size_t kBoundedFieldsMaxLen =
+      sizeof("SMMDD HH:MM:SS.NNNNNN  ") +
+      (1 + std::numeric_limits<log_internal::Tid>::digits10 + 1) - sizeof("");
+  if (ABSL_PREDICT_FALSE(buf.size() < kBoundedFieldsMaxLen)) {
+    // We don't bother trying to truncate these fields if the buffer is too
+    // short (or almost too short) because it would require doing a lot more
+    // length checking (slow) and it should never happen.  A 15kB buffer should
+    // be enough for anyone.  Instead we mark `buf` full without writing
+    // anything.
+    buf.remove_suffix(buf.size());
+    return 0;
+  }
+
+  // We can't call absl::LocalTime(), localtime_r(), or anything else here that
+  // isn't async-signal-safe. We can only use the time zone if it has already
+  // been loaded.
+  const absl::TimeZone* tz = absl::log_internal::TimeZone();
+  if (ABSL_PREDICT_FALSE(tz == nullptr)) {
+    // If a time zone hasn't been set yet because we are logging before the
+    // logging library has been initialized, we fallback to a simpler, slower
+    // method. Just report the raw Unix time in seconds. We cram this into the
+    // normal time format for the benefit of parsers.
+    auto tv = absl::ToTimeval(timestamp);
+    int snprintf_result = absl::SNPrintF(
+        buf.data(), buf.size(), "%c0000 00:00:%02d.%06d %7d ",
+        absl::LogSeverityName(severity)[0], static_cast<int>(tv.tv_sec),
+        static_cast<int>(tv.tv_usec), static_cast<int>(tid));
+    if (snprintf_result >= 0) {
+      buf.remove_prefix(static_cast<size_t>(snprintf_result));
+      return static_cast<size_t>(snprintf_result);
+    }
+    return 0;
+  }
+
+  char* p = buf.data();
+  *p++ = absl::LogSeverityName(severity)[0];
+  const absl::TimeZone::CivilInfo ci = tz->At(timestamp);
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(ci.cs.month()), p);
+  p += 2;
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(ci.cs.day()), p);
+  p += 2;
+  *p++ = ' ';
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(ci.cs.hour()), p);
+  p += 2;
+  *p++ = ':';
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(ci.cs.minute()), p);
+  p += 2;
+  *p++ = ':';
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(ci.cs.second()), p);
+  p += 2;
+  *p++ = '.';
+  const int64_t usecs = absl::ToInt64Microseconds(ci.subsecond);
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(usecs / 10000), p);
+  p += 2;
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(usecs / 100 % 100),
+                                       p);
+  p += 2;
+  absl::numbers_internal::PutTwoDigits(static_cast<size_t>(usecs % 100), p);
+  p += 2;
+  *p++ = ' ';
+  PutLeadingWhitespace(tid, p);
+  p = absl::numbers_internal::FastIntToBuffer(tid, p);
+  *p++ = ' ';
+  const size_t bytes_formatted = static_cast<size_t>(p - buf.data());
+  buf.remove_prefix(bytes_formatted);
+  return bytes_formatted;
+}
+
+// Copies into `dst` as many bytes of `src` as will fit, then advances `dst`
+// past the copied bytes and returns the number of bytes written.
+size_t AppendTruncated(absl::string_view src, absl::Span<char>& dst) {
+  if (src.size() > dst.size()) src = src.substr(0, dst.size());
+  memcpy(dst.data(), src.data(), src.size());
+  dst.remove_prefix(src.size());
+  return src.size();
+}
+
+size_t FormatLineNumber(int line, absl::Span<char>& buf) {
+  constexpr size_t kLineFieldMaxLen =
+      sizeof(":] ") + (1 + std::numeric_limits<int>::digits10 + 1) - sizeof("");
+  if (ABSL_PREDICT_FALSE(buf.size() < kLineFieldMaxLen)) {
+    // As above, we don't bother trying to truncate this if the buffer is too
+    // short and it should never happen.
+    buf.remove_suffix(buf.size());
+    return 0;
+  }
+  char* p = buf.data();
+  *p++ = ':';
+  p = absl::numbers_internal::FastIntToBuffer(line, p);
+  *p++ = ']';
+  *p++ = ' ';
+  const size_t bytes_formatted = static_cast<size_t>(p - buf.data());
+  buf.remove_prefix(bytes_formatted);
+  return bytes_formatted;
+}
+
+}  // namespace
+
+std::string FormatLogMessage(absl::LogSeverity severity,
+                             absl::CivilSecond civil_second,
+                             absl::Duration subsecond, log_internal::Tid tid,
+                             absl::string_view basename, int line,
+                             absl::string_view message) {
+  return absl::StrFormat(
+      "%c%02d%02d %02d:%02d:%02d.%06d %7d %s:%d] %s",
+      absl::LogSeverityName(severity)[0], civil_second.month(),
+      civil_second.day(), civil_second.hour(), civil_second.minute(),
+      civil_second.second(), absl::ToInt64Microseconds(subsecond), tid,
+      basename, line, message);
+}
+
+// This method is fairly hot, and the library always passes a huge `buf`, so we
+// save some bounds-checking cycles by not trying to do precise truncation.
+// Truncating at a field boundary is probably a better UX anyway.
+//
+// The prefix is written in three parts, each of which does a single
+// bounds-check and truncation:
+// 1. severity, timestamp, and thread ID
+// 2. filename
+// 3. line number and bracket
+size_t FormatLogPrefix(absl::LogSeverity severity, absl::Time timestamp,
+                       log_internal::Tid tid, absl::string_view basename,
+                       int line, absl::Span<char>& buf) {
+  auto prefix_size = FormatBoundedFields(severity, timestamp, tid, buf);
+  prefix_size += AppendTruncated(basename, buf);
+  prefix_size += FormatLineNumber(line, buf);
+  return prefix_size;
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/log_format.h b/third_party/abseil-cpp/absl/log/internal/log_format.h
new file mode 100644
index 0000000000..a016328fec
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/log_format.h
@@ -0,0 +1,73 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/log_format.h
+// -----------------------------------------------------------------------------
+//
+// This file declares routines implementing formatting of log message and log
+// prefix.
+
+#ifndef ABSL_LOG_INTERNAL_LOG_FORMAT_H_
+#define ABSL_LOG_INTERNAL_LOG_FORMAT_H_
+
+#include <stddef.h>
+
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/config.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/civil_time.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Formats log message based on provided data.
+std::string FormatLogMessage(absl::LogSeverity severity,
+                             absl::CivilSecond civil_second,
+                             absl::Duration subsecond, log_internal::Tid tid,
+                             absl::string_view basename, int line,
+                             absl::string_view message);
+
+// Formats various entry metadata into a text string meant for use as a
+// prefix on a log message string.  Writes into `buf`, advances `buf` to point
+// at the remainder of the buffer (i.e. past any written bytes), and returns the
+// number of bytes written.
+//
+// In addition to calling `buf->remove_prefix()` (or the equivalent), this
+// function may also do `buf->remove_suffix(buf->size())` in cases where no more
+// bytes (i.e. no message data) should be written into the buffer.  For example,
+// if the prefix ought to be:
+//   I0926 09:00:00.000000 1234567 foo.cc:123]
+// `buf` is too small, the function might fill the whole buffer:
+//   I0926 09:00:00.000000 1234
+// (note the apparrently incorrect thread ID), or it might write less:
+//   I0926 09:00:00.000000
+// In this case, it might also empty `buf` prior to returning to prevent
+// message data from being written into the space where a reader would expect to
+// see a thread ID.
+size_t FormatLogPrefix(absl::LogSeverity severity, absl::Time timestamp,
+                       log_internal::Tid tid, absl::string_view basename,
+                       int line, absl::Span<char>& buf);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_LOG_FORMAT_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/log_message.cc b/third_party/abseil-cpp/absl/log/internal/log_message.cc
new file mode 100644
index 0000000000..82833af0a3
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/log_message.cc
@@ -0,0 +1,511 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/log_message.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef _WIN32
+#include <unistd.h>
+#endif
+
+#include <algorithm>
+#include <array>
+#include <atomic>
+#include <memory>
+#include <ostream>
+#include <string>
+#include <tuple>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/internal/strerror.h"
+#include "absl/base/internal/sysinfo.h"
+#include "absl/base/log_severity.h"
+#include "absl/container/inlined_vector.h"
+#include "absl/debugging/internal/examine_stack.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/globals.h"
+#include "absl/log/internal/log_format.h"
+#include "absl/log/internal/log_sink_set.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/log/log_sink_registry.h"
+#include "absl/memory/memory.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+extern "C" ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(
+    AbslInternalOnFatalLogMessage)(const absl::LogEntry&) {
+  // Default - Do nothing
+}
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+namespace {
+// Copies into `dst` as many bytes of `src` as will fit, then truncates the
+// copied bytes from the front of `dst` and returns the number of bytes written.
+size_t AppendTruncated(absl::string_view src, absl::Span<char>* dst) {
+  if (src.size() > dst->size()) src = src.substr(0, dst->size());
+  memcpy(dst->data(), src.data(), src.size());
+  dst->remove_prefix(src.size());
+  return src.size();
+}
+
+absl::string_view Basename(absl::string_view filepath) {
+#ifdef _WIN32
+  size_t path = filepath.find_last_of("/\\");
+#else
+  size_t path = filepath.find_last_of('/');
+#endif
+  if (path != filepath.npos) filepath.remove_prefix(path + 1);
+  return filepath;
+}
+
+void WriteToString(const char* data, void* str) {
+  reinterpret_cast<std::string*>(str)->append(data);
+}
+void WriteToStream(const char* data, void* os) {
+  auto* cast_os = static_cast<std::ostream*>(os);
+  *cast_os << data;
+}
+}  // namespace
+
+// A write-only `std::streambuf` that writes into an `absl::Span<char>`.
+//
+// This class is responsible for writing a metadata prefix just before the first
+// data are streamed in.  The metadata are subject to change (cf.
+// `LogMessage::AtLocation`) until then, so we wait as long as possible.
+//
+// This class is also responsible for reserving space for a trailing newline
+// so that one can be added later by `Finalize` no matter how many data are
+// streamed in.
+class LogEntryStreambuf final : public std::streambuf {
+ public:
+  explicit LogEntryStreambuf(absl::Span<char> buf, const absl::LogEntry& entry)
+      : buf_(buf), entry_(entry), prefix_len_(0), finalized_(false) {
+    // To detect when data are first written, we leave the put area null,
+    // override `overflow`, and check ourselves in `xsputn`.
+  }
+
+  LogEntryStreambuf(LogEntryStreambuf&&) = delete;
+  LogEntryStreambuf& operator=(LogEntryStreambuf&&) = delete;
+
+  absl::Span<const char> Finalize() {
+    assert(!finalized_);
+    // If no data were ever streamed in, this is where we must write the prefix.
+    if (pbase() == nullptr) Initialize();
+    // Here we reclaim the two bytes we reserved.
+    ptrdiff_t idx = pptr() - pbase();
+    setp(buf_.data(), buf_.data() + buf_.size());
+    pbump(static_cast<int>(idx));
+    sputc('\n');
+    sputc('\0');
+    finalized_ = true;
+    return absl::Span<const char>(pbase(),
+                                  static_cast<size_t>(pptr() - pbase()));
+  }
+  size_t prefix_len() const { return prefix_len_; }
+
+ protected:
+  std::streamsize xsputn(const char* s, std::streamsize n) override {
+    if (n < 0) return 0;
+    if (pbase() == nullptr) Initialize();
+    return static_cast<std::streamsize>(
+        Append(absl::string_view(s, static_cast<size_t>(n))));
+  }
+
+  int overflow(int ch = EOF) override {
+    if (pbase() == nullptr) Initialize();
+    if (ch == EOF) return 0;
+    if (pptr() == epptr()) return EOF;
+    *pptr() = static_cast<char>(ch);
+    pbump(1);
+    return 1;
+  }
+
+ private:
+  void Initialize() {
+    // Here we reserve two bytes in our buffer to guarantee `Finalize` space to
+    // add a trailing "\n\0".
+    assert(buf_.size() >= 2);
+    setp(buf_.data(), buf_.data() + buf_.size() - 2);
+    if (entry_.prefix()) {
+      absl::Span<char> remaining = buf_;
+      prefix_len_ = log_internal::FormatLogPrefix(
+          entry_.log_severity(), entry_.timestamp(), entry_.tid(),
+          entry_.source_basename(), entry_.source_line(), remaining);
+      pbump(static_cast<int>(prefix_len_));
+    }
+  }
+
+  size_t Append(absl::string_view data) {
+    absl::Span<char> remaining(pptr(), static_cast<size_t>(epptr() - pptr()));
+    const size_t written = AppendTruncated(data, &remaining);
+    pbump(static_cast<int>(written));
+    return written;
+  }
+
+  const absl::Span<char> buf_;
+  const absl::LogEntry& entry_;
+  size_t prefix_len_;
+  bool finalized_;
+};
+
+struct LogMessage::LogMessageData final {
+  LogMessageData(const char* file, int line, absl::LogSeverity severity,
+                 absl::Time timestamp);
+  LogMessageData(const LogMessageData&) = delete;
+  LogMessageData& operator=(const LogMessageData&) = delete;
+
+  // `LogEntry` sent to `LogSink`s; contains metadata.
+  absl::LogEntry entry;
+
+  // true => this was first fatal msg
+  bool first_fatal;
+  // true => all failures should be quiet
+  bool fail_quietly;
+  // true => PLOG was requested
+  bool is_perror;
+
+  // Extra `LogSink`s to log to, in addition to `global_sinks`.
+  absl::InlinedVector<absl::LogSink*, 16> extra_sinks;
+  // If true, log to `extra_sinks` but not to `global_sinks` or hardcoded
+  // non-sink targets (e.g. stderr, log files).
+  bool extra_sinks_only;
+
+  // A formatted string message is built in `string_buf`.
+  std::array<char, kLogMessageBufferSize> string_buf;
+
+  // A `std::streambuf` that stores into `string_buf`.
+  LogEntryStreambuf streambuf_;
+};
+
+LogMessage::LogMessageData::LogMessageData(const char* file, int line,
+                                           absl::LogSeverity severity,
+                                           absl::Time timestamp)
+    : extra_sinks_only(false),
+      streambuf_(absl::MakeSpan(string_buf), entry) {
+  entry.full_filename_ = file;
+  entry.base_filename_ = Basename(file);
+  entry.line_ = line;
+  entry.prefix_ = absl::ShouldPrependLogPrefix();
+  entry.severity_ = absl::NormalizeLogSeverity(severity);
+  entry.verbose_level_ = absl::LogEntry::kNoVerbosityLevel;
+  entry.timestamp_ = timestamp;
+  entry.tid_ = absl::base_internal::GetCachedTID();
+}
+
+LogMessage::LogMessage(const char* file, int line, absl::LogSeverity severity)
+    : data_(
+          absl::make_unique<LogMessageData>(file, line, severity, absl::Now()))
+      ,
+      stream_(&data_->streambuf_)
+{
+  data_->first_fatal = false;
+  data_->is_perror = false;
+  data_->fail_quietly = false;
+
+  // Legacy defaults for LOG's ostream:
+  stream_.setf(std::ios_base::showbase | std::ios_base::boolalpha);
+  // `fill('0')` is omitted here because its effects are very different without
+  // structured logging.  Resolution is tracked in b/111310488.
+
+  // This logs a backtrace even if the location is subsequently changed using
+  // AtLocation.  This quirk, and the behavior when AtLocation is called twice,
+  // are fixable but probably not worth fixing.
+  LogBacktraceIfNeeded();
+}
+
+LogMessage::~LogMessage() {
+#ifdef ABSL_MIN_LOG_LEVEL
+  if (data_->entry.log_severity() <
+          static_cast<absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) &&
+      data_->entry.log_severity() < absl::LogSeverity::kFatal) {
+    return;
+  }
+#endif
+  Flush();
+}
+
+LogMessage& LogMessage::AtLocation(absl::string_view file, int line) {
+  data_->entry.full_filename_ = file;
+  data_->entry.base_filename_ = Basename(file);
+  data_->entry.line_ = line;
+  LogBacktraceIfNeeded();
+  return *this;
+}
+
+LogMessage& LogMessage::NoPrefix() {
+  data_->entry.prefix_ = false;
+  return *this;
+}
+
+LogMessage& LogMessage::WithVerbosity(int verbose_level) {
+  if (verbose_level == absl::LogEntry::kNoVerbosityLevel) {
+    data_->entry.verbose_level_ = absl::LogEntry::kNoVerbosityLevel;
+  } else {
+    data_->entry.verbose_level_ = std::max(0, verbose_level);
+  }
+  return *this;
+}
+
+LogMessage& LogMessage::WithTimestamp(absl::Time timestamp) {
+  data_->entry.timestamp_ = timestamp;
+  return *this;
+}
+
+LogMessage& LogMessage::WithThreadID(absl::LogEntry::tid_t tid) {
+  data_->entry.tid_ = tid;
+  return *this;
+}
+
+LogMessage& LogMessage::WithMetadataFrom(const absl::LogEntry& entry) {
+  data_->entry.full_filename_ = entry.full_filename_;
+  data_->entry.base_filename_ = entry.base_filename_;
+  data_->entry.line_ = entry.line_;
+  data_->entry.prefix_ = entry.prefix_;
+  data_->entry.severity_ = entry.severity_;
+  data_->entry.verbose_level_ = entry.verbose_level_;
+  data_->entry.timestamp_ = entry.timestamp_;
+  data_->entry.tid_ = entry.tid_;
+  return *this;
+}
+
+LogMessage& LogMessage::WithPerror() {
+  data_->is_perror = true;
+  return *this;
+}
+
+LogMessage& LogMessage::ToSinkAlso(absl::LogSink* sink) {
+  ABSL_INTERNAL_CHECK(sink, "null LogSink*");
+  data_->extra_sinks.push_back(sink);
+  return *this;
+}
+
+LogMessage& LogMessage::ToSinkOnly(absl::LogSink* sink) {
+  ABSL_INTERNAL_CHECK(sink, "null LogSink*");
+  data_->extra_sinks.clear();
+  data_->extra_sinks.push_back(sink);
+  data_->extra_sinks_only = true;
+  return *this;
+}
+
+#ifdef __ELF__
+extern "C" void __gcov_dump() ABSL_ATTRIBUTE_WEAK;
+extern "C" void __gcov_flush() ABSL_ATTRIBUTE_WEAK;
+#endif
+
+void LogMessage::FailWithoutStackTrace() {
+  // Now suppress repeated trace logging:
+  log_internal::SetSuppressSigabortTrace(true);
+#if defined _DEBUG && defined COMPILER_MSVC
+  // When debugging on windows, avoid the obnoxious dialog.
+  __debugbreak();
+#endif
+
+#ifdef __ELF__
+  // For b/8737634, flush coverage if we are in coverage mode.
+  if (&__gcov_dump != nullptr) {
+    __gcov_dump();
+  } else if (&__gcov_flush != nullptr) {
+    __gcov_flush();
+  }
+#endif
+
+  abort();
+}
+
+void LogMessage::FailQuietly() {
+  // _exit. Calling abort() would trigger all sorts of death signal handlers
+  // and a detailed stack trace. Calling exit() would trigger the onexit
+  // handlers, including the heap-leak checker, which is guaranteed to fail in
+  // this case: we probably just new'ed the std::string that we logged.
+  // Anyway, if you're calling Fail or FailQuietly, you're trying to bail out
+  // of the program quickly, and it doesn't make much sense for FailQuietly to
+  // offer different guarantees about exit behavior than Fail does. (And as a
+  // consequence for QCHECK and CHECK to offer different exit behaviors)
+  _exit(1);
+}
+
+template LogMessage& LogMessage::operator<<(const char& v);
+template LogMessage& LogMessage::operator<<(const signed char& v);
+template LogMessage& LogMessage::operator<<(const unsigned char& v);
+template LogMessage& LogMessage::operator<<(const short& v);           // NOLINT
+template LogMessage& LogMessage::operator<<(const unsigned short& v);  // NOLINT
+template LogMessage& LogMessage::operator<<(const int& v);
+template LogMessage& LogMessage::operator<<(const unsigned int& v);
+template LogMessage& LogMessage::operator<<(const long& v);           // NOLINT
+template LogMessage& LogMessage::operator<<(const unsigned long& v);  // NOLINT
+template LogMessage& LogMessage::operator<<(const long long& v);      // NOLINT
+template LogMessage& LogMessage::operator<<(
+    const unsigned long long& v);  // NOLINT
+template LogMessage& LogMessage::operator<<(void* const& v);
+template LogMessage& LogMessage::operator<<(const void* const& v);
+template LogMessage& LogMessage::operator<<(const float& v);
+template LogMessage& LogMessage::operator<<(const double& v);
+template LogMessage& LogMessage::operator<<(const bool& v);
+template LogMessage& LogMessage::operator<<(const std::string& v);
+template LogMessage& LogMessage::operator<<(const absl::string_view& v);
+
+void LogMessage::Flush() {
+  if (data_->entry.log_severity() < absl::MinLogLevel())
+    return;
+
+  if (data_->is_perror) {
+    InternalStream() << ": " << absl::base_internal::StrError(errno_saver_())
+                     << " [" << errno_saver_() << "]";
+  }
+
+  // Have we already seen a fatal message?
+  ABSL_CONST_INIT static std::atomic_flag seen_fatal = ATOMIC_FLAG_INIT;
+  if (data_->entry.log_severity() == absl::LogSeverity::kFatal &&
+      absl::log_internal::ExitOnDFatal()) {
+    // Exactly one LOG(FATAL) message is responsible for aborting the process,
+    // even if multiple threads LOG(FATAL) concurrently.
+    data_->first_fatal = !seen_fatal.test_and_set(std::memory_order_relaxed);
+  }
+
+  data_->entry.text_message_with_prefix_and_newline_and_nul_ =
+      data_->streambuf_.Finalize();
+  data_->entry.prefix_len_ = data_->streambuf_.prefix_len();
+  SendToLog();
+}
+
+void LogMessage::SetFailQuietly() { data_->fail_quietly = true; }
+
+bool LogMessage::IsFatal() const {
+  return data_->entry.log_severity() == absl::LogSeverity::kFatal &&
+         absl::log_internal::ExitOnDFatal();
+}
+
+void LogMessage::PrepareToDie() {
+  // If we log a FATAL message, flush all the log destinations, then toss
+  // a signal for others to catch. We leave the logs in a state that
+  // someone else can use them (as long as they flush afterwards)
+  if (data_->first_fatal) {
+    // Notify observers about the upcoming fatal error.
+    ABSL_INTERNAL_C_SYMBOL(AbslInternalOnFatalLogMessage)(data_->entry);
+  }
+
+  if (!data_->fail_quietly) {
+    // Log the message first before we start collecting stack trace.
+    log_internal::LogToSinks(data_->entry, absl::MakeSpan(data_->extra_sinks),
+                             data_->extra_sinks_only);
+
+    // `DumpStackTrace` generates an empty string under MSVC.
+    // Adding the constant prefix here simplifies testing.
+    data_->entry.stacktrace_ = "*** Check failure stack trace: ***\n";
+    debugging_internal::DumpStackTrace(
+        0, log_internal::MaxFramesInLogStackTrace(),
+        log_internal::ShouldSymbolizeLogStackTrace(), WriteToString,
+        &data_->entry.stacktrace_);
+  }
+}
+
+void LogMessage::Die() {
+  absl::FlushLogSinks();
+
+  if (data_->fail_quietly) {
+    FailQuietly();
+  } else {
+    FailWithoutStackTrace();
+  }
+}
+
+void LogMessage::SendToLog() {
+  if (IsFatal()) PrepareToDie();
+  // Also log to all registered sinks, even if OnlyLogToStderr() is set.
+  log_internal::LogToSinks(data_->entry, absl::MakeSpan(data_->extra_sinks),
+                           data_->extra_sinks_only);
+  if (IsFatal()) Die();
+}
+
+void LogMessage::LogBacktraceIfNeeded() {
+  if (!absl::log_internal::IsInitialized()) return;
+
+  if (!absl::log_internal::ShouldLogBacktraceAt(data_->entry.source_basename(),
+                                                data_->entry.source_line()))
+    return;
+  stream_ << " (stacktrace:\n";
+  debugging_internal::DumpStackTrace(
+      1, log_internal::MaxFramesInLogStackTrace(),
+      log_internal::ShouldSymbolizeLogStackTrace(), WriteToStream, &stream_);
+  stream_ << ") ";
+}
+
+LogMessageFatal::LogMessageFatal(const char* file, int line)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {}
+
+LogMessageFatal::LogMessageFatal(const char* file, int line,
+                                 absl::string_view failure_msg)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {
+  *this << "Check failed: " << failure_msg << " ";
+}
+
+// ABSL_ATTRIBUTE_NORETURN doesn't seem to work on destructors with msvc, so
+// disable msvc's warning about the d'tor never returning.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4722)
+#endif
+LogMessageFatal::~LogMessageFatal() {
+  Flush();
+  FailWithoutStackTrace();
+}
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+LogMessageQuietlyFatal::LogMessageQuietlyFatal(const char* file, int line)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {
+  SetFailQuietly();
+}
+
+LogMessageQuietlyFatal::LogMessageQuietlyFatal(const char* file, int line,
+                                               absl::string_view failure_msg)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {
+  SetFailQuietly();
+  *this << "Check failed: " << failure_msg << " ";
+}
+
+// ABSL_ATTRIBUTE_NORETURN doesn't seem to work on destructors with msvc, so
+// disable msvc's warning about the d'tor never returning.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4722)
+#endif
+LogMessageQuietlyFatal::~LogMessageQuietlyFatal() {
+  Flush();
+  FailQuietly();
+}
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+}  // namespace log_internal
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/log_message.h b/third_party/abseil-cpp/absl/log/internal/log_message.h
new file mode 100644
index 0000000000..37a267c075
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/log_message.h
@@ -0,0 +1,287 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/log_message.h
+// -----------------------------------------------------------------------------
+//
+// This file declares `class absl::log_internal::LogMessage`. This class more or
+// less represents a particular log message. LOG/CHECK macros create a
+// temporary instance of `LogMessage` and then stream values to it.  At the end
+// of the LOG/CHECK statement, LogMessage instance goes out of scope and
+// `~LogMessage` directs the message to the registered log sinks.
+// Heap-allocation of `LogMessage` is unsupported.  Construction outside of a
+// `LOG` macro is unsupported.
+
+#ifndef ABSL_LOG_INTERNAL_LOG_MESSAGE_H_
+#define ABSL_LOG_INTERNAL_LOG_MESSAGE_H_
+
+#include <ios>
+#include <memory>
+#include <ostream>
+#include <streambuf>
+#include <string>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/errno_saver.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/nullguard.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+constexpr int kLogMessageBufferSize = 15000;
+
+class LogMessage {
+ public:
+  // Used for `LOG`.
+  LogMessage(const char* file, int line,
+             absl::LogSeverity severity) ABSL_ATTRIBUTE_COLD;
+  LogMessage(const LogMessage&) = delete;
+  LogMessage& operator=(const LogMessage&) = delete;
+  ~LogMessage() ABSL_ATTRIBUTE_COLD;
+
+  // Overrides the location inferred from the callsite.  The string pointed to
+  // by `file` must be valid until the end of the statement.
+  LogMessage& AtLocation(absl::string_view file, int line);
+  // Omits the prefix from this line.  The prefix includes metadata about the
+  // logged data such as source code location and timestamp.
+  LogMessage& NoPrefix();
+  // Sets the verbosity field of the logged message as if it was logged by
+  // `VLOG(verbose_level)`.  Unlike `VLOG`, this method does not affect
+  // evaluation of the statement when the specified `verbose_level` has been
+  // disabled.  The only effect is on `absl::LogSink` implementations which
+  // make use of the `absl::LogSink::verbosity()` value.  The value
+  // `absl::LogEntry::kNoVerbosityLevel` can be specified to mark the message
+  // not verbose.
+  LogMessage& WithVerbosity(int verbose_level);
+  // Uses the specified timestamp instead of one collected in the constructor.
+  LogMessage& WithTimestamp(absl::Time timestamp);
+  // Uses the specified thread ID instead of one collected in the constructor.
+  LogMessage& WithThreadID(absl::LogEntry::tid_t tid);
+  // Copies all metadata (but no data) from the specified `absl::LogEntry`.
+  LogMessage& WithMetadataFrom(const absl::LogEntry& entry);
+  // Appends to the logged message a colon, a space, a textual description of
+  // the current value of `errno` (as by strerror(3)), and the numerical value
+  // of `errno`.
+  LogMessage& WithPerror();
+  // Sends this message to `*sink` in addition to whatever other sinks it would
+  // otherwise have been sent to.  `sink` must not be null.
+  LogMessage& ToSinkAlso(absl::LogSink* sink);
+  // Sends this message to `*sink` and no others.  `sink` must not be null.
+  LogMessage& ToSinkOnly(absl::LogSink* sink);
+
+  // Don't call this method from outside this library.
+  LogMessage& InternalStream() { return *this; }
+
+  // By-value overloads for small, common types let us overlook common failures
+  // to define globals and static data members (i.e. in a .cc file).
+  // clang-format off
+  // The CUDA toolchain cannot handle these <<<'s:
+  LogMessage& operator<<(char v) { return operator<< <char>(v); }
+  LogMessage& operator<<(signed char v) { return operator<< <signed char>(v); }
+  LogMessage& operator<<(unsigned char v) {
+    return operator<< <unsigned char>(v);
+  }
+  LogMessage& operator<<(signed short v) {  // NOLINT
+    return operator<< <signed short>(v);  // NOLINT
+  }
+  LogMessage& operator<<(signed int v) { return operator<< <signed int>(v); }
+  LogMessage& operator<<(signed long v) {  // NOLINT
+    return operator<< <signed long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(signed long long v) {  // NOLINT
+    return operator<< <signed long long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(unsigned short v) {  // NOLINT
+    return operator<< <unsigned short>(v);  // NOLINT
+  }
+  LogMessage& operator<<(unsigned int v) {
+    return operator<< <unsigned int>(v);
+  }
+  LogMessage& operator<<(unsigned long v) {  // NOLINT
+    return operator<< <unsigned long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(unsigned long long v) {  // NOLINT
+    return operator<< <unsigned long long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(void* v) { return operator<< <void*>(v); }
+  LogMessage& operator<<(const void* v) { return operator<< <const void*>(v); }
+  LogMessage& operator<<(float v) { return operator<< <float>(v); }
+  LogMessage& operator<<(double v) { return operator<< <double>(v); }
+  LogMessage& operator<<(bool v) { return operator<< <bool>(v); }
+  // clang-format on
+
+  // Handle stream manipulators e.g. std::endl.
+  LogMessage& operator<<(std::ostream& (*m)(std::ostream& os));
+  LogMessage& operator<<(std::ios_base& (*m)(std::ios_base& os));
+
+  // Literal strings.  This allows us to record C string literals as literals in
+  // the logging.proto.Value.
+  //
+  // Allow this overload to be inlined to prevent generating instantiations of
+  // this template for every value of `SIZE` encountered in each source code
+  // file. That significantly increases linker input sizes. Inlining is cheap
+  // because the argument to this overload is almost always a string literal so
+  // the call to `strlen` can be replaced at compile time. The overload for
+  // `char[]` below should not be inlined. The compiler typically does not have
+  // the string at compile time and cannot replace the call to `strlen` so
+  // inlining it increases the binary size. See the discussion on
+  // cl/107527369.
+  template <int SIZE>
+  LogMessage& operator<<(const char (&buf)[SIZE]);
+
+  // This prevents non-const `char[]` arrays from looking like literals.
+  template <int SIZE>
+  LogMessage& operator<<(char (&buf)[SIZE]) ABSL_ATTRIBUTE_NOINLINE;
+
+  // Default: uses `ostream` logging to convert `v` to a string.
+  template <typename T>
+  LogMessage& operator<<(const T& v) ABSL_ATTRIBUTE_NOINLINE;
+
+  // Note: We explicitly do not support `operator<<` for non-const references
+  // because it breaks logging of non-integer bitfield types (i.e., enums).
+
+ protected:
+  // Call `abort()` or similar to perform `LOG(FATAL)` crash.  It is assumed
+  // that the caller has already generated and written the trace as appropriate.
+  ABSL_ATTRIBUTE_NORETURN static void FailWithoutStackTrace();
+
+  // Similar to `FailWithoutStackTrace()`, but without `abort()`.  Terminates
+  // the process with an error exit code.
+  ABSL_ATTRIBUTE_NORETURN static void FailQuietly();
+
+  // Dispatches the completed `absl::LogEntry` to applicable `absl::LogSink`s.
+  // This might as well be inlined into `~LogMessage` except that
+  // `~LogMessageFatal` needs to call it early.
+  void Flush();
+
+  // After this is called, failures are done as quiet as possible for this log
+  // message.
+  void SetFailQuietly();
+
+ private:
+  struct LogMessageData;  // Opaque type containing message state
+
+  // Returns `true` if the message is fatal or enabled debug-fatal.
+  bool IsFatal() const;
+
+  // Records some tombstone-type data in anticipation of `Die`.
+  void PrepareToDie();
+  void Die();
+
+  void SendToLog();
+
+  // Checks `FLAGS_log_backtrace_at` and appends a backtrace if appropriate.
+  void LogBacktraceIfNeeded();
+
+  // This should be the first data member so that its initializer captures errno
+  // before any other initializers alter it (e.g. with calls to new) and so that
+  // no other destructors run afterward an alter it (e.g. with calls to delete).
+  absl::base_internal::ErrnoSaver errno_saver_;
+
+  // We keep the data in a separate struct so that each instance of `LogMessage`
+  // uses less stack space.
+  std::unique_ptr<LogMessageData> data_;
+
+  std::ostream stream_;
+};
+
+// Note: the following is declared `ABSL_ATTRIBUTE_NOINLINE`
+template <typename T>
+LogMessage& LogMessage::operator<<(const T& v) {
+  stream_ << log_internal::NullGuard<T>().Guard(v);
+  return *this;
+}
+inline LogMessage& LogMessage::operator<<(
+    std::ostream& (*m)(std::ostream& os)) {
+  stream_ << m;
+  return *this;
+}
+inline LogMessage& LogMessage::operator<<(
+    std::ios_base& (*m)(std::ios_base& os)) {
+  stream_ << m;
+  return *this;
+}
+template <int SIZE>
+LogMessage& LogMessage::operator<<(const char (&buf)[SIZE]) {
+  stream_ << buf;
+  return *this;
+}
+// Note: the following is declared `ABSL_ATTRIBUTE_NOINLINE`
+template <int SIZE>
+LogMessage& LogMessage::operator<<(char (&buf)[SIZE]) {
+  stream_ << buf;
+  return *this;
+}
+// We instantiate these specializations in the library's TU to save space in
+// other TUs.  Since the template is marked `ABSL_ATTRIBUTE_NOINLINE` we will be
+// emitting a function call either way.
+extern template LogMessage& LogMessage::operator<<(const char& v);
+extern template LogMessage& LogMessage::operator<<(const signed char& v);
+extern template LogMessage& LogMessage::operator<<(const unsigned char& v);
+extern template LogMessage& LogMessage::operator<<(const short& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned short& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(const int& v);
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned int& v);                                         // NOLINT
+extern template LogMessage& LogMessage::operator<<(const long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const long long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned long long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(void* const& v);
+extern template LogMessage& LogMessage::operator<<(const void* const& v);
+extern template LogMessage& LogMessage::operator<<(const float& v);
+extern template LogMessage& LogMessage::operator<<(const double& v);
+extern template LogMessage& LogMessage::operator<<(const bool& v);
+extern template LogMessage& LogMessage::operator<<(const std::string& v);
+extern template LogMessage& LogMessage::operator<<(const absl::string_view& v);
+
+// `LogMessageFatal` ensures the process will exit in failure after logging this
+// message.
+class LogMessageFatal final : public LogMessage {
+ public:
+  LogMessageFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
+  LogMessageFatal(const char* file, int line,
+                  absl::string_view failure_msg) ABSL_ATTRIBUTE_COLD;
+  ABSL_ATTRIBUTE_NORETURN ~LogMessageFatal();
+};
+
+class LogMessageQuietlyFatal final : public LogMessage {
+ public:
+  LogMessageQuietlyFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
+  LogMessageQuietlyFatal(const char* file, int line,
+                         absl::string_view failure_msg) ABSL_ATTRIBUTE_COLD;
+  ABSL_ATTRIBUTE_NORETURN ~LogMessageQuietlyFatal();
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+extern "C" ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(
+    AbslInternalOnFatalLogMessage)(const absl::LogEntry&);
+
+#endif  // ABSL_LOG_INTERNAL_LOG_MESSAGE_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/log_sink_set.cc b/third_party/abseil-cpp/absl/log/internal/log_sink_set.cc
new file mode 100644
index 0000000000..f9d030aa22
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/log_sink_set.cc
@@ -0,0 +1,296 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/log_sink_set.h"
+
+#ifndef ABSL_HAVE_THREAD_LOCAL
+#include <pthread.h>
+#endif
+
+#ifdef __ANDROID__
+#include <android/log.h>
+#endif
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+#include <algorithm>
+#include <vector>
+
+#include "absl/base/attributes.h"
+#include "absl/base/call_once.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/log_severity.h"
+#include "absl/base/thread_annotations.h"
+#include "absl/cleanup/cleanup.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/globals.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/strings/string_view.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+// Returns a mutable reference to a thread-local variable that should be true if
+// a globally-registered `LogSink`'s `Send()` is currently being invoked on this
+// thread.
+bool& ThreadIsLoggingStatus() {
+#ifdef ABSL_HAVE_THREAD_LOCAL
+  ABSL_CONST_INIT thread_local bool thread_is_logging = false;
+  return thread_is_logging;
+#else
+  ABSL_CONST_INIT static pthread_key_t thread_is_logging_key;
+  static const bool unused = [] {
+    if (pthread_key_create(&thread_is_logging_key, [](void* data) {
+          delete reinterpret_cast<bool*>(data);
+        })) {
+      perror("pthread_key_create failed!");
+      abort();
+    }
+    return true;
+  }();
+  (void)unused;  // Fixes -wunused-variable warning
+  bool* thread_is_logging_ptr =
+      reinterpret_cast<bool*>(pthread_getspecific(thread_is_logging_key));
+
+  if (ABSL_PREDICT_FALSE(!thread_is_logging_ptr)) {
+    thread_is_logging_ptr = new bool{false};
+    if (pthread_setspecific(thread_is_logging_key, thread_is_logging_ptr)) {
+      perror("pthread_setspecific failed");
+      abort();
+    }
+  }
+  return *thread_is_logging_ptr;
+#endif
+}
+
+class StderrLogSink final : public LogSink {
+ public:
+  ~StderrLogSink() override = default;
+
+  void Send(const absl::LogEntry& entry) override {
+    if (entry.log_severity() < absl::StderrThreshold() &&
+        absl::log_internal::IsInitialized()) {
+      return;
+    }
+
+    ABSL_CONST_INIT static absl::once_flag warn_if_not_initialized;
+    absl::call_once(warn_if_not_initialized, []() {
+      if (absl::log_internal::IsInitialized()) return;
+      const char w[] =
+          "WARNING: All log messages before absl::InitializeLog() is called"
+          " are written to STDERR\n";
+      absl::log_internal::WriteToStderr(w, absl::LogSeverity::kWarning);
+    });
+
+    if (!entry.stacktrace().empty()) {
+      absl::log_internal::WriteToStderr(entry.stacktrace(),
+                                        entry.log_severity());
+    } else {
+      // TODO(b/226937039): do this outside else condition once we avoid
+      // ReprintFatalMessage
+      absl::log_internal::WriteToStderr(
+          entry.text_message_with_prefix_and_newline(), entry.log_severity());
+    }
+  }
+};
+
+#if defined(__ANDROID__)
+class AndroidLogSink final : public LogSink {
+ public:
+  ~AndroidLogSink() override = default;
+
+  void Send(const absl::LogEntry& entry) override {
+    const int level = AndroidLogLevel(entry);
+    // TODO(b/37587197): make the tag ("native") configurable.
+    __android_log_write(level, "native",
+                        entry.text_message_with_prefix_and_newline_c_str());
+    if (entry.log_severity() == absl::LogSeverity::kFatal)
+      __android_log_write(ANDROID_LOG_FATAL, "native", "terminating.\n");
+  }
+
+ private:
+  static int AndroidLogLevel(const absl::LogEntry& entry) {
+    switch (entry.log_severity()) {
+      case absl::LogSeverity::kFatal:
+        return ANDROID_LOG_FATAL;
+      case absl::LogSeverity::kError:
+        return ANDROID_LOG_ERROR;
+      case absl::LogSeverity::kWarning:
+        return ANDROID_LOG_WARN;
+      default:
+        if (entry.verbosity() >= 2) return ANDROID_LOG_VERBOSE;
+        if (entry.verbosity() == 1) return ANDROID_LOG_DEBUG;
+        return ANDROID_LOG_INFO;
+    }
+  }
+};
+#endif  // !defined(__ANDROID__)
+
+#if defined(_WIN32)
+class WindowsDebuggerLogSink final : public LogSink {
+ public:
+  ~WindowsDebuggerLogSink() override = default;
+
+  void Send(const absl::LogEntry& entry) override {
+    if (entry.log_severity() < absl::StderrThreshold() &&
+        absl::log_internal::IsInitialized()) {
+      return;
+    }
+    ::OutputDebugStringA(entry.text_message_with_prefix_and_newline_c_str());
+  }
+};
+#endif  // !defined(_WIN32)
+
+class GlobalLogSinkSet final {
+ public:
+  GlobalLogSinkSet() {
+#if defined(__myriad2__) || defined(__Fuchsia__)
+    // myriad2 and Fuchsia do not log to stderr by default.
+#else
+    static StderrLogSink* stderr_log_sink = new StderrLogSink;
+    AddLogSink(stderr_log_sink);
+#endif
+#ifdef __ANDROID__
+    static AndroidLogSink* android_log_sink = new AndroidLogSink;
+    AddLogSink(android_log_sink);
+#endif
+#if defined(_WIN32)
+    static WindowsDebuggerLogSink* debugger_log_sink =
+        new WindowsDebuggerLogSink;
+    AddLogSink(debugger_log_sink);
+#endif  // !defined(_WIN32)
+  }
+
+  void LogToSinks(const absl::LogEntry& entry,
+                  absl::Span<absl::LogSink*> extra_sinks, bool extra_sinks_only)
+      ABSL_LOCKS_EXCLUDED(guard_) {
+    SendToSinks(entry, extra_sinks);
+
+    if (!extra_sinks_only) {
+      if (ThreadIsLoggingToLogSink()) {
+        absl::log_internal::WriteToStderr(
+            entry.text_message_with_prefix_and_newline(), entry.log_severity());
+      } else {
+        absl::ReaderMutexLock global_sinks_lock(&guard_);
+        ThreadIsLoggingStatus() = true;
+        // Ensure the "thread is logging" status is reverted upon leaving the
+        // scope even in case of exceptions.
+        auto status_cleanup =
+            absl::MakeCleanup([] { ThreadIsLoggingStatus() = false; });
+        SendToSinks(entry, absl::MakeSpan(sinks_));
+      }
+    }
+  }
+
+  void AddLogSink(absl::LogSink* sink) ABSL_LOCKS_EXCLUDED(guard_) {
+    {
+      absl::WriterMutexLock global_sinks_lock(&guard_);
+      auto pos = std::find(sinks_.begin(), sinks_.end(), sink);
+      if (pos == sinks_.end()) {
+        sinks_.push_back(sink);
+        return;
+      }
+    }
+    ABSL_INTERNAL_LOG(FATAL, "Duplicate log sinks are not supported");
+  }
+
+  void RemoveLogSink(absl::LogSink* sink) ABSL_LOCKS_EXCLUDED(guard_) {
+    {
+      absl::WriterMutexLock global_sinks_lock(&guard_);
+      auto pos = std::find(sinks_.begin(), sinks_.end(), sink);
+      if (pos != sinks_.end()) {
+        sinks_.erase(pos);
+        return;
+      }
+    }
+    ABSL_INTERNAL_LOG(FATAL, "Mismatched log sink being removed");
+  }
+
+  void FlushLogSinks() ABSL_LOCKS_EXCLUDED(guard_) {
+    if (ThreadIsLoggingToLogSink()) {
+      // The thread_local condition demonstrates that we're already holding the
+      // lock in order to iterate over `sinks_` for dispatch.  The thread-safety
+      // annotations don't know this, so we use `ABSL_NO_THREAD_SAFETY_ANALYSIS`
+      guard_.AssertReaderHeld();
+      FlushLogSinksLocked();
+    } else {
+      absl::ReaderMutexLock global_sinks_lock(&guard_);
+      // In case if LogSink::Flush overload decides to log
+      ThreadIsLoggingStatus() = true;
+      // Ensure the "thread is logging" status is reverted upon leaving the
+      // scope even in case of exceptions.
+      auto status_cleanup =
+          absl::MakeCleanup([] { ThreadIsLoggingStatus() = false; });
+      FlushLogSinksLocked();
+    }
+  }
+
+ private:
+  void FlushLogSinksLocked() ABSL_SHARED_LOCKS_REQUIRED(guard_) {
+    for (absl::LogSink* sink : sinks_) {
+      sink->Flush();
+    }
+  }
+
+  // Helper routine for LogToSinks.
+  static void SendToSinks(const absl::LogEntry& entry,
+                          absl::Span<absl::LogSink*> sinks) {
+    for (absl::LogSink* sink : sinks) {
+      sink->Send(entry);
+    }
+  }
+
+  using LogSinksSet = std::vector<absl::LogSink*>;
+  absl::Mutex guard_;
+  LogSinksSet sinks_ ABSL_GUARDED_BY(guard_);
+};
+
+// Returns reference to the global LogSinks set.
+GlobalLogSinkSet& GlobalSinks() {
+  static GlobalLogSinkSet* global_sinks = new GlobalLogSinkSet;
+  return *global_sinks;
+}
+
+}  // namespace
+
+bool ThreadIsLoggingToLogSink() { return ThreadIsLoggingStatus(); }
+
+void LogToSinks(const absl::LogEntry& entry,
+                absl::Span<absl::LogSink*> extra_sinks, bool extra_sinks_only) {
+  log_internal::GlobalSinks().LogToSinks(entry, extra_sinks, extra_sinks_only);
+}
+
+void AddLogSink(absl::LogSink* sink) {
+  log_internal::GlobalSinks().AddLogSink(sink);
+}
+
+void RemoveLogSink(absl::LogSink* sink) {
+  log_internal::GlobalSinks().RemoveLogSink(sink);
+}
+
+void FlushLogSinks() { log_internal::GlobalSinks().FlushLogSinks(); }
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/log_sink_set.h b/third_party/abseil-cpp/absl/log/internal/log_sink_set.h
new file mode 100644
index 0000000000..88ab073bbd
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/log_sink_set.h
@@ -0,0 +1,54 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/log_sink_set.h
+// -----------------------------------------------------------------------------
+
+#ifndef ABSL_LOG_INTERNAL_LOG_SINK_SET_H_
+#define ABSL_LOG_INTERNAL_LOG_SINK_SET_H_
+
+#include "absl/base/config.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Returns true if a globally-registered `LogSink`'s `Send()` is currently
+// being invoked on this thread.
+bool ThreadIsLoggingToLogSink();
+
+// This function may log to two sets of sinks:
+//
+// * If `extra_sinks_only` is true, it will dispatch only to `extra_sinks`.
+//   `LogMessage::ToSinkAlso` and `LogMessage::ToSinkOnly` are used to attach
+//    extra sinks to the entry.
+// * Otherwise it will also log to the global sinks set. This set is managed
+//   by `absl::AddLogSink` and `absl::RemoveLogSink`.
+void LogToSinks(const absl::LogEntry& entry,
+                absl::Span<absl::LogSink*> extra_sinks, bool extra_sinks_only);
+
+// Implementation for operations with log sink set.
+void AddLogSink(absl::LogSink* sink);
+void RemoveLogSink(absl::LogSink* sink);
+void FlushLogSinks();
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_LOG_SINK_SET_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/nullguard.h b/third_party/abseil-cpp/absl/log/internal/nullguard.h
new file mode 100644
index 0000000000..147ca8145c
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/nullguard.h
@@ -0,0 +1,56 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/nullguard.h
+// -----------------------------------------------------------------------------
+//
+// NullGuard exists such that NullGuard<T>::Guard(v) returns v, unless passed a
+// nullptr_t, or a null char* or const char*, in which case it returns "(null)".
+// This allows streaming NullGuard<T>::Guard(v) to an output stream without
+// hitting undefined behavior for null values.
+
+#ifndef ABSL_LOG_INTERNAL_NULLGUARD_H_
+#define ABSL_LOG_INTERNAL_NULLGUARD_H_
+
+#include <cstddef>
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+template <typename T>
+struct NullGuard final {
+  static const T& Guard(const T& v) { return v; }
+};
+template <>
+struct NullGuard<char*> final {
+  static const char* Guard(const char* v) { return v ? v : "(null)"; }
+};
+template <>
+struct NullGuard<const char*> final {
+  static const char* Guard(const char* v) { return v ? v : "(null)"; }
+};
+template <>
+struct NullGuard<std::nullptr_t> final {
+  static const char* Guard(const std::nullptr_t&) { return "(null)"; }
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_NULLGUARD_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/nullstream.h b/third_party/abseil-cpp/absl/log/internal/nullstream.h
new file mode 100644
index 0000000000..80c62c9e73
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/nullstream.h
@@ -0,0 +1,134 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/nullstream.h
+// -----------------------------------------------------------------------------
+//
+// Classes `NullStream`, `NullStreamMaybeFatal ` and `NullStreamFatal`
+// implement a subset of the `LogMessage` API and are used instead when logging
+// of messages has been disabled.
+
+#ifndef ABSL_LOG_INTERNAL_NULLSTREAM_H_
+#define ABSL_LOG_INTERNAL_NULLSTREAM_H_
+
+#ifdef _WIN32
+#include <cstdlib>
+#else
+#include <unistd.h>
+#endif
+#include <ios>
+#include <ostream>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// A `NullStream` implements the API of `LogMessage` (a few methods and
+// `operator<<`) but does nothing.  All methods are defined inline so the
+// compiler can eliminate the whole instance and discard anything that's
+// streamed in.
+class NullStream {
+ public:
+  NullStream& AtLocation(absl::string_view, int) { return *this; }
+  template <typename SourceLocationType>
+  NullStream& AtLocation(SourceLocationType) {
+    return *this;
+  }
+  NullStream& NoPrefix() { return *this; }
+  NullStream& WithVerbosity(int) { return *this; }
+  template <typename TimeType>
+  NullStream& WithTimestamp(TimeType) {
+    return *this;
+  }
+  template <typename Tid>
+  NullStream& WithThreadID(Tid) {
+    return *this;
+  }
+  template <typename LogEntryType>
+  NullStream& WithMetadataFrom(const LogEntryType&) {
+    return *this;
+  }
+  NullStream& WithPerror() { return *this; }
+  template <typename LogSinkType>
+  NullStream& ToSinkAlso(LogSinkType*) {
+    return *this;
+  }
+  template <typename LogSinkType>
+  NullStream& ToSinkOnly(LogSinkType*) {
+    return *this;
+  }
+  template <typename LogSinkType>
+  NullStream& OutputToSink(LogSinkType*, bool) {
+    return *this;
+  }
+  NullStream& InternalStream() { return *this; }
+};
+template <typename T>
+inline NullStream& operator<<(NullStream& str, const T&) {
+  return str;
+}
+inline NullStream& operator<<(NullStream& str,
+                              std::ostream& (*)(std::ostream& os)) {
+  return str;
+}
+inline NullStream& operator<<(NullStream& str,
+                              std::ios_base& (*)(std::ios_base& os)) {
+  return str;
+}
+
+// `NullStreamMaybeFatal` implements the process termination semantics of
+// `LogMessage`, which is used for `DFATAL` severity and expression-defined
+// severity e.g. `LOG(LEVEL(HowBadIsIt()))`.  Like `LogMessage`, it terminates
+// the process when destroyed if the passed-in severity equals `FATAL`.
+class NullStreamMaybeFatal final : public NullStream {
+ public:
+  explicit NullStreamMaybeFatal(absl::LogSeverity severity)
+      : fatal_(severity == absl::LogSeverity::kFatal) {}
+  ~NullStreamMaybeFatal() {
+    if (fatal_) _exit(1);
+  }
+
+ private:
+  bool fatal_;
+};
+
+// `NullStreamFatal` implements the process termination semantics of
+// `LogMessageFatal`, which means it always terminates the process.  `DFATAL`
+// and expression-defined severity use `NullStreamMaybeFatal` above.
+class NullStreamFatal final : public NullStream {
+ public:
+  NullStreamFatal() {}
+  // ABSL_ATTRIBUTE_NORETURN doesn't seem to work on destructors with msvc, so
+  // disable msvc's warning about the d'tor never returning.
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4722)
+#endif
+  ABSL_ATTRIBUTE_NORETURN ~NullStreamFatal() { _exit(1); }
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_GLOBALS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/stderr_log_sink_test.cc b/third_party/abseil-cpp/absl/log/internal/stderr_log_sink_test.cc
new file mode 100644
index 0000000000..763690d1b3
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/stderr_log_sink_test.cc
@@ -0,0 +1,105 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdlib.h>
+
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/log.h"
+
+namespace {
+using ::testing::AllOf;
+using ::testing::HasSubstr;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+MATCHER_P2(HasSubstrTimes, substr, expected_count, "") {
+  int count = 0;
+  std::string::size_type pos = 0;
+  std::string needle(substr);
+  while ((pos = arg.find(needle, pos)) != std::string::npos) {
+    ++count;
+    pos += needle.size();
+  }
+
+  return count == expected_count;
+}
+
+TEST(StderrLogSinkDeathTest, InfoMessagesInStderr) {
+  EXPECT_DEATH_IF_SUPPORTED(
+      {
+        absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
+        LOG(INFO) << "INFO message";
+        exit(1);
+      },
+      "INFO message");
+}
+
+TEST(StderrLogSinkDeathTest, WarningMessagesInStderr) {
+  EXPECT_DEATH_IF_SUPPORTED(
+      {
+        absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
+        LOG(WARNING) << "WARNING message";
+        exit(1);
+      },
+      "WARNING message");
+}
+
+TEST(StderrLogSinkDeathTest, ErrorMessagesInStderr) {
+  EXPECT_DEATH_IF_SUPPORTED(
+      {
+        absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
+        LOG(ERROR) << "ERROR message";
+        exit(1);
+      },
+      "ERROR message");
+}
+
+TEST(StderrLogSinkDeathTest, FatalMessagesInStderr) {
+  char message[] = "FATAL message";
+  char stacktrace[] = "*** Check failure stack trace: ***";
+
+  int expected_count = 1;
+
+  EXPECT_DEATH_IF_SUPPORTED(
+      {
+        absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
+        LOG(FATAL) << message;
+      },
+      AllOf(HasSubstrTimes(message, expected_count), HasSubstr(stacktrace)));
+}
+
+TEST(StderrLogSinkDeathTest, SecondaryFatalMessagesInStderr) {
+  auto MessageGen = []() -> std::string {
+    LOG(FATAL) << "Internal failure";
+    return "External failure";
+  };
+
+  EXPECT_DEATH_IF_SUPPORTED(
+      {
+        absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
+        LOG(FATAL) << MessageGen();
+      },
+      "Internal failure");
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/internal/strip.h b/third_party/abseil-cpp/absl/log/internal/strip.h
new file mode 100644
index 0000000000..848c38672d
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/strip.h
@@ -0,0 +1,71 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/strip.h
+// -----------------------------------------------------------------------------
+//
+
+#ifndef ABSL_LOG_INTERNAL_STRIP_H_
+#define ABSL_LOG_INTERNAL_STRIP_H_
+
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/log_message.h"
+#include "absl/log/internal/nullstream.h"
+
+// `ABSL_LOGGING_INTERNAL_LOG_*` evaluates to a temporary `LogMessage` object or
+// to a related object with a compatible API but different behavior.  This set
+// of defines comes in three flavors: vanilla, plus two variants that strip some
+// logging in subtly different ways for subtly different reasons (see below).
+#if defined(STRIP_LOG) && STRIP_LOG
+#define ABSL_LOGGING_INTERNAL_LOG_INFO ::absl::log_internal::NullStream()
+#define ABSL_LOGGING_INTERNAL_LOG_WARNING ::absl::log_internal::NullStream()
+#define ABSL_LOGGING_INTERNAL_LOG_ERROR ::absl::log_internal::NullStream()
+#define ABSL_LOGGING_INTERNAL_LOG_FATAL ::absl::log_internal::NullStreamFatal()
+#define ABSL_LOGGING_INTERNAL_LOG_QFATAL ::absl::log_internal::NullStreamFatal()
+#define ABSL_LOGGING_INTERNAL_LOG_DFATAL \
+  ::absl::log_internal::NullStreamMaybeFatal(::absl::kLogDebugFatal)
+#define ABSL_LOGGING_INTERNAL_LOG_LEVEL(severity) \
+  ::absl::log_internal::NullStreamMaybeFatal(log_internal_severity)
+#define ABSL_LOG_INTERNAL_CHECK(failure_message) ABSL_LOGGING_INTERNAL_LOG_FATAL
+#define ABSL_LOG_INTERNAL_QCHECK(failure_message) \
+  ABSL_LOGGING_INTERNAL_LOG_QFATAL
+#else  // !defined(STRIP_LOG) || !STRIP_LOG
+#define ABSL_LOGGING_INTERNAL_LOG_INFO                 \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, \
+                                   ::absl::LogSeverity::kInfo)
+#define ABSL_LOGGING_INTERNAL_LOG_WARNING              \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, \
+                                   ::absl::LogSeverity::kWarning)
+#define ABSL_LOGGING_INTERNAL_LOG_ERROR                \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, \
+                                   ::absl::LogSeverity::kError)
+#define ABSL_LOGGING_INTERNAL_LOG_FATAL \
+  ::absl::log_internal::LogMessageFatal(__FILE__, __LINE__)
+#define ABSL_LOGGING_INTERNAL_LOG_QFATAL \
+  ::absl::log_internal::LogMessageQuietlyFatal(__FILE__, __LINE__)
+#define ABSL_LOGGING_INTERNAL_LOG_DFATAL \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, ::absl::kLogDebugFatal)
+#define ABSL_LOGGING_INTERNAL_LOG_LEVEL(severity) \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, log_internal_severity)
+// These special cases dispatch to special-case constructors that allow us to
+// avoid an extra function call and shrink non-LTO binaries by a percent or so.
+#define ABSL_LOG_INTERNAL_CHECK(failure_message) \
+  ::absl::log_internal::LogMessageFatal(__FILE__, __LINE__, failure_message)
+#define ABSL_LOG_INTERNAL_QCHECK(failure_message)                  \
+  ::absl::log_internal::LogMessageQuietlyFatal(__FILE__, __LINE__, \
+                                               failure_message)
+#endif  // !defined(STRIP_LOG) || !STRIP_LOG
+
+#endif  // ABSL_LOG_INTERNAL_STRIP_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/test_actions.cc b/third_party/abseil-cpp/absl/log/internal/test_actions.cc
new file mode 100644
index 0000000000..41ca98877f
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/test_actions.cc
@@ -0,0 +1,68 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/test_actions.h"
+
+#include <cassert>
+#include <iostream>
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/log/internal/config.h"
+#include "absl/strings/escaping.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+void WriteToStderrWithFilename::operator()(const absl::LogEntry& entry) const {
+  std::cerr << message << " (file: " << entry.source_filename() << ")"
+            << std::endl;
+}
+
+void WriteEntryToStderr::operator()(const absl::LogEntry& entry) const {
+  if (!message.empty()) std::cerr << message << std::endl;
+
+  std::cerr << "LogEntry{\n"
+            << "  source_filename: \""
+            << absl::CHexEscape(entry.source_filename()) << "\"\n"
+            << "  source_basename: \""
+            << absl::CHexEscape(entry.source_basename()) << "\"\n"
+            << "  source_line: " << entry.source_line() << "\n"
+            << "  prefix: " << (entry.prefix() ? "true\n" : "false\n")
+            << "  log_severity: " << entry.log_severity() << "\n"
+            << "  timestamp: " << entry.timestamp() << "\n"
+            << "  text_message: \"" << absl::CHexEscape(entry.text_message())
+            << "\"\n  verbosity: " << entry.verbosity() << "\n"
+            << "}" << std::endl;
+}
+
+void WriteEntryToStderr::operator()(absl::LogSeverity severity,
+                                    absl::string_view filename,
+                                    absl::string_view log_message) const {
+  if (!message.empty()) std::cerr << message << std::endl;
+
+  std::cerr << "LogEntry{\n"
+            << "  source_filename: \"" << absl::CHexEscape(filename) << "\"\n"
+            << "  log_severity: " << severity << "\n"
+            << "  text_message: \"" << absl::CHexEscape(log_message) << "}"
+            << std::endl;
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/test_actions.h b/third_party/abseil-cpp/absl/log/internal/test_actions.h
new file mode 100644
index 0000000000..649a050521
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/test_actions.h
@@ -0,0 +1,90 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/test_actions.h
+// -----------------------------------------------------------------------------
+//
+// This file declares Googletest's actions used in the Abseil Logging library
+// unit tests.
+
+#ifndef ABSL_LOG_INTERNAL_TEST_ACTIONS_H_
+#define ABSL_LOG_INTERNAL_TEST_ACTIONS_H_
+
+#include <iostream>
+#include <ostream>
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/log_entry.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// These actions are used by the child process in a death test.
+//
+// Expectations set in the child cannot cause test failure in the parent
+// directly.  Instead, the child can use these actions with
+// `EXPECT_CALL`/`WillOnce` and `ON_CALL`/`WillByDefault` (for unexpected calls)
+// to write messages to stderr that the parent can match against.
+struct WriteToStderr final {
+  explicit WriteToStderr(absl::string_view m) : message(m) {}
+  std::string message;
+
+  template <typename... Args>
+  void operator()(const Args&...) const {
+    std::cerr << message << std::endl;
+  }
+};
+
+struct WriteToStderrWithFilename final {
+  explicit WriteToStderrWithFilename(absl::string_view m) : message(m) {}
+
+  std::string message;
+
+  void operator()(const absl::LogEntry& entry) const;
+};
+
+struct WriteEntryToStderr final {
+  explicit WriteEntryToStderr(absl::string_view m) : message(m) {}
+
+  std::string message = "";
+
+  void operator()(const absl::LogEntry& entry) const;
+  void operator()(absl::LogSeverity, absl::string_view,
+                  absl::string_view) const;
+};
+
+// See the documentation for `DeathTestValidateExpectations` above.
+// `DeathTestExpectedLogging` should be used once in a given death test, and the
+// applicable severity level is the one that should be passed to
+// `DeathTestValidateExpectations`.
+inline WriteEntryToStderr DeathTestExpectedLogging() {
+  return WriteEntryToStderr{"Mock received expected entry:"};
+}
+
+// `DeathTestUnexpectedLogging` should be used zero or more times to mark
+// messages that should not hit the logs as the process dies.
+inline WriteEntryToStderr DeathTestUnexpectedLogging() {
+  return WriteEntryToStderr{"Mock received unexpected entry:"};
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_TEST_ACTIONS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/test_helpers.cc b/third_party/abseil-cpp/absl/log/internal/test_helpers.cc
new file mode 100644
index 0000000000..0de5b96b43
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/test_helpers.cc
@@ -0,0 +1,82 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "absl/log/internal/test_helpers.h"
+
+#ifdef __Fuchsia__
+#include <zircon/syscalls.h>
+#endif
+
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "absl/log/initialize.h"
+#include "absl/log/internal/globals.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Returns false if the specified severity level is disabled by
+// `ABSL_MIN_LOG_LEVEL` or `absl::MinLogLevel()`.
+bool LoggingEnabledAt(absl::LogSeverity severity) {
+  return severity >= kAbslMinLogLevel && severity >= absl::MinLogLevel();
+}
+
+// -----------------------------------------------------------------------------
+// Googletest Death Test Predicates
+// -----------------------------------------------------------------------------
+
+#if GTEST_HAS_DEATH_TEST
+
+bool DiedOfFatal(int exit_status) {
+#if defined(_WIN32)
+  // Depending on NDEBUG and (configuration?) MSVC's abort either results
+  // in error code 3 (SIGABRT) or error code 0x80000003 (breakpoint
+  // triggered).
+  return ::testing::ExitedWithCode(3)(exit_status & 0x7fffffff);
+#elif defined(__Fuchsia__)
+  // The Fuchsia death test implementation kill()'s the process when it detects
+  // an exception, so it should exit with the corresponding code. See
+  // FuchsiaDeathTest::Wait().
+  return ::testing::ExitedWithCode(ZX_TASK_RETCODE_SYSCALL_KILL)(exit_status);
+#elif defined(__ANDROID__) && defined(__aarch64__)
+  // These are all run under a qemu config that eats died-due-to-signal exit
+  // statuses.
+  return true;
+#else
+  return ::testing::KilledBySignal(SIGABRT)(exit_status);
+#endif
+}
+
+bool DiedOfQFatal(int exit_status) {
+  return ::testing::ExitedWithCode(1)(exit_status);
+}
+
+#endif
+
+// -----------------------------------------------------------------------------
+// Helper for Log inititalization in test
+// -----------------------------------------------------------------------------
+
+void LogTestEnvironment::SetUp() {
+  if (!absl::log_internal::IsInitialized()) {
+    absl::InitializeLog();
+  }
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/test_helpers.h b/third_party/abseil-cpp/absl/log/internal/test_helpers.h
new file mode 100644
index 0000000000..fd06e295a2
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/test_helpers.h
@@ -0,0 +1,71 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/test_helpers.h
+// -----------------------------------------------------------------------------
+//
+// This file declares testing helpers for the logging library.
+
+#ifndef ABSL_LOG_INTERNAL_TEST_HELPERS_H_
+#define ABSL_LOG_INTERNAL_TEST_HELPERS_H_
+
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// `ABSL_MIN_LOG_LEVEL` can't be used directly since it is not always defined.
+constexpr auto kAbslMinLogLevel =
+#ifdef ABSL_MIN_LOG_LEVEL
+    static_cast<absl::LogSeverityAtLeast>(ABSL_MIN_LOG_LEVEL);
+#else
+    absl::LogSeverityAtLeast::kInfo;
+#endif
+
+// Returns false if the specified severity level is disabled by
+// `ABSL_MIN_LOG_LEVEL` or `absl::MinLogLevel()`.
+bool LoggingEnabledAt(absl::LogSeverity severity);
+
+// -----------------------------------------------------------------------------
+// Googletest Death Test Predicates
+// -----------------------------------------------------------------------------
+
+#if GTEST_HAS_DEATH_TEST
+
+bool DiedOfFatal(int exit_status);
+bool DiedOfQFatal(int exit_status);
+
+#endif
+
+// -----------------------------------------------------------------------------
+// Helper for Log inititalization in test
+// -----------------------------------------------------------------------------
+
+class LogTestEnvironment : public ::testing::Environment {
+ public:
+  ~LogTestEnvironment() override = default;
+
+  void SetUp() override;
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_TEST_HELPERS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/test_matchers.cc b/third_party/abseil-cpp/absl/log/internal/test_matchers.cc
new file mode 100644
index 0000000000..ee32617ba7
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/test_matchers.cc
@@ -0,0 +1,168 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/test_matchers.h"
+
+#include <sstream>
+#include <string>
+#include <utility>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+::testing::Matcher<const absl::LogEntry&> SourceFilename(
+    const ::testing::Matcher<absl::string_view>& source_filename) {
+  return Property("source_filename", &absl::LogEntry::source_filename,
+                  source_filename);
+}
+
+::testing::Matcher<const absl::LogEntry&> SourceBasename(
+    const ::testing::Matcher<absl::string_view>& source_basename) {
+  return Property("source_basename", &absl::LogEntry::source_basename,
+                  source_basename);
+}
+
+::testing::Matcher<const absl::LogEntry&> SourceLine(
+    const ::testing::Matcher<int>& source_line) {
+  return Property("source_line", &absl::LogEntry::source_line, source_line);
+}
+
+::testing::Matcher<const absl::LogEntry&> Prefix(
+    const ::testing::Matcher<bool>& prefix) {
+  return Property("prefix", &absl::LogEntry::prefix, prefix);
+}
+
+::testing::Matcher<const absl::LogEntry&> LogSeverity(
+    const ::testing::Matcher<absl::LogSeverity>& log_severity) {
+  return Property("log_severity", &absl::LogEntry::log_severity, log_severity);
+}
+
+::testing::Matcher<const absl::LogEntry&> Timestamp(
+    const ::testing::Matcher<absl::Time>& timestamp) {
+  return Property("timestamp", &absl::LogEntry::timestamp, timestamp);
+}
+
+::testing::Matcher<const absl::LogEntry&> TimestampInMatchWindow() {
+  return Property("timestamp", &absl::LogEntry::timestamp,
+                  ::testing::AllOf(::testing::Ge(absl::Now()),
+                                   ::testing::Truly([](absl::Time arg) {
+                                     return arg <= absl::Now();
+                                   })));
+}
+
+::testing::Matcher<const absl::LogEntry&> ThreadID(
+    const ::testing::Matcher<absl::LogEntry::tid_t>& tid) {
+  return Property("tid", &absl::LogEntry::tid, tid);
+}
+
+::testing::Matcher<const absl::LogEntry&> TextMessageWithPrefixAndNewline(
+    const ::testing::Matcher<absl::string_view>&
+        text_message_with_prefix_and_newline) {
+  return Property("text_message_with_prefix_and_newline",
+                  &absl::LogEntry::text_message_with_prefix_and_newline,
+                  text_message_with_prefix_and_newline);
+}
+
+::testing::Matcher<const absl::LogEntry&> TextMessageWithPrefix(
+    const ::testing::Matcher<absl::string_view>& text_message_with_prefix) {
+  return Property("text_message_with_prefix",
+                  &absl::LogEntry::text_message_with_prefix,
+                  text_message_with_prefix);
+}
+
+::testing::Matcher<const absl::LogEntry&> TextMessage(
+    const ::testing::Matcher<absl::string_view>& text_message) {
+  return Property("text_message", &absl::LogEntry::text_message, text_message);
+}
+
+::testing::Matcher<const absl::LogEntry&> TextPrefix(
+    const ::testing::Matcher<absl::string_view>& text_prefix) {
+  return ResultOf(
+      [](const absl::LogEntry& entry) {
+        absl::string_view msg = entry.text_message_with_prefix();
+        msg.remove_suffix(entry.text_message().size());
+        return msg;
+      },
+      text_prefix);
+}
+
+::testing::Matcher<const absl::LogEntry&> Verbosity(
+    const ::testing::Matcher<int>& verbosity) {
+  return Property("verbosity", &absl::LogEntry::verbosity, verbosity);
+}
+
+::testing::Matcher<const absl::LogEntry&> Stacktrace(
+    const ::testing::Matcher<absl::string_view>& stacktrace) {
+  return Property("stacktrace", &absl::LogEntry::stacktrace, stacktrace);
+}
+
+class MatchesOstreamImpl final
+    : public ::testing::MatcherInterface<absl::string_view> {
+ public:
+  explicit MatchesOstreamImpl(std::string expected)
+      : expected_(std::move(expected)) {}
+  bool MatchAndExplain(absl::string_view actual,
+                       ::testing::MatchResultListener*) const override {
+    return actual == expected_;
+  }
+  void DescribeTo(std::ostream* os) const override {
+    *os << "matches the contents of the ostringstream, which are \""
+        << expected_ << "\"";
+  }
+
+  void DescribeNegationTo(std::ostream* os) const override {
+    *os << "does not match the contents of the ostringstream, which are \""
+        << expected_ << "\"";
+  }
+
+ private:
+  const std::string expected_;
+};
+::testing::Matcher<absl::string_view> MatchesOstream(
+    const std::ostringstream& stream) {
+  return ::testing::MakeMatcher(new MatchesOstreamImpl(stream.str()));
+}
+
+// We need to validate what is and isn't logged as the process dies due to
+// `FATAL`, `QFATAL`, `CHECK`, etc., but assertions inside a death test
+// subprocess don't directly affect the pass/fail status of the parent process.
+// Instead, we use the mock actions `DeathTestExpectedLogging` and
+// `DeathTestUnexpectedLogging` to write specific phrases to `stderr` that we
+// can validate in the parent process using this matcher.
+::testing::Matcher<const std::string&> DeathTestValidateExpectations() {
+  if (log_internal::LoggingEnabledAt(absl::LogSeverity::kFatal)) {
+    return ::testing::Matcher<const std::string&>(::testing::AllOf(
+        ::testing::HasSubstr("Mock received expected entry"),
+        Not(::testing::HasSubstr("Mock received unexpected entry"))));
+  }
+  // If `FATAL` logging is disabled, neither message should have been written.
+  return ::testing::Matcher<const std::string&>(::testing::AllOf(
+      Not(::testing::HasSubstr("Mock received expected entry")),
+      Not(::testing::HasSubstr("Mock received unexpected entry"))));
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/internal/test_matchers.h b/third_party/abseil-cpp/absl/log/internal/test_matchers.h
new file mode 100644
index 0000000000..b8179cccca
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/test_matchers.h
@@ -0,0 +1,90 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/test_matchers.h
+// -----------------------------------------------------------------------------
+//
+// This file declares Googletest's matchers used in the Abseil Logging library
+// unit tests.
+
+#ifndef ABSL_LOG_INTERNAL_TEST_MATCHERS_H_
+#define ABSL_LOG_INTERNAL_TEST_MATCHERS_H_
+
+#include <iosfwd>
+#include <sstream>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/log_entry.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// These matchers correspond to the components of `absl::LogEntry`.
+::testing::Matcher<const absl::LogEntry&> SourceFilename(
+    const ::testing::Matcher<absl::string_view>& source_filename);
+::testing::Matcher<const absl::LogEntry&> SourceBasename(
+    const ::testing::Matcher<absl::string_view>& source_basename);
+// Be careful with this one; multi-line statements using `__LINE__` evaluate
+// differently on different platforms.  In particular, the MSVC implementation
+// of `EXPECT_DEATH` returns the line number of the macro expansion to all lines
+// within the code block that's expected to die.
+::testing::Matcher<const absl::LogEntry&> SourceLine(
+    const ::testing::Matcher<int>& source_line);
+::testing::Matcher<const absl::LogEntry&> Prefix(
+    const ::testing::Matcher<bool>& prefix);
+::testing::Matcher<const absl::LogEntry&> LogSeverity(
+    const ::testing::Matcher<absl::LogSeverity>& log_severity);
+::testing::Matcher<const absl::LogEntry&> Timestamp(
+    const ::testing::Matcher<absl::Time>& timestamp);
+// Matches if the `LogEntry`'s timestamp falls after the instantiation of this
+// matcher and before its execution, as is normal when used with EXPECT_CALL.
+::testing::Matcher<const absl::LogEntry&> TimestampInMatchWindow();
+::testing::Matcher<const absl::LogEntry&> ThreadID(
+    const ::testing::Matcher<absl::LogEntry::tid_t>&);
+::testing::Matcher<const absl::LogEntry&> TextMessageWithPrefixAndNewline(
+    const ::testing::Matcher<absl::string_view>&
+        text_message_with_prefix_and_newline);
+::testing::Matcher<const absl::LogEntry&> TextMessageWithPrefix(
+    const ::testing::Matcher<absl::string_view>& text_message_with_prefix);
+::testing::Matcher<const absl::LogEntry&> TextMessage(
+    const ::testing::Matcher<absl::string_view>& text_message);
+::testing::Matcher<const absl::LogEntry&> TextPrefix(
+    const ::testing::Matcher<absl::string_view>& text_prefix);
+::testing::Matcher<const absl::LogEntry&> Verbosity(
+    const ::testing::Matcher<int>& verbosity);
+::testing::Matcher<const absl::LogEntry&> Stacktrace(
+    const ::testing::Matcher<absl::string_view>& stacktrace);
+// Behaves as `Eq(stream.str())`, but produces better failure messages.
+::testing::Matcher<absl::string_view> MatchesOstream(
+    const std::ostringstream& stream);
+::testing::Matcher<const std::string&> DeathTestValidateExpectations();
+
+// This feature coming soon =).
+#define ENCODED_MESSAGE(message_matcher) ::testing::_
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_TEST_MATCHERS_H_
diff --git a/third_party/abseil-cpp/absl/log/internal/voidify.h b/third_party/abseil-cpp/absl/log/internal/voidify.h
new file mode 100644
index 0000000000..8f62da20a0
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/internal/voidify.h
@@ -0,0 +1,44 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/voidify.h
+// -----------------------------------------------------------------------------
+//
+// This class is used to explicitly ignore values in the conditional logging
+// macros. This avoids compiler warnings like "value computed is not used" and
+// "statement has no effect".
+
+#ifndef ABSL_LOG_INTERNAL_VOIDIFY_H_
+#define ABSL_LOG_INTERNAL_VOIDIFY_H_
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+class Voidify final {
+ public:
+  // This has to be an operator with a precedence lower than << but higher than
+  // ?:
+  template <typename T>
+  void operator&&(const T&) const&& {}
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_VOIDIFY_H_
diff --git a/third_party/abseil-cpp/absl/log/log.h b/third_party/abseil-cpp/absl/log/log.h
new file mode 100644
index 0000000000..5331fdbf27
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log.h
@@ -0,0 +1,400 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log.h
+// -----------------------------------------------------------------------------
+//
+// This header declares a family of LOG macros.
+//
+// Basic invocation looks like this:
+//
+//   LOG(INFO) << "Found " << num_cookies << " cookies";
+//
+// Most `LOG` macros take a severity level argument.  The severity levels are
+// `INFO`, `WARNING`, `ERROR`, and `FATAL`.  They are defined
+// in absl/base/log_severity.h.
+// * The `FATAL` severity level terminates the program with a stack trace after
+//   logging its message.  Error handlers registered with `RunOnFailure`
+//   (process_state.h) are run, but exit handlers registered with `atexit(3)`
+//   are not.
+// * The `QFATAL` pseudo-severity level is equivalent to `FATAL` but triggers
+//   quieter termination messages, e.g. without a full stack trace, and skips
+//   running registered error handlers.
+// Some preprocessor shenanigans are used to ensure that e.g. `LOG(INFO)` has
+// the same meaning even if a local symbol or preprocessor macro named `INFO` is
+// defined.  To specify a severity level using an expression instead of a
+// literal, use `LEVEL(expr)`.
+// Example:
+//
+//   LOG(LEVEL(stale ? absl::LogSeverity::kWarning : absl::LogSeverity::kInfo))
+//       << "Cookies are " << days << " days old";
+
+// `LOG` macros evaluate to an unterminated statement.  The value at the end of
+// the statement supports some chainable methods:
+//
+//   * .AtLocation(absl::string_view file, int line)
+//     .AtLocation(absl::SourceLocation loc)
+//     Overrides the location inferred from the callsite.  The string pointed to
+//     by `file` must be valid until the end of the statement.
+//   * .NoPrefix()
+//     Omits the prefix from this line.  The prefix includes metadata about the
+//     logged data such as source code location and timestamp.
+//   * .WithTimestamp(absl::Time timestamp)
+//     Uses the specified timestamp instead of one collected at the time of
+//     execution.
+//   * .WithThreadID(absl::LogEntry::tid_t tid)
+//     Uses the specified thread ID instead of one collected at the time of
+//     execution.
+//   * .WithMetadataFrom(const absl::LogEntry &entry)
+//     Copies all metadata (but no data) from the specified `absl::LogEntry`.
+//     This can be used to change the severity of a message, but it has some
+//     limitations:
+//     * `ABSL_MIN_LOG_LEVEL` is evaluated against the severity passed into
+//       `LOG` (or the implicit `FATAL` level of `CHECK`).
+//     * `LOG(FATAL)` and `CHECK` terminate the process unconditionally, even if
+//       the severity is changed later.
+//     `.WithMetadataFrom(entry)` should almost always be used in combination
+//     with `LOG(LEVEL(entry.log_severity()))`.
+//   * .WithPerror()
+//     Appends to the logged message a colon, a space, a textual description of
+//     the current value of `errno` (as by `strerror(3)`), and the numerical
+//     value of `errno`.
+//   * .ToSinkAlso(absl::LogSink* sink)
+//     Sends this message to `*sink` in addition to whatever other sinks it
+//     would otherwise have been sent to.  `sink` must not be null.
+//   * .ToSinkOnly(absl::LogSink* sink)
+//     Sends this message to `*sink` and no others.  `sink` must not be null.
+//
+// No interfaces in this header are async-signal-safe; their use in signal
+// handlers is unsupported and may deadlock your program or eat your lunch.
+//
+// Many logging statements are inherently conditional.  For example,
+// `LOG_IF(INFO, !foo)` does nothing if `foo` is true.  Even seemingly
+// unconditional statements like `LOG(INFO)` might be disabled at
+// compile-time to minimize binary size or for security reasons.
+//
+// * Except for the condition in a `CHECK` or `QCHECK` statement, programs must
+//   not rely on evaluation of expressions anywhere in logging statements for
+//   correctness.  For example, this is ok:
+//
+//     CHECK((fp = fopen("config.ini", "r")) != nullptr);
+//
+//   But this is probably not ok:
+//
+//     LOG(INFO) << "Server status: " << StartServerAndReturnStatusString();
+//
+//   The example below is bad too; the `i++` in the `LOG_IF` condition might
+//   not be evaluated, resulting in an infinite loop:
+//
+//     for (int i = 0; i < 1000000;)
+//       LOG_IF(INFO, i++ % 1000 == 0) << "Still working...";
+//
+// * Except where otherwise noted, conditions which cause a statement not to log
+//   also cause expressions not to be evaluated.  Programs may rely on this for
+//   performance reasons, e.g. by streaming the result of an expensive function
+//   call into a `DLOG` or `LOG_EVERY_N` statement.
+// * Care has been taken to ensure that expressions are parsed by the compiler
+//   even if they are never evaluated.  This means that syntax errors will be
+//   caught and variables will be considered used for the purposes of
+//   unused-variable diagnostics.  For example, this statement won't compile
+//   even if `INFO`-level logging has been compiled out:
+//
+//     int number_of_cakes = 40;
+//     LOG(INFO) << "Number of cakes: " << number_of_cake;  // Note the typo!
+//
+//   Similarly, this won't produce unused-variable compiler diagnostics even
+//   if `INFO`-level logging is compiled out:
+//
+//     {
+//       char fox_line1[] = "Hatee-hatee-hatee-ho!";
+//       LOG_IF(ERROR, false) << "The fox says " << fox_line1;
+//       char fox_line2[] = "A-oo-oo-oo-ooo!";
+//       LOG(INFO) << "The fox also says " << fox_line2;
+//     }
+//
+//   This error-checking is not perfect; for example, symbols that have been
+//   declared but not defined may not produce link errors if used in logging
+//   statements that compile away.
+//
+// Expressions streamed into these macros are formatted using `operator<<` just
+// as they would be if streamed into a `std::ostream`, however it should be
+// noted that their actual type is unspecified.
+//
+// To implement a custom formatting operator for a type you own, define
+// `std::ostream& operator<<(std::ostream&, ...)` in your type's namespace (for
+// ADL) just as you would to stream it to `std::cout`.
+//
+// Those macros that support streaming honor output manipulators and `fmtflag`
+// changes that output data (e.g. `std::ends`) or control formatting of data
+// (e.g. `std::hex` and `std::fixed`), however flushing such a stream is
+// ignored.  The message produced by a log statement is sent to registered
+// `absl::LogSink` instances at the end of the statement; those sinks are
+// responsible for their own flushing (e.g. to disk) semantics.
+//
+// Flag settings are not carried over from one `LOG` statement to the next; this
+// is a bit different than e.g. `std::cout`:
+//
+//   LOG(INFO) << std::hex << 0xdeadbeef;  // logs "0xdeadbeef"
+//   LOG(INFO) << 0xdeadbeef;              // logs "3735928559"
+
+#ifndef ABSL_LOG_LOG_H_
+#define ABSL_LOG_LOG_H_
+
+#include "absl/log/internal/conditions.h"
+#include "absl/log/internal/log_message.h"
+#include "absl/log/internal/strip.h"
+
+// LOG()
+//
+// `LOG` takes a single argument which is a severity level.  Data streamed in
+// comprise the logged message.
+// Example:
+//
+//   LOG(INFO) << "Found " << num_cookies << " cookies";
+#define LOG(severity)                                     \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, true) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+// PLOG()
+//
+// `PLOG` behaves like `LOG` except that a description of the current state of
+// `errno` is appended to the streamed message.
+#define PLOG(severity)                                      \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, true)   \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream() \
+          .WithPerror()
+
+// DLOG()
+//
+// `DLOG` behaves like `LOG` in debug mode (i.e. `#ifndef NDEBUG`).  Otherwise
+// it compiles away and does nothing.  Note that `DLOG(FATAL)` does not
+// terminate the program if `NDEBUG` is defined.
+#ifndef NDEBUG
+#define DLOG(severity)                                    \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, true) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#else
+#define DLOG(severity)                                     \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, false) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#endif
+
+// `LOG_IF` and friends add a second argument which specifies a condition.  If
+// the condition is false, nothing is logged.
+// Example:
+//
+//   LOG_IF(INFO, num_cookies > 10) << "Got lots of cookies";
+#define LOG_IF(severity, condition)                            \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, condition) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#define PLOG_IF(severity, condition)                           \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, condition) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()    \
+          .WithPerror()
+
+#ifndef NDEBUG
+#define DLOG_IF(severity, condition)                           \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, condition) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#else
+#define DLOG_IF(severity, condition)                                      \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATELESS, false && (condition)) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#endif
+
+// LOG_EVERY_N
+//
+// An instance of `LOG_EVERY_N` increments a hidden zero-initialized counter
+// every time execution passes through it and logs the specified message when
+// the counter's value is a multiple of `n`, doing nothing otherwise.  Each
+// instance has its own counter.  The counter's value can be logged by streaming
+// the symbol `COUNTER`.  `LOG_EVERY_N` is thread-safe.
+// Example:
+//
+//   LOG_EVERY_N(WARNING, 1000) << "Got a packet with a bad CRC (" << COUNTER
+//                              << " total)";
+#define LOG_EVERY_N(severity, n)                                    \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+// LOG_FIRST_N
+//
+// `LOG_FIRST_N` behaves like `LOG_EVERY_N` except that the specified message is
+// logged when the counter's value is less than `n`.  `LOG_FIRST_N` is
+// thread-safe.
+#define LOG_FIRST_N(severity, n)                                    \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+// LOG_EVERY_POW_2
+//
+// `LOG_EVERY_POW_2` behaves like `LOG_EVERY_N` except that the specified
+// message is logged when the counter's value is a power of 2.
+// `LOG_EVERY_POW_2` is thread-safe.
+#define LOG_EVERY_POW_2(severity)                                   \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+// LOG_EVERY_N_SEC
+//
+// An instance of `LOG_EVERY_N_SEC` uses a hidden state variable to log the
+// specified message at most once every `n_seconds`.  A hidden counter of
+// executions (whether a message is logged or not) is also maintained and can be
+// logged by streaming the symbol `COUNTER`.  `LOG_EVERY_N_SEC` is thread-safe.
+// Example:
+//
+//   LOG_EVERY_N_SEC(INFO, 2.5) << "Got " << COUNTER << " cookies so far";
+#define LOG_EVERY_N_SEC(severity, n_seconds)                                   \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(EveryNSec, n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define PLOG_EVERY_N(severity, n)                                   \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()         \
+          .WithPerror()
+
+#define PLOG_FIRST_N(severity, n)                                   \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()         \
+          .WithPerror()
+
+#define PLOG_EVERY_POW_2(severity)                                  \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()         \
+          .WithPerror()
+
+#define PLOG_EVERY_N_SEC(severity, n_seconds)                                  \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, true)(EveryNSec, n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()                    \
+          .WithPerror()
+
+#ifndef NDEBUG
+#define DLOG_EVERY_N(severity, n)                  \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true) \
+  (EveryN, n) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_FIRST_N(severity, n)                  \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true) \
+  (FirstN, n) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_EVERY_POW_2(severity)                 \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true) \
+  (EveryPow2) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_EVERY_N_SEC(severity, n_seconds)      \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true) \
+  (EveryNSec, n_seconds) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#else  // def NDEBUG
+#define DLOG_EVERY_N(severity, n)                   \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false) \
+  (EveryN, n) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_FIRST_N(severity, n)                   \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false) \
+  (FirstN, n) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_EVERY_POW_2(severity)                  \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false) \
+  (EveryPow2) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_EVERY_N_SEC(severity, n_seconds)       \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false) \
+  (EveryNSec, n_seconds) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#endif  // def NDEBUG
+
+// `LOG_IF_EVERY_N` and friends behave as the corresponding `LOG_EVERY_N`
+// but neither increment a counter nor log a message if condition is false (as
+// `LOG_IF`).
+// Example:
+//
+//   LOG_IF_EVERY_N(INFO, (size > 1024), 10) << "Got the " << COUNTER
+//                                           << "th big cookie";
+#define LOG_IF_EVERY_N(severity, condition, n)                           \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define LOG_IF_FIRST_N(severity, condition, n)                           \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define LOG_IF_EVERY_POW_2(severity, condition)                          \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define LOG_IF_EVERY_N_SEC(severity, condition, n_seconds)               \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryNSec, \
+                                                              n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define PLOG_IF_EVERY_N(severity, condition, n)                          \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()              \
+          .WithPerror()
+
+#define PLOG_IF_FIRST_N(severity, condition, n)                          \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()              \
+          .WithPerror()
+
+#define PLOG_IF_EVERY_POW_2(severity, condition)                         \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()              \
+          .WithPerror()
+
+#define PLOG_IF_EVERY_N_SEC(severity, condition, n_seconds)              \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryNSec, \
+                                                              n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()              \
+          .WithPerror()
+
+#ifndef NDEBUG
+#define DLOG_IF_EVERY_N(severity, condition, n)                          \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_IF_FIRST_N(severity, condition, n)                          \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_IF_EVERY_POW_2(severity, condition)                         \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_IF_EVERY_N_SEC(severity, condition, n_seconds)              \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, condition)(EveryNSec, \
+                                                              n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#else  // def NDEBUG
+#define DLOG_IF_EVERY_N(severity, condition, n)                           \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, false && (condition))( \
+      EveryN, n) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_IF_FIRST_N(severity, condition, n)                           \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, false && (condition))( \
+      FirstN, n) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_IF_EVERY_POW_2(severity, condition)                          \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, false && (condition))( \
+      EveryPow2) ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+
+#define DLOG_IF_EVERY_N_SEC(severity, condition, n_seconds)               \
+  ABSL_LOG_INTERNAL_CONDITION_##severity(STATEFUL, false && (condition))( \
+      EveryNSec, n_seconds)                                               \
+      ABSL_LOGGING_INTERNAL_LOG_##severity.InternalStream()
+#endif  // def NDEBUG
+
+#endif  // ABSL_LOG_LOG_H_
diff --git a/third_party/abseil-cpp/absl/log/log_benchmark.cc b/third_party/abseil-cpp/absl/log/log_benchmark.cc
new file mode 100644
index 0000000000..45d9a5d6fd
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_benchmark.cc
@@ -0,0 +1,97 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/flags/flag.h"
+#include "absl/log/check.h"
+#include "absl/log/globals.h"
+#include "absl/log/log.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/log/log_sink_registry.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+class NullLogSink : public absl::LogSink {
+ public:
+  NullLogSink() { absl::AddLogSink(this); }
+
+  ~NullLogSink() override { absl::RemoveLogSink(this); }
+
+  void Send(const absl::LogEntry&) override {}
+};
+
+constexpr int x = -1;
+
+void BM_SuccessfulBinaryCheck(benchmark::State& state) {
+  int n = 0;
+  while (state.KeepRunningBatch(8)) {
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    ++n;
+  }
+  benchmark::DoNotOptimize(n);
+}
+BENCHMARK(BM_SuccessfulBinaryCheck);
+
+static void BM_SuccessfulUnaryCheck(benchmark::State& state) {
+  int n = 0;
+  while (state.KeepRunningBatch(8)) {
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    ++n;
+  }
+  benchmark::DoNotOptimize(n);
+}
+BENCHMARK(BM_SuccessfulUnaryCheck);
+
+static void BM_DisabledLogOverhead(benchmark::State& state) {
+  absl::ScopedStderrThreshold disable_stderr_logging(
+      absl::LogSeverityAtLeast::kInfinity);
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
+      absl::LogSeverityAtLeast::kInfinity);
+  for (auto _ : state) {
+    LOG(INFO);
+  }
+}
+BENCHMARK(BM_DisabledLogOverhead);
+
+static void BM_EnabledLogOverhead(benchmark::State& state) {
+  absl::ScopedStderrThreshold stderr_logging(
+      absl::LogSeverityAtLeast::kInfinity);
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
+      absl::LogSeverityAtLeast::kInfo);
+  ABSL_ATTRIBUTE_UNUSED NullLogSink null_sink;
+  for (auto _ : state) {
+    LOG(INFO);
+  }
+}
+BENCHMARK(BM_EnabledLogOverhead);
+
+}  // namespace
+
diff --git a/third_party/abseil-cpp/absl/debugging/leak_check_disable.cc b/third_party/abseil-cpp/absl/log/log_entry.cc
index 924d6e3d54..19c3b3f1be 100644
--- a/third_party/abseil-cpp/absl/debugging/leak_check_disable.cc
+++ b/third_party/abseil-cpp/absl/log/log_entry.cc
@@ -1,4 +1,5 @@
-// Copyright 2017 The Abseil Authors.
+//
+// Copyright 2022 The Abseil Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -12,9 +13,17 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Disable LeakSanitizer when this file is linked in.
-// This function overrides __lsan_is_turned_off from sanitizer/lsan_interface.h
-extern "C" int __lsan_is_turned_off();
-extern "C" int __lsan_is_turned_off() {
-  return 1;
-}
+#include "absl/log/log_entry.h"
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr int LogEntry::kNoVerbosityLevel;
+constexpr int LogEntry::kNoVerboseLevel;
+#endif
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/log_entry.h b/third_party/abseil-cpp/absl/log/log_entry.h
new file mode 100644
index 0000000000..30114c33f3
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_entry.h
@@ -0,0 +1,210 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_entry.h
+// -----------------------------------------------------------------------------
+//
+// This header declares `class absl::LogEntry`, which represents a log record as
+// passed to `LogSink::Send`. Data returned by pointer or by reference or by
+// `absl::string_view` must be copied if they are needed after the lifetime of
+// the `absl::LogEntry`.
+
+#ifndef ABSL_LOG_LOG_ENTRY_H_
+#define ABSL_LOG_LOG_ENTRY_H_
+
+#include <cstddef>
+#include <string>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/config.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+namespace log_internal {
+// Test only friend.
+class LogEntryTestPeer;
+class LogMessage;
+}  // namespace log_internal
+
+// LogEntry
+//
+// Represents a single entry in a log, i.e., one `LOG` statement or failed
+// `CHECK`.
+//
+// `LogEntry` is copyable and thread-compatible.
+class LogEntry final {
+ public:
+  using tid_t = log_internal::Tid;
+
+  // For non-verbose log entries, `verbosity()` returns `kNoVerbosityLevel`.
+  static constexpr int kNoVerbosityLevel = -1;
+  static constexpr int kNoVerboseLevel = -1;  // TO BE removed
+
+  // Pass `LogEntry` by reference, and do not store it as its state does not
+  // outlive the call to `LogSink::Send()`.
+  LogEntry(const LogEntry&) = delete;
+  LogEntry& operator=(const LogEntry&) = delete;
+
+  // Source file and line where the log message occurred.  Taken from `__FILE__`
+  // and `__LINE__` unless overridden by `LOG(...).AtLocation(...)`.
+  //
+  // Take special care not to use the values returned by `source_filename()` and
+  // `source_basename()` after the lifetime of the entry.  This is always
+  // incorrect, but it will often work in practice because they usually point
+  // into a statically allocated character array obtained from `__FILE__`.
+  // Statements like `LOG(INFO).AtLocation(std::string(...), ...)` will expose
+  // the bug.  If you need the data later, you must copy them.
+  absl::string_view source_filename() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return full_filename_;
+  }
+  absl::string_view source_basename() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return base_filename_;
+  }
+  int source_line() const { return line_; }
+
+  // LogEntry::prefix()
+  //
+  // True unless the metadata prefix was suppressed once by
+  // `LOG(...).NoPrefix()` or globally by `absl::EnableLogPrefix(false)`.
+  // Implies `text_message_with_prefix() == text_message()`.
+  bool prefix() const { return prefix_; }
+
+  // LogEntry::log_severity()
+  //
+  // Returns this entry's severity.  For `LOG`, taken from the first argument;
+  // for `CHECK`, always `absl::LogSeverity::kFatal`.
+  absl::LogSeverity log_severity() const { return severity_; }
+
+  // LogEntry::verbosity()
+  //
+  // Returns this entry's verbosity, or `kNoVerbosityLevel` for a non-verbose
+  // entry.  Verbosity control is not available outside of Google yet.
+  int verbosity() const { return verbose_level_; }
+
+  // LogEntry::timestamp()
+  //
+  // Returns the time at which this entry was written.  Captured during
+  // evaluation of `LOG`, but can be overridden by
+  // `LOG(...).WithTimestamp(...)`.
+  //
+  // Take care not to rely on timestamps increasing monotonically, or even to
+  // rely on timestamps having any particular relationship with reality (since
+  // they can be overridden).
+  absl::Time timestamp() const { return timestamp_; }
+
+  // LogEntry::tid()
+  //
+  // Returns the ID of the thread that wrote this entry.  Captured during
+  // evaluation of `LOG`, but can be overridden by `LOG(...).WithThreadID(...)`.
+  //
+  // Take care not to *rely* on reported thread IDs as they can be overridden as
+  // specified above.
+  tid_t tid() const { return tid_; }
+
+  // Text-formatted version of the log message.  An underlying buffer holds
+  // these contiguous data:
+  //
+  // * A prefix formed by formatting metadata (timestamp, filename, line number,
+  //   etc.)
+  //   The prefix may be empty - see `LogEntry::prefix()` - and may rarely be
+  //   truncated if the metadata are very long.
+  // * The streamed data
+  //   The data may be empty if nothing was streamed, or may be truncated to fit
+  //   the buffer.
+  // * A newline
+  // * A nul terminator
+  //
+  // The newline and nul terminator will be present even if the prefix and/or
+  // data are truncated.
+  //
+  // These methods give access to the most commonly useful substrings of the
+  // buffer's contents.  Other combinations can be obtained with substring
+  // arithmetic.
+  //
+  // The buffer does not outlive the entry; if you need the data later, you must
+  // copy them.
+  absl::string_view text_message_with_prefix_and_newline() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data(),
+        text_message_with_prefix_and_newline_and_nul_.size() - 1);
+  }
+  absl::string_view text_message_with_prefix() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data(),
+        text_message_with_prefix_and_newline_and_nul_.size() - 2);
+  }
+  absl::string_view text_message_with_newline() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data() + prefix_len_,
+        text_message_with_prefix_and_newline_and_nul_.size() - prefix_len_ - 1);
+  }
+  absl::string_view text_message() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data() + prefix_len_,
+        text_message_with_prefix_and_newline_and_nul_.size() - prefix_len_ - 2);
+  }
+  const char* text_message_with_prefix_and_newline_c_str() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return text_message_with_prefix_and_newline_and_nul_.data();
+  }
+
+  // LogEntry::stacktrace()
+  //
+  // Optional stacktrace, e.g. for `FATAL` logs and failed `CHECK`s.
+  //
+  // Fatal entries are dispatched to each sink twice: first with all data and
+  // metadata but no stacktrace, and then with the stacktrace.  This is done
+  // because stacktrace collection is sometimes slow and fallible, and it's
+  // critical to log enough information to diagnose the failure even if the
+  // stacktrace collection hangs.
+  //
+  // The buffer does not outlive the entry; if you need the data later, you must
+  // copy them.
+  absl::string_view stacktrace() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return stacktrace_;
+  }
+
+ private:
+  LogEntry() = default;
+
+  absl::string_view full_filename_;
+  absl::string_view base_filename_;
+  int line_;
+  bool prefix_;
+  absl::LogSeverity severity_;
+  int verbose_level_;  // >=0 for `VLOG`, etc.; otherwise `kNoVerbosityLevel`.
+  absl::Time timestamp_;
+  tid_t tid_;
+  absl::Span<const char> text_message_with_prefix_and_newline_and_nul_;
+  size_t prefix_len_;
+  std::string stacktrace_;
+
+  friend class log_internal::LogEntryTestPeer;
+  friend class log_internal::LogMessage;
+};
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_ENTRY_H_
diff --git a/third_party/abseil-cpp/absl/log/log_entry_test.cc b/third_party/abseil-cpp/absl/log/log_entry_test.cc
new file mode 100644
index 0000000000..7238356e24
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_entry_test.cc
@@ -0,0 +1,439 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/log_entry.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <cstring>
+#include <limits>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/log_format.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_split.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/civil_time.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace {
+
+using ::absl::log_internal::LogEntryTestPeer;
+using ::testing::Eq;
+using ::testing::IsTrue;
+using ::testing::StartsWith;
+using ::testing::StrEq;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+// Copies into `dst` as many bytes of `src` as will fit, then truncates the
+// copied bytes from the front of `dst` and returns the number of bytes written.
+size_t AppendTruncated(absl::string_view src, absl::Span<char>& dst) {
+  if (src.size() > dst.size()) src = src.substr(0, dst.size());
+  memcpy(dst.data(), src.data(), src.size());
+  dst.remove_prefix(src.size());
+  return src.size();
+}
+
+}  // namespace
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+class LogEntryTestPeer {
+ public:
+  LogEntryTestPeer(absl::string_view base_filename, int line, bool prefix,
+                   absl::LogSeverity severity, absl::string_view timestamp,
+                   absl::LogEntry::tid_t tid, absl::string_view text_message)
+      : buf_(15000, '\0') {
+    entry_.base_filename_ = base_filename;
+    entry_.line_ = line;
+    entry_.prefix_ = prefix;
+    entry_.severity_ = severity;
+    std::string time_err;
+    EXPECT_THAT(
+        absl::ParseTime("%Y-%m-%d%ET%H:%M:%E*S", timestamp,
+                        absl::LocalTimeZone(), &entry_.timestamp_, &time_err),
+        IsTrue())
+        << "Failed to parse time " << timestamp << ": " << time_err;
+    entry_.tid_ = tid;
+    std::pair<absl::string_view, std::string> timestamp_bits =
+        absl::StrSplit(timestamp, absl::ByChar('.'));
+    EXPECT_THAT(absl::ParseCivilTime(timestamp_bits.first, &ci_.cs), IsTrue())
+        << "Failed to parse time " << timestamp_bits.first;
+    timestamp_bits.second.resize(9, '0');
+    int64_t nanos = 0;
+    EXPECT_THAT(absl::SimpleAtoi(timestamp_bits.second, &nanos), IsTrue())
+        << "Failed to parse time " << timestamp_bits.first;
+    ci_.subsecond = absl::Nanoseconds(nanos);
+
+    absl::Span<char> view = absl::MakeSpan(buf_);
+    view.remove_suffix(2);
+    entry_.prefix_len_ =
+        entry_.prefix_
+            ? log_internal::FormatLogPrefix(
+                  entry_.log_severity(), entry_.timestamp(), entry_.tid(),
+                  entry_.source_basename(), entry_.source_line(), view)
+            : 0;
+
+    EXPECT_THAT(entry_.prefix_len_,
+                Eq(static_cast<size_t>(view.data() - buf_.data())));
+    AppendTruncated(text_message, view);
+    view = absl::Span<char>(view.data(), view.size() + 2);
+    view[0] = '\n';
+    view[1] = '\0';
+    view.remove_prefix(2);
+    buf_.resize(static_cast<size_t>(view.data() - buf_.data()));
+    entry_.text_message_with_prefix_and_newline_and_nul_ = absl::MakeSpan(buf_);
+  }
+  LogEntryTestPeer(const LogEntryTestPeer&) = delete;
+  LogEntryTestPeer& operator=(const LogEntryTestPeer&) = delete;
+
+  std::string FormatLogMessage() const {
+    return log_internal::FormatLogMessage(
+        entry_.log_severity(), ci_.cs, ci_.subsecond, entry_.tid(),
+        entry_.source_basename(), entry_.source_line(), entry_.text_message());
+  }
+  std::string FormatPrefixIntoSizedBuffer(size_t sz) {
+    std::string str(sz, '\0');
+    absl::Span<char> buf(&str[0], str.size());
+    const size_t prefix_size = log_internal::FormatLogPrefix(
+        entry_.log_severity(), entry_.timestamp(), entry_.tid(),
+        entry_.source_basename(), entry_.source_line(), buf);
+    EXPECT_THAT(prefix_size, Eq(static_cast<size_t>(buf.data() - str.data())));
+    str.resize(prefix_size);
+    return str;
+  }
+  const absl::LogEntry& entry() const { return entry_; }
+
+ private:
+  absl::LogEntry entry_;
+  absl::TimeZone::CivilInfo ci_;
+  std::vector<char> buf_;
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+namespace {
+constexpr bool kUsePrefix = true, kNoPrefix = false;
+
+TEST(LogEntryTest, Baseline) {
+  LogEntryTestPeer entry("foo.cc", 1234, kUsePrefix, absl::LogSeverity::kInfo,
+                         "2020-01-02T03:04:05.6789", 451, "hello world");
+  EXPECT_THAT(entry.FormatLogMessage(),
+              Eq("I0102 03:04:05.678900     451 foo.cc:1234] hello world"));
+  EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+              Eq("I0102 03:04:05.678900     451 foo.cc:1234] "));
+  for (size_t sz = strlen("I0102 03:04:05.678900     451 foo.cc:1234] ") + 20;
+       sz != std::numeric_limits<size_t>::max(); sz--)
+    EXPECT_THAT("I0102 03:04:05.678900     451 foo.cc:1234] ",
+                StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+  EXPECT_THAT(entry.entry().text_message_with_prefix_and_newline(),
+              Eq("I0102 03:04:05.678900     451 foo.cc:1234] hello world\n"));
+  EXPECT_THAT(
+      entry.entry().text_message_with_prefix_and_newline_c_str(),
+      StrEq("I0102 03:04:05.678900     451 foo.cc:1234] hello world\n"));
+  EXPECT_THAT(entry.entry().text_message_with_prefix(),
+              Eq("I0102 03:04:05.678900     451 foo.cc:1234] hello world"));
+  EXPECT_THAT(entry.entry().text_message(), Eq("hello world"));
+}
+
+TEST(LogEntryTest, NoPrefix) {
+  LogEntryTestPeer entry("foo.cc", 1234, kNoPrefix, absl::LogSeverity::kInfo,
+                         "2020-01-02T03:04:05.6789", 451, "hello world");
+  EXPECT_THAT(entry.FormatLogMessage(),
+              Eq("I0102 03:04:05.678900     451 foo.cc:1234] hello world"));
+  // These methods are not responsible for honoring `prefix()`.
+  EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+              Eq("I0102 03:04:05.678900     451 foo.cc:1234] "));
+  for (size_t sz = strlen("I0102 03:04:05.678900     451 foo.cc:1234] ") + 20;
+       sz != std::numeric_limits<size_t>::max(); sz--)
+    EXPECT_THAT("I0102 03:04:05.678900     451 foo.cc:1234] ",
+                StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+  EXPECT_THAT(entry.entry().text_message_with_prefix_and_newline(),
+              Eq("hello world\n"));
+  EXPECT_THAT(entry.entry().text_message_with_prefix_and_newline_c_str(),
+              StrEq("hello world\n"));
+  EXPECT_THAT(entry.entry().text_message_with_prefix(), Eq("hello world"));
+  EXPECT_THAT(entry.entry().text_message(), Eq("hello world"));
+}
+
+TEST(LogEntryTest, EmptyFields) {
+  LogEntryTestPeer entry("", 0, kUsePrefix, absl::LogSeverity::kInfo,
+                         "2020-01-02T03:04:05", 0, "");
+  const std::string format_message = entry.FormatLogMessage();
+  EXPECT_THAT(format_message, Eq("I0102 03:04:05.000000       0 :0] "));
+  EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000), Eq(format_message));
+  for (size_t sz = format_message.size() + 20;
+       sz != std::numeric_limits<size_t>::max(); sz--)
+    EXPECT_THAT(format_message,
+                StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+  EXPECT_THAT(entry.entry().text_message_with_prefix_and_newline(),
+              Eq("I0102 03:04:05.000000       0 :0] \n"));
+  EXPECT_THAT(entry.entry().text_message_with_prefix_and_newline_c_str(),
+              StrEq("I0102 03:04:05.000000       0 :0] \n"));
+  EXPECT_THAT(entry.entry().text_message_with_prefix(),
+              Eq("I0102 03:04:05.000000       0 :0] "));
+  EXPECT_THAT(entry.entry().text_message(), Eq(""));
+}
+
+TEST(LogEntryTest, NegativeFields) {
+  // When Abseil's minimum C++ version is C++17, this conditional can be
+  // converted to a constexpr if and the static_cast below removed.
+  if (std::is_signed<absl::LogEntry::tid_t>::value) {
+    LogEntryTestPeer entry("foo.cc", -1234, kUsePrefix,
+                           absl::LogSeverity::kInfo, "2020-01-02T03:04:05.6789",
+                           static_cast<absl::LogEntry::tid_t>(-451),
+                           "hello world");
+    EXPECT_THAT(entry.FormatLogMessage(),
+                Eq("I0102 03:04:05.678900    -451 foo.cc:-1234] hello world"));
+    EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+                Eq("I0102 03:04:05.678900    -451 foo.cc:-1234] "));
+    for (size_t sz =
+             strlen("I0102 03:04:05.678900    -451 foo.cc:-1234] ") + 20;
+         sz != std::numeric_limits<size_t>::max(); sz--)
+      EXPECT_THAT("I0102 03:04:05.678900    -451 foo.cc:-1234] ",
+                  StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline(),
+        Eq("I0102 03:04:05.678900    -451 foo.cc:-1234] hello world\n"));
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline_c_str(),
+        StrEq("I0102 03:04:05.678900    -451 foo.cc:-1234] hello world\n"));
+    EXPECT_THAT(entry.entry().text_message_with_prefix(),
+                Eq("I0102 03:04:05.678900    -451 foo.cc:-1234] hello world"));
+    EXPECT_THAT(entry.entry().text_message(), Eq("hello world"));
+  } else {
+    LogEntryTestPeer entry("foo.cc", -1234, kUsePrefix,
+                           absl::LogSeverity::kInfo, "2020-01-02T03:04:05.6789",
+                           451, "hello world");
+    EXPECT_THAT(entry.FormatLogMessage(),
+                Eq("I0102 03:04:05.678900     451 foo.cc:-1234] hello world"));
+    EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+                Eq("I0102 03:04:05.678900     451 foo.cc:-1234] "));
+    for (size_t sz =
+             strlen("I0102 03:04:05.678900     451 foo.cc:-1234] ") + 20;
+         sz != std::numeric_limits<size_t>::max(); sz--)
+      EXPECT_THAT("I0102 03:04:05.678900     451 foo.cc:-1234] ",
+                  StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline(),
+        Eq("I0102 03:04:05.678900     451 foo.cc:-1234] hello world\n"));
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline_c_str(),
+        StrEq("I0102 03:04:05.678900     451 foo.cc:-1234] hello world\n"));
+    EXPECT_THAT(entry.entry().text_message_with_prefix(),
+                Eq("I0102 03:04:05.678900     451 foo.cc:-1234] hello world"));
+    EXPECT_THAT(entry.entry().text_message(), Eq("hello world"));
+  }
+}
+
+TEST(LogEntryTest, LongFields) {
+  LogEntryTestPeer entry(
+      "I am the very model of a modern Major-General / "
+      "I've information vegetable, animal, and mineral.",
+      2147483647, kUsePrefix, absl::LogSeverity::kInfo,
+      "2020-01-02T03:04:05.678967896789", 2147483647,
+      "I know the kings of England, and I quote the fights historical / "
+      "From Marathon to Waterloo, in order categorical.");
+  EXPECT_THAT(entry.FormatLogMessage(),
+              Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+                 "modern Major-General / I've information vegetable, animal, "
+                 "and mineral.:2147483647] I know the kings of England, and I "
+                 "quote the fights historical / From Marathon to Waterloo, in "
+                 "order categorical."));
+  EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+              Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+                 "modern Major-General / I've information vegetable, animal, "
+                 "and mineral.:2147483647] "));
+  for (size_t sz =
+           strlen("I0102 03:04:05.678967 2147483647 I am the very model of a "
+                  "modern Major-General / I've information vegetable, animal, "
+                  "and mineral.:2147483647] ") +
+           20;
+       sz != std::numeric_limits<size_t>::max(); sz--)
+    EXPECT_THAT(
+        "I0102 03:04:05.678967 2147483647 I am the very model of a "
+        "modern Major-General / I've information vegetable, animal, "
+        "and mineral.:2147483647] ",
+        StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+  EXPECT_THAT(entry.entry().text_message_with_prefix_and_newline(),
+              Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+                 "modern Major-General / I've information vegetable, animal, "
+                 "and mineral.:2147483647] I know the kings of England, and I "
+                 "quote the fights historical / From Marathon to Waterloo, in "
+                 "order categorical.\n"));
+  EXPECT_THAT(
+      entry.entry().text_message_with_prefix_and_newline_c_str(),
+      StrEq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+            "modern Major-General / I've information vegetable, animal, "
+            "and mineral.:2147483647] I know the kings of England, and I "
+            "quote the fights historical / From Marathon to Waterloo, in "
+            "order categorical.\n"));
+  EXPECT_THAT(entry.entry().text_message_with_prefix(),
+              Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+                 "modern Major-General / I've information vegetable, animal, "
+                 "and mineral.:2147483647] I know the kings of England, and I "
+                 "quote the fights historical / From Marathon to Waterloo, in "
+                 "order categorical."));
+  EXPECT_THAT(
+      entry.entry().text_message(),
+      Eq("I know the kings of England, and I quote the fights historical / "
+         "From Marathon to Waterloo, in order categorical."));
+}
+
+TEST(LogEntryTest, LongNegativeFields) {
+  // When Abseil's minimum C++ version is C++17, this conditional can be
+  // converted to a constexpr if and the static_cast below removed.
+  if (std::is_signed<absl::LogEntry::tid_t>::value) {
+    LogEntryTestPeer entry(
+        "I am the very model of a modern Major-General / "
+        "I've information vegetable, animal, and mineral.",
+        -2147483647, kUsePrefix, absl::LogSeverity::kInfo,
+        "2020-01-02T03:04:05.678967896789",
+        static_cast<absl::LogEntry::tid_t>(-2147483647),
+        "I know the kings of England, and I quote the fights historical / "
+        "From Marathon to Waterloo, in order categorical.");
+    EXPECT_THAT(
+        entry.FormatLogMessage(),
+        Eq("I0102 03:04:05.678967 -2147483647 I am the very model of a "
+           "modern Major-General / I've information vegetable, animal, "
+           "and mineral.:-2147483647] I know the kings of England, and I "
+           "quote the fights historical / From Marathon to Waterloo, in "
+           "order categorical."));
+    EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+                Eq("I0102 03:04:05.678967 -2147483647 I am the very model of a "
+                   "modern Major-General / I've information vegetable, animal, "
+                   "and mineral.:-2147483647] "));
+    for (size_t sz =
+             strlen(
+                 "I0102 03:04:05.678967 -2147483647 I am the very model of a "
+                 "modern Major-General / I've information vegetable, animal, "
+                 "and mineral.:-2147483647] ") +
+             20;
+         sz != std::numeric_limits<size_t>::max(); sz--)
+      EXPECT_THAT(
+          "I0102 03:04:05.678967 -2147483647 I am the very model of a "
+          "modern Major-General / I've information vegetable, animal, "
+          "and mineral.:-2147483647] ",
+          StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline(),
+        Eq("I0102 03:04:05.678967 -2147483647 I am the very model of a "
+           "modern Major-General / I've information vegetable, animal, "
+           "and mineral.:-2147483647] I know the kings of England, and I "
+           "quote the fights historical / From Marathon to Waterloo, in "
+           "order categorical.\n"));
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline_c_str(),
+        StrEq("I0102 03:04:05.678967 -2147483647 I am the very model of a "
+              "modern Major-General / I've information vegetable, animal, "
+              "and mineral.:-2147483647] I know the kings of England, and I "
+              "quote the fights historical / From Marathon to Waterloo, in "
+              "order categorical.\n"));
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix(),
+        Eq("I0102 03:04:05.678967 -2147483647 I am the very model of a "
+           "modern Major-General / I've information vegetable, animal, "
+           "and mineral.:-2147483647] I know the kings of England, and I "
+           "quote the fights historical / From Marathon to Waterloo, in "
+           "order categorical."));
+    EXPECT_THAT(
+        entry.entry().text_message(),
+        Eq("I know the kings of England, and I quote the fights historical / "
+           "From Marathon to Waterloo, in order categorical."));
+  } else {
+    LogEntryTestPeer entry(
+        "I am the very model of a modern Major-General / "
+        "I've information vegetable, animal, and mineral.",
+        -2147483647, kUsePrefix, absl::LogSeverity::kInfo,
+        "2020-01-02T03:04:05.678967896789", 2147483647,
+        "I know the kings of England, and I quote the fights historical / "
+        "From Marathon to Waterloo, in order categorical.");
+    EXPECT_THAT(
+        entry.FormatLogMessage(),
+        Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+           "modern Major-General / I've information vegetable, animal, "
+           "and mineral.:-2147483647] I know the kings of England, and I "
+           "quote the fights historical / From Marathon to Waterloo, in "
+           "order categorical."));
+    EXPECT_THAT(entry.FormatPrefixIntoSizedBuffer(1000),
+                Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+                   "modern Major-General / I've information vegetable, animal, "
+                   "and mineral.:-2147483647] "));
+    for (size_t sz =
+             strlen(
+                 "I0102 03:04:05.678967 2147483647 I am the very model of a "
+                 "modern Major-General / I've information vegetable, animal, "
+                 "and mineral.:-2147483647] ") +
+             20;
+         sz != std::numeric_limits<size_t>::max(); sz--)
+      EXPECT_THAT(
+          "I0102 03:04:05.678967 2147483647 I am the very model of a "
+          "modern Major-General / I've information vegetable, animal, "
+          "and mineral.:-2147483647] ",
+          StartsWith(entry.FormatPrefixIntoSizedBuffer(sz)));
+
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline(),
+        Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+           "modern Major-General / I've information vegetable, animal, "
+           "and mineral.:-2147483647] I know the kings of England, and I "
+           "quote the fights historical / From Marathon to Waterloo, in "
+           "order categorical.\n"));
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix_and_newline_c_str(),
+        StrEq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+              "modern Major-General / I've information vegetable, animal, "
+              "and mineral.:-2147483647] I know the kings of England, and I "
+              "quote the fights historical / From Marathon to Waterloo, in "
+              "order categorical.\n"));
+    EXPECT_THAT(
+        entry.entry().text_message_with_prefix(),
+        Eq("I0102 03:04:05.678967 2147483647 I am the very model of a "
+           "modern Major-General / I've information vegetable, animal, "
+           "and mineral.:-2147483647] I know the kings of England, and I "
+           "quote the fights historical / From Marathon to Waterloo, in "
+           "order categorical."));
+    EXPECT_THAT(
+        entry.entry().text_message(),
+        Eq("I know the kings of England, and I quote the fights historical / "
+           "From Marathon to Waterloo, in order categorical."));
+  }
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/log_format_test.cc b/third_party/abseil-cpp/absl/log/log_format_test.cc
new file mode 100644
index 0000000000..c629fce723
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_format_test.cc
@@ -0,0 +1,1525 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <math.h>
+
+#include <iomanip>
+#include <limits>
+#include <sstream>
+#include <string>
+#include <type_traits>
+
+#ifdef __ANDROID__
+#include <android/api-level.h>
+#endif
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/log/scoped_mock_log.h"
+#include "absl/strings/match.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/string_view.h"
+
+namespace {
+using ::absl::log_internal::MatchesOstream;
+using ::absl::log_internal::TextMessage;
+using ::absl::log_internal::TextPrefix;
+
+using ::testing::AllOf;
+using ::testing::AnyOf;
+using ::testing::Eq;
+using ::testing::IsEmpty;
+using ::testing::Truly;
+using ::testing::Types;
+
+using ::testing::Each;
+using ::testing::Ge;
+using ::testing::Le;
+using ::testing::SizeIs;
+
+// Some aspects of formatting streamed data (e.g. pointer handling) are
+// implementation-defined.  Others are buggy in supported implementations.
+// These tests validate that the formatting matches that performed by a
+// `std::ostream` and also that the result is one of a list of expected formats.
+
+std::ostringstream ComparisonStream() {
+  std::ostringstream str;
+  str.setf(std::ios_base::showbase | std::ios_base::boolalpha |
+           std::ios_base::internal);
+  return str;
+}
+
+TEST(LogFormatTest, NoMessage) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int log_line = __LINE__ + 1;
+  auto do_log = [] { LOG(INFO); };
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          TextMessage(MatchesOstream(ComparisonStream())),
+          TextPrefix(Truly([=](absl::string_view msg) {
+            return absl::EndsWith(
+                msg, absl::StrCat(" log_format_test.cc:", log_line, "] "));
+          })),
+          TextMessage(IsEmpty()), ENCODED_MESSAGE(EqualsProto(R"pb()pb")))));
+
+  test_sink.StartCapturingLogs();
+  do_log();
+}
+
+template <typename T>
+class CharLogFormatTest : public testing::Test {};
+using CharTypes = Types<char, signed char, unsigned char>;
+TYPED_TEST_SUITE(CharLogFormatTest, CharTypes);
+
+TYPED_TEST(CharLogFormatTest, Printable) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = 'x';
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("x")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "x" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(CharLogFormatTest, Unprintable) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  constexpr auto value = static_cast<TypeParam>(0xeeu);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("\xee")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "\xee"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+template <typename T>
+class UnsignedIntLogFormatTest : public testing::Test {};
+using UnsignedIntTypes = Types<unsigned short, unsigned int,        // NOLINT
+                               unsigned long, unsigned long long>;  // NOLINT
+TYPED_TEST_SUITE(UnsignedIntLogFormatTest, UnsignedIntTypes);
+
+TYPED_TEST(UnsignedIntLogFormatTest, Positive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = 224;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("224")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "224" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(UnsignedIntLogFormatTest, BitfieldPositive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const struct {
+    TypeParam bits : 6;
+  } value{42};
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value.bits;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("42")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "42" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value.bits;
+}
+
+template <typename T>
+class SignedIntLogFormatTest : public testing::Test {};
+using SignedIntTypes =
+    Types<signed short, signed int, signed long, signed long long>;  // NOLINT
+TYPED_TEST_SUITE(SignedIntLogFormatTest, SignedIntTypes);
+
+TYPED_TEST(SignedIntLogFormatTest, Positive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = 224;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("224")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "224" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(SignedIntLogFormatTest, Negative) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = -112;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("-112")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "-112"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(SignedIntLogFormatTest, BitfieldPositive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const struct {
+    TypeParam bits : 6;
+  } value{21};
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value.bits;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("21")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "21" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value.bits;
+}
+
+TYPED_TEST(SignedIntLogFormatTest, BitfieldNegative) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const struct {
+    TypeParam bits : 6;
+  } value{-21};
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value.bits;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("-21")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "-21" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value.bits;
+}
+
+// Ignore these test cases on GCC due to "is too small to hold all values ..."
+// warning.
+#if !defined(__GNUC__) || defined(__clang__)
+// The implementation may choose a signed or unsigned integer type to represent
+// this enum, so it may be tested by either `UnsignedEnumLogFormatTest` or
+// `SignedEnumLogFormatTest`.
+enum MyUnsignedEnum {
+  MyUnsignedEnum_ZERO = 0,
+  MyUnsignedEnum_FORTY_TWO = 42,
+  MyUnsignedEnum_TWO_HUNDRED_TWENTY_FOUR = 224,
+};
+enum MyUnsignedIntEnum : unsigned int {
+  MyUnsignedIntEnum_ZERO = 0,
+  MyUnsignedIntEnum_FORTY_TWO = 42,
+  MyUnsignedIntEnum_TWO_HUNDRED_TWENTY_FOUR = 224,
+};
+
+template <typename T>
+class UnsignedEnumLogFormatTest : public testing::Test {};
+using UnsignedEnumTypes = std::conditional<
+    std::is_signed<std::underlying_type<MyUnsignedEnum>::type>::value,
+    Types<MyUnsignedIntEnum>, Types<MyUnsignedEnum, MyUnsignedIntEnum>>::type;
+TYPED_TEST_SUITE(UnsignedEnumLogFormatTest, UnsignedEnumTypes);
+
+TYPED_TEST(UnsignedEnumLogFormatTest, Positive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = static_cast<TypeParam>(224);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("224")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "224" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(UnsignedEnumLogFormatTest, BitfieldPositive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const struct {
+    TypeParam bits : 6;
+  } value{static_cast<TypeParam>(42)};
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value.bits;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("42")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "42" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value.bits;
+}
+
+enum MySignedEnum {
+  MySignedEnum_NEGATIVE_ONE_HUNDRED_TWELVE = -112,
+  MySignedEnum_NEGATIVE_TWENTY_ONE = -21,
+  MySignedEnum_ZERO = 0,
+  MySignedEnum_TWENTY_ONE = 21,
+  MySignedEnum_TWO_HUNDRED_TWENTY_FOUR = 224,
+};
+enum MySignedIntEnum : signed int {
+  MySignedIntEnum_NEGATIVE_ONE_HUNDRED_TWELVE = -112,
+  MySignedIntEnum_NEGATIVE_TWENTY_ONE = -21,
+  MySignedIntEnum_ZERO = 0,
+  MySignedIntEnum_TWENTY_ONE = 21,
+  MySignedIntEnum_TWO_HUNDRED_TWENTY_FOUR = 224,
+};
+
+template <typename T>
+class SignedEnumLogFormatTest : public testing::Test {};
+using SignedEnumTypes = std::conditional<
+    std::is_signed<std::underlying_type<MyUnsignedEnum>::type>::value,
+    Types<MyUnsignedEnum, MySignedEnum, MySignedIntEnum>,
+    Types<MySignedEnum, MySignedIntEnum>>::type;
+TYPED_TEST_SUITE(SignedEnumLogFormatTest, SignedEnumTypes);
+
+TYPED_TEST(SignedEnumLogFormatTest, Positive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = static_cast<TypeParam>(224);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("224")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "224" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(SignedEnumLogFormatTest, Negative) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = static_cast<TypeParam>(-112);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("-112")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "-112"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(SignedEnumLogFormatTest, BitfieldPositive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const struct {
+    TypeParam bits : 6;
+  } value{static_cast<TypeParam>(21)};
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value.bits;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("21")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "21" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value.bits;
+}
+
+TYPED_TEST(SignedEnumLogFormatTest, BitfieldNegative) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const struct {
+    TypeParam bits : 6;
+  } value{static_cast<TypeParam>(-21)};
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value.bits;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("-21")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "-21" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value.bits;
+}
+#endif
+
+TEST(FloatLogFormatTest, Positive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const float value = 6.02e23f;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("6.02e+23")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "6.02e+23"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(FloatLogFormatTest, Negative) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const float value = -6.02e23f;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("-6.02e+23")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "-6.02e+23"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(FloatLogFormatTest, NegativeExponent) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const float value = 6.02e-23f;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("6.02e-23")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "6.02e-23"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(DoubleLogFormatTest, Positive) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 6.02e23;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("6.02e+23")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "6.02e+23"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(DoubleLogFormatTest, Negative) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = -6.02e23;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("-6.02e+23")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "-6.02e+23"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(DoubleLogFormatTest, NegativeExponent) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 6.02e-23;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("6.02e-23")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "6.02e-23"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+template <typename T>
+class FloatingPointLogFormatTest : public testing::Test {};
+using FloatingPointTypes = Types<float, double>;
+TYPED_TEST_SUITE(FloatingPointLogFormatTest, FloatingPointTypes);
+
+TYPED_TEST(FloatingPointLogFormatTest, Zero) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = 0.0;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("0")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "0" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(FloatingPointLogFormatTest, Integer) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = 1.0;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("1")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "1" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(FloatingPointLogFormatTest, Infinity) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = std::numeric_limits<TypeParam>::infinity();
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(AnyOf(Eq("inf"), Eq("Inf"))),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "inf" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(FloatingPointLogFormatTest, NegativeInfinity) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = -std::numeric_limits<TypeParam>::infinity();
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(AnyOf(Eq("-inf"), Eq("-Inf"))),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "-inf"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(FloatingPointLogFormatTest, NaN) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = std::numeric_limits<TypeParam>::quiet_NaN();
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(AnyOf(Eq("nan"), Eq("NaN"))),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "nan" })pb")))));
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(FloatingPointLogFormatTest, NegativeNaN) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value =
+      std::copysign(std::numeric_limits<TypeParam>::quiet_NaN(), -1.0);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          TextMessage(MatchesOstream(comparison_stream)),
+          TextMessage(AnyOf(Eq("-nan"), Eq("nan"), Eq("NaN"), Eq("-nan(ind)"))),
+          ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "-nan" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+template <typename T>
+class VoidPtrLogFormatTest : public testing::Test {};
+using VoidPtrTypes = Types<void *, const void *>;
+TYPED_TEST_SUITE(VoidPtrLogFormatTest, VoidPtrTypes);
+
+TYPED_TEST(VoidPtrLogFormatTest, Null) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = nullptr;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(AnyOf(Eq("(nil)"), Eq("0"), Eq("0x0"),
+                                   Eq("00000000"), Eq("0000000000000000"))))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(VoidPtrLogFormatTest, NonNull) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = reinterpret_cast<TypeParam>(0xdeadbeefULL);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(AnyOf(Eq("0xdeadbeef"), Eq("DEADBEEF"),
+                                           Eq("00000000DEADBEEF"))),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "0xdeadbeef"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+template <typename T>
+class VolatileVoidPtrLogFormatTest : public testing::Test {};
+using VolatileVoidPtrTypes = Types<volatile void *, const volatile void *>;
+TYPED_TEST_SUITE(VolatileVoidPtrLogFormatTest, VolatileVoidPtrTypes);
+
+TYPED_TEST(VolatileVoidPtrLogFormatTest, Null) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = nullptr;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("false")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "false"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(VolatileVoidPtrLogFormatTest, NonNull) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const TypeParam value = reinterpret_cast<TypeParam>(0xdeadbeefLL);
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("true")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "true"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+template <typename T>
+class CharPtrLogFormatTest : public testing::Test {};
+using CharPtrTypes = Types<char *, const char *>;
+TYPED_TEST_SUITE(CharPtrLogFormatTest, CharPtrTypes);
+
+TYPED_TEST(CharPtrLogFormatTest, Null) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  // Streaming `([cv] char *)nullptr` into a `std::ostream` is UB, and some C++
+  // standard library implementations choose to crash.  We take measures to log
+  // something useful instead of crashing, even when that differs from the
+  // standard library in use (and thus the behavior of `std::ostream`).
+  const TypeParam value = nullptr;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          // `MatchesOstream` deliberately omitted since we deliberately differ.
+          TextMessage(Eq("(null)")),
+          ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "(null)" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TYPED_TEST(CharPtrLogFormatTest, NonNull) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  char data[] = "value";
+  const TypeParam value = data;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("value")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "value"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(BoolLogFormatTest, True) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const bool value = true;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("true")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "true"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(BoolLogFormatTest, False) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const bool value = false;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("false")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "false"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(LogFormatTest, StringLiteral) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << "value";
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("value")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            literal: "value"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << "value";
+}
+
+TEST(LogFormatTest, CharArray) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  char value[] = "value";
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("value")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "value"
+                                                             })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+class CustomClass {};
+std::ostream& operator<<(std::ostream& os, const CustomClass&) {
+  return os << "CustomClass{}";
+}
+
+TEST(LogFormatTest, Custom) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  CustomClass value;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("CustomClass{}")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "CustomClass{}"
+                                                          })pb")))));
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+class CustomClassNonCopyable {
+ public:
+  CustomClassNonCopyable() = default;
+  CustomClassNonCopyable(const CustomClassNonCopyable&) = delete;
+  CustomClassNonCopyable& operator=(const CustomClassNonCopyable&) = delete;
+};
+std::ostream& operator<<(std::ostream& os, const CustomClassNonCopyable&) {
+  return os << "CustomClassNonCopyable{}";
+}
+
+TEST(LogFormatTest, CustomNonCopyable) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  CustomClassNonCopyable value;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("CustomClassNonCopyable{}")),
+                 ENCODED_MESSAGE(EqualsProto(
+                     R"pb(value { str: "CustomClassNonCopyable{}" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value;
+}
+
+TEST(ManipulatorLogFormatTest, BoolAlphaTrue) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const bool value = true;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::noboolalpha << value << " "  //
+                    << std::boolalpha << value << " "    //
+                    << std::noboolalpha << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("1 true 1")),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { str: "1" }
+                                  value { literal: " " }
+                                  value { str: "true" }
+                                  value { literal: " " }
+                                  value { str: "1" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::noboolalpha << value << " "  //
+            << std::boolalpha << value << " "    //
+            << std::noboolalpha << value;
+}
+
+TEST(ManipulatorLogFormatTest, BoolAlphaFalse) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const bool value = false;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::noboolalpha << value << " "  //
+                    << std::boolalpha << value << " "    //
+                    << std::noboolalpha << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("0 false 0")),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { str: "0" }
+                                  value { literal: " " }
+                                  value { str: "false" }
+                                  value { literal: " " }
+                                  value { str: "0" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::noboolalpha << value << " "  //
+            << std::boolalpha << value << " "    //
+            << std::noboolalpha << value;
+}
+
+TEST(ManipulatorLogFormatTest, ShowPoint) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 77.0;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::noshowpoint << value << " "  //
+                    << std::showpoint << value << " "    //
+                    << std::noshowpoint << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77 77.0000 77")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "77" }
+                                                  value { literal: " " }
+                                                  value { str: "77.0000" }
+                                                  value { literal: " " }
+                                                  value { str: "77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::noshowpoint << value << " "  //
+            << std::showpoint << value << " "    //
+            << std::noshowpoint << value;
+}
+
+TEST(ManipulatorLogFormatTest, ShowPos) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::noshowpos << value << " "  //
+                    << std::showpos << value << " "    //
+                    << std::noshowpos << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77 +77 77")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "77" }
+                                                  value { literal: " " }
+                                                  value { str: "+77" }
+                                                  value { literal: " " }
+                                                  value { str: "77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::noshowpos << value << " "  //
+            << std::showpos << value << " "    //
+            << std::noshowpos << value;
+}
+
+TEST(ManipulatorLogFormatTest, UppercaseFloat) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 7.7e7;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::nouppercase << value << " "  //
+                    << std::uppercase << value << " "    //
+                    << std::nouppercase << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("7.7e+07 7.7E+07 7.7e+07")),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { str: "7.7e+07" }
+                                  value { literal: " " }
+                                  value { str: "7.7E+07" }
+                                  value { literal: " " }
+                                  value { str: "7.7e+07" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::nouppercase << value << " "  //
+            << std::uppercase << value << " "    //
+            << std::nouppercase << value;
+}
+
+TEST(ManipulatorLogFormatTest, Hex) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 0x77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::hex << value;
+
+  EXPECT_CALL(
+      test_sink, Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                            TextMessage(Eq("0x77")),
+                            ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                               str: "0x77"
+                                                             })pb")))));
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::hex << value;
+}
+
+TEST(ManipulatorLogFormatTest, Oct) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 077;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::oct << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("077")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "077" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::oct << value;
+}
+
+TEST(ManipulatorLogFormatTest, Dec) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::hex << std::dec << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::hex << std::dec << value;
+}
+
+TEST(ManipulatorLogFormatTest, ShowbaseHex) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 0x77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::hex                         //
+                    << std::noshowbase << value << " "  //
+                    << std::showbase << value << " "    //
+                    << std::noshowbase << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77 0x77 77")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "77" }
+                                                  value { literal: " " }
+                                                  value { str: "0x77" }
+                                                  value { literal: " " }
+                                                  value { str: "77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::hex                         //
+            << std::noshowbase << value << " "  //
+            << std::showbase << value << " "    //
+            << std::noshowbase << value;
+}
+
+TEST(ManipulatorLogFormatTest, ShowbaseOct) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 077;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::oct                         //
+                    << std::noshowbase << value << " "  //
+                    << std::showbase << value << " "    //
+                    << std::noshowbase << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77 077 77")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "77" }
+                                                  value { literal: " " }
+                                                  value { str: "077" }
+                                                  value { literal: " " }
+                                                  value { str: "77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::oct                         //
+            << std::noshowbase << value << " "  //
+            << std::showbase << value << " "    //
+            << std::noshowbase << value;
+}
+
+TEST(ManipulatorLogFormatTest, UppercaseHex) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 0xbeef;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream                        //
+      << std::hex                          //
+      << std::nouppercase << value << " "  //
+      << std::uppercase << value << " "    //
+      << std::nouppercase << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("0xbeef 0XBEEF 0xbeef")),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { str: "0xbeef" }
+                                  value { literal: " " }
+                                  value { str: "0XBEEF" }
+                                  value { literal: " " }
+                                  value { str: "0xbeef" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::hex                          //
+            << std::nouppercase << value << " "  //
+            << std::uppercase << value << " "    //
+            << std::nouppercase << value;
+}
+
+TEST(ManipulatorLogFormatTest, FixedFloat) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 7.7e7;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::fixed << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77000000.000000")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "77000000.000000"
+                                                  })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::fixed << value;
+}
+
+TEST(ManipulatorLogFormatTest, ScientificFloat) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 7.7e7;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::scientific << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("7.700000e+07")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "7.700000e+07"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::scientific << value;
+}
+
+#if defined(__BIONIC__) && (!defined(__ANDROID_API__) || __ANDROID_API__ < 22)
+// Bionic doesn't support `%a` until API 22, so this prints 'a' even if the
+// C++ standard library implements it correctly (by forwarding to printf).
+#elif defined(__GLIBCXX__) && __cplusplus < 201402L
+// libstdc++ shipped C++11 support without `std::hexfloat`.
+#else
+TEST(ManipulatorLogFormatTest, FixedAndScientificFloat) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 7.7e7;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::setiosflags(std::ios_base::scientific |
+                                        std::ios_base::fixed)
+                    << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(AnyOf(Eq("0x1.25bb50p+26"), Eq("0x1.25bb5p+26"),
+                                   Eq("0x1.25bb500000000p+26"))),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(
+                   value { str: "0x1.25bb5p+26" })pb")))));
+
+  test_sink.StartCapturingLogs();
+
+  // This combination should mean the same thing as `std::hexfloat`.
+  LOG(INFO) << std::setiosflags(std::ios_base::scientific |
+                                std::ios_base::fixed)
+            << value;
+}
+#endif
+
+#if defined(__BIONIC__) && (!defined(__ANDROID_API__) || __ANDROID_API__ < 22)
+// Bionic doesn't support `%a` until API 22, so this prints 'a' even if the C++
+// standard library supports `std::hexfloat` (by forwarding to printf).
+#elif defined(__GLIBCXX__) && __cplusplus < 201402L
+// libstdc++ shipped C++11 support without `std::hexfloat`.
+#else
+TEST(ManipulatorLogFormatTest, HexfloatFloat) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 7.7e7;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::hexfloat << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(AnyOf(Eq("0x1.25bb50p+26"), Eq("0x1.25bb5p+26"),
+                                   Eq("0x1.25bb500000000p+26"))),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(
+                   value { str: "0x1.25bb5p+26" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::hexfloat << value;
+}
+#endif
+
+TEST(ManipulatorLogFormatTest, DefaultFloatFloat) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 7.7e7;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::hexfloat << std::defaultfloat << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("7.7e+07")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "7.7e+07"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::hexfloat << std::defaultfloat << value;
+}
+
+TEST(ManipulatorLogFormatTest, Ends) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::ends;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq(absl::string_view("\0", 1))),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "\0" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::ends;
+}
+
+TEST(ManipulatorLogFormatTest, Endl) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::endl;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("\n")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::endl;
+}
+
+TEST(ManipulatorLogFormatTest, SetIosFlags) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 0x77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::resetiosflags(std::ios_base::basefield)
+                    << std::setiosflags(std::ios_base::hex) << value << " "  //
+                    << std::resetiosflags(std::ios_base::basefield)
+                    << std::setiosflags(std::ios_base::dec) << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          TextMessage(MatchesOstream(comparison_stream)),
+          TextMessage(Eq("0x77 119")),
+          // `std::setiosflags` and `std::resetiosflags` aren't manipulators.
+          // We're unable to distinguish their return type(s) from arbitrary
+          // user-defined types and thus don't suppress the empty str value.
+          ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "0x77" }
+                                           value { literal: " " }
+                                           value { str: "119" }
+          )pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::resetiosflags(std::ios_base::basefield)
+            << std::setiosflags(std::ios_base::hex) << value << " "  //
+            << std::resetiosflags(std::ios_base::basefield)
+            << std::setiosflags(std::ios_base::dec) << value;
+}
+
+TEST(ManipulatorLogFormatTest, SetBase) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 0x77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::setbase(16) << value << " "  //
+                    << std::setbase(0) << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("0x77 119")),
+                 // `std::setbase` isn't a manipulator.  We're unable to
+                 // distinguish its return type from arbitrary user-defined
+                 // types and thus don't suppress the empty str value.
+                 ENCODED_MESSAGE(EqualsProto(
+                     R"pb(value { str: "0x77" }
+                          value { literal: " " }
+                          value { str: "119" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::setbase(16) << value << " "  //
+            << std::setbase(0) << value;
+}
+
+TEST(ManipulatorLogFormatTest, SetPrecision) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 6.022140857e23;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::setprecision(4) << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          TextMessage(MatchesOstream(comparison_stream)),
+          TextMessage(Eq("6.022e+23")),
+          // `std::setprecision` isn't a manipulator.  We're unable to
+          // distinguish its return type from arbitrary user-defined
+          // types and thus don't suppress the empty str value.
+          ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "6.022e+23" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::setprecision(4) << value;
+}
+
+TEST(ManipulatorLogFormatTest, SetPrecisionOverflow) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const double value = 6.022140857e23;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::setprecision(200) << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("602214085700000015187968")),
+                 ENCODED_MESSAGE(EqualsProto(
+                     R"pb(value { str: "602214085700000015187968" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::setprecision(200) << value;
+}
+
+TEST(ManipulatorLogFormatTest, SetW) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::setw(8) << value;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          TextMessage(MatchesOstream(comparison_stream)),
+          TextMessage(Eq("      77")),
+          // `std::setw` isn't a manipulator.  We're unable to
+          // distinguish its return type from arbitrary user-defined
+          // types and thus don't suppress the empty str value.
+          ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "      77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::setw(8) << value;
+}
+
+TEST(ManipulatorLogFormatTest, Left) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = -77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::left << std::setw(8) << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("-77     ")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "-77     "
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::left << std::setw(8) << value;
+}
+
+TEST(ManipulatorLogFormatTest, Right) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = -77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::right << std::setw(8) << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("     -77")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "     -77"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::right << std::setw(8) << value;
+}
+
+TEST(ManipulatorLogFormatTest, Internal) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = -77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::internal << std::setw(8) << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("-     77")),
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "-     77"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::internal << std::setw(8) << value;
+}
+
+TEST(ManipulatorLogFormatTest, SetFill) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  const int value = 77;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << std::setfill('0') << std::setw(8) << value;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("00000077")),
+                         // `std::setfill` isn't a manipulator.  We're
+                         // unable to distinguish its return
+                         // type from arbitrary user-defined types and
+                         // thus don't suppress the empty str value.
+                         ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                            str: "00000077"
+                                                          })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::setfill('0') << std::setw(8) << value;
+}
+
+class FromCustomClass {};
+std::ostream& operator<<(std::ostream& os, const FromCustomClass&) {
+  return os << "FromCustomClass{}" << std::hex;
+}
+
+TEST(ManipulatorLogFormatTest, FromCustom) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  FromCustomClass value;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value << " " << 0x77;
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                         TextMessage(Eq("FromCustomClass{} 0x77")),
+                         ENCODED_MESSAGE(EqualsProto(
+                             R"pb(value { str: "FromCustomClass{}" }
+                                  value { literal: " " }
+                                  value { str: "0x77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value << " " << 0x77;
+}
+
+class StreamsNothing {};
+std::ostream& operator<<(std::ostream& os, const StreamsNothing&) { return os; }
+
+TEST(ManipulatorLogFormatTest, CustomClassStreamsNothing) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  StreamsNothing value;
+  auto comparison_stream = ComparisonStream();
+  comparison_stream << value << 77;
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(MatchesOstream(comparison_stream)),
+                 TextMessage(Eq("77")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "77" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << value << 77;
+}
+
+// Tests that verify the behavior when more data are streamed into a `LOG`
+// statement than fit in the buffer.
+// Structured logging scenario is tested in other unit tests since the output is
+// significantly different.
+TEST(OverflowTest, TruncatesStrings) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  // This message is too long and should be truncated to some unspecified size
+  // no greater than the buffer size but not too much less either. It should be
+  // truncated rather than discarded.
+  constexpr size_t buffer_size = 15000;
+
+  EXPECT_CALL(test_sink,
+              Send(TextMessage(
+                  AllOf(SizeIs(AllOf(Ge(buffer_size - 256), Le(buffer_size))),
+                        Each(Eq('x'))))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << std::string(2 * buffer_size, 'x');
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/log_macro_hygiene_test.cc b/third_party/abseil-cpp/absl/log/log_macro_hygiene_test.cc
new file mode 100644
index 0000000000..ab6461f5eb
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_macro_hygiene_test.cc
@@ -0,0 +1,171 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/log.h"
+#include "absl/log/scoped_mock_log.h"
+
+namespace {
+using ::testing::_;
+using ::testing::Eq;
+
+namespace not_absl {
+
+class Dummy {
+ public:
+  Dummy() {}
+
+ private:
+  Dummy(const Dummy&) = delete;
+  Dummy& operator=(const Dummy&) = delete;
+};
+
+// This line tests that local definitions of INFO, WARNING, ERROR, and
+// etc don't shadow the global ones used by the logging macros.  If
+// they do, the LOG() calls in the tests won't compile, catching the
+// bug.
+const Dummy INFO, WARNING, ERROR, FATAL, NUM_SEVERITIES;
+
+// These makes sure that the uses of same-named types in the
+// implementation of the logging macros are fully qualified.
+class string {};
+class vector {};
+class LogMessage {};
+class LogMessageFatal {};
+class LogMessageQuietlyFatal {};
+class LogMessageVoidify {};
+class LogSink {};
+class NullStream {};
+class NullStreamFatal {};
+
+}  // namespace not_absl
+
+using namespace not_absl;  // NOLINT
+
+// Tests for LOG(LEVEL(()).
+
+TEST(LogHygieneTest, WorksForQualifiedSeverity) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  ::testing::InSequence seq;
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, _, "To INFO"));
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kWarning, _, "To WARNING"));
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kError, _, "To ERROR"));
+
+  test_sink.StartCapturingLogs();
+  // Note that LOG(LEVEL()) expects the severity as a run-time
+  // expression (as opposed to a compile-time constant).  Hence we
+  // test that :: is allowed before INFO, etc.
+  LOG(LEVEL(absl::LogSeverity::kInfo)) << "To INFO";
+  LOG(LEVEL(absl::LogSeverity::kWarning)) << "To WARNING";
+  LOG(LEVEL(absl::LogSeverity::kError)) << "To ERROR";
+}
+
+TEST(LogHygieneTest, WorksWithAlternativeINFOSymbol) {
+  const double INFO ABSL_ATTRIBUTE_UNUSED = 7.77;
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, _, "Hello world"));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << "Hello world";
+}
+
+TEST(LogHygieneTest, WorksWithAlternativeWARNINGSymbol) {
+  const double WARNING ABSL_ATTRIBUTE_UNUSED = 7.77;
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kWarning, _, "Hello world"));
+
+  test_sink.StartCapturingLogs();
+  LOG(WARNING) << "Hello world";
+}
+
+TEST(LogHygieneTest, WorksWithAlternativeERRORSymbol) {
+  const double ERROR ABSL_ATTRIBUTE_UNUSED = 7.77;
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kError, _, "Hello world"));
+
+  test_sink.StartCapturingLogs();
+  LOG(ERROR) << "Hello world";
+}
+
+TEST(LogHygieneTest, WorksWithAlternativeLEVELSymbol) {
+  const double LEVEL ABSL_ATTRIBUTE_UNUSED = 7.77;
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kError, _, "Hello world"));
+
+  test_sink.StartCapturingLogs();
+  LOG(LEVEL(absl::LogSeverity::kError)) << "Hello world";
+}
+
+#define INFO Bogus
+#ifdef NDEBUG
+constexpr bool IsOptimized = false;
+#else
+constexpr bool IsOptimized = true;
+#endif
+
+TEST(LogHygieneTest, WorksWithINFODefined) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, _, "Hello world"))
+      .Times(2 + (IsOptimized ? 2 : 0));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << "Hello world";
+  LOG_IF(INFO, true) << "Hello world";
+
+  DLOG(INFO) << "Hello world";
+  DLOG_IF(INFO, true) << "Hello world";
+}
+
+#undef INFO
+
+TEST(LogHygieneTest, ExpressionEvaluationInLEVELSeverity) {
+  auto i = static_cast<int>(absl::LogSeverity::kInfo);
+  LOG(LEVEL(++i)) << "hello world";  // NOLINT
+  EXPECT_THAT(i, Eq(static_cast<int>(absl::LogSeverity::kInfo) + 1));
+}
+
+TEST(LogHygieneTest, ExpressionEvaluationInStreamedMessage) {
+  int i = 0;
+  LOG(INFO) << ++i;
+  EXPECT_THAT(i, 1);
+  LOG_IF(INFO, false) << ++i;
+  EXPECT_THAT(i, 1);
+}
+
+// Tests that macros are usable in unbraced switch statements.
+// -----------------------------------------------------------
+
+class UnbracedSwitchCompileTest {
+  static void Log() {
+    switch (0) {
+      case 0:
+        LOG(INFO);
+        break;
+      default:
+        break;
+    }
+  }
+};
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/log_modifier_methods_test.cc b/third_party/abseil-cpp/absl/log/log_modifier_methods_test.cc
new file mode 100644
index 0000000000..42e13b1ba2
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_modifier_methods_test.cc
@@ -0,0 +1,233 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <errno.h>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/log/internal/test_actions.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/log/log_sink.h"
+#include "absl/log/scoped_mock_log.h"
+#include "absl/strings/match.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace {
+#if GTEST_HAS_DEATH_TEST
+using ::absl::log_internal::DeathTestExpectedLogging;
+using ::absl::log_internal::DeathTestUnexpectedLogging;
+using ::absl::log_internal::DeathTestValidateExpectations;
+using ::absl::log_internal::DiedOfQFatal;
+#endif
+using ::absl::log_internal::LogSeverity;
+using ::absl::log_internal::Prefix;
+using ::absl::log_internal::SourceBasename;
+using ::absl::log_internal::SourceFilename;
+using ::absl::log_internal::SourceLine;
+using ::absl::log_internal::Stacktrace;
+using ::absl::log_internal::TextMessage;
+using ::absl::log_internal::TextMessageWithPrefix;
+using ::absl::log_internal::TextMessageWithPrefixAndNewline;
+using ::absl::log_internal::TextPrefix;
+using ::absl::log_internal::ThreadID;
+using ::absl::log_internal::Timestamp;
+using ::absl::log_internal::Verbosity;
+
+using ::testing::AllOf;
+using ::testing::AnyNumber;
+using ::testing::AnyOf;
+using ::testing::Eq;
+using ::testing::IsEmpty;
+using ::testing::IsFalse;
+using ::testing::Truly;
+
+TEST(TailCallsModifiesTest, AtLocationFileLine) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(
+          // The metadata should change:
+          SourceFilename(Eq("/my/very/very/very_long_source_file.cc")),
+          SourceBasename(Eq("very_long_source_file.cc")), SourceLine(Eq(777)),
+          // The logged line should change too, even though the prefix must
+          // grow to fit the new metadata.
+          TextMessageWithPrefix(Truly([](absl::string_view msg) {
+            return absl::EndsWith(msg,
+                                  " very_long_source_file.cc:777] hello world");
+          })))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).AtLocation("/my/very/very/very_long_source_file.cc", 777)
+      << "hello world";
+}
+
+TEST(TailCallsModifiesTest, NoPrefix) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(AllOf(Prefix(IsFalse()), TextPrefix(IsEmpty()),
+                                    TextMessageWithPrefix(Eq("hello world")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).NoPrefix() << "hello world";
+}
+
+TEST(TailCallsModifiesTest, NoPrefixNoMessageNoShirtNoShoesNoService) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(Prefix(IsFalse()), TextPrefix(IsEmpty()),
+                         TextMessageWithPrefix(IsEmpty()),
+                         TextMessageWithPrefixAndNewline(Eq("\n")))));
+  test_sink.StartCapturingLogs();
+  LOG(INFO).NoPrefix();
+}
+
+TEST(TailCallsModifiesTest, WithVerbosity) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(Verbosity(Eq(2))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).WithVerbosity(2) << "hello world";
+}
+
+TEST(TailCallsModifiesTest, WithVerbosityNoVerbosity) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink,
+              Send(Verbosity(Eq(absl::LogEntry::kNoVerbosityLevel))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).WithVerbosity(2).WithVerbosity(absl::LogEntry::kNoVerbosityLevel)
+      << "hello world";
+}
+
+TEST(TailCallsModifiesTest, WithTimestamp) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(Timestamp(Eq(absl::UnixEpoch()))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).WithTimestamp(absl::UnixEpoch()) << "hello world";
+}
+
+TEST(TailCallsModifiesTest, WithThreadID) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink,
+              Send(AllOf(ThreadID(Eq(absl::LogEntry::tid_t{1234})))));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).WithThreadID(1234) << "hello world";
+}
+
+TEST(TailCallsModifiesTest, WithMetadataFrom) {
+  class ForwardingLogSink : public absl::LogSink {
+   public:
+    void Send(const absl::LogEntry &entry) override {
+      LOG(LEVEL(entry.log_severity())).WithMetadataFrom(entry)
+          << "forwarded: " << entry.text_message();
+    }
+  } forwarding_sink;
+
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("fake/file")), SourceBasename(Eq("file")),
+                 SourceLine(Eq(123)), Prefix(IsFalse()),
+                 LogSeverity(Eq(absl::LogSeverity::kWarning)),
+                 Timestamp(Eq(absl::UnixEpoch())),
+                 ThreadID(Eq(absl::LogEntry::tid_t{456})),
+                 TextMessage(Eq("forwarded: hello world")), Verbosity(Eq(7)),
+                 ENCODED_MESSAGE(
+                     EqualsProto(R"pb(value { literal: "forwarded: " }
+                                      value { str: "hello world" })pb")))));
+
+  test_sink.StartCapturingLogs();
+  LOG(WARNING)
+          .AtLocation("fake/file", 123)
+          .NoPrefix()
+          .WithTimestamp(absl::UnixEpoch())
+          .WithThreadID(456)
+          .WithVerbosity(7)
+          .ToSinkOnly(&forwarding_sink)
+      << "hello world";
+}
+
+TEST(TailCallsModifiesTest, WithPerror) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(TextMessage(AnyOf(Eq("hello world: Bad file number [9]"),
+                                   Eq("hello world: Bad file descriptor [9]"),
+                                   Eq("hello world: Bad file descriptor [8]"))),
+                 ENCODED_MESSAGE(
+                     AnyOf(EqualsProto(R"pb(value { literal: "hello world" }
+                                            value { literal: ": " }
+                                            value { str: "Bad file number" }
+                                            value { literal: " [" }
+                                            value { str: "9" }
+                                            value { literal: "]" })pb"),
+                           EqualsProto(R"pb(value { literal: "hello world" }
+                                            value { literal: ": " }
+                                            value { str: "Bad file descriptor" }
+                                            value { literal: " [" }
+                                            value { str: "9" }
+                                            value { literal: "]" })pb"),
+                           EqualsProto(R"pb(value { literal: "hello world" }
+                                            value { literal: ": " }
+                                            value { str: "Bad file descriptor" }
+                                            value { literal: " [" }
+                                            value { str: "8" }
+                                            value { literal: "]" })pb"))))));
+
+  test_sink.StartCapturingLogs();
+  errno = EBADF;
+  LOG(INFO).WithPerror() << "hello world";
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST(ModifierMethodDeathTest, ToSinkOnlyQFatal) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink(
+            absl::MockLogDefault::kDisallowUnexpected);
+
+        auto do_log = [&test_sink] {
+          LOG(QFATAL).ToSinkOnly(&test_sink.UseAsLocalSink()) << "hello world";
+        };
+
+        EXPECT_CALL(test_sink, Send)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        EXPECT_CALL(test_sink, Send(AllOf(TextMessage(Eq("hello world")),
+                                          Stacktrace(IsEmpty()))))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        do_log();
+      },
+      DiedOfQFatal, DeathTestValidateExpectations());
+}
+#endif
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/log_sink.cc b/third_party/abseil-cpp/absl/log/log_sink.cc
new file mode 100644
index 0000000000..01d7ca8251
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_sink.cc
@@ -0,0 +1,23 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/log_sink.h"
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+void LogSink::KeyFunction() const {}
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/log_sink.h b/third_party/abseil-cpp/absl/log/log_sink.h
new file mode 100644
index 0000000000..9bfa6f8624
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_sink.h
@@ -0,0 +1,64 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_sink.h
+// -----------------------------------------------------------------------------
+//
+// This header declares the interface class `absl::LogSink`.
+
+#ifndef ABSL_LOG_LOG_SINK_H_
+#define ABSL_LOG_LOG_SINK_H_
+
+#include "absl/base/config.h"
+#include "absl/log/log_entry.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// absl::LogSink
+//
+// `absl::LogSink` is an interface which can be extended to intercept and
+// process particular messages (with `LOG.ToSinkOnly()` or
+// `LOG.ToSinkAlso()`) or all messages (if registered with
+// `absl::AddLogSink`).  Implementations must be thread-safe, and should take
+// care not to take any locks that might be held by the `LOG` caller.
+class LogSink {
+ public:
+  virtual ~LogSink() = default;
+
+  // LogSink::Send()
+  //
+  // `Send` is called synchronously during the log statement.
+  //
+  // It is safe to use `LOG` within an implementation of `Send`.  `ToSinkOnly`
+  // and `ToSinkAlso` are safe in general but can be used to create an infinite
+  // loop if you try.
+  virtual void Send(const absl::LogEntry& entry) = 0;
+
+  // LogSink::Flush()
+  //
+  // Sinks that buffer messages should override this method to flush the buffer
+  // and return.
+  virtual void Flush() {}
+
+ private:
+  // https://lld.llvm.org/missingkeyfunction.html#missing-key-function
+  virtual void KeyFunction() const final;  // NOLINT(readability/inheritance)
+};
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_SINK_H_
diff --git a/third_party/abseil-cpp/absl/log/log_sink_registry.h b/third_party/abseil-cpp/absl/log/log_sink_registry.h
new file mode 100644
index 0000000000..bf76cceeae
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_sink_registry.h
@@ -0,0 +1,61 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_sink_registry.h
+// -----------------------------------------------------------------------------
+//
+// This header declares APIs to operate on global set of registered log sinks.
+
+#ifndef ABSL_LOG_LOG_SINK_REGISTRY_H_
+#define ABSL_LOG_LOG_SINK_REGISTRY_H_
+
+#include "absl/base/config.h"
+#include "absl/log/internal/log_sink_set.h"
+#include "absl/log/log_sink.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// AddLogSink(), RemoveLogSink()
+//
+// Adds or removes a `absl::LogSink` as a consumer of logging data.
+//
+// These functions are thread-safe.
+//
+// It is an error to attempt to add a sink that's already registered or to
+// attempt to remove one that isn't.
+//
+// To avoid unbounded recursion, dispatch to registered `absl::LogSink`s is
+// disabled per-thread while running the `Send()` method of registered
+// `absl::LogSink`s.  Affected messages are dispatched to a special internal
+// sink instead which writes them to `stderr`.
+//
+// Do not call these inside `absl::LogSink::Send`.
+inline void AddLogSink(absl::LogSink* sink) { log_internal::AddLogSink(sink); }
+inline void RemoveLogSink(absl::LogSink* sink) {
+  log_internal::RemoveLogSink(sink);
+}
+
+// FlushLogSinks()
+//
+// Calls `absl::LogSink::Flush` on all registered sinks.
+//
+// Do not call this inside `absl::LogSink::Send`.
+inline void FlushLogSinks() { log_internal::FlushLogSinks(); }
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_SINK_REGISTRY_H_
diff --git a/third_party/abseil-cpp/absl/log/log_sink_test.cc b/third_party/abseil-cpp/absl/log/log_sink_test.cc
new file mode 100644
index 0000000000..8903da7266
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_sink_test.cc
@@ -0,0 +1,419 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/log_sink.h"
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/log/internal/test_actions.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/log/log_sink_registry.h"
+#include "absl/log/scoped_mock_log.h"
+#include "absl/strings/string_view.h"
+
+namespace {
+
+using ::absl::log_internal::DeathTestExpectedLogging;
+using ::absl::log_internal::DeathTestUnexpectedLogging;
+using ::absl::log_internal::DeathTestValidateExpectations;
+using ::absl::log_internal::DiedOfFatal;
+using ::testing::_;
+using ::testing::AnyNumber;
+using ::testing::HasSubstr;
+using ::testing::InSequence;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+// Tests for global log sink registration.
+// ---------------------------------------
+
+TEST(LogSinkRegistryTest, AddLogSink) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  InSequence s;
+  EXPECT_CALL(test_sink, Log(_, _, "hello world")).Times(0);
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, __FILE__, "Test : 42"));
+  EXPECT_CALL(test_sink,
+              Log(absl::LogSeverity::kWarning, __FILE__, "Danger ahead"));
+  EXPECT_CALL(test_sink,
+              Log(absl::LogSeverity::kError, __FILE__, "This is an error"));
+
+  LOG(INFO) << "hello world";
+  test_sink.StartCapturingLogs();
+
+  LOG(INFO) << "Test : " << 42;
+  LOG(WARNING) << "Danger" << ' ' << "ahead";
+  LOG(ERROR) << "This is an error";
+
+  test_sink.StopCapturingLogs();
+  LOG(INFO) << "Goodby world";
+}
+
+TEST(LogSinkRegistryTest, MultipleLogSinks) {
+  absl::ScopedMockLog test_sink1(absl::MockLogDefault::kDisallowUnexpected);
+  absl::ScopedMockLog test_sink2(absl::MockLogDefault::kDisallowUnexpected);
+
+  ::testing::InSequence seq;
+  EXPECT_CALL(test_sink1, Log(absl::LogSeverity::kInfo, _, "First")).Times(1);
+  EXPECT_CALL(test_sink2, Log(absl::LogSeverity::kInfo, _, "First")).Times(0);
+
+  EXPECT_CALL(test_sink1, Log(absl::LogSeverity::kInfo, _, "Second")).Times(1);
+  EXPECT_CALL(test_sink2, Log(absl::LogSeverity::kInfo, _, "Second")).Times(1);
+
+  EXPECT_CALL(test_sink1, Log(absl::LogSeverity::kInfo, _, "Third")).Times(0);
+  EXPECT_CALL(test_sink2, Log(absl::LogSeverity::kInfo, _, "Third")).Times(1);
+
+  LOG(INFO) << "Before first";
+
+  test_sink1.StartCapturingLogs();
+  LOG(INFO) << "First";
+
+  test_sink2.StartCapturingLogs();
+  LOG(INFO) << "Second";
+
+  test_sink1.StopCapturingLogs();
+  LOG(INFO) << "Third";
+
+  test_sink2.StopCapturingLogs();
+  LOG(INFO) << "Fourth";
+}
+
+TEST(LogSinkRegistrationDeathTest, DuplicateSinkRegistration) {
+  ASSERT_DEATH_IF_SUPPORTED(
+      {
+        absl::ScopedMockLog sink;
+        sink.StartCapturingLogs();
+        absl::AddLogSink(&sink.UseAsLocalSink());
+      },
+      HasSubstr("Duplicate log sinks"));
+}
+
+TEST(LogSinkRegistrationDeathTest, MismatchSinkRemoval) {
+  ASSERT_DEATH_IF_SUPPORTED(
+      {
+        absl::ScopedMockLog sink;
+        absl::RemoveLogSink(&sink.UseAsLocalSink());
+      },
+      HasSubstr("Mismatched log sink"));
+}
+
+// Tests for log sink semantic.
+// ---------------------------------------
+
+TEST(LogSinkTest, FlushSinks) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Flush()).Times(2);
+
+  test_sink.StartCapturingLogs();
+
+  absl::FlushLogSinks();
+  absl::FlushLogSinks();
+}
+
+TEST(LogSinkDeathTest, DeathInSend) {
+  class FatalSendSink : public absl::LogSink {
+   public:
+    void Send(const absl::LogEntry&) override { LOG(FATAL) << "goodbye world"; }
+  };
+
+  FatalSendSink sink;
+  EXPECT_EXIT({ LOG(INFO).ToSinkAlso(&sink) << "hello world"; }, DiedOfFatal,
+              _);
+}
+
+// Tests for explicit log sink redirection.
+// ---------------------------------------
+
+TEST(LogSinkTest, ToSinkAlso) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+  absl::ScopedMockLog another_sink(absl::MockLogDefault::kDisallowUnexpected);
+  EXPECT_CALL(test_sink, Log(_, _, "hello world"));
+  EXPECT_CALL(another_sink, Log(_, _, "hello world"));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).ToSinkAlso(&another_sink.UseAsLocalSink()) << "hello world";
+}
+
+TEST(LogSinkTest, ToSinkOnly) {
+  absl::ScopedMockLog another_sink(absl::MockLogDefault::kDisallowUnexpected);
+  EXPECT_CALL(another_sink, Log(_, _, "hello world"));
+  LOG(INFO).ToSinkOnly(&another_sink.UseAsLocalSink()) << "hello world";
+}
+
+TEST(LogSinkTest, ToManySinks) {
+  absl::ScopedMockLog sink1(absl::MockLogDefault::kDisallowUnexpected);
+  absl::ScopedMockLog sink2(absl::MockLogDefault::kDisallowUnexpected);
+  absl::ScopedMockLog sink3(absl::MockLogDefault::kDisallowUnexpected);
+  absl::ScopedMockLog sink4(absl::MockLogDefault::kDisallowUnexpected);
+  absl::ScopedMockLog sink5(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(sink3, Log(_, _, "hello world"));
+  EXPECT_CALL(sink4, Log(_, _, "hello world"));
+  EXPECT_CALL(sink5, Log(_, _, "hello world"));
+
+  LOG(INFO)
+          .ToSinkAlso(&sink1.UseAsLocalSink())
+          .ToSinkAlso(&sink2.UseAsLocalSink())
+          .ToSinkOnly(&sink3.UseAsLocalSink())
+          .ToSinkAlso(&sink4.UseAsLocalSink())
+          .ToSinkAlso(&sink5.UseAsLocalSink())
+      << "hello world";
+}
+
+class ReentrancyTest : public ::testing::Test {
+ protected:
+  ReentrancyTest() = default;
+  enum class LogMode : int { kNormal, kToSinkAlso, kToSinkOnly };
+
+  class ReentrantSendLogSink : public absl::LogSink {
+   public:
+    explicit ReentrantSendLogSink(absl::LogSeverity severity,
+                                  absl::LogSink* sink, LogMode mode)
+        : severity_(severity), sink_(sink), mode_(mode) {}
+    explicit ReentrantSendLogSink(absl::LogSeverity severity)
+        : ReentrantSendLogSink(severity, nullptr, LogMode::kNormal) {}
+
+    void Send(const absl::LogEntry&) override {
+      switch (mode_) {
+        case LogMode::kNormal:
+          LOG(LEVEL(severity_)) << "The log is coming from *inside the sink*.";
+          break;
+        case LogMode::kToSinkAlso:
+          LOG(LEVEL(severity_)).ToSinkAlso(sink_)
+              << "The log is coming from *inside the sink*.";
+          break;
+        case LogMode::kToSinkOnly:
+          LOG(LEVEL(severity_)).ToSinkOnly(sink_)
+              << "The log is coming from *inside the sink*.";
+          break;
+        default:
+          ABSL_RAW_LOG(FATAL, "Invalid mode %d.\n", static_cast<int>(mode_));
+      }
+    }
+
+   private:
+    absl::LogSeverity severity_;
+    absl::LogSink* sink_;
+    LogMode mode_;
+  };
+
+  static absl::string_view LogAndReturn(absl::LogSeverity severity,
+                                        absl::string_view to_log,
+                                        absl::string_view to_return) {
+    LOG(LEVEL(severity)) << to_log;
+    return to_return;
+  }
+};
+
+TEST_F(ReentrancyTest, LogFunctionThatLogs) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  InSequence seq;
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, _, "hello"));
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, _, "world"));
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kWarning, _, "danger"));
+  EXPECT_CALL(test_sink, Log(absl::LogSeverity::kInfo, _, "here"));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO) << LogAndReturn(absl::LogSeverity::kInfo, "hello", "world");
+  LOG(INFO) << LogAndReturn(absl::LogSeverity::kWarning, "danger", "here");
+}
+
+TEST_F(ReentrancyTest, RegisteredLogSinkThatLogsInSend) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+  ReentrantSendLogSink renentrant_sink(absl::LogSeverity::kInfo);
+  EXPECT_CALL(test_sink, Log(_, _, "hello world"));
+
+  test_sink.StartCapturingLogs();
+  absl::AddLogSink(&renentrant_sink);
+  LOG(INFO) << "hello world";
+  absl::RemoveLogSink(&renentrant_sink);
+}
+
+TEST_F(ReentrancyTest, AlsoLogSinkThatLogsInSend) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+  ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kInfo);
+  EXPECT_CALL(test_sink, Log(_, _, "hello world"));
+  EXPECT_CALL(test_sink,
+              Log(_, _, "The log is coming from *inside the sink*."));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).ToSinkAlso(&reentrant_sink) << "hello world";
+}
+
+TEST_F(ReentrancyTest, RegisteredAlsoLogSinkThatLogsInSend) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+  ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kInfo);
+  EXPECT_CALL(test_sink, Log(_, _, "hello world"));
+  // We only call into the test_log sink once with this message, since the
+  // second time log statement is run we are in "ThreadIsLogging" mode and all
+  // the log statements are redirected into stderr.
+  EXPECT_CALL(test_sink,
+              Log(_, _, "The log is coming from *inside the sink*."));
+
+  test_sink.StartCapturingLogs();
+  absl::AddLogSink(&reentrant_sink);
+  LOG(INFO).ToSinkAlso(&reentrant_sink) << "hello world";
+  absl::RemoveLogSink(&reentrant_sink);
+}
+
+TEST_F(ReentrancyTest, OnlyLogSinkThatLogsInSend) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+  ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kInfo);
+  EXPECT_CALL(test_sink,
+              Log(_, _, "The log is coming from *inside the sink*."));
+
+  test_sink.StartCapturingLogs();
+  LOG(INFO).ToSinkOnly(&reentrant_sink) << "hello world";
+}
+
+TEST_F(ReentrancyTest, RegisteredOnlyLogSinkThatLogsInSend) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+  ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kInfo);
+  EXPECT_CALL(test_sink,
+              Log(_, _, "The log is coming from *inside the sink*."));
+
+  test_sink.StartCapturingLogs();
+  absl::AddLogSink(&reentrant_sink);
+  LOG(INFO).ToSinkOnly(&reentrant_sink) << "hello world";
+  absl::RemoveLogSink(&reentrant_sink);
+}
+
+using ReentrancyDeathTest = ReentrancyTest;
+
+TEST_F(ReentrancyDeathTest, LogFunctionThatLogsFatal) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+        EXPECT_CALL(test_sink, Log(_, _, "hello"))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        LOG(INFO) << LogAndReturn(absl::LogSeverity::kFatal, "hello", "world");
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+TEST_F(ReentrancyDeathTest, RegisteredLogSinkThatLogsFatalInSend) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+        ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kFatal);
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+        EXPECT_CALL(test_sink, Log(_, _, "hello world"))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        absl::AddLogSink(&reentrant_sink);
+        LOG(INFO) << "hello world";
+        // No need to call RemoveLogSink - process is dead at this point.
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+TEST_F(ReentrancyDeathTest, AlsoLogSinkThatLogsFatalInSend) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+        ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kFatal);
+
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+        EXPECT_CALL(test_sink, Log(_, _, "hello world"))
+            .WillOnce(DeathTestExpectedLogging());
+        EXPECT_CALL(test_sink,
+                    Log(_, _, "The log is coming from *inside the sink*."))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        LOG(INFO).ToSinkAlso(&reentrant_sink) << "hello world";
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+TEST_F(ReentrancyDeathTest, RegisteredAlsoLogSinkThatLogsFatalInSend) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+        ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kFatal);
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+        EXPECT_CALL(test_sink, Log(_, _, "hello world"))
+            .WillOnce(DeathTestExpectedLogging());
+        EXPECT_CALL(test_sink,
+                    Log(_, _, "The log is coming from *inside the sink*."))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        absl::AddLogSink(&reentrant_sink);
+        LOG(INFO).ToSinkAlso(&reentrant_sink) << "hello world";
+        // No need to call RemoveLogSink - process is dead at this point.
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+TEST_F(ReentrancyDeathTest, OnlyLogSinkThatLogsFatalInSend) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+        ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kFatal);
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+        EXPECT_CALL(test_sink,
+                    Log(_, _, "The log is coming from *inside the sink*."))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        LOG(INFO).ToSinkOnly(&reentrant_sink) << "hello world";
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+TEST_F(ReentrancyDeathTest, RegisteredOnlyLogSinkThatLogsFatalInSend) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+        ReentrantSendLogSink reentrant_sink(absl::LogSeverity::kFatal);
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+        EXPECT_CALL(test_sink,
+                    Log(_, _, "The log is coming from *inside the sink*."))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        absl::AddLogSink(&reentrant_sink);
+        LOG(INFO).ToSinkOnly(&reentrant_sink) << "hello world";
+        // No need to call RemoveLogSink - process is dead at this point.
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/log_streamer.h b/third_party/abseil-cpp/absl/log/log_streamer.h
new file mode 100644
index 0000000000..20327455dd
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_streamer.h
@@ -0,0 +1,171 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_streamer.h
+// -----------------------------------------------------------------------------
+//
+// This header declares the class `LogStreamer` and convenience functions to
+// construct LogStreamer objects with different associated log severity levels.
+
+#ifndef ABSL_LOG_LOG_STREAMER_H_
+#define ABSL_LOG_LOG_STREAMER_H_
+
+#include <ios>
+#include <memory>
+#include <ostream>
+#include <string>
+#include <utility>
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/log.h"
+#include "absl/strings/internal/ostringstream.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "absl/utility/utility.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// LogStreamer
+//
+// Although you can stream into `LOG(INFO)`, you can't pass it into a function
+// that takes a `std::ostream` parameter. `LogStreamer::stream()` provides a
+// `std::ostream` that buffers everything that's streamed in.  The buffer's
+// contents are logged as if by `LOG` when the `LogStreamer` is destroyed.
+// If nothing is streamed in, an empty message is logged.  If the specified
+// severity is `absl::LogSeverity::kFatal`, the program will be terminated when
+// the `LogStreamer` is destroyed regardless of whether any data were streamed
+// in.
+//
+// Factory functions corresponding to the `absl::LogSeverity` enumerators
+// are provided for convenience; if the desired severity is variable, invoke the
+// constructor directly.
+//
+// LogStreamer is movable, but not copyable.
+//
+// Examples:
+//
+//   ShaveYakAndWriteToStream(
+//       yak, absl::LogInfoStreamer(__FILE__, __LINE__).stream());
+//
+//   {
+//     // This logs a single line containing data streamed by all three function
+//     // calls.
+//     absl::LogStreamer streamer(absl::LogSeverity::kInfo, __FILE__, __LINE__);
+//     ShaveYakAndWriteToStream(yak1, streamer.stream());
+//     streamer.stream() << " ";
+//     ShaveYakAndWriteToStream(yak2, streamer.stream());
+//     streamer.stream() << " ";
+//     ShaveYakAndWriteToStreamPointer(yak3, &streamer.stream());
+//   }
+class LogStreamer final {
+ public:
+  // LogStreamer::LogStreamer()
+  //
+  // Creates a LogStreamer with a given `severity` that will log a message
+  // attributed to the given `file` and `line`.
+  explicit LogStreamer(absl::LogSeverity severity, absl::string_view file,
+                       int line)
+      : severity_(severity),
+        line_(line),
+        file_(file),
+        stream_(absl::in_place, &buf_) {
+    // To match `LOG`'s defaults:
+    stream_->setf(std::ios_base::showbase | std::ios_base::boolalpha);
+  }
+
+  // A moved-from `absl::LogStreamer` does not `LOG` when destroyed,
+  // and a program that streams into one has undefined behavior.
+  LogStreamer(LogStreamer&& that) noexcept
+      : severity_(that.severity_),
+        line_(that.line_),
+        file_(std::move(that.file_)),
+        buf_(std::move(that.buf_)),
+        stream_(std::move(that.stream_)) {
+    if (stream_.has_value()) stream_->str(&buf_);
+    that.stream_.reset();
+  }
+  LogStreamer& operator=(LogStreamer&& that) {
+    LOG_IF(LEVEL(severity_), stream_).AtLocation(file_, line_) << buf_;
+    severity_ = that.severity_;
+    file_ = std::move(that.file_);
+    line_ = that.line_;
+    buf_ = std::move(that.buf_);
+    stream_ = std::move(that.stream_);
+    if (stream_.has_value()) stream_->str(&buf_);
+    that.stream_.reset();
+    return *this;
+  }
+
+  // LogStreamer::~LogStreamer()
+  //
+  // Logs this LogStreamer's buffered content as if by LOG.
+  ~LogStreamer() {
+    LOG_IF(LEVEL(severity_), stream_.has_value()).AtLocation(file_, line_)
+        << buf_;
+  }
+
+  // LogStreamer::stream()
+  //
+  // Returns the `std::ostream` to use to write into this LogStreamer' internal
+  // buffer.
+  std::ostream& stream() { return *stream_; }
+
+ private:
+  absl::LogSeverity severity_;
+  int line_;
+  std::string file_;
+  std::string buf_;
+  // A disengaged `stream_` indicates a moved-from `LogStreamer` that should not
+  // `LOG` upon destruction.
+  absl::optional<absl::strings_internal::OStringStream> stream_;
+};
+
+// LogInfoStreamer()
+//
+// Returns a LogStreamer that writes at level LogSeverity::kInfo.
+inline LogStreamer LogInfoStreamer(absl::string_view file, int line) {
+  return absl::LogStreamer(absl::LogSeverity::kInfo, file, line);
+}
+
+// LogWarningStreamer()
+//
+// Returns a LogStreamer that writes at level LogSeverity::kWarning.
+inline LogStreamer LogWarningStreamer(absl::string_view file, int line) {
+  return absl::LogStreamer(absl::LogSeverity::kWarning, file, line);
+}
+
+// LogErrorStreamer()
+//
+// Returns a LogStreamer that writes at level LogSeverity::kError.
+inline LogStreamer LogErrorStreamer(absl::string_view file, int line) {
+  return absl::LogStreamer(absl::LogSeverity::kError, file, line);
+}
+
+// LogFatalStreamer()
+//
+// Returns a LogStreamer that writes at level LogSeverity::kFatal.
+//
+// The program will be terminated when this `LogStreamer` is destroyed,
+// regardless of whether any data were streamed in.
+inline LogStreamer LogFatalStreamer(absl::string_view file, int line) {
+  return absl::LogStreamer(absl::LogSeverity::kFatal, file, line);
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_STREAMER_H_
diff --git a/third_party/abseil-cpp/absl/log/log_streamer_test.cc b/third_party/abseil-cpp/absl/log/log_streamer_test.cc
new file mode 100644
index 0000000000..328d70d085
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/log_streamer_test.cc
@@ -0,0 +1,365 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/log_streamer.h"
+
+#include <ios>
+#include <iostream>
+#include <utility>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/internal/sysinfo.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/test_actions.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/log/scoped_mock_log.h"
+#include "absl/strings/string_view.h"
+
+namespace {
+using ::absl::log_internal::DeathTestExpectedLogging;
+using ::absl::log_internal::DeathTestUnexpectedLogging;
+using ::absl::log_internal::DeathTestValidateExpectations;
+#if GTEST_HAS_DEATH_TEST
+using ::absl::log_internal::DiedOfFatal;
+#endif
+using ::absl::log_internal::LogSeverity;
+using ::absl::log_internal::Prefix;
+using ::absl::log_internal::SourceFilename;
+using ::absl::log_internal::SourceLine;
+using ::absl::log_internal::Stacktrace;
+using ::absl::log_internal::TextMessage;
+using ::absl::log_internal::ThreadID;
+using ::absl::log_internal::TimestampInMatchWindow;
+using ::testing::AnyNumber;
+using ::testing::Eq;
+using ::testing::HasSubstr;
+using ::testing::IsEmpty;
+using ::testing::IsTrue;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+void WriteToStream(absl::string_view data, std::ostream* os) {
+  *os << "WriteToStream: " << data;
+}
+void WriteToStreamRef(absl::string_view data, std::ostream& os) {
+  os << "WriteToStreamRef: " << data;
+}
+
+TEST(LogStreamerTest, LogInfoStreamer) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 Prefix(IsTrue()), LogSeverity(Eq(absl::LogSeverity::kInfo)),
+                 TimestampInMatchWindow(),
+                 ThreadID(Eq(absl::base_internal::GetTID())),
+                 TextMessage(Eq("WriteToStream: foo")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "WriteToStream: foo"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  WriteToStream("foo", &absl::LogInfoStreamer("path/file.cc", 1234).stream());
+}
+
+TEST(LogStreamerTest, LogWarningStreamer) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 Prefix(IsTrue()), LogSeverity(Eq(absl::LogSeverity::kWarning)),
+                 TimestampInMatchWindow(),
+                 ThreadID(Eq(absl::base_internal::GetTID())),
+                 TextMessage(Eq("WriteToStream: foo")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "WriteToStream: foo"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  WriteToStream("foo",
+                &absl::LogWarningStreamer("path/file.cc", 1234).stream());
+}
+
+TEST(LogStreamerTest, LogErrorStreamer) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 Prefix(IsTrue()), LogSeverity(Eq(absl::LogSeverity::kError)),
+                 TimestampInMatchWindow(),
+                 ThreadID(Eq(absl::base_internal::GetTID())),
+                 TextMessage(Eq("WriteToStream: foo")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "WriteToStream: foo"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  WriteToStream("foo", &absl::LogErrorStreamer("path/file.cc", 1234).stream());
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST(LogStreamerDeathTest, LogFatalStreamer) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+
+        EXPECT_CALL(test_sink, Send)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        EXPECT_CALL(
+            test_sink,
+            Send(AllOf(
+                SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                Prefix(IsTrue()), LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                TimestampInMatchWindow(),
+                ThreadID(Eq(absl::base_internal::GetTID())),
+                TextMessage(Eq("WriteToStream: foo")),
+                ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                   str: "WriteToStream: foo"
+                                                 })pb")))))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        WriteToStream("foo",
+                      &absl::LogFatalStreamer("path/file.cc", 1234).stream());
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+#endif
+
+TEST(LogStreamerTest, LogStreamer) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 Prefix(IsTrue()), LogSeverity(Eq(absl::LogSeverity::kError)),
+                 TimestampInMatchWindow(),
+                 ThreadID(Eq(absl::base_internal::GetTID())),
+                 TextMessage(Eq("WriteToStream: foo")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "WriteToStream: foo"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  WriteToStream(
+      "foo", &absl::LogStreamer(absl::LogSeverity::kError, "path/file.cc", 1234)
+                  .stream());
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST(LogStreamerDeathTest, LogStreamer) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+
+        EXPECT_CALL(test_sink, Send)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        EXPECT_CALL(
+            test_sink,
+            Send(AllOf(
+                SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                Prefix(IsTrue()), LogSeverity(Eq(absl::LogSeverity::kFatal)),
+                TimestampInMatchWindow(),
+                ThreadID(Eq(absl::base_internal::GetTID())),
+                TextMessage(Eq("WriteToStream: foo")),
+                ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                   str: "WriteToStream: foo"
+                                                 })pb")))))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        WriteToStream("foo", &absl::LogStreamer(absl::LogSeverity::kFatal,
+                                                "path/file.cc", 1234)
+                                  .stream());
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+#endif
+
+TEST(LogStreamerTest, PassedByReference) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 TextMessage(Eq("WriteToStreamRef: foo")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "WriteToStreamRef: foo"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  WriteToStreamRef("foo", absl::LogInfoStreamer("path/file.cc", 1234).stream());
+}
+
+TEST(LogStreamerTest, StoredAsLocal) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  auto streamer = absl::LogInfoStreamer("path/file.cc", 1234);
+  WriteToStream("foo", &streamer.stream());
+  streamer.stream() << " ";
+  WriteToStreamRef("bar", streamer.stream());
+
+  // The call should happen when `streamer` goes out of scope; if it
+  // happened before this `EXPECT_CALL` the call would be unexpected and the
+  // test would fail.
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 TextMessage(Eq("WriteToStream: foo WriteToStreamRef: bar")),
+                 ENCODED_MESSAGE(EqualsProto(
+                     R"pb(value {
+                            str: "WriteToStream: foo WriteToStreamRef: bar"
+                          })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST(LogStreamerDeathTest, StoredAsLocal) {
+  EXPECT_EXIT(
+      {
+        // This is fatal when it goes out of scope, but not until then:
+        auto streamer = absl::LogFatalStreamer("path/file.cc", 1234);
+        std::cerr << "I'm still alive" << std::endl;
+        WriteToStream("foo", &streamer.stream());
+      },
+      DiedOfFatal, HasSubstr("I'm still alive"));
+}
+#endif
+
+TEST(LogStreamerTest, LogsEmptyLine) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(test_sink, Send(AllOf(SourceFilename(Eq("path/file.cc")),
+                                    SourceLine(Eq(1234)), TextMessage(Eq("")),
+                                    ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                                       str: ""
+                                                                     })pb")),
+                                    Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  absl::LogInfoStreamer("path/file.cc", 1234);
+}
+
+#if GTEST_HAS_DEATH_TEST
+TEST(LogStreamerDeathTest, LogsEmptyLine) {
+  EXPECT_EXIT(
+      {
+        absl::ScopedMockLog test_sink;
+
+        EXPECT_CALL(test_sink, Log)
+            .Times(AnyNumber())
+            .WillRepeatedly(DeathTestUnexpectedLogging());
+
+        EXPECT_CALL(
+            test_sink,
+            Send(AllOf(
+                SourceFilename(Eq("path/file.cc")), TextMessage(Eq("")),
+                ENCODED_MESSAGE(EqualsProto(R"pb(value { str: "" })pb")))))
+            .WillOnce(DeathTestExpectedLogging());
+
+        test_sink.StartCapturingLogs();
+        // This is fatal even though it's never used:
+        auto streamer = absl::LogFatalStreamer("path/file.cc", 1234);
+      },
+      DiedOfFatal, DeathTestValidateExpectations());
+}
+#endif
+
+TEST(LogStreamerTest, MoveConstruction) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 LogSeverity(Eq(absl::LogSeverity::kInfo)),
+                 TextMessage(Eq("hello 0x10 world 0x10")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "hello 0x10 world 0x10"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  auto streamer1 = absl::LogInfoStreamer("path/file.cc", 1234);
+  streamer1.stream() << "hello " << std::hex << 16;
+  absl::LogStreamer streamer2(std::move(streamer1));
+  streamer2.stream() << " world " << 16;
+}
+
+TEST(LogStreamerTest, MoveAssignment) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  testing::InSequence seq;
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file2.cc")), SourceLine(Eq(5678)),
+                 LogSeverity(Eq(absl::LogSeverity::kWarning)),
+                 TextMessage(Eq("something else")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "something else"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+  EXPECT_CALL(
+      test_sink,
+      Send(AllOf(SourceFilename(Eq("path/file.cc")), SourceLine(Eq(1234)),
+                 LogSeverity(Eq(absl::LogSeverity::kInfo)),
+                 TextMessage(Eq("hello 0x10 world 0x10")),
+                 ENCODED_MESSAGE(EqualsProto(R"pb(value {
+                                                    str: "hello 0x10 world 0x10"
+                                                  })pb")),
+                 Stacktrace(IsEmpty()))));
+
+  test_sink.StartCapturingLogs();
+  auto streamer1 = absl::LogInfoStreamer("path/file.cc", 1234);
+  streamer1.stream() << "hello " << std::hex << 16;
+  auto streamer2 = absl::LogWarningStreamer("path/file2.cc", 5678);
+  streamer2.stream() << "something else";
+  streamer2 = std::move(streamer1);
+  streamer2.stream() << " world " << 16;
+}
+
+TEST(LogStreamerTest, CorrectDefaultFlags) {
+  absl::ScopedMockLog test_sink(absl::MockLogDefault::kDisallowUnexpected);
+
+  // The `boolalpha` and `showbase` flags should be set by default, to match
+  // `LOG`.
+  EXPECT_CALL(test_sink, Send(AllOf(TextMessage(Eq("false0xdeadbeef")))))
+      .Times(2);
+
+  test_sink.StartCapturingLogs();
+  absl::LogInfoStreamer("path/file.cc", 1234).stream()
+      << false << std::hex << 0xdeadbeef;
+  LOG(INFO) << false << std::hex << 0xdeadbeef;
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/scoped_mock_log.cc b/third_party/abseil-cpp/absl/log/scoped_mock_log.cc
new file mode 100644
index 0000000000..4ebc0a9f98
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/scoped_mock_log.cc
@@ -0,0 +1,86 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/scoped_mock_log.h"
+
+#include <atomic>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/log/log_sink_registry.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+ScopedMockLog::ScopedMockLog(MockLogDefault default_exp)
+    : sink_(this), is_capturing_logs_(false) {
+  if (default_exp == MockLogDefault::kIgnoreUnexpected) {
+    // Ignore all calls to Log we did not set expectations for.
+    EXPECT_CALL(*this, Log).Times(::testing::AnyNumber());
+  } else {
+    // Disallow all calls to Log we did not set expectations for.
+    EXPECT_CALL(*this, Log).Times(0);
+  }
+  // By default Send mock forwards to Log mock.
+  EXPECT_CALL(*this, Send)
+      .Times(::testing::AnyNumber())
+      .WillRepeatedly([this](const absl::LogEntry& entry) {
+        is_triggered_.store(true, std::memory_order_relaxed);
+        Log(entry.log_severity(), std::string(entry.source_filename()),
+            std::string(entry.text_message()));
+      });
+
+  // By default We ignore all Flush calls.
+  EXPECT_CALL(*this, Flush).Times(::testing::AnyNumber());
+}
+
+ScopedMockLog::~ScopedMockLog() {
+  ABSL_RAW_CHECK(is_triggered_.load(std::memory_order_relaxed),
+                 "Did you forget to call StartCapturingLogs()?");
+
+  if (is_capturing_logs_) StopCapturingLogs();
+}
+
+void ScopedMockLog::StartCapturingLogs() {
+  ABSL_RAW_CHECK(!is_capturing_logs_,
+                 "StartCapturingLogs() can be called only when the "
+                 "absl::ScopedMockLog object is not capturing logs.");
+
+  is_capturing_logs_ = true;
+  is_triggered_.store(true, std::memory_order_relaxed);
+  absl::AddLogSink(&sink_);
+}
+
+void ScopedMockLog::StopCapturingLogs() {
+  ABSL_RAW_CHECK(is_capturing_logs_,
+                 "StopCapturingLogs() can be called only when the "
+                 "absl::ScopedMockLog object is capturing logs.");
+
+  is_capturing_logs_ = false;
+  absl::RemoveLogSink(&sink_);
+}
+
+absl::LogSink& ScopedMockLog::UseAsLocalSink() {
+  is_triggered_.store(true, std::memory_order_relaxed);
+  return sink_;
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/log/scoped_mock_log.h b/third_party/abseil-cpp/absl/log/scoped_mock_log.h
new file mode 100644
index 0000000000..44470c1677
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/scoped_mock_log.h
@@ -0,0 +1,194 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/scoped_mock_log.h
+// -----------------------------------------------------------------------------
+//
+// This header declares `class absl::ScopedMockLog`, for use in testing.
+
+#ifndef ABSL_LOG_SCOPED_MOCK_LOG_H_
+#define ABSL_LOG_SCOPED_MOCK_LOG_H_
+
+#include <atomic>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// MockLogDefault
+//
+// Controls how ScopedMockLog responds to unexpected calls by default.
+enum class MockLogDefault { kIgnoreUnexpected, kDisallowUnexpected };
+
+// ScopedMockLog
+//
+// ScopedMockLog is a LogSink that intercepts LOG() messages issued during its
+// lifespan.
+//
+// Using this together with GoogleTest, it's easy to test how a piece of code
+// calls LOG(). The typical usage, noting the distinction between
+// "uninteresting" and "unexpected", looks like this:
+//
+//   using ::testing::_;
+//   using ::testing::AnyNumber;
+//   using ::testing::EndsWith;
+//   using ::testing::kDoNotCaptureLogsYet;
+//   using ::testing::Lt;
+//
+//   TEST(FooTest, LogsCorrectly) {
+//     // Simple robust setup, ignores unexpected logs.
+//     absl::ScopedMockLog log;
+//
+//     // We expect the WARNING "Something bad!" exactly twice.
+//     EXPECT_CALL(log, Log(absl::LogSeverity::kWarning, _, "Something bad!"))
+//         .Times(2);
+//
+//     // But we want no messages from foo.cc.
+//     EXPECT_CALL(log, Log(_, EndsWith("/foo.cc"), _)).Times(0);
+//
+//     log.StartCapturingLogs();  // Call this after done setting expectations.
+//     Foo();  // Exercises the code under test.
+//   }
+//
+//   TEST(BarTest, LogsExactlyCorrectly) {
+//     // Strict checking, fails for unexpected logs.
+//     absl::ScopedMockLog log(absl::MockLogDefault::kDisallowUnexpected);
+//
+//     // ... but ignore low severity messages
+//     EXPECT_CALL(log, Log(Lt(absl::LogSeverity::kWarning), _, _))
+//         .Times(AnyNumber());
+//
+//     // We expect the ERROR "Something bad!" exactly once.
+//     EXPECT_CALL(log, Log(absl::LogSeverity::kError, EndsWith("/foo.cc"),
+//                 "Something bad!"))
+//         .Times(1);
+//
+//     log.StartCapturingLogs();  // Call this after done setting expectations.
+//     Bar();  // Exercises the code under test.
+//    }
+//
+// Note that in a multi-threaded environment, all LOG() messages from a single
+// thread will be handled in sequence, but that cannot be guaranteed for
+// messages from different threads. In fact, if the same or multiple
+// expectations are matched on two threads concurrently, their actions will be
+// executed concurrently as well and may interleave.
+class ScopedMockLog final {
+ public:
+  // ScopedMockLog::ScopedMockLog()
+  //
+  // Sets up the log and adds default expectations.
+  explicit ScopedMockLog(
+      MockLogDefault default_exp = MockLogDefault::kIgnoreUnexpected);
+  ScopedMockLog(const ScopedMockLog&) = delete;
+  ScopedMockLog& operator=(const ScopedMockLog&) = delete;
+
+  // ScopedMockLog::~ScopedMockLog()
+  //
+  // Stops intercepting logs and destroys this ScopedMockLog.
+  ~ScopedMockLog();
+
+  // ScopedMockLog::StartCapturingLogs()
+  //
+  // Starts log capturing if the object isn't already doing so. Otherwise
+  // crashes.
+  //
+  // Usually this method is called in the same thread that created this
+  // ScopedMockLog. It is the user's responsibility to not call this method if
+  // another thread may be calling it or StopCapturingLogs() at the same time.
+  // It is undefined behavior to add expectations while capturing logs is
+  // enabled.
+  void StartCapturingLogs();
+
+  // ScopedMockLog::StopCapturingLogs()
+  //
+  // Stops log capturing if the object is capturing logs. Otherwise crashes.
+  //
+  // Usually this method is called in the same thread that created this object.
+  // It is the user's responsibility to not call this method if another thread
+  // may be calling it or StartCapturingLogs() at the same time.
+  //
+  // It is UB to add expectations, while capturing logs is enabled.
+  void StopCapturingLogs();
+
+  // ScopedMockLog::UseAsLocalSink()
+  //
+  // Each `ScopedMockLog` is implemented with an `absl::LogSink`; this method
+  // returns a reference to that sink (e.g. for use with
+  // `LOG(...).ToSinkOnly()`) and marks the `ScopedMockLog` as having been used
+  // even if `StartCapturingLogs` is never called.
+  absl::LogSink& UseAsLocalSink();
+
+  // Implements the mock method:
+  //
+  //   void Log(LogSeverity severity, absl::string_view file_path,
+  //            absl::string_view message);
+  //
+  // The second argument to Log() is the full path of the source file in
+  // which the LOG() was issued.
+  //
+  // This is a shorthand form, which should be used by most users. Use the
+  // `Send` mock only if you want to add expectations for other log message
+  // attributes.
+  MOCK_METHOD(void, Log,
+              (absl::LogSeverity severity, const std::string& file_path,
+               const std::string& message));
+
+  // Implements the mock method:
+  //
+  //   void Send(const absl::LogEntry& entry);
+  //
+  // This is the most generic form of mock that can be specified. Use this mock
+  // only if you want to add expectations for log message attributes different
+  // from the log message text, log message path and log message severity.
+  //
+  // If no expectations are specified for this mock, the default action is to
+  // forward the call to the `Log` mock.
+  MOCK_METHOD(void, Send, (const absl::LogEntry&));
+
+  // Implements the mock method:
+  //
+  //   void Flush();
+  //
+  // Use this mock only if you want to add expectations for log flush calls.
+  MOCK_METHOD(void, Flush, ());
+
+ private:
+  class ForwardingSink final : public absl::LogSink {
+   public:
+    explicit ForwardingSink(ScopedMockLog* sml) : sml_(sml) {}
+    ForwardingSink(const ForwardingSink&) = delete;
+    ForwardingSink& operator=(const ForwardingSink&) = delete;
+    void Send(const absl::LogEntry& entry) override { sml_->Send(entry); }
+    void Flush() override { sml_->Flush(); }
+
+   private:
+    ScopedMockLog* sml_;
+  };
+
+  ForwardingSink sink_;
+  bool is_capturing_logs_;
+  std::atomic<bool> is_triggered_;
+};
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_SCOPED_MOCK_LOG_H_
diff --git a/third_party/abseil-cpp/absl/log/scoped_mock_log_test.cc b/third_party/abseil-cpp/absl/log/scoped_mock_log_test.cc
new file mode 100644
index 0000000000..44b8d7379e
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/scoped_mock_log_test.cc
@@ -0,0 +1,290 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/scoped_mock_log.h"
+
+#include <memory>
+#include <thread>  // NOLINT(build/c++11)
+
+#include "gmock/gmock.h"
+#include "gtest/gtest-spi.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/internal/test_matchers.h"
+#include "absl/log/log.h"
+#include "absl/memory/memory.h"
+#include "absl/strings/match.h"
+#include "absl/strings/string_view.h"
+#include "absl/synchronization/barrier.h"
+#include "absl/synchronization/notification.h"
+
+namespace {
+
+using ::testing::_;
+using ::testing::AnyNumber;
+using ::testing::Eq;
+using ::testing::HasSubstr;
+using ::testing::InSequence;
+using ::testing::Lt;
+using ::testing::Truly;
+using absl::log_internal::SourceBasename;
+using absl::log_internal::SourceFilename;
+using absl::log_internal::SourceLine;
+using absl::log_internal::TextMessageWithPrefix;
+using absl::log_internal::ThreadID;
+
+auto* test_env ABSL_ATTRIBUTE_UNUSED = ::testing::AddGlobalTestEnvironment(
+    new absl::log_internal::LogTestEnvironment);
+
+#if GTEST_HAS_DEATH_TEST
+TEST(ScopedMockLogDeathTest,
+     StartCapturingLogsCannotBeCalledWhenAlreadyCapturing) {
+  EXPECT_DEATH(
+      {
+        absl::ScopedMockLog log;
+        log.StartCapturingLogs();
+        log.StartCapturingLogs();
+      },
+      "StartCapturingLogs");
+}
+
+TEST(ScopedMockLogDeathTest, StopCapturingLogsCannotBeCalledWhenNotCapturing) {
+  EXPECT_DEATH(
+      {
+        absl::ScopedMockLog log;
+        log.StopCapturingLogs();
+      },
+      "StopCapturingLogs");
+}
+#endif
+
+// Tests that ScopedMockLog intercepts LOG()s when it's alive.
+TEST(ScopedMockLogTest, LogMockCatchAndMatchStrictExpectations) {
+  absl::ScopedMockLog log;
+
+  // The following expectations must match in the order they appear.
+  InSequence s;
+  EXPECT_CALL(log,
+              Log(absl::LogSeverity::kWarning, HasSubstr(__FILE__), "Danger."));
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, _, "Working...")).Times(2);
+  EXPECT_CALL(log, Log(absl::LogSeverity::kError, _, "Bad!!"));
+
+  log.StartCapturingLogs();
+  LOG(WARNING) << "Danger.";
+  LOG(INFO) << "Working...";
+  LOG(INFO) << "Working...";
+  LOG(ERROR) << "Bad!!";
+}
+
+TEST(ScopedMockLogTest, LogMockCatchAndMatchSendExpectations) {
+  absl::ScopedMockLog log;
+
+  EXPECT_CALL(
+      log,
+      Send(AllOf(SourceFilename(Eq("/my/very/very/very_long_source_file.cc")),
+                 SourceBasename(Eq("very_long_source_file.cc")),
+                 SourceLine(Eq(777)), ThreadID(Eq(absl::LogEntry::tid_t{1234})),
+                 TextMessageWithPrefix(Truly([](absl::string_view msg) {
+                   return absl::EndsWith(
+                       msg, " very_long_source_file.cc:777] Info message");
+                 })))));
+
+  log.StartCapturingLogs();
+  LOG(INFO)
+          .AtLocation("/my/very/very/very_long_source_file.cc", 777)
+          .WithThreadID(1234)
+      << "Info message";
+}
+
+TEST(ScopedMockLogTest, ScopedMockLogCanBeNice) {
+  absl::ScopedMockLog log;
+
+  InSequence s;
+  EXPECT_CALL(log,
+              Log(absl::LogSeverity::kWarning, HasSubstr(__FILE__), "Danger."));
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, _, "Working...")).Times(2);
+  EXPECT_CALL(log, Log(absl::LogSeverity::kError, _, "Bad!!"));
+
+  log.StartCapturingLogs();
+
+  // Any number of these are OK.
+  LOG(INFO) << "Info message.";
+  // Any number of these are OK.
+  LOG(WARNING).AtLocation("SomeOtherFile.cc", 100) << "Danger ";
+
+  LOG(WARNING) << "Danger.";
+
+  // Any number of these are OK.
+  LOG(INFO) << "Info message.";
+  // Any number of these are OK.
+  LOG(WARNING).AtLocation("SomeOtherFile.cc", 100) << "Danger ";
+
+  LOG(INFO) << "Working...";
+
+  // Any number of these are OK.
+  LOG(INFO) << "Info message.";
+  // Any number of these are OK.
+  LOG(WARNING).AtLocation("SomeOtherFile.cc", 100) << "Danger ";
+
+  LOG(INFO) << "Working...";
+
+  // Any number of these are OK.
+  LOG(INFO) << "Info message.";
+  // Any number of these are OK.
+  LOG(WARNING).AtLocation("SomeOtherFile.cc", 100) << "Danger ";
+
+  LOG(ERROR) << "Bad!!";
+
+  // Any number of these are OK.
+  LOG(INFO) << "Info message.";
+  // Any number of these are OK.
+  LOG(WARNING).AtLocation("SomeOtherFile.cc", 100) << "Danger ";
+}
+
+// Tests that ScopedMockLog generates a test failure if a message is logged
+// that is not expected (here, that means ERROR or FATAL).
+TEST(ScopedMockLogTest, RejectsUnexpectedLogs) {
+  EXPECT_NONFATAL_FAILURE(
+      {
+        absl::ScopedMockLog log(absl::MockLogDefault::kDisallowUnexpected);
+        // Any INFO and WARNING messages are permitted.
+        EXPECT_CALL(log, Log(Lt(absl::LogSeverity::kError), _, _))
+            .Times(AnyNumber());
+        log.StartCapturingLogs();
+        LOG(INFO) << "Ignored";
+        LOG(WARNING) << "Ignored";
+        LOG(ERROR) << "Should not be ignored";
+      },
+      "Should not be ignored");
+}
+
+TEST(ScopedMockLogTest, CapturesLogsAfterStartCapturingLogs) {
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfinity);
+  absl::ScopedMockLog log;
+
+  // The ScopedMockLog object shouldn't see these LOGs, as it hasn't
+  // started capturing LOGs yet.
+  LOG(INFO) << "Ignored info";
+  LOG(WARNING) << "Ignored warning";
+  LOG(ERROR) << "Ignored error";
+
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, _, "Expected info"));
+  log.StartCapturingLogs();
+
+  // Only this LOG will be seen by the ScopedMockLog.
+  LOG(INFO) << "Expected info";
+}
+
+TEST(ScopedMockLogTest, DoesNotCaptureLogsAfterStopCapturingLogs) {
+  absl::ScopedMockLog log;
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, _, "Expected info"));
+
+  log.StartCapturingLogs();
+
+  // This LOG should be seen by the ScopedMockLog.
+  LOG(INFO) << "Expected info";
+
+  log.StopCapturingLogs();
+
+  // The ScopedMockLog object shouldn't see these LOGs, as it has
+  // stopped capturing LOGs.
+  LOG(INFO) << "Ignored info";
+  LOG(WARNING) << "Ignored warning";
+  LOG(ERROR) << "Ignored error";
+}
+
+// Tests that all messages are intercepted regardless of issuing thread. The
+// purpose of this test is NOT to exercise thread-safety.
+TEST(ScopedMockLogTest, LogFromMultipleThreads) {
+  absl::ScopedMockLog log;
+
+  // We don't establish an order to expectations here, since the threads may
+  // execute their log statements in different order.
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, __FILE__, "Thread 1"));
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, __FILE__, "Thread 2"));
+
+  log.StartCapturingLogs();
+
+  absl::Barrier barrier(2);
+  std::thread thread1([&barrier]() {
+    barrier.Block();
+    LOG(INFO) << "Thread 1";
+  });
+  std::thread thread2([&barrier]() {
+    barrier.Block();
+    LOG(INFO) << "Thread 2";
+  });
+
+  thread1.join();
+  thread2.join();
+}
+
+// Tests that no sequence will be imposed on two LOG message expectations from
+// different threads. This test would actually deadlock if replaced to two LOG
+// statements from the same thread.
+TEST(ScopedMockLogTest, NoSequenceWithMultipleThreads) {
+  absl::ScopedMockLog log;
+
+  absl::Barrier barrier(2);
+  EXPECT_CALL(log, Log(absl::LogSeverity::kInfo, _, _))
+      .Times(2)
+      .WillRepeatedly([&barrier]() { barrier.Block(); });
+
+  log.StartCapturingLogs();
+
+  std::thread thread1([]() { LOG(INFO) << "Thread 1"; });
+  std::thread thread2([]() { LOG(INFO) << "Thread 2"; });
+
+  thread1.join();
+  thread2.join();
+}
+
+TEST(ScopedMockLogTsanTest,
+     ScopedMockLogCanBeDeletedWhenAnotherThreadIsLogging) {
+  auto log = absl::make_unique<absl::ScopedMockLog>();
+  EXPECT_CALL(*log, Log(absl::LogSeverity::kInfo, __FILE__, "Thread log"))
+      .Times(AnyNumber());
+
+  log->StartCapturingLogs();
+
+  absl::Notification logging_started;
+
+  std::thread thread([&logging_started]() {
+    for (int i = 0; i < 100; ++i) {
+      if (i == 50) logging_started.Notify();
+      LOG(INFO) << "Thread log";
+    }
+  });
+
+  logging_started.WaitForNotification();
+  log.reset();
+  thread.join();
+}
+
+TEST(ScopedMockLogTest, AsLocalSink) {
+  absl::ScopedMockLog log(absl::MockLogDefault::kDisallowUnexpected);
+
+  EXPECT_CALL(log, Log(_, _, "two"));
+  EXPECT_CALL(log, Log(_, _, "three"));
+
+  LOG(INFO) << "one";
+  LOG(INFO).ToSinkOnly(&log.UseAsLocalSink()) << "two";
+  LOG(INFO).ToSinkAlso(&log.UseAsLocalSink()) << "three";
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/log/stripping_test.cc b/third_party/abseil-cpp/absl/log/stripping_test.cc
new file mode 100644
index 0000000000..83dfc2dcb7
--- /dev/null
+++ b/third_party/abseil-cpp/absl/log/stripping_test.cc
@@ -0,0 +1,340 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Tests for stripping of literal strings.
+// ---------------------------------------
+//
+// When a `LOG` statement can be trivially proved at compile time to never fire,
+// e.g. due to `ABSL_MIN_LOG_LEVEL`, `NDEBUG`, or some explicit condition, data
+// streamed in can be dropped from the compiled program completely if they are
+// not used elsewhere.  This most commonly affects string literals, which users
+// often want to strip to reduce binary size and/or redact information about
+// their program's internals (e.g. in a release build).
+//
+// These tests log strings and then validate whether they appear in the compiled
+// binary.  This is done by opening the file corresponding to the running test
+// and running a simple string search on its contents.  The strings to be logged
+// and searched for must be unique, and we must take care not to emit them into
+// the binary in any other place, e.g. when searching for them.  The latter is
+// accomplished by computing them using base64; the source string appears in the
+// binary but the target string is computed at runtime.
+
+#include <stdio.h>
+
+#if defined(__MACH__)
+#include <mach-o/dyld.h>
+#elif defined(_WIN32)
+#include <Windows.h>
+#include <tchar.h>
+#endif
+
+#include <algorithm>
+#include <functional>
+#include <memory>
+#include <ostream>
+#include <string>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/internal/strerror.h"
+#include "absl/flags/internal/program_name.h"
+#include "absl/log/check.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/log/log.h"
+#include "absl/strings/escaping.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
+
+namespace {
+using ::testing::_;
+using ::testing::Eq;
+using ::testing::NotNull;
+
+using absl::log_internal::kAbslMinLogLevel;
+
+std::string Base64UnescapeOrDie(absl::string_view data) {
+  std::string decoded;
+  CHECK(absl::Base64Unescape(data, &decoded));
+  return decoded;
+}
+
+// -----------------------------------------------------------------------------
+// A Googletest matcher which searches the running binary for a given string
+// -----------------------------------------------------------------------------
+
+// This matcher is used to validate that literal strings streamed into
+// `LOG` statements that ought to be compiled out (e.g. `LOG_IF(INFO, false)`)
+// do not appear in the binary.
+//
+// Note that passing the string to be sought directly to `FileHasSubstr()` all
+// but forces its inclusion in the binary regardless of the logging library's
+// behavior. For example:
+//
+//   LOG_IF(INFO, false) << "you're the man now dog";
+//   // This will always pass:
+//   // EXPECT_THAT(fp, FileHasSubstr("you're the man now dog"));
+//   // So use this instead:
+//   EXPECT_THAT(fp, FileHasSubstr(
+//       Base64UnescapeOrDie("eW91J3JlIHRoZSBtYW4gbm93IGRvZw==")));
+
+class FileHasSubstrMatcher final : public ::testing::MatcherInterface<FILE*> {
+ public:
+  explicit FileHasSubstrMatcher(absl::string_view needle) : needle_(needle) {}
+
+  bool MatchAndExplain(
+      FILE* fp, ::testing::MatchResultListener* listener) const override {
+    std::string buf(
+        std::max<std::string::size_type>(needle_.size() * 2, 163840000), '\0');
+    size_t buf_start_offset = 0;  // The file offset of the byte at `buf[0]`.
+    size_t buf_data_size = 0;     // The number of bytes of `buf` which contain
+                                  // data.
+
+    ::fseek(fp, 0, SEEK_SET);
+    while (true) {
+      // Fill the buffer to capacity or EOF:
+      while (buf_data_size < buf.size()) {
+        const size_t ret = fread(&buf[buf_data_size], sizeof(char),
+                                 buf.size() - buf_data_size, fp);
+        if (ret == 0) break;
+        buf_data_size += ret;
+      }
+      if (ferror(fp)) {
+        *listener << "error reading file";
+        return false;
+      }
+      const absl::string_view haystack(&buf[0], buf_data_size);
+      const auto off = haystack.find(needle_);
+      if (off != haystack.npos) {
+        *listener << "string found at offset " << buf_start_offset + off;
+        return true;
+      }
+      if (feof(fp)) {
+        *listener << "string not found";
+        return false;
+      }
+      // Copy the end of `buf` to the beginning so we catch matches that span
+      // buffer boundaries.  `buf` and `buf_data_size` are always large enough
+      // that these ranges don't overlap.
+      memcpy(&buf[0], &buf[buf_data_size - needle_.size()], needle_.size());
+      buf_start_offset += buf_data_size - needle_.size();
+      buf_data_size = needle_.size();
+    }
+  }
+  void DescribeTo(std::ostream* os) const override {
+    *os << "contains the string \"" << needle_ << "\" (base64(\""
+        << Base64UnescapeOrDie(needle_) << "\"))";
+  }
+
+  void DescribeNegationTo(std::ostream* os) const override {
+    *os << "does not ";
+    DescribeTo(os);
+  }
+
+ private:
+  std::string needle_;
+};
+
+class StrippingTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+#ifndef NDEBUG
+    // Non-optimized builds don't necessarily eliminate dead code at all, so we
+    // don't attempt to validate stripping against such builds.
+    GTEST_SKIP() << "StrippingTests skipped since this build is not optimized";
+#elif defined(__EMSCRIPTEN__)
+    // These tests require a way to examine the running binary and look for
+    // strings; there's no portable way to do that.
+    GTEST_SKIP()
+        << "StrippingTests skipped since this platform is not optimized";
+#endif
+  }
+
+  // Opens this program's executable file.  Returns `nullptr` and writes to
+  // `stderr` on failure.
+  std::unique_ptr<FILE, std::function<void(FILE*)>> OpenTestExecutable() {
+#if defined(__linux__)
+    std::unique_ptr<FILE, std::function<void(FILE*)>> fp(
+        fopen("/proc/self/exe", "rb"), [](FILE* fp) { fclose(fp); });
+    if (!fp) {
+      const std::string err = absl::base_internal::StrError(errno);
+      absl::FPrintF(stderr, "Failed to open /proc/self/exe: %s\n", err);
+    }
+    return fp;
+#elif defined(__Fuchsia__)
+    // TODO(b/242579714): We need to restore the test coverage on this platform.
+    std::unique_ptr<FILE, std::function<void(FILE*)>> fp(
+        fopen(absl::StrCat("/pkg/bin/",
+                           absl::flags_internal::ShortProgramInvocationName())
+                  .c_str(),
+              "rb"),
+        [](FILE* fp) { fclose(fp); });
+    if (!fp) {
+      const std::string err = absl::base_internal::StrError(errno);
+      absl::FPrintF(stderr, "Failed to open /pkg/bin/<binary name>: %s\n", err);
+    }
+    return fp;
+#elif defined(__MACH__)
+    uint32_t size = 0;
+    int ret = _NSGetExecutablePath(nullptr, &size);
+    if (ret != -1) {
+      absl::FPrintF(stderr,
+                    "Failed to get executable path: "
+                    "_NSGetExecutablePath(nullptr) returned %d\n",
+                    ret);
+      return nullptr;
+    }
+    std::string path(size, '\0');
+    ret = _NSGetExecutablePath(&path[0], &size);
+    if (ret != 0) {
+      absl::FPrintF(
+          stderr,
+          "Failed to get executable path: _NSGetExecutablePath(buffer) "
+          "returned %d\n",
+          ret);
+      return nullptr;
+    }
+    std::unique_ptr<FILE, std::function<void(FILE*)>> fp(
+        fopen(path.c_str(), "rb"), [](FILE* fp) { fclose(fp); });
+    if (!fp) {
+      const std::string err = absl::base_internal::StrError(errno);
+      absl::FPrintF(stderr, "Failed to open executable at %s: %s\n", path, err);
+    }
+    return fp;
+#elif defined(_WIN32)
+    std::basic_string<TCHAR> path(4096, _T('\0'));
+    while (true) {
+      const uint32_t ret = ::GetModuleFileName(nullptr, &path[0],
+                                               static_cast<DWORD>(path.size()));
+      if (ret == 0) {
+        absl::FPrintF(
+            stderr,
+            "Failed to get executable path: GetModuleFileName(buffer) "
+            "returned 0\n");
+        return nullptr;
+      }
+      if (ret < path.size()) break;
+      path.resize(path.size() * 2, _T('\0'));
+    }
+    std::unique_ptr<FILE, std::function<void(FILE*)>> fp(
+        _tfopen(path.c_str(), _T("rb")), [](FILE* fp) { fclose(fp); });
+    if (!fp) absl::FPrintF(stderr, "Failed to open executable\n");
+    return fp;
+#else
+    absl::FPrintF(stderr,
+                  "OpenTestExecutable() unimplemented on this platform\n");
+    return nullptr;
+#endif
+  }
+
+  ::testing::Matcher<FILE*> FileHasSubstr(absl::string_view needle) {
+    return MakeMatcher(new FileHasSubstrMatcher(needle));
+  }
+};
+
+// This tests whether out methodology for testing stripping works on this
+// platform by looking for one string that definitely ought to be there and one
+// that definitely ought not to.  If this fails, none of the `StrippingTest`s
+// are going to produce meaningful results.
+TEST_F(StrippingTest, Control) {
+  constexpr char kEncodedPositiveControl[] =
+      "U3RyaXBwaW5nVGVzdC5Qb3NpdGl2ZUNvbnRyb2w=";
+  const std::string encoded_negative_control =
+      absl::Base64Escape("StrippingTest.NegativeControl");
+
+  // Verify this mainly so we can encode other strings and know definitely they
+  // won't encode to `kEncodedPositiveControl`.
+  EXPECT_THAT(Base64UnescapeOrDie("U3RyaXBwaW5nVGVzdC5Qb3NpdGl2ZUNvbnRyb2w="),
+              Eq("StrippingTest.PositiveControl"));
+
+  auto exe = OpenTestExecutable();
+  ASSERT_THAT(exe, NotNull());
+  EXPECT_THAT(exe.get(), FileHasSubstr(kEncodedPositiveControl));
+  EXPECT_THAT(exe.get(), Not(FileHasSubstr(encoded_negative_control)));
+}
+
+TEST_F(StrippingTest, Literal) {
+  // We need to load a copy of the needle string into memory (so we can search
+  // for it) without leaving it lying around in plaintext in the executable file
+  // as would happen if we used a literal.  We might (or might not) leave it
+  // lying around later; that's what the tests are for!
+  const std::string needle = absl::Base64Escape("StrippingTest.Literal");
+  LOG(INFO) << "U3RyaXBwaW5nVGVzdC5MaXRlcmFs";
+  auto exe = OpenTestExecutable();
+  ASSERT_THAT(exe, NotNull());
+  if (absl::LogSeverity::kInfo >= kAbslMinLogLevel) {
+    EXPECT_THAT(exe.get(), FileHasSubstr(needle));
+  } else {
+    EXPECT_THAT(exe.get(), Not(FileHasSubstr(needle)));
+  }
+}
+
+TEST_F(StrippingTest, LiteralInExpression) {
+  // We need to load a copy of the needle string into memory (so we can search
+  // for it) without leaving it lying around in plaintext in the executable file
+  // as would happen if we used a literal.  We might (or might not) leave it
+  // lying around later; that's what the tests are for!
+  const std::string needle =
+      absl::Base64Escape("StrippingTest.LiteralInExpression");
+  LOG(INFO) << absl::StrCat("secret: ",
+                            "U3RyaXBwaW5nVGVzdC5MaXRlcmFsSW5FeHByZXNzaW9u");
+  std::unique_ptr<FILE, std::function<void(FILE*)>> exe = OpenTestExecutable();
+  ASSERT_THAT(exe, NotNull());
+  if (absl::LogSeverity::kInfo >= kAbslMinLogLevel) {
+    EXPECT_THAT(exe.get(), FileHasSubstr(needle));
+  } else {
+    EXPECT_THAT(exe.get(), Not(FileHasSubstr(needle)));
+  }
+}
+
+TEST_F(StrippingTest, Fatal) {
+  // We need to load a copy of the needle string into memory (so we can search
+  // for it) without leaving it lying around in plaintext in the executable file
+  // as would happen if we used a literal.  We might (or might not) leave it
+  // lying around later; that's what the tests are for!
+  const std::string needle = absl::Base64Escape("StrippingTest.Fatal");
+  EXPECT_DEATH_IF_SUPPORTED(LOG(FATAL) << "U3RyaXBwaW5nVGVzdC5GYXRhbA==", "");
+  std::unique_ptr<FILE, std::function<void(FILE*)>> exe = OpenTestExecutable();
+  ASSERT_THAT(exe, NotNull());
+  if (absl::LogSeverity::kFatal >= kAbslMinLogLevel) {
+    EXPECT_THAT(exe.get(), FileHasSubstr(needle));
+  } else {
+    EXPECT_THAT(exe.get(), Not(FileHasSubstr(needle)));
+  }
+}
+
+TEST_F(StrippingTest, Level) {
+  const std::string needle = absl::Base64Escape("StrippingTest.Level");
+  volatile auto severity = absl::LogSeverity::kWarning;
+  // Ensure that `severity` is not a compile-time constant to prove that
+  // stripping works regardless:
+  LOG(LEVEL(severity)) << "U3RyaXBwaW5nVGVzdC5MZXZlbA==";
+  std::unique_ptr<FILE, std::function<void(FILE*)>> exe = OpenTestExecutable();
+  ASSERT_THAT(exe, NotNull());
+  if (absl::LogSeverity::kFatal >= kAbslMinLogLevel) {
+    // This can't be stripped at compile-time because it might evaluate to a
+    // level that shouldn't be stripped.
+    EXPECT_THAT(exe.get(), FileHasSubstr(needle));
+  } else {
+#if defined(_MSC_VER) || defined(__APPLE__)
+    // Dead code elimination misses this case.
+#else
+    // All levels should be stripped, so it doesn't matter what the severity
+    // winds up being.
+    EXPECT_THAT(exe.get(), Not(FileHasSubstr(needle)));
+#endif
+  }
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/memory/BUILD.bazel b/third_party/abseil-cpp/absl/memory/BUILD.bazel
index c16bf8a948..389aedf32e 100644
--- a/third_party/abseil-cpp/absl/memory/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/memory/BUILD.bazel
@@ -29,6 +29,9 @@ cc_library(
     name = "memory",
     hdrs = ["memory.h"],
     copts = ABSL_DEFAULT_COPTS,
+    defines = select({
+        "//conditions:default": [],
+    }),
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:core_headers",
diff --git a/third_party/abseil-cpp/absl/memory/BUILD.gn b/third_party/abseil-cpp/absl/memory/BUILD.gn
new file mode 100644
index 0000000000..1c1f6f8909
--- /dev/null
+++ b/third_party/abseil-cpp/absl/memory/BUILD.gn
@@ -0,0 +1,21 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("memory") {
+  public = [ "memory.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_test("memory_test") {
+  sources = [ "memory_test.cc" ]
+  deps = [
+    ":memory",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/memory/memory_test.cc b/third_party/abseil-cpp/absl/memory/memory_test.cc
index 1990c7ba47..8ac856b1df 100644
--- a/third_party/abseil-cpp/absl/memory/memory_test.cc
+++ b/third_party/abseil-cpp/absl/memory/memory_test.cc
@@ -548,22 +548,23 @@ struct MinimalMockAllocator {
 TEST(AllocatorTraits, FunctionsMinimal) {
   int trace = 0;
   int hint;
-  TestValue x(&trace);
+  alignas(TestValue) char buffer[sizeof(TestValue)];
+  auto* x = reinterpret_cast<TestValue*>(buffer);
   MinimalMockAllocator mock;
   using Traits = absl::allocator_traits<MinimalMockAllocator>;
-  EXPECT_CALL(mock, allocate(7)).WillRepeatedly(Return(&x));
-  EXPECT_CALL(mock, deallocate(&x, 7));
+  EXPECT_CALL(mock, allocate(7)).WillRepeatedly(Return(x));
+  EXPECT_CALL(mock, deallocate(x, 7));
 
-  EXPECT_EQ(&x, Traits::allocate(mock, 7));
+  EXPECT_EQ(x, Traits::allocate(mock, 7));
   static_cast<void>(Traits::allocate(mock, 7, static_cast<const void*>(&hint)));
-  EXPECT_EQ(&x, Traits::allocate(mock, 7, static_cast<const void*>(&hint)));
-  Traits::deallocate(mock, &x, 7);
+  EXPECT_EQ(x, Traits::allocate(mock, 7, static_cast<const void*>(&hint)));
+  Traits::deallocate(mock, x, 7);
 
+  EXPECT_EQ(0, trace);
+  Traits::construct(mock, x, &trace);
   EXPECT_EQ(1, trace);
-  Traits::construct(mock, &x, &trace);
-  EXPECT_EQ(2, trace);
-  Traits::destroy(mock, &x);
-  EXPECT_EQ(1, trace);
+  Traits::destroy(mock, x);
+  EXPECT_EQ(0, trace);
 
   EXPECT_EQ(std::numeric_limits<size_t>::max() / sizeof(TestValue),
             Traits::max_size(mock));
@@ -599,7 +600,7 @@ TEST(AllocatorTraits, FunctionsFull) {
   EXPECT_CALL(mock, allocate(13, &hint)).WillRepeatedly(Return(&y));
   EXPECT_CALL(mock, construct(&x, &trace));
   EXPECT_CALL(mock, destroy(&x));
-  EXPECT_CALL(mock, max_size()).WillRepeatedly(Return(17));
+  EXPECT_CALL(mock, max_size()).WillRepeatedly(Return(17u));
   EXPECT_CALL(mock, select_on_container_copy_construction())
       .WillRepeatedly(Return(FullMockAllocator(23)));
 
@@ -612,7 +613,7 @@ TEST(AllocatorTraits, FunctionsFull) {
   Traits::destroy(mock, &x);
   EXPECT_EQ(1, trace);
 
-  EXPECT_EQ(17, Traits::max_size(mock));
+  EXPECT_EQ(17u, Traits::max_size(mock));
 
   EXPECT_EQ(0, mock.value);
   EXPECT_EQ(23, Traits::select_on_container_copy_construction(mock).value);
diff --git a/third_party/abseil-cpp/absl/meta/BUILD.bazel b/third_party/abseil-cpp/absl/meta/BUILD.bazel
index fb379251a6..4478ccf7d2 100644
--- a/third_party/abseil-cpp/absl/meta/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/meta/BUILD.bazel
@@ -42,6 +42,7 @@ cc_test(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":type_traits",
+        "//absl/base:core_headers",
         "@com_google_googletest//:gtest_main",
     ],
 )
diff --git a/third_party/abseil-cpp/absl/meta/BUILD.gn b/third_party/abseil-cpp/absl/meta/BUILD.gn
new file mode 100644
index 0000000000..2d671215b3
--- /dev/null
+++ b/third_party/abseil-cpp/absl/meta/BUILD.gn
@@ -0,0 +1,18 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("type_traits") {
+  public = [ "type_traits.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_test("type_traits_test") {
+  sources = [ "type_traits_test.cc" ]
+  deps = [
+    ":type_traits",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/meta/CMakeLists.txt b/third_party/abseil-cpp/absl/meta/CMakeLists.txt
index 9de4bd3751..f16f17bd64 100644
--- a/third_party/abseil-cpp/absl/meta/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/meta/CMakeLists.txt
@@ -34,6 +34,7 @@ absl_cc_test(
   COPTS
     ${ABSL_TEST_COPTS}
   DEPS
+    absl::core_headers
     absl::type_traits
     GTest::gmock_main
 )
diff --git a/third_party/abseil-cpp/absl/meta/type_traits.h b/third_party/abseil-cpp/absl/meta/type_traits.h
index d886cb30a8..6e6001fe8e 100644
--- a/third_party/abseil-cpp/absl/meta/type_traits.h
+++ b/third_party/abseil-cpp/absl/meta/type_traits.h
@@ -298,8 +298,12 @@ struct is_function
 // https://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html#Type-Traits.
 template <typename T>
 struct is_trivially_destructible
+#ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
+    : std::is_trivially_destructible<T> {
+#else
     : std::integral_constant<bool, __has_trivial_destructor(T) &&
                                    std::is_destructible<T>::value> {
+#endif
 #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
  private:
   static constexpr bool compliant = std::is_trivially_destructible<T>::value ==
@@ -347,9 +351,13 @@ struct is_trivially_destructible
 // Nontrivially destructible types will cause the expression to be nontrivial.
 template <typename T>
 struct is_trivially_default_constructible
+#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE)
+    : std::is_trivially_default_constructible<T> {
+#else
     : std::integral_constant<bool, __has_trivial_constructor(T) &&
                                    std::is_default_constructible<T>::value &&
                                    is_trivially_destructible<T>::value> {
+#endif
 #if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE) && \
     !defined(                                            \
         ABSL_META_INTERNAL_STD_CONSTRUCTION_TRAITS_DONT_CHECK_DESTRUCTION)
@@ -381,10 +389,14 @@ struct is_trivially_default_constructible
 // expression to be nontrivial.
 template <typename T>
 struct is_trivially_move_constructible
+#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE)
+    : std::is_trivially_move_constructible<T> {
+#else
     : std::conditional<
           std::is_object<T>::value && !std::is_array<T>::value,
           type_traits_internal::IsTriviallyMoveConstructibleObject<T>,
           std::is_reference<T>>::type::type {
+#endif
 #if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE) && \
     !defined(                                            \
         ABSL_META_INTERNAL_STD_CONSTRUCTION_TRAITS_DONT_CHECK_DESTRUCTION)
@@ -490,9 +502,13 @@ struct is_trivially_move_assignable
 // `is_trivially_assignable<T&, const T&>`.
 template <typename T>
 struct is_trivially_copy_assignable
+#ifdef ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
+    : std::is_trivially_copy_assignable<T> {
+#else
     : std::integral_constant<
           bool, __has_trivial_assign(typename std::remove_reference<T>::type) &&
                     absl::is_copy_assignable<T>::value> {
+#endif
 #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
  private:
   static constexpr bool compliant =
@@ -544,6 +560,11 @@ namespace type_traits_internal {
 // destructible. Arrays of trivially copyable types are trivially copyable.
 //
 // We expose this metafunction only for internal use within absl.
+
+#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE)
+template <typename T>
+struct is_trivially_copyable : std::is_trivially_copyable<T> {};
+#else
 template <typename T>
 class is_trivially_copyable_impl {
   using ExtentsRemoved = typename std::remove_all_extents<T>::type;
@@ -569,6 +590,7 @@ template <typename T>
 struct is_trivially_copyable
     : std::integral_constant<
           bool, type_traits_internal::is_trivially_copyable_impl<T>::kValue> {};
+#endif
 }  // namespace type_traits_internal
 
 // -----------------------------------------------------------------------------
@@ -791,6 +813,34 @@ using swap_internal::Swap;
 using swap_internal::StdSwapIsUnconstrained;
 
 }  // namespace type_traits_internal
+
+// absl::is_trivially_relocatable<T>
+// Detects whether a type is "trivially relocatable" -- meaning it can be
+// relocated without invoking the constructor/destructor, using a form of move
+// elision.
+//
+// Example:
+//
+// if constexpr (absl::is_trivially_relocatable<T>::value) {
+//   memcpy(new_location, old_location, sizeof(T));
+// } else {
+//   new(new_location) T(std::move(*old_location));
+//   old_location->~T();
+// }
+//
+// Upstream documentation:
+//
+// https://clang.llvm.org/docs/LanguageExtensions.html#:~:text=__is_trivially_relocatable
+//
+#if ABSL_HAVE_BUILTIN(__is_trivially_relocatable)
+template <class T>
+struct is_trivially_relocatable
+    : std::integral_constant<bool, __is_trivially_relocatable(T)> {};
+#else
+template <class T>
+struct is_trivially_relocatable : std::integral_constant<bool, false> {};
+#endif
+
 ABSL_NAMESPACE_END
 }  // namespace absl
 
diff --git a/third_party/abseil-cpp/absl/meta/type_traits_test.cc b/third_party/abseil-cpp/absl/meta/type_traits_test.cc
index 0ef5b66558..d08d9ad97c 100644
--- a/third_party/abseil-cpp/absl/meta/type_traits_test.cc
+++ b/third_party/abseil-cpp/absl/meta/type_traits_test.cc
@@ -21,6 +21,7 @@
 #include <vector>
 
 #include "gtest/gtest.h"
+#include "absl/base/attributes.h"
 
 namespace {
 
@@ -336,6 +337,7 @@ struct MovableNonCopyable {
 
 struct NonCopyableOrMovable {
   NonCopyableOrMovable() = default;
+  virtual ~NonCopyableOrMovable() = default;
   NonCopyableOrMovable(const NonCopyableOrMovable&) = delete;
   NonCopyableOrMovable(NonCopyableOrMovable&&) = delete;
   NonCopyableOrMovable& operator=(const NonCopyableOrMovable&) = delete;
@@ -1393,4 +1395,22 @@ TEST(TypeTraitsTest, IsNothrowSwappable) {
   EXPECT_TRUE(IsNothrowSwappable<adl_namespace::SpecialNoexceptSwap>::value);
 }
 
+TEST(TrivallyRelocatable, Sanity) {
+#if !defined(ABSL_HAVE_ATTRIBUTE_TRIVIAL_ABI) || \
+    !ABSL_HAVE_BUILTIN(__is_trivially_relocatable)
+  GTEST_SKIP() << "No trivial ABI support.";
+#endif
+
+  struct Trivial {};
+  struct NonTrivial {
+    NonTrivial(const NonTrivial&) {}  // NOLINT
+  };
+  struct ABSL_ATTRIBUTE_TRIVIAL_ABI TrivialAbi {
+    TrivialAbi(const TrivialAbi&) {}  // NOLINT
+  };
+  EXPECT_TRUE(absl::is_trivially_relocatable<Trivial>::value);
+  EXPECT_FALSE(absl::is_trivially_relocatable<NonTrivial>::value);
+  EXPECT_TRUE(absl::is_trivially_relocatable<TrivialAbi>::value);
+}
+
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/numeric/BUILD.bazel b/third_party/abseil-cpp/absl/numeric/BUILD.bazel
index 1f9e0f2055..eaa27dfd74 100644
--- a/third_party/abseil-cpp/absl/numeric/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/numeric/BUILD.bazel
@@ -37,6 +37,20 @@ cc_library(
     ],
 )
 
+cc_binary(
+    name = "bits_benchmark",
+    testonly = 1,
+    srcs = ["bits_benchmark.cc"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    deps = [
+        ":bits",
+        "//absl/base:core_headers",
+        "//absl/random",
+        "@com_github_google_benchmark//:benchmark_main",
+    ],
+)
+
 cc_test(
     name = "bits_test",
     size = "small",
diff --git a/third_party/abseil-cpp/absl/numeric/BUILD.gn b/third_party/abseil-cpp/absl/numeric/BUILD.gn
new file mode 100644
index 0000000000..5a07dc4733
--- /dev/null
+++ b/third_party/abseil-cpp/absl/numeric/BUILD.gn
@@ -0,0 +1,35 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("bits") {
+  public = [
+    "bits.h",
+    "internal/bits.h",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_source_set("int128") {
+  sources = [
+    "int128.cc",
+    "int128_have_intrinsic.inc",
+    "int128_no_intrinsic.inc",
+  ]
+  public = [ "int128.h" ]
+  deps = [
+    ":bits",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_source_set("representation") {
+  public = [ "internal/representation.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
diff --git a/third_party/abseil-cpp/absl/numeric/bits.h b/third_party/abseil-cpp/absl/numeric/bits.h
index 52013ad49b..df81b9a929 100644
--- a/third_party/abseil-cpp/absl/numeric/bits.h
+++ b/third_party/abseil-cpp/absl/numeric/bits.h
@@ -131,7 +131,7 @@ has_single_bit(T x) noexcept {
 // fractional part discarded.
 template <class T>
 ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
+    typename std::enable_if<std::is_unsigned<T>::value, int>::type
     bit_width(T x) noexcept {
   return std::numeric_limits<T>::digits - countl_zero(x);
 }
diff --git a/third_party/abseil-cpp/absl/numeric/bits_benchmark.cc b/third_party/abseil-cpp/absl/numeric/bits_benchmark.cc
new file mode 100644
index 0000000000..719bfa8135
--- /dev/null
+++ b/third_party/abseil-cpp/absl/numeric/bits_benchmark.cc
@@ -0,0 +1,73 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstdint>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "absl/base/optimization.h"
+#include "absl/numeric/bits.h"
+#include "absl/random/random.h"
+
+namespace absl {
+namespace {
+
+template <typename T>
+static void BM_bitwidth(benchmark::State& state) {
+  const auto count = static_cast<size_t>(state.range(0));
+
+  absl::BitGen rng;
+  std::vector<T> values;
+  values.reserve(count);
+  for (size_t i = 0; i < count; ++i) {
+    values.push_back(absl::Uniform<T>(rng, 0, std::numeric_limits<T>::max()));
+  }
+
+  while (state.KeepRunningBatch(count)) {
+    for (size_t i = 0; i < count; ++i) {
+      benchmark::DoNotOptimize(values[i]);
+    }
+  }
+}
+BENCHMARK_TEMPLATE(BM_bitwidth, uint8_t)->Range(1, 1 << 20);
+BENCHMARK_TEMPLATE(BM_bitwidth, uint16_t)->Range(1, 1 << 20);
+BENCHMARK_TEMPLATE(BM_bitwidth, uint32_t)->Range(1, 1 << 20);
+BENCHMARK_TEMPLATE(BM_bitwidth, uint64_t)->Range(1, 1 << 20);
+
+template <typename T>
+static void BM_bitwidth_nonzero(benchmark::State& state) {
+  const auto count = static_cast<size_t>(state.range(0));
+
+  absl::BitGen rng;
+  std::vector<T> values;
+  values.reserve(count);
+  for (size_t i = 0; i < count; ++i) {
+    values.push_back(absl::Uniform<T>(rng, 1, std::numeric_limits<T>::max()));
+  }
+
+  while (state.KeepRunningBatch(count)) {
+    for (size_t i = 0; i < count; ++i) {
+      const T value = values[i];
+      ABSL_ASSUME(value > 0);
+      benchmark::DoNotOptimize(value);
+    }
+  }
+}
+BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint8_t)->Range(1, 1 << 20);
+BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint16_t)->Range(1, 1 << 20);
+BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint32_t)->Range(1, 1 << 20);
+BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint64_t)->Range(1, 1 << 20);
+
+}  // namespace
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/numeric/int128.cc b/third_party/abseil-cpp/absl/numeric/int128.cc
index 17d88744ae..e5526c6f59 100644
--- a/third_party/abseil-cpp/absl/numeric/int128.cc
+++ b/third_party/abseil-cpp/absl/numeric/int128.cc
@@ -42,11 +42,11 @@ namespace {
 //   Returns: 2
 inline ABSL_ATTRIBUTE_ALWAYS_INLINE int Fls128(uint128 n) {
   if (uint64_t hi = Uint128High64(n)) {
-    ABSL_INTERNAL_ASSUME(hi != 0);
+    ABSL_ASSUME(hi != 0);
     return 127 - countl_zero(hi);
   }
   const uint64_t low = Uint128Low64(n);
-  ABSL_INTERNAL_ASSUME(low != 0);
+  ABSL_ASSUME(low != 0);
   return 63 - countl_zero(low);
 }
 
@@ -209,15 +209,16 @@ std::ostream& operator<<(std::ostream& os, uint128 v) {
   // Add the requisite padding.
   std::streamsize width = os.width(0);
   if (static_cast<size_t>(width) > rep.size()) {
+    const size_t count = static_cast<size_t>(width) - rep.size();
     std::ios::fmtflags adjustfield = flags & std::ios::adjustfield;
     if (adjustfield == std::ios::left) {
-      rep.append(width - rep.size(), os.fill());
+      rep.append(count, os.fill());
     } else if (adjustfield == std::ios::internal &&
                (flags & std::ios::showbase) &&
                (flags & std::ios::basefield) == std::ios::hex && v != 0) {
-      rep.insert(2, width - rep.size(), os.fill());
+      rep.insert(2, count, os.fill());
     } else {
-      rep.insert(0, width - rep.size(), os.fill());
+      rep.insert(0, count, os.fill());
     }
   }
 
@@ -306,22 +307,23 @@ std::ostream& operator<<(std::ostream& os, int128 v) {
   // Add the requisite padding.
   std::streamsize width = os.width(0);
   if (static_cast<size_t>(width) > rep.size()) {
+    const size_t count = static_cast<size_t>(width) - rep.size();
     switch (flags & std::ios::adjustfield) {
       case std::ios::left:
-        rep.append(width - rep.size(), os.fill());
+        rep.append(count, os.fill());
         break;
       case std::ios::internal:
         if (print_as_decimal && (rep[0] == '+' || rep[0] == '-')) {
-          rep.insert(1, width - rep.size(), os.fill());
+          rep.insert(1, count, os.fill());
         } else if ((flags & std::ios::basefield) == std::ios::hex &&
                    (flags & std::ios::showbase) && v != 0) {
-          rep.insert(2, width - rep.size(), os.fill());
+          rep.insert(2, count, os.fill());
         } else {
-          rep.insert(0, width - rep.size(), os.fill());
+          rep.insert(0, count, os.fill());
         }
         break;
       default:  // std::ios::right
-        rep.insert(0, width - rep.size(), os.fill());
+        rep.insert(0, count, os.fill());
         break;
     }
   }
@@ -332,6 +334,7 @@ std::ostream& operator<<(std::ostream& os, int128 v) {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 namespace std {
 constexpr bool numeric_limits<absl::uint128>::is_specialized;
 constexpr bool numeric_limits<absl::uint128>::is_signed;
@@ -381,3 +384,4 @@ constexpr int numeric_limits<absl::int128>::max_exponent10;
 constexpr bool numeric_limits<absl::int128>::traps;
 constexpr bool numeric_limits<absl::int128>::tinyness_before;
 }  // namespace std
+#endif
diff --git a/third_party/abseil-cpp/absl/numeric/int128.h b/third_party/abseil-cpp/absl/numeric/int128.h
index c7ad96befd..7a899eec84 100644
--- a/third_party/abseil-cpp/absl/numeric/int128.h
+++ b/third_party/abseil-cpp/absl/numeric/int128.h
@@ -44,7 +44,7 @@
 // builtin type.  We need to make sure not to define operator wchar_t()
 // alongside operator unsigned short() in these instances.
 #define ABSL_INTERNAL_WCHAR_T __wchar_t
-#if defined(_M_X64)
+#if defined(_M_X64) && !defined(_M_ARM64EC)
 #include <intrin.h>
 #pragma intrinsic(_umul128)
 #endif  // defined(_M_X64)
@@ -980,7 +980,7 @@ inline uint128 operator*(uint128 lhs, uint128 rhs) {
   // can be used for uint128 storage.
   return static_cast<unsigned __int128>(lhs) *
          static_cast<unsigned __int128>(rhs);
-#elif defined(_MSC_VER) && defined(_M_X64)
+#elif defined(_MSC_VER) && defined(_M_X64) && !defined(_M_ARM64EC)
   uint64_t carry;
   uint64_t low = _umul128(Uint128Low64(lhs), Uint128Low64(rhs), &carry);
   return MakeUint128(Uint128Low64(lhs) * Uint128High64(rhs) +
diff --git a/third_party/abseil-cpp/absl/profiling/BUILD.bazel b/third_party/abseil-cpp/absl/profiling/BUILD.bazel
index 496a06b276..3392c96cd4 100644
--- a/third_party/abseil-cpp/absl/profiling/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/profiling/BUILD.bazel
@@ -43,6 +43,9 @@ cc_test(
     name = "sample_recorder_test",
     srcs = ["internal/sample_recorder_test.cc"],
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":sample_recorder",
         "//absl/base:core_headers",
diff --git a/third_party/abseil-cpp/absl/profiling/BUILD.gn b/third_party/abseil-cpp/absl/profiling/BUILD.gn
new file mode 100644
index 0000000000..e1e4bc9d6b
--- /dev/null
+++ b/third_party/abseil-cpp/absl/profiling/BUILD.gn
@@ -0,0 +1,51 @@
+# Copyright 2021 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("sample_recorder") {
+  public = [ "internal/sample_recorder.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("exponential_biased") {
+  sources = [ "internal/exponential_biased.cc" ]
+  public = [ "internal/exponential_biased.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_test("exponential_biased_test") {
+  sources = [ "internal/exponential_biased_test.cc" ]
+  deps = [
+    ":exponential_biased",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("periodic_sampler") {
+  sources = [ "internal/periodic_sampler.cc" ]
+  public = [ "internal/periodic_sampler.h" ]
+  deps = [
+    ":exponential_biased",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_test("periodic_sampler_test") {
+  sources = [ "internal/periodic_sampler_test.cc" ]
+  deps = [
+    ":periodic_sampler",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/profiling/internal/exponential_biased_test.cc b/third_party/abseil-cpp/absl/profiling/internal/exponential_biased_test.cc
index 5675001dd3..ebfbcad4f0 100644
--- a/third_party/abseil-cpp/absl/profiling/internal/exponential_biased_test.cc
+++ b/third_party/abseil-cpp/absl/profiling/internal/exponential_biased_test.cc
@@ -29,6 +29,7 @@ using ::testing::Ge;
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace profiling_internal {
+namespace {
 
 MATCHER_P2(IsBetween, a, b,
            absl::StrCat(std::string(negation ? "isn't" : "is"), " between ", a,
@@ -93,13 +94,14 @@ double AndersonDarlingPValue(int n, double z) {
 }
 
 double AndersonDarlingStatistic(const std::vector<double>& random_sample) {
-  int n = random_sample.size();
+  size_t n = random_sample.size();
   double ad_sum = 0;
-  for (int i = 0; i < n; i++) {
+  for (size_t i = 0; i < n; i++) {
     ad_sum += (2 * i + 1) *
               std::log(random_sample[i] * (1 - random_sample[n - 1 - i]));
   }
-  double ad_statistic = -n - 1 / static_cast<double>(n) * ad_sum;
+  const auto n_as_double = static_cast<double>(n);
+  double ad_statistic = -n_as_double - 1 / n_as_double * ad_sum;
   return ad_statistic;
 }
 
@@ -110,14 +112,15 @@ double AndersonDarlingStatistic(const std::vector<double>& random_sample) {
 // Marsaglia and Marsaglia for details.
 double AndersonDarlingTest(const std::vector<double>& random_sample) {
   double ad_statistic = AndersonDarlingStatistic(random_sample);
-  double p = AndersonDarlingPValue(random_sample.size(), ad_statistic);
+  double p = AndersonDarlingPValue(static_cast<int>(random_sample.size()),
+                                   ad_statistic);
   return p;
 }
 
 TEST(ExponentialBiasedTest, CoinTossDemoWithGetSkipCount) {
   ExponentialBiased eb;
   for (int runs = 0; runs < 10; ++runs) {
-    for (int flips = eb.GetSkipCount(1); flips > 0; --flips) {
+    for (int64_t flips = eb.GetSkipCount(1); flips > 0; --flips) {
       printf("head...");
     }
     printf("tail\n");
@@ -131,7 +134,7 @@ TEST(ExponentialBiasedTest, CoinTossDemoWithGetSkipCount) {
 
 TEST(ExponentialBiasedTest, SampleDemoWithStride) {
   ExponentialBiased eb;
-  int stride = eb.GetStride(10);
+  int64_t stride = eb.GetStride(10);
   int samples = 0;
   for (int i = 0; i < 10000000; ++i) {
     if (--stride == 0) {
@@ -146,7 +149,7 @@ TEST(ExponentialBiasedTest, SampleDemoWithStride) {
 // Testing that NextRandom generates uniform random numbers. Applies the
 // Anderson-Darling test for uniformity
 TEST(ExponentialBiasedTest, TestNextRandom) {
-  for (auto n : std::vector<int>({
+  for (auto n : std::vector<size_t>({
            10,  // Check short-range correlation
            100, 1000,
            10000  // Make sure there's no systemic error
@@ -160,7 +163,7 @@ TEST(ExponentialBiasedTest, TestNextRandom) {
     }
     std::vector<uint64_t> int_random_sample(n);
     // Collect samples
-    for (int i = 0; i < n; i++) {
+    for (size_t i = 0; i < n; i++) {
       int_random_sample[i] = x;
       x = ExponentialBiased::NextRandom(x);
     }
@@ -168,7 +171,7 @@ TEST(ExponentialBiasedTest, TestNextRandom) {
     std::sort(int_random_sample.begin(), int_random_sample.end());
     std::vector<double> random_sample(n);
     // Convert them to uniform randoms (in the range [0,1])
-    for (int i = 0; i < n; i++) {
+    for (size_t i = 0; i < n; i++) {
       random_sample[i] =
           static_cast<double>(int_random_sample[i]) / max_prng_value;
     }
@@ -194,6 +197,7 @@ TEST(ExponentialBiasedTest, InitializationModes) {
   EXPECT_THAT(eb_stack.GetSkipCount(2), Ge(0));
 }
 
+}  // namespace
 }  // namespace profiling_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/profiling/internal/sample_recorder.h b/third_party/abseil-cpp/absl/profiling/internal/sample_recorder.h
index 5e04a9cd19..ef1489b1f6 100644
--- a/third_party/abseil-cpp/absl/profiling/internal/sample_recorder.h
+++ b/third_party/abseil-cpp/absl/profiling/internal/sample_recorder.h
@@ -46,6 +46,7 @@ struct Sample {
   absl::Mutex init_mu;
   T* next = nullptr;
   T* dead ABSL_GUARDED_BY(init_mu) = nullptr;
+  int64_t weight;  // How many sampling events were required to sample this one.
 };
 
 // Holds samples and their associated stack traces with a soft limit of
@@ -59,7 +60,8 @@ class SampleRecorder {
   ~SampleRecorder();
 
   // Registers for sampling.  Returns an opaque registration info.
-  T* Register();
+  template <typename... Targs>
+  T* Register(Targs&&... args);
 
   // Unregisters the sample.
   void Unregister(T* sample);
@@ -75,16 +77,18 @@ class SampleRecorder {
   // samples that have been dropped.
   int64_t Iterate(const std::function<void(const T& stack)>& f);
 
-  void SetMaxSamples(int32_t max);
+  size_t GetMaxSamples() const;
+  void SetMaxSamples(size_t max);
 
  private:
   void PushNew(T* sample);
   void PushDead(T* sample);
-  T* PopDead();
+  template <typename... Targs>
+  T* PopDead(Targs... args);
 
   std::atomic<size_t> dropped_samples_;
   std::atomic<size_t> size_estimate_;
-  std::atomic<int32_t> max_samples_{1 << 20};
+  std::atomic<size_t> max_samples_{1 << 20};
 
   // Intrusive lock free linked lists for tracking samples.
   //
@@ -162,7 +166,8 @@ void SampleRecorder<T>::PushDead(T* sample) {
 }
 
 template <typename T>
-T* SampleRecorder<T>::PopDead() {
+template <typename... Targs>
+T* SampleRecorder<T>::PopDead(Targs... args) {
   absl::MutexLock graveyard_lock(&graveyard_.init_mu);
 
   // The list is circular, so eventually it collapses down to
@@ -174,23 +179,28 @@ T* SampleRecorder<T>::PopDead() {
   absl::MutexLock sample_lock(&sample->init_mu);
   graveyard_.dead = sample->dead;
   sample->dead = nullptr;
-  sample->PrepareForSampling();
+  sample->PrepareForSampling(std::forward<Targs>(args)...);
   return sample;
 }
 
 template <typename T>
-T* SampleRecorder<T>::Register() {
-  int64_t size = size_estimate_.fetch_add(1, std::memory_order_relaxed);
+template <typename... Targs>
+T* SampleRecorder<T>::Register(Targs&&... args) {
+  size_t size = size_estimate_.fetch_add(1, std::memory_order_relaxed);
   if (size > max_samples_.load(std::memory_order_relaxed)) {
     size_estimate_.fetch_sub(1, std::memory_order_relaxed);
     dropped_samples_.fetch_add(1, std::memory_order_relaxed);
     return nullptr;
   }
 
-  T* sample = PopDead();
+  T* sample = PopDead(args...);
   if (sample == nullptr) {
     // Resurrection failed.  Hire a new warlock.
     sample = new T();
+    {
+      absl::MutexLock sample_lock(&sample->init_mu);
+      sample->PrepareForSampling(std::forward<Targs>(args)...);
+    }
     PushNew(sample);
   }
 
@@ -219,10 +229,15 @@ int64_t SampleRecorder<T>::Iterate(
 }
 
 template <typename T>
-void SampleRecorder<T>::SetMaxSamples(int32_t max) {
+void SampleRecorder<T>::SetMaxSamples(size_t max) {
   max_samples_.store(max, std::memory_order_release);
 }
 
+template <typename T>
+size_t SampleRecorder<T>::GetMaxSamples() const {
+  return max_samples_.load(std::memory_order_acquire);
+}
+
 }  // namespace profiling_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/profiling/internal/sample_recorder_test.cc b/third_party/abseil-cpp/absl/profiling/internal/sample_recorder_test.cc
index ec6e0fa22d..3373329a8a 100644
--- a/third_party/abseil-cpp/absl/profiling/internal/sample_recorder_test.cc
+++ b/third_party/abseil-cpp/absl/profiling/internal/sample_recorder_test.cc
@@ -36,7 +36,7 @@ using ::testing::UnorderedElementsAre;
 
 struct Info : public Sample<Info> {
  public:
-  void PrepareForSampling() {}
+  void PrepareForSampling(int64_t w) { weight = w; }
   std::atomic<size_t> size;
   absl::Time create_time;
 };
@@ -49,8 +49,14 @@ std::vector<size_t> GetSizes(SampleRecorder<Info>* s) {
   return res;
 }
 
-Info* Register(SampleRecorder<Info>* s, size_t size) {
-  auto* info = s->Register();
+std::vector<int64_t> GetWeights(SampleRecorder<Info>* s) {
+  std::vector<int64_t> res;
+  s->Iterate([&](const Info& info) { res.push_back(info.weight); });
+  return res;
+}
+
+Info* Register(SampleRecorder<Info>* s, int64_t weight, size_t size) {
+  auto* info = s->Register(weight);
   assert(info != nullptr);
   info->size.store(size);
   return info;
@@ -58,13 +64,15 @@ Info* Register(SampleRecorder<Info>* s, size_t size) {
 
 TEST(SampleRecorderTest, Registration) {
   SampleRecorder<Info> sampler;
-  auto* info1 = Register(&sampler, 1);
+  auto* info1 = Register(&sampler, 31, 1);
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(1));
+  EXPECT_THAT(GetWeights(&sampler), UnorderedElementsAre(31));
 
-  auto* info2 = Register(&sampler, 2);
+  auto* info2 = Register(&sampler, 32, 2);
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(1, 2));
   info1->size.store(3);
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(3, 2));
+  EXPECT_THAT(GetWeights(&sampler), UnorderedElementsAre(31, 32));
 
   sampler.Unregister(info1);
   sampler.Unregister(info2);
@@ -74,18 +82,22 @@ TEST(SampleRecorderTest, Unregistration) {
   SampleRecorder<Info> sampler;
   std::vector<Info*> infos;
   for (size_t i = 0; i < 3; ++i) {
-    infos.push_back(Register(&sampler, i));
+    infos.push_back(Register(&sampler, 33 + i, i));
   }
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 1, 2));
+  EXPECT_THAT(GetWeights(&sampler), UnorderedElementsAre(33, 34, 35));
 
   sampler.Unregister(infos[1]);
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 2));
+  EXPECT_THAT(GetWeights(&sampler), UnorderedElementsAre(33, 35));
 
-  infos.push_back(Register(&sampler, 3));
-  infos.push_back(Register(&sampler, 4));
+  infos.push_back(Register(&sampler, 36, 3));
+  infos.push_back(Register(&sampler, 37, 4));
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 2, 3, 4));
+  EXPECT_THAT(GetWeights(&sampler), UnorderedElementsAre(33, 35, 36, 37));
   sampler.Unregister(infos[3]);
   EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 2, 4));
+  EXPECT_THAT(GetWeights(&sampler), UnorderedElementsAre(33, 35, 37));
 
   sampler.Unregister(infos[0]);
   sampler.Unregister(infos[2]);
@@ -99,18 +111,18 @@ TEST(SampleRecorderTest, MultiThreaded) {
   ThreadPool pool(10);
 
   for (int i = 0; i < 10; ++i) {
-    pool.Schedule([&sampler, &stop]() {
+    pool.Schedule([&sampler, &stop, i]() {
       std::random_device rd;
       std::mt19937 gen(rd());
 
       std::vector<Info*> infoz;
       while (!stop.HasBeenNotified()) {
         if (infoz.empty()) {
-          infoz.push_back(sampler.Register());
+          infoz.push_back(sampler.Register(i));
         }
         switch (std::uniform_int_distribution<>(0, 2)(gen)) {
           case 0: {
-            infoz.push_back(sampler.Register());
+            infoz.push_back(sampler.Register(i));
             break;
           }
           case 1: {
@@ -119,6 +131,7 @@ TEST(SampleRecorderTest, MultiThreaded) {
             Info* info = infoz[p];
             infoz[p] = infoz.back();
             infoz.pop_back();
+            EXPECT_EQ(info->weight, i);
             sampler.Unregister(info);
             break;
           }
@@ -143,8 +156,8 @@ TEST(SampleRecorderTest, MultiThreaded) {
 TEST(SampleRecorderTest, Callback) {
   SampleRecorder<Info> sampler;
 
-  auto* info1 = Register(&sampler, 1);
-  auto* info2 = Register(&sampler, 2);
+  auto* info1 = Register(&sampler, 39, 1);
+  auto* info2 = Register(&sampler, 40, 2);
 
   static const Info* expected;
 
diff --git a/third_party/abseil-cpp/absl/random/BUILD.bazel b/third_party/abseil-cpp/absl/random/BUILD.bazel
index fdde78b606..ff20dd05c1 100644
--- a/third_party/abseil-cpp/absl/random/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/random/BUILD.bazel
@@ -100,8 +100,7 @@ cc_library(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":seed_gen_exception",
-        "//absl/container:inlined_vector",
-        "//absl/random/internal:nonsecure_base",
+        "//absl/base:config",
         "//absl/random/internal:pool_urbg",
         "//absl/random/internal:salted_seed_seq",
         "//absl/random/internal:seed_material",
@@ -128,6 +127,7 @@ cc_library(
     name = "mock_distributions",
     testonly = 1,
     hdrs = ["mock_distributions.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":distributions",
         ":mocking_bit_gen",
@@ -183,6 +183,9 @@ cc_test(
     copts = ABSL_TEST_COPTS,
     flaky = 1,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":distributions",
         ":random",
@@ -235,6 +238,9 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",  # Does not converge on WASM.
+    ],
     deps = [
         ":distributions",
         ":random",
@@ -300,6 +306,7 @@ cc_test(
 cc_test(
     name = "exponential_distribution_test",
     size = "small",
+    timeout = "moderate",
     srcs = ["exponential_distribution_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
@@ -429,6 +436,9 @@ cc_test(
     srcs = ["mocking_bit_gen_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":bit_gen_ref",
         ":mock_distributions",
@@ -444,6 +454,9 @@ cc_test(
     srcs = ["mock_distributions_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":mock_distributions",
         ":mocking_bit_gen",
@@ -458,6 +471,9 @@ cc_test(
     srcs = ["examples_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":random",
         "@com_google_googletest//:gtest_main",
diff --git a/third_party/abseil-cpp/absl/random/BUILD.gn b/third_party/abseil-cpp/absl/random/BUILD.gn
new file mode 100644
index 0000000000..7345970956
--- /dev/null
+++ b/third_party/abseil-cpp/absl/random/BUILD.gn
@@ -0,0 +1,84 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("random") {
+  public = [ "random.h" ]
+  deps = [
+    ":distributions",
+    ":seed_sequences",
+    "//third_party/abseil-cpp/absl/random/internal:nonsecure_base",
+    "//third_party/abseil-cpp/absl/random/internal:pcg_engine",
+    "//third_party/abseil-cpp/absl/random/internal:pool_urbg",
+    "//third_party/abseil-cpp/absl/random/internal:randen_engine",
+  ]
+}
+
+absl_source_set("distributions") {
+  public = [
+    "bernoulli_distribution.h",
+    "beta_distribution.h",
+    "discrete_distribution.h",
+    "distributions.h",
+    "exponential_distribution.h",
+    "gaussian_distribution.h",
+    "log_uniform_int_distribution.h",
+    "poisson_distribution.h",
+    "uniform_int_distribution.h",
+    "uniform_real_distribution.h",
+    "zipf_distribution.h",
+  ]
+  sources = [
+    "discrete_distribution.cc",
+    "gaussian_distribution.cc",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/random/internal:distribution_caller",
+    "//third_party/abseil-cpp/absl/random/internal:fast_uniform_bits",
+    "//third_party/abseil-cpp/absl/random/internal:fastmath",
+    "//third_party/abseil-cpp/absl/random/internal:generate_real",
+    "//third_party/abseil-cpp/absl/random/internal:iostream_state_saver",
+    "//third_party/abseil-cpp/absl/random/internal:traits",
+    "//third_party/abseil-cpp/absl/random/internal:uniform_helper",
+    "//third_party/abseil-cpp/absl/random/internal:wide_multiply",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_source_set("seed_gen_exception") {
+  public = [ "seed_gen_exception.h" ]
+  sources = [ "seed_gen_exception.cc" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("seed_sequences") {
+  public = [ "seed_sequences.h" ]
+  sources = [ "seed_sequences.cc" ]
+  deps = [
+    ":seed_gen_exception",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/random/internal:pool_urbg",
+    "//third_party/abseil-cpp/absl/random/internal:salted_seed_seq",
+    "//third_party/abseil-cpp/absl/random/internal:seed_material",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("bit_gen_ref") {
+  public = [ "bit_gen_ref.h" ]
+  deps = [
+    ":random",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:fast_type_id",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/random/internal:distribution_caller",
+    "//third_party/abseil-cpp/absl/random/internal:fast_uniform_bits",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/random/CMakeLists.txt b/third_party/abseil-cpp/absl/random/CMakeLists.txt
index 9d1c67fb33..c74fd30064 100644
--- a/third_party/abseil-cpp/absl/random/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/random/CMakeLists.txt
@@ -121,6 +121,7 @@ absl_cc_library(
     absl::variant
     GTest::gmock
     GTest::gtest
+  PUBLIC
   TESTONLY
 )
 
@@ -222,8 +223,8 @@ absl_cc_library(
   LINKOPTS
     ${ABSL_DEFAULT_LINKOPTS}
   DEPS
+    absl::config
     absl::inlined_vector
-    absl::random_internal_nonsecure_base
     absl::random_internal_pool_urbg
     absl::random_internal_salted_seed_seq
     absl::random_internal_seed_material
@@ -568,7 +569,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   LINKOPTS
     ${ABSL_DEFAULT_LINKOPTS}
-    $<$<BOOL:${MINGW}>:"bcrypt">
+    $<$<BOOL:${MINGW}>:-lbcrypt>
   DEPS
     absl::core_headers
     absl::optional
@@ -726,7 +727,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_LINKOPTS}
   DEPS
     absl::core_headers
-    absl::optional
+    absl::inlined_vector
     absl::random_internal_pool_urbg
     absl::random_internal_salted_seed_seq
     absl::random_internal_seed_material
@@ -1210,5 +1211,6 @@ absl_cc_test(
     absl::random_internal_wide_multiply
     absl::bits
     absl::int128
+    GTest::gmock
     GTest::gtest_main
 )
diff --git a/third_party/abseil-cpp/absl/random/bernoulli_distribution.h b/third_party/abseil-cpp/absl/random/bernoulli_distribution.h
index 25bd0d5ca4..d81b6ae6b1 100644
--- a/third_party/abseil-cpp/absl/random/bernoulli_distribution.h
+++ b/third_party/abseil-cpp/absl/random/bernoulli_distribution.h
@@ -138,16 +138,16 @@ bool bernoulli_distribution::Generate(double p,
     // 64 bits.
     //
     // Second, `c` is constructed by first casting explicitly to a signed
-    // integer and then converting implicitly to an unsigned integer of the same
+    // integer and then casting explicitly to an unsigned integer of the same
     // size.  This is done because the hardware conversion instructions produce
     // signed integers from double; if taken as a uint64_t the conversion would
     // be wrong for doubles greater than 2^63 (not relevant in this use-case).
     // If converted directly to an unsigned integer, the compiler would end up
     // emitting code to handle such large values that are not relevant due to
     // the known bounds on `c`.  To avoid these extra instructions this
-    // implementation converts first to the signed type and then use the
-    // implicit conversion to unsigned (which is a no-op).
-    const uint64_t c = static_cast<int64_t>(p * kP32);
+    // implementation converts first to the signed type and then convert to
+    // unsigned (which is a no-op).
+    const uint64_t c = static_cast<uint64_t>(static_cast<int64_t>(p * kP32));
     const uint32_t v = fast_u32(g);
     // FAST PATH: this path fails with probability 1/2^32.  Note that simply
     // returning v <= c would approximate P very well (up to an absolute error
diff --git a/third_party/abseil-cpp/absl/random/beta_distribution_test.cc b/third_party/abseil-cpp/absl/random/beta_distribution_test.cc
index d980c969f7..c16fbb4f0e 100644
--- a/third_party/abseil-cpp/absl/random/beta_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/beta_distribution_test.cc
@@ -45,16 +45,26 @@ namespace {
 template <typename IntType>
 class BetaDistributionInterfaceTest : public ::testing::Test {};
 
-// double-double arithmetic is not supported well by either GCC or Clang; see
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99048,
-// https://bugs.llvm.org/show_bug.cgi?id=49131, and
-// https://bugs.llvm.org/show_bug.cgi?id=49132. Don't bother running these tests
-// with double doubles until compiler support is better.
-using RealTypes =
-    std::conditional<absl::numeric_internal::IsDoubleDouble(),
-                     ::testing::Types<float, double>,
-                     ::testing::Types<float, double, long double>>::type;
-TYPED_TEST_CASE(BetaDistributionInterfaceTest, RealTypes);
+constexpr bool ShouldExerciseLongDoubleTests() {
+  // long double arithmetic is not supported well by either GCC or Clang on
+  // most platforms specifically not when implemented in terms of double-double;
+  // see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99048,
+  // https://bugs.llvm.org/show_bug.cgi?id=49131, and
+  // https://bugs.llvm.org/show_bug.cgi?id=49132.
+  // So a conservative choice here is to disable long-double tests pretty much
+  // everywhere except on x64 but only if long double is not implemented as
+  // double-double.
+#if defined(__i686__) && defined(__x86_64__)
+  return !absl::numeric_internal::IsDoubleDouble();
+#else
+  return false;
+#endif
+}
+
+using RealTypes = std::conditional<ShouldExerciseLongDoubleTests(),
+                                   ::testing::Types<float, double, long double>,
+                                   ::testing::Types<float, double>>::type;
+TYPED_TEST_SUITE(BetaDistributionInterfaceTest, RealTypes);
 
 TYPED_TEST(BetaDistributionInterfaceTest, SerializeTest) {
   // The threshold for whether std::exp(1/a) is finite.
@@ -431,13 +441,13 @@ std::string ParamName(
   return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
 }
 
-INSTANTIATE_TEST_CASE_P(
+INSTANTIATE_TEST_SUITE_P(
     TestSampleStatisticsCombinations, BetaDistributionTest,
     ::testing::Combine(::testing::Values(0.1, 0.2, 0.9, 1.1, 2.5, 10.0, 123.4),
                        ::testing::Values(0.1, 0.2, 0.9, 1.1, 2.5, 10.0, 123.4)),
     ParamName);
 
-INSTANTIATE_TEST_CASE_P(
+INSTANTIATE_TEST_SUITE_P(
     TestSampleStatistics_SelectedPairs, BetaDistributionTest,
     ::testing::Values(std::make_pair(0.5, 1000), std::make_pair(1000, 0.5),
                       std::make_pair(900, 1000), std::make_pair(10000, 20000),
diff --git a/third_party/abseil-cpp/absl/random/bit_gen_ref.h b/third_party/abseil-cpp/absl/random/bit_gen_ref.h
index 9555460fd4..e475221a15 100644
--- a/third_party/abseil-cpp/absl/random/bit_gen_ref.h
+++ b/third_party/abseil-cpp/absl/random/bit_gen_ref.h
@@ -24,6 +24,10 @@
 #ifndef ABSL_RANDOM_BIT_GEN_REF_H_
 #define ABSL_RANDOM_BIT_GEN_REF_H_
 
+#include <limits>
+#include <type_traits>
+#include <utility>
+
 #include "absl/base/internal/fast_type_id.h"
 #include "absl/base/macros.h"
 #include "absl/meta/type_traits.h"
diff --git a/third_party/abseil-cpp/absl/random/distributions.h b/third_party/abseil-cpp/absl/random/distributions.h
index 31c79694e5..37fc3aa7fd 100644
--- a/third_party/abseil-cpp/absl/random/distributions.h
+++ b/third_party/abseil-cpp/absl/random/distributions.h
@@ -373,7 +373,7 @@ RealType Gaussian(URBG&& urbg,  // NOLINT(runtime/references)
 template <typename IntType, typename URBG>
 IntType LogUniform(URBG&& urbg,  // NOLINT(runtime/references)
                    IntType lo, IntType hi, IntType base = 2) {
-  static_assert(std::is_integral<IntType>::value,
+  static_assert(random_internal::IsIntegral<IntType>::value,
                 "Template-argument 'IntType' must be an integral type, in "
                 "absl::LogUniform<IntType, URBG>(...)");
 
@@ -403,7 +403,7 @@ IntType LogUniform(URBG&& urbg,  // NOLINT(runtime/references)
 template <typename IntType, typename URBG>
 IntType Poisson(URBG&& urbg,  // NOLINT(runtime/references)
                 double mean = 1.0) {
-  static_assert(std::is_integral<IntType>::value,
+  static_assert(random_internal::IsIntegral<IntType>::value,
                 "Template-argument 'IntType' must be an integral type, in "
                 "absl::Poisson<IntType, URBG>(...)");
 
@@ -435,7 +435,7 @@ template <typename IntType, typename URBG>
 IntType Zipf(URBG&& urbg,  // NOLINT(runtime/references)
              IntType hi = (std::numeric_limits<IntType>::max)(), double q = 2.0,
              double v = 1.0) {
-  static_assert(std::is_integral<IntType>::value,
+  static_assert(random_internal::IsIntegral<IntType>::value,
                 "Template-argument 'IntType' must be an integral type, in "
                 "absl::Zipf<IntType, URBG>(...)");
 
diff --git a/third_party/abseil-cpp/absl/random/distributions_test.cc b/third_party/abseil-cpp/absl/random/distributions_test.cc
index d3a5dd75e5..5321a11c85 100644
--- a/third_party/abseil-cpp/absl/random/distributions_test.cc
+++ b/third_party/abseil-cpp/absl/random/distributions_test.cc
@@ -220,6 +220,7 @@ TEST_F(RandomDistributionsTest, UniformNoBounds) {
   absl::Uniform<uint16_t>(gen);
   absl::Uniform<uint32_t>(gen);
   absl::Uniform<uint64_t>(gen);
+  absl::Uniform<absl::uint128>(gen);
 }
 
 TEST_F(RandomDistributionsTest, UniformNonsenseRanges) {
diff --git a/third_party/abseil-cpp/absl/random/exponential_distribution_test.cc b/third_party/abseil-cpp/absl/random/exponential_distribution_test.cc
index 81a5d17bac..3c44d9ec5b 100644
--- a/third_party/abseil-cpp/absl/random/exponential_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/exponential_distribution_test.cc
@@ -58,7 +58,7 @@ using RealTypes =
     std::conditional<absl::numeric_internal::IsDoubleDouble(),
                      ::testing::Types<float, double>,
                      ::testing::Types<float, double, long double>>::type;
-TYPED_TEST_CASE(ExponentialDistributionTypedTest, RealTypes);
+TYPED_TEST_SUITE(ExponentialDistributionTypedTest, RealTypes);
 
 TYPED_TEST(ExponentialDistributionTypedTest, SerializeTest) {
   using param_type =
@@ -343,8 +343,8 @@ std::string ParamName(const ::testing::TestParamInfo<Param>& info) {
   return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
 }
 
-INSTANTIATE_TEST_CASE_P(All, ExponentialDistributionTests,
-                        ::testing::ValuesIn(GenParams()), ParamName);
+INSTANTIATE_TEST_SUITE_P(All, ExponentialDistributionTests,
+                         ::testing::ValuesIn(GenParams()), ParamName);
 
 // NOTE: absl::exponential_distribution is not guaranteed to be stable.
 TEST(ExponentialDistributionTest, StabilityTest) {
diff --git a/third_party/abseil-cpp/absl/random/gaussian_distribution_test.cc b/third_party/abseil-cpp/absl/random/gaussian_distribution_test.cc
index c0bac2b0db..4584ac9205 100644
--- a/third_party/abseil-cpp/absl/random/gaussian_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/gaussian_distribution_test.cc
@@ -54,7 +54,7 @@ using RealTypes =
     std::conditional<absl::numeric_internal::IsDoubleDouble(),
                      ::testing::Types<float, double>,
                      ::testing::Types<float, double, long double>>::type;
-TYPED_TEST_CASE(GaussianDistributionInterfaceTest, RealTypes);
+TYPED_TEST_SUITE(GaussianDistributionInterfaceTest, RealTypes);
 
 TYPED_TEST(GaussianDistributionInterfaceTest, SerializeTest) {
   using param_type =
diff --git a/third_party/abseil-cpp/absl/random/generators_test.cc b/third_party/abseil-cpp/absl/random/generators_test.cc
index 41725f139c..14fd24e9b6 100644
--- a/third_party/abseil-cpp/absl/random/generators_test.cc
+++ b/third_party/abseil-cpp/absl/random/generators_test.cc
@@ -107,6 +107,8 @@ void TestPoisson(URBG* gen) {
   absl::Poisson<int64_t>(*gen);
   absl::Poisson<uint64_t>(*gen);
   absl::Poisson<uint64_t>(URBG());
+  absl::Poisson<absl::int128>(*gen);
+  absl::Poisson<absl::uint128>(*gen);
 }
 
 template <typename URBG>
@@ -126,6 +128,8 @@ void TestZipf(URBG* gen) {
   absl::Zipf<int64_t>(*gen, 1 << 10);
   absl::Zipf<uint64_t>(*gen, 1 << 10);
   absl::Zipf<uint64_t>(URBG(), 1 << 10);
+  absl::Zipf<absl::int128>(*gen, 1 << 10);
+  absl::Zipf<absl::uint128>(*gen, 1 << 10);
 }
 
 template <typename URBG>
@@ -146,6 +150,8 @@ void TestLogNormal(URBG* gen) {
   absl::LogUniform<int64_t>(*gen, 0, 1 << 10);
   absl::LogUniform<uint64_t>(*gen, 0, 1 << 10);
   absl::LogUniform<uint64_t>(URBG(), 0, 1 << 10);
+  absl::LogUniform<absl::int128>(*gen, 0, 1 << 10);
+  absl::LogUniform<absl::uint128>(*gen, 0, 1 << 10);
 }
 
 template <typename URBG>
diff --git a/third_party/abseil-cpp/absl/random/internal/BUILD.bazel b/third_party/abseil-cpp/absl/random/internal/BUILD.bazel
index e93eebb68d..fd5b61958c 100644
--- a/third_party/abseil-cpp/absl/random/internal/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/random/internal/BUILD.bazel
@@ -35,7 +35,11 @@ cc_library(
     hdrs = ["traits.h"],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/base:config"],
+    deps = [
+        "//absl/base:config",
+        "//absl/numeric:bits",
+        "//absl/numeric:int128",
+    ],
 )
 
 cc_library(
@@ -58,6 +62,7 @@ cc_library(
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
+        ":traits",
         "//absl/base:config",
         "//absl/meta:type_traits",
     ],
@@ -217,8 +222,8 @@ cc_library(
         ":salted_seed_seq",
         ":seed_material",
         "//absl/base:core_headers",
+        "//absl/container:inlined_vector",
         "//absl/meta:type_traits",
-        "//absl/types:optional",
         "//absl/types:span",
     ],
 )
@@ -497,6 +502,7 @@ cc_test(
 cc_library(
     name = "mock_helpers",
     hdrs = ["mock_helpers.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:fast_type_id",
         "//absl/types:optional",
@@ -507,6 +513,7 @@ cc_library(
     name = "mock_overload_set",
     testonly = 1,
     hdrs = ["mock_overload_set.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":mock_helpers",
         "//absl/random:mocking_bit_gen",
@@ -674,6 +681,7 @@ cc_library(
         ":traits",
         "//absl/base:config",
         "//absl/meta:type_traits",
+        "//absl/numeric:int128",
     ],
 )
 
@@ -687,6 +695,7 @@ cc_test(
         "benchmark",
         "no_test_ios_x86_64",
         "no_test_loonix",  # Crashing.
+        "no_test_wasm",
     ],
     deps = [
         ":nanobenchmark",
diff --git a/third_party/abseil-cpp/absl/random/internal/BUILD.gn b/third_party/abseil-cpp/absl/random/internal/BUILD.gn
new file mode 100644
index 0000000000..199fe6d8a1
--- /dev/null
+++ b/third_party/abseil-cpp/absl/random/internal/BUILD.gn
@@ -0,0 +1,275 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("traits") {
+  public = [ "traits.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+absl_source_set("distribution_caller") {
+  public = [ "distribution_caller.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:fast_type_id",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("fast_uniform_bits") {
+  public = [ "fast_uniform_bits.h" ]
+  deps = [
+    ":traits",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("seed_material") {
+  public = [ "seed_material.h" ]
+  sources = [ "seed_material.cc" ]
+  if (is_win) {
+    # TODO(mbonadei): In the bazel file this is -DEFAULTLIB:bcrypt.lib.
+    libs = [ "bcrypt.lib" ]
+  }
+  deps = [
+    ":fast_uniform_bits",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("pool_urbg") {
+  public = [ "pool_urbg.h" ]
+  sources = [ "pool_urbg.cc" ]
+  deps = [
+    ":randen",
+    ":seed_material",
+    ":traits",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/random:seed_gen_exception",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("explicit_seed_seq") {
+  testonly = true
+  public = [ "explicit_seed_seq.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:endian",
+  ]
+}
+
+absl_source_set("sequence_urbg") {
+  testonly = true
+  public = [ "sequence_urbg.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("salted_seed_seq") {
+  public = [ "salted_seed_seq.h" ]
+  deps = [
+    ":seed_material",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("iostream_state_saver") {
+  public = [ "iostream_state_saver.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+absl_source_set("generate_real") {
+  public = [ "generate_real.h" ]
+  deps = [
+    ":fastmath",
+    ":traits",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+  ]
+}
+
+absl_source_set("fastmath") {
+  public = [ "fastmath.h" ]
+  deps = [ "//third_party/abseil-cpp/absl/numeric:bits" ]
+}
+
+absl_source_set("wide_multiply") {
+  public = [ "wide_multiply.h" ]
+  deps = [
+    ":traits",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+absl_source_set("nonsecure_base") {
+  public = [ "nonsecure_base.h" ]
+  deps = [
+    ":pool_urbg",
+    ":salted_seed_seq",
+    ":seed_material",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("pcg_engine") {
+  public = [ "pcg_engine.h" ]
+  deps = [
+    ":fastmath",
+    ":iostream_state_saver",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+absl_source_set("randen_engine") {
+  public = [ "randen_engine.h" ]
+  deps = [
+    ":iostream_state_saver",
+    ":randen",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("platform") {
+  public = [
+    "platform.h",
+    "randen_traits.h",
+  ]
+  sources = [ "randen_round_keys.cc" ]
+  deps = [
+    "//build:chromeos_buildflags",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("randen") {
+  public = [ "randen.h" ]
+  sources = [ "randen.cc" ]
+  deps = [
+    ":platform",
+    ":randen_hwaes",
+    ":randen_slow",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("randen_slow") {
+  public = [ "randen_slow.h" ]
+  sources = [ "randen_slow.cc" ]
+  deps = [
+    ":platform",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+absl_source_set("randen_hwaes") {
+  public = [
+    "randen_detect.h",
+    "randen_hwaes.h",
+  ]
+  sources = [ "randen_detect.cc" ]
+  deps = [
+    ":platform",
+    ":randen_hwaes_impl",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("randen_hwaes_impl") {
+  sources = [
+    "randen_hwaes.cc",
+    "randen_hwaes.h",
+  ]
+  deps = [
+    ":platform",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+executable("gaussian_distribution_gentables") {
+  sources = [ "gaussian_distribution_gentables.cc" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/random:distributions",
+  ]
+}
+
+absl_source_set("distribution_test_util") {
+  testonly = true
+  public = [
+    "chi_square.h",
+    "distribution_test_util.h",
+  ]
+  sources = [
+    "chi_square.cc",
+    "distribution_test_util.cc",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+# TODO(danilchap): Enable when can be compiled on all chromium bots.
+# nanobenchmark uses platform specific functions to take accurate current time,
+# and fallbacks to clock_gettime. Several chromium configurations lack both
+# dedicated code and the clock_gettime system function.
+# absl_source_set("nanobenchmark") {
+#  sources = [ "nanobenchmark.cc" ]
+#  deps = [
+#    ":platform",
+#    ":randen_engine",
+#    "//third_party/abseil-cpp/absl/base:config",
+#    "//third_party/abseil-cpp/absl/base:core_headers",
+#    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+#  ]
+# }
+
+absl_source_set("uniform_helper") {
+  public = [ "uniform_helper.h" ]
+  deps = [
+    ":traits",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/random/internal/chi_square.cc b/third_party/abseil-cpp/absl/random/internal/chi_square.cc
index 640d48cea6..fbe0173299 100644
--- a/third_party/abseil-cpp/absl/random/internal/chi_square.cc
+++ b/third_party/abseil-cpp/absl/random/internal/chi_square.cc
@@ -125,7 +125,8 @@ double ChiSquareValue(int dof, double p) {
     const double variance = 2.0 / (9 * dof);
     // Cannot use this method if the variance is 0.
     if (variance != 0) {
-      return std::pow(z * std::sqrt(variance) + mean, 3.0) * dof;
+      double term = z * std::sqrt(variance) + mean;
+      return dof * (term * term * term);
     }
   }
 
diff --git a/third_party/abseil-cpp/absl/random/internal/distribution_caller.h b/third_party/abseil-cpp/absl/random/internal/distribution_caller.h
index fc81b787eb..0f162a4e29 100644
--- a/third_party/abseil-cpp/absl/random/internal/distribution_caller.h
+++ b/third_party/abseil-cpp/absl/random/internal/distribution_caller.h
@@ -18,6 +18,7 @@
 #define ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_
 
 #include <utility>
+#include <type_traits>
 
 #include "absl/base/config.h"
 #include "absl/base/internal/fast_type_id.h"
@@ -32,6 +33,8 @@ namespace random_internal {
 // to intercept such calls.
 template <typename URBG>
 struct DistributionCaller {
+  static_assert(!std::is_pointer<URBG>::value,
+                "You must pass a reference, not a pointer.");
   // SFINAE to detect whether the URBG type includes a member matching
   // bool InvokeMock(base_internal::FastTypeIdType, void*, void*).
   //
diff --git a/third_party/abseil-cpp/absl/random/internal/explicit_seed_seq_test.cc b/third_party/abseil-cpp/absl/random/internal/explicit_seed_seq_test.cc
index f867f610d0..e36d5fa028 100644
--- a/third_party/abseil-cpp/absl/random/internal/explicit_seed_seq_test.cc
+++ b/third_party/abseil-cpp/absl/random/internal/explicit_seed_seq_test.cc
@@ -140,10 +140,8 @@ TEST(ExplicitSeedSeq, CopyAndMoveConstructors) {
     ExplicitSeedSeq seq_copy(seq_from_entropy);
     EXPECT_EQ(seq_copy.size(), seq_from_entropy.size());
 
-    std::vector<uint32_t> seeds_1;
-    seeds_1.resize(1000, 0);
-    std::vector<uint32_t> seeds_2;
-    seeds_2.resize(1000, 1);
+    std::vector<uint32_t> seeds_1(1000, 0);
+    std::vector<uint32_t> seeds_2(1000, 1);
 
     seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
     seq_copy.generate(seeds_2.begin(), seeds_2.end());
@@ -157,10 +155,8 @@ TEST(ExplicitSeedSeq, CopyAndMoveConstructors) {
     }
     ExplicitSeedSeq another_seq(std::begin(entropy), std::end(entropy));
 
-    std::vector<uint32_t> seeds_1;
-    seeds_1.resize(1000, 0);
-    std::vector<uint32_t> seeds_2;
-    seeds_2.resize(1000, 0);
+    std::vector<uint32_t> seeds_1(1000, 0);
+    std::vector<uint32_t> seeds_2(1000, 0);
 
     seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
     another_seq.generate(seeds_2.begin(), seeds_2.end());
@@ -169,7 +165,15 @@ TEST(ExplicitSeedSeq, CopyAndMoveConstructors) {
     EXPECT_THAT(seeds_1, Not(Pointwise(Eq(), seeds_2)));
 
     // Apply the assignment-operator.
+    // GCC 12 has a false-positive -Wstringop-overflow warning here.
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#endif
     another_seq = seq_from_entropy;
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic pop
+#endif
 
     // Re-generate seeds.
     seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
@@ -181,15 +185,13 @@ TEST(ExplicitSeedSeq, CopyAndMoveConstructors) {
   // Move constructor.
   {
     // Get seeds from seed-sequence constructed from entropy.
-    std::vector<uint32_t> seeds_1;
-    seeds_1.resize(1000, 0);
+    std::vector<uint32_t> seeds_1(1000, 0);
     seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
 
     // Apply move-constructor move the sequence to another instance.
     absl::random_internal::ExplicitSeedSeq moved_seq(
         std::move(seq_from_entropy));
-    std::vector<uint32_t> seeds_2;
-    seeds_2.resize(1000, 1);
+    std::vector<uint32_t> seeds_2(1000, 1);
     moved_seq.generate(seeds_2.begin(), seeds_2.end());
     // Verify that seeds produced by moved-instance are the same as original.
     EXPECT_THAT(seeds_1, Pointwise(Eq(), seeds_2));
diff --git a/third_party/abseil-cpp/absl/random/internal/fast_uniform_bits.h b/third_party/abseil-cpp/absl/random/internal/fast_uniform_bits.h
index 425aaf7d83..8d8ed04515 100644
--- a/third_party/abseil-cpp/absl/random/internal/fast_uniform_bits.h
+++ b/third_party/abseil-cpp/absl/random/internal/fast_uniform_bits.h
@@ -22,6 +22,7 @@
 
 #include "absl/base/config.h"
 #include "absl/meta/type_traits.h"
+#include "absl/random/internal/traits.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -98,7 +99,7 @@ class FastUniformBits {
   result_type operator()(URBG& g);  // NOLINT(runtime/references)
 
  private:
-  static_assert(std::is_unsigned<UIntType>::value,
+  static_assert(IsUnsigned<UIntType>::value,
                 "Class-template FastUniformBits<> must be parameterized using "
                 "an unsigned type.");
 
@@ -150,7 +151,8 @@ FastUniformBits<UIntType>::Generate(URBG& g,  // NOLINT(runtime/references)
 
   result_type r = static_cast<result_type>(g() - kMin);
   for (size_t n = 1; n < kIters; ++n) {
-    r = (r << kShift) + static_cast<result_type>(g() - kMin);
+    r = static_cast<result_type>(r << kShift) +
+        static_cast<result_type>(g() - kMin);
   }
   return r;
 }
diff --git a/third_party/abseil-cpp/absl/random/internal/generate_real.h b/third_party/abseil-cpp/absl/random/internal/generate_real.h
index d5fbb44c24..b569450cf7 100644
--- a/third_party/abseil-cpp/absl/random/internal/generate_real.h
+++ b/third_party/abseil-cpp/absl/random/internal/generate_real.h
@@ -50,10 +50,10 @@ struct GenerateSignedTag {};
 // inputs, otherwise it never returns 0.
 //
 // When a value in U(0,1) is required, use:
-//   Uniform64ToReal<double, PositiveValueT, true>;
+//   GenerateRealFromBits<double, PositiveValueT, true>;
 //
 // When a value in U(-1,1) is required, use:
-//   Uniform64ToReal<double, SignedValueT, false>;
+//   GenerateRealFromBits<double, SignedValueT, false>;
 //
 //   This generates more distinct values than the mathematical equivalent
 //   `U(0, 1) * 2.0 - 1.0`.
diff --git a/third_party/abseil-cpp/absl/random/internal/mock_helpers.h b/third_party/abseil-cpp/absl/random/internal/mock_helpers.h
index 9d6ab21ef5..882b0518ca 100644
--- a/third_party/abseil-cpp/absl/random/internal/mock_helpers.h
+++ b/third_party/abseil-cpp/absl/random/internal/mock_helpers.h
@@ -18,6 +18,7 @@
 
 #include <tuple>
 #include <type_traits>
+#include <utility>
 
 #include "absl/base/internal/fast_type_id.h"
 #include "absl/types/optional.h"
diff --git a/third_party/abseil-cpp/absl/random/internal/nonsecure_base.h b/third_party/abseil-cpp/absl/random/internal/nonsecure_base.h
index 730fa2ea12..c3b80335ae 100644
--- a/third_party/abseil-cpp/absl/random/internal/nonsecure_base.h
+++ b/third_party/abseil-cpp/absl/random/internal/nonsecure_base.h
@@ -17,28 +17,82 @@
 
 #include <algorithm>
 #include <cstdint>
-#include <iostream>
 #include <iterator>
-#include <random>
-#include <string>
 #include <type_traits>
+#include <utility>
 #include <vector>
 
 #include "absl/base/macros.h"
+#include "absl/container/inlined_vector.h"
 #include "absl/meta/type_traits.h"
 #include "absl/random/internal/pool_urbg.h"
 #include "absl/random/internal/salted_seed_seq.h"
 #include "absl/random/internal/seed_material.h"
-#include "absl/types/optional.h"
 #include "absl/types/span.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace random_internal {
 
+// RandenPoolSeedSeq is a custom seed sequence type where generate() fills the
+// provided buffer via the RandenPool entropy source.
+class RandenPoolSeedSeq {
+ private:
+  struct ContiguousTag {};
+  struct BufferTag {};
+
+  // Generate random unsigned values directly into the buffer.
+  template <typename Contiguous>
+  void generate_impl(ContiguousTag, Contiguous begin, Contiguous end) {
+    const size_t n = static_cast<size_t>(std::distance(begin, end));
+    auto* a = &(*begin);
+    RandenPool<uint8_t>::Fill(
+        absl::MakeSpan(reinterpret_cast<uint8_t*>(a), sizeof(*a) * n));
+  }
+
+  // Construct a buffer of size n and fill it with values, then copy
+  // those values into the seed iterators.
+  template <typename RandomAccessIterator>
+  void generate_impl(BufferTag, RandomAccessIterator begin,
+                     RandomAccessIterator end) {
+    const size_t n = std::distance(begin, end);
+    absl::InlinedVector<uint32_t, 8> data(n, 0);
+    RandenPool<uint32_t>::Fill(absl::MakeSpan(data.begin(), data.end()));
+    std::copy(std::begin(data), std::end(data), begin);
+  }
+
+ public:
+  using result_type = uint32_t;
+
+  size_t size() { return 0; }
+
+  template <typename OutIterator>
+  void param(OutIterator) const {}
+
+  template <typename RandomAccessIterator>
+  void generate(RandomAccessIterator begin, RandomAccessIterator end) {
+    // RandomAccessIterator must be assignable from uint32_t
+    if (begin != end) {
+      using U = typename std::iterator_traits<RandomAccessIterator>::value_type;
+      // ContiguousTag indicates the common case of a known contiguous buffer,
+      // which allows directly filling the buffer. In C++20,
+      // std::contiguous_iterator_tag provides a mechanism for testing this
+      // capability, however until Abseil's support requirements allow us to
+      // assume C++20, limit checks to a few common cases.
+      using TagType = absl::conditional_t<
+          (std::is_pointer<RandomAccessIterator>::value ||
+           std::is_same<RandomAccessIterator,
+                        typename std::vector<U>::iterator>::value),
+          ContiguousTag, BufferTag>;
+
+      generate_impl(TagType{}, begin, end);
+    }
+  }
+};
+
 // Each instance of NonsecureURBGBase<URBG> will be seeded by variates produced
 // by a thread-unique URBG-instance.
-template <typename URBG>
+template <typename URBG, typename Seeder = RandenPoolSeedSeq>
 class NonsecureURBGBase {
  public:
   using result_type = typename URBG::result_type;
@@ -85,49 +139,6 @@ class NonsecureURBGBase {
   }
 
  private:
-  // Seeder is a custom seed sequence type where generate() fills the provided
-  // buffer via the RandenPool entropy source.
-  struct Seeder {
-    using result_type = uint32_t;
-
-    size_t size() { return 0; }
-
-    template <typename OutIterator>
-    void param(OutIterator) const {}
-
-    template <typename RandomAccessIterator>
-    void generate(RandomAccessIterator begin, RandomAccessIterator end) {
-      if (begin != end) {
-        // begin, end must be random access iterators assignable from uint32_t.
-        generate_impl(
-            std::integral_constant<bool, sizeof(*begin) == sizeof(uint32_t)>{},
-            begin, end);
-      }
-    }
-
-    // Commonly, generate is invoked with a pointer to a buffer which
-    // can be cast to a uint32_t.
-    template <typename RandomAccessIterator>
-    void generate_impl(std::integral_constant<bool, true>,
-                       RandomAccessIterator begin, RandomAccessIterator end) {
-      auto buffer = absl::MakeSpan(begin, end);
-      auto target = absl::MakeSpan(reinterpret_cast<uint32_t*>(buffer.data()),
-                                   buffer.size());
-      RandenPool<uint32_t>::Fill(target);
-    }
-
-    // The non-uint32_t case should be uncommon, and involves an extra copy,
-    // filling the uint32_t buffer and then mixing into the output.
-    template <typename RandomAccessIterator>
-    void generate_impl(std::integral_constant<bool, false>,
-                       RandomAccessIterator begin, RandomAccessIterator end) {
-      const size_t n = std::distance(begin, end);
-      absl::InlinedVector<uint32_t, 8> data(n, 0);
-      RandenPool<uint32_t>::Fill(absl::MakeSpan(data.begin(), data.end()));
-      std::copy(std::begin(data), std::end(data), begin);
-    }
-  };
-
   static URBG ConstructURBG() {
     Seeder seeder;
     return URBG(seeder);
diff --git a/third_party/abseil-cpp/absl/random/internal/nonsecure_base_test.cc b/third_party/abseil-cpp/absl/random/internal/nonsecure_base_test.cc
index 698027fc6e..3502243e15 100644
--- a/third_party/abseil-cpp/absl/random/internal/nonsecure_base_test.cc
+++ b/third_party/abseil-cpp/absl/random/internal/nonsecure_base_test.cc
@@ -15,6 +15,7 @@
 #include "absl/random/internal/nonsecure_base.h"
 
 #include <algorithm>
+#include <cstdint>
 #include <iostream>
 #include <memory>
 #include <random>
@@ -192,54 +193,35 @@ TEST(NonsecureURBGBase, EqualSeedSequencesYieldEqualVariates) {
   }
 }
 
-// This is a PRNG-compatible type specifically designed to test
-// that NonsecureURBGBase::Seeder can correctly handle iterators
-// to arbitrary non-uint32_t size types.
-template <typename T>
-struct SeederTestEngine {
-  using result_type = T;
+TEST(RandenPoolSeedSeqTest, SeederWorksForU32) {
+  absl::random_internal::RandenPoolSeedSeq seeder;
 
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  template <class SeedSequence,
-            typename = typename absl::enable_if_t<
-                !std::is_same<SeedSequence, SeederTestEngine>::value>>
-  explicit SeederTestEngine(SeedSequence&& seq) {
-    seed(seq);
-  }
-
-  SeederTestEngine(const SeederTestEngine&) = default;
-  SeederTestEngine& operator=(const SeederTestEngine&) = default;
-  SeederTestEngine(SeederTestEngine&&) = default;
-  SeederTestEngine& operator=(SeederTestEngine&&) = default;
+  uint32_t state[2] = {0, 0};
+  seeder.generate(std::begin(state), std::end(state));
+  EXPECT_FALSE(state[0] == 0 && state[1] == 0);
+}
 
-  result_type operator()() { return state[0]; }
+TEST(RandenPoolSeedSeqTest, SeederWorksForU64) {
+  absl::random_internal::RandenPoolSeedSeq seeder;
 
-  template <class SeedSequence>
-  void seed(SeedSequence&& seq) {
-    std::fill(std::begin(state), std::end(state), T(0));
-    seq.generate(std::begin(state), std::end(state));
-  }
+  uint64_t state[2] = {0, 0};
+  seeder.generate(std::begin(state), std::end(state));
+  EXPECT_FALSE(state[0] == 0 && state[1] == 0);
+  EXPECT_FALSE((state[0] >> 32) == 0 && (state[1] >> 32) == 0);
+}
 
-  T state[2];
-};
+TEST(RandenPoolSeedSeqTest, SeederWorksForS32) {
+  absl::random_internal::RandenPoolSeedSeq seeder;
 
-TEST(NonsecureURBGBase, SeederWorksForU32) {
-  using U32 =
-      absl::random_internal::NonsecureURBGBase<SeederTestEngine<uint32_t>>;
-  U32 x;
-  EXPECT_NE(0, x());
+  int32_t state[2] = {0, 0};
+  seeder.generate(std::begin(state), std::end(state));
+  EXPECT_FALSE(state[0] == 0 && state[1] == 0);
 }
 
-TEST(NonsecureURBGBase, SeederWorksForU64) {
-  using U64 =
-      absl::random_internal::NonsecureURBGBase<SeederTestEngine<uint64_t>>;
+TEST(RandenPoolSeedSeqTest, SeederWorksForVector) {
+  absl::random_internal::RandenPoolSeedSeq seeder;
 
-  U64 x;
-  EXPECT_NE(0, x());
+  std::vector<uint32_t> state(2);
+  seeder.generate(std::begin(state), std::end(state));
+  EXPECT_FALSE(state[0] == 0 && state[1] == 0);
 }
diff --git a/third_party/abseil-cpp/absl/random/internal/pcg_engine.h b/third_party/abseil-cpp/absl/random/internal/pcg_engine.h
index 8efaf2e09a..e1f4ef3317 100644
--- a/third_party/abseil-cpp/absl/random/internal/pcg_engine.h
+++ b/third_party/abseil-cpp/absl/random/internal/pcg_engine.h
@@ -221,48 +221,27 @@ class pcg_engine {
 template <uint64_t kMultA, uint64_t kMultB, uint64_t kIncA, uint64_t kIncB>
 class pcg128_params {
  public:
-#if ABSL_HAVE_INTRINSIC_INT128
-  using state_type = __uint128_t;
-  static inline constexpr state_type make_u128(uint64_t a, uint64_t b) {
-    return (static_cast<__uint128_t>(a) << 64) | b;
-  }
-#else
   using state_type = absl::uint128;
-  static inline constexpr state_type make_u128(uint64_t a, uint64_t b) {
-    return absl::MakeUint128(a, b);
-  }
-#endif
-
   static inline constexpr state_type multiplier() {
-    return make_u128(kMultA, kMultB);
+    return absl::MakeUint128(kMultA, kMultB);
   }
   static inline constexpr state_type increment() {
-    return make_u128(kIncA, kIncB);
+    return absl::MakeUint128(kIncA, kIncB);
   }
 };
 
 // Implementation of the PCG xsl_rr_128_64 128-bit mixing function, which
 // accepts an input of state_type and mixes it into an output of result_type.
 struct pcg_xsl_rr_128_64 {
-#if ABSL_HAVE_INTRINSIC_INT128
-  using state_type = __uint128_t;
-#else
   using state_type = absl::uint128;
-#endif
   using result_type = uint64_t;
 
   inline uint64_t operator()(state_type state) {
     // This is equivalent to the xsl_rr_128_64 mixing function.
-#if ABSL_HAVE_INTRINSIC_INT128
     uint64_t rotate = static_cast<uint64_t>(state >> 122u);
     state ^= state >> 64;
     uint64_t s = static_cast<uint64_t>(state);
-#else
-    uint64_t h = Uint128High64(state);
-    uint64_t rotate = h >> 58u;
-    uint64_t s = Uint128Low64(state) ^ h;
-#endif
-    return rotr(s, rotate);
+    return rotr(s, static_cast<int>(rotate));
   }
 };
 
diff --git a/third_party/abseil-cpp/absl/random/internal/pool_urbg.cc b/third_party/abseil-cpp/absl/random/internal/pool_urbg.cc
index 725100a415..5aefa7d97b 100644
--- a/third_party/abseil-cpp/absl/random/internal/pool_urbg.cc
+++ b/third_party/abseil-cpp/absl/random/internal/pool_urbg.cc
@@ -131,7 +131,7 @@ void RandenPoolEntry::Fill(uint8_t* out, size_t bytes) {
 }
 
 // Number of pooled urbg entries.
-static constexpr int kPoolSize = 8;
+static constexpr size_t kPoolSize = 8;
 
 // Shared pool entries.
 static absl::once_flag pool_once;
@@ -147,15 +147,15 @@ ABSL_CACHELINE_ALIGNED static RandenPoolEntry* shared_pools[kPoolSize];
 // on subsequent runs the order within the same program may be significantly
 // different. However, as other thread IDs are not assigned sequentially,
 // this is not expected to matter.
-int GetPoolID() {
+size_t GetPoolID() {
   static_assert(kPoolSize >= 1,
                 "At least one urbg instance is required for PoolURBG");
 
-  ABSL_CONST_INIT static std::atomic<int64_t> sequence{0};
+  ABSL_CONST_INIT static std::atomic<uint64_t> sequence{0};
 
 #ifdef ABSL_HAVE_THREAD_LOCAL
-  static thread_local int my_pool_id = -1;
-  if (ABSL_PREDICT_FALSE(my_pool_id < 0)) {
+  static thread_local size_t my_pool_id = kPoolSize;
+  if (ABSL_PREDICT_FALSE(my_pool_id == kPoolSize)) {
     my_pool_id = (sequence++ % kPoolSize);
   }
   return my_pool_id;
@@ -171,8 +171,8 @@ int GetPoolID() {
 
   // Store the value in the pthread_{get/set}specific. However an uninitialized
   // value is 0, so add +1 to distinguish from the null value.
-  intptr_t my_pool_id =
-      reinterpret_cast<intptr_t>(pthread_getspecific(tid_key));
+  uintptr_t my_pool_id =
+      reinterpret_cast<uintptr_t>(pthread_getspecific(tid_key));
   if (ABSL_PREDICT_FALSE(my_pool_id == 0)) {
     // No allocated ID, allocate the next value, cache it, and return.
     my_pool_id = (sequence++ % kPoolSize) + 1;
@@ -194,7 +194,7 @@ RandenPoolEntry* PoolAlignedAlloc() {
   // Not all the platforms that we build for have std::aligned_alloc, however
   // since we never free these objects, we can over allocate and munge the
   // pointers to the correct alignment.
-  intptr_t x = reinterpret_cast<intptr_t>(
+  uintptr_t x = reinterpret_cast<uintptr_t>(
       new char[sizeof(RandenPoolEntry) + kAlignment]);
   auto y = x % kAlignment;
   void* aligned = reinterpret_cast<void*>(y == 0 ? x : (x + kAlignment - y));
@@ -215,7 +215,7 @@ void InitPoolURBG() {
           absl::MakeSpan(seed_material))) {
     random_internal::ThrowSeedGenException();
   }
-  for (int i = 0; i < kPoolSize; i++) {
+  for (size_t i = 0; i < kPoolSize; i++) {
     shared_pools[i] = PoolAlignedAlloc();
     shared_pools[i]->Init(
         absl::MakeSpan(&seed_material[i * kSeedSize], kSeedSize));
diff --git a/third_party/abseil-cpp/absl/random/internal/randen.h b/third_party/abseil-cpp/absl/random/internal/randen.h
index 9a3840b8f1..9ff4a7a554 100644
--- a/third_party/abseil-cpp/absl/random/internal/randen.h
+++ b/third_party/abseil-cpp/absl/random/internal/randen.h
@@ -43,10 +43,8 @@ class Randen {
 
   // Generate updates the randen sponge. The outer portion of the sponge
   // (kCapacityBytes .. kStateBytes) may be consumed as PRNG state.
-  template <typename T, size_t N>
-  void Generate(T (&state)[N]) const {
-    static_assert(N * sizeof(T) == kStateBytes,
-                  "Randen::Generate() requires kStateBytes of state");
+  // REQUIRES: state points to kStateBytes of state.
+  inline void Generate(void* state) const {
 #if ABSL_RANDOM_INTERNAL_AES_DISPATCH
     // HW AES Dispatch.
     if (has_crypto_) {
@@ -65,13 +63,9 @@ class Randen {
 
   // Absorb incorporates additional seed material into the randen sponge.  After
   // absorb returns, Generate must be called before the state may be consumed.
-  template <typename S, size_t M, typename T, size_t N>
-  void Absorb(const S (&seed)[M], T (&state)[N]) const {
-    static_assert(M * sizeof(S) == RandenTraits::kSeedBytes,
-                  "Randen::Absorb() requires kSeedBytes of seed");
-
-    static_assert(N * sizeof(T) == RandenTraits::kStateBytes,
-                  "Randen::Absorb() requires kStateBytes of state");
+  // REQUIRES: seed points to kSeedBytes of seed.
+  // REQUIRES: state points to kStateBytes of state.
+  inline void Absorb(const void* seed, void* state) const {
 #if ABSL_RANDOM_INTERNAL_AES_DISPATCH
     // HW AES Dispatch.
     if (has_crypto_) {
diff --git a/third_party/abseil-cpp/absl/random/internal/randen_detect.cc b/third_party/abseil-cpp/absl/random/internal/randen_detect.cc
index bbe7b96532..6dababa351 100644
--- a/third_party/abseil-cpp/absl/random/internal/randen_detect.cc
+++ b/third_party/abseil-cpp/absl/random/internal/randen_detect.cc
@@ -24,6 +24,11 @@
 
 #include "absl/random/internal/platform.h"
 
+#if !defined(__UCLIBC__) && defined(__GLIBC__) && \
+    (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 16))
+#define ABSL_HAVE_GETAUXVAL
+#endif
+
 #if defined(ABSL_ARCH_X86_64)
 #define ABSL_INTERNAL_USE_X86_CPUID
 #elif defined(ABSL_ARCH_PPC) || defined(ABSL_ARCH_ARM) || \
@@ -31,7 +36,7 @@
 #if defined(__ANDROID__)
 #define ABSL_INTERNAL_USE_ANDROID_GETAUXVAL
 #define ABSL_INTERNAL_USE_GETAUXVAL
-#elif defined(__linux__)
+#elif defined(__linux__) && defined(ABSL_HAVE_GETAUXVAL)
 #define ABSL_INTERNAL_USE_LINUX_GETAUXVAL
 #define ABSL_INTERNAL_USE_GETAUXVAL
 #endif
@@ -40,7 +45,6 @@
 #if defined(ABSL_INTERNAL_USE_X86_CPUID)
 #if defined(_WIN32) || defined(_WIN64)
 #include <intrin.h>  // NOLINT(build/include_order)
-#pragma intrinsic(__cpuid)
 #else
 // MSVC-equivalent __cpuid intrinsic function.
 static void __cpuid(int cpu_info[4], int info_type) {
diff --git a/third_party/abseil-cpp/absl/random/internal/randen_engine.h b/third_party/abseil-cpp/absl/random/internal/randen_engine.h
index 372c3ac2bd..b47086649e 100644
--- a/third_party/abseil-cpp/absl/random/internal/randen_engine.h
+++ b/third_party/abseil-cpp/absl/random/internal/randen_engine.h
@@ -42,7 +42,7 @@ namespace random_internal {
 // 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
 // generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
 template <typename T>
-class alignas(16) randen_engine {
+class alignas(8) randen_engine {
  public:
   // C++11 URBG interface:
   using result_type = T;
@@ -58,7 +58,8 @@ class alignas(16) randen_engine {
     return (std::numeric_limits<result_type>::max)();
   }
 
-  explicit randen_engine(result_type seed_value = 0) { seed(seed_value); }
+  randen_engine() : randen_engine(0) {}
+  explicit randen_engine(result_type seed_value) { seed(seed_value); }
 
   template <class SeedSequence,
             typename = typename absl::enable_if_t<
@@ -67,17 +68,27 @@ class alignas(16) randen_engine {
     seed(seq);
   }
 
-  randen_engine(const randen_engine&) = default;
+  // alignment requirements dictate custom copy and move constructors.
+  randen_engine(const randen_engine& other)
+      : next_(other.next_), impl_(other.impl_) {
+    std::memcpy(state(), other.state(), kStateSizeT * sizeof(result_type));
+  }
+  randen_engine& operator=(const randen_engine& other) {
+    next_ = other.next_;
+    impl_ = other.impl_;
+    std::memcpy(state(), other.state(), kStateSizeT * sizeof(result_type));
+    return *this;
+  }
 
   // Returns random bits from the buffer in units of result_type.
   result_type operator()() {
     // Refill the buffer if needed (unlikely).
+    auto* begin = state();
     if (next_ >= kStateSizeT) {
       next_ = kCapacityT;
-      impl_.Generate(state_);
+      impl_.Generate(begin);
     }
-
-    return little_endian::ToHost(state_[next_++]);
+    return little_endian::ToHost(begin[next_++]);
   }
 
   template <class SeedSequence>
@@ -92,9 +103,10 @@ class alignas(16) randen_engine {
   void seed(result_type seed_value = 0) {
     next_ = kStateSizeT;
     // Zeroes the inner state and fills the outer state with seed_value to
-    // mimics behaviour of reseed
-    std::fill(std::begin(state_), std::begin(state_) + kCapacityT, 0);
-    std::fill(std::begin(state_) + kCapacityT, std::end(state_), seed_value);
+    // mimic the behaviour of reseed
+    auto* begin = state();
+    std::fill(begin, begin + kCapacityT, 0);
+    std::fill(begin + kCapacityT, begin + kStateSizeT, seed_value);
   }
 
   // Inserts entropy into (part of) the state. Calling this periodically with
@@ -105,7 +117,6 @@ class alignas(16) randen_engine {
     using sequence_result_type = typename SeedSequence::result_type;
     static_assert(sizeof(sequence_result_type) == 4,
                   "SeedSequence::result_type must be 32-bit");
-
     constexpr size_t kBufferSize =
         Randen::kSeedBytes / sizeof(sequence_result_type);
     alignas(16) sequence_result_type buffer[kBufferSize];
@@ -119,8 +130,8 @@ class alignas(16) randen_engine {
     if (entropy_size < kBufferSize) {
       // ... and only request that many values, or 256-bits, when unspecified.
       const size_t requested_entropy = (entropy_size == 0) ? 8u : entropy_size;
-      std::fill(std::begin(buffer) + requested_entropy, std::end(buffer), 0);
-      seq.generate(std::begin(buffer), std::begin(buffer) + requested_entropy);
+      std::fill(buffer + requested_entropy, buffer + kBufferSize, 0);
+      seq.generate(buffer, buffer + requested_entropy);
 #ifdef ABSL_IS_BIG_ENDIAN
       // Randen expects the seed buffer to be in Little Endian; reverse it on
       // Big Endian platforms.
@@ -146,9 +157,9 @@ class alignas(16) randen_engine {
         std::swap(buffer[--dst], buffer[--src]);
       }
     } else {
-      seq.generate(std::begin(buffer), std::end(buffer));
+      seq.generate(buffer, buffer + kBufferSize);
     }
-    impl_.Absorb(buffer, state_);
+    impl_.Absorb(buffer, state());
 
     // Generate will be called when operator() is called
     next_ = kStateSizeT;
@@ -159,9 +170,10 @@ class alignas(16) randen_engine {
     count -= step;
 
     constexpr uint64_t kRateT = kStateSizeT - kCapacityT;
+    auto* begin = state();
     while (count > 0) {
       next_ = kCapacityT;
-      impl_.Generate(state_);
+      impl_.Generate(*reinterpret_cast<result_type(*)[kStateSizeT]>(begin));
       step = std::min<uint64_t>(kRateT, count);
       count -= step;
     }
@@ -169,9 +181,9 @@ class alignas(16) randen_engine {
   }
 
   bool operator==(const randen_engine& other) const {
+    const auto* begin = state();
     return next_ == other.next_ &&
-           std::equal(std::begin(state_), std::end(state_),
-                      std::begin(other.state_));
+           std::equal(begin, begin + kStateSizeT, other.state());
   }
 
   bool operator!=(const randen_engine& other) const {
@@ -185,11 +197,12 @@ class alignas(16) randen_engine {
     using numeric_type =
         typename random_internal::stream_format_type<result_type>::type;
     auto saver = random_internal::make_ostream_state_saver(os);
-    for (const auto& elem : engine.state_) {
+    auto* it = engine.state();
+    for (auto* end = it + kStateSizeT; it < end; ++it) {
       // In the case that `elem` is `uint8_t`, it must be cast to something
       // larger so that it prints as an integer rather than a character. For
       // simplicity, apply the cast all circumstances.
-      os << static_cast<numeric_type>(little_endian::FromHost(elem))
+      os << static_cast<numeric_type>(little_endian::FromHost(*it))
          << os.fill();
     }
     os << engine.next_;
@@ -215,7 +228,7 @@ class alignas(16) randen_engine {
     if (is.fail()) {
       return is;
     }
-    std::memcpy(engine.state_, state, sizeof(engine.state_));
+    std::memcpy(engine.state(), state, sizeof(state));
     engine.next_ = next;
     return is;
   }
@@ -226,9 +239,21 @@ class alignas(16) randen_engine {
   static constexpr size_t kCapacityT =
       Randen::kCapacityBytes / sizeof(result_type);
 
-  // First kCapacityT are `inner', the others are accessible random bits.
-  alignas(16) result_type state_[kStateSizeT];
-  size_t next_;  // index within state_
+  // Returns the state array pointer, which is aligned to 16 bytes.
+  // The first kCapacityT are the `inner' sponge; the remainder are available.
+  result_type* state() {
+    return reinterpret_cast<result_type*>(
+        (reinterpret_cast<uintptr_t>(&raw_state_) & 0xf) ? (raw_state_ + 8)
+                                                         : raw_state_);
+  }
+  const result_type* state() const {
+    return const_cast<randen_engine*>(this)->state();
+  }
+
+  // raw state array, manually aligned in state(). This overallocates
+  // by 8 bytes since C++ does not guarantee extended heap alignment.
+  alignas(8) char raw_state_[Randen::kStateBytes + 8];
+  size_t next_;  // index within state()
   Randen impl_;
 };
 
diff --git a/third_party/abseil-cpp/absl/random/internal/salted_seed_seq.h b/third_party/abseil-cpp/absl/random/internal/salted_seed_seq.h
index 5953a090f8..06291865e3 100644
--- a/third_party/abseil-cpp/absl/random/internal/salted_seed_seq.h
+++ b/third_party/abseil-cpp/absl/random/internal/salted_seed_seq.h
@@ -22,6 +22,7 @@
 #include <memory>
 #include <type_traits>
 #include <utility>
+#include <vector>
 
 #include "absl/container/inlined_vector.h"
 #include "absl/meta/type_traits.h"
@@ -65,15 +66,19 @@ class SaltedSeedSeq {
 
   template <typename RandomAccessIterator>
   void generate(RandomAccessIterator begin, RandomAccessIterator end) {
+    using U = typename std::iterator_traits<RandomAccessIterator>::value_type;
+
     // The common case is that generate is called with ContiguousIterators
     // to uint arrays. Such contiguous memory regions may be optimized,
     // which we detect here.
-    using tag = absl::conditional_t<
-        (std::is_pointer<RandomAccessIterator>::value &&
-         std::is_same<absl::decay_t<decltype(*begin)>, uint32_t>::value),
+    using TagType = absl::conditional_t<
+        (std::is_same<U, uint32_t>::value &&
+         (std::is_pointer<RandomAccessIterator>::value ||
+          std::is_same<RandomAccessIterator,
+                       typename std::vector<U>::iterator>::value)),
         ContiguousAndUint32Tag, DefaultTag>;
     if (begin != end) {
-      generate_impl(begin, end, tag{});
+      generate_impl(TagType{}, begin, end, std::distance(begin, end));
     }
   }
 
@@ -89,8 +94,15 @@ class SaltedSeedSeq {
   struct DefaultTag {};
 
   // Generate which requires the iterators are contiguous pointers to uint32_t.
-  void generate_impl(uint32_t* begin, uint32_t* end, ContiguousAndUint32Tag) {
-    generate_contiguous(absl::MakeSpan(begin, end));
+  // Fills the initial seed buffer the underlying SSeq::generate() call,
+  // then mixes in the salt material.
+  template <typename Contiguous>
+  void generate_impl(ContiguousAndUint32Tag, Contiguous begin, Contiguous end,
+                     size_t n) {
+    seq_->generate(begin, end);
+    const uint32_t salt = absl::random_internal::GetSaltMaterial().value_or(0);
+    auto span = absl::Span<uint32_t>(&*begin, n);
+    MixIntoSeedMaterial(absl::MakeConstSpan(&salt, 1), span);
   }
 
   // The uncommon case for generate is that it is called with iterators over
@@ -98,27 +110,13 @@ class SaltedSeedSeq {
   // case we allocate a temporary 32-bit buffer and then copy-assign back
   // to the initial inputs.
   template <typename RandomAccessIterator>
-  void generate_impl(RandomAccessIterator begin, RandomAccessIterator end,
-                     DefaultTag) {
-    return generate_and_copy(std::distance(begin, end), begin);
-  }
-
-  // Fills the initial seed buffer the underlying SSeq::generate() call,
-  // mixing in the salt material.
-  void generate_contiguous(absl::Span<uint32_t> buffer) {
-    seq_->generate(buffer.begin(), buffer.end());
-    const uint32_t salt = absl::random_internal::GetSaltMaterial().value_or(0);
-    MixIntoSeedMaterial(absl::MakeConstSpan(&salt, 1), buffer);
-  }
-
-  // Allocates a seed buffer of `n` elements, generates the seed, then
-  // copies the result into the `out` iterator.
-  template <typename Iterator>
-  void generate_and_copy(size_t n, Iterator out) {
-    // Allocate a temporary buffer, generate, and then copy.
+  void generate_impl(DefaultTag, RandomAccessIterator begin,
+                     RandomAccessIterator, size_t n) {
+    // Allocates a seed buffer of `n` elements, generates the seed, then
+    // copies the result into the `out` iterator.
     absl::InlinedVector<uint32_t, 8> data(n, 0);
-    generate_contiguous(absl::MakeSpan(data.data(), data.size()));
-    std::copy(data.begin(), data.end(), out);
+    generate_impl(ContiguousAndUint32Tag{}, data.begin(), data.end(), n);
+    std::copy(data.begin(), data.end(), begin);
   }
 
   // Because [rand.req.seedseq] is not required to be copy-constructible,
diff --git a/third_party/abseil-cpp/absl/random/internal/seed_material.cc b/third_party/abseil-cpp/absl/random/internal/seed_material.cc
index c03cad8502..1041302b58 100644
--- a/third_party/abseil-cpp/absl/random/internal/seed_material.cc
+++ b/third_party/abseil-cpp/absl/random/internal/seed_material.cc
@@ -173,12 +173,12 @@ bool ReadSeedMaterialFromDevURandom(absl::Span<uint32_t> values) {
   }
 
   while (success && buffer_size > 0) {
-    int bytes_read = read(dev_urandom, buffer, buffer_size);
+    ssize_t bytes_read = read(dev_urandom, buffer, buffer_size);
     int read_error = errno;
     success = (bytes_read > 0);
     if (success) {
       buffer += bytes_read;
-      buffer_size -= bytes_read;
+      buffer_size -= static_cast<size_t>(bytes_read);
     } else if (bytes_read == -1 && read_error == EINTR) {
       success = true;  // Need to try again.
     }
diff --git a/third_party/abseil-cpp/absl/random/internal/traits.h b/third_party/abseil-cpp/absl/random/internal/traits.h
index 75772bd9ab..f874a0f78b 100644
--- a/third_party/abseil-cpp/absl/random/internal/traits.h
+++ b/third_party/abseil-cpp/absl/random/internal/traits.h
@@ -20,6 +20,8 @@
 #include <type_traits>
 
 #include "absl/base/config.h"
+#include "absl/numeric/bits.h"
+#include "absl/numeric/int128.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -59,6 +61,31 @@ class is_widening_convertible {
       rank<A>() <= rank<B>();
 };
 
+template <typename T>
+struct IsIntegral : std::is_integral<T> {};
+template <>
+struct IsIntegral<absl::int128> : std::true_type {};
+template <>
+struct IsIntegral<absl::uint128> : std::true_type {};
+
+template <typename T>
+struct MakeUnsigned : std::make_unsigned<T> {};
+template <>
+struct MakeUnsigned<absl::int128> {
+  using type = absl::uint128;
+};
+template <>
+struct MakeUnsigned<absl::uint128> {
+  using type = absl::uint128;
+};
+
+template <typename T>
+struct IsUnsigned : std::is_unsigned<T> {};
+template <>
+struct IsUnsigned<absl::int128> : std::false_type {};
+template <>
+struct IsUnsigned<absl::uint128> : std::true_type {};
+
 // unsigned_bits<N>::type returns the unsigned int type with the indicated
 // number of bits.
 template <size_t N>
@@ -81,19 +108,40 @@ struct unsigned_bits<64> {
   using type = uint64_t;
 };
 
-#ifdef ABSL_HAVE_INTRINSIC_INT128
 template <>
 struct unsigned_bits<128> {
-  using type = __uint128_t;
+  using type = absl::uint128;
+};
+
+// 256-bit wrapper for wide multiplications.
+struct U256 {
+  uint128 hi;
+  uint128 lo;
+};
+template <>
+struct unsigned_bits<256> {
+  using type = U256;
 };
-#endif
 
 template <typename IntType>
 struct make_unsigned_bits {
-  using type = typename unsigned_bits<std::numeric_limits<
-      typename std::make_unsigned<IntType>::type>::digits>::type;
+  using type = typename unsigned_bits<
+      std::numeric_limits<typename MakeUnsigned<IntType>::type>::digits>::type;
 };
 
+template <typename T>
+int BitWidth(T v) {
+  // Workaround for bit_width not supporting int128.
+  // Don't hardcode `64` to make sure this code does not trigger compiler
+  // warnings in smaller types.
+  constexpr int half_bits = sizeof(T) * 8 / 2;
+  if (sizeof(T) == 16 && (v >> half_bits) != 0) {
+    return bit_width(static_cast<uint64_t>(v >> half_bits)) + half_bits;
+  } else {
+    return bit_width(static_cast<uint64_t>(v));
+  }
+}
+
 }  // namespace random_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/random/internal/uniform_helper.h b/third_party/abseil-cpp/absl/random/internal/uniform_helper.h
index 1243bc1c62..e68b82ee5c 100644
--- a/third_party/abseil-cpp/absl/random/internal/uniform_helper.h
+++ b/third_party/abseil-cpp/absl/random/internal/uniform_helper.h
@@ -100,7 +100,7 @@ using uniform_inferred_return_t =
 template <typename IntType, typename Tag>
 typename absl::enable_if_t<
     absl::conjunction<
-        std::is_integral<IntType>,
+        IsIntegral<IntType>,
         absl::disjunction<std::is_same<Tag, IntervalOpenClosedTag>,
                           std::is_same<Tag, IntervalOpenOpenTag>>>::value,
     IntType>
@@ -131,7 +131,7 @@ uniform_lower_bound(Tag, NumType a, NumType) {
 template <typename IntType, typename Tag>
 typename absl::enable_if_t<
     absl::conjunction<
-        std::is_integral<IntType>,
+        IsIntegral<IntType>,
         absl::disjunction<std::is_same<Tag, IntervalClosedOpenTag>,
                           std::is_same<Tag, IntervalOpenOpenTag>>>::value,
     IntType>
@@ -153,7 +153,7 @@ uniform_upper_bound(Tag, FloatType, FloatType b) {
 template <typename IntType, typename Tag>
 typename absl::enable_if_t<
     absl::conjunction<
-        std::is_integral<IntType>,
+        IsIntegral<IntType>,
         absl::disjunction<std::is_same<Tag, IntervalClosedClosedTag>,
                           std::is_same<Tag, IntervalOpenClosedTag>>>::value,
     IntType>
@@ -201,7 +201,7 @@ is_uniform_range_valid(FloatType a, FloatType b) {
 }
 
 template <typename IntType>
-absl::enable_if_t<std::is_integral<IntType>::value, bool>
+absl::enable_if_t<IsIntegral<IntType>::value, bool>
 is_uniform_range_valid(IntType a, IntType b) {
   return a <= b;
 }
@@ -210,7 +210,7 @@ is_uniform_range_valid(IntType a, IntType b) {
 // or absl::uniform_real_distribution depending on the NumType parameter.
 template <typename NumType>
 using UniformDistribution =
-    typename std::conditional<std::is_integral<NumType>::value,
+    typename std::conditional<IsIntegral<NumType>::value,
                               absl::uniform_int_distribution<NumType>,
                               absl::uniform_real_distribution<NumType>>::type;
 
diff --git a/third_party/abseil-cpp/absl/random/internal/wide_multiply.h b/third_party/abseil-cpp/absl/random/internal/wide_multiply.h
index b6e6c4b6aa..891e3630b7 100644
--- a/third_party/abseil-cpp/absl/random/internal/wide_multiply.h
+++ b/third_party/abseil-cpp/absl/random/internal/wide_multiply.h
@@ -34,43 +34,6 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace random_internal {
 
-// Helper object to multiply two 64-bit values to a 128-bit value.
-// MultiplyU64ToU128 multiplies two 64-bit values to a 128-bit value.
-// If an intrinsic is available, it is used, otherwise use native 32-bit
-// multiplies to construct the result.
-inline absl::uint128 MultiplyU64ToU128(uint64_t a, uint64_t b) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  return absl::uint128(static_cast<__uint128_t>(a) * b);
-#elif defined(ABSL_INTERNAL_USE_UMUL128)
-  // uint64_t * uint64_t => uint128 multiply using imul intrinsic on MSVC.
-  uint64_t high = 0;
-  const uint64_t low = _umul128(a, b, &high);
-  return absl::MakeUint128(high, low);
-#else
-  // uint128(a) * uint128(b) in emulated mode computes a full 128-bit x 128-bit
-  // multiply.  However there are many cases where that is not necessary, and it
-  // is only necessary to support a 64-bit x 64-bit = 128-bit multiply.  This is
-  // for those cases.
-  const uint64_t a00 = static_cast<uint32_t>(a);
-  const uint64_t a32 = a >> 32;
-  const uint64_t b00 = static_cast<uint32_t>(b);
-  const uint64_t b32 = b >> 32;
-
-  const uint64_t c00 = a00 * b00;
-  const uint64_t c32a = a00 * b32;
-  const uint64_t c32b = a32 * b00;
-  const uint64_t c64 = a32 * b32;
-
-  const uint32_t carry =
-      static_cast<uint32_t>(((c00 >> 32) + static_cast<uint32_t>(c32a) +
-                             static_cast<uint32_t>(c32b)) >>
-                            32);
-
-  return absl::MakeUint128(c64 + (c32a >> 32) + (c32b >> 32) + carry,
-                           c00 + (c32a << 32) + (c32b << 32));
-#endif
-}
-
 // wide_multiply<T> multiplies two N-bit values to a 2N-bit result.
 template <typename UIntType>
 struct wide_multiply {
@@ -82,27 +45,49 @@ struct wide_multiply {
     return static_cast<result_type>(a) * b;
   }
 
-  static input_type hi(result_type r) { return r >> kN; }
-  static input_type lo(result_type r) { return r; }
+  static input_type hi(result_type r) {
+    return static_cast<input_type>(r >> kN);
+  }
+  static input_type lo(result_type r) { return static_cast<input_type>(r); }
 
   static_assert(std::is_unsigned<UIntType>::value,
                 "Class-template wide_multiply<> argument must be unsigned.");
 };
 
-#ifndef ABSL_HAVE_INTRINSIC_INT128
+// MultiplyU128ToU256 multiplies two 128-bit values to a 256-bit value.
+inline U256 MultiplyU128ToU256(uint128 a, uint128 b) {
+  const uint128 a00 = static_cast<uint64_t>(a);
+  const uint128 a64 = a >> 64;
+  const uint128 b00 = static_cast<uint64_t>(b);
+  const uint128 b64 = b >> 64;
+
+  const uint128 c00 = a00 * b00;
+  const uint128 c64a = a00 * b64;
+  const uint128 c64b = a64 * b00;
+  const uint128 c128 = a64 * b64;
+
+  const uint64_t carry =
+      static_cast<uint64_t>(((c00 >> 64) + static_cast<uint64_t>(c64a) +
+                             static_cast<uint64_t>(c64b)) >>
+                            64);
+
+  return {c128 + (c64a >> 64) + (c64b >> 64) + carry,
+          c00 + (c64a << 64) + (c64b << 64)};
+}
+
+
 template <>
-struct wide_multiply<uint64_t> {
-  using input_type = uint64_t;
-  using result_type = absl::uint128;
+struct wide_multiply<uint128> {
+  using input_type = uint128;
+  using result_type = U256;
 
-  static result_type multiply(uint64_t a, uint64_t b) {
-    return MultiplyU64ToU128(a, b);
+  static result_type multiply(input_type a, input_type b) {
+    return MultiplyU128ToU256(a, b);
   }
 
-  static uint64_t hi(result_type r) { return absl::Uint128High64(r); }
-  static uint64_t lo(result_type r) { return absl::Uint128Low64(r); }
+  static input_type hi(result_type r) { return r.hi; }
+  static input_type lo(result_type r) { return r.lo; }
 };
-#endif
 
 }  // namespace random_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/random/internal/wide_multiply_test.cc b/third_party/abseil-cpp/absl/random/internal/wide_multiply_test.cc
index e276cb51cf..f8ee35c03e 100644
--- a/third_party/abseil-cpp/absl/random/internal/wide_multiply_test.cc
+++ b/third_party/abseil-cpp/absl/random/internal/wide_multiply_test.cc
@@ -14,52 +14,106 @@
 
 #include "absl/random/internal/wide_multiply.h"
 
+#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/numeric/int128.h"
 
-using absl::random_internal::MultiplyU64ToU128;
+using absl::random_internal::MultiplyU128ToU256;
+using absl::random_internal::U256;
 
 namespace {
 
-TEST(WideMultiplyTest, MultiplyU64ToU128Test) {
-  constexpr uint64_t k1 = 1;
-  constexpr uint64_t kMax = ~static_cast<uint64_t>(0);
+U256 LeftShift(U256 v, int s) {
+  if (s == 0) {
+    return v;
+  } else if (s < 128) {
+    return {(v.hi << s) | (v.lo >> (128 - s)), v.lo << s};
+  } else {
+    return {v.lo << (s - 128), 0};
+  }
+}
+
+MATCHER_P2(Eq256, hi, lo, "") { return arg.hi == hi && arg.lo == lo; }
+MATCHER_P(Eq256, v, "") { return arg.hi == v.hi && arg.lo == v.lo; }
+
+TEST(WideMultiplyTest, MultiplyU128ToU256Test) {
+  using absl::uint128;
+  constexpr uint128 k1 = 1;
+  constexpr uint128 kMax = ~static_cast<uint128>(0);
 
-  EXPECT_EQ(absl::uint128(0), MultiplyU64ToU128(0, 0));
+  EXPECT_THAT(MultiplyU128ToU256(0, 0), Eq256(0, 0));
 
-  // Max uint64_t
-  EXPECT_EQ(MultiplyU64ToU128(kMax, kMax),
-            absl::MakeUint128(0xfffffffffffffffe, 0x0000000000000001));
-  EXPECT_EQ(absl::MakeUint128(0, kMax), MultiplyU64ToU128(kMax, 1));
-  EXPECT_EQ(absl::MakeUint128(0, kMax), MultiplyU64ToU128(1, kMax));
+  // Max uin128_t
+  EXPECT_THAT(MultiplyU128ToU256(kMax, kMax), Eq256(kMax << 1, 1));
+  EXPECT_THAT(MultiplyU128ToU256(kMax, 1), Eq256(0, kMax));
+  EXPECT_THAT(MultiplyU128ToU256(1, kMax), Eq256(0, kMax));
   for (int i = 0; i < 64; ++i) {
-    EXPECT_EQ(absl::MakeUint128(0, kMax) << i,
-              MultiplyU64ToU128(kMax, k1 << i));
-    EXPECT_EQ(absl::MakeUint128(0, kMax) << i,
-              MultiplyU64ToU128(k1 << i, kMax));
+    SCOPED_TRACE(i);
+    EXPECT_THAT(MultiplyU128ToU256(kMax, k1 << i),
+                Eq256(LeftShift({0, kMax}, i)));
+    EXPECT_THAT(MultiplyU128ToU256(k1 << i, kMax),
+                Eq256(LeftShift({0, kMax}, i)));
   }
 
   // 1-bit x 1-bit.
   for (int i = 0; i < 64; ++i) {
     for (int j = 0; j < 64; ++j) {
-      EXPECT_EQ(absl::MakeUint128(0, 1) << (i + j),
-                MultiplyU64ToU128(k1 << i, k1 << j));
-      EXPECT_EQ(absl::MakeUint128(0, 1) << (i + j),
-                MultiplyU64ToU128(k1 << i, k1 << j));
+      EXPECT_THAT(MultiplyU128ToU256(k1 << i, k1 << j),
+                  Eq256(LeftShift({0, 1}, i + j)));
     }
   }
 
   // Verified multiplies
-  EXPECT_EQ(MultiplyU64ToU128(0xffffeeeeddddcccc, 0xbbbbaaaa99998888),
-            absl::MakeUint128(0xbbbb9e2692c5dddc, 0xc28f7531048d2c60));
-  EXPECT_EQ(MultiplyU64ToU128(0x0123456789abcdef, 0xfedcba9876543210),
-            absl::MakeUint128(0x0121fa00ad77d742, 0x2236d88fe5618cf0));
-  EXPECT_EQ(MultiplyU64ToU128(0x0123456789abcdef, 0xfdb97531eca86420),
-            absl::MakeUint128(0x0120ae99d26725fc, 0xce197f0ecac319e0));
-  EXPECT_EQ(MultiplyU64ToU128(0x97a87f4f261ba3f2, 0xfedcba9876543210),
-            absl::MakeUint128(0x96fbf1a8ae78d0ba, 0x5a6dd4b71f278320));
-  EXPECT_EQ(MultiplyU64ToU128(0xfedcba9876543210, 0xfdb97531eca86420),
-            absl::MakeUint128(0xfc98c6981a413e22, 0x342d0bbf48948200));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0xc502da0d6ea99fe8, 0xfa3c9141a1f50912),
+                  absl::MakeUint128(0x96bcf1ac37f97bd6, 0x27e2cdeb5fb2299e)),
+              Eq256(absl::MakeUint128(0x740113d838f96a64, 0x22e8cfa4d71f89ea),
+                    absl::MakeUint128(0x19184a345c62e993, 0x237871b630337b1c)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0x6f29e670cee07230, 0xc3d8e6c3e4d86759),
+                  absl::MakeUint128(0x3227d29fa6386db1, 0x231682bb1e4b764f)),
+              Eq256(absl::MakeUint128(0x15c779d9d5d3b07c, 0xd7e6c827f0c81cbe),
+                    absl::MakeUint128(0xf88e3914f7fa287a, 0x15b79975137dea77)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0xafb77107215646e1, 0x3b844cb1ac5769e7),
+                  absl::MakeUint128(0x1ff7b2d888b62479, 0x92f758ae96fcba0b)),
+              Eq256(absl::MakeUint128(0x15f13b70181f6985, 0x2adb36bbabce7d02),
+                    absl::MakeUint128(0x6c470d72e13aad04, 0x63fba3f5841762ed)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0xd85d5558d67ac905, 0xf88c70654dae19b1),
+                  absl::MakeUint128(0x17252c6727db3738, 0x399ff658c511eedc)),
+              Eq256(absl::MakeUint128(0x138fcdaf8b0421ee, 0x1b465ddf2a0d03f6),
+                    absl::MakeUint128(0x8f573ba68296860f, 0xf327d2738741a21c)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0x46f0421a37ff6bee, 0xa61df89f09d140b1),
+                  absl::MakeUint128(0x3d712ec9f37ca2e1, 0x9658a2cba47ef4b1)),
+              Eq256(absl::MakeUint128(0x11069cc48ee7c95d, 0xd35fb1c7aa91c978),
+                    absl::MakeUint128(0xbe2f4a6de874b015, 0xd2f7ac1b76746e61)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0x730d27c72d58fa49, 0x3ebeda7498f8827c),
+                  absl::MakeUint128(0xa2c959eca9f503af, 0x189c687eb842bbd8)),
+              Eq256(absl::MakeUint128(0x4928d0ea356ba022, 0x1546d34a2963393),
+                    absl::MakeUint128(0x7481531e1e0a16d1, 0xdd8025015cf6aca0)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0x6ca41020f856d2f1, 0xb9b0838c04a7f4aa),
+                  absl::MakeUint128(0x9cf41d28a8396f54, 0x1d681695e377ffe6)),
+              Eq256(absl::MakeUint128(0x429b92934d9be6f1, 0xea182877157c1e7),
+                    absl::MakeUint128(0x7135c23f0a4a475, 0xc1adc366f4a126bc)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0x57472833797c332, 0x6c79272fdec4687a),
+                  absl::MakeUint128(0xb5f022ea3838e46b, 0x16face2f003e27a6)),
+              Eq256(absl::MakeUint128(0x3e072e0962b3400, 0x5d9fe8fdc3d0e1f4),
+                    absl::MakeUint128(0x7dc0df47cedafd62, 0xbe6501f1acd2551c)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0xf0fb4198322eb1c2, 0xfe7f5f31f3885938),
+                  absl::MakeUint128(0xd99012b71bb7aa31, 0xac7a6f9eb190789)),
+              Eq256(absl::MakeUint128(0xcccc998cf075ca01, 0x642d144322fb873a),
+                    absl::MakeUint128(0xc79dc12b69d91ed4, 0xa83459132ce046f8)));
+  EXPECT_THAT(MultiplyU128ToU256(
+                  absl::MakeUint128(0xb5c04120848cdb47, 0x8aa62a827bf52635),
+                  absl::MakeUint128(0x8d07a359be2f1380, 0x467bb90d59da0dea)),
+              Eq256(absl::MakeUint128(0x64205019d139a9ce, 0x99425c5fb6e7a977),
+                    absl::MakeUint128(0xd3e99628a9e5fca7, 0x9c7824cb7279d72)));
 }
 
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/random/log_uniform_int_distribution.h b/third_party/abseil-cpp/absl/random/log_uniform_int_distribution.h
index 43e101169c..4afff8f604 100644
--- a/third_party/abseil-cpp/absl/random/log_uniform_int_distribution.h
+++ b/third_party/abseil-cpp/absl/random/log_uniform_int_distribution.h
@@ -69,10 +69,8 @@ class log_uniform_int_distribution {
       if (base_ == 2) {
         // Determine where the first set bit is on range(), giving a log2(range)
         // value which can be used to construct bounds.
-        log_range_ =
-            (std::min)(bit_width(range()),
-                       static_cast<unsigned_type>(
-                           std::numeric_limits<unsigned_type>::digits));
+        log_range_ = (std::min)(random_internal::BitWidth(range()),
+                                std::numeric_limits<unsigned_type>::digits);
       } else {
         // NOTE: Computing the logN(x) introduces error from 2 sources:
         // 1. Conversion of int to double loses precision for values >=
@@ -83,7 +81,7 @@ class log_uniform_int_distribution {
         //
         // Thus a result which should equal K may equal K +/- epsilon,
         // which can eliminate some values depending on where the bounds fall.
-        const double inv_log_base = 1.0 / std::log(base_);
+        const double inv_log_base = 1.0 / std::log(static_cast<double>(base_));
         const double log_range = std::log(static_cast<double>(range()) + 0.5);
         log_range_ = static_cast<int>(std::ceil(inv_log_base * log_range));
       }
@@ -113,7 +111,7 @@ class log_uniform_int_distribution {
     unsigned_type range_;  // max - min
     int log_range_;        // ceil(logN(range_))
 
-    static_assert(std::is_integral<IntType>::value,
+    static_assert(random_internal::IsIntegral<IntType>::value,
                   "Class-template absl::log_uniform_int_distribution<> must be "
                   "parameterized using an integral type.");
   };
@@ -139,7 +137,7 @@ class log_uniform_int_distribution {
   template <typename URBG>
   result_type operator()(URBG& g,  // NOLINT(runtime/references)
                          const param_type& p) {
-    return (p.min)() + Generate(g, p);
+    return static_cast<result_type>((p.min)() + Generate(g, p));
   }
 
   result_type(min)() const { return (param_.min)(); }
@@ -193,8 +191,8 @@ log_uniform_int_distribution<IntType>::Generate(
                 ? (std::numeric_limits<unsigned_type>::max)()
                 : (static_cast<unsigned_type>(1) << e) - 1;
   } else {
-    const double r = std::pow(p.base(), d);
-    const double s = (r * p.base()) - 1.0;
+    const double r = std::pow(static_cast<double>(p.base()), d);
+    const double s = (r * static_cast<double>(p.base())) - 1.0;
 
     base_e =
         (r > static_cast<double>((std::numeric_limits<unsigned_type>::max)()))
@@ -211,7 +209,8 @@ log_uniform_int_distribution<IntType>::Generate(
   const unsigned_type hi = (top_e >= p.range()) ? p.range() : top_e;
 
   // choose uniformly over [lo, hi]
-  return absl::uniform_int_distribution<result_type>(lo, hi)(g);
+  return absl::uniform_int_distribution<result_type>(
+      static_cast<result_type>(lo), static_cast<result_type>(hi))(g);
 }
 
 template <typename CharT, typename Traits, typename IntType>
diff --git a/third_party/abseil-cpp/absl/random/log_uniform_int_distribution_test.cc b/third_party/abseil-cpp/absl/random/log_uniform_int_distribution_test.cc
index 5e780d96d3..0d0fcb9597 100644
--- a/third_party/abseil-cpp/absl/random/log_uniform_int_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/log_uniform_int_distribution_test.cc
@@ -42,7 +42,7 @@ class LogUniformIntDistributionTypeTest : public ::testing::Test {};
 
 using IntTypes = ::testing::Types<int8_t, int16_t, int32_t, int64_t,  //
                                   uint8_t, uint16_t, uint32_t, uint64_t>;
-TYPED_TEST_CASE(LogUniformIntDistributionTypeTest, IntTypes);
+TYPED_TEST_SUITE(LogUniformIntDistributionTypeTest, IntTypes);
 
 TYPED_TEST(LogUniformIntDistributionTypeTest, SerializeTest) {
   using param_type =
diff --git a/third_party/abseil-cpp/absl/random/mocking_bit_gen.h b/third_party/abseil-cpp/absl/random/mocking_bit_gen.h
index 7b2b80eb35..89fa5a47a6 100644
--- a/third_party/abseil-cpp/absl/random/mocking_bit_gen.h
+++ b/third_party/abseil-cpp/absl/random/mocking_bit_gen.h
@@ -87,7 +87,7 @@ class BitGenRef;
 //
 //   ON_CALL(absl::MockUniform<int>(), Call(bitgen, testing::_, testing::_))
 //       .WillByDefault([] (int low, int high) {
-//           return (low + high) / 2;
+//           return low + (high - low) / 2;
 //       });
 //
 //   EXPECT_EQ(absl::Uniform<int>(gen, 0, 10), 5);
diff --git a/third_party/abseil-cpp/absl/random/poisson_distribution.h b/third_party/abseil-cpp/absl/random/poisson_distribution.h
index cb5f5d5d0f..f4573082e1 100644
--- a/third_party/abseil-cpp/absl/random/poisson_distribution.h
+++ b/third_party/abseil-cpp/absl/random/poisson_distribution.h
@@ -26,6 +26,7 @@
 #include "absl/random/internal/fastmath.h"
 #include "absl/random/internal/generate_real.h"
 #include "absl/random/internal/iostream_state_saver.h"
+#include "absl/random/internal/traits.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -80,7 +81,7 @@ class poisson_distribution {
     double log_k_;
     int split_;
 
-    static_assert(std::is_integral<IntType>::value,
+    static_assert(random_internal::IsIntegral<IntType>::value,
                   "Class-template absl::poisson_distribution<> must be "
                   "parameterized using an integral type.");
   };
@@ -133,7 +134,8 @@ template <typename IntType>
 poisson_distribution<IntType>::param_type::param_type(double mean)
     : mean_(mean), split_(0) {
   assert(mean >= 0);
-  assert(mean <= (std::numeric_limits<result_type>::max)());
+  assert(mean <=
+         static_cast<double>((std::numeric_limits<result_type>::max)()));
   // As a defensive measure, avoid large values of the mean.  The rejection
   // algorithm used does not support very large values well.  It my be worth
   // changing algorithms to better deal with these cases.
@@ -222,8 +224,9 @@ poisson_distribution<IntType>::operator()(
     // clang-format on
     const double lhs = 2.0 * std::log(u) + p.log_k_ + s;
     if (lhs < rhs) {
-      return x > (max)() ? (max)()
-                         : static_cast<result_type>(x);  // f(x)/k >= u^2
+      return x > static_cast<double>((max)())
+                 ? (max)()
+                 : static_cast<result_type>(x);  // f(x)/k >= u^2
     }
   }
 }
diff --git a/third_party/abseil-cpp/absl/random/poisson_distribution_test.cc b/third_party/abseil-cpp/absl/random/poisson_distribution_test.cc
index 8baabd1118..4f585b9b2b 100644
--- a/third_party/abseil-cpp/absl/random/poisson_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/poisson_distribution_test.cc
@@ -73,7 +73,7 @@ class PoissonDistributionInterfaceTest : public ::testing::Test {};
 
 using IntTypes = ::testing::Types<int, int8_t, int16_t, int32_t, int64_t,
                                   uint8_t, uint16_t, uint32_t, uint64_t>;
-TYPED_TEST_CASE(PoissonDistributionInterfaceTest, IntTypes);
+TYPED_TEST_SUITE(PoissonDistributionInterfaceTest, IntTypes);
 
 TYPED_TEST(PoissonDistributionInterfaceTest, SerializeTest) {
   using param_type = typename absl::poisson_distribution<TypeParam>::param_type;
diff --git a/third_party/abseil-cpp/absl/random/seed_sequences.h b/third_party/abseil-cpp/absl/random/seed_sequences.h
index ff1340cc8e..c3af4b00a4 100644
--- a/third_party/abseil-cpp/absl/random/seed_sequences.h
+++ b/third_party/abseil-cpp/absl/random/seed_sequences.h
@@ -28,6 +28,7 @@
 #include <iterator>
 #include <random>
 
+#include "absl/base/config.h"
 #include "absl/random/internal/salted_seed_seq.h"
 #include "absl/random/internal/seed_material.h"
 #include "absl/random/seed_gen_exception.h"
diff --git a/third_party/abseil-cpp/absl/random/uniform_int_distribution.h b/third_party/abseil-cpp/absl/random/uniform_int_distribution.h
index c1f54ccebc..fae80252e3 100644
--- a/third_party/abseil-cpp/absl/random/uniform_int_distribution.h
+++ b/third_party/abseil-cpp/absl/random/uniform_int_distribution.h
@@ -97,7 +97,7 @@ class uniform_int_distribution {
     result_type lo_;
     unsigned_type range_;
 
-    static_assert(std::is_integral<result_type>::value,
+    static_assert(random_internal::IsIntegral<result_type>::value,
                   "Class-template absl::uniform_int_distribution<> must be "
                   "parameterized using an integral type.");
   };  // param_type
@@ -125,7 +125,7 @@ class uniform_int_distribution {
   template <typename URBG>
   result_type operator()(
       URBG& gen, const param_type& param) {  // NOLINT(runtime/references)
-    return param.a() + Generate(gen, param.range());
+    return static_cast<result_type>(param.a() + Generate(gen, param.range()));
   }
 
   result_type a() const { return param_.a(); }
diff --git a/third_party/abseil-cpp/absl/random/uniform_real_distribution.h b/third_party/abseil-cpp/absl/random/uniform_real_distribution.h
index 5ba17b2341..196833415e 100644
--- a/third_party/abseil-cpp/absl/random/uniform_real_distribution.h
+++ b/third_party/abseil-cpp/absl/random/uniform_real_distribution.h
@@ -73,12 +73,12 @@ class uniform_real_distribution {
         : lo_(lo), hi_(hi), range_(hi - lo) {
       // [rand.dist.uni.real] preconditions 2 & 3
       assert(lo <= hi);
+
       // NOTE: For integral types, we can promote the range to an unsigned type,
       // which gives full width of the range. However for real (fp) types, this
       // is not possible, so value generation cannot use the full range of the
       // real type.
       assert(range_ <= (std::numeric_limits<result_type>::max)());
-      assert(std::isfinite(range_));
     }
 
     result_type a() const { return lo_; }
diff --git a/third_party/abseil-cpp/absl/random/uniform_real_distribution_test.cc b/third_party/abseil-cpp/absl/random/uniform_real_distribution_test.cc
index 035bd284d1..07f199d34c 100644
--- a/third_party/abseil-cpp/absl/random/uniform_real_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/uniform_real_distribution_test.cc
@@ -78,62 +78,74 @@ TYPED_TEST(UniformRealDistributionTest, ParamSerializeTest) {
   GTEST_SKIP()
       << "Skipping the test because we detected x87 floating-point semantics";
 #endif
+  using DistributionType = absl::uniform_real_distribution<TypeParam>;
+  using real_type = TypeParam;
+  using param_type = typename DistributionType::param_type;
 
-  using param_type =
-      typename absl::uniform_real_distribution<TypeParam>::param_type;
+  constexpr const real_type kMax = std::numeric_limits<real_type>::max();
+  constexpr const real_type kMin = std::numeric_limits<real_type>::min();
+  constexpr const real_type kEpsilon =
+      std::numeric_limits<real_type>::epsilon();
+  constexpr const real_type kLowest =
+      std::numeric_limits<real_type>::lowest();  // -max
 
-  constexpr const TypeParam a{1152921504606846976};
+  const real_type kDenormMax = std::nextafter(kMin, real_type{0});
+  const real_type kOneMinusE =
+      std::nextafter(real_type{1}, real_type{0});  // 1 - epsilon
+
+  constexpr const real_type kTwo60{1152921504606846976};  // 2^60
 
   constexpr int kCount = 1000;
   absl::InsecureBitGen gen;
   for (const auto& param : {
            param_type(),
-           param_type(TypeParam(2.0), TypeParam(2.0)),  // Same
-           param_type(TypeParam(-0.1), TypeParam(0.1)),
-           param_type(TypeParam(0.05), TypeParam(0.12)),
-           param_type(TypeParam(-0.05), TypeParam(0.13)),
-           param_type(TypeParam(-0.05), TypeParam(-0.02)),
+           param_type(real_type{0}, real_type{1}),
+           param_type(real_type(-0.1), real_type(0.1)),
+           param_type(real_type(0.05), real_type(0.12)),
+           param_type(real_type(-0.05), real_type(0.13)),
+           param_type(real_type(-0.05), real_type(-0.02)),
+           // range = 0
+           param_type(real_type(2.0), real_type(2.0)),  // Same
            // double range = 0
            // 2^60 , 2^60 + 2^6
-           param_type(a, TypeParam(1152921504606847040)),
+           param_type(kTwo60, real_type(1152921504606847040)),
            // 2^60 , 2^60 + 2^7
-           param_type(a, TypeParam(1152921504606847104)),
+           param_type(kTwo60, real_type(1152921504606847104)),
            // double range = 2^8
            // 2^60 , 2^60 + 2^8
-           param_type(a, TypeParam(1152921504606847232)),
+           param_type(kTwo60, real_type(1152921504606847232)),
            // float range = 0
            // 2^60 , 2^60 + 2^36
-           param_type(a, TypeParam(1152921573326323712)),
+           param_type(kTwo60, real_type(1152921573326323712)),
            // 2^60 , 2^60 + 2^37
-           param_type(a, TypeParam(1152921642045800448)),
+           param_type(kTwo60, real_type(1152921642045800448)),
            // float range = 2^38
            // 2^60 , 2^60 + 2^38
-           param_type(a, TypeParam(1152921779484753920)),
+           param_type(kTwo60, real_type(1152921779484753920)),
            // Limits
-           param_type(0, std::numeric_limits<TypeParam>::max()),
-           param_type(std::numeric_limits<TypeParam>::lowest(), 0),
-           param_type(0, std::numeric_limits<TypeParam>::epsilon()),
-           param_type(-std::numeric_limits<TypeParam>::epsilon(),
-                      std::numeric_limits<TypeParam>::epsilon()),
-           param_type(std::numeric_limits<TypeParam>::epsilon(),
-                      2 * std::numeric_limits<TypeParam>::epsilon()),
+           param_type(0, kMax),
+           param_type(kLowest, 0),
+           param_type(0, kMin),
+           param_type(0, kEpsilon),
+           param_type(-kEpsilon, kEpsilon),
+           param_type(0, kOneMinusE),
+           param_type(0, kDenormMax),
        }) {
     // Validate parameters.
     const auto a = param.a();
     const auto b = param.b();
-    absl::uniform_real_distribution<TypeParam> before(a, b);
+    DistributionType before(a, b);
     EXPECT_EQ(before.a(), param.a());
     EXPECT_EQ(before.b(), param.b());
 
     {
-      absl::uniform_real_distribution<TypeParam> via_param(param);
+      DistributionType via_param(param);
       EXPECT_EQ(via_param, before);
     }
 
     std::stringstream ss;
     ss << before;
-    absl::uniform_real_distribution<TypeParam> after(TypeParam(1.0),
-                                                     TypeParam(3.1));
+    DistributionType after(real_type(1.0), real_type(3.1));
 
     EXPECT_NE(before.a(), after.a());
     EXPECT_NE(before.b(), after.b());
@@ -168,7 +180,7 @@ TYPED_TEST(UniformRealDistributionTest, ParamSerializeTest) {
       }
     }
 
-    if (!std::is_same<TypeParam, long double>::value) {
+    if (!std::is_same<real_type, long double>::value) {
       // static_cast<double>(long double) can overflow.
       std::string msg = absl::StrCat("Range: ", static_cast<double>(sample_min),
                                      ", ", static_cast<double>(sample_max));
@@ -182,33 +194,52 @@ TYPED_TEST(UniformRealDistributionTest, ParamSerializeTest) {
 #pragma warning(disable:4756)  // Constant arithmetic overflow.
 #endif
 TYPED_TEST(UniformRealDistributionTest, ViolatesPreconditionsDeathTest) {
+  using DistributionType = absl::uniform_real_distribution<TypeParam>;
+  using real_type = TypeParam;
+
 #if GTEST_HAS_DEATH_TEST
   // Hi < Lo
-  EXPECT_DEBUG_DEATH(
-      { absl::uniform_real_distribution<TypeParam> dist(10.0, 1.0); }, "");
+  EXPECT_DEBUG_DEATH({ DistributionType dist(10.0, 1.0); }, "");
 
   // Hi - Lo > numeric_limits<>::max()
   EXPECT_DEBUG_DEATH(
       {
-        absl::uniform_real_distribution<TypeParam> dist(
-            std::numeric_limits<TypeParam>::lowest(),
-            std::numeric_limits<TypeParam>::max());
+        DistributionType dist(std::numeric_limits<real_type>::lowest(),
+                              std::numeric_limits<real_type>::max());
+      },
+      "");
+
+  // kEpsilon guarantees that max + kEpsilon = inf.
+  const auto kEpsilon = std::nexttoward(
+      (std::numeric_limits<real_type>::max() -
+       std::nexttoward(std::numeric_limits<real_type>::max(), 0.0)) /
+          2,
+      std::numeric_limits<real_type>::max());
+  EXPECT_DEBUG_DEATH(
+      {
+        DistributionType dist(-kEpsilon, std::numeric_limits<real_type>::max());
       },
       "");
+  EXPECT_DEBUG_DEATH(
+      {
+        DistributionType dist(std::numeric_limits<real_type>::lowest(),
+                              kEpsilon);
+      },
+      "");
+
 #endif  // GTEST_HAS_DEATH_TEST
 #if defined(NDEBUG)
   // opt-mode, for invalid parameters, will generate a garbage value,
   // but should not enter an infinite loop.
   absl::InsecureBitGen gen;
   {
-    absl::uniform_real_distribution<TypeParam> dist(10.0, 1.0);
+    DistributionType dist(10.0, 1.0);
     auto x = dist(gen);
     EXPECT_FALSE(std::isnan(x)) << x;
   }
   {
-    absl::uniform_real_distribution<TypeParam> dist(
-        std::numeric_limits<TypeParam>::lowest(),
-        std::numeric_limits<TypeParam>::max());
+    DistributionType dist(std::numeric_limits<real_type>::lowest(),
+                          std::numeric_limits<real_type>::max());
     auto x = dist(gen);
     // Infinite result.
     EXPECT_FALSE(std::isfinite(x)) << x;
@@ -220,6 +251,8 @@ TYPED_TEST(UniformRealDistributionTest, ViolatesPreconditionsDeathTest) {
 #endif
 
 TYPED_TEST(UniformRealDistributionTest, TestMoments) {
+  using DistributionType = absl::uniform_real_distribution<TypeParam>;
+
   constexpr int kSize = 1000000;
   std::vector<double> values(kSize);
 
@@ -228,7 +261,7 @@ TYPED_TEST(UniformRealDistributionTest, TestMoments) {
   // implementation.
   absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6};
 
-  absl::uniform_real_distribution<TypeParam> dist;
+  DistributionType dist;
   for (int i = 0; i < kSize; i++) {
     values[i] = dist(rng);
   }
@@ -242,9 +275,10 @@ TYPED_TEST(UniformRealDistributionTest, TestMoments) {
 }
 
 TYPED_TEST(UniformRealDistributionTest, ChiSquaredTest50) {
+  using DistributionType = absl::uniform_real_distribution<TypeParam>;
+  using param_type = typename DistributionType::param_type;
+
   using absl::random_internal::kChiSquared;
-  using param_type =
-      typename absl::uniform_real_distribution<TypeParam>::param_type;
 
   constexpr size_t kTrials = 100000;
   constexpr int kBuckets = 50;
@@ -269,7 +303,7 @@ TYPED_TEST(UniformRealDistributionTest, ChiSquaredTest50) {
     const double factor = kBuckets / (max_val - min_val);
 
     std::vector<int32_t> counts(kBuckets, 0);
-    absl::uniform_real_distribution<TypeParam> dist(param);
+    DistributionType dist(param);
     for (size_t i = 0; i < kTrials; i++) {
       auto x = dist(rng);
       auto bucket = static_cast<size_t>((x - min_val) * factor);
@@ -297,8 +331,11 @@ TYPED_TEST(UniformRealDistributionTest, ChiSquaredTest50) {
 }
 
 TYPED_TEST(UniformRealDistributionTest, StabilityTest) {
+  using DistributionType = absl::uniform_real_distribution<TypeParam>;
+  using real_type = TypeParam;
+
   // absl::uniform_real_distribution stability relies only on
-  // random_internal::RandU64ToDouble and random_internal::RandU64ToFloat.
+  // random_internal::GenerateRealFromBits.
   absl::random_internal::sequence_urbg urbg(
       {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
        0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
@@ -307,9 +344,9 @@ TYPED_TEST(UniformRealDistributionTest, StabilityTest) {
 
   std::vector<int> output(12);
 
-  absl::uniform_real_distribution<TypeParam> dist;
+  DistributionType dist;
   std::generate(std::begin(output), std::end(output), [&] {
-    return static_cast<int>(TypeParam(1000000) * dist(urbg));
+    return static_cast<int>(real_type(1000000) * dist(urbg));
   });
 
   EXPECT_THAT(
diff --git a/third_party/abseil-cpp/absl/random/zipf_distribution.h b/third_party/abseil-cpp/absl/random/zipf_distribution.h
index 22ebc756cf..03497b1b26 100644
--- a/third_party/abseil-cpp/absl/random/zipf_distribution.h
+++ b/third_party/abseil-cpp/absl/random/zipf_distribution.h
@@ -23,13 +23,14 @@
 #include <type_traits>
 
 #include "absl/random/internal/iostream_state_saver.h"
+#include "absl/random/internal/traits.h"
 #include "absl/random/uniform_real_distribution.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
 // absl::zipf_distribution produces random integer-values in the range [0, k],
-// distributed according to the discrete probability function:
+// distributed according to the unnormalized discrete probability function:
 //
 //  P(x) = (v + x) ^ -q
 //
@@ -94,7 +95,7 @@ class zipf_distribution {
     double hxm_;              // h(k + 0.5)
     double hx0_minus_hxm_;    // h(x0) - h(k + 0.5)
 
-    static_assert(std::is_integral<IntType>::value,
+    static_assert(random_internal::IsIntegral<IntType>::value,
                   "Class-template absl::zipf_distribution<> must be "
                   "parameterized using an integral type.");
   };
@@ -221,7 +222,7 @@ zipf_distribution<IntType>::operator()(
     const double u = p.hxm_ + v * p.hx0_minus_hxm_;
     const double x = p.hinv(u);
     k = rint(x);              // std::floor(x + 0.5);
-    if (k > p.k()) continue;  // reject k > max_k
+    if (k > static_cast<double>(p.k())) continue;  // reject k > max_k
     if (k - x <= p.s_) break;
     const double h = p.h(k + 0.5);
     const double r = p.pow_negative_q(p.v_ + k);
diff --git a/third_party/abseil-cpp/absl/random/zipf_distribution_test.cc b/third_party/abseil-cpp/absl/random/zipf_distribution_test.cc
index f8cf70e0dd..c8bb89db2e 100644
--- a/third_party/abseil-cpp/absl/random/zipf_distribution_test.cc
+++ b/third_party/abseil-cpp/absl/random/zipf_distribution_test.cc
@@ -44,7 +44,7 @@ class ZipfDistributionTypedTest : public ::testing::Test {};
 
 using IntTypes = ::testing::Types<int, int8_t, int16_t, int32_t, int64_t,
                                   uint8_t, uint16_t, uint32_t, uint64_t>;
-TYPED_TEST_CASE(ZipfDistributionTypedTest, IntTypes);
+TYPED_TEST_SUITE(ZipfDistributionTypedTest, IntTypes);
 
 TYPED_TEST(ZipfDistributionTypedTest, SerializeTest) {
   using param_type = typename absl::zipf_distribution<TypeParam>::param_type;
diff --git a/third_party/abseil-cpp/absl/status/BUILD.bazel b/third_party/abseil-cpp/absl/status/BUILD.bazel
index bae5156f4a..ce0ea70ca7 100644
--- a/third_party/abseil-cpp/absl/status/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/status/BUILD.bazel
@@ -20,6 +20,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -39,11 +40,12 @@ cc_library(
         "status_payload_printer.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:atomic_hook",
-        "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/base:raw_logging_internal",
+        "//absl/base:strerror",
         "//absl/container:inlined_vector",
         "//absl/debugging:stacktrace",
         "//absl/debugging:symbolize",
@@ -76,6 +78,7 @@ cc_library(
         "statusor.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":status",
         "//absl/base",
diff --git a/third_party/abseil-cpp/absl/status/BUILD.gn b/third_party/abseil-cpp/absl/status/BUILD.gn
new file mode 100644
index 0000000000..6b10a2b51b
--- /dev/null
+++ b/third_party/abseil-cpp/absl/status/BUILD.gn
@@ -0,0 +1,62 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("status") {
+  public = [
+    "status.h",
+    "status_payload_printer.h",
+  ]
+  sources = [
+    "internal/status_internal.h",
+    "status.cc",
+    "status_payload_printer.cc",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:atomic_hook",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/base:strerror",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/debugging:stacktrace",
+    "//third_party/abseil-cpp/absl/debugging:symbolize",
+    "//third_party/abseil-cpp/absl/functional:function_ref",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/strings:cord",
+    "//third_party/abseil-cpp/absl/strings:str_format",
+    "//third_party/abseil-cpp/absl/types:optional",
+  ]
+}
+
+absl_source_set("statusor") {
+  public = [ "statusor.h" ]
+  sources = [
+    "internal/statusor_internal.h",
+    "statusor.cc",
+  ]
+  deps = [
+    ":status",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:variant",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_test("statusor_test") {
+  sources = [ "statusor_test.cc" ]
+  deps = [
+    ":status",
+    ":statusor",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/types:any",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/status/CMakeLists.txt b/third_party/abseil-cpp/absl/status/CMakeLists.txt
index f107c85b1c..15db36af68 100644
--- a/third_party/abseil-cpp/absl/status/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/status/CMakeLists.txt
@@ -28,16 +28,17 @@ absl_cc_library(
   DEPS
     absl::atomic_hook
     absl::config
+    absl::cord
     absl::core_headers
     absl::function_ref
-    absl::raw_logging_internal
     absl::inlined_vector
+    absl::optional
+    absl::raw_logging_internal
     absl::stacktrace
-    absl::symbolize
-    absl::strings
-    absl::cord
     absl::str_format
-    absl::optional
+    absl::strerror
+    absl::strings
+    absl::symbolize
   PUBLIC
 )
 
diff --git a/third_party/abseil-cpp/absl/status/internal/status_internal.h b/third_party/abseil-cpp/absl/status/internal/status_internal.h
index ac12940a6d..873eb5c245 100644
--- a/third_party/abseil-cpp/absl/status/internal/status_internal.h
+++ b/third_party/abseil-cpp/absl/status/internal/status_internal.h
@@ -14,8 +14,11 @@
 #ifndef ABSL_STATUS_INTERNAL_STATUS_INTERNAL_H_
 #define ABSL_STATUS_INTERNAL_STATUS_INTERNAL_H_
 
+#include <memory>
 #include <string>
+#include <utility>
 
+#include "absl/base/attributes.h"
 #include "absl/container/inlined_vector.h"
 #include "absl/strings/cord.h"
 
@@ -25,7 +28,14 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 // Returned Status objects may not be ignored. Codesearch doesn't handle ifdefs
 // as part of a class definitions (b/6995610), so we use a forward declaration.
+//
+// TODO(b/176172494): ABSL_MUST_USE_RESULT should expand to the more strict
+// [[nodiscard]]. For now, just use [[nodiscard]] directly when it is available.
+#if ABSL_HAVE_CPP_ATTRIBUTE(nodiscard)
+class [[nodiscard]] Status;
+#else
 class ABSL_MUST_USE_RESULT Status;
+#endif
 ABSL_NAMESPACE_END
 }  // namespace absl
 #endif  // !SWIG
@@ -61,6 +71,14 @@ struct StatusRep {
 };
 
 absl::StatusCode MapToLocalCode(int value);
+
+// Returns a pointer to a newly-allocated string with the given `prefix`,
+// suitable for output as an error message in assertion/`CHECK()` failures.
+//
+// This is an internal implementation detail for Abseil logging.
+std::string* MakeCheckFailString(const absl::Status* status,
+                                 const char* prefix);
+
 }  // namespace status_internal
 
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/status/status.cc b/third_party/abseil-cpp/absl/status/status.cc
index bcf3413e5f..bbf2335d85 100644
--- a/third_party/abseil-cpp/absl/status/status.cc
+++ b/third_party/abseil-cpp/absl/status/status.cc
@@ -13,9 +13,13 @@
 // limitations under the License.
 #include "absl/status/status.h"
 
+#include <errno.h>
+
 #include <cassert>
+#include <utility>
 
 #include "absl/base/internal/raw_logging.h"
+#include "absl/base/internal/strerror.h"
 #include "absl/debugging/stacktrace.h"
 #include "absl/debugging/symbolize.h"
 #include "absl/status/status_payload_printer.h"
@@ -74,15 +78,17 @@ std::ostream& operator<<(std::ostream& os, StatusCode code) {
 
 namespace status_internal {
 
-static int FindPayloadIndexByUrl(const Payloads* payloads,
-                                 absl::string_view type_url) {
-  if (payloads == nullptr) return -1;
+static absl::optional<size_t> FindPayloadIndexByUrl(
+    const Payloads* payloads,
+    absl::string_view type_url) {
+  if (payloads == nullptr)
+    return absl::nullopt;
 
   for (size_t i = 0; i < payloads->size(); ++i) {
     if ((*payloads)[i].type_url == type_url) return i;
   }
 
-  return -1;
+  return absl::nullopt;
 }
 
 // Convert canonical code to a value known to this binary.
@@ -116,8 +122,10 @@ absl::StatusCode MapToLocalCode(int value) {
 absl::optional<absl::Cord> Status::GetPayload(
     absl::string_view type_url) const {
   const auto* payloads = GetPayloads();
-  int index = status_internal::FindPayloadIndexByUrl(payloads, type_url);
-  if (index != -1) return (*payloads)[index].payload;
+  absl::optional<size_t> index =
+      status_internal::FindPayloadIndexByUrl(payloads, type_url);
+  if (index.has_value())
+    return (*payloads)[index.value()].payload;
 
   return absl::nullopt;
 }
@@ -132,10 +140,10 @@ void Status::SetPayload(absl::string_view type_url, absl::Cord payload) {
     rep->payloads = absl::make_unique<status_internal::Payloads>();
   }
 
-  int index =
+  absl::optional<size_t> index =
       status_internal::FindPayloadIndexByUrl(rep->payloads.get(), type_url);
-  if (index != -1) {
-    (*rep->payloads)[index].payload = std::move(payload);
+  if (index.has_value()) {
+    (*rep->payloads)[index.value()].payload = std::move(payload);
     return;
   }
 
@@ -143,10 +151,11 @@ void Status::SetPayload(absl::string_view type_url, absl::Cord payload) {
 }
 
 bool Status::ErasePayload(absl::string_view type_url) {
-  int index = status_internal::FindPayloadIndexByUrl(GetPayloads(), type_url);
-  if (index != -1) {
+  absl::optional<size_t> index =
+      status_internal::FindPayloadIndexByUrl(GetPayloads(), type_url);
+  if (index.has_value()) {
     PrepareToModify();
-    GetPayloads()->erase(GetPayloads()->begin() + index);
+    GetPayloads()->erase(GetPayloads()->begin() + index.value());
     if (GetPayloads()->empty() && message().empty()) {
       // Special case: If this can be represented inlined, it MUST be
       // inlined (EqualsSlow depends on this behavior).
@@ -185,11 +194,16 @@ void Status::ForEachPayload(
 }
 
 const std::string* Status::EmptyString() {
-  static std::string* empty_string = new std::string();
-  return empty_string;
+  static union EmptyString {
+    std::string str;
+    ~EmptyString() {}
+  } empty = {{}};
+  return &empty.str;
 }
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 constexpr const char Status::kMovedFromString[];
+#endif
 
 const std::string* Status::MovedFromString() {
   static std::string* moved_from_string = new std::string(kMovedFromString);
@@ -440,5 +454,169 @@ bool IsUnknown(const Status& status) {
   return status.code() == absl::StatusCode::kUnknown;
 }
 
+StatusCode ErrnoToStatusCode(int error_number) {
+  switch (error_number) {
+    case 0:
+      return StatusCode::kOk;
+    case EINVAL:        // Invalid argument
+    case ENAMETOOLONG:  // Filename too long
+    case E2BIG:         // Argument list too long
+    case EDESTADDRREQ:  // Destination address required
+    case EDOM:          // Mathematics argument out of domain of function
+    case EFAULT:        // Bad address
+    case EILSEQ:        // Illegal byte sequence
+    case ENOPROTOOPT:   // Protocol not available
+    case ENOSTR:        // Not a STREAM
+    case ENOTSOCK:      // Not a socket
+    case ENOTTY:        // Inappropriate I/O control operation
+    case EPROTOTYPE:    // Protocol wrong type for socket
+    case ESPIPE:        // Invalid seek
+      return StatusCode::kInvalidArgument;
+    case ETIMEDOUT:  // Connection timed out
+    case ETIME:      // Timer expired
+      return StatusCode::kDeadlineExceeded;
+    case ENODEV:  // No such device
+    case ENOENT:  // No such file or directory
+#ifdef ENOMEDIUM
+    case ENOMEDIUM:  // No medium found
+#endif
+    case ENXIO:  // No such device or address
+    case ESRCH:  // No such process
+      return StatusCode::kNotFound;
+    case EEXIST:         // File exists
+    case EADDRNOTAVAIL:  // Address not available
+    case EALREADY:       // Connection already in progress
+#ifdef ENOTUNIQ
+    case ENOTUNIQ:  // Name not unique on network
+#endif
+      return StatusCode::kAlreadyExists;
+    case EPERM:   // Operation not permitted
+    case EACCES:  // Permission denied
+#ifdef ENOKEY
+    case ENOKEY:  // Required key not available
+#endif
+    case EROFS:  // Read only file system
+      return StatusCode::kPermissionDenied;
+    case ENOTEMPTY:   // Directory not empty
+    case EISDIR:      // Is a directory
+    case ENOTDIR:     // Not a directory
+    case EADDRINUSE:  // Address already in use
+    case EBADF:       // Invalid file descriptor
+#ifdef EBADFD
+    case EBADFD:  // File descriptor in bad state
+#endif
+    case EBUSY:    // Device or resource busy
+    case ECHILD:   // No child processes
+    case EISCONN:  // Socket is connected
+#ifdef EISNAM
+    case EISNAM:  // Is a named type file
+#endif
+#ifdef ENOTBLK
+    case ENOTBLK:  // Block device required
+#endif
+    case ENOTCONN:  // The socket is not connected
+    case EPIPE:     // Broken pipe
+#ifdef ESHUTDOWN
+    case ESHUTDOWN:  // Cannot send after transport endpoint shutdown
+#endif
+    case ETXTBSY:  // Text file busy
+#ifdef EUNATCH
+    case EUNATCH:  // Protocol driver not attached
+#endif
+      return StatusCode::kFailedPrecondition;
+    case ENOSPC:  // No space left on device
+#ifdef EDQUOT
+    case EDQUOT:  // Disk quota exceeded
+#endif
+    case EMFILE:   // Too many open files
+    case EMLINK:   // Too many links
+    case ENFILE:   // Too many open files in system
+    case ENOBUFS:  // No buffer space available
+    case ENODATA:  // No message is available on the STREAM read queue
+    case ENOMEM:   // Not enough space
+    case ENOSR:    // No STREAM resources
+#ifdef EUSERS
+    case EUSERS:  // Too many users
+#endif
+      return StatusCode::kResourceExhausted;
+#ifdef ECHRNG
+    case ECHRNG:  // Channel number out of range
+#endif
+    case EFBIG:      // File too large
+    case EOVERFLOW:  // Value too large to be stored in data type
+    case ERANGE:     // Result too large
+      return StatusCode::kOutOfRange;
+#ifdef ENOPKG
+    case ENOPKG:  // Package not installed
+#endif
+    case ENOSYS:        // Function not implemented
+    case ENOTSUP:       // Operation not supported
+    case EAFNOSUPPORT:  // Address family not supported
+#ifdef EPFNOSUPPORT
+    case EPFNOSUPPORT:  // Protocol family not supported
+#endif
+    case EPROTONOSUPPORT:  // Protocol not supported
+#ifdef ESOCKTNOSUPPORT
+    case ESOCKTNOSUPPORT:  // Socket type not supported
+#endif
+    case EXDEV:  // Improper link
+      return StatusCode::kUnimplemented;
+    case EAGAIN:  // Resource temporarily unavailable
+#ifdef ECOMM
+    case ECOMM:  // Communication error on send
+#endif
+    case ECONNREFUSED:  // Connection refused
+    case ECONNABORTED:  // Connection aborted
+    case ECONNRESET:    // Connection reset
+    case EINTR:         // Interrupted function call
+#ifdef EHOSTDOWN
+    case EHOSTDOWN:  // Host is down
+#endif
+    case EHOSTUNREACH:  // Host is unreachable
+    case ENETDOWN:      // Network is down
+    case ENETRESET:     // Connection aborted by network
+    case ENETUNREACH:   // Network unreachable
+    case ENOLCK:        // No locks available
+    case ENOLINK:       // Link has been severed
+#ifdef ENONET
+    case ENONET:  // Machine is not on the network
+#endif
+      return StatusCode::kUnavailable;
+    case EDEADLK:  // Resource deadlock avoided
+#ifdef ESTALE
+    case ESTALE:  // Stale file handle
+#endif
+      return StatusCode::kAborted;
+    case ECANCELED:  // Operation cancelled
+      return StatusCode::kCancelled;
+    default:
+      return StatusCode::kUnknown;
+  }
+}
+
+namespace {
+std::string MessageForErrnoToStatus(int error_number,
+                                    absl::string_view message) {
+  return absl::StrCat(message, ": ",
+                      absl::base_internal::StrError(error_number));
+}
+}  // namespace
+
+Status ErrnoToStatus(int error_number, absl::string_view message) {
+  return Status(ErrnoToStatusCode(error_number),
+                MessageForErrnoToStatus(error_number, message));
+}
+
+namespace status_internal {
+
+std::string* MakeCheckFailString(const absl::Status* status,
+                                 const char* prefix) {
+  return new std::string(
+      absl::StrCat(prefix, " (",
+                   status->ToString(StatusToStringMode::kWithEverything), ")"));
+}
+
+}  // namespace status_internal
+
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/status/status.h b/third_party/abseil-cpp/absl/status/status.h
index 39071e5f4a..4e8292fc0e 100644
--- a/third_party/abseil-cpp/absl/status/status.h
+++ b/third_party/abseil-cpp/absl/status/status.h
@@ -24,11 +24,11 @@
 //   * A set of helper functions for creating status codes and checking their
 //     values
 //
-// Within Google, `absl::Status` is the primary mechanism for gracefully
-// handling errors across API boundaries (and in particular across RPC
-// boundaries). Some of these errors may be recoverable, but others may not.
-// Most functions that can produce a recoverable error should be designed to
-// return an `absl::Status` (or `absl::StatusOr`).
+// Within Google, `absl::Status` is the primary mechanism for communicating
+// errors in C++, and is used to represent error state in both in-process
+// library calls as well as RPC calls. Some of these errors may be recoverable,
+// but others may not. Most functions that can produce a recoverable error
+// should be designed to return an `absl::Status` (or `absl::StatusOr`).
 //
 // Example:
 //
@@ -51,10 +51,10 @@
 #ifndef ABSL_STATUS_STATUS_H_
 #define ABSL_STATUS_STATUS_H_
 
-#include <iostream>
+#include <ostream>
 #include <string>
+#include <utility>
 
-#include "absl/container/inlined_vector.h"
 #include "absl/functional/function_ref.h"
 #include "absl/status/internal/status_internal.h"
 #include "absl/strings/cord.h"
@@ -469,8 +469,9 @@ class Status final {
 
   // Status::ok()
   //
-  // Returns `true` if `this->ok()`. Prefer checking for an OK status using this
-  // member function.
+  // Returns `true` if `this->code()` == `absl::StatusCode::kOk`,
+  // indicating the absence of an error.
+  // Prefer checking for an OK status using this member function.
   ABSL_MUST_USE_RESULT bool ok() const;
 
   // Status::code()
@@ -532,7 +533,7 @@ class Status final {
   //----------------------------------------------------------------------------
 
   // A payload may be attached to a status to provide additional context to an
-  // error that may not be satisifed by an existing `absl::StatusCode`.
+  // error that may not be satisfied by an existing `absl::StatusCode`.
   // Typically, this payload serves one of several purposes:
   //
   //   * It may provide more fine-grained semantic information about the error
@@ -612,10 +613,6 @@ class Status final {
   const status_internal::Payloads* GetPayloads() const;
   status_internal::Payloads* GetPayloads();
 
-  // Takes ownership of payload.
-  static uintptr_t NewRep(
-      absl::StatusCode code, absl::string_view msg,
-      std::unique_ptr<status_internal::Payloads> payload);
   static bool EqualsSlow(const absl::Status& a, const absl::Status& b);
 
   // MSVC 14.0 limitation requires the const.
@@ -741,6 +738,19 @@ Status UnavailableError(absl::string_view message);
 Status UnimplementedError(absl::string_view message);
 Status UnknownError(absl::string_view message);
 
+// ErrnoToStatusCode()
+//
+// Returns the StatusCode for `error_number`, which should be an `errno` value.
+// See https://en.cppreference.com/w/cpp/error/errno_macros and similar
+// references.
+absl::StatusCode ErrnoToStatusCode(int error_number);
+
+// ErrnoToStatus()
+//
+// Convenience function that creates a `absl::Status` using an `error_number`,
+// which should be an `errno` value.
+Status ErrnoToStatus(int error_number, absl::string_view message);
+
 //------------------------------------------------------------------------------
 // Implementation details follow
 //------------------------------------------------------------------------------
diff --git a/third_party/abseil-cpp/absl/status/status_test.cc b/third_party/abseil-cpp/absl/status/status_test.cc
index 1b038f6d98..89cce7dfd7 100644
--- a/third_party/abseil-cpp/absl/status/status_test.cc
+++ b/third_party/abseil-cpp/absl/status/status_test.cc
@@ -14,6 +14,8 @@
 
 #include "absl/status/status.h"
 
+#include <errno.h>
+
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/strings/str_cat.h"
@@ -485,4 +487,22 @@ TEST(Status, Swap) {
   test_swap(no_payload, with_payload);
   test_swap(with_payload, no_payload);
 }
+
+TEST(StatusErrno, ErrnoToStatusCode) {
+  EXPECT_EQ(absl::ErrnoToStatusCode(0), absl::StatusCode::kOk);
+
+  // Spot-check a few errno values.
+  EXPECT_EQ(absl::ErrnoToStatusCode(EINVAL),
+            absl::StatusCode::kInvalidArgument);
+  EXPECT_EQ(absl::ErrnoToStatusCode(ENOENT), absl::StatusCode::kNotFound);
+
+  // We'll pick a very large number so it hopefully doesn't collide to errno.
+  EXPECT_EQ(absl::ErrnoToStatusCode(19980927), absl::StatusCode::kUnknown);
+}
+
+TEST(StatusErrno, ErrnoToStatus) {
+  absl::Status status = absl::ErrnoToStatus(ENOENT, "Cannot open 'path'");
+  EXPECT_EQ(status.code(), absl::StatusCode::kNotFound);
+  EXPECT_EQ(status.message(), "Cannot open 'path': No such file or directory");
+}
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/status/statusor.h b/third_party/abseil-cpp/absl/status/statusor.h
index c051fbb3aa..a76e720153 100644
--- a/third_party/abseil-cpp/absl/status/statusor.h
+++ b/third_party/abseil-cpp/absl/status/statusor.h
@@ -106,7 +106,13 @@ class BadStatusOrAccess : public std::exception {
 
 // Returned StatusOr objects may not be ignored.
 template <typename T>
+#if ABSL_HAVE_CPP_ATTRIBUTE(nodiscard)
+// TODO(b/176172494): ABSL_MUST_USE_RESULT should expand to the more strict
+// [[nodiscard]]. For now, just use [[nodiscard]] directly when it is available.
+class [[nodiscard]] StatusOr;
+#else
 class ABSL_MUST_USE_RESULT StatusOr;
+#endif  // ABSL_HAVE_CPP_ATTRIBUTE(nodiscard)
 
 // absl::StatusOr<T>
 //
@@ -156,8 +162,8 @@ class ABSL_MUST_USE_RESULT StatusOr;
 // A `absl::StatusOr<T*>` can be constructed from a null pointer like any other
 // pointer value, and the result will be that `ok()` returns `true` and
 // `value()` returns `nullptr`. Checking the value of pointer in an
-// `absl::StatusOr<T>` generally requires a bit more care, to ensure both that a
-// value is present and that value is not null:
+// `absl::StatusOr<T*>` generally requires a bit more care, to ensure both that
+// a value is present and that value is not null:
 //
 //  StatusOr<std::unique_ptr<Foo>> result = FooFactory::MakeNewFoo(arg);
 //  if (!result.ok()) {
@@ -471,7 +477,7 @@ class StatusOr : private internal_statusor::StatusOrData<T>,
   // StatusOr<T>::ok()
   //
   // Returns whether or not this `absl::StatusOr<T>` holds a `T` value. This
-  // member function is analagous to `absl::Status::ok()` and should be used
+  // member function is analogous to `absl::Status::ok()` and should be used
   // similarly to check the status of return values.
   //
   // Example:
diff --git a/third_party/abseil-cpp/absl/status/statusor_test.cc b/third_party/abseil-cpp/absl/status/statusor_test.cc
index 7cae90e185..2902154367 100644
--- a/third_party/abseil-cpp/absl/status/statusor_test.cc
+++ b/third_party/abseil-cpp/absl/status/statusor_test.cc
@@ -1521,7 +1521,7 @@ static absl::StatusOr<int> MakeStatus() { return 100; }
 TEST(StatusOr, TestIgnoreError) { MakeStatus().IgnoreError(); }
 
 TEST(StatusOr, EqualityOperator) {
-  constexpr int kNumCases = 4;
+  constexpr size_t kNumCases = 4;
   std::array<absl::StatusOr<int>, kNumCases> group1 = {
       absl::StatusOr<int>(1), absl::StatusOr<int>(2),
       absl::StatusOr<int>(absl::InvalidArgumentError("msg")),
@@ -1530,8 +1530,8 @@ TEST(StatusOr, EqualityOperator) {
       absl::StatusOr<int>(1), absl::StatusOr<int>(2),
       absl::StatusOr<int>(absl::InvalidArgumentError("msg")),
       absl::StatusOr<int>(absl::InternalError("msg"))};
-  for (int i = 0; i < kNumCases; ++i) {
-    for (int j = 0; j < kNumCases; ++j) {
+  for (size_t i = 0; i < kNumCases; ++i) {
+    for (size_t j = 0; j < kNumCases; ++j) {
       if (i == j) {
         EXPECT_TRUE(group1[i] == group2[j]);
         EXPECT_FALSE(group1[i] != group2[j]);
diff --git a/third_party/abseil-cpp/absl/strings/BUILD.bazel b/third_party/abseil-cpp/absl/strings/BUILD.bazel
index 090fc58a2c..4794f4ca2a 100644
--- a/third_party/abseil-cpp/absl/strings/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/strings/BUILD.bazel
@@ -16,6 +16,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -36,11 +37,14 @@ cc_library(
         "internal/charconv_bigint.h",
         "internal/charconv_parse.cc",
         "internal/charconv_parse.h",
+        "internal/damerau_levenshtein_distance.cc",
         "internal/memutil.cc",
         "internal/memutil.h",
         "internal/stl_type_traits.h",
         "internal/str_join_internal.h",
         "internal/str_split_internal.h",
+        "internal/stringify_sink.cc",
+        "internal/stringify_sink.h",
         "match.cc",
         "numbers.cc",
         "str_cat.cc",
@@ -53,6 +57,7 @@ cc_library(
         "ascii.h",
         "charconv.h",
         "escaping.h",
+        "internal/damerau_levenshtein_distance.h",
         "internal/string_constant.h",
         "match.h",
         "numbers.h",
@@ -65,6 +70,7 @@ cc_library(
         "substitute.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":internal",
         "//absl/base",
@@ -95,6 +101,7 @@ cc_library(
         "internal/utf8.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:config",
         "//absl/base:core_headers",
@@ -176,6 +183,19 @@ cc_test(
 )
 
 cc_test(
+    name = "damerau_levenshtein_distance_test",
+    size = "small",
+    srcs = [
+        "internal/damerau_levenshtein_distance_test.cc",
+    ],
+    copts = ABSL_TEST_COPTS,
+    deps = [
+        "//absl/strings",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
     name = "memutil_benchmark",
     srcs = [
         "internal/memutil.h",
@@ -272,19 +292,23 @@ cc_library(
         "internal/cord_rep_btree_navigator.cc",
         "internal/cord_rep_btree_reader.cc",
         "internal/cord_rep_consume.cc",
+        "internal/cord_rep_crc.cc",
         "internal/cord_rep_ring.cc",
     ],
     hdrs = [
+        "internal/cord_data_edge.h",
         "internal/cord_internal.h",
         "internal/cord_rep_btree.h",
         "internal/cord_rep_btree_navigator.h",
         "internal/cord_rep_btree_reader.h",
         "internal/cord_rep_consume.h",
+        "internal/cord_rep_crc.h",
         "internal/cord_rep_flat.h",
         "internal/cord_rep_ring.h",
         "internal/cord_rep_ring_reader.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//visibility:private",
     ],
@@ -306,12 +330,16 @@ cc_library(
 )
 
 cc_test(
-    name = "cord_internal_test",
-    srcs = ["internal/cord_internal_test.cc"],
+    name = "cord_data_edge_test",
+    size = "small",
+    srcs = ["internal/cord_data_edge_test.cc"],
     copts = ABSL_TEST_COPTS,
     visibility = ["//visibility:private"],
     deps = [
         ":cord_internal",
+        ":cord_rep_test_util",
+        ":strings",
+        "//absl/base:config",
         "@com_google_googletest//:gtest_main",
     ],
 )
@@ -366,10 +394,25 @@ cc_test(
     ],
 )
 
+cc_test(
+    name = "cord_rep_crc_test",
+    size = "small",
+    srcs = ["internal/cord_rep_crc_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    visibility = ["//visibility:private"],
+    deps = [
+        ":cord_internal",
+        ":cord_rep_test_util",
+        "//absl/base:config",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
 cc_library(
     name = "cordz_update_tracker",
     hdrs = ["internal/cordz_update_tracker.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -392,11 +435,16 @@ cc_library(
     name = "cord",
     srcs = [
         "cord.cc",
+        "cord_analysis.cc",
+        "cord_analysis.h",
+        "cord_buffer.cc",
     ],
     hdrs = [
         "cord.h",
+        "cord_buffer.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":cord_internal",
         ":cordz_functions",
@@ -416,7 +464,9 @@ cc_library(
         "//absl/container:inlined_vector",
         "//absl/functional:function_ref",
         "//absl/meta:type_traits",
+        "//absl/numeric:bits",
         "//absl/types:optional",
+        "//absl/types:span",
     ],
 )
 
@@ -425,6 +475,7 @@ cc_library(
     srcs = ["internal/cordz_handle.cc"],
     hdrs = ["internal/cordz_handle.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -441,6 +492,7 @@ cc_library(
     srcs = ["internal/cordz_info.cc"],
     hdrs = ["internal/cordz_info.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -465,6 +517,7 @@ cc_library(
     name = "cordz_update_scope",
     hdrs = ["internal/cordz_update_scope.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -497,6 +550,7 @@ cc_library(
     srcs = ["internal/cordz_sample_token.cc"],
     hdrs = ["internal/cordz_sample_token.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -512,6 +566,7 @@ cc_library(
     srcs = ["internal/cordz_functions.cc"],
     hdrs = ["internal/cordz_functions.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -527,6 +582,7 @@ cc_library(
     name = "cordz_statistics",
     hdrs = ["internal/cordz_statistics.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -636,6 +692,7 @@ cc_library(
         "cord_test_helpers.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":cord",
         ":cord_internal",
@@ -649,6 +706,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/cord_rep_test_util.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":cord_internal",
         ":strings",
@@ -662,6 +720,7 @@ cc_library(
     testonly = 1,
     hdrs = ["cordz_test_helpers.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":cord",
         ":cord_internal",
@@ -677,6 +736,22 @@ cc_library(
 )
 
 cc_test(
+    name = "cord_buffer_test",
+    size = "small",
+    srcs = ["cord_buffer_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    visibility = ["//visibility:private"],
+    deps = [
+        ":cord",
+        ":cord_internal",
+        ":cord_rep_test_util",
+        "//absl/base:config",
+        "//absl/types:span",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
     name = "cord_test",
     size = "medium",
     srcs = ["cord_test.cc"],
@@ -689,12 +764,13 @@ cc_test(
         ":cordz_test_helpers",
         ":str_format",
         ":strings",
-        "//absl/base",
         "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/base:endian",
         "//absl/base:raw_logging_internal",
         "//absl/container:fixed_array",
+        "//absl/hash",
+        "//absl/log",
         "//absl/random",
         "@com_google_googletest//:gtest_main",
     ],
@@ -710,7 +786,6 @@ cc_test(
         "no_test_android_arm",
         "no_test_android_arm64",
         "no_test_android_x86",
-        "no_test_darwin_x86_64",
         "no_test_ios_x86_64",
         "no_test_loonix",
         "no_test_msvc_x64",
@@ -734,22 +809,6 @@ cc_test(
 )
 
 cc_test(
-    name = "cord_rep_consume_test",
-    size = "medium",
-    srcs = ["internal/cord_rep_consume_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":cord_internal",
-        ":strings",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/debugging:leak_check",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
     name = "cord_ring_test",
     size = "medium",
     srcs = ["cord_ring_test.cc"],
@@ -921,8 +980,8 @@ cc_test(
     copts = ABSL_TEST_COPTS,
     visibility = ["//visibility:private"],
     deps = [
+        ":str_format",
         ":strings",
-        "//absl/base:core_headers",
         "@com_google_googletest//:gtest_main",
     ],
 )
@@ -1070,6 +1129,7 @@ cc_library(
         "str_format.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":str_format_internal",
     ],
@@ -1095,6 +1155,7 @@ cc_library(
         "internal/str_format/parser.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         ":strings",
@@ -1107,6 +1168,7 @@ cc_library(
         "//absl/numeric:representation",
         "//absl/types:optional",
         "//absl/types:span",
+        "//absl/utility",
     ],
 )
 
@@ -1119,7 +1181,6 @@ cc_test(
         ":cord",
         ":str_format",
         ":strings",
-        "//absl/base:core_headers",
         "@com_google_googletest//:gtest_main",
     ],
 )
@@ -1182,6 +1243,7 @@ cc_test(
     deps = [
         ":str_format_internal",
         ":strings",
+        "//absl/base:core_headers",
         "//absl/base:raw_logging_internal",
         "//absl/types:optional",
         "@com_google_googletest//:gtest_main",
@@ -1217,6 +1279,7 @@ cc_library(
     testonly = True,
     srcs = ["internal/pow10_helper.cc"],
     hdrs = ["internal/pow10_helper.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = ["//absl/base:config"],
 )
@@ -1232,3 +1295,18 @@ cc_test(
         "@com_google_googletest//:gtest_main",
     ],
 )
+
+cc_binary(
+    name = "atod_manual_test",
+    testonly = 1,
+    srcs = ["atod_manual_test.cc"],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = ["//visibility:private"],
+    deps = [
+        ":str_format",
+        ":strings",
+        "//absl/base",
+        "//absl/types:optional",
+    ],
+)
diff --git a/third_party/abseil-cpp/absl/strings/BUILD.gn b/third_party/abseil-cpp/absl/strings/BUILD.gn
new file mode 100644
index 0000000000..6b01583fd7
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/BUILD.gn
@@ -0,0 +1,563 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build_overrides/build.gni")
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("strings") {
+  sources = [
+    "ascii.cc",
+    "charconv.cc",
+    "escaping.cc",
+    "internal/charconv_bigint.cc",
+    "internal/charconv_bigint.h",
+    "internal/charconv_parse.cc",
+    "internal/charconv_parse.h",
+    "internal/damerau_levenshtein_distance.cc",
+    "internal/memutil.cc",
+    "internal/memutil.h",
+    "internal/stl_type_traits.h",
+    "internal/str_join_internal.h",
+    "internal/str_split_internal.h",
+    "internal/stringify_sink.cc",
+    "internal/stringify_sink.h",
+    "match.cc",
+    "numbers.cc",
+    "str_cat.cc",
+    "str_replace.cc",
+    "str_split.cc",
+    "string_view.cc",
+    "substitute.cc",
+  ]
+  public = [
+    "ascii.h",
+    "charconv.h",
+    "escaping.h",
+    "internal/damerau_levenshtein_distance.h",
+    "internal/string_constant.h",
+    "match.h",
+    "numbers.h",
+    "str_cat.h",
+    "str_join.h",
+    "str_replace.h",
+    "str_split.h",
+    "string_view.h",
+    "strip.h",
+    "substitute.h",
+  ]
+  deps = [
+    ":internal",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+  ]
+}
+
+absl_source_set("internal") {
+  sources = [
+    "internal/escaping.cc",
+    "internal/ostringstream.cc",
+    "internal/utf8.cc",
+  ]
+  public = [
+    "internal/char_map.h",
+    "internal/escaping.h",
+    "internal/ostringstream.h",
+    "internal/resize_uninitialized.h",
+    "internal/utf8.h",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("str_format") {
+  public = [ "str_format.h" ]
+  deps = [ ":str_format_internal" ]
+}
+
+absl_source_set("str_format_internal") {
+  sources = [
+    "internal/str_format/arg.cc",
+    "internal/str_format/bind.cc",
+    "internal/str_format/extension.cc",
+    "internal/str_format/float_conversion.cc",
+    "internal/str_format/output.cc",
+    "internal/str_format/parser.cc",
+  ]
+  public = [
+    "internal/str_format/arg.h",
+    "internal/str_format/bind.h",
+    "internal/str_format/checker.h",
+    "internal/str_format/extension.h",
+    "internal/str_format/float_conversion.h",
+    "internal/str_format/output.h",
+    "internal/str_format/parser.h",
+  ]
+  visibility = [ ":*" ]
+  deps = [
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/functional:function_ref",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+    "//third_party/abseil-cpp/absl/numeric:representation",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/types:span",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("cord_internal") {
+  sources = [
+    "internal/cord_internal.cc",
+    "internal/cord_rep_btree.cc",
+    "internal/cord_rep_btree_navigator.cc",
+    "internal/cord_rep_btree_reader.cc",
+    "internal/cord_rep_consume.cc",
+    "internal/cord_rep_crc.cc",
+    "internal/cord_rep_ring.cc",
+  ]
+  public = [
+    "internal/cord_data_edge.h",
+    "internal/cord_internal.h",
+    "internal/cord_rep_btree.h",
+    "internal/cord_rep_btree_navigator.h",
+    "internal/cord_rep_btree_reader.h",
+    "internal/cord_rep_consume.h",
+    "internal/cord_rep_crc.h",
+    "internal/cord_rep_flat.h",
+    "internal/cord_rep_ring.h",
+    "internal/cord_rep_ring_reader.h",
+  ]
+  visibility = [ ":*" ]
+  deps = [
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+    "//third_party/abseil-cpp/absl/container:compressed_tuple",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/container:layout",
+    "//third_party/abseil-cpp/absl/functional:function_ref",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_test("cord_data_edge_test") {
+  sources = [ "internal/cord_data_edge_test.cc" ]
+  deps = [
+    ":cord_internal",
+    ":cord_rep_test_util",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_test("cord_rep_btree_test") {
+  sources = [ "internal/cord_rep_btree_test.cc" ]
+  deps = [
+    ":cord_internal",
+    ":cord_rep_test_util",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/cleanup",
+  ]
+}
+
+absl_test("cord_rep_btree_reader_test") {
+  sources = [ "internal/cord_rep_btree_reader_test.cc" ]
+  deps = [
+    ":cord",
+    ":cord_internal",
+    ":cord_rep_test_util",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_test("cord_rep_crc_test") {
+  sources = [ "internal/cord_rep_crc_test.cc" ]
+  deps = [
+    ":cord_internal",
+    ":cord_rep_test_util",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("cordz_update_tracker") {
+  public = [ "internal/cordz_update_tracker.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_test("cordz_update_tracker_test") {
+  sources = [ "internal/cordz_update_tracker_test.cc" ]
+  deps = [
+    ":cordz_update_tracker",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
+
+absl_source_set("cord") {
+  sources = [
+    "cord.cc",
+    "cord_analysis.cc",
+    "cord_analysis.h",
+    "cord_buffer.cc",
+  ]
+  public = [
+    "cord.h",
+    "cord_buffer.h",
+  ]
+  deps = [
+    ":cord_internal",
+    ":cordz_functions",
+    ":cordz_info",
+    ":cordz_statistics",
+    ":cordz_update_scope",
+    ":cordz_update_tracker",
+    ":internal",
+    ":str_format",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:endian",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/container:fixed_array",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/functional:function_ref",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/numeric:bits",
+    "//third_party/abseil-cpp/absl/types:optional",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("cordz_handle") {
+  sources = [ "internal/cordz_handle.cc" ]
+  public = [ "internal/cordz_handle.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/synchronization",
+  ]
+}
+
+absl_source_set("cordz_info") {
+  sources = [ "internal/cordz_info.cc" ]
+  public = [ "internal/cordz_info.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [
+    ":cord_internal",
+    ":cordz_functions",
+    ":cordz_handle",
+    ":cordz_statistics",
+    ":cordz_update_tracker",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/container:inlined_vector",
+    "//third_party/abseil-cpp/absl/debugging:stacktrace",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_source_set("cordz_update_scope") {
+  public = [ "internal/cordz_update_scope.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [
+    ":cord_internal",
+    ":cordz_info",
+    ":cordz_update_tracker",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_test("cordz_update_scope_test") {
+  sources = [ "internal/cordz_update_scope_test.cc" ]
+  deps = [
+    ":cord_internal",
+    ":cordz_info",
+    ":cordz_test_helpers",
+    ":cordz_update_scope",
+    ":cordz_update_tracker",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("cordz_sample_token") {
+  sources = [ "internal/cordz_sample_token.cc" ]
+  public = [ "internal/cordz_sample_token.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [
+    ":cordz_handle",
+    ":cordz_info",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("cordz_functions") {
+  sources = [ "internal/cordz_functions.cc" ]
+  public = [ "internal/cordz_functions.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/profiling:exponential_biased",
+  ]
+}
+
+absl_source_set("cordz_statistics") {
+  public = [ "internal/cordz_statistics.h" ]
+  visibility = [ "//third_party/abseil-cpp/*" ]
+  deps = [
+    ":cordz_update_tracker",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_test("cordz_functions_test") {
+  sources = [ "internal/cordz_functions_test.cc" ]
+  deps = [
+    ":cordz_functions",
+    ":cordz_test_helpers",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+# TODO(b/186638384): Re-enable when random is compilable on win32-archive-rel bot
+# absl_test("cordz_handle_test") {
+#   sources = [ "internal/cordz_handle_test.cc" ]
+#   deps = [
+#     ":cordz_handle",
+#     "//third_party/abseil-cpp/absl/base:config",
+#     "//third_party/abseil-cpp/absl/memory",
+#     "//third_party/abseil-cpp/absl/random",
+#     "//third_party/abseil-cpp/absl/random:distributions",
+#     "//third_party/abseil-cpp/absl/synchronization",
+#     "//third_party/abseil-cpp/absl/synchronization:thread_pool",
+#     "//third_party/abseil-cpp/absl/time",
+#   ]
+# }
+
+absl_test("cordz_info_test") {
+  sources = [ "internal/cordz_info_test.cc" ]
+  deps = [
+    ":cord_internal",
+    ":cordz_handle",
+    ":cordz_info",
+    ":cordz_statistics",
+    ":cordz_test_helpers",
+    ":cordz_update_tracker",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/debugging:stacktrace",
+    "//third_party/abseil-cpp/absl/debugging:symbolize",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_test("cordz_info_statistics_test") {
+  sources = [ "internal/cordz_info_statistics_test.cc" ]
+  deps = [
+    ":cord",
+    ":cord_internal",
+    ":cordz_info",
+    ":cordz_sample_token",
+    ":cordz_statistics",
+    ":cordz_update_scope",
+    ":cordz_update_tracker",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/synchronization",
+    "//third_party/abseil-cpp/absl/synchronization:thread_pool",
+  ]
+}
+
+# TODO(b/186638384): Re-enable when random is compilable on win32-archive-rel bot
+# absl_test("cordz_sample_token_test") {
+#   sources = [ "internal/cordz_sample_token_test.cc" ]
+#   deps = [
+#     ":cord_internal",
+#     ":cordz_handle",
+#     ":cordz_info",
+#     ":cordz_sample_token",
+#     ":cordz_test_helpers",
+#     "//third_party/abseil-cpp/absl/base:config",
+#     "//third_party/abseil-cpp/absl/memory",
+#     "//third_party/abseil-cpp/absl/random",
+#     "//third_party/abseil-cpp/absl/synchronization",
+#     "//third_party/abseil-cpp/absl/synchronization:thread_pool",
+#     "//third_party/abseil-cpp/absl/time",
+#   ]
+# }
+
+absl_source_set("cord_test_helpers") {
+  testonly = true
+  public = [ "cord_test_helpers.h" ]
+  deps = [
+    ":cord",
+    ":cord_internal",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+}
+
+absl_source_set("cord_rep_test_util") {
+  testonly = true
+  public = [ "internal/cord_rep_test_util.h" ]
+  deps = [
+    ":cord_internal",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("cordz_test_helpers") {
+  testonly = true
+  public = [ "cordz_test_helpers.h" ]
+  deps = [
+    ":cord",
+    ":cord_internal",
+    ":cordz_info",
+    ":cordz_sample_token",
+    ":cordz_statistics",
+    ":cordz_update_tracker",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/googletest:gtest",
+  ]
+}
+
+# TODO(b/186638384): Re-enable when random is compilable on win32-archive-rel bot
+# absl_test("cord_test") {
+#   public = [ "cord_test.cc" ]
+#   deps = [
+#     ":cord",
+#     ":cord_test_helpers",
+#     ":cordz_functions",
+#     ":cordz_test_helpers",
+#     ":str_format",
+#     ":strings",
+#     "//third_party/abseil-cpp/absl/base:config",
+#     "//third_party/abseil-cpp/absl/base:core_headers",
+#     "//third_party/abseil-cpp/absl/base:endian",
+#     "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+#     "//third_party/abseil-cpp/absl/container:fixed_array",
+#     "//third_party/abseil-cpp/absl/hash",
+#     "//third_party/abseil-cpp/absl/log",
+#     "//third_party/abseil-cpp/absl/random",
+#   ]
+# }
+
+absl_test("cord_buffer_test") {
+  public = [ "cord_buffer_test.cc" ]
+  deps = [
+    ":cord",
+    ":cord_internal",
+    ":cord_rep_test_util",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/types:span",
+  ]
+}
+
+absl_test("cordz_test") {
+  sources = [ "cordz_test.cc" ]
+  deps = [
+    ":cord",
+    ":cord_test_helpers",
+    ":cordz_functions",
+    ":cordz_info",
+    ":cordz_sample_token",
+    ":cordz_statistics",
+    ":cordz_test_helpers",
+    ":cordz_update_tracker",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
+
+absl_source_set("pow10_helper") {
+  testonly = true
+  sources = [ "internal/pow10_helper.cc" ]
+  public = [ "internal/pow10_helper.h" ]
+  visibility = [ ":*" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_test("ascii_test") {
+  sources = [ "ascii_test.cc" ]
+  deps = [
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+}
+
+absl_test("damerau_levenshtein_distance_test") {
+  sources = [ "internal/damerau_levenshtein_distance_test.cc" ]
+  deps = [ ":strings" ]
+}
+
+absl_test("match_test") {
+  sources = [ "match_test.cc" ]
+  deps = [ ":strings" ]
+}
+
+absl_test("str_replace_test") {
+  sources = [ "str_replace_test.cc" ]
+  deps = [ ":strings" ]
+}
+
+absl_test("string_view_test") {
+  sources = [ "string_view_test.cc" ]
+  deps = [
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+  ]
+}
+
+absl_test("cord_rep_btree_navigator_test") {
+  sources = [ "internal/cord_rep_btree_navigator_test.cc" ]
+  deps = [
+    ":cord_internal",
+    ":cord_rep_test_util",
+    ":strings",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/strings/CMakeLists.txt b/third_party/abseil-cpp/absl/strings/CMakeLists.txt
index d6801fe6fd..87b1a78f68 100644
--- a/third_party/abseil-cpp/absl/strings/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/strings/CMakeLists.txt
@@ -21,6 +21,7 @@ absl_cc_library(
     "ascii.h"
     "charconv.h"
     "escaping.h"
+    "internal/damerau_levenshtein_distance.h"
     "internal/string_constant.h"
     "match.h"
     "numbers.h"
@@ -39,8 +40,11 @@ absl_cc_library(
     "internal/charconv_bigint.h"
     "internal/charconv_parse.cc"
     "internal/charconv_parse.h"
+    "internal/damerau_levenshtein_distance.cc"
     "internal/memutil.cc"
     "internal/memutil.h"
+    "internal/stringify_sink.h"
+    "internal/stringify_sink.cc"
     "internal/stl_type_traits.h"
     "internal/str_join_internal.h"
     "internal/str_split_internal.h"
@@ -68,6 +72,7 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     strings_internal
@@ -133,6 +138,19 @@ absl_cc_test(
 
 absl_cc_test(
   NAME
+    damerau_levenshtein_distance_test
+  SRCS
+    "internal/damerau_levenshtein_distance_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  DEPS
+    absl::strings
+    absl::base
+    GTest::gmock_main
+)
+
+absl_cc_test(
+  NAME
     memutil_test
   SRCS
     "internal/memutil.h"
@@ -280,6 +298,7 @@ absl_cc_test(
     ${ABSL_TEST_COPTS}
   DEPS
     absl::strings
+    absl::str_format
     absl::core_headers
     GTest::gmock_main
 )
@@ -385,6 +404,7 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     str_format_internal
@@ -412,6 +432,7 @@ absl_cc_library(
     absl::core_headers
     absl::numeric_representation
     absl::type_traits
+    absl::utility
     absl::int128
     absl::span
 )
@@ -492,6 +513,7 @@ absl_cc_test(
   DEPS
     absl::strings
     absl::str_format_internal
+    absl::core_headers
     absl::raw_logging_internal
     absl::int128
     GTest::gmock_main
@@ -523,6 +545,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     pow10_helper
@@ -550,14 +573,17 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cord_internal
   HDRS
+    "internal/cord_data_edge.h"
     "internal/cord_internal.h"
     "internal/cord_rep_btree.h"
     "internal/cord_rep_btree_navigator.h"
     "internal/cord_rep_btree_reader.h"
+    "internal/cord_rep_crc.h"
     "internal/cord_rep_consume.h"
     "internal/cord_rep_flat.h"
     "internal/cord_rep_ring.h"
@@ -567,6 +593,7 @@ absl_cc_library(
     "internal/cord_rep_btree.cc"
     "internal/cord_rep_btree_navigator.cc"
     "internal/cord_rep_btree_reader.cc"
+    "internal/cord_rep_crc.cc"
     "internal/cord_rep_consume.cc"
     "internal/cord_rep_ring.cc"
   COPTS
@@ -585,6 +612,7 @@ absl_cc_library(
     absl::type_traits
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_update_tracker
@@ -611,6 +639,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_functions
@@ -639,6 +668,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_statistics
@@ -653,6 +683,7 @@ absl_cc_library(
     absl::synchronization
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_handle
@@ -686,6 +717,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_info
@@ -753,6 +785,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_sample_token
@@ -791,6 +824,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_update_scope
@@ -829,8 +863,12 @@ absl_cc_library(
     cord
   HDRS
     "cord.h"
+    "cord_buffer.h"
   SRCS
     "cord.cc"
+    "cord_analysis.cc"
+    "cord_analysis.h"
+    "cord_buffer.cc"
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
@@ -848,11 +886,13 @@ absl_cc_library(
     absl::inlined_vector
     absl::optional
     absl::raw_logging_internal
+    absl::span
     absl::strings
     absl::type_traits
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cord_rep_test_util
@@ -881,8 +921,10 @@ absl_cc_library(
     absl::cord_internal
     absl::strings
   TESTONLY
+  PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     cordz_test_helpers
@@ -920,6 +962,7 @@ absl_cc_test(
     absl::cordz_test_helpers
     absl::core_headers
     absl::endian
+    absl::hash
     absl::random_random
     absl::raw_logging_internal
     absl::fixed_array
@@ -928,36 +971,23 @@ absl_cc_test(
 
 absl_cc_test(
   NAME
-    cord_rep_consume_test
+    cord_data_edge_test
   SRCS
-    "internal/cord_rep_consume_test.cc"
+    "internal/cord_data_edge_test.cc"
   COPTS
     ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::config
     absl::cord_internal
+    absl::cord_rep_test_util
     absl::core_headers
-    absl::function_ref
-    absl::raw_logging_internal
     absl::strings
     GTest::gmock_main
 )
 
 absl_cc_test(
   NAME
-    cord_internal_test
-  SRCS
-    "internal/cord_internal_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::cord_internal
-    GTest::gmock_main
-)
-
-absl_cc_test(
-  NAME
     cord_rep_btree_test
   SRCS
     "internal/cord_rep_btree_test.cc"
@@ -1013,6 +1043,20 @@ absl_cc_test(
 
 absl_cc_test(
   NAME
+    cord_rep_crc_test
+  SRCS
+    "internal/cord_rep_crc_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  DEPS
+    absl::config
+    absl::cord_internal
+    absl::cord_rep_test_util
+    GTest::gmock_main
+)
+
+absl_cc_test(
+  NAME
     cord_ring_test
   SRCS
     "cord_ring_test.cc"
diff --git a/third_party/abseil-cpp/absl/strings/ascii.cc b/third_party/abseil-cpp/absl/strings/ascii.cc
index 93bb03e958..868df2d102 100644
--- a/third_party/abseil-cpp/absl/strings/ascii.cc
+++ b/third_party/abseil-cpp/absl/strings/ascii.cc
@@ -157,13 +157,13 @@ ABSL_DLL const char kToUpper[256] = {
 
 void AsciiStrToLower(std::string* s) {
   for (auto& ch : *s) {
-    ch = absl::ascii_tolower(ch);
+    ch = absl::ascii_tolower(static_cast<unsigned char>(ch));
   }
 }
 
 void AsciiStrToUpper(std::string* s) {
   for (auto& ch : *s) {
-    ch = absl::ascii_toupper(ch);
+    ch = absl::ascii_toupper(static_cast<unsigned char>(ch));
   }
 }
 
@@ -183,17 +183,17 @@ void RemoveExtraAsciiWhitespace(std::string* str) {
   for (; input_it < input_end; ++input_it) {
     if (is_ws) {
       // Consecutive whitespace?  Keep only the last.
-      is_ws = absl::ascii_isspace(*input_it);
+      is_ws = absl::ascii_isspace(static_cast<unsigned char>(*input_it));
       if (is_ws) --output_it;
     } else {
-      is_ws = absl::ascii_isspace(*input_it);
+      is_ws = absl::ascii_isspace(static_cast<unsigned char>(*input_it));
     }
 
     *output_it = *input_it;
     ++output_it;
   }
 
-  str->erase(output_it - &(*str)[0]);
+  str->erase(static_cast<size_t>(output_it - &(*str)[0]));
 }
 
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/strings/ascii.h b/third_party/abseil-cpp/absl/strings/ascii.h
index b46bc71f35..42eadaea6c 100644
--- a/third_party/abseil-cpp/absl/strings/ascii.h
+++ b/third_party/abseil-cpp/absl/strings/ascii.h
@@ -133,7 +133,7 @@ inline bool ascii_isdigit(unsigned char c) { return c >= '0' && c <= '9'; }
 
 // ascii_isprint()
 //
-// Determines whether the given character is printable, including whitespace.
+// Determines whether the given character is printable, including spaces.
 inline bool ascii_isprint(unsigned char c) { return c >= 32 && c < 127; }
 
 // ascii_isgraph()
@@ -197,7 +197,7 @@ ABSL_MUST_USE_RESULT inline std::string AsciiStrToUpper(absl::string_view s) {
 ABSL_MUST_USE_RESULT inline absl::string_view StripLeadingAsciiWhitespace(
     absl::string_view str) {
   auto it = std::find_if_not(str.begin(), str.end(), absl::ascii_isspace);
-  return str.substr(it - str.begin());
+  return str.substr(static_cast<size_t>(it - str.begin()));
 }
 
 // Strips in place whitespace from the beginning of the given string.
@@ -211,13 +211,13 @@ inline void StripLeadingAsciiWhitespace(std::string* str) {
 ABSL_MUST_USE_RESULT inline absl::string_view StripTrailingAsciiWhitespace(
     absl::string_view str) {
   auto it = std::find_if_not(str.rbegin(), str.rend(), absl::ascii_isspace);
-  return str.substr(0, str.rend() - it);
+  return str.substr(0, static_cast<size_t>(str.rend() - it));
 }
 
 // Strips in place whitespace from the end of the given string
 inline void StripTrailingAsciiWhitespace(std::string* str) {
   auto it = std::find_if_not(str->rbegin(), str->rend(), absl::ascii_isspace);
-  str->erase(str->rend() - it);
+  str->erase(static_cast<size_t>(str->rend() - it));
 }
 
 // Returns absl::string_view with whitespace stripped from both ends of the
diff --git a/third_party/abseil-cpp/absl/strings/ascii_test.cc b/third_party/abseil-cpp/absl/strings/ascii_test.cc
index 83af7825e1..dfed114c21 100644
--- a/third_party/abseil-cpp/absl/strings/ascii_test.cc
+++ b/third_party/abseil-cpp/absl/strings/ascii_test.cc
@@ -27,103 +27,99 @@ namespace {
 
 TEST(AsciiIsFoo, All) {
   for (int i = 0; i < 256; i++) {
-    if ((i >= 'a' && i <= 'z') || (i >= 'A' && i <= 'Z'))
-      EXPECT_TRUE(absl::ascii_isalpha(i)) << ": failed on " << i;
+    const auto c = static_cast<unsigned char>(i);
+    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
+      EXPECT_TRUE(absl::ascii_isalpha(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isalpha(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isalpha(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
-    if ((i >= '0' && i <= '9'))
-      EXPECT_TRUE(absl::ascii_isdigit(i)) << ": failed on " << i;
+    const auto c = static_cast<unsigned char>(i);
+    if ((c >= '0' && c <= '9'))
+      EXPECT_TRUE(absl::ascii_isdigit(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isdigit(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isdigit(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
-    if (absl::ascii_isalpha(i) || absl::ascii_isdigit(i))
-      EXPECT_TRUE(absl::ascii_isalnum(i)) << ": failed on " << i;
+    const auto c = static_cast<unsigned char>(i);
+    if (absl::ascii_isalpha(c) || absl::ascii_isdigit(c))
+      EXPECT_TRUE(absl::ascii_isalnum(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isalnum(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isalnum(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i != '\0' && strchr(" \r\n\t\v\f", i))
-      EXPECT_TRUE(absl::ascii_isspace(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_isspace(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isspace(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isspace(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i >= 32 && i < 127)
-      EXPECT_TRUE(absl::ascii_isprint(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_isprint(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isprint(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isprint(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
-    if (absl::ascii_isprint(i) && !absl::ascii_isspace(i) &&
-        !absl::ascii_isalnum(i))
-      EXPECT_TRUE(absl::ascii_ispunct(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_ispunct(i)) << ": failed on " << i;
+    const auto c = static_cast<unsigned char>(i);
+    if (absl::ascii_isprint(c) && !absl::ascii_isspace(c) &&
+        !absl::ascii_isalnum(c)) {
+      EXPECT_TRUE(absl::ascii_ispunct(c)) << ": failed on " << c;
+    } else {
+      EXPECT_TRUE(!absl::ascii_ispunct(c)) << ": failed on " << c;
+    }
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i == ' ' || i == '\t')
-      EXPECT_TRUE(absl::ascii_isblank(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_isblank(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isblank(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isblank(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i < 32 || i == 127)
-      EXPECT_TRUE(absl::ascii_iscntrl(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_iscntrl(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_iscntrl(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_iscntrl(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
-    if (absl::ascii_isdigit(i) || (i >= 'A' && i <= 'F') ||
-        (i >= 'a' && i <= 'f'))
-      EXPECT_TRUE(absl::ascii_isxdigit(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isxdigit(i)) << ": failed on " << i;
+    const auto c = static_cast<unsigned char>(i);
+    if (absl::ascii_isdigit(c) || (i >= 'A' && i <= 'F') ||
+        (i >= 'a' && i <= 'f')) {
+      EXPECT_TRUE(absl::ascii_isxdigit(c)) << ": failed on " << c;
+    } else {
+      EXPECT_TRUE(!absl::ascii_isxdigit(c)) << ": failed on " << c;
+    }
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i > 32 && i < 127)
-      EXPECT_TRUE(absl::ascii_isgraph(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_isgraph(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isgraph(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isgraph(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i >= 'A' && i <= 'Z')
-      EXPECT_TRUE(absl::ascii_isupper(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_isupper(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_isupper(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_isupper(c)) << ": failed on " << c;
   }
   for (int i = 0; i < 256; i++) {
+    const auto c = static_cast<unsigned char>(i);
     if (i >= 'a' && i <= 'z')
-      EXPECT_TRUE(absl::ascii_islower(i)) << ": failed on " << i;
+      EXPECT_TRUE(absl::ascii_islower(c)) << ": failed on " << c;
     else
-      EXPECT_TRUE(!absl::ascii_islower(i)) << ": failed on " << i;
+      EXPECT_TRUE(!absl::ascii_islower(c)) << ": failed on " << c;
   }
-  for (int i = 0; i < 128; i++) {
-    EXPECT_TRUE(absl::ascii_isascii(i)) << ": failed on " << i;
+  for (unsigned char c = 0; c < 128; c++) {
+    EXPECT_TRUE(absl::ascii_isascii(c)) << ": failed on " << c;
   }
   for (int i = 128; i < 256; i++) {
-    EXPECT_TRUE(!absl::ascii_isascii(i)) << ": failed on " << i;
-  }
-
-  // The official is* functions don't accept negative signed chars, but
-  // our absl::ascii_is* functions do.
-  for (int i = 0; i < 256; i++) {
-    signed char sc = static_cast<signed char>(static_cast<unsigned char>(i));
-    EXPECT_EQ(absl::ascii_isalpha(i), absl::ascii_isalpha(sc)) << i;
-    EXPECT_EQ(absl::ascii_isdigit(i), absl::ascii_isdigit(sc)) << i;
-    EXPECT_EQ(absl::ascii_isalnum(i), absl::ascii_isalnum(sc)) << i;
-    EXPECT_EQ(absl::ascii_isspace(i), absl::ascii_isspace(sc)) << i;
-    EXPECT_EQ(absl::ascii_ispunct(i), absl::ascii_ispunct(sc)) << i;
-    EXPECT_EQ(absl::ascii_isblank(i), absl::ascii_isblank(sc)) << i;
-    EXPECT_EQ(absl::ascii_iscntrl(i), absl::ascii_iscntrl(sc)) << i;
-    EXPECT_EQ(absl::ascii_isxdigit(i), absl::ascii_isxdigit(sc)) << i;
-    EXPECT_EQ(absl::ascii_isprint(i), absl::ascii_isprint(sc)) << i;
-    EXPECT_EQ(absl::ascii_isgraph(i), absl::ascii_isgraph(sc)) << i;
-    EXPECT_EQ(absl::ascii_isupper(i), absl::ascii_isupper(sc)) << i;
-    EXPECT_EQ(absl::ascii_islower(i), absl::ascii_islower(sc)) << i;
-    EXPECT_EQ(absl::ascii_isascii(i), absl::ascii_isascii(sc)) << i;
+    const auto c = static_cast<unsigned char>(i);
+    EXPECT_TRUE(!absl::ascii_isascii(c)) << ": failed on " << c;
   }
 }
 
@@ -137,19 +133,20 @@ TEST(AsciiIsFoo, SameAsIsFoo) {
 #endif
 
   for (int i = 0; i < 256; i++) {
-    EXPECT_EQ(isalpha(i) != 0, absl::ascii_isalpha(i)) << i;
-    EXPECT_EQ(isdigit(i) != 0, absl::ascii_isdigit(i)) << i;
-    EXPECT_EQ(isalnum(i) != 0, absl::ascii_isalnum(i)) << i;
-    EXPECT_EQ(isspace(i) != 0, absl::ascii_isspace(i)) << i;
-    EXPECT_EQ(ispunct(i) != 0, absl::ascii_ispunct(i)) << i;
-    EXPECT_EQ(isblank(i) != 0, absl::ascii_isblank(i)) << i;
-    EXPECT_EQ(iscntrl(i) != 0, absl::ascii_iscntrl(i)) << i;
-    EXPECT_EQ(isxdigit(i) != 0, absl::ascii_isxdigit(i)) << i;
-    EXPECT_EQ(isprint(i) != 0, absl::ascii_isprint(i)) << i;
-    EXPECT_EQ(isgraph(i) != 0, absl::ascii_isgraph(i)) << i;
-    EXPECT_EQ(isupper(i) != 0, absl::ascii_isupper(i)) << i;
-    EXPECT_EQ(islower(i) != 0, absl::ascii_islower(i)) << i;
-    EXPECT_EQ(isascii(i) != 0, absl::ascii_isascii(i)) << i;
+    const auto c = static_cast<unsigned char>(i);
+    EXPECT_EQ(isalpha(c) != 0, absl::ascii_isalpha(c)) << c;
+    EXPECT_EQ(isdigit(c) != 0, absl::ascii_isdigit(c)) << c;
+    EXPECT_EQ(isalnum(c) != 0, absl::ascii_isalnum(c)) << c;
+    EXPECT_EQ(isspace(c) != 0, absl::ascii_isspace(c)) << c;
+    EXPECT_EQ(ispunct(c) != 0, absl::ascii_ispunct(c)) << c;
+    EXPECT_EQ(isblank(c) != 0, absl::ascii_isblank(c)) << c;
+    EXPECT_EQ(iscntrl(c) != 0, absl::ascii_iscntrl(c)) << c;
+    EXPECT_EQ(isxdigit(c) != 0, absl::ascii_isxdigit(c)) << c;
+    EXPECT_EQ(isprint(c) != 0, absl::ascii_isprint(c)) << c;
+    EXPECT_EQ(isgraph(c) != 0, absl::ascii_isgraph(c)) << c;
+    EXPECT_EQ(isupper(c) != 0, absl::ascii_isupper(c)) << c;
+    EXPECT_EQ(islower(c) != 0, absl::ascii_islower(c)) << c;
+    EXPECT_EQ(isascii(c) != 0, absl::ascii_isascii(c)) << c;
   }
 
 #ifndef __ANDROID__
@@ -166,25 +163,20 @@ TEST(AsciiToFoo, All) {
 #endif
 
   for (int i = 0; i < 256; i++) {
-    if (absl::ascii_islower(i))
-      EXPECT_EQ(absl::ascii_toupper(i), 'A' + (i - 'a')) << i;
+    const auto c = static_cast<unsigned char>(i);
+    if (absl::ascii_islower(c))
+      EXPECT_EQ(absl::ascii_toupper(c), 'A' + (i - 'a')) << c;
     else
-      EXPECT_EQ(absl::ascii_toupper(i), static_cast<char>(i)) << i;
+      EXPECT_EQ(absl::ascii_toupper(c), static_cast<char>(i)) << c;
 
-    if (absl::ascii_isupper(i))
-      EXPECT_EQ(absl::ascii_tolower(i), 'a' + (i - 'A')) << i;
+    if (absl::ascii_isupper(c))
+      EXPECT_EQ(absl::ascii_tolower(c), 'a' + (i - 'A')) << c;
     else
-      EXPECT_EQ(absl::ascii_tolower(i), static_cast<char>(i)) << i;
+      EXPECT_EQ(absl::ascii_tolower(c), static_cast<char>(i)) << c;
 
     // These CHECKs only hold in a C locale.
-    EXPECT_EQ(static_cast<char>(tolower(i)), absl::ascii_tolower(i)) << i;
-    EXPECT_EQ(static_cast<char>(toupper(i)), absl::ascii_toupper(i)) << i;
-
-    // The official to* functions don't accept negative signed chars, but
-    // our absl::ascii_to* functions do.
-    signed char sc = static_cast<signed char>(static_cast<unsigned char>(i));
-    EXPECT_EQ(absl::ascii_tolower(i), absl::ascii_tolower(sc)) << i;
-    EXPECT_EQ(absl::ascii_toupper(i), absl::ascii_toupper(sc)) << i;
+    EXPECT_EQ(static_cast<char>(tolower(i)), absl::ascii_tolower(c)) << c;
+    EXPECT_EQ(static_cast<char>(toupper(i)), absl::ascii_toupper(c)) << c;
   }
 #ifndef __ANDROID__
   // restore the old locale.
diff --git a/third_party/abseil-cpp/absl/strings/atod_manual_test.cc b/third_party/abseil-cpp/absl/strings/atod_manual_test.cc
new file mode 100644
index 0000000000..6cf28b0d61
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/atod_manual_test.cc
@@ -0,0 +1,193 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This program tests the absl::SimpleAtod and absl::SimpleAtof functions. Run
+// it as "atod_manual_test pnftd/data/*.txt" where the pnftd directory is a
+// local checkout of the https://github.com/nigeltao/parse-number-fxx-test-data
+// repository. The test suite lives in a separate repository because its more
+// than 5 million test cases weigh over several hundred megabytes and because
+// the test cases are also useful to other software projects, not just Abseil.
+// Its data/*.txt files contain one test case per line, like:
+//
+// 3C00 3F800000 3FF0000000000000 1
+// 3D00 3FA00000 3FF4000000000000 1.25
+// 3D9A 3FB33333 3FF6666666666666 1.4
+// 57B7 42F6E979 405EDD2F1A9FBE77 123.456
+// 622A 44454000 4088A80000000000 789
+// 7C00 7F800000 7FF0000000000000 123.456e789
+//
+// For each line (and using 0-based column indexes), columns [5..13] and
+// [14..30] contain the 32-bit float and 64-bit double result of parsing
+// columns [31..].
+//
+// For example, parsing "1.4" as a float gives the bits 0x3FB33333.
+//
+// In this 6-line example, the final line's float and double values are all
+// infinity. The largest finite float and double values are approximately
+// 3.40e+38 and 1.80e+308.
+
+#include <cstdint>
+#include <cstdio>
+#include <string>
+
+#include "absl/base/casts.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+
+static constexpr uint8_t kUnhex[256] = {
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,  // '0' ..= '7'
+    0x8, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  // '8' ..= '9'
+
+    0x0, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF, 0x0,  // 'A' ..= 'F'
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,  //
+};
+
+static absl::optional<std::string> ReadFileToString(const char* filename) {
+  FILE* f = fopen(filename, "rb");
+  if (!f) {
+    return absl::nullopt;
+  }
+  fseek(f, 0, SEEK_END);
+  size_t size = ftell(f);
+  fseek(f, 0, SEEK_SET);
+  std::string s(size, '\x00');
+  size_t n = fread(&s[0], 1, size, f);
+  fclose(f);
+  if (n != size) {
+    return absl::nullopt;
+  }
+  return s;
+}
+
+static bool ProcessOneTestFile(const char* filename) {
+  absl::optional<std::string> contents = ReadFileToString(filename);
+  if (!contents) {
+    absl::FPrintF(stderr, "Invalid file: %s\n", filename);
+    return false;
+  }
+
+  int num_cases = 0;
+  for (absl::string_view v(*contents); !v.empty();) {
+    size_t new_line = v.find('\n');
+    if ((new_line == absl::string_view::npos) || (new_line < 32)) {
+      break;
+    }
+    absl::string_view input = v.substr(31, new_line - 31);
+
+    // Test absl::SimpleAtof.
+    {
+      float f;
+      if (!absl::SimpleAtof(input, &f)) {
+        absl::FPrintF(stderr, "Could not parse \"%s\" in %s\n", input,
+                      filename);
+        return false;
+      }
+      uint32_t have32 = absl::bit_cast<uint32_t>(f);
+
+      uint32_t want32 = 0;
+      for (int i = 0; i < 8; i++) {
+        want32 = (want32 << 4) | kUnhex[static_cast<unsigned char>(v[5 + i])];
+      }
+
+      if (have32 != want32) {
+        absl::FPrintF(stderr,
+                      "absl::SimpleAtof failed parsing \"%s\" in %s\n  have  "
+                      "%08X\n  want  %08X\n",
+                      input, filename, have32, want32);
+        return false;
+      }
+    }
+
+    // Test absl::SimpleAtod.
+    {
+      double d;
+      if (!absl::SimpleAtod(input, &d)) {
+        absl::FPrintF(stderr, "Could not parse \"%s\" in %s\n", input,
+                      filename);
+        return false;
+      }
+      uint64_t have64 = absl::bit_cast<uint64_t>(d);
+
+      uint64_t want64 = 0;
+      for (int i = 0; i < 16; i++) {
+        want64 = (want64 << 4) | kUnhex[static_cast<unsigned char>(v[14 + i])];
+      }
+
+      if (have64 != want64) {
+        absl::FPrintF(stderr,
+                      "absl::SimpleAtod failed parsing \"%s\" in %s\n  have  "
+                      "%016X\n  want  %016X\n",
+                      input, filename, have64, want64);
+        return false;
+      }
+    }
+
+    num_cases++;
+    v = v.substr(new_line + 1);
+  }
+  printf("%8d OK in %s\n", num_cases, filename);
+  return true;
+}
+
+int main(int argc, char** argv) {
+  if (argc < 2) {
+    absl::FPrintF(
+        stderr,
+        "Usage: %s pnftd/data/*.txt\nwhere the pnftd directory is a local "
+        "checkout of "
+        "the\nhttps://github.com/nigeltao/parse-number-fxx-test-data "
+        "repository.\n",
+        argv[0]);
+    return 1;
+  }
+
+  for (int i = 1; i < argc; i++) {
+    if (!ProcessOneTestFile(argv[i])) {
+      return 1;
+    }
+  }
+  return 0;
+}
diff --git a/third_party/abseil-cpp/absl/strings/charconv.cc b/third_party/abseil-cpp/absl/strings/charconv.cc
index fefcfc90a5..69d420bcea 100644
--- a/third_party/abseil-cpp/absl/strings/charconv.cc
+++ b/third_party/abseil-cpp/absl/strings/charconv.cc
@@ -18,6 +18,7 @@
 #include <cassert>
 #include <cmath>
 #include <cstring>
+#include <limits>
 
 #include "absl/base/casts.h"
 #include "absl/numeric/bits.h"
@@ -65,6 +66,14 @@ struct FloatTraits;
 
 template <>
 struct FloatTraits<double> {
+  using mantissa_t = uint64_t;
+
+  // The number of bits in the given float type.
+  static constexpr int kTargetBits = 64;
+
+  // The number of exponent bits in the given float type.
+  static constexpr int kTargetExponentBits = 11;
+
   // The number of mantissa bits in the given float type.  This includes the
   // implied high bit.
   static constexpr int kTargetMantissaBits = 53;
@@ -83,6 +92,31 @@ struct FloatTraits<double> {
   // m * 2**kMinNormalExponent is exactly equal to DBL_MIN.
   static constexpr int kMinNormalExponent = -1074;
 
+  // The IEEE exponent bias.  It equals ((1 << (kTargetExponentBits - 1)) - 1).
+  static constexpr int kExponentBias = 1023;
+
+  // The Eisel-Lemire "Shifting to 54/25 Bits" adjustment.  It equals (63 - 1 -
+  // kTargetMantissaBits).
+  static constexpr int kEiselLemireShift = 9;
+
+  // The Eisel-Lemire high64_mask.  It equals ((1 << kEiselLemireShift) - 1).
+  static constexpr uint64_t kEiselLemireMask = uint64_t{0x1FF};
+
+  // The smallest negative integer N (smallest negative means furthest from
+  // zero) such that parsing 9999999999999999999eN, with 19 nines, is still
+  // positive. Parsing a smaller (more negative) N will produce zero.
+  //
+  // Adjusting the decimal point and exponent, without adjusting the value,
+  // 9999999999999999999eN equals 9.999999999999999999eM where M = N + 18.
+  //
+  // 9999999999999999999, with 19 nines but no decimal point, is the largest
+  // "repeated nines" integer that fits in a uint64_t.
+  static constexpr int kEiselLemireMinInclusiveExp10 = -324 - 18;
+
+  // The smallest positive integer N such that parsing 1eN produces infinity.
+  // Parsing a smaller N will produce something finite.
+  static constexpr int kEiselLemireMaxExclusiveExp10 = 309;
+
   static double MakeNan(const char* tagp) {
     // Support nan no matter which namespace it's in.  Some platforms
     // incorrectly don't put it in namespace std.
@@ -103,7 +137,7 @@ struct FloatTraits<double> {
   // a normal value is made, or it must be less narrow than that, in which case
   // `exponent` must be exactly kMinNormalExponent, and a subnormal value is
   // made.
-  static double Make(uint64_t mantissa, int exponent, bool sign) {
+  static double Make(mantissa_t mantissa, int exponent, bool sign) {
 #ifndef ABSL_BIT_PACK_FLOATS
     // Support ldexp no matter which namespace it's in.  Some platforms
     // incorrectly don't put it in namespace std.
@@ -116,8 +150,10 @@ struct FloatTraits<double> {
     if (mantissa > kMantissaMask) {
       // Normal value.
       // Adjust by 1023 for the exponent representation bias, and an additional
-      // 52 due to the implied decimal point in the IEEE mantissa represenation.
-      dbl += uint64_t{exponent + 1023u + kTargetMantissaBits - 1} << 52;
+      // 52 due to the implied decimal point in the IEEE mantissa
+      // representation.
+      dbl += static_cast<uint64_t>(exponent + 1023 + kTargetMantissaBits - 1)
+             << 52;
       mantissa &= kMantissaMask;
     } else {
       // subnormal value
@@ -134,16 +170,27 @@ struct FloatTraits<double> {
 // members and methods.
 template <>
 struct FloatTraits<float> {
+  using mantissa_t = uint32_t;
+
+  static constexpr int kTargetBits = 32;
+  static constexpr int kTargetExponentBits = 8;
   static constexpr int kTargetMantissaBits = 24;
   static constexpr int kMaxExponent = 104;
   static constexpr int kMinNormalExponent = -149;
+  static constexpr int kExponentBias = 127;
+  static constexpr int kEiselLemireShift = 38;
+  static constexpr uint64_t kEiselLemireMask = uint64_t{0x3FFFFFFFFF};
+  static constexpr int kEiselLemireMinInclusiveExp10 = -46 - 18;
+  static constexpr int kEiselLemireMaxExclusiveExp10 = 39;
+
   static float MakeNan(const char* tagp) {
     // Support nanf no matter which namespace it's in.  Some platforms
     // incorrectly don't put it in namespace std.
     using namespace std;  // NOLINT
     return nanf(tagp);
   }
-  static float Make(uint32_t mantissa, int exponent, bool sign) {
+
+  static float Make(mantissa_t mantissa, int exponent, bool sign) {
 #ifndef ABSL_BIT_PACK_FLOATS
     // Support ldexpf no matter which namespace it's in.  Some platforms
     // incorrectly don't put it in namespace std.
@@ -157,7 +204,8 @@ struct FloatTraits<float> {
       // Normal value.
       // Adjust by 127 for the exponent representation bias, and an additional
       // 23 due to the implied decimal point in the IEEE mantissa represenation.
-      flt += uint32_t{exponent + 127u + kTargetMantissaBits - 1} << 23;
+      flt += static_cast<uint32_t>(exponent + 127 + kTargetMantissaBits - 1)
+             << 23;
       mantissa &= kMantissaMask;
     } else {
       // subnormal value
@@ -181,39 +229,45 @@ struct FloatTraits<float> {
 //
 //   2**63 <= Power10Mantissa(n) < 2**64.
 //
+// See the "Table of powers of 10" comment below for a "1e60" example.
+//
 // Lookups into the power-of-10 table must first check the Power10Overflow() and
 // Power10Underflow() functions, to avoid out-of-bounds table access.
 //
-// Indexes into these tables are biased by -kPower10TableMin, and the table has
-// values in the range [kPower10TableMin, kPower10TableMax].
-extern const uint64_t kPower10MantissaTable[];
-extern const int16_t kPower10ExponentTable[];
+// Indexes into these tables are biased by -kPower10TableMinInclusive. Valid
+// indexes range from kPower10TableMinInclusive to kPower10TableMaxExclusive.
+extern const uint64_t kPower10MantissaHighTable[];  // High 64 of 128 bits.
+extern const uint64_t kPower10MantissaLowTable[];   // Low  64 of 128 bits.
 
-// The smallest allowed value for use with the Power10Mantissa() and
-// Power10Exponent() functions below.  (If a smaller exponent is needed in
+// The smallest (inclusive) allowed value for use with the Power10Mantissa()
+// and Power10Exponent() functions below.  (If a smaller exponent is needed in
 // calculations, the end result is guaranteed to underflow.)
-constexpr int kPower10TableMin = -342;
+constexpr int kPower10TableMinInclusive = -342;
 
-// The largest allowed value for use with the Power10Mantissa() and
-// Power10Exponent() functions below.  (If a smaller exponent is needed in
-// calculations, the end result is guaranteed to overflow.)
-constexpr int kPower10TableMax = 308;
+// The largest (exclusive) allowed value for use with the Power10Mantissa() and
+// Power10Exponent() functions below.  (If a larger-or-equal exponent is needed
+// in calculations, the end result is guaranteed to overflow.)
+constexpr int kPower10TableMaxExclusive = 309;
 
 uint64_t Power10Mantissa(int n) {
-  return kPower10MantissaTable[n - kPower10TableMin];
+  return kPower10MantissaHighTable[n - kPower10TableMinInclusive];
 }
 
 int Power10Exponent(int n) {
-  return kPower10ExponentTable[n - kPower10TableMin];
+  // The 217706 etc magic numbers encode the results as a formula instead of a
+  // table. Their equivalence (over the kPower10TableMinInclusive ..
+  // kPower10TableMaxExclusive range) is confirmed by
+  // https://github.com/google/wuffs/blob/315b2e52625ebd7b02d8fac13e3cd85ea374fb80/script/print-mpb-powers-of-10.go
+  return (217706 * n >> 16) - 63;
 }
 
 // Returns true if n is large enough that 10**n always results in an IEEE
 // overflow.
-bool Power10Overflow(int n) { return n > kPower10TableMax; }
+bool Power10Overflow(int n) { return n >= kPower10TableMaxExclusive; }
 
 // Returns true if n is small enough that 10**n times a ParsedFloat mantissa
 // always results in an IEEE underflow.
-bool Power10Underflow(int n) { return n < kPower10TableMin; }
+bool Power10Underflow(int n) { return n < kPower10TableMinInclusive; }
 
 // Returns true if Power10Mantissa(n) * 2**Power10Exponent(n) is exactly equal
 // to 10**n numerically.  Put another way, this returns true if there is no
@@ -242,9 +296,11 @@ struct CalculatedFloat {
 
 // Returns the bit width of the given uint128.  (Equivalently, returns 128
 // minus the number of leading zero bits.)
-unsigned BitWidth(uint128 value) {
+int BitWidth(uint128 value) {
   if (Uint128High64(value) == 0) {
-    return static_cast<unsigned>(bit_width(Uint128Low64(value)));
+    // This static_cast is only needed when using a std::bit_width()
+    // implementation that does not have the fix for LWG 3656 applied.
+    return static_cast<int>(bit_width(Uint128Low64(value)));
   }
   return 128 - countl_zero(Uint128High64(value));
 }
@@ -285,14 +341,19 @@ template <typename FloatType>
 bool HandleEdgeCase(const strings_internal::ParsedFloat& input, bool negative,
                     FloatType* value) {
   if (input.type == strings_internal::FloatType::kNan) {
-    // A bug in both clang and gcc would cause the compiler to optimize away the
-    // buffer we are building below.  Declaring the buffer volatile avoids the
-    // issue, and has no measurable performance impact in microbenchmarks.
+    // A bug in both clang < 7 and gcc would cause the compiler to optimize
+    // away the buffer we are building below.  Declaring the buffer volatile
+    // avoids the issue, and has no measurable performance impact in
+    // microbenchmarks.
     //
     // https://bugs.llvm.org/show_bug.cgi?id=37778
     // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86113
     constexpr ptrdiff_t kNanBufferSize = 128;
+#if defined(__GNUC__) || (defined(__clang__) && __clang_major__ < 7)
     volatile char n_char_sequence[kNanBufferSize];
+#else
+    char n_char_sequence[kNanBufferSize];
+#endif
     if (input.subrange_begin == nullptr) {
       n_char_sequence[0] = '\0';
     } else {
@@ -337,8 +398,10 @@ void EncodeResult(const CalculatedFloat& calculated, bool negative,
     *value = negative ? -0.0 : 0.0;
     return;
   }
-  *value = FloatTraits<FloatType>::Make(calculated.mantissa,
-                                        calculated.exponent, negative);
+  *value = FloatTraits<FloatType>::Make(
+      static_cast<typename FloatTraits<FloatType>::mantissa_t>(
+          calculated.mantissa),
+      calculated.exponent, negative);
 }
 
 // Returns the given uint128 shifted to the right by `shift` bits, and rounds
@@ -519,7 +582,9 @@ CalculatedFloat CalculateFromParsedHexadecimal(
     const strings_internal::ParsedFloat& parsed_hex) {
   uint64_t mantissa = parsed_hex.mantissa;
   int exponent = parsed_hex.exponent;
-  auto mantissa_width = static_cast<unsigned>(bit_width(mantissa));
+  // This static_cast is only needed when using a std::bit_width()
+  // implementation that does not have the fix for LWG 3656 applied.
+  int mantissa_width = static_cast<int>(bit_width(mantissa));
   const int shift = NormalizedShiftSize<FloatType>(mantissa_width, exponent);
   bool result_exact;
   exponent += shift;
@@ -595,6 +660,185 @@ CalculatedFloat CalculateFromParsedDecimal(
                                                  binary_exponent);
 }
 
+// As discussed in https://nigeltao.github.io/blog/2020/eisel-lemire.html the
+// primary goal of the Eisel-Lemire algorithm is speed, for 99+% of the cases,
+// not 100% coverage. As long as Eisel-Lemire doesn’t claim false positives,
+// the combined approach (falling back to an alternative implementation when
+// this function returns false) is both fast and correct.
+template <typename FloatType>
+bool EiselLemire(const strings_internal::ParsedFloat& input, bool negative,
+                 FloatType* value, std::errc* ec) {
+  uint64_t man = input.mantissa;
+  int exp10 = input.exponent;
+  if (exp10 < FloatTraits<FloatType>::kEiselLemireMinInclusiveExp10) {
+    *value = negative ? -0.0 : 0.0;
+    *ec = std::errc::result_out_of_range;
+    return true;
+  } else if (exp10 >= FloatTraits<FloatType>::kEiselLemireMaxExclusiveExp10) {
+    // Return max (a finite value) consistent with from_chars and DR 3081. For
+    // SimpleAtod and SimpleAtof, post-processing will return infinity.
+    *value = negative ? -std::numeric_limits<FloatType>::max()
+                      : std::numeric_limits<FloatType>::max();
+    *ec = std::errc::result_out_of_range;
+    return true;
+  }
+
+  // Assert kPower10TableMinInclusive <= exp10 < kPower10TableMaxExclusive.
+  // Equivalently, !Power10Underflow(exp10) and !Power10Overflow(exp10).
+  static_assert(
+      FloatTraits<FloatType>::kEiselLemireMinInclusiveExp10 >=
+          kPower10TableMinInclusive,
+      "(exp10-kPower10TableMinInclusive) in kPower10MantissaHighTable bounds");
+  static_assert(
+      FloatTraits<FloatType>::kEiselLemireMaxExclusiveExp10 <=
+          kPower10TableMaxExclusive,
+      "(exp10-kPower10TableMinInclusive) in kPower10MantissaHighTable bounds");
+
+  // The terse (+) comments in this function body refer to sections of the
+  // https://nigeltao.github.io/blog/2020/eisel-lemire.html blog post.
+  //
+  // That blog post discusses double precision (11 exponent bits with a -1023
+  // bias, 52 mantissa bits), but the same approach applies to single precision
+  // (8 exponent bits with a -127 bias, 23 mantissa bits). Either way, the
+  // computation here happens with 64-bit values (e.g. man) or 128-bit values
+  // (e.g. x) before finally converting to 64- or 32-bit floating point.
+  //
+  // See also "Number Parsing at a Gigabyte per Second, Software: Practice and
+  // Experience 51 (8), 2021" (https://arxiv.org/abs/2101.11408) for detail.
+
+  // (+) Normalization.
+  int clz = countl_zero(man);
+  man <<= static_cast<unsigned int>(clz);
+  // The 217706 etc magic numbers are from the Power10Exponent function.
+  uint64_t ret_exp2 =
+      static_cast<uint64_t>((217706 * exp10 >> 16) + 64 +
+                            FloatTraits<FloatType>::kExponentBias - clz);
+
+  // (+) Multiplication.
+  uint128 x = static_cast<uint128>(man) *
+              static_cast<uint128>(
+                  kPower10MantissaHighTable[exp10 - kPower10TableMinInclusive]);
+
+  // (+) Wider Approximation.
+  static constexpr uint64_t high64_mask =
+      FloatTraits<FloatType>::kEiselLemireMask;
+  if (((Uint128High64(x) & high64_mask) == high64_mask) &&
+      (man > (std::numeric_limits<uint64_t>::max() - Uint128Low64(x)))) {
+    uint128 y =
+        static_cast<uint128>(man) *
+        static_cast<uint128>(
+            kPower10MantissaLowTable[exp10 - kPower10TableMinInclusive]);
+    x += Uint128High64(y);
+    // For example, parsing "4503599627370497.5" will take the if-true
+    // branch here (for double precision), since:
+    //  - x   = 0x8000000000000BFF_FFFFFFFFFFFFFFFF
+    //  - y   = 0x8000000000000BFF_7FFFFFFFFFFFF400
+    //  - man = 0xA000000000000F00
+    // Likewise, when parsing "0.0625" for single precision:
+    //  - x   = 0x7FFFFFFFFFFFFFFF_FFFFFFFFFFFFFFFF
+    //  - y   = 0x813FFFFFFFFFFFFF_8A00000000000000
+    //  - man = 0x9C40000000000000
+    if (((Uint128High64(x) & high64_mask) == high64_mask) &&
+        ((Uint128Low64(x) + 1) == 0) &&
+        (man > (std::numeric_limits<uint64_t>::max() - Uint128Low64(y)))) {
+      return false;
+    }
+  }
+
+  // (+) Shifting to 54 Bits (or for single precision, to 25 bits).
+  uint64_t msb = Uint128High64(x) >> 63;
+  uint64_t ret_man =
+      Uint128High64(x) >> (msb + FloatTraits<FloatType>::kEiselLemireShift);
+  ret_exp2 -= 1 ^ msb;
+
+  // (+) Half-way Ambiguity.
+  //
+  // For example, parsing "1e+23" will take the if-true branch here (for double
+  // precision), since:
+  //  - x       = 0x54B40B1F852BDA00_0000000000000000
+  //  - ret_man = 0x002A5A058FC295ED
+  // Likewise, when parsing "20040229.0" for single precision:
+  //  - x       = 0x4C72894000000000_0000000000000000
+  //  - ret_man = 0x000000000131CA25
+  if ((Uint128Low64(x) == 0) && ((Uint128High64(x) & high64_mask) == 0) &&
+      ((ret_man & 3) == 1)) {
+    return false;
+  }
+
+  // (+) From 54 to 53 Bits (or for single precision, from 25 to 24 bits).
+  ret_man += ret_man & 1;  // Line From54a.
+  ret_man >>= 1;           // Line From54b.
+  // Incrementing ret_man (at line From54a) may have overflowed 54 bits (53
+  // bits after the right shift by 1 at line From54b), so adjust for that.
+  //
+  // For example, parsing "9223372036854775807" will take the if-true branch
+  // here (for double precision), since:
+  //  - ret_man = 0x0020000000000000 = (1 << 53)
+  // Likewise, when parsing "2147483647.0" for single precision:
+  //  - ret_man = 0x0000000001000000 = (1 << 24)
+  if ((ret_man >> FloatTraits<FloatType>::kTargetMantissaBits) > 0) {
+    ret_exp2 += 1;
+    // Conceptually, we need a "ret_man >>= 1" in this if-block to balance
+    // incrementing ret_exp2 in the line immediately above. However, we only
+    // get here when line From54a overflowed (after adding a 1), so ret_man
+    // here is (1 << 53). Its low 53 bits are therefore all zeroes. The only
+    // remaining use of ret_man is to mask it with ((1 << 52) - 1), so only its
+    // low 52 bits matter. A "ret_man >>= 1" would have no effect in practice.
+    //
+    // We omit the "ret_man >>= 1", even if it is cheap (and this if-branch is
+    // rarely taken) and technically 'more correct', so that mutation tests
+    // that would otherwise modify or omit that "ret_man >>= 1" don't complain
+    // that such code mutations have no observable effect.
+  }
+
+  // ret_exp2 is a uint64_t. Zero or underflow means that we're in subnormal
+  // space. max_exp2 (0x7FF for double precision, 0xFF for single precision) or
+  // above means that we're in Inf/NaN space.
+  //
+  // The if block is equivalent to (but has fewer branches than):
+  //   if ((ret_exp2 <= 0) || (ret_exp2 >= max_exp2)) { etc }
+  //
+  // For example, parsing "4.9406564584124654e-324" will take the if-true
+  // branch here, since ret_exp2 = -51.
+  static constexpr uint64_t max_exp2 =
+      (1 << FloatTraits<FloatType>::kTargetExponentBits) - 1;
+  if ((ret_exp2 - 1) >= (max_exp2 - 1)) {
+    return false;
+  }
+
+#ifndef ABSL_BIT_PACK_FLOATS
+  if (FloatTraits<FloatType>::kTargetBits == 64) {
+    *value = FloatTraits<FloatType>::Make(
+        (ret_man & 0x000FFFFFFFFFFFFFu) | 0x0010000000000000u,
+        static_cast<int>(ret_exp2) - 1023 - 52, negative);
+    return true;
+  } else if (FloatTraits<FloatType>::kTargetBits == 32) {
+    *value = FloatTraits<FloatType>::Make(
+        (static_cast<uint32_t>(ret_man) & 0x007FFFFFu) | 0x00800000u,
+        static_cast<int>(ret_exp2) - 127 - 23, negative);
+    return true;
+  }
+#else
+  if (FloatTraits<FloatType>::kTargetBits == 64) {
+    uint64_t ret_bits = (ret_exp2 << 52) | (ret_man & 0x000FFFFFFFFFFFFFu);
+    if (negative) {
+      ret_bits |= 0x8000000000000000u;
+    }
+    *value = absl::bit_cast<double>(ret_bits);
+    return true;
+  } else if (FloatTraits<FloatType>::kTargetBits == 32) {
+    uint32_t ret_bits = (static_cast<uint32_t>(ret_exp2) << 23) |
+                        (static_cast<uint32_t>(ret_man) & 0x007FFFFFu);
+    if (negative) {
+      ret_bits |= 0x80000000u;
+    }
+    *value = absl::bit_cast<float>(ret_bits);
+    return true;
+  }
+#endif  // ABSL_BIT_PACK_FLOATS
+  return false;
+}
+
 template <typename FloatType>
 from_chars_result FromCharsImpl(const char* first, const char* last,
                                 FloatType& value, chars_format fmt_flags) {
@@ -668,6 +912,12 @@ from_chars_result FromCharsImpl(const char* first, const char* last,
     if (HandleEdgeCase(decimal_parse, negative, &value)) {
       return result;
     }
+    // A nullptr subrange_begin means that the decimal_parse.mantissa is exact
+    // (not truncated), a precondition of the Eisel-Lemire algorithm.
+    if ((decimal_parse.subrange_begin == nullptr) &&
+        EiselLemire<FloatType>(decimal_parse, negative, &value, &result.ec)) {
+      return result;
+    }
     CalculatedFloat calculated =
         CalculateFromParsedDecimal<FloatType>(decimal_parse);
     EncodeResult(calculated, negative, &result, &value);
@@ -688,15 +938,46 @@ from_chars_result from_chars(const char* first, const char* last, float& value,
 
 namespace {
 
-// Table of powers of 10, from kPower10TableMin to kPower10TableMax.
+// Table of powers of 10, from kPower10TableMinInclusive to
+// kPower10TableMaxExclusive.
+//
+// kPower10MantissaHighTable[i - kPower10TableMinInclusive] stores the 64-bit
+// mantissa. The high bit is always on.
+//
+// kPower10MantissaLowTable extends that 64-bit mantissa to 128 bits.
+//
+// Power10Exponent(i) calculates the power-of-two exponent.
+//
+// For a number i, this gives the unique mantissaHigh and exponent such that
+// (mantissaHigh * 2**exponent) <= 10**i < ((mantissaHigh + 1) * 2**exponent).
+//
+// For example, Python can confirm that the exact hexadecimal value of 1e60 is:
+//    >>> a = 1000000000000000000000000000000000000000000000000000000000000
+//    >>> hex(a)
+//    '0x9f4f2726179a224501d762422c946590d91000000000000000'
+// Adding underscores at every 8th hex digit shows 50 hex digits:
+//    '0x9f4f2726_179a2245_01d76242_2c946590_d9100000_00000000_00'.
+// In this case, the high bit of the first hex digit, 9, is coincidentally set,
+// so we do not have to do further shifting to deduce the 128-bit mantissa:
+//   - kPower10MantissaHighTable[60 - kP10TMI] = 0x9f4f2726179a2245U
+//   - kPower10MantissaLowTable[ 60 - kP10TMI] = 0x01d762422c946590U
+// where kP10TMI is kPower10TableMinInclusive. The low 18 of those 50 hex
+// digits are truncated.
+//
+// 50 hex digits (with the high bit set) is 200 bits and mantissaHigh holds 64
+// bits, so Power10Exponent(60) = 200 - 64 = 136. Again, Python can confirm:
+//    >>> b = 0x9f4f2726179a2245
+//    >>> ((b+0)<<136) <= a
+//    True
+//    >>> ((b+1)<<136) <= a
+//    False
 //
-// kPower10MantissaTable[i - kPower10TableMin] stores the 64-bit mantissa (high
-// bit always on), and kPower10ExponentTable[i - kPower10TableMin] stores the
-// power-of-two exponent.  For a given number i, this gives the unique mantissa
-// and exponent such that mantissa * 2**exponent <= 10**i < (mantissa + 1) *
-// 2**exponent.
+// The tables were generated by
+// https://github.com/google/wuffs/blob/315b2e52625ebd7b02d8fac13e3cd85ea374fb80/script/print-mpb-powers-of-10.go
+// after re-formatting its output into two arrays of N uint64_t values (instead
+// of an N element array of uint64_t pairs).
 
-const uint64_t kPower10MantissaTable[] = {
+const uint64_t kPower10MantissaHighTable[] = {
     0xeef453d6923bd65aU, 0x9558b4661b6565f8U, 0xbaaee17fa23ebf76U,
     0xe95a99df8ace6f53U, 0x91d8a02bb6c10594U, 0xb64ec836a47146f9U,
     0xe3e27a444d8d98b7U, 0x8e6d8c6ab0787f72U, 0xb208ef855c969f4fU,
@@ -916,67 +1197,224 @@ const uint64_t kPower10MantissaTable[] = {
     0xb6472e511c81471dU, 0xe3d8f9e563a198e5U, 0x8e679c2f5e44ff8fU,
 };
 
-const int16_t kPower10ExponentTable[] = {
-    -1200, -1196, -1193, -1190, -1186, -1183, -1180, -1176, -1173, -1170, -1166,
-    -1163, -1160, -1156, -1153, -1150, -1146, -1143, -1140, -1136, -1133, -1130,
-    -1127, -1123, -1120, -1117, -1113, -1110, -1107, -1103, -1100, -1097, -1093,
-    -1090, -1087, -1083, -1080, -1077, -1073, -1070, -1067, -1063, -1060, -1057,
-    -1053, -1050, -1047, -1043, -1040, -1037, -1034, -1030, -1027, -1024, -1020,
-    -1017, -1014, -1010, -1007, -1004, -1000, -997,  -994,  -990,  -987,  -984,
-    -980,  -977,  -974,  -970,  -967,  -964,  -960,  -957,  -954,  -950,  -947,
-    -944,  -940,  -937,  -934,  -931,  -927,  -924,  -921,  -917,  -914,  -911,
-    -907,  -904,  -901,  -897,  -894,  -891,  -887,  -884,  -881,  -877,  -874,
-    -871,  -867,  -864,  -861,  -857,  -854,  -851,  -847,  -844,  -841,  -838,
-    -834,  -831,  -828,  -824,  -821,  -818,  -814,  -811,  -808,  -804,  -801,
-    -798,  -794,  -791,  -788,  -784,  -781,  -778,  -774,  -771,  -768,  -764,
-    -761,  -758,  -754,  -751,  -748,  -744,  -741,  -738,  -735,  -731,  -728,
-    -725,  -721,  -718,  -715,  -711,  -708,  -705,  -701,  -698,  -695,  -691,
-    -688,  -685,  -681,  -678,  -675,  -671,  -668,  -665,  -661,  -658,  -655,
-    -651,  -648,  -645,  -642,  -638,  -635,  -632,  -628,  -625,  -622,  -618,
-    -615,  -612,  -608,  -605,  -602,  -598,  -595,  -592,  -588,  -585,  -582,
-    -578,  -575,  -572,  -568,  -565,  -562,  -558,  -555,  -552,  -549,  -545,
-    -542,  -539,  -535,  -532,  -529,  -525,  -522,  -519,  -515,  -512,  -509,
-    -505,  -502,  -499,  -495,  -492,  -489,  -485,  -482,  -479,  -475,  -472,
-    -469,  -465,  -462,  -459,  -455,  -452,  -449,  -446,  -442,  -439,  -436,
-    -432,  -429,  -426,  -422,  -419,  -416,  -412,  -409,  -406,  -402,  -399,
-    -396,  -392,  -389,  -386,  -382,  -379,  -376,  -372,  -369,  -366,  -362,
-    -359,  -356,  -353,  -349,  -346,  -343,  -339,  -336,  -333,  -329,  -326,
-    -323,  -319,  -316,  -313,  -309,  -306,  -303,  -299,  -296,  -293,  -289,
-    -286,  -283,  -279,  -276,  -273,  -269,  -266,  -263,  -259,  -256,  -253,
-    -250,  -246,  -243,  -240,  -236,  -233,  -230,  -226,  -223,  -220,  -216,
-    -213,  -210,  -206,  -203,  -200,  -196,  -193,  -190,  -186,  -183,  -180,
-    -176,  -173,  -170,  -166,  -163,  -160,  -157,  -153,  -150,  -147,  -143,
-    -140,  -137,  -133,  -130,  -127,  -123,  -120,  -117,  -113,  -110,  -107,
-    -103,  -100,  -97,   -93,   -90,   -87,   -83,   -80,   -77,   -73,   -70,
-    -67,   -63,   -60,   -57,   -54,   -50,   -47,   -44,   -40,   -37,   -34,
-    -30,   -27,   -24,   -20,   -17,   -14,   -10,   -7,    -4,    0,     3,
-    6,     10,    13,    16,    20,    23,    26,    30,    33,    36,    39,
-    43,    46,    49,    53,    56,    59,    63,    66,    69,    73,    76,
-    79,    83,    86,    89,    93,    96,    99,    103,   106,   109,   113,
-    116,   119,   123,   126,   129,   132,   136,   139,   142,   146,   149,
-    152,   156,   159,   162,   166,   169,   172,   176,   179,   182,   186,
-    189,   192,   196,   199,   202,   206,   209,   212,   216,   219,   222,
-    226,   229,   232,   235,   239,   242,   245,   249,   252,   255,   259,
-    262,   265,   269,   272,   275,   279,   282,   285,   289,   292,   295,
-    299,   302,   305,   309,   312,   315,   319,   322,   325,   328,   332,
-    335,   338,   342,   345,   348,   352,   355,   358,   362,   365,   368,
-    372,   375,   378,   382,   385,   388,   392,   395,   398,   402,   405,
-    408,   412,   415,   418,   422,   425,   428,   431,   435,   438,   441,
-    445,   448,   451,   455,   458,   461,   465,   468,   471,   475,   478,
-    481,   485,   488,   491,   495,   498,   501,   505,   508,   511,   515,
-    518,   521,   524,   528,   531,   534,   538,   541,   544,   548,   551,
-    554,   558,   561,   564,   568,   571,   574,   578,   581,   584,   588,
-    591,   594,   598,   601,   604,   608,   611,   614,   617,   621,   624,
-    627,   631,   634,   637,   641,   644,   647,   651,   654,   657,   661,
-    664,   667,   671,   674,   677,   681,   684,   687,   691,   694,   697,
-    701,   704,   707,   711,   714,   717,   720,   724,   727,   730,   734,
-    737,   740,   744,   747,   750,   754,   757,   760,   764,   767,   770,
-    774,   777,   780,   784,   787,   790,   794,   797,   800,   804,   807,
-    810,   813,   817,   820,   823,   827,   830,   833,   837,   840,   843,
-    847,   850,   853,   857,   860,   863,   867,   870,   873,   877,   880,
-    883,   887,   890,   893,   897,   900,   903,   907,   910,   913,   916,
-    920,   923,   926,   930,   933,   936,   940,   943,   946,   950,   953,
-    956,   960,
+const uint64_t kPower10MantissaLowTable[] = {
+    0x113faa2906a13b3fU, 0x4ac7ca59a424c507U, 0x5d79bcf00d2df649U,
+    0xf4d82c2c107973dcU, 0x79071b9b8a4be869U, 0x9748e2826cdee284U,
+    0xfd1b1b2308169b25U, 0xfe30f0f5e50e20f7U, 0xbdbd2d335e51a935U,
+    0xad2c788035e61382U, 0x4c3bcb5021afcc31U, 0xdf4abe242a1bbf3dU,
+    0xd71d6dad34a2af0dU, 0x8672648c40e5ad68U, 0x680efdaf511f18c2U,
+    0x0212bd1b2566def2U, 0x014bb630f7604b57U, 0x419ea3bd35385e2dU,
+    0x52064cac828675b9U, 0x7343efebd1940993U, 0x1014ebe6c5f90bf8U,
+    0xd41a26e077774ef6U, 0x8920b098955522b4U, 0x55b46e5f5d5535b0U,
+    0xeb2189f734aa831dU, 0xa5e9ec7501d523e4U, 0x47b233c92125366eU,
+    0x999ec0bb696e840aU, 0xc00670ea43ca250dU, 0x380406926a5e5728U,
+    0xc605083704f5ecf2U, 0xf7864a44c633682eU, 0x7ab3ee6afbe0211dU,
+    0x5960ea05bad82964U, 0x6fb92487298e33bdU, 0xa5d3b6d479f8e056U,
+    0x8f48a4899877186cU, 0x331acdabfe94de87U, 0x9ff0c08b7f1d0b14U,
+    0x07ecf0ae5ee44dd9U, 0xc9e82cd9f69d6150U, 0xbe311c083a225cd2U,
+    0x6dbd630a48aaf406U, 0x092cbbccdad5b108U, 0x25bbf56008c58ea5U,
+    0xaf2af2b80af6f24eU, 0x1af5af660db4aee1U, 0x50d98d9fc890ed4dU,
+    0xe50ff107bab528a0U, 0x1e53ed49a96272c8U, 0x25e8e89c13bb0f7aU,
+    0x77b191618c54e9acU, 0xd59df5b9ef6a2417U, 0x4b0573286b44ad1dU,
+    0x4ee367f9430aec32U, 0x229c41f793cda73fU, 0x6b43527578c1110fU,
+    0x830a13896b78aaa9U, 0x23cc986bc656d553U, 0x2cbfbe86b7ec8aa8U,
+    0x7bf7d71432f3d6a9U, 0xdaf5ccd93fb0cc53U, 0xd1b3400f8f9cff68U,
+    0x23100809b9c21fa1U, 0xabd40a0c2832a78aU, 0x16c90c8f323f516cU,
+    0xae3da7d97f6792e3U, 0x99cd11cfdf41779cU, 0x40405643d711d583U,
+    0x482835ea666b2572U, 0xda3243650005eecfU, 0x90bed43e40076a82U,
+    0x5a7744a6e804a291U, 0x711515d0a205cb36U, 0x0d5a5b44ca873e03U,
+    0xe858790afe9486c2U, 0x626e974dbe39a872U, 0xfb0a3d212dc8128fU,
+    0x7ce66634bc9d0b99U, 0x1c1fffc1ebc44e80U, 0xa327ffb266b56220U,
+    0x4bf1ff9f0062baa8U, 0x6f773fc3603db4a9U, 0xcb550fb4384d21d3U,
+    0x7e2a53a146606a48U, 0x2eda7444cbfc426dU, 0xfa911155fefb5308U,
+    0x793555ab7eba27caU, 0x4bc1558b2f3458deU, 0x9eb1aaedfb016f16U,
+    0x465e15a979c1cadcU, 0x0bfacd89ec191ec9U, 0xcef980ec671f667bU,
+    0x82b7e12780e7401aU, 0xd1b2ecb8b0908810U, 0x861fa7e6dcb4aa15U,
+    0x67a791e093e1d49aU, 0xe0c8bb2c5c6d24e0U, 0x58fae9f773886e18U,
+    0xaf39a475506a899eU, 0x6d8406c952429603U, 0xc8e5087ba6d33b83U,
+    0xfb1e4a9a90880a64U, 0x5cf2eea09a55067fU, 0xf42faa48c0ea481eU,
+    0xf13b94daf124da26U, 0x76c53d08d6b70858U, 0x54768c4b0c64ca6eU,
+    0xa9942f5dcf7dfd09U, 0xd3f93b35435d7c4cU, 0xc47bc5014a1a6dafU,
+    0x359ab6419ca1091bU, 0xc30163d203c94b62U, 0x79e0de63425dcf1dU,
+    0x985915fc12f542e4U, 0x3e6f5b7b17b2939dU, 0xa705992ceecf9c42U,
+    0x50c6ff782a838353U, 0xa4f8bf5635246428U, 0x871b7795e136be99U,
+    0x28e2557b59846e3fU, 0x331aeada2fe589cfU, 0x3ff0d2c85def7621U,
+    0x0fed077a756b53a9U, 0xd3e8495912c62894U, 0x64712dd7abbbd95cU,
+    0xbd8d794d96aacfb3U, 0xecf0d7a0fc5583a0U, 0xf41686c49db57244U,
+    0x311c2875c522ced5U, 0x7d633293366b828bU, 0xae5dff9c02033197U,
+    0xd9f57f830283fdfcU, 0xd072df63c324fd7bU, 0x4247cb9e59f71e6dU,
+    0x52d9be85f074e608U, 0x67902e276c921f8bU, 0x00ba1cd8a3db53b6U,
+    0x80e8a40eccd228a4U, 0x6122cd128006b2cdU, 0x796b805720085f81U,
+    0xcbe3303674053bb0U, 0xbedbfc4411068a9cU, 0xee92fb5515482d44U,
+    0x751bdd152d4d1c4aU, 0xd262d45a78a0635dU, 0x86fb897116c87c34U,
+    0xd45d35e6ae3d4da0U, 0x8974836059cca109U, 0x2bd1a438703fc94bU,
+    0x7b6306a34627ddcfU, 0x1a3bc84c17b1d542U, 0x20caba5f1d9e4a93U,
+    0x547eb47b7282ee9cU, 0xe99e619a4f23aa43U, 0x6405fa00e2ec94d4U,
+    0xde83bc408dd3dd04U, 0x9624ab50b148d445U, 0x3badd624dd9b0957U,
+    0xe54ca5d70a80e5d6U, 0x5e9fcf4ccd211f4cU, 0x7647c3200069671fU,
+    0x29ecd9f40041e073U, 0xf468107100525890U, 0x7182148d4066eeb4U,
+    0xc6f14cd848405530U, 0xb8ada00e5a506a7cU, 0xa6d90811f0e4851cU,
+    0x908f4a166d1da663U, 0x9a598e4e043287feU, 0x40eff1e1853f29fdU,
+    0xd12bee59e68ef47cU, 0x82bb74f8301958ceU, 0xe36a52363c1faf01U,
+    0xdc44e6c3cb279ac1U, 0x29ab103a5ef8c0b9U, 0x7415d448f6b6f0e7U,
+    0x111b495b3464ad21U, 0xcab10dd900beec34U, 0x3d5d514f40eea742U,
+    0x0cb4a5a3112a5112U, 0x47f0e785eaba72abU, 0x59ed216765690f56U,
+    0x306869c13ec3532cU, 0x1e414218c73a13fbU, 0xe5d1929ef90898faU,
+    0xdf45f746b74abf39U, 0x6b8bba8c328eb783U, 0x066ea92f3f326564U,
+    0xc80a537b0efefebdU, 0xbd06742ce95f5f36U, 0x2c48113823b73704U,
+    0xf75a15862ca504c5U, 0x9a984d73dbe722fbU, 0xc13e60d0d2e0ebbaU,
+    0x318df905079926a8U, 0xfdf17746497f7052U, 0xfeb6ea8bedefa633U,
+    0xfe64a52ee96b8fc0U, 0x3dfdce7aa3c673b0U, 0x06bea10ca65c084eU,
+    0x486e494fcff30a62U, 0x5a89dba3c3efccfaU, 0xf89629465a75e01cU,
+    0xf6bbb397f1135823U, 0x746aa07ded582e2cU, 0xa8c2a44eb4571cdcU,
+    0x92f34d62616ce413U, 0x77b020baf9c81d17U, 0x0ace1474dc1d122eU,
+    0x0d819992132456baU, 0x10e1fff697ed6c69U, 0xca8d3ffa1ef463c1U,
+    0xbd308ff8a6b17cb2U, 0xac7cb3f6d05ddbdeU, 0x6bcdf07a423aa96bU,
+    0x86c16c98d2c953c6U, 0xe871c7bf077ba8b7U, 0x11471cd764ad4972U,
+    0xd598e40d3dd89bcfU, 0x4aff1d108d4ec2c3U, 0xcedf722a585139baU,
+    0xc2974eb4ee658828U, 0x733d226229feea32U, 0x0806357d5a3f525fU,
+    0xca07c2dcb0cf26f7U, 0xfc89b393dd02f0b5U, 0xbbac2078d443ace2U,
+    0xd54b944b84aa4c0dU, 0x0a9e795e65d4df11U, 0x4d4617b5ff4a16d5U,
+    0x504bced1bf8e4e45U, 0xe45ec2862f71e1d6U, 0x5d767327bb4e5a4cU,
+    0x3a6a07f8d510f86fU, 0x890489f70a55368bU, 0x2b45ac74ccea842eU,
+    0x3b0b8bc90012929dU, 0x09ce6ebb40173744U, 0xcc420a6a101d0515U,
+    0x9fa946824a12232dU, 0x47939822dc96abf9U, 0x59787e2b93bc56f7U,
+    0x57eb4edb3c55b65aU, 0xede622920b6b23f1U, 0xe95fab368e45ecedU,
+    0x11dbcb0218ebb414U, 0xd652bdc29f26a119U, 0x4be76d3346f0495fU,
+    0x6f70a4400c562ddbU, 0xcb4ccd500f6bb952U, 0x7e2000a41346a7a7U,
+    0x8ed400668c0c28c8U, 0x728900802f0f32faU, 0x4f2b40a03ad2ffb9U,
+    0xe2f610c84987bfa8U, 0x0dd9ca7d2df4d7c9U, 0x91503d1c79720dbbU,
+    0x75a44c6397ce912aU, 0xc986afbe3ee11abaU, 0xfbe85badce996168U,
+    0xfae27299423fb9c3U, 0xdccd879fc967d41aU, 0x5400e987bbc1c920U,
+    0x290123e9aab23b68U, 0xf9a0b6720aaf6521U, 0xf808e40e8d5b3e69U,
+    0xb60b1d1230b20e04U, 0xb1c6f22b5e6f48c2U, 0x1e38aeb6360b1af3U,
+    0x25c6da63c38de1b0U, 0x579c487e5a38ad0eU, 0x2d835a9df0c6d851U,
+    0xf8e431456cf88e65U, 0x1b8e9ecb641b58ffU, 0xe272467e3d222f3fU,
+    0x5b0ed81dcc6abb0fU, 0x98e947129fc2b4e9U, 0x3f2398d747b36224U,
+    0x8eec7f0d19a03aadU, 0x1953cf68300424acU, 0x5fa8c3423c052dd7U,
+    0x3792f412cb06794dU, 0xe2bbd88bbee40bd0U, 0x5b6aceaeae9d0ec4U,
+    0xf245825a5a445275U, 0xeed6e2f0f0d56712U, 0x55464dd69685606bU,
+    0xaa97e14c3c26b886U, 0xd53dd99f4b3066a8U, 0xe546a8038efe4029U,
+    0xde98520472bdd033U, 0x963e66858f6d4440U, 0xdde7001379a44aa8U,
+    0x5560c018580d5d52U, 0xaab8f01e6e10b4a6U, 0xcab3961304ca70e8U,
+    0x3d607b97c5fd0d22U, 0x8cb89a7db77c506aU, 0x77f3608e92adb242U,
+    0x55f038b237591ed3U, 0x6b6c46dec52f6688U, 0x2323ac4b3b3da015U,
+    0xabec975e0a0d081aU, 0x96e7bd358c904a21U, 0x7e50d64177da2e54U,
+    0xdde50bd1d5d0b9e9U, 0x955e4ec64b44e864U, 0xbd5af13bef0b113eU,
+    0xecb1ad8aeacdd58eU, 0x67de18eda5814af2U, 0x80eacf948770ced7U,
+    0xa1258379a94d028dU, 0x096ee45813a04330U, 0x8bca9d6e188853fcU,
+    0x775ea264cf55347dU, 0x95364afe032a819dU, 0x3a83ddbd83f52204U,
+    0xc4926a9672793542U, 0x75b7053c0f178293U, 0x5324c68b12dd6338U,
+    0xd3f6fc16ebca5e03U, 0x88f4bb1ca6bcf584U, 0x2b31e9e3d06c32e5U,
+    0x3aff322e62439fcfU, 0x09befeb9fad487c2U, 0x4c2ebe687989a9b3U,
+    0x0f9d37014bf60a10U, 0x538484c19ef38c94U, 0x2865a5f206b06fb9U,
+    0xf93f87b7442e45d3U, 0xf78f69a51539d748U, 0xb573440e5a884d1bU,
+    0x31680a88f8953030U, 0xfdc20d2b36ba7c3dU, 0x3d32907604691b4cU,
+    0xa63f9a49c2c1b10fU, 0x0fcf80dc33721d53U, 0xd3c36113404ea4a8U,
+    0x645a1cac083126e9U, 0x3d70a3d70a3d70a3U, 0xccccccccccccccccU,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x0000000000000000U, 0x0000000000000000U,
+    0x0000000000000000U, 0x4000000000000000U, 0x5000000000000000U,
+    0xa400000000000000U, 0x4d00000000000000U, 0xf020000000000000U,
+    0x6c28000000000000U, 0xc732000000000000U, 0x3c7f400000000000U,
+    0x4b9f100000000000U, 0x1e86d40000000000U, 0x1314448000000000U,
+    0x17d955a000000000U, 0x5dcfab0800000000U, 0x5aa1cae500000000U,
+    0xf14a3d9e40000000U, 0x6d9ccd05d0000000U, 0xe4820023a2000000U,
+    0xdda2802c8a800000U, 0xd50b2037ad200000U, 0x4526f422cc340000U,
+    0x9670b12b7f410000U, 0x3c0cdd765f114000U, 0xa5880a69fb6ac800U,
+    0x8eea0d047a457a00U, 0x72a4904598d6d880U, 0x47a6da2b7f864750U,
+    0x999090b65f67d924U, 0xfff4b4e3f741cf6dU, 0xbff8f10e7a8921a4U,
+    0xaff72d52192b6a0dU, 0x9bf4f8a69f764490U, 0x02f236d04753d5b4U,
+    0x01d762422c946590U, 0x424d3ad2b7b97ef5U, 0xd2e0898765a7deb2U,
+    0x63cc55f49f88eb2fU, 0x3cbf6b71c76b25fbU, 0x8bef464e3945ef7aU,
+    0x97758bf0e3cbb5acU, 0x3d52eeed1cbea317U, 0x4ca7aaa863ee4bddU,
+    0x8fe8caa93e74ef6aU, 0xb3e2fd538e122b44U, 0x60dbbca87196b616U,
+    0xbc8955e946fe31cdU, 0x6babab6398bdbe41U, 0xc696963c7eed2dd1U,
+    0xfc1e1de5cf543ca2U, 0x3b25a55f43294bcbU, 0x49ef0eb713f39ebeU,
+    0x6e3569326c784337U, 0x49c2c37f07965404U, 0xdc33745ec97be906U,
+    0x69a028bb3ded71a3U, 0xc40832ea0d68ce0cU, 0xf50a3fa490c30190U,
+    0x792667c6da79e0faU, 0x577001b891185938U, 0xed4c0226b55e6f86U,
+    0x544f8158315b05b4U, 0x696361ae3db1c721U, 0x03bc3a19cd1e38e9U,
+    0x04ab48a04065c723U, 0x62eb0d64283f9c76U, 0x3ba5d0bd324f8394U,
+    0xca8f44ec7ee36479U, 0x7e998b13cf4e1ecbU, 0x9e3fedd8c321a67eU,
+    0xc5cfe94ef3ea101eU, 0xbba1f1d158724a12U, 0x2a8a6e45ae8edc97U,
+    0xf52d09d71a3293bdU, 0x593c2626705f9c56U, 0x6f8b2fb00c77836cU,
+    0x0b6dfb9c0f956447U, 0x4724bd4189bd5eacU, 0x58edec91ec2cb657U,
+    0x2f2967b66737e3edU, 0xbd79e0d20082ee74U, 0xecd8590680a3aa11U,
+    0xe80e6f4820cc9495U, 0x3109058d147fdcddU, 0xbd4b46f0599fd415U,
+    0x6c9e18ac7007c91aU, 0x03e2cf6bc604ddb0U, 0x84db8346b786151cU,
+    0xe612641865679a63U, 0x4fcb7e8f3f60c07eU, 0xe3be5e330f38f09dU,
+    0x5cadf5bfd3072cc5U, 0x73d9732fc7c8f7f6U, 0x2867e7fddcdd9afaU,
+    0xb281e1fd541501b8U, 0x1f225a7ca91a4226U, 0x3375788de9b06958U,
+    0x0052d6b1641c83aeU, 0xc0678c5dbd23a49aU, 0xf840b7ba963646e0U,
+    0xb650e5a93bc3d898U, 0xa3e51f138ab4cebeU, 0xc66f336c36b10137U,
+    0xb80b0047445d4184U, 0xa60dc059157491e5U, 0x87c89837ad68db2fU,
+    0x29babe4598c311fbU, 0xf4296dd6fef3d67aU, 0x1899e4a65f58660cU,
+    0x5ec05dcff72e7f8fU, 0x76707543f4fa1f73U, 0x6a06494a791c53a8U,
+    0x0487db9d17636892U, 0x45a9d2845d3c42b6U, 0x0b8a2392ba45a9b2U,
+    0x8e6cac7768d7141eU, 0x3207d795430cd926U, 0x7f44e6bd49e807b8U,
+    0x5f16206c9c6209a6U, 0x36dba887c37a8c0fU, 0xc2494954da2c9789U,
+    0xf2db9baa10b7bd6cU, 0x6f92829494e5acc7U, 0xcb772339ba1f17f9U,
+    0xff2a760414536efbU, 0xfef5138519684abaU, 0x7eb258665fc25d69U,
+    0xef2f773ffbd97a61U, 0xaafb550ffacfd8faU, 0x95ba2a53f983cf38U,
+    0xdd945a747bf26183U, 0x94f971119aeef9e4U, 0x7a37cd5601aab85dU,
+    0xac62e055c10ab33aU, 0x577b986b314d6009U, 0xed5a7e85fda0b80bU,
+    0x14588f13be847307U, 0x596eb2d8ae258fc8U, 0x6fca5f8ed9aef3bbU,
+    0x25de7bb9480d5854U, 0xaf561aa79a10ae6aU, 0x1b2ba1518094da04U,
+    0x90fb44d2f05d0842U, 0x353a1607ac744a53U, 0x42889b8997915ce8U,
+    0x69956135febada11U, 0x43fab9837e699095U, 0x94f967e45e03f4bbU,
+    0x1d1be0eebac278f5U, 0x6462d92a69731732U, 0x7d7b8f7503cfdcfeU,
+    0x5cda735244c3d43eU, 0x3a0888136afa64a7U, 0x088aaa1845b8fdd0U,
+    0x8aad549e57273d45U, 0x36ac54e2f678864bU, 0x84576a1bb416a7ddU,
+    0x656d44a2a11c51d5U, 0x9f644ae5a4b1b325U, 0x873d5d9f0dde1feeU,
+    0xa90cb506d155a7eaU, 0x09a7f12442d588f2U, 0x0c11ed6d538aeb2fU,
+    0x8f1668c8a86da5faU, 0xf96e017d694487bcU, 0x37c981dcc395a9acU,
+    0x85bbe253f47b1417U, 0x93956d7478ccec8eU, 0x387ac8d1970027b2U,
+    0x06997b05fcc0319eU, 0x441fece3bdf81f03U, 0xd527e81cad7626c3U,
+    0x8a71e223d8d3b074U, 0xf6872d5667844e49U, 0xb428f8ac016561dbU,
+    0xe13336d701beba52U, 0xecc0024661173473U, 0x27f002d7f95d0190U,
+    0x31ec038df7b441f4U, 0x7e67047175a15271U, 0x0f0062c6e984d386U,
+    0x52c07b78a3e60868U, 0xa7709a56ccdf8a82U, 0x88a66076400bb691U,
+    0x6acff893d00ea435U, 0x0583f6b8c4124d43U, 0xc3727a337a8b704aU,
+    0x744f18c0592e4c5cU, 0x1162def06f79df73U, 0x8addcb5645ac2ba8U,
+    0x6d953e2bd7173692U, 0xc8fa8db6ccdd0437U, 0x1d9c9892400a22a2U,
+    0x2503beb6d00cab4bU, 0x2e44ae64840fd61dU, 0x5ceaecfed289e5d2U,
+    0x7425a83e872c5f47U, 0xd12f124e28f77719U, 0x82bd6b70d99aaa6fU,
+    0x636cc64d1001550bU, 0x3c47f7e05401aa4eU, 0x65acfaec34810a71U,
+    0x7f1839a741a14d0dU, 0x1ede48111209a050U, 0x934aed0aab460432U,
+    0xf81da84d5617853fU, 0x36251260ab9d668eU, 0xc1d72b7c6b426019U,
+    0xb24cf65b8612f81fU, 0xdee033f26797b627U, 0x169840ef017da3b1U,
+    0x8e1f289560ee864eU, 0xf1a6f2bab92a27e2U, 0xae10af696774b1dbU,
+    0xacca6da1e0a8ef29U, 0x17fd090a58d32af3U, 0xddfc4b4cef07f5b0U,
+    0x4abdaf101564f98eU, 0x9d6d1ad41abe37f1U, 0x84c86189216dc5edU,
+    0x32fd3cf5b4e49bb4U, 0x3fbc8c33221dc2a1U, 0x0fabaf3feaa5334aU,
+    0x29cb4d87f2a7400eU, 0x743e20e9ef511012U, 0x914da9246b255416U,
+    0x1ad089b6c2f7548eU, 0xa184ac2473b529b1U, 0xc9e5d72d90a2741eU,
+    0x7e2fa67c7a658892U, 0xddbb901b98feeab7U, 0x552a74227f3ea565U,
+    0xd53a88958f87275fU, 0x8a892abaf368f137U, 0x2d2b7569b0432d85U,
+    0x9c3b29620e29fc73U, 0x8349f3ba91b47b8fU, 0x241c70a936219a73U,
+    0xed238cd383aa0110U, 0xf4363804324a40aaU, 0xb143c6053edcd0d5U,
+    0xdd94b7868e94050aU, 0xca7cf2b4191c8326U, 0xfd1c2f611f63a3f0U,
+    0xbc633b39673c8cecU, 0xd5be0503e085d813U, 0x4b2d8644d8a74e18U,
+    0xddf8e7d60ed1219eU, 0xcabb90e5c942b503U, 0x3d6a751f3b936243U,
+    0x0cc512670a783ad4U, 0x27fb2b80668b24c5U, 0xb1f9f660802dedf6U,
+    0x5e7873f8a0396973U, 0xdb0b487b6423e1e8U, 0x91ce1a9a3d2cda62U,
+    0x7641a140cc7810fbU, 0xa9e904c87fcb0a9dU, 0x546345fa9fbdcd44U,
+    0xa97c177947ad4095U, 0x49ed8eabcccc485dU, 0x5c68f256bfff5a74U,
+    0x73832eec6fff3111U, 0xc831fd53c5ff7eabU, 0xba3e7ca8b77f5e55U,
+    0x28ce1bd2e55f35ebU, 0x7980d163cf5b81b3U, 0xd7e105bcc332621fU,
+    0x8dd9472bf3fefaa7U, 0xb14f98f6f0feb951U, 0x6ed1bf9a569f33d3U,
+    0x0a862f80ec4700c8U, 0xcd27bb612758c0faU, 0x8038d51cb897789cU,
+    0xe0470a63e6bd56c3U, 0x1858ccfce06cac74U, 0x0f37801e0c43ebc8U,
+    0xd30560258f54e6baU, 0x47c6b82ef32a2069U, 0x4cdc331d57fa5441U,
+    0xe0133fe4adf8e952U, 0x58180fddd97723a6U, 0x570f09eaa7ea7648U,
 };
 
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/strings/cord.cc b/third_party/abseil-cpp/absl/strings/cord.cc
index 854047ca98..92822c0588 100644
--- a/third_party/abseil-cpp/absl/strings/cord.cc
+++ b/third_party/abseil-cpp/absl/strings/cord.cc
@@ -20,6 +20,7 @@
 #include <cstdio>
 #include <cstdlib>
 #include <iomanip>
+#include <ios>
 #include <iostream>
 #include <limits>
 #include <ostream>
@@ -34,9 +35,12 @@
 #include "absl/base/port.h"
 #include "absl/container/fixed_array.h"
 #include "absl/container/inlined_vector.h"
+#include "absl/strings/cord_buffer.h"
 #include "absl/strings/escaping.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
+#include "absl/strings/internal/cord_rep_crc.h"
 #include "absl/strings/internal/cord_rep_flat.h"
 #include "absl/strings/internal/cordz_statistics.h"
 #include "absl/strings/internal/cordz_update_scope.h"
@@ -52,7 +56,7 @@ ABSL_NAMESPACE_BEGIN
 
 using ::absl::cord_internal::CordRep;
 using ::absl::cord_internal::CordRepBtree;
-using ::absl::cord_internal::CordRepConcat;
+using ::absl::cord_internal::CordRepCrc;
 using ::absl::cord_internal::CordRepExternal;
 using ::absl::cord_internal::CordRepFlat;
 using ::absl::cord_internal::CordRepSubstring;
@@ -64,56 +68,6 @@ using ::absl::cord_internal::kMinFlatLength;
 using ::absl::cord_internal::kInlinedVectorSize;
 using ::absl::cord_internal::kMaxBytesToCopy;
 
-constexpr uint64_t Fibonacci(unsigned char n, uint64_t a = 0, uint64_t b = 1) {
-  return n == 0 ? a : Fibonacci(n - 1, b, a + b);
-}
-
-static_assert(Fibonacci(63) == 6557470319842,
-              "Fibonacci values computed incorrectly");
-
-// Minimum length required for a given depth tree -- a tree is considered
-// balanced if
-//      length(t) >= min_length[depth(t)]
-// The root node depth is allowed to become twice as large to reduce rebalancing
-// for larger strings (see IsRootBalanced).
-static constexpr uint64_t min_length[] = {
-    Fibonacci(2),          Fibonacci(3),  Fibonacci(4),  Fibonacci(5),
-    Fibonacci(6),          Fibonacci(7),  Fibonacci(8),  Fibonacci(9),
-    Fibonacci(10),         Fibonacci(11), Fibonacci(12), Fibonacci(13),
-    Fibonacci(14),         Fibonacci(15), Fibonacci(16), Fibonacci(17),
-    Fibonacci(18),         Fibonacci(19), Fibonacci(20), Fibonacci(21),
-    Fibonacci(22),         Fibonacci(23), Fibonacci(24), Fibonacci(25),
-    Fibonacci(26),         Fibonacci(27), Fibonacci(28), Fibonacci(29),
-    Fibonacci(30),         Fibonacci(31), Fibonacci(32), Fibonacci(33),
-    Fibonacci(34),         Fibonacci(35), Fibonacci(36), Fibonacci(37),
-    Fibonacci(38),         Fibonacci(39), Fibonacci(40), Fibonacci(41),
-    Fibonacci(42),         Fibonacci(43), Fibonacci(44), Fibonacci(45),
-    Fibonacci(46),         Fibonacci(47),
-    0xffffffffffffffffull,  // Avoid overflow
-};
-
-static const int kMinLengthSize = ABSL_ARRAYSIZE(min_length);
-
-static inline bool btree_enabled() {
-  return cord_internal::cord_btree_enabled.load(
-      std::memory_order_relaxed);
-}
-
-static inline bool IsRootBalanced(CordRep* node) {
-  if (!node->IsConcat()) {
-    return true;
-  } else if (node->concat()->depth() <= 15) {
-    return true;
-  } else if (node->concat()->depth() > kMinLengthSize) {
-    return false;
-  } else {
-    // Allow depth to become twice as large as implied by fibonacci rule to
-    // reduce rebalancing for larger strings.
-    return (node->length >= min_length[node->concat()->depth() / 2]);
-  }
-}
-
-static CordRep* Rebalance(CordRep* node);
 static void DumpNode(CordRep* rep, bool include_data, std::ostream* os,
                      int indent = 0);
 static bool VerifyNode(CordRep* root, CordRep* start_node,
@@ -135,75 +89,6 @@ static inline CordRep* VerifyTree(CordRep* node) {
   return node;
 }
 
-// Return the depth of a node
-static int Depth(const CordRep* rep) {
-  if (rep->IsConcat()) {
-    return rep->concat()->depth();
-  } else {
-    return 0;
-  }
-}
-
-static void SetConcatChildren(CordRepConcat* concat, CordRep* left,
-                              CordRep* right) {
-  concat->left = left;
-  concat->right = right;
-
-  concat->length = left->length + right->length;
-  concat->set_depth(1 + std::max(Depth(left), Depth(right)));
-}
-
-// Create a concatenation of the specified nodes.
-// Does not change the refcounts of "left" and "right".
-// The returned node has a refcount of 1.
-static CordRep* RawConcat(CordRep* left, CordRep* right) {
-  // Avoid making degenerate concat nodes (one child is empty)
-  if (left == nullptr) return right;
-  if (right == nullptr) return left;
-  if (left->length == 0) {
-    CordRep::Unref(left);
-    return right;
-  }
-  if (right->length == 0) {
-    CordRep::Unref(right);
-    return left;
-  }
-
-  CordRepConcat* rep = new CordRepConcat();
-  rep->tag = cord_internal::CONCAT;
-  SetConcatChildren(rep, left, right);
-
-  return rep;
-}
-
-static CordRep* Concat(CordRep* left, CordRep* right) {
-  CordRep* rep = RawConcat(left, right);
-  if (rep != nullptr && !IsRootBalanced(rep)) {
-    rep = Rebalance(rep);
-  }
-  return VerifyTree(rep);
-}
-
-// Make a balanced tree out of an array of leaf nodes.
-static CordRep* MakeBalancedTree(CordRep** reps, size_t n) {
-  // Make repeated passes over the array, merging adjacent pairs
-  // until we are left with just a single node.
-  while (n > 1) {
-    size_t dst = 0;
-    for (size_t src = 0; src < n; src += 2) {
-      if (src + 1 < n) {
-        reps[dst] = Concat(reps[src], reps[src + 1]);
-      } else {
-        reps[dst] = reps[src];
-      }
-      dst++;
-    }
-    n = dst;
-  }
-
-  return reps[0];
-}
-
 static CordRepFlat* CreateFlat(const char* data, size_t length,
                                size_t alloc_hint) {
   CordRepFlat* flat = CordRepFlat::New(length + alloc_hint);
@@ -229,21 +114,7 @@ static CordRep* NewBtree(const char* data, size_t length, size_t alloc_hint) {
 // The returned node has a refcount of 1.
 static CordRep* NewTree(const char* data, size_t length, size_t alloc_hint) {
   if (length == 0) return nullptr;
-  if (btree_enabled()) {
-    return NewBtree(data, length, alloc_hint);
-  }
-  absl::FixedArray<CordRep*> reps((length - 1) / kMaxFlatLength + 1);
-  size_t n = 0;
-  do {
-    const size_t len = std::min(length, kMaxFlatLength);
-    CordRepFlat* rep = CordRepFlat::New(len + alloc_hint);
-    rep->length = len;
-    memcpy(rep->Data(), data, len);
-    reps[n++] = VerifyTree(rep);
-    data += len;
-    length -= len;
-  } while (length != 0);
-  return MakeBalancedTree(reps.data(), n);
+  return NewBtree(data, length, alloc_hint);
 }
 
 namespace cord_internal {
@@ -258,22 +129,6 @@ void InitializeCordRepExternal(absl::string_view data, CordRepExternal* rep) {
 
 }  // namespace cord_internal
 
-static CordRep* NewSubstring(CordRep* child, size_t offset, size_t length) {
-  // Never create empty substring nodes
-  if (length == 0) {
-    CordRep::Unref(child);
-    return nullptr;
-  } else {
-    CordRepSubstring* rep = new CordRepSubstring();
-    assert((offset + length) <= child->length);
-    rep->length = length;
-    rep->tag = cord_internal::SUBSTRING;
-    rep->start = offset;
-    rep->child = child;
-    return VerifyTree(rep);
-  }
-}
-
 // Creates a CordRep from the provided string. If the string is large enough,
 // and not wasteful, we move the string into an external cord rep, preserving
 // the already allocated string contents.
@@ -306,13 +161,14 @@ static CordRep* CordRepFromString(std::string&& src) {
 // --------------------------------------------------------------------
 // Cord::InlineRep functions
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 constexpr unsigned char Cord::InlineRep::kMaxInline;
+#endif
 
-inline void Cord::InlineRep::set_data(const char* data, size_t n,
-                                      bool nullify_tail) {
+inline void Cord::InlineRep::set_data(const char* data, size_t n) {
   static_assert(kMaxInline == 15, "set_data is hard-coded for a length of 15");
 
-  cord_internal::SmallMemmove(data_.as_chars(), data, n, nullify_tail);
+  cord_internal::SmallMemmove<true>(data_.as_chars(), data, n);
   set_inline_size(n);
 }
 
@@ -329,7 +185,7 @@ inline void Cord::InlineRep::reduce_size(size_t n) {
   assert(tag >= n);
   tag -= n;
   memset(data_.as_chars() + tag, 0, n);
-  set_inline_size(static_cast<char>(tag));
+  set_inline_size(tag);
 }
 
 inline void Cord::InlineRep::remove_prefix(size_t n) {
@@ -341,7 +197,9 @@ inline void Cord::InlineRep::remove_prefix(size_t n) {
 // Returns `rep` converted into a CordRepBtree.
 // Directly returns `rep` if `rep` is already a CordRepBtree.
 static CordRepBtree* ForceBtree(CordRep* rep) {
-  return rep->IsBtree() ? rep->btree() : CordRepBtree::Create(rep);
+  return rep->IsBtree()
+             ? rep->btree()
+             : CordRepBtree::Create(cord_internal::RemoveCrcNode(rep));
 }
 
 void Cord::InlineRep::AppendTreeToInlined(CordRep* tree,
@@ -349,11 +207,7 @@ void Cord::InlineRep::AppendTreeToInlined(CordRep* tree,
   assert(!is_tree());
   if (!data_.is_empty()) {
     CordRepFlat* flat = MakeFlatWithExtraCapacity(0);
-    if (btree_enabled()) {
-      tree = CordRepBtree::Append(CordRepBtree::Create(flat), tree);
-    } else {
-      tree = Concat(flat, tree);
-    }
+    tree = CordRepBtree::Append(CordRepBtree::Create(flat), tree);
   }
   EmplaceTree(tree, method);
 }
@@ -361,16 +215,14 @@ void Cord::InlineRep::AppendTreeToInlined(CordRep* tree,
 void Cord::InlineRep::AppendTreeToTree(CordRep* tree, MethodIdentifier method) {
   assert(is_tree());
   const CordzUpdateScope scope(data_.cordz_info(), method);
-  if (btree_enabled()) {
-    tree = CordRepBtree::Append(ForceBtree(data_.as_tree()), tree);
-  } else {
-    tree = Concat(data_.as_tree(), tree);
-  }
+  tree = CordRepBtree::Append(ForceBtree(data_.as_tree()), tree);
   SetTree(tree, scope);
 }
 
 void Cord::InlineRep::AppendTree(CordRep* tree, MethodIdentifier method) {
-  if (tree == nullptr) return;
+  assert(tree != nullptr);
+  assert(tree->length != 0);
+  assert(!tree->IsCrc());
   if (data_.is_tree()) {
     AppendTreeToTree(tree, method);
   } else {
@@ -383,11 +235,7 @@ void Cord::InlineRep::PrependTreeToInlined(CordRep* tree,
   assert(!is_tree());
   if (!data_.is_empty()) {
     CordRepFlat* flat = MakeFlatWithExtraCapacity(0);
-    if (btree_enabled()) {
-      tree = CordRepBtree::Prepend(CordRepBtree::Create(flat), tree);
-    } else {
-      tree = Concat(tree, flat);
-    }
+    tree = CordRepBtree::Prepend(CordRepBtree::Create(flat), tree);
   }
   EmplaceTree(tree, method);
 }
@@ -396,16 +244,14 @@ void Cord::InlineRep::PrependTreeToTree(CordRep* tree,
                                         MethodIdentifier method) {
   assert(is_tree());
   const CordzUpdateScope scope(data_.cordz_info(), method);
-  if (btree_enabled()) {
-    tree = CordRepBtree::Prepend(ForceBtree(data_.as_tree()), tree);
-  } else {
-    tree = Concat(tree, data_.as_tree());
-  }
+  tree = CordRepBtree::Prepend(ForceBtree(data_.as_tree()), tree);
   SetTree(tree, scope);
 }
 
 void Cord::InlineRep::PrependTree(CordRep* tree, MethodIdentifier method) {
   assert(tree != nullptr);
+  assert(tree->length != 0);
+  assert(!tree->IsCrc());
   if (data_.is_tree()) {
     PrependTreeToTree(tree, method);
   } else {
@@ -419,7 +265,7 @@ void Cord::InlineRep::PrependTree(CordRep* tree, MethodIdentifier method) {
 // written to region and the actual size increase will be written to size.
 static inline bool PrepareAppendRegion(CordRep* root, char** region,
                                        size_t* size, size_t max_length) {
-  if (root->IsBtree() && root->refcount.IsMutable()) {
+  if (root->IsBtree() && root->refcount.IsOne()) {
     Span<char> span = root->btree()->GetAppendBuffer(max_length);
     if (!span.empty()) {
       *region = span.data();
@@ -428,13 +274,8 @@ static inline bool PrepareAppendRegion(CordRep* root, char** region,
     }
   }
 
-  // Search down the right-hand path for a non-full FLAT node.
   CordRep* dst = root;
-  while (dst->IsConcat() && dst->refcount.IsMutable()) {
-    dst = dst->concat()->right;
-  }
-
-  if (!dst->IsFlat() || !dst->refcount.IsMutable()) {
+  if (!dst->IsFlat() || !dst->refcount.IsOne()) {
     *region = nullptr;
     *size = 0;
     return false;
@@ -448,12 +289,7 @@ static inline bool PrepareAppendRegion(CordRep* root, char** region,
     return false;
   }
 
-  size_t size_increase = std::min(capacity - in_use, max_length);
-
-  // We need to update the length fields for all nodes, including the leaf node.
-  for (CordRep* rep = root; rep != dst; rep = rep->concat()->right) {
-    rep->length += size_increase;
-  }
+  const size_t size_increase = std::min(capacity - in_use, max_length);
   dst->length += size_increase;
 
   *region = dst->flat()->Data() + in_use;
@@ -461,90 +297,6 @@ static inline bool PrepareAppendRegion(CordRep* root, char** region,
   return true;
 }
 
-template <bool has_length>
-void Cord::InlineRep::GetAppendRegion(char** region, size_t* size,
-                                      size_t length) {
-  auto constexpr method = CordzUpdateTracker::kGetAppendRegion;
-
-  CordRep* root = tree();
-  size_t sz = root ? root->length : inline_size();
-  if (root == nullptr) {
-    size_t available = kMaxInline - sz;
-    if (available >= (has_length ? length : 1)) {
-      *region = data_.as_chars() + sz;
-      *size = has_length ? length : available;
-      set_inline_size(has_length ? sz + length : kMaxInline);
-      return;
-    }
-  }
-
-  size_t extra = has_length ? length : (std::max)(sz, kMinFlatLength);
-  CordRep* rep = root ? root : MakeFlatWithExtraCapacity(extra);
-  CordzUpdateScope scope(root ? data_.cordz_info() : nullptr, method);
-  if (PrepareAppendRegion(rep, region, size, length)) {
-    CommitTree(root, rep, scope, method);
-    return;
-  }
-
-  // Allocate new node.
-  CordRepFlat* new_node = CordRepFlat::New(extra);
-  new_node->length = std::min(new_node->Capacity(), length);
-  *region = new_node->Data();
-  *size = new_node->length;
-
-  if (btree_enabled()) {
-    rep = CordRepBtree::Append(ForceBtree(rep), new_node);
-  } else {
-    rep = Concat(rep, new_node);
-  }
-  CommitTree(root, rep, scope, method);
-}
-
-// Computes the memory side of the provided edge which must be a valid data edge
-// for a btrtee, i.e., a FLAT, EXTERNAL or SUBSTRING of a FLAT or EXTERNAL node.
-static bool RepMemoryUsageDataEdge(const CordRep* rep,
-                                   size_t* total_mem_usage) {
-  size_t maybe_sub_size = 0;
-  if (ABSL_PREDICT_FALSE(rep->IsSubstring())) {
-    maybe_sub_size = sizeof(cord_internal::CordRepSubstring);
-    rep = rep->substring()->child;
-  }
-  if (rep->IsFlat()) {
-    *total_mem_usage += maybe_sub_size + rep->flat()->AllocatedSize();
-    return true;
-  }
-  if (rep->IsExternal()) {
-    // We don't know anything about the embedded / bound data, but we can safely
-    // assume it is 'at least' a word / pointer to data. In the future we may
-    // choose to use the 'data' byte as a tag to identify the types of some
-    // well-known externals, such as a std::string instance.
-    *total_mem_usage += maybe_sub_size +
-                        sizeof(cord_internal::CordRepExternalImpl<intptr_t>) +
-                        rep->length;
-    return true;
-  }
-  return false;
-}
-
-// If the rep is a leaf, this will increment the value at total_mem_usage and
-// will return true.
-static bool RepMemoryUsageLeaf(const CordRep* rep, size_t* total_mem_usage) {
-  if (rep->IsFlat()) {
-    *total_mem_usage += rep->flat()->AllocatedSize();
-    return true;
-  }
-  if (rep->IsExternal()) {
-    // We don't know anything about the embedded / bound data, but we can safely
-    // assume it is 'at least' a word / pointer to data. In the future we may
-    // choose to use the 'data' byte as a tag to identify the types of some
-    // well-known externals, such as a std::string instance.
-    *total_mem_usage +=
-        sizeof(cord_internal::CordRepExternalImpl<intptr_t>) + rep->length;
-    return true;
-  }
-  return false;
-}
-
 void Cord::InlineRep::AssignSlow(const Cord::InlineRep& src) {
   assert(&src != this);
   assert(is_tree() || src.is_tree());
@@ -581,7 +333,7 @@ Cord::Cord(absl::string_view src, MethodIdentifier method)
     : contents_(InlineData::kDefaultInit) {
   const size_t n = src.size();
   if (n <= InlineRep::kMaxInline) {
-    contents_.set_data(src.data(), n, true);
+    contents_.set_data(src.data(), n);
   } else {
     CordRep* rep = NewTree(src.data(), n, 0);
     contents_.EmplaceTree(rep, method);
@@ -591,7 +343,7 @@ Cord::Cord(absl::string_view src, MethodIdentifier method)
 template <typename T, Cord::EnableIfString<T>>
 Cord::Cord(T&& src) : contents_(InlineData::kDefaultInit) {
   if (src.size() <= InlineRep::kMaxInline) {
-    contents_.set_data(src.data(), src.size(), true);
+    contents_.set_data(src.data(), src.size());
   } else {
     CordRep* rep = CordRepFromString(std::forward<T>(src));
     contents_.EmplaceTree(rep, CordzUpdateTracker::kConstructorString);
@@ -642,14 +394,14 @@ Cord& Cord::operator=(absl::string_view src) {
     // - MaybeUntrackCord must be called before set_data() clobbers cordz_info.
     // - set_data() must be called before Unref(tree) as it may reference tree.
     if (tree != nullptr) CordzInfo::MaybeUntrackCord(contents_.cordz_info());
-    contents_.set_data(data, length, true);
+    contents_.set_data(data, length);
     if (tree != nullptr) CordRep::Unref(tree);
     return *this;
   }
   if (tree != nullptr) {
     CordzUpdateScope scope(contents_.cordz_info(), method);
     if (tree->IsFlat() && tree->flat()->Capacity() >= length &&
-        tree->refcount.IsMutable()) {
+        tree->refcount.IsOne()) {
       // Copy in place if the existing FLAT node is reusable.
       memmove(tree->flat()->Data(), data, length);
       tree->length = length;
@@ -668,6 +420,7 @@ Cord& Cord::operator=(absl::string_view src) {
 // we keep it here to make diffs easier.
 void Cord::InlineRep::AppendArray(absl::string_view src,
                                   MethodIdentifier method) {
+  MaybeRemoveEmptyCrcNode();
   if (src.empty()) return;  // memcpy(_, nullptr, 0) is undefined.
 
   size_t appended = 0;
@@ -675,6 +428,7 @@ void Cord::InlineRep::AppendArray(absl::string_view src,
   const CordRep* const root = rep;
   CordzUpdateScope scope(root ? cordz_info() : nullptr, method);
   if (root != nullptr) {
+    rep = cord_internal::RemoveCrcNode(rep);
     char* region;
     if (PrepareAppendRegion(rep, &region, &appended, src.size())) {
       memcpy(region, src.data(), appended);
@@ -705,27 +459,11 @@ void Cord::InlineRep::AppendArray(absl::string_view src,
     return;
   }
 
-  if (btree_enabled()) {
-    // TODO(b/192061034): keep legacy 10% growth rate: consider other rates.
-    rep = ForceBtree(rep);
-    const size_t min_growth = std::max<size_t>(rep->length / 10, src.size());
-    rep = CordRepBtree::Append(rep->btree(), src, min_growth - src.size());
-  } else {
-    // Use new block(s) for any remaining bytes that were not handled above.
-    // Alloc extra memory only if the right child of the root of the new tree
-    // is going to be a FLAT node, which will permit further inplace appends.
-    size_t length = src.size();
-    if (src.size() < kMaxFlatLength) {
-      // The new length is either
-      // - old size + 10%
-      // - old_size + src.size()
-      // This will cause a reasonable conservative step-up in size that is
-      // still large enough to avoid excessive amounts of small fragments
-      // being added.
-      length = std::max<size_t>(rep->length / 10, src.size());
-    }
-    rep = Concat(rep, NewTree(src.data(), src.size(), length - src.size()));
-  }
+  // TODO(b/192061034): keep legacy 10% growth rate: consider other rates.
+  rep = ForceBtree(rep);
+  const size_t min_growth = std::max<size_t>(rep->length / 10, src.size());
+  rep = CordRepBtree::Append(rep->btree(), src, min_growth - src.size());
+
   CommitTree(root, rep, scope, method);
 }
 
@@ -742,11 +480,16 @@ inline CordRep* Cord::TakeRep() && {
 template <typename C>
 inline void Cord::AppendImpl(C&& src) {
   auto constexpr method = CordzUpdateTracker::kAppendCord;
+
+  contents_.MaybeRemoveEmptyCrcNode();
+  if (src.empty()) return;
+
   if (empty()) {
     // Since destination is empty, we can avoid allocating a node,
     if (src.contents_.is_tree()) {
       // by taking the tree directly
-      CordRep* rep = std::forward<C>(src).TakeRep();
+      CordRep* rep =
+          cord_internal::RemoveCrcNode(std::forward<C>(src).TakeRep());
       contents_.EmplaceTree(rep, method);
     } else {
       // or copying over inline data
@@ -782,10 +525,56 @@ inline void Cord::AppendImpl(C&& src) {
   }
 
   // Guaranteed to be a tree (kMaxBytesToCopy > kInlinedSize)
-  CordRep* rep = std::forward<C>(src).TakeRep();
+  CordRep* rep = cord_internal::RemoveCrcNode(std::forward<C>(src).TakeRep());
   contents_.AppendTree(rep, CordzUpdateTracker::kAppendCord);
 }
 
+static CordRep::ExtractResult ExtractAppendBuffer(CordRep* rep,
+                                                  size_t min_capacity) {
+  switch (rep->tag) {
+    case cord_internal::BTREE:
+      return CordRepBtree::ExtractAppendBuffer(rep->btree(), min_capacity);
+    default:
+      if (rep->IsFlat() && rep->refcount.IsOne() &&
+          rep->flat()->Capacity() - rep->length >= min_capacity) {
+        return {nullptr, rep};
+      }
+      return {rep, nullptr};
+  }
+}
+
+static CordBuffer CreateAppendBuffer(InlineData& data, size_t block_size,
+                                     size_t capacity) {
+  // Watch out for overflow, people can ask for size_t::max().
+  const size_t size = data.inline_size();
+  const size_t max_capacity = std::numeric_limits<size_t>::max() - size;
+  capacity = (std::min)(max_capacity, capacity) + size;
+  CordBuffer buffer =
+      block_size ? CordBuffer::CreateWithCustomLimit(block_size, capacity)
+                 : CordBuffer::CreateWithDefaultLimit(capacity);
+  cord_internal::SmallMemmove(buffer.data(), data.as_chars(), size);
+  buffer.SetLength(size);
+  data = {};
+  return buffer;
+}
+
+CordBuffer Cord::GetAppendBufferSlowPath(size_t block_size, size_t capacity,
+                                         size_t min_capacity) {
+  auto constexpr method = CordzUpdateTracker::kGetAppendBuffer;
+  CordRep* tree = contents_.tree();
+  if (tree != nullptr) {
+    CordzUpdateScope scope(contents_.cordz_info(), method);
+    CordRep::ExtractResult result = ExtractAppendBuffer(tree, min_capacity);
+    if (result.extracted != nullptr) {
+      contents_.SetTreeOrEmpty(result.tree, scope);
+      return CordBuffer(result.extracted->flat());
+    }
+    return block_size ? CordBuffer::CreateWithCustomLimit(block_size, capacity)
+                      : CordBuffer::CreateWithDefaultLimit(capacity);
+  }
+  return CreateAppendBuffer(contents_.data_, block_size, capacity);
+}
+
 void Cord::Append(const Cord& src) {
   AppendImpl(src);
 }
@@ -807,10 +596,14 @@ void Cord::Append(T&& src) {
 template void Cord::Append(std::string&& src);
 
 void Cord::Prepend(const Cord& src) {
+  contents_.MaybeRemoveEmptyCrcNode();
+  if (src.empty()) return;
+
   CordRep* src_tree = src.contents_.tree();
   if (src_tree != nullptr) {
     CordRep::Ref(src_tree);
-    contents_.PrependTree(src_tree, CordzUpdateTracker::kPrependCord);
+    contents_.PrependTree(cord_internal::RemoveCrcNode(src_tree),
+                          CordzUpdateTracker::kPrependCord);
     return;
   }
 
@@ -820,16 +613,18 @@ void Cord::Prepend(const Cord& src) {
 }
 
 void Cord::PrependArray(absl::string_view src, MethodIdentifier method) {
+  contents_.MaybeRemoveEmptyCrcNode();
   if (src.empty()) return;  // memcpy(_, nullptr, 0) is undefined.
+
   if (!contents_.is_tree()) {
     size_t cur_size = contents_.inline_size();
     if (cur_size + src.size() <= InlineRep::kMaxInline) {
       // Use embedded storage.
-      char data[InlineRep::kMaxInline + 1] = {0};
-      memcpy(data, src.data(), src.size());
-      memcpy(data + src.size(), contents_.data(), cur_size);
-      memcpy(contents_.data_.as_chars(), data, InlineRep::kMaxInline + 1);
-      contents_.set_inline_size(cur_size + src.size());
+      InlineData data;
+      memcpy(data.as_chars(), src.data(), src.size());
+      memcpy(data.as_chars() + src.size(), contents_.data(), cur_size);
+      data.set_inline_size(cur_size + src.size());
+      contents_.data_ = data;
       return;
     }
   }
@@ -837,121 +632,71 @@ void Cord::PrependArray(absl::string_view src, MethodIdentifier method) {
   contents_.PrependTree(rep, method);
 }
 
-template <typename T, Cord::EnableIfString<T>>
-inline void Cord::Prepend(T&& src) {
-  if (src.size() <= kMaxBytesToCopy) {
-    Prepend(absl::string_view(src));
+void Cord::AppendPrecise(absl::string_view src, MethodIdentifier method) {
+  assert(!src.empty());
+  assert(src.size() <= cord_internal::kMaxFlatLength);
+  if (contents_.remaining_inline_capacity() >= src.size()) {
+    const size_t inline_length = contents_.inline_size();
+    memcpy(contents_.data_.as_chars() + inline_length, src.data(), src.size());
+    contents_.set_inline_size(inline_length + src.size());
   } else {
-    CordRep* rep = CordRepFromString(std::forward<T>(src));
-    contents_.PrependTree(rep, CordzUpdateTracker::kPrependString);
+    contents_.AppendTree(CordRepFlat::Create(src), method);
   }
 }
 
-template void Cord::Prepend(std::string&& src);
-
-static CordRep* RemovePrefixFrom(CordRep* node, size_t n) {
-  if (n >= node->length) return nullptr;
-  if (n == 0) return CordRep::Ref(node);
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> rhs_stack;
-
-  while (node->IsConcat()) {
-    assert(n <= node->length);
-    if (n < node->concat()->left->length) {
-      // Push right to stack, descend left.
-      rhs_stack.push_back(node->concat()->right);
-      node = node->concat()->left;
-    } else {
-      // Drop left, descend right.
-      n -= node->concat()->left->length;
-      node = node->concat()->right;
-    }
-  }
-  assert(n <= node->length);
-
-  if (n == 0) {
-    CordRep::Ref(node);
+void Cord::PrependPrecise(absl::string_view src, MethodIdentifier method) {
+  assert(!src.empty());
+  assert(src.size() <= cord_internal::kMaxFlatLength);
+  if (contents_.remaining_inline_capacity() >= src.size()) {
+    const size_t cur_size = contents_.inline_size();
+    InlineData data;
+    memcpy(data.as_chars(), src.data(), src.size());
+    memcpy(data.as_chars() + src.size(), contents_.data(), cur_size);
+    data.set_inline_size(cur_size + src.size());
+    contents_.data_ = data;
   } else {
-    size_t start = n;
-    size_t len = node->length - n;
-    if (node->IsSubstring()) {
-      // Consider in-place update of node, similar to in RemoveSuffixFrom().
-      start += node->substring()->start;
-      node = node->substring()->child;
-    }
-    node = NewSubstring(CordRep::Ref(node), start, len);
+    contents_.PrependTree(CordRepFlat::Create(src), method);
   }
-  while (!rhs_stack.empty()) {
-    node = Concat(node, CordRep::Ref(rhs_stack.back()));
-    rhs_stack.pop_back();
-  }
-  return node;
 }
 
-// RemoveSuffixFrom() is very similar to RemovePrefixFrom(), with the
-// exception that removing a suffix has an optimization where a node may be
-// edited in place iff that node and all its ancestors have a refcount of 1.
-static CordRep* RemoveSuffixFrom(CordRep* node, size_t n) {
-  if (n >= node->length) return nullptr;
-  if (n == 0) return CordRep::Ref(node);
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> lhs_stack;
-  bool inplace_ok = node->refcount.IsMutable();
-
-  while (node->IsConcat()) {
-    assert(n <= node->length);
-    if (n < node->concat()->right->length) {
-      // Push left to stack, descend right.
-      lhs_stack.push_back(node->concat()->left);
-      node = node->concat()->right;
-    } else {
-      // Drop right, descend left.
-      n -= node->concat()->right->length;
-      node = node->concat()->left;
-    }
-    inplace_ok = inplace_ok && node->refcount.IsMutable();
-  }
-  assert(n <= node->length);
-
-  if (n == 0) {
-    CordRep::Ref(node);
-  } else if (inplace_ok && !node->IsExternal()) {
-    // Consider making a new buffer if the current node capacity is much
-    // larger than the new length.
-    CordRep::Ref(node);
-    node->length -= n;
+template <typename T, Cord::EnableIfString<T>>
+inline void Cord::Prepend(T&& src) {
+  if (src.size() <= kMaxBytesToCopy) {
+    Prepend(absl::string_view(src));
   } else {
-    size_t start = 0;
-    size_t len = node->length - n;
-    if (node->IsSubstring()) {
-      start = node->substring()->start;
-      node = node->substring()->child;
-    }
-    node = NewSubstring(CordRep::Ref(node), start, len);
-  }
-  while (!lhs_stack.empty()) {
-    node = Concat(CordRep::Ref(lhs_stack.back()), node);
-    lhs_stack.pop_back();
+    CordRep* rep = CordRepFromString(std::forward<T>(src));
+    contents_.PrependTree(rep, CordzUpdateTracker::kPrependString);
   }
-  return node;
 }
 
+template void Cord::Prepend(std::string&& src);
+
 void Cord::RemovePrefix(size_t n) {
   ABSL_INTERNAL_CHECK(n <= size(),
                       absl::StrCat("Requested prefix size ", n,
                                    " exceeds Cord's size ", size()));
+  contents_.MaybeRemoveEmptyCrcNode();
   CordRep* tree = contents_.tree();
   if (tree == nullptr) {
     contents_.remove_prefix(n);
   } else {
     auto constexpr method = CordzUpdateTracker::kRemovePrefix;
     CordzUpdateScope scope(contents_.cordz_info(), method);
-    if (tree->IsBtree()) {
+    tree = cord_internal::RemoveCrcNode(tree);
+    if (n >= tree->length) {
+      CordRep::Unref(tree);
+      tree = nullptr;
+    } else if (tree->IsBtree()) {
       CordRep* old = tree;
       tree = tree->btree()->SubTree(n, tree->length - n);
       CordRep::Unref(old);
+    } else if (tree->IsSubstring() && tree->refcount.IsOne()) {
+      tree->substring()->start += n;
+      tree->length -= n;
     } else {
-      CordRep* newrep = RemovePrefixFrom(tree, n);
+      CordRep* rep = CordRepSubstring::Substring(tree, n, tree->length - n);
       CordRep::Unref(tree);
-      tree = VerifyTree(newrep);
+      tree = rep;
     }
     contents_.SetTreeOrEmpty(tree, scope);
   }
@@ -961,74 +706,31 @@ void Cord::RemoveSuffix(size_t n) {
   ABSL_INTERNAL_CHECK(n <= size(),
                       absl::StrCat("Requested suffix size ", n,
                                    " exceeds Cord's size ", size()));
+  contents_.MaybeRemoveEmptyCrcNode();
   CordRep* tree = contents_.tree();
   if (tree == nullptr) {
     contents_.reduce_size(n);
   } else {
     auto constexpr method = CordzUpdateTracker::kRemoveSuffix;
     CordzUpdateScope scope(contents_.cordz_info(), method);
-    if (tree->IsBtree()) {
+    tree = cord_internal::RemoveCrcNode(tree);
+    if (n >= tree->length) {
+      CordRep::Unref(tree);
+      tree = nullptr;
+    } else if (tree->IsBtree()) {
       tree = CordRepBtree::RemoveSuffix(tree->btree(), n);
+    } else if (!tree->IsExternal() && tree->refcount.IsOne()) {
+      assert(tree->IsFlat() || tree->IsSubstring());
+      tree->length -= n;
     } else {
-      CordRep* newrep = RemoveSuffixFrom(tree, n);
+      CordRep* rep = CordRepSubstring::Substring(tree, 0, tree->length - n);
       CordRep::Unref(tree);
-      tree = VerifyTree(newrep);
+      tree = rep;
     }
     contents_.SetTreeOrEmpty(tree, scope);
   }
 }
 
-// Work item for NewSubRange().
-struct SubRange {
-  SubRange(CordRep* a_node, size_t a_pos, size_t a_n)
-      : node(a_node), pos(a_pos), n(a_n) {}
-  CordRep* node;  // nullptr means concat last 2 results.
-  size_t pos;
-  size_t n;
-};
-
-static CordRep* NewSubRange(CordRep* node, size_t pos, size_t n) {
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> results;
-  absl::InlinedVector<SubRange, kInlinedVectorSize> todo;
-  todo.push_back(SubRange(node, pos, n));
-  do {
-    const SubRange& sr = todo.back();
-    node = sr.node;
-    pos = sr.pos;
-    n = sr.n;
-    todo.pop_back();
-
-    if (node == nullptr) {
-      assert(results.size() >= 2);
-      CordRep* right = results.back();
-      results.pop_back();
-      CordRep* left = results.back();
-      results.pop_back();
-      results.push_back(Concat(left, right));
-    } else if (pos == 0 && n == node->length) {
-      results.push_back(CordRep::Ref(node));
-    } else if (!node->IsConcat()) {
-      if (node->IsSubstring()) {
-        pos += node->substring()->start;
-        node = node->substring()->child;
-      }
-      results.push_back(NewSubstring(CordRep::Ref(node), pos, n));
-    } else if (pos + n <= node->concat()->left->length) {
-      todo.push_back(SubRange(node->concat()->left, pos, n));
-    } else if (pos >= node->concat()->left->length) {
-      pos -= node->concat()->left->length;
-      todo.push_back(SubRange(node->concat()->right, pos, n));
-    } else {
-      size_t left_n = node->concat()->left->length - pos;
-      todo.push_back(SubRange(nullptr, 0, 0));  // Concat()
-      todo.push_back(SubRange(node->concat()->right, 0, n - left_n));
-      todo.push_back(SubRange(node->concat()->left, pos, left_n));
-    }
-  } while (!todo.empty());
-  assert(results.size() == 1);
-  return results[0];
-}
-
 Cord Cord::Subcord(size_t pos, size_t new_size) const {
   Cord sub_cord;
   size_t length = size();
@@ -1038,9 +740,7 @@ Cord Cord::Subcord(size_t pos, size_t new_size) const {
 
   CordRep* tree = contents_.tree();
   if (tree == nullptr) {
-    // sub_cord is newly constructed, no need to re-zero-out the tail of
-    // contents_ memory.
-    sub_cord.contents_.set_data(contents_.data() + pos, new_size, false);
+    sub_cord.contents_.set_data(contents_.data() + pos, new_size);
     return sub_cord;
   }
 
@@ -1060,10 +760,11 @@ Cord Cord::Subcord(size_t pos, size_t new_size) const {
     return sub_cord;
   }
 
+  tree = cord_internal::SkipCrcNode(tree);
   if (tree->IsBtree()) {
     tree = tree->btree()->SubTree(pos, new_size);
   } else {
-    tree = NewSubRange(tree, pos, new_size);
+    tree = CordRepSubstring::Substring(tree, pos, new_size);
   }
   sub_cord.contents_.EmplaceTree(tree, contents_.data_,
                                  CordzUpdateTracker::kSubCord);
@@ -1071,146 +772,6 @@ Cord Cord::Subcord(size_t pos, size_t new_size) const {
 }
 
 // --------------------------------------------------------------------
-// Balancing
-
-class CordForest {
- public:
-  explicit CordForest(size_t length)
-      : root_length_(length), trees_(kMinLengthSize, nullptr) {}
-
-  void Build(CordRep* cord_root) {
-    std::vector<CordRep*> pending = {cord_root};
-
-    while (!pending.empty()) {
-      CordRep* node = pending.back();
-      pending.pop_back();
-      CheckNode(node);
-      if (ABSL_PREDICT_FALSE(!node->IsConcat())) {
-        AddNode(node);
-        continue;
-      }
-
-      CordRepConcat* concat_node = node->concat();
-      if (concat_node->depth() >= kMinLengthSize ||
-          concat_node->length < min_length[concat_node->depth()]) {
-        pending.push_back(concat_node->right);
-        pending.push_back(concat_node->left);
-
-        if (concat_node->refcount.IsOne()) {
-          concat_node->left = concat_freelist_;
-          concat_freelist_ = concat_node;
-        } else {
-          CordRep::Ref(concat_node->right);
-          CordRep::Ref(concat_node->left);
-          CordRep::Unref(concat_node);
-        }
-      } else {
-        AddNode(node);
-      }
-    }
-  }
-
-  CordRep* ConcatNodes() {
-    CordRep* sum = nullptr;
-    for (auto* node : trees_) {
-      if (node == nullptr) continue;
-
-      sum = PrependNode(node, sum);
-      root_length_ -= node->length;
-      if (root_length_ == 0) break;
-    }
-    ABSL_INTERNAL_CHECK(sum != nullptr, "Failed to locate sum node");
-    return VerifyTree(sum);
-  }
-
- private:
-  CordRep* AppendNode(CordRep* node, CordRep* sum) {
-    return (sum == nullptr) ? node : MakeConcat(sum, node);
-  }
-
-  CordRep* PrependNode(CordRep* node, CordRep* sum) {
-    return (sum == nullptr) ? node : MakeConcat(node, sum);
-  }
-
-  void AddNode(CordRep* node) {
-    CordRep* sum = nullptr;
-
-    // Collect together everything with which we will merge with node
-    int i = 0;
-    for (; node->length > min_length[i + 1]; ++i) {
-      auto& tree_at_i = trees_[i];
-
-      if (tree_at_i == nullptr) continue;
-      sum = PrependNode(tree_at_i, sum);
-      tree_at_i = nullptr;
-    }
-
-    sum = AppendNode(node, sum);
-
-    // Insert sum into appropriate place in the forest
-    for (; sum->length >= min_length[i]; ++i) {
-      auto& tree_at_i = trees_[i];
-      if (tree_at_i == nullptr) continue;
-
-      sum = MakeConcat(tree_at_i, sum);
-      tree_at_i = nullptr;
-    }
-
-    // min_length[0] == 1, which means sum->length >= min_length[0]
-    assert(i > 0);
-    trees_[i - 1] = sum;
-  }
-
-  // Make concat node trying to resue existing CordRepConcat nodes we
-  // already collected in the concat_freelist_.
-  CordRep* MakeConcat(CordRep* left, CordRep* right) {
-    if (concat_freelist_ == nullptr) return RawConcat(left, right);
-
-    CordRepConcat* rep = concat_freelist_;
-    if (concat_freelist_->left == nullptr) {
-      concat_freelist_ = nullptr;
-    } else {
-      concat_freelist_ = concat_freelist_->left->concat();
-    }
-    SetConcatChildren(rep, left, right);
-
-    return rep;
-  }
-
-  static void CheckNode(CordRep* node) {
-    ABSL_INTERNAL_CHECK(node->length != 0u, "");
-    if (node->IsConcat()) {
-      ABSL_INTERNAL_CHECK(node->concat()->left != nullptr, "");
-      ABSL_INTERNAL_CHECK(node->concat()->right != nullptr, "");
-      ABSL_INTERNAL_CHECK(node->length == (node->concat()->left->length +
-                                           node->concat()->right->length),
-                          "");
-    }
-  }
-
-  size_t root_length_;
-
-  // use an inlined vector instead of a flat array to get bounds checking
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> trees_;
-
-  // List of concat nodes we can re-use for Cord balancing.
-  CordRepConcat* concat_freelist_ = nullptr;
-};
-
-static CordRep* Rebalance(CordRep* node) {
-  VerifyTree(node);
-  assert(node->IsConcat());
-
-  if (node->length == 0) {
-    return nullptr;
-  }
-
-  CordForest forest(node->length);
-  forest.Build(node);
-  return forest.ConcatNodes();
-}
-
-// --------------------------------------------------------------------
 // Comparators
 
 namespace {
@@ -1256,7 +817,7 @@ inline absl::string_view Cord::InlineRep::FindFlatStartPiece() const {
     return absl::string_view(data_.as_chars(), data_.inline_size());
   }
 
-  CordRep* node = tree();
+  CordRep* node = cord_internal::SkipCrcNode(tree());
   if (node->IsFlat()) {
     return absl::string_view(node->flat()->Data(), node->length);
   }
@@ -1274,11 +835,6 @@ inline absl::string_view Cord::InlineRep::FindFlatStartPiece() const {
     return tree->Data(tree->begin());
   }
 
-  // Walk down the left branches until we hit a non-CONCAT node.
-  while (node->IsConcat()) {
-    node = node->concat()->left;
-  }
-
   // Get the child node if we encounter a SUBSTRING.
   size_t offset = 0;
   size_t length = node->length;
@@ -1298,6 +854,30 @@ inline absl::string_view Cord::InlineRep::FindFlatStartPiece() const {
   return absl::string_view(node->external()->base + offset, length);
 }
 
+void Cord::SetExpectedChecksum(uint32_t crc) {
+  auto constexpr method = CordzUpdateTracker::kSetExpectedChecksum;
+  if (empty()) {
+    contents_.MaybeRemoveEmptyCrcNode();
+    CordRep* rep = CordRepCrc::New(nullptr, crc);
+    contents_.EmplaceTree(rep, method);
+  } else if (!contents_.is_tree()) {
+    CordRep* rep = contents_.MakeFlatWithExtraCapacity(0);
+    rep = CordRepCrc::New(rep, crc);
+    contents_.EmplaceTree(rep, method);
+  } else {
+    const CordzUpdateScope scope(contents_.data_.cordz_info(), method);
+    CordRep* rep = CordRepCrc::New(contents_.data_.as_tree(), crc);
+    contents_.SetTree(rep, scope);
+  }
+}
+
+absl::optional<uint32_t> Cord::ExpectedChecksum() const {
+  if (!contents_.is_tree() || !contents_.tree()->IsCrc()) {
+    return absl::nullopt;
+  }
+  return contents_.tree()->crc()->crc;
+}
+
 inline int Cord::CompareSlowPath(absl::string_view rhs, size_t compared_size,
                                  size_t size_to_compare) const {
   auto advance = [](Cord::ChunkIterator* it, absl::string_view* chunk) {
@@ -1363,6 +943,7 @@ inline int Cord::CompareSlowPath(const Cord& rhs, size_t compared_size,
 }
 
 inline absl::string_view Cord::GetFirstChunk(const Cord& c) {
+  if (c.empty()) return {};
   return c.contents_.FindFlatStartPiece();
 }
 inline absl::string_view Cord::GetFirstChunk(absl::string_view sv) {
@@ -1473,42 +1054,6 @@ void Cord::CopyToArraySlowPath(char* dst) const {
   }
 }
 
-Cord::ChunkIterator& Cord::ChunkIterator::AdvanceStack() {
-  auto& stack_of_right_children = stack_of_right_children_;
-  if (stack_of_right_children.empty()) {
-    assert(!current_chunk_.empty());  // Called on invalid iterator.
-    // We have reached the end of the Cord.
-    return *this;
-  }
-
-  // Process the next node on the stack.
-  CordRep* node = stack_of_right_children.back();
-  stack_of_right_children.pop_back();
-
-  // Walk down the left branches until we hit a non-CONCAT node. Save the
-  // right children to the stack for subsequent traversal.
-  while (node->IsConcat()) {
-    stack_of_right_children.push_back(node->concat()->right);
-    node = node->concat()->left;
-  }
-
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  if (node->IsSubstring()) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  assert(node->IsExternal() || node->IsFlat());
-  assert(length != 0);
-  const char* data =
-      node->IsExternal() ? node->external()->base : node->flat()->Data();
-  current_chunk_ = absl::string_view(data + offset, length);
-  current_leaf_ = node;
-  return *this;
-}
-
 Cord Cord::ChunkIterator::AdvanceAndReadBytes(size_t n) {
   ABSL_HARDENING_ASSERT(bytes_remaining_ >= n &&
                         "Attempted to iterate past `end()`");
@@ -1551,166 +1096,33 @@ Cord Cord::ChunkIterator::AdvanceAndReadBytes(size_t n) {
     return subcord;
   }
 
-  auto& stack_of_right_children = stack_of_right_children_;
-  if (n < current_chunk_.size()) {
-    // Range to read is a proper subrange of the current chunk.
-    assert(current_leaf_ != nullptr);
-    CordRep* subnode = CordRep::Ref(current_leaf_);
-    const char* data = subnode->IsExternal() ? subnode->external()->base
-                                             : subnode->flat()->Data();
-    subnode = NewSubstring(subnode, current_chunk_.data() - data, n);
-    subcord.contents_.EmplaceTree(VerifyTree(subnode), method);
-    RemoveChunkPrefix(n);
-    return subcord;
-  }
-
-  // Range to read begins with a proper subrange of the current chunk.
-  assert(!current_chunk_.empty());
+  // Short circuit if reading the entire data edge.
   assert(current_leaf_ != nullptr);
-  CordRep* subnode = CordRep::Ref(current_leaf_);
-  if (current_chunk_.size() < subnode->length) {
-    const char* data = subnode->IsExternal() ? subnode->external()->base
-                                             : subnode->flat()->Data();
-    subnode = NewSubstring(subnode, current_chunk_.data() - data,
-                           current_chunk_.size());
-  }
-  n -= current_chunk_.size();
-  bytes_remaining_ -= current_chunk_.size();
-
-  // Process the next node(s) on the stack, reading whole subtrees depending on
-  // their length and how many bytes we are advancing.
-  CordRep* node = nullptr;
-  while (!stack_of_right_children.empty()) {
-    node = stack_of_right_children.back();
-    stack_of_right_children.pop_back();
-    if (node->length > n) break;
-    // TODO(qrczak): This might unnecessarily recreate existing concat nodes.
-    // Avoiding that would need pretty complicated logic (instead of
-    // current_leaf, keep current_subtree_ which points to the highest node
-    // such that the current leaf can be found on the path of left children
-    // starting from current_subtree_; delay creating subnode while node is
-    // below current_subtree_; find the proper node along the path of left
-    // children starting from current_subtree_ if this loop exits while staying
-    // below current_subtree_; etc.; alternatively, push parents instead of
-    // right children on the stack).
-    subnode = Concat(subnode, CordRep::Ref(node));
-    n -= node->length;
-    bytes_remaining_ -= node->length;
-    node = nullptr;
-  }
-
-  if (node == nullptr) {
-    // We have reached the end of the Cord.
-    assert(bytes_remaining_ == 0);
-    subcord.contents_.EmplaceTree(VerifyTree(subnode), method);
+  if (n == current_leaf_->length) {
+    bytes_remaining_ = 0;
+    current_chunk_ = {};
+    CordRep* tree = CordRep::Ref(current_leaf_);
+    subcord.contents_.EmplaceTree(VerifyTree(tree), method);
     return subcord;
   }
 
-  // Walk down the appropriate branches until we hit a non-CONCAT node. Save the
-  // right children to the stack for subsequent traversal.
-  while (node->IsConcat()) {
-    if (node->concat()->left->length > n) {
-      // Push right, descend left.
-      stack_of_right_children.push_back(node->concat()->right);
-      node = node->concat()->left;
-    } else {
-      // Read left, descend right.
-      subnode = Concat(subnode, CordRep::Ref(node->concat()->left));
-      n -= node->concat()->left->length;
-      bytes_remaining_ -= node->concat()->left->length;
-      node = node->concat()->right;
-    }
-  }
+  // From this point on, we need a partial substring node.
+  // Get pointer to the underlying flat or external data payload and
+  // compute data pointer and offset into current flat or external.
+  CordRep* payload = current_leaf_->IsSubstring()
+                         ? current_leaf_->substring()->child
+                         : current_leaf_;
+  const char* data = payload->IsExternal() ? payload->external()->base
+                                           : payload->flat()->Data();
+  const size_t offset = static_cast<size_t>(current_chunk_.data() - data);
 
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  if (node->IsSubstring()) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  // Range to read ends with a proper (possibly empty) subrange of the current
-  // chunk.
-  assert(node->IsExternal() || node->IsFlat());
-  assert(length > n);
-  if (n > 0) {
-    subnode = Concat(subnode, NewSubstring(CordRep::Ref(node), offset, n));
-  }
-  const char* data =
-      node->IsExternal() ? node->external()->base : node->flat()->Data();
-  current_chunk_ = absl::string_view(data + offset + n, length - n);
-  current_leaf_ = node;
+  auto* tree = CordRepSubstring::Substring(payload, offset, n);
+  subcord.contents_.EmplaceTree(VerifyTree(tree), method);
   bytes_remaining_ -= n;
-  subcord.contents_.EmplaceTree(VerifyTree(subnode), method);
+  current_chunk_.remove_prefix(n);
   return subcord;
 }
 
-void Cord::ChunkIterator::AdvanceBytesSlowPath(size_t n) {
-  assert(bytes_remaining_ >= n && "Attempted to iterate past `end()`");
-  assert(n >= current_chunk_.size());  // This should only be called when
-                                       // iterating to a new node.
-
-  n -= current_chunk_.size();
-  bytes_remaining_ -= current_chunk_.size();
-
-  if (stack_of_right_children_.empty()) {
-    // We have reached the end of the Cord.
-    assert(bytes_remaining_ == 0);
-    return;
-  }
-
-  // Process the next node(s) on the stack, skipping whole subtrees depending on
-  // their length and how many bytes we are advancing.
-  CordRep* node = nullptr;
-  auto& stack_of_right_children = stack_of_right_children_;
-  while (!stack_of_right_children.empty()) {
-    node = stack_of_right_children.back();
-    stack_of_right_children.pop_back();
-    if (node->length > n) break;
-    n -= node->length;
-    bytes_remaining_ -= node->length;
-    node = nullptr;
-  }
-
-  if (node == nullptr) {
-    // We have reached the end of the Cord.
-    assert(bytes_remaining_ == 0);
-    return;
-  }
-
-  // Walk down the appropriate branches until we hit a non-CONCAT node. Save the
-  // right children to the stack for subsequent traversal.
-  while (node->IsConcat()) {
-    if (node->concat()->left->length > n) {
-      // Push right, descend left.
-      stack_of_right_children.push_back(node->concat()->right);
-      node = node->concat()->left;
-    } else {
-      // Skip left, descend right.
-      n -= node->concat()->left->length;
-      bytes_remaining_ -= node->concat()->left->length;
-      node = node->concat()->right;
-    }
-  }
-
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  if (node->IsSubstring()) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  assert(node->IsExternal() || node->IsFlat());
-  assert(length > n);
-  const char* data =
-      node->IsExternal() ? node->external()->base : node->flat()->Data();
-  current_chunk_ = absl::string_view(data + offset + n, length - n);
-  current_leaf_ = node;
-  bytes_remaining_ -= n;
-}
-
 char Cord::operator[](size_t i) const {
   ABSL_HARDENING_ASSERT(i < size());
   size_t offset = i;
@@ -1718,6 +1130,7 @@ char Cord::operator[](size_t i) const {
   if (rep == nullptr) {
     return contents_.data()[i];
   }
+  rep = cord_internal::SkipCrcNode(rep);
   while (true) {
     assert(rep != nullptr);
     assert(offset < rep->length);
@@ -1729,16 +1142,6 @@ char Cord::operator[](size_t i) const {
     } else if (rep->IsExternal()) {
       // Get the "i"th character from the external array.
       return rep->external()->base[offset];
-    } else if (rep->IsConcat()) {
-      // Recursively branch to the side of the concatenation that the "i"th
-      // character is on.
-      size_t left_length = rep->concat()->left->length;
-      if (offset < left_length) {
-        rep = rep->concat()->left;
-      } else {
-        offset -= left_length;
-        rep = rep->concat()->right;
-      }
     } else {
       // This must be a substring a node, so bypass it to get to the child.
       assert(rep->IsSubstring());
@@ -1778,6 +1181,11 @@ absl::string_view Cord::FlattenSlowPath() {
 
 /* static */ bool Cord::GetFlatAux(CordRep* rep, absl::string_view* fragment) {
   assert(rep != nullptr);
+  if (rep->length == 0) {
+    *fragment = absl::string_view();
+    return true;
+  }
+  rep = cord_internal::SkipCrcNode(rep);
   if (rep->IsFlat()) {
     *fragment = absl::string_view(rep->flat()->Data(), rep->length);
     return true;
@@ -1807,6 +1215,10 @@ absl::string_view Cord::FlattenSlowPath() {
 /* static */ void Cord::ForEachChunkAux(
     absl::cord_internal::CordRep* rep,
     absl::FunctionRef<void(absl::string_view)> callback) {
+  assert(rep != nullptr);
+  if (rep->length == 0) return;
+  rep = cord_internal::SkipCrcNode(rep);
+
   if (rep->IsBtree()) {
     ChunkIterator it(rep), end;
     while (it != end) {
@@ -1816,44 +1228,13 @@ absl::string_view Cord::FlattenSlowPath() {
     return;
   }
 
-  assert(rep != nullptr);
-  int stack_pos = 0;
-  constexpr int stack_max = 128;
-  // Stack of right branches for tree traversal
-  absl::cord_internal::CordRep* stack[stack_max];
-  absl::cord_internal::CordRep* current_node = rep;
-  while (true) {
-    if (current_node->IsConcat()) {
-      if (stack_pos == stack_max) {
-        // There's no more room on our stack array to add another right branch,
-        // and the idea is to avoid allocations, so call this function
-        // recursively to navigate this subtree further.  (This is not something
-        // we expect to happen in practice).
-        ForEachChunkAux(current_node, callback);
-
-        // Pop the next right branch and iterate.
-        current_node = stack[--stack_pos];
-        continue;
-      } else {
-        // Save the right branch for later traversal and continue down the left
-        // branch.
-        stack[stack_pos++] = current_node->concat()->right;
-        current_node = current_node->concat()->left;
-        continue;
-      }
-    }
-    // This is a leaf node, so invoke our callback.
-    absl::string_view chunk;
-    bool success = GetFlatAux(current_node, &chunk);
-    assert(success);
-    if (success) {
-      callback(chunk);
-    }
-    if (stack_pos == 0) {
-      // end of traversal
-      return;
-    }
-    current_node = stack[--stack_pos];
+  // This is a leaf node, so invoke our callback.
+  absl::cord_internal::CordRep* current_node = cord_internal::SkipCrcNode(rep);
+  absl::string_view chunk;
+  bool success = GetFlatAux(current_node, &chunk);
+  assert(success);
+  if (success) {
+    callback(chunk);
   }
 }
 
@@ -1868,19 +1249,21 @@ static void DumpNode(CordRep* rep, bool include_data, std::ostream* os,
     *os << " [";
     if (include_data) *os << static_cast<void*>(rep);
     *os << "]";
-    *os << " " << (IsRootBalanced(rep) ? 'b' : 'u');
     *os << " " << std::setw(indent) << "";
-    if (rep->IsConcat()) {
-      *os << "CONCAT depth=" << Depth(rep) << "\n";
+    bool leaf = false;
+    if (rep == nullptr) {
+      *os << "NULL\n";
+      leaf = true;
+    } else if (rep->IsCrc()) {
+      *os << "CRC crc=" << rep->crc()->crc << "\n";
       indent += kIndentStep;
-      indents.push_back(indent);
-      stack.push_back(rep->concat()->right);
-      rep = rep->concat()->left;
+      rep = rep->crc()->child;
     } else if (rep->IsSubstring()) {
       *os << "SUBSTRING @ " << rep->substring()->start << "\n";
       indent += kIndentStep;
       rep = rep->substring()->child;
     } else {  // Leaf or ring
+      leaf = true;
       if (rep->IsExternal()) {
         *os << "EXTERNAL [";
         if (include_data)
@@ -1894,6 +1277,8 @@ static void DumpNode(CordRep* rep, bool include_data, std::ostream* os,
       } else {
         CordRepBtree::Dump(rep, /*label=*/ "", include_data, *os);
       }
+    }
+    if (leaf) {
       if (stack.empty()) break;
       rep = stack.back();
       stack.pop_back();
@@ -1912,7 +1297,7 @@ static std::string ReportError(CordRep* root, CordRep* node) {
 }
 
 static bool VerifyNode(CordRep* root, CordRep* start_node,
-                       bool full_validation) {
+                       bool /* full_validation */) {
   absl::InlinedVector<CordRep*, 2> worklist;
   worklist.push_back(start_node);
   do {
@@ -1922,21 +1307,10 @@ static bool VerifyNode(CordRep* root, CordRep* start_node,
     ABSL_INTERNAL_CHECK(node != nullptr, ReportError(root, node));
     if (node != root) {
       ABSL_INTERNAL_CHECK(node->length != 0, ReportError(root, node));
+      ABSL_INTERNAL_CHECK(!node->IsCrc(), ReportError(root, node));
     }
 
-    if (node->IsConcat()) {
-      ABSL_INTERNAL_CHECK(node->concat()->left != nullptr,
-                          ReportError(root, node));
-      ABSL_INTERNAL_CHECK(node->concat()->right != nullptr,
-                          ReportError(root, node));
-      ABSL_INTERNAL_CHECK((node->length == node->concat()->left->length +
-                                               node->concat()->right->length),
-                          ReportError(root, node));
-      if (full_validation) {
-        worklist.push_back(node->concat()->right);
-        worklist.push_back(node->concat()->left);
-      }
-    } else if (node->IsFlat()) {
+    if (node->IsFlat()) {
       ABSL_INTERNAL_CHECK(node->length <= node->flat()->Capacity(),
                           ReportError(root, node));
     } else if (node->IsExternal()) {
@@ -1949,78 +1323,23 @@ static bool VerifyNode(CordRep* root, CordRep* start_node,
       ABSL_INTERNAL_CHECK(node->substring()->start + node->length <=
                               node->substring()->child->length,
                           ReportError(root, node));
+    } else if (node->IsCrc()) {
+      ABSL_INTERNAL_CHECK(
+          node->crc()->child != nullptr || node->crc()->length == 0,
+          ReportError(root, node));
+      if (node->crc()->child != nullptr) {
+        ABSL_INTERNAL_CHECK(node->crc()->length == node->crc()->child->length,
+                            ReportError(root, node));
+        worklist.push_back(node->crc()->child);
+      }
     }
   } while (!worklist.empty());
   return true;
 }
 
-// Traverses the tree and computes the total memory allocated.
-/* static */ size_t Cord::MemoryUsageAux(const CordRep* rep) {
-  size_t total_mem_usage = 0;
-
-  // Allow a quick exit for the common case that the root is a leaf.
-  if (RepMemoryUsageLeaf(rep, &total_mem_usage)) {
-    return total_mem_usage;
-  }
-
-  // Iterate over the tree. cur_node is never a leaf node and leaf nodes will
-  // never be appended to tree_stack. This reduces overhead from manipulating
-  // tree_stack.
-  absl::InlinedVector<const CordRep*, kInlinedVectorSize> tree_stack;
-  const CordRep* cur_node = rep;
-  while (true) {
-    const CordRep* next_node = nullptr;
-
-    if (cur_node->IsConcat()) {
-      total_mem_usage += sizeof(CordRepConcat);
-      const CordRep* left = cur_node->concat()->left;
-      if (!RepMemoryUsageLeaf(left, &total_mem_usage)) {
-        next_node = left;
-      }
-
-      const CordRep* right = cur_node->concat()->right;
-      if (!RepMemoryUsageLeaf(right, &total_mem_usage)) {
-        if (next_node) {
-          tree_stack.push_back(next_node);
-        }
-        next_node = right;
-      }
-    } else if (cur_node->IsBtree()) {
-      total_mem_usage += sizeof(CordRepBtree);
-      const CordRepBtree* node = cur_node->btree();
-      if (node->height() == 0) {
-        for (const CordRep* edge : node->Edges()) {
-          RepMemoryUsageDataEdge(edge, &total_mem_usage);
-        }
-      } else {
-        for (const CordRep* edge : node->Edges()) {
-          tree_stack.push_back(edge);
-        }
-      }
-    } else {
-      // Since cur_node is not a leaf or a concat node it must be a substring.
-      assert(cur_node->IsSubstring());
-      total_mem_usage += sizeof(CordRepSubstring);
-      next_node = cur_node->substring()->child;
-      if (RepMemoryUsageLeaf(next_node, &total_mem_usage)) {
-        next_node = nullptr;
-      }
-    }
-
-    if (!next_node) {
-      if (tree_stack.empty()) {
-        return total_mem_usage;
-      }
-      next_node = tree_stack.back();
-      tree_stack.pop_back();
-    }
-    cur_node = next_node;
-  }
-}
-
 std::ostream& operator<<(std::ostream& out, const Cord& cord) {
   for (absl::string_view chunk : cord.Chunks()) {
-    out.write(chunk.data(), chunk.size());
+    out.write(chunk.data(), static_cast<std::streamsize>(chunk.size()));
   }
   return out;
 }
@@ -2035,7 +1354,6 @@ uint8_t CordTestAccess::LengthToTag(size_t s) {
   ABSL_INTERNAL_CHECK(s <= kMaxFlatLength, absl::StrCat("Invalid length ", s));
   return cord_internal::AllocatedSizeToTag(s + cord_internal::kFlatOverhead);
 }
-size_t CordTestAccess::SizeofCordRepConcat() { return sizeof(CordRepConcat); }
 size_t CordTestAccess::SizeofCordRepExternal() {
   return sizeof(CordRepExternal);
 }
diff --git a/third_party/abseil-cpp/absl/strings/cord.h b/third_party/abseil-cpp/absl/strings/cord.h
index f0a1991471..6e3da89e62 100644
--- a/third_party/abseil-cpp/absl/strings/cord.h
+++ b/third_party/abseil-cpp/absl/strings/cord.h
@@ -20,8 +20,7 @@
 // structure. A Cord is a string-like sequence of characters optimized for
 // specific use cases. Unlike a `std::string`, which stores an array of
 // contiguous characters, Cord data is stored in a structure consisting of
-// separate, reference-counted "chunks." (Currently, this implementation is a
-// tree structure, though that implementation may change.)
+// separate, reference-counted "chunks."
 //
 // Because a Cord consists of these chunks, data can be added to or removed from
 // a Cord during its lifetime. Chunks may also be shared between Cords. Unlike a
@@ -70,6 +69,7 @@
 #include <string>
 #include <type_traits>
 
+#include "absl/base/attributes.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/endian.h"
 #include "absl/base/internal/per_thread_tls.h"
@@ -78,9 +78,13 @@
 #include "absl/container/inlined_vector.h"
 #include "absl/functional/function_ref.h"
 #include "absl/meta/type_traits.h"
+#include "absl/strings/cord_analysis.h"
+#include "absl/strings/cord_buffer.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
 #include "absl/strings/internal/cord_rep_btree_reader.h"
+#include "absl/strings/internal/cord_rep_crc.h"
 #include "absl/strings/internal/cord_rep_ring.h"
 #include "absl/strings/internal/cordz_functions.h"
 #include "absl/strings/internal/cordz_info.h"
@@ -100,6 +104,20 @@ template <typename Releaser>
 Cord MakeCordFromExternal(absl::string_view, Releaser&&);
 void CopyCordToString(const Cord& src, std::string* dst);
 
+// Cord memory accounting modes
+enum class CordMemoryAccounting {
+  // Counts the *approximate* number of bytes held in full or in part by this
+  // Cord (which may not remain the same between invocations). Cords that share
+  // memory could each be "charged" independently for the same shared memory.
+  kTotal,
+
+  // Counts the *approximate* number of bytes held in full or in part by this
+  // Cord weighted by the sharing ratio of that data. For example, if some data
+  // edge is shared by 4 different Cords, then each cord is attributed 1/4th of
+  // the total memory usage as a 'fair share' of the total memory usage.
+  kFairShare,
+};
+
 // Cord
 //
 // A Cord is a sequence of characters, designed to be more efficient than a
@@ -214,7 +232,7 @@ class Cord {
   //
   // Releases the Cord data. Any nodes that share data with other Cords, if
   // applicable, will have their reference counts reduced by 1.
-  void Clear();
+  ABSL_ATTRIBUTE_REINITIALIZES void Clear();
 
   // Cord::Append()
   //
@@ -226,6 +244,58 @@ class Cord {
   template <typename T, EnableIfString<T> = 0>
   void Append(T&& src);
 
+  // Appends `buffer` to this cord, unless `buffer` has a zero length in which
+  // case this method has no effect on this cord instance.
+  // This method is guaranteed to consume `buffer`.
+  void Append(CordBuffer buffer);
+
+  // Returns a CordBuffer, re-using potential existing capacity in this cord.
+  //
+  // Cord instances may have additional unused capacity in the last (or first)
+  // nodes of the underlying tree to facilitate amortized growth. This method
+  // allows applications to explicitly use this spare capacity if available,
+  // or create a new CordBuffer instance otherwise.
+  // If this cord has a final non-shared node with at least `min_capacity`
+  // available, then this method will return that buffer including its data
+  // contents. I.e.; the returned buffer will have a non-zero length, and
+  // a capacity of at least `buffer.length + min_capacity`. Otherwise, this
+  // method will return `CordBuffer::CreateWithDefaultLimit(capacity)`.
+  //
+  // Below an example of using GetAppendBuffer. Notice that in this example we
+  // use `GetAppendBuffer()` only on the first iteration. As we know nothing
+  // about any initial extra capacity in `cord`, we may be able to use the extra
+  // capacity. But as we add new buffers with fully utilized contents after that
+  // we avoid calling `GetAppendBuffer()` on subsequent iterations: while this
+  // works fine, it results in an unnecessary inspection of cord contents:
+  //
+  //   void AppendRandomDataToCord(absl::Cord &cord, size_t n) {
+  //     bool first = true;
+  //     while (n > 0) {
+  //       CordBuffer buffer = first ? cord.GetAppendBuffer(n)
+  //                                 : CordBuffer::CreateWithDefaultLimit(n);
+  //       absl::Span<char> data = buffer.available_up_to(n);
+  //       FillRandomValues(data.data(), data.size());
+  //       buffer.IncreaseLengthBy(data.size());
+  //       cord.Append(std::move(buffer));
+  //       n -= data.size();
+  //       first = false;
+  //     }
+  //   }
+  CordBuffer GetAppendBuffer(size_t capacity, size_t min_capacity = 16);
+
+  // Returns a CordBuffer, re-using potential existing capacity in this cord.
+  //
+  // This function is identical to `GetAppendBuffer`, except that in the case
+  // where a new `CordBuffer` is allocated, it is allocated using the provided
+  // custom limit instead of the default limit. `GetAppendBuffer` will default
+  // to `CordBuffer::CreateWithDefaultLimit(capacity)` whereas this method
+  // will default to `CordBuffer::CreateWithCustomLimit(block_size, capacity)`.
+  // This method is equivalent to `GetAppendBuffer` if `block_size` is zero.
+  // See the documentation for `CreateWithCustomLimit` for more details on the
+  // restrictions and legal values for `block_size`.
+  CordBuffer GetCustomAppendBuffer(size_t block_size, size_t capacity,
+                                   size_t min_capacity = 16);
+
   // Cord::Prepend()
   //
   // Prepends data to the Cord, which may come from another Cord or other string
@@ -235,6 +305,11 @@ class Cord {
   template <typename T, EnableIfString<T> = 0>
   void Prepend(T&& src);
 
+  // Prepends `buffer` to this cord, unless `buffer` has a zero length in which
+  // case this method has no effect on this cord instance.
+  // This method is guaranteed to consume `buffer`.
+  void Prepend(CordBuffer buffer);
+
   // Cord::RemovePrefix()
   //
   // Removes the first `n` bytes of a Cord.
@@ -270,11 +345,10 @@ class Cord {
 
   // Cord::EstimatedMemoryUsage()
   //
-  // Returns the *approximate* number of bytes held in full or in part by this
-  // Cord (which may not remain the same between invocations).  Note that Cords
-  // that share memory could each be "charged" independently for the same shared
-  // memory.
-  size_t EstimatedMemoryUsage() const;
+  // Returns the *approximate* number of bytes held by this cord.
+  // See CordMemoryAccounting for more information on the accounting method.
+  size_t EstimatedMemoryUsage(CordMemoryAccounting accounting_method =
+                                  CordMemoryAccounting::kTotal) const;
 
   // Cord::Compare()
   //
@@ -324,7 +398,7 @@ class Cord {
   //----------------------------------------------------------------------------
   //
   // A `Cord::ChunkIterator` allows iteration over the constituent chunks of its
-  // Cord. Such iteration allows you to perform non-const operatons on the data
+  // Cord. Such iteration allows you to perform non-const operations on the data
   // of a Cord without modifying it.
   //
   // Generally, you do not instantiate a `Cord::ChunkIterator` directly;
@@ -372,12 +446,6 @@ class Cord {
     using CordRepBtree = absl::cord_internal::CordRepBtree;
     using CordRepBtreeReader = absl::cord_internal::CordRepBtreeReader;
 
-    // Stack of right children of concat nodes that we have to visit.
-    // Keep this at the end of the structure to avoid cache-thrashing.
-    // TODO(jgm): Benchmark to see if there's a more optimal value than 47 for
-    // the inlined vector size (47 exists for backward compatibility).
-    using Stack = absl::InlinedVector<absl::cord_internal::CordRep*, 47>;
-
     // Constructs a `begin()` iterator from `tree`. `tree` must not be null.
     explicit ChunkIterator(cord_internal::CordRep* tree);
 
@@ -393,17 +461,10 @@ class Cord {
     Cord AdvanceAndReadBytes(size_t n);
     void AdvanceBytes(size_t n);
 
-    // Stack specific operator++
-    ChunkIterator& AdvanceStack();
-
     // Btree specific operator++
     ChunkIterator& AdvanceBtree();
     void AdvanceBytesBtree(size_t n);
 
-    // Iterates `n` bytes, where `n` is expected to be greater than or equal to
-    // `current_chunk_.size()`.
-    void AdvanceBytesSlowPath(size_t n);
-
     // A view into bytes of the current `CordRep`. It may only be a view to a
     // suffix of bytes if this is being used by `CharIterator`.
     absl::string_view current_chunk_;
@@ -416,12 +477,9 @@ class Cord {
 
     // Cord reader for cord btrees. Empty if not traversing a btree.
     CordRepBtreeReader btree_reader_;
-
-    // See 'Stack' alias definition.
-    Stack stack_of_right_children_;
   };
 
-  // Cord::ChunkIterator::chunk_begin()
+  // Cord::chunk_begin()
   //
   // Returns an iterator to the first chunk of the `Cord`.
   //
@@ -437,7 +495,7 @@ class Cord {
   //   }
   ChunkIterator chunk_begin() const;
 
-  // Cord::ChunkItertator::chunk_end()
+  // Cord::chunk_end()
   //
   // Returns an iterator one increment past the last chunk of the `Cord`.
   //
@@ -447,7 +505,7 @@ class Cord {
   ChunkIterator chunk_end() const;
 
   //----------------------------------------------------------------------------
-  // Cord::ChunkIterator::ChunkRange
+  // Cord::ChunkRange
   //----------------------------------------------------------------------------
   //
   // `ChunkRange` is a helper class for iterating over the chunks of the `Cord`,
@@ -461,7 +519,7 @@ class Cord {
   class ChunkRange {
    public:
     // Fulfill minimum c++ container requirements [container.requirements]
-    // Theses (partial) container type definitions allow ChunkRange to be used
+    // These (partial) container type definitions allow ChunkRange to be used
     // in various utilities expecting a subset of [container.requirements].
     // For example, the below enables using `::testing::ElementsAre(...)`
     using value_type = absl::string_view;
@@ -481,9 +539,9 @@ class Cord {
 
   // Cord::Chunks()
   //
-  // Returns a `Cord::ChunkIterator::ChunkRange` for iterating over the chunks
-  // of a `Cord` with a range-based for-loop. For most iteration tasks on a
-  // Cord, use `Cord::Chunks()` to retrieve this iterator.
+  // Returns a `Cord::ChunkRange` for iterating over the chunks of a `Cord` with
+  // a range-based for-loop. For most iteration tasks on a Cord, use
+  // `Cord::Chunks()` to retrieve this iterator.
   //
   // Example:
   //
@@ -549,7 +607,7 @@ class Cord {
     ChunkIterator chunk_iterator_;
   };
 
-  // Cord::CharIterator::AdvanceAndRead()
+  // Cord::AdvanceAndRead()
   //
   // Advances the `Cord::CharIterator` by `n_bytes` and returns the bytes
   // advanced as a separate `Cord`. `n_bytes` must be less than or equal to the
@@ -557,21 +615,21 @@ class Cord {
   // valid to pass `char_end()` and `0`.
   static Cord AdvanceAndRead(CharIterator* it, size_t n_bytes);
 
-  // Cord::CharIterator::Advance()
+  // Cord::Advance()
   //
   // Advances the `Cord::CharIterator` by `n_bytes`. `n_bytes` must be less than
   // or equal to the number of bytes remaining within the Cord; otherwise,
   // behavior is undefined. It is valid to pass `char_end()` and `0`.
   static void Advance(CharIterator* it, size_t n_bytes);
 
-  // Cord::CharIterator::ChunkRemaining()
+  // Cord::ChunkRemaining()
   //
   // Returns the longest contiguous view starting at the iterator's position.
   //
   // `it` must be dereferenceable.
   static absl::string_view ChunkRemaining(const CharIterator& it);
 
-  // Cord::CharIterator::char_begin()
+  // Cord::char_begin()
   //
   // Returns an iterator to the first character of the `Cord`.
   //
@@ -580,7 +638,7 @@ class Cord {
   // a `CharIterator` where range-based for-loops may not be available.
   CharIterator char_begin() const;
 
-  // Cord::CharIterator::char_end()
+  // Cord::char_end()
   //
   // Returns an iterator to one past the last character of the `Cord`.
   //
@@ -589,13 +647,13 @@ class Cord {
   // a `CharIterator` where range-based for-loops are not useful.
   CharIterator char_end() const;
 
-  // Cord::CharIterator::CharRange
+  // Cord::CharRange
   //
   // `CharRange` is a helper class for iterating over the characters of a
   // producing an iterator which can be used within a range-based for loop.
   // Construction of a `CharRange` will return an iterator pointing to the first
   // character of the Cord. Generally, do not construct a `CharRange` directly;
-  // instead, prefer to use the `Cord::Chars()` method show below.
+  // instead, prefer to use the `Cord::Chars()` method shown below.
   //
   // Implementation note: `CharRange` is simply a convenience wrapper over
   // `Cord::char_begin()` and `Cord::char_end()`.
@@ -620,11 +678,11 @@ class Cord {
     const Cord* cord_;
   };
 
-  // Cord::CharIterator::Chars()
+  // Cord::Chars()
   //
-  // Returns a `Cord::CharIterator` for iterating over the characters of a
-  // `Cord` with a range-based for-loop. For most character-based iteration
-  // tasks on a Cord, use `Cord::Chars()` to retrieve this iterator.
+  // Returns a `Cord::CharRange` for iterating over the characters of a `Cord`
+  // with a range-based for-loop. For most character-based iteration tasks on a
+  // Cord, use `Cord::Chars()` to retrieve this iterator.
   //
   // Example:
   //
@@ -671,6 +729,29 @@ class Cord {
     cord->Append(part);
   }
 
+  // Cord::SetExpectedChecksum()
+  //
+  // Stores a checksum value with this non-empty cord instance, for later
+  // retrieval.
+  //
+  // The expected checksum is a number stored out-of-band, alongside the data.
+  // It is preserved across copies and assignments, but any mutations to a cord
+  // will cause it to lose its expected checksum.
+  //
+  // The expected checksum is not part of a Cord's value, and does not affect
+  // operations such as equality or hashing.
+  //
+  // This field is intended to store a CRC32C checksum for later validation, to
+  // help support end-to-end checksum workflows.  However, the Cord API itself
+  // does no CRC validation, and assigns no meaning to this number.
+  //
+  // This call has no effect if this cord is empty.
+  void SetExpectedChecksum(uint32_t crc);
+
+  // Returns this cord's expected checksum, if it has one.  Otherwise, returns
+  // nullopt.
+  absl::optional<uint32_t> ExpectedChecksum() const;
+
   template <typename H>
   friend H AbslHashValue(H hash_state, const absl::Cord& c) {
     absl::optional<absl::string_view> maybe_flat = c.TryFlat();
@@ -686,7 +767,8 @@ class Cord {
   // be used by spelling absl::strings_internal::MakeStringConstant, which is
   // also an internal API.
   template <typename T>
-  explicit constexpr Cord(strings_internal::StringConstant<T>);
+  // NOLINTNEXTLINE(google-explicit-constructor)
+  constexpr Cord(strings_internal::StringConstant<T>);
 
  private:
   using CordRep = absl::cord_internal::CordRep;
@@ -738,12 +820,12 @@ class Cord {
     bool empty() const;
     size_t size() const;
     const char* data() const;  // Returns nullptr if holding pointer
-    void set_data(const char* data, size_t n,
-                  bool nullify_tail);  // Discards pointer, if any
-    char* set_data(size_t n);          // Write data to the result
+    void set_data(const char* data, size_t n);  // Discards pointer, if any
+    char* set_data(size_t n);                   // Write data to the result
     // Returns nullptr if holding bytes
     absl::cord_internal::CordRep* tree() const;
     absl::cord_internal::CordRep* as_tree() const;
+    const char* as_chars() const;
     // Returns non-null iff was holding a pointer
     absl::cord_internal::CordRep* clear();
     // Converts to pointer if necessary.
@@ -791,33 +873,15 @@ class Cord {
     void PrependTreeToTree(CordRep* tree, MethodIdentifier method);
     void PrependTree(CordRep* tree, MethodIdentifier method);
 
-    template <bool has_length>
-    void GetAppendRegion(char** region, size_t* size, size_t length);
-
     bool IsSame(const InlineRep& other) const {
       return memcmp(&data_, &other.data_, sizeof(data_)) == 0;
     }
-    int BitwiseCompare(const InlineRep& other) const {
-      uint64_t x, y;
-      // Use memcpy to avoid aliasing issues.
-      memcpy(&x, &data_, sizeof(x));
-      memcpy(&y, &other.data_, sizeof(y));
-      if (x == y) {
-        memcpy(&x, reinterpret_cast<const char*>(&data_) + 8, sizeof(x));
-        memcpy(&y, reinterpret_cast<const char*>(&other.data_) + 8, sizeof(y));
-        if (x == y) return 0;
-      }
-      return absl::big_endian::FromHost64(x) < absl::big_endian::FromHost64(y)
-                 ? -1
-                 : 1;
-    }
     void CopyTo(std::string* dst) const {
       // memcpy is much faster when operating on a known size. On most supported
       // platforms, the small string optimization is large enough that resizing
       // to 15 bytes does not cause a memory allocation.
-      absl::strings_internal::STLStringResizeUninitialized(dst,
-                                                           sizeof(data_) - 1);
-      memcpy(&(*dst)[0], &data_, sizeof(data_) - 1);
+      absl::strings_internal::STLStringResizeUninitialized(dst, kMaxInline);
+      memcpy(&(*dst)[0], data_.as_chars(), kMaxInline);
       // erase is faster than resize because the logic for memory allocation is
       // not needed.
       dst->erase(inline_size());
@@ -831,6 +895,11 @@ class Cord {
     // Returns true if the Cord is being profiled by cordz.
     bool is_profiled() const { return data_.is_tree() && data_.is_profiled(); }
 
+    // Returns the available inlined capacity, or 0 if is_tree() == true.
+    size_t remaining_inline_capacity() const {
+      return data_.is_tree() ? 0 : kMaxInline - data_.inline_size();
+    }
+
     // Returns the profiled CordzInfo, or nullptr if not sampled.
     absl::cord_internal::CordzInfo* cordz_info() const {
       return data_.cordz_info();
@@ -857,13 +926,17 @@ class Cord {
     void set_inline_size(size_t size) { data_.set_inline_size(size); }
     size_t inline_size() const { return data_.inline_size(); }
 
+    // Empty cords that carry a checksum have a CordRepCrc node with a null
+    // child node. The code can avoid lots of special cases where it would
+    // otherwise transition from tree to inline storage if we just remove the
+    // CordRepCrc node before mutations. Must never be called inside a
+    // CordzUpdateScope since it untracks the cordz info.
+    void MaybeRemoveEmptyCrcNode();
+
     cord_internal::InlineData data_;
   };
   InlineRep contents_;
 
-  // Helper for MemoryUsage().
-  static size_t MemoryUsageAux(const absl::cord_internal::CordRep* rep);
-
   // Helper for GetFlat() and TryFlat().
   static bool GetFlatAux(absl::cord_internal::CordRep* rep,
                          absl::string_view* fragment);
@@ -901,6 +974,16 @@ class Cord {
   template <typename C>
   void AppendImpl(C&& src);
 
+  // Appends / Prepends `src` to this instance, using precise sizing.
+  // This method does explicitly not attempt to use any spare capacity
+  // in any pending last added private owned flat.
+  // Requires `src` to be <= kMaxFlatLength.
+  void AppendPrecise(absl::string_view src, MethodIdentifier method);
+  void PrependPrecise(absl::string_view src, MethodIdentifier method);
+
+  CordBuffer GetAppendBufferSlowPath(size_t block_size, size_t capacity,
+                                     size_t min_capacity);
+
   // Prepends the provided data to this instance. `method` contains the public
   // API method for this action which is tracked for Cordz sampling purposes.
   void PrependArray(absl::string_view src, MethodIdentifier method);
@@ -937,17 +1020,17 @@ namespace cord_internal {
 
 // Fast implementation of memmove for up to 15 bytes. This implementation is
 // safe for overlapping regions. If nullify_tail is true, the destination is
-// padded with '\0' up to 16 bytes.
-inline void SmallMemmove(char* dst, const char* src, size_t n,
-                         bool nullify_tail = false) {
+// padded with '\0' up to 15 bytes.
+template <bool nullify_tail = false>
+inline void SmallMemmove(char* dst, const char* src, size_t n) {
   if (n >= 8) {
-    assert(n <= 16);
+    assert(n <= 15);
     uint64_t buf1;
     uint64_t buf2;
     memcpy(&buf1, src, 8);
     memcpy(&buf2, src + n - 8, 8);
     if (nullify_tail) {
-      memset(dst + 8, 0, 8);
+      memset(dst + 7, 0, 8);
     }
     memcpy(dst, &buf1, 8);
     memcpy(dst + n - 8, &buf2, 8);
@@ -958,7 +1041,7 @@ inline void SmallMemmove(char* dst, const char* src, size_t n,
     memcpy(&buf2, src + n - 4, 4);
     if (nullify_tail) {
       memset(dst + 4, 0, 4);
-      memset(dst + 8, 0, 8);
+      memset(dst + 7, 0, 8);
     }
     memcpy(dst, &buf1, 4);
     memcpy(dst + n - 4, &buf2, 4);
@@ -969,29 +1052,23 @@ inline void SmallMemmove(char* dst, const char* src, size_t n,
       dst[n - 1] = src[n - 1];
     }
     if (nullify_tail) {
-      memset(dst + 8, 0, 8);
+      memset(dst + 7, 0, 8);
       memset(dst + n, 0, 8);
     }
   }
 }
 
 // Does non-template-specific `CordRepExternal` initialization.
-// Expects `data` to be non-empty.
+// Requires `data` to be non-empty.
 void InitializeCordRepExternal(absl::string_view data, CordRepExternal* rep);
 
 // Creates a new `CordRep` that owns `data` and `releaser` and returns a pointer
-// to it, or `nullptr` if `data` was empty.
+// to it. Requires `data` to be non-empty.
 template <typename Releaser>
 // NOLINTNEXTLINE - suppress clang-tidy raw pointer return.
 CordRep* NewExternalRep(absl::string_view data, Releaser&& releaser) {
+  assert(!data.empty());
   using ReleaserType = absl::decay_t<Releaser>;
-  if (data.empty()) {
-    // Never create empty external nodes.
-    InvokeReleaser(Rank0{}, ReleaserType(std::forward<Releaser>(releaser)),
-                   data);
-    return nullptr;
-  }
-
   CordRepExternal* rep = new CordRepExternalImpl<ReleaserType>(
       std::forward<Releaser>(releaser), 0);
   InitializeCordRepExternal(data, rep);
@@ -1011,10 +1088,15 @@ inline CordRep* NewExternalRep(absl::string_view data,
 template <typename Releaser>
 Cord MakeCordFromExternal(absl::string_view data, Releaser&& releaser) {
   Cord cord;
-  if (auto* rep = ::absl::cord_internal::NewExternalRep(
-          data, std::forward<Releaser>(releaser))) {
-    cord.contents_.EmplaceTree(rep,
+  if (ABSL_PREDICT_TRUE(!data.empty())) {
+    cord.contents_.EmplaceTree(::absl::cord_internal::NewExternalRep(
+                                   data, std::forward<Releaser>(releaser)),
                                Cord::MethodIdentifier::kMakeCordFromExternal);
+  } else {
+    using ReleaserType = absl::decay_t<Releaser>;
+    cord_internal::InvokeReleaser(
+        cord_internal::Rank0{}, ReleaserType(std::forward<Releaser>(releaser)),
+        data);
   }
   return cord;
 }
@@ -1069,6 +1151,11 @@ inline const char* Cord::InlineRep::data() const {
   return is_tree() ? nullptr : data_.as_chars();
 }
 
+inline const char* Cord::InlineRep::as_chars() const {
+  assert(!data_.is_tree());
+  return data_.as_chars();
+}
+
 inline absl::cord_internal::CordRep* Cord::InlineRep::as_tree() const {
   assert(data_.is_tree());
   return data_.as_tree();
@@ -1094,7 +1181,7 @@ inline cord_internal::CordRepFlat* Cord::InlineRep::MakeFlatWithExtraCapacity(
   size_t len = data_.inline_size();
   auto* result = CordRepFlat::New(len + extra);
   result->length = len;
-  memcpy(result->Data(), data_.as_chars(), sizeof(data_));
+  memcpy(result->Data(), data_.as_chars(), InlineRep::kMaxInline);
   return result;
 }
 
@@ -1156,6 +1243,18 @@ inline void Cord::InlineRep::CopyToArray(char* dst) const {
   cord_internal::SmallMemmove(dst, data_.as_chars(), n);
 }
 
+inline void Cord::InlineRep::MaybeRemoveEmptyCrcNode() {
+  CordRep* rep = tree();
+  if (rep == nullptr || ABSL_PREDICT_TRUE(rep->length > 0)) {
+    return;
+  }
+  assert(rep->IsCrc());
+  assert(rep->crc()->child == nullptr);
+  CordzInfo::MaybeUntrackCord(cordz_info());
+  CordRep::Unref(rep);
+  ResetToEmpty();
+}
+
 constexpr inline Cord::Cord() noexcept {}
 
 inline Cord::Cord(absl::string_view src)
@@ -1205,12 +1304,17 @@ inline size_t Cord::size() const {
   return contents_.size();
 }
 
-inline bool Cord::empty() const { return contents_.empty(); }
+inline bool Cord::empty() const { return size() == 0; }
 
-inline size_t Cord::EstimatedMemoryUsage() const {
+inline size_t Cord::EstimatedMemoryUsage(
+    CordMemoryAccounting accounting_method) const {
   size_t result = sizeof(Cord);
   if (const absl::cord_internal::CordRep* rep = contents_.tree()) {
-    result += MemoryUsageAux(rep);
+    if (accounting_method == CordMemoryAccounting::kFairShare) {
+      result += cord_internal::GetEstimatedFairShareMemoryUsage(rep);
+    } else {
+      result += cord_internal::GetEstimatedMemoryUsage(rep);
+    }
   }
   return result;
 }
@@ -1248,12 +1352,47 @@ inline void Cord::Prepend(absl::string_view src) {
   PrependArray(src, CordzUpdateTracker::kPrependString);
 }
 
+inline void Cord::Append(CordBuffer buffer) {
+  if (ABSL_PREDICT_FALSE(buffer.length() == 0)) return;
+  absl::string_view short_value;
+  if (CordRep* rep = buffer.ConsumeValue(short_value)) {
+    contents_.AppendTree(rep, CordzUpdateTracker::kAppendCordBuffer);
+  } else {
+    AppendPrecise(short_value, CordzUpdateTracker::kAppendCordBuffer);
+  }
+}
+
+inline void Cord::Prepend(CordBuffer buffer) {
+  if (ABSL_PREDICT_FALSE(buffer.length() == 0)) return;
+  absl::string_view short_value;
+  if (CordRep* rep = buffer.ConsumeValue(short_value)) {
+    contents_.PrependTree(rep, CordzUpdateTracker::kPrependCordBuffer);
+  } else {
+    PrependPrecise(short_value, CordzUpdateTracker::kPrependCordBuffer);
+  }
+}
+
+inline CordBuffer Cord::GetAppendBuffer(size_t capacity, size_t min_capacity) {
+  if (empty()) return CordBuffer::CreateWithDefaultLimit(capacity);
+  return GetAppendBufferSlowPath(0, capacity, min_capacity);
+}
+
+inline CordBuffer Cord::GetCustomAppendBuffer(size_t block_size,
+                                              size_t capacity,
+                                              size_t min_capacity) {
+  if (empty()) {
+    return block_size ? CordBuffer::CreateWithCustomLimit(block_size, capacity)
+                      : CordBuffer::CreateWithDefaultLimit(capacity);
+  }
+  return GetAppendBufferSlowPath(block_size, capacity, min_capacity);
+}
+
 extern template void Cord::Append(std::string&& src);
 extern template void Cord::Prepend(std::string&& src);
 
 inline int Cord::Compare(const Cord& rhs) const {
   if (!contents_.is_tree() && !rhs.contents_.is_tree()) {
-    return contents_.BitwiseCompare(rhs.contents_);
+    return contents_.data_.Compare(rhs.contents_.data_);
   }
 
   return CompareImpl(rhs);
@@ -1274,27 +1413,31 @@ inline bool Cord::StartsWith(absl::string_view rhs) const {
 }
 
 inline void Cord::ChunkIterator::InitTree(cord_internal::CordRep* tree) {
+  tree = cord_internal::SkipCrcNode(tree);
   if (tree->tag == cord_internal::BTREE) {
     current_chunk_ = btree_reader_.Init(tree->btree());
-    return;
+  } else {
+    current_leaf_ = tree;
+    current_chunk_ = cord_internal::EdgeData(tree);
   }
-
-  stack_of_right_children_.push_back(tree);
-  operator++();
 }
 
-inline Cord::ChunkIterator::ChunkIterator(cord_internal::CordRep* tree)
-    : bytes_remaining_(tree->length) {
+inline Cord::ChunkIterator::ChunkIterator(cord_internal::CordRep* tree) {
+  bytes_remaining_ = tree->length;
   InitTree(tree);
 }
 
-inline Cord::ChunkIterator::ChunkIterator(const Cord* cord)
-    : bytes_remaining_(cord->size()) {
-  if (cord->contents_.is_tree()) {
-    InitTree(cord->contents_.as_tree());
+inline Cord::ChunkIterator::ChunkIterator(const Cord* cord) {
+  if (CordRep* tree = cord->contents_.tree()) {
+    bytes_remaining_ = tree->length;
+    if (ABSL_PREDICT_TRUE(bytes_remaining_ != 0)) {
+      InitTree(tree);
+    } else {
+      current_chunk_ = {};
+    }
   } else {
-    current_chunk_ =
-        absl::string_view(cord->contents_.data(), bytes_remaining_);
+    bytes_remaining_ = cord->contents_.inline_size();
+    current_chunk_ = {cord->contents_.data(), bytes_remaining_};
   }
 }
 
@@ -1324,8 +1467,11 @@ inline Cord::ChunkIterator& Cord::ChunkIterator::operator++() {
   assert(bytes_remaining_ >= current_chunk_.size());
   bytes_remaining_ -= current_chunk_.size();
   if (bytes_remaining_ > 0) {
-    return btree_reader_ ? AdvanceBtree() : AdvanceStack();
-  } else {
+    if (btree_reader_) {
+      return AdvanceBtree();
+    } else {
+      assert(!current_chunk_.empty());  // Called on invalid iterator.
+    }
     current_chunk_ = {};
   }
   return *this;
@@ -1366,7 +1512,11 @@ inline void Cord::ChunkIterator::AdvanceBytes(size_t n) {
   if (ABSL_PREDICT_TRUE(n < current_chunk_.size())) {
     RemoveChunkPrefix(n);
   } else if (n != 0) {
-    btree_reader_ ? AdvanceBytesBtree(n) : AdvanceBytesSlowPath(n);
+    if (btree_reader_) {
+      AdvanceBytesBtree(n);
+    } else {
+      bytes_remaining_ = 0;
+    }
   }
 }
 
@@ -1453,11 +1603,11 @@ inline void Cord::ForEachChunk(
   if (rep == nullptr) {
     callback(absl::string_view(contents_.data(), contents_.size()));
   } else {
-    return ForEachChunkAux(rep, callback);
+    ForEachChunkAux(rep, callback);
   }
 }
 
-// Nonmember Cord-to-Cord relational operarators.
+// Nonmember Cord-to-Cord relational operators.
 inline bool operator==(const Cord& lhs, const Cord& rhs) {
   if (lhs.contents_.IsSame(rhs.contents_)) return true;
   size_t rhs_size = rhs.size();
@@ -1508,7 +1658,6 @@ class CordTestAccess {
  public:
   static size_t FlatOverhead();
   static size_t MaxFlatLength();
-  static size_t SizeofCordRepConcat();
   static size_t SizeofCordRepExternal();
   static size_t SizeofCordRepSubstring();
   static size_t FlatTagToLength(uint8_t tag);
diff --git a/third_party/abseil-cpp/absl/strings/cord_analysis.cc b/third_party/abseil-cpp/absl/strings/cord_analysis.cc
new file mode 100644
index 0000000000..73d3c4e6ff
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/cord_analysis.cc
@@ -0,0 +1,188 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/cord_analysis.h"
+
+#include <cstddef>
+#include <cstdint>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/container/inlined_vector.h"
+#include "absl/strings/internal/cord_data_edge.h"
+#include "absl/strings/internal/cord_internal.h"
+#include "absl/strings/internal/cord_rep_btree.h"
+#include "absl/strings/internal/cord_rep_crc.h"
+#include "absl/strings/internal/cord_rep_flat.h"
+#include "absl/strings/internal/cord_rep_ring.h"
+//
+#include "absl/base/macros.h"
+#include "absl/base/port.h"
+#include "absl/functional/function_ref.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+namespace {
+
+// Accounting mode for analyzing memory usage.
+enum class Mode { kTotal, kFairShare };
+
+// CordRepRef holds a `const CordRep*` reference in rep, and depending on mode,
+// holds a 'fraction' representing a cumulative inverse refcount weight.
+template <Mode mode>
+struct CordRepRef {
+  // Instantiates a CordRepRef instance.
+  explicit CordRepRef(const CordRep* r) : rep(r) {}
+
+  // Creates a child reference holding the provided child.
+  // Overloaded to add cumulative reference count for kFairShare.
+  CordRepRef Child(const CordRep* child) const { return CordRepRef(child); }
+
+  const CordRep* rep;
+};
+
+// RawUsage holds the computed total number of bytes.
+template <Mode mode>
+struct RawUsage {
+  size_t total = 0;
+
+  // Add 'size' to total, ignoring the CordRepRef argument.
+  void Add(size_t size, CordRepRef<mode>) { total += size; }
+};
+
+// Returns n / refcount avoiding a div for the common refcount == 1.
+template <typename refcount_t>
+double MaybeDiv(double d, refcount_t refcount) {
+  return refcount == 1 ? d : d / refcount;
+}
+
+// Overloaded 'kFairShare' specialization for CordRepRef. This class holds a
+// `fraction` value which represents a cumulative inverse refcount weight.
+// For example, a top node with a reference count of 2 will have a fraction
+// value of 1/2 = 0.5, representing the 'fair share' of memory it references.
+// A node below such a node with a reference count of 5 then has a fraction of
+// 0.5 / 5 = 0.1 representing the fair share of memory below that node, etc.
+template <>
+struct CordRepRef<Mode::kFairShare> {
+  // Creates a CordRepRef with the provided rep and top (parent) fraction.
+  explicit CordRepRef(const CordRep* r, double frac = 1.0)
+      : rep(r), fraction(MaybeDiv(frac, r->refcount.Get())) {}
+
+  // Returns a CordRepRef with a fraction of `this->fraction / child.refcount`
+  CordRepRef Child(const CordRep* child) const {
+    return CordRepRef(child, fraction);
+  }
+
+  const CordRep* rep;
+  double fraction;
+};
+
+// Overloaded 'kFairShare' specialization for RawUsage
+template <>
+struct RawUsage<Mode::kFairShare> {
+  double total = 0;
+
+  // Adds `size` multiplied by `rep.fraction` to the total size.
+  void Add(size_t size, CordRepRef<Mode::kFairShare> rep) {
+    total += static_cast<double>(size) * rep.fraction;
+  }
+};
+
+// Computes the estimated memory size of the provided data edge.
+// External reps are assumed 'heap allocated at their exact size'.
+template <Mode mode>
+void AnalyzeDataEdge(CordRepRef<mode> rep, RawUsage<mode>& raw_usage) {
+  assert(IsDataEdge(rep.rep));
+
+  // Consume all substrings
+  if (rep.rep->tag == SUBSTRING) {
+    raw_usage.Add(sizeof(CordRepSubstring), rep);
+    rep = rep.Child(rep.rep->substring()->child);
+  }
+
+  // Consume FLAT / EXTERNAL
+  const size_t size =
+      rep.rep->tag >= FLAT
+          ? rep.rep->flat()->AllocatedSize()
+          : rep.rep->length + sizeof(CordRepExternalImpl<intptr_t>);
+  raw_usage.Add(size, rep);
+}
+
+// Computes the memory size of the provided Ring tree.
+template <Mode mode>
+void AnalyzeRing(CordRepRef<mode> rep, RawUsage<mode>& raw_usage) {
+  const CordRepRing* ring = rep.rep->ring();
+  raw_usage.Add(CordRepRing::AllocSize(ring->capacity()), rep);
+  ring->ForEach([&](CordRepRing::index_type pos) {
+    AnalyzeDataEdge(rep.Child(ring->entry_child(pos)), raw_usage);
+  });
+}
+
+// Computes the memory size of the provided Btree tree.
+template <Mode mode>
+void AnalyzeBtree(CordRepRef<mode> rep, RawUsage<mode>& raw_usage) {
+  raw_usage.Add(sizeof(CordRepBtree), rep);
+  const CordRepBtree* tree = rep.rep->btree();
+  if (tree->height() > 0) {
+    for (CordRep* edge : tree->Edges()) {
+      AnalyzeBtree(rep.Child(edge), raw_usage);
+    }
+  } else {
+    for (CordRep* edge : tree->Edges()) {
+      AnalyzeDataEdge(rep.Child(edge), raw_usage);
+    }
+  }
+}
+
+template <Mode mode>
+size_t GetEstimatedUsage(const CordRep* rep) {
+  // Zero initialized memory usage totals.
+  RawUsage<mode> raw_usage;
+
+  // Capture top level node and refcount into a CordRepRef.
+  CordRepRef<mode> repref(rep);
+
+  // Consume the top level CRC node if present.
+  if (repref.rep->tag == CRC) {
+    raw_usage.Add(sizeof(CordRepCrc), repref);
+    repref = repref.Child(repref.rep->crc()->child);
+  }
+
+  if (IsDataEdge(repref.rep)) {
+    AnalyzeDataEdge(repref, raw_usage);
+  } else if (repref.rep->tag == BTREE) {
+    AnalyzeBtree(repref, raw_usage);
+  } else if (repref.rep->tag == RING) {
+    AnalyzeRing(repref, raw_usage);
+  } else {
+    assert(false);
+  }
+
+  return static_cast<size_t>(raw_usage.total);
+}
+
+}  // namespace
+
+size_t GetEstimatedMemoryUsage(const CordRep* rep) {
+  return GetEstimatedUsage<Mode::kTotal>(rep);
+}
+
+size_t GetEstimatedFairShareMemoryUsage(const CordRep* rep) {
+  return GetEstimatedUsage<Mode::kFairShare>(rep);
+}
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/cord_analysis.h b/third_party/abseil-cpp/absl/strings/cord_analysis.h
new file mode 100644
index 0000000000..7041ad1aa5
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/cord_analysis.h
@@ -0,0 +1,44 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_STRINGS_CORD_ANALYSIS_H_
+#define ABSL_STRINGS_CORD_ANALYSIS_H_
+
+#include <cstddef>
+#include <cstdint>
+
+#include "absl/base/config.h"
+#include "absl/strings/internal/cord_internal.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+
+// Returns the *approximate* number of bytes held in full or in part by this
+// Cord (which may not remain the same between invocations). Cords that share
+// memory could each be "charged" independently for the same shared memory.
+size_t GetEstimatedMemoryUsage(const CordRep* rep);
+
+// Returns the *approximate* number of bytes held in full or in part by this
+// CordRep weighted by the sharing ratio of that data. For example, if some data
+// edge is shared by 4 different Cords, then each cord is attribute 1/4th of
+// the total memory usage as a 'fair share' of the total memory usage.
+size_t GetEstimatedFairShareMemoryUsage(const CordRep* rep);
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+
+#endif  // ABSL_STRINGS_CORD_ANALYSIS_H_
diff --git a/third_party/abseil-cpp/absl/strings/cord_buffer.cc b/third_party/abseil-cpp/absl/strings/cord_buffer.cc
new file mode 100644
index 0000000000..fad6269cb9
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/cord_buffer.cc
@@ -0,0 +1,30 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/cord_buffer.h"
+
+#include <cstddef>
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr size_t CordBuffer::kDefaultLimit;
+constexpr size_t CordBuffer::kCustomLimit;
+#endif
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/cord_buffer.h b/third_party/abseil-cpp/absl/strings/cord_buffer.h
new file mode 100644
index 0000000000..15494b31e0
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/cord_buffer.h
@@ -0,0 +1,575 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: cord_buffer.h
+// -----------------------------------------------------------------------------
+//
+// This file defines an `absl::CordBuffer` data structure to hold data for
+// eventual inclusion within an existing `Cord` data structure. Cord buffers are
+// useful for building large Cords that may require custom allocation of its
+// associated memory.
+//
+#ifndef ABSL_STRINGS_CORD_BUFFER_H_
+#define ABSL_STRINGS_CORD_BUFFER_H_
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <utility>
+
+#include "absl/base/config.h"
+#include "absl/base/macros.h"
+#include "absl/numeric/bits.h"
+#include "absl/strings/internal/cord_internal.h"
+#include "absl/strings/internal/cord_rep_flat.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+class Cord;
+class CordBufferTestPeer;
+
+// CordBuffer
+//
+// CordBuffer manages memory buffers for purposes such as zero-copy APIs as well
+// as applications building cords with large data requiring granular control
+// over the allocation and size of cord data. For example, a function creating
+// a cord of random data could use a CordBuffer as follows:
+//
+//   absl::Cord CreateRandomCord(size_t length) {
+//     absl::Cord cord;
+//     while (length > 0) {
+//       CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(length);
+//       absl::Span<char> data = buffer.available_up_to(length);
+//       FillRandomValues(data.data(), data.size());
+//       buffer.IncreaseLengthBy(data.size());
+//       cord.Append(std::move(buffer));
+//       length -= data.size();
+//     }
+//     return cord;
+//   }
+//
+// CordBuffer instances are by default limited to a capacity of `kDefaultLimit`
+// bytes. `kDefaultLimit` is currently just under 4KiB, but this default may
+// change in the future and/or for specific architectures. The default limit is
+// aimed to provide a good trade-off between performance and memory overhead.
+// Smaller buffers typically incur more compute cost while larger buffers are
+// more CPU efficient but create significant memory overhead because of such
+// allocations being less granular. Using larger buffers may also increase the
+// risk of memory fragmentation.
+//
+// Applications create a buffer using one of the `CreateWithDefaultLimit()` or
+// `CreateWithCustomLimit()` methods. The returned instance will have a non-zero
+// capacity and a zero length. Applications use the `data()` method to set the
+// contents of the managed memory, and once done filling the buffer, use the
+// `IncreaseLengthBy()` or 'SetLength()' method to specify the length of the
+// initialized data before adding the buffer to a Cord.
+//
+// The `CreateWithCustomLimit()` method is intended for applications needing
+// larger buffers than the default memory limit, allowing the allocation of up
+// to a capacity of `kCustomLimit` bytes minus some minimum internal overhead.
+// The usage of `CreateWithCustomLimit()` should be limited to only those use
+// cases where the distribution of the input is relatively well known, and/or
+// where the trade-off between the efficiency gains outweigh the risk of memory
+// fragmentation. See the documentation for `CreateWithCustomLimit()` for more
+// information on using larger custom limits.
+//
+// The capacity of a `CordBuffer` returned by one of the `Create` methods may
+// be larger than the requested capacity due to rounding, alignment and
+// granularity of the memory allocator. Applications should use the `capacity`
+// method to obtain the effective capacity of the returned instance as
+// demonstrated in the provided example above.
+//
+// CordBuffer is a move-only class. All references into the managed memory are
+// invalidated when an instance is moved into either another CordBuffer instance
+// or a Cord. Writing to a location obtained by a previous call to `data()`
+// after an instance was moved will lead to undefined behavior.
+//
+// A `moved from` CordBuffer instance will have a valid, but empty state.
+// CordBuffer is thread compatible.
+class CordBuffer {
+ public:
+  // kDefaultLimit
+  //
+  // Default capacity limits of allocated CordBuffers.
+  // See the class comments for more information on allocation limits.
+  static constexpr size_t kDefaultLimit = cord_internal::kMaxFlatLength;
+
+  // kCustomLimit
+  //
+  // Maximum size for CreateWithCustomLimit() allocated buffers.
+  // Note that the effective capacity may be slightly less
+  // because of internal overhead of internal cord buffers.
+  static constexpr size_t kCustomLimit = 64U << 10;
+
+  // Constructors, Destructors and Assignment Operators
+
+  // Creates an empty CordBuffer.
+  CordBuffer() = default;
+
+  // Destroys this CordBuffer instance and, if not empty, releases any memory
+  // managed by this instance, invalidating previously returned references.
+  ~CordBuffer();
+
+  // CordBuffer is move-only
+  CordBuffer(CordBuffer&& rhs) noexcept;
+  CordBuffer& operator=(CordBuffer&&) noexcept;
+  CordBuffer(const CordBuffer&) = delete;
+  CordBuffer& operator=(const CordBuffer&) = delete;
+
+  // CordBuffer::MaximumPayload()
+  //
+  // Returns the guaranteed maximum payload for a CordBuffer returned by the
+  // `CreateWithDefaultLimit()` method. While small, each internal buffer inside
+  // a Cord incurs an overhead to manage the length, type and reference count
+  // for the buffer managed inside the cord tree. Applications can use this
+  // method to get approximate number of buffers required for a given byte
+  // size, etc.
+  //
+  // For example:
+  //   const size_t payload = absl::CordBuffer::MaximumPayload();
+  //   const size_t buffer_count = (total_size + payload - 1) / payload;
+  //   buffers.reserve(buffer_count);
+  static constexpr size_t MaximumPayload();
+
+  // Overload to the above `MaximumPayload()` except that it returns the
+  // maximum payload for a CordBuffer returned by the `CreateWithCustomLimit()`
+  // method given the provided `block_size`.
+  static constexpr size_t MaximumPayload(size_t block_size);
+
+  // CordBuffer::CreateWithDefaultLimit()
+  //
+  // Creates a CordBuffer instance of the desired `capacity`, capped at the
+  // default limit `kDefaultLimit`. The returned buffer has a guaranteed
+  // capacity of at least `min(kDefaultLimit, capacity)`. See the class comments
+  // for more information on buffer capacities and intended usage.
+  static CordBuffer CreateWithDefaultLimit(size_t capacity);
+
+
+  // CordBuffer::CreateWithCustomLimit()
+  //
+  // Creates a CordBuffer instance of the desired `capacity` rounded to an
+  // appropriate power of 2 size less than, or equal to `block_size`.
+  // Requires `block_size` to be a power of 2.
+  //
+  // If `capacity` is less than or equal to `kDefaultLimit`, then this method
+  // behaves identical to `CreateWithDefaultLimit`, which means that the caller
+  // is guaranteed to get a buffer of at least the requested capacity.
+  //
+  // If `capacity` is greater than or equal to `block_size`, then this method
+  // returns a buffer with an `allocated size` of `block_size` bytes. Otherwise,
+  // this methods returns a buffer with a suitable smaller power of 2 block size
+  // to satisfy the request. The actual size depends on a number of factors, and
+  // is typically (but not necessarily) the highest or second highest power of 2
+  // value less than or equal to `capacity`.
+  //
+  // The 'allocated size' includes a small amount of overhead required for
+  // internal state, which is currently 13 bytes on 64-bit platforms. For
+  // example: a buffer created with `block_size` and `capacity' set to 8KiB
+  // will have an allocated size of 8KiB, and an effective internal `capacity`
+  // of 8KiB - 13 = 8179 bytes.
+  //
+  // To demonstrate this in practice, let's assume we want to read data from
+  // somewhat larger files using approximately 64KiB buffers:
+  //
+  //   absl::Cord ReadFromFile(int fd, size_t n) {
+  //     absl::Cord cord;
+  //     while (n > 0) {
+  //       CordBuffer buffer = CordBuffer::CreateWithCustomLimit(64 << 10, n);
+  //       absl::Span<char> data = buffer.available_up_to(n);
+  //       ReadFileDataOrDie(fd, data.data(), data.size());
+  //       buffer.IncreaseLengthBy(data.size());
+  //       cord.Append(std::move(buffer));
+  //       n -= data.size();
+  //     }
+  //     return cord;
+  //   }
+  //
+  // If we'd use this function to read a file of 659KiB, we may get the
+  // following pattern of allocated cord buffer sizes:
+  //
+  //   CreateWithCustomLimit(64KiB, 674816) --> ~64KiB (65523)
+  //   CreateWithCustomLimit(64KiB, 674816) --> ~64KiB (65523)
+  //   ...
+  //   CreateWithCustomLimit(64KiB,  19586) --> ~16KiB (16371)
+  //   CreateWithCustomLimit(64KiB,   3215) -->   3215 (at least 3215)
+  //
+  // The reason the method returns a 16K buffer instead of a roughly 19K buffer
+  // is to reduce memory overhead and fragmentation risks. Using carefully
+  // chosen power of 2 values reduces the entropy of allocated memory sizes.
+  //
+  // Additionally, let's assume we'd use the above function on files that are
+  // generally smaller than 64K. If we'd use 'precise' sized buffers for such
+  // files, than we'd get a very wide distribution of allocated memory sizes
+  // rounded to 4K page sizes, and we'd end up with a lot of unused capacity.
+  //
+  // In general, application should only use custom sizes if the data they are
+  // consuming or storing is expected to be many times the chosen block size,
+  // and be based on objective data and performance metrics. For example, a
+  // compress function may work faster and consume less CPU when using larger
+  // buffers. Such an application should pick a size offering a reasonable
+  // trade-off between expected data size, compute savings with larger buffers,
+  // and the cost or fragmentation effect of larger buffers.
+  // Applications must pick a reasonable spot on that curve, and make sure their
+  // data meets their expectations in size distributions such as "mostly large".
+  static CordBuffer CreateWithCustomLimit(size_t block_size, size_t capacity);
+
+  // CordBuffer::available()
+  //
+  // Returns the span delineating the available capacity in this buffer
+  // which is defined as `{ data() + length(), capacity() - length() }`.
+  absl::Span<char> available();
+
+  // CordBuffer::available_up_to()
+  //
+  // Returns the span delineating the available capacity in this buffer limited
+  // to `size` bytes. This is equivalent to `available().subspan(0, size)`.
+  absl::Span<char> available_up_to(size_t size);
+
+  // CordBuffer::data()
+  //
+  // Returns a non-null reference to the data managed by this instance.
+  // Applications are allowed to write up to `capacity` bytes of instance data.
+  // CordBuffer data is uninitialized by default. Reading data from an instance
+  // that has not yet been initialized will lead to undefined behavior.
+  char* data();
+  const char* data() const;
+
+  // CordBuffer::length()
+  //
+  // Returns the length of this instance. The default length of a CordBuffer is
+  // 0, indicating an 'empty' CordBuffer. Applications must specify the length
+  // of the data in a CordBuffer before adding it to a Cord.
+  size_t length() const;
+
+  // CordBuffer::capacity()
+  //
+  // Returns the capacity of this instance. All instances have a non-zero
+  // capacity: default and `moved from` instances have a small internal buffer.
+  size_t capacity() const;
+
+  // CordBuffer::IncreaseLengthBy()
+  //
+  // Increases the length of this buffer by the specified 'n' bytes.
+  // Applications must make sure all data in this buffer up to the new length
+  // has been initialized before adding a CordBuffer to a Cord: failure to do so
+  // will lead to undefined behavior.  Requires `length() + n <= capacity()`.
+  // Typically, applications will use 'available_up_to()` to get a span of the
+  // desired capacity, and use `span.size()` to increase the length as in:
+  //   absl::Span<char> span = buffer.available_up_to(desired);
+  //   buffer.IncreaseLengthBy(span.size());
+  //   memcpy(span.data(), src, span.size());
+  //   etc...
+  void IncreaseLengthBy(size_t n);
+
+  // CordBuffer::SetLength()
+  //
+  // Sets the data length of this instance. Applications must make sure all data
+  // of the specified length has been initialized before adding a CordBuffer to
+  // a Cord: failure to do so will lead to undefined behavior.
+  // Setting the length to a small value or zero does not release any memory
+  // held by this CordBuffer instance. Requires `length <= capacity()`.
+  // Applications should preferably use the `IncreaseLengthBy()` method above
+  // in combination with the 'available()` or `available_up_to()` methods.
+  void SetLength(size_t length);
+
+ private:
+  // Make sure we don't accidentally over promise.
+  static_assert(kCustomLimit <= cord_internal::kMaxLargeFlatSize, "");
+
+  // Assume the cost of an 'uprounded' allocation to CeilPow2(size) versus
+  // the cost of allocating at least 1 extra flat <= 4KB:
+  // - Flat overhead = 13 bytes
+  // - Btree amortized cost / node =~ 13 bytes
+  // - 64 byte granularity of tcmalloc at 4K =~ 32 byte average
+  // CPU cost and efficiency requires we should at least 'save' something by
+  // splitting, as a poor man's measure, we say the slop needs to be
+  // at least double the cost offset to make it worth splitting: ~128 bytes.
+  static constexpr size_t kMaxPageSlop = 128;
+
+  // Overhead for allocation a flat.
+  static constexpr size_t kOverhead = cord_internal::kFlatOverhead;
+
+  using CordRepFlat = cord_internal::CordRepFlat;
+
+  // `Rep` is the internal data representation of a CordBuffer. The internal
+  // representation has an internal small size optimization similar to
+  // std::string (SSO).
+  struct Rep {
+    // Inline SSO size of a CordBuffer
+    static constexpr size_t kInlineCapacity = sizeof(intptr_t) * 2 - 1;
+
+    // Creates a default instance with kInlineCapacity.
+    Rep() : short_rep{} {}
+
+    // Creates an instance managing an allocated non zero CordRep.
+    explicit Rep(cord_internal::CordRepFlat* rep) : long_rep{rep} {
+      assert(rep != nullptr);
+    }
+
+    // Returns true if this instance manages the SSO internal buffer.
+    bool is_short() const {
+      constexpr size_t offset = offsetof(Short, raw_size);
+      return (reinterpret_cast<const char*>(this)[offset] & 1) != 0;
+    }
+
+    // Returns the available area of the internal SSO data
+    absl::Span<char> short_available() {
+      const size_t length = short_length();
+      return absl::Span<char>(short_rep.data + length,
+                              kInlineCapacity - length);
+    }
+
+    // Returns the available area of the internal SSO data
+    absl::Span<char> long_available() {
+      assert(!is_short());
+      const size_t length = long_rep.rep->length;
+      return absl::Span<char>(long_rep.rep->Data() + length,
+                              long_rep.rep->Capacity() - length);
+    }
+
+    // Returns the length of the internal SSO data.
+    size_t short_length() const {
+      assert(is_short());
+      return static_cast<size_t>(short_rep.raw_size >> 1);
+    }
+
+    // Sets the length of the internal SSO data.
+    // Disregards any previously set CordRep instance.
+    void set_short_length(size_t length) {
+      short_rep.raw_size = static_cast<char>((length << 1) + 1);
+    }
+
+    // Adds `n` to the current short length.
+    void add_short_length(size_t n) {
+      assert(is_short());
+      short_rep.raw_size += static_cast<char>(n << 1);
+    }
+
+    // Returns reference to the internal SSO data buffer.
+    char* data() {
+      assert(is_short());
+      return short_rep.data;
+    }
+    const char* data() const {
+      assert(is_short());
+      return short_rep.data;
+    }
+
+    // Returns a pointer the external CordRep managed by this instance.
+    cord_internal::CordRepFlat* rep() const {
+      assert(!is_short());
+      return long_rep.rep;
+    }
+
+    // The internal representation takes advantage of the fact that allocated
+    // memory is always on an even address, and uses the least significant bit
+    // of the first or last byte (depending on endianness) as the inline size
+    // indicator overlapping with the least significant byte of the CordRep*.
+#if defined(ABSL_IS_BIG_ENDIAN)
+    struct Long {
+      explicit Long(cord_internal::CordRepFlat* rep_arg) : rep(rep_arg) {}
+      void* padding;
+      cord_internal::CordRepFlat* rep;
+    };
+    struct Short {
+      char data[sizeof(Long) - 1];
+      char raw_size = 1;
+    };
+#else
+    struct Long {
+      explicit Long(cord_internal::CordRepFlat* rep_arg) : rep(rep_arg) {}
+      cord_internal::CordRepFlat* rep;
+      void* padding;
+    };
+    struct Short {
+      char raw_size = 1;
+      char data[sizeof(Long) - 1];
+    };
+#endif
+
+    union {
+      Long long_rep;
+      Short short_rep;
+    };
+  };
+
+  // Power2 functions
+  static bool IsPow2(size_t size) { return absl::has_single_bit(size); }
+  static size_t Log2Floor(size_t size) {
+    return static_cast<size_t>(absl::bit_width(size) - 1);
+  }
+  static size_t Log2Ceil(size_t size) {
+    return static_cast<size_t>(absl::bit_width(size - 1));
+  }
+
+  // Implementation of `CreateWithCustomLimit()`.
+  // This implementation allows for future memory allocation hints to
+  // be passed down into the CordRepFlat allocation function.
+  template <typename... AllocationHints>
+  static CordBuffer CreateWithCustomLimitImpl(size_t block_size,
+                                              size_t capacity,
+                                              AllocationHints... hints);
+
+  // Consumes the value contained in this instance and resets the instance.
+  // This method returns a non-null Cordrep* if the current instances manages a
+  // CordRep*, and resets the instance to an empty SSO instance. If the current
+  // instance is an SSO instance, then this method returns nullptr and sets
+  // `short_value` to the inlined data value. In either case, the current
+  // instance length is reset to zero.
+  // This method is intended to be used by Cord internal functions only.
+  cord_internal::CordRep* ConsumeValue(absl::string_view& short_value) {
+    cord_internal::CordRep* rep = nullptr;
+    if (rep_.is_short()) {
+      short_value = absl::string_view(rep_.data(), rep_.short_length());
+    } else {
+      rep = rep_.rep();
+    }
+    rep_.set_short_length(0);
+    return rep;
+  }
+
+  // Internal constructor.
+  explicit CordBuffer(cord_internal::CordRepFlat* rep) : rep_(rep) {
+    assert(rep != nullptr);
+  }
+
+  Rep rep_;
+
+  friend class Cord;
+  friend class CordBufferTestPeer;
+};
+
+inline constexpr size_t CordBuffer::MaximumPayload() {
+  return cord_internal::kMaxFlatLength;
+}
+
+inline constexpr size_t CordBuffer::MaximumPayload(size_t block_size) {
+  // TODO(absl-team): Use std::min when C++11 support is dropped.
+  return (kCustomLimit < block_size ? kCustomLimit : block_size) -
+         cord_internal::kFlatOverhead;
+}
+
+inline CordBuffer CordBuffer::CreateWithDefaultLimit(size_t capacity) {
+  if (capacity > Rep::kInlineCapacity) {
+    auto* rep = cord_internal::CordRepFlat::New(capacity);
+    rep->length = 0;
+    return CordBuffer(rep);
+  }
+  return CordBuffer();
+}
+
+template <typename... AllocationHints>
+inline CordBuffer CordBuffer::CreateWithCustomLimitImpl(
+    size_t block_size, size_t capacity, AllocationHints... hints) {
+  assert(IsPow2(block_size));
+  capacity = (std::min)(capacity, kCustomLimit);
+  block_size = (std::min)(block_size, kCustomLimit);
+  if (capacity + kOverhead >= block_size) {
+    capacity = block_size;
+  } else if (capacity <= kDefaultLimit) {
+    capacity = capacity + kOverhead;
+  } else if (!IsPow2(capacity)) {
+    // Check if rounded up to next power 2 is a good enough fit
+    // with limited waste making it an acceptable direct fit.
+    const size_t rounded_up = size_t{1} << Log2Ceil(capacity);
+    const size_t slop = rounded_up - capacity;
+    if (slop >= kOverhead && slop <= kMaxPageSlop + kOverhead) {
+      capacity = rounded_up;
+    } else {
+      // Round down to highest power of 2 <= capacity.
+      // Consider a more aggressive step down if that may reduce the
+      // risk of fragmentation where 'people are holding it wrong'.
+      const size_t rounded_down = size_t{1} << Log2Floor(capacity);
+      capacity = rounded_down;
+    }
+  }
+  const size_t length = capacity - kOverhead;
+  auto* rep = CordRepFlat::New(CordRepFlat::Large(), length, hints...);
+  rep->length = 0;
+  return CordBuffer(rep);
+}
+
+inline CordBuffer CordBuffer::CreateWithCustomLimit(size_t block_size,
+                                                    size_t capacity) {
+  return CreateWithCustomLimitImpl(block_size, capacity);
+}
+
+inline CordBuffer::~CordBuffer() {
+  if (!rep_.is_short()) {
+    cord_internal::CordRepFlat::Delete(rep_.rep());
+  }
+}
+
+inline CordBuffer::CordBuffer(CordBuffer&& rhs) noexcept : rep_(rhs.rep_) {
+  rhs.rep_.set_short_length(0);
+}
+
+inline CordBuffer& CordBuffer::operator=(CordBuffer&& rhs) noexcept {
+  if (!rep_.is_short()) cord_internal::CordRepFlat::Delete(rep_.rep());
+  rep_ = rhs.rep_;
+  rhs.rep_.set_short_length(0);
+  return *this;
+}
+
+inline absl::Span<char> CordBuffer::available() {
+  return rep_.is_short() ? rep_.short_available() : rep_.long_available();
+}
+
+inline absl::Span<char> CordBuffer::available_up_to(size_t size) {
+  return available().subspan(0, size);
+}
+
+inline char* CordBuffer::data() {
+  return rep_.is_short() ? rep_.data() : rep_.rep()->Data();
+}
+
+inline const char* CordBuffer::data() const {
+  return rep_.is_short() ? rep_.data() : rep_.rep()->Data();
+}
+
+inline size_t CordBuffer::capacity() const {
+  return rep_.is_short() ? Rep::kInlineCapacity : rep_.rep()->Capacity();
+}
+
+inline size_t CordBuffer::length() const {
+  return rep_.is_short() ? rep_.short_length() : rep_.rep()->length;
+}
+
+inline void CordBuffer::SetLength(size_t length) {
+  ABSL_HARDENING_ASSERT(length <= capacity());
+  if (rep_.is_short()) {
+    rep_.set_short_length(length);
+  } else {
+    rep_.rep()->length = length;
+  }
+}
+
+inline void CordBuffer::IncreaseLengthBy(size_t n) {
+  ABSL_HARDENING_ASSERT(n <= capacity() && length() + n <= capacity());
+  if (rep_.is_short()) {
+    rep_.add_short_length(n);
+  } else {
+    rep_.rep()->length += n;
+  }
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_CORD_BUFFER_H_
diff --git a/third_party/abseil-cpp/absl/strings/cord_buffer_test.cc b/third_party/abseil-cpp/absl/strings/cord_buffer_test.cc
new file mode 100644
index 0000000000..5c7437aece
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/cord_buffer_test.cc
@@ -0,0 +1,320 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/cord_buffer.h"
+
+
+#include <algorithm>
+#include <climits>
+#include <cstring>
+#include <string>
+#include <utility>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/strings/internal/cord_rep_flat.h"
+#include "absl/strings/internal/cord_rep_test_util.h"
+#include "absl/types/span.h"
+
+using testing::Eq;
+using testing::Ge;
+using testing::Le;
+using testing::Ne;
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+class CordBufferTestPeer {
+ public:
+  static cord_internal::CordRep* ConsumeValue(CordBuffer& buffer,
+                                              absl::string_view& short_value) {
+    return buffer.ConsumeValue(short_value);
+  }
+};
+
+namespace {
+
+using ::absl::cordrep_testing::CordToString;
+
+constexpr size_t kInlinedSize = sizeof(CordBuffer) - 1;
+constexpr size_t kDefaultLimit = CordBuffer::kDefaultLimit;
+constexpr size_t kCustomLimit = CordBuffer::kCustomLimit;
+constexpr size_t kMaxFlatSize = cord_internal::kMaxFlatSize;
+constexpr size_t kMaxFlatLength = cord_internal::kMaxFlatLength;
+constexpr size_t kFlatOverhead = cord_internal::kFlatOverhead;
+
+constexpr size_t k8KiB = 8 << 10;
+constexpr size_t k16KiB = 16 << 10;
+constexpr size_t k64KiB = 64 << 10;
+constexpr size_t k1MB = 1 << 20;
+
+class CordBufferTest : public testing::TestWithParam<size_t> {};
+
+INSTANTIATE_TEST_SUITE_P(MediumSize, CordBufferTest,
+                         testing::Values(1, kInlinedSize - 1, kInlinedSize,
+                                         kInlinedSize + 1, kDefaultLimit - 1,
+                                         kDefaultLimit));
+
+TEST_P(CordBufferTest, MaximumPayload) {
+  EXPECT_THAT(CordBuffer::MaximumPayload(), Eq(kMaxFlatLength));
+  EXPECT_THAT(CordBuffer::MaximumPayload(512), Eq(512 - kFlatOverhead));
+  EXPECT_THAT(CordBuffer::MaximumPayload(k64KiB), Eq(k64KiB - kFlatOverhead));
+  EXPECT_THAT(CordBuffer::MaximumPayload(k1MB), Eq(k64KiB - kFlatOverhead));
+}
+
+TEST(CordBufferTest, ConstructDefault) {
+  CordBuffer buffer;
+  EXPECT_THAT(buffer.capacity(), Eq(sizeof(CordBuffer) - 1));
+  EXPECT_THAT(buffer.length(), Eq(0));
+  EXPECT_THAT(buffer.data(), Ne(nullptr));
+  EXPECT_THAT(buffer.available().data(), Eq(buffer.data()));
+  EXPECT_THAT(buffer.available().size(), Eq(buffer.capacity()));
+  memset(buffer.data(), 0xCD, buffer.capacity());
+}
+
+TEST(CordBufferTest, CreateSsoWithDefaultLimit) {
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(3);
+  EXPECT_THAT(buffer.capacity(), Ge(3));
+  EXPECT_THAT(buffer.capacity(), Le(sizeof(CordBuffer)));
+  EXPECT_THAT(buffer.length(), Eq(0));
+  memset(buffer.data(), 0xCD, buffer.capacity());
+
+  memcpy(buffer.data(), "Abc", 3);
+  buffer.SetLength(3);
+  EXPECT_THAT(buffer.length(), Eq(3));
+  absl::string_view short_value;
+  EXPECT_THAT(CordBufferTestPeer::ConsumeValue(buffer, short_value),
+              Eq(nullptr));
+  EXPECT_THAT(absl::string_view(buffer.data(), 3), Eq("Abc"));
+  EXPECT_THAT(short_value, Eq("Abc"));
+}
+
+TEST_P(CordBufferTest, Available) {
+  const size_t requested = GetParam();
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(requested);
+  EXPECT_THAT(buffer.available().data(), Eq(buffer.data()));
+  EXPECT_THAT(buffer.available().size(), Eq(buffer.capacity()));
+
+  buffer.SetLength(2);
+  EXPECT_THAT(buffer.available().data(), Eq(buffer.data() + 2));
+  EXPECT_THAT(buffer.available().size(), Eq(buffer.capacity() - 2));
+}
+
+TEST_P(CordBufferTest, IncreaseLengthBy) {
+  const size_t requested = GetParam();
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(requested);
+  buffer.IncreaseLengthBy(2);
+  EXPECT_THAT(buffer.length(), Eq(2));
+  buffer.IncreaseLengthBy(5);
+  EXPECT_THAT(buffer.length(), Eq(7));
+}
+
+TEST_P(CordBufferTest, AvailableUpTo) {
+  const size_t requested = GetParam();
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(requested);
+  size_t expected_up_to = std::min<size_t>(3, buffer.capacity());
+  EXPECT_THAT(buffer.available_up_to(3).data(), Eq(buffer.data()));
+  EXPECT_THAT(buffer.available_up_to(3).size(), Eq(expected_up_to));
+
+  buffer.SetLength(2);
+  expected_up_to = std::min<size_t>(3, buffer.capacity() - 2);
+  EXPECT_THAT(buffer.available_up_to(3).data(), Eq(buffer.data() + 2));
+  EXPECT_THAT(buffer.available_up_to(3).size(), Eq(expected_up_to));
+}
+
+// Returns the maximum capacity for a given block_size and requested size.
+size_t MaxCapacityFor(size_t block_size, size_t requested) {
+  requested = (std::min)(requested, cord_internal::kMaxLargeFlatSize);
+  // Maximum returned size is always capped at block_size - kFlatOverhead.
+  return block_size - kFlatOverhead;
+}
+
+TEST_P(CordBufferTest, CreateWithDefaultLimit) {
+  const size_t requested = GetParam();
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(requested);
+  EXPECT_THAT(buffer.capacity(), Ge(requested));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(kMaxFlatSize, requested)));
+  EXPECT_THAT(buffer.length(), Eq(0));
+
+  memset(buffer.data(), 0xCD, buffer.capacity());
+
+  std::string data(requested - 1, 'x');
+  memcpy(buffer.data(), data.c_str(), requested);
+  buffer.SetLength(requested);
+
+  EXPECT_THAT(buffer.length(), Eq(requested));
+  EXPECT_THAT(absl::string_view(buffer.data()), Eq(data));
+}
+
+TEST(CordBufferTest, CreateWithDefaultLimitAskingFor2GB) {
+  constexpr size_t k2GiB = 1U << 31;
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(k2GiB);
+  // Expect to never be awarded more than a reasonable memory size, even in
+  // cases where a (debug) memory allocator may grant us somewhat more memory
+  // than `kDefaultLimit` which should be no more than `2 * kDefaultLimit`
+  EXPECT_THAT(buffer.capacity(), Le(2 * CordBuffer::kDefaultLimit));
+  EXPECT_THAT(buffer.length(), Eq(0));
+  EXPECT_THAT(buffer.data(), Ne(nullptr));
+  memset(buffer.data(), 0xCD, buffer.capacity());
+}
+
+TEST_P(CordBufferTest, MoveConstruct) {
+  const size_t requested = GetParam();
+  CordBuffer from = CordBuffer::CreateWithDefaultLimit(requested);
+  const size_t capacity = from.capacity();
+  memcpy(from.data(), "Abc", 4);
+  from.SetLength(4);
+
+  CordBuffer to(std::move(from));
+  EXPECT_THAT(to.capacity(), Eq(capacity));
+  EXPECT_THAT(to.length(), Eq(4));
+  EXPECT_THAT(absl::string_view(to.data()), Eq("Abc"));
+
+  EXPECT_THAT(from.length(), Eq(0));  // NOLINT
+}
+
+TEST_P(CordBufferTest, MoveAssign) {
+  const size_t requested = GetParam();
+  CordBuffer from = CordBuffer::CreateWithDefaultLimit(requested);
+  const size_t capacity = from.capacity();
+  memcpy(from.data(), "Abc", 4);
+  from.SetLength(4);
+
+  CordBuffer to;
+  to = std::move(from);
+  EXPECT_THAT(to.capacity(), Eq(capacity));
+  EXPECT_THAT(to.length(), Eq(4));
+  EXPECT_THAT(absl::string_view(to.data()), Eq("Abc"));
+
+  EXPECT_THAT(from.length(), Eq(0));  // NOLINT
+}
+
+TEST_P(CordBufferTest, ConsumeValue) {
+  const size_t requested = GetParam();
+  CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(requested);
+  memcpy(buffer.data(), "Abc", 4);
+  buffer.SetLength(3);
+
+  absl::string_view short_value;
+  if (cord_internal::CordRep* rep =
+          CordBufferTestPeer::ConsumeValue(buffer, short_value)) {
+    EXPECT_THAT(CordToString(rep), Eq("Abc"));
+    cord_internal::CordRep::Unref(rep);
+  } else {
+    EXPECT_THAT(short_value, Eq("Abc"));
+  }
+  EXPECT_THAT(buffer.length(), Eq(0));
+}
+
+TEST_P(CordBufferTest, CreateWithCustomLimitWithinDefaultLimit) {
+  const size_t requested = GetParam();
+  CordBuffer buffer =
+      CordBuffer::CreateWithCustomLimit(kMaxFlatSize, requested);
+  EXPECT_THAT(buffer.capacity(), Ge(requested));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(kMaxFlatSize, requested)));
+  EXPECT_THAT(buffer.length(), Eq(0));
+
+  memset(buffer.data(), 0xCD, buffer.capacity());
+
+  std::string data(requested - 1, 'x');
+  memcpy(buffer.data(), data.c_str(), requested);
+  buffer.SetLength(requested);
+
+  EXPECT_THAT(buffer.length(), Eq(requested));
+  EXPECT_THAT(absl::string_view(buffer.data()), Eq(data));
+}
+
+TEST(CordLargeBufferTest, CreateAtOrBelowDefaultLimit) {
+  CordBuffer buffer = CordBuffer::CreateWithCustomLimit(k64KiB, kDefaultLimit);
+  EXPECT_THAT(buffer.capacity(), Ge(kDefaultLimit));
+  EXPECT_THAT(buffer.capacity(),
+              Le(MaxCapacityFor(kMaxFlatSize, kDefaultLimit)));
+
+  buffer = CordBuffer::CreateWithCustomLimit(k64KiB, 3178);
+  EXPECT_THAT(buffer.capacity(), Ge(3178));
+}
+
+TEST(CordLargeBufferTest, CreateWithCustomLimit) {
+  ASSERT_THAT((kMaxFlatSize & (kMaxFlatSize - 1)) == 0, "Must be power of 2");
+
+  for (size_t size = kMaxFlatSize; size <= kCustomLimit; size *= 2) {
+    CordBuffer buffer = CordBuffer::CreateWithCustomLimit(size, size);
+    size_t expected = size - kFlatOverhead;
+    ASSERT_THAT(buffer.capacity(), Ge(expected));
+    EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(size, expected)));
+  }
+}
+
+TEST(CordLargeBufferTest, CreateWithTooLargeLimit) {
+  CordBuffer buffer = CordBuffer::CreateWithCustomLimit(k64KiB, k1MB);
+  ASSERT_THAT(buffer.capacity(), Ge(k64KiB - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(k64KiB, k1MB)));
+}
+
+TEST(CordLargeBufferTest, CreateWithHugeValueForOverFlowHardening) {
+  for (size_t dist_from_max = 0; dist_from_max <= 32; ++dist_from_max) {
+    size_t capacity = std::numeric_limits<size_t>::max() - dist_from_max;
+
+    CordBuffer buffer = CordBuffer::CreateWithDefaultLimit(capacity);
+    ASSERT_THAT(buffer.capacity(), Ge(kDefaultLimit));
+    EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(kMaxFlatSize, capacity)));
+
+    for (size_t limit = kMaxFlatSize; limit <= kCustomLimit; limit *= 2) {
+      CordBuffer buffer = CordBuffer::CreateWithCustomLimit(limit, capacity);
+      ASSERT_THAT(buffer.capacity(), Ge(limit - kFlatOverhead));
+      EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(limit, capacity)));
+    }
+  }
+}
+
+TEST(CordLargeBufferTest, CreateWithSmallLimit) {
+  CordBuffer buffer = CordBuffer::CreateWithCustomLimit(512, 1024);
+  ASSERT_THAT(buffer.capacity(), Ge(512 - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(512, 1024)));
+
+  // Ask for precise block size, should return size - kOverhead
+  buffer = CordBuffer::CreateWithCustomLimit(512, 512);
+  ASSERT_THAT(buffer.capacity(), Ge(512 - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(512, 512)));
+
+  // Corner case: 511 < block_size, but 511 + kOverhead is above
+  buffer = CordBuffer::CreateWithCustomLimit(512, 511);
+  ASSERT_THAT(buffer.capacity(), Ge(512 - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(512, 511)));
+
+  // Corner case: 498 + kOverhead < block_size
+  buffer = CordBuffer::CreateWithCustomLimit(512, 498);
+  ASSERT_THAT(buffer.capacity(), Ge(512 - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(512, 498)));
+}
+
+TEST(CordLargeBufferTest, CreateWasteFull) {
+  // 15 KiB gets rounded down to next pow2 value.
+  const size_t requested = (15 << 10);
+  CordBuffer buffer = CordBuffer::CreateWithCustomLimit(k16KiB, requested);
+  ASSERT_THAT(buffer.capacity(), Ge(k8KiB - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(k8KiB, requested)));
+}
+
+TEST(CordLargeBufferTest, CreateSmallSlop) {
+  const size_t requested = k16KiB - 2 * kFlatOverhead;
+  CordBuffer buffer = CordBuffer::CreateWithCustomLimit(k16KiB, requested);
+  ASSERT_THAT(buffer.capacity(), Ge(k16KiB - kFlatOverhead));
+  EXPECT_THAT(buffer.capacity(), Le(MaxCapacityFor(k16KiB, requested)));
+}
+
+}  // namespace
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/cord_ring_reader_test.cc b/third_party/abseil-cpp/absl/strings/cord_ring_reader_test.cc
index d9a9a76d1e..8e7183bff0 100644
--- a/third_party/abseil-cpp/absl/strings/cord_ring_reader_test.cc
+++ b/third_party/abseil-cpp/absl/strings/cord_ring_reader_test.cc
@@ -126,7 +126,7 @@ TEST(CordRingReaderTest, SeekForward) {
 
   reader.Reset(ring);
   size_t consumed = 0;
-  size_t remaining = ring->length;;
+  size_t remaining = ring->length;
   for (int i = 0; i < flats.size(); ++i) {
     CordRepRing::index_type index = ring->advance(head, i);
     size_t offset = consumed;
diff --git a/third_party/abseil-cpp/absl/strings/cord_ring_test.cc b/third_party/abseil-cpp/absl/strings/cord_ring_test.cc
index f131859532..f39a0a4f8d 100644
--- a/third_party/abseil-cpp/absl/strings/cord_ring_test.cc
+++ b/third_party/abseil-cpp/absl/strings/cord_ring_test.cc
@@ -44,7 +44,6 @@ using ::absl::cord_internal::CordRepFlat;
 using ::absl::cord_internal::CordRepRing;
 using ::absl::cord_internal::CordRepSubstring;
 
-using ::absl::cord_internal::CONCAT;
 using ::absl::cord_internal::EXTERNAL;
 using ::absl::cord_internal::SUBSTRING;
 
@@ -262,16 +261,6 @@ CordRepSubstring* RemoveSuffix(size_t length, CordRep* rep) {
   return MakeSubstring(0, rep->length - length, rep);
 }
 
-CordRepConcat* MakeConcat(CordRep* left, CordRep* right, int depth = 0) {
-  auto* concat = new CordRepConcat;
-  concat->tag = CONCAT;
-  concat->length = left->length + right->length;
-  concat->left = left;
-  concat->right = right;
-  concat->set_depth(depth);
-  return concat;
-}
-
 enum Composition { kMix, kAppend, kPrepend };
 
 Composition RandomComposition() {
@@ -296,7 +285,6 @@ constexpr const char* kFox = "The quick brown fox jumps over the lazy dog";
 constexpr const char* kFoxFlats[] = {"The ", "quick ", "brown ",
                                      "fox ", "jumps ", "over ",
                                      "the ", "lazy ",  "dog"};
-constexpr const char* kAlphabet = "abcdefghijklmnopqrstuvwxyz";
 
 CordRepRing* FromFlats(Span<const char* const> flats,
                        Composition composition = kAppend) {
@@ -594,35 +582,6 @@ TEST_P(CordRingCreateFromTreeTest, CreateFromSubstringOfLargeExternal) {
   EXPECT_THAT(ToRawFlats(result), ElementsAre(str));
 }
 
-TEST_P(CordRingBuildInputTest, CreateFromConcat) {
-  CordRep* flats[] = {MakeFlat("abcdefgh"), MakeFlat("ijklm"),
-                      MakeFlat("nopqrstuv"), MakeFlat("wxyz")};
-  auto* left = MakeConcat(RefIfInputSharedIndirect(flats[0]), flats[1]);
-  auto* right = MakeConcat(flats[2], RefIfInputSharedIndirect(flats[3]));
-  auto* concat = RefIfInputShared(MakeConcat(left, right));
-  CordRepRing* result = NeedsUnref(CordRepRing::Create(concat));
-  ASSERT_THAT(result, IsValidRingBuffer());
-  EXPECT_THAT(result->length, Eq(26));
-  EXPECT_THAT(ToString(result), Eq(kAlphabet));
-}
-
-TEST_P(CordRingBuildInputTest, CreateFromSubstringConcat) {
-  for (size_t off = 0; off < 26; ++off) {
-    for (size_t len = 1; len < 26 - off; ++len) {
-      CordRep* flats[] = {MakeFlat("abcdefgh"), MakeFlat("ijklm"),
-                          MakeFlat("nopqrstuv"), MakeFlat("wxyz")};
-      auto* left = MakeConcat(RefIfInputSharedIndirect(flats[0]), flats[1]);
-      auto* right = MakeConcat(flats[2], RefIfInputSharedIndirect(flats[3]));
-      auto* concat = MakeConcat(left, right);
-      auto* child = RefIfInputShared(MakeSubstring(off, len, concat));
-      CordRepRing* result = NeedsUnref(CordRepRing::Create(child));
-      ASSERT_THAT(result, IsValidRingBuffer());
-      ASSERT_THAT(result->length, Eq(len));
-      ASSERT_THAT(ToString(result), string_view(kAlphabet).substr(off, len));
-    }
-  }
-}
-
 TEST_P(CordRingCreateTest, Properties) {
   absl::string_view str1 = "abcdefghijklmnopqrstuvwxyz";
   CordRepRing* result = NeedsUnref(CordRepRing::Create(MakeFlat(str1), 120));
diff --git a/third_party/abseil-cpp/absl/strings/cord_test.cc b/third_party/abseil-cpp/absl/strings/cord_test.cc
index cced9bba39..a4fa8955d3 100644
--- a/third_party/abseil-cpp/absl/strings/cord_test.cc
+++ b/third_party/abseil-cpp/absl/strings/cord_test.cc
@@ -28,21 +28,37 @@
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
-#include "absl/base/casts.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/endian.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/base/macros.h"
 #include "absl/container/fixed_array.h"
+#include "absl/hash/hash.h"
 #include "absl/random/random.h"
 #include "absl/strings/cord_test_helpers.h"
 #include "absl/strings/cordz_test_helpers.h"
+#include "absl/strings/match.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_format.h"
 #include "absl/strings/string_view.h"
 
+// convenience local constants
+static constexpr auto FLAT = absl::cord_internal::FLAT;
+static constexpr auto MAX_FLAT_TAG = absl::cord_internal::MAX_FLAT_TAG;
+
 typedef std::mt19937_64 RandomEngine;
 
+using absl::cord_internal::CordRep;
+using absl::cord_internal::CordRepBtree;
+using absl::cord_internal::CordRepConcat;
+using absl::cord_internal::CordRepCrc;
+using absl::cord_internal::CordRepExternal;
+using absl::cord_internal::CordRepFlat;
+using absl::cord_internal::CordRepSubstring;
+using absl::cord_internal::CordzUpdateTracker;
+using absl::cord_internal::kFlatOverhead;
+using absl::cord_internal::kMaxFlatLength;
+
 static std::string RandomLowercaseString(RandomEngine* rng);
 static std::string RandomLowercaseString(RandomEngine* rng, size_t length);
 
@@ -185,6 +201,7 @@ class CordTestPeer {
   }
 
   static bool IsTree(const Cord& c) { return c.contents_.is_tree(); }
+  static CordRep* Tree(const Cord& c) { return c.contents_.tree(); }
 
   static cord_internal::CordzInfo* GetCordzInfo(const Cord& c) {
     return c.contents_.cordz_info();
@@ -192,14 +209,12 @@ class CordTestPeer {
 
   static Cord MakeSubstring(Cord src, size_t offset, size_t length) {
     ABSL_RAW_CHECK(src.contents_.is_tree(), "Can not be inlined");
+    ABSL_RAW_CHECK(src.ExpectedChecksum() == absl::nullopt,
+                   "Can not be hardened");
     Cord cord;
-    auto* rep = new cord_internal::CordRepSubstring;
-    rep->tag = cord_internal::SUBSTRING;
-    rep->child = cord_internal::CordRep::Ref(src.contents_.tree());
-    rep->start = offset;
-    rep->length = length;
-    cord.contents_.EmplaceTree(rep,
-                               cord_internal::CordzUpdateTracker::kSubCord);
+    auto* tree = cord_internal::SkipCrcNode(src.contents_.tree());
+    auto* rep = CordRepSubstring::Create(CordRep::Ref(tree), offset, length);
+    cord.contents_.EmplaceTree(rep, CordzUpdateTracker::kSubCord);
     return cord;
   }
 };
@@ -207,31 +222,107 @@ class CordTestPeer {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-// The CordTest fixture runs all tests with and without Cord Btree enabled.
-class CordTest : public testing::TestWithParam<bool> {
+// The CordTest fixture runs all tests with and without Cord Btree enabled,
+// and with our without expected CRCs being set on the subject Cords.
+class CordTest : public testing::TestWithParam<int> {
  public:
-  CordTest() : was_btree_(absl::cord_internal::cord_btree_enabled.load()) {
-    absl::cord_internal::cord_btree_enabled.store(UseBtree());
+  // Returns true if test is running with btree enabled.
+  bool UseCrc() const { return GetParam() == 2 || GetParam() == 3; }
+  void MaybeHarden(absl::Cord& c) {
+    if (UseCrc()) {
+      c.SetExpectedChecksum(1);
+    }
   }
-  ~CordTest() override {
-    absl::cord_internal::cord_btree_enabled.store(was_btree_);
+  absl::Cord MaybeHardened(absl::Cord c) {
+    MaybeHarden(c);
+    return c;
   }
 
-  // Returns true if test is running with btree enabled.
-  bool UseBtree() const { return GetParam(); }
-
   // Returns human readable string representation of the test parameter.
-  static std::string ToString(testing::TestParamInfo<bool> param) {
-    return param.param ? "Btree" : "Concat";
+  static std::string ToString(testing::TestParamInfo<int> param) {
+    switch (param.param) {
+      case 0:
+        return "Btree";
+      case 1:
+        return "BtreeHardened";
+      default:
+        assert(false);
+        return "???";
+    }
   }
-
- private:
-  const bool was_btree_;
 };
 
-INSTANTIATE_TEST_SUITE_P(WithParam, CordTest, testing::Bool(),
+INSTANTIATE_TEST_SUITE_P(WithParam, CordTest, testing::Values(0, 1),
                          CordTest::ToString);
 
+TEST(CordRepFlat, AllFlatCapacities) {
+  // Explicitly and redundantly assert built-in min/max limits
+  static_assert(absl::cord_internal::kFlatOverhead < 32, "");
+  static_assert(absl::cord_internal::kMinFlatSize == 32, "");
+  static_assert(absl::cord_internal::kMaxLargeFlatSize == 256 << 10, "");
+  EXPECT_EQ(absl::cord_internal::TagToAllocatedSize(FLAT), 32);
+  EXPECT_EQ(absl::cord_internal::TagToAllocatedSize(MAX_FLAT_TAG), 256 << 10);
+
+  // Verify all tags to map perfectly back and forth, and
+  // that sizes are monotonically increasing.
+  size_t last_size = 0;
+  for (int tag = FLAT; tag <= MAX_FLAT_TAG; ++tag) {
+    size_t size = absl::cord_internal::TagToAllocatedSize(tag);
+    ASSERT_GT(size, last_size);
+    ASSERT_EQ(absl::cord_internal::TagToAllocatedSize(tag), size);
+    last_size = size;
+  }
+
+  // All flat size from 32 - 512 are 8 byte granularity
+  for (size_t size = 32; size <= 512; size += 8) {
+    ASSERT_EQ(absl::cord_internal::RoundUpForTag(size), size);
+    uint8_t tag = absl::cord_internal::AllocatedSizeToTag(size);
+    ASSERT_EQ(absl::cord_internal::TagToAllocatedSize(tag), size);
+  }
+
+  // All flat sizes from 512 - 8192 are 64 byte granularity
+  for (size_t size = 512; size <= 8192; size += 64) {
+    ASSERT_EQ(absl::cord_internal::RoundUpForTag(size), size);
+    uint8_t tag = absl::cord_internal::AllocatedSizeToTag(size);
+    ASSERT_EQ(absl::cord_internal::TagToAllocatedSize(tag), size);
+  }
+
+  // All flat sizes from 8KB to 256KB are 4KB granularity
+  for (size_t size = 8192; size <= 256 * 1024; size += 4 * 1024) {
+    ASSERT_EQ(absl::cord_internal::RoundUpForTag(size), size);
+    uint8_t tag = absl::cord_internal::AllocatedSizeToTag(size);
+    ASSERT_EQ(absl::cord_internal::TagToAllocatedSize(tag), size);
+  }
+}
+
+TEST(CordRepFlat, MaxFlatSize) {
+  CordRepFlat* flat = CordRepFlat::New(kMaxFlatLength);
+  EXPECT_EQ(flat->Capacity(), kMaxFlatLength);
+  CordRep::Unref(flat);
+
+  flat = CordRepFlat::New(kMaxFlatLength * 4);
+  EXPECT_EQ(flat->Capacity(), kMaxFlatLength);
+  CordRep::Unref(flat);
+}
+
+TEST(CordRepFlat, MaxLargeFlatSize) {
+  const size_t size = 256 * 1024 - kFlatOverhead;
+  CordRepFlat* flat = CordRepFlat::New(CordRepFlat::Large(), size);
+  EXPECT_GE(flat->Capacity(), size);
+  CordRep::Unref(flat);
+}
+
+TEST(CordRepFlat, AllFlatSizes) {
+  const size_t kMaxSize = 256 * 1024;
+  for (size_t size = 32; size <= kMaxSize; size *=2) {
+    const size_t length = size - kFlatOverhead - 1;
+    CordRepFlat* flat = CordRepFlat::New(CordRepFlat::Large(), length);
+    EXPECT_GE(flat->Capacity(), length);
+    memset(flat->Data(), 0xCD, flat->Capacity());
+    CordRep::Unref(flat);
+  }
+}
+
 TEST_P(CordTest, AllFlatSizes) {
   using absl::strings_internal::CordTestAccess;
 
@@ -243,6 +334,7 @@ TEST_P(CordTest, AllFlatSizes) {
     }
 
     absl::Cord dst(src);
+    MaybeHarden(dst);
     EXPECT_EQ(std::string(dst), src) << s;
   }
 }
@@ -274,6 +366,7 @@ TEST_P(CordTest, GigabyteCordFromExternal) {
     c.Append(from);
     c.Append(from);
     c.Append(from);
+    MaybeHarden(c);
   }
 
   for (int i = 0; i < 1024; ++i) {
@@ -302,6 +395,8 @@ bool my_unique_true_boolean = true;
 TEST_P(CordTest, Assignment) {
   absl::Cord x(absl::string_view("hi there"));
   absl::Cord y(x);
+  MaybeHarden(y);
+  ASSERT_EQ(x.ExpectedChecksum(), absl::nullopt);
   ASSERT_EQ(std::string(x), "hi there");
   ASSERT_EQ(std::string(y), "hi there");
   ASSERT_TRUE(x == y);
@@ -355,6 +450,7 @@ TEST_P(CordTest, Assignment) {
 
 TEST_P(CordTest, StartsEndsWith) {
   absl::Cord x(absl::string_view("abcde"));
+  MaybeHarden(x);
   absl::Cord empty("");
 
   ASSERT_TRUE(x.StartsWith(absl::Cord("abcde")));
@@ -392,6 +488,7 @@ TEST_P(CordTest, Subcord) {
 
   absl::Cord a;
   AppendWithFragments(s, &rng, &a);
+  MaybeHarden(a);
   ASSERT_EQ(s, std::string(a));
 
   // Check subcords of a, from a variety of interesting points.
@@ -413,6 +510,9 @@ TEST_P(CordTest, Subcord) {
       ASSERT_EQ(absl::string_view(s).substr(pos, end_pos - pos),
                 std::string(sa))
           << a;
+      if (pos != 0 || end_pos != a.size()) {
+        ASSERT_EQ(sa.ExpectedChecksum(), absl::nullopt);
+      }
     }
   }
 
@@ -452,10 +552,19 @@ TEST_P(CordTest, Swap) {
   absl::string_view b("Mandark");
   absl::Cord x(a);
   absl::Cord y(b);
+  MaybeHarden(x);
   swap(x, y);
+  if (UseCrc()) {
+    ASSERT_EQ(x.ExpectedChecksum(), absl::nullopt);
+    ASSERT_EQ(y.ExpectedChecksum(), 1);
+  }
   ASSERT_EQ(x, absl::Cord(b));
   ASSERT_EQ(y, absl::Cord(a));
   x.swap(y);
+  if (UseCrc()) {
+    ASSERT_EQ(x.ExpectedChecksum(), 1);
+    ASSERT_EQ(y.ExpectedChecksum(), absl::nullopt);
+  }
   ASSERT_EQ(x, absl::Cord(a));
   ASSERT_EQ(y, absl::Cord(b));
 }
@@ -480,11 +589,320 @@ static void VerifyCopyToString(const absl::Cord& cord) {
 }
 
 TEST_P(CordTest, CopyToString) {
-  VerifyCopyToString(absl::Cord());
-  VerifyCopyToString(absl::Cord("small cord"));
-  VerifyCopyToString(
+  VerifyCopyToString(absl::Cord());  // empty cords cannot carry CRCs
+  VerifyCopyToString(MaybeHardened(absl::Cord("small cord")));
+  VerifyCopyToString(MaybeHardened(
       absl::MakeFragmentedCord({"fragmented ", "cord ", "to ", "test ",
-                                "copying ", "to ", "a ", "string."}));
+                                "copying ", "to ", "a ", "string."})));
+}
+
+TEST_P(CordTest, AppendEmptyBuffer) {
+  absl::Cord cord;
+  cord.Append(absl::CordBuffer());
+  cord.Append(absl::CordBuffer::CreateWithDefaultLimit(2000));
+}
+
+TEST_P(CordTest, AppendEmptyBufferToFlat) {
+  absl::Cord cord(std::string(2000, 'x'));
+  cord.Append(absl::CordBuffer());
+  cord.Append(absl::CordBuffer::CreateWithDefaultLimit(2000));
+}
+
+TEST_P(CordTest, AppendEmptyBufferToTree) {
+  absl::Cord cord(std::string(2000, 'x'));
+  cord.Append(std::string(2000, 'y'));
+  cord.Append(absl::CordBuffer());
+  cord.Append(absl::CordBuffer::CreateWithDefaultLimit(2000));
+}
+
+TEST_P(CordTest, AppendSmallBuffer) {
+  absl::Cord cord;
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(3);
+  ASSERT_THAT(buffer.capacity(), ::testing::Le(15));
+  memcpy(buffer.data(), "Abc", 3);
+  buffer.SetLength(3);
+  cord.Append(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  buffer = absl::CordBuffer::CreateWithDefaultLimit(3);
+  memcpy(buffer.data(), "defgh", 5);
+  buffer.SetLength(5);
+  cord.Append(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  EXPECT_THAT(cord.Chunks(), ::testing::ElementsAre("Abcdefgh"));
+}
+
+TEST_P(CordTest, AppendAndPrependBufferArePrecise) {
+  // Create a cord large enough to force 40KB flats.
+  std::string test_data(absl::cord_internal::kMaxFlatLength * 10, 'x');
+  absl::Cord cord1(test_data);
+  absl::Cord cord2(test_data);
+  const size_t size1 = cord1.EstimatedMemoryUsage();
+  const size_t size2 = cord2.EstimatedMemoryUsage();
+
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(3);
+  memcpy(buffer.data(), "Abc", 3);
+  buffer.SetLength(3);
+  cord1.Append(std::move(buffer));
+
+  buffer = absl::CordBuffer::CreateWithDefaultLimit(3);
+  memcpy(buffer.data(), "Abc", 3);
+  buffer.SetLength(3);
+  cord2.Prepend(std::move(buffer));
+
+#ifndef NDEBUG
+  // Allow 32 bytes new CordRepFlat, and 128 bytes for 'glue nodes'
+  constexpr size_t kMaxDelta = 128 + 32;
+#else
+  // Allow 256 bytes extra for 'allocation debug overhead'
+  constexpr size_t kMaxDelta = 128 + 32 + 256;
+#endif
+
+  EXPECT_LE(cord1.EstimatedMemoryUsage() - size1, kMaxDelta);
+  EXPECT_LE(cord2.EstimatedMemoryUsage() - size2, kMaxDelta);
+
+  EXPECT_EQ(cord1, absl::StrCat(test_data, "Abc"));
+  EXPECT_EQ(cord2, absl::StrCat("Abc", test_data));
+}
+
+TEST_P(CordTest, PrependSmallBuffer) {
+  absl::Cord cord;
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(3);
+  ASSERT_THAT(buffer.capacity(), ::testing::Le(15));
+  memcpy(buffer.data(), "Abc", 3);
+  buffer.SetLength(3);
+  cord.Prepend(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  buffer = absl::CordBuffer::CreateWithDefaultLimit(3);
+  memcpy(buffer.data(), "defgh", 5);
+  buffer.SetLength(5);
+  cord.Prepend(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  EXPECT_THAT(cord.Chunks(), ::testing::ElementsAre("defghAbc"));
+}
+
+TEST_P(CordTest, AppendLargeBuffer) {
+  absl::Cord cord;
+
+  std::string s1(700, '1');
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(s1.size());
+  memcpy(buffer.data(), s1.data(), s1.size());
+  buffer.SetLength(s1.size());
+  cord.Append(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  std::string s2(1000, '2');
+  buffer = absl::CordBuffer::CreateWithDefaultLimit(s2.size());
+  memcpy(buffer.data(), s2.data(), s2.size());
+  buffer.SetLength(s2.size());
+  cord.Append(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  EXPECT_THAT(cord.Chunks(), ::testing::ElementsAre(s1, s2));
+}
+
+TEST_P(CordTest, PrependLargeBuffer) {
+  absl::Cord cord;
+
+  std::string s1(700, '1');
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(s1.size());
+  memcpy(buffer.data(), s1.data(), s1.size());
+  buffer.SetLength(s1.size());
+  cord.Prepend(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  std::string s2(1000, '2');
+  buffer = absl::CordBuffer::CreateWithDefaultLimit(s2.size());
+  memcpy(buffer.data(), s2.data(), s2.size());
+  buffer.SetLength(s2.size());
+  cord.Prepend(std::move(buffer));
+  EXPECT_EQ(buffer.length(), 0);    // NOLINT
+  EXPECT_GT(buffer.capacity(), 0);  // NOLINT
+
+  EXPECT_THAT(cord.Chunks(), ::testing::ElementsAre(s2, s1));
+}
+
+class CordAppendBufferTest : public testing::TestWithParam<bool> {
+ public:
+  size_t is_default() const { return GetParam(); }
+
+  // Returns human readable string representation of the test parameter.
+  static std::string ToString(testing::TestParamInfo<bool> param) {
+    return param.param ? "DefaultLimit" : "CustomLimit";
+  }
+
+  size_t limit() const {
+    return is_default() ? absl::CordBuffer::kDefaultLimit
+                        : absl::CordBuffer::kCustomLimit;
+  }
+
+  size_t maximum_payload() const {
+    return is_default() ? absl::CordBuffer::MaximumPayload()
+                        : absl::CordBuffer::MaximumPayload(limit());
+  }
+
+  absl::CordBuffer GetAppendBuffer(absl::Cord& cord, size_t capacity,
+                                   size_t min_capacity = 16) {
+    return is_default()
+               ? cord.GetAppendBuffer(capacity, min_capacity)
+               : cord.GetCustomAppendBuffer(limit(), capacity, min_capacity);
+  }
+};
+
+INSTANTIATE_TEST_SUITE_P(WithParam, CordAppendBufferTest, testing::Bool(),
+                         CordAppendBufferTest::ToString);
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnEmptyCord) {
+  absl::Cord cord;
+  absl::CordBuffer buffer = GetAppendBuffer(cord, 1000);
+  EXPECT_GE(buffer.capacity(), 1000);
+  EXPECT_EQ(buffer.length(), 0);
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnInlinedCord) {
+  static constexpr int kInlinedSize = sizeof(absl::CordBuffer) - 1;
+  for (int size : {6, kInlinedSize - 3, kInlinedSize - 2, 1000}) {
+    absl::Cord cord("Abc");
+    absl::CordBuffer buffer = GetAppendBuffer(cord, size, 1);
+    EXPECT_GE(buffer.capacity(), 3 + size);
+    EXPECT_EQ(buffer.length(), 3);
+    EXPECT_EQ(absl::string_view(buffer.data(), buffer.length()), "Abc");
+    EXPECT_TRUE(cord.empty());
+  }
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnInlinedCordCapacityCloseToMax) {
+  // Cover the use case where we have a non empty inlined cord with some size
+  // 'n', and ask for something like 'uint64_max - k', assuming internal logic
+  // could overflow on 'uint64_max - k + size', and return a valid, but
+  // inefficiently smaller buffer if it would provide is the max allowed size.
+  for (size_t dist_from_max = 0; dist_from_max <= 4; ++dist_from_max) {
+    absl::Cord cord("Abc");
+    size_t size = std::numeric_limits<size_t>::max() - dist_from_max;
+    absl::CordBuffer buffer = GetAppendBuffer(cord, size, 1);
+    EXPECT_GE(buffer.capacity(), maximum_payload());
+    EXPECT_EQ(buffer.length(), 3);
+    EXPECT_EQ(absl::string_view(buffer.data(), buffer.length()), "Abc");
+    EXPECT_TRUE(cord.empty());
+  }
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnFlat) {
+  // Create a cord with a single flat and extra capacity
+  absl::Cord cord;
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+  const size_t expected_capacity = buffer.capacity();
+  buffer.SetLength(3);
+  memcpy(buffer.data(), "Abc", 3);
+  cord.Append(std::move(buffer));
+
+  buffer = GetAppendBuffer(cord, 6);
+  EXPECT_EQ(buffer.capacity(), expected_capacity);
+  EXPECT_EQ(buffer.length(), 3);
+  EXPECT_EQ(absl::string_view(buffer.data(), buffer.length()), "Abc");
+  EXPECT_TRUE(cord.empty());
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnFlatWithoutMinCapacity) {
+  // Create a cord with a single flat and extra capacity
+  absl::Cord cord;
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+  buffer.SetLength(30);
+  memset(buffer.data(), 'x', 30);
+  cord.Append(std::move(buffer));
+
+  buffer = GetAppendBuffer(cord, 1000, 900);
+  EXPECT_GE(buffer.capacity(), 1000);
+  EXPECT_EQ(buffer.length(), 0);
+  EXPECT_EQ(cord, std::string(30, 'x'));
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnTree) {
+  RandomEngine rng;
+  for (int num_flats : {2, 3, 100}) {
+    // Create a cord with `num_flats` flats and extra capacity
+    absl::Cord cord;
+    std::string prefix;
+    std::string last;
+    for (int i = 0; i < num_flats - 1; ++i) {
+      prefix += last;
+      last = RandomLowercaseString(&rng, 10);
+      absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+      buffer.SetLength(10);
+      memcpy(buffer.data(), last.data(), 10);
+      cord.Append(std::move(buffer));
+    }
+    absl::CordBuffer buffer = GetAppendBuffer(cord, 6);
+    EXPECT_GE(buffer.capacity(), 500);
+    EXPECT_EQ(buffer.length(), 10);
+    EXPECT_EQ(absl::string_view(buffer.data(), buffer.length()), last);
+    EXPECT_EQ(cord, prefix);
+  }
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnTreeWithoutMinCapacity) {
+  absl::Cord cord;
+  for (int i = 0; i < 2; ++i) {
+    absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+    buffer.SetLength(3);
+    memcpy(buffer.data(), i ? "def" : "Abc", 3);
+    cord.Append(std::move(buffer));
+  }
+  absl::CordBuffer buffer = GetAppendBuffer(cord, 1000, 900);
+  EXPECT_GE(buffer.capacity(), 1000);
+  EXPECT_EQ(buffer.length(), 0);
+  EXPECT_EQ(cord, "Abcdef");
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnSubstring) {
+  // Create a large cord with a single flat and some extra capacity
+  absl::Cord cord;
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+  buffer.SetLength(450);
+  memset(buffer.data(), 'x', 450);
+  cord.Append(std::move(buffer));
+  cord.RemovePrefix(1);
+
+  // Deny on substring
+  buffer = GetAppendBuffer(cord, 6);
+  EXPECT_EQ(buffer.length(), 0);
+  EXPECT_EQ(cord, std::string(449, 'x'));
+}
+
+TEST_P(CordAppendBufferTest, GetAppendBufferOnSharedCord) {
+  // Create a shared cord with a single flat and extra capacity
+  absl::Cord cord;
+  absl::CordBuffer buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+  buffer.SetLength(3);
+  memcpy(buffer.data(), "Abc", 3);
+  cord.Append(std::move(buffer));
+  absl::Cord shared_cord = cord;
+
+  // Deny on flat
+  buffer = GetAppendBuffer(cord, 6);
+  EXPECT_EQ(buffer.length(), 0);
+  EXPECT_EQ(cord, "Abc");
+
+  buffer = absl::CordBuffer::CreateWithDefaultLimit(500);
+  buffer.SetLength(3);
+  memcpy(buffer.data(), "def", 3);
+  cord.Append(std::move(buffer));
+  shared_cord = cord;
+
+  // Deny on tree
+  buffer = GetAppendBuffer(cord, 6);
+  EXPECT_EQ(buffer.length(), 0);
+  EXPECT_EQ(cord, "Abcdef");
 }
 
 TEST_P(CordTest, TryFlatEmpty) {
@@ -494,45 +912,43 @@ TEST_P(CordTest, TryFlatEmpty) {
 
 TEST_P(CordTest, TryFlatFlat) {
   absl::Cord c("hello");
+  MaybeHarden(c);
   EXPECT_EQ(c.TryFlat(), "hello");
 }
 
 TEST_P(CordTest, TryFlatSubstrInlined) {
   absl::Cord c("hello");
   c.RemovePrefix(1);
+  MaybeHarden(c);
   EXPECT_EQ(c.TryFlat(), "ello");
 }
 
 TEST_P(CordTest, TryFlatSubstrFlat) {
   absl::Cord c("longer than 15 bytes");
   absl::Cord sub = absl::CordTestPeer::MakeSubstring(c, 1, c.size() - 1);
+  MaybeHarden(sub);
   EXPECT_EQ(sub.TryFlat(), "onger than 15 bytes");
 }
 
 TEST_P(CordTest, TryFlatConcat) {
   absl::Cord c = absl::MakeFragmentedCord({"hel", "lo"});
+  MaybeHarden(c);
   EXPECT_EQ(c.TryFlat(), absl::nullopt);
 }
 
 TEST_P(CordTest, TryFlatExternal) {
   absl::Cord c = absl::MakeCordFromExternal("hell", [](absl::string_view) {});
+  MaybeHarden(c);
   EXPECT_EQ(c.TryFlat(), "hell");
 }
 
 TEST_P(CordTest, TryFlatSubstrExternal) {
   absl::Cord c = absl::MakeCordFromExternal("hell", [](absl::string_view) {});
   absl::Cord sub = absl::CordTestPeer::MakeSubstring(c, 1, c.size() - 1);
+  MaybeHarden(sub);
   EXPECT_EQ(sub.TryFlat(), "ell");
 }
 
-TEST_P(CordTest, TryFlatSubstrConcat) {
-  absl::Cord c = absl::MakeFragmentedCord({"hello", " world"});
-  absl::Cord sub = absl::CordTestPeer::MakeSubstring(c, 1, c.size() - 1);
-  EXPECT_EQ(sub.TryFlat(), absl::nullopt);
-  c.RemovePrefix(1);
-  EXPECT_EQ(c.TryFlat(), absl::nullopt);
-}
-
 TEST_P(CordTest, TryFlatCommonlyAssumedInvariants) {
   // The behavior tested below is not part of the API contract of Cord, but it's
   // something we intend to be true in our current implementation.  This test
@@ -547,6 +963,7 @@ TEST_P(CordTest, TryFlatCommonlyAssumedInvariants) {
                                    "returned by the ",
                                    "iterator"};
   absl::Cord c = absl::MakeFragmentedCord(fragments);
+  MaybeHarden(c);
   int fragment = 0;
   int offset = 0;
   absl::Cord::CharIterator itc = c.char_begin();
@@ -591,13 +1008,15 @@ static void VerifyFlatten(absl::Cord c) {
 
 TEST_P(CordTest, Flatten) {
   VerifyFlatten(absl::Cord());
-  VerifyFlatten(absl::Cord("small cord"));
-  VerifyFlatten(absl::Cord("larger than small buffer optimization"));
-  VerifyFlatten(absl::MakeFragmentedCord({"small ", "fragmented ", "cord"}));
+  VerifyFlatten(MaybeHardened(absl::Cord("small cord")));
+  VerifyFlatten(
+      MaybeHardened(absl::Cord("larger than small buffer optimization")));
+  VerifyFlatten(MaybeHardened(
+      absl::MakeFragmentedCord({"small ", "fragmented ", "cord"})));
 
   // Test with a cord that is longer than the largest flat buffer
   RandomEngine rng(GTEST_FLAG_GET(random_seed));
-  VerifyFlatten(absl::Cord(RandomLowercaseString(&rng, 8192)));
+  VerifyFlatten(MaybeHardened(absl::Cord(RandomLowercaseString(&rng, 8192))));
 }
 
 // Test data
@@ -651,22 +1070,26 @@ TEST_P(CordTest, MultipleLengths) {
     {  // Construct from Cord
       absl::Cord tmp(a);
       absl::Cord x(tmp);
+      MaybeHarden(x);
       EXPECT_EQ(a, std::string(x)) << "'" << a << "'";
     }
 
     {  // Construct from absl::string_view
       absl::Cord x(a);
+      MaybeHarden(x);
       EXPECT_EQ(a, std::string(x)) << "'" << a << "'";
     }
 
     {  // Append cord to self
       absl::Cord self(a);
+      MaybeHarden(self);
       self.Append(self);
       EXPECT_EQ(a + a, std::string(self)) << "'" << a << "' + '" << a << "'";
     }
 
     {  // Prepend cord to self
       absl::Cord self(a);
+      MaybeHarden(self);
       self.Prepend(self);
       EXPECT_EQ(a + a, std::string(self)) << "'" << a << "' + '" << a << "'";
     }
@@ -678,12 +1101,14 @@ TEST_P(CordTest, MultipleLengths) {
       {  // CopyFrom Cord
         absl::Cord x(a);
         absl::Cord y(b);
+        MaybeHarden(x);
         x = y;
         EXPECT_EQ(b, std::string(x)) << "'" << a << "' + '" << b << "'";
       }
 
       {  // CopyFrom absl::string_view
         absl::Cord x(a);
+        MaybeHarden(x);
         x = b;
         EXPECT_EQ(b, std::string(x)) << "'" << a << "' + '" << b << "'";
       }
@@ -691,12 +1116,14 @@ TEST_P(CordTest, MultipleLengths) {
       {  // Cord::Append(Cord)
         absl::Cord x(a);
         absl::Cord y(b);
+        MaybeHarden(x);
         x.Append(y);
         EXPECT_EQ(a + b, std::string(x)) << "'" << a << "' + '" << b << "'";
       }
 
       {  // Cord::Append(absl::string_view)
         absl::Cord x(a);
+        MaybeHarden(x);
         x.Append(b);
         EXPECT_EQ(a + b, std::string(x)) << "'" << a << "' + '" << b << "'";
       }
@@ -704,12 +1131,14 @@ TEST_P(CordTest, MultipleLengths) {
       {  // Cord::Prepend(Cord)
         absl::Cord x(a);
         absl::Cord y(b);
+        MaybeHarden(x);
         x.Prepend(y);
         EXPECT_EQ(b + a, std::string(x)) << "'" << b << "' + '" << a << "'";
       }
 
       {  // Cord::Prepend(absl::string_view)
         absl::Cord x(a);
+        MaybeHarden(x);
         x.Prepend(b);
         EXPECT_EQ(b + a, std::string(x)) << "'" << b << "' + '" << a << "'";
       }
@@ -722,13 +1151,16 @@ namespace {
 TEST_P(CordTest, RemoveSuffixWithExternalOrSubstring) {
   absl::Cord cord = absl::MakeCordFromExternal(
       "foo bar baz", [](absl::string_view s) { DoNothing(s, nullptr); });
-
   EXPECT_EQ("foo bar baz", std::string(cord));
 
+  MaybeHarden(cord);
+
   // This RemoveSuffix() will wrap the EXTERNAL node in a SUBSTRING node.
   cord.RemoveSuffix(4);
   EXPECT_EQ("foo bar", std::string(cord));
 
+  MaybeHarden(cord);
+
   // This RemoveSuffix() will adjust the SUBSTRING node in-place.
   cord.RemoveSuffix(4);
   EXPECT_EQ("foo", std::string(cord));
@@ -738,6 +1170,7 @@ TEST_P(CordTest, RemoveSuffixMakesZeroLengthNode) {
   absl::Cord c;
   c.Append(absl::Cord(std::string(100, 'x')));
   absl::Cord other_ref = c;  // Prevent inplace appends
+  MaybeHarden(c);
   c.Append(absl::Cord(std::string(200, 'y')));
   c.RemoveSuffix(200);
   EXPECT_EQ(std::string(100, 'x'), std::string(c));
@@ -763,6 +1196,7 @@ absl::Cord CordWithZedBlock(size_t size) {
 // Establish that ZedBlock does what we think it does.
 TEST_P(CordTest, CordSpliceTestZedBlock) {
   absl::Cord blob = CordWithZedBlock(10);
+  MaybeHarden(blob);
   EXPECT_EQ(10, blob.size());
   std::string s;
   absl::CopyCordToString(blob, &s);
@@ -771,6 +1205,7 @@ TEST_P(CordTest, CordSpliceTestZedBlock) {
 
 TEST_P(CordTest, CordSpliceTestZedBlock0) {
   absl::Cord blob = CordWithZedBlock(0);
+  MaybeHarden(blob);
   EXPECT_EQ(0, blob.size());
   std::string s;
   absl::CopyCordToString(blob, &s);
@@ -779,6 +1214,7 @@ TEST_P(CordTest, CordSpliceTestZedBlock0) {
 
 TEST_P(CordTest, CordSpliceTestZedBlockSuffix1) {
   absl::Cord blob = CordWithZedBlock(10);
+  MaybeHarden(blob);
   EXPECT_EQ(10, blob.size());
   absl::Cord suffix(blob);
   suffix.RemovePrefix(9);
@@ -791,6 +1227,7 @@ TEST_P(CordTest, CordSpliceTestZedBlockSuffix1) {
 // Remove all of a prefix block
 TEST_P(CordTest, CordSpliceTestZedBlockSuffix0) {
   absl::Cord blob = CordWithZedBlock(10);
+  MaybeHarden(blob);
   EXPECT_EQ(10, blob.size());
   absl::Cord suffix(blob);
   suffix.RemovePrefix(10);
@@ -823,6 +1260,7 @@ absl::Cord SpliceCord(const absl::Cord& blob, int64_t offset,
 // Taking an empty suffix of a block breaks appending.
 TEST_P(CordTest, CordSpliceTestRemoveEntireBlock1) {
   absl::Cord zero = CordWithZedBlock(10);
+  MaybeHarden(zero);
   absl::Cord suffix(zero);
   suffix.RemovePrefix(10);
   absl::Cord result;
@@ -831,6 +1269,7 @@ TEST_P(CordTest, CordSpliceTestRemoveEntireBlock1) {
 
 TEST_P(CordTest, CordSpliceTestRemoveEntireBlock2) {
   absl::Cord zero = CordWithZedBlock(10);
+  MaybeHarden(zero);
   absl::Cord prefix(zero);
   prefix.RemoveSuffix(10);
   absl::Cord suffix(zero);
@@ -842,13 +1281,19 @@ TEST_P(CordTest, CordSpliceTestRemoveEntireBlock2) {
 TEST_P(CordTest, CordSpliceTestRemoveEntireBlock3) {
   absl::Cord blob = CordWithZedBlock(10);
   absl::Cord block = BigCord(10, 'b');
+  MaybeHarden(blob);
+  MaybeHarden(block);
   blob = SpliceCord(blob, 0, block);
 }
 
 struct CordCompareTestCase {
   template <typename LHS, typename RHS>
-  CordCompareTestCase(const LHS& lhs, const RHS& rhs)
-      : lhs_cord(lhs), rhs_cord(rhs) {}
+  CordCompareTestCase(const LHS& lhs, const RHS& rhs, bool use_crc)
+      : lhs_cord(lhs), rhs_cord(rhs) {
+    if (use_crc) {
+      lhs_cord.SetExpectedChecksum(1);
+    }
+  }
 
   absl::Cord lhs_cord;
   absl::Cord rhs_cord;
@@ -885,47 +1330,54 @@ TEST_P(CordTest, Compare) {
   concat2.Append("cccccccccccDDDDDDDDDDDDDD");
   concat2.Append("DD");
 
+  const bool use_crc = UseCrc();
+
   std::vector<CordCompareTestCase> test_cases = {{
       // Inline cords
-      {"abcdef", "abcdef"},
-      {"abcdef", "abcdee"},
-      {"abcdef", "abcdeg"},
-      {"bbcdef", "abcdef"},
-      {"bbcdef", "abcdeg"},
-      {"abcdefa", "abcdef"},
-      {"abcdef", "abcdefa"},
+      {"abcdef", "abcdef", use_crc},
+      {"abcdef", "abcdee", use_crc},
+      {"abcdef", "abcdeg", use_crc},
+      {"bbcdef", "abcdef", use_crc},
+      {"bbcdef", "abcdeg", use_crc},
+      {"abcdefa", "abcdef", use_crc},
+      {"abcdef", "abcdefa", use_crc},
 
       // Small flat cords
-      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBcccccDDDDD"},
-      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBxccccDDDDD"},
-      {"aaaaaBBBBBcxcccDDDDD", "aaaaaBBBBBcccccDDDDD"},
-      {"aaaaaBBBBBxccccDDDDD", "aaaaaBBBBBcccccDDDDX"},
-      {"aaaaaBBBBBcccccDDDDDa", "aaaaaBBBBBcccccDDDDD"},
-      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBcccccDDDDDa"},
+      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBcccccDDDDD", use_crc},
+      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBxccccDDDDD", use_crc},
+      {"aaaaaBBBBBcxcccDDDDD", "aaaaaBBBBBcccccDDDDD", use_crc},
+      {"aaaaaBBBBBxccccDDDDD", "aaaaaBBBBBcccccDDDDX", use_crc},
+      {"aaaaaBBBBBcccccDDDDDa", "aaaaaBBBBBcccccDDDDD", use_crc},
+      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBcccccDDDDDa", use_crc},
 
       // Subcords
-      {subcord, subcord},
-      {subcord, "aaBBBBBccc"},
-      {subcord, "aaBBBBBccd"},
-      {subcord, "aaBBBBBccb"},
-      {subcord, "aaBBBBBxcb"},
-      {subcord, "aaBBBBBccca"},
-      {subcord, "aaBBBBBcc"},
+      {subcord, subcord, use_crc},
+      {subcord, "aaBBBBBccc", use_crc},
+      {subcord, "aaBBBBBccd", use_crc},
+      {subcord, "aaBBBBBccb", use_crc},
+      {subcord, "aaBBBBBxcb", use_crc},
+      {subcord, "aaBBBBBccca", use_crc},
+      {subcord, "aaBBBBBcc", use_crc},
 
       // Concats
-      {concat, concat},
+      {concat, concat, use_crc},
       {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDDD"},
+       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDDD",
+       use_crc},
       {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBcccccccccccccccxDDDDDDDDDDDDDDDD"},
+       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBcccccccccccccccxDDDDDDDDDDDDDDDD",
+       use_crc},
       {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBacccccccccccccccDDDDDDDDDDDDDDDD"},
+       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBacccccccccccccccDDDDDDDDDDDDDDDD",
+       use_crc},
       {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDD"},
+       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDD",
+       use_crc},
       {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDDDe"},
+       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDDDe",
+       use_crc},
 
-      {concat, concat2},
+      {concat, concat2, use_crc},
   }};
 
   for (const auto& tc : test_cases) {
@@ -936,6 +1388,7 @@ TEST_P(CordTest, Compare) {
 TEST_P(CordTest, CompareAfterAssign) {
   absl::Cord a("aaaaaa1111111");
   absl::Cord b("aaaaaa2222222");
+  MaybeHarden(a);
   a = "cccccc";
   b = "cccccc";
   EXPECT_EQ(a, b);
@@ -994,6 +1447,8 @@ TEST_P(CordTest, CompareRandomComparisons) {
       d.Append(a[GetUniformRandomUpTo(&rng, ABSL_ARRAYSIZE(a))]);
     }
     std::bernoulli_distribution coin_flip(0.5);
+    MaybeHarden(c);
+    MaybeHarden(d);
     TestCompare(coin_flip(rng) ? c : absl::Cord(std::string(c)),
                 coin_flip(rng) ? d : absl::Cord(std::string(d)), &rng);
   }
@@ -1119,6 +1574,7 @@ TEST_P(CordTest, ConstructFromExternalCompareContents) {
           EXPECT_EQ(external->size(), sv.size());
           delete external;
         });
+    MaybeHarden(cord);
     EXPECT_EQ(data, cord);
   }
 }
@@ -1134,7 +1590,7 @@ TEST_P(CordTest, ConstructFromExternalLargeReleaser) {
     EXPECT_EQ(data, absl::string_view(data_array.data(), data_array.size()));
     invoked = true;
   };
-  (void)absl::MakeCordFromExternal(data, releaser);
+  (void)MaybeHardened(absl::MakeCordFromExternal(data, releaser));
   EXPECT_TRUE(invoked);
 }
 
@@ -1147,11 +1603,11 @@ TEST_P(CordTest, ConstructFromExternalFunctionPointerReleaser) {
         invoked = true;
       });
   invoked = false;
-  (void)absl::MakeCordFromExternal(data, releaser);
+  (void)MaybeHardened(absl::MakeCordFromExternal(data, releaser));
   EXPECT_TRUE(invoked);
 
   invoked = false;
-  (void)absl::MakeCordFromExternal(data, *releaser);
+  (void)MaybeHardened(absl::MakeCordFromExternal(data, *releaser));
   EXPECT_TRUE(invoked);
 }
 
@@ -1165,20 +1621,21 @@ TEST_P(CordTest, ConstructFromExternalMoveOnlyReleaser) {
   };
 
   bool invoked = false;
-  (void)absl::MakeCordFromExternal("dummy", Releaser(&invoked));
+  (void)MaybeHardened(absl::MakeCordFromExternal("dummy", Releaser(&invoked)));
   EXPECT_TRUE(invoked);
 }
 
 TEST_P(CordTest, ConstructFromExternalNoArgLambda) {
   bool invoked = false;
-  (void)absl::MakeCordFromExternal("dummy", [&invoked]() { invoked = true; });
+  (void)MaybeHardened(
+      absl::MakeCordFromExternal("dummy", [&invoked]() { invoked = true; }));
   EXPECT_TRUE(invoked);
 }
 
 TEST_P(CordTest, ConstructFromExternalStringViewArgLambda) {
   bool invoked = false;
-  (void)absl::MakeCordFromExternal(
-      "dummy", [&invoked](absl::string_view) { invoked = true; });
+  (void)MaybeHardened(absl::MakeCordFromExternal(
+      "dummy", [&invoked](absl::string_view) { invoked = true; }));
   EXPECT_TRUE(invoked);
 }
 
@@ -1193,43 +1650,78 @@ TEST_P(CordTest, ConstructFromExternalNonTrivialReleaserDestructor) {
 
   bool destroyed = false;
   Releaser releaser(&destroyed);
-  (void)absl::MakeCordFromExternal("dummy", releaser);
+  (void)MaybeHardened(absl::MakeCordFromExternal("dummy", releaser));
   EXPECT_TRUE(destroyed);
 }
 
 TEST_P(CordTest, ConstructFromExternalReferenceQualifierOverloads) {
-  struct Releaser {
-    void operator()(absl::string_view) & { *lvalue_invoked = true; }
-    void operator()(absl::string_view) && { *rvalue_invoked = true; }
+  enum InvokedAs { kMissing, kLValue, kRValue };
+  enum CopiedAs { kNone, kMove, kCopy };
+  struct Tracker {
+    CopiedAs copied_as = kNone;
+    InvokedAs invoked_as = kMissing;
+
+    void Record(InvokedAs rhs) {
+      ASSERT_EQ(invoked_as, kMissing);
+      invoked_as = rhs;
+    }
+
+    void Record(CopiedAs rhs) {
+      if (copied_as == kNone || rhs == kCopy) copied_as = rhs;
+    }
+  } tracker;
 
-    bool* lvalue_invoked;
-    bool* rvalue_invoked;
+  class Releaser {
+   public:
+    explicit Releaser(Tracker* tracker) : tr_(tracker) { *tracker = Tracker(); }
+    Releaser(Releaser&& rhs) : tr_(rhs.tr_) { tr_->Record(kMove); }
+    Releaser(const Releaser& rhs) : tr_(rhs.tr_) { tr_->Record(kCopy); }
+
+    void operator()(absl::string_view) & { tr_->Record(kLValue); }
+    void operator()(absl::string_view) && { tr_->Record(kRValue); }
+
+   private:
+    Tracker* tr_;
   };
 
-  bool lvalue_invoked = false;
-  bool rvalue_invoked = false;
-  Releaser releaser = {&lvalue_invoked, &rvalue_invoked};
-  (void)absl::MakeCordFromExternal("", releaser);
-  EXPECT_FALSE(lvalue_invoked);
-  EXPECT_TRUE(rvalue_invoked);
-  rvalue_invoked = false;
+  const Releaser releaser1(&tracker);
+  (void)MaybeHardened(absl::MakeCordFromExternal("", releaser1));
+  EXPECT_EQ(tracker.copied_as, kCopy);
+  EXPECT_EQ(tracker.invoked_as, kRValue);
+
+  const Releaser releaser2(&tracker);
+  (void)MaybeHardened(absl::MakeCordFromExternal("", releaser2));
+  EXPECT_EQ(tracker.copied_as, kCopy);
+  EXPECT_EQ(tracker.invoked_as, kRValue);
+
+  Releaser releaser3(&tracker);
+  (void)MaybeHardened(absl::MakeCordFromExternal("", std::move(releaser3)));
+  EXPECT_EQ(tracker.copied_as, kMove);
+  EXPECT_EQ(tracker.invoked_as, kRValue);
 
-  (void)absl::MakeCordFromExternal("dummy", releaser);
-  EXPECT_FALSE(lvalue_invoked);
-  EXPECT_TRUE(rvalue_invoked);
-  rvalue_invoked = false;
+  Releaser releaser4(&tracker);
+  (void)MaybeHardened(absl::MakeCordFromExternal("dummy", releaser4));
+  EXPECT_EQ(tracker.copied_as, kCopy);
+  EXPECT_EQ(tracker.invoked_as, kRValue);
 
-  // NOLINTNEXTLINE: suppress clang-tidy std::move on trivially copyable type.
-  (void)absl::MakeCordFromExternal("dummy", std::move(releaser));
-  EXPECT_FALSE(lvalue_invoked);
-  EXPECT_TRUE(rvalue_invoked);
+  const Releaser releaser5(&tracker);
+  (void)MaybeHardened(absl::MakeCordFromExternal("dummy", releaser5));
+  EXPECT_EQ(tracker.copied_as, kCopy);
+  EXPECT_EQ(tracker.invoked_as, kRValue);
+
+  Releaser releaser6(&tracker);
+  (void)MaybeHardened(absl::MakeCordFromExternal("foo", std::move(releaser6)));
+  EXPECT_EQ(tracker.copied_as, kMove);
+  EXPECT_EQ(tracker.invoked_as, kRValue);
 }
 
 TEST_P(CordTest, ExternalMemoryBasicUsage) {
   static const char* strings[] = {"", "hello", "there"};
   for (const char* str : strings) {
     absl::Cord dst("(prefix)");
+    MaybeHarden(dst);
     AddExternalMemory(str, &dst);
+    MaybeHarden(dst);
     dst.Append("(suffix)");
     EXPECT_EQ((std::string("(prefix)") + str + std::string("(suffix)")),
               std::string(dst));
@@ -1243,7 +1735,9 @@ TEST_P(CordTest, ExternalMemoryRemovePrefixSuffix) {
   for (int offset = 0; offset <= s.size(); offset++) {
     for (int length = 0; length <= s.size() - offset; length++) {
       absl::Cord result(cord);
+      MaybeHarden(result);
       result.RemovePrefix(offset);
+      MaybeHarden(result);
       result.RemoveSuffix(result.size() - length);
       EXPECT_EQ(s.substr(offset, length), std::string(result))
           << offset << " " << length;
@@ -1254,8 +1748,10 @@ TEST_P(CordTest, ExternalMemoryRemovePrefixSuffix) {
 TEST_P(CordTest, ExternalMemoryGet) {
   absl::Cord cord("hello");
   AddExternalMemory(" world!", &cord);
+  MaybeHarden(cord);
   AddExternalMemory(" how are ", &cord);
   cord.Append(" you?");
+  MaybeHarden(cord);
   std::string s = std::string(cord);
   for (int i = 0; i < s.size(); i++) {
     EXPECT_EQ(s[i], cord[i]);
@@ -1263,76 +1759,133 @@ TEST_P(CordTest, ExternalMemoryGet) {
 }
 
 // CordMemoryUsage tests verify the correctness of the EstimatedMemoryUsage()
-// These tests take into account that the reported memory usage is approximate
-// and non-deterministic. For all tests, We verify that the reported memory
-// usage is larger than `size()`, and less than `size() * 1.5` as a cord should
-// never reserve more 'extra' capacity than half of its size as it grows.
-// Additionally we have some whiteboxed expectations based on our knowledge of
-// the layout and size of empty and inlined cords, and flat nodes.
+// We use whiteboxed expectations based on our knowledge of the layout and size
+// of empty and inlined cords, and flat nodes.
+
+constexpr auto kFairShare = absl::CordMemoryAccounting::kFairShare;
 
-TEST_P(CordTest, CordMemoryUsageEmpty) {
-  EXPECT_EQ(sizeof(absl::Cord), absl::Cord().EstimatedMemoryUsage());
+// Creates a cord of `n` `c` values, making sure no string stealing occurs.
+absl::Cord MakeCord(size_t n, char c) {
+  const std::string s(n, c);
+  return absl::Cord(s);
 }
 
-TEST_P(CordTest, CordMemoryUsageEmbedded) {
-  absl::Cord a("hello");
-  EXPECT_EQ(a.EstimatedMemoryUsage(), sizeof(absl::Cord));
+TEST(CordTest, CordMemoryUsageEmpty) {
+  absl::Cord cord;
+  EXPECT_EQ(sizeof(absl::Cord), cord.EstimatedMemoryUsage());
+  EXPECT_EQ(sizeof(absl::Cord), cord.EstimatedMemoryUsage(kFairShare));
 }
 
-TEST_P(CordTest, CordMemoryUsageEmbeddedAppend) {
-  absl::Cord a("a");
-  absl::Cord b("bcd");
-  EXPECT_EQ(b.EstimatedMemoryUsage(), sizeof(absl::Cord));
-  a.Append(b);
+TEST(CordTest, CordMemoryUsageInlined) {
+  absl::Cord a("hello");
   EXPECT_EQ(a.EstimatedMemoryUsage(), sizeof(absl::Cord));
+  EXPECT_EQ(a.EstimatedMemoryUsage(kFairShare), sizeof(absl::Cord));
 }
 
-TEST_P(CordTest, CordMemoryUsageExternalMemory) {
-  static const int kLength = 1000;
+TEST(CordTest, CordMemoryUsageExternalMemory) {
   absl::Cord cord;
-  AddExternalMemory(std::string(kLength, 'x'), &cord);
-  EXPECT_GT(cord.EstimatedMemoryUsage(), kLength);
-  EXPECT_LE(cord.EstimatedMemoryUsage(), kLength * 1.5);
-}
+  AddExternalMemory(std::string(1000, 'x'), &cord);
+  const size_t expected =
+      sizeof(absl::Cord) + 1000 + sizeof(CordRepExternal) + sizeof(intptr_t);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(), expected);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(kFairShare), expected);
+}
+
+TEST(CordTest, CordMemoryUsageFlat) {
+  absl::Cord cord = MakeCord(1000, 'a');
+  const size_t flat_size =
+      absl::CordTestPeer::Tree(cord)->flat()->AllocatedSize();
+  EXPECT_EQ(cord.EstimatedMemoryUsage(), sizeof(absl::Cord) + flat_size);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + flat_size);
+}
+
+TEST(CordTest, CordMemoryUsageSubStringSharedFlat) {
+  absl::Cord flat = MakeCord(2000, 'a');
+  const size_t flat_size =
+      absl::CordTestPeer::Tree(flat)->flat()->AllocatedSize();
+  absl::Cord cord = flat.Subcord(500, 1000);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(),
+            sizeof(absl::Cord) + sizeof(CordRepSubstring) + flat_size);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + sizeof(CordRepSubstring) + flat_size / 2);
+}
+
+TEST(CordTest, CordMemoryUsageFlatShared) {
+  absl::Cord shared = MakeCord(1000, 'a');
+  absl::Cord cord(shared);
+  const size_t flat_size =
+      absl::CordTestPeer::Tree(cord)->flat()->AllocatedSize();
+  EXPECT_EQ(cord.EstimatedMemoryUsage(), sizeof(absl::Cord) + flat_size);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + flat_size / 2);
+}
+
+TEST(CordTest, CordMemoryUsageFlatHardenedAndShared) {
+  absl::Cord shared = MakeCord(1000, 'a');
+  absl::Cord cord(shared);
+  const size_t flat_size =
+      absl::CordTestPeer::Tree(cord)->flat()->AllocatedSize();
+  cord.SetExpectedChecksum(1);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(),
+            sizeof(absl::Cord) + sizeof(CordRepCrc) + flat_size);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + sizeof(CordRepCrc) + flat_size / 2);
+
+  absl::Cord cord2(cord);
+  EXPECT_EQ(cord2.EstimatedMemoryUsage(),
+            sizeof(absl::Cord) + sizeof(CordRepCrc) + flat_size);
+  EXPECT_EQ(cord2.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + (sizeof(CordRepCrc) + flat_size / 2) / 2);
+}
+
+TEST(CordTest, CordMemoryUsageBTree) {
+  absl::Cord cord1;
+  size_t flats1_size = 0;
+  absl::Cord flats1[4] = {MakeCord(1000, 'a'), MakeCord(1100, 'a'),
+                          MakeCord(1200, 'a'), MakeCord(1300, 'a')};
+  for (absl::Cord flat : flats1) {
+    flats1_size += absl::CordTestPeer::Tree(flat)->flat()->AllocatedSize();
+    cord1.Append(std::move(flat));
+  }
 
-TEST_P(CordTest, CordMemoryUsageFlat) {
-  static const int kLength = 125;
-  absl::Cord a(std::string(kLength, 'a'));
-  EXPECT_GT(a.EstimatedMemoryUsage(), kLength);
-  EXPECT_LE(a.EstimatedMemoryUsage(), kLength * 1.5);
-}
+  // Make sure the created cord is a BTREE tree. Under some builds such as
+  // windows DLL, we may have ODR like effects on the flag, meaning the DLL
+  // code will run with the picked up default.
+  if (!absl::CordTestPeer::Tree(cord1)->IsBtree()) {
+    ABSL_RAW_LOG(WARNING, "Cord library code not respecting btree flag");
+    return;
+  }
 
-TEST_P(CordTest, CordMemoryUsageAppendFlat) {
-  using absl::strings_internal::CordTestAccess;
-  absl::Cord a(std::string(CordTestAccess::MaxFlatLength(), 'a'));
-  size_t length = a.EstimatedMemoryUsage();
-  a.Append(std::string(CordTestAccess::MaxFlatLength(), 'b'));
-  size_t delta = a.EstimatedMemoryUsage() - length;
-  EXPECT_GT(delta, CordTestAccess::MaxFlatLength());
-  EXPECT_LE(delta, CordTestAccess::MaxFlatLength() * 1.5);
-}
+  size_t rep1_size = sizeof(CordRepBtree) + flats1_size;
+  size_t rep1_shared_size = sizeof(CordRepBtree) + flats1_size / 2;
 
-TEST_P(CordTest, CordMemoryUsageAppendExternal) {
-  static const int kLength = 1000;
-  using absl::strings_internal::CordTestAccess;
-  absl::Cord a(std::string(CordTestAccess::MaxFlatLength(), 'a'));
-  size_t length = a.EstimatedMemoryUsage();
-  AddExternalMemory(std::string(kLength, 'b'), &a);
-  size_t delta = a.EstimatedMemoryUsage() - length;
-  EXPECT_GT(delta, kLength);
-  EXPECT_LE(delta, kLength * 1.5);
-}
+  EXPECT_EQ(cord1.EstimatedMemoryUsage(), sizeof(absl::Cord) + rep1_size);
+  EXPECT_EQ(cord1.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + rep1_shared_size);
 
-TEST_P(CordTest, CordMemoryUsageSubString) {
-  static const int kLength = 2000;
-  using absl::strings_internal::CordTestAccess;
-  absl::Cord a(std::string(kLength, 'a'));
-  size_t length = a.EstimatedMemoryUsage();
-  AddExternalMemory(std::string(kLength, 'b'), &a);
-  absl::Cord b = a.Subcord(0, kLength + kLength / 2);
-  size_t delta = b.EstimatedMemoryUsage() - length;
-  EXPECT_GT(delta, kLength);
-  EXPECT_LE(delta, kLength * 1.5);
+  absl::Cord cord2;
+  size_t flats2_size = 0;
+  absl::Cord flats2[4] = {MakeCord(600, 'a'), MakeCord(700, 'a'),
+                          MakeCord(800, 'a'), MakeCord(900, 'a')};
+  for (absl::Cord& flat : flats2) {
+    flats2_size += absl::CordTestPeer::Tree(flat)->flat()->AllocatedSize();
+    cord2.Append(std::move(flat));
+  }
+  size_t rep2_size = sizeof(CordRepBtree) + flats2_size;
+
+  EXPECT_EQ(cord2.EstimatedMemoryUsage(), sizeof(absl::Cord) + rep2_size);
+  EXPECT_EQ(cord2.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + rep2_size);
+
+  absl::Cord cord(cord1);
+  cord.Append(std::move(cord2));
+
+  EXPECT_EQ(cord.EstimatedMemoryUsage(),
+            sizeof(absl::Cord) + sizeof(CordRepBtree) + rep1_size + rep2_size);
+  EXPECT_EQ(cord.EstimatedMemoryUsage(kFairShare),
+            sizeof(absl::Cord) + sizeof(CordRepBtree) + rep1_shared_size / 2 +
+                rep2_size);
 }
 
 // Regtest for a change that had to be rolled back because it expanded out
@@ -1354,11 +1907,13 @@ TEST_P(CordTest, CordMemoryUsageInlineRep) {
 TEST_P(CordTest, Concat_Append) {
   // Create a rep of type CONCAT
   absl::Cord s1("foobarbarbarbarbar");
+  MaybeHarden(s1);
   s1.Append("abcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefg");
   size_t size = s1.size();
 
   // Create a copy of s1 and append to it.
   absl::Cord s2 = s1;
+  MaybeHarden(s2);
   s2.Append("x");
 
   // 7465150 modifies s1 when it shouldn't.
@@ -1378,6 +1933,7 @@ TEST_P(CordTest, DiabolicalGrowth) {
   for (char c : expected) {
     absl::Cord shared(cord);
     cord.Append(absl::string_view(&c, 1));
+    MaybeHarden(cord);
   }
   std::string value;
   absl::CopyCordToString(cord, &value);
@@ -1422,17 +1978,28 @@ static absl::Cord MakeHuge(absl::string_view prefix) {
 
 TEST_P(CordTest, HugeCord) {
   absl::Cord cord = MakeHuge("huge cord");
+  MaybeHarden(cord);
+
+  const size_t acceptable_delta =
+      100 + (UseCrc() ? sizeof(absl::cord_internal::CordRepCrc) : 0);
   EXPECT_LE(cord.size(), cord.EstimatedMemoryUsage());
-  EXPECT_GE(cord.size() + 100, cord.EstimatedMemoryUsage());
+  EXPECT_GE(cord.size() + acceptable_delta, cord.EstimatedMemoryUsage());
 }
 
 // Tests that Append() works ok when handed a self reference
 TEST_P(CordTest, AppendSelf) {
+  // Test the empty case.
+  absl::Cord empty;
+  MaybeHarden(empty);
+  empty.Append(empty);
+  ASSERT_EQ(empty, "");
+
   // We run the test until data is ~16K
   // This guarantees it covers small, medium and large data.
   std::string control_data = "Abc";
   absl::Cord data(control_data);
   while (control_data.length() < 0x4000) {
+    MaybeHarden(data);
     data.Append(data);
     control_data.append(control_data);
     ASSERT_EQ(control_data, data);
@@ -1443,6 +2010,8 @@ TEST_P(CordTest, MakeFragmentedCordFromInitializerList) {
   absl::Cord fragmented =
       absl::MakeFragmentedCord({"A ", "fragmented ", "Cord"});
 
+  MaybeHarden(fragmented);
+
   EXPECT_EQ("A fragmented Cord", fragmented);
 
   auto chunk_it = fragmented.chunk_begin();
@@ -1463,6 +2032,8 @@ TEST_P(CordTest, MakeFragmentedCordFromVector) {
   std::vector<absl::string_view> chunks = {"A ", "fragmented ", "Cord"};
   absl::Cord fragmented = absl::MakeFragmentedCord(chunks);
 
+  MaybeHarden(fragmented);
+
   EXPECT_EQ("A fragmented Cord", fragmented);
 
   auto chunk_it = fragmented.chunk_begin();
@@ -1565,22 +2136,26 @@ TEST_P(CordTest, CordChunkIteratorOperations) {
   VerifyChunkIterator(empty_cord, 0);
 
   absl::Cord small_buffer_cord("small cord");
+  MaybeHarden(small_buffer_cord);
   VerifyChunkIterator(small_buffer_cord, 1);
 
   absl::Cord flat_node_cord("larger than small buffer optimization");
+  MaybeHarden(flat_node_cord);
   VerifyChunkIterator(flat_node_cord, 1);
 
-  VerifyChunkIterator(
-      absl::MakeFragmentedCord({"a ", "small ", "fragmented ", "cord ", "for ",
-                                "testing ", "chunk ", "iterations."}),
-      8);
+  VerifyChunkIterator(MaybeHardened(absl::MakeFragmentedCord(
+                          {"a ", "small ", "fragmented ", "cord ", "for ",
+                           "testing ", "chunk ", "iterations."})),
+                      8);
 
   absl::Cord reused_nodes_cord(std::string(40, 'c'));
   reused_nodes_cord.Prepend(absl::Cord(std::string(40, 'b')));
+  MaybeHarden(reused_nodes_cord);
   reused_nodes_cord.Prepend(absl::Cord(std::string(40, 'a')));
   size_t expected_chunks = 3;
   for (int i = 0; i < 8; ++i) {
     reused_nodes_cord.Prepend(reused_nodes_cord);
+    MaybeHarden(reused_nodes_cord);
     expected_chunks *= 2;
     VerifyChunkIterator(reused_nodes_cord, expected_chunks);
   }
@@ -1592,6 +2167,78 @@ TEST_P(CordTest, CordChunkIteratorOperations) {
   VerifyChunkIterator(subcords, 128);
 }
 
+
+TEST_P(CordTest, AdvanceAndReadOnDataEdge) {
+  RandomEngine rng(GTEST_FLAG_GET(random_seed));
+  const std::string data = RandomLowercaseString(&rng, 2000);
+  for (bool as_flat : {true, false}) {
+    SCOPED_TRACE(as_flat ? "Flat" : "External");
+
+    absl::Cord cord =
+        as_flat ? absl::Cord(data)
+                : absl::MakeCordFromExternal(data, [](absl::string_view) {});
+    auto it = cord.Chars().begin();
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
+    EXPECT_DEATH_IF_SUPPORTED(cord.AdvanceAndRead(&it, 2001), ".*");
+#endif
+
+    it = cord.Chars().begin();
+    absl::Cord frag = cord.AdvanceAndRead(&it, 2000);
+    EXPECT_EQ(frag, data);
+    EXPECT_TRUE(it == cord.Chars().end());
+
+    it = cord.Chars().begin();
+    frag = cord.AdvanceAndRead(&it, 200);
+    EXPECT_EQ(frag, data.substr(0, 200));
+    EXPECT_FALSE(it == cord.Chars().end());
+
+    frag = cord.AdvanceAndRead(&it, 1500);
+    EXPECT_EQ(frag, data.substr(200, 1500));
+    EXPECT_FALSE(it == cord.Chars().end());
+
+    frag = cord.AdvanceAndRead(&it, 300);
+    EXPECT_EQ(frag, data.substr(1700, 300));
+    EXPECT_TRUE(it == cord.Chars().end());
+  }
+}
+
+TEST_P(CordTest, AdvanceAndReadOnSubstringDataEdge) {
+  RandomEngine rng(GTEST_FLAG_GET(random_seed));
+  const std::string data = RandomLowercaseString(&rng, 2500);
+  for (bool as_flat : {true, false}) {
+    SCOPED_TRACE(as_flat ? "Flat" : "External");
+
+    absl::Cord cord =
+        as_flat ? absl::Cord(data)
+                : absl::MakeCordFromExternal(data, [](absl::string_view) {});
+    cord = cord.Subcord(200, 2000);
+    const std::string substr = data.substr(200, 2000);
+
+    auto it = cord.Chars().begin();
+#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
+    EXPECT_DEATH_IF_SUPPORTED(cord.AdvanceAndRead(&it, 2001), ".*");
+#endif
+
+    it = cord.Chars().begin();
+    absl::Cord frag = cord.AdvanceAndRead(&it, 2000);
+    EXPECT_EQ(frag, substr);
+    EXPECT_TRUE(it == cord.Chars().end());
+
+    it = cord.Chars().begin();
+    frag = cord.AdvanceAndRead(&it, 200);
+    EXPECT_EQ(frag, substr.substr(0, 200));
+    EXPECT_FALSE(it == cord.Chars().end());
+
+    frag = cord.AdvanceAndRead(&it, 1500);
+    EXPECT_EQ(frag, substr.substr(200, 1500));
+    EXPECT_FALSE(it == cord.Chars().end());
+
+    frag = cord.AdvanceAndRead(&it, 300);
+    EXPECT_EQ(frag, substr.substr(1700, 300));
+    EXPECT_TRUE(it == cord.Chars().end());
+  }
+}
+
 TEST_P(CordTest, CharIteratorTraits) {
   static_assert(std::is_copy_constructible<absl::Cord::CharIterator>::value,
                 "");
@@ -1706,27 +2353,33 @@ TEST_P(CordTest, CharIteratorOperations) {
   VerifyCharIterator(empty_cord);
 
   absl::Cord small_buffer_cord("small cord");
+  MaybeHarden(small_buffer_cord);
   VerifyCharIterator(small_buffer_cord);
 
   absl::Cord flat_node_cord("larger than small buffer optimization");
+  MaybeHarden(flat_node_cord);
   VerifyCharIterator(flat_node_cord);
 
-  VerifyCharIterator(
+  VerifyCharIterator(MaybeHardened(
       absl::MakeFragmentedCord({"a ", "small ", "fragmented ", "cord ", "for ",
-                                "testing ", "character ", "iteration."}));
+                                "testing ", "character ", "iteration."})));
 
   absl::Cord reused_nodes_cord("ghi");
   reused_nodes_cord.Prepend(absl::Cord("def"));
   reused_nodes_cord.Prepend(absl::Cord("abc"));
   for (int i = 0; i < 4; ++i) {
     reused_nodes_cord.Prepend(reused_nodes_cord);
+    MaybeHarden(reused_nodes_cord);
     VerifyCharIterator(reused_nodes_cord);
   }
 
   RandomEngine rng(GTEST_FLAG_GET(random_seed));
   absl::Cord flat_cord(RandomLowercaseString(&rng, 256));
   absl::Cord subcords;
-  for (int i = 0; i < 4; ++i) subcords.Prepend(flat_cord.Subcord(16 * i, 128));
+  for (int i = 0; i < 4; ++i) {
+    subcords.Prepend(flat_cord.Subcord(16 * i, 128));
+    MaybeHarden(subcords);
+  }
   VerifyCharIterator(subcords);
 }
 
@@ -1751,6 +2404,8 @@ TEST_P(CordTest, CharIteratorAdvanceAndRead) {
     cord.Append(absl::Cord(block));
   }
 
+  MaybeHarden(cord);
+
   for (size_t chunk_size :
        {kChunkSize1, kChunkSize2, kChunkSize3, kChunkSize4}) {
     absl::Cord::CharIterator it = cord.char_begin();
@@ -1768,6 +2423,7 @@ TEST_P(CordTest, CharIteratorAdvanceAndRead) {
 TEST_P(CordTest, StreamingOutput) {
   absl::Cord c =
       absl::MakeFragmentedCord({"A ", "small ", "fragmented ", "Cord", "."});
+  MaybeHarden(c);
   std::stringstream output;
   output << c;
   EXPECT_EQ("A small fragmented Cord.", output.str());
@@ -1781,6 +2437,7 @@ TEST_P(CordTest, ForEachChunk) {
       cord_chunks.push_back(absl::StrCat("[", i, "]"));
     }
     absl::Cord c = absl::MakeFragmentedCord(cord_chunks);
+    MaybeHarden(c);
 
     std::vector<std::string> iterated_chunks;
     absl::CordTestPeer::ForEachChunk(c,
@@ -1798,6 +2455,7 @@ TEST_P(CordTest, SmallBufferAssignFromOwnData) {
   for (size_t pos = 0; pos < contents.size(); ++pos) {
     for (size_t count = contents.size() - pos; count > 0; --count) {
       absl::Cord c(contents);
+      MaybeHarden(c);
       absl::string_view flat = c.Flatten();
       c = flat.substr(pos, count);
       EXPECT_EQ(c, contents.substr(pos, count))
@@ -1810,12 +2468,16 @@ TEST_P(CordTest, Format) {
   absl::Cord c;
   absl::Format(&c, "There were %04d little %s.", 3, "pigs");
   EXPECT_EQ(c, "There were 0003 little pigs.");
+  MaybeHarden(c);
   absl::Format(&c, "And %-3llx bad wolf!", 1);
+  MaybeHarden(c);
   EXPECT_EQ(c, "There were 0003 little pigs.And 1   bad wolf!");
 }
 
 TEST_P(CordTest, Hardening) {
   absl::Cord cord("hello");
+  MaybeHarden(cord);
+
   // These statement should abort the program in all builds modes.
   EXPECT_DEATH_IF_SUPPORTED(cord.RemovePrefix(6), "");
   EXPECT_DEATH_IF_SUPPORTED(cord.RemoveSuffix(6), "");
@@ -1855,6 +2517,7 @@ TEST_P(CordTest, BtreeHostileSplitInsertJoin) {
   }
 
   for (int j = 0; j < 1000; ++j) {
+    MaybeHarden(cord);
     size_t offset = absl::Uniform(bitgen, 0u, cord.size());
     size_t length = absl::Uniform(bitgen, 100u, data.size());
     if (cord.size() == offset) {
@@ -1892,12 +2555,34 @@ class AfterExitCordTester {
   absl::string_view expected_;
 };
 
+// Deliberately prevents the destructor for an absl::Cord from running. The cord
+// is accessible via the cord member during the lifetime of the CordLeaker.
+// After the CordLeaker is destroyed, pointers to the cord will remain valid
+// until the CordLeaker's memory is deallocated.
+struct CordLeaker {
+  union {
+    absl::Cord cord;
+  };
+
+  template <typename Str>
+  constexpr explicit CordLeaker(const Str& str) : cord(str) {}
+
+  ~CordLeaker() {
+    // Don't do anything, including running cord's destructor. (cord's
+    // destructor won't run automatically because cord is hidden inside a
+    // union.)
+  }
+};
+
 template <typename Str>
 void TestConstinitConstructor(Str) {
   const auto expected = Str::value;
   // Defined before `cord` to be destroyed after it.
   static AfterExitCordTester exit_tester;  // NOLINT
-  ABSL_CONST_INIT static absl::Cord cord(Str{});  // NOLINT
+  ABSL_CONST_INIT static CordLeaker cord_leaker(Str{});  // NOLINT
+  // cord_leaker is static, so this reference will remain valid through the end
+  // of program execution.
+  static absl::Cord& cord = cord_leaker.cord;
   static bool init_exit_tester = exit_tester.Set(&cord, expected);
   (void)init_exit_tester;
 
@@ -1955,3 +2640,420 @@ TEST_P(CordTest, ConstinitConstructor) {
   TestConstinitConstructor(
       absl::strings_internal::MakeStringConstant(LongView{}));
 }
+
+namespace {
+
+// Test helper that generates a populated cord for future manipulation.
+//
+// By test convention, all generated cords begin with the characters "abcde" at
+// the start of the first chunk.
+class PopulatedCordFactory {
+ public:
+  constexpr PopulatedCordFactory(absl::string_view name,
+                                 absl::Cord (*generator)())
+      : name_(name), generator_(generator) {}
+
+  absl::string_view Name() const { return name_; }
+  absl::Cord Generate() const { return generator_(); }
+
+ private:
+  absl::string_view name_;
+  absl::Cord (*generator_)();
+};
+
+// clang-format off
+// This array is constant-initialized in conformant compilers.
+PopulatedCordFactory cord_factories[] = {
+  {"sso", [] { return absl::Cord("abcde"); }},
+  {"flat", [] {
+    // Too large to live in SSO space, but small enough to be a simple FLAT.
+    absl::Cord flat(absl::StrCat("abcde", std::string(1000, 'x')));
+    flat.Flatten();
+    return flat;
+  }},
+  {"external", [] {
+    // A cheat: we are using a string literal as the external storage, so a
+    // no-op releaser is correct here.
+    return absl::MakeCordFromExternal("abcde External!", []{});
+  }},
+  {"external substring", [] {
+    // A cheat: we are using a string literal as the external storage, so a
+    // no-op releaser is correct here.
+    absl::Cord ext = absl::MakeCordFromExternal("-abcde External!", []{});
+    return absl::CordTestPeer::MakeSubstring(ext, 1, ext.size() - 1);
+  }},
+  {"substring", [] {
+    absl::Cord flat(absl::StrCat("-abcde", std::string(1000, 'x')));
+    flat.Flatten();
+    return flat.Subcord(1, 998);
+  }},
+  {"fragmented", [] {
+    std::string fragment = absl::StrCat("abcde", std::string(195, 'x'));
+    std::vector<std::string> fragments(200, fragment);
+    absl::Cord cord = absl::MakeFragmentedCord(fragments);
+    assert(cord.size() == 40000);
+    return cord;
+  }},
+};
+// clang-format on
+
+// Test helper that can mutate a cord, and possibly undo the mutation, for
+// testing.
+class CordMutator {
+ public:
+  constexpr CordMutator(absl::string_view name, void (*mutate)(absl::Cord&),
+                        void (*undo)(absl::Cord&) = nullptr)
+      : name_(name), mutate_(mutate), undo_(undo) {}
+
+  absl::string_view Name() const { return name_; }
+  void Mutate(absl::Cord& cord) const { mutate_(cord); }
+  bool CanUndo() const { return undo_ != nullptr; }
+  void Undo(absl::Cord& cord) const { undo_(cord); }
+
+ private:
+  absl::string_view name_;
+  void (*mutate_)(absl::Cord&);
+  void (*undo_)(absl::Cord&);
+};
+
+// clang-format off
+// This array is constant-initialized in conformant compilers.
+CordMutator cord_mutators[] = {
+  {"clear", [](absl::Cord& c) { c.Clear(); }},
+  {"overwrite", [](absl::Cord& c) { c = "overwritten"; }},
+  {
+    "append string",
+    [](absl::Cord& c) { c.Append("0123456789"); },
+    [](absl::Cord& c) { c.RemoveSuffix(10); }
+  },
+  {
+    "append cord",
+    [](absl::Cord& c) {
+      c.Append(absl::MakeFragmentedCord({"12345", "67890"}));
+    },
+    [](absl::Cord& c) { c.RemoveSuffix(10); }
+  },
+  {
+    "append checksummed cord",
+    [](absl::Cord& c) {
+      absl::Cord to_append = absl::MakeFragmentedCord({"12345", "67890"});
+      to_append.SetExpectedChecksum(999);
+      c.Append(to_append);
+    },
+    [](absl::Cord& c) { c.RemoveSuffix(10); }
+  },
+  {
+    "append self",
+    [](absl::Cord& c) { c.Append(c); },
+    [](absl::Cord& c) { c.RemoveSuffix(c.size() / 2); }
+  },
+  {
+    "append empty string",
+    [](absl::Cord& c) { c.Append(""); },
+    [](absl::Cord& c) { }
+  },
+  {
+    "append empty cord",
+    [](absl::Cord& c) { c.Append(absl::Cord()); },
+    [](absl::Cord& c) { }
+  },
+  {
+    "append empty checksummed cord",
+    [](absl::Cord& c) {
+      absl::Cord to_append;
+      to_append.SetExpectedChecksum(999);
+      c.Append(to_append);
+    },
+    [](absl::Cord& c) { }
+  },
+  {
+    "prepend string",
+    [](absl::Cord& c) { c.Prepend("9876543210"); },
+    [](absl::Cord& c) { c.RemovePrefix(10); }
+  },
+  {
+    "prepend cord",
+    [](absl::Cord& c) {
+      c.Prepend(absl::MakeFragmentedCord({"98765", "43210"}));
+    },
+    [](absl::Cord& c) { c.RemovePrefix(10); }
+  },
+  {
+    "prepend checksummed cord",
+    [](absl::Cord& c) {
+      absl::Cord to_prepend = absl::MakeFragmentedCord({"98765", "43210"});
+      to_prepend.SetExpectedChecksum(999);
+      c.Prepend(to_prepend);
+    },
+    [](absl::Cord& c) { c.RemovePrefix(10); }
+  },
+  {
+    "prepend empty string",
+    [](absl::Cord& c) { c.Prepend(""); },
+    [](absl::Cord& c) { }
+  },
+  {
+    "prepend empty cord",
+    [](absl::Cord& c) { c.Prepend(absl::Cord()); },
+    [](absl::Cord& c) { }
+  },
+  {
+    "prepend empty checksummed cord",
+    [](absl::Cord& c) {
+      absl::Cord to_prepend;
+      to_prepend.SetExpectedChecksum(999);
+      c.Prepend(to_prepend);
+    },
+    [](absl::Cord& c) { }
+  },
+  {
+    "prepend self",
+    [](absl::Cord& c) { c.Prepend(c); },
+    [](absl::Cord& c) { c.RemovePrefix(c.size() / 2); }
+  },
+  {"remove prefix", [](absl::Cord& c) { c.RemovePrefix(c.size() / 2); }},
+  {"remove suffix", [](absl::Cord& c) { c.RemoveSuffix(c.size() / 2); }},
+  {"remove 0-prefix", [](absl::Cord& c) { c.RemovePrefix(0); }},
+  {"remove 0-suffix", [](absl::Cord& c) { c.RemoveSuffix(0); }},
+  {"subcord", [](absl::Cord& c) { c = c.Subcord(1, c.size() - 2); }},
+  {
+    "swap inline",
+    [](absl::Cord& c) {
+      absl::Cord other("swap");
+      c.swap(other);
+    }
+  },
+  {
+    "swap tree",
+    [](absl::Cord& c) {
+      absl::Cord other(std::string(10000, 'x'));
+      c.swap(other);
+    }
+  },
+};
+// clang-format on
+}  // namespace
+
+TEST_P(CordTest, ExpectedChecksum) {
+  for (const PopulatedCordFactory& factory : cord_factories) {
+    SCOPED_TRACE(factory.Name());
+    for (bool shared : {false, true}) {
+      SCOPED_TRACE(shared);
+
+      absl::Cord shared_cord_source = factory.Generate();
+      auto make_instance = [=] {
+        return shared ? shared_cord_source : factory.Generate();
+      };
+
+      const absl::Cord base_value = factory.Generate();
+      const std::string base_value_as_string(factory.Generate().Flatten());
+
+      absl::Cord c1 = make_instance();
+      EXPECT_FALSE(c1.ExpectedChecksum().has_value());
+
+      // Setting an expected checksum works, and retains the cord's bytes
+      c1.SetExpectedChecksum(12345);
+      EXPECT_EQ(c1.ExpectedChecksum().value_or(0), 12345);
+      EXPECT_EQ(c1, base_value);
+
+      // Test that setting an expected checksum again doesn't crash or leak
+      // memory.
+      c1.SetExpectedChecksum(12345);
+      EXPECT_EQ(c1.ExpectedChecksum().value_or(0), 12345);
+      EXPECT_EQ(c1, base_value);
+
+      // CRC persists through copies, assignments, and moves:
+      absl::Cord c1_copy_construct = c1;
+      EXPECT_EQ(c1_copy_construct.ExpectedChecksum().value_or(0), 12345);
+
+      absl::Cord c1_copy_assign;
+      c1_copy_assign = c1;
+      EXPECT_EQ(c1_copy_assign.ExpectedChecksum().value_or(0), 12345);
+
+      absl::Cord c1_move(std::move(c1_copy_assign));
+      EXPECT_EQ(c1_move.ExpectedChecksum().value_or(0), 12345);
+
+      EXPECT_EQ(c1.ExpectedChecksum().value_or(0), 12345);
+
+      // A CRC Cord compares equal to its non-CRC value.
+      EXPECT_EQ(c1, make_instance());
+
+      for (const CordMutator& mutator : cord_mutators) {
+        SCOPED_TRACE(mutator.Name());
+
+        // Test that mutating a cord removes its stored checksum
+        absl::Cord c2 = make_instance();
+        c2.SetExpectedChecksum(24680);
+
+        mutator.Mutate(c2);
+
+        if (c1 == c2) {
+          // Not a mutation (for example, appending the empty string).
+          // Whether the checksum is removed is not defined.
+          continue;
+        }
+
+        EXPECT_EQ(c2.ExpectedChecksum(), absl::nullopt);
+
+        if (mutator.CanUndo()) {
+          // Undoing an operation should not restore the checksum
+          mutator.Undo(c2);
+          EXPECT_EQ(c2, base_value);
+          EXPECT_EQ(c2.ExpectedChecksum(), absl::nullopt);
+        }
+      }
+
+      absl::Cord c3 = make_instance();
+      c3.SetExpectedChecksum(999);
+      const absl::Cord& cc3 = c3;
+
+      // Test that all cord reading operations function in the face of an
+      // expected checksum.
+
+      // Test data precondition
+      ASSERT_TRUE(cc3.StartsWith("abcde"));
+
+      EXPECT_EQ(cc3.size(), base_value_as_string.size());
+      EXPECT_FALSE(cc3.empty());
+      EXPECT_EQ(cc3.Compare(base_value), 0);
+      EXPECT_EQ(cc3.Compare(base_value_as_string), 0);
+      EXPECT_EQ(cc3.Compare("wxyz"), -1);
+      EXPECT_EQ(cc3.Compare(absl::Cord("wxyz")), -1);
+      EXPECT_EQ(cc3.Compare("aaaa"), 1);
+      EXPECT_EQ(cc3.Compare(absl::Cord("aaaa")), 1);
+      EXPECT_EQ(absl::Cord("wxyz").Compare(cc3), 1);
+      EXPECT_EQ(absl::Cord("aaaa").Compare(cc3), -1);
+      EXPECT_TRUE(cc3.StartsWith("abcd"));
+      EXPECT_EQ(std::string(cc3), base_value_as_string);
+
+      std::string dest;
+      absl::CopyCordToString(cc3, &dest);
+      EXPECT_EQ(dest, base_value_as_string);
+
+      bool first_pass = true;
+      for (absl::string_view chunk : cc3.Chunks()) {
+        if (first_pass) {
+          EXPECT_TRUE(absl::StartsWith(chunk, "abcde"));
+        }
+        first_pass = false;
+      }
+      first_pass = true;
+      for (char ch : cc3.Chars()) {
+        if (first_pass) {
+          EXPECT_EQ(ch, 'a');
+        }
+        first_pass = false;
+      }
+      EXPECT_TRUE(absl::StartsWith(*cc3.chunk_begin(), "abcde"));
+      EXPECT_EQ(*cc3.char_begin(), 'a');
+
+      auto char_it = cc3.char_begin();
+      absl::Cord::Advance(&char_it, 2);
+      EXPECT_EQ(absl::Cord::AdvanceAndRead(&char_it, 2), "cd");
+      EXPECT_EQ(*char_it, 'e');
+      char_it = cc3.char_begin();
+      absl::Cord::Advance(&char_it, 2);
+      EXPECT_TRUE(absl::StartsWith(absl::Cord::ChunkRemaining(char_it), "cde"));
+
+      EXPECT_EQ(cc3[0], 'a');
+      EXPECT_EQ(cc3[4], 'e');
+      EXPECT_EQ(absl::HashOf(cc3), absl::HashOf(base_value));
+      EXPECT_EQ(absl::HashOf(cc3), absl::HashOf(base_value_as_string));
+    }
+  }
+}
+
+// Test the special cases encountered with an empty checksummed cord.
+TEST_P(CordTest, ChecksummedEmptyCord) {
+  absl::Cord c1;
+  EXPECT_FALSE(c1.ExpectedChecksum().has_value());
+
+  // Setting an expected checksum works.
+  c1.SetExpectedChecksum(12345);
+  EXPECT_EQ(c1.ExpectedChecksum().value_or(0), 12345);
+  EXPECT_EQ(c1, "");
+  EXPECT_TRUE(c1.empty());
+
+  // Test that setting an expected checksum again doesn't crash or leak memory.
+  c1.SetExpectedChecksum(12345);
+  EXPECT_EQ(c1.ExpectedChecksum().value_or(0), 12345);
+  EXPECT_EQ(c1, "");
+  EXPECT_TRUE(c1.empty());
+
+  // CRC persists through copies, assignments, and moves:
+  absl::Cord c1_copy_construct = c1;
+  EXPECT_EQ(c1_copy_construct.ExpectedChecksum().value_or(0), 12345);
+
+  absl::Cord c1_copy_assign;
+  c1_copy_assign = c1;
+  EXPECT_EQ(c1_copy_assign.ExpectedChecksum().value_or(0), 12345);
+
+  absl::Cord c1_move(std::move(c1_copy_assign));
+  EXPECT_EQ(c1_move.ExpectedChecksum().value_or(0), 12345);
+
+  EXPECT_EQ(c1.ExpectedChecksum().value_or(0), 12345);
+
+  // A CRC Cord compares equal to its non-CRC value.
+  EXPECT_EQ(c1, absl::Cord());
+
+  for (const CordMutator& mutator : cord_mutators) {
+    SCOPED_TRACE(mutator.Name());
+
+    // Exercise mutating an empty checksummed cord to catch crashes and exercise
+    // memory sanitizers.
+    absl::Cord c2;
+    c2.SetExpectedChecksum(24680);
+    mutator.Mutate(c2);
+
+    if (c2.empty()) {
+      // Not a mutation
+      continue;
+    }
+    EXPECT_EQ(c2.ExpectedChecksum(), absl::nullopt);
+
+    if (mutator.CanUndo()) {
+      mutator.Undo(c2);
+    }
+  }
+
+  absl::Cord c3;
+  c3.SetExpectedChecksum(999);
+  const absl::Cord& cc3 = c3;
+
+  // Test that all cord reading operations function in the face of an
+  // expected checksum.
+  EXPECT_TRUE(cc3.StartsWith(""));
+  EXPECT_TRUE(cc3.EndsWith(""));
+  EXPECT_TRUE(cc3.empty());
+  EXPECT_EQ(cc3, "");
+  EXPECT_EQ(cc3, absl::Cord());
+  EXPECT_EQ(cc3.size(), 0);
+  EXPECT_EQ(cc3.Compare(absl::Cord()), 0);
+  EXPECT_EQ(cc3.Compare(c1), 0);
+  EXPECT_EQ(cc3.Compare(cc3), 0);
+  EXPECT_EQ(cc3.Compare(""), 0);
+  EXPECT_EQ(cc3.Compare("wxyz"), -1);
+  EXPECT_EQ(cc3.Compare(absl::Cord("wxyz")), -1);
+  EXPECT_EQ(absl::Cord("wxyz").Compare(cc3), 1);
+  EXPECT_EQ(std::string(cc3), "");
+
+  std::string dest;
+  absl::CopyCordToString(cc3, &dest);
+  EXPECT_EQ(dest, "");
+
+  for (absl::string_view chunk : cc3.Chunks()) {  // NOLINT(unreachable loop)
+    static_cast<void>(chunk);
+    GTEST_FAIL() << "no chunks expected";
+  }
+  EXPECT_TRUE(cc3.chunk_begin() == cc3.chunk_end());
+
+  for (char ch : cc3.Chars()) {  // NOLINT(unreachable loop)
+    static_cast<void>(ch);
+    GTEST_FAIL() << "no chars expected";
+  }
+  EXPECT_TRUE(cc3.char_begin() == cc3.char_end());
+
+  EXPECT_EQ(cc3.TryFlat(), "");
+  EXPECT_EQ(absl::HashOf(c3), absl::HashOf(absl::Cord()));
+  EXPECT_EQ(absl::HashOf(c3), absl::HashOf(absl::string_view()));
+}
diff --git a/third_party/abseil-cpp/absl/strings/escaping.cc b/third_party/abseil-cpp/absl/strings/escaping.cc
index 18b20b83fd..7d97944eba 100644
--- a/third_party/abseil-cpp/absl/strings/escaping.cc
+++ b/third_party/abseil-cpp/absl/strings/escaping.cc
@@ -42,11 +42,11 @@ constexpr bool kUnescapeNulls = false;
 
 inline bool is_octal_digit(char c) { return ('0' <= c) && (c <= '7'); }
 
-inline int hex_digit_to_int(char c) {
+inline unsigned int hex_digit_to_int(char c) {
   static_assert('0' == 0x30 && 'A' == 0x41 && 'a' == 0x61,
                 "Character set must be ASCII.");
-  assert(absl::ascii_isxdigit(c));
-  int x = static_cast<unsigned char>(c);
+  assert(absl::ascii_isxdigit(static_cast<unsigned char>(c)));
+  unsigned int x = static_cast<unsigned char>(c);
   if (x > '9') {
     x += 9;
   }
@@ -121,27 +121,29 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
         case '7': {
           // octal digit: 1 to 3 digits
           const char* octal_start = p;
-          unsigned int ch = *p - '0';
-          if (p < last_byte && is_octal_digit(p[1])) ch = ch * 8 + *++p - '0';
+          unsigned int ch = static_cast<unsigned int>(*p - '0');  // digit 1
           if (p < last_byte && is_octal_digit(p[1]))
-            ch = ch * 8 + *++p - '0';      // now points at last digit
+            ch = ch * 8 + static_cast<unsigned int>(*++p - '0');  // digit 2
+          if (p < last_byte && is_octal_digit(p[1]))
+            ch = ch * 8 + static_cast<unsigned int>(*++p - '0');  // digit 3
           if (ch > 0xff) {
             if (error) {
               *error = "Value of \\" +
-                       std::string(octal_start, p + 1 - octal_start) +
+                       std::string(octal_start,
+                                   static_cast<size_t>(p + 1 - octal_start)) +
                        " exceeds 0xff";
             }
             return false;
           }
           if ((ch == 0) && leave_nulls_escaped) {
             // Copy the escape sequence for the null character
-            const ptrdiff_t octal_size = p + 1 - octal_start;
+            const size_t octal_size = static_cast<size_t>(p + 1 - octal_start);
             *d++ = '\\';
             memmove(d, octal_start, octal_size);
             d += octal_size;
             break;
           }
-          *d++ = ch;
+          *d++ = static_cast<char>(ch);
           break;
         }
         case 'x':
@@ -149,32 +151,34 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
           if (p >= last_byte) {
             if (error) *error = "String cannot end with \\x";
             return false;
-          } else if (!absl::ascii_isxdigit(p[1])) {
+          } else if (!absl::ascii_isxdigit(static_cast<unsigned char>(p[1]))) {
             if (error) *error = "\\x cannot be followed by a non-hex digit";
             return false;
           }
           unsigned int ch = 0;
           const char* hex_start = p;
-          while (p < last_byte && absl::ascii_isxdigit(p[1]))
+          while (p < last_byte &&
+                 absl::ascii_isxdigit(static_cast<unsigned char>(p[1])))
             // Arbitrarily many hex digits
             ch = (ch << 4) + hex_digit_to_int(*++p);
           if (ch > 0xFF) {
             if (error) {
               *error = "Value of \\" +
-                       std::string(hex_start, p + 1 - hex_start) +
+                       std::string(hex_start,
+                                   static_cast<size_t>(p + 1 - hex_start)) +
                        " exceeds 0xff";
             }
             return false;
           }
           if ((ch == 0) && leave_nulls_escaped) {
             // Copy the escape sequence for the null character
-            const ptrdiff_t hex_size = p + 1 - hex_start;
+            const size_t hex_size = static_cast<size_t>(p + 1 - hex_start);
             *d++ = '\\';
             memmove(d, hex_start, hex_size);
             d += hex_size;
             break;
           }
-          *d++ = ch;
+          *d++ = static_cast<char>(ch);
           break;
         }
         case 'u': {
@@ -184,18 +188,20 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
           if (p + 4 >= end) {
             if (error) {
               *error = "\\u must be followed by 4 hex digits: \\" +
-                       std::string(hex_start, p + 1 - hex_start);
+                       std::string(hex_start,
+                                   static_cast<size_t>(p + 1 - hex_start));
             }
             return false;
           }
           for (int i = 0; i < 4; ++i) {
             // Look one char ahead.
-            if (absl::ascii_isxdigit(p[1])) {
+            if (absl::ascii_isxdigit(static_cast<unsigned char>(p[1]))) {
               rune = (rune << 4) + hex_digit_to_int(*++p);  // Advance p.
             } else {
               if (error) {
                 *error = "\\u must be followed by 4 hex digits: \\" +
-                         std::string(hex_start, p + 1 - hex_start);
+                         std::string(hex_start,
+                                     static_cast<size_t>(p + 1 - hex_start));
               }
               return false;
             }
@@ -220,20 +226,22 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
           if (p + 8 >= end) {
             if (error) {
               *error = "\\U must be followed by 8 hex digits: \\" +
-                       std::string(hex_start, p + 1 - hex_start);
+                       std::string(hex_start,
+                                   static_cast<size_t>(p + 1 - hex_start));
             }
             return false;
           }
           for (int i = 0; i < 8; ++i) {
             // Look one char ahead.
-            if (absl::ascii_isxdigit(p[1])) {
+            if (absl::ascii_isxdigit(static_cast<unsigned char>(p[1]))) {
               // Don't change rune until we're sure this
               // is within the Unicode limit, but do advance p.
               uint32_t newrune = (rune << 4) + hex_digit_to_int(*++p);
               if (newrune > 0x10FFFF) {
                 if (error) {
                   *error = "Value of \\" +
-                           std::string(hex_start, p + 1 - hex_start) +
+                           std::string(hex_start,
+                                       static_cast<size_t>(p + 1 - hex_start)) +
                            " exceeds Unicode limit (0x10FFFF)";
                 }
                 return false;
@@ -243,7 +251,8 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
             } else {
               if (error) {
                 *error = "\\U must be followed by 8 hex digits: \\" +
-                         std::string(hex_start, p + 1 - hex_start);
+                         std::string(hex_start,
+                                     static_cast<size_t>(p + 1 - hex_start));
               }
               return false;
             }
@@ -291,7 +300,7 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
                          error)) {
     return false;
   }
-  dest->erase(dest_size);
+  dest->erase(static_cast<size_t>(dest_size));
   return true;
 }
 
@@ -311,7 +320,7 @@ std::string CEscapeInternal(absl::string_view src, bool use_hex,
   std::string dest;
   bool last_hex_escape = false;  // true if last output char was \xNN.
 
-  for (unsigned char c : src) {
+  for (char c : src) {
     bool is_hex_escape = false;
     switch (c) {
       case '\n': dest.append("\\" "n"); break;
@@ -320,28 +329,30 @@ std::string CEscapeInternal(absl::string_view src, bool use_hex,
       case '\"': dest.append("\\" "\""); break;
       case '\'': dest.append("\\" "'"); break;
       case '\\': dest.append("\\" "\\"); break;
-      default:
+      default: {
         // Note that if we emit \xNN and the src character after that is a hex
         // digit then that digit must be escaped too to prevent it being
         // interpreted as part of the character code by C.
-        if ((!utf8_safe || c < 0x80) &&
-            (!absl::ascii_isprint(c) ||
-             (last_hex_escape && absl::ascii_isxdigit(c)))) {
+        const unsigned char uc = static_cast<unsigned char>(c);
+        if ((!utf8_safe || uc < 0x80) &&
+            (!absl::ascii_isprint(uc) ||
+             (last_hex_escape && absl::ascii_isxdigit(uc)))) {
           if (use_hex) {
             dest.append("\\" "x");
-            dest.push_back(numbers_internal::kHexChar[c / 16]);
-            dest.push_back(numbers_internal::kHexChar[c % 16]);
+            dest.push_back(numbers_internal::kHexChar[uc / 16]);
+            dest.push_back(numbers_internal::kHexChar[uc % 16]);
             is_hex_escape = true;
           } else {
             dest.append("\\");
-            dest.push_back(numbers_internal::kHexChar[c / 64]);
-            dest.push_back(numbers_internal::kHexChar[(c % 64) / 8]);
-            dest.push_back(numbers_internal::kHexChar[c % 8]);
+            dest.push_back(numbers_internal::kHexChar[uc / 64]);
+            dest.push_back(numbers_internal::kHexChar[(uc % 64) / 8]);
+            dest.push_back(numbers_internal::kHexChar[uc % 8]);
           }
         } else {
           dest.push_back(c);
           break;
         }
+      }
     }
     last_hex_escape = is_hex_escape;
   }
@@ -350,7 +361,7 @@ std::string CEscapeInternal(absl::string_view src, bool use_hex,
 }
 
 /* clang-format off */
-constexpr char c_escaped_len[256] = {
+constexpr unsigned char c_escaped_len[256] = {
     4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 4, 4, 2, 4, 4,  // \t, \n, \r
     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
     1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1,  // ", '
@@ -375,7 +386,8 @@ constexpr char c_escaped_len[256] = {
 // that UTF-8 bytes are not handled specially.
 inline size_t CEscapedLength(absl::string_view src) {
   size_t escaped_len = 0;
-  for (unsigned char c : src) escaped_len += c_escaped_len[c];
+  for (char c : src)
+    escaped_len += c_escaped_len[static_cast<unsigned char>(c)];
   return escaped_len;
 }
 
@@ -391,8 +403,8 @@ void CEscapeAndAppendInternal(absl::string_view src, std::string* dest) {
                                                  cur_dest_len + escaped_len);
   char* append_ptr = &(*dest)[cur_dest_len];
 
-  for (unsigned char c : src) {
-    int char_len = c_escaped_len[c];
+  for (char c : src) {
+    size_t char_len = c_escaped_len[static_cast<unsigned char>(c)];
     if (char_len == 1) {
       *append_ptr++ = c;
     } else if (char_len == 2) {
@@ -424,9 +436,9 @@ void CEscapeAndAppendInternal(absl::string_view src, std::string* dest) {
       }
     } else {
       *append_ptr++ = '\\';
-      *append_ptr++ = '0' + c / 64;
-      *append_ptr++ = '0' + (c % 64) / 8;
-      *append_ptr++ = '0' + c % 8;
+      *append_ptr++ = '0' + static_cast<unsigned char>(c) / 64;
+      *append_ptr++ = '0' + (static_cast<unsigned char>(c) % 64) / 8;
+      *append_ptr++ = '0' + static_cast<unsigned char>(c) % 8;
     }
   }
 }
@@ -440,7 +452,7 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
   size_t destidx = 0;
   int decode = 0;
   int state = 0;
-  unsigned int ch = 0;
+  unsigned char ch = 0;
   unsigned int temp = 0;
 
   // If "char" is signed by default, using *src as an array index results in
@@ -500,13 +512,13 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
         // how to handle those cases.
 
         GET_INPUT(first, 4);
-        temp = decode;
+        temp = static_cast<unsigned char>(decode);
         GET_INPUT(second, 3);
-        temp = (temp << 6) | decode;
+        temp = (temp << 6) | static_cast<unsigned char>(decode);
         GET_INPUT(third, 2);
-        temp = (temp << 6) | decode;
+        temp = (temp << 6) | static_cast<unsigned char>(decode);
         GET_INPUT(fourth, 1);
-        temp = (temp << 6) | decode;
+        temp = (temp << 6) | static_cast<unsigned char>(decode);
       } else {
         // We really did have four good data bytes, so advance four
         // characters in the string.
@@ -518,11 +530,11 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
       // temp has 24 bits of input, so write that out as three bytes.
 
       if (destidx + 3 > szdest) return false;
-      dest[destidx + 2] = temp;
+      dest[destidx + 2] = static_cast<char>(temp);
       temp >>= 8;
-      dest[destidx + 1] = temp;
+      dest[destidx + 1] = static_cast<char>(temp);
       temp >>= 8;
-      dest[destidx] = temp;
+      dest[destidx] = static_cast<char>(temp);
       destidx += 3;
     }
   } else {
@@ -583,18 +595,18 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
       }
 
       // Each input character gives us six bits of output.
-      temp = (temp << 6) | decode;
+      temp = (temp << 6) | static_cast<unsigned char>(decode);
       ++state;
       if (state == 4) {
         // If we've accumulated 24 bits of output, write that out as
         // three bytes.
         if (dest) {
           if (destidx + 3 > szdest) return false;
-          dest[destidx + 2] = temp;
+          dest[destidx + 2] = static_cast<char>(temp);
           temp >>= 8;
-          dest[destidx + 1] = temp;
+          dest[destidx + 1] = static_cast<char>(temp);
           temp >>= 8;
-          dest[destidx] = temp;
+          dest[destidx] = static_cast<char>(temp);
         }
         destidx += 3;
         state = 0;
@@ -619,7 +631,7 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
       if (dest) {
         if (destidx + 1 > szdest) return false;
         temp >>= 4;
-        dest[destidx] = temp;
+        dest[destidx] = static_cast<char>(temp);
       }
       ++destidx;
       expected_equals = 2;
@@ -630,9 +642,9 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
       if (dest) {
         if (destidx + 2 > szdest) return false;
         temp >>= 2;
-        dest[destidx + 1] = temp;
+        dest[destidx + 1] = static_cast<char>(temp);
         temp >>= 8;
-        dest[destidx] = temp;
+        dest[destidx] = static_cast<char>(temp);
       }
       destidx += 2;
       expected_equals = 1;
@@ -773,7 +785,8 @@ bool Base64UnescapeInternal(const char* src, size_t slen, String* dest,
                             const signed char* unbase64) {
   // Determine the size of the output string.  Base64 encodes every 3 bytes into
   // 4 characters.  any leftover chars are added directly for good measure.
-  // This is documented in the base64 RFC: http://tools.ietf.org/html/rfc3548
+  // This is documented in the base64 RFC:
+  // https://datatracker.ietf.org/doc/html/rfc3548
   const size_t dest_len = 3 * (slen / 4) + (slen % 4);
 
   strings_internal::STLStringResizeUninitialized(dest, dest_len);
@@ -821,9 +834,9 @@ constexpr char kHexValueLenient[256] = {
 // or a string.  This works because we use the [] operator to access
 // individual characters at a time.
 template <typename T>
-void HexStringToBytesInternal(const char* from, T to, ptrdiff_t num) {
-  for (int i = 0; i < num; i++) {
-    to[i] = (kHexValueLenient[from[i * 2] & 0xFF] << 4) +
+void HexStringToBytesInternal(const char* from, T to, size_t num) {
+  for (size_t i = 0; i < num; i++) {
+    to[i] = static_cast<char>(kHexValueLenient[from[i * 2] & 0xFF] << 4) +
             (kHexValueLenient[from[i * 2 + 1] & 0xFF]);
   }
 }
@@ -831,7 +844,7 @@ void HexStringToBytesInternal(const char* from, T to, ptrdiff_t num) {
 // This is a templated function so that T can be either a char* or a
 // std::string.
 template <typename T>
-void BytesToHexStringInternal(const unsigned char* src, T dest, ptrdiff_t num) {
+void BytesToHexStringInternal(const unsigned char* src, T dest, size_t num) {
   auto dest_ptr = &dest[0];
   for (auto src_ptr = src; src_ptr != (src + num); ++src_ptr, dest_ptr += 2) {
     const char* hex_p = &numbers_internal::kHexTable[*src_ptr * 2];
@@ -876,8 +889,8 @@ std::string Utf8SafeCHexEscape(absl::string_view src) {
 // WebSafeBase64Escape() - Google's variation of base64 encoder
 //
 // Check out
-// http://tools.ietf.org/html/rfc2045 for formal description, but what we
-// care about is that...
+// https://datatracker.ietf.org/doc/html/rfc2045 for formal description, but
+// what we care about is that...
 //   Take the encoded stuff in groups of 4 characters and turn each
 //   character into a code 0 to 63 thus:
 //           A-Z map to 0 to 25
diff --git a/third_party/abseil-cpp/absl/strings/escaping.h b/third_party/abseil-cpp/absl/strings/escaping.h
index f5ca26c5da..aa6d17508c 100644
--- a/third_party/abseil-cpp/absl/strings/escaping.h
+++ b/third_party/abseil-cpp/absl/strings/escaping.h
@@ -122,6 +122,8 @@ std::string Utf8SafeCHexEscape(absl::string_view src);
 // Converts a `src` string encoded in Base64 to its binary equivalent, writing
 // it to a `dest` buffer, returning `true` on success. If `src` contains invalid
 // characters, `dest` is cleared and returns `false`.
+// Padding is optional. If padding is included, it must be correct. In the
+// padding, '=' and '.' are treated identically.
 bool Base64Unescape(absl::string_view src, std::string* dest);
 
 // WebSafeBase64Unescape()
@@ -129,6 +131,8 @@ bool Base64Unescape(absl::string_view src, std::string* dest);
 // Converts a `src` string encoded in Base64 to its binary equivalent, writing
 // it to a `dest` buffer, but using '-' instead of '+', and '_' instead of '/'.
 // If `src` contains invalid characters, `dest` is cleared and returns `false`.
+// Padding is optional. If padding is included, it must be correct. In the
+// padding, '=' and '.' are treated identically.
 bool WebSafeBase64Unescape(absl::string_view src, std::string* dest);
 
 // Base64Escape()
diff --git a/third_party/abseil-cpp/absl/strings/escaping_test.cc b/third_party/abseil-cpp/absl/strings/escaping_test.cc
index 45671a0ed5..44ffcba7e3 100644
--- a/third_party/abseil-cpp/absl/strings/escaping_test.cc
+++ b/third_party/abseil-cpp/absl/strings/escaping_test.cc
@@ -617,6 +617,48 @@ TEST(Base64, EscapeAndUnescape) {
   TestEscapeAndUnescape<std::string>();
 }
 
+TEST(Base64, Padding) {
+  // Padding is optional.
+  // '.' is an acceptable padding character, just like '='.
+  std::initializer_list<absl::string_view> good_padding = {
+    "YQ",
+    "YQ==",
+    "YQ=.",
+    "YQ.=",
+    "YQ..",
+  };
+  for (absl::string_view b64 : good_padding) {
+    std::string decoded;
+    EXPECT_TRUE(absl::Base64Unescape(b64, &decoded));
+    EXPECT_EQ(decoded, "a");
+    std::string websafe_decoded;
+    EXPECT_TRUE(absl::WebSafeBase64Unescape(b64, &websafe_decoded));
+    EXPECT_EQ(websafe_decoded, "a");
+  }
+  std::initializer_list<absl::string_view> bad_padding = {
+    "YQ=",
+    "YQ.",
+    "YQ===",
+    "YQ==.",
+    "YQ=.=",
+    "YQ=..",
+    "YQ.==",
+    "YQ.=.",
+    "YQ..=",
+    "YQ...",
+    "YQ====",
+    "YQ....",
+    "YQ=====",
+    "YQ.....",
+  };
+  for (absl::string_view b64 : bad_padding) {
+    std::string decoded;
+    EXPECT_FALSE(absl::Base64Unescape(b64, &decoded));
+    std::string websafe_decoded;
+    EXPECT_FALSE(absl::WebSafeBase64Unescape(b64, &websafe_decoded));
+  }
+}
+
 TEST(Base64, DISABLED_HugeData) {
   const size_t kSize = size_t(3) * 1000 * 1000 * 1000;
   static_assert(kSize % 3 == 0, "kSize must be divisible by 3");
diff --git a/third_party/abseil-cpp/absl/strings/internal/char_map.h b/third_party/abseil-cpp/absl/strings/internal/char_map.h
index 61484de0b7..5aabc1fc64 100644
--- a/third_party/abseil-cpp/absl/strings/internal/char_map.h
+++ b/third_party/abseil-cpp/absl/strings/internal/char_map.h
@@ -103,10 +103,9 @@ class Charmap {
   constexpr Charmap(uint64_t b0, uint64_t b1, uint64_t b2, uint64_t b3)
       : m_{b0, b1, b2, b3} {}
 
-  static constexpr uint64_t RangeForWord(unsigned char lo, unsigned char hi,
-                                         uint64_t word) {
-    return OpenRangeFromZeroForWord(hi + 1, word) &
-           ~OpenRangeFromZeroForWord(lo, word);
+  static constexpr uint64_t RangeForWord(char lo, char hi, uint64_t word) {
+    return OpenRangeFromZeroForWord(static_cast<unsigned char>(hi) + 1, word) &
+           ~OpenRangeFromZeroForWord(static_cast<unsigned char>(lo), word);
   }
 
   // All the chars in the specified word of the range [0, upper).
@@ -119,13 +118,16 @@ class Charmap {
                      : (~static_cast<uint64_t>(0) >> (64 - upper % 64));
   }
 
-  static constexpr uint64_t CharMaskForWord(unsigned char x, uint64_t word) {
-    return (x / 64 == word) ? (static_cast<uint64_t>(1) << (x % 64)) : 0;
+  static constexpr uint64_t CharMaskForWord(char x, uint64_t word) {
+    const auto unsigned_x = static_cast<unsigned char>(x);
+    return (unsigned_x / 64 == word)
+               ? (static_cast<uint64_t>(1) << (unsigned_x % 64))
+               : 0;
   }
 
- private:
-  void SetChar(unsigned char c) {
-    m_[c / 64] |= static_cast<uint64_t>(1) << (c % 64);
+  void SetChar(char c) {
+    const auto unsigned_c = static_cast<unsigned char>(c);
+    m_[unsigned_c / 64] |= static_cast<uint64_t>(1) << (unsigned_c % 64);
   }
 
   uint64_t m_[4];
diff --git a/third_party/abseil-cpp/absl/strings/internal/charconv_bigint.cc b/third_party/abseil-cpp/absl/strings/internal/charconv_bigint.cc
index ebf8c0791a..282b639eb2 100644
--- a/third_party/abseil-cpp/absl/strings/internal/charconv_bigint.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/charconv_bigint.cc
@@ -242,7 +242,7 @@ int BigUnsigned<max_words>::ReadDigits(const char* begin, const char* end,
       // decimal exponent to compensate.
       --exponent_adjust;
     }
-    int digit = (*begin - '0');
+    char digit = (*begin - '0');
     --significant_digits;
     if (significant_digits == 0 && std::next(begin) != end &&
         (digit == 0 || digit == 5)) {
@@ -255,7 +255,7 @@ int BigUnsigned<max_words>::ReadDigits(const char* begin, const char* end,
       // 500000...000000000001 to correctly round up, rather than to nearest.
       ++digit;
     }
-    queued = 10 * queued + digit;
+    queued = 10 * queued + static_cast<uint32_t>(digit);
     ++digits_queued;
     if (digits_queued == kMaxSmallPowerOfTen) {
       MultiplyBy(kTenToNth[kMaxSmallPowerOfTen]);
@@ -341,8 +341,8 @@ std::string BigUnsigned<max_words>::ToString() const {
   std::string result;
   // Build result in reverse order
   while (copy.size() > 0) {
-    int next_digit = copy.DivMod<10>();
-    result.push_back('0' + next_digit);
+    uint32_t next_digit = copy.DivMod<10>();
+    result.push_back('0' + static_cast<char>(next_digit));
   }
   if (result.empty()) {
     result.push_back('0');
diff --git a/third_party/abseil-cpp/absl/strings/internal/charconv_parse.cc b/third_party/abseil-cpp/absl/strings/internal/charconv_parse.cc
index d29acaf462..98823def83 100644
--- a/third_party/abseil-cpp/absl/strings/internal/charconv_parse.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/charconv_parse.cc
@@ -190,11 +190,11 @@ bool IsDigit<16>(char ch) {
 
 template <>
 unsigned ToDigit<10>(char ch) {
-  return ch - '0';
+  return static_cast<unsigned>(ch - '0');
 }
 template <>
 unsigned ToDigit<16>(char ch) {
-  return kAsciiToInt[static_cast<unsigned char>(ch)];
+  return static_cast<unsigned>(kAsciiToInt[static_cast<unsigned char>(ch)]);
 }
 
 template <>
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_data_edge.h b/third_party/abseil-cpp/absl/strings/internal/cord_data_edge.h
new file mode 100644
index 0000000000..e18b33e1b0
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_data_edge.h
@@ -0,0 +1,63 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_STRINGS_INTERNAL_CORD_DATA_EDGE_H_
+#define ABSL_STRINGS_INTERNAL_CORD_DATA_EDGE_H_
+
+#include <cassert>
+#include <cstddef>
+
+#include "absl/base/config.h"
+#include "absl/strings/internal/cord_internal.h"
+#include "absl/strings/internal/cord_rep_flat.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+
+// Returns true if the provided rep is a FLAT, EXTERNAL or a SUBSTRING node
+// holding a FLAT or EXTERNAL child rep. Requires `rep != nullptr`.
+inline bool IsDataEdge(const CordRep* edge) {
+  assert(edge != nullptr);
+
+  // The fast path is that `edge` is an EXTERNAL or FLAT node, making the below
+  // if a single, well predicted branch. We then repeat the FLAT or EXTERNAL
+  // check in the slow path of the SUBSTRING check to optimize for the hot path.
+  if (edge->tag == EXTERNAL || edge->tag >= FLAT) return true;
+  if (edge->tag == SUBSTRING) edge = edge->substring()->child;
+  return edge->tag == EXTERNAL || edge->tag >= FLAT;
+}
+
+// Returns the `absl::string_view` data reference for the provided data edge.
+// Requires 'IsDataEdge(edge) == true`.
+inline absl::string_view EdgeData(const CordRep* edge) {
+  assert(IsDataEdge(edge));
+
+  size_t offset = 0;
+  const size_t length = edge->length;
+  if (edge->IsSubstring()) {
+    offset = edge->substring()->start;
+    edge = edge->substring()->child;
+  }
+  return edge->tag >= FLAT
+             ? absl::string_view{edge->flat()->Data() + offset, length}
+             : absl::string_view{edge->external()->base + offset, length};
+}
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_INTERNAL_CORD_DATA_EDGE_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_data_edge_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_data_edge_test.cc
new file mode 100644
index 0000000000..8fce3bc6a9
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_data_edge_test.cc
@@ -0,0 +1,130 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/cord_data_edge.h"
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/strings/internal/cord_internal.h"
+#include "absl/strings/internal/cord_rep_test_util.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+namespace {
+
+using ::absl::cordrep_testing::MakeExternal;
+using ::absl::cordrep_testing::MakeFlat;
+using ::absl::cordrep_testing::MakeSubstring;
+
+TEST(CordDataEdgeTest, IsDataEdgeOnFlat) {
+  CordRep* rep = MakeFlat("Lorem ipsum dolor sit amet, consectetur ...");
+  EXPECT_TRUE(IsDataEdge(rep));
+  CordRep::Unref(rep);
+}
+
+TEST(CordDataEdgeTest, IsDataEdgeOnExternal) {
+  CordRep* rep = MakeExternal("Lorem ipsum dolor sit amet, consectetur ...");
+  EXPECT_TRUE(IsDataEdge(rep));
+  CordRep::Unref(rep);
+}
+
+TEST(CordDataEdgeTest, IsDataEdgeOnSubstringOfFlat) {
+  CordRep* rep = MakeFlat("Lorem ipsum dolor sit amet, consectetur ...");
+  CordRep* substr = MakeSubstring(1, 20, rep);
+  EXPECT_TRUE(IsDataEdge(substr));
+  CordRep::Unref(substr);
+}
+
+TEST(CordDataEdgeTest, IsDataEdgeOnSubstringOfExternal) {
+  CordRep* rep = MakeExternal("Lorem ipsum dolor sit amet, consectetur ...");
+  CordRep* substr = MakeSubstring(1, 20, rep);
+  EXPECT_TRUE(IsDataEdge(substr));
+  CordRep::Unref(substr);
+}
+
+TEST(CordDataEdgeTest, IsDataEdgeOnBtree) {
+  CordRep* rep = MakeFlat("Lorem ipsum dolor sit amet, consectetur ...");
+  CordRepBtree* tree = CordRepBtree::New(rep);
+  EXPECT_FALSE(IsDataEdge(tree));
+  CordRep::Unref(tree);
+}
+
+TEST(CordDataEdgeTest, IsDataEdgeOnBadSubstr) {
+  CordRep* rep = MakeFlat("Lorem ipsum dolor sit amet, consectetur ...");
+  CordRep* substr = MakeSubstring(1, 18, MakeSubstring(1, 20, rep));
+  EXPECT_FALSE(IsDataEdge(substr));
+  CordRep::Unref(substr);
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnFlat) {
+  absl::string_view value = "Lorem ipsum dolor sit amet, consectetur ...";
+  CordRep* rep = MakeFlat(value);
+  EXPECT_EQ(EdgeData(rep), value);
+  CordRep::Unref(rep);
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnExternal) {
+  absl::string_view value = "Lorem ipsum dolor sit amet, consectetur ...";
+  CordRep* rep = MakeExternal(value);
+  EXPECT_EQ(EdgeData(rep), value);
+  CordRep::Unref(rep);
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnSubstringOfFlat) {
+  absl::string_view value = "Lorem ipsum dolor sit amet, consectetur ...";
+  CordRep* rep = MakeFlat(value);
+  CordRep* substr = MakeSubstring(1, 20, rep);
+  EXPECT_EQ(EdgeData(substr), value.substr(1, 20));
+  CordRep::Unref(substr);
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnSubstringOfExternal) {
+  absl::string_view value = "Lorem ipsum dolor sit amet, consectetur ...";
+  CordRep* rep = MakeExternal(value);
+  CordRep* substr = MakeSubstring(1, 20, rep);
+  EXPECT_EQ(EdgeData(substr), value.substr(1, 20));
+  CordRep::Unref(substr);
+}
+
+#if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
+
+TEST(CordDataEdgeTest, IsDataEdgeOnNullPtr) {
+  EXPECT_DEATH(IsDataEdge(nullptr), ".*");
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnNullPtr) {
+  EXPECT_DEATH(EdgeData(nullptr), ".*");
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnBtree) {
+  CordRep* rep = MakeFlat("Lorem ipsum dolor sit amet, consectetur ...");
+  CordRepBtree* tree = CordRepBtree::New(rep);
+  EXPECT_DEATH(EdgeData(tree), ".*");
+  CordRep::Unref(tree);
+}
+
+TEST(CordDataEdgeTest, EdgeDataOnBadSubstr) {
+  CordRep* rep = MakeFlat("Lorem ipsum dolor sit amet, consectetur ...");
+  CordRep* substr = MakeSubstring(1, 18, MakeSubstring(1, 20, rep));
+  EXPECT_DEATH(EdgeData(substr), ".*");
+  CordRep::Unref(substr);
+}
+
+#endif  // GTEST_HAS_DEATH_TEST && !NDEBUG
+
+}  // namespace
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_internal.cc b/third_party/abseil-cpp/absl/strings/internal/cord_internal.cc
index 1767e6fcc5..b6b06cfa2a 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_internal.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_internal.cc
@@ -17,69 +17,57 @@
 #include <cassert>
 #include <memory>
 
+#include "absl/base/internal/raw_logging.h"
 #include "absl/container/inlined_vector.h"
 #include "absl/strings/internal/cord_rep_btree.h"
+#include "absl/strings/internal/cord_rep_crc.h"
 #include "absl/strings/internal/cord_rep_flat.h"
 #include "absl/strings/internal/cord_rep_ring.h"
+#include "absl/strings/str_cat.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace cord_internal {
 
-ABSL_CONST_INIT std::atomic<bool> cord_btree_enabled(kCordEnableBtreeDefault);
 ABSL_CONST_INIT std::atomic<bool> cord_ring_buffer_enabled(
     kCordEnableRingBufferDefault);
 ABSL_CONST_INIT std::atomic<bool> shallow_subcords_enabled(
     kCordShallowSubcordsDefault);
 ABSL_CONST_INIT std::atomic<bool> cord_btree_exhaustive_validation(false);
 
+void LogFatalNodeType(CordRep* rep) {
+  ABSL_INTERNAL_LOG(FATAL, absl::StrCat("Unexpected node type: ",
+                                        static_cast<int>(rep->tag)));
+}
+
 void CordRep::Destroy(CordRep* rep) {
   assert(rep != nullptr);
 
-  absl::InlinedVector<CordRep*, Constants::kInlinedVectorSize> pending;
   while (true) {
     assert(!rep->refcount.IsImmortal());
-    if (rep->tag == CONCAT) {
-      CordRepConcat* rep_concat = rep->concat();
-      CordRep* right = rep_concat->right;
-      if (!right->refcount.Decrement()) {
-        pending.push_back(right);
-      }
-      CordRep* left = rep_concat->left;
-      delete rep_concat;
-      rep = nullptr;
-      if (!left->refcount.Decrement()) {
-        rep = left;
-        continue;
-      }
-    } else if (rep->tag == BTREE) {
+    if (rep->tag == BTREE) {
       CordRepBtree::Destroy(rep->btree());
-      rep = nullptr;
+      return;
     } else if (rep->tag == RING) {
       CordRepRing::Destroy(rep->ring());
-      rep = nullptr;
+      return;
     } else if (rep->tag == EXTERNAL) {
       CordRepExternal::Delete(rep);
-      rep = nullptr;
+      return;
     } else if (rep->tag == SUBSTRING) {
       CordRepSubstring* rep_substring = rep->substring();
-      CordRep* child = rep_substring->child;
+      rep = rep_substring->child;
       delete rep_substring;
-      rep = nullptr;
-      if (!child->refcount.Decrement()) {
-        rep = child;
-        continue;
+      if (rep->refcount.Decrement()) {
+        return;
       }
+    } else if (rep->tag == CRC) {
+      CordRepCrc::Destroy(rep->crc());
+      return;
     } else {
+      assert(rep->IsFlat());
       CordRepFlat::Delete(rep);
-      rep = nullptr;
-    }
-
-    if (!pending.empty()) {
-      rep = pending.back();
-      pending.pop_back();
-    } else {
-      break;
+      return;
     }
   }
 }
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_internal.h b/third_party/abseil-cpp/absl/strings/internal/cord_internal.h
index bfe5564e46..fcca3a28cd 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_internal.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_internal.h
@@ -21,6 +21,7 @@
 #include <cstdint>
 #include <type_traits>
 
+#include "absl/base/attributes.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/endian.h"
 #include "absl/base/internal/invoke.h"
@@ -33,16 +34,27 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace cord_internal {
 
+// The overhead of a vtable is too much for Cord, so we roll our own subclasses
+// using only a single byte to differentiate classes from each other - the "tag"
+// byte.  Define the subclasses first so we can provide downcasting helper
+// functions in the base class.
+struct CordRep;
+struct CordRepConcat;
+struct CordRepExternal;
+struct CordRepFlat;
+struct CordRepSubstring;
+struct CordRepCrc;
+class CordRepRing;
+class CordRepBtree;
+
 class CordzInfo;
 
 // Default feature enable states for cord ring buffers
 enum CordFeatureDefaults {
-  kCordEnableBtreeDefault = true,
   kCordEnableRingBufferDefault = false,
   kCordShallowSubcordsDefault = false
 };
 
-extern std::atomic<bool> cord_btree_enabled;
 extern std::atomic<bool> cord_ring_buffer_enabled;
 extern std::atomic<bool> shallow_subcords_enabled;
 
@@ -52,10 +64,6 @@ extern std::atomic<bool> shallow_subcords_enabled;
 // O(n^2) complexity as recursive / full tree validation is O(n).
 extern std::atomic<bool> cord_btree_exhaustive_validation;
 
-inline void enable_cord_btree(bool enable) {
-  cord_btree_enabled.store(enable, std::memory_order_relaxed);
-}
-
 inline void enable_cord_ring_buffer(bool enable) {
   cord_ring_buffer_enabled.store(enable, std::memory_order_relaxed);
 }
@@ -80,6 +88,9 @@ enum Constants {
   kMaxBytesToCopy = 511
 };
 
+// Emits a fatal error "Unexpected node type: xyz" and aborts the program.
+ABSL_ATTRIBUTE_NORETURN void LogFatalNodeType(CordRep* rep);
+
 // Compact class for tracking the reference count and state flags for CordRep
 // instances.  Data is stored in an atomic int32_t for compactness and speed.
 class RefcountAndFlags {
@@ -87,9 +98,6 @@ class RefcountAndFlags {
   constexpr RefcountAndFlags() : count_{kRefIncrement} {}
   struct Immortal {};
   explicit constexpr RefcountAndFlags(Immortal) : count_(kImmortalFlag) {}
-  struct WithCrc {};
-  explicit constexpr RefcountAndFlags(WithCrc)
-      : count_(kCrcFlag | kRefIncrement) {}
 
   // Increments the reference count. Imposes no memory ordering.
   inline void Increment() {
@@ -121,36 +129,19 @@ class RefcountAndFlags {
   }
 
   // Returns the current reference count using acquire semantics.
-  inline int32_t Get() const {
-    return count_.load(std::memory_order_acquire) >> kNumFlags;
-  }
-
-  // Returns true if the referenced object carries a CRC value.
-  bool HasCrc() const {
-    return (count_.load(std::memory_order_relaxed) & kCrcFlag) != 0;
+  inline size_t Get() const {
+    return static_cast<size_t>(count_.load(std::memory_order_acquire) >>
+                               kNumFlags);
   }
 
-  // Returns true iff the atomic integer is 1 and this node does not store
-  // a CRC.  When both these conditions are met, the current thread owns
-  // the reference and no other thread shares it, so its contents may be
-  // safely mutated.
-  //
-  // If the referenced item is shared, carries a CRC, or is immortal,
-  // it should not be modified in-place, and this function returns false.
-  //
-  // This call performs the memory barrier needed for the owning thread
-  // to act on the object, so that if it returns true, it may safely
-  // assume exclusive access to the object.
-  inline bool IsMutable() {
-    return (count_.load(std::memory_order_acquire)) == kRefIncrement;
-  }
-
-  // Returns whether the atomic integer is 1.  Similar to IsMutable(),
-  // but does not check for a stored CRC.  (An unshared node with a CRC is not
-  // mutable, because changing its data would invalidate the CRC.)
-  //
-  // When this returns true, there are no other references, and data sinks
-  // may safely adopt the children of the CordRep.
+  // Returns whether the atomic integer is 1.
+  // If the reference count is used in the conventional way, a
+  // reference count of 1 implies that the current thread owns the
+  // reference and no other thread shares it.
+  // This call performs the test for a reference count of one, and
+  // performs the memory barrier needed for the owning thread
+  // to act on the object, knowing that it has exclusive access to the
+  // object.  Always returns false when the immortal bit is set.
   inline bool IsOne() {
     return (count_.load(std::memory_order_acquire) & kRefcountMask) ==
            kRefIncrement;
@@ -166,51 +157,43 @@ class RefcountAndFlags {
   // used for the StringConstant constructor to avoid collecting immutable
   // constant cords.
   // kReservedFlag is reserved for future use.
-  enum {
+  enum Flags {
     kNumFlags = 2,
 
     kImmortalFlag = 0x1,
-    kCrcFlag = 0x2,
+    kReservedFlag = 0x2,
     kRefIncrement = (1 << kNumFlags),
 
     // Bitmask to use when checking refcount by equality.  This masks out
     // all flags except kImmortalFlag, which is part of the refcount for
     // purposes of equality.  (A refcount of 0 or 1 does not count as 0 or 1
     // if the immortal bit is set.)
-    kRefcountMask = ~kCrcFlag,
+    kRefcountMask = ~kReservedFlag,
   };
 
   std::atomic<int32_t> count_;
 };
 
-// The overhead of a vtable is too much for Cord, so we roll our own subclasses
-// using only a single byte to differentiate classes from each other - the "tag"
-// byte.  Define the subclasses first so we can provide downcasting helper
-// functions in the base class.
-
-struct CordRepConcat;
-struct CordRepExternal;
-struct CordRepFlat;
-struct CordRepSubstring;
-class CordRepRing;
-class CordRepBtree;
-
 // Various representations that we allow
 enum CordRepKind {
-  CONCAT = 0,
+  UNUSED_0 = 0,
   SUBSTRING = 1,
-  BTREE = 2,
-  RING = 3,
-  EXTERNAL = 4,
+  CRC = 2,
+  BTREE = 3,
+  RING = 4,
+  EXTERNAL = 5,
 
   // We have different tags for different sized flat arrays,
-  // starting with FLAT, and limited to MAX_FLAT_TAG. The 225 value is based on
-  // the current 'size to tag' encoding of 8 / 32 bytes. If a new tag is needed
-  // in the future, then 'FLAT' and 'MAX_FLAT_TAG' should be adjusted as well
-  // as the Tag <---> Size logic so that FLAT stil represents the minimum flat
-  // allocation size. (32 bytes as of now).
-  FLAT = 5,
-  MAX_FLAT_TAG = 225
+  // starting with FLAT, and limited to MAX_FLAT_TAG. The below values map to an
+  // allocated range of 32 bytes to 256 KB. The current granularity is:
+  // - 8 byte granularity for flat sizes in [32 - 512]
+  // - 64 byte granularity for flat sizes in (512 - 8KiB]
+  // - 4KiB byte granularity for flat sizes in (8KiB, 256 KiB]
+  // If a new tag is needed in the future, then 'FLAT' and 'MAX_FLAT_TAG' should
+  // be adjusted as well as the Tag <---> Size mapping logic so that FLAT still
+  // represents the minimum flat allocation size. (32 bytes as of now).
+  FLAT = 6,
+  MAX_FLAT_TAG = 248
 };
 
 // There are various locations where we want to check if some rep is a 'plain'
@@ -225,6 +208,18 @@ static_assert(EXTERNAL == RING + 1, "BTREE and EXTERNAL not consecutive");
 static_assert(FLAT == EXTERNAL + 1, "EXTERNAL and FLAT not consecutive");
 
 struct CordRep {
+  // Result from an `extract edge` operation. Contains the (possibly changed)
+  // tree node as well as the extracted edge, or {tree, nullptr} if no edge
+  // could be extracted.
+  // On success, the returned `tree` value is null if `extracted` was the only
+  // data edge inside the tree, a data edge if there were only two data edges in
+  // the tree, or the (possibly new / smaller) remaining tree with the extracted
+  // data edge removed.
+  struct ExtractResult {
+    CordRep* tree;
+    CordRep* extracted;
+  };
+
   CordRep() = default;
   constexpr CordRep(RefcountAndFlags::Immortal immortal, size_t l)
       : length(l), refcount(immortal), tag(EXTERNAL), storage{} {}
@@ -249,18 +244,18 @@ struct CordRep {
 
   // Returns true if this instance's tag matches the requested type.
   constexpr bool IsRing() const { return tag == RING; }
-  constexpr bool IsConcat() const { return tag == CONCAT; }
   constexpr bool IsSubstring() const { return tag == SUBSTRING; }
+  constexpr bool IsCrc() const { return tag == CRC; }
   constexpr bool IsExternal() const { return tag == EXTERNAL; }
   constexpr bool IsFlat() const { return tag >= FLAT; }
   constexpr bool IsBtree() const { return tag == BTREE; }
 
   inline CordRepRing* ring();
   inline const CordRepRing* ring() const;
-  inline CordRepConcat* concat();
-  inline const CordRepConcat* concat() const;
   inline CordRepSubstring* substring();
   inline const CordRepSubstring* substring() const;
+  inline CordRepCrc* crc();
+  inline const CordRepCrc* crc() const;
   inline CordRepExternal* external();
   inline const CordRepExternal* external() const;
   inline CordRepFlat* flat();
@@ -283,17 +278,23 @@ struct CordRep {
   static inline void Unref(CordRep* rep);
 };
 
-struct CordRepConcat : public CordRep {
-  CordRep* left;
-  CordRep* right;
-
-  uint8_t depth() const { return storage[0]; }
-  void set_depth(uint8_t depth) { storage[0] = depth; }
-};
-
 struct CordRepSubstring : public CordRep {
   size_t start;  // Starting offset of substring in child
   CordRep* child;
+
+  // Creates a substring on `child`, adopting a reference on `child`.
+  // Requires `child` to be either a flat or external node, and `pos` and `n` to
+  // form a non-empty partial sub range of `'child`, i.e.:
+  // `n > 0 && n < length && n + pos <= length`
+  static inline CordRepSubstring* Create(CordRep* child, size_t pos, size_t n);
+
+  // Creates a substring of `rep`. Does not adopt a reference on `rep`.
+  // Requires `IsDataEdge(rep) && n > 0 && pos + n <= rep->length`.
+  // If `n == rep->length` then this method returns `CordRep::Ref(rep)`
+  // If `rep` is a substring of a flat or external node, then this method will
+  // return a new substring of that flat or external node with `pos` adjusted
+  // with the original `start` position.
+  static inline CordRep* Substring(CordRep* rep, size_t pos, size_t n);
 };
 
 // Type for function pointer that will invoke the releaser function and also
@@ -357,6 +358,47 @@ struct CordRepExternalImpl
   }
 };
 
+inline CordRepSubstring* CordRepSubstring::Create(CordRep* child, size_t pos,
+                                                  size_t n) {
+  assert(child != nullptr);
+  assert(n > 0);
+  assert(n < child->length);
+  assert(pos < child->length);
+  assert(n <= child->length - pos);
+
+  // TODO(b/217376272): Harden internal logic.
+  // Move to strategical places inside the Cord logic and make this an assert.
+  if (ABSL_PREDICT_FALSE(!(child->IsExternal() || child->IsFlat()))) {
+    LogFatalNodeType(child);
+  }
+
+  CordRepSubstring* rep = new CordRepSubstring();
+  rep->length = n;
+  rep->tag = SUBSTRING;
+  rep->start = pos;
+  rep->child = child;
+  return rep;
+}
+
+inline CordRep* CordRepSubstring::Substring(CordRep* rep, size_t pos,
+                                            size_t n) {
+  assert(rep != nullptr);
+  assert(n != 0);
+  assert(pos < rep->length);
+  assert(n <= rep->length - pos);
+  if (n == rep->length) return CordRep::Ref(rep);
+  if (rep->IsSubstring()) {
+    pos += rep->substring()->start;
+    rep = rep->substring()->child;
+  }
+  CordRepSubstring* substr = new CordRepSubstring();
+  substr->length = n;
+  substr->tag = SUBSTRING;
+  substr->start = pos;
+  substr->child = CordRep::Ref(rep);
+  return substr;
+}
+
 inline void CordRepExternal::Delete(CordRep* rep) {
   assert(rep != nullptr && rep->IsExternal());
   auto* rep_external = static_cast<CordRepExternal*>(rep);
@@ -370,7 +412,8 @@ struct ConstInitExternalStorage {
 };
 
 template <typename Str>
-CordRepExternal ConstInitExternalStorage<Str>::value(Str::value);
+ABSL_CONST_INIT CordRepExternal
+    ConstInitExternalStorage<Str>::value(Str::value);
 
 enum {
   kMaxInline = 15,
@@ -380,8 +423,8 @@ constexpr char GetOrNull(absl::string_view data, size_t pos) {
   return pos < data.size() ? data[pos] : '\0';
 }
 
-// We store cordz_info as 64 bit pointer value in big endian format. This
-// guarantees that the least significant byte of cordz_info matches the last
+// We store cordz_info as 64 bit pointer value in little endian format. This
+// guarantees that the least significant byte of cordz_info matches the first
 // byte of the inline data representation in as_chars_, which holds the inlined
 // size or the 'is_tree' bit.
 using cordz_info_t = int64_t;
@@ -391,14 +434,14 @@ using cordz_info_t = int64_t;
 static_assert(sizeof(cordz_info_t) * 2 == kMaxInline + 1, "");
 static_assert(sizeof(cordz_info_t) >= sizeof(intptr_t), "");
 
-// BigEndianByte() creates a big endian representation of 'value', i.e.: a big
-// endian value where the last byte in the host's representation holds 'value`,
-// with all other bytes being 0.
-static constexpr cordz_info_t BigEndianByte(unsigned char value) {
+// LittleEndianByte() creates a little endian representation of 'value', i.e.:
+// a little endian value where the first byte in the host's representation
+// holds 'value`, with all other bytes being 0.
+static constexpr cordz_info_t LittleEndianByte(unsigned char value) {
 #if defined(ABSL_IS_BIG_ENDIAN)
-  return value;
-#else
   return static_cast<cordz_info_t>(value) << ((sizeof(cordz_info_t) - 1) * 8);
+#else
+  return value;
 #endif
 }
 
@@ -407,25 +450,37 @@ class InlineData {
   // DefaultInitType forces the use of the default initialization constructor.
   enum DefaultInitType { kDefaultInit };
 
-  // kNullCordzInfo holds the big endian representation of intptr_t(1)
+  // kNullCordzInfo holds the little endian representation of intptr_t(1)
   // This is the 'null' / initial value of 'cordz_info'. The null value
   // is specifically big endian 1 as with 64-bit pointers, the last
   // byte of cordz_info overlaps with the last byte holding the tag.
-  static constexpr cordz_info_t kNullCordzInfo = BigEndianByte(1);
+  static constexpr cordz_info_t kNullCordzInfo = LittleEndianByte(1);
+
+  // kTagOffset contains the offset of the control byte / tag. This constant is
+  // intended mostly for debugging purposes: do not remove this constant as it
+  // is actively inspected and used by gdb pretty printing code.
+  static constexpr size_t kTagOffset = 0;
 
   constexpr InlineData() : as_chars_{0} {}
   explicit InlineData(DefaultInitType) {}
   explicit constexpr InlineData(CordRep* rep) : as_tree_(rep) {}
   explicit constexpr InlineData(absl::string_view chars)
-      : as_chars_{
-            GetOrNull(chars, 0),  GetOrNull(chars, 1),
-            GetOrNull(chars, 2),  GetOrNull(chars, 3),
-            GetOrNull(chars, 4),  GetOrNull(chars, 5),
-            GetOrNull(chars, 6),  GetOrNull(chars, 7),
-            GetOrNull(chars, 8),  GetOrNull(chars, 9),
-            GetOrNull(chars, 10), GetOrNull(chars, 11),
-            GetOrNull(chars, 12), GetOrNull(chars, 13),
-            GetOrNull(chars, 14), static_cast<char>((chars.size() << 1))} {}
+      : as_chars_{static_cast<char>((chars.size() << 1)),
+                  GetOrNull(chars, 0),
+                  GetOrNull(chars, 1),
+                  GetOrNull(chars, 2),
+                  GetOrNull(chars, 3),
+                  GetOrNull(chars, 4),
+                  GetOrNull(chars, 5),
+                  GetOrNull(chars, 6),
+                  GetOrNull(chars, 7),
+                  GetOrNull(chars, 8),
+                  GetOrNull(chars, 9),
+                  GetOrNull(chars, 10),
+                  GetOrNull(chars, 11),
+                  GetOrNull(chars, 12),
+                  GetOrNull(chars, 13),
+                  GetOrNull(chars, 14)} {}
 
   // Returns true if the current instance is empty.
   // The 'empty value' is an inlined data value of zero length.
@@ -456,8 +511,8 @@ class InlineData {
   // Requires the current instance to hold a tree value.
   CordzInfo* cordz_info() const {
     assert(is_tree());
-    intptr_t info =
-        static_cast<intptr_t>(absl::big_endian::ToHost64(as_tree_.cordz_info));
+    intptr_t info = static_cast<intptr_t>(absl::little_endian::ToHost64(
+        static_cast<uint64_t>(as_tree_.cordz_info)));
     assert(info & 1);
     return reinterpret_cast<CordzInfo*>(info - 1);
   }
@@ -467,8 +522,9 @@ class InlineData {
   // Requires the current instance to hold a tree value.
   void set_cordz_info(CordzInfo* cordz_info) {
     assert(is_tree());
-    intptr_t info = reinterpret_cast<intptr_t>(cordz_info) | 1;
-    as_tree_.cordz_info = absl::big_endian::FromHost64(info);
+    uintptr_t info = reinterpret_cast<uintptr_t>(cordz_info) | 1;
+    as_tree_.cordz_info =
+        static_cast<cordz_info_t>(absl::little_endian::FromHost64(info));
   }
 
   // Resets the current cordz_info to null / empty.
@@ -481,7 +537,7 @@ class InlineData {
   // Requires the current instance to hold inline data.
   const char* as_chars() const {
     assert(!is_tree());
-    return as_chars_;
+    return &as_chars_[1];
   }
 
   // Returns a mutable pointer to the character data inside this instance.
@@ -499,7 +555,7 @@ class InlineData {
   //
   // It's an error to read from the returned pointer without a preceding write
   // if the current instance does not hold inline data, i.e.: is_tree() == true.
-  char* as_chars() { return as_chars_; }
+  char* as_chars() { return &as_chars_[1]; }
 
   // Returns the tree value of this value.
   // Requires the current instance to hold a tree value.
@@ -527,7 +583,7 @@ class InlineData {
   // Requires the current instance to hold inline data.
   size_t inline_size() const {
     assert(!is_tree());
-    return tag() >> 1;
+    return static_cast<size_t>(tag()) >> 1;
   }
 
   // Sets the size of the inlined character data inside this instance.
@@ -535,26 +591,42 @@ class InlineData {
   // See the documentation on 'as_chars()' for more information and examples.
   void set_inline_size(size_t size) {
     ABSL_ASSERT(size <= kMaxInline);
-    tag() = static_cast<char>(size << 1);
+    tag() = static_cast<int8_t>(size << 1);
+  }
+
+  // Compares 'this' inlined data  with rhs. The comparison is a straightforward
+  // lexicographic comparison. `Compare()` returns values as follows:
+  //
+  //   -1  'this' InlineData instance is smaller
+  //    0  the InlineData instances are equal
+  //    1  'this' InlineData instance larger
+  int Compare(const InlineData& rhs) const {
+    uint64_t x, y;
+    memcpy(&x, as_chars(), sizeof(x));
+    memcpy(&y, rhs.as_chars(), sizeof(y));
+    if (x == y) {
+      memcpy(&x, as_chars() + 7, sizeof(x));
+      memcpy(&y, rhs.as_chars() + 7, sizeof(y));
+      if (x == y) {
+        if (inline_size() == rhs.inline_size()) return 0;
+        return inline_size() < rhs.inline_size() ? -1 : 1;
+      }
+    }
+    x = absl::big_endian::FromHost64(x);
+    y = absl::big_endian::FromHost64(y);
+    return x < y ? -1 : 1;
   }
 
  private:
   // See cordz_info_t for forced alignment and size of `cordz_info` details.
   struct AsTree {
-    explicit constexpr AsTree(absl::cord_internal::CordRep* tree)
-        : rep(tree), cordz_info(kNullCordzInfo) {}
-    // This union uses up extra space so that whether rep is 32 or 64 bits,
-    // cordz_info will still start at the eighth byte, and the last
-    // byte of cordz_info will still be the last byte of InlineData.
-    union {
-      absl::cord_internal::CordRep* rep;
-      cordz_info_t unused_aligner;
-    };
-    cordz_info_t cordz_info;
+    explicit constexpr AsTree(absl::cord_internal::CordRep* tree) : rep(tree) {}
+    cordz_info_t cordz_info = kNullCordzInfo;
+    absl::cord_internal::CordRep* rep;
   };
 
-  char& tag() { return reinterpret_cast<char*>(this)[kMaxInline]; }
-  char tag() const { return reinterpret_cast<const char*>(this)[kMaxInline]; }
+  int8_t& tag() { return reinterpret_cast<int8_t*>(this)[0]; }
+  int8_t tag() const { return reinterpret_cast<const int8_t*>(this)[0]; }
 
   // If the data has length <= kMaxInline, we store it in `as_chars_`, and
   // store the size in the last char of `as_chars_` shifted left + 1.
@@ -568,16 +640,6 @@ class InlineData {
 
 static_assert(sizeof(InlineData) == kMaxInline + 1, "");
 
-inline CordRepConcat* CordRep::concat() {
-  assert(IsConcat());
-  return static_cast<CordRepConcat*>(this);
-}
-
-inline const CordRepConcat* CordRep::concat() const {
-  assert(IsConcat());
-  return static_cast<const CordRepConcat*>(this);
-}
-
 inline CordRepSubstring* CordRep::substring() {
   assert(IsSubstring());
   return static_cast<CordRepSubstring*>(this);
@@ -599,7 +661,9 @@ inline const CordRepExternal* CordRep::external() const {
 }
 
 inline CordRep* CordRep::Ref(CordRep* rep) {
-  assert(rep != nullptr);
+  // ABSL_ASSUME is a workaround for
+  // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105585
+  ABSL_ASSUME(rep != nullptr);
   rep->refcount.Increment();
   return rep;
 }
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_internal_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_internal_test.cc
deleted file mode 100644
index 0758dfef38..0000000000
--- a/third_party/abseil-cpp/absl/strings/internal/cord_internal_test.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2021 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/cord_internal.h"
-
-#include "gmock/gmock.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace cord_internal {
-
-TEST(RefcountAndFlags, NormalRefcount) {
-  for (bool expect_high_refcount : {false, true}) {
-    SCOPED_TRACE(expect_high_refcount);
-    RefcountAndFlags refcount;
-    // count = 1
-
-    EXPECT_FALSE(refcount.HasCrc());
-    EXPECT_TRUE(refcount.IsMutable());
-    EXPECT_TRUE(refcount.IsOne());
-
-    refcount.Increment();
-    // count = 2
-
-    EXPECT_FALSE(refcount.HasCrc());
-    EXPECT_FALSE(refcount.IsMutable());
-    EXPECT_FALSE(refcount.IsOne());
-
-    // Decrementing should return true, since a reference is outstanding.
-    if (expect_high_refcount) {
-      EXPECT_TRUE(refcount.DecrementExpectHighRefcount());
-    } else {
-      EXPECT_TRUE(refcount.Decrement());
-    }
-    // count = 1
-
-    EXPECT_FALSE(refcount.HasCrc());
-    EXPECT_TRUE(refcount.IsMutable());
-    EXPECT_TRUE(refcount.IsOne());
-
-    // One more decremnt will return false, as no references remain.
-    if (expect_high_refcount) {
-      EXPECT_FALSE(refcount.DecrementExpectHighRefcount());
-    } else {
-      EXPECT_FALSE(refcount.Decrement());
-    }
-  }
-}
-
-TEST(RefcountAndFlags, CrcRefcount) {
-  for (bool expect_high_refcount : {false, true}) {
-    SCOPED_TRACE(expect_high_refcount);
-    RefcountAndFlags refcount(RefcountAndFlags::WithCrc{});
-    // count = 1
-
-    // A CRC-carrying node is never mutable, but can be unshared
-    EXPECT_TRUE(refcount.HasCrc());
-    EXPECT_FALSE(refcount.IsMutable());
-    EXPECT_TRUE(refcount.IsOne());
-
-    refcount.Increment();
-    // count = 2
-
-    EXPECT_TRUE(refcount.HasCrc());
-    EXPECT_FALSE(refcount.IsMutable());
-    EXPECT_FALSE(refcount.IsOne());
-
-    // Decrementing should return true, since a reference is outstanding.
-    if (expect_high_refcount) {
-      EXPECT_TRUE(refcount.DecrementExpectHighRefcount());
-    } else {
-      EXPECT_TRUE(refcount.Decrement());
-    }
-    // count = 1
-
-    EXPECT_TRUE(refcount.HasCrc());
-    EXPECT_FALSE(refcount.IsMutable());
-    EXPECT_TRUE(refcount.IsOne());
-
-    // One more decremnt will return false, as no references remain.
-    if (expect_high_refcount) {
-      EXPECT_FALSE(refcount.DecrementExpectHighRefcount());
-    } else {
-      EXPECT_FALSE(refcount.Decrement());
-    }
-  }
-}
-
-TEST(RefcountAndFlags, ImmortalRefcount) {
-  RefcountAndFlags immortal_refcount(RefcountAndFlags::Immortal{});
-
-  for (int i = 0; i < 100; ++i) {
-    // An immortal refcount is never unshared, and decrementing never causes
-    // a collection.
-    EXPECT_FALSE(immortal_refcount.HasCrc());
-    EXPECT_FALSE(immortal_refcount.IsMutable());
-    EXPECT_FALSE(immortal_refcount.IsOne());
-    EXPECT_TRUE(immortal_refcount.Decrement());
-    EXPECT_TRUE(immortal_refcount.DecrementExpectHighRefcount());
-  }
-}
-
-}  // namespace cord_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.cc
index 4404f33a12..7ce36128eb 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.cc
@@ -17,11 +17,13 @@
 #include <cassert>
 #include <cstdint>
 #include <iostream>
+#include <ostream>
 #include <string>
 
 #include "absl/base/attributes.h"
 #include "absl/base/config.h"
 #include "absl/base/internal/raw_logging.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_consume.h"
 #include "absl/strings/internal/cord_rep_flat.h"
@@ -32,7 +34,9 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace cord_internal {
 
-constexpr size_t CordRepBtree::kMaxCapacity;  // NOLINT: needed for c++ < c++17
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr size_t CordRepBtree::kMaxCapacity;
+#endif
 
 namespace {
 
@@ -52,8 +56,10 @@ inline bool exhaustive_validation() {
 // Prints the entire tree structure or 'rep'. External callers should
 // not specify 'depth' and leave it to its default (0) value.
 // Rep may be a CordRepBtree tree, or a SUBSTRING / EXTERNAL / FLAT node.
-void DumpAll(const CordRep* rep, bool include_contents, std::ostream& stream,
-             int depth = 0) {
+void DumpAll(const CordRep* rep,
+             bool include_contents,
+             std::ostream& stream,
+             size_t depth = 0) {
   // Allow for full height trees + substring -> flat / external nodes.
   assert(depth <= CordRepBtree::kMaxDepth + 2);
   std::string sharing = const_cast<CordRep*>(rep)->refcount.IsOne()
@@ -69,7 +75,7 @@ void DumpAll(const CordRep* rep, bool include_contents, std::ostream& stream,
       // indentation and prefix / labels keeps us within roughly 80-100 wide.
       constexpr size_t kMaxDataLength = 60;
       stream << ", data = \""
-             << CordRepBtree::EdgeData(r).substr(0, kMaxDataLength)
+             << EdgeData(r).substr(0, kMaxDataLength)
              << (r->length > kMaxDataLength ? "\"..." : "\"");
     }
     stream << '\n';
@@ -119,6 +125,7 @@ CordRepSubstring* CreateSubstring(CordRep* rep, size_t offset, size_t n) {
     rep = CordRep::Ref(substring->child);
     CordRep::Unref(substring);
   }
+  assert(rep->IsExternal() || rep->IsFlat());
   CordRepSubstring* substring = new CordRepSubstring();
   substring->length = n;
   substring->tag = SUBSTRING;
@@ -149,7 +156,7 @@ inline CordRep* MakeSubstring(CordRep* rep, size_t offset) {
 CordRep* ResizeEdge(CordRep* edge, size_t length, bool is_mutable) {
   assert(length > 0);
   assert(length <= edge->length);
-  assert(CordRepBtree::IsDataEdge(edge));
+  assert(IsDataEdge(edge));
   if (length >= edge->length) return edge;
 
   if (is_mutable && (edge->tag >= FLAT || edge->tag == SUBSTRING)) {
@@ -190,24 +197,29 @@ inline void FastUnref(R* r, Fn&& fn) {
   }
 }
 
-// Deletes a leaf node data edge. Requires `rep` to be an EXTERNAL or FLAT
-// node, or a SUBSTRING of an EXTERNAL or FLAT node.
-void DeleteLeafEdge(CordRep* rep) {
-  for (;;) {
+
+void DeleteSubstring(CordRepSubstring* substring) {
+  CordRep* rep = substring->child;
+  if (!rep->refcount.Decrement()) {
     if (rep->tag >= FLAT) {
       CordRepFlat::Delete(rep->flat());
-      return;
-    }
-    if (rep->tag == EXTERNAL) {
+    } else {
+      assert(rep->tag == EXTERNAL);
       CordRepExternal::Delete(rep->external());
-      return;
     }
-    assert(rep->tag == SUBSTRING);
-    CordRepSubstring* substring = rep->substring();
-    rep = substring->child;
-    assert(rep->tag == EXTERNAL || rep->tag >= FLAT);
-    delete substring;
-    if (rep->refcount.Decrement()) return;
+  }
+  delete substring;
+}
+
+// Deletes a leaf node data edge. Requires `IsDataEdge(rep)`.
+void DeleteLeafEdge(CordRep* rep) {
+  assert(IsDataEdge(rep));
+  if (rep->tag >= FLAT) {
+    CordRepFlat::Delete(rep->flat());
+  } else if (rep->tag == EXTERNAL) {
+    CordRepExternal::Delete(rep->external());
+  } else {
+    DeleteSubstring(rep->substring());
   }
 }
 
@@ -216,8 +228,8 @@ void DeleteLeafEdge(CordRep* rep) {
 // propagate node changes up the stack.
 template <EdgeType edge_type>
 struct StackOperations {
-  // Returns true if the node at 'depth' is mutable, i.e. has a refcount
-  // of one, carries no CRC, and all of its parent nodes have a refcount of one.
+  // Returns true if the node at 'depth' is not shared, i.e. has a refcount
+  // of one and all of its parent nodes have a refcount of one.
   inline bool owned(int depth) const { return depth < share_depth; }
 
   // Returns the node at 'depth'.
@@ -228,11 +240,11 @@ struct StackOperations {
   inline CordRepBtree* BuildStack(CordRepBtree* tree, int depth) {
     assert(depth <= tree->height());
     int current_depth = 0;
-    while (current_depth < depth && tree->refcount.IsMutable()) {
+    while (current_depth < depth && tree->refcount.IsOne()) {
       stack[current_depth++] = tree;
       tree = tree->Edge(edge_type)->btree();
     }
-    share_depth = current_depth + (tree->refcount.IsMutable() ? 1 : 0);
+    share_depth = current_depth + (tree->refcount.IsOne() ? 1 : 0);
     while (current_depth < depth) {
       stack[current_depth++] = tree;
       tree = tree->Edge(edge_type)->btree();
@@ -241,17 +253,17 @@ struct StackOperations {
   }
 
   // Builds a stack with the invariant that all nodes are private owned / not
-  // shared and carry no CRC data. This is used in iterative updates where a
-  // previous propagation guaranteed all nodes have this property.
+  // shared. This is used in iterative updates where a previous propagation
+  // guaranteed all nodes are owned / private.
   inline void BuildOwnedStack(CordRepBtree* tree, int height) {
     assert(height <= CordRepBtree::kMaxHeight);
     int depth = 0;
     while (depth < height) {
-      assert(tree->refcount.IsMutable());
+      assert(tree->refcount.IsOne());
       stack[depth++] = tree;
       tree = tree->Edge(edge_type)->btree();
     }
-    assert(tree->refcount.IsMutable());
+    assert(tree->refcount.IsOne());
     share_depth = depth + 1;
   }
 
@@ -336,12 +348,12 @@ struct StackOperations {
     return Unwind</*propagate=*/true>(tree, depth, length, result);
   }
 
-  // `share_depth` contains the depth at which the nodes in the stack cannot
-  // be mutated. I.e., if the top most level is shared (i.e.:
-  // `!refcount.IsMutable()`), then `share_depth` is 0. If the 2nd node
-  // is shared (and implicitly all nodes below that) then `share_depth` is 1,
-  // etc. A `share_depth` greater than the depth of the stack indicates that
-  // none of the nodes in the stack are shared.
+  // `share_depth` contains the depth at which the nodes in the stack become
+  // shared. I.e., if the top most level is shared (i.e.: `!refcount.IsOne()`),
+  // then `share_depth` is 0. If the 2nd node is shared (and implicitly all
+  // nodes below that) then `share_depth` is 1, etc. A `share_depth` greater
+  // than the depth of the stack indicates that none of the nodes in the stack
+  // are shared.
   int share_depth;
 
   NodeStack stack;
@@ -372,19 +384,37 @@ void CordRepBtree::Dump(const CordRep* rep, std::ostream& stream) {
   Dump(rep, absl::string_view(), false, stream);
 }
 
-void CordRepBtree::DestroyLeaf(CordRepBtree* tree, size_t begin, size_t end) {
-  for (CordRep* edge : tree->Edges(begin, end)) {
-    FastUnref(edge, DeleteLeafEdge);
+template <size_t size>
+static void DestroyTree(CordRepBtree* tree) {
+  for (CordRep* node : tree->Edges()) {
+    if (node->refcount.Decrement()) continue;
+    for (CordRep* edge : node->btree()->Edges()) {
+      if (edge->refcount.Decrement()) continue;
+      if (size == 1) {
+        DeleteLeafEdge(edge);
+      } else {
+        CordRepBtree::Destroy(edge->btree());
+      }
+    }
+    CordRepBtree::Delete(node->btree());
   }
-  Delete(tree);
+  CordRepBtree::Delete(tree);
 }
 
-void CordRepBtree::DestroyNonLeaf(CordRepBtree* tree, size_t begin,
-                                  size_t end) {
-  for (CordRep* edge : tree->Edges(begin, end)) {
-    FastUnref(edge->btree(), Destroy);
+void CordRepBtree::Destroy(CordRepBtree* tree) {
+  switch (tree->height()) {
+    case 0:
+      for (CordRep* edge : tree->Edges()) {
+        if (!edge->refcount.Decrement()) {
+          DeleteLeafEdge(edge);
+        }
+      }
+      return CordRepBtree::Delete(tree);
+    case 1:
+      return DestroyTree<1>(tree);
+    default:
+      return DestroyTree<2>(tree);
   }
-  Delete(tree);
 }
 
 bool CordRepBtree::IsValid(const CordRepBtree* tree, bool shallow) {
@@ -773,7 +803,7 @@ CopyResult CordRepBtree::CopyPrefix(size_t n, bool allow_folding) {
 
 CordRep* CordRepBtree::ExtractFront(CordRepBtree* tree) {
   CordRep* front = tree->Edge(tree->begin());
-  if (tree->refcount.IsMutable()) {
+  if (tree->refcount.IsOne()) {
     Unref(tree->Edges(tree->begin() + 1, tree->end()));
     CordRepBtree::Delete(tree);
   } else {
@@ -786,7 +816,7 @@ CordRep* CordRepBtree::ExtractFront(CordRepBtree* tree) {
 CordRepBtree* CordRepBtree::ConsumeBeginTo(CordRepBtree* tree, size_t end,
                                            size_t new_length) {
   assert(end <= tree->end());
-  if (tree->refcount.IsMutable()) {
+  if (tree->refcount.IsOne()) {
     Unref(tree->Edges(end, tree->end()));
     tree->set_end(end);
     tree->length = new_length;
@@ -813,13 +843,13 @@ CordRep* CordRepBtree::RemoveSuffix(CordRepBtree* tree, size_t n) {
 
   size_t length = len - n;
   int height = tree->height();
-  bool is_mutable = tree->refcount.IsMutable();
+  bool is_mutable = tree->refcount.IsOne();
 
   // Extract all top nodes which are reduced to size = 1
   Position pos = tree->IndexOfLength(length);
   while (pos.index == tree->begin()) {
     CordRep* edge = ExtractFront(tree);
-    is_mutable &= edge->refcount.IsMutable();
+    is_mutable &= edge->refcount.IsOne();
     if (height-- == 0) return ResizeEdge(edge, length, is_mutable);
     tree = edge->btree();
     pos = tree->IndexOfLength(length);
@@ -835,8 +865,8 @@ CordRep* CordRepBtree::RemoveSuffix(CordRepBtree* tree, size_t n) {
   length = pos.n;
   while (length != edge->length) {
     // ConsumeBeginTo guarantees `tree` is a clean, privately owned copy.
-    assert(tree->refcount.IsMutable());
-    const bool edge_is_mutable = edge->refcount.IsMutable();
+    assert(tree->refcount.IsOne());
+    const bool edge_is_mutable = edge->refcount.IsOne();
 
     if (height-- == 0) {
       tree->edges_[pos.index] = ResizeEdge(edge, length, edge_is_mutable);
@@ -973,7 +1003,7 @@ char CordRepBtree::GetCharacter(size_t offset) const {
 Span<char> CordRepBtree::GetAppendBufferSlow(size_t size) {
   // The inlined version in `GetAppendBuffer()` deals with all heights <= 3.
   assert(height() >= 4);
-  assert(refcount.IsMutable());
+  assert(refcount.IsOne());
 
   // Build a stack of nodes we may potentially need to update if we find a
   // non-shared FLAT with capacity at the leaf level.
@@ -982,13 +1012,13 @@ Span<char> CordRepBtree::GetAppendBufferSlow(size_t size) {
   CordRepBtree* stack[kMaxDepth];
   for (int i = 0; i < depth; ++i) {
     node = node->Edge(kBack)->btree();
-    if (!node->refcount.IsMutable()) return {};
+    if (!node->refcount.IsOne()) return {};
     stack[i] = node;
   }
 
   // Must be a privately owned, mutable flat.
   CordRep* const edge = node->Edge(kBack);
-  if (!edge->refcount.IsMutable() || edge->tag < FLAT) return {};
+  if (!edge->refcount.IsOne() || edge->tag < FLAT) return {};
 
   // Must have capacity.
   const size_t avail = edge->flat()->Capacity() - edge->length;
@@ -1123,6 +1153,79 @@ CordRepBtree* CordRepBtree::Rebuild(CordRepBtree* tree) {
   return nullptr;
 }
 
+CordRepBtree::ExtractResult CordRepBtree::ExtractAppendBuffer(
+    CordRepBtree* tree, size_t extra_capacity) {
+  int depth = 0;
+  NodeStack stack;
+
+  // Set up default 'no success' result which is {tree, nullptr}.
+  ExtractResult result;
+  result.tree = tree;
+  result.extracted = nullptr;
+
+  // Dive down the right side of the tree, making sure no edges are shared.
+  while (tree->height() > 0) {
+    if (!tree->refcount.IsOne()) return result;
+    stack[depth++] = tree;
+    tree = tree->Edge(kBack)->btree();
+  }
+  if (!tree->refcount.IsOne()) return result;
+
+  // Validate we ended on a non shared flat.
+  CordRep* rep = tree->Edge(kBack);
+  if (!(rep->IsFlat() && rep->refcount.IsOne())) return result;
+
+  // Verify it has at least the requested extra capacity.
+  CordRepFlat* flat = rep->flat();
+  const size_t length = flat->length;
+  const size_t avail = flat->Capacity() - flat->length;
+  if (extra_capacity > avail) return result;
+
+  // Set the extracted flat in the result.
+  result.extracted = flat;
+
+  // Cascading delete all nodes that become empty.
+  while (tree->size() == 1) {
+    CordRepBtree::Delete(tree);
+    if (--depth < 0) {
+      // We consumed the entire tree: return nullptr for new tree.
+      result.tree = nullptr;
+      return result;
+    }
+    rep = tree;
+    tree = stack[depth];
+  }
+
+  // Remove the edge or cascaded up parent node.
+  tree->set_end(tree->end() - 1);
+  tree->length -= length;
+
+  // Adjust lengths up the tree.
+  while (depth > 0) {
+    tree = stack[--depth];
+    tree->length -= length;
+  }
+
+  // Remove unnecessary top nodes with size = 1. This may iterate all the way
+  // down to the leaf node in which case we simply return the remaining last
+  // edge in that node and the extracted flat.
+  while (tree->size() == 1) {
+    int height = tree->height();
+    rep = tree->Edge(kBack);
+    Delete(tree);
+    if (height == 0) {
+      // We consumed the leaf: return the sole data edge as the new tree.
+      result.tree = rep;
+      return result;
+    }
+    tree = rep->btree();
+  }
+
+  // Done: return the (new) top level node and extracted flat.
+  result.tree = tree;
+  return result;
+}
+
 }  // namespace cord_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.h
index bb38f0c3fe..eed5609e55 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree.h
@@ -22,6 +22,7 @@
 #include "absl/base/config.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/base/optimization.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_flat.h"
 #include "absl/strings/string_view.h"
@@ -94,8 +95,9 @@ class CordRepBtree : public CordRep {
   // local stack variable compared to Cord's current near 400 bytes stack use.
   // The maximum `height` value of a node is then `kMaxDepth - 1` as node height
   // values start with a value of 0 for leaf nodes.
-  static constexpr int kMaxDepth = 12;
-  static constexpr int kMaxHeight = kMaxDepth - 1;
+  static constexpr size_t kMaxDepth = 12;
+  // See comments on height() for why this is an int and not a size_t.
+  static constexpr int kMaxHeight = static_cast<int>(kMaxDepth - 1);
 
   // `Action` defines the action for unwinding changes done at the btree's leaf
   // level that need to be propagated up to the parent node(s). Each operation
@@ -163,6 +165,9 @@ class CordRepBtree : public CordRep {
   // typically after a ref_count.Decrement() on the last reference count.
   static void Destroy(CordRepBtree* tree);
 
+  // Destruction
+  static void Delete(CordRepBtree* tree) { delete tree; }
+
   // Use CordRep::Unref() as we overload for absl::Span<CordRep* const>.
   using CordRep::Unref;
 
@@ -240,11 +245,41 @@ class CordRepBtree : public CordRep {
   // length of the flat node and involved tree nodes have been increased by
   // `span.length()`. The caller is responsible for immediately assigning values
   // to all uninitialized data reference by the returned span.
-  // Requires `this->refcount.IsMutable()`: this function forces the
-  // caller to do this fast path check on the top level node, as this is the
-  // most commonly shared node of a cord tree.
+  // Requires `this->refcount.IsOne()`: this function forces the caller to do
+  // this fast path check on the top level node, as this is the most commonly
+  // shared node of a cord tree.
   Span<char> GetAppendBuffer(size_t size);
 
+  // Extracts the right-most data edge from this tree iff:
+  // - the tree and all internal edges to the right-most node are not shared.
+  // - the right-most node is a FLAT node and not shared.
+  // - the right-most node has at least the desired extra capacity.
+  //
+  // Returns {tree, nullptr} if any of the above conditions are not met.
+  // This method effectively removes data from the tree. The intent of this
+  // method is to allow applications appending small string data to use
+  // pre-existing capacity, and add the modified rep back to the tree.
+  //
+  // Simplified such code would look similar to this:
+  //   void MyTreeBuilder::Append(string_view data) {
+  //     ExtractResult result = CordRepBtree::ExtractAppendBuffer(tree_, 1);
+  //     if (CordRep* rep = result.extracted) {
+  //       size_t available = rep->Capacity() - rep->length;
+  //       size_t n = std::min(data.size(), n);
+  //       memcpy(rep->Data(), data.data(), n);
+  //       rep->length += n;
+  //       data.remove_prefix(n);
+  //       if (!result.tree->IsBtree()) {
+  //         tree_ = CordRepBtree::Create(result.tree);
+  //       }
+  //       tree_ = CordRepBtree::Append(tree_, rep);
+  //     }
+  //     ...
+  //     // Remaining edge in `result.tree`.
+  //   }
+  static ExtractResult ExtractAppendBuffer(CordRepBtree* tree,
+                                           size_t extra_capacity = 1);
+
   // Returns the `height` of the tree. The height of a tree is limited to
   // kMaxHeight. `height` is implemented as an `int` as in some places we
   // use negative (-1) values for 'data edges'.
@@ -277,13 +312,6 @@ class CordRepBtree : public CordRep {
   // Requires this instance to be a leaf node, and `index` to be valid index.
   inline absl::string_view Data(size_t index) const;
 
-  static const char* EdgeDataPtr(const CordRep* r);
-  static absl::string_view EdgeData(const CordRep* r);
-
-  // Returns true if the provided rep is a FLAT, EXTERNAL or a SUBSTRING node
-  // holding a FLAT or EXTERNAL child rep.
-  static bool IsDataEdge(const CordRep* rep);
-
   // Diagnostics: returns true if `tree` is valid and internally consistent.
   // If `shallow` is false, then the provided top level node and all child nodes
   // below it are recursively checked. If `shallow` is true, only the provided
@@ -410,12 +438,6 @@ class CordRepBtree : public CordRep {
   // Requires `offset` < length.
   Position IndexBeyond(size_t offset) const;
 
-  // Destruction
-  static void DestroyLeaf(CordRepBtree* tree, size_t begin, size_t end);
-  static void DestroyNonLeaf(CordRepBtree* tree, size_t begin, size_t end);
-  static void DestroyTree(CordRepBtree* tree, size_t begin, size_t end);
-  static void Delete(CordRepBtree* tree) { delete tree; }
-
   // Creates a new leaf node containing as much data as possible from `data`.
   // The data is added either forwards or reversed depending on `edge_type`.
   // Callers must check the length of the returned node to determine if all data
@@ -604,34 +626,11 @@ inline absl::Span<CordRep* const> CordRepBtree::Edges(size_t begin,
   return {edges_ + begin, static_cast<size_t>(end - begin)};
 }
 
-inline const char* CordRepBtree::EdgeDataPtr(const CordRep* r) {
-  assert(IsDataEdge(r));
-  size_t offset = 0;
-  if (r->tag == SUBSTRING) {
-    offset = r->substring()->start;
-    r = r->substring()->child;
-  }
-  return (r->tag >= FLAT ? r->flat()->Data() : r->external()->base) + offset;
-}
-
-inline absl::string_view CordRepBtree::EdgeData(const CordRep* r) {
-  return absl::string_view(EdgeDataPtr(r), r->length);
-}
-
 inline absl::string_view CordRepBtree::Data(size_t index) const {
   assert(height() == 0);
   return EdgeData(Edge(index));
 }
 
-inline bool CordRepBtree::IsDataEdge(const CordRep* rep) {
-  // The fast path is that `rep` is an EXTERNAL or FLAT node, making the below
-  // if a single, well predicted branch. We then repeat the FLAT or EXTERNAL
-  // check in the slow path the SUBSTRING check to optimize for the hot path.
-  if (rep->tag == EXTERNAL || rep->tag >= FLAT) return true;
-  if (rep->tag == SUBSTRING) rep = rep->substring()->child;
-  return rep->tag == EXTERNAL || rep->tag >= FLAT;
-}
-
 inline CordRepBtree* CordRepBtree::New(int height) {
   CordRepBtree* tree = new CordRepBtree;
   tree->length = 0;
@@ -659,19 +658,6 @@ inline CordRepBtree* CordRepBtree::New(CordRepBtree* front,
   return tree;
 }
 
-inline void CordRepBtree::DestroyTree(CordRepBtree* tree, size_t begin,
-                                      size_t end) {
-  if (tree->height() == 0) {
-    DestroyLeaf(tree, begin, end);
-  } else {
-    DestroyNonLeaf(tree, begin, end);
-  }
-}
-
-inline void CordRepBtree::Destroy(CordRepBtree* tree) {
-  DestroyTree(tree, tree->begin(), tree->end());
-}
-
 inline void CordRepBtree::Unref(absl::Span<CordRep* const> edges) {
   for (CordRep* edge : edges) {
     if (ABSL_PREDICT_FALSE(!edge->refcount.Decrement())) {
@@ -731,7 +717,7 @@ inline void CordRepBtree::AlignBegin() {
     // size, and then do overlapping load/store of up to 4 pointers (inlined as
     // XMM, YMM or ZMM load/store) and up to 2 pointers (XMM / YMM), which is a)
     // compact and b) not clobbering any registers.
-    ABSL_INTERNAL_ASSUME(new_end <= kMaxCapacity);
+    ABSL_ASSUME(new_end <= kMaxCapacity);
 #ifdef __clang__
 #pragma unroll 1
 #endif
@@ -749,7 +735,7 @@ inline void CordRepBtree::AlignEnd() {
     const size_t new_end = end() + delta;
     set_begin(new_begin);
     set_end(new_end);
-    ABSL_INTERNAL_ASSUME(new_end <= kMaxCapacity);
+    ABSL_ASSUME(new_end <= kMaxCapacity);
 #ifdef __clang__
 #pragma unroll 1
 #endif
@@ -849,7 +835,7 @@ inline CordRepBtree* CordRepBtree::Create(CordRep* rep) {
 }
 
 inline Span<char> CordRepBtree::GetAppendBuffer(size_t size) {
-  assert(refcount.IsMutable());
+  assert(refcount.IsOne());
   CordRepBtree* tree = this;
   const int height = this->height();
   CordRepBtree* n1 = tree;
@@ -858,21 +844,21 @@ inline Span<char> CordRepBtree::GetAppendBuffer(size_t size) {
   switch (height) {
     case 3:
       tree = tree->Edge(kBack)->btree();
-      if (!tree->refcount.IsMutable()) return {};
+      if (!tree->refcount.IsOne()) return {};
       n2 = tree;
       ABSL_FALLTHROUGH_INTENDED;
     case 2:
       tree = tree->Edge(kBack)->btree();
-      if (!tree->refcount.IsMutable()) return {};
+      if (!tree->refcount.IsOne()) return {};
       n1 = tree;
       ABSL_FALLTHROUGH_INTENDED;
     case 1:
       tree = tree->Edge(kBack)->btree();
-      if (!tree->refcount.IsMutable()) return {};
+      if (!tree->refcount.IsOne()) return {};
       ABSL_FALLTHROUGH_INTENDED;
     case 0:
       CordRep* edge = tree->Edge(kBack);
-      if (!edge->refcount.IsMutable()) return {};
+      if (!edge->refcount.IsOne()) return {};
       if (edge->tag < FLAT) return {};
       size_t avail = edge->flat()->Capacity() - edge->length;
       if (avail == 0) return {};
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.cc
index d1f9995d00..6ed20c23a7 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.cc
@@ -16,6 +16,7 @@
 
 #include <cassert>
 
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
 
@@ -39,7 +40,7 @@ inline CordRep* Substring(CordRep* rep, size_t offset, size_t n) {
   assert(n <= rep->length);
   assert(offset < rep->length);
   assert(offset <= rep->length - n);
-  assert(CordRepBtree::IsDataEdge(rep));
+  assert(IsDataEdge(rep));
 
   if (n == 0) return nullptr;
   if (n == rep->length) return CordRep::Ref(rep);
@@ -49,6 +50,7 @@ inline CordRep* Substring(CordRep* rep, size_t offset, size_t n) {
     rep = rep->substring()->child;
   }
 
+  assert(rep->IsExternal() || rep->IsFlat());
   CordRepSubstring* substring = new CordRepSubstring();
   substring->length = n;
   substring->tag = SUBSTRING;
@@ -88,7 +90,7 @@ CordRepBtreeNavigator::Position CordRepBtreeNavigator::Skip(size_t n) {
   // edges that must be skipped.
   while (height > 0) {
     node = edge->btree();
-    index_[height] = index;
+    index_[height] = static_cast<uint8_t>(index);
     node_[--height] = node;
     index = node->begin();
     edge = node->Edge(index);
@@ -99,7 +101,7 @@ CordRepBtreeNavigator::Position CordRepBtreeNavigator::Skip(size_t n) {
       edge = node->Edge(index);
     }
   }
-  index_[0] = index;
+  index_[0] = static_cast<uint8_t>(index);
   return {edge, n};
 }
 
@@ -124,7 +126,7 @@ ReadResult CordRepBtreeNavigator::Read(size_t edge_offset, size_t n) {
   do {
     length -= edge->length;
     while (++index == node->end()) {
-      index_[height] = index;
+      index_[height] = static_cast<uint8_t>(index);
       if (++height > height_) {
         subtree->set_end(subtree_end);
         if (length == 0) return {subtree, 0};
@@ -152,7 +154,7 @@ ReadResult CordRepBtreeNavigator::Read(size_t edge_offset, size_t n) {
   // edges that must be read, adding 'down' nodes to `subtree`.
   while (height > 0) {
     node = edge->btree();
-    index_[height] = index;
+    index_[height] = static_cast<uint8_t>(index);
     node_[--height] = node;
     index = node->begin();
     edge = node->Edge(index);
@@ -176,7 +178,7 @@ ReadResult CordRepBtreeNavigator::Read(size_t edge_offset, size_t n) {
     subtree->edges_[subtree_end++] = Substring(edge, 0, length);
   }
   subtree->set_end(subtree_end);
-  index_[0] = index;
+  index_[0] = static_cast<uint8_t>(index);
   return {tree, length};
 }
 
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.h
index 971b92eda6..3d581c877e 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator.h
@@ -143,8 +143,8 @@ class CordRepBtreeNavigator {
   // `index_` and `node_` contain the navigation state as the 'path' to the
   // current data edge which is at `node_[0]->Edge(index_[0])`. The contents
   // of these are undefined until the instance is initialized (`height_ >= 0`).
-  uint8_t index_[CordRepBtree::kMaxHeight];
-  CordRepBtree* node_[CordRepBtree::kMaxHeight];
+  uint8_t index_[CordRepBtree::kMaxDepth];
+  CordRepBtree* node_[CordRepBtree::kMaxDepth];
 };
 
 // Returns true if this instance is not empty.
@@ -173,6 +173,7 @@ template <CordRepBtree::EdgeType edge_type>
 inline CordRep* CordRepBtreeNavigator::Init(CordRepBtree* tree) {
   assert(tree != nullptr);
   assert(tree->size() > 0);
+  assert(tree->height() <= CordRepBtree::kMaxHeight);
   int height = height_ = tree->height();
   size_t index = tree->index(edge_type);
   node_[height] = tree;
@@ -206,6 +207,7 @@ inline CordRepBtreeNavigator::Position CordRepBtreeNavigator::Seek(
 inline CordRepBtreeNavigator::Position CordRepBtreeNavigator::InitOffset(
     CordRepBtree* tree, size_t offset) {
   assert(tree != nullptr);
+  assert(tree->height() <= CordRepBtree::kMaxHeight);
   if (ABSL_PREDICT_FALSE(offset >= tree->length)) return {nullptr, 0};
   height_ = tree->height();
   node_[height_] = tree;
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator_test.cc
index ce09b1992a..bed7550823 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_navigator_test.cc
@@ -48,7 +48,7 @@ using Position = CordRepBtreeNavigator::Position;
 // CordRepBtreeNavigatorTest is a test fixture which automatically creates a
 // tree to test navigation logic on. The parameter `count' defines the number of
 // data edges in the test tree.
-class CordRepBtreeNavigatorTest : public testing::TestWithParam<int> {
+class CordRepBtreeNavigatorTest : public testing::TestWithParam<size_t> {
  public:
   using Flats = std::vector<CordRep*>;
   static constexpr size_t kCharsPerFlat = 3;
@@ -71,12 +71,12 @@ class CordRepBtreeNavigatorTest : public testing::TestWithParam<int> {
 
   ~CordRepBtreeNavigatorTest() override { CordRep::Unref(tree_); }
 
-  int count() const { return GetParam(); }
+  size_t count() const { return GetParam(); }
   CordRepBtree* tree() { return tree_; }
   const std::string& data() const { return data_; }
   const std::vector<CordRep*>& flats() const { return flats_; }
 
-  static std::string ToString(testing::TestParamInfo<int> param) {
+  static std::string ToString(testing::TestParamInfo<size_t> param) {
     return absl::StrCat(param.param, "_Flats");
   }
 
@@ -131,15 +131,15 @@ TEST_P(CordRepBtreeNavigatorTest, NextPrev) {
 
   EXPECT_THAT(nav.Previous(), Eq(nullptr));
   EXPECT_THAT(nav.Current(), Eq(flats.front()));
-  for (int i = 1; i < flats.size(); ++i) {
+  for (size_t i = 1; i < flats.size(); ++i) {
     ASSERT_THAT(nav.Next(), Eq(flats[i]));
     EXPECT_THAT(nav.Current(), Eq(flats[i]));
   }
   EXPECT_THAT(nav.Next(), Eq(nullptr));
   EXPECT_THAT(nav.Current(), Eq(flats.back()));
-  for (int i = static_cast<int>(flats.size()) - 2; i >= 0; --i) {
-    ASSERT_THAT(nav.Previous(), Eq(flats[i]));
-    EXPECT_THAT(nav.Current(), Eq(flats[i]));
+  for (size_t i = flats.size() - 1; i > 0; --i) {
+    ASSERT_THAT(nav.Previous(), Eq(flats[i - 1]));
+    EXPECT_THAT(nav.Current(), Eq(flats[i - 1]));
   }
   EXPECT_THAT(nav.Previous(), Eq(nullptr));
   EXPECT_THAT(nav.Current(), Eq(flats.front()));
@@ -152,13 +152,13 @@ TEST_P(CordRepBtreeNavigatorTest, PrevNext) {
 
   EXPECT_THAT(nav.Next(), Eq(nullptr));
   EXPECT_THAT(nav.Current(), Eq(flats.back()));
-  for (int i = static_cast<int>(flats.size()) - 2; i >= 0; --i) {
-    ASSERT_THAT(nav.Previous(), Eq(flats[i]));
-    EXPECT_THAT(nav.Current(), Eq(flats[i]));
+  for (size_t i = flats.size() - 1; i > 0; --i) {
+    ASSERT_THAT(nav.Previous(), Eq(flats[i - 1]));
+    EXPECT_THAT(nav.Current(), Eq(flats[i - 1]));
   }
   EXPECT_THAT(nav.Previous(), Eq(nullptr));
   EXPECT_THAT(nav.Current(), Eq(flats.front()));
-  for (int i = 1; i < flats.size(); ++i) {
+  for (size_t i = 1; i < flats.size(); ++i) {
     ASSERT_THAT(nav.Next(), Eq(flats[i]));
     EXPECT_THAT(nav.Current(), Eq(flats[i]));
   }
@@ -180,21 +180,21 @@ TEST(CordRepBtreeNavigatorTest, Reset) {
 }
 
 TEST_P(CordRepBtreeNavigatorTest, Skip) {
-  int count = this->count();
+  size_t count = this->count();
   const Flats& flats = this->flats();
   CordRepBtreeNavigator nav;
   nav.InitFirst(tree());
 
-  for (int char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
+  for (size_t char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
     Position pos = nav.Skip(char_offset);
     EXPECT_THAT(pos.edge, Eq(nav.Current()));
     EXPECT_THAT(pos.edge, Eq(flats[0]));
     EXPECT_THAT(pos.offset, Eq(char_offset));
   }
 
-  for (int index1 = 0; index1 < count; ++index1) {
-    for (int index2 = index1; index2 < count; ++index2) {
-      for (int char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
+  for (size_t index1 = 0; index1 < count; ++index1) {
+    for (size_t index2 = index1; index2 < count; ++index2) {
+      for (size_t char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
         CordRepBtreeNavigator nav;
         nav.InitFirst(tree());
 
@@ -215,20 +215,20 @@ TEST_P(CordRepBtreeNavigatorTest, Skip) {
 }
 
 TEST_P(CordRepBtreeNavigatorTest, Seek) {
-  int count = this->count();
+  size_t count = this->count();
   const Flats& flats = this->flats();
   CordRepBtreeNavigator nav;
   nav.InitFirst(tree());
 
-  for (int char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
+  for (size_t char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
     Position pos = nav.Seek(char_offset);
     EXPECT_THAT(pos.edge, Eq(nav.Current()));
     EXPECT_THAT(pos.edge, Eq(flats[0]));
     EXPECT_THAT(pos.offset, Eq(char_offset));
   }
 
-  for (int index = 0; index < count; ++index) {
-    for (int char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
+  for (size_t index = 0; index < count; ++index) {
+    for (size_t char_offset = 0; char_offset < kCharsPerFlat; ++char_offset) {
       size_t offset = index * kCharsPerFlat + char_offset;
       Position pos1 = nav.Seek(offset);
       ASSERT_THAT(pos1.edge, Eq(flats[index]));
@@ -249,7 +249,7 @@ TEST(CordRepBtreeNavigatorTest, InitOffset) {
   EXPECT_THAT(nav.btree(), Eq(tree));
   EXPECT_THAT(pos.edge, Eq(tree->Edges()[1]));
   EXPECT_THAT(pos.edge, Eq(nav.Current()));
-  EXPECT_THAT(pos.offset, Eq(2));
+  EXPECT_THAT(pos.offset, Eq(2u));
   CordRep::Unref(tree);
 }
 
@@ -319,6 +319,27 @@ TEST_P(CordRepBtreeNavigatorTest, ReadBeyondLengthOfTree) {
   ASSERT_THAT(result.tree, Eq(nullptr));
 }
 
+TEST(CordRepBtreeNavigatorTest, NavigateMaximumTreeDepth) {
+  CordRepFlat* flat1 = MakeFlat("Hello world");
+  CordRepFlat* flat2 = MakeFlat("World Hello");
+
+  CordRepBtree* node = CordRepBtree::Create(flat1);
+  node = CordRepBtree::Append(node, flat2);
+  while (node->height() < CordRepBtree::kMaxHeight) {
+    node = CordRepBtree::New(node);
+  }
+
+  CordRepBtreeNavigator nav;
+  CordRep* edge = nav.InitFirst(node);
+  EXPECT_THAT(edge, Eq(flat1));
+  EXPECT_THAT(nav.Next(), Eq(flat2));
+  EXPECT_THAT(nav.Next(), Eq(nullptr));
+  EXPECT_THAT(nav.Previous(), Eq(flat1));
+  EXPECT_THAT(nav.Previous(), Eq(nullptr));
+
+  CordRep::Unref(node);
+}
+
 }  // namespace
 }  // namespace cord_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.cc
index 5dc76966d2..0d0e860139 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.cc
@@ -17,6 +17,7 @@
 #include <cassert>
 
 #include "absl/base/config.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
 #include "absl/strings/internal/cord_rep_btree_navigator.h"
@@ -44,7 +45,7 @@ absl::string_view CordRepBtreeReader::Read(size_t n, size_t chunk_size,
   // can directly return the substring into the current data edge as the next
   // chunk. We can easily establish from the above code that `navigator_.Next()`
   // has not been called as that requires `chunk_size` to be zero.
-  if (n < chunk_size) return CordRepBtree::EdgeData(edge).substr(result.n);
+  if (n < chunk_size) return EdgeData(edge).substr(result.n);
 
   // The amount of data taken from the last edge is `chunk_size` and `result.n`
   // contains the offset into the current edge trailing the read data (which can
@@ -60,7 +61,7 @@ absl::string_view CordRepBtreeReader::Read(size_t n, size_t chunk_size,
   // We did not read all data, return remaining data from current edge.
   edge = navigator_.Current();
   remaining_ -= consumed_by_read + edge->length;
-  return CordRepBtree::EdgeData(edge).substr(result.n);
+  return EdgeData(edge).substr(result.n);
 }
 
 }  // namespace cord_internal
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.h
index 7aa79dbf10..8db8f8dd17 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader.h
@@ -18,6 +18,7 @@
 #include <cassert>
 
 #include "absl/base/config.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
 #include "absl/strings/internal/cord_rep_btree_navigator.h"
@@ -167,7 +168,7 @@ inline absl::string_view CordRepBtreeReader::Init(CordRepBtree* tree) {
   assert(tree != nullptr);
   const CordRep* edge = navigator_.InitFirst(tree);
   remaining_ = tree->length - edge->length;
-  return CordRepBtree::EdgeData(edge);
+  return EdgeData(edge);
 }
 
 inline absl::string_view CordRepBtreeReader::Next() {
@@ -175,7 +176,7 @@ inline absl::string_view CordRepBtreeReader::Next() {
   const CordRep* edge = navigator_.Next();
   assert(edge != nullptr);
   remaining_ -= edge->length;
-  return CordRepBtree::EdgeData(edge);
+  return EdgeData(edge);
 }
 
 inline absl::string_view CordRepBtreeReader::Skip(size_t skip) {
@@ -190,7 +191,7 @@ inline absl::string_view CordRepBtreeReader::Skip(size_t skip) {
   // The combined length of all edges skipped before `pos.edge` is `skip -
   // pos.offset`, all of which are 'consumed', as well as the current edge.
   remaining_ -= skip - pos.offset + pos.edge->length;
-  return CordRepBtree::EdgeData(pos.edge).substr(pos.offset);
+  return EdgeData(pos.edge).substr(pos.offset);
 }
 
 inline absl::string_view CordRepBtreeReader::Seek(size_t offset) {
@@ -199,7 +200,7 @@ inline absl::string_view CordRepBtreeReader::Seek(size_t offset) {
     remaining_ = 0;
     return {};
   }
-  absl::string_view chunk = CordRepBtree::EdgeData(pos.edge).substr(pos.offset);
+  absl::string_view chunk = EdgeData(pos.edge).substr(pos.offset);
   remaining_ = length() - offset - chunk.length();
   return chunk;
 }
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader_test.cc
index 9b27a81fdb..b4cdd8e58b 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_reader_test.cc
@@ -50,9 +50,9 @@ using ReadResult = CordRepBtreeReader::ReadResult;
 TEST(CordRepBtreeReaderTest, Next) {
   constexpr size_t kChars = 3;
   const size_t cap = CordRepBtree::kMaxCapacity;
-  int counts[] = {1, 2, cap, cap * cap, cap * cap + 1, cap * cap * 2 + 17};
+  size_t counts[] = {1, 2, cap, cap * cap, cap * cap + 1, cap * cap * 2 + 17};
 
-  for (int count : counts) {
+  for (size_t count : counts) {
     std::string data = CreateRandomString(count * kChars);
     std::vector<CordRep*> flats = CreateFlatsFromString(data, kChars);
     CordRepBtree* node = CordRepBtreeFromFlats(flats);
@@ -74,7 +74,7 @@ TEST(CordRepBtreeReaderTest, Next) {
       EXPECT_THAT(reader.remaining(), Eq(remaining));
     }
 
-    EXPECT_THAT(reader.remaining(), Eq(0));
+    EXPECT_THAT(reader.remaining(), Eq(0u));
 
     // Verify trying to read beyond EOF returns empty string_view
     EXPECT_THAT(reader.Next(), testing::IsEmpty());
@@ -86,9 +86,9 @@ TEST(CordRepBtreeReaderTest, Next) {
 TEST(CordRepBtreeReaderTest, Skip) {
   constexpr size_t kChars = 3;
   const size_t cap = CordRepBtree::kMaxCapacity;
-  int counts[] = {1, 2, cap, cap * cap, cap * cap + 1, cap * cap * 2 + 17};
+  size_t counts[] = {1, 2, cap, cap * cap, cap * cap + 1, cap * cap * 2 + 17};
 
-  for (int count : counts) {
+  for (size_t count : counts) {
     std::string data = CreateRandomString(count * kChars);
     std::vector<CordRep*> flats = CreateFlatsFromString(data, kChars);
     CordRepBtree* node = CordRepBtreeFromFlats(flats);
@@ -125,16 +125,16 @@ TEST(CordRepBtreeReaderTest, SkipBeyondLength) {
   CordRepBtreeReader reader;
   reader.Init(tree);
   EXPECT_THAT(reader.Skip(100), IsEmpty());
-  EXPECT_THAT(reader.remaining(), Eq(0));
+  EXPECT_THAT(reader.remaining(), Eq(0u));
   CordRep::Unref(tree);
 }
 
 TEST(CordRepBtreeReaderTest, Seek) {
   constexpr size_t kChars = 3;
   const size_t cap = CordRepBtree::kMaxCapacity;
-  int counts[] = {1, 2, cap, cap * cap, cap * cap + 1, cap * cap * 2 + 17};
+  size_t counts[] = {1, 2, cap, cap * cap, cap * cap + 1, cap * cap * 2 + 17};
 
-  for (int count : counts) {
+  for (size_t count : counts) {
     std::string data = CreateRandomString(count * kChars);
     std::vector<CordRep*> flats = CreateFlatsFromString(data, kChars);
     CordRepBtree* node = CordRepBtreeFromFlats(flats);
@@ -159,9 +159,9 @@ TEST(CordRepBtreeReaderTest, SeekBeyondLength) {
   CordRepBtreeReader reader;
   reader.Init(tree);
   EXPECT_THAT(reader.Seek(6), IsEmpty());
-  EXPECT_THAT(reader.remaining(), Eq(0));
+  EXPECT_THAT(reader.remaining(), Eq(0u));
   EXPECT_THAT(reader.Seek(100), IsEmpty());
-  EXPECT_THAT(reader.remaining(), Eq(0));
+  EXPECT_THAT(reader.remaining(), Eq(0u));
   CordRep::Unref(tree);
 }
 
@@ -179,7 +179,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   chunk = reader.Read(0, chunk.length(), tree);
   EXPECT_THAT(tree, Eq(nullptr));
   EXPECT_THAT(chunk, Eq("abcde"));
-  EXPECT_THAT(reader.remaining(), Eq(10));
+  EXPECT_THAT(reader.remaining(), Eq(10u));
   EXPECT_THAT(reader.Next(), Eq("fghij"));
 
   // Read in full
@@ -188,7 +188,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   EXPECT_THAT(tree, Ne(nullptr));
   EXPECT_THAT(CordToString(tree), Eq("abcdefghijklmno"));
   EXPECT_THAT(chunk, Eq(""));
-  EXPECT_THAT(reader.remaining(), Eq(0));
+  EXPECT_THAT(reader.remaining(), Eq(0u));
   CordRep::Unref(tree);
 
   // Read < chunk bytes
@@ -197,7 +197,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   ASSERT_THAT(tree, Ne(nullptr));
   EXPECT_THAT(CordToString(tree), Eq("abc"));
   EXPECT_THAT(chunk, Eq("de"));
-  EXPECT_THAT(reader.remaining(), Eq(10));
+  EXPECT_THAT(reader.remaining(), Eq(10u));
   EXPECT_THAT(reader.Next(), Eq("fghij"));
   CordRep::Unref(tree);
 
@@ -207,7 +207,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   ASSERT_THAT(tree, Ne(nullptr));
   EXPECT_THAT(CordToString(tree), Eq("cd"));
   EXPECT_THAT(chunk, Eq("e"));
-  EXPECT_THAT(reader.remaining(), Eq(10));
+  EXPECT_THAT(reader.remaining(), Eq(10u));
   EXPECT_THAT(reader.Next(), Eq("fghij"));
   CordRep::Unref(tree);
 
@@ -217,7 +217,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   ASSERT_THAT(tree, Ne(nullptr));
   EXPECT_THAT(CordToString(tree), Eq("fgh"));
   EXPECT_THAT(chunk, Eq("ij"));
-  EXPECT_THAT(reader.remaining(), Eq(5));
+  EXPECT_THAT(reader.remaining(), Eq(5u));
   EXPECT_THAT(reader.Next(), Eq("klmno"));
   CordRep::Unref(tree);
 
@@ -227,7 +227,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   ASSERT_THAT(tree, Ne(nullptr));
   EXPECT_THAT(CordToString(tree), Eq("cdefghijklmn"));
   EXPECT_THAT(chunk, Eq("o"));
-  EXPECT_THAT(reader.remaining(), Eq(0));
+  EXPECT_THAT(reader.remaining(), Eq(0u));
   CordRep::Unref(tree);
 
   // Read across chunks landing on exact edge boundary
@@ -236,7 +236,7 @@ TEST(CordRepBtreeReaderTest, Read) {
   ASSERT_THAT(tree, Ne(nullptr));
   EXPECT_THAT(CordToString(tree), Eq("cdefghij"));
   EXPECT_THAT(chunk, Eq("klmno"));
-  EXPECT_THAT(reader.remaining(), Eq(0));
+  EXPECT_THAT(reader.remaining(), Eq(0u));
   CordRep::Unref(tree);
 
   CordRep::Unref(node);
@@ -245,9 +245,9 @@ TEST(CordRepBtreeReaderTest, Read) {
 TEST(CordRepBtreeReaderTest, ReadExhaustive) {
   constexpr size_t kChars = 3;
   const size_t cap = CordRepBtree::kMaxCapacity;
-  int counts[] = {1, 2, cap, cap * cap + 1, cap * cap * cap * 2 + 17};
+  size_t counts[] = {1, 2, cap, cap * cap + 1, cap * cap * cap * 2 + 17};
 
-  for (int count : counts) {
+  for (size_t count : counts) {
     std::string data = CreateRandomString(count * kChars);
     std::vector<CordRep*> flats = CreateFlatsFromString(data, kChars);
     CordRepBtree* node = CordRepBtreeFromFlats(flats);
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_test.cc
index be9473d41d..9d6ce484ec 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_btree_test.cc
@@ -25,6 +25,7 @@
 #include "absl/base/config.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/cleanup/cleanup.h"
+#include "absl/strings/internal/cord_data_edge.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_test_util.h"
 #include "absl/strings/str_cat.h"
@@ -52,7 +53,6 @@ using ::absl::cordrep_testing::CordToString;
 using ::absl::cordrep_testing::CordVisitReps;
 using ::absl::cordrep_testing::CreateFlatsFromString;
 using ::absl::cordrep_testing::CreateRandomString;
-using ::absl::cordrep_testing::MakeConcat;
 using ::absl::cordrep_testing::MakeExternal;
 using ::absl::cordrep_testing::MakeFlat;
 using ::absl::cordrep_testing::MakeSubstring;
@@ -128,6 +128,16 @@ MATCHER_P2(IsSubstring, start, length,
   return true;
 }
 
+MATCHER_P2(EqExtractResult, tree, rep, "Equals ExtractResult") {
+  if (arg.tree != tree || arg.extracted != rep) {
+    *result_listener << "Expected {" << static_cast<const void*>(tree) << ", "
+                     << static_cast<const void*>(rep) << "}, got {" << arg.tree
+                     << ", " << arg.extracted << "}";
+    return false;
+  }
+  return true;
+}
+
 // DataConsumer is a simple helper class used by tests to 'consume' string
 // fragments from the provided input in forward or backward direction.
 class DataConsumer {
@@ -274,13 +284,14 @@ INSTANTIATE_TEST_SUITE_P(WithParam, CordRepBtreeDualTest,
 TEST(CordRepBtreeTest, SizeIsMultipleOf64) {
   // Only enforce for fully 64-bit platforms.
   if (sizeof(size_t) == 8 && sizeof(void*) == 8) {
-    EXPECT_THAT(sizeof(CordRepBtree) % 64, Eq(0)) << "Should be multiple of 64";
+    EXPECT_THAT(sizeof(CordRepBtree) % 64, Eq(0u))
+        << "Should be multiple of 64";
   }
 }
 
 TEST(CordRepBtreeTest, NewDestroyEmptyTree) {
   auto* tree = CordRepBtree::New();
-  EXPECT_THAT(tree->size(), Eq(0));
+  EXPECT_THAT(tree->size(), Eq(0u));
   EXPECT_THAT(tree->height(), Eq(0));
   EXPECT_THAT(tree->Edges(), ElementsAre());
   CordRepBtree::Destroy(tree);
@@ -288,7 +299,7 @@ TEST(CordRepBtreeTest, NewDestroyEmptyTree) {
 
 TEST(CordRepBtreeTest, NewDestroyEmptyTreeAtHeight) {
   auto* tree = CordRepBtree::New(3);
-  EXPECT_THAT(tree->size(), Eq(0));
+  EXPECT_THAT(tree->size(), Eq(0u));
   EXPECT_THAT(tree->height(), Eq(3));
   EXPECT_THAT(tree->Edges(), ElementsAre());
   CordRepBtree::Destroy(tree);
@@ -312,40 +323,31 @@ TEST(CordRepBtreeTest, EdgeData) {
   CordRepExternal* external = MakeExternal("Hello external");
   CordRep* substr1 = MakeSubstring(1, 6, CordRep::Ref(flat));
   CordRep* substr2 = MakeSubstring(1, 6, CordRep::Ref(external));
-  CordRep* concat = MakeConcat(CordRep::Ref(flat), CordRep::Ref(external));
   CordRep* bad_substr = MakeSubstring(1, 2, CordRep::Ref(substr1));
 
-  EXPECT_TRUE(CordRepBtree::IsDataEdge(flat));
-  EXPECT_THAT(CordRepBtree::EdgeDataPtr(flat),
-              TypedEq<const void*>(flat->Data()));
-  EXPECT_THAT(CordRepBtree::EdgeData(flat), Eq("Hello world"));
+  EXPECT_TRUE(IsDataEdge(flat));
+  EXPECT_THAT(EdgeData(flat).data(), TypedEq<const void*>(flat->Data()));
+  EXPECT_THAT(EdgeData(flat), Eq("Hello world"));
 
-  EXPECT_TRUE(CordRepBtree::IsDataEdge(external));
-  EXPECT_THAT(CordRepBtree::EdgeDataPtr(external),
-              TypedEq<const void*>(external->base));
-  EXPECT_THAT(CordRepBtree::EdgeData(external), Eq("Hello external"));
+  EXPECT_TRUE(IsDataEdge(external));
+  EXPECT_THAT(EdgeData(external).data(), TypedEq<const void*>(external->base));
+  EXPECT_THAT(EdgeData(external), Eq("Hello external"));
 
-  EXPECT_TRUE(CordRepBtree::IsDataEdge(substr1));
-  EXPECT_THAT(CordRepBtree::EdgeDataPtr(substr1),
-              TypedEq<const void*>(flat->Data() + 1));
-  EXPECT_THAT(CordRepBtree::EdgeData(substr1), Eq("ello w"));
+  EXPECT_TRUE(IsDataEdge(substr1));
+  EXPECT_THAT(EdgeData(substr1).data(), TypedEq<const void*>(flat->Data() + 1));
+  EXPECT_THAT(EdgeData(substr1), Eq("ello w"));
 
-  EXPECT_TRUE(CordRepBtree::IsDataEdge(substr2));
-  EXPECT_THAT(CordRepBtree::EdgeDataPtr(substr2),
+  EXPECT_TRUE(IsDataEdge(substr2));
+  EXPECT_THAT(EdgeData(substr2).data(),
               TypedEq<const void*>(external->base + 1));
-  EXPECT_THAT(CordRepBtree::EdgeData(substr2), Eq("ello e"));
+  EXPECT_THAT(EdgeData(substr2), Eq("ello e"));
 
-  EXPECT_FALSE(CordRepBtree::IsDataEdge(concat));
-  EXPECT_FALSE(CordRepBtree::IsDataEdge(bad_substr));
+  EXPECT_FALSE(IsDataEdge(bad_substr));
 #if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
-  EXPECT_DEATH(CordRepBtree::EdgeData(concat), ".*");
-  EXPECT_DEATH(CordRepBtree::EdgeDataPtr(concat), ".*");
-  EXPECT_DEATH(CordRepBtree::EdgeData(bad_substr), ".*");
-  EXPECT_DEATH(CordRepBtree::EdgeDataPtr(bad_substr), ".*");
+  EXPECT_DEATH(EdgeData(bad_substr), ".*");
 #endif
 
   CordRep::Unref(bad_substr);
-  CordRep::Unref(concat);
   CordRep::Unref(substr2);
   CordRep::Unref(substr1);
   CordRep::Unref(external);
@@ -355,7 +357,7 @@ TEST(CordRepBtreeTest, EdgeData) {
 TEST(CordRepBtreeTest, CreateUnrefLeaf) {
   auto* flat = MakeFlat("a");
   auto* leaf = CordRepBtree::Create(flat);
-  EXPECT_THAT(leaf->size(), Eq(1));
+  EXPECT_THAT(leaf->size(), Eq(1u));
   EXPECT_THAT(leaf->height(), Eq(0));
   EXPECT_THAT(leaf->Edges(), ElementsAre(flat));
   CordRepBtree::Unref(leaf);
@@ -364,7 +366,7 @@ TEST(CordRepBtreeTest, CreateUnrefLeaf) {
 TEST(CordRepBtreeTest, NewUnrefNode) {
   auto* leaf = CordRepBtree::Create(MakeFlat("a"));
   CordRepBtree* tree = CordRepBtree::New(leaf);
-  EXPECT_THAT(tree->size(), Eq(1));
+  EXPECT_THAT(tree->size(), Eq(1u));
   EXPECT_THAT(tree->height(), Eq(1));
   EXPECT_THAT(tree->Edges(), ElementsAre(leaf));
   CordRepBtree::Unref(tree);
@@ -652,7 +654,7 @@ TEST_P(CordRepBtreeDualTest, MergeEqualHeightTrees) {
     CordRepBtree* tree = use_append ? CordRepBtree::Append(left, right)
                                     : CordRepBtree::Prepend(right, left);
     EXPECT_THAT(tree, IsNode(1));
-    EXPECT_THAT(tree->Edges(), SizeIs(5));
+    EXPECT_THAT(tree->Edges(), SizeIs(5u));
 
     // `tree` contains all flats originally belonging to `left` and `right`.
     EXPECT_THAT(GetLeafEdges(tree), ElementsAreArray(flats));
@@ -680,7 +682,7 @@ TEST_P(CordRepBtreeDualTest, MergeLeafWithTreeNotExceedingLeafCapacity) {
     CordRepBtree* tree = use_append ? CordRepBtree::Append(left, right)
                                     : CordRepBtree::Prepend(right, left);
     EXPECT_THAT(tree, IsNode(1));
-    EXPECT_THAT(tree->Edges(), SizeIs(3));
+    EXPECT_THAT(tree->Edges(), SizeIs(3u));
 
     // `tree` contains all flats originally belonging to `left` and `right`.
     EXPECT_THAT(GetLeafEdges(tree), ElementsAreArray(flats));
@@ -708,7 +710,7 @@ TEST_P(CordRepBtreeDualTest, MergeLeafWithTreeExceedingLeafCapacity) {
     CordRepBtree* tree = use_append ? CordRepBtree::Append(left, right)
                                     : CordRepBtree::Prepend(right, left);
     EXPECT_THAT(tree, IsNode(1));
-    EXPECT_THAT(tree->Edges(), SizeIs(4));
+    EXPECT_THAT(tree->Edges(), SizeIs(4u));
 
     // `tree` contains all flats originally belonging to `left` and `right`.
     EXPECT_THAT(GetLeafEdges(tree), ElementsAreArray(flats));
@@ -737,7 +739,7 @@ TEST(CordRepBtreeTest, MergeFuzzTest) {
   auto random_leaf_count = [&]() {
     std::uniform_int_distribution<int> dist_height(0, 3);
     std::uniform_int_distribution<int> dist_leaf(0, max_cap - 1);
-    const size_t height = dist_height(rnd);
+    const int height = dist_height(rnd);
     return (height ? pow(max_cap, height) : 0) + dist_leaf(rnd);
   };
 
@@ -748,14 +750,16 @@ TEST(CordRepBtreeTest, MergeFuzzTest) {
     CordRepBtree* left = MakeTree(random_leaf_count(), coin_flip(rnd));
     GetLeafEdges(left, flats);
     if (dice_throw(rnd) == 1) {
-      std::uniform_int_distribution<int> dist(0, left->height());
+      std::uniform_int_distribution<size_t> dist(
+          0, static_cast<size_t>(left->height()));
       RefEdgesAt(dist(rnd), refs, left);
     }
 
     CordRepBtree* right = MakeTree(random_leaf_count(), coin_flip(rnd));
     GetLeafEdges(right, flats);
     if (dice_throw(rnd) == 1) {
-      std::uniform_int_distribution<int> dist(0, right->height());
+      std::uniform_int_distribution<size_t> dist(
+          0, static_cast<size_t>(right->height()));
       RefEdgesAt(dist(rnd), refs, right);
     }
 
@@ -783,7 +787,7 @@ TEST_P(CordRepBtreeTest, RemoveSuffix) {
       CordRep::Unref(node);
     }
 
-    for (int n = 1; n < data.length(); ++n) {
+    for (size_t n = 1; n < data.length(); ++n) {
       AutoUnref refs;
       auto flats = CreateFlatsFromString(data, 512);
       CordRepBtree* node = refs.RefIf(shared(), CreateTree(flats));
@@ -801,10 +805,10 @@ TEST_P(CordRepBtreeTest, RemoveSuffix) {
       const size_t last_length = rep->length - edges.size() * 512;
 
       // All flats except the last edge must be kept or copied 'as is'
-      int index = 0;
+      size_t index = 0;
       for (CordRep* edge : edges) {
         ASSERT_THAT(edge, Eq(flats[index++]));
-        ASSERT_THAT(edge->length, Eq(512));
+        ASSERT_THAT(edge->length, Eq(512u));
       }
 
       // CordRepBtree may optimize small substrings to avoid waste, so only
@@ -812,7 +816,7 @@ TEST_P(CordRepBtreeTest, RemoveSuffix) {
       if (last_length >= 500) {
         EXPECT_THAT(last_edge, Eq(flats[index++]));
         if (shared()) {
-          EXPECT_THAT(last_edge->length, Eq(512));
+          EXPECT_THAT(last_edge->length, Eq(512u));
         } else {
           EXPECT_TRUE(last_edge->refcount.IsOne());
           EXPECT_THAT(last_edge->length, Eq(last_length));
@@ -836,8 +840,8 @@ TEST(CordRepBtreeTest, SubTree) {
     node = CordRepBtree::Append(node, CordRep::Ref(flats[i]));
   }
 
-  for (int offset = 0; offset < data.length(); ++offset) {
-    for (int length = 1; length <= data.length() - offset; ++length) {
+  for (size_t offset = 0; offset < data.length(); ++offset) {
+    for (size_t length = 1; length <= data.length() - offset; ++length) {
       CordRep* rep = node->SubTree(offset, length);
       EXPECT_THAT(CordToString(rep), Eq(data.substr(offset, length)));
       CordRep::Unref(rep);
@@ -864,12 +868,12 @@ TEST(CordRepBtreeTest, SubTreeOnExistingSubstring) {
   ASSERT_THAT(result->tag, Eq(BTREE));
   CordRep::Unref(leaf);
   leaf = result->btree();
-  ASSERT_THAT(leaf->Edges(), ElementsAre(_, IsSubstring(0, 990)));
+  ASSERT_THAT(leaf->Edges(), ElementsAre(_, IsSubstring(0u, 990u)));
   EXPECT_THAT(leaf->Edges()[1]->substring()->child, Eq(flat));
 
   // Verify substring of substring.
   result = leaf->SubTree(3 + 5, 970);
-  ASSERT_THAT(result, IsSubstring(5, 970));
+  ASSERT_THAT(result, IsSubstring(5u, 970u));
   EXPECT_THAT(result->substring()->child, Eq(flat));
   CordRep::Unref(result);
 
@@ -996,50 +1000,6 @@ TEST_P(CordRepBtreeTest, AddLargeDataToLeaf) {
   }
 }
 
-TEST_P(CordRepBtreeDualTest, CreateFromConcat) {
-  AutoUnref refs;
-  CordRep* flats[] = {MakeFlat("abcdefgh"), MakeFlat("ijklm"),
-                      MakeFlat("nopqrstuv"), MakeFlat("wxyz")};
-  auto* left = MakeConcat(flats[0], flats[1]);
-  auto* right = MakeConcat(flats[2], refs.RefIf(first_shared(), flats[3]));
-  auto* concat = refs.RefIf(second_shared(), MakeConcat(left, right));
-  CordRepBtree* result = CordRepBtree::Create(concat);
-  ASSERT_TRUE(CordRepBtree::IsValid(result));
-  EXPECT_THAT(result->length, Eq(26));
-  EXPECT_THAT(CordToString(result), Eq("abcdefghijklmnopqrstuvwxyz"));
-  CordRep::Unref(result);
-}
-
-TEST_P(CordRepBtreeDualTest, AppendConcat) {
-  AutoUnref refs;
-  CordRep* flats[] = {MakeFlat("defgh"), MakeFlat("ijklm"),
-                      MakeFlat("nopqrstuv"), MakeFlat("wxyz")};
-  auto* left = MakeConcat(flats[0], flats[1]);
-  auto* right = MakeConcat(flats[2], refs.RefIf(first_shared(), flats[3]));
-  auto* concat = refs.RefIf(second_shared(), MakeConcat(left, right));
-  CordRepBtree* result = CordRepBtree::Create(MakeFlat("abc"));
-  result = CordRepBtree::Append(result, concat);
-  ASSERT_TRUE(CordRepBtree::IsValid(result));
-  EXPECT_THAT(result->length, Eq(26));
-  EXPECT_THAT(CordToString(result), Eq("abcdefghijklmnopqrstuvwxyz"));
-  CordRep::Unref(result);
-}
-
-TEST_P(CordRepBtreeDualTest, PrependConcat) {
-  AutoUnref refs;
-  CordRep* flats[] = {MakeFlat("abcdefgh"), MakeFlat("ijklm"),
-                      MakeFlat("nopqrstuv"), MakeFlat("wx")};
-  auto* left = MakeConcat(flats[0], flats[1]);
-  auto* right = MakeConcat(flats[2], refs.RefIf(first_shared(), flats[3]));
-  auto* concat = refs.RefIf(second_shared(), MakeConcat(left, right));
-  CordRepBtree* result = CordRepBtree::Create(MakeFlat("yz"));
-  result = CordRepBtree::Prepend(result, concat);
-  ASSERT_TRUE(CordRepBtree::IsValid(result));
-  EXPECT_THAT(result->length, Eq(26));
-  EXPECT_THAT(CordToString(result), Eq("abcdefghijklmnopqrstuvwxyz"));
-  CordRep::Unref(result);
-}
-
 TEST_P(CordRepBtreeTest, CreateFromTreeReturnsTree) {
   AutoUnref refs;
   CordRepBtree* leaf = CordRepBtree::Create(MakeFlat("Hello world"));
@@ -1135,7 +1095,7 @@ TEST_P(CordRepBtreeHeightTest, GetAppendBufferNotFlat) {
   for (int i = 1; i <= height(); ++i) {
     tree = CordRepBtree::New(tree);
   }
-  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0));
+  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0u));
   CordRepBtree::Unref(tree);
 }
 
@@ -1145,7 +1105,7 @@ TEST_P(CordRepBtreeHeightTest, GetAppendBufferFlatNotPrivate) {
   for (int i = 1; i <= height(); ++i) {
     tree = CordRepBtree::New(tree);
   }
-  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0));
+  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0u));
   CordRepBtree::Unref(tree);
   CordRep::Unref(flat);
 }
@@ -1159,7 +1119,7 @@ TEST_P(CordRepBtreeHeightTest, GetAppendBufferTreeNotPrivate) {
     if (i == (height() + 1) / 2) refs.Ref(tree);
     tree = CordRepBtree::New(tree);
   }
-  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0));
+  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0u));
   CordRepBtree::Unref(tree);
   CordRep::Unref(flat);
 }
@@ -1171,7 +1131,7 @@ TEST_P(CordRepBtreeHeightTest, GetAppendBufferFlatNoCapacity) {
   for (int i = 1; i <= height(); ++i) {
     tree = CordRepBtree::New(tree);
   }
-  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0));
+  EXPECT_THAT(tree->GetAppendBuffer(1), SizeIs(0u));
   CordRepBtree::Unref(tree);
 }
 
@@ -1182,9 +1142,9 @@ TEST_P(CordRepBtreeHeightTest, GetAppendBufferFlatWithCapacity) {
     tree = CordRepBtree::New(tree);
   }
   absl::Span<char> span = tree->GetAppendBuffer(2);
-  EXPECT_THAT(span, SizeIs(2));
+  EXPECT_THAT(span, SizeIs(2u));
   EXPECT_THAT(span.data(), TypedEq<void*>(flat->Data() + 3));
-  EXPECT_THAT(tree->length, Eq(5));
+  EXPECT_THAT(tree->length, Eq(5u));
 
   size_t avail = flat->Capacity() - 5;
   span = tree->GetAppendBuffer(avail + 100);
@@ -1436,11 +1396,11 @@ TEST(CordRepBtreeTest, CheckAssertValidShallowVsDeep) {
 }
 
 TEST_P(CordRepBtreeTest, Rebuild) {
-  for (size_t size : {3, 8, 100, 10000, 1000000}) {
+  for (size_t size : {3u, 8u, 100u, 10000u, 1000000u}) {
     SCOPED_TRACE(absl::StrCat("Rebuild @", size));
 
     std::vector<CordRepFlat*> flats;
-    for (int i = 0; i < size; ++i) {
+    for (size_t i = 0; i < size; ++i) {
       flats.push_back(CordRepFlat::New(2));
       flats.back()->Data()[0] = 'x';
       flats.back()->length = 1;
@@ -1483,6 +1443,125 @@ TEST_P(CordRepBtreeTest, Rebuild) {
   }
 }
 
+// Convenience helper for CordRepBtree::ExtractAppendBuffer
+CordRepBtree::ExtractResult ExtractLast(CordRepBtree* input, size_t cap = 1) {
+  return CordRepBtree::ExtractAppendBuffer(input, cap);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferLeafSingleFlat) {
+  CordRep* flat = MakeFlat("Abc");
+  CordRepBtree* leaf = CordRepBtree::Create(flat);
+  EXPECT_THAT(ExtractLast(leaf), EqExtractResult(nullptr, flat));
+  CordRep::Unref(flat);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNodeSingleFlat) {
+  CordRep* flat = MakeFlat("Abc");
+  CordRepBtree* leaf = CordRepBtree::Create(flat);
+  CordRepBtree* node = CordRepBtree::New(leaf);
+  EXPECT_THAT(ExtractLast(node), EqExtractResult(nullptr, flat));
+  CordRep::Unref(flat);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferLeafTwoFlats) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdef", 3);
+  CordRepBtree* leaf = CreateTree(flats);
+  EXPECT_THAT(ExtractLast(leaf), EqExtractResult(flats[0], flats[1]));
+  CordRep::Unref(flats[0]);
+  CordRep::Unref(flats[1]);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNodeTwoFlats) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdef", 3);
+  CordRepBtree* leaf = CreateTree(flats);
+  CordRepBtree* node = CordRepBtree::New(leaf);
+  EXPECT_THAT(ExtractLast(node), EqExtractResult(flats[0], flats[1]));
+  CordRep::Unref(flats[0]);
+  CordRep::Unref(flats[1]);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNodeTwoFlatsInTwoLeafs) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdef", 3);
+  CordRepBtree* leaf1 = CordRepBtree::Create(flats[0]);
+  CordRepBtree* leaf2 = CordRepBtree::Create(flats[1]);
+  CordRepBtree* node = CordRepBtree::New(leaf1, leaf2);
+  EXPECT_THAT(ExtractLast(node), EqExtractResult(flats[0], flats[1]));
+  CordRep::Unref(flats[0]);
+  CordRep::Unref(flats[1]);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferLeafThreeFlats) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdefghi", 3);
+  CordRepBtree* leaf = CreateTree(flats);
+  EXPECT_THAT(ExtractLast(leaf), EqExtractResult(leaf, flats[2]));
+  CordRep::Unref(flats[2]);
+  CordRep::Unref(leaf);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNodeThreeFlatsRightNoFolding) {
+  CordRep* flat = MakeFlat("Abc");
+  std::vector<CordRep*> flats = CreateFlatsFromString("defghi", 3);
+  CordRepBtree* leaf1 = CordRepBtree::Create(flat);
+  CordRepBtree* leaf2 = CreateTree(flats);
+  CordRepBtree* node = CordRepBtree::New(leaf1, leaf2);
+  EXPECT_THAT(ExtractLast(node), EqExtractResult(node, flats[1]));
+  EXPECT_THAT(node->Edges(), ElementsAre(leaf1, leaf2));
+  EXPECT_THAT(leaf1->Edges(), ElementsAre(flat));
+  EXPECT_THAT(leaf2->Edges(), ElementsAre(flats[0]));
+  CordRep::Unref(node);
+  CordRep::Unref(flats[1]);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNodeThreeFlatsRightLeafFolding) {
+  CordRep* flat = MakeFlat("Abc");
+  std::vector<CordRep*> flats = CreateFlatsFromString("defghi", 3);
+  CordRepBtree* leaf1 = CreateTree(flats);
+  CordRepBtree* leaf2 = CordRepBtree::Create(flat);
+  CordRepBtree* node = CordRepBtree::New(leaf1, leaf2);
+  EXPECT_THAT(ExtractLast(node), EqExtractResult(leaf1, flat));
+  EXPECT_THAT(leaf1->Edges(), ElementsAreArray(flats));
+  CordRep::Unref(leaf1);
+  CordRep::Unref(flat);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNoCapacity) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdef", 3);
+  CordRepBtree* leaf = CreateTree(flats);
+  size_t avail = flats[1]->flat()->Capacity() - flats[1]->length;
+  EXPECT_THAT(ExtractLast(leaf, avail + 1), EqExtractResult(leaf, nullptr));
+  EXPECT_THAT(ExtractLast(leaf, avail), EqExtractResult(flats[0], flats[1]));
+  CordRep::Unref(flats[0]);
+  CordRep::Unref(flats[1]);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferNotFlat) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdef", 3);
+  auto substr = MakeSubstring(1, 2, flats[1]);
+  CordRepBtree* leaf = CreateTree({flats[0], substr});
+  EXPECT_THAT(ExtractLast(leaf), EqExtractResult(leaf, nullptr));
+  CordRep::Unref(leaf);
+}
+
+TEST(CordRepBtreeTest, ExtractAppendBufferShared) {
+  std::vector<CordRep*> flats = CreateFlatsFromString("abcdef", 3);
+  CordRepBtree* leaf = CreateTree(flats);
+
+  CordRep::Ref(flats[1]);
+  EXPECT_THAT(ExtractLast(leaf), EqExtractResult(leaf, nullptr));
+  CordRep::Unref(flats[1]);
+
+  CordRep::Ref(leaf);
+  EXPECT_THAT(ExtractLast(leaf), EqExtractResult(leaf, nullptr));
+  CordRep::Unref(leaf);
+
+  CordRepBtree* node = CordRepBtree::New(leaf);
+  CordRep::Ref(node);
+  EXPECT_THAT(ExtractLast(node), EqExtractResult(node, nullptr));
+  CordRep::Unref(node);
+
+  CordRep::Unref(node);
+}
+
 }  // namespace
 }  // namespace cord_internal
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.cc
index 81514543db..20a5579767 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume.cc
@@ -40,88 +40,21 @@ CordRep* ClipSubstring(CordRepSubstring* substring) {
   return child;
 }
 
-// Unrefs the provided `concat`, and returns `{concat->left, concat->right}`
-// Adds or assumes a reference on `concat->left` and `concat->right`.
-// Returns an array of 2 elements containing the left and right nodes.
-std::array<CordRep*, 2> ClipConcat(CordRepConcat* concat) {
-  std::array<CordRep*, 2> result{concat->left, concat->right};
-  if (concat->refcount.IsOne()) {
-    delete concat;
-  } else {
-    CordRep::Ref(result[0]);
-    CordRep::Ref(result[1]);
-    CordRep::Unref(concat);
-  }
-  return result;
-}
+}  // namespace
 
-void Consume(bool forward, CordRep* rep, ConsumeFn consume_fn) {
+void Consume(CordRep* rep, ConsumeFn consume_fn) {
   size_t offset = 0;
   size_t length = rep->length;
-  struct Entry {
-    CordRep* rep;
-    size_t offset;
-    size_t length;
-  };
-  absl::InlinedVector<Entry, 40> stack;
-
-  for (;;) {
-    if (rep->tag == CONCAT) {
-      std::array<CordRep*, 2> res = ClipConcat(rep->concat());
-      CordRep* left = res[0];
-      CordRep* right = res[1];
-
-      if (left->length <= offset) {
-        // Don't need left node
-        offset -= left->length;
-        CordRep::Unref(left);
-        rep = right;
-        continue;
-      }
 
-      size_t length_left = left->length - offset;
-      if (length_left >= length) {
-        // Don't need right node
-        CordRep::Unref(right);
-        rep = left;
-        continue;
-      }
-
-      // Need both nodes
-      size_t length_right = length - length_left;
-      if (forward) {
-        stack.push_back({right, 0, length_right});
-        rep = left;
-        length = length_left;
-      } else {
-        stack.push_back({left, offset, length_left});
-        rep = right;
-        offset = 0;
-        length = length_right;
-      }
-    } else if (rep->tag == SUBSTRING) {
-      offset += rep->substring()->start;
-      rep = ClipSubstring(rep->substring());
-    } else {
-      consume_fn(rep, offset, length);
-      if (stack.empty()) return;
-
-      rep = stack.back().rep;
-      offset = stack.back().offset;
-      length = stack.back().length;
-      stack.pop_back();
-    }
+  if (rep->tag == SUBSTRING) {
+    offset += rep->substring()->start;
+    rep = ClipSubstring(rep->substring());
   }
-}
-
-}  // namespace
-
-void Consume(CordRep* rep, ConsumeFn consume_fn) {
-  return Consume(true, rep, std::move(consume_fn));
+  consume_fn(rep, offset, length);
 }
 
 void ReverseConsume(CordRep* rep, ConsumeFn consume_fn) {
-  return Consume(false, rep, std::move(consume_fn));
+  return Consume(rep, std::move(consume_fn));
 }
 
 }  // namespace cord_internal
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume_test.cc
deleted file mode 100644
index e507824b4f..0000000000
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_consume_test.cc
+++ /dev/null
@@ -1,173 +0,0 @@
-// Copyright 2021 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/cord_rep_consume.h"
-
-#include <functional>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/internal/cord_internal.h"
-#include "absl/strings/internal/cord_rep_flat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace cord_internal {
-namespace {
-
-using testing::InSequence;
-using testing::MockFunction;
-
-// Returns the depth of a node
-int Depth(const CordRep* rep) {
-  return (rep->tag == CONCAT) ? rep->concat()->depth() : 0;
-}
-
-// Creates a concatenation of the specified nodes.
-CordRepConcat* CreateConcat(CordRep* left, CordRep* right) {
-  auto* concat = new CordRepConcat();
-  concat->tag = CONCAT;
-  concat->left = left;
-  concat->right = right;
-  concat->length = left->length + right->length;
-  concat->set_depth(1 + (std::max)(Depth(left), Depth(right)));
-  return concat;
-}
-
-// Creates a flat with the length set to `length`
-CordRepFlat* CreateFlatWithLength(size_t length) {
-  auto* flat = CordRepFlat::New(length);
-  flat->length = length;
-  return flat;
-}
-
-// Creates a substring node on the specified child.
-CordRepSubstring* CreateSubstring(CordRep* child, size_t start, size_t length) {
-  auto* rep = new CordRepSubstring();
-  rep->length = length;
-  rep->tag = SUBSTRING;
-  rep->start = start;
-  rep->child = child;
-  return rep;
-}
-
-// Flats we use in the tests
-CordRep* flat[6];
-
-// Creates a test tree
-CordRep* CreateTestTree() {
-  flat[0] = CreateFlatWithLength(1);
-  flat[1] = CreateFlatWithLength(7);
-  CordRepConcat* left = CreateConcat(flat[0], CreateSubstring(flat[1], 2, 4));
-
-  flat[2] = CreateFlatWithLength(9);
-  flat[3] = CreateFlatWithLength(13);
-  CordRepConcat* right1 = CreateConcat(flat[2], flat[3]);
-
-  flat[4] = CreateFlatWithLength(15);
-  flat[5] = CreateFlatWithLength(19);
-  CordRepConcat* right2 = CreateConcat(flat[4], flat[5]);
-
-  CordRepConcat* right = CreateConcat(right1, CreateSubstring(right2, 5, 17));
-  return CreateConcat(left, right);
-}
-
-TEST(CordRepConsumeTest, Consume) {
-  InSequence in_sequence;
-  CordRep* tree = CreateTestTree();
-  MockFunction<void(CordRep*, size_t, size_t)> consume;
-  EXPECT_CALL(consume, Call(flat[0], 0, 1));
-  EXPECT_CALL(consume, Call(flat[1], 2, 4));
-  EXPECT_CALL(consume, Call(flat[2], 0, 9));
-  EXPECT_CALL(consume, Call(flat[3], 0, 13));
-  EXPECT_CALL(consume, Call(flat[4], 5, 10));
-  EXPECT_CALL(consume, Call(flat[5], 0, 7));
-  Consume(tree, consume.AsStdFunction());
-  for (CordRep* rep : flat) {
-    EXPECT_TRUE(rep->refcount.IsOne());
-    CordRep::Unref(rep);
-  }
-}
-
-TEST(CordRepConsumeTest, ConsumeShared) {
-  InSequence in_sequence;
-  CordRep* tree = CreateTestTree();
-  MockFunction<void(CordRep*, size_t, size_t)> consume;
-  EXPECT_CALL(consume, Call(flat[0], 0, 1));
-  EXPECT_CALL(consume, Call(flat[1], 2, 4));
-  EXPECT_CALL(consume, Call(flat[2], 0, 9));
-  EXPECT_CALL(consume, Call(flat[3], 0, 13));
-  EXPECT_CALL(consume, Call(flat[4], 5, 10));
-  EXPECT_CALL(consume, Call(flat[5], 0, 7));
-  Consume(CordRep::Ref(tree), consume.AsStdFunction());
-  for (CordRep* rep : flat) {
-    EXPECT_FALSE(rep->refcount.IsOne());
-    CordRep::Unref(rep);
-  }
-  CordRep::Unref(tree);
-}
-
-TEST(CordRepConsumeTest, Reverse) {
-  InSequence in_sequence;
-  CordRep* tree = CreateTestTree();
-  MockFunction<void(CordRep*, size_t, size_t)> consume;
-  EXPECT_CALL(consume, Call(flat[5], 0, 7));
-  EXPECT_CALL(consume, Call(flat[4], 5, 10));
-  EXPECT_CALL(consume, Call(flat[3], 0, 13));
-  EXPECT_CALL(consume, Call(flat[2], 0, 9));
-  EXPECT_CALL(consume, Call(flat[1], 2, 4));
-  EXPECT_CALL(consume, Call(flat[0], 0, 1));
-  ReverseConsume(tree, consume.AsStdFunction());
-  for (CordRep* rep : flat) {
-    EXPECT_TRUE(rep->refcount.IsOne());
-    CordRep::Unref(rep);
-  }
-}
-
-TEST(CordRepConsumeTest, ReverseShared) {
-  InSequence in_sequence;
-  CordRep* tree = CreateTestTree();
-  MockFunction<void(CordRep*, size_t, size_t)> consume;
-  EXPECT_CALL(consume, Call(flat[5], 0, 7));
-  EXPECT_CALL(consume, Call(flat[4], 5, 10));
-  EXPECT_CALL(consume, Call(flat[3], 0, 13));
-  EXPECT_CALL(consume, Call(flat[2], 0, 9));
-  EXPECT_CALL(consume, Call(flat[1], 2, 4));
-  EXPECT_CALL(consume, Call(flat[0], 0, 1));
-  ReverseConsume(CordRep::Ref(tree), consume.AsStdFunction());
-  for (CordRep* rep : flat) {
-    EXPECT_FALSE(rep->refcount.IsOne());
-    CordRep::Unref(rep);
-  }
-  CordRep::Unref(tree);
-}
-
-TEST(CordRepConsumeTest, UnreachableFlat) {
-  InSequence in_sequence;
-  CordRepFlat* flat1 = CreateFlatWithLength(10);
-  CordRepFlat* flat2 = CreateFlatWithLength(20);
-  CordRepConcat* concat = CreateConcat(flat1, flat2);
-  CordRepSubstring* tree = CreateSubstring(concat, 15, 10);
-  MockFunction<void(CordRep*, size_t, size_t)> consume;
-  EXPECT_CALL(consume, Call(flat2, 5, 10));
-  Consume(tree, consume.AsStdFunction());
-  EXPECT_TRUE(flat2->refcount.IsOne());
-  CordRep::Unref(flat2);
-}
-
-}  // namespace
-}  // namespace cord_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc.cc
new file mode 100644
index 0000000000..7d7273ef8d
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc.cc
@@ -0,0 +1,55 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/cord_rep_crc.h"
+
+#include <cassert>
+#include <cstdint>
+
+#include "absl/base/config.h"
+#include "absl/strings/internal/cord_internal.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+
+CordRepCrc* CordRepCrc::New(CordRep* child, uint32_t crc) {
+  if (child != nullptr && child->IsCrc()) {
+    if (child->refcount.IsOne()) {
+      child->crc()->crc = crc;
+      return child->crc();
+    }
+    CordRep* old = child;
+    child = old->crc()->child;
+    CordRep::Ref(child);
+    CordRep::Unref(old);
+  }
+  auto* new_cordrep = new CordRepCrc;
+  new_cordrep->length = child != nullptr ? child->length : 0;
+  new_cordrep->tag = cord_internal::CRC;
+  new_cordrep->child = child;
+  new_cordrep->crc = crc;
+  return new_cordrep;
+}
+
+void CordRepCrc::Destroy(CordRepCrc* node) {
+  if (node->child != nullptr) {
+    CordRep::Unref(node->child);
+  }
+  delete node;
+}
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc.h
new file mode 100644
index 0000000000..455a1127d6
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc.h
@@ -0,0 +1,102 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_STRINGS_INTERNAL_CORD_REP_CRC_H_
+#define ABSL_STRINGS_INTERNAL_CORD_REP_CRC_H_
+
+#include <cassert>
+#include <cstdint>
+
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+#include "absl/strings/internal/cord_internal.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+
+// CordRepCrc is a CordRep node intended only to appear at the top level of a
+// cord tree.  It associates an "expected CRC" with the contained data, to allow
+// for easy passage of checksum data in Cord data flows.
+//
+// From Cord's perspective, the crc value has no semantics; any validation of
+// the contained checksum is the user's responsibility.
+struct CordRepCrc : public CordRep {
+  CordRep* child;
+  uint32_t crc;
+
+  // Consumes `child` and returns a CordRepCrc prefixed tree containing `child`.
+  // If the specified `child` is itself a CordRepCrc node, then this method
+  // either replaces the existing node, or directly updates the crc value in it
+  // depending on the node being shared or not, i.e.: refcount.IsOne().
+  // `child` must only be null if the Cord is empty. Never returns null.
+  static CordRepCrc* New(CordRep* child, uint32_t crc);
+
+  // Destroys (deletes) the provided node. `node` must not be null.
+  static void Destroy(CordRepCrc* node);
+};
+
+// Consumes `rep` and returns a CordRep* with any outer CordRepCrc wrapper
+// removed.  This is usually a no-op (returning `rep`), but this will remove and
+// unref an outer CordRepCrc node.
+inline CordRep* RemoveCrcNode(CordRep* rep) {
+  assert(rep != nullptr);
+  if (ABSL_PREDICT_FALSE(rep->IsCrc())) {
+    CordRep* child = rep->crc()->child;
+    if (rep->refcount.IsOne()) {
+      delete rep->crc();
+    } else {
+      CordRep::Ref(child);
+      CordRep::Unref(rep);
+    }
+    return child;
+  }
+  return rep;
+}
+
+// Returns `rep` if it is not a CordRepCrc node, or its child if it is.
+// Does not consume or create a reference on `rep` or the returned value.
+inline CordRep* SkipCrcNode(CordRep* rep) {
+  assert(rep != nullptr);
+  if (ABSL_PREDICT_FALSE(rep->IsCrc())) {
+    return rep->crc()->child;
+  } else {
+    return rep;
+  }
+}
+
+inline const CordRep* SkipCrcNode(const CordRep* rep) {
+  assert(rep != nullptr);
+  if (ABSL_PREDICT_FALSE(rep->IsCrc())) {
+    return rep->crc()->child;
+  } else {
+    return rep;
+  }
+}
+
+inline CordRepCrc* CordRep::crc() {
+  assert(IsCrc());
+  return static_cast<CordRepCrc*>(this);
+}
+
+inline const CordRepCrc* CordRep::crc() const {
+  assert(IsCrc());
+  return static_cast<const CordRepCrc*>(this);
+}
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_INTERNAL_CORD_REP_CRC_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc_test.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc_test.cc
new file mode 100644
index 0000000000..42a9110b87
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_crc_test.cc
@@ -0,0 +1,122 @@
+// Copyright 2021 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/cord_rep_crc.h"
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/config.h"
+#include "absl/strings/internal/cord_internal.h"
+#include "absl/strings/internal/cord_rep_test_util.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace cord_internal {
+namespace {
+
+using ::absl::cordrep_testing::MakeFlat;
+using ::testing::Eq;
+using ::testing::IsNull;
+using ::testing::Ne;
+
+#if !defined(NDEBUG) && GTEST_HAS_DEATH_TEST
+
+TEST(CordRepCrc, RemoveCrcWithNullptr) {
+  EXPECT_DEATH(RemoveCrcNode(nullptr), "");
+}
+
+#endif  // !NDEBUG && GTEST_HAS_DEATH_TEST
+
+TEST(CordRepCrc, NewDestroy) {
+  CordRep* rep = cordrep_testing::MakeFlat("Hello world");
+  CordRepCrc* crc = CordRepCrc::New(rep, 12345);
+  EXPECT_TRUE(crc->refcount.IsOne());
+  EXPECT_THAT(crc->child, Eq(rep));
+  EXPECT_THAT(crc->crc, Eq(12345u));
+  EXPECT_TRUE(rep->refcount.IsOne());
+  CordRepCrc::Destroy(crc);
+}
+
+TEST(CordRepCrc, NewExistingCrcNotShared) {
+  CordRep* rep = cordrep_testing::MakeFlat("Hello world");
+  CordRepCrc* crc = CordRepCrc::New(rep, 12345);
+  CordRepCrc* new_crc = CordRepCrc::New(crc, 54321);
+  EXPECT_THAT(new_crc, Eq(crc));
+  EXPECT_TRUE(new_crc->refcount.IsOne());
+  EXPECT_THAT(new_crc->child, Eq(rep));
+  EXPECT_THAT(new_crc->crc, Eq(54321u));
+  EXPECT_TRUE(rep->refcount.IsOne());
+  CordRepCrc::Destroy(new_crc);
+}
+
+TEST(CordRepCrc, NewExistingCrcShared) {
+  CordRep* rep = cordrep_testing::MakeFlat("Hello world");
+  CordRepCrc* crc = CordRepCrc::New(rep, 12345);
+  CordRep::Ref(crc);
+  CordRepCrc* new_crc = CordRepCrc::New(crc, 54321);
+
+  EXPECT_THAT(new_crc, Ne(crc));
+  EXPECT_TRUE(new_crc->refcount.IsOne());
+  EXPECT_TRUE(crc->refcount.IsOne());
+  EXPECT_FALSE(rep->refcount.IsOne());
+  EXPECT_THAT(crc->child, Eq(rep));
+  EXPECT_THAT(new_crc->child, Eq(rep));
+  EXPECT_THAT(crc->crc, Eq(12345u));
+  EXPECT_THAT(new_crc->crc, Eq(54321u));
+
+  CordRep::Unref(crc);
+  CordRep::Unref(new_crc);
+}
+
+TEST(CordRepCrc, NewEmpty) {
+  CordRepCrc* crc = CordRepCrc::New(nullptr, 12345);
+  EXPECT_TRUE(crc->refcount.IsOne());
+  EXPECT_THAT(crc->child, IsNull());
+  EXPECT_THAT(crc->length, Eq(0u));
+  EXPECT_THAT(crc->crc, Eq(12345u));
+  EXPECT_TRUE(crc->refcount.IsOne());
+  CordRepCrc::Destroy(crc);
+}
+
+TEST(CordRepCrc, RemoveCrcNotCrc) {
+  CordRep* rep = cordrep_testing::MakeFlat("Hello world");
+  CordRep* nocrc = RemoveCrcNode(rep);
+  EXPECT_THAT(nocrc, Eq(rep));
+  CordRep::Unref(nocrc);
+}
+
+TEST(CordRepCrc, RemoveCrcNotShared) {
+  CordRep* rep = cordrep_testing::MakeFlat("Hello world");
+  CordRepCrc* crc = CordRepCrc::New(rep, 12345);
+  CordRep* nocrc = RemoveCrcNode(crc);
+  EXPECT_THAT(nocrc, Eq(rep));
+  EXPECT_TRUE(rep->refcount.IsOne());
+  CordRep::Unref(nocrc);
+}
+
+TEST(CordRepCrc, RemoveCrcShared) {
+  CordRep* rep = cordrep_testing::MakeFlat("Hello world");
+  CordRepCrc* crc = CordRepCrc::New(rep, 12345);
+  CordRep::Ref(crc);
+  CordRep* nocrc = RemoveCrcNode(crc);
+  EXPECT_THAT(nocrc, Eq(rep));
+  EXPECT_FALSE(rep->refcount.IsOne());
+  CordRep::Unref(nocrc);
+  CordRep::Unref(crc);
+}
+
+}  // namespace
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_flat.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_flat.h
index 4d0f988697..e3e27fcd7c 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_flat.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_flat.h
@@ -20,6 +20,8 @@
 #include <cstdint>
 #include <memory>
 
+#include "absl/base/config.h"
+#include "absl/base/macros.h"
 #include "absl/strings/internal/cord_internal.h"
 
 namespace absl {
@@ -42,23 +44,45 @@ static constexpr size_t kMinFlatSize = 32;
 static constexpr size_t kMaxFlatSize = 4096;
 static constexpr size_t kMaxFlatLength = kMaxFlatSize - kFlatOverhead;
 static constexpr size_t kMinFlatLength = kMinFlatSize - kFlatOverhead;
+static constexpr size_t kMaxLargeFlatSize = 256 * 1024;
+static constexpr size_t kMaxLargeFlatLength = kMaxLargeFlatSize - kFlatOverhead;
 
+// kTagBase should make the Size <--> Tag computation resilient
+// against changes to the value of FLAT when we add a new tag..
+static constexpr uint8_t kTagBase = FLAT - 4;
+
+// Converts the provided rounded size to the corresponding tag
 constexpr uint8_t AllocatedSizeToTagUnchecked(size_t size) {
-  return static_cast<uint8_t>((size <= 1024) ? size / 8 + 1
-                                             : 129 + size / 32 - 1024 / 32);
+  return static_cast<uint8_t>(size <= 512 ? kTagBase + size / 8
+                              : size <= 8192
+                                  ? kTagBase + 512 / 8 + size / 64 - 512 / 64
+                                  : kTagBase + 512 / 8 + ((8192 - 512) / 64) +
+                                        size / 4096 - 8192 / 4096);
+}
+
+// Converts the provided tag to the corresponding allocated size
+constexpr size_t TagToAllocatedSize(uint8_t tag) {
+  return (tag <= kTagBase + 512 / 8) ? tag * 8 - kTagBase * 8
+         : (tag <= kTagBase + (512 / 8) + ((8192 - 512) / 64))
+             ? 512 + tag * 64 - kTagBase * 64 - 512 / 8 * 64
+             : 8192 + tag * 4096 - kTagBase * 4096 -
+                   ((512 / 8) + ((8192 - 512) / 64)) * 4096;
 }
 
-static_assert(kMinFlatSize / 8 + 1 >= FLAT, "");
-static_assert(AllocatedSizeToTagUnchecked(kMaxFlatSize) <= MAX_FLAT_TAG, "");
+static_assert(AllocatedSizeToTagUnchecked(kMinFlatSize) == FLAT, "");
+static_assert(AllocatedSizeToTagUnchecked(kMaxLargeFlatSize) == MAX_FLAT_TAG,
+              "");
 
-// Helper functions for rounded div, and rounding to exact sizes.
-constexpr size_t DivUp(size_t n, size_t m) { return (n + m - 1) / m; }
-constexpr size_t RoundUp(size_t n, size_t m) { return DivUp(n, m) * m; }
+// RoundUp logically performs `((n + m - 1) / m) * m` to round up to the nearest
+// multiple of `m`, optimized for the invariant that `m` is a power of 2.
+constexpr size_t RoundUp(size_t n, size_t m) {
+  return (n + m - 1) & (0 - m);
+}
 
 // Returns the size to the nearest equal or larger value that can be
 // expressed exactly as a tag value.
 inline size_t RoundUpForTag(size_t size) {
-  return RoundUp(size, (size <= 1024) ? 8 : 32);
+  return RoundUp(size, (size <= 512) ? 8 : (size <= 8192 ? 64 : 4096));
 }
 
 // Converts the allocated size to a tag, rounding down if the size
@@ -71,26 +95,26 @@ inline uint8_t AllocatedSizeToTag(size_t size) {
   return tag;
 }
 
-// Converts the provided tag to the corresponding allocated size
-constexpr size_t TagToAllocatedSize(uint8_t tag) {
-  return (tag <= 129) ? ((tag - 1) * 8) : (1024 + (tag - 129) * 32);
-}
-
 // Converts the provided tag to the corresponding available data length
 constexpr size_t TagToLength(uint8_t tag) {
   return TagToAllocatedSize(tag) - kFlatOverhead;
 }
 
 // Enforce that kMaxFlatSize maps to a well-known exact tag value.
-static_assert(TagToAllocatedSize(225) == kMaxFlatSize, "Bad tag logic");
+static_assert(TagToAllocatedSize(MAX_FLAT_TAG) == kMaxLargeFlatSize,
+              "Bad tag logic");
 
 struct CordRepFlat : public CordRep {
+  // Tag for explicit 'large flat' allocation
+  struct Large {};
+
   // Creates a new flat node.
-  static CordRepFlat* New(size_t len) {
+  template <size_t max_flat_size, typename... Args>
+  static CordRepFlat* NewImpl(size_t len, Args... args ABSL_ATTRIBUTE_UNUSED) {
     if (len <= kMinFlatLength) {
       len = kMinFlatLength;
-    } else if (len > kMaxFlatLength) {
-      len = kMaxFlatLength;
+    } else if (len > max_flat_size - kFlatOverhead) {
+      len = max_flat_size - kFlatOverhead;
     }
 
     // Round size up so it matches a size we can exactly express in a tag.
@@ -101,6 +125,12 @@ struct CordRepFlat : public CordRep {
     return rep;
   }
 
+  static CordRepFlat* New(size_t len) { return NewImpl<kMaxFlatSize>(len); }
+
+  static CordRepFlat* New(Large, size_t len) {
+    return NewImpl<kMaxLargeFlatSize>(len);
+  }
+
   // Deletes a CordRepFlat instance created previously through a call to New().
   // Flat CordReps are allocated and constructed with raw ::operator new and
   // placement new, and must be destructed and deallocated accordingly.
@@ -117,6 +147,17 @@ struct CordRepFlat : public CordRep {
 #endif
   }
 
+  // Create a CordRepFlat containing `data`, with an optional additional
+  // extra capacity of up to `extra` bytes. Requires that `data.size()`
+  // is less than kMaxFlatLength.
+  static CordRepFlat* Create(absl::string_view data, size_t extra = 0) {
+    assert(data.size() <= kMaxFlatLength);
+    CordRepFlat* flat = New(data.size() + (std::min)(extra, kMaxFlatLength));
+    memcpy(flat->Data(), data.data(), data.size());
+    flat->length = data.size();
+    return flat;
+  }
+
   // Returns a pointer to the data inside this flat rep.
   char* Data() { return reinterpret_cast<char*>(storage); }
   const char* Data() const { return reinterpret_cast<const char*>(storage); }
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_ring.cc b/third_party/abseil-cpp/absl/strings/internal/cord_rep_ring.cc
index 07c77eb3e5..af2fc7683d 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_ring.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_ring.cc
@@ -129,7 +129,9 @@ class CordRepRing::Filler {
   index_type pos_;
 };
 
-constexpr size_t CordRepRing::kMaxCapacity; // NOLINT: needed for c++11
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr size_t CordRepRing::kMaxCapacity;
+#endif
 
 bool CordRepRing::IsValid(std::ostream& output) const {
   if (capacity_ == 0) {
@@ -277,7 +279,7 @@ CordRepRing* CordRepRing::Mutable(CordRepRing* rep, size_t extra) {
   // Get current number of entries, and check for max capacity.
   size_t entries = rep->entries();
 
-  if (!rep->refcount.IsMutable()) {
+  if (!rep->refcount.IsOne()) {
     return Copy(rep, rep->head(), rep->tail(), extra);
   } else if (entries + extra > rep->capacity()) {
     const size_t min_grow = rep->capacity() + rep->capacity() / 2;
@@ -292,10 +294,10 @@ CordRepRing* CordRepRing::Mutable(CordRepRing* rep, size_t extra) {
 }
 
 Span<char> CordRepRing::GetAppendBuffer(size_t size) {
-  assert(refcount.IsMutable());
+  assert(refcount.IsOne());
   index_type back = retreat(tail_);
   CordRep* child = entry_child(back);
-  if (child->tag >= FLAT && child->refcount.IsMutable()) {
+  if (child->tag >= FLAT && child->refcount.IsOne()) {
     size_t capacity = child->flat()->Capacity();
     pos_type end_pos = entry_end_pos(back);
     size_t data_offset = entry_data_offset(back);
@@ -312,10 +314,10 @@ Span<char> CordRepRing::GetAppendBuffer(size_t size) {
 }
 
 Span<char> CordRepRing::GetPrependBuffer(size_t size) {
-  assert(refcount.IsMutable());
+  assert(refcount.IsOne());
   CordRep* child = entry_child(head_);
   size_t data_offset = entry_data_offset(head_);
-  if (data_offset && child->refcount.IsMutable() && child->tag >= FLAT) {
+  if (data_offset && child->refcount.IsOne() && child->tag >= FLAT) {
     size_t n = (std::min)(data_offset, size);
     this->length += n;
     begin_pos_ -= n;
@@ -504,7 +506,7 @@ CordRepRing* CordRepRing::Prepend(CordRepRing* rep, CordRep* child) {
 
 CordRepRing* CordRepRing::Append(CordRepRing* rep, absl::string_view data,
                                  size_t extra) {
-  if (rep->refcount.IsMutable()) {
+  if (rep->refcount.IsOne()) {
     Span<char> avail = rep->GetAppendBuffer(data.length());
     if (!avail.empty()) {
       memcpy(avail.data(), data.data(), avail.length());
@@ -538,7 +540,7 @@ CordRepRing* CordRepRing::Append(CordRepRing* rep, absl::string_view data,
 
 CordRepRing* CordRepRing::Prepend(CordRepRing* rep, absl::string_view data,
                                   size_t extra) {
-  if (rep->refcount.IsMutable()) {
+  if (rep->refcount.IsOne()) {
     Span<char> avail = rep->GetPrependBuffer(data.length());
     if (!avail.empty()) {
       const char* tail = data.data() + data.length() - avail.length();
@@ -678,7 +680,7 @@ CordRepRing* CordRepRing::SubRing(CordRepRing* rep, size_t offset,
   Position tail = rep->FindTail(head.index, offset + len);
   const size_t new_entries = rep->entries(head.index, tail.index);
 
-  if (rep->refcount.IsMutable() && extra <= (rep->capacity() - new_entries)) {
+  if (rep->refcount.IsOne() && extra <= (rep->capacity() - new_entries)) {
     // We adopt a privately owned rep and no extra entries needed.
     if (head.index != rep->head_) UnrefEntries(rep, rep->head_, head.index);
     if (tail.index != rep->tail_) UnrefEntries(rep, tail.index, rep->tail_);
@@ -715,7 +717,7 @@ CordRepRing* CordRepRing::RemovePrefix(CordRepRing* rep, size_t len,
   }
 
   Position head = rep->Find(len);
-  if (rep->refcount.IsMutable()) {
+  if (rep->refcount.IsOne()) {
     if (head.index != rep->head_) UnrefEntries(rep, rep->head_, head.index);
     rep->head_ = head.index;
   } else {
@@ -745,7 +747,7 @@ CordRepRing* CordRepRing::RemoveSuffix(CordRepRing* rep, size_t len,
   }
 
   Position tail = rep->FindTail(rep->length - len);
-  if (rep->refcount.IsMutable()) {
+  if (rep->refcount.IsOne()) {
     // We adopt a privately owned rep, scrub.
     if (tail.index != rep->tail_) UnrefEntries(rep, tail.index, rep->tail_);
     rep->tail_ = tail.index;
diff --git a/third_party/abseil-cpp/absl/strings/internal/cord_rep_test_util.h b/third_party/abseil-cpp/absl/strings/internal/cord_rep_test_util.h
index ad828af2a5..18a0a19544 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cord_rep_test_util.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cord_rep_test_util.h
@@ -42,18 +42,6 @@ inline cord_internal::CordRepSubstring* MakeSubstring(
   return sub;
 }
 
-inline cord_internal::CordRepConcat* MakeConcat(cord_internal::CordRep* left,
-                                                cord_internal::CordRep* right,
-                                                int depth = 0) {
-  auto* concat = new cord_internal::CordRepConcat;
-  concat->tag = cord_internal::CONCAT;
-  concat->length = left->length + right->length;
-  concat->left = left;
-  concat->right = right;
-  concat->set_depth(depth);
-  return concat;
-}
-
 inline cord_internal::CordRepFlat* MakeFlat(absl::string_view value) {
   assert(value.length() <= cord_internal::kMaxFlatLength);
   auto* flat = cord_internal::CordRepFlat::New(value.length());
@@ -126,9 +114,6 @@ inline void CordVisitReps(cord_internal::CordRep* rep, Fn&& fn) {
     for (cord_internal::CordRep* edge : rep->btree()->Edges()) {
       CordVisitReps(edge, fn);
     }
-  } else if (rep->tag == cord_internal::CONCAT) {
-    CordVisitReps(rep->concat()->left, fn);
-    CordVisitReps(rep->concat()->right, fn);
   }
 }
 
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_functions.h b/third_party/abseil-cpp/absl/strings/internal/cordz_functions.h
index c9ba14508a..93f46ec6fe 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_functions.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_functions.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_STRINGS_CORDZ_FUNCTIONS_H_
-#define ABSL_STRINGS_CORDZ_FUNCTIONS_H_
+#ifndef ABSL_STRINGS_INTERNAL_CORDZ_FUNCTIONS_H_
+#define ABSL_STRINGS_INTERNAL_CORDZ_FUNCTIONS_H_
 
 #include <stdint.h>
 
@@ -82,4 +82,4 @@ inline void cordz_set_next_sample_for_testing(int64_t) {}
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_STRINGS_CORDZ_FUNCTIONS_H_
+#endif  // ABSL_STRINGS_INTERNAL_CORDZ_FUNCTIONS_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_handle.h b/third_party/abseil-cpp/absl/strings/internal/cordz_handle.h
index 5df53c782a..3c800b433f 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_handle.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_handle.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_STRINGS_CORDZ_HANDLE_H_
-#define ABSL_STRINGS_CORDZ_HANDLE_H_
+#ifndef ABSL_STRINGS_INTERNAL_CORDZ_HANDLE_H_
+#define ABSL_STRINGS_INTERNAL_CORDZ_HANDLE_H_
 
 #include <atomic>
 #include <vector>
@@ -128,4 +128,4 @@ class CordzSnapshot : public CordzHandle {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_STRINGS_CORDZ_HANDLE_H_
+#endif  // ABSL_STRINGS_INTERNAL_CORDZ_HANDLE_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_info.cc b/third_party/abseil-cpp/absl/strings/internal/cordz_info.cc
index 5c18bbc566..530f33bed4 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_info.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_info.cc
@@ -20,6 +20,7 @@
 #include "absl/debugging/stacktrace.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
+#include "absl/strings/internal/cord_rep_crc.h"
 #include "absl/strings/internal/cord_rep_ring.h"
 #include "absl/strings/internal/cordz_handle.h"
 #include "absl/strings/internal/cordz_statistics.h"
@@ -33,7 +34,9 @@ namespace cord_internal {
 
 using ::absl::base_internal::SpinLockHolder;
 
-constexpr int CordzInfo::kMaxStackDepth;
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr size_t CordzInfo::kMaxStackDepth;
+#endif
 
 ABSL_CONST_INIT CordzInfo::List CordzInfo::global_list_{absl::kConstInit};
 
@@ -81,6 +84,14 @@ class CordRepAnalyzer {
     size_t refcount = rep->refcount.Get();
     RepRef repref{rep, (refcount > 1) ? refcount - 1 : 1};
 
+    // Process the top level CRC node, if present.
+    if (repref.rep->tag == CRC) {
+      statistics_.node_count++;
+      statistics_.node_counts.crc++;
+      memory_usage_.Add(sizeof(CordRepCrc), repref.refcount);
+      repref = repref.Child(repref.rep->crc()->child);
+    }
+
     // Process all top level linear nodes (substrings and flats).
     repref = CountLinearReps(repref, memory_usage_);
 
@@ -89,8 +100,6 @@ class CordRepAnalyzer {
         AnalyzeRing(repref);
       } else if (repref.rep->tag == BTREE) {
         AnalyzeBtree(repref);
-      } else if (repref.rep->tag == CONCAT) {
-        AnalyzeConcat(repref);
       } else {
         // We should have either a concat, btree, or ring node if not null.
         assert(false);
@@ -132,14 +141,6 @@ class CordRepAnalyzer {
     }
   };
 
-  // Returns `rr` if `rr.rep` is not null and a CONCAT type.
-  // Asserts that `rr.rep` is a concat node or null.
-  static RepRef AssertConcat(RepRef repref) {
-    const CordRep* rep = repref.rep;
-    assert(rep == nullptr || rep->tag == CONCAT);
-    return (rep != nullptr && rep->tag == CONCAT) ? repref : RepRef{nullptr, 0};
-  }
-
   // Counts a flat of the provide allocated size
   void CountFlat(size_t size) {
     statistics_.node_count++;
@@ -192,34 +193,6 @@ class CordRepAnalyzer {
     return rep;
   }
 
-  // Analyzes the provided concat node in a flattened recursive way.
-  void AnalyzeConcat(RepRef rep) {
-    absl::InlinedVector<RepRef, 47> pending;
-
-    while (rep.rep != nullptr) {
-      const CordRepConcat* concat = rep.rep->concat();
-      RepRef left = rep.Child(concat->left);
-      RepRef right = rep.Child(concat->right);
-
-      statistics_.node_count++;
-      statistics_.node_counts.concat++;
-      memory_usage_.Add(sizeof(CordRepConcat), rep.refcount);
-
-      right = AssertConcat(CountLinearReps(right, memory_usage_));
-      rep = AssertConcat(CountLinearReps(left, memory_usage_));
-      if (rep.rep != nullptr) {
-        if (right.rep != nullptr) {
-          pending.push_back(right);
-        }
-      } else if (right.rep != nullptr) {
-        rep = right;
-      } else if (!pending.empty()) {
-        rep = pending.back();
-        pending.pop_back();
-      }
-    }
-  }
-
   // Analyzes the provided ring.
   void AnalyzeRing(RepRef rep) {
     statistics_.node_count++;
@@ -318,7 +291,7 @@ CordzInfo::MethodIdentifier CordzInfo::GetParentMethod(const CordzInfo* src) {
                                                            : src->method_;
 }
 
-int CordzInfo::FillParentStack(const CordzInfo* src, void** stack) {
+size_t CordzInfo::FillParentStack(const CordzInfo* src, void** stack) {
   assert(stack);
   if (src == nullptr) return 0;
   if (src->parent_stack_depth_) {
@@ -329,11 +302,14 @@ int CordzInfo::FillParentStack(const CordzInfo* src, void** stack) {
   return src->stack_depth_;
 }
 
-CordzInfo::CordzInfo(CordRep* rep, const CordzInfo* src,
+CordzInfo::CordzInfo(CordRep* rep,
+                     const CordzInfo* src,
                      MethodIdentifier method)
     : rep_(rep),
-      stack_depth_(absl::GetStackTrace(stack_, /*max_depth=*/kMaxStackDepth,
-                                       /*skip_count=*/1)),
+      stack_depth_(
+          static_cast<size_t>(absl::GetStackTrace(stack_,
+                                                  /*max_depth=*/kMaxStackDepth,
+                                                  /*skip_count=*/1))),
       parent_stack_depth_(FillParentStack(src, parent_stack_)),
       method_(method),
       parent_method_(GetParentMethod(src)),
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_info.h b/third_party/abseil-cpp/absl/strings/internal/cordz_info.h
index 026d5b9981..17eaa91c77 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_info.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_info.h
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef ABSL_STRINGS_CORDZ_INFO_H_
-#define ABSL_STRINGS_CORDZ_INFO_H_
+#ifndef ABSL_STRINGS_INTERNAL_CORDZ_INFO_H_
+#define ABSL_STRINGS_INTERNAL_CORDZ_INFO_H_
 
 #include <atomic>
 #include <cstdint>
@@ -196,7 +196,7 @@ class ABSL_LOCKABLE CordzInfo : public CordzHandle {
     std::atomic<CordzInfo*> head ABSL_GUARDED_BY(mutex){nullptr};
   };
 
-  static constexpr int kMaxStackDepth = 64;
+  static constexpr size_t kMaxStackDepth = 64;
 
   explicit CordzInfo(CordRep* rep, const CordzInfo* src,
                      MethodIdentifier method);
@@ -216,7 +216,7 @@ class ABSL_LOCKABLE CordzInfo : public CordzHandle {
   // `stack_` depending on `parent_stack_` being empty, returning the size of
   // the parent stack.
   // Returns 0 if `src` is null.
-  static int FillParentStack(const CordzInfo* src, void** stack);
+  static size_t FillParentStack(const CordzInfo* src, void** stack);
 
   void ODRCheck() const {
 #ifndef NDEBUG
@@ -244,8 +244,8 @@ class ABSL_LOCKABLE CordzInfo : public CordzHandle {
 
   void* stack_[kMaxStackDepth];
   void* parent_stack_[kMaxStackDepth];
-  const int stack_depth_;
-  const int parent_stack_depth_;
+  const size_t stack_depth_;
+  const size_t parent_stack_depth_;
   const MethodIdentifier method_;
   const MethodIdentifier parent_method_;
   CordzUpdateTracker update_tracker_;
@@ -295,4 +295,4 @@ inline CordRep* CordzInfo::RefCordRep() const ABSL_LOCKS_EXCLUDED(mutex_) {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_STRINGS_CORDZ_INFO_H_
+#endif  // ABSL_STRINGS_INTERNAL_CORDZ_INFO_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_info_statistics_test.cc b/third_party/abseil-cpp/absl/strings/internal/cordz_info_statistics_test.cc
index 7430d281ca..6d6feb52bd 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_info_statistics_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_info_statistics_test.cc
@@ -22,6 +22,7 @@
 #include "absl/strings/cord.h"
 #include "absl/strings/internal/cord_internal.h"
 #include "absl/strings/internal/cord_rep_btree.h"
+#include "absl/strings/internal/cord_rep_crc.h"
 #include "absl/strings/internal/cord_rep_flat.h"
 #include "absl/strings/internal/cord_rep_ring.h"
 #include "absl/strings/internal/cordz_info.h"
@@ -61,7 +62,7 @@ CordRepFlat* Flat(size_t size) {
 }
 
 // Creates an external of the specified length
-CordRepExternal* External(int length = 512) {
+CordRepExternal* External(size_t length = 512) {
   return static_cast<CordRepExternal*>(
       NewExternalRep(absl::string_view("", length), [](absl::string_view) {}));
 }
@@ -75,16 +76,6 @@ CordRepSubstring* Substring(CordRep* rep) {
   return substring;
 }
 
-// Creates a concat on the provided reps
-CordRepConcat* Concat(CordRep* left, CordRep* right) {
-  auto* concat = new CordRepConcat;
-  concat->length = left->length + right->length;
-  concat->tag = CONCAT;
-  concat->left = left;
-  concat->right = right;
-  return concat;
-}
-
 // Reference count helper
 struct RefHelper {
   std::vector<CordRep*> refs;
@@ -157,10 +148,6 @@ double FairShareImpl(CordRep* rep, size_t ref) {
     rep->ring()->ForEach([&](CordRepRing::index_type i) {
       self += FairShareImpl(rep->ring()->entry_child(i), 1);
     });
-  } else if (rep->tag == CONCAT) {
-    self = SizeOf(rep->concat());
-    children = FairShareImpl(rep->concat()->left, ref) +
-               FairShareImpl(rep->concat()->right, ref);
   } else {
     assert(false);
   }
@@ -306,80 +293,6 @@ TEST(CordzInfoStatisticsTest, SharedSubstring) {
   EXPECT_THAT(SampleCord(substring), EqStatistics(expected));
 }
 
-TEST(CordzInfoStatisticsTest, Concat) {
-  RefHelper ref;
-  auto* flat1 = Flat(300);
-  auto* flat2 = Flat(2000);
-  auto* concat = ref.NeedsUnref(Concat(flat1, flat2));
-
-  CordzStatistics expected;
-  expected.size = concat->length;
-  expected.estimated_memory_usage =
-      SizeOf(concat) + SizeOf(flat1) + SizeOf(flat2);
-  expected.estimated_fair_share_memory_usage = expected.estimated_memory_usage;
-  expected.node_count = 3;
-  expected.node_counts.flat = 2;
-  expected.node_counts.flat_512 = 1;
-  expected.node_counts.concat = 1;
-
-  EXPECT_THAT(SampleCord(concat), EqStatistics(expected));
-}
-
-TEST(CordzInfoStatisticsTest, DeepConcat) {
-  RefHelper ref;
-  auto* flat1 = Flat(300);
-  auto* flat2 = Flat(2000);
-  auto* flat3 = Flat(400);
-  auto* external = External(3000);
-  auto* substring = Substring(external);
-  auto* concat1 = Concat(flat1, flat2);
-  auto* concat2 = Concat(flat3, substring);
-  auto* concat = ref.NeedsUnref(Concat(concat1, concat2));
-
-  CordzStatistics expected;
-  expected.size = concat->length;
-  expected.estimated_memory_usage = SizeOf(concat) * 3 + SizeOf(flat1) +
-                                    SizeOf(flat2) + SizeOf(flat3) +
-                                    SizeOf(external) + SizeOf(substring);
-  expected.estimated_fair_share_memory_usage = expected.estimated_memory_usage;
-
-  expected.node_count = 8;
-  expected.node_counts.flat = 3;
-  expected.node_counts.flat_512 = 2;
-  expected.node_counts.external = 1;
-  expected.node_counts.concat = 3;
-  expected.node_counts.substring = 1;
-
-  EXPECT_THAT(SampleCord(concat), EqStatistics(expected));
-}
-
-TEST(CordzInfoStatisticsTest, DeepSharedConcat) {
-  RefHelper ref;
-  auto* flat1 = Flat(40);
-  auto* flat2 = ref.Ref(Flat(2000), 4);
-  auto* flat3 = Flat(70);
-  auto* external = ref.Ref(External(3000));
-  auto* substring = ref.Ref(Substring(external), 3);
-  auto* concat1 = Concat(flat1, flat2);
-  auto* concat2 = Concat(flat3, substring);
-  auto* concat = ref.Ref(ref.NeedsUnref(Concat(concat1, concat2)));
-
-  CordzStatistics expected;
-  expected.size = concat->length;
-  expected.estimated_memory_usage = SizeOf(concat) * 3 + SizeOf(flat1) +
-                                    SizeOf(flat2) + SizeOf(flat3) +
-                                    SizeOf(external) + SizeOf(substring);
-  expected.estimated_fair_share_memory_usage = FairShare(concat);
-  expected.node_count = 8;
-  expected.node_counts.flat = 3;
-  expected.node_counts.flat_64 = 1;
-  expected.node_counts.flat_128 = 1;
-  expected.node_counts.external = 1;
-  expected.node_counts.concat = 3;
-  expected.node_counts.substring = 1;
-
-  EXPECT_THAT(SampleCord(concat), EqStatistics(expected));
-}
 
 TEST(CordzInfoStatisticsTest, Ring) {
   RefHelper ref;
@@ -439,7 +352,7 @@ TEST(CordzInfoStatisticsTest, SharedSubstringRing) {
 }
 
 TEST(CordzInfoStatisticsTest, BtreeLeaf) {
-  ASSERT_THAT(CordRepBtree::kMaxCapacity, Ge(3));
+  ASSERT_THAT(CordRepBtree::kMaxCapacity, Ge(3u));
   RefHelper ref;
   auto* flat1 = Flat(2000);
   auto* flat2 = Flat(200);
@@ -479,7 +392,7 @@ TEST(CordzInfoStatisticsTest, BtreeNodeShared) {
   RefHelper ref;
   static constexpr int leaf_count = 3;
   const size_t flat3_count = CordRepBtree::kMaxCapacity - 3;
-  ASSERT_THAT(flat3_count, Ge(0));
+  ASSERT_THAT(flat3_count, Ge(0u));
 
   CordRepBtree* tree = nullptr;
   size_t mem_size = 0;
@@ -535,6 +448,23 @@ TEST(CordzInfoStatisticsTest, BtreeNodeShared) {
   EXPECT_THAT(SampleCord(tree), EqStatistics(expected));
 }
 
+TEST(CordzInfoStatisticsTest, Crc) {
+  RefHelper ref;
+  auto* left = Flat(1000);
+  auto* crc = ref.NeedsUnref(CordRepCrc::New(left, 12345));
+
+  CordzStatistics expected;
+  expected.size = left->length;
+  expected.estimated_memory_usage = SizeOf(crc) + SizeOf(left);
+  expected.estimated_fair_share_memory_usage = expected.estimated_memory_usage;
+  expected.node_count = 2;
+  expected.node_counts.flat = 1;
+  expected.node_counts.flat_1k = 1;
+  expected.node_counts.crc = 1;
+
+  EXPECT_THAT(SampleCord(crc), EqStatistics(expected));
+}
+
 TEST(CordzInfoStatisticsTest, ThreadSafety) {
   Notification stop;
   static constexpr int kNumThreads = 8;
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_info_test.cc b/third_party/abseil-cpp/absl/strings/internal/cordz_info_test.cc
index b98343ae79..cd226c3ed5 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_info_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_info_test.cc
@@ -124,7 +124,7 @@ TEST(CordzInfoTest, UntrackCord) {
   CordzInfo* info = data.data.cordz_info();
 
   info->Untrack();
-  EXPECT_THAT(DeleteQueue(), SizeIs(0));
+  EXPECT_THAT(DeleteQueue(), SizeIs(0u));
 }
 
 TEST(CordzInfoTest, UntrackCordWithSnapshot) {
@@ -263,8 +263,9 @@ TEST(CordzInfoTest, StackV2) {
   // resultant formatted stack will be "", but that still equals the stack
   // recorded in CordzInfo, which is also empty. The skip_count is 1 so that the
   // line number of the current stack isn't included in the HasSubstr check.
-  local_stack.resize(absl::GetStackTrace(local_stack.data(), kMaxStackDepth,
-                                         /*skip_count=*/1));
+  local_stack.resize(static_cast<size_t>(
+      absl::GetStackTrace(local_stack.data(), kMaxStackDepth,
+                          /*skip_count=*/1)));
 
   std::string got_stack = FormatStack(info->GetStack());
   std::string expected_stack = FormatStack(local_stack);
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token.h b/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token.h
index 28a1d70ccc..b58022c3f9 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token.h
@@ -16,8 +16,8 @@
 #include "absl/strings/internal/cordz_handle.h"
 #include "absl/strings/internal/cordz_info.h"
 
-#ifndef ABSL_STRINGS_CORDZ_SAMPLE_TOKEN_H_
-#define ABSL_STRINGS_CORDZ_SAMPLE_TOKEN_H_
+#ifndef ABSL_STRINGS_INTERNAL_CORDZ_SAMPLE_TOKEN_H_
+#define ABSL_STRINGS_INTERNAL_CORDZ_SAMPLE_TOKEN_H_
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -94,4 +94,4 @@ class CordzSampleToken : public CordzSnapshot {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ABSL_STRINGS_CORDZ_SAMPLE_TOKEN_H_
+#endif  // ABSL_STRINGS_INTERNAL_CORDZ_SAMPLE_TOKEN_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token_test.cc b/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token_test.cc
index 9f54301d68..6be1770d59 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_sample_token_test.cc
@@ -167,7 +167,7 @@ TEST(CordzSampleTokenTest, MultiThreaded) {
           if (cord.data.is_profiled()) {
             // 1) Untrack
             cord.data.cordz_info()->Untrack();
-            cord.data.clear_cordz_info();;
+            cord.data.clear_cordz_info();
           } else {
             // 2) Track
             CordzInfo::TrackCord(cord.data, kTrackCordMethod);
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_statistics.h b/third_party/abseil-cpp/absl/strings/internal/cordz_statistics.h
index da4c7dbb8c..9f558df494 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_statistics.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_statistics.h
@@ -41,15 +41,16 @@ struct CordzStatistics {
     size_t concat = 0;     // #concat reps
     size_t ring = 0;       // #ring buffer reps
     size_t btree = 0;      // #btree reps
+    size_t crc = 0;        // #crc reps
   };
 
   // The size of the cord in bytes. This matches the result of Cord::size().
-  int64_t size = 0;
+  size_t size = 0;
 
   // The estimated memory used by the sampled cord. This value matches the
   // value as reported by Cord::EstimatedMemoryUsage().
   // A value of 0 implies the property has not been recorded.
-  int64_t estimated_memory_usage = 0;
+  size_t estimated_memory_usage = 0;
 
   // The effective memory used by the sampled cord, inversely weighted by the
   // effective indegree of each allocated node. This is a representation of the
@@ -58,14 +59,14 @@ struct CordzStatistics {
   // by multiple Cord instances, and for cases where a Cord includes the same
   // node multiple times (either directly or indirectly).
   // A value of 0 implies the property has not been recorded.
-  int64_t estimated_fair_share_memory_usage = 0;
+  size_t estimated_fair_share_memory_usage = 0;
 
   // The total number of nodes referenced by this cord.
   // For ring buffer Cords, this includes the 'ring buffer' node.
   // For btree Cords, this includes all 'CordRepBtree' tree nodes as well as all
   // the substring, flat and external nodes referenced by the tree.
   // A value of 0 implies the property has not been recorded.
-  int64_t node_count = 0;
+  size_t node_count = 0;
 
   // Detailed node counts per type
   NodeCounts node_counts;
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker.h b/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker.h
index 1f764486eb..c5170662bf 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker.h
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker.h
@@ -39,8 +39,8 @@ class CordzUpdateTracker {
   // Tracked update methods.
   enum MethodIdentifier {
     kUnknown,
-    kAppendBuffer,
     kAppendCord,
+    kAppendCordBuffer,
     kAppendExternalMemory,
     kAppendString,
     kAssignCord,
@@ -50,16 +50,18 @@ class CordzUpdateTracker {
     kConstructorString,
     kCordReader,
     kFlatten,
+    kGetAppendBuffer,
     kGetAppendRegion,
     kMakeCordFromExternal,
     kMoveAppendCord,
     kMoveAssignCord,
     kMovePrependCord,
-    kPrependBuffer,
     kPrependCord,
+    kPrependCordBuffer,
     kPrependString,
     kRemovePrefix,
     kRemoveSuffix,
+    kSetExpectedChecksum,
     kSubCord,
 
     // kNumMethods defines the number of entries: must be the last entry.
diff --git a/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker_test.cc b/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker_test.cc
index 2348a17585..9b1f798659 100644
--- a/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/cordz_update_tracker_test.cc
@@ -37,8 +37,8 @@ using Methods = std::array<Method, Method::kNumMethods>;
 // Returns an array of all methods defined in `MethodIdentifier`
 Methods AllMethods() {
   return Methods{Method::kUnknown,
-                 Method::kAppendBuffer,
                  Method::kAppendCord,
+                 Method::kAppendCordBuffer,
                  Method::kAppendExternalMemory,
                  Method::kAppendString,
                  Method::kAssignCord,
@@ -48,16 +48,18 @@ Methods AllMethods() {
                  Method::kConstructorString,
                  Method::kCordReader,
                  Method::kFlatten,
+                 Method::kGetAppendBuffer,
                  Method::kGetAppendRegion,
                  Method::kMakeCordFromExternal,
                  Method::kMoveAppendCord,
                  Method::kMoveAssignCord,
                  Method::kMovePrependCord,
-                 Method::kPrependBuffer,
                  Method::kPrependCord,
+                 Method::kPrependCordBuffer,
                  Method::kPrependString,
                  Method::kRemovePrefix,
                  Method::kRemoveSuffix,
+                 Method::kSetExpectedChecksum,
                  Method::kSubCord};
 }
 
diff --git a/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance.cc b/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance.cc
new file mode 100644
index 0000000000..a084568fa8
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance.cc
@@ -0,0 +1,93 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/damerau_levenshtein_distance.h"
+
+#include <algorithm>
+#include <array>
+#include <numeric>
+
+#include "absl/strings/string_view.h"
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace strings_internal {
+// Calculate DamerauLevenshtein (adjacent transpositions) distance
+// between two strings,
+// https://en.wikipedia.org/wiki/Damerau%E2%80%93Levenshtein_distance. The
+// algorithm follows the condition that no substring is edited more than once.
+// While this can reduce is larger distance, it's a) a much simpler algorithm
+// and b) more realistic for the case that typographic mistakes should be
+// detected.
+// When the distance is larger than cutoff, or one of the strings has more
+// than MAX_SIZE=100 characters, the code returns min(MAX_SIZE, cutoff) + 1.
+uint8_t CappedDamerauLevenshteinDistance(absl::string_view s1,
+                                         absl::string_view s2, uint8_t cutoff) {
+  const uint8_t MAX_SIZE = 100;
+  const uint8_t _cutoff = std::min(MAX_SIZE, cutoff);
+  const uint8_t cutoff_plus_1 = static_cast<uint8_t>(_cutoff + 1);
+
+  if (s1.size() > s2.size()) std::swap(s1, s2);
+  if (s1.size() + _cutoff < s2.size() || s2.size() > MAX_SIZE)
+    return cutoff_plus_1;
+
+  if (s1.empty())
+    return static_cast<uint8_t>(s2.size());
+
+  // Lower diagonal bound: y = x - lower_diag
+  const uint8_t lower_diag =
+      _cutoff - static_cast<uint8_t>(s2.size() - s1.size());
+  // Upper diagonal bound: y = x + upper_diag
+  const uint8_t upper_diag = _cutoff;
+
+  // d[i][j] is the number of edits required to convert s1[0, i] to s2[0, j]
+  std::array<std::array<uint8_t, MAX_SIZE + 2>, MAX_SIZE + 2> d;
+  std::iota(d[0].begin(), d[0].begin() + upper_diag + 1, 0);
+  d[0][cutoff_plus_1] = cutoff_plus_1;
+  for (size_t i = 1; i <= s1.size(); ++i) {
+    // Deduce begin of relevant window.
+    size_t j_begin = 1;
+    if (i > lower_diag) {
+      j_begin = i - lower_diag;
+      d[i][j_begin - 1] = cutoff_plus_1;
+    } else {
+      d[i][0] = static_cast<uint8_t>(i);
+    }
+
+    // Deduce end of relevant window.
+    size_t j_end = i + upper_diag;
+    if (j_end > s2.size()) {
+      j_end = s2.size();
+    } else {
+      d[i][j_end + 1] = cutoff_plus_1;
+    }
+
+    for (size_t j = j_begin; j <= j_end; ++j) {
+      const uint8_t deletion_distance = d[i - 1][j] + 1;
+      const uint8_t insertion_distance = d[i][j - 1] + 1;
+      const uint8_t mismatched_tail_cost = s1[i - 1] == s2[j - 1] ? 0 : 1;
+      const uint8_t mismatch_distance = d[i - 1][j - 1] + mismatched_tail_cost;
+      uint8_t transposition_distance = _cutoff + 1;
+      if (i > 1 && j > 1 && s1[i - 1] == s2[j - 2] && s1[i - 2] == s2[j - 1])
+        transposition_distance = d[i - 2][j - 2] + 1;
+      d[i][j] = std::min({cutoff_plus_1, deletion_distance, insertion_distance,
+                          mismatch_distance, transposition_distance});
+    }
+  }
+  return d[s1.size()][s2.size()];
+}
+
+}  // namespace strings_internal
+
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance.h b/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance.h
new file mode 100644
index 0000000000..1a9684254a
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance.h
@@ -0,0 +1,35 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_STRINGS_INTERNAL_DAMERAU_LEVENSHTEIN_DISTANCE_H_
+#define ABSL_STRINGS_INTERNAL_DAMERAU_LEVENSHTEIN_DISTANCE_H_
+
+#include <numeric>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace strings_internal {
+// Calculate DamerauLevenshtein distance between two strings.
+// When the distance is larger than cutoff, the code just returns cutoff + 1.
+uint8_t CappedDamerauLevenshteinDistance(absl::string_view s1,
+                                         absl::string_view s2, uint8_t cutoff);
+
+}  // namespace strings_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_INTERNAL_DAMERAU_LEVENSHTEIN_DISTANCE_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance_test.cc b/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance_test.cc
new file mode 100644
index 0000000000..a342b7db54
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/damerau_levenshtein_distance_test.cc
@@ -0,0 +1,99 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/damerau_levenshtein_distance.h"
+
+#include <cstdint>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+using absl::strings_internal::CappedDamerauLevenshteinDistance;
+
+TEST(Distance, TestDistances) {
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("ab", "ab", 6), uint8_t{0});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("a", "b", 6), uint8_t{1});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("ca", "abc", 6), uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcd", "ad", 6), uint8_t{2});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcd", "cadb", 6), uint8_t{4});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcd", "bdac", 6), uint8_t{4});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("ab", "ab", 0), uint8_t{0});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("", "", 0), uint8_t{0});
+  // combinations for 3-character strings:
+  // 1, 2, 3 removals, insertions or replacements and transpositions
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abc", "abc", 6), uint8_t{0});
+  for (auto res :
+       {"", "ca", "efg", "ea", "ce", "ceb", "eca", "cae", "cea", "bea"}) {
+    EXPECT_THAT(CappedDamerauLevenshteinDistance("abc", res, 6), uint8_t{3});
+    EXPECT_THAT(CappedDamerauLevenshteinDistance(res, "abc", 6), uint8_t{3});
+  }
+  for (auto res :
+       {"a",   "b",   "c",   "ba",  "cb",  "bca", "cab", "cba", "ace",
+        "efc", "ebf", "aef", "ae",  "be",  "eb",  "ec",  "ecb", "bec",
+        "bce", "cbe", "ace", "eac", "aeb", "bae", "eab", "eba"}) {
+    EXPECT_THAT(CappedDamerauLevenshteinDistance("abc", res, 6), uint8_t{2});
+    EXPECT_THAT(CappedDamerauLevenshteinDistance(res, "abc", 6), uint8_t{2});
+  }
+  for (auto res : {"ab", "ac", "bc", "acb", "bac", "ebc", "aec", "abe"}) {
+    EXPECT_THAT(CappedDamerauLevenshteinDistance("abc", res, 6), uint8_t{1});
+    EXPECT_THAT(CappedDamerauLevenshteinDistance(res, "abc", 6), uint8_t{1});
+  }
+}
+
+TEST(Distance, TestCutoff) {
+  // Returing cutoff + 1 if the value is larger than cutoff or string longer
+  // than MAX_SIZE.
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcd", "a", 3), uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcd", "a", 2), uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcd", "a", 1), uint8_t{2});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("abcdefg", "a", 2), uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance("a", "abcde", 2), uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(102, 'a'),
+                                               std::string(102, 'a'), 105),
+              uint8_t{101});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(100, 'a'),
+                                               std::string(100, 'a'), 100),
+              uint8_t{0});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(100, 'a'),
+                                               std::string(100, 'b'), 100),
+              uint8_t{100});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(100, 'a'),
+                                               std::string(99, 'a'), 2),
+              uint8_t{1});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(100, 'a'),
+                                               std::string(101, 'a'), 2),
+              uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(100, 'a'),
+                                               std::string(101, 'a'), 2),
+              uint8_t{3});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(UINT8_MAX + 1, 'a'),
+                                               std::string(UINT8_MAX + 1, 'b'),
+                                               UINT8_MAX),
+              uint8_t{101});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(UINT8_MAX - 1, 'a'),
+                                               std::string(UINT8_MAX - 1, 'b'),
+                                               UINT8_MAX),
+              uint8_t{101});
+  EXPECT_THAT(
+      CappedDamerauLevenshteinDistance(std::string(UINT8_MAX, 'a'),
+                                       std::string(UINT8_MAX, 'b'), UINT8_MAX),
+      uint8_t{101});
+  EXPECT_THAT(CappedDamerauLevenshteinDistance(std::string(UINT8_MAX - 1, 'a'),
+                                               std::string(UINT8_MAX - 1, 'a'),
+                                               UINT8_MAX),
+              uint8_t{101});
+}
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/strings/internal/escaping.cc b/third_party/abseil-cpp/absl/strings/internal/escaping.cc
index c5271286ad..cfea096111 100644
--- a/third_party/abseil-cpp/absl/strings/internal/escaping.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/escaping.cc
@@ -21,7 +21,7 @@ namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace strings_internal {
 
-const char kBase64Chars[] =
+ABSL_CONST_INIT const char kBase64Chars[] =
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
 size_t CalculateBase64EscapedLenInternal(size_t input_len, bool do_padding) {
@@ -102,8 +102,8 @@ size_t Base64EscapeInternal(const unsigned char* src, size_t szsrc, char* dest,
     }
   }
   // To save time, we didn't update szdest or szsrc in the loop.  So do it now.
-  szdest = limit_dest - cur_dest;
-  szsrc = limit_src - cur_src;
+  szdest = static_cast<size_t>(limit_dest - cur_dest);
+  szsrc = static_cast<size_t>(limit_src - cur_src);
 
   /* now deal with the tail (<=3 bytes) */
   switch (szsrc) {
@@ -154,7 +154,8 @@ size_t Base64EscapeInternal(const unsigned char* src, size_t szsrc, char* dest,
       // the loop because the loop above always reads 4 bytes, and the fourth
       // byte is past the end of the input.
       if (szdest < 4) return 0;
-      uint32_t in = (cur_src[0] << 16) + absl::big_endian::Load16(cur_src + 1);
+      uint32_t in =
+          (uint32_t{cur_src[0]} << 16) + absl::big_endian::Load16(cur_src + 1);
       cur_dest[0] = base64[in >> 18];
       in &= 0x3FFFF;
       cur_dest[1] = base64[in >> 12];
@@ -172,7 +173,7 @@ size_t Base64EscapeInternal(const unsigned char* src, size_t szsrc, char* dest,
       ABSL_RAW_LOG(FATAL, "Logic problem? szsrc = %zu", szsrc);
       break;
   }
-  return (cur_dest - dest);
+  return static_cast<size_t>(cur_dest - dest);
 }
 
 }  // namespace strings_internal
diff --git a/third_party/abseil-cpp/absl/strings/internal/memutil.cc b/third_party/abseil-cpp/absl/strings/internal/memutil.cc
index 2519c6881e..44996a7549 100644
--- a/third_party/abseil-cpp/absl/strings/internal/memutil.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/memutil.cc
@@ -54,10 +54,11 @@ size_t memspn(const char* s, size_t slen, const char* accept) {
 
 cont:
   c = *p++;
-  if (slen-- == 0) return p - 1 - s;
+  if (slen-- == 0)
+    return static_cast<size_t>(p - 1 - s);
   for (spanp = accept; (sc = *spanp++) != '\0';)
     if (sc == c) goto cont;
-  return p - 1 - s;
+  return static_cast<size_t>(p - 1 - s);
 }
 
 size_t memcspn(const char* s, size_t slen, const char* reject) {
@@ -68,9 +69,10 @@ size_t memcspn(const char* s, size_t slen, const char* reject) {
   while (slen-- != 0) {
     c = *p++;
     for (spanp = reject; (sc = *spanp++) != '\0';)
-      if (sc == c) return p - 1 - s;
+      if (sc == c)
+        return static_cast<size_t>(p - 1 - s);
   }
-  return p - s;
+  return static_cast<size_t>(p - s);
 }
 
 char* mempbrk(const char* s, size_t slen, const char* accept) {
@@ -97,8 +99,9 @@ const char* memmatch(const char* phaystack, size_t haylen, const char* pneedle,
   const char* hayend = phaystack + haylen - neelen + 1;
   // A static cast is used here to work around the fact that memchr returns
   // a void* on Posix-compliant systems and const void* on Windows.
-  while ((match = static_cast<const char*>(
-              memchr(phaystack, pneedle[0], hayend - phaystack)))) {
+  while (
+      (match = static_cast<const char*>(memchr(
+           phaystack, pneedle[0], static_cast<size_t>(hayend - phaystack))))) {
     if (memcmp(match, pneedle, neelen) == 0)
       return match;
     else
diff --git a/third_party/abseil-cpp/absl/strings/internal/ostringstream.cc b/third_party/abseil-cpp/absl/strings/internal/ostringstream.cc
index 05324c780c..a0e5ec08c2 100644
--- a/third_party/abseil-cpp/absl/strings/internal/ostringstream.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/ostringstream.cc
@@ -14,20 +14,27 @@
 
 #include "absl/strings/internal/ostringstream.h"
 
+#include <cassert>
+#include <cstddef>
+#include <ios>
+#include <streambuf>
+
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 namespace strings_internal {
 
-OStringStream::Buf::int_type OStringStream::overflow(int c) {
-  assert(s_);
-  if (!Buf::traits_type::eq_int_type(c, Buf::traits_type::eof()))
-    s_->push_back(static_cast<char>(c));
+OStringStream::Streambuf::int_type OStringStream::Streambuf::overflow(int c) {
+  assert(str_);
+  if (!std::streambuf::traits_type::eq_int_type(
+          c, std::streambuf::traits_type::eof()))
+    str_->push_back(static_cast<char>(c));
   return 1;
 }
 
-std::streamsize OStringStream::xsputn(const char* s, std::streamsize n) {
-  assert(s_);
-  s_->append(s, n);
+std::streamsize OStringStream::Streambuf::xsputn(const char* s,
+                                                 std::streamsize n) {
+  assert(str_);
+  str_->append(s, static_cast<size_t>(n));
   return n;
 }
 
diff --git a/third_party/abseil-cpp/absl/strings/internal/ostringstream.h b/third_party/abseil-cpp/absl/strings/internal/ostringstream.h
index d25d60473f..c0e237dbe8 100644
--- a/third_party/abseil-cpp/absl/strings/internal/ostringstream.h
+++ b/third_party/abseil-cpp/absl/strings/internal/ostringstream.h
@@ -16,11 +16,13 @@
 #define ABSL_STRINGS_INTERNAL_OSTRINGSTREAM_H_
 
 #include <cassert>
+#include <ios>
 #include <ostream>
 #include <streambuf>
 #include <string>
+#include <utility>
 
-#include "absl/base/port.h"
+#include "absl/base/config.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -60,26 +62,49 @@ namespace strings_internal {
 //   strm << 3.14;
 //
 // Note: flush() has no effect. No reason to call it.
-class OStringStream : private std::basic_streambuf<char>, public std::ostream {
+class OStringStream final : public std::ostream {
  public:
   // The argument can be null, in which case you'll need to call str(p) with a
   // non-null argument before you can write to the stream.
   //
   // The destructor of OStringStream doesn't use the std::string. It's OK to
   // destroy the std::string before the stream.
-  explicit OStringStream(std::string* s) : std::ostream(this), s_(s) {}
+  explicit OStringStream(std::string* str)
+      : std::ostream(&buf_), buf_(str) {}
+  OStringStream(OStringStream&& that)
+      : std::ostream(std::move(static_cast<std::ostream&>(that))),
+        buf_(that.buf_) {
+    rdbuf(&buf_);
+  }
+  OStringStream& operator=(OStringStream&& that) {
+    std::ostream::operator=(std::move(static_cast<std::ostream&>(that)));
+    buf_ = that.buf_;
+    rdbuf(&buf_);
+    return *this;
+  }
 
-  std::string* str() { return s_; }
-  const std::string* str() const { return s_; }
-  void str(std::string* s) { s_ = s; }
+  std::string* str() { return buf_.str(); }
+  const std::string* str() const { return buf_.str(); }
+  void str(std::string* str) { buf_.str(str); }
 
  private:
-  using Buf = std::basic_streambuf<char>;
+  class Streambuf final : public std::streambuf {
+   public:
+    explicit Streambuf(std::string* str) : str_(str) {}
+    Streambuf(const Streambuf&) = default;
+    Streambuf& operator=(const Streambuf&) = default;
 
-  Buf::int_type overflow(int c) override;
-  std::streamsize xsputn(const char* s, std::streamsize n) override;
+    std::string* str() { return str_; }
+    const std::string* str() const { return str_; }
+    void str(std::string* str) { str_ = str; }
 
-  std::string* s_;
+   protected:
+    int_type overflow(int c) override;
+    std::streamsize xsputn(const char* s, std::streamsize n) override;
+
+   private:
+    std::string* str_;
+  } buf_;
 };
 
 }  // namespace strings_internal
diff --git a/third_party/abseil-cpp/absl/strings/internal/ostringstream_test.cc b/third_party/abseil-cpp/absl/strings/internal/ostringstream_test.cc
index 2879e50eb3..ef3ad573e9 100644
--- a/third_party/abseil-cpp/absl/strings/internal/ostringstream_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/ostringstream_test.cc
@@ -14,10 +14,12 @@
 
 #include "absl/strings/internal/ostringstream.h"
 
+#include <ios>
 #include <memory>
 #include <ostream>
 #include <string>
 #include <type_traits>
+#include <utility>
 
 #include "gtest/gtest.h"
 
@@ -29,24 +31,51 @@ TEST(OStringStream, IsOStream) {
       "");
 }
 
-TEST(OStringStream, ConstructDestroy) {
+TEST(OStringStream, ConstructNullptr) {
+  absl::strings_internal::OStringStream strm(nullptr);
+  EXPECT_EQ(nullptr, strm.str());
+}
+
+TEST(OStringStream, ConstructStr) {
+  std::string s = "abc";
   {
-    absl::strings_internal::OStringStream strm(nullptr);
-    EXPECT_EQ(nullptr, strm.str());
+    absl::strings_internal::OStringStream strm(&s);
+    EXPECT_EQ(&s, strm.str());
   }
+  EXPECT_EQ("abc", s);
+}
+
+TEST(OStringStream, Destroy) {
+  std::unique_ptr<std::string> s(new std::string);
+  absl::strings_internal::OStringStream strm(s.get());
+  s.reset();
+}
+
+TEST(OStringStream, MoveConstruct) {
+  std::string s = "abc";
   {
-    std::string s = "abc";
-    {
-      absl::strings_internal::OStringStream strm(&s);
-      EXPECT_EQ(&s, strm.str());
-    }
-    EXPECT_EQ("abc", s);
+    absl::strings_internal::OStringStream strm1(&s);
+    strm1 << std::hex << 16;
+    EXPECT_EQ(&s, strm1.str());
+    absl::strings_internal::OStringStream strm2(std::move(strm1));
+    strm2 << 16;  // We should still be in base 16.
+    EXPECT_EQ(&s, strm2.str());
   }
+  EXPECT_EQ("abc1010", s);
+}
+
+TEST(OStringStream, MoveAssign) {
+  std::string s = "abc";
   {
-    std::unique_ptr<std::string> s(new std::string);
-    absl::strings_internal::OStringStream strm(s.get());
-    s.reset();
+    absl::strings_internal::OStringStream strm1(&s);
+    strm1 << std::hex << 16;
+    EXPECT_EQ(&s, strm1.str());
+    absl::strings_internal::OStringStream strm2(nullptr);
+    strm2 = std::move(strm1);
+    strm2 << 16;  // We should still be in base 16.
+    EXPECT_EQ(&s, strm2.str());
   }
+  EXPECT_EQ("abc1010", s);
 }
 
 TEST(OStringStream, Str) {
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/arg.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/arg.cc
index e28a29b171..967fe9ca26 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/arg.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/arg.cc
@@ -77,7 +77,7 @@ class IntDigits {
       v >>= 3;
     } while (v);
     start_ = p;
-    size_ = storage_ + sizeof(storage_) - p;
+    size_ = static_cast<size_t>(storage_ + sizeof(storage_) - p);
   }
 
   // Print the signed or unsigned integer as decimal.
@@ -86,7 +86,8 @@ class IntDigits {
   void PrintAsDec(T v) {
     static_assert(std::is_integral<T>::value, "");
     start_ = storage_;
-    size_ = numbers_internal::FastIntToBuffer(v, storage_) - storage_;
+    size_ = static_cast<size_t>(numbers_internal::FastIntToBuffer(v, storage_) -
+                                storage_);
   }
 
   void PrintAsDec(int128 v) {
@@ -115,7 +116,7 @@ class IntDigits {
     if (add_neg) {
       *--p = '-';
     }
-    size_ = storage_ + sizeof(storage_) - p;
+    size_ = static_cast<size_t>(storage_ + sizeof(storage_) - p);
     start_ = p;
   }
 
@@ -138,7 +139,7 @@ class IntDigits {
       ++p;
     }
     start_ = p;
-    size_ = storage_ + sizeof(storage_) - p;
+    size_ = static_cast<size_t>(storage_ + sizeof(storage_) - p);
   }
 
   // Print the unsigned integer as hex using uppercase.
@@ -154,7 +155,7 @@ class IntDigits {
       v >>= 4;
     } while (v);
     start_ = p;
-    size_ = storage_ + sizeof(storage_) - p;
+    size_ = static_cast<size_t>(storage_ + sizeof(storage_) - p);
   }
 
   // The printed value including the '-' sign if available.
@@ -208,10 +209,12 @@ string_view SignColumn(bool neg, const FormatConversionSpecImpl conv) {
   return {};
 }
 
-bool ConvertCharImpl(unsigned char v, const FormatConversionSpecImpl conv,
-                     FormatSinkImpl *sink) {
+bool ConvertCharImpl(char v,
+                     const FormatConversionSpecImpl conv,
+                     FormatSinkImpl* sink) {
   size_t fill = 0;
-  if (conv.width() >= 0) fill = conv.width();
+  if (conv.width() >= 0)
+    fill = static_cast<size_t>(conv.width());
   ReducePadding(1, &fill);
   if (!conv.has_left_flag()) sink->Append(fill, ' ');
   sink->Append(1, v);
@@ -225,7 +228,8 @@ bool ConvertIntImplInnerSlow(const IntDigits &as_digits,
   // Print as a sequence of Substrings:
   //   [left_spaces][sign][base_indicator][zeroes][formatted][right_spaces]
   size_t fill = 0;
-  if (conv.width() >= 0) fill = conv.width();
+  if (conv.width() >= 0)
+    fill = static_cast<size_t>(conv.width());
 
   string_view formatted = as_digits.without_neg_or_zero();
   ReducePadding(formatted, &fill);
@@ -236,10 +240,9 @@ bool ConvertIntImplInnerSlow(const IntDigits &as_digits,
   string_view base_indicator = BaseIndicator(as_digits, conv);
   ReducePadding(base_indicator, &fill);
 
-  int precision = conv.precision();
-  bool precision_specified = precision >= 0;
-  if (!precision_specified)
-    precision = 1;
+  bool precision_specified = conv.precision() >= 0;
+  size_t precision =
+      precision_specified ? static_cast<size_t>(conv.precision()) : size_t{1};
 
   if (conv.has_alt_flag() &&
       conv.conversion_char() == FormatConversionCharInternal::o) {
@@ -247,7 +250,7 @@ bool ConvertIntImplInnerSlow(const IntDigits &as_digits,
     //   "For o conversion, it increases the precision (if necessary) to
     //   force the first digit of the result to be zero."
     if (formatted.empty() || *formatted.begin() != '0') {
-      int needed = static_cast<int>(formatted.size()) + 1;
+      size_t needed = formatted.size() + 1;
       precision = std::max(precision, needed);
     }
   }
@@ -275,19 +278,40 @@ bool ConvertIntImplInnerSlow(const IntDigits &as_digits,
   return true;
 }
 
+template <typename T,
+          typename std::enable_if<(std::is_integral<T>::value &&
+                                   std::is_signed<T>::value) ||
+                                      std::is_same<T, int128>::value,
+                                  int>::type = 0>
+constexpr auto ConvertV(T) {
+  return FormatConversionCharInternal::d;
+}
+
+template <typename T,
+          typename std::enable_if<(std::is_integral<T>::value &&
+                                   std::is_unsigned<T>::value) ||
+                                      std::is_same<T, uint128>::value,
+                                  int>::type = 0>
+constexpr auto ConvertV(T) {
+  return FormatConversionCharInternal::u;
+}
+
 template <typename T>
-bool ConvertIntArg(T v, const FormatConversionSpecImpl conv,
-                   FormatSinkImpl *sink) {
+bool ConvertIntArg(T v, FormatConversionSpecImpl conv, FormatSinkImpl *sink) {
   using U = typename MakeUnsigned<T>::type;
   IntDigits as_digits;
 
+  if (conv.conversion_char() == FormatConversionCharInternal::v) {
+    conv.set_conversion_char(ConvertV(T{}));
+  }
+
   // This odd casting is due to a bug in -Wswitch behavior in gcc49 which causes
   // it to complain about a switch/case type mismatch, even though both are
   // FormatConverionChar.  Likely this is because at this point
   // FormatConversionChar is declared, but not defined.
   switch (static_cast<uint8_t>(conv.conversion_char())) {
     case static_cast<uint8_t>(FormatConversionCharInternal::c):
-      return ConvertCharImpl(static_cast<unsigned char>(v), conv, sink);
+      return ConvertCharImpl(static_cast<char>(v), conv, sink);
 
     case static_cast<uint8_t>(FormatConversionCharInternal::o):
       as_digits.PrintAsOct(static_cast<U>(v));
@@ -320,7 +344,7 @@ bool ConvertIntArg(T v, const FormatConversionSpecImpl conv,
       return ConvertFloatImpl(static_cast<double>(v), conv, sink);
 
     default:
-       ABSL_INTERNAL_ASSUME(false);
+      ABSL_ASSUME(false);
   }
 
   if (conv.is_basic()) {
@@ -331,8 +355,11 @@ bool ConvertIntArg(T v, const FormatConversionSpecImpl conv,
 }
 
 template <typename T>
-bool ConvertFloatArg(T v, const FormatConversionSpecImpl conv,
-                     FormatSinkImpl *sink) {
+bool ConvertFloatArg(T v, FormatConversionSpecImpl conv, FormatSinkImpl *sink) {
+  if (conv.conversion_char() == FormatConversionCharInternal::v) {
+    conv.set_conversion_char(FormatConversionCharInternal::g);
+  }
+
   return FormatConversionCharIsFloat(conv.conversion_char()) &&
          ConvertFloatImpl(v, conv, sink);
 }
@@ -349,6 +376,15 @@ inline bool ConvertStringArg(string_view v, const FormatConversionSpecImpl conv,
 
 }  // namespace
 
+bool ConvertBoolArg(bool v, FormatSinkImpl *sink) {
+  if (v) {
+    sink->Append("true");
+  } else {
+    sink->Append("false");
+  }
+  return true;
+}
+
 // ==================== Strings ====================
 StringConvertResult FormatConvertImpl(const std::string &v,
                                       const FormatConversionSpecImpl conv,
@@ -375,7 +411,7 @@ FormatConvertImpl(const char *v, const FormatConversionSpecImpl conv,
     len = std::strlen(v);
   } else {
     // If precision is set, we look for the NUL-terminator on the valid range.
-    len = std::find(v, v + conv.precision(), '\0') - v;
+    len = static_cast<size_t>(std::find(v, v + conv.precision(), '\0') - v);
   }
   return {ConvertStringArg(string_view(v, len), conv, sink)};
 }
@@ -410,19 +446,18 @@ FloatingConvertResult FormatConvertImpl(long double v,
 }
 
 // ==================== Chars ====================
-IntegralConvertResult FormatConvertImpl(char v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
+CharConvertResult FormatConvertImpl(char v, const FormatConversionSpecImpl conv,
+                                    FormatSinkImpl *sink) {
   return {ConvertIntArg(v, conv, sink)};
 }
-IntegralConvertResult FormatConvertImpl(signed char v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
+CharConvertResult FormatConvertImpl(signed char v,
+                                    const FormatConversionSpecImpl conv,
+                                    FormatSinkImpl *sink) {
   return {ConvertIntArg(v, conv, sink)};
 }
-IntegralConvertResult FormatConvertImpl(unsigned char v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
+CharConvertResult FormatConvertImpl(unsigned char v,
+                                    const FormatConversionSpecImpl conv,
+                                    FormatSinkImpl *sink) {
   return {ConvertIntArg(v, conv, sink)};
 }
 
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/arg.h b/third_party/abseil-cpp/absl/strings/internal/str_format/arg.h
index 3c91be701f..b3e4ff1595 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/arg.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/arg.h
@@ -45,6 +45,11 @@ class FormatConversionSpec;
 
 namespace str_format_internal {
 
+template <FormatConversionCharSet C>
+struct ArgConvertResult {
+  bool value;
+};
+
 template <typename T, typename = void>
 struct HasUserDefinedConvert : std::false_type {};
 
@@ -55,7 +60,12 @@ struct HasUserDefinedConvert<T, void_t<decltype(AbslFormatConvert(
                                     std::declval<FormatSink*>()))>>
     : std::true_type {};
 
-void AbslFormatConvert();  // Stops the lexical name lookup
+// These declarations prevent ADL lookup from continuing in absl namespaces,
+// we are deliberately using these as ADL hooks and want them to consider
+// non-absl namespaces only.
+void AbslFormatConvert();
+void AbslStringify();
+
 template <typename T>
 auto FormatConvertImpl(const T& v, FormatConversionSpecImpl conv,
                        FormatSinkImpl* sink)
@@ -72,6 +82,19 @@ auto FormatConvertImpl(const T& v, FormatConversionSpecImpl conv,
 }
 
 template <typename T>
+auto FormatConvertImpl(const T& v, FormatConversionSpecImpl,
+                       FormatSinkImpl* sink)
+    -> std::enable_if_t<std::is_void<decltype(AbslStringify(
+                            std::declval<FormatSink&>(), v))>::value,
+                        ArgConvertResult<FormatConversionCharSetInternal::v>> {
+  using FormatSinkT =
+      absl::enable_if_t<sizeof(const T& (*)()) != 0, FormatSink>;
+  auto fs = sink->Wrap<FormatSinkT>();
+  AbslStringify(fs, v);
+  return {true};
+}
+
+template <typename T>
 class StreamedWrapper;
 
 // If 'v' can be converted (in the printf sense) according to 'conv',
@@ -96,11 +119,6 @@ struct VoidPtr {
 };
 
 template <FormatConversionCharSet C>
-struct ArgConvertResult {
-  bool value;
-};
-
-template <FormatConversionCharSet C>
 constexpr FormatConversionCharSet ExtractCharSet(FormatConvertResult<C>) {
   return C;
 }
@@ -110,8 +128,8 @@ constexpr FormatConversionCharSet ExtractCharSet(ArgConvertResult<C>) {
   return C;
 }
 
-using StringConvertResult =
-    ArgConvertResult<FormatConversionCharSetInternal::s>;
+using StringConvertResult = ArgConvertResult<FormatConversionCharSetUnion(
+    FormatConversionCharSetInternal::s, FormatConversionCharSetInternal::v)>;
 ArgConvertResult<FormatConversionCharSetInternal::p> FormatConvertImpl(
     VoidPtr v, FormatConversionSpecImpl conv, FormatSinkImpl* sink);
 
@@ -144,7 +162,7 @@ StringConvertResult FormatConvertImpl(const AbslCord& value,
   size_t space_remaining = 0;
 
   int width = conv.width();
-  if (width >= 0) space_remaining = width;
+  if (width >= 0) space_remaining = static_cast<size_t>(width);
 
   size_t to_write = value.size();
 
@@ -176,9 +194,17 @@ StringConvertResult FormatConvertImpl(const AbslCord& value,
 using IntegralConvertResult = ArgConvertResult<FormatConversionCharSetUnion(
     FormatConversionCharSetInternal::c,
     FormatConversionCharSetInternal::kNumeric,
+    FormatConversionCharSetInternal::kStar,
+    FormatConversionCharSetInternal::v)>;
+using FloatingConvertResult = ArgConvertResult<FormatConversionCharSetUnion(
+    FormatConversionCharSetInternal::kFloating,
+    FormatConversionCharSetInternal::v)>;
+using CharConvertResult = ArgConvertResult<FormatConversionCharSetUnion(
+    FormatConversionCharSetInternal::c,
+    FormatConversionCharSetInternal::kNumeric,
     FormatConversionCharSetInternal::kStar)>;
-using FloatingConvertResult =
-    ArgConvertResult<FormatConversionCharSetInternal::kFloating>;
+
+bool ConvertBoolArg(bool v, FormatSinkImpl* sink);
 
 // Floats.
 FloatingConvertResult FormatConvertImpl(float v, FormatConversionSpecImpl conv,
@@ -190,14 +216,14 @@ FloatingConvertResult FormatConvertImpl(long double v,
                                         FormatSinkImpl* sink);
 
 // Chars.
-IntegralConvertResult FormatConvertImpl(char v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(signed char v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(unsigned char v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
+CharConvertResult FormatConvertImpl(char v, FormatConversionSpecImpl conv,
+                                    FormatSinkImpl* sink);
+CharConvertResult FormatConvertImpl(signed char v,
+                                    FormatConversionSpecImpl conv,
+                                    FormatSinkImpl* sink);
+CharConvertResult FormatConvertImpl(unsigned char v,
+                                    FormatConversionSpecImpl conv,
+                                    FormatSinkImpl* sink);
 
 // Ints.
 IntegralConvertResult FormatConvertImpl(short v,  // NOLINT
@@ -228,9 +254,16 @@ IntegralConvertResult FormatConvertImpl(int128 v, FormatConversionSpecImpl conv,
 IntegralConvertResult FormatConvertImpl(uint128 v,
                                         FormatConversionSpecImpl conv,
                                         FormatSinkImpl* sink);
+
+// This function needs to be a template due to ambiguity regarding type
+// conversions.
 template <typename T, enable_if_t<std::is_same<T, bool>::value, int> = 0>
 IntegralConvertResult FormatConvertImpl(T v, FormatConversionSpecImpl conv,
                                         FormatSinkImpl* sink) {
+  if (conv.conversion_char() == FormatConversionCharInternal::v) {
+    return {ConvertBoolArg(v, sink)};
+  }
+
   return FormatConvertImpl(static_cast<int>(v), conv, sink);
 }
 
@@ -301,11 +334,11 @@ struct FormatArgImplFriend {
 
 template <typename Arg>
 constexpr FormatConversionCharSet ArgumentToConv() {
-  return absl::str_format_internal::ExtractCharSet(
-      decltype(str_format_internal::FormatConvertImpl(
-          std::declval<const Arg&>(),
-          std::declval<const FormatConversionSpecImpl&>(),
-          std::declval<FormatSinkImpl*>())){});
+  using ConvResult = decltype(str_format_internal::FormatConvertImpl(
+      std::declval<const Arg&>(),
+      std::declval<const FormatConversionSpecImpl&>(),
+      std::declval<FormatSinkImpl*>()));
+  return absl::str_format_internal::ExtractCharSet(ConvResult{});
 }
 
 // A type-erased handle to a format argument.
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/bind.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/bind.cc
index c988ba8fd2..77a4222337 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/bind.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/bind.cc
@@ -32,7 +32,8 @@ inline bool BindFromPosition(int position, int* value,
     return false;
   }
   // -1 because positions are 1-based
-  return FormatArgImplFriend::ToInt(pack[position - 1], value);
+  return FormatArgImplFriend::ToInt(pack[static_cast<size_t>(position) - 1],
+                                    value);
 }
 
 class ArgContext {
@@ -56,7 +57,7 @@ inline bool ArgContext::Bind(const UnboundConversion* unbound,
   const FormatArgImpl* arg = nullptr;
   int arg_position = unbound->arg_position;
   if (static_cast<size_t>(arg_position - 1) >= pack_.size()) return false;
-  arg = &pack_[arg_position - 1];  // 1-based
+  arg = &pack_[static_cast<size_t>(arg_position - 1)];  // 1-based
 
   if (unbound->flags != Flags::kBasic) {
     int width = unbound->width.value();
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/bind.h b/third_party/abseil-cpp/absl/strings/internal/str_format/bind.h
index b26cff6648..b73c50287c 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/bind.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/bind.h
@@ -25,6 +25,7 @@
 #include "absl/strings/internal/str_format/checker.h"
 #include "absl/strings/internal/str_format/parser.h"
 #include "absl/types/span.h"
+#include "absl/utility/utility.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -87,6 +88,36 @@ class FormatSpecTemplate
     : public MakeDependent<UntypedFormatSpec, Args...>::type {
   using Base = typename MakeDependent<UntypedFormatSpec, Args...>::type;
 
+  template <bool res>
+  struct ErrorMaker {
+    constexpr bool operator()(int) const { return res; }
+  };
+
+  template <int i, int j>
+  static constexpr bool CheckArity(ErrorMaker<true> SpecifierCount = {},
+                                   ErrorMaker<i == j> ParametersPassed = {}) {
+    static_assert(SpecifierCount(i) == ParametersPassed(j),
+                  "Number of arguments passed must match the number of "
+                  "conversion specifiers.");
+    return true;
+  }
+
+  template <FormatConversionCharSet specified, FormatConversionCharSet passed,
+            int arg>
+  static constexpr bool CheckMatch(
+      ErrorMaker<Contains(specified, passed)> MismatchedArgumentNumber = {}) {
+    static_assert(MismatchedArgumentNumber(arg),
+                  "Passed argument must match specified format.");
+    return true;
+  }
+
+  template <FormatConversionCharSet... C, size_t... I>
+  static bool CheckMatches(absl::index_sequence<I...>) {
+    bool res[] = {true, CheckMatch<Args, C, I + 1>()...};
+    (void)res;
+    return true;
+  }
+
  public:
 #ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
@@ -112,7 +143,8 @@ class FormatSpecTemplate
   template <typename T = void>
   FormatSpecTemplate(string_view s)  // NOLINT
       __attribute__((enable_if(str_format_internal::EnsureConstexpr(s),
-                               "constexpr trap"))) {
+                               "constexpr trap")))
+      : Base("to avoid noise in the compiler error") {
     static_assert(sizeof(T*) == 0,
                   "Format specified does not match the arguments passed.");
   }
@@ -133,13 +165,12 @@ class FormatSpecTemplate
 
 #endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
-  template <
-      FormatConversionCharSet... C,
-      typename = typename std::enable_if<sizeof...(C) == sizeof...(Args)>::type,
-      typename = typename std::enable_if<AllOf(Contains(Args,
-                                                        C)...)>::type>
+  template <FormatConversionCharSet... C>
   FormatSpecTemplate(const ExtendedParsedFormat<C...>& pc)  // NOLINT
-      : Base(&pc) {}
+      : Base(&pc) {
+    CheckArity<sizeof...(C), sizeof...(Args)>();
+    CheckMatches<C...>(absl::make_index_sequence<sizeof...(C)>{});
+  }
 };
 
 class Streamable {
@@ -204,9 +235,10 @@ class StreamedWrapper {
 
  private:
   template <typename S>
-  friend ArgConvertResult<FormatConversionCharSetInternal::s> FormatConvertImpl(
-      const StreamedWrapper<S>& v, FormatConversionSpecImpl conv,
-      FormatSinkImpl* out);
+  friend ArgConvertResult<FormatConversionCharSetUnion(
+      FormatConversionCharSetInternal::s, FormatConversionCharSetInternal::v)>
+  FormatConvertImpl(const StreamedWrapper<S>& v, FormatConversionSpecImpl conv,
+                    FormatSinkImpl* out);
   const T& v_;
 };
 
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/checker.h b/third_party/abseil-cpp/absl/strings/internal/str_format/checker.h
index 2a2601eccf..aeb9d48d39 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/checker.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/checker.h
@@ -22,9 +22,14 @@
 // Compile time check support for entry points.
 
 #ifndef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-#if ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__)
+// We disable format checker under vscode intellisense compilation.
+// See https://github.com/microsoft/vscode-cpptools/issues/3683 for
+// more details.
+#if ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__) && \
+    !defined(__INTELLISENSE__)
 #define ABSL_INTERNAL_ENABLE_FORMAT_CHECKER 1
-#endif  // ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__)
+#endif  // ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__) &&
+        // !defined(__INTELLISENSE__)
 #endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
 namespace absl {
@@ -77,9 +82,10 @@ constexpr string_view ConsumeFront(string_view str, size_t len = 1) {
 }
 
 constexpr string_view ConsumeAnyOf(string_view format, const char* chars) {
-  return ContainsChar(chars, GetChar(format, 0))
-             ? ConsumeAnyOf(ConsumeFront(format), chars)
-             : format;
+  while (ContainsChar(chars, GetChar(format, 0))) {
+    format = ConsumeFront(format);
+  }
+  return format;
 }
 
 constexpr bool IsDigit(char c) { return c >= '0' && c <= '9'; }
@@ -93,16 +99,22 @@ struct Integer {
   // If the next character is a '$', consume it.
   // Otherwise, make `this` an invalid positional argument.
   constexpr Integer ConsumePositionalDollar() const {
-    return GetChar(format, 0) == '$' ? Integer{ConsumeFront(format), value}
-                                     : Integer{format, 0};
+    if (GetChar(format, 0) == '$') {
+      return Integer{ConsumeFront(format), value};
+    } else {
+      return Integer{format, 0};
+    }
   }
 };
 
-constexpr Integer ParseDigits(string_view format, int value = 0) {
-  return IsDigit(GetChar(format, 0))
-             ? ParseDigits(ConsumeFront(format),
-                           10 * value + GetChar(format, 0) - '0')
-             : Integer{format, value};
+constexpr Integer ParseDigits(string_view format) {
+  int value = 0;
+  while (IsDigit(GetChar(format, 0))) {
+    value = 10 * value + GetChar(format, 0) - '0';
+    format = ConsumeFront(format);
+  }
+
+  return Integer{format, value};
 }
 
 // Parse digits for a positional argument.
@@ -158,30 +170,36 @@ class ConvParser {
   // If it is '*', we verify that it matches `args_`. `error_` is set if it
   // doesn't match.
   constexpr ConvParser ParseWidth() const {
-    return IsDigit(GetChar(format_, 0))
-               ? SetFormat(ParseDigits(format_).format)
-               : GetChar(format_, 0) == '*'
-                     ? is_positional_
-                           ? VerifyPositional(
-                                 ParsePositional(ConsumeFront(format_)), '*')
-                           : SetFormat(ConsumeFront(format_))
-                                 .ConsumeNextArg('*')
-                     : *this;
+    char first_char = GetChar(format_, 0);
+
+    if (IsDigit(first_char)) {
+      return SetFormat(ParseDigits(format_).format);
+    } else if (first_char == '*') {
+      if (is_positional_) {
+        return VerifyPositional(ParsePositional(ConsumeFront(format_)), '*');
+      } else {
+        return SetFormat(ConsumeFront(format_)).ConsumeNextArg('*');
+      }
+    } else {
+      return *this;
+    }
   }
 
   // Consume the precision.
   // If it is '*', we verify that it matches `args_`. `error_` is set if it
   // doesn't match.
   constexpr ConvParser ParsePrecision() const {
-    return GetChar(format_, 0) != '.'
-               ? *this
-               : GetChar(format_, 1) == '*'
-                     ? is_positional_
-                           ? VerifyPositional(
-                                 ParsePositional(ConsumeFront(format_, 2)), '*')
-                           : SetFormat(ConsumeFront(format_, 2))
-                                 .ConsumeNextArg('*')
-                     : SetFormat(ParseDigits(ConsumeFront(format_)).format);
+    if (GetChar(format_, 0) != '.') {
+      return *this;
+    } else if (GetChar(format_, 1) == '*') {
+      if (is_positional_) {
+        return VerifyPositional(ParsePositional(ConsumeFront(format_, 2)), '*');
+      } else {
+        return SetFormat(ConsumeFront(format_, 2)).ConsumeNextArg('*');
+      }
+    } else {
+      return SetFormat(ParseDigits(ConsumeFront(format_)).format);
+    }
   }
 
   // Consume the length characters.
@@ -192,11 +210,18 @@ class ConvParser {
   // Consume the conversion character and verify that it matches `args_`.
   // `error_` is set if it doesn't match.
   constexpr ConvParser ParseConversion() const {
-    return is_positional_
-               ? VerifyPositional({ConsumeFront(format_), arg_position_},
-                                  GetChar(format_, 0))
-               : ConsumeNextArg(GetChar(format_, 0))
-                     .SetFormat(ConsumeFront(format_));
+    char first_char = GetChar(format_, 0);
+
+    if (first_char == 'v' && *(format_.data() - 1) != '%') {
+      return SetError(true);
+    }
+
+    if (is_positional_) {
+      return VerifyPositional({ConsumeFront(format_), arg_position_},
+                              first_char);
+    } else {
+      return ConsumeNextArg(first_char).SetFormat(ConsumeFront(format_));
+    }
   }
 
   constexpr ConvParser(string_view format, ConvList args, bool error,
@@ -219,8 +244,13 @@ class ConvParser {
   // `format()` will be set to the character after the conversion character.
   // `error()` will be set if any of the arguments do not match.
   constexpr ConvParser Run() const {
-    return (is_positional_ ? ParseArgPosition(ParsePositional(format_)) : *this)
-        .ParseFlags()
+    ConvParser parser = *this;
+
+    if (is_positional_) {
+      parser = ParseArgPosition(ParsePositional(format_));
+    }
+
+    return parser.ParseFlags()
         .ParseWidth()
         .ParsePrecision()
         .ParseLength()
@@ -257,29 +287,40 @@ class FormatParser {
   // We use an inner function to increase the recursion limit.
   // The inner function consumes up to `limit` characters on every run.
   // This increases the limit from 512 to ~512*limit.
-  static constexpr string_view ConsumeNonPercentInner(string_view format,
-                                                      int limit = 20) {
-    return FoundPercent(format) || !limit
-               ? format
-               : ConsumeNonPercentInner(
-                     ConsumeFront(format, GetChar(format, 0) == '%' &&
-                                                  GetChar(format, 1) == '%'
-                                              ? 2
-                                              : 1),
-                     limit - 1);
+  static constexpr string_view ConsumeNonPercentInner(string_view format) {
+    int limit = 20;
+    while (!FoundPercent(format) && limit != 0) {
+      size_t len = 0;
+
+      if (GetChar(format, 0) == '%' && GetChar(format, 1) == '%') {
+        len = 2;
+      } else {
+        len = 1;
+      }
+
+      format = ConsumeFront(format, len);
+      --limit;
+    }
+
+    return format;
   }
 
   // Consume characters until the next conversion spec %.
   // It skips %%.
   static constexpr string_view ConsumeNonPercent(string_view format) {
-    return FoundPercent(format)
-               ? format
-               : ConsumeNonPercent(ConsumeNonPercentInner(format));
+    while (!FoundPercent(format)) {
+      format = ConsumeNonPercentInner(format);
+    }
+
+    return format;
   }
 
   static constexpr bool IsPositional(string_view format) {
-    return IsDigit(GetChar(format, 0)) ? IsPositional(ConsumeFront(format))
-                                       : GetChar(format, 0) == '$';
+    while (IsDigit(GetChar(format, 0))) {
+      format = ConsumeFront(format);
+    }
+
+    return GetChar(format, 0) == '$';
   }
 
   constexpr bool RunImpl(bool is_positional) const {
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/checker_test.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/checker_test.cc
index 7c70f47d68..680517f7fc 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/checker_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/checker_test.cc
@@ -39,16 +39,16 @@ std::string ConvToString(FormatConversionCharSet conv) {
 
 TEST(StrFormatChecker, ArgumentToConv) {
   FormatConversionCharSet conv = ArgumentToConv<std::string>();
-  EXPECT_EQ(ConvToString(conv), "s");
+  EXPECT_EQ(ConvToString(conv), "sv");
 
   conv = ArgumentToConv<const char*>();
   EXPECT_EQ(ConvToString(conv), "sp");
 
   conv = ArgumentToConv<double>();
-  EXPECT_EQ(ConvToString(conv), "fFeEgGaA");
+  EXPECT_EQ(ConvToString(conv), "fFeEgGaAv");
 
   conv = ArgumentToConv<int>();
-  EXPECT_EQ(ConvToString(conv), "cdiouxXfFeEgGaA*");
+  EXPECT_EQ(ConvToString(conv), "cdiouxXfFeEgGaAv*");
 
   conv = ArgumentToConv<std::string*>();
   EXPECT_EQ(ConvToString(conv), "p");
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/convert_test.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/convert_test.cc
index 91e0360901..300612b7ba 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/convert_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/convert_test.cc
@@ -24,6 +24,7 @@
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
+#include "absl/base/attributes.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/strings/internal/str_format/bind.h"
 #include "absl/strings/match.h"
@@ -124,6 +125,7 @@ void StrAppendV(std::string *dst, const char *format, va_list ap) {
   delete[] buf;
 }
 
+void StrAppend(std::string *, const char *, ...) ABSL_PRINTF_ATTRIBUTE(2, 3);
 void StrAppend(std::string *out, const char *format, ...) {
   va_list ap;
   va_start(ap, format);
@@ -131,6 +133,7 @@ void StrAppend(std::string *out, const char *format, ...) {
   va_end(ap);
 }
 
+std::string StrPrint(const char *, ...) ABSL_PRINTF_ATTRIBUTE(1, 2);
 std::string StrPrint(const char *format, ...) {
   va_list ap;
   va_start(ap, format);
@@ -455,25 +458,36 @@ TYPED_TEST_P(TypedFormatConvertTest, AllIntsWithFlags) {
 }
 
 TYPED_TEST_P(TypedFormatConvertTest, Char) {
+  // Pass a bunch of values of type TypeParam to both FormatPack and libc's
+  // vsnprintf("%c", ...) (wrapped in StrPrint) to make sure we get the same
+  // value.
   typedef TypeParam T;
   using remove_volatile_t = typename std::remove_volatile<T>::type;
-  static const T kMin = std::numeric_limits<remove_volatile_t>::min();
-  static const T kMax = std::numeric_limits<remove_volatile_t>::max();
-  T kVals[] = {
-    remove_volatile_t(1), remove_volatile_t(2), remove_volatile_t(10),
-    remove_volatile_t(-1), remove_volatile_t(-2), remove_volatile_t(-10),
-    remove_volatile_t(0),
-    kMin + remove_volatile_t(1), kMin,
-    kMax - remove_volatile_t(1), kMax
+  std::vector<remove_volatile_t> vals = {
+      remove_volatile_t(1),  remove_volatile_t(2),  remove_volatile_t(10),   //
+      remove_volatile_t(-1), remove_volatile_t(-2), remove_volatile_t(-10),  //
+      remove_volatile_t(0),
   };
-  for (const T &c : kVals) {
+
+  // We'd like to test values near std::numeric_limits::min() and
+  // std::numeric_limits::max(), too, but vsnprintf("%c", ...) can't handle
+  // anything larger than an int. Add in the most extreme values we can without
+  // exceeding that range.
+  static const T kMin =
+      static_cast<remove_volatile_t>(std::numeric_limits<int>::min());
+  static const T kMax =
+      static_cast<remove_volatile_t>(std::numeric_limits<int>::max());
+  vals.insert(vals.end(), {kMin + 1, kMin, kMax - 1, kMax});
+
+  for (const T c : vals) {
     const FormatArgImpl args[] = {FormatArgImpl(c)};
     UntypedFormatSpecImpl format("%c");
-    EXPECT_EQ(StrPrint("%c", c), FormatPack(format, absl::MakeSpan(args)));
+    EXPECT_EQ(StrPrint("%c", static_cast<int>(c)),
+              FormatPack(format, absl::MakeSpan(args)));
   }
 }
 
-REGISTER_TYPED_TEST_CASE_P(TypedFormatConvertTest, AllIntsWithFlags, Char);
+REGISTER_TYPED_TEST_SUITE_P(TypedFormatConvertTest, AllIntsWithFlags, Char);
 
 typedef ::testing::Types<
     int, unsigned, volatile int,
@@ -482,8 +496,8 @@ typedef ::testing::Types<
     long long, unsigned long long,
     signed char, unsigned char, char>
     AllIntTypes;
-INSTANTIATE_TYPED_TEST_CASE_P(TypedFormatConvertTestWithAllIntTypes,
-                              TypedFormatConvertTest, AllIntTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(TypedFormatConvertTestWithAllIntTypes,
+                               TypedFormatConvertTest, AllIntTypes);
 TEST_F(FormatConvertTest, VectorBool) {
   // Make sure vector<bool>'s values behave as bools.
   std::vector<bool> v = {true, false};
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/extension.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/extension.cc
index 484f6ebfc1..2a0ceb13d7 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/extension.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/extension.cc
@@ -33,6 +33,8 @@ std::string FlagsToString(Flags v) {
   return s;
 }
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+
 #define ABSL_INTERNAL_X_VAL(id) \
   constexpr absl::FormatConversionChar FormatConversionCharInternal::id;
 ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, )
@@ -45,21 +47,19 @@ constexpr absl::FormatConversionChar FormatConversionCharInternal::kNone;
 ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_CHAR_SET_CASE, )
 #undef ABSL_INTERNAL_CHAR_SET_CASE
 
-// NOLINTNEXTLINE(readability-redundant-declaration)
 constexpr FormatConversionCharSet FormatConversionCharSetInternal::kStar;
-// NOLINTNEXTLINE(readability-redundant-declaration)
 constexpr FormatConversionCharSet FormatConversionCharSetInternal::kIntegral;
-// NOLINTNEXTLINE(readability-redundant-declaration)
 constexpr FormatConversionCharSet FormatConversionCharSetInternal::kFloating;
-// NOLINTNEXTLINE(readability-redundant-declaration)
 constexpr FormatConversionCharSet FormatConversionCharSetInternal::kNumeric;
-// NOLINTNEXTLINE(readability-redundant-declaration)
 constexpr FormatConversionCharSet FormatConversionCharSetInternal::kPointer;
 
+#endif  // ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+
 bool FormatSinkImpl::PutPaddedString(string_view value, int width,
                                      int precision, bool left) {
   size_t space_remaining = 0;
-  if (width >= 0) space_remaining = width;
+  if (width >= 0)
+    space_remaining = static_cast<size_t>(width);
   size_t n = value.size();
   if (precision >= 0) n = std::min(n, static_cast<size_t>(precision));
   string_view shown(value.data(), n);
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/extension.h b/third_party/abseil-cpp/absl/strings/internal/str_format/extension.h
index 55cbb56d0a..603bd49d18 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/extension.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/extension.h
@@ -19,6 +19,7 @@
 #include <limits.h>
 
 #include <cstddef>
+#include <cstdint>
 #include <cstring>
 #include <ostream>
 
@@ -70,7 +71,7 @@ class FormatSinkImpl {
   ~FormatSinkImpl() { Flush(); }
 
   void Flush() {
-    raw_.Write(string_view(buf_, pos_ - buf_));
+    raw_.Write(string_view(buf_, static_cast<size_t>(pos_ - buf_)));
     pos_ = buf_;
   }
 
@@ -120,7 +121,9 @@ class FormatSinkImpl {
   }
 
  private:
-  size_t Avail() const { return buf_ + sizeof(buf_) - pos_; }
+  size_t Avail() const {
+    return static_cast<size_t>(buf_ + sizeof(buf_) - pos_);
+  }
 
   FormatRawSinkImpl raw_;
   size_t size_ = 0;
@@ -166,7 +169,7 @@ inline std::ostream& operator<<(std::ostream& os, Flags v) {
   X_VAL(f) X_SEP X_VAL(F) X_SEP X_VAL(e) X_SEP X_VAL(E) X_SEP \
   X_VAL(g) X_SEP X_VAL(G) X_SEP X_VAL(a) X_SEP X_VAL(A) X_SEP \
   /* misc */ \
-  X_VAL(n) X_SEP X_VAL(p)
+  X_VAL(n) X_SEP X_VAL(p) X_SEP X_VAL(v)
 // clang-format on
 
 // This type should not be referenced, it exists only to provide labels
@@ -188,7 +191,7 @@ struct FormatConversionCharInternal {
     c, s,                    // text
     d, i, o, u, x, X,        // int
     f, F, e, E, g, G, a, A,  // float
-    n, p,                    // misc
+    n, p, v,                    // misc
     kNone
   };
   // clang-format on
@@ -289,6 +292,8 @@ class FormatConversionSpecImpl {
     return conv_;
   }
 
+  void set_conversion_char(FormatConversionChar c) { conv_ = c; }
+
   // Returns the specified width. If width is unspecfied, it returns a negative
   // value.
   int width() const { return width_; }
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/extension_test.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/extension_test.cc
index 1c93fdb1c7..694c126406 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/extension_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/extension_test.cc
@@ -19,6 +19,7 @@
 #include <random>
 #include <string>
 
+#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/strings/str_format.h"
 #include "absl/strings/string_view.h"
@@ -95,4 +96,14 @@ TEST(FormatExtensionTest, VerifyEnumEquality) {
 #undef X_VAL
 }
 
+TEST(FormatExtensionTest, SetConversionChar) {
+  absl::str_format_internal::FormatConversionSpecImpl spec;
+  EXPECT_EQ(spec.conversion_char(),
+            absl::str_format_internal::FormatConversionCharInternal::kNone);
+  spec.set_conversion_char(
+      absl::str_format_internal::FormatConversionCharInternal::d);
+  EXPECT_EQ(spec.conversion_char(),
+            absl::str_format_internal::FormatConversionCharInternal::d);
+}
+
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/float_conversion.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/float_conversion.cc
index b1c4068475..8e497852bb 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/float_conversion.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/float_conversion.cc
@@ -92,27 +92,30 @@ class StackArray {
 
 // Calculates `10 * (*v) + carry` and stores the result in `*v` and returns
 // the carry.
+// Requires: `0 <= carry <= 9`
 template <typename Int>
-inline Int MultiplyBy10WithCarry(Int *v, Int carry) {
+inline char MultiplyBy10WithCarry(Int* v, char carry) {
   using BiggerInt = absl::conditional_t<sizeof(Int) == 4, uint64_t, uint128>;
-  BiggerInt tmp = 10 * static_cast<BiggerInt>(*v) + carry;
+  BiggerInt tmp =
+      10 * static_cast<BiggerInt>(*v) + static_cast<BiggerInt>(carry);
   *v = static_cast<Int>(tmp);
-  return static_cast<Int>(tmp >> (sizeof(Int) * 8));
+  return static_cast<char>(tmp >> (sizeof(Int) * 8));
 }
 
 // Calculates `(2^64 * carry + *v) / 10`.
 // Stores the quotient in `*v` and returns the remainder.
 // Requires: `0 <= carry <= 9`
-inline uint64_t DivideBy10WithCarry(uint64_t *v, uint64_t carry) {
+inline char DivideBy10WithCarry(uint64_t* v, char carry) {
   constexpr uint64_t divisor = 10;
   // 2^64 / divisor = chunk_quotient + chunk_remainder / divisor
   constexpr uint64_t chunk_quotient = (uint64_t{1} << 63) / (divisor / 2);
   constexpr uint64_t chunk_remainder = uint64_t{} - chunk_quotient * divisor;
 
+  const uint64_t carry_u64 = static_cast<uint64_t>(carry);
   const uint64_t mod = *v % divisor;
-  const uint64_t next_carry = chunk_remainder * carry + mod;
-  *v = *v / divisor + carry * chunk_quotient + next_carry / divisor;
-  return next_carry % divisor;
+  const uint64_t next_carry = chunk_remainder * carry_u64 + mod;
+  *v = *v / divisor + carry_u64 * chunk_quotient + next_carry / divisor;
+  return static_cast<char>(next_carry % divisor);
 }
 
 using MaxFloatType =
@@ -125,11 +128,11 @@ using MaxFloatType =
 //
 // Requires `0 <= exp` and `exp <= numeric_limits<MaxFloatType>::max_exponent`.
 class BinaryToDecimal {
-  static constexpr int ChunksNeeded(int exp) {
+  static constexpr size_t ChunksNeeded(int exp) {
     // We will left shift a uint128 by `exp` bits, so we need `128+exp` total
     // bits. Round up to 32.
     // See constructor for details about adding `10%` to the value.
-    return (128 + exp + 31) / 32 * 11 / 10;
+    return static_cast<size_t>((128 + exp + 31) / 32 * 11 / 10);
   }
 
  public:
@@ -140,7 +143,7 @@ class BinaryToDecimal {
     assert(exp > 0);
     assert(exp <= std::numeric_limits<MaxFloatType>::max_exponent);
     static_assert(
-        static_cast<int>(StackArray::kMaxCapacity) >=
+        StackArray::kMaxCapacity >=
             ChunksNeeded(std::numeric_limits<MaxFloatType>::max_exponent),
         "");
 
@@ -149,9 +152,9 @@ class BinaryToDecimal {
         [=](absl::Span<uint32_t> input) { f(BinaryToDecimal(input, v, exp)); });
   }
 
-  int TotalDigits() const {
-    return static_cast<int>((decimal_end_ - decimal_start_) * kDigitsPerChunk +
-                            CurrentDigits().size());
+  size_t TotalDigits() const {
+    return (decimal_end_ - decimal_start_) * kDigitsPerChunk +
+           CurrentDigits().size();
   }
 
   // See the current block of digits.
@@ -190,30 +193,31 @@ class BinaryToDecimal {
     // the decimal representation is around 7% less efficient in space than the
     // binary one. We allocate an extra 10% memory to account for this. See
     // ChunksNeeded for this calculation.
-    int chunk_index = exp / 32;
+    size_t after_chunk_index = static_cast<size_t>(exp / 32 + 1);
     decimal_start_ = decimal_end_ = ChunksNeeded(exp);
     const int offset = exp % 32;
     // Left shift v by exp bits.
-    data_[chunk_index] = static_cast<uint32_t>(v << offset);
+    data_[after_chunk_index - 1] = static_cast<uint32_t>(v << offset);
     for (v >>= (32 - offset); v; v >>= 32)
-      data_[++chunk_index] = static_cast<uint32_t>(v);
+      data_[++after_chunk_index - 1] = static_cast<uint32_t>(v);
 
-    while (chunk_index >= 0) {
+    while (after_chunk_index > 0) {
       // While we have more than one chunk available, go in steps of 1e9.
-      // `data_[chunk_index]` holds the highest non-zero binary chunk, so keep
-      // the variable updated.
+      // `data_[after_chunk_index - 1]` holds the highest non-zero binary chunk,
+      // so keep the variable updated.
       uint32_t carry = 0;
-      for (int i = chunk_index; i >= 0; --i) {
-        uint64_t tmp = uint64_t{data_[i]} + (uint64_t{carry} << 32);
-        data_[i] = static_cast<uint32_t>(tmp / uint64_t{1000000000});
+      for (size_t i = after_chunk_index; i > 0; --i) {
+        uint64_t tmp = uint64_t{data_[i - 1]} + (uint64_t{carry} << 32);
+        data_[i - 1] = static_cast<uint32_t>(tmp / uint64_t{1000000000});
         carry = static_cast<uint32_t>(tmp % uint64_t{1000000000});
       }
 
       // If the highest chunk is now empty, remove it from view.
-      if (data_[chunk_index] == 0) --chunk_index;
+      if (data_[after_chunk_index - 1] == 0)
+        --after_chunk_index;
 
       --decimal_start_;
-      assert(decimal_start_ != chunk_index);
+      assert(decimal_start_ != after_chunk_index - 1);
       data_[decimal_start_] = carry;
     }
 
@@ -225,13 +229,13 @@ class BinaryToDecimal {
   }
 
  private:
-  static constexpr int kDigitsPerChunk = 9;
+  static constexpr size_t kDigitsPerChunk = 9;
 
-  int decimal_start_;
-  int decimal_end_;
+  size_t decimal_start_;
+  size_t decimal_end_;
 
   char digits_[kDigitsPerChunk];
-  int size_ = 0;
+  size_t size_ = 0;
 
   absl::Span<uint32_t> data_;
 };
@@ -251,25 +255,26 @@ class FractionalDigitGenerator {
     static_assert(StackArray::kMaxCapacity >=
                       (Limits::digits + 128 - Limits::min_exponent + 31) / 32,
                   "");
-    StackArray::RunWithCapacity((Limits::digits + exp + 31) / 32,
-                                [=](absl::Span<uint32_t> input) {
-                                  f(FractionalDigitGenerator(input, v, exp));
-                                });
+    StackArray::RunWithCapacity(
+        static_cast<size_t>((Limits::digits + exp + 31) / 32),
+        [=](absl::Span<uint32_t> input) {
+          f(FractionalDigitGenerator(input, v, exp));
+        });
   }
 
   // Returns true if there are any more non-zero digits left.
-  bool HasMoreDigits() const { return next_digit_ != 0 || chunk_index_ >= 0; }
+  bool HasMoreDigits() const { return next_digit_ != 0 || after_chunk_index_; }
 
   // Returns true if the remainder digits are greater than 5000...
   bool IsGreaterThanHalf() const {
-    return next_digit_ > 5 || (next_digit_ == 5 && chunk_index_ >= 0);
+    return next_digit_ > 5 || (next_digit_ == 5 && after_chunk_index_);
   }
   // Returns true if the remainder digits are exactly 5000...
-  bool IsExactlyHalf() const { return next_digit_ == 5 && chunk_index_ < 0; }
+  bool IsExactlyHalf() const { return next_digit_ == 5 && !after_chunk_index_; }
 
   struct Digits {
-    int digit_before_nine;
-    int num_nines;
+    char digit_before_nine;
+    size_t num_nines;
   };
 
   // Get the next set of digits.
@@ -288,35 +293,37 @@ class FractionalDigitGenerator {
 
  private:
   // Return the next digit.
-  int GetOneDigit() {
-    if (chunk_index_ < 0) return 0;
+  char GetOneDigit() {
+    if (!after_chunk_index_)
+      return 0;
 
-    uint32_t carry = 0;
-    for (int i = chunk_index_; i >= 0; --i) {
-      carry = MultiplyBy10WithCarry(&data_[i], carry);
+    char carry = 0;
+    for (size_t i = after_chunk_index_; i > 0; --i) {
+      carry = MultiplyBy10WithCarry(&data_[i - 1], carry);
     }
     // If the lowest chunk is now empty, remove it from view.
-    if (data_[chunk_index_] == 0) --chunk_index_;
+    if (data_[after_chunk_index_ - 1] == 0)
+      --after_chunk_index_;
     return carry;
   }
 
   FractionalDigitGenerator(absl::Span<uint32_t> data, uint128 v, int exp)
-      : chunk_index_(exp / 32), data_(data) {
+      : after_chunk_index_(static_cast<size_t>(exp / 32 + 1)), data_(data) {
     const int offset = exp % 32;
     // Right shift `v` by `exp` bits.
-    data_[chunk_index_] = static_cast<uint32_t>(v << (32 - offset));
+    data_[after_chunk_index_ - 1] = static_cast<uint32_t>(v << (32 - offset));
     v >>= offset;
     // Make sure we don't overflow the data. We already calculated that
     // non-zero bits fit, so we might not have space for leading zero bits.
-    for (int pos = chunk_index_; v; v >>= 32)
+    for (size_t pos = after_chunk_index_ - 1; v; v >>= 32)
       data_[--pos] = static_cast<uint32_t>(v);
 
     // Fill next_digit_, as GetDigits expects it to be populated always.
     next_digit_ = GetOneDigit();
   }
 
-  int next_digit_;
-  int chunk_index_;
+  char next_digit_;
+  size_t after_chunk_index_;
   absl::Span<uint32_t> data_;
 };
 
@@ -362,7 +369,7 @@ char *PrintIntegralDigitsFromRightFast(uint128 v, char *p) {
   auto low = static_cast<uint64_t>(v);
 
   while (high != 0) {
-    uint64_t carry = DivideBy10WithCarry(&high, 0);
+    char carry = DivideBy10WithCarry(&high, 0);
     carry = DivideBy10WithCarry(&low, carry);
     *--p = carry + '0';
   }
@@ -373,13 +380,15 @@ char *PrintIntegralDigitsFromRightFast(uint128 v, char *p) {
 // shifting.
 // Performs rounding if necessary to fit within `precision`.
 // Returns the pointer to one after the last character written.
-char *PrintFractionalDigitsFast(uint64_t v, char *start, int exp,
-                                int precision) {
+char* PrintFractionalDigitsFast(uint64_t v,
+                                char* start,
+                                int exp,
+                                size_t precision) {
   char *p = start;
   v <<= (64 - exp);
   while (precision > 0) {
     if (!v) return p;
-    *p++ = MultiplyBy10WithCarry(&v, uint64_t{0}) + '0';
+    *p++ = MultiplyBy10WithCarry(&v, 0) + '0';
     --precision;
   }
 
@@ -393,8 +402,6 @@ char *PrintFractionalDigitsFast(uint64_t v, char *start, int exp,
     RoundToEven(p - 1);
   }
 
-  assert(precision == 0);
-  // Precision can only be zero here.
   return p;
 }
 
@@ -402,8 +409,10 @@ char *PrintFractionalDigitsFast(uint64_t v, char *start, int exp,
 // after shifting.
 // Performs rounding if necessary to fit within `precision`.
 // Returns the pointer to one after the last character written.
-char *PrintFractionalDigitsFast(uint128 v, char *start, int exp,
-                                int precision) {
+char* PrintFractionalDigitsFast(uint128 v,
+                                char* start,
+                                int exp,
+                                size_t precision) {
   char *p = start;
   v <<= (128 - exp);
   auto high = static_cast<uint64_t>(v >> 64);
@@ -412,7 +421,7 @@ char *PrintFractionalDigitsFast(uint128 v, char *start, int exp,
   // While we have digits to print and `low` is not empty, do the long
   // multiplication.
   while (precision > 0 && low != 0) {
-    uint64_t carry = MultiplyBy10WithCarry(&low, uint64_t{0});
+    char carry = MultiplyBy10WithCarry(&low, 0);
     carry = MultiplyBy10WithCarry(&high, carry);
 
     *p++ = carry + '0';
@@ -424,7 +433,7 @@ char *PrintFractionalDigitsFast(uint128 v, char *start, int exp,
   // above.
   while (precision > 0) {
     if (!high) return p;
-    *p++ = MultiplyBy10WithCarry(&high, uint64_t{0}) + '0';
+    *p++ = MultiplyBy10WithCarry(&high, 0) + '0';
     --precision;
   }
 
@@ -438,14 +447,12 @@ char *PrintFractionalDigitsFast(uint128 v, char *start, int exp,
     RoundToEven(p - 1);
   }
 
-  assert(precision == 0);
-  // Precision can only be zero here.
   return p;
 }
 
 struct FormatState {
   char sign_char;
-  int precision;
+  size_t precision;
   const FormatConversionSpecImpl &conv;
   FormatSinkImpl *sink;
 
@@ -455,9 +462,9 @@ struct FormatState {
 };
 
 struct Padding {
-  int left_spaces;
-  int zeros;
-  int right_spaces;
+  size_t left_spaces;
+  size_t zeros;
+  size_t right_spaces;
 };
 
 Padding ExtraWidthToPadding(size_t total_size, const FormatState &state) {
@@ -465,7 +472,7 @@ Padding ExtraWidthToPadding(size_t total_size, const FormatState &state) {
       static_cast<size_t>(state.conv.width()) <= total_size) {
     return {0, 0, 0};
   }
-  int missing_chars = state.conv.width() - total_size;
+  size_t missing_chars = static_cast<size_t>(state.conv.width()) - total_size;
   if (state.conv.has_left_flag()) {
     return {0, 0, missing_chars};
   } else if (state.conv.has_zero_flag()) {
@@ -475,8 +482,10 @@ Padding ExtraWidthToPadding(size_t total_size, const FormatState &state) {
   }
 }
 
-void FinalPrint(const FormatState &state, absl::string_view data,
-                int padding_offset, int trailing_zeros,
+void FinalPrint(const FormatState& state,
+                absl::string_view data,
+                size_t padding_offset,
+                size_t trailing_zeros,
                 absl::string_view data_postfix) {
   if (state.conv.width() < 0) {
     // No width specified. Fast-path.
@@ -487,10 +496,10 @@ void FinalPrint(const FormatState &state, absl::string_view data,
     return;
   }
 
-  auto padding = ExtraWidthToPadding((state.sign_char != '\0' ? 1 : 0) +
-                                         data.size() + data_postfix.size() +
-                                         static_cast<size_t>(trailing_zeros),
-                                     state);
+  auto padding =
+      ExtraWidthToPadding((state.sign_char != '\0' ? 1 : 0) + data.size() +
+                              data_postfix.size() + trailing_zeros,
+                          state);
 
   state.sink->Append(padding.left_spaces, ' ');
   if (state.sign_char != '\0') state.sink->Append(1, state.sign_char);
@@ -547,15 +556,16 @@ void FormatFFast(Int v, int exp, const FormatState &state) {
     if (integral_digits_start[-1] != '0') --integral_digits_start;
   }
 
-  size_t size = fractional_digits_end - integral_digits_start;
+  size_t size =
+      static_cast<size_t>(fractional_digits_end - integral_digits_start);
 
   // In `alt` mode (flag #) we keep the `.` even if there are no fractional
   // digits. In non-alt mode, we strip it.
   if (!state.ShouldPrintDot()) --size;
   FinalPrint(state, absl::string_view(integral_digits_start, size),
              /*padding_offset=*/0,
-             static_cast<int>(state.precision - (fractional_digits_end -
-                                                 fractional_digits_start)),
+             state.precision - static_cast<size_t>(fractional_digits_end -
+                                                   fractional_digits_start),
              /*data_postfix=*/"");
 }
 
@@ -567,21 +577,22 @@ void FormatFFast(Int v, int exp, const FormatState &state) {
 void FormatFPositiveExpSlow(uint128 v, int exp, const FormatState &state) {
   BinaryToDecimal::RunConversion(v, exp, [&](BinaryToDecimal btd) {
     const size_t total_digits =
-        btd.TotalDigits() +
-        (state.ShouldPrintDot() ? static_cast<size_t>(state.precision) + 1 : 0);
+        btd.TotalDigits() + (state.ShouldPrintDot() ? state.precision + 1 : 0);
 
     const auto padding = ExtraWidthToPadding(
         total_digits + (state.sign_char != '\0' ? 1 : 0), state);
 
     state.sink->Append(padding.left_spaces, ' ');
-    if (state.sign_char != '\0') state.sink->Append(1, state.sign_char);
+    if (state.sign_char != '\0')
+      state.sink->Append(1, state.sign_char);
     state.sink->Append(padding.zeros, '0');
 
     do {
       state.sink->Append(btd.CurrentDigits());
     } while (btd.AdvanceDigits());
 
-    if (state.ShouldPrintDot()) state.sink->Append(1, '.');
+    if (state.ShouldPrintDot())
+      state.sink->Append(1, '.');
     state.sink->Append(state.precision, '0');
     state.sink->Append(padding.right_spaces, ' ');
   });
@@ -594,8 +605,7 @@ void FormatFPositiveExpSlow(uint128 v, int exp, const FormatState &state) {
 // digits.
 void FormatFNegativeExpSlow(uint128 v, int exp, const FormatState &state) {
   const size_t total_digits =
-      /* 0 */ 1 +
-      (state.ShouldPrintDot() ? static_cast<size_t>(state.precision) + 1 : 0);
+      /* 0 */ 1 + (state.ShouldPrintDot() ? state.precision + 1 : 0);
   auto padding =
       ExtraWidthToPadding(total_digits + (state.sign_char ? 1 : 0), state);
   padding.zeros += 1;
@@ -606,7 +616,7 @@ void FormatFNegativeExpSlow(uint128 v, int exp, const FormatState &state) {
   if (state.ShouldPrintDot()) state.sink->Append(1, '.');
 
   // Print digits
-  int digits_to_go = state.precision;
+  size_t digits_to_go = state.precision;
 
   FractionalDigitGenerator::RunConversion(
       v, exp, [&](FractionalDigitGenerator digit_gen) {
@@ -666,7 +676,8 @@ void FormatFNegativeExpSlow(uint128 v, int exp, const FormatState &state) {
 template <typename Int>
 void FormatF(Int mantissa, int exp, const FormatState &state) {
   if (exp >= 0) {
-    const int total_bits = sizeof(Int) * 8 - LeadingZeros(mantissa) + exp;
+    const int total_bits =
+        static_cast<int>(sizeof(Int) * 8) - LeadingZeros(mantissa) + exp;
 
     // Fallback to the slow stack-based approach if we can't do it in a 64 or
     // 128 bit state.
@@ -686,9 +697,9 @@ void FormatF(Int mantissa, int exp, const FormatState &state) {
 // Grab the group of four bits (nibble) from `n`. E.g., nibble 1 corresponds to
 // bits 4-7.
 template <typename Int>
-uint8_t GetNibble(Int n, int nibble_index) {
+uint8_t GetNibble(Int n, size_t nibble_index) {
   constexpr Int mask_low_nibble = Int{0xf};
-  int shift = nibble_index * 4;
+  int shift = static_cast<int>(nibble_index * 4);
   n &= mask_low_nibble << shift;
   return static_cast<uint8_t>((n >> shift) & 0xf);
 }
@@ -696,9 +707,9 @@ uint8_t GetNibble(Int n, int nibble_index) {
 // Add one to the given nibble, applying carry to higher nibbles. Returns true
 // if overflow, false otherwise.
 template <typename Int>
-bool IncrementNibble(int nibble_index, Int *n) {
-  constexpr int kShift = sizeof(Int) * 8 - 1;
-  constexpr int kNumNibbles = sizeof(Int) * 8 / 4;
+bool IncrementNibble(size_t nibble_index, Int* n) {
+  constexpr size_t kShift = sizeof(Int) * 8 - 1;
+  constexpr size_t kNumNibbles = sizeof(Int) * 8 / 4;
   Int before = *n >> kShift;
   // Here we essentially want to take the number 1 and move it into the requsted
   // nibble, then add it to *n to effectively increment the nibble. However,
@@ -706,28 +717,32 @@ bool IncrementNibble(int nibble_index, Int *n) {
   // i.e., if the nibble_index is out of range. So therefore we check for this
   // and if we are out of range we just add 0 which leaves *n unchanged, which
   // seems like the reasonable thing to do in that case.
-  *n += ((nibble_index >= kNumNibbles) ? 0 : (Int{1} << (nibble_index * 4)));
+  *n += ((nibble_index >= kNumNibbles)
+             ? 0
+             : (Int{1} << static_cast<int>(nibble_index * 4)));
   Int after = *n >> kShift;
   return (before && !after) || (nibble_index >= kNumNibbles);
 }
 
 // Return a mask with 1's in the given nibble and all lower nibbles.
 template <typename Int>
-Int MaskUpToNibbleInclusive(int nibble_index) {
-  constexpr int kNumNibbles = sizeof(Int) * 8 / 4;
+Int MaskUpToNibbleInclusive(size_t nibble_index) {
+  constexpr size_t kNumNibbles = sizeof(Int) * 8 / 4;
   static const Int ones = ~Int{0};
-  return ones >> std::max(0, 4 * (kNumNibbles - nibble_index - 1));
+  ++nibble_index;
+  return ones >> static_cast<int>(
+                     4 * (std::max(kNumNibbles, nibble_index) - nibble_index));
 }
 
 // Return a mask with 1's below the given nibble.
 template <typename Int>
-Int MaskUpToNibbleExclusive(int nibble_index) {
-  return nibble_index <= 0 ? 0 : MaskUpToNibbleInclusive<Int>(nibble_index - 1);
+Int MaskUpToNibbleExclusive(size_t nibble_index) {
+  return nibble_index == 0 ? 0 : MaskUpToNibbleInclusive<Int>(nibble_index - 1);
 }
 
 template <typename Int>
-Int MoveToNibble(uint8_t nibble, int nibble_index) {
-  return Int{nibble} << (4 * nibble_index);
+Int MoveToNibble(uint8_t nibble, size_t nibble_index) {
+  return Int{nibble} << static_cast<int>(4 * nibble_index);
 }
 
 // Given mantissa size, find optimal # of mantissa bits to put in initial digit.
@@ -744,10 +759,10 @@ Int MoveToNibble(uint8_t nibble, int nibble_index) {
 // a multiple of four. Once again, the goal is to have all fractional digits
 // represent real precision.
 template <typename Float>
-constexpr int HexFloatLeadingDigitSizeInBits() {
+constexpr size_t HexFloatLeadingDigitSizeInBits() {
   return std::numeric_limits<Float>::digits % 4 > 0
-             ? std::numeric_limits<Float>::digits % 4
-             : 4;
+             ? static_cast<size_t>(std::numeric_limits<Float>::digits % 4)
+             : size_t{4};
 }
 
 // This function captures the rounding behavior of glibc for hex float
@@ -757,16 +772,17 @@ constexpr int HexFloatLeadingDigitSizeInBits() {
 // point that is not followed by 800000..., it disregards the parity and rounds
 // up if > 8 and rounds down if < 8.
 template <typename Int>
-bool HexFloatNeedsRoundUp(Int mantissa, int final_nibble_displayed,
+bool HexFloatNeedsRoundUp(Int mantissa,
+                          size_t final_nibble_displayed,
                           uint8_t leading) {
   // If the last nibble (hex digit) to be displayed is the lowest on in the
   // mantissa then that means that we don't have any further nibbles to inform
   // rounding, so don't round.
-  if (final_nibble_displayed <= 0) {
+  if (final_nibble_displayed == 0) {
     return false;
   }
-  int rounding_nibble_idx = final_nibble_displayed - 1;
-  constexpr int kTotalNibbles = sizeof(Int) * 8 / 4;
+  size_t rounding_nibble_idx = final_nibble_displayed - 1;
+  constexpr size_t kTotalNibbles = sizeof(Int) * 8 / 4;
   assert(final_nibble_displayed <= kTotalNibbles);
   Int mantissa_up_to_rounding_nibble_inclusive =
       mantissa & MaskUpToNibbleInclusive<Int>(rounding_nibble_idx);
@@ -793,7 +809,7 @@ struct HexFloatTypeParams {
   }
 
   int min_exponent;
-  int leading_digit_size_bits;
+  size_t leading_digit_size_bits;
 };
 
 // Hex Float Rounding. First check if we need to round; if so, then we do that
@@ -803,10 +819,12 @@ struct HexFloatTypeParams {
 template <typename Int>
 void FormatARound(bool precision_specified, const FormatState &state,
                   uint8_t *leading, Int *mantissa, int *exp) {
-  constexpr int kTotalNibbles = sizeof(Int) * 8 / 4;
+  constexpr size_t kTotalNibbles = sizeof(Int) * 8 / 4;
   // Index of the last nibble that we could display given precision.
-  int final_nibble_displayed =
-      precision_specified ? std::max(0, (kTotalNibbles - state.precision)) : 0;
+  size_t final_nibble_displayed =
+      precision_specified
+          ? (std::max(kTotalNibbles, state.precision) - state.precision)
+          : 0;
   if (HexFloatNeedsRoundUp(*mantissa, final_nibble_displayed, *leading)) {
     // Need to round up.
     bool overflow = IncrementNibble(final_nibble_displayed, mantissa);
@@ -830,9 +848,9 @@ void FormatARound(bool precision_specified, const FormatState &state,
 template <typename Int>
 void FormatANormalize(const HexFloatTypeParams float_traits, uint8_t *leading,
                       Int *mantissa, int *exp) {
-  constexpr int kIntBits = sizeof(Int) * 8;
+  constexpr size_t kIntBits = sizeof(Int) * 8;
   static const Int kHighIntBit = Int{1} << (kIntBits - 1);
-  const int kLeadDigitBitsCount = float_traits.leading_digit_size_bits;
+  const size_t kLeadDigitBitsCount = float_traits.leading_digit_size_bits;
   // Normalize mantissa so that highest bit set is in MSB position, unless we
   // get interrupted by the exponent threshold.
   while (*mantissa && !(*mantissa & kHighIntBit)) {
@@ -846,18 +864,18 @@ void FormatANormalize(const HexFloatTypeParams float_traits, uint8_t *leading,
   }
   // Extract bits for leading digit then shift them away leaving the
   // fractional part.
-  *leading =
-      static_cast<uint8_t>(*mantissa >> (kIntBits - kLeadDigitBitsCount));
-  *exp -= (*mantissa != 0) ? kLeadDigitBitsCount : *exp;
-  *mantissa <<= kLeadDigitBitsCount;
+  *leading = static_cast<uint8_t>(
+      *mantissa >> static_cast<int>(kIntBits - kLeadDigitBitsCount));
+  *exp -= (*mantissa != 0) ? static_cast<int>(kLeadDigitBitsCount) : *exp;
+  *mantissa <<= static_cast<int>(kLeadDigitBitsCount);
 }
 
 template <typename Int>
 void FormatA(const HexFloatTypeParams float_traits, Int mantissa, int exp,
              bool uppercase, const FormatState &state) {
   // Int properties.
-  constexpr int kIntBits = sizeof(Int) * 8;
-  constexpr int kTotalNibbles = sizeof(Int) * 8 / 4;
+  constexpr size_t kIntBits = sizeof(Int) * 8;
+  constexpr size_t kTotalNibbles = sizeof(Int) * 8 / 4;
   // Did the user specify a precision explicitly?
   const bool precision_specified = state.conv.precision() >= 0;
 
@@ -903,16 +921,19 @@ void FormatA(const HexFloatTypeParams float_traits, Int mantissa, int exp,
   }
 
   // ============ Fractional Digits ============
-  int digits_emitted = 0;
+  size_t digits_emitted = 0;
   while (mantissa > 0) {
     *digits_iter++ = digits[GetNibble(mantissa, kTotalNibbles - 1)];
     mantissa <<= 4;
     ++digits_emitted;
   }
-  int trailing_zeros =
-      precision_specified ? state.precision - digits_emitted : 0;
-  assert(trailing_zeros >= 0);
-  auto digits_result = string_view(digits_buffer, digits_iter - digits_buffer);
+  size_t trailing_zeros = 0;
+  if (precision_specified) {
+    assert(state.precision >= digits_emitted);
+    trailing_zeros = state.precision - digits_emitted;
+  }
+  auto digits_result = string_view(
+      digits_buffer, static_cast<size_t>(digits_iter - digits_buffer));
 
   // =============== Exponent ==================
   constexpr size_t kBufSizeForExpDecRepr =
@@ -925,11 +946,11 @@ void FormatA(const HexFloatTypeParams float_traits, Int mantissa, int exp,
   numbers_internal::FastIntToBuffer(exp < 0 ? -exp : exp, exp_buffer + 2);
 
   // ============ Assemble Result ==============
-  FinalPrint(state,           //
-             digits_result,   // 0xN.NNN...
-             2,               // offset in `data` to start padding if needed.
-             trailing_zeros,  // num remaining mantissa padding zeros
-             exp_buffer);     // exponent
+  FinalPrint(state,
+             digits_result,                        // 0xN.NNN...
+             2,                                    // offset of any padding
+             static_cast<size_t>(trailing_zeros),  // remaining mantissa padding
+             exp_buffer);                          // exponent
 }
 
 char *CopyStringTo(absl::string_view v, char *out) {
@@ -961,10 +982,10 @@ bool FallbackToSnprintf(const Float v, const FormatConversionSpecImpl &conv,
     int n = snprintf(&space[0], space.size(), fmt, w, p, v);
     if (n < 0) return false;
     if (static_cast<size_t>(n) < space.size()) {
-      result = absl::string_view(space.data(), n);
+      result = absl::string_view(space.data(), static_cast<size_t>(n));
       break;
     }
-    space.resize(n + 1);
+    space.resize(static_cast<size_t>(n) + 1);
   }
   sink->Append(result);
   return true;
@@ -972,13 +993,13 @@ bool FallbackToSnprintf(const Float v, const FormatConversionSpecImpl &conv,
 
 // 128-bits in decimal: ceil(128*log(2)/log(10))
 //   or std::numeric_limits<__uint128_t>::digits10
-constexpr int kMaxFixedPrecision = 39;
+constexpr size_t kMaxFixedPrecision = 39;
 
-constexpr int kBufferLength = /*sign*/ 1 +
-                              /*integer*/ kMaxFixedPrecision +
-                              /*point*/ 1 +
-                              /*fraction*/ kMaxFixedPrecision +
-                              /*exponent e+123*/ 5;
+constexpr size_t kBufferLength = /*sign*/ 1 +
+                                 /*integer*/ kMaxFixedPrecision +
+                                 /*point*/ 1 +
+                                 /*fraction*/ kMaxFixedPrecision +
+                                 /*exponent e+123*/ 5;
 
 struct Buffer {
   void push_front(char c) {
@@ -1001,7 +1022,7 @@ struct Buffer {
 
   char last_digit() const { return end[-1] == '.' ? end[-2] : end[-1]; }
 
-  int size() const { return static_cast<int>(end - begin); }
+  size_t size() const { return static_cast<size_t>(end - begin); }
 
   char data[kBufferLength];
   char *begin;
@@ -1030,8 +1051,9 @@ bool ConvertNonNumericFloats(char sign_char, Float v,
     return false;
   }
 
-  return sink->PutPaddedString(string_view(text, ptr - text), conv.width(), -1,
-                               conv.has_left_flag());
+  return sink->PutPaddedString(
+      string_view(text, static_cast<size_t>(ptr - text)), conv.width(), -1,
+      conv.has_left_flag());
 }
 
 // Round up the last digit of the value.
@@ -1068,12 +1090,12 @@ void PrintExponent(int exp, char e, Buffer *out) {
   }
   // Exponent digits.
   if (exp > 99) {
-    out->push_back(exp / 100 + '0');
-    out->push_back(exp / 10 % 10 + '0');
-    out->push_back(exp % 10 + '0');
+    out->push_back(static_cast<char>(exp / 100 + '0'));
+    out->push_back(static_cast<char>(exp / 10 % 10 + '0'));
+    out->push_back(static_cast<char>(exp % 10 + '0'));
   } else {
-    out->push_back(exp / 10 + '0');
-    out->push_back(exp % 10 + '0');
+    out->push_back(static_cast<char>(exp / 10 + '0'));
+    out->push_back(static_cast<char>(exp % 10 + '0'));
   }
 }
 
@@ -1115,8 +1137,8 @@ Decomposed<Float> Decompose(Float v) {
 // In Fixed mode, we add a '.' at the end.
 // In Precision mode, we add a '.' after the first digit.
 template <FormatStyle mode, typename Int>
-int PrintIntegralDigits(Int digits, Buffer *out) {
-  int printed = 0;
+size_t PrintIntegralDigits(Int digits, Buffer* out) {
+  size_t printed = 0;
   if (digits) {
     for (; digits; digits /= 10) out->push_front(digits % 10 + '0');
     printed = out->size();
@@ -1135,10 +1157,10 @@ int PrintIntegralDigits(Int digits, Buffer *out) {
 }
 
 // Back out 'extra_digits' digits and round up if necessary.
-bool RemoveExtraPrecision(int extra_digits, bool has_leftover_value,
-                          Buffer *out, int *exp_out) {
-  if (extra_digits <= 0) return false;
-
+void RemoveExtraPrecision(size_t extra_digits,
+                          bool has_leftover_value,
+                          Buffer* out,
+                          int* exp_out) {
   // Back out the extra digits
   out->end -= extra_digits;
 
@@ -1158,15 +1180,17 @@ bool RemoveExtraPrecision(int extra_digits, bool has_leftover_value,
   if (needs_to_round_up) {
     RoundUp<FormatStyle::Precision>(out, exp_out);
   }
-  return true;
 }
 
 // Print the value into the buffer.
 // This will not include the exponent, which will be returned in 'exp_out' for
 // Precision mode.
 template <typename Int, typename Float, FormatStyle mode>
-bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
-                       int *exp_out) {
+bool FloatToBufferImpl(Int int_mantissa,
+                       int exp,
+                       size_t precision,
+                       Buffer* out,
+                       int* exp_out) {
   assert((CanFitMantissa<Float, Int>()));
 
   const int int_bits = std::numeric_limits<Int>::digits;
@@ -1182,14 +1206,16 @@ bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
       // The value will overflow the Int
       return false;
     }
-    int digits_printed = PrintIntegralDigits<mode>(int_mantissa << exp, out);
-    int digits_to_zero_pad = precision;
+    size_t digits_printed = PrintIntegralDigits<mode>(int_mantissa << exp, out);
+    size_t digits_to_zero_pad = precision;
     if (mode == FormatStyle::Precision) {
-      *exp_out = digits_printed - 1;
-      digits_to_zero_pad -= digits_printed - 1;
-      if (RemoveExtraPrecision(-digits_to_zero_pad, false, out, exp_out)) {
+      *exp_out = static_cast<int>(digits_printed - 1);
+      if (digits_to_zero_pad < digits_printed - 1) {
+        RemoveExtraPrecision(digits_printed - 1 - digits_to_zero_pad, false,
+                             out, exp_out);
         return true;
       }
+      digits_to_zero_pad -= digits_printed - 1;
     }
     for (; digits_to_zero_pad-- > 0;) out->push_back('0');
     return true;
@@ -1203,10 +1229,10 @@ bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
   const Int mask = (Int{1} << exp) - 1;
 
   // Print the integral part first.
-  int digits_printed = PrintIntegralDigits<mode>(int_mantissa >> exp, out);
+  size_t digits_printed = PrintIntegralDigits<mode>(int_mantissa >> exp, out);
   int_mantissa &= mask;
 
-  int fractional_count = precision;
+  size_t fractional_count = precision;
   if (mode == FormatStyle::Precision) {
     if (digits_printed == 0) {
       // Find the first non-zero digit, when in Precision mode.
@@ -1222,20 +1248,21 @@ bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
       int_mantissa &= mask;
     } else {
       // We already have a digit, and a '.'
-      *exp_out = digits_printed - 1;
-      fractional_count -= *exp_out;
-      if (RemoveExtraPrecision(-fractional_count, int_mantissa != 0, out,
-                               exp_out)) {
+      *exp_out = static_cast<int>(digits_printed - 1);
+      if (fractional_count < digits_printed - 1) {
         // If we had enough digits, return right away.
         // The code below will try to round again otherwise.
+        RemoveExtraPrecision(digits_printed - 1 - fractional_count,
+                             int_mantissa != 0, out, exp_out);
         return true;
       }
+      fractional_count -= digits_printed - 1;
     }
   }
 
   auto get_next_digit = [&] {
     int_mantissa *= 10;
-    int digit = static_cast<int>(int_mantissa >> exp);
+    char digit = static_cast<char>(int_mantissa >> exp);
     int_mantissa &= mask;
     return digit;
   };
@@ -1245,7 +1272,7 @@ bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
     out->push_back(get_next_digit() + '0');
   }
 
-  int next_digit = get_next_digit();
+  char next_digit = get_next_digit();
   if (next_digit > 5 ||
       (next_digit == 5 && (int_mantissa || out->last_digit() % 2 == 1))) {
     RoundUp<mode>(out, exp_out);
@@ -1255,24 +1282,25 @@ bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
 }
 
 template <FormatStyle mode, typename Float>
-bool FloatToBuffer(Decomposed<Float> decomposed, int precision, Buffer *out,
-                   int *exp) {
+bool FloatToBuffer(Decomposed<Float> decomposed,
+                   size_t precision,
+                   Buffer* out,
+                   int* exp) {
   if (precision > kMaxFixedPrecision) return false;
 
   // Try with uint64_t.
   if (CanFitMantissa<Float, std::uint64_t>() &&
       FloatToBufferImpl<std::uint64_t, Float, mode>(
-          static_cast<std::uint64_t>(decomposed.mantissa),
-          static_cast<std::uint64_t>(decomposed.exponent), precision, out, exp))
+          static_cast<std::uint64_t>(decomposed.mantissa), decomposed.exponent,
+          precision, out, exp))
     return true;
 
 #if defined(ABSL_HAVE_INTRINSIC_INT128)
   // If that is not enough, try with __uint128_t.
   return CanFitMantissa<Float, __uint128_t>() &&
          FloatToBufferImpl<__uint128_t, Float, mode>(
-             static_cast<__uint128_t>(decomposed.mantissa),
-             static_cast<__uint128_t>(decomposed.exponent), precision, out,
-             exp);
+             static_cast<__uint128_t>(decomposed.mantissa), decomposed.exponent,
+             precision, out, exp);
 #endif
   return false;
 }
@@ -1280,12 +1308,15 @@ bool FloatToBuffer(Decomposed<Float> decomposed, int precision, Buffer *out,
 void WriteBufferToSink(char sign_char, absl::string_view str,
                        const FormatConversionSpecImpl &conv,
                        FormatSinkImpl *sink) {
-  int left_spaces = 0, zeros = 0, right_spaces = 0;
-  int missing_chars =
-      conv.width() >= 0 ? std::max(conv.width() - static_cast<int>(str.size()) -
-                                       static_cast<int>(sign_char != 0),
-                                   0)
-                        : 0;
+  size_t left_spaces = 0, zeros = 0, right_spaces = 0;
+  size_t missing_chars = 0;
+  if (conv.width() >= 0) {
+    const size_t conv_width_size_t = static_cast<size_t>(conv.width());
+    const size_t existing_chars =
+        str.size() + static_cast<size_t>(sign_char != 0);
+    if (conv_width_size_t > existing_chars)
+      missing_chars = conv_width_size_t - existing_chars;
+  }
   if (conv.has_left_flag()) {
     right_spaces = missing_chars;
   } else if (conv.has_zero_flag()) {
@@ -1321,7 +1352,8 @@ bool FloatToSink(const Float v, const FormatConversionSpecImpl &conv,
     return true;
   }
 
-  int precision = conv.precision() < 0 ? 6 : conv.precision();
+  size_t precision =
+      conv.precision() < 0 ? 6 : static_cast<size_t>(conv.precision());
 
   int exp = 0;
 
@@ -1348,12 +1380,12 @@ bool FloatToSink(const Float v, const FormatConversionSpecImpl &conv,
         &buffer);
   } else if (c == FormatConversionCharInternal::g ||
              c == FormatConversionCharInternal::G) {
-    precision = std::max(0, precision - 1);
+    precision = std::max(precision, size_t{1}) - 1;
     if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
                                                &exp)) {
       return FallbackToSnprintf(v, conv, sink);
     }
-    if (precision + 1 > exp && exp >= -4) {
+    if ((exp < 0 || precision + 1 > static_cast<size_t>(exp)) && exp >= -4) {
       if (exp < 0) {
         // Have 1.23456, needs 0.00123456
         // Move the first digit
@@ -1388,9 +1420,11 @@ bool FloatToSink(const Float v, const FormatConversionSpecImpl &conv,
     return false;
   }
 
-  WriteBufferToSink(sign_char,
-                    absl::string_view(buffer.begin, buffer.end - buffer.begin),
-                    conv, sink);
+  WriteBufferToSink(
+      sign_char,
+      absl::string_view(buffer.begin,
+                        static_cast<size_t>(buffer.end - buffer.begin)),
+      conv, sink);
 
   return true;
 }
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/output.h b/third_party/abseil-cpp/absl/strings/internal/str_format/output.h
index 8030dae00f..15e751ab6f 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/output.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/output.h
@@ -22,6 +22,7 @@
 #define ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
 
 #include <cstdio>
+#include <ios>
 #include <ostream>
 #include <string>
 
@@ -71,7 +72,7 @@ inline void AbslFormatFlush(std::string* out, string_view s) {
   out->append(s.data(), s.size());
 }
 inline void AbslFormatFlush(std::ostream* out, string_view s) {
-  out->write(s.data(), s.size());
+  out->write(s.data(), static_cast<std::streamsize>(s.size()));
 }
 
 inline void AbslFormatFlush(FILERawSink* sink, string_view v) {
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/parser.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/parser.cc
index 2c9c07dacc..13731ee247 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/parser.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/parser.cc
@@ -56,7 +56,7 @@ ABSL_CONST_INIT const ConvTag kTags[256] = {
     CC::X,  {},    {},    {},    {},    {},     {},    {},     // XYZ[\]^_
     {},     CC::a, {},    CC::c, CC::d, CC::e,  CC::f, CC::g,  // `abcdefg
     LM::h,  CC::i, LM::j, {},    LM::l, {},     CC::n, CC::o,  // hijklmno
-    CC::p,  LM::q, {},    CC::s, LM::t, CC::u,  {},    {},     // pqrstuvw
+    CC::p,  LM::q, {},    CC::s, LM::t, CC::u,  CC::v, {},     // pqrstuvw
     CC::x,  {},    LM::z, {},    {},    {},     {},    {},     // xyz{|}!
     {},     {},    {},    {},    {},    {},     {},    {},     // 80-87
     {},     {},    {},    {},    {},    {},     {},    {},     // 88-8f
@@ -202,6 +202,8 @@ const char *ConsumeConversion(const char *pos, const char *const end,
 
   auto tag = GetTagForChar(c);
 
+  if (ABSL_PREDICT_FALSE(c == 'v' && (pos - original_pos) != 1)) return nullptr;
+
   if (ABSL_PREDICT_FALSE(!tag.is_conv())) {
     if (ABSL_PREDICT_FALSE(!tag.is_length())) return nullptr;
 
@@ -219,6 +221,8 @@ const char *ConsumeConversion(const char *pos, const char *const end,
       conv->length_mod = length_mod;
     }
     tag = GetTagForChar(c);
+
+    if (ABSL_PREDICT_FALSE(c == 'v')) return nullptr;
     if (ABSL_PREDICT_FALSE(!tag.is_conv())) return nullptr;
   }
 
@@ -312,11 +316,11 @@ bool ParsedFormatBase::MatchesConversions(
     std::initializer_list<FormatConversionCharSet> convs) const {
   std::unordered_set<int> used;
   auto add_if_valid_conv = [&](int pos, char c) {
-      if (static_cast<size_t>(pos) > convs.size() ||
-          !Contains(convs.begin()[pos - 1], c))
-        return false;
-      used.insert(pos);
-      return true;
+    if (static_cast<size_t>(pos) > convs.size() ||
+        !Contains(convs.begin()[pos - 1], c))
+      return false;
+    used.insert(pos);
+    return true;
   };
   for (const ConversionItem &item : items_) {
     if (!item.is_conversion) continue;
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/parser.h b/third_party/abseil-cpp/absl/strings/internal/str_format/parser.h
index ad8646edff..a81bac8333 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/parser.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/parser.h
@@ -151,13 +151,15 @@ bool ParseFormatString(string_view src, Consumer consumer) {
   const char* p = src.data();
   const char* const end = p + src.size();
   while (p != end) {
-    const char* percent = static_cast<const char*>(memchr(p, '%', end - p));
+    const char* percent =
+        static_cast<const char*>(memchr(p, '%', static_cast<size_t>(end - p)));
     if (!percent) {
       // We found the last substring.
-      return consumer.Append(string_view(p, end - p));
+      return consumer.Append(string_view(p, static_cast<size_t>(end - p)));
     }
     // We found a percent, so push the text run then process the percent.
-    if (ABSL_PREDICT_FALSE(!consumer.Append(string_view(p, percent - p)))) {
+    if (ABSL_PREDICT_FALSE(!consumer.Append(
+            string_view(p, static_cast<size_t>(percent - p))))) {
       return false;
     }
     if (ABSL_PREDICT_FALSE(percent + 1 >= end)) return false;
@@ -188,7 +190,8 @@ bool ParseFormatString(string_view src, Consumer consumer) {
       p = ConsumeUnboundConversion(percent + 1, end, &conv, &next_arg);
       if (ABSL_PREDICT_FALSE(p == nullptr)) return false;
       if (ABSL_PREDICT_FALSE(!consumer.ConvertOne(
-          conv, string_view(percent + 1, p - (percent + 1))))) {
+              conv, string_view(percent + 1,
+                                static_cast<size_t>(p - (percent + 1)))))) {
         return false;
       }
     } else {
@@ -242,7 +245,8 @@ class ParsedFormatBase {
     string_view text(base, 0);
     for (const auto& item : items_) {
       const char* const end = text.data() + text.size();
-      text = string_view(end, (base + item.text_end) - end);
+      text =
+          string_view(end, static_cast<size_t>((base + item.text_end) - end));
       if (item.is_conversion) {
         if (!consumer.ConvertOne(item.conv, text)) return false;
       } else {
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_format/parser_test.cc b/third_party/abseil-cpp/absl/strings/internal/str_format/parser_test.cc
index fe0d296360..c3e825fe02 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_format/parser_test.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/str_format/parser_test.cc
@@ -110,10 +110,13 @@ TEST_F(ConsumeUnboundConversionTest, ConsumeSpecification) {
     {__LINE__, "ba",   "",     "ba"},  // 'b' is invalid
     {__LINE__, "l",    "",     "l" },  // just length mod isn't okay
     {__LINE__, "d",    "d",    ""  },  // basic
+    {__LINE__, "v",    "v",    ""  },  // basic
     {__LINE__, "d ",   "d",    " " },  // leave suffix
     {__LINE__, "dd",   "d",    "d" },  // don't be greedy
     {__LINE__, "d9",   "d",    "9" },  // leave non-space suffix
     {__LINE__, "dzz",  "d",    "zz"},  // length mod as suffix
+    {__LINE__, "3v",   "",     "3v"},  // 'v' cannot have modifiers
+    {__LINE__, "hv",   "",     "hv"},  // 'v' cannot have modifiers
     {__LINE__, "1$*2$d", "1$*2$d", ""  },  // arg indexing and * allowed.
     {__LINE__, "0-14.3hhd", "0-14.3hhd", ""},  // precision, width
     {__LINE__, " 0-+#14.3hhd", " 0-+#14.3hhd", ""},  // flags
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_join_internal.h b/third_party/abseil-cpp/absl/strings/internal/str_join_internal.h
index 31dbf672f0..d97d5033d8 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_join_internal.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_join_internal.h
@@ -229,10 +229,11 @@ std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
   std::string result;
   if (start != end) {
     // Sums size
-    size_t result_size = start->size();
+    auto&& start_value = *start;
+    size_t result_size = start_value.size();
     for (Iterator it = start; ++it != end;) {
       result_size += s.size();
-      result_size += it->size();
+      result_size += (*it).size();
     }
 
     if (result_size > 0) {
@@ -240,13 +241,15 @@ std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
 
       // Joins strings
       char* result_buf = &*result.begin();
-      memcpy(result_buf, start->data(), start->size());
-      result_buf += start->size();
+
+      memcpy(result_buf, start_value.data(), start_value.size());
+      result_buf += start_value.size();
       for (Iterator it = start; ++it != end;) {
         memcpy(result_buf, s.data(), s.size());
         result_buf += s.size();
-        memcpy(result_buf, it->data(), it->size());
-        result_buf += it->size();
+        auto&& value = *it;
+        memcpy(result_buf, value.data(), value.size());
+        result_buf += value.size();
       }
     }
   }
diff --git a/third_party/abseil-cpp/absl/strings/internal/str_split_internal.h b/third_party/abseil-cpp/absl/strings/internal/str_split_internal.h
index e766421617..35edf3aa43 100644
--- a/third_party/abseil-cpp/absl/strings/internal/str_split_internal.h
+++ b/third_party/abseil-cpp/absl/strings/internal/str_split_internal.h
@@ -132,7 +132,8 @@ class SplitIterator {
       const absl::string_view text = splitter_->text();
       const absl::string_view d = delimiter_.Find(text, pos_);
       if (d.data() == text.data() + text.size()) state_ = kLastState;
-      curr_ = text.substr(pos_, d.data() - (text.data() + pos_));
+      curr_ = text.substr(pos_,
+                          static_cast<size_t>(d.data() - (text.data() + pos_)));
       pos_ += curr_.size() + d.size();
     } while (!predicate_(curr_));
     return *this;
diff --git a/third_party/abseil-cpp/absl/strings/internal/string_constant.h b/third_party/abseil-cpp/absl/strings/internal/string_constant.h
index a11336b7f0..f68b17d75e 100644
--- a/third_party/abseil-cpp/absl/strings/internal/string_constant.h
+++ b/third_party/abseil-cpp/absl/strings/internal/string_constant.h
@@ -35,17 +35,25 @@ namespace strings_internal {
 // below.
 template <typename T>
 struct StringConstant {
+ private:
+  static constexpr bool TryConstexprEval(absl::string_view view) {
+    return view.empty() || 2 * view[0] != 1;
+  }
+
+ public:
   static constexpr absl::string_view value = T{}();
   constexpr absl::string_view operator()() const { return value; }
 
   // Check to be sure `view` points to constant data.
   // Otherwise, it can't be constant evaluated.
-  static_assert(value.empty() || 2 * value[0] != 1,
+  static_assert(TryConstexprEval(value),
                 "The input string_view must point to constant data.");
 };
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 template <typename T>
-constexpr absl::string_view StringConstant<T>::value;  // NOLINT
+constexpr absl::string_view StringConstant<T>::value;
+#endif
 
 // Factory function for `StringConstant` instances.
 // It supports callables that have a constexpr default constructor and a
diff --git a/third_party/abseil-cpp/absl/strings/internal/stringify_sink.cc b/third_party/abseil-cpp/absl/strings/internal/stringify_sink.cc
new file mode 100644
index 0000000000..7c6995abb1
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/stringify_sink.cc
@@ -0,0 +1,28 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/stringify_sink.h"
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace strings_internal {
+
+void StringifySink::Append(size_t count, char ch) { buffer_.append(count, ch); }
+
+void StringifySink::Append(string_view v) {
+  buffer_.append(v.data(), v.size());
+}
+
+}  // namespace strings_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/internal/stringify_sink.h b/third_party/abseil-cpp/absl/strings/internal/stringify_sink.h
new file mode 100644
index 0000000000..5e326a0b1c
--- /dev/null
+++ b/third_party/abseil-cpp/absl/strings/internal/stringify_sink.h
@@ -0,0 +1,66 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_STRINGS_INTERNAL_STRINGIFY_SINK_H_
+#define ABSL_STRINGS_INTERNAL_STRINGIFY_SINK_H_
+
+#include <string>
+#include <type_traits>
+#include <utility>
+
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+namespace strings_internal {
+class StringifySink {
+ public:
+  void Append(size_t count, char ch);
+
+  void Append(string_view v);
+
+  // Support `absl::Format(&sink, format, args...)`.
+  friend void AbslFormatFlush(StringifySink* sink, absl::string_view v) {
+    sink->Append(v);
+  }
+
+ private:
+  template <typename T>
+  friend string_view ExtractStringification(StringifySink& sink, const T& v);
+
+  std::string buffer_;
+};
+
+template <typename T>
+string_view ExtractStringification(StringifySink& sink, const T& v) {
+  AbslStringify(sink, v);
+  return sink.buffer_;
+}
+
+template <typename T, typename = void>
+struct HasAbslStringify : std::false_type {};
+
+template <typename T>
+struct HasAbslStringify<T, std::enable_if_t<std::is_void<decltype(AbslStringify(
+                               std::declval<strings_internal::StringifySink&>(),
+                               std::declval<const T&>()))>::value>>
+    : std::true_type {};
+
+}  // namespace strings_internal
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STRINGS_INTERNAL_STRINGIFY_SINK_H_
diff --git a/third_party/abseil-cpp/absl/strings/internal/utf8.cc b/third_party/abseil-cpp/absl/strings/internal/utf8.cc
index 8fd8edc1ec..7ecb93dfbe 100644
--- a/third_party/abseil-cpp/absl/strings/internal/utf8.cc
+++ b/third_party/abseil-cpp/absl/strings/internal/utf8.cc
@@ -25,25 +25,25 @@ size_t EncodeUTF8Char(char *buffer, char32_t utf8_char) {
     *buffer = static_cast<char>(utf8_char);
     return 1;
   } else if (utf8_char <= 0x7FF) {
-    buffer[1] = 0x80 | (utf8_char & 0x3F);
+    buffer[1] = static_cast<char>(0x80 | (utf8_char & 0x3F));
     utf8_char >>= 6;
-    buffer[0] = 0xC0 | utf8_char;
+    buffer[0] = static_cast<char>(0xC0 | utf8_char);
     return 2;
   } else if (utf8_char <= 0xFFFF) {
-    buffer[2] = 0x80 | (utf8_char & 0x3F);
+    buffer[2] = static_cast<char>(0x80 | (utf8_char & 0x3F));
     utf8_char >>= 6;
-    buffer[1] = 0x80 | (utf8_char & 0x3F);
+    buffer[1] = static_cast<char>(0x80 | (utf8_char & 0x3F));
     utf8_char >>= 6;
-    buffer[0] = 0xE0 | utf8_char;
+    buffer[0] = static_cast<char>(0xE0 | utf8_char);
     return 3;
   } else {
-    buffer[3] = 0x80 | (utf8_char & 0x3F);
+    buffer[3] = static_cast<char>(0x80 | (utf8_char & 0x3F));
     utf8_char >>= 6;
-    buffer[2] = 0x80 | (utf8_char & 0x3F);
+    buffer[2] = static_cast<char>(0x80 | (utf8_char & 0x3F));
     utf8_char >>= 6;
-    buffer[1] = 0x80 | (utf8_char & 0x3F);
+    buffer[1] = static_cast<char>(0x80 | (utf8_char & 0x3F));
     utf8_char >>= 6;
-    buffer[0] = 0xF0 | utf8_char;
+    buffer[0] = static_cast<char>(0xF0 | utf8_char);
     return 4;
   }
 }
diff --git a/third_party/abseil-cpp/absl/strings/numbers.cc b/third_party/abseil-cpp/absl/strings/numbers.cc
index cbd84c918b..2987158e07 100644
--- a/third_party/abseil-cpp/absl/strings/numbers.cc
+++ b/third_party/abseil-cpp/absl/strings/numbers.cc
@@ -190,32 +190,32 @@ char* numbers_internal::FastIntToBuffer(uint32_t i, char* buffer) {
     if (i >= 1000) goto lt10_000;
     digits = i / 100;
     i -= digits * 100;
-    *buffer++ = '0' + digits;
+    *buffer++ = '0' + static_cast<char>(digits);
     goto lt100;
   }
   if (i < 1000000) {  //    1,000,000
     if (i >= 100000) goto lt1_000_000;
     digits = i / 10000;  //    10,000
     i -= digits * 10000;
-    *buffer++ = '0' + digits;
+    *buffer++ = '0' + static_cast<char>(digits);
     goto lt10_000;
   }
   if (i < 100000000) {  //    100,000,000
     if (i >= 10000000) goto lt100_000_000;
     digits = i / 1000000;  //   1,000,000
     i -= digits * 1000000;
-    *buffer++ = '0' + digits;
+    *buffer++ = '0' + static_cast<char>(digits);
     goto lt1_000_000;
   }
   // we already know that i < 1,000,000,000
   digits = i / 100000000;  //   100,000,000
   i -= digits * 100000000;
-  *buffer++ = '0' + digits;
+  *buffer++ = '0' + static_cast<char>(digits);
   goto lt100_000_000;
 }
 
 char* numbers_internal::FastIntToBuffer(int32_t i, char* buffer) {
-  uint32_t u = i;
+  uint32_t u = static_cast<uint32_t>(i);
   if (i < 0) {
     *buffer++ = '-';
     // We need to do the negation in modular (i.e., "unsigned")
@@ -268,7 +268,7 @@ char* numbers_internal::FastIntToBuffer(uint64_t i, char* buffer) {
 }
 
 char* numbers_internal::FastIntToBuffer(int64_t i, char* buffer) {
-  uint64_t u = i;
+  uint64_t u = static_cast<uint64_t>(i);
   if (i < 0) {
     *buffer++ = '-';
     u = 0 - u;
@@ -329,7 +329,7 @@ static std::pair<uint64_t, uint64_t> PowFive(uint64_t num, int expfive) {
     result = Mul32(result, 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5);
     expfive -= 13;
   }
-  constexpr int powers_of_five[13] = {
+  constexpr uint32_t powers_of_five[13] = {
       1,
       5,
       5 * 5,
@@ -404,14 +404,14 @@ static ExpDigits SplitToSix(const double value) {
   // we multiply it by 65536 and see if the fractional part is close to 32768.
   // (The number doesn't have to be a power of two,but powers of two are faster)
   uint64_t d64k = d * 65536;
-  int dddddd;  // A 6-digit decimal integer.
+  uint32_t dddddd;  // A 6-digit decimal integer.
   if ((d64k % 65536) == 32767 || (d64k % 65536) == 32768) {
     // OK, it's fairly likely that precision was lost above, which is
     // not a surprise given only 52 mantissa bits are available.  Therefore
     // redo the calculation using 128-bit numbers.  (64 bits are not enough).
 
     // Start out with digits rounded down; maybe add one below.
-    dddddd = static_cast<int>(d64k / 65536);
+    dddddd = static_cast<uint32_t>(d64k / 65536);
 
     // mantissa is a 64-bit integer representing M.mmm... * 2^63.  The actual
     // value we're representing, of course, is M.mmm... * 2^exp2.
@@ -461,7 +461,7 @@ static ExpDigits SplitToSix(const double value) {
     }
   } else {
     // Here, we are not close to the edge.
-    dddddd = static_cast<int>((d64k + 32768) / 65536);
+    dddddd = static_cast<uint32_t>((d64k + 32768) / 65536);
   }
   if (dddddd == 1000000) {
     dddddd = 100000;
@@ -469,7 +469,7 @@ static ExpDigits SplitToSix(const double value) {
   }
   exp_dig.exponent = exp;
 
-  int two_digits = dddddd / 10000;
+  uint32_t two_digits = dddddd / 10000;
   dddddd -= two_digits * 10000;
   numbers_internal::PutTwoDigits(two_digits, &exp_dig.digits[0]);
 
@@ -499,7 +499,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
     if (std::signbit(d)) *out++ = '-';
     *out++ = '0';
     *out = 0;
-    return out - buffer;
+    return static_cast<size_t>(out - buffer);
   }
   if (d < 0) {
     *out++ = '-';
@@ -507,7 +507,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
   }
   if (d > std::numeric_limits<double>::max()) {
     strcpy(out, "inf");  // NOLINT(runtime/printf)
-    return out + 3 - buffer;
+    return static_cast<size_t>(out + 3 - buffer);
   }
 
   auto exp_dig = SplitToSix(d);
@@ -519,7 +519,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
     case 5:
       memcpy(out, &digits[0], 6), out += 6;
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
     case 4:
       memcpy(out, &digits[0], 5), out += 5;
       if (digits[5] != '0') {
@@ -527,7 +527,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
         *out++ = digits[5];
       }
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
     case 3:
       memcpy(out, &digits[0], 4), out += 4;
       if ((digits[5] | digits[4]) != '0') {
@@ -536,7 +536,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
         if (digits[5] != '0') *out++ = digits[5];
       }
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
     case 2:
       memcpy(out, &digits[0], 3), out += 3;
       *out++ = '.';
@@ -545,7 +545,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
       while (out[-1] == '0') --out;
       if (out[-1] == '.') --out;
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
     case 1:
       memcpy(out, &digits[0], 2), out += 2;
       *out++ = '.';
@@ -554,7 +554,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
       while (out[-1] == '0') --out;
       if (out[-1] == '.') --out;
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
     case 0:
       memcpy(out, &digits[0], 1), out += 1;
       *out++ = '.';
@@ -563,7 +563,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
       while (out[-1] == '0') --out;
       if (out[-1] == '.') --out;
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
     case -4:
       out[2] = '0';
       ++out;
@@ -582,7 +582,7 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
       out += 6;
       while (out[-1] == '0') --out;
       *out = 0;
-      return out - buffer;
+      return static_cast<size_t>(out - buffer);
   }
   assert(exp < -4 || exp >= 6);
   out[0] = digits[0];
@@ -601,12 +601,12 @@ size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
   if (exp > 99) {
     int dig1 = exp / 100;
     exp -= dig1 * 100;
-    *out++ = '0' + dig1;
+    *out++ = '0' + static_cast<char>(dig1);
   }
-  PutTwoDigits(exp, out);
+  PutTwoDigits(static_cast<uint32_t>(exp), out);
   out += 2;
   *out = 0;
-  return out - buffer;
+  return static_cast<size_t>(out - buffer);
 }
 
 namespace {
@@ -642,10 +642,12 @@ inline bool safe_parse_sign_and_base(absl::string_view* text /*inout*/,
   int base = *base_ptr;
 
   // Consume whitespace.
-  while (start < end && absl::ascii_isspace(start[0])) {
+  while (start < end &&
+         absl::ascii_isspace(static_cast<unsigned char>(start[0]))) {
     ++start;
   }
-  while (start < end && absl::ascii_isspace(end[-1])) {
+  while (start < end &&
+         absl::ascii_isspace(static_cast<unsigned char>(end[-1]))) {
     --end;
   }
   if (start >= end) {
@@ -694,7 +696,7 @@ inline bool safe_parse_sign_and_base(absl::string_view* text /*inout*/,
   } else {
     return false;
   }
-  *text = absl::string_view(start, end - start);
+  *text = absl::string_view(start, static_cast<size_t>(end - start));
   *base_ptr = base;
   return true;
 }
@@ -757,8 +759,8 @@ struct LookupTables {
 //
 // uint128& operator/=(uint128) is not constexpr, so hardcode the resulting
 // array to avoid a static initializer.
-template<>
-const uint128 LookupTables<uint128>::kVmaxOverBase[] = {
+template <>
+ABSL_CONST_INIT const uint128 LookupTables<uint128>::kVmaxOverBase[] = {
     0,
     0,
     MakeUint128(9223372036854775807u, 18446744073709551615u),
@@ -809,8 +811,8 @@ const uint128 LookupTables<uint128>::kVmaxOverBase[] = {
 //
 // int128& operator/=(int128) is not constexpr, so hardcode the resulting array
 // to avoid a static initializer.
-template<>
-const int128 LookupTables<int128>::kVmaxOverBase[] = {
+template <>
+ABSL_CONST_INIT const int128 LookupTables<int128>::kVmaxOverBase[] = {
     0,
     0,
     MakeInt128(4611686018427387903, 18446744073709551615u),
@@ -862,8 +864,8 @@ const int128 LookupTables<int128>::kVmaxOverBase[] = {
 //
 // int128& operator/=(int128) is not constexpr, so hardcode the resulting array
 // to avoid a static initializer.
-template<>
-const int128 LookupTables<int128>::kVminOverBase[] = {
+template <>
+ABSL_CONST_INIT const int128 LookupTables<int128>::kVminOverBase[] = {
     0,
     0,
     MakeInt128(-4611686018427387904, 0u),
@@ -904,11 +906,11 @@ const int128 LookupTables<int128>::kVminOverBase[] = {
 };
 
 template <typename IntType>
-const IntType LookupTables<IntType>::kVmaxOverBase[] =
+ABSL_CONST_INIT const IntType LookupTables<IntType>::kVmaxOverBase[] =
     X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::max());
 
 template <typename IntType>
-const IntType LookupTables<IntType>::kVminOverBase[] =
+ABSL_CONST_INIT const IntType LookupTables<IntType>::kVminOverBase[] =
     X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::min());
 
 #undef X_OVER_BASE_INITIALIZER
@@ -920,17 +922,18 @@ inline bool safe_parse_positive_int(absl::string_view text, int base,
   const IntType vmax = std::numeric_limits<IntType>::max();
   assert(vmax > 0);
   assert(base >= 0);
-  assert(vmax >= static_cast<IntType>(base));
+  const IntType base_inttype = static_cast<IntType>(base);
+  assert(vmax >= base_inttype);
   const IntType vmax_over_base = LookupTables<IntType>::kVmaxOverBase[base];
   assert(base < 2 ||
-         std::numeric_limits<IntType>::max() / base == vmax_over_base);
+         std::numeric_limits<IntType>::max() / base_inttype == vmax_over_base);
   const char* start = text.data();
   const char* end = start + text.size();
   // loop over digits
   for (; start < end; ++start) {
     unsigned char c = static_cast<unsigned char>(start[0]);
-    int digit = kAsciiToInt[c];
-    if (digit >= base) {
+    IntType digit = static_cast<IntType>(kAsciiToInt[c]);
+    if (digit >= base_inttype) {
       *value_p = value;
       return false;
     }
@@ -938,7 +941,7 @@ inline bool safe_parse_positive_int(absl::string_view text, int base,
       *value_p = vmax;
       return false;
     }
-    value *= base;
+    value *= base_inttype;
     if (value > vmax - digit) {
       *value_p = vmax;
       return false;
diff --git a/third_party/abseil-cpp/absl/strings/numbers.h b/third_party/abseil-cpp/absl/strings/numbers.h
index 4ae07c2d60..86c84ed39b 100644
--- a/third_party/abseil-cpp/absl/strings/numbers.h
+++ b/third_party/abseil-cpp/absl/strings/numbers.h
@@ -23,8 +23,12 @@
 #ifndef ABSL_STRINGS_NUMBERS_H_
 #define ABSL_STRINGS_NUMBERS_H_
 
-#ifdef __SSE4_2__
-#include <x86intrin.h>
+#ifdef __SSSE3__
+#include <tmmintrin.h>
+#endif
+
+#ifdef _MSC_VER
+#include <intrin.h>
 #endif
 
 #include <cstddef>
@@ -36,14 +40,7 @@
 #include <type_traits>
 
 #include "absl/base/config.h"
-#ifdef __SSE4_2__
-// TODO(jorg): Remove this when we figure out the right way
-// to swap bytes on SSE 4.2 that works with the compilers
-// we claim to support.  Also, add tests for the compiler
-// that doesn't support the Intel _bswap64 intrinsic but
-// does support all the SSE 4.2 intrinsics
 #include "absl/base/internal/endian.h"
-#endif
 #include "absl/base/macros.h"
 #include "absl/base/port.h"
 #include "absl/numeric/bits.h"
@@ -181,16 +178,19 @@ char* FastIntToBuffer(int_type i, char* buffer) {
   // TODO(jorg): This signed-ness check is used because it works correctly
   // with enums, and it also serves to check that int_type is not a pointer.
   // If one day something like std::is_signed<enum E> works, switch to it.
-  if (static_cast<int_type>(1) - 2 < 0) {  // Signed
-    if (sizeof(i) > 32 / 8) {           // 33-bit to 64-bit
+  // These conditions are constexpr bools to suppress MSVC warning C4127.
+  constexpr bool kIsSigned = static_cast<int_type>(1) - 2 < 0;
+  constexpr bool kUse64Bit = sizeof(i) > 32 / 8;
+  if (kIsSigned) {
+    if (kUse64Bit) {
       return FastIntToBuffer(static_cast<int64_t>(i), buffer);
-    } else {  // 32-bit or less
+    } else {
       return FastIntToBuffer(static_cast<int32_t>(i), buffer);
     }
-  } else {                     // Unsigned
-    if (sizeof(i) > 32 / 8) {  // 33-bit to 64-bit
+  } else {
+    if (kUse64Bit) {
       return FastIntToBuffer(static_cast<uint64_t>(i), buffer);
-    } else {  // 32-bit or less
+    } else {
       return FastIntToBuffer(static_cast<uint32_t>(i), buffer);
     }
   }
@@ -209,22 +209,25 @@ ABSL_MUST_USE_RESULT bool safe_strtoi_base(absl::string_view s, int_type* out,
   // TODO(jorg): This signed-ness check is used because it works correctly
   // with enums, and it also serves to check that int_type is not a pointer.
   // If one day something like std::is_signed<enum E> works, switch to it.
-  if (static_cast<int_type>(1) - 2 < 0) {  // Signed
-    if (sizeof(*out) == 64 / 8) {       // 64-bit
+  // These conditions are constexpr bools to suppress MSVC warning C4127.
+  constexpr bool kIsSigned = static_cast<int_type>(1) - 2 < 0;
+  constexpr bool kUse64Bit = sizeof(*out) == 64 / 8;
+  if (kIsSigned) {
+    if (kUse64Bit) {
       int64_t val;
       parsed = numbers_internal::safe_strto64_base(s, &val, base);
       *out = static_cast<int_type>(val);
-    } else {  // 32-bit
+    } else {
       int32_t val;
       parsed = numbers_internal::safe_strto32_base(s, &val, base);
       *out = static_cast<int_type>(val);
     }
-  } else {                         // Unsigned
-    if (sizeof(*out) == 64 / 8) {  // 64-bit
+  } else {
+    if (kUse64Bit) {
       uint64_t val;
       parsed = numbers_internal::safe_strtou64_base(s, &val, base);
       *out = static_cast<int_type>(val);
-    } else {  // 32-bit
+    } else {
       uint32_t val;
       parsed = numbers_internal::safe_strtou32_base(s, &val, base);
       *out = static_cast<int_type>(val);
@@ -240,7 +243,7 @@ ABSL_MUST_USE_RESULT bool safe_strtoi_base(absl::string_view s, int_type* out,
 // Returns the number of non-pad digits of the output (it can never be zero
 // since 0 has one digit).
 inline size_t FastHexToBufferZeroPad16(uint64_t val, char* out) {
-#ifdef __SSE4_2__
+#ifdef ABSL_INTERNAL_HAVE_SSSE3
   uint64_t be = absl::big_endian::FromHost64(val);
   const auto kNibbleMask = _mm_set1_epi8(0xf);
   const auto kHexDigits = _mm_setr_epi8('0', '1', '2', '3', '4', '5', '6', '7',
@@ -259,7 +262,7 @@ inline size_t FastHexToBufferZeroPad16(uint64_t val, char* out) {
   }
 #endif
   // | 0x1 so that even 0 has 1 digit.
-  return 16 - countl_zero(val | 0x1) / 4;
+  return 16 - static_cast<size_t>(countl_zero(val | 0x1) / 4);
 }
 
 }  // namespace numbers_internal
diff --git a/third_party/abseil-cpp/absl/strings/numbers_test.cc b/third_party/abseil-cpp/absl/strings/numbers_test.cc
index 498c210d3b..b3c098d1a8 100644
--- a/third_party/abseil-cpp/absl/strings/numbers_test.cc
+++ b/third_party/abseil-cpp/absl/strings/numbers_test.cc
@@ -19,6 +19,7 @@
 #include <sys/types.h>
 
 #include <cfenv>  // NOLINT(build/c++11)
+#include <cfloat>
 #include <cinttypes>
 #include <climits>
 #include <cmath>
@@ -388,9 +389,209 @@ TEST(NumbersTest, Atoi) {
 }
 
 TEST(NumbersTest, Atod) {
+  // DBL_TRUE_MIN and FLT_TRUE_MIN were not mandated in <cfloat> before C++17.
+#if !defined(DBL_TRUE_MIN)
+  static constexpr double DBL_TRUE_MIN =
+      4.940656458412465441765687928682213723650598026143247644255856825e-324;
+#endif
+#if !defined(FLT_TRUE_MIN)
+  static constexpr float FLT_TRUE_MIN =
+      1.401298464324817070923729583289916131280261941876515771757068284e-45f;
+#endif
+
   double d;
-  EXPECT_TRUE(absl::SimpleAtod("nan", &d));
+  float f;
+
+  // NaN can be spelled in multiple ways.
+  EXPECT_TRUE(absl::SimpleAtod("NaN", &d));
+  EXPECT_TRUE(std::isnan(d));
+  EXPECT_TRUE(absl::SimpleAtod("nAN", &d));
   EXPECT_TRUE(std::isnan(d));
+  EXPECT_TRUE(absl::SimpleAtod("-nan", &d));
+  EXPECT_TRUE(std::isnan(d));
+
+  // Likewise for Infinity.
+  EXPECT_TRUE(absl::SimpleAtod("inf", &d));
+  EXPECT_TRUE(std::isinf(d) && (d > 0));
+  EXPECT_TRUE(absl::SimpleAtod("+Infinity", &d));
+  EXPECT_TRUE(std::isinf(d) && (d > 0));
+  EXPECT_TRUE(absl::SimpleAtod("-INF", &d));
+  EXPECT_TRUE(std::isinf(d) && (d < 0));
+
+  // Parse DBL_MAX. Parsing something more than twice as big should also
+  // produce infinity.
+  EXPECT_TRUE(absl::SimpleAtod("1.7976931348623157e+308", &d));
+  EXPECT_EQ(d, 1.7976931348623157e+308);
+  EXPECT_TRUE(absl::SimpleAtod("5e308", &d));
+  EXPECT_TRUE(std::isinf(d) && (d > 0));
+  // Ditto, but for FLT_MAX.
+  EXPECT_TRUE(absl::SimpleAtof("3.4028234663852886e+38", &f));
+  EXPECT_EQ(f, 3.4028234663852886e+38f);
+  EXPECT_TRUE(absl::SimpleAtof("7e38", &f));
+  EXPECT_TRUE(std::isinf(f) && (f > 0));
+
+  // Parse the largest N such that parsing 1eN produces a finite value and the
+  // smallest M = N + 1 such that parsing 1eM produces infinity.
+  //
+  // The 309 exponent (and 39) confirms the "definition of
+  // kEiselLemireMaxExclExp10" comment in charconv.cc.
+  EXPECT_TRUE(absl::SimpleAtod("1e308", &d));
+  EXPECT_EQ(d, 1e308);
+  EXPECT_FALSE(std::isinf(d));
+  EXPECT_TRUE(absl::SimpleAtod("1e309", &d));
+  EXPECT_TRUE(std::isinf(d));
+  // Ditto, but for Atof instead of Atod.
+  EXPECT_TRUE(absl::SimpleAtof("1e38", &f));
+  EXPECT_EQ(f, 1e38f);
+  EXPECT_FALSE(std::isinf(f));
+  EXPECT_TRUE(absl::SimpleAtof("1e39", &f));
+  EXPECT_TRUE(std::isinf(f));
+
+  // Parse the largest N such that parsing 9.999999999999999999eN, with 19
+  // nines, produces a finite value.
+  //
+  // 9999999999999999999, with 19 nines but no decimal point, is the largest
+  // "repeated nines" integer that fits in a uint64_t.
+  EXPECT_TRUE(absl::SimpleAtod("9.999999999999999999e307", &d));
+  EXPECT_EQ(d, 9.999999999999999999e307);
+  EXPECT_FALSE(std::isinf(d));
+  EXPECT_TRUE(absl::SimpleAtod("9.999999999999999999e308", &d));
+  EXPECT_TRUE(std::isinf(d));
+  // Ditto, but for Atof instead of Atod.
+  EXPECT_TRUE(absl::SimpleAtof("9.999999999999999999e37", &f));
+  EXPECT_EQ(f, 9.999999999999999999e37f);
+  EXPECT_FALSE(std::isinf(f));
+  EXPECT_TRUE(absl::SimpleAtof("9.999999999999999999e38", &f));
+  EXPECT_TRUE(std::isinf(f));
+
+  // Parse DBL_MIN (normal), DBL_TRUE_MIN (subnormal) and (DBL_TRUE_MIN / 10)
+  // (effectively zero).
+  EXPECT_TRUE(absl::SimpleAtod("2.2250738585072014e-308", &d));
+  EXPECT_EQ(d, 2.2250738585072014e-308);
+  EXPECT_TRUE(absl::SimpleAtod("4.9406564584124654e-324", &d));
+  EXPECT_EQ(d, 4.9406564584124654e-324);
+  EXPECT_TRUE(absl::SimpleAtod("4.9406564584124654e-325", &d));
+  EXPECT_EQ(d, 0);
+  // Ditto, but for FLT_MIN, FLT_TRUE_MIN and (FLT_TRUE_MIN / 10).
+  EXPECT_TRUE(absl::SimpleAtof("1.1754943508222875e-38", &f));
+  EXPECT_EQ(f, 1.1754943508222875e-38f);
+  EXPECT_TRUE(absl::SimpleAtof("1.4012984643248171e-45", &f));
+  EXPECT_EQ(f, 1.4012984643248171e-45f);
+  EXPECT_TRUE(absl::SimpleAtof("1.4012984643248171e-46", &f));
+  EXPECT_EQ(f, 0);
+
+  // Parse the largest N (the most negative -N) such that parsing 1e-N produces
+  // a normal or subnormal (but still positive) or zero value.
+  EXPECT_TRUE(absl::SimpleAtod("1e-307", &d));
+  EXPECT_EQ(d, 1e-307);
+  EXPECT_GE(d, DBL_MIN);
+  EXPECT_LT(d, DBL_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtod("1e-323", &d));
+  EXPECT_EQ(d, 1e-323);
+  EXPECT_GE(d, DBL_TRUE_MIN);
+  EXPECT_LT(d, DBL_TRUE_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtod("1e-324", &d));
+  EXPECT_EQ(d, 0);
+  // Ditto, but for Atof instead of Atod.
+  EXPECT_TRUE(absl::SimpleAtof("1e-37", &f));
+  EXPECT_EQ(f, 1e-37f);
+  EXPECT_GE(f, FLT_MIN);
+  EXPECT_LT(f, FLT_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtof("1e-45", &f));
+  EXPECT_EQ(f, 1e-45f);
+  EXPECT_GE(f, FLT_TRUE_MIN);
+  EXPECT_LT(f, FLT_TRUE_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtof("1e-46", &f));
+  EXPECT_EQ(f, 0);
+
+  // Parse the largest N (the most negative -N) such that parsing
+  // 9.999999999999999999e-N, with 19 nines, produces a normal or subnormal
+  // (but still positive) or zero value.
+  //
+  // 9999999999999999999, with 19 nines but no decimal point, is the largest
+  // "repeated nines" integer that fits in a uint64_t.
+  //
+  // The -324/-325 exponents (and -46/-47) confirms the "definition of
+  // kEiselLemireMinInclExp10" comment in charconv.cc.
+  EXPECT_TRUE(absl::SimpleAtod("9.999999999999999999e-308", &d));
+  EXPECT_EQ(d, 9.999999999999999999e-308);
+  EXPECT_GE(d, DBL_MIN);
+  EXPECT_LT(d, DBL_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtod("9.999999999999999999e-324", &d));
+  EXPECT_EQ(d, 9.999999999999999999e-324);
+  EXPECT_GE(d, DBL_TRUE_MIN);
+  EXPECT_LT(d, DBL_TRUE_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtod("9.999999999999999999e-325", &d));
+  EXPECT_EQ(d, 0);
+  // Ditto, but for Atof instead of Atod.
+  EXPECT_TRUE(absl::SimpleAtof("9.999999999999999999e-38", &f));
+  EXPECT_EQ(f, 9.999999999999999999e-38f);
+  EXPECT_GE(f, FLT_MIN);
+  EXPECT_LT(f, FLT_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtof("9.999999999999999999e-46", &f));
+  EXPECT_EQ(f, 9.999999999999999999e-46f);
+  EXPECT_GE(f, FLT_TRUE_MIN);
+  EXPECT_LT(f, FLT_TRUE_MIN * 10);
+  EXPECT_TRUE(absl::SimpleAtof("9.999999999999999999e-47", &f));
+  EXPECT_EQ(f, 0);
+
+  // Leading and/or trailing whitespace is OK.
+  EXPECT_TRUE(absl::SimpleAtod("  \t\r\n  2.718", &d));
+  EXPECT_EQ(d, 2.718);
+  EXPECT_TRUE(absl::SimpleAtod("  3.141  ", &d));
+  EXPECT_EQ(d, 3.141);
+
+  // Leading or trailing not-whitespace is not OK.
+  EXPECT_FALSE(absl::SimpleAtod("n 0", &d));
+  EXPECT_FALSE(absl::SimpleAtod("0n ", &d));
+
+  // Multiple leading 0s are OK.
+  EXPECT_TRUE(absl::SimpleAtod("000123", &d));
+  EXPECT_EQ(d, 123);
+  EXPECT_TRUE(absl::SimpleAtod("000.456", &d));
+  EXPECT_EQ(d, 0.456);
+
+  // An absent leading 0 (for a fraction < 1) is OK.
+  EXPECT_TRUE(absl::SimpleAtod(".5", &d));
+  EXPECT_EQ(d, 0.5);
+  EXPECT_TRUE(absl::SimpleAtod("-.707", &d));
+  EXPECT_EQ(d, -0.707);
+
+  // Unary + is OK.
+  EXPECT_TRUE(absl::SimpleAtod("+6.0221408e+23", &d));
+  EXPECT_EQ(d, 6.0221408e+23);
+
+  // Underscores are not OK.
+  EXPECT_FALSE(absl::SimpleAtod("123_456", &d));
+
+  // The decimal separator must be '.' and is never ','.
+  EXPECT_TRUE(absl::SimpleAtod("8.9", &d));
+  EXPECT_FALSE(absl::SimpleAtod("8,9", &d));
+
+  // These examples are called out in the EiselLemire function's comments.
+  EXPECT_TRUE(absl::SimpleAtod("4503599627370497.5", &d));
+  EXPECT_EQ(d, 4503599627370497.5);
+  EXPECT_TRUE(absl::SimpleAtod("1e+23", &d));
+  EXPECT_EQ(d, 1e+23);
+  EXPECT_TRUE(absl::SimpleAtod("9223372036854775807", &d));
+  EXPECT_EQ(d, 9223372036854775807);
+  // Ditto, but for Atof instead of Atod.
+  EXPECT_TRUE(absl::SimpleAtof("0.0625", &f));
+  EXPECT_EQ(f, 0.0625f);
+  EXPECT_TRUE(absl::SimpleAtof("20040229.0", &f));
+  EXPECT_EQ(f, 20040229.0f);
+  EXPECT_TRUE(absl::SimpleAtof("2147483647.0", &f));
+  EXPECT_EQ(f, 2147483647.0f);
+
+  // Some parsing algorithms don't always round correctly (but absl::SimpleAtod
+  // should). This test case comes from
+  // https://github.com/serde-rs/json/issues/707
+  //
+  // See also atod_manual_test.cc for running many more test cases.
+  EXPECT_TRUE(absl::SimpleAtod("122.416294033786585", &d));
+  EXPECT_EQ(d, 122.416294033786585);
+  EXPECT_TRUE(absl::SimpleAtof("122.416294033786585", &f));
+  EXPECT_EQ(f, 122.416294033786585f);
 }
 
 TEST(NumbersTest, Prefixes) {
diff --git a/third_party/abseil-cpp/absl/strings/str_cat.cc b/third_party/abseil-cpp/absl/strings/str_cat.cc
index f4a77493a4..e5cb6d84e8 100644
--- a/third_party/abseil-cpp/absl/strings/str_cat.cc
+++ b/third_party/abseil-cpp/absl/strings/str_cat.cc
@@ -17,12 +17,15 @@
 #include <assert.h>
 
 #include <algorithm>
+#include <cstddef>
 #include <cstdint>
 #include <cstring>
+#include <string>
 
 #include "absl/strings/ascii.h"
 #include "absl/strings/internal/resize_uninitialized.h"
 #include "absl/strings/numbers.h"
+#include "absl/strings/string_view.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -56,7 +59,7 @@ AlphaNum::AlphaNum(Dec dec) {
     *--writer = '0' + (value % 10);
     value /= 10;
   }
-  *--writer = '0' + value;
+  *--writer = '0' + static_cast<char>(value);
   if (neg) *--writer = '-';
 
   ptrdiff_t fillers = writer - minfill;
@@ -73,7 +76,7 @@ AlphaNum::AlphaNum(Dec dec) {
     if (add_sign_again) *--writer = '-';
   }
 
-  piece_ = absl::string_view(writer, end - writer);
+  piece_ = absl::string_view(writer, static_cast<size_t>(end - writer));
 }
 
 // ----------------------------------------------------------------------
diff --git a/third_party/abseil-cpp/absl/strings/str_cat.h b/third_party/abseil-cpp/absl/strings/str_cat.h
index a8a85c7322..1a37faaea7 100644
--- a/third_party/abseil-cpp/absl/strings/str_cat.h
+++ b/third_party/abseil-cpp/absl/strings/str_cat.h
@@ -48,6 +48,40 @@
 // `StrCat()` or `StrAppend()`. You may specify a minimum hex field width using
 // a `PadSpec` enum.
 //
+// User-defined types can be formatted with the `AbslStringify()` customization
+// point. The API relies on detecting an overload in the user-defined type's
+// namespace of a free (non-member) `AbslStringify()` function as a definition
+// (typically declared as a friend and implemented in-line.
+// with the following signature:
+//
+// class MyClass { ... };
+//
+// template <typename Sink>
+// void AbslStringify(Sink& sink, const MyClass& value);
+//
+// An `AbslStringify()` overload for a type should only be declared in the same
+// file and namespace as said type.
+//
+// Note that `AbslStringify()` also supports use with `absl::StrFormat()` and
+// `absl::Substitute()`.
+//
+// Example:
+//
+// struct Point {
+//   // To add formatting support to `Point`, we simply need to add a free
+//   // (non-member) function `AbslStringify()`. This method specifies how
+//   // Point should be printed when absl::StrCat() is called on it. You can add
+//   // such a free function using a friend declaration within the body of the
+//   // class. The sink parameter is a templated type to avoid requiring
+//   // dependencies.
+//   template <typename Sink> friend void AbslStringify(Sink&
+//   sink, const Point& p) {
+//     absl::Format(&sink, "(%v, %v)", p.x, p.y);
+//   }
+//
+//   int x;
+//   int y;
+// };
 // -----------------------------------------------------------------------------
 
 #ifndef ABSL_STRINGS_STR_CAT_H_
@@ -57,9 +91,11 @@
 #include <cstdint>
 #include <string>
 #include <type_traits>
+#include <utility>
 #include <vector>
 
 #include "absl/base/port.h"
+#include "absl/strings/internal/stringify_sink.h"
 #include "absl/strings/numbers.h"
 #include "absl/strings/string_view.h"
 
@@ -214,23 +250,29 @@ class AlphaNum {
   // A bool ctor would also convert incoming pointers (bletch).
 
   AlphaNum(int x)  // NOLINT(runtime/explicit)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
+      : piece_(digits_, static_cast<size_t>(
+                            numbers_internal::FastIntToBuffer(x, digits_) -
+                            &digits_[0])) {}
   AlphaNum(unsigned int x)  // NOLINT(runtime/explicit)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
+      : piece_(digits_, static_cast<size_t>(
+                            numbers_internal::FastIntToBuffer(x, digits_) -
+                            &digits_[0])) {}
   AlphaNum(long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
+      : piece_(digits_, static_cast<size_t>(
+                            numbers_internal::FastIntToBuffer(x, digits_) -
+                            &digits_[0])) {}
   AlphaNum(unsigned long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
+      : piece_(digits_, static_cast<size_t>(
+                            numbers_internal::FastIntToBuffer(x, digits_) -
+                            &digits_[0])) {}
   AlphaNum(long long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
+      : piece_(digits_, static_cast<size_t>(
+                            numbers_internal::FastIntToBuffer(x, digits_) -
+                            &digits_[0])) {}
   AlphaNum(unsigned long long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
+      : piece_(digits_, static_cast<size_t>(
+                            numbers_internal::FastIntToBuffer(x, digits_) -
+                            &digits_[0])) {}
 
   AlphaNum(float f)  // NOLINT(runtime/explicit)
       : piece_(digits_, numbers_internal::SixDigitsToBuffer(f, digits_)) {}
@@ -245,9 +287,17 @@ class AlphaNum {
       const strings_internal::AlphaNumBuffer<size>& buf)
       : piece_(&buf.data[0], buf.size) {}
 
-  AlphaNum(const char* c_str) : piece_(c_str) {}  // NOLINT(runtime/explicit)
+  AlphaNum(const char* c_str)                     // NOLINT(runtime/explicit)
+      : piece_(NullSafeStringView(c_str)) {}      // NOLINT(runtime/explicit)
   AlphaNum(absl::string_view pc) : piece_(pc) {}  // NOLINT(runtime/explicit)
 
+  template <typename T, typename = typename std::enable_if<
+                            strings_internal::HasAbslStringify<T>::value>::type>
+  AlphaNum(                                         // NOLINT(runtime/explicit)
+      const T& v,                                   // NOLINT(runtime/explicit)
+      strings_internal::StringifySink&& sink = {})  // NOLINT(runtime/explicit)
+      : piece_(strings_internal::ExtractStringification(sink, v)) {}
+
   template <typename Allocator>
   AlphaNum(  // NOLINT(runtime/explicit)
       const std::basic_string<char, std::char_traits<char>, Allocator>& str)
diff --git a/third_party/abseil-cpp/absl/strings/str_cat_test.cc b/third_party/abseil-cpp/absl/strings/str_cat_test.cc
index f3770dc076..1b3b7eceaa 100644
--- a/third_party/abseil-cpp/absl/strings/str_cat_test.cc
+++ b/third_party/abseil-cpp/absl/strings/str_cat_test.cc
@@ -21,6 +21,7 @@
 #include <vector>
 
 #include "gtest/gtest.h"
+#include "absl/strings/str_format.h"
 #include "absl/strings/substitute.h"
 
 #ifdef __ANDROID__
@@ -210,6 +211,11 @@ TEST(StrCat, CornerCases) {
   EXPECT_EQ(result, "");
 }
 
+TEST(StrCat, NullConstCharPtr) {
+  const char* null = nullptr;
+  EXPECT_EQ(absl::StrCat("mon", null, "key"), "monkey");
+}
+
 // A minimal allocator that uses malloc().
 template <typename T>
 struct Mallocator {
@@ -607,4 +613,41 @@ TEST(Numbers, TestFunctionsMovedOverFromNumbersMain) {
   TestFastPrints();
 }
 
+struct PointStringify {
+  template <typename FormatSink>
+  friend void AbslStringify(FormatSink& sink, const PointStringify& p) {
+    sink.Append("(");
+    sink.Append(absl::StrCat(p.x));
+    sink.Append(", ");
+    sink.Append(absl::StrCat(p.y));
+    sink.Append(")");
+  }
+
+  double x = 10.0;
+  double y = 20.0;
+};
+
+TEST(StrCat, AbslStringifyExample) {
+  PointStringify p;
+  EXPECT_EQ(absl::StrCat(p), "(10, 20)");
+  EXPECT_EQ(absl::StrCat("a ", p, " z"), "a (10, 20) z");
+}
+
+struct PointStringifyUsingFormat {
+  template <typename FormatSink>
+  friend void AbslStringify(FormatSink& sink,
+                            const PointStringifyUsingFormat& p) {
+    absl::Format(&sink, "(%g, %g)", p.x, p.y);
+  }
+
+  double x = 10.0;
+  double y = 20.0;
+};
+
+TEST(StrCat, AbslStringifyExampleUsingFormat) {
+  PointStringifyUsingFormat p;
+  EXPECT_EQ(absl::StrCat(p), "(10, 20)");
+  EXPECT_EQ(absl::StrCat("a ", p, " z"), "a (10, 20) z");
+}
+
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/strings/str_format.h b/third_party/abseil-cpp/absl/strings/str_format.h
index 4b05c70c23..43d861864a 100644
--- a/third_party/abseil-cpp/absl/strings/str_format.h
+++ b/third_party/abseil-cpp/absl/strings/str_format.h
@@ -570,6 +570,41 @@ ABSL_MUST_USE_RESULT inline bool FormatUntyped(
 // StrFormat Extensions
 //------------------------------------------------------------------------------
 //
+// AbslStringify()
+//
+// A simpler customization API for formatting user-defined types using
+// absl::StrFormat(). The API relies on detecting an overload in the
+// user-defined type's namespace of a free (non-member) `AbslStringify()`
+// function as a friend definition with the following signature:
+//
+// template <typename Sink>
+// void AbslStringify(Sink& sink, const X& value);
+//
+// An `AbslStringify()` overload for a type should only be declared in the same
+// file and namespace as said type.
+//
+// Note that unlike with AbslFormatConvert(), AbslStringify() does not allow
+// customization of allowed conversion characters. AbslStringify() uses `%v` as
+// the underlying conversion specififer. Additionally, AbslStringify() supports
+// use with absl::StrCat while AbslFormatConvert() does not.
+//
+// Example:
+//
+// struct Point {
+//   // To add formatting support to `Point`, we simply need to add a free
+//   // (non-member) function `AbslStringify()`. This method prints in the
+//   // request format using the underlying `%v` specifier. You can add such a
+//   // free function using a friend declaration within the body of the class.
+//   // The sink parameter is a templated type to avoid requiring dependencies.
+//   template <typename Sink>
+//   friend void AbslStringify(Sink& sink, const Point& p) {
+//     absl::Format(&sink, "(%v, %v)", p.x, p.y);
+//   }
+//
+//   int x;
+//   int y;
+// };
+//
 // AbslFormatConvert()
 //
 // The StrFormat library provides a customization API for formatting
@@ -616,9 +651,9 @@ ABSL_MUST_USE_RESULT inline bool FormatUntyped(
 //   AbslFormatConvert(const Point& p, const absl::FormatConversionSpec& spec,
 //                     absl::FormatSink* s) {
 //     if (spec.conversion_char() == absl::FormatConversionChar::s) {
-//       s->Append(absl::StrCat("x=", p.x, " y=", p.y));
+//       absl::Format(s, "x=%vy=%v", p.x, p.y);
 //     } else {
-//       s->Append(absl::StrCat(p.x, ",", p.y));
+//       absl::Format(s, "%v,%v", p.x, p.y);
 //     }
 //     return {true};
 //   }
@@ -637,7 +672,7 @@ enum class FormatConversionChar : uint8_t {
   c, s,                    // text
   d, i, o, u, x, X,        // int
   f, F, e, E, g, G, a, A,  // float
-  n, p                     // misc
+  n, p, v                  // misc
 };
 // clang-format on
 
@@ -757,6 +792,7 @@ enum class FormatConversionCharSet : uint64_t {
   // misc
   n = str_format_internal::FormatConversionCharToConvInt('n'),
   p = str_format_internal::FormatConversionCharToConvInt('p'),
+  v = str_format_internal::FormatConversionCharToConvInt('v'),
 
   // Used for width/precision '*' specification.
   kStar = static_cast<uint64_t>(
@@ -788,6 +824,11 @@ class FormatSink {
     return sink_->PutPaddedString(v, width, precision, left);
   }
 
+  // Support `absl::Format(&sink, format, args...)`.
+  friend void AbslFormatFlush(FormatSink* sink, absl::string_view v) {
+    sink->Append(v);
+  }
+
  private:
   friend str_format_internal::FormatSinkImpl;
   explicit FormatSink(str_format_internal::FormatSinkImpl* s) : sink_(s) {}
diff --git a/third_party/abseil-cpp/absl/strings/str_format_test.cc b/third_party/abseil-cpp/absl/strings/str_format_test.cc
index c60027ad29..62ed262d6d 100644
--- a/third_party/abseil-cpp/absl/strings/str_format_test.cc
+++ b/third_party/abseil-cpp/absl/strings/str_format_test.cc
@@ -42,6 +42,18 @@ TEST_F(FormatEntryPointTest, Format) {
   EXPECT_TRUE(Format(&sink, pc, 123));
   EXPECT_EQ("A format 123", sink);
 }
+
+TEST_F(FormatEntryPointTest, FormatWithV) {
+  std::string sink;
+  EXPECT_TRUE(Format(&sink, "A format %v", 123));
+  EXPECT_EQ("A format 123", sink);
+  sink.clear();
+
+  ParsedFormat<'v'> pc("A format %v");
+  EXPECT_TRUE(Format(&sink, pc, 123));
+  EXPECT_EQ("A format 123", sink);
+}
+
 TEST_F(FormatEntryPointTest, UntypedFormat) {
   constexpr const char* formats[] = {
     "",
@@ -84,6 +96,14 @@ TEST_F(FormatEntryPointTest, StringFormat) {
   EXPECT_EQ("=123=", StrFormat(view, 123));
 }
 
+TEST_F(FormatEntryPointTest, StringFormatV) {
+  std::string hello = "hello";
+  EXPECT_EQ("hello", StrFormat("%v", hello));
+  EXPECT_EQ("123", StrFormat("%v", 123));
+  constexpr absl::string_view view("=%v=", 4);
+  EXPECT_EQ("=123=", StrFormat(view, 123));
+}
+
 TEST_F(FormatEntryPointTest, AppendFormat) {
   std::string s;
   std::string& r = StrAppendFormat(&s, "%d", 123);
@@ -91,6 +111,13 @@ TEST_F(FormatEntryPointTest, AppendFormat) {
   EXPECT_EQ("123", r);
 }
 
+TEST_F(FormatEntryPointTest, AppendFormatWithV) {
+  std::string s;
+  std::string& r = StrAppendFormat(&s, "%v", 123);
+  EXPECT_EQ(&s, &r);  // should be same object
+  EXPECT_EQ("123", r);
+}
+
 TEST_F(FormatEntryPointTest, AppendFormatFail) {
   std::string s = "orig";
 
@@ -103,6 +130,17 @@ TEST_F(FormatEntryPointTest, AppendFormatFail) {
                 {&arg, 1}));
 }
 
+TEST_F(FormatEntryPointTest, AppendFormatFailWithV) {
+  std::string s = "orig";
+
+  UntypedFormatSpec format(" more %v");
+  FormatArgImpl arg("not an int");
+
+  EXPECT_EQ("orig",
+            str_format_internal::AppendPack(
+                &s, str_format_internal::UntypedFormatSpecImpl::Extract(format),
+                {&arg, 1}));
+}
 
 TEST_F(FormatEntryPointTest, ManyArgs) {
   EXPECT_EQ("24", StrFormat("%24$d", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
@@ -123,6 +161,15 @@ TEST_F(FormatEntryPointTest, Preparsed) {
   EXPECT_EQ("=123=", StrFormat(ParsedFormat<'d'>(view), 123));
 }
 
+TEST_F(FormatEntryPointTest, PreparsedWithV) {
+  ParsedFormat<'v'> pc("%v");
+  EXPECT_EQ("123", StrFormat(pc, 123));
+  // rvalue ok?
+  EXPECT_EQ("123", StrFormat(ParsedFormat<'v'>("%v"), 123));
+  constexpr absl::string_view view("=%v=", 4);
+  EXPECT_EQ("=123=", StrFormat(ParsedFormat<'v'>(view), 123));
+}
+
 TEST_F(FormatEntryPointTest, FormatCountCapture) {
   int n = 0;
   EXPECT_EQ("", StrFormat("%n", FormatCountCapture(&n)));
@@ -131,6 +178,14 @@ TEST_F(FormatEntryPointTest, FormatCountCapture) {
   EXPECT_EQ(3, n);
 }
 
+TEST_F(FormatEntryPointTest, FormatCountCaptureWithV) {
+  int n = 0;
+  EXPECT_EQ("", StrFormat("%n", FormatCountCapture(&n)));
+  EXPECT_EQ(0, n);
+  EXPECT_EQ("123", StrFormat("%v%n", 123, FormatCountCapture(&n)));
+  EXPECT_EQ(3, n);
+}
+
 TEST_F(FormatEntryPointTest, FormatCountCaptureWrongType) {
   // Should reject int*.
   int n = 0;
@@ -143,6 +198,18 @@ TEST_F(FormatEntryPointTest, FormatCountCaptureWrongType) {
                     absl::MakeSpan(args)));
 }
 
+TEST_F(FormatEntryPointTest, FormatCountCaptureWrongTypeWithV) {
+  // Should reject int*.
+  int n = 0;
+  UntypedFormatSpec format("%v%n");
+  int i = 123, *ip = &n;
+  FormatArgImpl args[2] = {FormatArgImpl(i), FormatArgImpl(ip)};
+
+  EXPECT_EQ("", str_format_internal::FormatPack(
+                    str_format_internal::UntypedFormatSpecImpl::Extract(format),
+                    absl::MakeSpan(args)));
+}
+
 TEST_F(FormatEntryPointTest, FormatCountCaptureMultiple) {
   int n1 = 0;
   int n2 = 0;
@@ -165,6 +232,21 @@ TEST_F(FormatEntryPointTest, FormatCountCaptureExample) {
       s);
 }
 
+TEST_F(FormatEntryPointTest, FormatCountCaptureExampleWithV) {
+  int n;
+  std::string s;
+  std::string a1 = "(1,1)";
+  std::string a2 = "(1,2)";
+  std::string a3 = "(2,2)";
+  StrAppendFormat(&s, "%v: %n%v\n", a1, FormatCountCapture(&n), a2);
+  StrAppendFormat(&s, "%*s%v\n", n, "", a3);
+  EXPECT_EQ(7, n);
+  EXPECT_EQ(
+      "(1,1): (1,2)\n"
+      "       (2,2)\n",
+      s);
+}
+
 TEST_F(FormatEntryPointTest, Stream) {
   const std::string formats[] = {
     "",
@@ -183,7 +265,7 @@ TEST_F(FormatEntryPointTest, Stream) {
     std::ostringstream oss;
     oss << StreamFormat(*parsed, 123, 3, 49, "multistreaming!!!", 1.01, 1.01);
     int fmt_result = snprintf(&*buf.begin(), buf.size(), fmt.c_str(),  //
-                                 123, 3, 49, "multistreaming!!!", 1.01, 1.01);
+                              123, 3, 49, "multistreaming!!!", 1.01, 1.01);
     ASSERT_TRUE(oss) << fmt;
     ASSERT_TRUE(fmt_result >= 0 && static_cast<size_t>(fmt_result) < buf.size())
         << fmt_result;
@@ -191,6 +273,36 @@ TEST_F(FormatEntryPointTest, Stream) {
   }
 }
 
+TEST_F(FormatEntryPointTest, StreamWithV) {
+  const std::string formats[] = {
+      "",
+      "a",
+      "%v %u %c %v %f %v",
+  };
+
+  const std::string formats_for_buf[] = {
+      "",
+      "a",
+      "%d %u %c %s %f %g",
+  };
+
+  std::string buf(4096, '\0');
+  for (auto i = 0; i < ABSL_ARRAYSIZE(formats); ++i) {
+    const auto parsed =
+        ParsedFormat<'v', 'u', 'c', 'v', 'f', 'v'>::NewAllowIgnored(formats[i]);
+    std::ostringstream oss;
+    oss << StreamFormat(*parsed, 123, 3, 49,
+                        absl::string_view("multistreaming!!!"), 1.01, 1.01);
+    int fmt_result =
+        snprintf(&*buf.begin(), buf.size(), formats_for_buf[i].c_str(),  //
+                 123, 3, 49, "multistreaming!!!", 1.01, 1.01);
+    ASSERT_TRUE(oss) << formats[i];
+    ASSERT_TRUE(fmt_result >= 0 && static_cast<size_t>(fmt_result) < buf.size())
+        << fmt_result;
+    EXPECT_EQ(buf.c_str(), oss.str());
+  }
+}
+
 TEST_F(FormatEntryPointTest, StreamOk) {
   std::ostringstream oss;
   oss << StreamFormat("hello %d", 123);
@@ -198,6 +310,13 @@ TEST_F(FormatEntryPointTest, StreamOk) {
   EXPECT_TRUE(oss.good());
 }
 
+TEST_F(FormatEntryPointTest, StreamOkWithV) {
+  std::ostringstream oss;
+  oss << StreamFormat("hello %v", 123);
+  EXPECT_EQ("hello 123", oss.str());
+  EXPECT_TRUE(oss.good());
+}
+
 TEST_F(FormatEntryPointTest, StreamFail) {
   std::ostringstream oss;
   UntypedFormatSpec format("hello %d");
@@ -208,6 +327,16 @@ TEST_F(FormatEntryPointTest, StreamFail) {
   EXPECT_TRUE(oss.fail());
 }
 
+TEST_F(FormatEntryPointTest, StreamFailWithV) {
+  std::ostringstream oss;
+  UntypedFormatSpec format("hello %v");
+  FormatArgImpl arg("non-numeric");
+  oss << str_format_internal::Streamable(
+      str_format_internal::UntypedFormatSpecImpl::Extract(format), {&arg, 1});
+  EXPECT_EQ("hello ", oss.str());  // partial write
+  EXPECT_TRUE(oss.fail());
+}
+
 std::string WithSnprintf(const char* fmt, ...) {
   std::string buf;
   buf.resize(128);
@@ -249,6 +378,12 @@ TEST_F(FormatEntryPointTest, FormatStreamed) {
   EXPECT_EQ("123", StrFormat("%s", FormatStreamed(StreamFormat("%d", 123))));
 }
 
+TEST_F(FormatEntryPointTest, FormatStreamedWithV) {
+  EXPECT_EQ("123", StrFormat("%v", FormatStreamed(123)));
+  EXPECT_EQ("X", StrFormat("%v", FormatStreamed(streamed_test::X())));
+  EXPECT_EQ("123", StrFormat("%v", FormatStreamed(StreamFormat("%d", 123))));
+}
+
 // Helper class that creates a temporary file and exposes a FILE* to it.
 // It will close the file on destruction.
 class TempFile {
@@ -284,6 +419,14 @@ TEST_F(FormatEntryPointTest, FPrintF) {
   EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
 }
 
+TEST_F(FormatEntryPointTest, FPrintFWithV) {
+  TempFile tmp;
+  int result =
+      FPrintF(tmp.file(), "STRING: %v NUMBER: %010d", std::string("ABC"), -19);
+  EXPECT_EQ(result, 30);
+  EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
+}
+
 TEST_F(FormatEntryPointTest, FPrintFError) {
   errno = 0;
   int result = FPrintF(stdin, "ABC");
@@ -318,6 +461,23 @@ TEST_F(FormatEntryPointTest, PrintF) {
   EXPECT_EQ(result, 30);
   EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
 }
+
+TEST_F(FormatEntryPointTest, PrintFWithV) {
+  int stdout_tmp = dup(STDOUT_FILENO);
+
+  TempFile tmp;
+  std::fflush(stdout);
+  dup2(fileno(tmp.file()), STDOUT_FILENO);
+
+  int result = PrintF("STRING: %v NUMBER: %010d", std::string("ABC"), -19);
+
+  std::fflush(stdout);
+  dup2(stdout_tmp, STDOUT_FILENO);
+  close(stdout_tmp);
+
+  EXPECT_EQ(result, 30);
+  EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
+}
 #endif  // __GLIBC__
 
 TEST_F(FormatEntryPointTest, SNPrintF) {
@@ -347,9 +507,41 @@ TEST_F(FormatEntryPointTest, SNPrintF) {
   EXPECT_EQ(result, 37);
 }
 
+TEST_F(FormatEntryPointTest, SNPrintFWithV) {
+  char buffer[16];
+  int result =
+      SNPrintF(buffer, sizeof(buffer), "STRING: %v", std::string("ABC"));
+  EXPECT_EQ(result, 11);
+  EXPECT_EQ(std::string(buffer), "STRING: ABC");
+
+  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %v", 123456);
+  EXPECT_EQ(result, 14);
+  EXPECT_EQ(std::string(buffer), "NUMBER: 123456");
+
+  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %v", 1234567);
+  EXPECT_EQ(result, 15);
+  EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
+
+  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %v", 12345678);
+  EXPECT_EQ(result, 16);
+  EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
+
+  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %v", 123456789);
+  EXPECT_EQ(result, 17);
+  EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
+
+  std::string size = "size";
+
+  result = SNPrintF(nullptr, 0, "Just checking the %v of the output.", size);
+  EXPECT_EQ(result, 37);
+}
+
 TEST(StrFormat, BehavesAsDocumented) {
   std::string s = absl::StrFormat("%s, %d!", "Hello", 123);
   EXPECT_EQ("Hello, 123!", s);
+  std::string hello = "Hello";
+  std::string s2 = absl::StrFormat("%v, %v!", hello, 123);
+  EXPECT_EQ("Hello, 123!", s2);
   // The format of a replacement is
   // '%'[position][flags][width['.'precision]][length_modifier][format]
   EXPECT_EQ(absl::StrFormat("%1$+3.2Lf", 1.1), "+1.10");
@@ -364,22 +556,31 @@ TEST(StrFormat, BehavesAsDocumented) {
   //     "s" - string       Eg: "C" -> "C", std::string("C++") -> "C++"
   //           Formats std::string, char*, string_view, and Cord.
   EXPECT_EQ(StrFormat("%s", "C"), "C");
+  EXPECT_EQ(StrFormat("%v", std::string("C")), "C");
   EXPECT_EQ(StrFormat("%s", std::string("C++")), "C++");
+  EXPECT_EQ(StrFormat("%v", std::string("C++")), "C++");
   EXPECT_EQ(StrFormat("%s", string_view("view")), "view");
+  EXPECT_EQ(StrFormat("%v", string_view("view")), "view");
   EXPECT_EQ(StrFormat("%s", absl::Cord("cord")), "cord");
+  EXPECT_EQ(StrFormat("%v", absl::Cord("cord")), "cord");
   // Integral Conversion
   //     These format integral types: char, int, long, uint64_t, etc.
   EXPECT_EQ(StrFormat("%d", char{10}), "10");
   EXPECT_EQ(StrFormat("%d", int{10}), "10");
   EXPECT_EQ(StrFormat("%d", long{10}), "10");  // NOLINT
   EXPECT_EQ(StrFormat("%d", uint64_t{10}), "10");
+  EXPECT_EQ(StrFormat("%v", int{10}), "10");
+  EXPECT_EQ(StrFormat("%v", long{10}), "10");  // NOLINT
+  EXPECT_EQ(StrFormat("%v", uint64_t{10}), "10");
   //     d,i - signed decimal          Eg: -10 -> "-10"
   EXPECT_EQ(StrFormat("%d", -10), "-10");
   EXPECT_EQ(StrFormat("%i", -10), "-10");
+  EXPECT_EQ(StrFormat("%v", -10), "-10");
   //      o  - octal                   Eg:  10 -> "12"
   EXPECT_EQ(StrFormat("%o", 10), "12");
   //      u  - unsigned decimal        Eg:  10 -> "10"
   EXPECT_EQ(StrFormat("%u", 10), "10");
+  EXPECT_EQ(StrFormat("%v", 10), "10");
   //     x/X - lower,upper case hex    Eg:  10 -> "a"/"A"
   EXPECT_EQ(StrFormat("%x", 10), "a");
   EXPECT_EQ(StrFormat("%X", 10), "A");
@@ -404,6 +605,8 @@ TEST(StrFormat, BehavesAsDocumented) {
   EXPECT_EQ(StrFormat("%g", .01), "0.01");
   EXPECT_EQ(StrFormat("%g", 1e10), "1e+10");
   EXPECT_EQ(StrFormat("%G", 1e10), "1E+10");
+  EXPECT_EQ(StrFormat("%v", .01), "0.01");
+  EXPECT_EQ(StrFormat("%v", 1e10), "1e+10");
   //     a/A - lower,upper case hex    Eg: -3.0 -> "-0x1.8p+1"/"-0X1.8P+1"
 
 // On Android platform <=21, there is a regression in hexfloat formatting.
@@ -441,6 +644,11 @@ TEST(StrFormat, BehavesAsDocumented) {
   EXPECT_EQ(StrFormat("%zd", int{1}), "1");
   EXPECT_EQ(StrFormat("%td", int{1}), "1");
   EXPECT_EQ(StrFormat("%qd", int{1}), "1");
+
+  // Bool is handled correctly depending on whether %v is used
+  EXPECT_EQ(StrFormat("%v", true), "true");
+  EXPECT_EQ(StrFormat("%v", false), "false");
+  EXPECT_EQ(StrFormat("%d", true), "1");
 }
 
 using str_format_internal::ExtendedParsedFormat;
@@ -490,6 +698,15 @@ TEST_F(ParsedFormatTest, SimpleChecked) {
             SummarizeParsedFormat(ParsedFormat<'s', '*', 'd'>("%s %.*d")));
 }
 
+TEST_F(ParsedFormatTest, SimpleCheckedWithV) {
+  EXPECT_EQ("[ABC]{v:1$v}[DEF]",
+            SummarizeParsedFormat(ParsedFormat<'v'>("ABC%vDEF")));
+  EXPECT_EQ("{v:1$v}[FFF]{v:2$v}[ZZZ]{f:3$f}",
+            SummarizeParsedFormat(ParsedFormat<'v', 'v', 'f'>("%vFFF%vZZZ%f")));
+  EXPECT_EQ("{v:1$v}[ ]{.*d:3$.2$*d}",
+            SummarizeParsedFormat(ParsedFormat<'v', '*', 'd'>("%v %.*d")));
+}
+
 TEST_F(ParsedFormatTest, SimpleUncheckedCorrect) {
   auto f = ParsedFormat<'d'>::New("ABC%dDEF");
   ASSERT_TRUE(f);
@@ -520,6 +737,23 @@ TEST_F(ParsedFormatTest, SimpleUncheckedCorrect) {
             SummarizeParsedFormat(*dollar));
 }
 
+TEST_F(ParsedFormatTest, SimpleUncheckedCorrectWithV) {
+  auto f = ParsedFormat<'v'>::New("ABC%vDEF");
+  ASSERT_TRUE(f);
+  EXPECT_EQ("[ABC]{v:1$v}[DEF]", SummarizeParsedFormat(*f));
+
+  std::string format = "%vFFF%vZZZ%f";
+  auto f2 = ParsedFormat<'v', 'v', 'f'>::New(format);
+
+  ASSERT_TRUE(f2);
+  EXPECT_EQ("{v:1$v}[FFF]{v:2$v}[ZZZ]{f:3$f}", SummarizeParsedFormat(*f2));
+
+  f2 = ParsedFormat<'v', 'v', 'f'>::New("%v %v %f");
+
+  ASSERT_TRUE(f2);
+  EXPECT_EQ("{v:1$v}[ ]{v:2$v}[ ]{f:3$f}", SummarizeParsedFormat(*f2));
+}
+
 TEST_F(ParsedFormatTest, SimpleUncheckedIgnoredArgs) {
   EXPECT_FALSE((ParsedFormat<'d', 's'>::New("ABC")));
   EXPECT_FALSE((ParsedFormat<'d', 's'>::New("%dABC")));
@@ -535,6 +769,18 @@ TEST_F(ParsedFormatTest, SimpleUncheckedIgnoredArgs) {
   EXPECT_EQ("[ABC]{2$s:2$s}", SummarizeParsedFormat(*f));
 }
 
+TEST_F(ParsedFormatTest, SimpleUncheckedIgnoredArgsWithV) {
+  EXPECT_FALSE((ParsedFormat<'v', 'v'>::New("ABC")));
+  EXPECT_FALSE((ParsedFormat<'v', 'v'>::New("%vABC")));
+  EXPECT_FALSE((ParsedFormat<'v', 's'>::New("ABC%2$s")));
+  auto f = ParsedFormat<'v', 'v'>::NewAllowIgnored("ABC");
+  ASSERT_TRUE(f);
+  EXPECT_EQ("[ABC]", SummarizeParsedFormat(*f));
+  f = ParsedFormat<'v', 'v'>::NewAllowIgnored("%vABC");
+  ASSERT_TRUE(f);
+  EXPECT_EQ("{v:1$v}[ABC]", SummarizeParsedFormat(*f));
+}
+
 TEST_F(ParsedFormatTest, SimpleUncheckedUnsupported) {
   EXPECT_FALSE(ParsedFormat<'d'>::New("%1$d %1$x"));
   EXPECT_FALSE(ParsedFormat<'x'>::New("%1$d %1$x"));
@@ -549,6 +795,15 @@ TEST_F(ParsedFormatTest, SimpleUncheckedIncorrect) {
   EXPECT_FALSE((ParsedFormat<'s', 'd', 'g'>::New(format)));
 }
 
+TEST_F(ParsedFormatTest, SimpleUncheckedIncorrectWithV) {
+  EXPECT_FALSE(ParsedFormat<'v'>::New(""));
+
+  EXPECT_FALSE(ParsedFormat<'v'>::New("ABC%vDEF%v"));
+
+  std::string format = "%vFFF%vZZZ%f";
+  EXPECT_FALSE((ParsedFormat<'v', 'v', 'g'>::New(format)));
+}
+
 #if defined(__cpp_nontype_template_parameter_auto)
 
 template <auto T>
@@ -595,6 +850,23 @@ TEST_F(ParsedFormatTest, ExtendedTyping) {
                          's'>::New("%s%s");
   ASSERT_TRUE(v4);
 }
+
+TEST_F(ParsedFormatTest, ExtendedTypingWithV) {
+  EXPECT_FALSE(ParsedFormat<FormatConversionCharSet::v>::New(""));
+  ASSERT_TRUE(ParsedFormat<absl::FormatConversionCharSet::v>::New("%v"));
+  auto v1 = ParsedFormat<'v', absl::FormatConversionCharSet::v>::New("%v%v");
+  ASSERT_TRUE(v1);
+  auto v2 = ParsedFormat<absl::FormatConversionCharSet::v, 'v'>::New("%v%v");
+  ASSERT_TRUE(v2);
+  auto v3 = ParsedFormat<absl::FormatConversionCharSet::v |
+                             absl::FormatConversionCharSet::v,
+                         'v'>::New("%v%v");
+  ASSERT_TRUE(v3);
+  auto v4 = ParsedFormat<absl::FormatConversionCharSet::v |
+                             absl::FormatConversionCharSet::v,
+                         'v'>::New("%v%v");
+  ASSERT_TRUE(v4);
+}
 #endif
 
 TEST_F(ParsedFormatTest, UncheckedCorrect) {
@@ -638,6 +910,28 @@ TEST_F(ParsedFormatTest, UncheckedCorrect) {
             SummarizeParsedFormat(*dollar));
 }
 
+TEST_F(ParsedFormatTest, UncheckedCorrectWithV) {
+  auto f =
+      ExtendedParsedFormat<absl::FormatConversionCharSet::v>::New("ABC%vDEF");
+  ASSERT_TRUE(f);
+  EXPECT_EQ("[ABC]{v:1$v}[DEF]", SummarizeParsedFormat(*f));
+
+  std::string format = "%vFFF%vZZZ%f";
+  auto f2 = ExtendedParsedFormat<
+      absl::FormatConversionCharSet::v, absl::FormatConversionCharSet::v,
+      absl::FormatConversionCharSet::kFloating>::New(format);
+
+  ASSERT_TRUE(f2);
+  EXPECT_EQ("{v:1$v}[FFF]{v:2$v}[ZZZ]{f:3$f}", SummarizeParsedFormat(*f2));
+
+  f2 = ExtendedParsedFormat<
+      absl::FormatConversionCharSet::v, absl::FormatConversionCharSet::v,
+      absl::FormatConversionCharSet::kFloating>::New("%v %v %f");
+
+  ASSERT_TRUE(f2);
+  EXPECT_EQ("{v:1$v}[ ]{v:2$v}[ ]{f:3$f}", SummarizeParsedFormat(*f2));
+}
+
 TEST_F(ParsedFormatTest, UncheckedIgnoredArgs) {
   EXPECT_FALSE(
       (ExtendedParsedFormat<absl::FormatConversionCharSet::d,
@@ -665,6 +959,28 @@ TEST_F(ParsedFormatTest, UncheckedIgnoredArgs) {
   EXPECT_EQ("[ABC]{2$s:2$s}", SummarizeParsedFormat(*f));
 }
 
+TEST_F(ParsedFormatTest, UncheckedIgnoredArgsWithV) {
+  EXPECT_FALSE(
+      (ExtendedParsedFormat<absl::FormatConversionCharSet::v,
+                            absl::FormatConversionCharSet::v>::New("ABC")));
+  EXPECT_FALSE(
+      (ExtendedParsedFormat<absl::FormatConversionCharSet::v,
+                            absl::FormatConversionCharSet::v>::New("%vABC")));
+  EXPECT_FALSE((ExtendedParsedFormat<absl::FormatConversionCharSet::v,
+                                     absl::FormatConversionCharSet::s>::
+                    New("ABC%2$s")));
+  auto f = ExtendedParsedFormat<
+      absl::FormatConversionCharSet::v,
+      absl::FormatConversionCharSet::v>::NewAllowIgnored("ABC");
+  ASSERT_TRUE(f);
+  EXPECT_EQ("[ABC]", SummarizeParsedFormat(*f));
+  f = ExtendedParsedFormat<
+      absl::FormatConversionCharSet::v,
+      absl::FormatConversionCharSet::v>::NewAllowIgnored("%vABC");
+  ASSERT_TRUE(f);
+  EXPECT_EQ("{v:1$v}[ABC]", SummarizeParsedFormat(*f));
+}
+
 TEST_F(ParsedFormatTest, UncheckedMultipleTypes) {
   auto dx =
       ExtendedParsedFormat<absl::FormatConversionCharSet::d |
@@ -691,12 +1007,35 @@ TEST_F(ParsedFormatTest, UncheckedIncorrect) {
                             absl::FormatConversionCharSet::g>::New(format)));
 }
 
+TEST_F(ParsedFormatTest, UncheckedIncorrectWithV) {
+  EXPECT_FALSE(ExtendedParsedFormat<absl::FormatConversionCharSet::v>::New(""));
+
+  EXPECT_FALSE(ExtendedParsedFormat<absl::FormatConversionCharSet::v>::New(
+      "ABC%vDEF%v"));
+
+  std::string format = "%vFFF%vZZZ%f";
+  EXPECT_FALSE(
+      (ExtendedParsedFormat<absl::FormatConversionCharSet::v,
+                            absl::FormatConversionCharSet::g>::New(format)));
+}
+
 TEST_F(ParsedFormatTest, RegressionMixPositional) {
   EXPECT_FALSE(
       (ExtendedParsedFormat<absl::FormatConversionCharSet::d,
                             absl::FormatConversionCharSet::o>::New("%1$d %o")));
 }
 
+TEST_F(ParsedFormatTest, DisallowModifiersWithV) {
+  auto f = ParsedFormat<'v'>::New("ABC%80vDEF");
+  EXPECT_EQ(f, nullptr);
+
+  f = ParsedFormat<'v'>::New("ABC%0vDEF");
+  EXPECT_EQ(f, nullptr);
+
+  f = ParsedFormat<'v'>::New("ABC%.1vDEF");
+  EXPECT_EQ(f, nullptr);
+}
+
 using FormatWrapperTest = ::testing::Test;
 
 // Plain wrapper for StrFormat.
@@ -710,20 +1049,33 @@ TEST_F(FormatWrapperTest, ConstexprStringFormat) {
   EXPECT_EQ(WrappedFormat("%s there", "hello"), "hello there");
 }
 
+TEST_F(FormatWrapperTest, ConstexprStringFormatWithV) {
+  std::string hello = "hello";
+  EXPECT_EQ(WrappedFormat("%v there", hello), "hello there");
+}
+
 TEST_F(FormatWrapperTest, ParsedFormat) {
   ParsedFormat<'s'> format("%s there");
   EXPECT_EQ(WrappedFormat(format, "hello"), "hello there");
 }
 
+TEST_F(FormatWrapperTest, ParsedFormatWithV) {
+  std::string hello = "hello";
+  ParsedFormat<'v'> format("%v there");
+  EXPECT_EQ(WrappedFormat(format, hello), "hello there");
+}
+
 }  // namespace
 ABSL_NAMESPACE_END
 }  // namespace absl
 
+namespace {
 using FormatExtensionTest = ::testing::Test;
 
 struct Point {
   friend absl::FormatConvertResult<absl::FormatConversionCharSet::kString |
-                                   absl::FormatConversionCharSet::kIntegral>
+                                   absl::FormatConversionCharSet::kIntegral |
+                                   absl::FormatConversionCharSet::v>
   AbslFormatConvert(const Point& p, const absl::FormatConversionSpec& spec,
                     absl::FormatSink* s) {
     if (spec.conversion_char() == absl::FormatConversionChar::s) {
@@ -742,6 +1094,7 @@ TEST_F(FormatExtensionTest, AbslFormatConvertExample) {
   Point p;
   EXPECT_EQ(absl::StrFormat("a %s z", p), "a x=10 y=20 z");
   EXPECT_EQ(absl::StrFormat("a %d z", p), "a 10,20 z");
+  EXPECT_EQ(absl::StrFormat("a %v z", p), "a 10,20 z");
 
   // Typed formatting will fail to compile an invalid format.
   // StrFormat("%f", p);  // Does not compile.
@@ -751,6 +1104,39 @@ TEST_F(FormatExtensionTest, AbslFormatConvertExample) {
   EXPECT_FALSE(absl::FormatUntyped(&actual, f1, {absl::FormatArg(p)}));
 }
 
+struct PointStringify {
+  template <typename FormatSink>
+  friend void AbslStringify(FormatSink& sink, const PointStringify& p) {
+    sink.Append(absl::StrCat("(", p.x, ", ", p.y, ")"));
+  }
+
+  double x = 10.0;
+  double y = 20.0;
+};
+
+TEST_F(FormatExtensionTest, AbslStringifyExample) {
+  PointStringify p;
+  EXPECT_EQ(absl::StrFormat("a %v z", p), "a (10, 20) z");
+}
+
+struct PointStringifyUsingFormat {
+  template <typename FormatSink>
+  friend void AbslStringify(FormatSink& sink,
+                            const PointStringifyUsingFormat& p) {
+    absl::Format(&sink, "(%g, %g)", p.x, p.y);
+  }
+
+  double x = 10.0;
+  double y = 20.0;
+};
+
+TEST_F(FormatExtensionTest, AbslStringifyExampleUsingFormat) {
+  PointStringifyUsingFormat p;
+  EXPECT_EQ(absl::StrFormat("a %v z", p), "a (10, 20) z");
+}
+
+}  // namespace
+
 // Some codegen thunks that we can use to easily dump the generated assembly for
 // different StrFormat calls.
 
diff --git a/third_party/abseil-cpp/absl/strings/str_join.h b/third_party/abseil-cpp/absl/strings/str_join.h
index 33534536cf..ee5ae7efdf 100644
--- a/third_party/abseil-cpp/absl/strings/str_join.h
+++ b/third_party/abseil-cpp/absl/strings/str_join.h
@@ -72,21 +72,15 @@ ABSL_NAMESPACE_BEGIN
 // functions. You may provide your own Formatter to enable `absl::StrJoin()` to
 // work with arbitrary types.
 //
-// The following is an example of a custom Formatter that simply uses
-// `std::to_string()` to format an integer as a std::string.
-//
-//   struct MyFormatter {
-//     void operator()(std::string* out, int i) const {
-//       out->append(std::to_string(i));
-//     }
-//   };
-//
-// You would use the above formatter by passing an instance of it as the final
-// argument to `absl::StrJoin()`:
-//
-//   std::vector<int> v = {1, 2, 3, 4};
-//   std::string s = absl::StrJoin(v, "-", MyFormatter());
-//   EXPECT_EQ("1-2-3-4", s);
+// The following is an example of a custom Formatter that uses
+// `absl::FormatDuration` to join a list of `absl::Duration`s.
+//
+//   std::vector<absl::Duration> v = {absl::Seconds(1), absl::Milliseconds(10)};
+//   std::string s =
+//       absl::StrJoin(v, ", ", [](std::string* out, absl::Duration dur) {
+//         absl::StrAppend(out, absl::FormatDuration(dur));
+//       });
+//   EXPECT_EQ("1s, 10ms", s);
 //
 // The following standard formatters are provided within this file:
 //
diff --git a/third_party/abseil-cpp/absl/strings/str_join_test.cc b/third_party/abseil-cpp/absl/strings/str_join_test.cc
index 2be6256e43..c986e863b6 100644
--- a/third_party/abseil-cpp/absl/strings/str_join_test.cc
+++ b/third_party/abseil-cpp/absl/strings/str_join_test.cc
@@ -21,6 +21,7 @@
 #include <cstdio>
 #include <functional>
 #include <initializer_list>
+#include <iterator>
 #include <map>
 #include <memory>
 #include <ostream>
@@ -33,6 +34,7 @@
 #include "absl/memory/memory.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_split.h"
+#include "absl/strings/string_view.h"
 
 namespace {
 
@@ -471,4 +473,136 @@ TEST(StrJoin, Tuple) {
                           "-", absl::DereferenceFormatter(TestFormatter())));
 }
 
+// A minimal value type for `StrJoin` inputs.
+// Used to ensure we do not excessively require more a specific type, such as a
+// `string_view`.
+//
+// Anything that can be  `data()` and `size()` is OK.
+class TestValue {
+ public:
+  TestValue(const char* data, size_t size) : data_(data), size_(size) {}
+  const char* data() const { return data_; }
+  size_t size() const { return size_; }
+
+ private:
+  const char* data_;
+  size_t size_;
+};
+
+// A minimal C++20 forward iterator, used to test that we do not impose
+// excessive requirements on StrJoin inputs.
+//
+// The 2 main differences between pre-C++20 LegacyForwardIterator and the
+// C++20 ForwardIterator are:
+// 1. `operator->` is not required in C++20.
+// 2. `operator*` result does not need to be an lvalue (a reference).
+//
+// The `operator->` requirement was removed on page 17 in:
+// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1037r0.pdf
+//
+// See the `[iterator.requirements]` section of the C++ standard.
+//
+// The value type is a template parameter so that we can test the behaviour
+// of `StrJoin` specializations, e.g. the NoFormatter specialization for
+// `string_view`.
+template <typename ValueT>
+class TestIterator {
+ public:
+  using iterator_category = std::forward_iterator_tag;
+  using value_type = ValueT;
+  using pointer = void;
+  using reference = const value_type&;
+  using difference_type = int;
+
+  // `data` must outlive the result.
+  static TestIterator begin(const std::vector<absl::string_view>& data) {
+    return TestIterator(&data, 0);
+  }
+
+  static TestIterator end(const std::vector<absl::string_view>& data) {
+    return TestIterator(nullptr, data.size());
+  }
+
+  bool operator==(const TestIterator& other) const {
+    return pos_ == other.pos_;
+  }
+  bool operator!=(const TestIterator& other) const {
+    return pos_ != other.pos_;
+  }
+
+  // This deliberately returns a `prvalue`.
+  // The requirement to return a reference was removed in C++20.
+  value_type operator*() const {
+    return ValueT((*data_)[pos_].data(), (*data_)[pos_].size());
+  }
+
+  // `operator->()` is deliberately omitted.
+  // The requirement to provide it was removed in C++20.
+
+  TestIterator& operator++() {
+    ++pos_;
+    return *this;
+  }
+
+  TestIterator operator++(int) {
+    TestIterator result = *this;
+    ++(*this);
+    return result;
+  }
+
+  TestIterator& operator--() {
+    --pos_;
+    return *this;
+  }
+
+  TestIterator operator--(int) {
+    TestIterator result = *this;
+    --(*this);
+    return result;
+  }
+
+ private:
+  TestIterator(const std::vector<absl::string_view>* data, size_t pos)
+      : data_(data), pos_(pos) {}
+
+  const std::vector<absl::string_view>* data_;
+  size_t pos_;
+};
+
+template <typename ValueT>
+class TestIteratorRange {
+ public:
+  // `data` must be non-null and must outlive the result.
+  explicit TestIteratorRange(const std::vector<absl::string_view>& data)
+      : begin_(TestIterator<ValueT>::begin(data)),
+        end_(TestIterator<ValueT>::end(data)) {}
+
+  const TestIterator<ValueT>& begin() const { return begin_; }
+  const TestIterator<ValueT>& end() const { return end_; }
+
+ private:
+  TestIterator<ValueT> begin_;
+  TestIterator<ValueT> end_;
+};
+
+TEST(StrJoin, TestIteratorRequirementsNoFormatter) {
+  const std::vector<absl::string_view> a = {"a", "b", "c"};
+
+  // When the value type is string-like (`std::string` or `string_view`),
+  // the NoFormatter template specialization is used internally.
+  EXPECT_EQ("a-b-c",
+            absl::StrJoin(TestIteratorRange<absl::string_view>(a), "-"));
+}
+
+TEST(StrJoin, TestIteratorRequirementsCustomFormatter) {
+  const std::vector<absl::string_view> a = {"a", "b", "c"};
+  EXPECT_EQ("a-b-c",
+            absl::StrJoin(TestIteratorRange<TestValue>(a), "-",
+                          [](std::string* out, const TestValue& value) {
+                            absl::StrAppend(
+                                out,
+                                absl::string_view(value.data(), value.size()));
+                          }));
+}
+
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/strings/str_split.h b/third_party/abseil-cpp/absl/strings/str_split.h
index bfbca422a8..7bbb68a343 100644
--- a/third_party/abseil-cpp/absl/strings/str_split.h
+++ b/third_party/abseil-cpp/absl/strings/str_split.h
@@ -461,8 +461,7 @@ using EnableSplitIfString =
 // first two split strings become the `std::pair` `.first` and `.second`
 // members, respectively. The remaining split substrings are discarded. If there
 // are less than two split substrings, the empty string is used for the
-// corresponding
-// `std::pair` member.
+// corresponding `std::pair` member.
 //
 // Example:
 //
diff --git a/third_party/abseil-cpp/absl/strings/string_view.cc b/third_party/abseil-cpp/absl/strings/string_view.cc
index d596e08cde..e2261625f9 100644
--- a/third_party/abseil-cpp/absl/strings/string_view.cc
+++ b/third_party/abseil-cpp/absl/strings/string_view.cc
@@ -32,7 +32,7 @@ void WritePadding(std::ostream& o, size_t pad) {
   memset(fill_buf, o.fill(), sizeof(fill_buf));
   while (pad) {
     size_t n = std::min(pad, sizeof(fill_buf));
-    o.write(fill_buf, n);
+    o.write(fill_buf, static_cast<std::streamsize>(n));
     pad -= n;
   }
 }
@@ -63,7 +63,7 @@ std::ostream& operator<<(std::ostream& o, string_view piece) {
     size_t lpad = 0;
     size_t rpad = 0;
     if (static_cast<size_t>(o.width()) > piece.size()) {
-      size_t pad = o.width() - piece.size();
+      size_t pad = static_cast<size_t>(o.width()) - piece.size();
       if ((o.flags() & o.adjustfield) == o.left) {
         rpad = pad;
       } else {
@@ -71,7 +71,7 @@ std::ostream& operator<<(std::ostream& o, string_view piece) {
       }
     }
     if (lpad) WritePadding(o, lpad);
-    o.write(piece.data(), piece.size());
+    o.write(piece.data(), static_cast<std::streamsize>(piece.size()));
     if (rpad) WritePadding(o, rpad);
     o.width(0);
   }
@@ -86,7 +86,7 @@ string_view::size_type string_view::find(string_view s,
   }
   const char* result =
       strings_internal::memmatch(ptr_ + pos, length_ - pos, s.ptr_, s.length_);
-  return result ? result - ptr_ : npos;
+  return result ? static_cast<size_type>(result - ptr_) : npos;
 }
 
 string_view::size_type string_view::find(char c, size_type pos) const noexcept {
@@ -95,7 +95,7 @@ string_view::size_type string_view::find(char c, size_type pos) const noexcept {
   }
   const char* result =
       static_cast<const char*>(memchr(ptr_ + pos, c, length_ - pos));
-  return result != nullptr ? result - ptr_ : npos;
+  return result != nullptr ? static_cast<size_type>(result - ptr_) : npos;
 }
 
 string_view::size_type string_view::rfind(string_view s,
@@ -104,7 +104,7 @@ string_view::size_type string_view::rfind(string_view s,
   if (s.empty()) return std::min(length_, pos);
   const char* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_;
   const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_);
-  return result != last ? result - ptr_ : npos;
+  return result != last ? static_cast<size_type>(result - ptr_) : npos;
 }
 
 // Search range is [0..pos] inclusive.  If pos == npos, search everything.
@@ -207,22 +207,11 @@ string_view::size_type string_view::find_last_not_of(
   return npos;
 }
 
-// MSVC has non-standard behavior that implicitly creates definitions for static
-// const members. These implicit definitions conflict with explicit out-of-class
-// member definitions that are required by the C++ standard, resulting in
-// LNK1169 "multiply defined" errors at link time. __declspec(selectany) asks
-// MSVC to choose only one definition for the symbol it decorates. See details
-// at https://msdn.microsoft.com/en-us/library/34h23df8(v=vs.100).aspx
-#ifdef _MSC_VER
-#define ABSL_STRING_VIEW_SELECTANY __declspec(selectany)
-#else
-#define ABSL_STRING_VIEW_SELECTANY
-#endif
 
-ABSL_STRING_VIEW_SELECTANY
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 constexpr string_view::size_type string_view::npos;
-ABSL_STRING_VIEW_SELECTANY
 constexpr string_view::size_type string_view::kMaxSize;
+#endif
 
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/strings/string_view.h b/third_party/abseil-cpp/absl/strings/string_view.h
index a4c9a6526c..eae11b2ab6 100644
--- a/third_party/abseil-cpp/absl/strings/string_view.h
+++ b/third_party/abseil-cpp/absl/strings/string_view.h
@@ -55,19 +55,14 @@ ABSL_NAMESPACE_END
 
 #else  // ABSL_USES_STD_STRING_VIEW
 
-#if ABSL_HAVE_BUILTIN(__builtin_memcmp) || \
-    (defined(__GNUC__) && !defined(__clang__))
+#if ABSL_HAVE_BUILTIN(__builtin_memcmp) ||        \
+    (defined(__GNUC__) && !defined(__clang__)) || \
+    (defined(_MSC_VER) && _MSC_VER >= 1928)
 #define ABSL_INTERNAL_STRING_VIEW_MEMCMP __builtin_memcmp
 #else  // ABSL_HAVE_BUILTIN(__builtin_memcmp)
 #define ABSL_INTERNAL_STRING_VIEW_MEMCMP memcmp
 #endif  // ABSL_HAVE_BUILTIN(__builtin_memcmp)
 
-#if defined(__cplusplus) && __cplusplus >= 201402L
-#define ABSL_INTERNAL_STRING_VIEW_CXX14_CONSTEXPR constexpr
-#else
-#define ABSL_INTERNAL_STRING_VIEW_CXX14_CONSTEXPR
-#endif
-
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
@@ -340,7 +335,7 @@ class string_view {
   //
   // Removes the first `n` characters from the `string_view`. Note that the
   // underlying string is not changed, only the view.
-  ABSL_INTERNAL_STRING_VIEW_CXX14_CONSTEXPR void remove_prefix(size_type n) {
+  constexpr void remove_prefix(size_type n) {
     ABSL_HARDENING_ASSERT(n <= length_);
     ptr_ += n;
     length_ -= n;
@@ -350,7 +345,7 @@ class string_view {
   //
   // Removes the last `n` characters from the `string_view`. Note that the
   // underlying string is not changed, only the view.
-  ABSL_INTERNAL_STRING_VIEW_CXX14_CONSTEXPR void remove_suffix(size_type n) {
+  constexpr void remove_suffix(size_type n) {
     ABSL_HARDENING_ASSERT(n <= length_);
     length_ -= n;
   }
@@ -358,7 +353,7 @@ class string_view {
   // string_view::swap()
   //
   // Swaps this `string_view` with another `string_view`.
-  ABSL_INTERNAL_STRING_VIEW_CXX14_CONSTEXPR void swap(string_view& s) noexcept {
+  constexpr void swap(string_view& s) noexcept {
     auto t = *this;
     *this = s;
     s = t;
@@ -677,7 +672,6 @@ std::ostream& operator<<(std::ostream& o, string_view piece);
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#undef ABSL_INTERNAL_STRING_VIEW_CXX14_CONSTEXPR
 #undef ABSL_INTERNAL_STRING_VIEW_MEMCMP
 
 #endif  // ABSL_USES_STD_STRING_VIEW
diff --git a/third_party/abseil-cpp/absl/strings/string_view_test.cc b/third_party/abseil-cpp/absl/strings/string_view_test.cc
index 2c13dd1c14..990c211a8e 100644
--- a/third_party/abseil-cpp/absl/strings/string_view_test.cc
+++ b/third_party/abseil-cpp/absl/strings/string_view_test.cc
@@ -82,7 +82,7 @@ TEST(StringViewTest, Ctor) {
     // Null.
     absl::string_view s10;
     EXPECT_TRUE(s10.data() == nullptr);
-    EXPECT_EQ(0, s10.length());
+    EXPECT_EQ(0u, s10.length());
   }
 
   {
@@ -90,17 +90,17 @@ TEST(StringViewTest, Ctor) {
     const char* hello = "hello";
     absl::string_view s20(hello);
     EXPECT_TRUE(s20.data() == hello);
-    EXPECT_EQ(5, s20.length());
+    EXPECT_EQ(5u, s20.length());
 
     // const char* with length.
     absl::string_view s21(hello, 4);
     EXPECT_TRUE(s21.data() == hello);
-    EXPECT_EQ(4, s21.length());
+    EXPECT_EQ(4u, s21.length());
 
     // Not recommended, but valid C++
     absl::string_view s22(hello, 6);
     EXPECT_TRUE(s22.data() == hello);
-    EXPECT_EQ(6, s22.length());
+    EXPECT_EQ(6u, s22.length());
   }
 
   {
@@ -108,7 +108,7 @@ TEST(StringViewTest, Ctor) {
     std::string hola = "hola";
     absl::string_view s30(hola);
     EXPECT_TRUE(s30.data() == hola.data());
-    EXPECT_EQ(4, s30.length());
+    EXPECT_EQ(4u, s30.length());
 
     // std::string with embedded '\0'.
     hola.push_back('\0');
@@ -116,7 +116,7 @@ TEST(StringViewTest, Ctor) {
     hola.push_back('\0');
     absl::string_view s31(hola);
     EXPECT_TRUE(s31.data() == hola.data());
-    EXPECT_EQ(8, s31.length());
+    EXPECT_EQ(8u, s31.length());
   }
 
   {
@@ -165,7 +165,7 @@ TEST(StringViewTest, STLComparator) {
   map.insert(std::make_pair(p1, 0));
   map.insert(std::make_pair(p2, 1));
   map.insert(std::make_pair(p3, 2));
-  EXPECT_EQ(map.size(), 3);
+  EXPECT_EQ(map.size(), 3u);
 
   TestMap::const_iterator iter = map.begin();
   EXPECT_EQ(iter->second, 1);
@@ -183,7 +183,7 @@ TEST(StringViewTest, STLComparator) {
   EXPECT_TRUE(new_iter != map.end());
 
   map.erase(new_iter);
-  EXPECT_EQ(map.size(), 2);
+  EXPECT_EQ(map.size(), 2u);
 
   iter = map.begin();
   EXPECT_EQ(iter->second, 2);
@@ -261,11 +261,11 @@ TEST(StringViewTest, ComparisonOperators) {
 
 TEST(StringViewTest, ComparisonOperatorsByCharacterPosition) {
   std::string x;
-  for (int i = 0; i < 256; i++) {
+  for (size_t i = 0; i < 256; i++) {
     x += 'a';
     std::string y = x;
     COMPARE(true, ==, x, y);
-    for (int j = 0; j < i; j++) {
+    for (size_t j = 0; j < i; j++) {
       std::string z = x;
       z[j] = 'b';       // Differs in position 'j'
       COMPARE(false, ==, x, z);
@@ -341,12 +341,12 @@ TEST(StringViewTest, STL1) {
   EXPECT_EQ(*(c.rend() - 1), 'x');
   EXPECT_TRUE(a.rbegin() + 26 == a.rend());
 
-  EXPECT_EQ(a.size(), 26);
-  EXPECT_EQ(b.size(), 3);
-  EXPECT_EQ(c.size(), 3);
-  EXPECT_EQ(d.size(), 6);
-  EXPECT_EQ(e.size(), 0);
-  EXPECT_EQ(f.size(), 7);
+  EXPECT_EQ(a.size(), 26u);
+  EXPECT_EQ(b.size(), 3u);
+  EXPECT_EQ(c.size(), 3u);
+  EXPECT_EQ(d.size(), 6u);
+  EXPECT_EQ(e.size(), 0u);
+  EXPECT_EQ(f.size(), 7u);
 
   EXPECT_TRUE(!d.empty());
   EXPECT_TRUE(d.begin() != d.end());
@@ -356,17 +356,17 @@ TEST(StringViewTest, STL1) {
   EXPECT_TRUE(e.begin() == e.end());
 
   char buf[4] = { '%', '%', '%', '%' };
-  EXPECT_EQ(a.copy(buf, 4), 4);
+  EXPECT_EQ(a.copy(buf, 4), 4u);
   EXPECT_EQ(buf[0], a[0]);
   EXPECT_EQ(buf[1], a[1]);
   EXPECT_EQ(buf[2], a[2]);
   EXPECT_EQ(buf[3], a[3]);
-  EXPECT_EQ(a.copy(buf, 3, 7), 3);
+  EXPECT_EQ(a.copy(buf, 3, 7), 3u);
   EXPECT_EQ(buf[0], a[7]);
   EXPECT_EQ(buf[1], a[8]);
   EXPECT_EQ(buf[2], a[9]);
   EXPECT_EQ(buf[3], a[3]);
-  EXPECT_EQ(c.copy(buf, 99), 3);
+  EXPECT_EQ(c.copy(buf, 99), 3u);
   EXPECT_EQ(buf[0], c[0]);
   EXPECT_EQ(buf[1], c[1]);
   EXPECT_EQ(buf[2], c[2]);
@@ -393,22 +393,22 @@ TEST(StringViewTest, STL2) {
       7);
 
   d = absl::string_view();
-  EXPECT_EQ(d.size(), 0);
+  EXPECT_EQ(d.size(), 0u);
   EXPECT_TRUE(d.empty());
   EXPECT_TRUE(d.data() == nullptr);
   EXPECT_TRUE(d.begin() == d.end());
 
-  EXPECT_EQ(a.find(b), 0);
+  EXPECT_EQ(a.find(b), 0u);
   EXPECT_EQ(a.find(b, 1), absl::string_view::npos);
-  EXPECT_EQ(a.find(c), 23);
-  EXPECT_EQ(a.find(c, 9), 23);
+  EXPECT_EQ(a.find(c), 23u);
+  EXPECT_EQ(a.find(c, 9), 23u);
   EXPECT_EQ(a.find(c, absl::string_view::npos), absl::string_view::npos);
   EXPECT_EQ(b.find(c), absl::string_view::npos);
   EXPECT_EQ(b.find(c, absl::string_view::npos), absl::string_view::npos);
-  EXPECT_EQ(a.find(d), 0);
-  EXPECT_EQ(a.find(e), 0);
-  EXPECT_EQ(a.find(d, 12), 12);
-  EXPECT_EQ(a.find(e, 17), 17);
+  EXPECT_EQ(a.find(d), 0u);
+  EXPECT_EQ(a.find(e), 0u);
+  EXPECT_EQ(a.find(d, 12), 12u);
+  EXPECT_EQ(a.find(e, 17), 17u);
   absl::string_view g("xx not found bb");
   EXPECT_EQ(a.find(g), absl::string_view::npos);
   // empty string nonsense
@@ -427,17 +427,17 @@ TEST(StringViewTest, STL2) {
   EXPECT_EQ(e.find(d, 4), std::string().find(std::string(), 4));
   EXPECT_EQ(e.find(e, 4), std::string().find(std::string(), 4));
 
-  EXPECT_EQ(a.find('a'), 0);
-  EXPECT_EQ(a.find('c'), 2);
-  EXPECT_EQ(a.find('z'), 25);
+  EXPECT_EQ(a.find('a'), 0u);
+  EXPECT_EQ(a.find('c'), 2u);
+  EXPECT_EQ(a.find('z'), 25u);
   EXPECT_EQ(a.find('$'), absl::string_view::npos);
   EXPECT_EQ(a.find('\0'), absl::string_view::npos);
-  EXPECT_EQ(f.find('\0'), 3);
-  EXPECT_EQ(f.find('3'), 2);
-  EXPECT_EQ(f.find('5'), 5);
-  EXPECT_EQ(g.find('o'), 4);
-  EXPECT_EQ(g.find('o', 4), 4);
-  EXPECT_EQ(g.find('o', 5), 8);
+  EXPECT_EQ(f.find('\0'), 3u);
+  EXPECT_EQ(f.find('3'), 2u);
+  EXPECT_EQ(f.find('5'), 5u);
+  EXPECT_EQ(g.find('o'), 4u);
+  EXPECT_EQ(g.find('o', 4), 4u);
+  EXPECT_EQ(g.find('o', 5), 8u);
   EXPECT_EQ(a.find('b', 5), absl::string_view::npos);
   // empty string nonsense
   EXPECT_EQ(d.find('\0'), absl::string_view::npos);
@@ -449,8 +449,8 @@ TEST(StringViewTest, STL2) {
   EXPECT_EQ(d.find('x', 4), absl::string_view::npos);
   EXPECT_EQ(e.find('x', 7), absl::string_view::npos);
 
-  EXPECT_EQ(a.find(b.data(), 1, 0), 1);
-  EXPECT_EQ(a.find(c.data(), 9, 0), 9);
+  EXPECT_EQ(a.find(b.data(), 1, 0), 1u);
+  EXPECT_EQ(a.find(c.data(), 9, 0), 9u);
   EXPECT_EQ(a.find(c.data(), absl::string_view::npos, 0),
             absl::string_view::npos);
   EXPECT_EQ(b.find(c.data(), absl::string_view::npos, 0),
@@ -460,16 +460,16 @@ TEST(StringViewTest, STL2) {
   EXPECT_EQ(e.find(b.data(), 7, 0), absl::string_view::npos);
 
   EXPECT_EQ(a.find(b.data(), 1), absl::string_view::npos);
-  EXPECT_EQ(a.find(c.data(), 9), 23);
+  EXPECT_EQ(a.find(c.data(), 9), 23u);
   EXPECT_EQ(a.find(c.data(), absl::string_view::npos), absl::string_view::npos);
   EXPECT_EQ(b.find(c.data(), absl::string_view::npos), absl::string_view::npos);
   // empty string nonsense
   EXPECT_EQ(d.find(b.data(), 4), absl::string_view::npos);
   EXPECT_EQ(e.find(b.data(), 7), absl::string_view::npos);
 
-  EXPECT_EQ(a.rfind(b), 0);
-  EXPECT_EQ(a.rfind(b, 1), 0);
-  EXPECT_EQ(a.rfind(c), 23);
+  EXPECT_EQ(a.rfind(b), 0u);
+  EXPECT_EQ(a.rfind(b, 1), 0u);
+  EXPECT_EQ(a.rfind(c), 23u);
   EXPECT_EQ(a.rfind(c, 22), absl::string_view::npos);
   EXPECT_EQ(a.rfind(c, 1), absl::string_view::npos);
   EXPECT_EQ(a.rfind(c, 0), absl::string_view::npos);
@@ -477,8 +477,8 @@ TEST(StringViewTest, STL2) {
   EXPECT_EQ(b.rfind(c, 0), absl::string_view::npos);
   EXPECT_EQ(a.rfind(d), std::string(a).rfind(std::string()));
   EXPECT_EQ(a.rfind(e), std::string(a).rfind(std::string()));
-  EXPECT_EQ(a.rfind(d, 12), 12);
-  EXPECT_EQ(a.rfind(e, 17), 17);
+  EXPECT_EQ(a.rfind(d, 12), 12u);
+  EXPECT_EQ(a.rfind(e, 17), 17u);
   EXPECT_EQ(a.rfind(g), absl::string_view::npos);
   EXPECT_EQ(d.rfind(b), absl::string_view::npos);
   EXPECT_EQ(e.rfind(b), absl::string_view::npos);
@@ -494,28 +494,28 @@ TEST(StringViewTest, STL2) {
   EXPECT_EQ(d.rfind(e), std::string().rfind(std::string()));
   EXPECT_EQ(e.rfind(e), std::string().rfind(std::string()));
 
-  EXPECT_EQ(g.rfind('o'), 8);
+  EXPECT_EQ(g.rfind('o'), 8u);
   EXPECT_EQ(g.rfind('q'), absl::string_view::npos);
-  EXPECT_EQ(g.rfind('o', 8), 8);
-  EXPECT_EQ(g.rfind('o', 7), 4);
+  EXPECT_EQ(g.rfind('o', 8), 8u);
+  EXPECT_EQ(g.rfind('o', 7), 4u);
   EXPECT_EQ(g.rfind('o', 3), absl::string_view::npos);
-  EXPECT_EQ(f.rfind('\0'), 3);
-  EXPECT_EQ(f.rfind('\0', 12), 3);
-  EXPECT_EQ(f.rfind('3'), 2);
-  EXPECT_EQ(f.rfind('5'), 5);
+  EXPECT_EQ(f.rfind('\0'), 3u);
+  EXPECT_EQ(f.rfind('\0', 12), 3u);
+  EXPECT_EQ(f.rfind('3'), 2u);
+  EXPECT_EQ(f.rfind('5'), 5u);
   // empty string nonsense
   EXPECT_EQ(d.rfind('o'), absl::string_view::npos);
   EXPECT_EQ(e.rfind('o'), absl::string_view::npos);
   EXPECT_EQ(d.rfind('o', 4), absl::string_view::npos);
   EXPECT_EQ(e.rfind('o', 7), absl::string_view::npos);
 
-  EXPECT_EQ(a.rfind(b.data(), 1, 0), 1);
-  EXPECT_EQ(a.rfind(c.data(), 22, 0), 22);
-  EXPECT_EQ(a.rfind(c.data(), 1, 0), 1);
-  EXPECT_EQ(a.rfind(c.data(), 0, 0), 0);
-  EXPECT_EQ(b.rfind(c.data(), 0, 0), 0);
-  EXPECT_EQ(d.rfind(b.data(), 4, 0), 0);
-  EXPECT_EQ(e.rfind(b.data(), 7, 0), 0);
+  EXPECT_EQ(a.rfind(b.data(), 1, 0), 1u);
+  EXPECT_EQ(a.rfind(c.data(), 22, 0), 22u);
+  EXPECT_EQ(a.rfind(c.data(), 1, 0), 1u);
+  EXPECT_EQ(a.rfind(c.data(), 0, 0), 0u);
+  EXPECT_EQ(b.rfind(c.data(), 0, 0), 0u);
+  EXPECT_EQ(d.rfind(b.data(), 4, 0), 0u);
+  EXPECT_EQ(e.rfind(b.data(), 7, 0), 0u);
 }
 
 // Continued from STL2
@@ -533,18 +533,18 @@ TEST(StringViewTest, STL2FindFirst) {
   absl::string_view g("xx not found bb");
 
   d = absl::string_view();
-  EXPECT_EQ(a.find_first_of(b), 0);
-  EXPECT_EQ(a.find_first_of(b, 0), 0);
-  EXPECT_EQ(a.find_first_of(b, 1), 1);
-  EXPECT_EQ(a.find_first_of(b, 2), 2);
+  EXPECT_EQ(a.find_first_of(b), 0u);
+  EXPECT_EQ(a.find_first_of(b, 0), 0u);
+  EXPECT_EQ(a.find_first_of(b, 1), 1u);
+  EXPECT_EQ(a.find_first_of(b, 2), 2u);
   EXPECT_EQ(a.find_first_of(b, 3), absl::string_view::npos);
-  EXPECT_EQ(a.find_first_of(c), 23);
-  EXPECT_EQ(a.find_first_of(c, 23), 23);
-  EXPECT_EQ(a.find_first_of(c, 24), 24);
-  EXPECT_EQ(a.find_first_of(c, 25), 25);
+  EXPECT_EQ(a.find_first_of(c), 23u);
+  EXPECT_EQ(a.find_first_of(c, 23), 23u);
+  EXPECT_EQ(a.find_first_of(c, 24), 24u);
+  EXPECT_EQ(a.find_first_of(c, 25), 25u);
   EXPECT_EQ(a.find_first_of(c, 26), absl::string_view::npos);
-  EXPECT_EQ(g.find_first_of(b), 13);
-  EXPECT_EQ(g.find_first_of(c), 0);
+  EXPECT_EQ(g.find_first_of(b), 13u);
+  EXPECT_EQ(g.find_first_of(c), 0u);
   EXPECT_EQ(a.find_first_of(f), absl::string_view::npos);
   EXPECT_EQ(f.find_first_of(a), absl::string_view::npos);
   // empty string nonsense
@@ -557,19 +557,19 @@ TEST(StringViewTest, STL2FindFirst) {
   EXPECT_EQ(d.find_first_of(e), absl::string_view::npos);
   EXPECT_EQ(e.find_first_of(e), absl::string_view::npos);
 
-  EXPECT_EQ(a.find_first_not_of(b), 3);
-  EXPECT_EQ(a.find_first_not_of(c), 0);
+  EXPECT_EQ(a.find_first_not_of(b), 3u);
+  EXPECT_EQ(a.find_first_not_of(c), 0u);
   EXPECT_EQ(b.find_first_not_of(a), absl::string_view::npos);
   EXPECT_EQ(c.find_first_not_of(a), absl::string_view::npos);
-  EXPECT_EQ(f.find_first_not_of(a), 0);
-  EXPECT_EQ(a.find_first_not_of(f), 0);
-  EXPECT_EQ(a.find_first_not_of(d), 0);
-  EXPECT_EQ(a.find_first_not_of(e), 0);
+  EXPECT_EQ(f.find_first_not_of(a), 0u);
+  EXPECT_EQ(a.find_first_not_of(f), 0u);
+  EXPECT_EQ(a.find_first_not_of(d), 0u);
+  EXPECT_EQ(a.find_first_not_of(e), 0u);
   // empty string nonsense
-  EXPECT_EQ(a.find_first_not_of(d), 0);
-  EXPECT_EQ(a.find_first_not_of(e), 0);
-  EXPECT_EQ(a.find_first_not_of(d, 1), 1);
-  EXPECT_EQ(a.find_first_not_of(e, 1), 1);
+  EXPECT_EQ(a.find_first_not_of(d), 0u);
+  EXPECT_EQ(a.find_first_not_of(e), 0u);
+  EXPECT_EQ(a.find_first_not_of(d, 1), 1u);
+  EXPECT_EQ(a.find_first_not_of(e, 1), 1u);
   EXPECT_EQ(a.find_first_not_of(d, a.size() - 1), a.size() - 1);
   EXPECT_EQ(a.find_first_not_of(e, a.size() - 1), a.size() - 1);
   EXPECT_EQ(a.find_first_not_of(d, a.size()), absl::string_view::npos);
@@ -588,11 +588,11 @@ TEST(StringViewTest, STL2FindFirst) {
   absl::string_view h("====");
   EXPECT_EQ(h.find_first_not_of('='), absl::string_view::npos);
   EXPECT_EQ(h.find_first_not_of('=', 3), absl::string_view::npos);
-  EXPECT_EQ(h.find_first_not_of('\0'), 0);
-  EXPECT_EQ(g.find_first_not_of('x'), 2);
-  EXPECT_EQ(f.find_first_not_of('\0'), 0);
-  EXPECT_EQ(f.find_first_not_of('\0', 3), 4);
-  EXPECT_EQ(f.find_first_not_of('\0', 2), 2);
+  EXPECT_EQ(h.find_first_not_of('\0'), 0u);
+  EXPECT_EQ(g.find_first_not_of('x'), 2u);
+  EXPECT_EQ(f.find_first_not_of('\0'), 0u);
+  EXPECT_EQ(f.find_first_not_of('\0', 3), 4u);
+  EXPECT_EQ(f.find_first_not_of('\0', 2), 2u);
   // empty string nonsense
   EXPECT_EQ(d.find_first_not_of('x'), absl::string_view::npos);
   EXPECT_EQ(e.find_first_not_of('x'), absl::string_view::npos);
@@ -618,20 +618,20 @@ TEST(StringViewTest, STL2FindLast) {
 
   d = absl::string_view();
   EXPECT_EQ(h.find_last_of(a), absl::string_view::npos);
-  EXPECT_EQ(g.find_last_of(a), g.size()-1);
-  EXPECT_EQ(a.find_last_of(b), 2);
-  EXPECT_EQ(a.find_last_of(c), a.size()-1);
-  EXPECT_EQ(f.find_last_of(i), 6);
-  EXPECT_EQ(a.find_last_of('a'), 0);
-  EXPECT_EQ(a.find_last_of('b'), 1);
-  EXPECT_EQ(a.find_last_of('z'), 25);
-  EXPECT_EQ(a.find_last_of('a', 5), 0);
-  EXPECT_EQ(a.find_last_of('b', 5), 1);
+  EXPECT_EQ(g.find_last_of(a), g.size() - 1);
+  EXPECT_EQ(a.find_last_of(b), 2u);
+  EXPECT_EQ(a.find_last_of(c), a.size() - 1);
+  EXPECT_EQ(f.find_last_of(i), 6u);
+  EXPECT_EQ(a.find_last_of('a'), 0u);
+  EXPECT_EQ(a.find_last_of('b'), 1u);
+  EXPECT_EQ(a.find_last_of('z'), 25u);
+  EXPECT_EQ(a.find_last_of('a', 5), 0u);
+  EXPECT_EQ(a.find_last_of('b', 5), 1u);
   EXPECT_EQ(a.find_last_of('b', 0), absl::string_view::npos);
-  EXPECT_EQ(a.find_last_of('z', 25), 25);
+  EXPECT_EQ(a.find_last_of('z', 25), 25u);
   EXPECT_EQ(a.find_last_of('z', 24), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_of(i, 5), 5);
-  EXPECT_EQ(f.find_last_of(i, 6), 6);
+  EXPECT_EQ(f.find_last_of(i, 5), 5u);
+  EXPECT_EQ(f.find_last_of(i, 6), 6u);
   EXPECT_EQ(f.find_last_of(a, 4), absl::string_view::npos);
   // empty string nonsense
   EXPECT_EQ(f.find_last_of(d), absl::string_view::npos);
@@ -651,19 +651,19 @@ TEST(StringViewTest, STL2FindLast) {
   EXPECT_EQ(d.find_last_of(f, 4), absl::string_view::npos);
   EXPECT_EQ(e.find_last_of(f, 4), absl::string_view::npos);
 
-  EXPECT_EQ(a.find_last_not_of(b), a.size()-1);
-  EXPECT_EQ(a.find_last_not_of(c), 22);
+  EXPECT_EQ(a.find_last_not_of(b), a.size() - 1);
+  EXPECT_EQ(a.find_last_not_of(c), 22u);
   EXPECT_EQ(b.find_last_not_of(a), absl::string_view::npos);
   EXPECT_EQ(b.find_last_not_of(b), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_not_of(i), 4);
-  EXPECT_EQ(a.find_last_not_of(c, 24), 22);
-  EXPECT_EQ(a.find_last_not_of(b, 3), 3);
+  EXPECT_EQ(f.find_last_not_of(i), 4u);
+  EXPECT_EQ(a.find_last_not_of(c, 24), 22u);
+  EXPECT_EQ(a.find_last_not_of(b, 3), 3u);
   EXPECT_EQ(a.find_last_not_of(b, 2), absl::string_view::npos);
   // empty string nonsense
-  EXPECT_EQ(f.find_last_not_of(d), f.size()-1);
-  EXPECT_EQ(f.find_last_not_of(e), f.size()-1);
-  EXPECT_EQ(f.find_last_not_of(d, 4), 4);
-  EXPECT_EQ(f.find_last_not_of(e, 4), 4);
+  EXPECT_EQ(f.find_last_not_of(d), f.size() - 1);
+  EXPECT_EQ(f.find_last_not_of(e), f.size() - 1);
+  EXPECT_EQ(f.find_last_not_of(d, 4), 4u);
+  EXPECT_EQ(f.find_last_not_of(e, 4), 4u);
   EXPECT_EQ(d.find_last_not_of(d), absl::string_view::npos);
   EXPECT_EQ(d.find_last_not_of(e), absl::string_view::npos);
   EXPECT_EQ(e.find_last_not_of(d), absl::string_view::npos);
@@ -679,10 +679,10 @@ TEST(StringViewTest, STL2FindLast) {
 
   EXPECT_EQ(h.find_last_not_of('x'), h.size() - 1);
   EXPECT_EQ(h.find_last_not_of('='), absl::string_view::npos);
-  EXPECT_EQ(b.find_last_not_of('c'), 1);
-  EXPECT_EQ(h.find_last_not_of('x', 2), 2);
+  EXPECT_EQ(b.find_last_not_of('c'), 1u);
+  EXPECT_EQ(h.find_last_not_of('x', 2), 2u);
   EXPECT_EQ(h.find_last_not_of('=', 2), absl::string_view::npos);
-  EXPECT_EQ(b.find_last_not_of('b', 1), 0);
+  EXPECT_EQ(b.find_last_not_of('b', 1), 0u);
   // empty string nonsense
   EXPECT_EQ(d.find_last_not_of('x'), absl::string_view::npos);
   EXPECT_EQ(e.find_last_not_of('x'), absl::string_view::npos);
@@ -734,7 +734,7 @@ TEST(StringViewTest, TruncSubstr) {
 TEST(StringViewTest, UTF8) {
   std::string utf8 = "\u00E1";
   std::string utf8_twice = utf8 + " " + utf8;
-  int utf8_len = strlen(utf8.data());
+  size_t utf8_len = strlen(utf8.data());
   EXPECT_EQ(utf8_len, absl::string_view(utf8_twice).find_first_of(" "));
   EXPECT_EQ(utf8_len, absl::string_view(utf8_twice).find_first_of(" \t"));
 }
@@ -879,12 +879,12 @@ TEST(StringViewTest, FrontBackEmpty) {
 TEST(StringViewTest, NULLInput) {
   absl::string_view s;
   EXPECT_EQ(s.data(), nullptr);
-  EXPECT_EQ(s.size(), 0);
+  EXPECT_EQ(s.size(), 0u);
 
 #ifdef ABSL_HAVE_STRING_VIEW_FROM_NULLPTR
   s = absl::string_view(nullptr);
   EXPECT_EQ(s.data(), nullptr);
-  EXPECT_EQ(s.size(), 0);
+  EXPECT_EQ(s.size(), 0u);
 
   // .ToString() on a absl::string_view with nullptr should produce the empty
   // string.
@@ -959,7 +959,7 @@ TEST(StringViewTest, NullSafeStringView) {
   {
     absl::string_view s = absl::NullSafeStringView(nullptr);
     EXPECT_EQ(nullptr, s.data());
-    EXPECT_EQ(0, s.size());
+    EXPECT_EQ(0u, s.size());
     EXPECT_EQ(absl::string_view(), s);
   }
   {
@@ -975,7 +975,7 @@ TEST(StringViewTest, ConstexprNullSafeStringView) {
   {
     constexpr absl::string_view s = absl::NullSafeStringView(nullptr);
     EXPECT_EQ(nullptr, s.data());
-    EXPECT_EQ(0, s.size());
+    EXPECT_EQ(0u, s.size());
     EXPECT_EQ(absl::string_view(), s);
   }
 #if !defined(_MSC_VER) || _MSC_VER >= 1910
@@ -990,7 +990,7 @@ TEST(StringViewTest, ConstexprNullSafeStringView) {
   }
   {
     constexpr absl::string_view s = absl::NullSafeStringView("hello");
-    EXPECT_EQ(s.size(), 5);
+    EXPECT_EQ(s.size(), 5u);
     EXPECT_EQ("hello", s);
   }
 #endif
@@ -1036,7 +1036,7 @@ TEST(StringViewTest, ConstexprCompiles) {
 
 #ifdef ABSL_HAVE_CONSTEXPR_STRING_VIEW_FROM_CSTR
   constexpr absl::string_view cstr_strlen("foo");
-  EXPECT_EQ(cstr_strlen.length(), 3);
+  EXPECT_EQ(cstr_strlen.length(), 3u);
   constexpr absl::string_view cstr_strlen2 = "bar";
   EXPECT_EQ(cstr_strlen2, "bar");
 
@@ -1111,7 +1111,7 @@ TEST(StringViewTest, ConstexprCompiles) {
   EXPECT_NE(cstr_ptr, nullptr);
 
   constexpr size_t sp_npos = sp.npos;
-  EXPECT_EQ(sp_npos, -1);
+  EXPECT_EQ(sp_npos, static_cast<size_t>(-1));
 }
 
 constexpr char ConstexprMethodsHelper() {
@@ -1179,7 +1179,7 @@ TEST(StringViewTest, BoundsCheck) {
   // Abseil's string_view implementation has bounds-checking in debug mode.
   absl::string_view h = "hello";
   ABSL_EXPECT_DEATH_IF_SUPPORTED(h[5], "");
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(h[-1], "");
+  ABSL_EXPECT_DEATH_IF_SUPPORTED(h[static_cast<size_t>(-1)], "");
 #endif
 #endif
 }
@@ -1189,7 +1189,7 @@ TEST(ComparisonOpsTest, StringCompareNotAmbiguous) {
   EXPECT_LT("hello", std::string("world"));
 }
 
-TEST(ComparisonOpsTest, HeterogenousStringViewEquals) {
+TEST(ComparisonOpsTest, HeterogeneousStringViewEquals) {
   EXPECT_EQ(absl::string_view("hello"), std::string("hello"));
   EXPECT_EQ("hello", absl::string_view("hello"));
 }
@@ -1201,17 +1201,17 @@ TEST(FindOneCharTest, EdgeCases) {
   a.remove_prefix(1);
   a.remove_suffix(1);
 
-  EXPECT_EQ(0, a.find('x'));
-  EXPECT_EQ(0, a.find('x', 0));
-  EXPECT_EQ(4, a.find('x', 1));
-  EXPECT_EQ(4, a.find('x', 4));
+  EXPECT_EQ(0u, a.find('x'));
+  EXPECT_EQ(0u, a.find('x', 0));
+  EXPECT_EQ(4u, a.find('x', 1));
+  EXPECT_EQ(4u, a.find('x', 4));
   EXPECT_EQ(absl::string_view::npos, a.find('x', 5));
 
-  EXPECT_EQ(4, a.rfind('x'));
-  EXPECT_EQ(4, a.rfind('x', 5));
-  EXPECT_EQ(4, a.rfind('x', 4));
-  EXPECT_EQ(0, a.rfind('x', 3));
-  EXPECT_EQ(0, a.rfind('x', 0));
+  EXPECT_EQ(4u, a.rfind('x'));
+  EXPECT_EQ(4u, a.rfind('x', 5));
+  EXPECT_EQ(4u, a.rfind('x', 4));
+  EXPECT_EQ(0u, a.rfind('x', 3));
+  EXPECT_EQ(0u, a.rfind('x', 0));
 
   // Set a = "yyy".
   a.remove_prefix(1);
@@ -1239,8 +1239,8 @@ TEST(HugeStringView, TwoPointTwoGB) {
 
 #if !defined(NDEBUG) && !defined(ABSL_USES_STD_STRING_VIEW)
 TEST(NonNegativeLenTest, NonNegativeLen) {
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(absl::string_view("xyz", -1),
-                                 "len <= kMaxSize");
+  ABSL_EXPECT_DEATH_IF_SUPPORTED(
+      absl::string_view("xyz", static_cast<size_t>(-1)), "len <= kMaxSize");
 }
 
 TEST(LenExceedsMaxSizeTest, LenExceedsMaxSize) {
diff --git a/third_party/abseil-cpp/absl/strings/strip.h b/third_party/abseil-cpp/absl/strings/strip.h
index 111872ca54..341e66fc92 100644
--- a/third_party/abseil-cpp/absl/strings/strip.h
+++ b/third_party/abseil-cpp/absl/strings/strip.h
@@ -34,8 +34,9 @@ ABSL_NAMESPACE_BEGIN
 
 // ConsumePrefix()
 //
-// Strips the `expected` prefix from the start of the given string, returning
-// `true` if the strip operation succeeded or false otherwise.
+// Strips the `expected` prefix, if found, from the start of `str`.
+// If the operation succeeded, `true` is returned.  If not, `false`
+// is returned and `str` is not modified.
 //
 // Example:
 //
@@ -49,8 +50,9 @@ inline bool ConsumePrefix(absl::string_view* str, absl::string_view expected) {
 }
 // ConsumeSuffix()
 //
-// Strips the `expected` suffix from the end of the given string, returning
-// `true` if the strip operation succeeded or false otherwise.
+// Strips the `expected` suffix, if found, from the end of `str`.
+// If the operation succeeded, `true` is returned.  If not, `false`
+// is returned and `str` is not modified.
 //
 // Example:
 //
@@ -65,7 +67,7 @@ inline bool ConsumeSuffix(absl::string_view* str, absl::string_view expected) {
 
 // StripPrefix()
 //
-// Returns a view into the input string 'str' with the given 'prefix' removed,
+// Returns a view into the input string `str` with the given `prefix` removed,
 // but leaving the original string intact. If the prefix does not match at the
 // start of the string, returns the original string instead.
 ABSL_MUST_USE_RESULT inline absl::string_view StripPrefix(
@@ -76,7 +78,7 @@ ABSL_MUST_USE_RESULT inline absl::string_view StripPrefix(
 
 // StripSuffix()
 //
-// Returns a view into the input string 'str' with the given 'suffix' removed,
+// Returns a view into the input string `str` with the given `suffix` removed,
 // but leaving the original string intact. If the suffix does not match at the
 // end of the string, returns the original string instead.
 ABSL_MUST_USE_RESULT inline absl::string_view StripSuffix(
diff --git a/third_party/abseil-cpp/absl/strings/substitute.cc b/third_party/abseil-cpp/absl/strings/substitute.cc
index 8980b198c2..33a39305db 100644
--- a/third_party/abseil-cpp/absl/strings/substitute.cc
+++ b/third_party/abseil-cpp/absl/strings/substitute.cc
@@ -40,7 +40,8 @@ void SubstituteAndAppendArray(std::string* output, absl::string_view format,
                      absl::CEscape(format).c_str());
 #endif
         return;
-      } else if (absl::ascii_isdigit(format[i + 1])) {
+      } else if (absl::ascii_isdigit(
+                     static_cast<unsigned char>(format[i + 1]))) {
         int index = format[i + 1] - '0';
         if (static_cast<size_t>(index) >= num_args) {
 #ifndef NDEBUG
@@ -80,7 +81,7 @@ void SubstituteAndAppendArray(std::string* output, absl::string_view format,
   char* target = &(*output)[original_size];
   for (size_t i = 0; i < format.size(); i++) {
     if (format[i] == '$') {
-      if (absl::ascii_isdigit(format[i + 1])) {
+      if (absl::ascii_isdigit(static_cast<unsigned char>(format[i + 1]))) {
         const absl::string_view src = args_array[format[i + 1] - '0'];
         target = std::copy(src.begin(), src.end(), target);
         ++i;  // Skip next char.
@@ -110,7 +111,8 @@ Arg::Arg(const void* value) {
     } while (num != 0);
     *--ptr = 'x';
     *--ptr = '0';
-    piece_ = absl::string_view(ptr, scratch_ + sizeof(scratch_) - ptr);
+    piece_ = absl::string_view(
+        ptr, static_cast<size_t>(scratch_ + sizeof(scratch_) - ptr));
   }
 }
 
@@ -132,7 +134,7 @@ Arg::Arg(Hex hex) {
     beg = writer;
   }
 
-  piece_ = absl::string_view(beg, end - beg);
+  piece_ = absl::string_view(beg, static_cast<size_t>(end - beg));
 }
 
 // TODO(jorg): Don't duplicate so much code between here and str_cat.cc
@@ -147,7 +149,7 @@ Arg::Arg(Dec dec) {
     *--writer = '0' + (value % 10);
     value /= 10;
   }
-  *--writer = '0' + value;
+  *--writer = '0' + static_cast<char>(value);
   if (neg) *--writer = '-';
 
   ptrdiff_t fillers = writer - minfill;
@@ -164,7 +166,7 @@ Arg::Arg(Dec dec) {
     if (add_sign_again) *--writer = '-';
   }
 
-  piece_ = absl::string_view(writer, end - writer);
+  piece_ = absl::string_view(writer, static_cast<size_t>(end - writer));
 }
 
 }  // namespace substitute_internal
diff --git a/third_party/abseil-cpp/absl/strings/substitute.h b/third_party/abseil-cpp/absl/strings/substitute.h
index 151c56f543..5c3f6eff34 100644
--- a/third_party/abseil-cpp/absl/strings/substitute.h
+++ b/third_party/abseil-cpp/absl/strings/substitute.h
@@ -55,6 +55,8 @@
 //   * bool (Printed as "true" or "false")
 //   * pointer types other than char* (Printed as "0x<lower case hex string>",
 //     except that null is printed as "NULL")
+//   * user-defined types via the `AbslStringify()` customization point. See the
+//     documentation for `absl::StrCat` for an explanation on how to use this.
 //
 // If an invalid format string is provided, Substitute returns an empty string
 // and SubstituteAndAppend does not change the provided output string.
@@ -79,6 +81,7 @@
 #include "absl/base/port.h"
 #include "absl/strings/ascii.h"
 #include "absl/strings/escaping.h"
+#include "absl/strings/internal/stringify_sink.h"
 #include "absl/strings/numbers.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_split.h"
@@ -102,14 +105,14 @@ class Arg {
   // Overloads for string-y things
   //
   // Explicitly overload `const char*` so the compiler doesn't cast to `bool`.
-  Arg(const char* value)  // NOLINT(runtime/explicit)
+  Arg(const char* value)  // NOLINT(google-explicit-constructor)
       : piece_(absl::NullSafeStringView(value)) {}
   template <typename Allocator>
   Arg(  // NOLINT
       const std::basic_string<char, std::char_traits<char>, Allocator>&
           value) noexcept
       : piece_(value) {}
-  Arg(absl::string_view value)  // NOLINT(runtime/explicit)
+  Arg(absl::string_view value)  // NOLINT(google-explicit-constructor)
       : piece_(value) {}
 
   // Overloads for primitives
@@ -119,48 +122,70 @@ class Arg {
   // probably using them as 8-bit integers and would probably prefer an integer
   // representation. However, we can't really know, so we make the caller decide
   // what to do.
-  Arg(char value)  // NOLINT(runtime/explicit)
+  Arg(char value)  // NOLINT(google-explicit-constructor)
       : piece_(scratch_, 1) {
     scratch_[0] = value;
   }
   Arg(short value)  // NOLINT(*)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
   Arg(unsigned short value)  // NOLINT(*)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(int value)  // NOLINT(runtime/explicit)
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
+  Arg(int value)  // NOLINT(google-explicit-constructor)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(unsigned int value)  // NOLINT(runtime/explicit)
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
+  Arg(unsigned int value)  // NOLINT(google-explicit-constructor)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
   Arg(long value)  // NOLINT(*)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
   Arg(unsigned long value)  // NOLINT(*)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
   Arg(long long value)  // NOLINT(*)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
   Arg(unsigned long long value)  // NOLINT(*)
       : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(float value)  // NOLINT(runtime/explicit)
+               static_cast<size_t>(
+                   numbers_internal::FastIntToBuffer(value, scratch_) -
+                   scratch_)) {}
+  Arg(float value)  // NOLINT(google-explicit-constructor)
       : piece_(scratch_, numbers_internal::SixDigitsToBuffer(value, scratch_)) {
   }
-  Arg(double value)  // NOLINT(runtime/explicit)
+  Arg(double value)  // NOLINT(google-explicit-constructor)
       : piece_(scratch_, numbers_internal::SixDigitsToBuffer(value, scratch_)) {
   }
-  Arg(bool value)  // NOLINT(runtime/explicit)
+  Arg(bool value)  // NOLINT(google-explicit-constructor)
       : piece_(value ? "true" : "false") {}
 
-  Arg(Hex hex);  // NOLINT(runtime/explicit)
-  Arg(Dec dec);  // NOLINT(runtime/explicit)
+  template <typename T, typename = typename std::enable_if<
+                            strings_internal::HasAbslStringify<T>::value>::type>
+  Arg(  // NOLINT(google-explicit-constructor)
+      const T& v, strings_internal::StringifySink&& sink = {})
+      : piece_(strings_internal::ExtractStringification(sink, v)) {}
 
-  // vector<bool>::reference and const_reference require special help to
-  // convert to `AlphaNum` because it requires two user defined conversions.
+  Arg(Hex hex);  // NOLINT(google-explicit-constructor)
+  Arg(Dec dec);  // NOLINT(google-explicit-constructor)
+
+  // vector<bool>::reference and const_reference require special help to convert
+  // to `Arg` because it requires two user defined conversions.
   template <typename T,
             absl::enable_if_t<
                 std::is_class<T>::value &&
@@ -172,7 +197,15 @@ class Arg {
 
   // `void*` values, with the exception of `char*`, are printed as
   // "0x<hex value>". However, in the case of `nullptr`, "NULL" is printed.
-  Arg(const void* value);  // NOLINT(runtime/explicit)
+  Arg(const void* value);  // NOLINT(google-explicit-constructor)
+
+  // Normal enums are already handled by the integer formatters.
+  // This overload matches only scoped enums.
+  template <typename T,
+            typename = typename std::enable_if<
+                std::is_enum<T>{} && !std::is_convertible<T, int>{}>::type>
+  Arg(T value)  // NOLINT(google-explicit-constructor)
+      : Arg(static_cast<typename std::underlying_type<T>::type>(value)) {}
 
   Arg(const Arg&) = delete;
   Arg& operator=(const Arg&) = delete;
diff --git a/third_party/abseil-cpp/absl/strings/substitute_test.cc b/third_party/abseil-cpp/absl/strings/substitute_test.cc
index 442c921528..9f04545f89 100644
--- a/third_party/abseil-cpp/absl/strings/substitute_test.cc
+++ b/third_party/abseil-cpp/absl/strings/substitute_test.cc
@@ -22,6 +22,16 @@
 
 namespace {
 
+struct MyStruct {
+  template <typename Sink>
+  friend void AbslStringify(Sink& sink, const MyStruct& s) {
+    sink.Append("MyStruct{.value = ");
+    sink.Append(absl::StrCat(s.value));
+    sink.Append("}");
+  }
+  int value;
+};
+
 TEST(SubstituteTest, Substitute) {
   // Basic.
   EXPECT_EQ("Hello, world!", absl::Substitute("$0, $1!", "Hello", "world"));
@@ -70,7 +80,7 @@ TEST(SubstituteTest, Substitute) {
   // Volatile Pointer.
   // Like C++ streamed I/O, such pointers implicitly become bool
   volatile int vol = 237;
-  volatile int *volatile volptr = &vol;
+  volatile int* volatile volptr = &vol;
   str = absl::Substitute("$0", volptr);
   EXPECT_EQ("true", str);
 
@@ -128,6 +138,11 @@ TEST(SubstituteTest, Substitute) {
 
   const char* null_cstring = nullptr;
   EXPECT_EQ("Text: ''", absl::Substitute("Text: '$0'", null_cstring));
+
+  MyStruct s1 = MyStruct{17};
+  MyStruct s2 = MyStruct{1043};
+  EXPECT_EQ("MyStruct{.value = 17}, MyStruct{.value = 1043}",
+            absl::Substitute("$0, $1", s1, s2));
 }
 
 TEST(SubstituteTest, SubstituteAndAppend) {
@@ -171,6 +186,12 @@ TEST(SubstituteTest, SubstituteAndAppend) {
   absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b",
                             "c", "d", "e", "f", "g", "h", "i", "j");
   EXPECT_EQ("a b c d e f g h i j", str);
+
+  str.clear();
+  MyStruct s1 = MyStruct{17};
+  MyStruct s2 = MyStruct{1043};
+  absl::SubstituteAndAppend(&str, "$0, $1", s1, s2);
+  EXPECT_EQ("MyStruct{.value = 17}, MyStruct{.value = 1043}", str);
 }
 
 TEST(SubstituteTest, VectorBoolRef) {
@@ -184,6 +205,54 @@ TEST(SubstituteTest, VectorBoolRef) {
   EXPECT_EQ("Logic be like: true false true false", str);
 }
 
+TEST(SubstituteTest, Enums) {
+  enum UnscopedEnum { kEnum0 = 0, kEnum1 = 1 };
+  EXPECT_EQ("0 1", absl::Substitute("$0 $1", UnscopedEnum::kEnum0,
+                                    UnscopedEnum::kEnum1));
+
+  enum class ScopedEnum { kEnum0 = 0, kEnum1 = 1 };
+  EXPECT_EQ("0 1",
+            absl::Substitute("$0 $1", ScopedEnum::kEnum0, ScopedEnum::kEnum1));
+
+  enum class ScopedEnumInt32 : int32_t { kEnum0 = 989, kEnum1 = INT32_MIN };
+  EXPECT_EQ("989 -2147483648",
+            absl::Substitute("$0 $1", ScopedEnumInt32::kEnum0,
+                             ScopedEnumInt32::kEnum1));
+
+  enum class ScopedEnumUInt32 : uint32_t { kEnum0 = 1, kEnum1 = UINT32_MAX };
+  EXPECT_EQ("1 4294967295", absl::Substitute("$0 $1", ScopedEnumUInt32::kEnum0,
+                                             ScopedEnumUInt32::kEnum1));
+
+  enum class ScopedEnumInt64 : int64_t { kEnum0 = -1, kEnum1 = 42949672950 };
+  EXPECT_EQ("-1 42949672950", absl::Substitute("$0 $1", ScopedEnumInt64::kEnum0,
+                                               ScopedEnumInt64::kEnum1));
+
+  enum class ScopedEnumUInt64 : uint64_t { kEnum0 = 1, kEnum1 = 42949672950 };
+  EXPECT_EQ("1 42949672950", absl::Substitute("$0 $1", ScopedEnumUInt64::kEnum0,
+                                              ScopedEnumUInt64::kEnum1));
+
+  enum class ScopedEnumChar : signed char { kEnum0 = -1, kEnum1 = 1 };
+  EXPECT_EQ("-1 1", absl::Substitute("$0 $1", ScopedEnumChar::kEnum0,
+                                     ScopedEnumChar::kEnum1));
+
+  enum class ScopedEnumUChar : unsigned char {
+    kEnum0 = 0,
+    kEnum1 = 1,
+    kEnumMax = 255
+  };
+  EXPECT_EQ("0 1 255", absl::Substitute("$0 $1 $2", ScopedEnumUChar::kEnum0,
+                                        ScopedEnumUChar::kEnum1,
+                                        ScopedEnumUChar::kEnumMax));
+
+  enum class ScopedEnumInt16 : int16_t { kEnum0 = -100, kEnum1 = 10000 };
+  EXPECT_EQ("-100 10000", absl::Substitute("$0 $1", ScopedEnumInt16::kEnum0,
+                                           ScopedEnumInt16::kEnum1));
+
+  enum class ScopedEnumUInt16 : uint16_t { kEnum0 = 0, kEnum1 = 10000 };
+  EXPECT_EQ("0 10000", absl::Substitute("$0 $1", ScopedEnumUInt16::kEnum0,
+                                        ScopedEnumUInt16::kEnum1));
+}
+
 #ifdef GTEST_HAS_DEATH_TEST
 
 TEST(SubstituteDeathTest, SubstituteDeath) {
diff --git a/third_party/abseil-cpp/absl/synchronization/BUILD.bazel b/third_party/abseil-cpp/absl/synchronization/BUILD.bazel
index d71954735a..66bd8742ad 100644
--- a/third_party/abseil-cpp/absl/synchronization/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/synchronization/BUILD.bazel
@@ -34,7 +34,9 @@ cc_library(
     hdrs = [
         "internal/graphcycles.h",
     ],
-    copts = ABSL_DEFAULT_COPTS,
+    copts = ABSL_DEFAULT_COPTS + select({
+        "//conditions:default": [],
+    }),
     linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
@@ -95,8 +97,8 @@ cc_library(
     deps = [
         ":graphcycles_internal",
         ":kernel_timeout_internal",
-        "//absl/base",
         "//absl/base:atomic_hook",
+        "//absl/base",
         "//absl/base:base_internal",
         "//absl/base:config",
         "//absl/base:core_headers",
@@ -106,7 +108,9 @@ cc_library(
         "//absl/debugging:stacktrace",
         "//absl/debugging:symbolize",
         "//absl/time",
-    ],
+    ] + select({
+        "//conditions:default": [],
+    }),
 )
 
 cc_test(
@@ -115,6 +119,9 @@ cc_test(
     srcs = ["barrier_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":synchronization",
         "//absl/time",
@@ -128,6 +135,9 @@ cc_test(
     srcs = ["blocking_counter_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":synchronization",
         "//absl/time",
@@ -249,6 +259,7 @@ cc_test(
     srcs = ["notification_test.cc"],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = ["no_test_lexan"],
     deps = [
         ":synchronization",
         "//absl/time",
@@ -275,9 +286,12 @@ cc_library(
 
 cc_test(
     name = "per_thread_sem_test",
-    size = "medium",
+    size = "large",
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_wasm",
+    ],
     deps = [
         ":per_thread_sem_test_common",
         ":synchronization",
@@ -294,7 +308,10 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["no_test_ios_x86_64"],
+    tags = [
+        "no_test_ios_x86_64",
+        "no_test_wasm",
+    ],
     deps = [
         ":synchronization",
         "//absl/base:core_headers",
diff --git a/third_party/abseil-cpp/absl/synchronization/BUILD.gn b/third_party/abseil-cpp/absl/synchronization/BUILD.gn
new file mode 100644
index 0000000000..343d87ad3a
--- /dev/null
+++ b/third_party/abseil-cpp/absl/synchronization/BUILD.gn
@@ -0,0 +1,89 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("graphcycles_internal") {
+  sources = [ "internal/graphcycles.cc" ]
+  public = [ "internal/graphcycles.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:malloc_internal",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("kernel_timeout_internal") {
+  public = [ "internal/kernel_timeout.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+  visibility = [ ":*" ]
+}
+
+absl_source_set("synchronization") {
+  sources = [
+    "barrier.cc",
+    "blocking_counter.cc",
+    "internal/create_thread_identity.cc",
+    "internal/per_thread_sem.cc",
+    "internal/waiter.cc",
+    "mutex.cc",
+    "notification.cc",
+  ]
+  public = [
+    "barrier.h",
+    "blocking_counter.h",
+    "internal/create_thread_identity.h",
+    "internal/futex.h",
+    "internal/per_thread_sem.h",
+    "internal/waiter.h",
+    "mutex.h",
+    "notification.h",
+  ]
+  deps = [
+    ":graphcycles_internal",
+    ":kernel_timeout_internal",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:atomic_hook",
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:dynamic_annotations",
+    "//third_party/abseil-cpp/absl/base:malloc_internal",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/debugging:stacktrace",
+    "//third_party/abseil-cpp/absl/debugging:symbolize",
+    "//third_party/abseil-cpp/absl/time",
+  ]
+}
+
+absl_source_set("thread_pool") {
+  testonly = true
+  public = [ "internal/thread_pool.h" ]
+  deps = [
+    ":synchronization",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+  ]
+  visibility = [ "//third_party/abseil-cpp/absl/*" ]
+}
+
+absl_source_set("per_thread_sem_test_common") {
+  testonly = true
+  sources = [ "internal/per_thread_sem_test.cc" ]
+  deps = [
+    ":synchronization",
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time",
+    "//third_party/googletest:gtest",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/synchronization/CMakeLists.txt b/third_party/abseil-cpp/absl/synchronization/CMakeLists.txt
index 605efe2d02..9335c26457 100644
--- a/third_party/abseil-cpp/absl/synchronization/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/synchronization/CMakeLists.txt
@@ -14,6 +14,7 @@
 # limitations under the License.
 #
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     graphcycles_internal
@@ -32,6 +33,7 @@ absl_cc_library(
     absl::raw_logging_internal
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     kernel_timeout_internal
@@ -125,6 +127,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     thread_pool
@@ -170,6 +173,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     per_thread_sem_test_common
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.cc b/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.cc
index 53a71b342b..44e6129bb0 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.cc
+++ b/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.cc
@@ -38,7 +38,7 @@ ABSL_CONST_INIT static base_internal::ThreadIdentity* thread_identity_freelist;
 
 // A per-thread destructor for reclaiming associated ThreadIdentity objects.
 // Since we must preserve their storage we cache them for re-use.
-void ReclaimThreadIdentity(void* v) {
+static void ReclaimThreadIdentity(void* v) {
   base_internal::ThreadIdentity* identity =
       static_cast<base_internal::ThreadIdentity*>(v);
 
@@ -48,8 +48,6 @@ void ReclaimThreadIdentity(void* v) {
     base_internal::LowLevelAlloc::Free(identity->per_thread_synch.all_locks);
   }
 
-  PerThreadSem::Destroy(identity);
-
   // We must explicitly clear the current thread's identity:
   // (a) Subsequent (unrelated) per-thread destructors may require an identity.
   //     We must guarantee a new identity is used in this case (this instructor
@@ -71,7 +69,12 @@ static intptr_t RoundUp(intptr_t addr, intptr_t align) {
   return (addr + align - 1) & ~(align - 1);
 }
 
-static void ResetThreadIdentity(base_internal::ThreadIdentity* identity) {
+void OneTimeInitThreadIdentity(base_internal::ThreadIdentity* identity) {
+  PerThreadSem::Init(identity);
+}
+
+static void ResetThreadIdentityBetweenReuse(
+    base_internal::ThreadIdentity* identity) {
   base_internal::PerThreadSynch* pts = &identity->per_thread_synch;
   pts->next = nullptr;
   pts->skip = nullptr;
@@ -116,8 +119,9 @@ static base_internal::ThreadIdentity* NewThreadIdentity() {
     identity = reinterpret_cast<base_internal::ThreadIdentity*>(
         RoundUp(reinterpret_cast<intptr_t>(allocation),
                 base_internal::PerThreadSynch::kAlignment));
+    OneTimeInitThreadIdentity(identity);
   }
-  ResetThreadIdentity(identity);
+  ResetThreadIdentityBetweenReuse(identity);
 
   return identity;
 }
@@ -127,7 +131,6 @@ static base_internal::ThreadIdentity* NewThreadIdentity() {
 // REQUIRES: CurrentThreadIdentity(false) == nullptr
 base_internal::ThreadIdentity* CreateThreadIdentity() {
   base_internal::ThreadIdentity* identity = NewThreadIdentity();
-  PerThreadSem::Init(identity);
   // Associate the value with the current thread, and attach our destructor.
   base_internal::SetCurrentThreadIdentity(identity, ReclaimThreadIdentity);
   return identity;
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.h b/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.h
index e121f68377..4cfde0913c 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.h
+++ b/third_party/abseil-cpp/absl/synchronization/internal/create_thread_identity.h
@@ -36,10 +36,6 @@ namespace synchronization_internal {
 // For private use only.
 base_internal::ThreadIdentity* CreateThreadIdentity();
 
-// A per-thread destructor for reclaiming associated ThreadIdentity objects.
-// For private use only.
-void ReclaimThreadIdentity(void* v);
-
 // Returns the ThreadIdentity object representing the calling thread; guaranteed
 // to be unique for its lifetime.  The returned object will remain valid for the
 // program's lifetime; although it may be re-assigned to a subsequent thread.
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/futex.h b/third_party/abseil-cpp/absl/synchronization/internal/futex.h
index 06fbd6d072..cb97da09ce 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/futex.h
+++ b/third_party/abseil-cpp/absl/synchronization/internal/futex.h
@@ -87,7 +87,7 @@ class FutexImpl {
  public:
   static int WaitUntil(std::atomic<int32_t> *v, int32_t val,
                        KernelTimeout t) {
-    int err = 0;
+    long err = 0;  // NOLINT(runtime/int)
     if (t.has_timeout()) {
       // https://locklessinc.com/articles/futex_cheat_sheet/
       // Unlike FUTEX_WAIT, FUTEX_WAIT_BITSET uses absolute time.
@@ -105,41 +105,44 @@ class FutexImpl {
                     FUTEX_WAIT | FUTEX_PRIVATE_FLAG, val, nullptr);
     }
     if (ABSL_PREDICT_FALSE(err != 0)) {
-      err = -errno;
+      return -errno;
     }
-    return err;
+    return 0;
   }
 
   static int WaitBitsetAbsoluteTimeout(std::atomic<int32_t> *v, int32_t val,
                                        int32_t bits,
                                        const struct timespec *abstime) {
-    int err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                      FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG, val, abstime,
-                      nullptr, bits);
+    // NOLINTNEXTLINE(runtime/int)
+    long err = syscall(SYS_futex, reinterpret_cast<int32_t*>(v),
+                       FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG, val, abstime,
+                       nullptr, bits);
     if (ABSL_PREDICT_FALSE(err != 0)) {
-      err = -errno;
+      return -errno;
     }
-    return err;
+    return 0;
   }
 
   static int Wake(std::atomic<int32_t> *v, int32_t count) {
-    int err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                      FUTEX_WAKE | FUTEX_PRIVATE_FLAG, count);
+    // NOLINTNEXTLINE(runtime/int)
+    long err = syscall(SYS_futex, reinterpret_cast<int32_t*>(v),
+                       FUTEX_WAKE | FUTEX_PRIVATE_FLAG, count);
     if (ABSL_PREDICT_FALSE(err < 0)) {
-      err = -errno;
+      return -errno;
     }
-    return err;
+    return 0;
   }
 
   // FUTEX_WAKE_BITSET
   static int WakeBitset(std::atomic<int32_t> *v, int32_t count, int32_t bits) {
-    int err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                      FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG, count, nullptr,
-                      nullptr, bits);
+    // NOLINTNEXTLINE(runtime/int)
+    long err = syscall(SYS_futex, reinterpret_cast<int32_t*>(v),
+                       FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG, count, nullptr,
+                       nullptr, bits);
     if (ABSL_PREDICT_FALSE(err < 0)) {
-      err = -errno;
+      return -errno;
     }
-    return err;
+    return 0;
   }
 };
 
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/graphcycles.cc b/third_party/abseil-cpp/absl/synchronization/internal/graphcycles.cc
index 27fec21681..feec4581fe 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/graphcycles.cc
+++ b/third_party/abseil-cpp/absl/synchronization/internal/graphcycles.cc
@@ -181,9 +181,9 @@ class NodeSet {
     return true;
   }
 
-  void erase(uint32_t v) {
+  void erase(int32_t v) {
     uint32_t i = FindIndex(v);
-    if (static_cast<uint32_t>(table_[i]) == v) {
+    if (table_[i] == v) {
       table_[i] = kDel;
     }
   }
@@ -195,7 +195,7 @@ class NodeSet {
   for (int32_t elem, _cursor = 0; (eset).Next(&_cursor, &elem); )
   bool Next(int32_t* cursor, int32_t* elem) {
     while (static_cast<uint32_t>(*cursor) < table_.size()) {
-      int32_t v = table_[*cursor];
+      int32_t v = table_[static_cast<uint32_t>(*cursor)];
       (*cursor)++;
       if (v >= 0) {
         *elem = v;
@@ -210,24 +210,26 @@ class NodeSet {
   Vec<int32_t> table_;
   uint32_t occupied_;     // Count of non-empty slots (includes deleted slots)
 
-  static uint32_t Hash(uint32_t a) { return a * 41; }
+  static uint32_t Hash(int32_t a) { return static_cast<uint32_t>(a * 41); }
 
   // Return index for storing v.  May return an empty index or deleted index
-  int FindIndex(int32_t v) const {
+  uint32_t FindIndex(int32_t v) const {
     // Search starting at hash index.
     const uint32_t mask = table_.size() - 1;
     uint32_t i = Hash(v) & mask;
-    int deleted_index = -1;  // If >= 0, index of first deleted element we see
+    uint32_t deleted_index = 0;  // index of first deleted element we see
+    bool seen_deleted_element = false;
     while (true) {
       int32_t e = table_[i];
       if (v == e) {
         return i;
       } else if (e == kEmpty) {
         // Return any previously encountered deleted slot.
-        return (deleted_index >= 0) ? deleted_index : i;
-      } else if (e == kDel && deleted_index < 0) {
+        return seen_deleted_element ? deleted_index : i;
+      } else if (e == kDel && !seen_deleted_element) {
         // Keep searching since v might be present later.
         deleted_index = i;
+        seen_deleted_element = true;
       }
       i = (i + 1) & mask;  // Linear probing; quadratic is slightly slower.
     }
@@ -268,7 +270,7 @@ inline GraphId MakeId(int32_t index, uint32_t version) {
 }
 
 inline int32_t NodeIndex(GraphId id) {
-  return static_cast<uint32_t>(id.handle & 0xfffffffful);
+  return static_cast<int32_t>(id.handle);
 }
 
 inline uint32_t NodeVersion(GraphId id) {
@@ -298,7 +300,7 @@ class PointerMap {
   int32_t Find(void* ptr) {
     auto masked = base_internal::HidePtr(ptr);
     for (int32_t i = table_[Hash(ptr)]; i != -1;) {
-      Node* n = (*nodes_)[i];
+      Node* n = (*nodes_)[static_cast<uint32_t>(i)];
       if (n->masked_ptr == masked) return i;
       i = n->next_hash;
     }
@@ -307,7 +309,7 @@ class PointerMap {
 
   void Add(void* ptr, int32_t i) {
     int32_t* head = &table_[Hash(ptr)];
-    (*nodes_)[i]->next_hash = *head;
+    (*nodes_)[static_cast<uint32_t>(i)]->next_hash = *head;
     *head = i;
   }
 
@@ -317,7 +319,7 @@ class PointerMap {
     auto masked = base_internal::HidePtr(ptr);
     for (int32_t* slot = &table_[Hash(ptr)]; *slot != -1; ) {
       int32_t index = *slot;
-      Node* n = (*nodes_)[index];
+      Node* n = (*nodes_)[static_cast<uint32_t>(index)];
       if (n->masked_ptr == masked) {
         *slot = n->next_hash;  // Remove n from linked list
         n->next_hash = -1;
@@ -358,7 +360,7 @@ struct GraphCycles::Rep {
 };
 
 static Node* FindNode(GraphCycles::Rep* rep, GraphId id) {
-  Node* n = rep->nodes_[NodeIndex(id)];
+  Node* n = rep->nodes_[static_cast<uint32_t>(NodeIndex(id))];
   return (n->version == NodeVersion(id)) ? n : nullptr;
 }
 
@@ -393,7 +395,7 @@ bool GraphCycles::CheckInvariants() const {
       ABSL_RAW_LOG(FATAL, "Duplicate occurrence of rank %d", nx->rank);
     }
     HASH_FOR_EACH(y, nx->out) {
-      Node* ny = r->nodes_[y];
+      Node* ny = r->nodes_[static_cast<uint32_t>(y)];
       if (nx->rank >= ny->rank) {
         ABSL_RAW_LOG(FATAL, "Edge %u->%d has bad rank assignment %d->%d", x, y,
                      nx->rank, ny->rank);
@@ -406,14 +408,14 @@ bool GraphCycles::CheckInvariants() const {
 GraphId GraphCycles::GetId(void* ptr) {
   int32_t i = rep_->ptrmap_.Find(ptr);
   if (i != -1) {
-    return MakeId(i, rep_->nodes_[i]->version);
+    return MakeId(i, rep_->nodes_[static_cast<uint32_t>(i)]->version);
   } else if (rep_->free_nodes_.empty()) {
     Node* n =
         new (base_internal::LowLevelAlloc::AllocWithArena(sizeof(Node), arena))
             Node;
     n->version = 1;  // Avoid 0 since it is used by InvalidGraphId()
     n->visited = false;
-    n->rank = rep_->nodes_.size();
+    n->rank = static_cast<int32_t>(rep_->nodes_.size());
     n->masked_ptr = base_internal::HidePtr(ptr);
     n->nstack = 0;
     n->priority = 0;
@@ -425,7 +427,7 @@ GraphId GraphCycles::GetId(void* ptr) {
     // a permutation of [0,rep_->nodes_.size()-1].
     int32_t r = rep_->free_nodes_.back();
     rep_->free_nodes_.pop_back();
-    Node* n = rep_->nodes_[r];
+    Node* n = rep_->nodes_[static_cast<uint32_t>(r)];
     n->masked_ptr = base_internal::HidePtr(ptr);
     n->nstack = 0;
     n->priority = 0;
@@ -439,12 +441,12 @@ void GraphCycles::RemoveNode(void* ptr) {
   if (i == -1) {
     return;
   }
-  Node* x = rep_->nodes_[i];
+  Node* x = rep_->nodes_[static_cast<uint32_t>(i)];
   HASH_FOR_EACH(y, x->out) {
-    rep_->nodes_[y]->in.erase(i);
+    rep_->nodes_[static_cast<uint32_t>(y)]->in.erase(i);
   }
   HASH_FOR_EACH(y, x->in) {
-    rep_->nodes_[y]->out.erase(i);
+    rep_->nodes_[static_cast<uint32_t>(y)]->out.erase(i);
   }
   x->in.clear();
   x->out.clear();
@@ -520,7 +522,7 @@ bool GraphCycles::InsertEdge(GraphId idx, GraphId idy) {
     // Since we do not call Reorder() on this path, clear any visited
     // markers left by ForwardDFS.
     for (const auto& d : r->deltaf_) {
-      r->nodes_[d]->visited = false;
+      r->nodes_[static_cast<uint32_t>(d)]->visited = false;
     }
     return false;
   }
@@ -538,14 +540,14 @@ static bool ForwardDFS(GraphCycles::Rep* r, int32_t n, int32_t upper_bound) {
   while (!r->stack_.empty()) {
     n = r->stack_.back();
     r->stack_.pop_back();
-    Node* nn = r->nodes_[n];
+    Node* nn = r->nodes_[static_cast<uint32_t>(n)];
     if (nn->visited) continue;
 
     nn->visited = true;
     r->deltaf_.push_back(n);
 
     HASH_FOR_EACH(w, nn->out) {
-      Node* nw = r->nodes_[w];
+      Node* nw = r->nodes_[static_cast<uint32_t>(w)];
       if (nw->rank == upper_bound) {
         return false;  // Cycle
       }
@@ -564,14 +566,14 @@ static void BackwardDFS(GraphCycles::Rep* r, int32_t n, int32_t lower_bound) {
   while (!r->stack_.empty()) {
     n = r->stack_.back();
     r->stack_.pop_back();
-    Node* nn = r->nodes_[n];
+    Node* nn = r->nodes_[static_cast<uint32_t>(n)];
     if (nn->visited) continue;
 
     nn->visited = true;
     r->deltab_.push_back(n);
 
     HASH_FOR_EACH(w, nn->in) {
-      Node* nw = r->nodes_[w];
+      Node* nw = r->nodes_[static_cast<uint32_t>(w)];
       if (!nw->visited && lower_bound < nw->rank) {
         r->stack_.push_back(w);
       }
@@ -596,7 +598,7 @@ static void Reorder(GraphCycles::Rep* r) {
 
   // Assign the ranks in order to the collected list.
   for (uint32_t i = 0; i < r->list_.size(); i++) {
-    r->nodes_[r->list_[i]]->rank = r->merged_[i];
+    r->nodes_[static_cast<uint32_t>(r->list_[i])]->rank = r->merged_[i];
   }
 }
 
@@ -604,7 +606,8 @@ static void Sort(const Vec<Node*>& nodes, Vec<int32_t>* delta) {
   struct ByRank {
     const Vec<Node*>* nodes;
     bool operator()(int32_t a, int32_t b) const {
-      return (*nodes)[a]->rank < (*nodes)[b]->rank;
+      return (*nodes)[static_cast<uint32_t>(a)]->rank <
+             (*nodes)[static_cast<uint32_t>(b)]->rank;
     }
   };
   ByRank cmp;
@@ -616,8 +619,10 @@ static void MoveToList(
     GraphCycles::Rep* r, Vec<int32_t>* src, Vec<int32_t>* dst) {
   for (auto& v : *src) {
     int32_t w = v;
-    v = r->nodes_[w]->rank;         // Replace v entry with its rank
-    r->nodes_[w]->visited = false;  // Prepare for future DFS calls
+    // Replace v entry with its rank
+    v = r->nodes_[static_cast<uint32_t>(w)]->rank;
+    // Prepare for future DFS calls
+    r->nodes_[static_cast<uint32_t>(w)]->visited = false;
     dst->push_back(w);
   }
 }
@@ -647,7 +652,8 @@ int GraphCycles::FindPath(GraphId idx, GraphId idy, int max_path_len,
     }
 
     if (path_len < max_path_len) {
-      path[path_len] = MakeId(n, rep_->nodes_[n]->version);
+      path[path_len] =
+          MakeId(n, rep_->nodes_[static_cast<uint32_t>(n)]->version);
     }
     path_len++;
     r->stack_.push_back(-1);  // Will remove tentative path entry
@@ -656,7 +662,7 @@ int GraphCycles::FindPath(GraphId idx, GraphId idy, int max_path_len,
       return path_len;
     }
 
-    HASH_FOR_EACH(w, r->nodes_[n]->out) {
+    HASH_FOR_EACH(w, r->nodes_[static_cast<uint32_t>(n)]->out) {
       if (seen.insert(w)) {
         r->stack_.push_back(w);
       }
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/kernel_timeout.h b/third_party/abseil-cpp/absl/synchronization/internal/kernel_timeout.h
index bbd4d2d70f..44a3a2e802 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/kernel_timeout.h
+++ b/third_party/abseil-cpp/absl/synchronization/internal/kernel_timeout.h
@@ -111,7 +111,8 @@ class KernelTimeout {
       constexpr uint64_t max_nanos =
           (std::numeric_limits<int64_t>::max)() - 999999u;
       uint64_t ms_from_now =
-          (std::min<uint64_t>(max_nanos, ns_ - now) + 999999u) / 1000000u;
+          ((std::min)(max_nanos, static_cast<uint64_t>(ns_ - now)) + 999999u) /
+          1000000u;
       if (ms_from_now > kInfinite) {
         return kInfinite;
       }
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.cc b/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.cc
index a6031787e0..469e8f3298 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.cc
+++ b/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.cc
@@ -47,10 +47,6 @@ void PerThreadSem::Init(base_internal::ThreadIdentity *identity) {
   identity->is_idle.store(false, std::memory_order_relaxed);
 }
 
-void PerThreadSem::Destroy(base_internal::ThreadIdentity *identity) {
-  Waiter::GetWaiter(identity)->~Waiter();
-}
-
 void PerThreadSem::Tick(base_internal::ThreadIdentity *identity) {
   const int ticker =
       identity->ticker.fetch_add(1, std::memory_order_relaxed) + 1;
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.h b/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.h
index 7beae8ef1d..90a88809e4 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.h
+++ b/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem.h
@@ -66,10 +66,6 @@ class PerThreadSem {
   // REQUIRES: May only be called by ThreadIdentity.
   static void Init(base_internal::ThreadIdentity* identity);
 
-  // Destroy the PerThreadSem associated with "identity".
-  // REQUIRES: May only be called by ThreadIdentity.
-  static void Destroy(base_internal::ThreadIdentity* identity);
-
   // Increments "identity"'s count.
   static inline void Post(base_internal::ThreadIdentity* identity);
 
@@ -81,8 +77,7 @@ class PerThreadSem {
   // Permitted callers.
   friend class PerThreadSemTest;
   friend class absl::Mutex;
-  friend absl::base_internal::ThreadIdentity* CreateThreadIdentity();
-  friend void ReclaimThreadIdentity(void* v);
+  friend void OneTimeInitThreadIdentity(absl::base_internal::ThreadIdentity*);
 };
 
 }  // namespace synchronization_internal
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem_test.cc b/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem_test.cc
index db1184e679..24a6b54827 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem_test.cc
+++ b/third_party/abseil-cpp/absl/synchronization/internal/per_thread_sem_test.cc
@@ -174,6 +174,15 @@ TEST_F(PerThreadSemTest, Timeouts) {
   EXPECT_TRUE(Wait(negative_timeout));
 }
 
+TEST_F(PerThreadSemTest, ThreadIdentityReuse) {
+  // Create a base_internal::ThreadIdentity object and keep reusing it. There
+  // should be no memory or resource leaks.
+  for (int i = 0; i < 10000; i++) {
+    std::thread t([]() { GetOrCreateCurrentThreadIdentity(); });
+    t.join();
+  }
+}
+
 }  // namespace
 
 }  // namespace synchronization_internal
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/waiter.cc b/third_party/abseil-cpp/absl/synchronization/internal/waiter.cc
index 28ef311e4a..f2051d6725 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/waiter.cc
+++ b/third_party/abseil-cpp/absl/synchronization/internal/waiter.cc
@@ -71,8 +71,6 @@ Waiter::Waiter() {
   futex_.store(0, std::memory_order_relaxed);
 }
 
-Waiter::~Waiter() = default;
-
 bool Waiter::Wait(KernelTimeout t) {
   // Loop until we can atomically decrement futex from a positive
   // value, waiting on a futex while we believe it is zero.
@@ -161,18 +159,6 @@ Waiter::Waiter() {
   wakeup_count_ = 0;
 }
 
-Waiter::~Waiter() {
-  const int err = pthread_mutex_destroy(&mu_);
-  if (err != 0) {
-    ABSL_RAW_LOG(FATAL, "pthread_mutex_destroy failed: %d", err);
-  }
-
-  const int err2 = pthread_cond_destroy(&cv_);
-  if (err2 != 0) {
-    ABSL_RAW_LOG(FATAL, "pthread_cond_destroy failed: %d", err2);
-  }
-}
-
 bool Waiter::Wait(KernelTimeout t) {
   struct timespec abs_timeout;
   if (t.has_timeout()) {
@@ -240,12 +226,6 @@ Waiter::Waiter() {
   wakeups_.store(0, std::memory_order_relaxed);
 }
 
-Waiter::~Waiter() {
-  if (sem_destroy(&sem_) != 0) {
-    ABSL_RAW_LOG(FATAL, "sem_destroy failed with errno %d\n", errno);
-  }
-}
-
 bool Waiter::Wait(KernelTimeout t) {
   struct timespec abs_timeout;
   if (t.has_timeout()) {
@@ -363,11 +343,6 @@ Waiter::Waiter() {
   wakeup_count_ = 0;
 }
 
-// SRW locks and condition variables do not need to be explicitly destroyed.
-// https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-initializesrwlock
-// https://stackoverflow.com/questions/28975958/why-does-windows-have-no-deleteconditionvariable-function-to-go-together-with
-Waiter::~Waiter() = default;
-
 bool Waiter::Wait(KernelTimeout t) {
   SRWLOCK *mu = WinHelper::GetLock(this);
   CONDITION_VARIABLE *cv = WinHelper::GetCond(this);
diff --git a/third_party/abseil-cpp/absl/synchronization/internal/waiter.h b/third_party/abseil-cpp/absl/synchronization/internal/waiter.h
index be3df180d4..b8adfeb537 100644
--- a/third_party/abseil-cpp/absl/synchronization/internal/waiter.h
+++ b/third_party/abseil-cpp/absl/synchronization/internal/waiter.h
@@ -71,9 +71,6 @@ class Waiter {
   Waiter(const Waiter&) = delete;
   Waiter& operator=(const Waiter&) = delete;
 
-  // Destroy any data to track waits.
-  ~Waiter();
-
   // Blocks the calling thread until a matching call to `Post()` or
   // `t` has passed. Returns `true` if woken (`Post()` called),
   // `false` on timeout.
@@ -106,6 +103,12 @@ class Waiter {
 #endif
 
  private:
+  // The destructor must not be called since Mutex/CondVar
+  // can use PerThreadSem/Waiter after the thread exits.
+  // Waiter objects are embedded in ThreadIdentity objects,
+  // which are reused via a freelist and are never destroyed.
+  ~Waiter() = delete;
+
 #if ABSL_WAITER_MODE == ABSL_WAITER_MODE_FUTEX
   // Futexes are defined by specification to be 32-bits.
   // Thus std::atomic<int32_t> must be just an int32_t with lockfree methods.
@@ -136,8 +139,11 @@ class Waiter {
   // REQUIRES: WinHelper::GetLock(this) must be held.
   void InternalCondVarPoke();
 
-  // We can't include Windows.h in our headers, so we use aligned charachter
+  // We can't include Windows.h in our headers, so we use aligned character
   // buffers to define the storage of SRWLOCK and CONDITION_VARIABLE.
+  // SRW locks and condition variables do not need to be explicitly destroyed.
+  // https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-initializesrwlock
+  // https://stackoverflow.com/questions/28975958/why-does-windows-have-no-deleteconditionvariable-function-to-go-together-with
   alignas(void*) unsigned char mu_storage_[sizeof(void*)];
   alignas(void*) unsigned char cv_storage_[sizeof(void*)];
   int waiter_count_;
diff --git a/third_party/abseil-cpp/absl/synchronization/mutex.cc b/third_party/abseil-cpp/absl/synchronization/mutex.cc
index 76ad41fe16..b0f412bf98 100644
--- a/third_party/abseil-cpp/absl/synchronization/mutex.cc
+++ b/third_party/abseil-cpp/absl/synchronization/mutex.cc
@@ -36,6 +36,7 @@
 #include <algorithm>
 #include <atomic>
 #include <cinttypes>
+#include <cstddef>
 #include <thread>  // NOLINT(build/c++11)
 
 #include "absl/base/attributes.h"
@@ -109,7 +110,7 @@ static inline bool EvalConditionAnnotated(const Condition *cond, Mutex *mu,
                                           bool locking, bool trylock,
                                           bool read_lock);
 
-void RegisterMutexProfiler(void (*fn)(int64_t wait_timestamp)) {
+void RegisterMutexProfiler(void (*fn)(int64_t wait_cycles)) {
   submit_profile_data.Store(fn);
 }
 
@@ -134,25 +135,42 @@ enum DelayMode { AGGRESSIVE, GENTLE };
 struct ABSL_CACHELINE_ALIGNED MutexGlobals {
   absl::once_flag once;
   int spinloop_iterations = 0;
-  int32_t mutex_sleep_limit[2] = {};
+  int32_t mutex_sleep_spins[2] = {};
+  absl::Duration mutex_sleep_time;
 };
 
+absl::Duration MeasureTimeToYield() {
+  absl::Time before = absl::Now();
+  ABSL_INTERNAL_C_SYMBOL(AbslInternalMutexYield)();
+  return absl::Now() - before;
+}
+
 const MutexGlobals &GetMutexGlobals() {
   ABSL_CONST_INIT static MutexGlobals data;
   absl::base_internal::LowLevelCallOnce(&data.once, [&]() {
     const int num_cpus = absl::base_internal::NumCPUs();
     data.spinloop_iterations = num_cpus > 1 ? 1500 : 0;
-    // If this a uniprocessor, only yield/sleep.  Otherwise, if the mode is
+    // If this a uniprocessor, only yield/sleep.
+    // Real-time threads are often unable to yield, so the sleep time needs
+    // to be long enough to keep the calling thread asleep until scheduling
+    // happens.
+    // If this is multiprocessor, allow spinning. If the mode is
     // aggressive then spin many times before yielding.  If the mode is
     // gentle then spin only a few times before yielding.  Aggressive spinning
     // is used to ensure that an Unlock() call, which must get the spin lock
     // for any thread to make progress gets it without undue delay.
     if (num_cpus > 1) {
-      data.mutex_sleep_limit[AGGRESSIVE] = 5000;
-      data.mutex_sleep_limit[GENTLE] = 250;
+      data.mutex_sleep_spins[AGGRESSIVE] = 5000;
+      data.mutex_sleep_spins[GENTLE] = 250;
+      data.mutex_sleep_time = absl::Microseconds(10);
     } else {
-      data.mutex_sleep_limit[AGGRESSIVE] = 0;
-      data.mutex_sleep_limit[GENTLE] = 0;
+      data.mutex_sleep_spins[AGGRESSIVE] = 0;
+      data.mutex_sleep_spins[GENTLE] = 0;
+      data.mutex_sleep_time = MeasureTimeToYield() * 5;
+      data.mutex_sleep_time =
+          std::min(data.mutex_sleep_time, absl::Milliseconds(1));
+      data.mutex_sleep_time =
+          std::max(data.mutex_sleep_time, absl::Microseconds(10));
     }
   });
   return data;
@@ -163,7 +181,8 @@ namespace synchronization_internal {
 // Returns the Mutex delay on iteration `c` depending on the given `mode`.
 // The returned value should be used as `c` for the next call to `MutexDelay`.
 int MutexDelay(int32_t c, int mode) {
-  const int32_t limit = GetMutexGlobals().mutex_sleep_limit[mode];
+  const int32_t limit = GetMutexGlobals().mutex_sleep_spins[mode];
+  const absl::Duration sleep_time = GetMutexGlobals().mutex_sleep_time;
   if (c < limit) {
     // Spin.
     c++;
@@ -176,7 +195,7 @@ int MutexDelay(int32_t c, int mode) {
       c++;
     } else {
       // Then wait.
-      absl::SleepFor(absl::Microseconds(10));
+      absl::SleepFor(sleep_time);
       c = 0;
     }
     ABSL_TSAN_MUTEX_POST_DIVERT(nullptr, 0);
@@ -325,7 +344,7 @@ static struct SynchEvent {     // this is a trivial hash table for the events
 static SynchEvent *EnsureSynchEvent(std::atomic<intptr_t> *addr,
                                     const char *name, intptr_t bits,
                                     intptr_t lockbit) {
-  uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
+  uint32_t h = reinterpret_cast<uintptr_t>(addr) % kNSynchEvent;
   SynchEvent *e;
   // first look for existing SynchEvent struct..
   synch_event_mu.Lock();
@@ -378,7 +397,7 @@ static void UnrefSynchEvent(SynchEvent *e) {
 // is clear before doing so).
 static void ForgetSynchEvent(std::atomic<intptr_t> *addr, intptr_t bits,
                              intptr_t lockbit) {
-  uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
+  uint32_t h = reinterpret_cast<uintptr_t>(addr) % kNSynchEvent;
   SynchEvent **pe;
   SynchEvent *e;
   synch_event_mu.Lock();
@@ -402,7 +421,7 @@ static void ForgetSynchEvent(std::atomic<intptr_t> *addr, intptr_t bits,
 // "addr", if any.  The pointer returned is valid until the UnrefSynchEvent() is
 // called.
 static SynchEvent *GetSynchEvent(const void *addr) {
-  uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
+  uint32_t h = reinterpret_cast<uintptr_t>(addr) % kNSynchEvent;
   SynchEvent *e;
   synch_event_mu.Lock();
   for (e = synch_event[h];
@@ -430,7 +449,13 @@ static void PostSynchEvent(void *obj, int ev) {
     char buffer[ABSL_ARRAYSIZE(pcs) * 24];
     int pos = snprintf(buffer, sizeof (buffer), " @");
     for (int i = 0; i != n; i++) {
-      pos += snprintf(&buffer[pos], sizeof (buffer) - pos, " %p", pcs[i]);
+      int b = snprintf(&buffer[pos], sizeof(buffer) - static_cast<size_t>(pos),
+                       " %p", pcs[i]);
+      if (b < 0 ||
+          static_cast<size_t>(b) >= sizeof(buffer) - static_cast<size_t>(pos)) {
+        break;
+      }
+      pos += b;
     }
     ABSL_RAW_LOG(INFO, "%s%p %s %s", event_properties[ev].msg, obj,
                  (e == nullptr ? "" : e->name), buffer);
@@ -486,7 +511,8 @@ struct SynchWaitParams {
         cvmu(cvmu_arg),
         thread(thread_arg),
         cv_word(cv_word_arg),
-        contention_start_cycles(base_internal::CycleClock::Now()) {}
+        contention_start_cycles(base_internal::CycleClock::Now()),
+        should_submit_contention_data(false) {}
 
   const Mutex::MuHow how;  // How this thread needs to wait.
   const Condition *cond;  // The condition that this thread is waiting for.
@@ -504,6 +530,7 @@ struct SynchWaitParams {
 
   int64_t contention_start_cycles;  // Time (in cycles) when this thread started
                                     // to contend for the mutex.
+  bool should_submit_contention_data;
 };
 
 struct SynchLocksHeld {
@@ -1273,15 +1300,17 @@ static char *StackString(void **pcs, int n, char *buf, int maxlen,
   char sym[kSymLen];
   int len = 0;
   for (int i = 0; i != n; i++) {
+    if (len >= maxlen)
+      return buf;
+    size_t count = static_cast<size_t>(maxlen - len);
     if (symbolize) {
       if (!symbolizer(pcs[i], sym, kSymLen)) {
         sym[0] = '\0';
       }
-      snprintf(buf + len, maxlen - len, "%s\t@ %p %s\n",
-               (i == 0 ? "\n" : ""),
-               pcs[i], sym);
+      snprintf(buf + len, count, "%s\t@ %p %s\n", (i == 0 ? "\n" : ""), pcs[i],
+               sym);
     } else {
-      snprintf(buf + len, maxlen - len, " %p", pcs[i]);
+      snprintf(buf + len, count, " %p", pcs[i]);
     }
     len += strlen(&buf[len]);
   }
@@ -1366,12 +1395,12 @@ static GraphId DeadlockCheck(Mutex *mu) {
       bool symbolize = number_of_reported_deadlocks <= 2;
       ABSL_RAW_LOG(ERROR, "Potential Mutex deadlock: %s",
                    CurrentStackString(b->buf, sizeof (b->buf), symbolize));
-      int len = 0;
+      size_t len = 0;
       for (int j = 0; j != all_locks->n; j++) {
         void* pr = deadlock_graph->Ptr(all_locks->locks[j].id);
         if (pr != nullptr) {
           snprintf(b->buf + len, sizeof (b->buf) - len, " %p", pr);
-          len += static_cast<int>(strlen(&b->buf[len]));
+          len += strlen(&b->buf[len]);
         }
       }
       ABSL_RAW_LOG(ERROR,
@@ -1744,23 +1773,33 @@ ABSL_XRAY_LOG_ARGS(1) void Mutex::ReaderUnlock() {
   ABSL_TSAN_MUTEX_POST_UNLOCK(this, __tsan_mutex_read_lock);
 }
 
-// The zap_desig_waker bitmask is used to clear the designated waker flag in
-// the mutex if this thread has blocked, and therefore may be the designated
-// waker.
-static const intptr_t zap_desig_waker[] = {
-    ~static_cast<intptr_t>(0),  // not blocked
-    ~static_cast<intptr_t>(
-        kMuDesig)  // blocked; turn off the designated waker bit
-};
+// Clears the designated waker flag in the mutex if this thread has blocked, and
+// therefore may be the designated waker.
+static intptr_t ClearDesignatedWakerMask(int flag) {
+  assert(flag >= 0);
+  assert(flag <= 1);
+  switch (flag) {
+    case 0:  // not blocked
+      return ~static_cast<intptr_t>(0);
+    case 1:  // blocked; turn off the designated waker bit
+      return ~static_cast<intptr_t>(kMuDesig);
+  }
+  ABSL_INTERNAL_UNREACHABLE;
+}
 
-// The ignore_waiting_writers bitmask is used to ignore the existence
-// of waiting writers if a reader that has already blocked once
-// wakes up.
-static const intptr_t ignore_waiting_writers[] = {
-    ~static_cast<intptr_t>(0),  // not blocked
-    ~static_cast<intptr_t>(
-        kMuWrWait)  // blocked; pretend there are no waiting writers
-};
+// Conditionally ignores the existence of waiting writers if a reader that has
+// already blocked once wakes up.
+static intptr_t IgnoreWaitingWritersMask(int flag) {
+  assert(flag >= 0);
+  assert(flag <= 1);
+  switch (flag) {
+    case 0:  // not blocked
+      return ~static_cast<intptr_t>(0);
+    case 1:  // blocked; pretend there are no waiting writers
+      return ~static_cast<intptr_t>(kMuWrWait);
+  }
+  ABSL_INTERNAL_UNREACHABLE;
+}
 
 // Internal version of LockWhen().  See LockSlowWithDeadline()
 ABSL_ATTRIBUTE_NOINLINE void Mutex::LockSlow(MuHow how, const Condition *cond,
@@ -1780,8 +1819,8 @@ static inline bool EvalConditionAnnotated(const Condition *cond, Mutex *mu,
   // operation tsan considers that we've already released the mutex.
   bool res = false;
 #ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-  const int flags = read_lock ? __tsan_mutex_read_lock : 0;
-  const int tryflags = flags | (trylock ? __tsan_mutex_try_lock : 0);
+  const uint32_t flags = read_lock ? __tsan_mutex_read_lock : 0;
+  const uint32_t tryflags = flags | (trylock ? __tsan_mutex_try_lock : 0);
 #endif
   if (locking) {
     // For lock we pretend that we have finished the operation,
@@ -1852,8 +1891,10 @@ bool Mutex::LockSlowWithDeadline(MuHow how, const Condition *cond,
   bool unlock = false;
   if ((v & how->fast_need_zero) == 0 &&  // try fast acquire
       mu_.compare_exchange_strong(
-          v, (how->fast_or | (v & zap_desig_waker[flags & kMuHasBlocked])) +
-                 how->fast_add,
+          v,
+          (how->fast_or |
+           (v & ClearDesignatedWakerMask(flags & kMuHasBlocked))) +
+              how->fast_add,
           std::memory_order_acquire, std::memory_order_relaxed)) {
     if (cond == nullptr ||
         EvalConditionAnnotated(cond, this, true, false, how == kShared)) {
@@ -1892,7 +1933,7 @@ static void CheckForMutexCorruption(intptr_t v, const char* label) {
   // Test for either of two situations that should not occur in v:
   //   kMuWriter and kMuReader
   //   kMuWrWait and !kMuWait
-  const uintptr_t w = v ^ kMuWait;
+  const uintptr_t w = static_cast<uintptr_t>(v ^ kMuWait);
   // By flipping that bit, we can now test for:
   //   kMuWriter and kMuReader in w
   //   kMuWrWait and kMuWait in w
@@ -1927,9 +1968,10 @@ void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
     CheckForMutexCorruption(v, "Lock");
     if ((v & waitp->how->slow_need_zero) == 0) {
       if (mu_.compare_exchange_strong(
-              v, (waitp->how->fast_or |
-                  (v & zap_desig_waker[flags & kMuHasBlocked])) +
-                     waitp->how->fast_add,
+              v,
+              (waitp->how->fast_or |
+               (v & ClearDesignatedWakerMask(flags & kMuHasBlocked))) +
+                  waitp->how->fast_add,
               std::memory_order_acquire, std::memory_order_relaxed)) {
         if (waitp->cond == nullptr ||
             EvalConditionAnnotated(waitp->cond, this, true, false,
@@ -1946,8 +1988,9 @@ void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
       if ((v & (kMuSpin|kMuWait)) == 0) {   // no waiters
         // This thread tries to become the one and only waiter.
         PerThreadSynch *new_h = Enqueue(nullptr, waitp, v, flags);
-        intptr_t nv = (v & zap_desig_waker[flags & kMuHasBlocked] & kMuLow) |
-                      kMuWait;
+        intptr_t nv =
+            (v & ClearDesignatedWakerMask(flags & kMuHasBlocked) & kMuLow) |
+            kMuWait;
         ABSL_RAW_CHECK(new_h != nullptr, "Enqueue to empty list failed");
         if (waitp->how == kExclusive && (v & kMuReader) != 0) {
           nv |= kMuWrWait;
@@ -1961,12 +2004,13 @@ void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
           waitp->thread->waitp = nullptr;
         }
       } else if ((v & waitp->how->slow_inc_need_zero &
-                  ignore_waiting_writers[flags & kMuHasBlocked]) == 0) {
+                  IgnoreWaitingWritersMask(flags & kMuHasBlocked)) == 0) {
         // This is a reader that needs to increment the reader count,
         // but the count is currently held in the last waiter.
         if (mu_.compare_exchange_strong(
-                v, (v & zap_desig_waker[flags & kMuHasBlocked]) | kMuSpin |
-                       kMuReader,
+                v,
+                (v & ClearDesignatedWakerMask(flags & kMuHasBlocked)) |
+                    kMuSpin | kMuReader,
                 std::memory_order_acquire, std::memory_order_relaxed)) {
           PerThreadSynch *h = GetPerThreadSynch(v);
           h->readers += kMuOne;       // inc reader count in waiter
@@ -1987,8 +2031,9 @@ void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
         }
       } else if ((v & kMuSpin) == 0 &&  // attempt to queue ourselves
                  mu_.compare_exchange_strong(
-                     v, (v & zap_desig_waker[flags & kMuHasBlocked]) | kMuSpin |
-                            kMuWait,
+                     v,
+                     (v & ClearDesignatedWakerMask(flags & kMuHasBlocked)) |
+                         kMuSpin | kMuWait,
                      std::memory_order_acquire, std::memory_order_relaxed)) {
         PerThreadSynch *h = GetPerThreadSynch(v);
         PerThreadSynch *new_h = Enqueue(h, waitp, v, flags);
@@ -2315,19 +2360,26 @@ ABSL_ATTRIBUTE_NOINLINE void Mutex::UnlockSlow(SynchWaitParams *waitp) {
   }                            // end of for(;;)-loop
 
   if (wake_list != kPerThreadSynchNull) {
-    int64_t enqueue_timestamp = wake_list->waitp->contention_start_cycles;
-    bool cond_waiter = wake_list->cond_waiter;
+    int64_t total_wait_cycles = 0;
+    int64_t max_wait_cycles = 0;
+    int64_t now = base_internal::CycleClock::Now();
     do {
+      // Profile lock contention events only if the waiter was trying to acquire
+      // the lock, not waiting on a condition variable or Condition.
+      if (!wake_list->cond_waiter) {
+        int64_t cycles_waited =
+            (now - wake_list->waitp->contention_start_cycles);
+        total_wait_cycles += cycles_waited;
+        if (max_wait_cycles == 0) max_wait_cycles = cycles_waited;
+        wake_list->waitp->contention_start_cycles = now;
+        wake_list->waitp->should_submit_contention_data = true;
+      }
       wake_list = Wakeup(wake_list);              // wake waiters
     } while (wake_list != kPerThreadSynchNull);
-    if (!cond_waiter) {
-      // Sample lock contention events only if the (first) waiter was trying to
-      // acquire the lock, not waiting on a condition variable or Condition.
-      int64_t wait_cycles =
-          base_internal::CycleClock::Now() - enqueue_timestamp;
-      mutex_tracer("slow release", this, wait_cycles);
+    if (total_wait_cycles > 0) {
+      mutex_tracer("slow release", this, total_wait_cycles);
       ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0);
-      submit_profile_data(enqueue_timestamp);
+      submit_profile_data(total_wait_cycles);
       ABSL_TSAN_MUTEX_POST_DIVERT(this, 0);
     }
   }
@@ -2492,9 +2544,9 @@ void CondVar::Remove(PerThreadSynch *s) {
 // before calling Mutex::UnlockSlow(), the Mutex code might be re-entered (via
 // the logging code, or via a Condition function) and might potentially attempt
 // to block this thread.  That would be a problem if the thread were already on
-// a the condition variable waiter queue.  Thus, we use the waitp->cv_word
-// to tell the unlock code to call CondVarEnqueue() to queue the thread on the
-// condition variable queue just before the mutex is to be unlocked, and (most
+// a condition variable waiter queue.  Thus, we use the waitp->cv_word to tell
+// the unlock code to call CondVarEnqueue() to queue the thread on the condition
+// variable queue just before the mutex is to be unlocked, and (most
 // importantly) after any call to an external routine that might re-enter the
 // mutex code.
 static void CondVarEnqueue(SynchWaitParams *waitp) {
@@ -2557,6 +2609,23 @@ bool CondVar::WaitCommon(Mutex *mutex, KernelTimeout t) {
   while (waitp.thread->state.load(std::memory_order_acquire) ==
          PerThreadSynch::kQueued) {
     if (!Mutex::DecrementSynchSem(mutex, waitp.thread, t)) {
+      // DecrementSynchSem returned due to timeout.
+      // Now we will either (1) remove ourselves from the wait list in Remove
+      // below, in which case Remove will set thread.state = kAvailable and
+      // we will not call DecrementSynchSem again; or (2) Signal/SignalAll
+      // has removed us concurrently and is calling Wakeup, which will set
+      // thread.state = kAvailable and post to the semaphore.
+      // It's important to reset the timeout for the case (2) because otherwise
+      // we can live-lock in this loop since DecrementSynchSem will always
+      // return immediately due to timeout, but Signal/SignalAll is not
+      // necessary set thread.state = kAvailable yet (and is not scheduled
+      // due to thread priorities or other scheduler artifacts).
+      // Note this could also be resolved if Signal/SignalAll would set
+      // thread.state = kAvailable while holding the wait list spin lock.
+      // But this can't be easily done for SignalAll since it grabs the whole
+      // wait list with a single compare-exchange and does not really grab
+      // the spin lock.
+      t = KernelTimeout::Never();
       this->Remove(waitp.thread);
       rc = true;
     }
diff --git a/third_party/abseil-cpp/absl/synchronization/mutex.h b/third_party/abseil-cpp/absl/synchronization/mutex.h
index 38338f24df..8694bb7576 100644
--- a/third_party/abseil-cpp/absl/synchronization/mutex.h
+++ b/third_party/abseil-cpp/absl/synchronization/mutex.h
@@ -174,9 +174,12 @@ class ABSL_LOCKABLE Mutex {
 
   // Mutex::AssertHeld()
   //
-  // Return immediately if this thread holds the `Mutex` exclusively (in write
-  // mode). Otherwise, may report an error (typically by crashing with a
-  // diagnostic), or may return immediately.
+  // Require that the mutex be held exclusively (write mode) by this thread.
+  //
+  // If the mutex is not currently held by this thread, this function may report
+  // an error (typically by crashing with a diagnostic) or it may do nothing.
+  // This function is intended only as a tool to assist debugging; it doesn't
+  // guarantee correctness.
   void AssertHeld() const ABSL_ASSERT_EXCLUSIVE_LOCK();
 
   // ---------------------------------------------------------------------------
@@ -236,9 +239,13 @@ class ABSL_LOCKABLE Mutex {
 
   // Mutex::AssertReaderHeld()
   //
-  // Returns immediately if this thread holds the `Mutex` in at least shared
-  // mode (read mode). Otherwise, may report an error (typically by
-  // crashing with a diagnostic), or may return immediately.
+  // Require that the mutex be held at least in shared mode (read mode) by this
+  // thread.
+  //
+  // If the mutex is not currently held by this thread, this function may report
+  // an error (typically by crashing with a diagnostic) or it may do nothing.
+  // This function is intended only as a tool to assist debugging; it doesn't
+  // guarantee correctness.
   void AssertReaderHeld() const ABSL_ASSERT_SHARED_LOCK();
 
   // Mutex::WriterLock()
@@ -981,17 +988,18 @@ inline Condition::Condition(const T *object,
       method_(reinterpret_cast<InternalMethodType>(method)),
       arg_(reinterpret_cast<void *>(const_cast<T *>(object))) {}
 
-// Register a hook for profiling support.
+// Register hooks for profiling support.
 //
 // The function pointer registered here will be called whenever a mutex is
-// contended.  The callback is given the absl/base/cycleclock.h timestamp when
-// waiting began.
+// contended.  The callback is given the cycles for which waiting happened (as
+// measured by //absl/base/internal/cycleclock.h, and which may not
+// be real "cycle" counts.)
 //
 // Calls to this function do not race or block, but there is no ordering
 // guaranteed between calls to this function and call to the provided hook.
 // In particular, the previously registered hook may still be called for some
 // time after this function returns.
-void RegisterMutexProfiler(void (*fn)(int64_t wait_timestamp));
+void RegisterMutexProfiler(void (*fn)(int64_t wait_cycles));
 
 // Register a hook for Mutex tracing.
 //
diff --git a/third_party/abseil-cpp/absl/synchronization/mutex_test.cc b/third_party/abseil-cpp/absl/synchronization/mutex_test.cc
index 4f40317684..99bb017508 100644
--- a/third_party/abseil-cpp/absl/synchronization/mutex_test.cc
+++ b/third_party/abseil-cpp/absl/synchronization/mutex_test.cc
@@ -1704,4 +1704,30 @@ TEST(Mutex, MuTime) {
   EXPECT_EQ(RunTest(&TestMuTime, threads, iterations, 1), threads * iterations);
 }
 
+TEST(Mutex, SignalExitedThread) {
+  // The test may expose a race when Mutex::Unlock signals a thread
+  // that has already exited.
+#if defined(__wasm__) || defined(__asmjs__)
+  constexpr int kThreads = 1;  // OOMs under WASM
+#else
+  constexpr int kThreads = 100;
+#endif
+  std::vector<std::thread> top;
+  for (unsigned i = 0; i < 2 * std::thread::hardware_concurrency(); i++) {
+    top.emplace_back([&]() {
+      for (int i = 0; i < kThreads; i++) {
+        absl::Mutex mu;
+        std::thread t([&]() {
+          mu.Lock();
+          mu.Unlock();
+        });
+        mu.Lock();
+        mu.Unlock();
+        t.join();
+      }
+    });
+  }
+  for (auto &th : top) th.join();
+}
+
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/synchronization/notification.cc b/third_party/abseil-cpp/absl/synchronization/notification.cc
index e91b903822..165ba669fb 100644
--- a/third_party/abseil-cpp/absl/synchronization/notification.cc
+++ b/third_party/abseil-cpp/absl/synchronization/notification.cc
@@ -16,7 +16,6 @@
 
 #include <atomic>
 
-#include "absl/base/attributes.h"
 #include "absl/base/internal/raw_logging.h"
 #include "absl/synchronization/mutex.h"
 #include "absl/time/time.h"
diff --git a/third_party/abseil-cpp/absl/synchronization/notification.h b/third_party/abseil-cpp/absl/synchronization/notification.h
index 9a354ca2c0..8986d9a408 100644
--- a/third_party/abseil-cpp/absl/synchronization/notification.h
+++ b/third_party/abseil-cpp/absl/synchronization/notification.h
@@ -22,7 +22,7 @@
 // The `Notification` object maintains a private boolean "notified" state that
 // transitions to `true` at most once. The `Notification` class provides the
 // following primary member functions:
-//   * `HasBeenNotified() `to query its state
+//   * `HasBeenNotified()` to query its state
 //   * `WaitForNotification*()` to have threads wait until the "notified" state
 //      is `true`.
 //   * `Notify()` to set the notification's "notified" state to `true` and
@@ -52,7 +52,7 @@
 
 #include <atomic>
 
-#include "absl/base/macros.h"
+#include "absl/base/attributes.h"
 #include "absl/synchronization/mutex.h"
 #include "absl/time/time.h"
 
@@ -74,7 +74,7 @@ class Notification {
   // Notification::HasBeenNotified()
   //
   // Returns the value of the notification's internal "notified" state.
-  bool HasBeenNotified() const {
+  ABSL_MUST_USE_RESULT bool HasBeenNotified() const {
     return HasBeenNotifiedInternal(&this->notified_yet_);
   }
 
diff --git a/third_party/abseil-cpp/absl/time/BUILD.bazel b/third_party/abseil-cpp/absl/time/BUILD.bazel
index e8c49660b2..b5f039807d 100644
--- a/third_party/abseil-cpp/absl/time/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/time/BUILD.bazel
@@ -45,12 +45,14 @@ cc_library(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base",
+        "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/base:raw_logging_internal",
         "//absl/numeric:int128",
         "//absl/strings",
         "//absl/time/internal/cctz:civil_time",
         "//absl/time/internal/cctz:time_zone",
+        "//absl/types:optional",
     ],
 )
 
@@ -64,9 +66,7 @@ cc_library(
     hdrs = ["internal/test_util.h"],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/time:__pkg__",
-    ],
+    visibility = ["//visibility:private"],
     deps = [
         ":time",
         "//absl/base:config",
@@ -100,6 +100,30 @@ cc_test(
 )
 
 cc_test(
+    name = "flag_test",
+    srcs = [
+        "flag_test.cc",
+    ],
+    copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    tags = [
+        "no_test_android_arm",
+        "no_test_android_arm64",
+        "no_test_android_x86",
+        "no_test_ios_x86_64",
+        "no_test_loonix",
+        "no_test_msvc_x64",
+        "no_test_wasm",
+    ],
+    deps = [
+        ":time",
+        "//absl/flags:flag",
+        "//absl/flags:reflection",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
     name = "time_benchmark",
     srcs = [
         "civil_time_benchmark.cc",
diff --git a/third_party/abseil-cpp/absl/time/BUILD.gn b/third_party/abseil-cpp/absl/time/BUILD.gn
new file mode 100644
index 0000000000..be037e6465
--- /dev/null
+++ b/third_party/abseil-cpp/absl/time/BUILD.gn
@@ -0,0 +1,51 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("time") {
+  sources = [
+    "civil_time.cc",
+    "clock.cc",
+    "duration.cc",
+    "format.cc",
+    "internal/get_current_time_chrono.inc",
+    "internal/get_current_time_posix.inc",
+    "time.cc",
+  ]
+  public = [
+    "civil_time.h",
+    "clock.h",
+    "time.h",
+  ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/numeric:int128",
+    "//third_party/abseil-cpp/absl/strings",
+    "//third_party/abseil-cpp/absl/time/internal/cctz:civil_time",
+    "//third_party/abseil-cpp/absl/time/internal/cctz:time_zone",
+    "//third_party/abseil-cpp/absl/types:optional",
+  ]
+}
+
+absl_source_set("test_util") {
+  testonly = true
+  sources = [
+    "internal/test_util.cc",
+    "internal/zoneinfo.inc",
+  ]
+  public = [ "internal/test_util.h" ]
+  deps = [
+    ":time",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/time/internal/cctz:time_zone",
+    "//third_party/googletest:gmock",
+    "//third_party/googletest:gtest",
+  ]
+  visibility = [ ":*" ]
+}
diff --git a/third_party/abseil-cpp/absl/time/CMakeLists.txt b/third_party/abseil-cpp/absl/time/CMakeLists.txt
index f6ff8bd127..1580a30318 100644
--- a/third_party/abseil-cpp/absl/time/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/time/CMakeLists.txt
@@ -87,6 +87,7 @@ absl_cc_library(
     $<$<PLATFORM_ID:Darwin>:${CoreFoundation}>
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     time_internal_test_util
@@ -126,3 +127,16 @@ absl_cc_test(
     absl::time_zone
     GTest::gmock_main
 )
+
+absl_cc_test(
+  NAME
+    flag_test
+  SRCS
+    "flag_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
+  DEPS
+    absl::flags
+    absl::flags_reflection
+    GTest::gmock_main
+)
diff --git a/third_party/abseil-cpp/absl/time/civil_time.cc b/third_party/abseil-cpp/absl/time/civil_time.cc
index 6a231edb2d..65df39d731 100644
--- a/third_party/abseil-cpp/absl/time/civil_time.cc
+++ b/third_party/abseil-cpp/absl/time/civil_time.cc
@@ -15,6 +15,7 @@
 #include "absl/time/civil_time.h"
 
 #include <cstdlib>
+#include <ostream>
 #include <string>
 
 #include "absl/strings/str_cat.h"
@@ -167,6 +168,31 @@ std::ostream& operator<<(std::ostream& os, CivilSecond s) {
   return os << FormatCivilTime(s);
 }
 
+bool AbslParseFlag(string_view s, CivilSecond* c, std::string*) {
+  return ParseLenientCivilTime(s, c);
+}
+bool AbslParseFlag(string_view s, CivilMinute* c, std::string*) {
+  return ParseLenientCivilTime(s, c);
+}
+bool AbslParseFlag(string_view s, CivilHour* c, std::string*) {
+  return ParseLenientCivilTime(s, c);
+}
+bool AbslParseFlag(string_view s, CivilDay* c, std::string*) {
+  return ParseLenientCivilTime(s, c);
+}
+bool AbslParseFlag(string_view s, CivilMonth* c, std::string*) {
+  return ParseLenientCivilTime(s, c);
+}
+bool AbslParseFlag(string_view s, CivilYear* c, std::string*) {
+  return ParseLenientCivilTime(s, c);
+}
+std::string AbslUnparseFlag(CivilSecond c) { return FormatCivilTime(c); }
+std::string AbslUnparseFlag(CivilMinute c) { return FormatCivilTime(c); }
+std::string AbslUnparseFlag(CivilHour c) { return FormatCivilTime(c); }
+std::string AbslUnparseFlag(CivilDay c) { return FormatCivilTime(c); }
+std::string AbslUnparseFlag(CivilMonth c) { return FormatCivilTime(c); }
+std::string AbslUnparseFlag(CivilYear c) { return FormatCivilTime(c); }
+
 }  // namespace time_internal
 
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/time/civil_time.h b/third_party/abseil-cpp/absl/time/civil_time.h
index bb46004434..5855bc73a1 100644
--- a/third_party/abseil-cpp/absl/time/civil_time.h
+++ b/third_party/abseil-cpp/absl/time/civil_time.h
@@ -70,8 +70,10 @@
 #ifndef ABSL_TIME_CIVIL_TIME_H_
 #define ABSL_TIME_CIVIL_TIME_H_
 
+#include <iosfwd>
 #include <string>
 
+#include "absl/base/config.h"
 #include "absl/strings/string_view.h"
 #include "absl/time/internal/cctz/include/cctz/civil_time.h"
 
@@ -530,6 +532,29 @@ std::ostream& operator<<(std::ostream& os, CivilHour h);
 std::ostream& operator<<(std::ostream& os, CivilMinute m);
 std::ostream& operator<<(std::ostream& os, CivilSecond s);
 
+// AbslParseFlag()
+//
+// Parses the command-line flag string representation `s` into a civil-time
+// value. Flags must be specified in a format that is valid for
+// `absl::ParseLenientCivilTime()`.
+bool AbslParseFlag(absl::string_view s, CivilSecond* c, std::string* error);
+bool AbslParseFlag(absl::string_view s, CivilMinute* c, std::string* error);
+bool AbslParseFlag(absl::string_view s, CivilHour* c, std::string* error);
+bool AbslParseFlag(absl::string_view s, CivilDay* c, std::string* error);
+bool AbslParseFlag(absl::string_view s, CivilMonth* c, std::string* error);
+bool AbslParseFlag(absl::string_view s, CivilYear* c, std::string* error);
+
+// AbslUnparseFlag()
+//
+// Unparses a civil-time value into a command-line string representation using
+// the format specified by `absl::ParseCivilTime()`.
+std::string AbslUnparseFlag(CivilSecond c);
+std::string AbslUnparseFlag(CivilMinute c);
+std::string AbslUnparseFlag(CivilHour c);
+std::string AbslUnparseFlag(CivilDay c);
+std::string AbslUnparseFlag(CivilMonth c);
+std::string AbslUnparseFlag(CivilYear c);
+
 }  // namespace time_internal
 
 ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/absl/time/clock.cc b/third_party/abseil-cpp/absl/time/clock.cc
index 7b204c4ee0..2bf53d9c61 100644
--- a/third_party/abseil-cpp/absl/time/clock.cc
+++ b/third_party/abseil-cpp/absl/time/clock.cc
@@ -196,7 +196,7 @@ struct ABSL_CACHELINE_ALIGNED TimeState {
   absl::base_internal::SpinLock lock{absl::kConstInit,
                                      base_internal::SCHEDULE_KERNEL_ONLY};
 };
-ABSL_CONST_INIT static TimeState time_state{};
+ABSL_CONST_INIT static TimeState time_state;
 
 // Return the time in ns as told by the kernel interface.  Place in *cycleclock
 // the value of the cycleclock at about the time of the syscall.
@@ -217,9 +217,11 @@ static int64_t GetCurrentTimeNanosFromKernel(uint64_t last_cycleclock,
   uint64_t elapsed_cycles;
   int loops = 0;
   do {
-    before_cycles = GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW();
+    before_cycles =
+        static_cast<uint64_t>(GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW());
     current_time_nanos_from_system = GET_CURRENT_TIME_NANOS_FROM_SYSTEM();
-    after_cycles = GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW();
+    after_cycles =
+        static_cast<uint64_t>(GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW());
     // elapsed_cycles is unsigned, so is large on overflow
     elapsed_cycles = after_cycles - before_cycles;
     if (elapsed_cycles >= local_approx_syscall_time_in_cycles &&
@@ -316,7 +318,8 @@ int64_t GetCurrentTimeNanos() {
   // contribute to register pressure - reading it early before initializing
   // the other pieces of the calculation minimizes spill/restore instructions,
   // minimizing icache cost.
-  uint64_t now_cycles = GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW();
+  uint64_t now_cycles =
+      static_cast<uint64_t>(GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW());
 
   // Acquire pairs with the barrier in SeqRelease - if this load sees that
   // store, the shared-data reads necessarily see that SeqRelease's updates
@@ -356,7 +359,8 @@ int64_t GetCurrentTimeNanos() {
   uint64_t delta_cycles;
   if (seq_read0 == seq_read1 && (seq_read0 & 1) == 0 &&
       (delta_cycles = now_cycles - base_cycles) < min_cycles_per_sample) {
-    return base_ns + ((delta_cycles * nsscaled_per_cycle) >> kScale);
+    return static_cast<int64_t>(
+        base_ns + ((delta_cycles * nsscaled_per_cycle) >> kScale));
   }
   return GetCurrentTimeNanosSlowPath();
 }
@@ -404,8 +408,8 @@ static int64_t GetCurrentTimeNanosSlowPath()
   // Sample the kernel time base.  This is the definition of
   // "now" if we take the slow path.
   uint64_t now_cycles;
-  uint64_t now_ns =
-      GetCurrentTimeNanosFromKernel(time_state.last_now_cycles, &now_cycles);
+  uint64_t now_ns = static_cast<uint64_t>(
+      GetCurrentTimeNanosFromKernel(time_state.last_now_cycles, &now_cycles));
   time_state.last_now_cycles = now_cycles;
 
   uint64_t estimated_base_ns;
@@ -432,7 +436,7 @@ static int64_t GetCurrentTimeNanosSlowPath()
 
   time_state.lock.Unlock();
 
-  return estimated_base_ns;
+  return static_cast<int64_t>(estimated_base_ns);
 }
 
 // Main part of the algorithm.  Locks out readers, updates the approximation
@@ -489,7 +493,8 @@ static uint64_t UpdateLastSample(uint64_t now_cycles, uint64_t now_ns,
     uint64_t assumed_next_sample_delta_cycles =
         SafeDivideAndScale(kMinNSBetweenSamples, measured_nsscaled_per_cycle);
 
-    int64_t diff_ns = now_ns - estimated_base_ns;  // estimate low by this much
+    // Estimate low by this much.
+    int64_t diff_ns = static_cast<int64_t>(now_ns - estimated_base_ns);
 
     // We want to set nsscaled_per_cycle so that our estimate of the ns time
     // at the assumed cycle time is the assumed ns time.
@@ -500,7 +505,8 @@ static uint64_t UpdateLastSample(uint64_t now_cycles, uint64_t now_ns,
     // of our current error, by solving:
     //  kMinNSBetweenSamples + diff_ns - (diff_ns / 16) ==
     //  (assumed_next_sample_delta_cycles * nsscaled_per_cycle) >> kScale
-    ns = kMinNSBetweenSamples + diff_ns - (diff_ns / 16);
+    ns = static_cast<uint64_t>(static_cast<int64_t>(kMinNSBetweenSamples) +
+                               diff_ns - (diff_ns / 16));
     uint64_t new_nsscaled_per_cycle =
         SafeDivideAndScale(ns, assumed_next_sample_delta_cycles);
     if (new_nsscaled_per_cycle != 0 &&
@@ -558,7 +564,7 @@ constexpr absl::Duration MaxSleep() {
 // REQUIRES: to_sleep <= MaxSleep().
 void SleepOnce(absl::Duration to_sleep) {
 #ifdef _WIN32
-  Sleep(to_sleep / absl::Milliseconds(1));
+  Sleep(static_cast<DWORD>(to_sleep / absl::Milliseconds(1)));
 #else
   struct timespec sleep_time = absl::ToTimespec(to_sleep);
   while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR) {
diff --git a/third_party/abseil-cpp/absl/time/duration.cc b/third_party/abseil-cpp/absl/time/duration.cc
index 4443109a51..911e80f834 100644
--- a/third_party/abseil-cpp/absl/time/duration.cc
+++ b/third_party/abseil-cpp/absl/time/duration.cc
@@ -617,7 +617,7 @@ timespec ToTimespec(Duration d) {
         rep_lo -= kTicksPerSecond;
       }
     }
-    ts.tv_sec = rep_hi;
+    ts.tv_sec = static_cast<decltype(ts.tv_sec)>(rep_hi);
     if (ts.tv_sec == rep_hi) {  // no time_t narrowing
       ts.tv_nsec = rep_lo / kTicksPerNanosecond;
       return ts;
@@ -645,7 +645,7 @@ timeval ToTimeval(Duration d) {
       ts.tv_nsec -= 1000 * 1000 * 1000;
     }
   }
-  tv.tv_sec = ts.tv_sec;
+  tv.tv_sec = static_cast<decltype(tv.tv_sec)>(ts.tv_sec);
   if (tv.tv_sec != ts.tv_sec) {  // narrowing
     if (ts.tv_sec < 0) {
       tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::min();
@@ -691,7 +691,7 @@ namespace {
 char* Format64(char* ep, int width, int64_t v) {
   do {
     --width;
-    *--ep = '0' + (v % 10);  // contiguous digits
+    *--ep = static_cast<char>('0' + (v % 10));  // contiguous digits
   } while (v /= 10);
   while (--width >= 0) *--ep = '0';  // zero pad
   return ep;
@@ -728,7 +728,7 @@ void AppendNumberUnit(std::string* out, int64_t n, DisplayUnit unit) {
   char* const ep = buf + sizeof(buf);
   char* bp = Format64(ep, 0, n);
   if (*bp != '0' || bp + 1 != ep) {
-    out->append(bp, ep - bp);
+    out->append(bp, static_cast<size_t>(ep - bp));
     out->append(unit.abbr.data(), unit.abbr.size());
   }
 }
@@ -745,12 +745,12 @@ void AppendNumberUnit(std::string* out, double n, DisplayUnit unit) {
   int64_t int_part = d;
   if (int_part != 0 || frac_part != 0) {
     char* bp = Format64(ep, 0, int_part);  // always < 1000
-    out->append(bp, ep - bp);
+    out->append(bp, static_cast<size_t>(ep - bp));
     if (frac_part != 0) {
       out->push_back('.');
       bp = Format64(ep, prec, frac_part);
       while (ep[-1] == '0') --ep;
-      out->append(bp, ep - bp);
+      out->append(bp, static_cast<size_t>(ep - bp));
     }
     out->append(unit.abbr.data(), unit.abbr.size());
   }
@@ -766,13 +766,14 @@ void AppendNumberUnit(std::string* out, double n, DisplayUnit unit) {
 //   is non-zero.
 // Unlike Go, we format the zero duration as 0, with no unit.
 std::string FormatDuration(Duration d) {
-  const Duration min_duration = Seconds(kint64min);
-  if (d == min_duration) {
+  constexpr Duration kMinDuration = Seconds(kint64min);
+  std::string s;
+  if (d == kMinDuration) {
     // Avoid needing to negate kint64min by directly returning what the
     // following code should produce in that case.
-    return "-2562047788015215h30m8s";
+    s = "-2562047788015215h30m8s";
+    return s;
   }
-  std::string s;
   if (d < ZeroDuration()) {
     s.append("-");
     d = -d;
@@ -840,7 +841,7 @@ bool ConsumeDurationNumber(const char** dpp, const char* ep, int64_t* int_part,
 // in "*unit".  The given string pointer is modified to point to the first
 // unconsumed char.
 bool ConsumeDurationUnit(const char** start, const char* end, Duration* unit) {
-  size_t size = end - *start;
+  size_t size = static_cast<size_t>(end - *start);
   switch (size) {
     case 0:
       return false;
diff --git a/third_party/abseil-cpp/absl/time/duration_test.cc b/third_party/abseil-cpp/absl/time/duration_test.cc
index b7209e1c0a..b7abf4baa2 100644
--- a/third_party/abseil-cpp/absl/time/duration_test.cc
+++ b/third_party/abseil-cpp/absl/time/duration_test.cc
@@ -349,6 +349,11 @@ TEST(Duration, ToChrono) {
 }
 
 TEST(Duration, FactoryOverloads) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
   enum E { kOne = 1 };
 #define TEST_FACTORY_OVERLOADS(NAME)                                          \
   EXPECT_EQ(1, NAME(kOne) / NAME(kOne));                                      \
@@ -879,6 +884,11 @@ TEST(Duration, RelationalOperators) {
 }
 
 TEST(Duration, Addition) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
 #define TEST_ADD_OPS(UNIT)                  \
   do {                                      \
     EXPECT_EQ(UNIT(2), UNIT(1) + UNIT(1));  \
@@ -972,6 +982,11 @@ TEST(Duration, Negation) {
 }
 
 TEST(Duration, AbsoluteValue) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
   EXPECT_EQ(absl::ZeroDuration(), AbsDuration(absl::ZeroDuration()));
   EXPECT_EQ(absl::Seconds(1), AbsDuration(absl::Seconds(1)));
   EXPECT_EQ(absl::Seconds(1), AbsDuration(absl::Seconds(-1)));
@@ -989,6 +1004,11 @@ TEST(Duration, AbsoluteValue) {
 }
 
 TEST(Duration, Multiplication) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
 #define TEST_MUL_OPS(UNIT)                                    \
   do {                                                        \
     EXPECT_EQ(UNIT(5), UNIT(2) * 2.5);                        \
@@ -1241,6 +1261,11 @@ TEST(Duration, RoundTripUnits) {
 }
 
 TEST(Duration, TruncConversions) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
   // Tests ToTimespec()/DurationFromTimespec()
   const struct {
     absl::Duration d;
@@ -1537,6 +1562,11 @@ TEST(Duration, ConversionSaturation) {
 }
 
 TEST(Duration, FormatDuration) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
   // Example from Go's docs.
   EXPECT_EQ("72h3m0.5s",
             absl::FormatDuration(absl::Hours(72) + absl::Minutes(3) +
@@ -1671,6 +1701,11 @@ TEST(Duration, FormatDuration) {
 }
 
 TEST(Duration, ParseDuration) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
   absl::Duration d;
 
   // No specified unit. Should only work for zero and infinity.
diff --git a/third_party/abseil-cpp/absl/time/flag_test.cc b/third_party/abseil-cpp/absl/time/flag_test.cc
new file mode 100644
index 0000000000..8f8532b7eb
--- /dev/null
+++ b/third_party/abseil-cpp/absl/time/flag_test.cc
@@ -0,0 +1,147 @@
+// Copyright 2018 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/flags/flag.h"
+
+#include <string>
+
+#include "gtest/gtest.h"
+#include "absl/flags/reflection.h"
+#include "absl/time/civil_time.h"
+#include "absl/time/time.h"
+
+ABSL_FLAG(absl::CivilSecond, test_flag_civil_second,
+          absl::CivilSecond(2015, 1, 2, 3, 4, 5), "");
+ABSL_FLAG(absl::CivilMinute, test_flag_civil_minute,
+          absl::CivilMinute(2015, 1, 2, 3, 4), "");
+ABSL_FLAG(absl::CivilHour, test_flag_civil_hour, absl::CivilHour(2015, 1, 2, 3),
+          "");
+ABSL_FLAG(absl::CivilDay, test_flag_civil_day, absl::CivilDay(2015, 1, 2), "");
+ABSL_FLAG(absl::CivilMonth, test_flag_civil_month, absl::CivilMonth(2015, 1),
+          "");
+ABSL_FLAG(absl::CivilYear, test_flag_civil_year, absl::CivilYear(2015), "");
+
+ABSL_FLAG(absl::Duration, test_duration_flag, absl::Seconds(5),
+          "For testing support for Duration flags");
+ABSL_FLAG(absl::Time, test_time_flag, absl::InfinitePast(),
+          "For testing support for Time flags");
+
+namespace {
+
+bool SetFlagValue(absl::string_view flag_name, absl::string_view value) {
+  auto* flag = absl::FindCommandLineFlag(flag_name);
+  if (!flag) return false;
+  std::string err;
+  return flag->ParseFrom(value, &err);
+}
+
+bool GetFlagValue(absl::string_view flag_name, std::string& value) {
+  auto* flag = absl::FindCommandLineFlag(flag_name);
+  if (!flag) return false;
+  value = flag->CurrentValue();
+  return true;
+}
+
+TEST(CivilTime, FlagSupport) {
+  // Tests the default setting of the flags.
+  const absl::CivilSecond kDefaultSec(2015, 1, 2, 3, 4, 5);
+  EXPECT_EQ(absl::CivilSecond(kDefaultSec),
+            absl::GetFlag(FLAGS_test_flag_civil_second));
+  EXPECT_EQ(absl::CivilMinute(kDefaultSec),
+            absl::GetFlag(FLAGS_test_flag_civil_minute));
+  EXPECT_EQ(absl::CivilHour(kDefaultSec),
+            absl::GetFlag(FLAGS_test_flag_civil_hour));
+  EXPECT_EQ(absl::CivilDay(kDefaultSec),
+            absl::GetFlag(FLAGS_test_flag_civil_day));
+  EXPECT_EQ(absl::CivilMonth(kDefaultSec),
+            absl::GetFlag(FLAGS_test_flag_civil_month));
+  EXPECT_EQ(absl::CivilYear(kDefaultSec),
+            absl::GetFlag(FLAGS_test_flag_civil_year));
+
+  // Sets flags to a new value.
+  const absl::CivilSecond kNewSec(2016, 6, 7, 8, 9, 10);
+  absl::SetFlag(&FLAGS_test_flag_civil_second, absl::CivilSecond(kNewSec));
+  absl::SetFlag(&FLAGS_test_flag_civil_minute, absl::CivilMinute(kNewSec));
+  absl::SetFlag(&FLAGS_test_flag_civil_hour, absl::CivilHour(kNewSec));
+  absl::SetFlag(&FLAGS_test_flag_civil_day, absl::CivilDay(kNewSec));
+  absl::SetFlag(&FLAGS_test_flag_civil_month, absl::CivilMonth(kNewSec));
+  absl::SetFlag(&FLAGS_test_flag_civil_year, absl::CivilYear(kNewSec));
+
+  EXPECT_EQ(absl::CivilSecond(kNewSec),
+            absl::GetFlag(FLAGS_test_flag_civil_second));
+  EXPECT_EQ(absl::CivilMinute(kNewSec),
+            absl::GetFlag(FLAGS_test_flag_civil_minute));
+  EXPECT_EQ(absl::CivilHour(kNewSec),
+            absl::GetFlag(FLAGS_test_flag_civil_hour));
+  EXPECT_EQ(absl::CivilDay(kNewSec), absl::GetFlag(FLAGS_test_flag_civil_day));
+  EXPECT_EQ(absl::CivilMonth(kNewSec),
+            absl::GetFlag(FLAGS_test_flag_civil_month));
+  EXPECT_EQ(absl::CivilYear(kNewSec),
+            absl::GetFlag(FLAGS_test_flag_civil_year));
+}
+
+TEST(Duration, FlagSupport) {
+  EXPECT_EQ(absl::Seconds(5), absl::GetFlag(FLAGS_test_duration_flag));
+
+  absl::SetFlag(&FLAGS_test_duration_flag, absl::Seconds(10));
+  EXPECT_EQ(absl::Seconds(10), absl::GetFlag(FLAGS_test_duration_flag));
+
+  EXPECT_TRUE(SetFlagValue("test_duration_flag", "20s"));
+  EXPECT_EQ(absl::Seconds(20), absl::GetFlag(FLAGS_test_duration_flag));
+
+  std::string current_flag_value;
+  EXPECT_TRUE(GetFlagValue("test_duration_flag", current_flag_value));
+  EXPECT_EQ("20s", current_flag_value);
+}
+
+TEST(Time, FlagSupport) {
+  EXPECT_EQ(absl::InfinitePast(), absl::GetFlag(FLAGS_test_time_flag));
+
+  const absl::Time t = absl::FromCivil(absl::CivilSecond(2016, 1, 2, 3, 4, 5),
+                                       absl::UTCTimeZone());
+  absl::SetFlag(&FLAGS_test_time_flag, t);
+  EXPECT_EQ(t, absl::GetFlag(FLAGS_test_time_flag));
+
+  // Successful parse
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:06Z"));
+  EXPECT_EQ(t + absl::Seconds(1), absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:07.0Z"));
+  EXPECT_EQ(t + absl::Seconds(2), absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:08.000Z"));
+  EXPECT_EQ(t + absl::Seconds(3), absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:09+00:00"));
+  EXPECT_EQ(t + absl::Seconds(4), absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:05.123+00:00"));
+  EXPECT_EQ(t + absl::Milliseconds(123), absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:05.123+08:00"));
+  EXPECT_EQ(t + absl::Milliseconds(123) - absl::Hours(8),
+            absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "infinite-future"));
+  EXPECT_EQ(absl::InfiniteFuture(), absl::GetFlag(FLAGS_test_time_flag));
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "infinite-past"));
+  EXPECT_EQ(absl::InfinitePast(), absl::GetFlag(FLAGS_test_time_flag));
+
+  EXPECT_FALSE(SetFlagValue("test_time_flag", "2016-01-02T03:04:06"));
+  EXPECT_FALSE(SetFlagValue("test_time_flag", "2016-01-02"));
+  EXPECT_FALSE(SetFlagValue("test_time_flag", "2016-01-02Z"));
+  EXPECT_FALSE(SetFlagValue("test_time_flag", "2016-01-02+00:00"));
+  EXPECT_FALSE(SetFlagValue("test_time_flag", "2016-99-99T03:04:06Z"));
+
+  EXPECT_TRUE(SetFlagValue("test_time_flag", "2016-01-02T03:04:05Z"));
+  std::string current_flag_value;
+  EXPECT_TRUE(GetFlagValue("test_time_flag", current_flag_value));
+  EXPECT_EQ("2016-01-02T03:04:05+00:00", current_flag_value);
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/absl/time/format.cc b/third_party/abseil-cpp/absl/time/format.cc
index 4005fb704c..15a26b14f7 100644
--- a/third_party/abseil-cpp/absl/time/format.cc
+++ b/third_party/abseil-cpp/absl/time/format.cc
@@ -64,7 +64,8 @@ cctz_parts Split(absl::Time t) {
 // details about rep_hi and rep_lo.
 absl::Time Join(const cctz_parts& parts) {
   const int64_t rep_hi = (parts.sec - unix_epoch()).count();
-  const uint32_t rep_lo = parts.fem.count() / (1000 * 1000 / 4);
+  const uint32_t rep_lo =
+      static_cast<uint32_t>(parts.fem.count() / (1000 * 1000 / 4));
   const auto d = time_internal::MakeDuration(rep_hi, rep_lo);
   return time_internal::FromUnixDuration(d);
 }
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.bazel b/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.bazel
index bdc2e3091c..7304d40d25 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.bazel
@@ -85,7 +85,11 @@ cc_library(
     deps = [
         ":civil_time",
         "//absl/base:config",
-    ],
+    ] + select(
+        {
+            "//conditions:default": [],
+        },
+    ),
 )
 
 ### tests
@@ -115,6 +119,7 @@ cc_test(
         "no_test_android_arm",
         "no_test_android_arm64",
         "no_test_android_x86",
+        "no_test_wasm",
     ],
     deps = [
         ":civil_time",
@@ -134,6 +139,7 @@ cc_test(
         "no_test_android_arm",
         "no_test_android_arm64",
         "no_test_android_x86",
+        "no_test_wasm",
     ],
     deps = [
         ":civil_time",
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.gn b/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.gn
new file mode 100644
index 0000000000..ad0da55a1d
--- /dev/null
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/BUILD.gn
@@ -0,0 +1,55 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("civil_time") {
+  sources = [ "src/civil_time_detail.cc" ]
+  public = [
+    "include/cctz/civil_time.h",
+    "include/cctz/civil_time_detail.h",
+  ]
+  deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("time_zone") {
+  sources = [
+    "src/time_zone_fixed.cc",
+    "src/time_zone_fixed.h",
+    "src/time_zone_format.cc",
+    "src/time_zone_if.cc",
+    "src/time_zone_if.h",
+    "src/time_zone_impl.cc",
+    "src/time_zone_impl.h",
+    "src/time_zone_info.cc",
+    "src/time_zone_info.h",
+    "src/time_zone_libc.cc",
+    "src/time_zone_libc.h",
+    "src/time_zone_lookup.cc",
+    "src/time_zone_posix.cc",
+    "src/time_zone_posix.h",
+    "src/tzfile.h",
+    "src/zone_info_source.cc",
+  ]
+  public = [
+    "include/cctz/time_zone.h",
+    "include/cctz/zone_info_source.h",
+  ]
+  if (is_apple) {
+    frameworks = [ "Foundation.framework" ]
+  }
+  deps = [
+    ":civil_time",
+    "//third_party/abseil-cpp/absl/base:config",
+  ]
+  if (is_fuchsia) {
+    deps += [
+      "//third_party/fuchsia-sdk/sdk/fidl/fuchsia.intl",
+      "//third_party/fuchsia-sdk/sdk/pkg/async",
+      "//third_party/fuchsia-sdk/sdk/pkg/async-loop-cpp",
+      "//third_party/fuchsia-sdk/sdk/pkg/sys_cpp",
+      "//third_party/fuchsia-sdk/sdk/pkg/zx",
+    ]
+  }
+}
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/third_party/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h
index 8aadde57ca..a5b084e6be 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h
@@ -84,14 +84,13 @@ CONSTEXPR_F bool is_leap_year(year_t y) noexcept {
   return y % 4 == 0 && (y % 100 != 0 || y % 400 == 0);
 }
 CONSTEXPR_F int year_index(year_t y, month_t m) noexcept {
-  return (static_cast<int>((y + (m > 2)) % 400) + 400) % 400;
+  const int yi = static_cast<int>((y + (m > 2)) % 400);
+  return yi < 0 ? yi + 400 : yi;
 }
-CONSTEXPR_F int days_per_century(year_t y, month_t m) noexcept {
-  const int yi = year_index(y, m);
+CONSTEXPR_F int days_per_century(int yi) noexcept {
   return 36524 + (yi == 0 || yi > 300);
 }
-CONSTEXPR_F int days_per_4years(year_t y, month_t m) noexcept {
-  const int yi = year_index(y, m);
+CONSTEXPR_F int days_per_4years(int yi) noexcept {
   return 1460 + (yi == 0 || yi > 300 || (yi - 1) % 100 < 96);
 }
 CONSTEXPR_F int days_per_year(year_t y, month_t m) noexcept {
@@ -133,17 +132,22 @@ CONSTEXPR_F fields n_day(year_t y, month_t m, diff_t d, diff_t cd, hour_t hh,
     }
   }
   if (d > 365) {
+    int yi = year_index(ey, m);  // Index into Gregorian 400 year cycle.
     for (;;) {
-      int n = days_per_century(ey, m);
+      int n = days_per_century(yi);
       if (d <= n) break;
       d -= n;
       ey += 100;
+      yi += 100;
+      if (yi >= 400) yi -= 400;
     }
     for (;;) {
-      int n = days_per_4years(ey, m);
+      int n = days_per_4years(yi);
       if (d <= n) break;
       d -= n;
       ey += 4;
+      yi += 4;
+      if (yi >= 400) yi -= 400;
     }
     for (;;) {
       int n = days_per_year(ey, m);
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc
index 6770ad6b97..c64f3801db 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc
@@ -554,6 +554,7 @@ const char* const kTimeZoneNames[] = {"Africa/Abidjan",
                                       "Europe/Kaliningrad",
                                       "Europe/Kiev",
                                       "Europe/Kirov",
+                                      "Europe/Kyiv",
                                       "Europe/Lisbon",
                                       "Europe/Ljubljana",
                                       "Europe/London",
@@ -593,6 +594,7 @@ const char* const kTimeZoneNames[] = {"Africa/Abidjan",
                                       "Europe/Zagreb",
                                       "Europe/Zaporozhye",
                                       "Europe/Zurich",
+                                      "Factory",
                                       "GB",
                                       "GB-Eire",
                                       "GMT",
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc
index d8cb047425..2e5f532911 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc
@@ -19,7 +19,7 @@
 #endif
 
 #if defined(HAS_STRPTIME) && HAS_STRPTIME
-#if !defined(_XOPEN_SOURCE)
+#if !defined(_XOPEN_SOURCE) && !defined(__OpenBSD__)
 #define _XOPEN_SOURCE  // Definedness suffices for strptime.
 #endif
 #endif
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc
index 6487fa9373..f1f79a20fc 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc
@@ -18,11 +18,15 @@
 #include <sstream>
 #include <string>
 
+#include "absl/base/config.h"
+#include "absl/time/internal/cctz/include/cctz/time_zone.h"
+#if defined(__linux__)
+#include <features.h>
+#endif
+
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
-#include "absl/base/config.h"
 #include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
 
 namespace chrono = std::chrono;
 
@@ -183,8 +187,10 @@ TEST(Format, PosixConversions) {
   TestFormatSpecifier(tp, tz, "%F", "1970-01-01");
   TestFormatSpecifier(tp, tz, "%g", "70");
   TestFormatSpecifier(tp, tz, "%G", "1970");
+#if defined(__GLIBC__)
   TestFormatSpecifier(tp, tz, "%k", " 0");
   TestFormatSpecifier(tp, tz, "%l", "12");
+#endif
   TestFormatSpecifier(tp, tz, "%n", "\n");
   TestFormatSpecifier(tp, tz, "%R", "00:00");
   TestFormatSpecifier(tp, tz, "%t", "\t");
@@ -216,7 +222,9 @@ TEST(Format, LocaleSpecific) {
 #if defined(__linux__)
   // SU/C99/TZ extensions
   TestFormatSpecifier(tp, tz, "%h", "Jan");  // Same as %b
+#if defined(__GLIBC__)
   TestFormatSpecifier(tp, tz, "%P", "am");
+#endif
   TestFormatSpecifier(tp, tz, "%r", "12:00:00 AM");
 
   // Modified conversion specifiers %E_
@@ -1045,9 +1053,11 @@ TEST(Parse, LocaleSpecific) {
   EXPECT_TRUE(parse("%h", "Feb", tz, &tp));
   EXPECT_EQ(2, convert(tp, tz).month());  // Equivalent to %b
 
+#if defined(__GLIBC__)
   tp = reset;
   EXPECT_TRUE(parse("%l %p", "5 PM", tz, &tp));
   EXPECT_EQ(17, convert(tp, tz).hour());
+#endif
 
   tp = reset;
   EXPECT_TRUE(parse("%r", "03:44:55 PM", tz, &tp));
@@ -1055,6 +1065,7 @@ TEST(Parse, LocaleSpecific) {
   EXPECT_EQ(44, convert(tp, tz).minute());
   EXPECT_EQ(55, convert(tp, tz).second());
 
+#if defined(__GLIBC__)
   tp = reset;
   EXPECT_TRUE(parse("%Ec", "Tue Nov 19 05:06:07 2013", tz, &tp));
   EXPECT_EQ(convert(civil_second(2013, 11, 19, 5, 6, 7), tz), tp);
@@ -1126,6 +1137,7 @@ TEST(Parse, LocaleSpecific) {
   EXPECT_TRUE(parse("%Oy", "04", tz, &tp));
   EXPECT_EQ(2004, convert(tp, tz).year());
 #endif
+#endif
 }
 
 TEST(Parse, ExtendedSeconds) {
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc
index 4f175d95fc..787426f755 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc
@@ -134,6 +134,21 @@ std::int_fast64_t Decode64(const char* cp) {
   return static_cast<std::int_fast64_t>(v - s64maxU - 1) - s64max - 1;
 }
 
+// Does the rule for future transitions call for year-round daylight time?
+// See tz/zic.c:stringzone() for the details on how such rules are encoded.
+bool AllYearDST(const PosixTimeZone& posix) {
+  if (posix.dst_start.date.fmt != PosixTransition::N) return false;
+  if (posix.dst_start.date.n.day != 0) return false;
+  if (posix.dst_start.time.offset != 0) return false;
+
+  if (posix.dst_end.date.fmt != PosixTransition::J) return false;
+  if (posix.dst_end.date.j.day != kDaysPerYear[0]) return false;
+  const auto offset = posix.std_offset - posix.dst_offset;
+  if (posix.dst_end.time.offset + offset != kSecsPerDay) return false;
+
+  return true;
+}
+
 // Generate a year-relative offset for a PosixTransition.
 std::int_fast64_t TransOffset(bool leap_year, int jan1_weekday,
                               const PosixTransition& pt) {
@@ -351,6 +366,12 @@ bool TimeZoneInfo::ExtendTransitions() {
   if (!GetTransitionType(posix.dst_offset, true, posix.dst_abbr, &dst_ti))
     return false;
 
+  if (AllYearDST(posix)) {  // dst only
+    // The future specification should match the last transition, and
+    // that means that handling the future will fall out naturally.
+    return EquivTransitions(transitions_.back().type_index, dst_ti);
+  }
+
   // Extend the transitions for an additional 400 years using the
   // future specification. Years beyond those can be handled by
   // mapping back to a cycle-equivalent year within that range.
@@ -481,9 +502,9 @@ bool TimeZoneInfo::Load(ZoneInfoSource* zip) {
   // encoded zoneinfo. The ttisstd/ttisgmt indicators only apply when
   // interpreting a POSIX spec that does not include start/end rules, and
   // that isn't the case here (see "zic -p").
-  bp += (8 + 4) * hdr.leapcnt;  // leap-time + TAI-UTC
-  bp += 1 * hdr.ttisstdcnt;     // UTC/local indicators
-  bp += 1 * hdr.ttisutcnt;      // standard/wall indicators
+  bp += (time_len + 4) * hdr.leapcnt;  // leap-time + TAI-UTC
+  bp += 1 * hdr.ttisstdcnt;            // UTC/local indicators
+  bp += 1 * hdr.ttisutcnt;             // standard/wall indicators
   assert(bp == tbuf.data() + tbuf.size());
 
   future_spec_.clear();
@@ -512,8 +533,8 @@ bool TimeZoneInfo::Load(ZoneInfoSource* zip) {
 
   // Trim redundant transitions. zic may have added these to work around
   // differences between the glibc and reference implementations (see
-  // zic.c:dontmerge) and the Qt library (see zic.c:WORK_AROUND_QTBUG_53071).
-  // For us, they just get in the way when we do future_spec_ extension.
+  // zic.c:dontmerge) or to avoid bugs in old readers. For us, they just
+  // get in the way when we do future_spec_ extension.
   while (hdr.timecnt > 1) {
     if (!EquivTransitions(transitions_[hdr.timecnt - 1].type_index,
                           transitions_[hdr.timecnt - 2].type_index)) {
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc
index 898d04c125..f6983aeb95 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc
@@ -31,7 +31,7 @@
 #if defined(__Fuchsia__)
 #include <fuchsia/intl/cpp/fidl.h>
 #include <lib/async-loop/cpp/loop.h>
-#include <lib/sys/cpp/component_context.h>
+#include <lib/fdio/directory.h>
 #include <zircon/types.h>
 #endif
 
@@ -140,8 +140,9 @@ time_zone local_time_zone() {
   if (CFStringRef tz_name = CFTimeZoneGetName(tz_default)) {
     CFStringEncoding encoding = kCFStringEncodingUTF8;
     CFIndex length = CFStringGetLength(tz_name);
-    buffer.resize(CFStringGetMaximumSizeForEncoding(length, encoding) + 1);
-    if (CFStringGetCString(tz_name, &buffer[0], buffer.size(), encoding)) {
+    CFIndex max_size = CFStringGetMaximumSizeForEncoding(length, encoding) + 1;
+    buffer.resize(static_cast<size_t>(max_size));
+    if (CFStringGetCString(tz_name, &buffer[0], max_size, encoding)) {
       zone = &buffer[0];
     }
   }
@@ -160,11 +161,11 @@ time_zone local_time_zone() {
     // would be set to null when the loop is destroyed, causing any other FIDL
     // code running on the same thread to crash.
     async::Loop loop(&kAsyncLoopConfigNeverAttachToThread);
-    std::unique_ptr<sys::ComponentContext> context =
-        sys::ComponentContext::Create();
 
     fuchsia::intl::PropertyProviderHandle handle;
-    zx_status_t status = context->svc()->Connect(handle.NewRequest());
+    zx_status_t status = fdio_service_connect_by_name(
+        fuchsia::intl::PropertyProvider::Name_,
+        handle.NewRequest().TakeChannel().release());
     if (status != ZX_OK) {
       return;
     }
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index 0226ab71ab..ab461f0451 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -21,10 +21,14 @@
 #include <thread>
 #include <vector>
 
-#include "gtest/gtest.h"
 #include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
 #include "absl/time/internal/cctz/include/cctz/time_zone.h"
+#if defined(__linux__)
+#include <features.h>
+#endif
+
+#include "gtest/gtest.h"
+#include "absl/time/internal/cctz/include/cctz/civil_time.h"
 
 namespace chrono = std::chrono;
 
@@ -485,6 +489,7 @@ const char* const kTimeZoneNames[] = {"Africa/Abidjan",
                                       "Europe/Kaliningrad",
                                       "Europe/Kiev",
                                       "Europe/Kirov",
+                                      "Europe/Kyiv",
                                       "Europe/Lisbon",
                                       "Europe/Ljubljana",
                                       "Europe/London",
@@ -524,6 +529,7 @@ const char* const kTimeZoneNames[] = {"Africa/Abidjan",
                                       "Europe/Zagreb",
                                       "Europe/Zaporozhye",
                                       "Europe/Zurich",
+                                      "Factory",
                                       "GB",
                                       "GB-Eire",
                                       "GMT",
@@ -1043,7 +1049,7 @@ TEST(MakeTime, LocalTimeLibC) {
   //  1) we know how to change the time zone used by localtime()/mktime(),
   //  2) cctz and localtime()/mktime() will use similar-enough tzdata, and
   //  3) we have some idea about how mktime() behaves during transitions.
-#if defined(__linux__) && !defined(__ANDROID__)
+#if defined(__linux__) && defined(__GLIBC__) && !defined(__ANDROID__)
   const char* const ep = getenv("TZ");
   std::string tz_name = (ep != nullptr) ? ep : "";
   for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) {
@@ -1182,6 +1188,45 @@ TEST(PrevTransition, AmericaNewYork) {
   // We have a transition but we don't know which one.
 }
 
+TEST(NextTransition, Scan) {
+  for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) {
+    SCOPED_TRACE(testing::Message() << "In " << *np);
+    time_zone tz;
+    // EXPECT_TRUE(load_time_zone(*np, &tz));
+    if (!load_time_zone(*np, &tz)) {
+      continue;  // tolerate kTimeZoneNames/zoneinfo skew
+    }
+
+    auto tp = time_point<absl::time_internal::cctz::seconds>::min();
+    time_zone::civil_transition trans;
+    while (tz.next_transition(tp, &trans)) {
+      time_zone::civil_lookup from_cl = tz.lookup(trans.from);
+      EXPECT_NE(from_cl.kind, time_zone::civil_lookup::REPEATED);
+      time_zone::civil_lookup to_cl = tz.lookup(trans.to);
+      EXPECT_NE(to_cl.kind, time_zone::civil_lookup::SKIPPED);
+
+      auto trans_tp = to_cl.trans;
+      time_zone::absolute_lookup trans_al = tz.lookup(trans_tp);
+      EXPECT_EQ(trans_al.cs, trans.to);
+      auto pre_trans_tp = trans_tp - absl::time_internal::cctz::seconds(1);
+      time_zone::absolute_lookup pre_trans_al = tz.lookup(pre_trans_tp);
+      EXPECT_EQ(pre_trans_al.cs + 1, trans.from);
+
+      auto offset_delta = trans_al.offset - pre_trans_al.offset;
+      EXPECT_EQ(offset_delta, trans.to - trans.from);
+      if (offset_delta == 0) {
+        // This "transition" is only an is_dst or abbr change.
+        EXPECT_EQ(to_cl.kind, time_zone::civil_lookup::UNIQUE);
+        if (trans_al.is_dst == pre_trans_al.is_dst) {
+          EXPECT_STRNE(trans_al.abbr, pre_trans_al.abbr);
+        }
+      }
+
+      tp = trans_tp;  // continue scan from transition
+    }
+  }
+}
+
 TEST(TimeZoneEdgeCase, AmericaNewYork) {
   const time_zone tz = LoadZone("America/New_York");
 
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc
index 5ab5a59ecf..b818c21381 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc
@@ -66,41 +66,41 @@ extern ZoneInfoSourceFactory zone_info_source_factory;
 extern ZoneInfoSourceFactory default_factory;
 ZoneInfoSourceFactory default_factory = DefaultFactory;
 #if defined(_M_IX86) || defined(_M_ARM)
-#pragma comment(                                                                                                         \
-    linker,                                                                                                              \
-    "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                    \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZA")
+#pragma comment(                                                                                                                 \
+        linker,                                                                                                                  \
+            "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                    \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZA")
 #elif defined(_M_IA_64) || defined(_M_AMD64) || defined(_M_ARM64)
-#pragma comment(                                                                                                          \
-    linker,                                                                                                               \
-    "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                     \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZEA")
+#pragma comment(                                                                                                                  \
+        linker,                                                                                                                   \
+            "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                     \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZEA")
 #else
 #error Unsupported MSVC platform
 #endif  // _M_<PLATFORM>
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/README.zoneinfo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/README.zoneinfo
index 95fb4a91d1..67e9c404ac 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/README.zoneinfo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/README.zoneinfo
@@ -21,6 +21,7 @@ New versions can be generated using the following shell script.
                 REDO=posix_only \
                 LOCALTIME=Factory \
                 TZDATA_TEXT= \
+                PACKRATDATA=backzone PACKRATLIST=zone.tab \
                 ZONETABLES=zone1970.tab
     tar --create --dereference --hard-dereference --file tzfile.tar \
         --directory=tz tzfile.h
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/version b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/version
index 8ee898ba7d..5c8fbb478a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/version
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/version
@@ -1 +1 @@
-2021e
+2022f
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra
index 8906e88c81..c39ae382b5 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa
index 5f4ebcb7f9..4e8951f5bb 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara
index 5f4ebcb7f9..194e98690f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera
index 5f4ebcb7f9..194e98690f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako
index 8906e88c81..3cb875fade 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui
index 3d7a71ba0e..0021d2d7fd 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul
index 8906e88c81..b235744351 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Blantyre b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Blantyre
index 651e5cf67a..d7bca1e603 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Blantyre
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Blantyre
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Brazzaville b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Brazzaville
index 3d7a71ba0e..57a723b2ed 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Brazzaville
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Brazzaville
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bujumbura b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bujumbura
index 651e5cf67a..90b8679b36 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bujumbura
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bujumbura
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Conakry b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Conakry
index 8906e88c81..c22c328b29 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Conakry
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Conakry
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dakar b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dakar
index 8906e88c81..1f04c586ac 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dakar
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dakar
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dar_es_Salaam b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dar_es_Salaam
index 5f4ebcb7f9..b37c2b4464 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dar_es_Salaam
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Dar_es_Salaam
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Djibouti b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Djibouti
index 5f4ebcb7f9..e9bbc7ad9f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Djibouti
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Djibouti
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Douala b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Douala
index 3d7a71ba0e..65001f609d 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Douala
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Douala
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Freetown b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Freetown
index 8906e88c81..8431ed65b9 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Freetown
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Freetown
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Gaborone b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Gaborone
index 651e5cf67a..e44209890b 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Gaborone
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Gaborone
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Harare b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Harare
index 651e5cf67a..c4a502cfde 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Harare
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Harare
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kampala b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kampala
index 5f4ebcb7f9..3021d844d9 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kampala
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kampala
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kigali b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kigali
index 651e5cf67a..b2eff5701e 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kigali
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kigali
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kinshasa b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kinshasa
index 3d7a71ba0e..8d6f2a8c03 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kinshasa
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Kinshasa
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Libreville b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Libreville
index 3d7a71ba0e..1544cf5b85 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Libreville
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Libreville
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lome b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lome
index 8906e88c81..8e2b700119 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lome
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lome
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Luanda b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Luanda
index 3d7a71ba0e..226d87f06f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Luanda
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Luanda
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lubumbashi b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lubumbashi
index 651e5cf67a..14e1ee1602 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lubumbashi
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lubumbashi
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lusaka b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lusaka
index 651e5cf67a..18fcb1689f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lusaka
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Lusaka
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Malabo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Malabo
index 3d7a71ba0e..8a3f4e9adf 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Malabo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Malabo
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Maseru b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Maseru
index bada0638f8..820d852155 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Maseru
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Maseru
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mbabane b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mbabane
index bada0638f8..d57a53c48c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mbabane
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mbabane
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mogadishu b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mogadishu
index 5f4ebcb7f9..25a597399b 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mogadishu
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Mogadishu
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Niamey b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Niamey
index 3d7a71ba0e..bdf222af21 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Niamey
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Niamey
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Nouakchott b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Nouakchott
index 8906e88c81..faa6f324cb 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Nouakchott
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Nouakchott
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Ouagadougou b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Ouagadougou
index 8906e88c81..f4e55aeb8a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Ouagadougou
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Ouagadougou
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Porto-Novo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Porto-Novo
index 3d7a71ba0e..a869ec3f1f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Porto-Novo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Porto-Novo
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Timbuktu b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Timbuktu
index 8906e88c81..3cb875fade 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Timbuktu
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Africa/Timbuktu
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Anguilla b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Anguilla
index 47b4dc3416..d057735073 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Anguilla
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Anguilla
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Antigua b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Antigua
index 47b4dc3416..7ef2cc9972 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Antigua
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Antigua
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Aruba b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Aruba
index 47b4dc3416..6158ca50eb 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Aruba
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Aruba
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Atikokan b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Atikokan
index 9154643f4c..c828715283 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Atikokan
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Atikokan
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas
index cbe22a7622..48faea2ece 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Blanc-Sablon b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Blanc-Sablon
index 47b4dc3416..7096b69a56 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Blanc-Sablon
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Blanc-Sablon
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Cayman b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Cayman
index 9154643f4c..8be5515631 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Cayman
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Cayman
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua
index e1780a5750..5e0a54f004 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Coral_Harbour b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Coral_Harbour
index 9154643f4c..c828715283 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Coral_Harbour
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Coral_Harbour
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Creston b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Creston
index c2bd2f949b..9d69a0ab81 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Creston
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Creston
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Curacao b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Curacao
index 47b4dc3416..d6ddf7d8f6 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Curacao
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Curacao
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Dominica b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Dominica
index 47b4dc3416..7c7cebfa84 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Dominica
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Dominica
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ensenada b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ensenada
index 19ccd3576d..e8be26b139 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ensenada
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ensenada
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Grenada b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Grenada
index 47b4dc3416..a58e63a44f 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Grenada
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Grenada
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Guadeloupe b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Guadeloupe
index 47b4dc3416..717473833e 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Guadeloupe
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Guadeloupe
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Hermosillo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Hermosillo
index 8283239eca..5c92e2967e 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Hermosillo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Hermosillo
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Kralendijk b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Kralendijk
index 47b4dc3416..d6ddf7d8f6 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Kralendijk
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Kralendijk
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Lower_Princes b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Lower_Princes
index 47b4dc3416..d6ddf7d8f6 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Lower_Princes
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Lower_Princes
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Marigot b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Marigot
index 47b4dc3416..f4fe590342 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Marigot
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Marigot
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Matamoros b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Matamoros
index 722751b20e..88cabcd152 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Matamoros
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Matamoros
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan
index 4c819fab02..97d4d36c13 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Merida b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Merida
index d3b0ca12c9..e5de1131dc 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Merida
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Merida
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City
index ffcf8bee10..80a415c70c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey
index dea9e3f586..a5822e2c62 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Montserrat b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Montserrat
index 47b4dc3416..41bf898bd7 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Montserrat
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Montserrat
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nassau b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nassau
index fe6be8ea8c..2ef2aa8971 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nassau
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nassau
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon
index b9f67a9f94..fe6be8ea8c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga
index da0909cb21..560b8674f7 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Port_of_Spain b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Port_of_Spain
index 47b4dc3416..f4fe590342 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Port_of_Spain
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Port_of_Spain
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Punta_Arenas b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Punta_Arenas
index 5c9a20b947..aa839ea7d4 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Punta_Arenas
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Punta_Arenas
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River
index d6ddda4822..7e646d18e1 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santa_Isabel b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santa_Isabel
index 19ccd3576d..e8be26b139 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santa_Isabel
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santa_Isabel
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santiago b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santiago
index 8d6032264b..d3fc9b8343 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santiago
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Santiago
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Barthelemy b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Barthelemy
index 47b4dc3416..f4fe590342 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Barthelemy
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Barthelemy
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Kitts b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Kitts
index 47b4dc3416..6170b6c09d 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Kitts
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Kitts
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Lucia b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Lucia
index 47b4dc3416..e265baffbf 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Lucia
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Lucia
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Thomas b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Thomas
index 47b4dc3416..0e62d30bb5 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Thomas
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Thomas
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Vincent b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Vincent
index 47b4dc3416..64cbf90248 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Vincent
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/St_Vincent
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay
index fcb0328043..fe6be8ea8c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tijuana b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tijuana
index 19ccd3576d..e8be26b139 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tijuana
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tijuana
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tortola b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tortola
index 47b4dc3416..a0a5d6021a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tortola
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Tortola
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Virgin b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Virgin
index 47b4dc3416..0e62d30bb5 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Virgin
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/America/Virgin
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/DumontDUrville b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/DumontDUrville
index 5d8fc3a1b2..c0cfc85a29 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/DumontDUrville
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/DumontDUrville
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/McMurdo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/McMurdo
index afb3929318..ea1f8f8a77 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/McMurdo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/McMurdo
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/South_Pole b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/South_Pole
index afb3929318..ea1f8f8a77 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/South_Pole
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/South_Pole
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/Syowa b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/Syowa
index 01c47ccb86..97d80d752c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/Syowa
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Antarctica/Syowa
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Aden b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Aden
index 01c47ccb86..ac571479d1 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Aden
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Aden
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Amman b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Amman
index d97d308d7a..a3f9dff571 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Amman
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Amman
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Bahrain b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Bahrain
index 7409d74983..33f7a2073b 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Bahrain
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Bahrain
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Damascus b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Damascus
index 168ef9baa4..bd1624de51 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Damascus
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Damascus
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Gaza b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Gaza
index ccc57c9ce1..bed968e7ec 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Gaza
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Gaza
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Hebron b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Hebron
index 906d8d5cba..3ce1bac631 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Hebron
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Hebron
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Ho_Chi_Minh b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Ho_Chi_Minh
index 7ca9972502..de53596d68 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Ho_Chi_Minh
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Ho_Chi_Minh
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Kuwait b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Kuwait
index 01c47ccb86..5c7f106a35 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Kuwait
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Kuwait
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Muscat b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Muscat
index 58d75bc26e..cce5e19345 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Muscat
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Muscat
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Phnom_Penh b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Phnom_Penh
index ed687d2985..c49800e7ee 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Phnom_Penh
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Phnom_Penh
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Saigon b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Saigon
index 7ca9972502..de53596d68 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Saigon
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Saigon
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Tehran b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Tehran
index f1555f0032..824acb0426 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Tehran
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Tehran
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Vientiane b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Vientiane
index ed687d2985..659e511dff 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Vientiane
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Asia/Vientiane
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Atlantic/St_Helena b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Atlantic/St_Helena
index 8906e88c81..6f7506807a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Atlantic/St_Helena
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Atlantic/St_Helena
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/Continental b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/Continental
index 8d6032264b..d3fc9b8343 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/Continental
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/Continental
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/EasterIsland b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/EasterIsland
index d29bcd68b0..54dff005b8 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/EasterIsland
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Chile/EasterIsland
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Eire b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Eire
index 4a45ea8f73..17d2b1582d 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Eire
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Eire
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Dublin b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Dublin
index 4a45ea8f73..17d2b1582d 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Dublin
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Dublin
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Guernsey b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Guernsey
index 323cd3818a..d40bcaa316 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Guernsey
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Guernsey
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Isle_of_Man b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Isle_of_Man
index 323cd3818a..b0a37e7e09 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Isle_of_Man
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Isle_of_Man
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Jersey b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Jersey
index 323cd3818a..9a10a2ec0a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Jersey
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Jersey
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kiev b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kiev
index 8f83cefbcc..4e026859fd 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kiev
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kiev
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kyiv b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kyiv
new file mode 100644
index 0000000000..4e026859fd
--- /dev/null
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Kyiv
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Ljubljana b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Ljubljana
index a1bf9281ed..fdb9e86d4a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Ljubljana
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Ljubljana
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Sarajevo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Sarajevo
index a1bf9281ed..53db056883 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Sarajevo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Sarajevo
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Simferopol b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Simferopol
index 88a6f3bdb4..298b8326ca 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Simferopol
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Simferopol
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Skopje b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Skopje
index a1bf9281ed..036361cfba 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Skopje
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Skopje
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Uzhgorod b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Uzhgorod
index a5755685e3..4e026859fd 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Uzhgorod
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Uzhgorod
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Vaduz b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Vaduz
index 388df2969f..28465d83a9 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Vaduz
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Vaduz
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zagreb b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zagreb
index a1bf9281ed..8e13ede8d4 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zagreb
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zagreb
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zaporozhye b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zaporozhye
index 4ea8dae45a..4e026859fd 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zaporozhye
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Europe/Zaporozhye
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Antananarivo b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Antananarivo
index 5f4ebcb7f9..0bf86f024a 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Antananarivo
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Antananarivo
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Comoro b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Comoro
index 5f4ebcb7f9..640b3e8848 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Comoro
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Comoro
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Mayotte b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Mayotte
index 5f4ebcb7f9..7a009c3122 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Mayotte
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Indian/Mayotte
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Iran b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Iran
index f1555f0032..824acb0426 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Iran
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Iran
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaNorte b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaNorte
index 19ccd3576d..e8be26b139 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaNorte
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaNorte
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur
index 4c819fab02..97d4d36c13 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General
index ffcf8bee10..80a415c70c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Easter b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Easter
index d29bcd68b0..54dff005b8 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Easter
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Easter
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji
index 8b2dd52b17..610b850b1d 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Midway b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Midway
index 001289ceec..b25364c599 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Midway
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Midway
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Saipan b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Saipan
index bf9a2d955f..9539353b2c 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Saipan
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Saipan
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/localtime b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/localtime
deleted file mode 100644
index afeeb88d06..0000000000
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/localtime
+++ /dev/null
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
index c614be81f4..75372e3fa4 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
@@ -34,7 +34,7 @@
 #country-
 #codes	coordinates	TZ	comments
 AD	+4230+00131	Europe/Andorra
-AE,OM	+2518+05518	Asia/Dubai
+AE,OM,RE,SC,TF	+2518+05518	Asia/Dubai	UAE, Oman, Réunion, Seychelles, Crozet, Scattered Is
 AF	+3431+06912	Asia/Kabul
 AL	+4120+01950	Europe/Tirane
 AM	+4011+04430	Asia/Yerevan
@@ -44,7 +44,6 @@ AQ	-6736+06253	Antarctica/Mawson	Mawson
 AQ	-6448-06406	Antarctica/Palmer	Palmer
 AQ	-6734-06808	Antarctica/Rothera	Rothera
 AQ	-720041+0023206	Antarctica/Troll	Troll
-AQ	-7824+10654	Antarctica/Vostok	Vostok
 AR	-3436-05827	America/Argentina/Buenos_Aires	Buenos Aires (BA, CF)
 AR	-3124-06411	America/Argentina/Cordoba	Argentina (most areas: CB, CC, CN, ER, FM, MN, SE, SF)
 AR	-2447-06525	America/Argentina/Salta	Salta (SA, LP, NQ, RN)
@@ -74,10 +73,9 @@ AU	-3143+12852	Australia/Eucla	Western Australia (Eucla)
 AZ	+4023+04951	Asia/Baku
 BB	+1306-05937	America/Barbados
 BD	+2343+09025	Asia/Dhaka
-BE	+5050+00420	Europe/Brussels
+BE,LU,NL	+5050+00420	Europe/Brussels
 BG	+4241+02319	Europe/Sofia
 BM	+3217-06446	Atlantic/Bermuda
-BN	+0456+11455	Asia/Brunei
 BO	-1630-06809	America/La_Paz
 BR	-0351-03225	America/Noronha	Atlantic islands
 BR	-0127-04829	America/Belem	Pará (east); Amapá
@@ -104,12 +102,9 @@ CA	+4612-05957	America/Glace_Bay	Atlantic - NS (Cape Breton)
 CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
 CA,BS	+4339-07923	America/Toronto	Eastern - ON, QC (most areas), Bahamas
-CA	+4901-08816	America/Nipigon	Eastern - ON, QC (no DST 1967-73)
-CA	+4823-08915	America/Thunder_Bay	Eastern - ON (Thunder Bay)
 CA	+6344-06828	America/Iqaluit	Eastern - NU (most east areas)
 CA	+6608-06544	America/Pangnirtung	Eastern - NU (Pangnirtung)
 CA	+4953-09709	America/Winnipeg	Central - ON (west); Manitoba
-CA	+4843-09434	America/Rainy_River	Central - ON (Rainy R, Ft Frances)
 CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
 CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
 CA	+5024-10439	America/Regina	CST - SK (most areas)
@@ -118,30 +113,27 @@ CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); SK (W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
 CA	+6227-11421	America/Yellowknife	Mountain - NT (central)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
-CA	+5946-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
+CA	+5546-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
 CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
 CA	+6043-13503	America/Whitehorse	MST - Yukon (east)
 CA	+6404-13925	America/Dawson	MST - Yukon (west)
 CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
-CC	-1210+09655	Indian/Cocos
 CH,DE,LI	+4723+00832	Europe/Zurich	Swiss time
-CI,BF,GH,GM,GN,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
+CI,BF,GH,GM,GN,IS,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
 CK	-2114-15946	Pacific/Rarotonga
 CL	-3327-07040	America/Santiago	Chile (most areas)
 CL	-5309-07055	America/Punta_Arenas	Region of Magallanes
 CL	-2709-10926	Pacific/Easter	Easter Island
 CN	+3114+12128	Asia/Shanghai	Beijing Time
-CN	+4348+08735	Asia/Urumqi	Xinjiang Time
+CN,AQ	+4348+08735	Asia/Urumqi	Xinjiang Time, Vostok
 CO	+0436-07405	America/Bogota
 CR	+0956-08405	America/Costa_Rica
 CU	+2308-08222	America/Havana
 CV	+1455-02331	Atlantic/Cape_Verde
-CX	-1025+10543	Indian/Christmas
 CY	+3510+03322	Asia/Nicosia	Cyprus (most areas)
 CY	+3507+03357	Asia/Famagusta	Northern Cyprus
 CZ,SK	+5005+01426	Europe/Prague
-DE	+5230+01322	Europe/Berlin	Germany (most areas)
-DK	+5540+01235	Europe/Copenhagen
+DE,DK,NO,SE,SJ	+5230+01322	Europe/Berlin	Germany (most areas), Scandinavia
 DO	+1828-06954	America/Santo_Domingo
 DZ	+3647+00303	Africa/Algiers
 EC	-0210-07950	America/Guayaquil	Ecuador (mainland)
@@ -155,11 +147,9 @@ ES	+2806-01524	Atlantic/Canary	Canary Islands
 FI,AX	+6010+02458	Europe/Helsinki
 FJ	-1808+17825	Pacific/Fiji
 FK	-5142-05751	Atlantic/Stanley
-FM	+0725+15147	Pacific/Chuuk	Chuuk/Truk, Yap
-FM	+0658+15813	Pacific/Pohnpei	Pohnpei/Ponape
 FM	+0519+16259	Pacific/Kosrae	Kosrae
 FO	+6201-00646	Atlantic/Faroe
-FR	+4852+00220	Europe/Paris
+FR,MC	+4852+00220	Europe/Paris
 GB,GG,IM,JE	+513030-0000731	Europe/London
 GE	+4143+04449	Asia/Tbilisi
 GF	+0456-05220	America/Cayenne
@@ -188,14 +178,13 @@ IN	+2232+08822	Asia/Kolkata
 IO	-0720+07225	Indian/Chagos
 IQ	+3321+04425	Asia/Baghdad
 IR	+3540+05126	Asia/Tehran
-IS	+6409-02151	Atlantic/Reykjavik
 IT,SM,VA	+4154+01229	Europe/Rome
 JM	+175805-0764736	America/Jamaica
 JO	+3157+03556	Asia/Amman
 JP	+353916+1394441	Asia/Tokyo
 KE,DJ,ER,ET,KM,MG,SO,TZ,UG,YT	-0117+03649	Africa/Nairobi
 KG	+4254+07436	Asia/Bishkek
-KI	+0125+17300	Pacific/Tarawa	Gilbert Islands
+KI,MH,TV,UM,WF	+0125+17300	Pacific/Tarawa	Gilberts, Marshalls, Tuvalu, Wallis & Futuna, Wake
 KI	-0247-17143	Pacific/Kanton	Phoenix Islands
 KI	+0152-15720	Pacific/Kiritimati	Line Islands
 KP	+3901+12545	Asia/Pyongyang
@@ -211,15 +200,12 @@ LB	+3353+03530	Asia/Beirut
 LK	+0656+07951	Asia/Colombo
 LR	+0618-01047	Africa/Monrovia
 LT	+5441+02519	Europe/Vilnius
-LU	+4936+00609	Europe/Luxembourg
 LV	+5657+02406	Europe/Riga
 LY	+3254+01311	Africa/Tripoli
 MA	+3339-00735	Africa/Casablanca
-MC	+4342+00723	Europe/Monaco
 MD	+4700+02850	Europe/Chisinau
-MH	+0709+17112	Pacific/Majuro	Marshall Islands (most areas)
 MH	+0905+16720	Pacific/Kwajalein	Kwajalein
-MM	+1647+09610	Asia/Yangon
+MM,CC	+1647+09610	Asia/Yangon
 MN	+4755+10653	Asia/Ulaanbaatar	Mongolia (most areas)
 MN	+4801+09139	Asia/Hovd	Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan
 MN	+4804+11430	Asia/Choibalsan	Dornod, Sükhbaatar
@@ -227,7 +213,7 @@ MO	+221150+1133230	Asia/Macau
 MQ	+1436-06105	America/Martinique
 MT	+3554+01431	Europe/Malta
 MU	-2010+05730	Indian/Mauritius
-MV	+0410+07330	Indian/Maldives
+MV,TF	+0410+07330	Indian/Maldives	Maldives, Kerguelen, St Paul I, Amsterdam I
 MX	+1924-09909	America/Mexico_City	Central Time
 MX	+2105-08646	America/Cancun	Eastern Standard Time - Quintana Roo
 MX	+2058-08937	America/Merida	Central Time - Campeche, Yucatán
@@ -239,16 +225,13 @@ MX	+2934-10425	America/Ojinaga	Mountain Time US - Chihuahua (US border)
 MX	+2904-11058	America/Hermosillo	Mountain Standard Time - Sonora
 MX	+3232-11701	America/Tijuana	Pacific Time US - Baja California
 MX	+2048-10515	America/Bahia_Banderas	Central Time - Bahía de Banderas
-MY	+0310+10142	Asia/Kuala_Lumpur	Malaysia (peninsula)
-MY	+0133+11020	Asia/Kuching	Sabah, Sarawak
+MY,BN	+0133+11020	Asia/Kuching	Sabah, Sarawak, Brunei
 MZ,BI,BW,CD,MW,RW,ZM,ZW	-2558+03235	Africa/Maputo	Central Africa Time
 NA	-2234+01706	Africa/Windhoek
 NC	-2216+16627	Pacific/Noumea
 NF	-2903+16758	Pacific/Norfolk
 NG,AO,BJ,CD,CF,CG,CM,GA,GQ,NE	+0627+00324	Africa/Lagos	West Africa Time
 NI	+1209-08617	America/Managua
-NL	+5222+00454	Europe/Amsterdam
-NO,SJ	+5955+01045	Europe/Oslo
 NP	+2743+08519	Asia/Kathmandu
 NR	-0031+16655	Pacific/Nauru
 NU	-1901-16955	Pacific/Niue
@@ -259,7 +242,7 @@ PE	-1203-07703	America/Lima
 PF	-1732-14934	Pacific/Tahiti	Society Islands
 PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
 PF	-2308-13457	Pacific/Gambier	Gambier Islands
-PG,AQ	-0930+14710	Pacific/Port_Moresby	Papua New Guinea (most areas), Dumont d'Urville
+PG,AQ,FM	-0930+14710	Pacific/Port_Moresby	Papua New Guinea (most areas), Chuuk, Yap, Dumont d'Urville
 PG	-0613+15534	Pacific/Bougainville	Bougainville
 PH	+1435+12100	Asia/Manila
 PK	+2452+06703	Asia/Karachi
@@ -275,7 +258,6 @@ PT	+3744-02540	Atlantic/Azores	Azores
 PW	+0720+13429	Pacific/Palau
 PY	-2516-05740	America/Asuncion
 QA,BH	+2517+05132	Asia/Qatar
-RE,TF	-2052+05528	Indian/Reunion	Réunion, Crozet, Scattered Islands
 RO	+4426+02606	Europe/Bucharest
 RS,BA,HR,ME,MK,SI	+4450+02030	Europe/Belgrade
 RU	+5443+02030	Europe/Kaliningrad	MSK-01 - Kaliningrad
@@ -307,10 +289,8 @@ RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is
 RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
 RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
 SA,AQ,KW,YE	+2438+04643	Asia/Riyadh	Arabia, Syowa
-SB	-0932+16012	Pacific/Guadalcanal
-SC	-0440+05528	Indian/Mahe
+SB,FM	-0932+16012	Pacific/Guadalcanal	Solomons, Pohnpei
 SD	+1536+03232	Africa/Khartoum
-SE	+5920+01803	Europe/Stockholm
 SG,MY	+0117+10351	Asia/Singapore	Singapore, peninsular Malaysia
 SR	+0550-05510	America/Paramaribo
 SS	+0451+03137	Africa/Juba
@@ -319,8 +299,7 @@ SV	+1342-08912	America/El_Salvador
 SY	+3330+03618	Asia/Damascus
 TC	+2128-07108	America/Grand_Turk
 TD	+1207+01503	Africa/Ndjamena
-TF	-492110+0701303	Indian/Kerguelen	Kerguelen, St Paul Island, Amsterdam Island
-TH,KH,LA,VN	+1345+10031	Asia/Bangkok	Indochina (most areas)
+TH,CX,KH,LA,VN	+1345+10031	Asia/Bangkok	Indochina (most areas)
 TJ	+3835+06848	Asia/Dushanbe
 TK	-0922-17114	Pacific/Fakaofo
 TL	-0833+12535	Asia/Dili
@@ -328,12 +307,8 @@ TM	+3757+05823	Asia/Ashgabat
 TN	+3648+01011	Africa/Tunis
 TO	-210800-1751200	Pacific/Tongatapu
 TR	+4101+02858	Europe/Istanbul
-TV	-0831+17913	Pacific/Funafuti
 TW	+2503+12130	Asia/Taipei
-UA	+5026+03031	Europe/Kiev	Ukraine (most areas)
-UA	+4837+02218	Europe/Uzhgorod	Transcarpathia
-UA	+4750+03510	Europe/Zaporozhye	Zaporozhye and east Lugansk
-UM	+1917+16637	Pacific/Wake	Wake Island
+UA	+5026+03031	Europe/Kyiv	Ukraine (most areas)
 US	+404251-0740023	America/New_York	Eastern (most areas)
 US	+421953-0830245	America/Detroit	Eastern - MI (most areas)
 US	+381515-0854534	America/Kentucky/Louisville	Eastern - KY (Louisville area)
@@ -369,6 +344,29 @@ UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
 VE	+1030-06656	America/Caracas
 VN	+1045+10640	Asia/Ho_Chi_Minh	Vietnam (south)
 VU	-1740+16825	Pacific/Efate
-WF	-1318-17610	Pacific/Wallis
 WS	-1350-17144	Pacific/Apia
 ZA,LS,SZ	-2615+02800	Africa/Johannesburg
+#
+# The next section contains experimental tab-separated comments for
+# use by user agents like tzselect that identify continents and oceans.
+#
+# For example, the comment "#@AQ<tab>Antarctica/" means the country code
+# AQ is in the continent Antarctica regardless of the Zone name,
+# so Pacific/Auckland should be listed under Antarctica as well as
+# under the Pacific because its line's country codes include AQ.
+#
+# If more than one country code is affected each is listed separated
+# by commas, e.g., #@IS,SH<tab>Atlantic/".  If a country code is in
+# more than one continent or ocean, each is listed separated by
+# commas, e.g., the second column of "#@CY,TR<tab>Asia/,Europe/".
+#
+# These experimental comments are present only for country codes where
+# the continent or ocean is not already obvious from the Zone name.
+# For example, there is no such comment for RU since it already
+# corresponds to Zone names starting with both "Europe/" and "Asia/".
+#
+#@AQ	Antarctica/
+#@IS,SH	Atlantic/
+#@CY,TR	Asia/,Europe/
+#@SJ	Arctic/
+#@CC,CX,KM,MG,YT	Indian/
diff --git a/third_party/abseil-cpp/absl/time/internal/test_util.cc b/third_party/abseil-cpp/absl/time/internal/test_util.cc
index 9a485a0750..4b7849c624 100644
--- a/third_party/abseil-cpp/absl/time/internal/test_util.cc
+++ b/third_party/abseil-cpp/absl/time/internal/test_util.cc
@@ -17,6 +17,7 @@
 #include <algorithm>
 #include <cstddef>
 #include <cstring>
+#include <memory>
 
 #include "absl/base/config.h"
 #include "absl/base/internal/raw_logging.h"
@@ -67,10 +68,6 @@ const struct ZoneInfo {
     {"Invalid/TimeZone", nullptr, 0},
     {"", nullptr, 0},
 
-    // Also allow for loading the local time zone under TZ=US/Pacific.
-    {"US/Pacific",  //
-     reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
-
     // Allows use of the local time zone from a system-specific location.
 #ifdef _MSC_VER
     {"localtime",  //
@@ -87,14 +84,15 @@ class TestZoneInfoSource : public cctz::ZoneInfoSource {
       : data_(data), end_(data + size) {}
 
   std::size_t Read(void* ptr, std::size_t size) override {
-    const std::size_t len = std::min<std::size_t>(size, end_ - data_);
+    const std::size_t len =
+        std::min(size, static_cast<std::size_t>(end_ - data_));
     memcpy(ptr, data_, len);
     data_ += len;
     return len;
   }
 
   int Skip(std::size_t offset) override {
-    data_ += std::min<std::size_t>(offset, end_ - data_);
+    data_ += std::min(offset, static_cast<std::size_t>(end_ - data_));
     return 0;
   }
 
@@ -114,7 +112,10 @@ std::unique_ptr<cctz::ZoneInfoSource> TestFactory(
           new TestZoneInfoSource(zoneinfo.data, zoneinfo.length));
     }
   }
-  ABSL_RAW_LOG(FATAL, "Unexpected time zone \"%s\" in test", name.c_str());
+
+  // The embedded zoneinfo data does not include the zone, so fallback to
+  // built-in UTC. The tests have been crafted so that this should only
+  // happen when testing absl::LocalTimeZone() with an unconstrained ${TZ}.
   return nullptr;
 }
 
diff --git a/third_party/abseil-cpp/absl/time/internal/zoneinfo.inc b/third_party/abseil-cpp/absl/time/internal/zoneinfo.inc
index bfed82990d..7d8b3ff2f6 100644
--- a/third_party/abseil-cpp/absl/time/internal/zoneinfo.inc
+++ b/third_party/abseil-cpp/absl/time/internal/zoneinfo.inc
@@ -88,157 +88,156 @@ unsigned char America_Los_Angeles[] = {
   0x00, 0x01, 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x05, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0xbb, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x14, 0xf8, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x5e, 0x04,
-  0x1a, 0xc0, 0xff, 0xff, 0xff, 0xff, 0x9e, 0xa6, 0x48, 0xa0, 0xff, 0xff,
-  0xff, 0xff, 0x9f, 0xbb, 0x15, 0x90, 0xff, 0xff, 0xff, 0xff, 0xa0, 0x86,
-  0x2a, 0xa0, 0xff, 0xff, 0xff, 0xff, 0xa1, 0x9a, 0xf7, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xcb, 0x89, 0x1a, 0xa0, 0xff, 0xff, 0xff, 0xff, 0xd2, 0x23,
-  0xf4, 0x70, 0xff, 0xff, 0xff, 0xff, 0xd2, 0x61, 0x26, 0x10, 0xff, 0xff,
-  0xff, 0xff, 0xd6, 0xfe, 0x74, 0x5c, 0xff, 0xff, 0xff, 0xff, 0xd8, 0x80,
-  0xad, 0x90, 0xff, 0xff, 0xff, 0xff, 0xda, 0xfe, 0xc3, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xdb, 0xc0, 0x90, 0x10, 0xff, 0xff, 0xff, 0xff, 0xdc, 0xde,
-  0xa5, 0x90, 0xff, 0xff, 0xff, 0xff, 0xdd, 0xa9, 0xac, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xde, 0xbe, 0x87, 0x90, 0xff, 0xff, 0xff, 0xff, 0xdf, 0x89,
-  0x8e, 0x90, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x9e, 0x69, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xe1, 0x69, 0x70, 0x90, 0xff, 0xff, 0xff, 0xff, 0xe2, 0x7e,
-  0x4b, 0x90, 0xff, 0xff, 0xff, 0xff, 0xe3, 0x49, 0x52, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xe4, 0x5e, 0x2d, 0x90, 0xff, 0xff, 0xff, 0xff, 0xe5, 0x29,
-  0x34, 0x90, 0xff, 0xff, 0xff, 0xff, 0xe6, 0x47, 0x4a, 0x10, 0xff, 0xff,
-  0xff, 0xff, 0xe7, 0x12, 0x51, 0x10, 0xff, 0xff, 0xff, 0xff, 0xe8, 0x27,
-  0x2c, 0x10, 0xff, 0xff, 0xff, 0xff, 0xe8, 0xf2, 0x33, 0x10, 0xff, 0xff,
-  0xff, 0xff, 0xea, 0x07, 0x0e, 0x10, 0xff, 0xff, 0xff, 0xff, 0xea, 0xd2,
-  0x15, 0x10, 0xff, 0xff, 0xff, 0xff, 0xeb, 0xe6, 0xf0, 0x10, 0xff, 0xff,
-  0xff, 0xff, 0xec, 0xb1, 0xf7, 0x10, 0xff, 0xff, 0xff, 0xff, 0xed, 0xc6,
-  0xd2, 0x10, 0xff, 0xff, 0xff, 0xff, 0xee, 0x91, 0xd9, 0x10, 0xff, 0xff,
-  0xff, 0xff, 0xef, 0xaf, 0xee, 0x90, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x71,
-  0xbb, 0x10, 0xff, 0xff, 0xff, 0xff, 0xf1, 0x8f, 0xd0, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xf2, 0x7f, 0xc1, 0x90, 0xff, 0xff, 0xff, 0xff, 0xf3, 0x6f,
-  0xb2, 0x90, 0xff, 0xff, 0xff, 0xff, 0xf4, 0x5f, 0xa3, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xf5, 0x4f, 0x94, 0x90, 0xff, 0xff, 0xff, 0xff, 0xf6, 0x3f,
-  0x85, 0x90, 0xff, 0xff, 0xff, 0xff, 0xf7, 0x2f, 0x76, 0x90, 0xff, 0xff,
-  0xff, 0xff, 0xf8, 0x28, 0xa2, 0x10, 0xff, 0xff, 0xff, 0xff, 0xf9, 0x0f,
-  0x58, 0x90, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x08, 0x84, 0x10, 0xff, 0xff,
-  0xff, 0xff, 0xfa, 0xf8, 0x83, 0x20, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xe8,
-  0x66, 0x10, 0xff, 0xff, 0xff, 0xff, 0xfc, 0xd8, 0x65, 0x20, 0xff, 0xff,
-  0xff, 0xff, 0xfd, 0xc8, 0x48, 0x10, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xb8,
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+  0x43, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x09, 0x10, 0xce, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x09, 0xad, 0xbf, 0x20, 0x00, 0x00, 0x00, 0x00, 0x0a, 0xf0,
+  0xb0, 0x90, 0x00, 0x00, 0x00, 0x00, 0x0b, 0xe0, 0xaf, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x0c, 0xd9, 0xcd, 0x10, 0x00, 0x00, 0x00, 0x00, 0x0d, 0xc0,
+  0x91, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x0e, 0xb9, 0xaf, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x0f, 0xa9, 0xae, 0x20, 0x00, 0x00, 0x00, 0x00, 0x10, 0x99,
+  0x91, 0x10, 0x00, 0x00, 0x00, 0x00, 0x11, 0x89, 0x90, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x12, 0x79, 0x73, 0x10, 0x00, 0x00, 0x00, 0x00, 0x13, 0x69,
+  0x72, 0x20, 0x00, 0x00, 0x00, 0x00, 0x14, 0x59, 0x55, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x15, 0x49, 0x54, 0x20, 0x00, 0x00, 0x00, 0x00, 0x16, 0x39,
+  0x37, 0x10, 0x00, 0x00, 0x00, 0x00, 0x17, 0x29, 0x36, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x18, 0x22, 0x53, 0x90, 0x00, 0x00, 0x00, 0x00, 0x19, 0x09,
+  0x18, 0x20, 0x00, 0x00, 0x00, 0x00, 0x1a, 0x02, 0x35, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x1a, 0xf2, 0x34, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x1b, 0xe2,
+  0x17, 0x90, 0x00, 0x00, 0x00, 0x00, 0x1c, 0xd2, 0x16, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x1d, 0xc1, 0xf9, 0x90, 0x00, 0x00, 0x00, 0x00, 0x1e, 0xb1,
+  0xf8, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x1f, 0xa1, 0xdb, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x20, 0x76, 0x2b, 0x20, 0x00, 0x00, 0x00, 0x00, 0x21, 0x81,
+  0xbd, 0x90, 0x00, 0x00, 0x00, 0x00, 0x22, 0x56, 0x0d, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x23, 0x6a, 0xda, 0x10, 0x00, 0x00, 0x00, 0x00, 0x24, 0x35,
+  0xef, 0x20, 0x00, 0x00, 0x00, 0x00, 0x25, 0x4a, 0xbc, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x26, 0x15, 0xd1, 0x20, 0x00, 0x00, 0x00, 0x00, 0x27, 0x2a,
+  0x9e, 0x10, 0x00, 0x00, 0x00, 0x00, 0x27, 0xfe, 0xed, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x29, 0x0a, 0x80, 0x10, 0x00, 0x00, 0x00, 0x00, 0x29, 0xde,
+  0xcf, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x2a, 0xea, 0x62, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x2b, 0xbe, 0xb1, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x2c, 0xd3,
+  0x7e, 0x90, 0x00, 0x00, 0x00, 0x00, 0x2d, 0x9e, 0x93, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x2e, 0xb3, 0x60, 0x90, 0x00, 0x00, 0x00, 0x00, 0x2f, 0x7e,
+  0x75, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x30, 0x93, 0x42, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x31, 0x67, 0x92, 0x20, 0x00, 0x00, 0x00, 0x00, 0x32, 0x73,
+  0x24, 0x90, 0x00, 0x00, 0x00, 0x00, 0x33, 0x47, 0x74, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x34, 0x53, 0x06, 0x90, 0x00, 0x00, 0x00, 0x00, 0x35, 0x27,
+  0x56, 0x20, 0x00, 0x00, 0x00, 0x00, 0x36, 0x32, 0xe8, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x37, 0x07, 0x38, 0x20, 0x00, 0x00, 0x00, 0x00, 0x38, 0x1c,
+  0x05, 0x10, 0x00, 0x00, 0x00, 0x00, 0x38, 0xe7, 0x1a, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x39, 0xfb, 0xe7, 0x10, 0x00, 0x00, 0x00, 0x00, 0x3a, 0xc6,
+  0xfc, 0x20, 0x00, 0x00, 0x00, 0x00, 0x3b, 0xdb, 0xc9, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x3c, 0xb0, 0x18, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x3d, 0xbb,
+  0xab, 0x10, 0x00, 0x00, 0x00, 0x00, 0x3e, 0x8f, 0xfa, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x3f, 0x9b, 0x8d, 0x10, 0x00, 0x00, 0x00, 0x00, 0x40, 0x6f,
+  0xdc, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x41, 0x84, 0xa9, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x42, 0x4f, 0xbe, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x43, 0x64,
+  0x8b, 0x90, 0x00, 0x00, 0x00, 0x00, 0x44, 0x2f, 0xa0, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x45, 0x44, 0x6d, 0x90, 0x00, 0x00, 0x00, 0x00, 0x45, 0xf3,
+  0xd3, 0x20, 0x00, 0x00, 0x00, 0x00, 0x47, 0x2d, 0x8a, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x47, 0xd3, 0xb5, 0x20, 0x00, 0x00, 0x00, 0x00, 0x49, 0x0d,
+  0x6c, 0x10, 0x00, 0x00, 0x00, 0x00, 0x49, 0xb3, 0x97, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x4a, 0xed, 0x4e, 0x10, 0x00, 0x00, 0x00, 0x00, 0x4b, 0x9c,
+  0xb3, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x4c, 0xd6, 0x6a, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x4d, 0x7c, 0x95, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x4e, 0xb6,
+  0x4c, 0x90, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x5c, 0x77, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x50, 0x96, 0x2e, 0x90, 0x00, 0x00, 0x00, 0x00, 0x51, 0x3c,
+  0x59, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x52, 0x76, 0x10, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x53, 0x1c, 0x3b, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x54, 0x55,
+  0xf2, 0x90, 0x00, 0x00, 0x00, 0x00, 0x54, 0xfc, 0x1d, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x56, 0x35, 0xd4, 0x90, 0x00, 0x00, 0x00, 0x00, 0x56, 0xe5,
+  0x3a, 0x20, 0x00, 0x00, 0x00, 0x00, 0x58, 0x1e, 0xf1, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x58, 0xc5, 0x1c, 0x20, 0x00, 0x00, 0x00, 0x00, 0x59, 0xfe,
+  0xd3, 0x10, 0x00, 0x00, 0x00, 0x00, 0x5a, 0xa4, 0xfe, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x5b, 0xde, 0xb5, 0x10, 0x00, 0x00, 0x00, 0x00, 0x5c, 0x84,
+  0xe0, 0x20, 0x00, 0x00, 0x00, 0x00, 0x5d, 0xbe, 0x97, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x5e, 0x64, 0xc2, 0x20, 0x00, 0x00, 0x00, 0x00, 0x5f, 0x9e,
+  0x79, 0x10, 0x00, 0x00, 0x00, 0x00, 0x60, 0x4d, 0xde, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x61, 0x87, 0x95, 0x90, 0x00, 0x00, 0x00, 0x00, 0x62, 0x2d,
+  0xc0, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x63, 0x67, 0x77, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x64, 0x0d, 0xa2, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x65, 0x47,
+  0x59, 0x90, 0x00, 0x00, 0x00, 0x00, 0x65, 0xed, 0x84, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x67, 0x27, 0x3b, 0x90, 0x00, 0x00, 0x00, 0x00, 0x67, 0xcd,
+  0x66, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x69, 0x07, 0x1d, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x69, 0xad, 0x48, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x6a, 0xe6,
+  0xff, 0x90, 0x00, 0x00, 0x00, 0x00, 0x6b, 0x96, 0x65, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x6c, 0xd0, 0x1c, 0x10, 0x00, 0x00, 0x00, 0x00, 0x6d, 0x76,
+  0x47, 0x20, 0x00, 0x00, 0x00, 0x00, 0x6e, 0xaf, 0xfe, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x6f, 0x56, 0x29, 0x20, 0x00, 0x00, 0x00, 0x00, 0x70, 0x8f,
+  0xe0, 0x10, 0x00, 0x00, 0x00, 0x00, 0x71, 0x36, 0x0b, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x72, 0x6f, 0xc2, 0x10, 0x00, 0x00, 0x00, 0x00, 0x73, 0x15,
+  0xed, 0x20, 0x00, 0x00, 0x00, 0x00, 0x74, 0x4f, 0xa4, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x74, 0xff, 0x09, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x76, 0x38,
+  0xc0, 0x90, 0x00, 0x00, 0x00, 0x00, 0x76, 0xde, 0xeb, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x78, 0x18, 0xa2, 0x90, 0x00, 0x00, 0x00, 0x00, 0x78, 0xbe,
+  0xcd, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x79, 0xf8, 0x84, 0x90, 0x00, 0x00,
+  0x00, 0x00, 0x7a, 0x9e, 0xaf, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x7b, 0xd8,
+  0x66, 0x90, 0x00, 0x00, 0x00, 0x00, 0x7c, 0x7e, 0x91, 0xa0, 0x00, 0x00,
+  0x00, 0x00, 0x7d, 0xb8, 0x48, 0x90, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x5e,
+  0x73, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x98, 0x2a, 0x90, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x03, 0x04, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0xff, 0xff, 0x91, 0x26, 0x00, 0x00, 0xff, 0xff,
+  0x9d, 0x90, 0x01, 0x04, 0xff, 0xff, 0x8f, 0x80, 0x00, 0x08, 0xff, 0xff,
+  0x9d, 0x90, 0x01, 0x0c, 0xff, 0xff, 0x9d, 0x90, 0x01, 0x10, 0x4c, 0x4d,
+  0x54, 0x00, 0x50, 0x44, 0x54, 0x00, 0x50, 0x53, 0x54, 0x00, 0x50, 0x57,
+  0x54, 0x00, 0x50, 0x50, 0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
+  0x00, 0x00, 0x00, 0x01, 0x0a, 0x50, 0x53, 0x54, 0x38, 0x50, 0x44, 0x54,
+  0x2c, 0x4d, 0x33, 0x2e, 0x32, 0x2e, 0x30, 0x2c, 0x4d, 0x31, 0x31, 0x2e,
+  0x31, 0x2e, 0x30, 0x0a
 };
-unsigned int America_Los_Angeles_len = 2845;
+unsigned int America_Los_Angeles_len = 2836;
 unsigned char America_New_York[] = {
   0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
@@ -349,203 +348,202 @@ unsigned char America_New_York[] = {
   0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01,
   0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xed,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x14, 0xf8, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x5e, 0x03, 0xf0, 0x90,
-  0xff, 0xff, 0xff, 0xff, 0x9e, 0xa6, 0x1e, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0x9f, 0xba, 0xeb, 0x60, 0xff, 0xff, 0xff, 0xff, 0xa0, 0x86, 0x00, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xa1, 0x9a, 0xcd, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xa2, 0x65, 0xe2, 0x70, 0xff, 0xff, 0xff, 0xff, 0xa3, 0x83, 0xe9, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xa4, 0x6a, 0xae, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xa5, 0x35, 0xa7, 0x60, 0xff, 0xff, 0xff, 0xff, 0xa6, 0x53, 0xca, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xa7, 0x15, 0x89, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xa8, 0x33, 0xac, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xa8, 0xfe, 0xa5, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xaa, 0x13, 0x8e, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xaa, 0xde, 0x87, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xab, 0xf3, 0x70, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xac, 0xbe, 0x69, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xad, 0xd3, 0x52, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xae, 0x9e, 0x4b, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xaf, 0xb3, 0x34, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xb0, 0x7e, 0x2d, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xb1, 0x9c, 0x51, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xb2, 0x67, 0x4a, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xb3, 0x7c, 0x33, 0x70, 0xff, 0xff, 0xff, 0xff, 0xb4, 0x47, 0x2c, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xb5, 0x5c, 0x15, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xb6, 0x27, 0x0e, 0x60, 0xff, 0xff, 0xff, 0xff, 0xb7, 0x3b, 0xf7, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xb8, 0x06, 0xf0, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xb9, 0x1b, 0xd9, 0x70, 0xff, 0xff, 0xff, 0xff, 0xb9, 0xe6, 0xd2, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xbb, 0x04, 0xf5, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xbb, 0xc6, 0xb4, 0x60, 0xff, 0xff, 0xff, 0xff, 0xbc, 0xe4, 0xd7, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xbd, 0xaf, 0xd0, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xbe, 0xc4, 0xb9, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xbf, 0x8f, 0xb2, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xc0, 0xa4, 0x9b, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xc1, 0x6f, 0x94, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xc2, 0x84, 0x7d, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xc3, 0x4f, 0x76, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xc4, 0x64, 0x5f, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xc5, 0x2f, 0x58, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xc6, 0x4d, 0x7c, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xc7, 0x0f, 0x3a, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xc8, 0x2d, 0x5e, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xc8, 0xf8, 0x57, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xca, 0x0d, 0x40, 0x70, 0xff, 0xff, 0xff, 0xff, 0xca, 0xd8, 0x39, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xcb, 0x88, 0xf0, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xd2, 0x23, 0xf4, 0x70, 0xff, 0xff, 0xff, 0xff, 0xd2, 0x60, 0xfb, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xd3, 0x75, 0xe4, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xd4, 0x40, 0xdd, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xd5, 0x55, 0xc6, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xd6, 0x20, 0xbf, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xd7, 0x35, 0xa8, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xd8, 0x00, 0xa1, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xd9, 0x15, 0x8a, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xd9, 0xe0, 0x83, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xda, 0xfe, 0xa7, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xdb, 0xc0, 0x65, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xdc, 0xde, 0x89, 0x70, 0xff, 0xff, 0xff, 0xff, 0xdd, 0xa9, 0x82, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xde, 0xbe, 0x6b, 0x70, 0xff, 0xff, 0xff, 0xff,
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-  0x2e, 0x31, 0x2e, 0x30, 0x0a
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+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
+  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0xff, 0xff, 0xba, 0x9e,
+  0x00, 0x00, 0xff, 0xff, 0xc7, 0xc0, 0x01, 0x04, 0xff, 0xff, 0xb9, 0xb0,
+  0x00, 0x08, 0xff, 0xff, 0xc7, 0xc0, 0x01, 0x0c, 0xff, 0xff, 0xc7, 0xc0,
+  0x01, 0x10, 0x4c, 0x4d, 0x54, 0x00, 0x45, 0x44, 0x54, 0x00, 0x45, 0x53,
+  0x54, 0x00, 0x45, 0x57, 0x54, 0x00, 0x45, 0x50, 0x54, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x0a, 0x45, 0x53, 0x54,
+  0x35, 0x45, 0x44, 0x54, 0x2c, 0x4d, 0x33, 0x2e, 0x32, 0x2e, 0x30, 0x2c,
+  0x4d, 0x31, 0x31, 0x2e, 0x31, 0x2e, 0x30, 0x0a
 };
-unsigned int America_New_York_len = 3545;
+unsigned int America_New_York_len = 3536;
 unsigned char Australia_Sydney[] = {
   0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x0e, 0x80, 0x00, 0x00, 0x00,
-  0x9c, 0x4e, 0xa6, 0x9c, 0x9c, 0xbc, 0x20, 0xf0, 0xcb, 0x54, 0xb3, 0x00,
-  0xcb, 0xc7, 0x57, 0x70, 0xcc, 0xb7, 0x56, 0x80, 0xcd, 0xa7, 0x39, 0x70,
-  0xce, 0xa0, 0x73, 0x00, 0xcf, 0x87, 0x1b, 0x70, 0x03, 0x70, 0x39, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e,
+  0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x0e, 0x80, 0x00, 0x00, 0x00,
+  0x9c, 0x4e, 0xc2, 0x80, 0x9c, 0xbc, 0x2f, 0x00, 0xcb, 0x54, 0xb3, 0x00,
+  0xcb, 0xc7, 0x65, 0x80, 0xcc, 0xb7, 0x56, 0x80, 0xcd, 0xa7, 0x47, 0x80,
+  0xce, 0xa0, 0x73, 0x00, 0xcf, 0x87, 0x29, 0x80, 0x03, 0x70, 0x39, 0x80,
   0x04, 0x0d, 0x1c, 0x00, 0x05, 0x50, 0x1b, 0x80, 0x05, 0xf6, 0x38, 0x80,
   0x07, 0x2f, 0xfd, 0x80, 0x07, 0xd6, 0x1a, 0x80, 0x09, 0x0f, 0xdf, 0x80,
   0x09, 0xb5, 0xfc, 0x80, 0x0a, 0xef, 0xc1, 0x80, 0x0b, 0x9f, 0x19, 0x00,
@@ -590,140 +588,137 @@ unsigned char Australia_Sydney[] = {
   0x77, 0xe9, 0x8f, 0x00, 0x78, 0xd9, 0x80, 0x00, 0x79, 0xc9, 0x71, 0x00,
   0x7a, 0xb9, 0x62, 0x00, 0x7b, 0xb2, 0x8d, 0x80, 0x7c, 0xa2, 0x7e, 0x80,
   0x7d, 0x92, 0x6f, 0x80, 0x7e, 0x82, 0x60, 0x80, 0x7f, 0x72, 0x51, 0x80,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03,
-  0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x00, 0x00,
+  0x03, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x00, 0x00,
   0x8d, 0xc4, 0x00, 0x00, 0x00, 0x00, 0x9a, 0xb0, 0x01, 0x04, 0x00, 0x00,
-  0x8c, 0xa0, 0x00, 0x09, 0x00, 0x00, 0x9a, 0xb0, 0x01, 0x04, 0x00, 0x00,
-  0x8c, 0xa0, 0x00, 0x09, 0x4c, 0x4d, 0x54, 0x00, 0x41, 0x45, 0x44, 0x54,
-  0x00, 0x41, 0x45, 0x53, 0x54, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00,
+  0x8c, 0xa0, 0x00, 0x09, 0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09, 0x4c, 0x4d,
+  0x54, 0x00, 0x41, 0x45, 0x44, 0x54, 0x00, 0x41, 0x45, 0x53, 0x54, 0x00,
+  0x00, 0x01, 0x01, 0x00, 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x8f, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x0e,
-  0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
-  0x73, 0x16, 0x7f, 0x3c, 0xff, 0xff, 0xff, 0xff, 0x9c, 0x4e, 0xa6, 0x9c,
-  0xff, 0xff, 0xff, 0xff, 0x9c, 0xbc, 0x20, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xcb, 0x54, 0xb3, 0x00, 0xff, 0xff, 0xff, 0xff, 0xcb, 0xc7, 0x57, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xcc, 0xb7, 0x56, 0x80, 0xff, 0xff, 0xff, 0xff,
-  0xcd, 0xa7, 0x39, 0x70, 0xff, 0xff, 0xff, 0xff, 0xce, 0xa0, 0x73, 0x00,
-  0xff, 0xff, 0xff, 0xff, 0xcf, 0x87, 0x1b, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x03, 0x70, 0x39, 0x80, 0x00, 0x00, 0x00, 0x00, 0x04, 0x0d, 0x1c, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x05, 0x50, 0x1b, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x05, 0xf6, 0x38, 0x80, 0x00, 0x00, 0x00, 0x00, 0x07, 0x2f, 0xfd, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x07, 0xd6, 0x1a, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x09, 0x0f, 0xdf, 0x80, 0x00, 0x00, 0x00, 0x00, 0x09, 0xb5, 0xfc, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x0a, 0xef, 0xc1, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x0b, 0x9f, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0xd8, 0xde, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x0d, 0x7e, 0xfb, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x0e, 0xb8, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x5e, 0xdd, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x10, 0x98, 0xa2, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x11, 0x3e, 0xbf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x78, 0x84, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x13, 0x1e, 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x14, 0x58, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, 0xfe, 0x83, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x16, 0x38, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x17, 0x0c, 0x89, 0x80, 0x00, 0x00, 0x00, 0x00, 0x18, 0x21, 0x64, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x18, 0xc7, 0x81, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x1a, 0x01, 0x46, 0x80, 0x00, 0x00, 0x00, 0x00, 0x1a, 0xa7, 0x63, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x1b, 0xe1, 0x28, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x1c, 0x87, 0x45, 0x80, 0x00, 0x00, 0x00, 0x00, 0x1d, 0xc1, 0x0a, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x1e, 0x79, 0x9c, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x1f, 0x97, 0xb2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x59, 0x7e, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x21, 0x80, 0xce, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x22, 0x42, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x23, 0x69, 0xeb, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x24, 0x22, 0x7d, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x25, 0x49, 0xcd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x25, 0xef, 0xea, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x27, 0x29, 0xaf, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x27, 0xcf, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x09, 0x91, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x29, 0xaf, 0xae, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x2a, 0xe9, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2b, 0x98, 0xca, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x2c, 0xd2, 0x8f, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x2d, 0x78, 0xac, 0x80, 0x00, 0x00, 0x00, 0x00, 0x2e, 0xb2, 0x71, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x2f, 0x58, 0x8e, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x30, 0x92, 0x53, 0x80, 0x00, 0x00, 0x00, 0x00, 0x31, 0x5d, 0x5a, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x32, 0x72, 0x35, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x33, 0x3d, 0x3c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x34, 0x52, 0x17, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x35, 0x1d, 0x1e, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x36, 0x31, 0xf9, 0x80, 0x00, 0x00, 0x00, 0x00, 0x36, 0xfd, 0x00, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x38, 0x1b, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x38, 0xdc, 0xe2, 0x80, 0x00, 0x00, 0x00, 0x00, 0x39, 0xa7, 0xe9, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x3a, 0xbc, 0xc4, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x3b, 0xda, 0xda, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0xa5, 0xe1, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x3d, 0xba, 0xbc, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x3e, 0x85, 0xc3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x9a, 0x9e, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x40, 0x65, 0xa5, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x41, 0x83, 0xba, 0x80, 0x00, 0x00, 0x00, 0x00, 0x42, 0x45, 0x87, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x43, 0x63, 0x9c, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x44, 0x2e, 0xa3, 0x80, 0x00, 0x00, 0x00, 0x00, 0x45, 0x43, 0x7e, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x46, 0x05, 0x4b, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x47, 0x23, 0x60, 0x80, 0x00, 0x00, 0x00, 0x00, 0x47, 0xf7, 0xa2, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x48, 0xe7, 0x93, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x49, 0xd7, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4a, 0xc7, 0x75, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x4b, 0xb7, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x4c, 0xa7, 0x57, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4d, 0x97, 0x48, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x4e, 0x87, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x4f, 0x77, 0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x70, 0x55, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x51, 0x60, 0x46, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x52, 0x50, 0x37, 0x80, 0x00, 0x00, 0x00, 0x00, 0x53, 0x40, 0x28, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x54, 0x30, 0x19, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x55, 0x20, 0x0a, 0x80, 0x00, 0x00, 0x00, 0x00, 0x56, 0x0f, 0xfb, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x56, 0xff, 0xec, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x57, 0xef, 0xdd, 0x80, 0x00, 0x00, 0x00, 0x00, 0x58, 0xdf, 0xce, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x59, 0xcf, 0xbf, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x5a, 0xbf, 0xb0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x5b, 0xb8, 0xdc, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x5c, 0xa8, 0xcd, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x5d, 0x98, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5e, 0x88, 0xaf, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x5f, 0x78, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x60, 0x68, 0x91, 0x00, 0x00, 0x00, 0x00, 0x00, 0x61, 0x58, 0x82, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x62, 0x48, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x63, 0x38, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x64, 0x28, 0x55, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x65, 0x18, 0x46, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x66, 0x11, 0x71, 0x80, 0x00, 0x00, 0x00, 0x00, 0x67, 0x01, 0x62, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x67, 0xf1, 0x53, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x68, 0xe1, 0x44, 0x80, 0x00, 0x00, 0x00, 0x00, 0x69, 0xd1, 0x35, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x6a, 0xc1, 0x26, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x6b, 0xb1, 0x17, 0x80, 0x00, 0x00, 0x00, 0x00, 0x6c, 0xa1, 0x08, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x6d, 0x90, 0xf9, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x6e, 0x80, 0xea, 0x80, 0x00, 0x00, 0x00, 0x00, 0x6f, 0x70, 0xdb, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x70, 0x6a, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x71, 0x59, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x72, 0x49, 0xe9, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x73, 0x39, 0xda, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x74, 0x29, 0xcb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x19, 0xbc, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x76, 0x09, 0xad, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x76, 0xf9, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x77, 0xe9, 0x8f, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x78, 0xd9, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x79, 0xc9, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7a, 0xb9, 0x62, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x7b, 0xb2, 0x8d, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x7c, 0xa2, 0x7e, 0x80, 0x00, 0x00, 0x00, 0x00, 0x7d, 0x92, 0x6f, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x7e, 0x82, 0x60, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x7f, 0x72, 0x51, 0x80, 0x00, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x00, 0x00, 0x8d, 0xc4, 0x00, 0x00, 0x00, 0x00, 0x9a,
-  0xb0, 0x01, 0x04, 0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09, 0x00, 0x00, 0x9a,
-  0xb0, 0x01, 0x04, 0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09, 0x4c, 0x4d, 0x54,
-  0x00, 0x41, 0x45, 0x44, 0x54, 0x00, 0x41, 0x45, 0x53, 0x54, 0x00, 0x00,
-  0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x41, 0x45,
-  0x53, 0x54, 0x2d, 0x31, 0x30, 0x41, 0x45, 0x44, 0x54, 0x2c, 0x4d, 0x31,
-  0x30, 0x2e, 0x31, 0x2e, 0x30, 0x2c, 0x4d, 0x34, 0x2e, 0x31, 0x2e, 0x30,
-  0x2f, 0x33, 0x0a
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x0e,
+  0xff, 0xff, 0xff, 0xff, 0x73, 0x16, 0x7f, 0x3c, 0xff, 0xff, 0xff, 0xff,
+  0x9c, 0x4e, 0xc2, 0x80, 0xff, 0xff, 0xff, 0xff, 0x9c, 0xbc, 0x2f, 0x00,
+  0xff, 0xff, 0xff, 0xff, 0xcb, 0x54, 0xb3, 0x00, 0xff, 0xff, 0xff, 0xff,
+  0xcb, 0xc7, 0x65, 0x80, 0xff, 0xff, 0xff, 0xff, 0xcc, 0xb7, 0x56, 0x80,
+  0xff, 0xff, 0xff, 0xff, 0xcd, 0xa7, 0x47, 0x80, 0xff, 0xff, 0xff, 0xff,
+  0xce, 0xa0, 0x73, 0x00, 0xff, 0xff, 0xff, 0xff, 0xcf, 0x87, 0x29, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x03, 0x70, 0x39, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x04, 0x0d, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x50, 0x1b, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x05, 0xf6, 0x38, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x07, 0x2f, 0xfd, 0x80, 0x00, 0x00, 0x00, 0x00, 0x07, 0xd6, 0x1a, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x09, 0x0f, 0xdf, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x09, 0xb5, 0xfc, 0x80, 0x00, 0x00, 0x00, 0x00, 0x0a, 0xef, 0xc1, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x0b, 0x9f, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x0c, 0xd8, 0xde, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x7e, 0xfb, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x0e, 0xb8, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x0f, 0x5e, 0xdd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x98, 0xa2, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x11, 0x3e, 0xbf, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x12, 0x78, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x1e, 0xa1, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x14, 0x58, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x14, 0xfe, 0x83, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x38, 0x48, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x17, 0x0c, 0x89, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x18, 0x21, 0x64, 0x80, 0x00, 0x00, 0x00, 0x00, 0x18, 0xc7, 0x81, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x1a, 0x01, 0x46, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x1a, 0xa7, 0x63, 0x80, 0x00, 0x00, 0x00, 0x00, 0x1b, 0xe1, 0x28, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x1c, 0x87, 0x45, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x1d, 0xc1, 0x0a, 0x80, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x79, 0x9c, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x1f, 0x97, 0xb2, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x20, 0x59, 0x7e, 0x80, 0x00, 0x00, 0x00, 0x00, 0x21, 0x80, 0xce, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x22, 0x42, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x23, 0x69, 0xeb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x22, 0x7d, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x25, 0x49, 0xcd, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x25, 0xef, 0xea, 0x00, 0x00, 0x00, 0x00, 0x00, 0x27, 0x29, 0xaf, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x27, 0xcf, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x29, 0x09, 0x91, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0xaf, 0xae, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x2a, 0xe9, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x2b, 0x98, 0xca, 0x80, 0x00, 0x00, 0x00, 0x00, 0x2c, 0xd2, 0x8f, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x2d, 0x78, 0xac, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x2e, 0xb2, 0x71, 0x80, 0x00, 0x00, 0x00, 0x00, 0x2f, 0x58, 0x8e, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x30, 0x92, 0x53, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x31, 0x5d, 0x5a, 0x80, 0x00, 0x00, 0x00, 0x00, 0x32, 0x72, 0x35, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x33, 0x3d, 0x3c, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x34, 0x52, 0x17, 0x80, 0x00, 0x00, 0x00, 0x00, 0x35, 0x1d, 0x1e, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x36, 0x31, 0xf9, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x36, 0xfd, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x1b, 0x16, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x38, 0xdc, 0xe2, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x39, 0xa7, 0xe9, 0x80, 0x00, 0x00, 0x00, 0x00, 0x3a, 0xbc, 0xc4, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x3b, 0xda, 0xda, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x3c, 0xa5, 0xe1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3d, 0xba, 0xbc, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x3e, 0x85, 0xc3, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x3f, 0x9a, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x65, 0xa5, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x41, 0x83, 0xba, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x42, 0x45, 0x87, 0x00, 0x00, 0x00, 0x00, 0x00, 0x43, 0x63, 0x9c, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x44, 0x2e, 0xa3, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x45, 0x43, 0x7e, 0x80, 0x00, 0x00, 0x00, 0x00, 0x46, 0x05, 0x4b, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x47, 0x23, 0x60, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x47, 0xf7, 0xa2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0xe7, 0x93, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x49, 0xd7, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x4a, 0xc7, 0x75, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4b, 0xb7, 0x66, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x4c, 0xa7, 0x57, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x4d, 0x97, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4e, 0x87, 0x39, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x4f, 0x77, 0x2a, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x50, 0x70, 0x55, 0x80, 0x00, 0x00, 0x00, 0x00, 0x51, 0x60, 0x46, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x52, 0x50, 0x37, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x53, 0x40, 0x28, 0x80, 0x00, 0x00, 0x00, 0x00, 0x54, 0x30, 0x19, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x55, 0x20, 0x0a, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x56, 0x0f, 0xfb, 0x80, 0x00, 0x00, 0x00, 0x00, 0x56, 0xff, 0xec, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x57, 0xef, 0xdd, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x58, 0xdf, 0xce, 0x80, 0x00, 0x00, 0x00, 0x00, 0x59, 0xcf, 0xbf, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x5a, 0xbf, 0xb0, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x5b, 0xb8, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5c, 0xa8, 0xcd, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x5d, 0x98, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x5e, 0x88, 0xaf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5f, 0x78, 0xa0, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x60, 0x68, 0x91, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x61, 0x58, 0x82, 0x00, 0x00, 0x00, 0x00, 0x00, 0x62, 0x48, 0x73, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x63, 0x38, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x64, 0x28, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x65, 0x18, 0x46, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x66, 0x11, 0x71, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x67, 0x01, 0x62, 0x80, 0x00, 0x00, 0x00, 0x00, 0x67, 0xf1, 0x53, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x68, 0xe1, 0x44, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x69, 0xd1, 0x35, 0x80, 0x00, 0x00, 0x00, 0x00, 0x6a, 0xc1, 0x26, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x6b, 0xb1, 0x17, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x6c, 0xa1, 0x08, 0x80, 0x00, 0x00, 0x00, 0x00, 0x6d, 0x90, 0xf9, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x6e, 0x80, 0xea, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x6f, 0x70, 0xdb, 0x80, 0x00, 0x00, 0x00, 0x00, 0x70, 0x6a, 0x07, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x71, 0x59, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x72, 0x49, 0xe9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x73, 0x39, 0xda, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x74, 0x29, 0xcb, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x75, 0x19, 0xbc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x76, 0x09, 0xad, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x76, 0xf9, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x77, 0xe9, 0x8f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0xd9, 0x80, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x79, 0xc9, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x7a, 0xb9, 0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0xb2, 0x8d, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x7c, 0xa2, 0x7e, 0x80, 0x00, 0x00, 0x00, 0x00,
+  0x7d, 0x92, 0x6f, 0x80, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x82, 0x60, 0x80,
+  0x00, 0x00, 0x00, 0x00, 0x7f, 0x72, 0x51, 0x80, 0x03, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
+  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x00, 0x00, 0x8d, 0xc4, 0x00, 0x00,
+  0x00, 0x00, 0x9a, 0xb0, 0x01, 0x04, 0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09,
+  0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09, 0x4c, 0x4d, 0x54, 0x00, 0x41, 0x45,
+  0x44, 0x54, 0x00, 0x41, 0x45, 0x53, 0x54, 0x00, 0x00, 0x01, 0x01, 0x00,
+  0x0a, 0x41, 0x45, 0x53, 0x54, 0x2d, 0x31, 0x30, 0x41, 0x45, 0x44, 0x54,
+  0x2c, 0x4d, 0x31, 0x30, 0x2e, 0x31, 0x2e, 0x30, 0x2c, 0x4d, 0x34, 0x2e,
+  0x31, 0x2e, 0x30, 0x2f, 0x33, 0x0a
 };
-unsigned int Australia_Sydney_len = 2223;
+unsigned int Australia_Sydney_len = 2190;
diff --git a/third_party/abseil-cpp/absl/time/time.cc b/third_party/abseil-cpp/absl/time/time.cc
index 1ec2026e25..7256a699d2 100644
--- a/third_party/abseil-cpp/absl/time/time.cc
+++ b/third_party/abseil-cpp/absl/time/time.cc
@@ -297,7 +297,7 @@ timespec ToTimespec(Time t) {
   timespec ts;
   absl::Duration d = time_internal::ToUnixDuration(t);
   if (!time_internal::IsInfiniteDuration(d)) {
-    ts.tv_sec = time_internal::GetRepHi(d);
+    ts.tv_sec = static_cast<decltype(ts.tv_sec)>(time_internal::GetRepHi(d));
     if (ts.tv_sec == time_internal::GetRepHi(d)) {  // no time_t narrowing
       ts.tv_nsec = time_internal::GetRepLo(d) / 4;  // floor
       return ts;
@@ -316,7 +316,7 @@ timespec ToTimespec(Time t) {
 timeval ToTimeval(Time t) {
   timeval tv;
   timespec ts = absl::ToTimespec(t);
-  tv.tv_sec = ts.tv_sec;
+  tv.tv_sec = static_cast<decltype(tv.tv_sec)>(ts.tv_sec);
   if (tv.tv_sec != ts.tv_sec) {  // narrowing
     if (ts.tv_sec < 0) {
       tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::min();
diff --git a/third_party/abseil-cpp/absl/time/time.h b/third_party/abseil-cpp/absl/time/time.h
index 5abd815a79..11796b4f0c 100644
--- a/third_party/abseil-cpp/absl/time/time.h
+++ b/third_party/abseil-cpp/absl/time/time.h
@@ -120,7 +120,7 @@ using EnableIfFloat =
 
 // Duration
 //
-// The `absl::Duration` class represents a signed, fixed-length span of time.
+// The `absl::Duration` class represents a signed, fixed-length amount of time.
 // A `Duration` is generated using a unit-specific factory function, or is
 // the result of subtracting one `absl::Time` from another. Durations behave
 // like unit-safe integers and they support all the natural integer-like
@@ -162,7 +162,7 @@ class Duration {
   constexpr Duration() : rep_hi_(0), rep_lo_(0) {}  // zero-length duration
 
   // Copyable.
-#if !defined(__clang__) && defined(_MSC_VER) && _MSC_VER < 1910
+#if !defined(__clang__) && defined(_MSC_VER) && _MSC_VER < 1930
   // Explicitly defining the constexpr copy constructor avoids an MSVC bug.
   constexpr Duration(const Duration& d)
       : rep_hi_(d.rep_hi_), rep_lo_(d.rep_lo_) {}
@@ -495,7 +495,7 @@ ABSL_ATTRIBUTE_PURE_FUNCTION int64_t ToInt64Seconds(Duration d);
 ABSL_ATTRIBUTE_PURE_FUNCTION int64_t ToInt64Minutes(Duration d);
 ABSL_ATTRIBUTE_PURE_FUNCTION int64_t ToInt64Hours(Duration d);
 
-// ToDoubleNanoSeconds()
+// ToDoubleNanoseconds()
 // ToDoubleMicroseconds()
 // ToDoubleMilliseconds()
 // ToDoubleSeconds()
@@ -579,7 +579,7 @@ bool ParseDuration(absl::string_view dur_string, Duration* d);
 
 // AbslParseFlag()
 //
-// Parses a command-line flag string representation `text` into a a Duration
+// Parses a command-line flag string representation `text` into a Duration
 // value. Duration flags must be specified in a format that is valid input for
 // `absl::ParseDuration()`.
 bool AbslParseFlag(absl::string_view text, Duration* dst, std::string* error);
@@ -750,23 +750,24 @@ constexpr Time UnixEpoch() { return Time(); }
 constexpr Time UniversalEpoch() {
   // 719162 is the number of days from 0001-01-01 to 1970-01-01,
   // assuming the Gregorian calendar.
-  return Time(time_internal::MakeDuration(-24 * 719162 * int64_t{3600}, 0U));
+  return Time(
+      time_internal::MakeDuration(-24 * 719162 * int64_t{3600}, uint32_t{0}));
 }
 
 // InfiniteFuture()
 //
 // Returns an `absl::Time` that is infinitely far in the future.
 constexpr Time InfiniteFuture() {
-  return Time(
-      time_internal::MakeDuration((std::numeric_limits<int64_t>::max)(), ~0U));
+  return Time(time_internal::MakeDuration((std::numeric_limits<int64_t>::max)(),
+                                          ~uint32_t{0}));
 }
 
 // InfinitePast()
 //
 // Returns an `absl::Time` that is infinitely far in the past.
 constexpr Time InfinitePast() {
-  return Time(
-      time_internal::MakeDuration((std::numeric_limits<int64_t>::min)(), ~0U));
+  return Time(time_internal::MakeDuration((std::numeric_limits<int64_t>::min)(),
+                                          ~uint32_t{0}));
 }
 
 // FromUnixNanos()
@@ -1422,14 +1423,17 @@ constexpr int64_t GetRepHi(Duration d) { return d.rep_hi_; }
 constexpr uint32_t GetRepLo(Duration d) { return d.rep_lo_; }
 
 // Returns true iff d is positive or negative infinity.
-constexpr bool IsInfiniteDuration(Duration d) { return GetRepLo(d) == ~0U; }
+constexpr bool IsInfiniteDuration(Duration d) {
+  return GetRepLo(d) == ~uint32_t{0};
+}
 
 // Returns an infinite Duration with the opposite sign.
 // REQUIRES: IsInfiniteDuration(d)
 constexpr Duration OppositeInfinity(Duration d) {
   return GetRepHi(d) < 0
-             ? MakeDuration((std::numeric_limits<int64_t>::max)(), ~0U)
-             : MakeDuration((std::numeric_limits<int64_t>::min)(), ~0U);
+             ? MakeDuration((std::numeric_limits<int64_t>::max)(), ~uint32_t{0})
+             : MakeDuration((std::numeric_limits<int64_t>::min)(),
+                            ~uint32_t{0});
 }
 
 // Returns (-n)-1 (equivalently -(n+1)) without avoidable overflow.
@@ -1568,7 +1572,7 @@ constexpr Duration operator-(Duration d) {
 
 constexpr Duration InfiniteDuration() {
   return time_internal::MakeDuration((std::numeric_limits<int64_t>::max)(),
-                                     ~0U);
+                                     ~uint32_t{0});
 }
 
 constexpr Duration FromChrono(const std::chrono::nanoseconds& d) {
diff --git a/third_party/abseil-cpp/absl/time/time_test.cc b/third_party/abseil-cpp/absl/time/time_test.cc
index cde9423feb..d235e9ad0a 100644
--- a/third_party/abseil-cpp/absl/time/time_test.cc
+++ b/third_party/abseil-cpp/absl/time/time_test.cc
@@ -377,6 +377,11 @@ TEST(Time, FloorConversion) {
 }
 
 TEST(Time, RoundtripConversion) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
 #define TEST_CONVERSION_ROUND_TRIP(SOURCE, FROM, TO, MATCHER) \
   EXPECT_THAT(TO(FROM(SOURCE)), MATCHER(SOURCE))
 
@@ -558,6 +563,11 @@ TEST(Time, FromChrono) {
 }
 
 TEST(Time, ToChronoTime) {
+#if defined(ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT) && \
+    ABSL_SKIP_TIME_TESTS_BROKEN_ON_MSVC_OPT
+  GTEST_SKIP();
+#endif
+
   EXPECT_EQ(std::chrono::system_clock::from_time_t(-1),
             absl::ToChronoTime(absl::FromTimeT(-1)));
   EXPECT_EQ(std::chrono::system_clock::from_time_t(0),
diff --git a/third_party/abseil-cpp/absl/types/BUILD.bazel b/third_party/abseil-cpp/absl/types/BUILD.bazel
index 38ed228679..bb80101268 100644
--- a/third_party/abseil-cpp/absl/types/BUILD.bazel
+++ b/third_party/abseil-cpp/absl/types/BUILD.bazel
@@ -314,6 +314,7 @@ cc_library(
     name = "compare",
     hdrs = ["compare.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:core_headers",
         "//absl/meta:type_traits",
diff --git a/third_party/abseil-cpp/absl/types/BUILD.gn b/third_party/abseil-cpp/absl/types/BUILD.gn
new file mode 100644
index 0000000000..210cdbff70
--- /dev/null
+++ b/third_party/abseil-cpp/absl/types/BUILD.gn
@@ -0,0 +1,115 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build_overrides/build.gni")
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("any") {
+  public = [ "any.h" ]
+  public_deps = [
+    ":bad_any_cast",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:fast_type_id",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("bad_any_cast") {
+  public = [ "bad_any_cast.h" ]
+  deps = [ ":bad_any_cast_impl" ]
+  public_deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+}
+
+absl_source_set("bad_any_cast_impl") {
+  sources = [ "bad_any_cast.cc" ]
+  public = [ "bad_any_cast.h" ]
+  public_deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:raw_logging_internal" ]
+  visibility = [ ":*" ]
+}
+
+absl_source_set("span") {
+  public = [ "span.h" ]
+  sources = [ "internal/span.h" ]
+  public_deps = [
+    "//third_party/abseil-cpp/absl/algorithm",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/base:throw_delegate",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_source_set("optional") {
+  sources = [ "internal/optional.h" ]
+  public = [ "optional.h" ]
+  public_deps = [
+    ":bad_optional_access",
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("bad_optional_access") {
+  sources = [ "bad_optional_access.cc" ]
+  public = [ "bad_optional_access.h" ]
+  public_deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:raw_logging_internal" ]
+}
+
+absl_source_set("bad_variant_access") {
+  sources = [ "bad_variant_access.cc" ]
+  public = [ "bad_variant_access.h" ]
+  public_deps = [ "//third_party/abseil-cpp/absl/base:config" ]
+  deps = [ "//third_party/abseil-cpp/absl/base:raw_logging_internal" ]
+}
+
+absl_source_set("variant") {
+  sources = [ "internal/variant.h" ]
+  public = [ "variant.h" ]
+  public_deps = [
+    ":bad_variant_access",
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/utility",
+  ]
+}
+
+absl_source_set("compare") {
+  public = [ "compare.h" ]
+  public_deps = [
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
+
+absl_test("optional_test") {
+  sources = [ "optional_test.cc" ]
+  deps = [
+    ":optional",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:raw_logging_internal",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
+
+absl_test("variant_test") {
+  sources = [ "variant_test.cc" ]
+  deps = [
+    ":variant",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/base:core_headers",
+    "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+    "//third_party/abseil-cpp/absl/strings",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/types/CMakeLists.txt b/third_party/abseil-cpp/absl/types/CMakeLists.txt
index d7e8614e0d..830953aece 100644
--- a/third_party/abseil-cpp/absl/types/CMakeLists.txt
+++ b/third_party/abseil-cpp/absl/types/CMakeLists.txt
@@ -43,6 +43,7 @@ absl_cc_library(
   PUBLIC
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     bad_any_cast_impl
@@ -239,6 +240,7 @@ absl_cc_test(
     GTest::gmock_main
 )
 
+# Internal-only target, do not depend on directly.
 absl_cc_library(
   NAME
     conformance_testing
diff --git a/third_party/abseil-cpp/absl/types/any.h b/third_party/abseil-cpp/absl/types/any.h
index fc5a07469f..204da26db8 100644
--- a/third_party/abseil-cpp/absl/types/any.h
+++ b/third_party/abseil-cpp/absl/types/any.h
@@ -81,18 +81,9 @@ ABSL_NAMESPACE_END
 #include <utility>
 
 #include "absl/base/internal/fast_type_id.h"
-#include "absl/base/macros.h"
 #include "absl/meta/type_traits.h"
 #include "absl/types/bad_any_cast.h"
 
-// NOTE: This macro is an implementation detail that is undefined at the bottom
-// of the file. It is not intended for expansion directly from user code.
-#ifdef ABSL_ANY_DETAIL_HAS_RTTI
-#error ABSL_ANY_DETAIL_HAS_RTTI cannot be directly set
-#elif !defined(__GNUC__) || defined(__GXX_RTTI)
-#define ABSL_ANY_DETAIL_HAS_RTTI 1
-#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
-
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
@@ -348,7 +339,7 @@ class any {
   // returns `false`.
   bool has_value() const noexcept { return obj_ != nullptr; }
 
-#if ABSL_ANY_DETAIL_HAS_RTTI
+#ifdef ABSL_INTERNAL_HAS_RTTI
   // Returns: typeid(T) if *this has a contained object of type T, otherwise
   // typeid(void).
   const std::type_info& type() const noexcept {
@@ -358,7 +349,7 @@ class any {
 
     return typeid(void);
   }
-#endif  // ABSL_ANY_DETAIL_HAS_RTTI
+#endif  // ABSL_INTERNAL_HAS_RTTI
 
  private:
   // Tagged type-erased abstraction for holding a cloneable object.
@@ -367,9 +358,9 @@ class any {
     virtual ~ObjInterface() = default;
     virtual std::unique_ptr<ObjInterface> Clone() const = 0;
     virtual const void* ObjTypeId() const noexcept = 0;
-#if ABSL_ANY_DETAIL_HAS_RTTI
+#ifdef ABSL_INTERNAL_HAS_RTTI
     virtual const std::type_info& Type() const noexcept = 0;
-#endif  // ABSL_ANY_DETAIL_HAS_RTTI
+#endif  // ABSL_INTERNAL_HAS_RTTI
   };
 
   // Hold a value of some queryable type, with an ability to Clone it.
@@ -386,9 +377,9 @@ class any {
 
     const void* ObjTypeId() const noexcept final { return IdForType<T>(); }
 
-#if ABSL_ANY_DETAIL_HAS_RTTI
+#ifdef ABSL_INTERNAL_HAS_RTTI
     const std::type_info& Type() const noexcept final { return typeid(T); }
-#endif  // ABSL_ANY_DETAIL_HAS_RTTI
+#endif  // ABSL_INTERNAL_HAS_RTTI
 
     T value;
   };
@@ -521,8 +512,6 @@ T* any_cast(any* operand) noexcept {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#undef ABSL_ANY_DETAIL_HAS_RTTI
-
 #endif  // ABSL_USES_STD_ANY
 
 #endif  // ABSL_TYPES_ANY_H_
diff --git a/third_party/abseil-cpp/absl/types/any_test.cc b/third_party/abseil-cpp/absl/types/any_test.cc
index 70e4ba22b1..d382b927c2 100644
--- a/third_party/abseil-cpp/absl/types/any_test.cc
+++ b/third_party/abseil-cpp/absl/types/any_test.cc
@@ -754,26 +754,23 @@ TEST(AnyTest, FailedCopy) {
 
 // Test the guarantees regarding exceptions in emplace.
 TEST(AnyTest, FailedEmplace) {
-  {
-    BadCopyable bad;
-    absl::any target;
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad));
-  }
+  BadCopyable bad;
+  absl::any target;
+  ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad));
+}
 
-  {
-    BadCopyable bad;
-    absl::any target(absl::in_place_type<int>);
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad));
-#if defined(ABSL_USES_STD_ANY) && defined(__GLIBCXX__)
-    // libstdc++ std::any::emplace() implementation (as of 7.2) has a bug: if an
-    // exception is thrown, *this contains a value.
-#define ABSL_GLIBCXX_ANY_EMPLACE_EXCEPTION_BUG 1
-#endif
-#if defined(ABSL_HAVE_EXCEPTIONS) && \
-    !defined(ABSL_GLIBCXX_ANY_EMPLACE_EXCEPTION_BUG)
-    EXPECT_FALSE(target.has_value());
+// GCC and Clang have a bug here.
+// Ine some cases, the exception seems to be thrown at the wrong time, and
+// target may contain a value.
+#ifdef __GNUC__
+TEST(AnyTest, DISABLED_FailedEmplaceInPlace) {
+#else
+TEST(AnyTest, FailedEmplaceInPlace) {
 #endif
-  }
+  BadCopyable bad;
+  absl::any target(absl::in_place_type<int>);
+  ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad));
+  EXPECT_FALSE(target.has_value());
 }
 
 }  // namespace
diff --git a/third_party/abseil-cpp/absl/types/internal/conformance_profile.h b/third_party/abseil-cpp/absl/types/internal/conformance_profile.h
index cf64ff4fcd..37b017db47 100644
--- a/third_party/abseil-cpp/absl/types/internal/conformance_profile.h
+++ b/third_party/abseil-cpp/absl/types/internal/conformance_profile.h
@@ -719,6 +719,7 @@ struct SyntacticConformanceProfileOf {
                                                          type##_support); \
   ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL(bool, is_##type)
 
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
 ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(default_constructible);
 ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(move_constructible);
 ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(copy_constructible);
@@ -733,6 +734,7 @@ ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(greater_equal_comparable);
 ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(greater_than_comparable);
 ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(swappable);
 ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(hashable);
+#endif
 
 #undef ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF
 #undef ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL
diff --git a/third_party/abseil-cpp/absl/types/internal/optional.h b/third_party/abseil-cpp/absl/types/internal/optional.h
index 92932b6001..6ed0c6699c 100644
--- a/third_party/abseil-cpp/absl/types/internal/optional.h
+++ b/third_party/abseil-cpp/absl/types/internal/optional.h
@@ -91,7 +91,15 @@ class optional_data_dtor_base {
 
   void destruct() noexcept {
     if (engaged_) {
+      // `data_` must be initialized if `engaged_` is true.
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
       data_.~T();
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic pop
+#endif
       engaged_ = false;
     }
   }
diff --git a/third_party/abseil-cpp/absl/types/internal/span.h b/third_party/abseil-cpp/absl/types/internal/span.h
index 112612f4bd..1920a89e46 100644
--- a/third_party/abseil-cpp/absl/types/internal/span.h
+++ b/third_party/abseil-cpp/absl/types/internal/span.h
@@ -28,6 +28,9 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
+template <typename T>
+class Span;
+
 namespace span_internal {
 // A constexpr min function
 constexpr size_t Min(size_t a, size_t b) noexcept { return a < b ? a : b; }
@@ -121,6 +124,36 @@ struct IsConvertible : IsConvertibleHelper<From, To>::type {};
 template <typename From, typename To>
 using EnableIfConvertibleTo =
     typename std::enable_if<IsConvertible<From, To>::value>::type;
+
+// IsView is true for types where the return type of .data() is the same for
+// mutable and const instances. This isn't foolproof, but it's only used to
+// enable a compiler warning.
+template <typename T, typename = void, typename = void>
+struct IsView {
+  static constexpr bool value = false;
+};
+
+template <typename T>
+struct IsView<
+    T, absl::void_t<decltype(span_internal::GetData(std::declval<const T&>()))>,
+    absl::void_t<decltype(span_internal::GetData(std::declval<T&>()))>> {
+ private:
+  using Container = std::remove_const_t<T>;
+  using ConstData =
+      decltype(span_internal::GetData(std::declval<const Container&>()));
+  using MutData = decltype(span_internal::GetData(std::declval<Container&>()));
+ public:
+  static constexpr bool value = std::is_same<ConstData, MutData>::value;
+};
+
+// These enablers result in 'int' so they can be used as typenames or defaults
+// in template paramters lists.
+template <typename T>
+using EnableIfIsView = std::enable_if_t<IsView<T>::value, int>;
+
+template <typename T>
+using EnableIfNotIsView = std::enable_if_t<!IsView<T>::value, int>;
+
 }  // namespace span_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/third_party/abseil-cpp/absl/types/internal/variant.h b/third_party/abseil-cpp/absl/types/internal/variant.h
index 772008c74e..c82ded44f8 100644
--- a/third_party/abseil-cpp/absl/types/internal/variant.h
+++ b/third_party/abseil-cpp/absl/types/internal/variant.h
@@ -16,8 +16,8 @@
 // separate file to avoid cluttering the top of the API header with
 // implementation details.
 
-#ifndef ABSL_TYPES_variant_internal_H_
-#define ABSL_TYPES_variant_internal_H_
+#ifndef ABSL_TYPES_INTERNAL_VARIANT_H_
+#define ABSL_TYPES_INTERNAL_VARIANT_H_
 
 #include <cassert>
 #include <cstddef>
@@ -449,7 +449,7 @@ struct FlattenIndices;
 
 template <std::size_t HeadSize, std::size_t... TailSize>
 struct FlattenIndices<HeadSize, TailSize...> {
-  template<class... SizeType>
+  template <class... SizeType>
   static constexpr std::size_t Run(std::size_t head, SizeType... tail) {
     return head + HeadSize * FlattenIndices<TailSize...>::Run(tail...);
   }
@@ -498,8 +498,8 @@ struct VisitIndicesVariadicImpl<absl::index_sequence<N...>, EndIndices...> {
   };
 
   template <class Op, class... SizeType>
-  static VisitIndicesResultT<Op, decltype(EndIndices)...> Run(
-      Op&& op, SizeType... i) {
+  static VisitIndicesResultT<Op, decltype(EndIndices)...> Run(Op&& op,
+                                                              SizeType... i) {
     return VisitIndicesSwitch<NumCasesOfSwitch<EndIndices...>::value>::Run(
         FlattenedOp<Op>{absl::forward<Op>(op)},
         FlattenIndices<(EndIndices + std::size_t{1})...>::Run(
@@ -683,13 +683,13 @@ struct VariantCoreAccess {
         variant_internal::IndexOfConstructedType<Left, QualifiedNew>;
 
     void operator()(SizeT<NewIndex::value> /*old_i*/
-                    ) const {
+    ) const {
       Access<NewIndex::value>(*left) = absl::forward<QualifiedNew>(other);
     }
 
     template <std::size_t OldIndex>
     void operator()(SizeT<OldIndex> /*old_i*/
-                    ) const {
+    ) const {
       using New =
           typename absl::variant_alternative<NewIndex::value, Left>::type;
       if (std::is_nothrow_constructible<New, QualifiedNew>::value ||
@@ -868,18 +868,6 @@ struct IsNeitherSelfNorInPlace<Self, in_place_type_t<T>> : std::false_type {};
 template <class Self, std::size_t I>
 struct IsNeitherSelfNorInPlace<Self, in_place_index_t<I>> : std::false_type {};
 
-template <class Variant, class T, class = void>
-struct ConversionIsPossibleImpl : std::false_type {};
-
-template <class Variant, class T>
-struct ConversionIsPossibleImpl<
-    Variant, T,
-    void_t<decltype(ImaginaryFun<Variant>::Run(std::declval<T>(), {}))>>
-    : std::true_type {};
-
-template <class Variant, class T>
-struct ConversionIsPossible : ConversionIsPossibleImpl<Variant, T>::type {};
-
 template <class Variant, class T>
 struct IndexOfConstructedType<
     Variant, T,
@@ -1151,16 +1139,16 @@ struct VariantHelper<variant<Ts...>> {
   // Type metafunction which returns the element type selected if
   // OverloadSet::Overload() is well-formed when called with argument type U.
   template <typename U>
-  using BestMatch = decltype(
-      variant_internal::OverloadSet<Ts...>::Overload(std::declval<U>()));
+  using BestMatch = decltype(variant_internal::OverloadSet<Ts...>::Overload(
+      std::declval<U>()));
 
   // Type metafunction which returns true if OverloadSet::Overload() is
   // well-formed when called with argument type U.
   // CanAccept can't be just an alias because there is a MSVC bug on parameter
   // pack expansion involving decltype.
   template <typename U>
-  struct CanAccept :
-      std::integral_constant<bool, !std::is_void<BestMatch<U>>::value> {};
+  struct CanAccept
+      : std::integral_constant<bool, !std::is_void<BestMatch<U>>::value> {};
 
   // Type metafunction which returns true if Other is an instantiation of
   // variant, and variants's converting constructor from Other will be
@@ -1183,8 +1171,8 @@ struct TrivialMoveOnly {
 // A union's defaulted copy/move constructor is deleted if any variant member's
 // copy/move constructor is nontrivial.
 template <typename T>
-struct IsTriviallyMoveConstructible:
-  std::is_move_constructible<Union<T, TrivialMoveOnly>> {};
+struct IsTriviallyMoveConstructible
+    : std::is_move_constructible<Union<T, TrivialMoveOnly>> {};
 
 // To guarantee triviality of all special-member functions that can be trivial,
 // we use a chain of conditional bases for each one.
@@ -1419,14 +1407,14 @@ class VariantMoveAssignBaseNontrivial : protected VariantCopyBase<T...> {
   VariantMoveAssignBaseNontrivial& operator=(
       VariantMoveAssignBaseNontrivial const&) = default;
 
-    VariantMoveAssignBaseNontrivial&
-    operator=(VariantMoveAssignBaseNontrivial&& other) noexcept(
-        absl::conjunction<std::is_nothrow_move_constructible<T>...,
-                          std::is_nothrow_move_assignable<T>...>::value) {
-      VisitIndices<sizeof...(T)>::Run(
-          VariantCoreAccess::MakeMoveAssignVisitor(this, &other), other.index_);
-      return *this;
-    }
+  VariantMoveAssignBaseNontrivial&
+  operator=(VariantMoveAssignBaseNontrivial&& other) noexcept(
+      absl::conjunction<std::is_nothrow_move_constructible<T>...,
+                        std::is_nothrow_move_assignable<T>...>::value) {
+    VisitIndices<sizeof...(T)>::Run(
+        VariantCoreAccess::MakeMoveAssignVisitor(this, &other), other.index_);
+    return *this;
+  }
 
  protected:
   using Base::index_;
@@ -1450,12 +1438,12 @@ class VariantCopyAssignBaseNontrivial : protected VariantMoveAssignBase<T...> {
   VariantCopyAssignBaseNontrivial& operator=(
       VariantCopyAssignBaseNontrivial&&) = default;
 
-    VariantCopyAssignBaseNontrivial& operator=(
-        const VariantCopyAssignBaseNontrivial& other) {
-      VisitIndices<sizeof...(T)>::Run(
-          VariantCoreAccess::MakeCopyAssignVisitor(this, other), other.index_);
-      return *this;
-    }
+  VariantCopyAssignBaseNontrivial& operator=(
+      const VariantCopyAssignBaseNontrivial& other) {
+    VisitIndices<sizeof...(T)>::Run(
+        VariantCoreAccess::MakeCopyAssignVisitor(this, other), other.index_);
+    return *this;
+  }
 
  protected:
   using Base::index_;
@@ -1643,4 +1631,4 @@ ABSL_NAMESPACE_END
 }  // namespace absl
 
 #endif  // !defined(ABSL_USES_STD_VARIANT)
-#endif  // ABSL_TYPES_variant_internal_H_
+#endif  // ABSL_TYPES_INTERNAL_VARIANT_H_
diff --git a/third_party/abseil-cpp/absl/types/optional.h b/third_party/abseil-cpp/absl/types/optional.h
index 61540cfdb2..134b2aff42 100644
--- a/third_party/abseil-cpp/absl/types/optional.h
+++ b/third_party/abseil-cpp/absl/types/optional.h
@@ -282,15 +282,16 @@ class optional : private optional_internal::optional_data<T>,
   optional& operator=(optional&& src) = default;
 
   // Value assignment operators
-  template <
-      typename U = T,
-      typename = typename std::enable_if<absl::conjunction<
-          absl::negation<
-              std::is_same<optional<T>, typename std::decay<U>::type>>,
-          absl::negation<
-              absl::conjunction<std::is_scalar<T>,
-                                std::is_same<T, typename std::decay<U>::type>>>,
-          std::is_constructible<T, U>, std::is_assignable<T&, U>>::value>::type>
+  template <typename U = T,
+            int&...,  // Workaround an internal compiler error in GCC 5 to 10.
+            typename = typename std::enable_if<absl::conjunction<
+                absl::negation<
+                    std::is_same<optional<T>, typename std::decay<U>::type> >,
+                absl::negation<absl::conjunction<
+                    std::is_scalar<T>,
+                    std::is_same<T, typename std::decay<U>::type> > >,
+                std::is_constructible<T, U>,
+                std::is_assignable<T&, U> >::value>::type>
   optional& operator=(U&& v) {
     this->assign(std::forward<U>(v));
     return *this;
@@ -298,13 +299,14 @@ class optional : private optional_internal::optional_data<T>,
 
   template <
       typename U,
+      int&...,  // Workaround an internal compiler error in GCC 5 to 10.
       typename = typename std::enable_if<absl::conjunction<
-          absl::negation<std::is_same<T, U>>,
+          absl::negation<std::is_same<T, U> >,
           std::is_constructible<T, const U&>, std::is_assignable<T&, const U&>,
           absl::negation<
               optional_internal::
                   is_constructible_convertible_assignable_from_optional<
-                      T, U>>>::value>::type>
+                      T, U> > >::value>::type>
   optional& operator=(const optional<U>& rhs) {
     if (rhs) {
       this->assign(*rhs);
@@ -315,13 +317,14 @@ class optional : private optional_internal::optional_data<T>,
   }
 
   template <typename U,
+            int&...,  // Workaround an internal compiler error in GCC 5 to 10.
             typename = typename std::enable_if<absl::conjunction<
-                absl::negation<std::is_same<T, U>>, std::is_constructible<T, U>,
-                std::is_assignable<T&, U>,
+                absl::negation<std::is_same<T, U> >,
+                std::is_constructible<T, U>, std::is_assignable<T&, U>,
                 absl::negation<
                     optional_internal::
                         is_constructible_convertible_assignable_from_optional<
-                            T, U>>>::value>::type>
+                            T, U> > >::value>::type>
   optional& operator=(optional<U>&& rhs) {
     if (rhs) {
       this->assign(std::move(*rhs));
diff --git a/third_party/abseil-cpp/absl/types/optional_test.cc b/third_party/abseil-cpp/absl/types/optional_test.cc
index 7ef142cb99..21653a903e 100644
--- a/third_party/abseil-cpp/absl/types/optional_test.cc
+++ b/third_party/abseil-cpp/absl/types/optional_test.cc
@@ -27,6 +27,37 @@
 #include "absl/meta/type_traits.h"
 #include "absl/strings/string_view.h"
 
+#if defined(__cplusplus) && __cplusplus >= 202002L
+// In C++20, volatile-qualified return types are deprecated.
+#define ABSL_VOLATILE_RETURN_TYPES_DEPRECATED 1
+#endif
+
+// The following types help test an internal compiler error in GCC5 though
+// GCC10. The case OptionalTest.InternalCompilerErrorInGcc5ToGcc10 crashes the
+// compiler without a workaround. This test case should remain at the beginning
+// of the file as the internal compiler error is sensitive to other constructs
+// in this file.
+template <class T, class...>
+using GccIceHelper1 = T;
+template <typename T>
+struct GccIceHelper2 {};
+template <typename T>
+class GccIce {
+  template <typename U,
+            typename SecondTemplateArgHasToExistForSomeReason = void,
+            typename DependentType = void,
+            typename = std::is_assignable<GccIceHelper1<T, DependentType>&, U>>
+  GccIce& operator=(GccIceHelper2<U> const&) {}
+};
+
+TEST(OptionalTest, InternalCompilerErrorInGcc5ToGcc10) {
+  GccIce<int> instantiate_ice_with_same_type_as_optional;
+  static_cast<void>(instantiate_ice_with_same_type_as_optional);
+  absl::optional<int> val1;
+  absl::optional<int> val2;
+  val1 = val2;
+}
+
 struct Hashable {};
 
 namespace std {
@@ -205,6 +236,7 @@ TEST(optionalTest, CopyConstructor) {
     EXPECT_TRUE(opt42_copy);
     EXPECT_EQ(42, *opt42_copy);
   }
+#if !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   {
     absl::optional<volatile int> empty, opt42 = 42;
     absl::optional<volatile int> empty_copy(empty);
@@ -213,6 +245,7 @@ TEST(optionalTest, CopyConstructor) {
     EXPECT_TRUE(opt42_copy);
     EXPECT_EQ(42, *opt42_copy);
   }
+#endif
   // test copyablility
   EXPECT_TRUE(std::is_copy_constructible<absl::optional<int>>::value);
   EXPECT_TRUE(std::is_copy_constructible<absl::optional<Copyable>>::value);
@@ -224,18 +257,11 @@ TEST(optionalTest, CopyConstructor) {
 
   EXPECT_FALSE(
       absl::is_trivially_copy_constructible<absl::optional<Copyable>>::value);
-#if defined(ABSL_USES_STD_OPTIONAL) && defined(__GLIBCXX__)
-  // libstdc++ std::optional implementation (as of 7.2) has a bug: when T is
-  // trivially copyable, optional<T> is not trivially copyable (due to one of
-  // its base class is unconditionally nontrivial).
-#define ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG 1
-#endif
-#ifndef ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG
   EXPECT_TRUE(
       absl::is_trivially_copy_constructible<absl::optional<int>>::value);
   EXPECT_TRUE(
       absl::is_trivially_copy_constructible<absl::optional<const int>>::value);
-#ifndef _MSC_VER
+#if !defined(_MSC_VER) && !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   // See defect report "Trivial copy/move constructor for class with volatile
   // member" at
   // http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#2094
@@ -244,8 +270,7 @@ TEST(optionalTest, CopyConstructor) {
   // Also a cv-qualified scalar type should be trivially copyable.
   EXPECT_TRUE(absl::is_trivially_copy_constructible<
               absl::optional<volatile int>>::value);
-#endif  // _MSC_VER
-#endif  // ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG
+#endif  // !defined(_MSC_VER) && !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
 
   // constexpr copy constructor for trivially copyable types
   {
@@ -275,17 +300,10 @@ TEST(optionalTest, CopyConstructor) {
     EXPECT_TRUE(absl::is_trivially_copy_constructible<
                 absl::optional<const TrivialCopyable>>::value);
 #endif
-    // When testing with VS 2017 15.3, there seems to be a bug in MSVC
-    // std::optional when T is volatile-qualified. So skipping this test.
-    // Bug report:
-    // https://connect.microsoft.com/VisualStudio/feedback/details/3142534
-#if defined(ABSL_USES_STD_OPTIONAL) && defined(_MSC_VER) && _MSC_VER >= 1911
-#define ABSL_MSVC_OPTIONAL_VOLATILE_COPY_BUG 1
-#endif
-#ifndef ABSL_MSVC_OPTIONAL_VOLATILE_COPY_BUG
+#if !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
     EXPECT_FALSE(std::is_copy_constructible<
                  absl::optional<volatile TrivialCopyable>>::value);
-#endif
+#endif  // !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   }
 }
 
@@ -305,11 +323,9 @@ TEST(optionalTest, MoveConstructor) {
   EXPECT_FALSE(std::is_move_constructible<absl::optional<NonMovable>>::value);
   // test noexcept
   EXPECT_TRUE(std::is_nothrow_move_constructible<absl::optional<int>>::value);
-#ifndef ABSL_USES_STD_OPTIONAL
   EXPECT_EQ(
       absl::default_allocator_is_nothrow::value,
       std::is_nothrow_move_constructible<absl::optional<MoveableThrow>>::value);
-#endif
   EXPECT_TRUE(std::is_nothrow_move_constructible<
               absl::optional<MoveableNoThrow>>::value);
 }
@@ -638,8 +654,7 @@ TEST(optionalTest, CopyAssignment) {
   EXPECT_TRUE(absl::is_copy_assignable<NonTrivial>::value);
   EXPECT_FALSE(absl::is_trivially_copy_assignable<NonTrivial>::value);
 
-  // std::optional doesn't support volatile nontrivial types.
-#ifndef ABSL_USES_STD_OPTIONAL
+#if !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   {
     StructorListener listener;
     Listenable::listener = &listener;
@@ -658,7 +673,7 @@ TEST(optionalTest, CopyAssignment) {
     EXPECT_EQ(1, listener.destruct);
     EXPECT_EQ(1, listener.volatile_copy_assign);
   }
-#endif  // ABSL_USES_STD_OPTIONAL
+#endif  // !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
 }
 
 TEST(optionalTest, MoveAssignment) {
@@ -681,8 +696,7 @@ TEST(optionalTest, MoveAssignment) {
     EXPECT_EQ(1, listener.destruct);
     EXPECT_EQ(1, listener.move_assign);
   }
-  // std::optional doesn't support volatile nontrivial types.
-#ifndef ABSL_USES_STD_OPTIONAL
+#if !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   {
     StructorListener listener;
     Listenable::listener = &listener;
@@ -702,7 +716,7 @@ TEST(optionalTest, MoveAssignment) {
     EXPECT_EQ(1, listener.destruct);
     EXPECT_EQ(1, listener.volatile_move_assign);
   }
-#endif  // ABSL_USES_STD_OPTIONAL
+#endif  // !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   EXPECT_FALSE(absl::is_move_assignable<absl::optional<const int>>::value);
   EXPECT_TRUE(absl::is_move_assignable<absl::optional<Copyable>>::value);
   EXPECT_TRUE(absl::is_move_assignable<absl::optional<MoveableThrow>>::value);
@@ -974,8 +988,8 @@ TEST(optionalTest, PointerStuff) {
   EXPECT_EQ("foo", *opt);
   const auto& opt_const = opt;
   EXPECT_EQ("foo", *opt_const);
-  EXPECT_EQ(opt->size(), 3);
-  EXPECT_EQ(opt_const->size(), 3);
+  EXPECT_EQ(opt->size(), 3u);
+  EXPECT_EQ(opt_const->size(), 3u);
 
   constexpr absl::optional<ConstexprType> opt1(1);
   static_assert((*opt1).x == ConstexprType::kCtorInt, "");
@@ -1038,6 +1052,7 @@ TEST(optionalTest, Value) {
 #endif
   EXPECT_EQ("c&&", TypeQuals(OC(absl::in_place, "xvalue_c").value()));
 
+#if !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   // test on volatile type
   using OV = absl::optional<volatile int>;
   OV lvalue_v(absl::in_place, 42);
@@ -1045,6 +1060,7 @@ TEST(optionalTest, Value) {
   EXPECT_EQ(42, OV(42).value());
   EXPECT_TRUE((std::is_same<volatile int&, decltype(lvalue_v.value())>::value));
   EXPECT_TRUE((std::is_same<volatile int&&, decltype(OV(42).value())>::value));
+#endif  // !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
 
   // test exception throw on value()
   absl::optional<int> empty;
@@ -1087,6 +1103,7 @@ TEST(optionalTest, DerefOperator) {
 #endif
   EXPECT_EQ("c&&", TypeQuals(*OC(absl::in_place, "xvalue_c")));
 
+#if !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
   // test on volatile type
   using OV = absl::optional<volatile int>;
   OV lvalue_v(absl::in_place, 42);
@@ -1094,6 +1111,7 @@ TEST(optionalTest, DerefOperator) {
   EXPECT_EQ(42, *OV(42));
   EXPECT_TRUE((std::is_same<volatile int&, decltype(*lvalue_v)>::value));
   EXPECT_TRUE((std::is_same<volatile int&&, decltype(*OV(42))>::value));
+#endif  // !defined(ABSL_VOLATILE_RETURN_TYPES_DEPRECATED)
 
   constexpr absl::optional<int> opt1(1);
   static_assert(*opt1 == 1, "");
@@ -1505,7 +1523,7 @@ TEST(optionalTest, Hash) {
   for (int i = 0; i < 100; ++i) {
     hashcodes.insert(hash(i));
   }
-  EXPECT_GT(hashcodes.size(), 90);
+  EXPECT_GT(hashcodes.size(), 90u);
 
   static_assert(is_hash_enabled_for<absl::optional<int>>::value, "");
   static_assert(is_hash_enabled_for<absl::optional<Hashable>>::value, "");
@@ -1558,12 +1576,10 @@ TEST(optionalTest, NoExcept) {
   static_assert(
       std::is_nothrow_move_constructible<absl::optional<MoveMeNoThrow>>::value,
       "");
-#ifndef ABSL_USES_STD_OPTIONAL
   static_assert(absl::default_allocator_is_nothrow::value ==
                     std::is_nothrow_move_constructible<
                         absl::optional<MoveMeThrow>>::value,
                 "");
-#endif
   std::vector<absl::optional<MoveMeNoThrow>> v;
   for (int i = 0; i < 10; ++i) v.emplace_back();
 }
diff --git a/third_party/abseil-cpp/absl/types/span.h b/third_party/abseil-cpp/absl/types/span.h
index 6272bb7ad1..cd863a9593 100644
--- a/third_party/abseil-cpp/absl/types/span.h
+++ b/third_party/abseil-cpp/absl/types/span.h
@@ -60,6 +60,7 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/base/attributes.h"
 #include "absl/base/internal/throw_delegate.h"
 #include "absl/base/macros.h"
 #include "absl/base/optimization.h"
@@ -160,12 +161,12 @@ class Span {
 
   // Used to SFINAE-enable a function when the slice elements are const.
   template <typename U>
-  using EnableIfConstView =
+  using EnableIfValueIsConst =
       typename std::enable_if<std::is_const<T>::value, U>::type;
 
   // Used to SFINAE-enable a function when the slice elements are mutable.
   template <typename U>
-  using EnableIfMutableView =
+  using EnableIfValueIsMutable =
       typename std::enable_if<!std::is_const<T>::value, U>::type;
 
  public:
@@ -196,13 +197,34 @@ class Span {
   // Explicit reference constructor for a mutable `Span<T>` type. Can be
   // replaced with MakeSpan() to infer the type parameter.
   template <typename V, typename = EnableIfConvertibleFrom<V>,
-            typename = EnableIfMutableView<V>>
-  explicit Span(V& v) noexcept  // NOLINT(runtime/references)
+            typename = EnableIfValueIsMutable<V>,
+            typename = span_internal::EnableIfNotIsView<V>>
+  explicit Span(
+      V& v
+          ABSL_ATTRIBUTE_LIFETIME_BOUND) noexcept  // NOLINT(runtime/references)
       : Span(span_internal::GetData(v), v.size()) {}
 
   // Implicit reference constructor for a read-only `Span<const T>` type
   template <typename V, typename = EnableIfConvertibleFrom<V>,
-            typename = EnableIfConstView<V>>
+            typename = EnableIfValueIsConst<V>,
+            typename = span_internal::EnableIfNotIsView<V>>
+  constexpr Span(
+      const V& v
+          ABSL_ATTRIBUTE_LIFETIME_BOUND) noexcept  // NOLINT(runtime/explicit)
+      : Span(span_internal::GetData(v), v.size()) {}
+
+  // Overloads of the above two functions that are only enabled for view types.
+  // This is so we can drop the ABSL_ATTRIBUTE_LIFETIME_BOUND annotation. These
+  // overloads must be made unique by using a different template parameter list
+  // (hence the = 0 for the IsView enabler).
+  template <typename V, typename = EnableIfConvertibleFrom<V>,
+            typename = EnableIfValueIsMutable<V>,
+            span_internal::EnableIfIsView<V> = 0>
+  explicit Span(V& v) noexcept  // NOLINT(runtime/references)
+      : Span(span_internal::GetData(v), v.size()) {}
+  template <typename V, typename = EnableIfConvertibleFrom<V>,
+            typename = EnableIfValueIsConst<V>,
+            span_internal::EnableIfIsView<V> = 0>
   constexpr Span(const V& v) noexcept  // NOLINT(runtime/explicit)
       : Span(span_internal::GetData(v), v.size()) {}
 
@@ -242,7 +264,7 @@ class Span {
   //   Process(ints);
   //
   template <typename LazyT = T,
-            typename = EnableIfConstView<LazyT>>
+            typename = EnableIfValueIsConst<LazyT>>
   Span(std::initializer_list<value_type> v
            ABSL_ATTRIBUTE_LIFETIME_BOUND) noexcept  // NOLINT(runtime/explicit)
       : Span(v.begin(), v.size()) {}
@@ -664,7 +686,8 @@ constexpr Span<T> MakeSpan(T* ptr, size_t size) noexcept {
 
 template <int&... ExplicitArgumentBarrier, typename T>
 Span<T> MakeSpan(T* begin, T* end) noexcept {
-  return ABSL_HARDENING_ASSERT(begin <= end), Span<T>(begin, end - begin);
+  return ABSL_HARDENING_ASSERT(begin <= end),
+         Span<T>(begin, static_cast<size_t>(end - begin));
 }
 
 template <int&... ExplicitArgumentBarrier, typename C>
diff --git a/third_party/abseil-cpp/absl/types/variant_test.cc b/third_party/abseil-cpp/absl/types/variant_test.cc
index cf237334da..4cd5b7a358 100644
--- a/third_party/abseil-cpp/absl/types/variant_test.cc
+++ b/third_party/abseil-cpp/absl/types/variant_test.cc
@@ -281,7 +281,7 @@ TEST(VariantTest, TestDefaultConstructor) {
     using X = variant<int>;
     constexpr variant<int> x{};
     ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
+    ASSERT_EQ(0u, x.index());
     EXPECT_EQ(0, absl::get<0>(x));
     EXPECT_TRUE(std::is_nothrow_default_constructible<X>::value);
   }
@@ -290,7 +290,7 @@ TEST(VariantTest, TestDefaultConstructor) {
     using X = variant<NonNoexceptDefaultConstructible>;
     X x{};
     ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
+    ASSERT_EQ(0u, x.index());
     EXPECT_EQ(5, absl::get<0>(x).value);
     EXPECT_FALSE(std::is_nothrow_default_constructible<X>::value);
   }
@@ -299,7 +299,7 @@ TEST(VariantTest, TestDefaultConstructor) {
     using X = variant<int, NonNoexceptDefaultConstructible>;
     X x{};
     ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
+    ASSERT_EQ(0u, x.index());
     EXPECT_EQ(0, absl::get<0>(x));
     EXPECT_TRUE(std::is_nothrow_default_constructible<X>::value);
   }
@@ -308,7 +308,7 @@ TEST(VariantTest, TestDefaultConstructor) {
     using X = variant<NonNoexceptDefaultConstructible, int>;
     X x{};
     ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
+    ASSERT_EQ(0u, x.index());
     EXPECT_EQ(5, absl::get<0>(x).value);
     EXPECT_FALSE(std::is_nothrow_default_constructible<X>::value);
   }
@@ -480,7 +480,7 @@ TEST(VariantTest, InPlaceType) {
   ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
   EXPECT_EQ("ABC", absl::get<std::string>(v2));
 
-  Var v3(in_place_type_t<std::string>(), "ABC", 2);
+  Var v3(in_place_type_t<std::string>(), "ABC", 2u);
   ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
   EXPECT_EQ("AB", absl::get<std::string>(v3));
 
@@ -503,7 +503,7 @@ TEST(VariantTest, InPlaceTypeVariableTemplate) {
   ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
   EXPECT_EQ("ABC", absl::get<std::string>(v2));
 
-  Var v3(in_place_type<std::string>, "ABC", 2);
+  Var v3(in_place_type<std::string>, "ABC", 2u);
   ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
   EXPECT_EQ("AB", absl::get<std::string>(v3));
 
@@ -544,7 +544,7 @@ TEST(VariantTest, InPlaceIndex) {
   ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
   EXPECT_EQ("ABC", absl::get<std::string>(v2));
 
-  Var v3(in_place_index_t<1>(), "ABC", 2);
+  Var v3(in_place_index_t<1>(), "ABC", 2u);
   ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
   EXPECT_EQ("AB", absl::get<std::string>(v3));
 
@@ -571,7 +571,7 @@ TEST(VariantTest, InPlaceIndexVariableTemplate) {
   ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
   EXPECT_EQ("ABC", absl::get<std::string>(v2));
 
-  Var v3(in_place_index<1>, "ABC", 2);
+  Var v3(in_place_index<1>, "ABC", 2u);
   ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
   EXPECT_EQ("AB", absl::get<std::string>(v3));
 
@@ -688,11 +688,11 @@ TEST(VariantTest, TestSelfAssignment) {
   EXPECT_EQ(long_str, foo);
 
   variant<int, std::string> so = long_str;
-  ASSERT_EQ(1, so.index());
+  ASSERT_EQ(1u, so.index());
   EXPECT_EQ(long_str, absl::get<1>(so));
   so = *&so;
 
-  ASSERT_EQ(1, so.index());
+  ASSERT_EQ(1u, so.index());
   EXPECT_EQ(long_str, absl::get<1>(so));
 }
 
@@ -968,16 +968,16 @@ TEST(VariantTest, Index) {
   using Var = variant<int, std::string, double>;
 
   Var v = 1;
-  EXPECT_EQ(0, v.index());
+  EXPECT_EQ(0u, v.index());
   v = "str";
-  EXPECT_EQ(1, v.index());
+  EXPECT_EQ(1u, v.index());
   v = 0.;
-  EXPECT_EQ(2, v.index());
+  EXPECT_EQ(2u, v.index());
 
   Var v2 = v;
-  EXPECT_EQ(2, v2.index());
+  EXPECT_EQ(2u, v2.index());
   v2.emplace<int>(3);
-  EXPECT_EQ(0, v2.index());
+  EXPECT_EQ(0u, v2.index());
 }
 
 TEST(VariantTest, NotValuelessByException) {
@@ -1002,11 +1002,11 @@ TEST(VariantTest, IndexValuelessByException) {
   using Var = variant<MoveCanThrow, std::string, double>;
 
   Var v(absl::in_place_index<0>);
-  EXPECT_EQ(0, v.index());
+  EXPECT_EQ(0u, v.index());
   ToValuelessByException(v);
   EXPECT_EQ(absl::variant_npos, v.index());
   v = "str";
-  EXPECT_EQ(1, v.index());
+  EXPECT_EQ(1u, v.index());
 }
 
 TEST(VariantTest, ValuelessByException) {
@@ -1084,18 +1084,18 @@ TEST(VariantTest, MemberSwap) {
 TEST(VariantTest, VariantSize) {
   {
     using Size1Variant = absl::variant<int>;
-    EXPECT_EQ(1, absl::variant_size<Size1Variant>::value);
-    EXPECT_EQ(1, absl::variant_size<const Size1Variant>::value);
-    EXPECT_EQ(1, absl::variant_size<volatile Size1Variant>::value);
-    EXPECT_EQ(1, absl::variant_size<const volatile Size1Variant>::value);
+    EXPECT_EQ(1u, absl::variant_size<Size1Variant>::value);
+    EXPECT_EQ(1u, absl::variant_size<const Size1Variant>::value);
+    EXPECT_EQ(1u, absl::variant_size<volatile Size1Variant>::value);
+    EXPECT_EQ(1u, absl::variant_size<const volatile Size1Variant>::value);
   }
 
   {
     using Size3Variant = absl::variant<int, float, int>;
-    EXPECT_EQ(3, absl::variant_size<Size3Variant>::value);
-    EXPECT_EQ(3, absl::variant_size<const Size3Variant>::value);
-    EXPECT_EQ(3, absl::variant_size<volatile Size3Variant>::value);
-    EXPECT_EQ(3, absl::variant_size<const volatile Size3Variant>::value);
+    EXPECT_EQ(3u, absl::variant_size<Size3Variant>::value);
+    EXPECT_EQ(3u, absl::variant_size<const Size3Variant>::value);
+    EXPECT_EQ(3u, absl::variant_size<volatile Size3Variant>::value);
+    EXPECT_EQ(3u, absl::variant_size<const volatile Size3Variant>::value);
   }
 }
 
@@ -1799,14 +1799,14 @@ TEST(VariantTest, VisitSimple) {
   EXPECT_EQ("B", piece);
 
   struct StrLen {
-    int operator()(const char* s) const { return strlen(s); }
-    int operator()(const std::string& s) const { return s.size(); }
+    size_t operator()(const char* s) const { return strlen(s); }
+    size_t operator()(const std::string& s) const { return s.size(); }
   };
 
   v = "SomeStr";
-  EXPECT_EQ(7, absl::visit(StrLen{}, v));
+  EXPECT_EQ(7u, absl::visit(StrLen{}, v));
   v = std::string("VeryLargeThisTime");
-  EXPECT_EQ(17, absl::visit(StrLen{}, v));
+  EXPECT_EQ(17u, absl::visit(StrLen{}, v));
 }
 
 TEST(VariantTest, VisitRValue) {
@@ -1979,7 +1979,7 @@ TEST(VariantTest, MonostateBasic) {
 
 TEST(VariantTest, VariantMonostateDefaultConstruction) {
   absl::variant<absl::monostate, NonDefaultConstructible> var;
-  EXPECT_EQ(var.index(), 0);
+  EXPECT_EQ(var.index(), 0u);
 }
 
 ////////////////////////////////
@@ -2100,7 +2100,7 @@ TEST(VariantTest, Hash) {
     for (int i = 0; i < 100; ++i) {
       hashcodes.insert(hash(i));
     }
-    EXPECT_GT(hashcodes.size(), 90);
+    EXPECT_GT(hashcodes.size(), 90u);
 
     // test const-qualified
     static_assert(type_traits_internal::IsHashable<variant<const int>>::value,
@@ -2312,9 +2312,9 @@ TEST(VariantTest, TestRvalueConversion) {
   EXPECT_EQ(42, absl::get<int32_t>(variant2));
 
   variant2 =
-      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<uint32_t>(42));
+      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<uint32_t>(42u));
   ASSERT_TRUE(absl::holds_alternative<uint32_t>(variant2));
-  EXPECT_EQ(42, absl::get<uint32_t>(variant2));
+  EXPECT_EQ(42u, absl::get<uint32_t>(variant2));
 #endif  // !ABSL_USES_STD_VARIANT
 
   variant<Convertible1, Convertible2> variant3(
@@ -2361,10 +2361,10 @@ TEST(VariantTest, TestLvalueConversion) {
   ASSERT_TRUE(absl::holds_alternative<int32_t>(variant2));
   EXPECT_EQ(42, absl::get<int32_t>(variant2));
 
-  variant<uint32_t> source6(42);
+  variant<uint32_t> source6(42u);
   variant2 = ConvertVariantTo<variant<int32_t, uint32_t>>(source6);
   ASSERT_TRUE(absl::holds_alternative<uint32_t>(variant2));
-  EXPECT_EQ(42, absl::get<uint32_t>(variant2));
+  EXPECT_EQ(42u, absl::get<uint32_t>(variant2));
 #endif
 
   variant<Convertible2, Convertible1> source7((Convertible1()));
@@ -2455,8 +2455,8 @@ TEST(VariantTest, TestRvalueConversionViaConvertVariantTo) {
   EXPECT_THAT(absl::get_if<int32_t>(&variant2), Pointee(42));
 
   variant2 =
-      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<uint32_t>(42));
-  EXPECT_THAT(absl::get_if<uint32_t>(&variant2), Pointee(42));
+      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<uint32_t>(42u));
+  EXPECT_THAT(absl::get_if<uint32_t>(&variant2), Pointee(42u));
 #endif
 
   variant<Convertible1, Convertible2> variant3(
@@ -2499,9 +2499,9 @@ TEST(VariantTest, TestLvalueConversionViaConvertVariantTo) {
       ConvertVariantTo<variant<int32_t, uint32_t>>(source5));
   EXPECT_THAT(absl::get_if<int32_t>(&variant2), Pointee(42));
 
-  variant<uint32_t> source6(42);
+  variant<uint32_t> source6(42u);
   variant2 = ConvertVariantTo<variant<int32_t, uint32_t>>(source6);
-  EXPECT_THAT(absl::get_if<uint32_t>(&variant2), Pointee(42));
+  EXPECT_THAT(absl::get_if<uint32_t>(&variant2), Pointee(42u));
 #endif  // !ABSL_USES_STD_VARIANT
 
   variant<Convertible2, Convertible1> source7((Convertible1()));
@@ -2570,7 +2570,7 @@ TEST(VariantTest, TestVectorOfMoveonlyVariant) {
   vec.reserve(3);
   auto another_vec = absl::move(vec);
   // As a sanity check, verify vector contents.
-  ASSERT_EQ(2, another_vec.size());
+  ASSERT_EQ(2u, another_vec.size());
   EXPECT_EQ(42, *absl::get<std::unique_ptr<int>>(another_vec[0]));
   EXPECT_EQ("Hello", absl::get<std::string>(another_vec[1]));
 }
diff --git a/third_party/abseil-cpp/absl/utility/BUILD.gn b/third_party/abseil-cpp/absl/utility/BUILD.gn
new file mode 100644
index 0000000000..caa959c9cb
--- /dev/null
+++ b/third_party/abseil-cpp/absl/utility/BUILD.gn
@@ -0,0 +1,14 @@
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/abseil-cpp/absl.gni")
+
+absl_source_set("utility") {
+  public = [ "utility.h" ]
+  deps = [
+    "//third_party/abseil-cpp/absl/base:base_internal",
+    "//third_party/abseil-cpp/absl/base:config",
+    "//third_party/abseil-cpp/absl/meta:type_traits",
+  ]
+}
diff --git a/third_party/abseil-cpp/absl/utility/utility_test.cc b/third_party/abseil-cpp/absl/utility/utility_test.cc
index f044ad644a..2f0509aa4d 100644
--- a/third_party/abseil-cpp/absl/utility/utility_test.cc
+++ b/third_party/abseil-cpp/absl/utility/utility_test.cc
@@ -1,4 +1,4 @@
-// Copyright 2017 The Abseil Authors.
+// Copyright 2022 The Abseil Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -14,10 +14,12 @@
 
 #include "absl/utility/utility.h"
 
+#include <memory>
 #include <sstream>
 #include <string>
 #include <tuple>
 #include <type_traits>
+#include <utility>
 #include <vector>
 
 #include "gmock/gmock.h"
@@ -35,10 +37,10 @@ namespace {
 // Both the unused variables and the name length warnings are due to calls
 // to absl::make_index_sequence with very large values, creating very long type
 // names. The resulting warnings are so long they make build output unreadable.
-#pragma warning( push )
-#pragma warning( disable : 4503 )  // decorated name length exceeded
-#pragma warning( disable : 4101 )  // unreferenced local variable
-#endif  // _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4503)  // decorated name length exceeded
+#pragma warning(disable : 4101)  // unreferenced local variable
+#endif                           // _MSC_VER
 
 using ::testing::ElementsAre;
 using ::testing::Pointee;
@@ -227,8 +229,7 @@ TEST(ApplyTest, NonCopyableArgument) {
 }
 
 TEST(ApplyTest, NonCopyableResult) {
-  EXPECT_THAT(absl::apply(Factory, std::make_tuple(42)),
-              ::testing::Pointee(42));
+  EXPECT_THAT(absl::apply(Factory, std::make_tuple(42)), Pointee(42));
 }
 
 TEST(ApplyTest, VoidResult) { absl::apply(NoOp, std::tuple<>()); }
@@ -373,4 +374,3 @@ TEST(MakeFromTupleTest, Pair) {
 }
 
 }  // namespace
-
diff --git a/third_party/abseil-cpp/absl_hardening_test.cc b/third_party/abseil-cpp/absl_hardening_test.cc
new file mode 100644
index 0000000000..561f334bb9
--- /dev/null
+++ b/third_party/abseil-cpp/absl_hardening_test.cc
@@ -0,0 +1,80 @@
+// Copyright 2020 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <limits>
+#include <vector>
+
+#include "gtest/gtest.h"
+#include "third_party/abseil-cpp/absl/base/options.h"
+#include "third_party/abseil-cpp/absl/container/fixed_array.h"
+#include "third_party/abseil-cpp/absl/container/inlined_vector.h"
+#include "third_party/abseil-cpp/absl/strings/string_view.h"
+#include "third_party/abseil-cpp/absl/types/optional.h"
+#include "third_party/abseil-cpp/absl/types/span.h"
+#include "third_party/abseil-cpp/absl/types/variant.h"
+
+namespace {
+
+#if !ABSL_OPTION_HARDENED
+# error "Define ABSL_OPTION_HARDENED to 1 in absl/base/options.h"
+#endif
+
+TEST(AbslHardeningTest, Optional) {
+  absl::optional<int> optional;
+  EXPECT_DEATH_IF_SUPPORTED(*optional, "");
+}
+
+TEST(AbslHardeningTest, StringView) {
+  absl::string_view view("foo");
+  EXPECT_DEATH_IF_SUPPORTED(view[4], "");
+  EXPECT_DEATH_IF_SUPPORTED(view.remove_prefix(10), "");
+  EXPECT_DEATH_IF_SUPPORTED(view.remove_suffix(10), "");
+
+  absl::string_view empty("");
+  EXPECT_DEATH_IF_SUPPORTED(empty.front(), "");
+  EXPECT_DEATH_IF_SUPPORTED(empty.back(), "");
+}
+
+TEST(AbslHardeningTest, FixedArray) {
+  absl::FixedArray<int, 4> fixed_array(0);
+  EXPECT_DEATH_IF_SUPPORTED(fixed_array[1], "");
+  EXPECT_DEATH_IF_SUPPORTED(fixed_array.front(), "");
+  EXPECT_DEATH_IF_SUPPORTED(fixed_array.back(), "");
+}
+
+TEST(AbslHardeningTest, InlinedVector) {
+  absl::InlinedVector<int, 10> inlined_vector;
+  EXPECT_DEATH_IF_SUPPORTED(inlined_vector[1], "");
+  EXPECT_DEATH_IF_SUPPORTED(inlined_vector.front(), "");
+  EXPECT_DEATH_IF_SUPPORTED(inlined_vector.back(), "");
+  EXPECT_DEATH_IF_SUPPORTED(
+      inlined_vector.resize(inlined_vector.max_size() + 1), "");
+  EXPECT_DEATH_IF_SUPPORTED(inlined_vector.pop_back(), "");
+
+  auto it = inlined_vector.end();
+  EXPECT_DEATH_IF_SUPPORTED(inlined_vector.erase(it), "");
+}
+
+TEST(AbslHardeningTest, Span) {
+  std::vector<int> v;
+  auto span = absl::Span<const int>(v);
+
+  EXPECT_DEATH_IF_SUPPORTED(span.front(), "");
+  EXPECT_DEATH_IF_SUPPORTED(span.back(), "");
+  EXPECT_DEATH_IF_SUPPORTED(span.remove_prefix(10), "");
+  EXPECT_DEATH_IF_SUPPORTED(span.remove_suffix(10), "");
+  EXPECT_DEATH_IF_SUPPORTED(span[10], "");
+
+  std::vector<int> v1 = {1, 2, 3, 4};
+  EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(&v1[2], &v1[0]), "");
+  EXPECT_DEATH_IF_SUPPORTED(absl::MakeConstSpan(&v1[2], &v1[0]), "");
+}
+
+TEST(AbslHardeningTest, Variant) {
+  absl::variant<int, std::string> variant = 5;
+  EXPECT_DEATH_IF_SUPPORTED(absl::get<std::string>(variant), "");
+  EXPECT_DEATH_IF_SUPPORTED(absl::get<1>(variant), "");
+}
+
+}  // namespace
diff --git a/third_party/abseil-cpp/ci/absl_alternate_options.h b/third_party/abseil-cpp/ci/absl_alternate_options.h
index 29b020d9fa..82d2ecf864 100644
--- a/third_party/abseil-cpp/ci/absl_alternate_options.h
+++ b/third_party/abseil-cpp/ci/absl_alternate_options.h
@@ -15,8 +15,8 @@
 // Alternate options.h file, used in continuous integration testing to exercise
 // option settings not used by default.
 
-#ifndef ABSL_BASE_OPTIONS_H_
-#define ABSL_BASE_OPTIONS_H_
+#ifndef ABSL_CI_ABSL_ALTERNATE_OPTIONS_H_
+#define ABSL_CI_ABSL_ALTERNATE_OPTIONS_H_
 
 #define ABSL_OPTION_USE_STD_ANY 0
 #define ABSL_OPTION_USE_STD_OPTIONAL 0
@@ -26,4 +26,4 @@
 #define ABSL_OPTION_INLINE_NAMESPACE_NAME ns
 #define ABSL_OPTION_HARDENED 1
 
-#endif  // ABSL_BASE_OPTIONS_H_
+#endif  // ABSL_CI_ABSL_ALTERNATE_OPTIONS_H_
diff --git a/third_party/abseil-cpp/ci/cmake_common.sh b/third_party/abseil-cpp/ci/cmake_common.sh
index 51f310693e..372038a520 100644
--- a/third_party/abseil-cpp/ci/cmake_common.sh
+++ b/third_party/abseil-cpp/ci/cmake_common.sh
@@ -14,7 +14,7 @@
 
 # The commit of GoogleTest to be used in the CMake tests in this directory.
 # Keep this in sync with the commit in the WORKSPACE file.
-readonly ABSL_GOOGLETEST_COMMIT="8d51ffdfab10b3fba636ae69bc03da4b54f8c235"
+readonly ABSL_GOOGLETEST_COMMIT="86add13493e5c881d7e4ba77fb91c1f57752b3a4"
 
 # Avoid depending on GitHub by looking for a cached copy of the commit first.
 if [[ -r "${KOKORO_GFILE_DIR:-}/distdir/${ABSL_GOOGLETEST_COMMIT}.zip" ]]; then
diff --git a/third_party/abseil-cpp/ci/cmake_install_test.sh b/third_party/abseil-cpp/ci/cmake_install_test.sh
index 97ed8478e0..ab3b86f042 100755
--- a/third_party/abseil-cpp/ci/cmake_install_test.sh
+++ b/third_party/abseil-cpp/ci/cmake_install_test.sh
@@ -29,6 +29,18 @@ source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
 readonly DOCKER_CONTAINER=${LINUX_GCC_LATEST_CONTAINER}
 
+# Verify that everything works with the standard "cmake && make && make install"
+# without building tests or requiring GoogleTest.
+time docker run \
+    --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp-ro,readonly \
+    --tmpfs=/buildfs:exec \
+    --workdir=/buildfs \
+    --rm \
+    ${DOCKER_EXTRA_ARGS:-} \
+    ${DOCKER_CONTAINER} \
+    /bin/bash -c "cmake /abseil-cpp-ro && make -j$(nproc) && make install"
+
+# Verify that a more complicated project works.
 for link_type in ${LINK_TYPE}; do
   time docker run \
     --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp-ro,readonly \
diff --git a/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_asan_bazel.sh b/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_asan_bazel.sh
index 5245933a5f..f9c146b05b 100755
--- a/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_asan_bazel.sh
+++ b/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_asan_bazel.sh
@@ -25,7 +25,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
+  STD="c++14 c++17 c++20"
 fi
 
 if [[ -z ${COMPILATION_MODE:-} ]]; then
@@ -70,13 +70,14 @@ for std in ${STD}; do
         --rm \
         -e CC="/opt/llvm/clang/bin/clang" \
         -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
-        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib" \
-        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/c++/v1" \
+        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib/x86_64-unknown-linux-gnu:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib/x86_64-unknown-linux-gnu" \
+        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/x86_64-unknown-linux-gnu/c++/v1:/opt/llvm/libcxx/include/c++/v1" \
         ${DOCKER_EXTRA_ARGS:-} \
         ${DOCKER_CONTAINER} \
         /usr/local/bin/bazel test ... \
           --compilation_mode="${compilation_mode}" \
           --copt="${exceptions_mode}" \
+          --copt="-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1" \
           --copt="-fsanitize=address" \
           --copt="-fsanitize=float-divide-by-zero" \
           --copt="-fsanitize=nullability" \
@@ -84,6 +85,7 @@ for std in ${STD}; do
           --copt="-fno-sanitize-blacklist" \
           --copt=-Werror \
           --distdir="/bazel-distdir" \
+          --features=external_include_paths \
           --keep_going \
           --linkopt="-fsanitize=address" \
           --linkopt="-fsanitize-link-c++-runtime" \
diff --git a/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_bazel.sh b/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_bazel.sh
index e0fe653de7..38b2d74401 100755
--- a/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_bazel.sh
+++ b/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_bazel.sh
@@ -25,7 +25,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
+  STD="c++14 c++17 c++20"
 fi
 
 if [[ -z ${COMPILATION_MODE:-} ]]; then
@@ -71,8 +71,8 @@ for std in ${STD}; do
         --rm \
         -e CC="/opt/llvm/clang/bin/clang" \
         -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
-        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib" \
-        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/c++/v1" \
+        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib/x86_64-unknown-linux-gnu:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib/x86_64-unknown-linux-gnu" \
+        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/x86_64-unknown-linux-gnu/c++/v1:/opt/llvm/libcxx/include/c++/v1" \
         ${DOCKER_EXTRA_ARGS:-} \
         ${DOCKER_CONTAINER} \
         /bin/sh -c "
@@ -83,9 +83,11 @@ for std in ${STD}; do
           /usr/local/bin/bazel test ... \
             --compilation_mode=\"${compilation_mode}\" \
             --copt=\"${exceptions_mode}\" \
+            --copt=\"-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1\" \
             --copt=-Werror \
             --define=\"absl=1\" \
             --distdir=\"/bazel-distdir\" \
+            --features=external_include_paths \
             --keep_going \
             --show_timestamps \
             --test_env=\"GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1\" \
diff --git a/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_tsan_bazel.sh b/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_tsan_bazel.sh
index 555f6b1c2a..5652ebe14d 100755
--- a/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_tsan_bazel.sh
+++ b/third_party/abseil-cpp/ci/linux_clang-latest_libcxx_tsan_bazel.sh
@@ -25,7 +25,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
+  STD="c++14 c++17 c++20"
 fi
 
 if [[ -z ${COMPILATION_MODE:-} ]]; then
@@ -70,18 +70,20 @@ for std in ${STD}; do
         --rm \
         -e CC="/opt/llvm/clang/bin/clang" \
         -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
-        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx-tsan/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx-tsan/lib" \
-        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx-tsan/include/c++/v1" \
+        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx-tsan/lib/x86_64-unknown-linux-gnu:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx-tsan/lib/x86_64-unknown-linux-gnu" \
+        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx-tsan/include/x86_64-unknown-linux-gnu/c++/v1:/opt/llvm/libcxx-tsan/include/c++/v1" \
         ${DOCKER_EXTRA_ARGS:-} \
         ${DOCKER_CONTAINER} \
         /usr/local/bin/bazel test ... \
           --build_tag_filters="-notsan" \
           --compilation_mode="${compilation_mode}" \
           --copt="${exceptions_mode}" \
+          --copt="-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1" \
           --copt="-fsanitize=thread" \
           --copt="-fno-sanitize-blacklist" \
           --copt=-Werror \
           --distdir="/bazel-distdir" \
+          --features=external_include_paths \
           --keep_going \
           --linkopt="-fsanitize=thread" \
           --show_timestamps \
diff --git a/third_party/abseil-cpp/ci/linux_clang-latest_libstdcxx_bazel.sh b/third_party/abseil-cpp/ci/linux_clang-latest_libstdcxx_bazel.sh
index 36fdf82c1d..720e776deb 100755
--- a/third_party/abseil-cpp/ci/linux_clang-latest_libstdcxx_bazel.sh
+++ b/third_party/abseil-cpp/ci/linux_clang-latest_libstdcxx_bazel.sh
@@ -25,7 +25,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17"
+  STD="c++14 c++17"
 fi
 
 if [[ -z ${COMPILATION_MODE:-} ]]; then
@@ -75,10 +75,12 @@ for std in ${STD}; do
         /usr/local/bin/bazel test ... \
           --compilation_mode="${compilation_mode}" \
           --copt="--gcc-toolchain=/usr/local" \
+          --copt="-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1" \
           --copt="${exceptions_mode}" \
           --copt=-Werror \
           --define="absl=1" \
           --distdir="/bazel-distdir" \
+          --features=external_include_paths \
           --keep_going \
           --linkopt="--gcc-toolchain=/usr/local" \
           --show_timestamps \
diff --git a/third_party/abseil-cpp/ci/linux_docker_containers.sh b/third_party/abseil-cpp/ci/linux_docker_containers.sh
index 32865b8348..f55e153b85 100644
--- a/third_party/abseil-cpp/ci/linux_docker_containers.sh
+++ b/third_party/abseil-cpp/ci/linux_docker_containers.sh
@@ -16,6 +16,6 @@
 # Test scripts should source this file to get the identifiers.
 
 readonly LINUX_ALPINE_CONTAINER="gcr.io/google.com/absl-177019/alpine:20201026"
-readonly LINUX_CLANG_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20210617"
-readonly LINUX_GCC_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20210617"
-readonly LINUX_GCC_FLOOR_CONTAINER="gcr.io/google.com/absl-177019/linux_gcc-floor:20210617"
+readonly LINUX_CLANG_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20220217"
+readonly LINUX_GCC_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20220217"
+readonly LINUX_GCC_FLOOR_CONTAINER="gcr.io/google.com/absl-177019/linux_gcc-floor:20220621"
diff --git a/third_party/abseil-cpp/ci/linux_gcc-floor_libstdcxx_bazel.sh b/third_party/abseil-cpp/ci/linux_gcc-floor_libstdcxx_bazel.sh
index 54ab68a37e..68b3999485 100755
--- a/third_party/abseil-cpp/ci/linux_gcc-floor_libstdcxx_bazel.sh
+++ b/third_party/abseil-cpp/ci/linux_gcc-floor_libstdcxx_bazel.sh
@@ -25,7 +25,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14"
+  STD="c++14"
 fi
 
 if [[ -z ${COMPILATION_MODE:-} ]]; then
@@ -75,9 +75,11 @@ for std in ${STD}; do
         /usr/local/bin/bazel test ... \
           --compilation_mode="${compilation_mode}" \
           --copt="${exceptions_mode}" \
+          --copt="-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1" \
           --copt=-Werror \
           --define="absl=1" \
           --distdir="/bazel-distdir" \
+          --features=external_include_paths \
           --keep_going \
           --show_timestamps \
           --test_env="GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1" \
diff --git a/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_bazel.sh b/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_bazel.sh
index 0555ecedb5..091acb3362 100755
--- a/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_bazel.sh
+++ b/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_bazel.sh
@@ -25,7 +25,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
+  STD="c++14 c++17 c++20"
 fi
 
 if [[ -z ${COMPILATION_MODE:-} ]]; then
@@ -81,9 +81,11 @@ for std in ${STD}; do
           /usr/local/bin/bazel test ... \
             --compilation_mode=\"${compilation_mode}\" \
             --copt=\"${exceptions_mode}\" \
+            --copt=\"-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1\" \
             --copt=-Werror \
             --define=\"absl=1\" \
             --distdir=\"/bazel-distdir\" \
+            --features=external_include_paths \
             --keep_going \
             --show_timestamps \
             --test_env=\"GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1\" \
diff --git a/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_cmake.sh b/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_cmake.sh
index ab06aa0574..ba65853f7f 100755
--- a/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_cmake.sh
+++ b/third_party/abseil-cpp/ci/linux_gcc-latest_libstdcxx_cmake.sh
@@ -23,7 +23,7 @@ fi
 source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 
 if [[ -z ${ABSL_CMAKE_CXX_STANDARDS:-} ]]; then
-  ABSL_CMAKE_CXX_STANDARDS="11 14 17 20"
+  ABSL_CMAKE_CXX_STANDARDS="14 17 20"
 fi
 
 if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
@@ -54,7 +54,7 @@ for std in ${ABSL_CMAKE_CXX_STANDARDS}; do
           cmake /abseil-cpp \
             -DABSL_GOOGLETEST_DOWNLOAD_URL=${ABSL_GOOGLETEST_DOWNLOAD_URL} \
             -DBUILD_SHARED_LIBS=${build_shared} \
-            -DBUILD_TESTING=ON \
+            -DABSL_BUILD_TESTING=ON \
             -DCMAKE_BUILD_TYPE=${compilation_mode} \
             -DCMAKE_CXX_STANDARD=${std} \
             -DCMAKE_MODULE_LINKER_FLAGS=\"-Wl,--no-undefined\" && \
diff --git a/third_party/abseil-cpp/ci/linux_gcc_alpine_cmake.sh b/third_party/abseil-cpp/ci/linux_gcc_alpine_cmake.sh
index bce27d295f..10540130c6 100755
--- a/third_party/abseil-cpp/ci/linux_gcc_alpine_cmake.sh
+++ b/third_party/abseil-cpp/ci/linux_gcc_alpine_cmake.sh
@@ -23,7 +23,7 @@ fi
 source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 
 if [[ -z ${ABSL_CMAKE_CXX_STANDARDS:-} ]]; then
-  ABSL_CMAKE_CXX_STANDARDS="11 14 17"
+  ABSL_CMAKE_CXX_STANDARDS="14 17"
 fi
 
 if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
@@ -53,7 +53,7 @@ for std in ${ABSL_CMAKE_CXX_STANDARDS}; do
         /bin/sh -c "
           cmake /abseil-cpp \
             -DABSL_GOOGLETEST_DOWNLOAD_URL=${ABSL_GOOGLETEST_DOWNLOAD_URL} \
-            -DBUILD_TESTING=ON \
+            -DABSL_BUILD_TESTING=ON \
             -DCMAKE_BUILD_TYPE=${compilation_mode} \
             -DCMAKE_CXX_STANDARD=${std} \
             -DCMAKE_MODULE_LINKER_FLAGS=\"-Wl,--no-undefined\" && \
diff --git a/third_party/abseil-cpp/ci/macos_xcode_bazel.sh b/third_party/abseil-cpp/ci/macos_xcode_bazel.sh
index 9e14e66039..04c9a1a2be 100755
--- a/third_party/abseil-cpp/ci/macos_xcode_bazel.sh
+++ b/third_party/abseil-cpp/ci/macos_xcode_bazel.sh
@@ -24,7 +24,7 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 # If we are running on Kokoro, check for a versioned Bazel binary.
-KOKORO_GFILE_BAZEL_BIN="bazel-3.7.0-darwin-x86_64"
+KOKORO_GFILE_BAZEL_BIN="bazel-5.1.1-darwin-x86_64"
 if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f ${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN} ]]; then
   BAZEL_BIN="${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN}"
   chmod +x ${BAZEL_BIN}
@@ -32,6 +32,13 @@ else
   BAZEL_BIN="bazel"
 fi
 
+# Avoid depending on external sites like GitHub by checking --distdir for
+# external dependencies first.
+# https://docs.bazel.build/versions/master/guide.html#distdir
+if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
+  BAZEL_EXTRA_ARGS="--distdir=${KOKORO_GFILE_DIR}/distdir ${BAZEL_EXTRA_ARGS:-}"
+fi
+
 # Print the compiler and Bazel versions.
 echo "---------------"
 gcc -v
@@ -46,9 +53,13 @@ if [[ -n "${ALTERNATE_OPTIONS:-}" ]]; then
 fi
 
 ${BAZEL_BIN} test ... \
-  --copt=-Werror \
+  --copt="-DGTEST_REMOVE_LEGACY_TEST_CASEAPI_=1" \
+  --copt="-Werror" \
+  --cxxopt="-std=c++14" \
+  --features=external_include_paths \
   --keep_going \
   --show_timestamps \
   --test_env="TZDIR=${ABSEIL_ROOT}/absl/time/internal/cctz/testdata/zoneinfo" \
   --test_output=errors \
-  --test_tag_filters=-benchmark
+  --test_tag_filters=-benchmark \
+  ${BAZEL_EXTRA_ARGS:-}
diff --git a/third_party/abseil-cpp/ci/macos_xcode_cmake.sh b/third_party/abseil-cpp/ci/macos_xcode_cmake.sh
index 2a870cf4e9..97988631b0 100755
--- a/third_party/abseil-cpp/ci/macos_xcode_cmake.sh
+++ b/third_party/abseil-cpp/ci/macos_xcode_cmake.sh
@@ -45,9 +45,9 @@ for compilation_mode in ${ABSL_CMAKE_BUILD_TYPES}; do
     time cmake ${ABSEIL_ROOT} \
       -GXcode \
       -DBUILD_SHARED_LIBS=${build_shared} \
-      -DBUILD_TESTING=ON \
+      -DABSL_BUILD_TESTING=ON \
       -DCMAKE_BUILD_TYPE=${compilation_mode} \
-      -DCMAKE_CXX_STANDARD=11 \
+      -DCMAKE_CXX_STANDARD=14 \
       -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--no-undefined" \
       -DABSL_GOOGLETEST_DOWNLOAD_URL="${ABSL_GOOGLETEST_DOWNLOAD_URL}"
     time cmake --build .
diff --git a/third_party/abseil-cpp/conanfile.py b/third_party/abseil-cpp/conanfile.py
index 926ec5ccd6..4bbc62eedd 100755
--- a/third_party/abseil-cpp/conanfile.py
+++ b/third_party/abseil-cpp/conanfile.py
@@ -30,7 +30,7 @@ class AbseilConan(ConanFile):
             raise ConanInvalidConfiguration("Abseil does not support MSVC < 14")
 
     def build(self):
-        tools.replace_in_file("CMakeLists.txt", "project(absl CXX)", "project(absl CXX)\ninclude(conanbuildinfo.cmake)\nconan_basic_setup()")
+        tools.replace_in_file("CMakeLists.txt", "project(absl LANGUAGES CXX)", "project(absl LANGUAGES CXX)\ninclude(conanbuildinfo.cmake)\nconan_basic_setup()")
         cmake = CMake(self)
         cmake.definitions["BUILD_TESTING"] = False
         cmake.configure()
diff --git a/third_party/abseil-cpp/generate_def_files.py b/third_party/abseil-cpp/generate_def_files.py
new file mode 100755
index 0000000000..f288c9bfba
--- /dev/null
+++ b/third_party/abseil-cpp/generate_def_files.py
@@ -0,0 +1,177 @@
+#!/usr/bin/env python3
+
+"""Script to generate Chromium's Abseil .def files at roll time.
+
+This script generates //third_party/abseil-app/absl/symbols_*.def at Abseil
+roll time.
+
+Since Abseil doesn't export symbols, Chromium is forced to consider all
+Abseil's symbols as publicly visible. On POSIX it is possible to use
+-fvisibility=default but on Windows a .def file with all the symbols
+is needed.
+
+Unless you are on a Windows machine, you need to set up your Chromium
+checkout for cross-compilation by following the instructions at
+https://chromium.googlesource.com/chromium/src.git/+/main/docs/win_cross.md.
+If you are on Windows, you may need to tweak this script to run, e.g. by
+changing "gn" to "gn.bat", changing "llvm-nm" to the name of your copy of
+llvm-nm, etc.
+"""
+
+import fnmatch
+import logging
+import os
+import re
+import subprocess
+import sys
+import tempfile
+import time
+
+# Matches a mangled symbol that has 'absl' in it, this should be a good
+# enough heuristic to select Abseil symbols to list in the .def file.
+ABSL_SYM_RE = re.compile(r'0* [BT] (?P<symbol>(\?+)[^\?].*absl.*)')
+if sys.platform == 'win32':
+  # Typical dumpbin /symbol lines look like this:
+  # 04B 0000000C SECT14 notype       Static       | ?$S1@?1??SetCurrent
+  # ThreadIdentity@base_internal@absl@@YAXPAUThreadIdentity@12@P6AXPAX@Z@Z@4IA
+  #  (unsigned int `void __cdecl absl::base_internal::SetCurrentThreadIdentity...
+  # We need to start on "| ?" and end on the first " (" (stopping on space would
+  # also work).
+  # This regex is identical inside the () characters except for the ? after .*,
+  # which is needed to prevent greedily grabbing the undecorated version of the
+  # symbols.
+  ABSL_SYM_RE = '.*External     \| (?P<symbol>(\?+)[^\?].*?absl.*?) \(.*'
+  # Typical exported symbols in dumpbin /directives look like:
+  #    /EXPORT:?kHexChar@numbers_internal@absl@@3QBDB,DATA
+  ABSL_EXPORTED_RE = '.*/EXPORT:(.*),.*'
+
+
+def _DebugOrRelease(is_debug):
+  return 'dbg' if is_debug else 'rel'
+
+
+def _GenerateDefFile(cpu, is_debug, extra_gn_args=[], suffix=None):
+  """Generates a .def file for the absl component build on the specified CPU."""
+  if extra_gn_args:
+    assert suffix != None, 'suffix is needed when extra_gn_args is used'
+
+  flavor = _DebugOrRelease(is_debug)
+  gn_args = [
+      'ffmpeg_branding = "Chrome"',
+      'is_component_build = true',
+      'is_debug = {}'.format(str(is_debug).lower()),
+      'proprietary_codecs = true',
+      'symbol_level = 0',
+      'target_cpu = "{}"'.format(cpu),
+      'target_os = "win"',
+  ]
+  gn_args.extend(extra_gn_args)
+
+  gn = 'gn'
+  autoninja = 'autoninja'
+  symbol_dumper = ['third_party/llvm-build/Release+Asserts/bin/llvm-nm']
+  if sys.platform == 'win32':
+    gn = 'gn.bat'
+    autoninja = 'autoninja.bat'
+    symbol_dumper = ['dumpbin', '/symbols']
+    import shutil
+    if not shutil.which('dumpbin'):
+      logging.error('dumpbin not found. Run tools\win\setenv.bat.')
+      exit(1)
+  with tempfile.TemporaryDirectory() as out_dir:
+    logging.info('[%s - %s] Creating tmp out dir in %s', cpu, flavor, out_dir)
+    subprocess.check_call([gn, 'gen', out_dir, '--args=' + ' '.join(gn_args)],
+                          cwd=os.getcwd())
+    logging.info('[%s - %s] gn gen completed', cpu, flavor)
+    subprocess.check_call(
+        [autoninja, '-C', out_dir, 'third_party/abseil-cpp:absl_component_deps'],
+        cwd=os.getcwd())
+    logging.info('[%s - %s] autoninja completed', cpu, flavor)
+
+    obj_files = []
+    for root, _dirnames, filenames in os.walk(
+        os.path.join(out_dir, 'obj', 'third_party', 'abseil-cpp')):
+      matched_files = fnmatch.filter(filenames, '*.obj')
+      obj_files.extend((os.path.join(root, f) for f in matched_files))
+
+    logging.info('[%s - %s] Found %d object files.', cpu, flavor, len(obj_files))
+
+    absl_symbols = set()
+    dll_exports = set()
+    if sys.platform == 'win32':
+      for f in obj_files:
+        # Track all of the functions exported with __declspec(dllexport) and
+        # don't list them in the .def file - double-exports are not allowed. The
+        # error is "lld-link: error: duplicate /export option".
+        exports_out = subprocess.check_output(['dumpbin', '/directives', f], cwd=os.getcwd())
+        for line in exports_out.splitlines():
+          line = line.decode('utf-8')
+          match = re.match(ABSL_EXPORTED_RE, line)
+          if match:
+            dll_exports.add(match.groups()[0])
+    for f in obj_files:
+      stdout = subprocess.check_output(symbol_dumper + [f], cwd=os.getcwd())
+      for line in stdout.splitlines():
+        try:
+          line = line.decode('utf-8')
+        except UnicodeDecodeError:
+          # Due to a dumpbin bug there are sometimes invalid utf-8 characters in
+          # the output. This only happens on an unimportant line so it can
+          # safely and silently be skipped.
+          # https://developercommunity.visualstudio.com/content/problem/1091330/dumpbin-symbols-produces-randomly-wrong-output-on.html
+          continue
+        match = re.match(ABSL_SYM_RE, line)
+        if match:
+          symbol = match.group('symbol')
+          assert symbol.count(' ') == 0, ('Regex matched too much, probably got '
+                                          'undecorated name as well')
+          # Avoid getting names exported with dllexport, to avoid
+          # "lld-link: error: duplicate /export option" on symbols such as:
+          # ?kHexChar@numbers_internal@absl@@3QBDB
+          if symbol in dll_exports:
+            continue
+          # Avoid to export deleting dtors since they trigger
+          # "lld-link: error: export of deleting dtor" linker errors, see
+          # crbug.com/1201277.
+          if symbol.startswith('??_G'):
+            continue
+          absl_symbols.add(symbol)
+
+    logging.info('[%s - %s] Found %d absl symbols.', cpu, flavor, len(absl_symbols))
+
+    if extra_gn_args:
+      def_file = os.path.join('third_party', 'abseil-cpp',
+                              'symbols_{}_{}_{}.def'.format(cpu, flavor, suffix))
+    else:
+      def_file = os.path.join('third_party', 'abseil-cpp',
+                             'symbols_{}_{}.def'.format(cpu, flavor))
+
+    with open(def_file, 'w', newline='') as f:
+      f.write('EXPORTS\n')
+      for s in sorted(absl_symbols):
+        f.write('    {}\n'.format(s))
+
+    # Hack, it looks like there is a race in the directory cleanup.
+    time.sleep(10)
+
+  logging.info('[%s - %s] .def file successfully generated.', cpu, flavor)
+
+
+if __name__ == '__main__':
+  logging.getLogger().setLevel(logging.INFO)
+
+  if sys.version_info.major == 2:
+    logging.error('This script requires Python 3.')
+    exit(1)
+
+  if not os.getcwd().endswith('src') or not os.path.exists('chrome/browser'):
+    logging.error('Run this script from a chromium/src/ directory.')
+    exit(1)
+
+  _GenerateDefFile('x86', True)
+  _GenerateDefFile('x86', False)
+  _GenerateDefFile('x64', True)
+  _GenerateDefFile('x64', False)
+  _GenerateDefFile('x64', False, ['is_asan = true'], 'asan')
+  _GenerateDefFile('arm64', True)
+  _GenerateDefFile('arm64', False)
diff --git a/third_party/abseil-cpp/patches/0001-Turn-on-hardened-mode.patch b/third_party/abseil-cpp/patches/0001-Turn-on-hardened-mode.patch
new file mode 100644
index 0000000000..6881a08639
--- /dev/null
+++ b/third_party/abseil-cpp/patches/0001-Turn-on-hardened-mode.patch
@@ -0,0 +1,63 @@
+From 15f51edf989cc47588c3d8635a62c255cdeb0072 Mon Sep 17 00:00:00 2001
+From: Daniel Cheng <dcheng@chromium.org>
+Date: Wed, 6 Oct 2021 03:23:23 -0700
+Subject: [PATCH] Turn on hardened mode and alias absl types to STL types..
+
+The absl implementations contain various hardening checks that are
+sometimes simply UB as defined by the standard, and thus, as
+implemented by STL.
+---
+ third_party/abseil-cpp/absl/base/options.h | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/third_party/abseil-cpp/absl/base/options.h b/third_party/abseil-cpp/absl/base/options.h
+index 230bf1eecc4a4..1641271cd3ff9 100644
+--- a/third_party/abseil-cpp/absl/base/options.h
++++ b/third_party/abseil-cpp/absl/base/options.h
+@@ -100,7 +100,7 @@
+ // User code should not inspect this macro.  To check in the preprocessor if
+ // absl::any is a typedef of std::any, use the feature macro ABSL_USES_STD_ANY.
+ 
+-#define ABSL_OPTION_USE_STD_ANY 2
++#define ABSL_OPTION_USE_STD_ANY 0
+ 
+ 
+ // ABSL_OPTION_USE_STD_OPTIONAL
+@@ -127,7 +127,7 @@
+ // absl::optional is a typedef of std::optional, use the feature macro
+ // ABSL_USES_STD_OPTIONAL.
+ 
+-#define ABSL_OPTION_USE_STD_OPTIONAL 2
++#define ABSL_OPTION_USE_STD_OPTIONAL 0
+ 
+ 
+ // ABSL_OPTION_USE_STD_STRING_VIEW
+@@ -154,7 +154,7 @@
+ // absl::string_view is a typedef of std::string_view, use the feature macro
+ // ABSL_USES_STD_STRING_VIEW.
+ 
+-#define ABSL_OPTION_USE_STD_STRING_VIEW 2
++#define ABSL_OPTION_USE_STD_STRING_VIEW 0
+ 
+ // ABSL_OPTION_USE_STD_VARIANT
+ //
+@@ -180,7 +180,7 @@
+ // absl::variant is a typedef of std::variant, use the feature macro
+ // ABSL_USES_STD_VARIANT.
+ 
+-#define ABSL_OPTION_USE_STD_VARIANT 2
++#define ABSL_OPTION_USE_STD_VARIANT 0
+ 
+ 
+ // ABSL_OPTION_USE_INLINE_NAMESPACE
+@@ -233,6 +233,6 @@
+ // checks enabled by this option may abort the program in a different way and
+ // log additional information when `NDEBUG` is not defined.
+ 
+-#define ABSL_OPTION_HARDENED 0
++#define ABSL_OPTION_HARDENED 1
+ 
+ #endif  // ABSL_BASE_OPTIONS_H_
+-- 
+2.33.0.882.g93a45727a2-goog
+
diff --git a/third_party/abseil-cpp/patches/0002-delete-unprefixed-annotations.patch b/third_party/abseil-cpp/patches/0002-delete-unprefixed-annotations.patch
new file mode 100644
index 0000000000..985c547fd8
--- /dev/null
+++ b/third_party/abseil-cpp/patches/0002-delete-unprefixed-annotations.patch
@@ -0,0 +1,92 @@
+diff --git a/third_party/abseil-cpp/absl/base/dynamic_annotations.h b/third_party/abseil-cpp/absl/base/dynamic_annotations.h
+index 1444dc48e283..6687291cade3 100644
+--- a/third_party/abseil-cpp/absl/base/dynamic_annotations.h
++++ b/third_party/abseil-cpp/absl/base/dynamic_annotations.h
+@@ -49,9 +49,6 @@
+ 
+ #include "absl/base/config.h"
+ 
+-// TODO(rogeeff): Remove after the backward compatibility period.
+-#include "absl/base/internal/dynamic_annotations.h"  // IWYU pragma: export
+-
+ // -------------------------------------------------------------------------
+ // Decide which features are enabled
+ 
+diff --git a/third_party/abseil-cpp/absl/base/thread_annotations.h b/third_party/abseil-cpp/absl/base/thread_annotations.h
+index 5f51c0c2d2d5..10b9bde551a7 100644
+--- a/third_party/abseil-cpp/absl/base/thread_annotations.h
++++ b/third_party/abseil-cpp/absl/base/thread_annotations.h
+@@ -35,8 +35,6 @@
+ #define ABSL_BASE_THREAD_ANNOTATIONS_H_
+ 
+ #include "absl/base/config.h"
+-// TODO(mbonadei): Remove after the backward compatibility period.
+-#include "absl/base/internal/thread_annotations.h"  // IWYU pragma: export
+ 
+ #if defined(__clang__)
+ #define ABSL_INTERNAL_THREAD_ANNOTATION_ATTRIBUTE(x) __attribute__((x))
+diff --git a/third_party/abseil-cpp/absl/base/BUILD.bazel b/third_party/abseil-cpp/absl/base/BUILD.bazel
+index 65ff0ddef9fd..d6fbf3581158 100644
+--- a/third_party/abseil-cpp/absl/base/BUILD.bazel
++++ b/third_party/abseil-cpp/absl/base/BUILD.bazel
+@@ -115,9 +115,6 @@ cc_library(
+
+ cc_library(
+     name = "dynamic_annotations",
+-    srcs = [
+-        "internal/dynamic_annotations.h",
+-    ],
+     hdrs = [
+         "dynamic_annotations.h",
+     ],
+@@ -131,9 +128,6 @@ cc_library(
+
+ cc_library(
+     name = "core_headers",
+-    srcs = [
+-        "internal/thread_annotations.h",
+-    ],
+     hdrs = [
+         "attributes.h",
+         "const_init.h",
+diff --git a/third_party/abseil-cpp/CMake/AbseilDll.cmake b/third_party/abseil-cpp/CMake/AbseilDll.cmake
+index 00cddb84c6b7f..a2b8b103885a6 100644
+--- a/third_party/abseil-cpp/CMake/AbseilDll.cmake
++++ b/third_party/abseil-cpp/CMake/AbseilDll.cmake
+@@ -14,7 +14,6 @@ set(ABSL_INTERNAL_DLL_FILES
+   "base/internal/cycleclock.cc"
+   "base/internal/cycleclock.h"
+   "base/internal/direct_mmap.h"
+-  "base/internal/dynamic_annotations.h"
+   "base/internal/endian.h"
+   "base/internal/errno_saver.h"
+   "base/internal/fast_type_id.h"
+@@ -41,7 +40,6 @@ set(ABSL_INTERNAL_DLL_FILES
+   "base/internal/spinlock_wait.h"
+   "base/internal/sysinfo.cc"
+   "base/internal/sysinfo.h"
+-  "base/internal/thread_annotations.h"
+   "base/internal/thread_identity.cc"
+   "base/internal/thread_identity.h"
+   "base/internal/throw_delegate.cc"
+diff --git a/third_party/abseil-cpp/absl/base/CMakeLists.txt b/third_party/abseil-cpp/absl/base/CMakeLists.txt
+index ed55093abe80f..6908182e97c86 100644
+--- a/third_party/abseil-cpp/absl/base/CMakeLists.txt
++++ b/third_party/abseil-cpp/absl/base/CMakeLists.txt
+@@ -109,8 +109,6 @@ absl_cc_library(
+     dynamic_annotations
+   HDRS
+     "dynamic_annotations.h"
+-  SRCS
+-    "internal/dynamic_annotations.h"
+   COPTS
+     ${ABSL_DEFAULT_COPTS}
+   DEPS
+@@ -128,7 +126,6 @@ absl_cc_library(
+     "optimization.h"
+     "port.h"
+     "thread_annotations.h"
+-    "internal/thread_annotations.h"
+   COPTS
+     ${ABSL_DEFAULT_COPTS}
+   DEPS
diff --git a/third_party/abseil-cpp/patches/0003-delete-static-initializer-in-stacktrace.patch b/third_party/abseil-cpp/patches/0003-delete-static-initializer-in-stacktrace.patch
new file mode 100644
index 0000000000..0d11593d2f
--- /dev/null
+++ b/third_party/abseil-cpp/patches/0003-delete-static-initializer-in-stacktrace.patch
@@ -0,0 +1,31 @@
+diff --git a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc
+index b2792a1f3ada..b94c61233ba3 100644
+--- a/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc
++++ b/third_party/abseil-cpp/absl/debugging/internal/stacktrace_generic-inl.inc
+@@ -43,17 +43,6 @@ static __thread int recursive = 0;
+ // glibc implementation itself will trigger malloc the first time it is called.
+ // As such, we suppress usage of backtrace during this early stage of execution.
+ static std::atomic<bool> disable_stacktraces(true);  // Disabled until healthy.
+-// Waiting until static initializers run seems to be late enough.
+-// This file is included into stacktrace.cc so this will only run once.
+-ABSL_ATTRIBUTE_UNUSED static int stacktraces_enabler = []() {
+-  void* unused_stack[1];
+-  // Force the first backtrace to happen early to get the one-time shared lib
+-  // loading (allocation) out of the way. After the first call it is much safer
+-  // to use backtrace from a signal handler if we crash somewhere later.
+-  backtrace(unused_stack, 1);
+-  disable_stacktraces.store(false, std::memory_order_relaxed);
+-  return 0;
+-}();
+ 
+ template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
+ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
+@@ -99,7 +88,7 @@ namespace absl {
+ ABSL_NAMESPACE_BEGIN
+ namespace debugging_internal {
+ bool StackTraceWorksForTest() {
+-  return true;
++  return false;
+ }
+ }  // namespace debugging_internal
+ ABSL_NAMESPACE_END
diff --git a/third_party/abseil-cpp/roll_abseil.py b/third_party/abseil-cpp/roll_abseil.py
new file mode 100755
index 0000000000..365b460290
--- /dev/null
+++ b/third_party/abseil-cpp/roll_abseil.py
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+
+"""Script to do the first step of Abseil roll into chromium.
+"""
+
+import logging
+import os
+import re
+import subprocess
+import tempfile
+from datetime import datetime
+
+ABSL_URI = 'https://github.com/abseil/abseil-cpp.git'
+
+def _PullAbseil(abseil_dir):
+  logging.info('Updating abseil...')
+  subprocess.check_call(['git', 'clone', ABSL_URI],
+                        cwd=abseil_dir)
+
+def _SyncChromium(chromium_dir):
+  logging.info('Updating chromium...')
+  subprocess.check_call(['git', 'checkout', 'main'], cwd=chromium_dir)
+  subprocess.check_call(['git', 'pull', '--rebase'], cwd=chromium_dir)
+  subprocess.check_call(['gclient', 'sync'], cwd=chromium_dir)
+
+
+def _UpdateChromiumReadme(readme_filename, abseil_dir):
+  logging.info('Updating ' + readme_filename)
+
+  stdout = subprocess.check_output(['git', 'log', '-n1', '--pretty=short'],
+                                   cwd=abseil_dir)
+  new_revision = re.search('commit\\s(.{40})', str(stdout)).group(1)
+
+  with open(readme_filename, 'r+') as f:
+    content = f.read()
+    prefix = 'Revision: '
+    pos = content.find(prefix)
+    assert(pos > 0)
+    pos = pos + len(prefix)
+    old_revision = content[pos:pos+40]
+    f.seek(pos)
+    f.write(new_revision)
+
+  logging.info('Abseil old revision is ' + old_revision)
+  logging.info('Abseil new revision is ' + new_revision)
+  return old_revision[0:10] + '..' + new_revision[0:10]
+
+
+def _UpdateAbseilInChromium(abseil_dir, chromium_dir):
+ logging.info('Syncing abseil in chromium/src/third_party...')
+ exclude = [
+   '*BUILD.gn',
+   'DIR_METADATA',
+   'README.chromium',
+   'OWNERS',
+   '.gitignore',
+   '.git',
+   '*.gni',
+   '*clang-format',
+   'patches/*',
+   'patches',
+   'absl_hardening_test.cc',
+   'roll_abseil.py',
+   'generate_def_files.py',
+   '*.def',
+ ]
+ params = ['rsync', '-aP', abseil_dir, os.path.join(chromium_dir, 'third_party'), '--delete']
+ for e in exclude:
+   params.append('--exclude={}'.format(e))
+ subprocess.check_call(params, cwd=chromium_dir)
+
+
+def _PatchAbseil(abseil_in_chromium_dir):
+  logging.info('Patching abseil...')
+  for patch in os.listdir(os.path.join(abseil_in_chromium_dir, 'patches')):
+    subprocess.check_call(['patch', '--strip', '1', '-i', os.path.join(abseil_in_chromium_dir, 'patches', patch)])
+
+  os.remove(os.path.join(abseil_in_chromium_dir, 'absl', 'base', 'internal', 'thread_annotations.h'))
+  os.remove(os.path.join(abseil_in_chromium_dir, 'absl', 'base', 'internal', 'dynamic_annotations.h'))
+
+
+def _Commit(chromium_dir, hash_diff):
+  logging.info('Commit...')
+  desc="""Roll abseil_revision {0}
+
+Change Log:
+https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+log/{0}
+Full diff:
+https://chromium.googlesource.com/external/github.com/abseil/abseil-cpp/+/{0}
+Bug: None""".format(hash_diff)
+
+  subprocess.check_call(['git', 'add', 'third_party/abseil-cpp'], cwd=chromium_dir)
+  subprocess.check_call(['git', 'commit', '-m', desc], cwd=chromium_dir)
+
+  logging.info('Upload...')
+  subprocess.check_call(['git', 'cl', 'upload', '-m', desc, '--bypass-hooks'], cwd=chromium_dir)
+
+
+def _Roll():
+  chromium_dir = os.getcwd()
+  abseil_in_chromium_dir = os.path.join(chromium_dir, 'third_party', 'abseil-cpp')
+  _SyncChromium(chromium_dir)
+
+  branch_name = datetime.today().strftime('rolling-absl-%Y%m%d')
+  logging.info('Creating branch ' + branch_name + ' for the roll...')
+  subprocess.check_call(['git', 'checkout', '-b', branch_name], cwd=chromium_dir)
+
+  with tempfile.TemporaryDirectory() as abseil_root:
+    _PullAbseil(abseil_root)
+    abseil_dir = os.path.join(abseil_root, 'abseil-cpp')
+    _UpdateAbseilInChromium(abseil_dir, chromium_dir)
+    hash_diff = _UpdateChromiumReadme(os.path.join(abseil_in_chromium_dir, 'README.chromium'),
+                                      abseil_dir)
+
+  _PatchAbseil(abseil_in_chromium_dir)
+  _Commit(chromium_dir, hash_diff)
+
+
+if __name__ == '__main__':
+  logging.getLogger().setLevel(logging.INFO)
+
+  if os.getcwd().endswith('src') and os.path.exists('chrome/browser'):
+    _Roll()
+
+    logging.info("Next step is manual: Fix BUILD.gn files to match BUILD.bazel changes.")
+    logging.info("After that run generate_def_files.py. ")
+  else:
+    logging.error('Run this script from a chromium/src/ directory.')
+
+
diff --git a/third_party/abseil-cpp/symbols_arm64_dbg.def b/third_party/abseil-cpp/symbols_arm64_dbg.def
new file mode 100644
index 0000000000..7a2e81ffd2
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_arm64_dbg.def
@@ -0,0 +1,3908 @@
+EXPORTS
+    ??$?0$$CBD$0A@@VoidPtr@str_format_internal@absl@@QEAA@PEBD@Z
+    ??$?0$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@QEAA@P6A_NPEBU?$atomic@_N@Cr@std@@@Z0@Z
+    ??$?0$$CBUCordRep@cord_internal@absl@@@Hex@absl@@QEAA@PEBUCordRep@cord_internal@1@W4PadSpec@1@@Z
+    ??$?0$$CBVFormatArgImpl@str_format_internal@absl@@$$CBV012@@?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@V?$initializer_list@VFormatArgImpl@str_format_internal@absl@@@std@@@Z
+    ??$?0$$T@?$Storage@PEAPEAUCordRep@cord_internal@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEA$$T@Z
+    ??$?0$$T@?$Storage@PEAPEAVLogSink@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEA$$T@Z
+    ??$?0$$T@?$Storage@PEAUPayload@status_internal@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEA$$T@Z
+    ??$?0$$TAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAPEAVCordzHandle@cord_internal@absl@@AEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@?$__compressed_pair@PEAPEAVLogSink@absl@@AEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEAVLogSink@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAPEBVCordzHandle@cord_internal@absl@@AEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@AEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUViableSubstitution@strings_internal@absl@@AEAV?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEAVCordzHandle@cord_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEAVLogSink@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEBVCordzHandle@cord_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUTransition@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUTransitionType@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUViableSubstitution@strings_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAVFormatArgImpl@str_format_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$V@?$__temp_value@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$V@?$__temp_value@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$Y_And@Cr@std@@$0A@@?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@QEAA@AEBVstring_view@absl@@AEBH@Z
+    ??$?0$00X@?$__compressed_pair@U?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@23@@Cr@std@@QEAA@XZ
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+    ??$ArgumentToConv@I@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
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+    ??$ArgumentToConv@PEBD@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@UVoidPtr@str_format_internal@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
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+    ??$ArgumentToConv@Vint128@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@Vstring_view@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
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+    ??$ArgumentToConv@_K@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
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+    ??$CallOnceImpl@A6AXXZ$$V@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@W4SchedulingMode@01@A6AXXZ@Z
+    ??$CastAndCallFunction@$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@CA_NPEBV01@@Z
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+    ??$Invoke@VMixingHashState@hash_internal@absl@@_K@UniquelyRepresentedProbe@HashSelect@hash_internal@absl@@SA?AVMixingHashState@23@V423@AEB_K@Z
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+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$SharedCompareImpl@VCord@absl@@@absl@@YAHAEBVCord@0@0@Z
+    ??$SharedCompareImpl@Vstring_view@absl@@@absl@@YAHAEBVCord@0@AEBVstring_view@0@@Z
+    ??$SmallMemmove@$00@cord_internal@absl@@YAXPEADPEBD_K@Z
+    ??$SmallMemmove@$0A@@cord_internal@absl@@YAXPEADPEBD_K@Z
+    ??$StrAppend@$$V@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@0@1111@Z
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+    ??$ToInt@G@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@PEBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@VFormatArgImpl@str_format_internal@absl@@@FormatArgImplFriend@str_format_internal@absl@@SA_NVFormatArgImpl@12@PEAH@Z
+    ??$ToInt@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToIntVal@C@FormatArgImpl@str_format_internal@absl@@CAHAEBC@Z
+    ??$ToIntVal@D@FormatArgImpl@str_format_internal@absl@@CAHAEBD@Z
+    ??$ToIntVal@E@FormatArgImpl@str_format_internal@absl@@CAHAEBE@Z
+    ??$ToIntVal@F@FormatArgImpl@str_format_internal@absl@@CAHAEBF@Z
+    ??$ToIntVal@G@FormatArgImpl@str_format_internal@absl@@CAHAEBG@Z
+    ??$ToIntVal@H@FormatArgImpl@str_format_internal@absl@@CAHAEBH@Z
+    ??$ToIntVal@I@FormatArgImpl@str_format_internal@absl@@CAHAEBI@Z
+    ??$ToIntVal@J@FormatArgImpl@str_format_internal@absl@@CAHAEBJ@Z
+    ??$ToIntVal@K@FormatArgImpl@str_format_internal@absl@@CAHAEBK@Z
+    ??$ToIntVal@_J@FormatArgImpl@str_format_internal@absl@@CAHAEB_J@Z
+    ??$ToIntVal@_K@FormatArgImpl@str_format_internal@absl@@CAHAEB_K@Z
+    ??$ToIntVal@_N@FormatArgImpl@str_format_internal@absl@@CAHAEB_N@Z
+    ??$TrailingZeros@_K@container_internal@absl@@YAI_K@Z
+    ??$UnhidePtr@X@base_internal@absl@@YAPEAX_K@Z
+    ??$__advance@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEBUTransition@cctz@time_internal@absl@@_JUrandom_access_iterator_tag@01@@Z
+    ??$__advance@PEBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAXAEAPEBVFormatArgImpl@str_format_internal@absl@@_JUrandom_access_iterator_tag@01@@Z
+    ??$__allocate_at_least@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEAVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEAVLogSink@absl@@@01@AEAV?$allocator@PEAVLogSink@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEBVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUTransition@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUTransitionType@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUViableSubstitution@strings_internal@absl@@@01@AEAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAVFormatArgImpl@str_format_internal@absl@@@01@AEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@_K@Z
+    ??$__construct_at_end@PEBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAXPEBVFormatArgImpl@str_format_internal@absl@@0_K@Z
+    ??$__construct_at_end@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_node_hash@AEBUpiecewise_construct_t@Cr@std@@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAA?AV?$unique_ptr@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@V?$__hash_node_destructor@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@23@@12@_KAEBUpiecewise_construct_t@12@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QEAV?$tuple@$$V@12@@Z
+    ??$__construct_one_at_end@$$V@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXXZ
+    ??$__construct_one_at_end@$$V@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXXZ
+    ??$__construct_one_at_end@AEAVstring_view@absl@@AEBV12@AEA_K@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEAVstring_view@absl@@AEBV34@AEA_K@Z
+    ??$__construct_one_at_end@AEBQEAVCordzHandle@cord_internal@absl@@@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVCordzHandle@cord_internal@absl@@@Z
+    ??$__construct_one_at_end@AEBQEAVLogSink@absl@@@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVLogSink@absl@@@Z
+    ??$__construct_one_at_end@AEBQEBVCordzHandle@cord_internal@absl@@@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEBVCordzHandle@cord_internal@absl@@@Z
+    ??$__construct_one_at_end@AEBUTransition@cctz@time_internal@absl@@@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBUTransition@cctz@time_internal@absl@@@Z
+    ??$__construct_one_at_end@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAX$$QEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__copy@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@PEAV123@$0A@@Cr@std@@YA?AU?$pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@01@PEBVFormatArgImpl@str_format_internal@absl@@0PEAV345@@Z
+    ??$__copy_impl@$$CBVFormatArgImpl@str_format_internal@absl@@V123@X@Cr@std@@YA?AU?$pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@01@PEBVFormatArgImpl@str_format_internal@absl@@0PEAV345@@Z
+    ??$__cxx_atomic_compare_exchange_strong@PEAVTimeZone@absl@@@Cr@std@@YA_NPEAU?$__cxx_atomic_base_impl@PEAVTimeZone@absl@@@01@PEAPEAVTimeZone@absl@@PEAV34@W4memory_order@01@3@Z
+    ??$__cxx_atomic_compare_exchange_weak@PEAUHashtablezInfo@container_internal@absl@@@Cr@std@@YA_NPEAU?$__cxx_atomic_base_impl@PEAUHashtablezInfo@container_internal@absl@@@01@PEAPEAUHashtablezInfo@container_internal@absl@@PEAU345@W4memory_order@01@3@Z
+    ??$__cxx_atomic_load@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z@Cr@std@@YAP6AXAEBUHashtablezInfo@container_internal@absl@@@ZPEBU?$__cxx_atomic_base_impl@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAUHashtablezInfo@container_internal@absl@@@Cr@std@@YAPEAUHashtablezInfo@container_internal@absl@@PEBU?$__cxx_atomic_base_impl@PEAUHashtablezInfo@container_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAPEAVCordzHandle@cord_internal@absl@@PEBU?$__cxx_atomic_base_impl@PEAVCordzHandle@cord_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAVCordzInfo@cord_internal@absl@@@Cr@std@@YAPEAVCordzInfo@cord_internal@absl@@PEBU?$__cxx_atomic_base_impl@PEAVCordzInfo@cord_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAVTimeZone@absl@@@Cr@std@@YAPEAVTimeZone@absl@@PEBU?$__cxx_atomic_base_impl@PEAVTimeZone@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@W4OnDeadlockCycle@absl@@@Cr@std@@YA?AW4OnDeadlockCycle@absl@@PEBU?$__cxx_atomic_base_impl@W4OnDeadlockCycle@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@W4State@PerThreadSynch@base_internal@absl@@@Cr@std@@YA?AW4State@PerThreadSynch@base_internal@absl@@PEBU?$__cxx_atomic_base_impl@W4State@PerThreadSynch@base_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@PEAVCordzHandle@cord_internal@absl@@@01@PEAVCordzHandle@cord_internal@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@PEAVCordzInfo@cord_internal@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@PEAVCordzInfo@cord_internal@absl@@@01@PEAVCordzInfo@cord_internal@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@W4OnDeadlockCycle@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@W4OnDeadlockCycle@absl@@@01@W4OnDeadlockCycle@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@W4State@PerThreadSynch@base_internal@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@W4State@PerThreadSynch@base_internal@absl@@@01@W4State@PerThreadSynch@base_internal@absl@@W4memory_order@01@@Z
+    ??$__debug_db_erase_c@V?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$unordered_map@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@@Cr@std@@YAXPEAV?$unordered_map@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@@Cr@std@@YAXPEAV?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__destroy_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@PEAUCordRep@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAUCordRep@cord_internal@absl@@@Z
+    ??$__destroy_at@PEAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAVCordzHandle@cord_internal@absl@@@Z
+    ??$__destroy_at@PEAVLogSink@absl@@$0A@@Cr@std@@YAXPEAPEAVLogSink@absl@@@Z
+    ??$__destroy_at@PEBVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEBVCordzHandle@cord_internal@absl@@@Z
+    ??$__destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$__destroy_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPEAUPayload@status_internal@absl@@@Z
+    ??$__destroy_at@UTransition@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransition@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@UTransitionType@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@UViableSubstitution@strings_internal@absl@@$0A@@Cr@std@@YAXPEAUViableSubstitution@strings_internal@absl@@@Z
+    ??$__destroy_at@VFormatArgImpl@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$__distance@PEBUPayload@status_internal@absl@@@Cr@std@@YA_JPEBUPayload@status_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YA_JPEBUTransition@cctz@time_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@PEBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YA_JPEBVFormatArgImpl@str_format_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__do_rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAAX_K@Z
+    ??$__emplace_back_slow_path@AEAVstring_view@absl@@AEBV12@AEA_K@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEAVstring_view@absl@@AEBV34@AEA_K@Z
+    ??$__emplace_unique_key_args@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBUpiecewise_construct_t@23@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QEAA?AU?$pair@V?$__hash_iterator@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@_N@12@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@AEBUpiecewise_construct_t@12@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QEAV?$tuple@$$V@12@@Z
+    ??$__invoke@AEAUByCivilTime@Transition@cctz@time_internal@absl@@AEBU2345@AEBU2345@@Cr@std@@YA_NAEAUByCivilTime@Transition@cctz@time_internal@absl@@AEBU3456@1@Z
+    ??$__invoke@AEAUByUnixTime@Transition@cctz@time_internal@absl@@AEBU2345@AEBU2345@@Cr@std@@YA_NAEAUByUnixTime@Transition@cctz@time_internal@absl@@AEBU3456@1@Z
+    ??$__invoke@AEAU__identity@Cr@std@@AEBUTransition@cctz@time_internal@absl@@@Cr@std@@YAAEBUTransition@cctz@time_internal@absl@@AEAU__identity@01@AEBU2345@@Z
+    ??$__launder@$$CBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEBU201@@Z
+    ??$__launder@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEAU201@@Z
+    ??$__lower_bound_impl@U_ClassicAlgPolicy@Cr@std@@PEBUTransition@cctz@time_internal@absl@@PEBU4567@U4567@U__identity@23@UByUnixTime@4567@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@AEAUByUnixTime@2345@AEAU__identity@01@@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV45678@PEAPEAPEBV45678@@Cr@std@@YA?AU?$pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@01@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAPEAVLogSink@absl@@PEAPEAV45@PEAPEAV45@@Cr@std@@YA?AU?$pair@PEAPEAVLogSink@absl@@PEAPEAV12@@01@PEAPEAVLogSink@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@PEAU4567@@Cr@std@@YA?AU?$pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransition@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@PEAU4567@@Cr@std@@YA?AU?$pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransitionType@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAPEAVLogSink@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVLogSink@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV45678@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV45678@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@UTransition@cctz@time_internal@absl@@U4567@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@UTransitionType@cctz@time_internal@absl@@U4567@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEAVLogSink@absl@@PEAPEAV45@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVLogSink@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV45678@X@Cr@std@@YA?AU?$pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@01@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUViableSubstitution@strings_internal@absl@@PEAU456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAVCordzHandle@cord_internal@absl@@PEAV456@X@Cr@std@@YA?AU?$pair@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@@01@PEAPEAVCordzHandle@cord_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAVLogSink@absl@@PEAV45@X@Cr@std@@YA?AU?$pair@PEAPEAVLogSink@absl@@PEAPEAV12@@01@PEAPEAVLogSink@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEBVCordzHandle@cord_internal@absl@@PEBV456@X@Cr@std@@YA?AU?$pair@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@@01@PEAPEBVCordzHandle@cord_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@@01@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UTransition@cctz@time_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransition@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UTransitionType@cctz@time_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransitionType@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UViableSubstitution@strings_internal@absl@@U456@X@Cr@std@@YA?AU?$pair@PEAUViableSubstitution@strings_internal@absl@@PEAU123@@01@PEAUViableSubstitution@strings_internal@absl@@00@Z
+    ??$__push_back_slow_path@AEBQEAVCordzHandle@cord_internal@absl@@@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVCordzHandle@cord_internal@absl@@@Z
+    ??$__push_back_slow_path@AEBQEAVLogSink@absl@@@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVLogSink@absl@@@Z
+    ??$__push_back_slow_path@AEBQEBVCordzHandle@cord_internal@absl@@@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEBVCordzHandle@cord_internal@absl@@@Z
+    ??$__push_back_slow_path@AEBUTransition@cctz@time_internal@absl@@@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBUTransition@cctz@time_internal@absl@@@Z
+    ??$__push_back_slow_path@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAX$$QEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAAX_K@Z
+    ??$__rewrap_iter@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@U?$__unwrap_iter_impl@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@0@Z
+    ??$__rewrap_iter@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@U?$__unwrap_iter_impl@PEAPEAVCordzHandle@cord_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@0@Z
+    ??$__rewrap_iter@PEAPEAVLogSink@absl@@PEAPEAV12@U?$__unwrap_iter_impl@PEAPEAVLogSink@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@0@Z
+    ??$__rewrap_iter@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@U?$__unwrap_iter_impl@PEAPEBVCordzHandle@cord_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@0@Z
+    ??$__rewrap_iter@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@U?$__unwrap_iter_impl@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@0@Z
+    ??$__rewrap_iter@PEAUTransition@cctz@time_internal@absl@@PEAU1234@U?$__unwrap_iter_impl@PEAUTransition@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@0@Z
+    ??$__rewrap_iter@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@U?$__unwrap_iter_impl@PEAUTransitionType@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@0@Z
+    ??$__rewrap_iter@PEAUViableSubstitution@strings_internal@absl@@PEAU123@U?$__unwrap_iter_impl@PEAUViableSubstitution@strings_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@0@Z
+    ??$__rewrap_iter@PEAVFormatArgImpl@str_format_internal@absl@@PEAV123@U?$__unwrap_iter_impl@PEAVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEAV234@0@Z
+    ??$__rewrap_iter@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@U?$__unwrap_iter_impl@PEBVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_range@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@PEBV123@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@0@Z
+    ??$__to_address@$$CBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@@Z
+    ??$__to_address@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@@Z
+    ??$__to_address@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@@Z
+    ??$__to_address@PEAVLogSink@absl@@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@@Z
+    ??$__to_address@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@@Z
+    ??$__to_address@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@@Z
+    ??$__to_address@UTransition@cctz@time_internal@absl@@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__to_address@UTransitionType@cctz@time_internal@absl@@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__to_address@UViableSubstitution@strings_internal@absl@@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@@Z
+    ??$__to_address@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEAV234@@Z
+    ??$__uninitialized_allocator_copy@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@VFormatArgImpl@str_format_internal@absl@@V456@$0A@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@AEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@PEBV234@1PEAV234@@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@23@V423@PEAVCordzHandle@cord_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$reverse_iterator@PEAPEAVLogSink@absl@@@23@V423@PEAVLogSink@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@AEAV?$allocator@PEAVLogSink@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@23@V423@PEBVCordzHandle@cord_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@23@V423@UConversionItem@ParsedFormatBase@str_format_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@U4567@X@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@01@PEAU2345@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@23@V423@UTransition@cctz@time_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@U4567@X@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@PEAU2345@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@23@V423@UTransitionType@cctz@time_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@23@V423@UViableSubstitution@strings_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@AEAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@V201@11@Z
+    ??$__unwrap_iter@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@@Z
+    ??$__unwrap_iter@PEAPEAVCordzHandle@cord_internal@absl@@U?$__unwrap_iter_impl@PEAPEAVCordzHandle@cord_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@@Z
+    ??$__unwrap_iter@PEAPEAVLogSink@absl@@U?$__unwrap_iter_impl@PEAPEAVLogSink@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@@Z
+    ??$__unwrap_iter@PEAPEBVCordzHandle@cord_internal@absl@@U?$__unwrap_iter_impl@PEAPEBVCordzHandle@cord_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@@Z
+    ??$__unwrap_iter@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@U?$__unwrap_iter_impl@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@@Z
+    ??$__unwrap_iter@PEAUTransition@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PEAUTransition@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__unwrap_iter@PEAUTransitionType@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PEAUTransitionType@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__unwrap_iter@PEAUViableSubstitution@strings_internal@absl@@U?$__unwrap_iter_impl@PEAUViableSubstitution@strings_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@@Z
+    ??$__unwrap_iter@PEAVFormatArgImpl@str_format_internal@absl@@U?$__unwrap_iter_impl@PEAVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEAV234@@Z
+    ??$__unwrap_iter@PEBVFormatArgImpl@str_format_internal@absl@@U?$__unwrap_iter_impl@PEBVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@V201@@Z
+    ??$__unwrap_range@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@@Cr@std@@YA?A?<auto>@@PEBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByCivilTime@Transition@cctz@time_internal@absl@@PEBU5678@PEBU5678@U5678@U__identity@23@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@$$QEAUByCivilTime@2345@$$QEAU__identity@01@@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByUnixTime@Transition@cctz@time_internal@absl@@PEBU5678@PEBU5678@U5678@U__identity@23@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@$$QEAUByUnixTime@2345@$$QEAU__identity@01@@Z
+    ??$advance@PEBUTransition@cctz@time_internal@absl@@_J@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAXAEAPEBUTransition@cctz@time_internal@absl@@_J@Z
+    ??$advance@PEBUTransition@cctz@time_internal@absl@@_J_JX@Cr@std@@YAXAEAPEBUTransition@cctz@time_internal@absl@@_J@Z
+    ??$advance@PEBVFormatArgImpl@str_format_internal@absl@@_K_KX@Cr@std@@YAXAEAPEBVFormatArgImpl@str_format_internal@absl@@_K@Z
+    ??$assign@PEBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAAXPEBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$assign@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$call_once@A6AXXZ$$V@absl@@YAXAEAVonce_flag@0@A6AXXZ@Z
+    ??$combine@H$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEBH@Z
+    ??$combine@V?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEBV?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@@Z
+    ??$combine@Vstring_view@absl@@H@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEBVstring_view@2@AEBH@Z
+    ??$combine@_K$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEB_K@Z
+    ??$combine_contiguous@D@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@PEBD_K@Z
+    ??$construct@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEAPEBV12345@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEAPEBV45678@@Z
+    ??$construct@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV12345@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$$QEAPEAPEBV45678@@Z
+    ??$construct@PEAUCordRep@cord_internal@absl@@AEBQEAU123@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@12@PEAPEAUCordRep@cord_internal@absl@@AEBQEAU456@@Z
+    ??$construct@PEAUCordRep@cord_internal@absl@@PEAU123@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@12@PEAPEAUCordRep@cord_internal@absl@@$$QEAPEAU456@@Z
+    ??$construct@PEAVCordzHandle@cord_internal@absl@@AEBQEAV123@XX@?$allocator_traits@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@PEAPEAVCordzHandle@cord_internal@absl@@AEBQEAV456@@Z
+    ??$construct@PEAVLogSink@absl@@AEBQEAV12@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVLogSink@absl@@@12@PEAPEAVLogSink@absl@@AEBQEAV45@@Z
+    ??$construct@PEAVLogSink@absl@@PEAV12@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVLogSink@absl@@@12@PEAPEAVLogSink@absl@@$$QEAPEAV45@@Z
+    ??$construct@PEBVCordzHandle@cord_internal@absl@@AEBQEBV123@XX@?$allocator_traits@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@PEAPEBVCordzHandle@cord_internal@absl@@AEBQEBV456@@Z
+    ??$construct@PEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEBV12345@XX@?$allocator_traits@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEBV45678@@Z
+    ??$construct@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@AEBUpiecewise_construct_t@23@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@PEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@AEBUpiecewise_construct_t@12@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QEAV?$tuple@$$V@12@@Z
+    ??$construct@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$$QEAU4567@@Z
+    ??$construct@UPayload@status_internal@absl@@AEBU123@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UPayload@status_internal@absl@@@12@PEAUPayload@status_internal@absl@@AEBU456@@Z
+    ??$construct@UPayload@status_internal@absl@@U123@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UPayload@status_internal@absl@@@12@PEAUPayload@status_internal@absl@@$$QEAU456@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@$$VXX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@AEBU1234@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@AEBU4567@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@$$QEAU4567@@Z
+    ??$construct@UTransitionType@cctz@time_internal@absl@@$$VXX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$construct@UTransitionType@cctz@time_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PEAUTransitionType@cctz@time_internal@absl@@$$QEAU4567@@Z
+    ??$construct@UViableSubstitution@strings_internal@absl@@AEAVstring_view@3@AEBV43@AEA_KXX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@PEAUViableSubstitution@strings_internal@absl@@AEAVstring_view@6@AEBV76@AEA_K@Z
+    ??$construct@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$construct_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEAPEBV12345@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@AEBQEAPEBV23456@@Z
+    ??$construct_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV12345@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@$$QEAPEAPEBV23456@@Z
+    ??$construct_at@PEAUCordRep@cord_internal@absl@@AEBQEAU123@PEAPEAU123@@Cr@std@@YAPEAPEAUCordRep@cord_internal@absl@@PEAPEAU234@AEBQEAU234@@Z
+    ??$construct_at@PEAUCordRep@cord_internal@absl@@PEAU123@PEAPEAU123@@Cr@std@@YAPEAPEAUCordRep@cord_internal@absl@@PEAPEAU234@$$QEAPEAU234@@Z
+    ??$construct_at@PEAVCordzHandle@cord_internal@absl@@AEBQEAV123@PEAPEAV123@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@AEBQEAV234@@Z
+    ??$construct_at@PEAVLogSink@absl@@AEBQEAV12@PEAPEAV12@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@AEBQEAV23@@Z
+    ??$construct_at@PEAVLogSink@absl@@PEAV12@PEAPEAV12@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@$$QEAPEAV23@@Z
+    ??$construct_at@PEBVCordzHandle@cord_internal@absl@@AEBQEBV123@PEAPEBV123@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@AEBQEBV234@@Z
+    ??$construct_at@PEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEBV12345@PEAPEBV12345@@Cr@std@@YAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV23456@AEBQEBV23456@@Z
+    ??$construct_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@AEBUpiecewise_construct_t@23@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@PEAU123@@Cr@std@@YAPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEAU201@AEBUpiecewise_construct_t@01@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@01@$$QEAV?$tuple@$$V@01@@Z
+    ??$construct_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U1234@PEAU1234@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@$$QEAU2345@@Z
+    ??$construct_at@UPayload@status_internal@absl@@AEBU123@PEAU123@@Cr@std@@YAPEAUPayload@status_internal@absl@@PEAU234@AEBU234@@Z
+    ??$construct_at@UPayload@status_internal@absl@@U123@PEAU123@@Cr@std@@YAPEAUPayload@status_internal@absl@@PEAU234@$$QEAU234@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@$$VPEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@AEBU1234@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@AEBU2345@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@U1234@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@$$QEAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@$$VPEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@U1234@PEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@$$QEAU2345@@Z
+    ??$construct_at@UViableSubstitution@strings_internal@absl@@AEAVstring_view@3@AEBV43@AEA_KPEAU123@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@AEAVstring_view@4@AEBV54@AEA_K@Z
+    ??$copy@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEBV234@0PEAV234@@Z
+    ??$countl_zero@_K@absl@@YAH_K@Z
+    ??$countr_zero@_K@absl@@YAH_K@Z
+    ??$destroy@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$destroy@PEAUCordRep@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@12@PEAPEAUCordRep@cord_internal@absl@@@Z
+    ??$destroy@PEAVCordzHandle@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@PEAPEAVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy@PEAVLogSink@absl@@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVLogSink@absl@@@12@PEAPEAVLogSink@absl@@@Z
+    ??$destroy@PEBVCordzHandle@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@PEAPEBVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@PEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$destroy@UConversionItem@ParsedFormatBase@str_format_internal@absl@@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$destroy@UPayload@status_internal@absl@@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UPayload@status_internal@absl@@@12@PEAUPayload@status_internal@absl@@@Z
+    ??$destroy@UTransition@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@@Z
+    ??$destroy@UTransitionType@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$destroy@UViableSubstitution@strings_internal@absl@@XX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@PEAUViableSubstitution@strings_internal@absl@@@Z
+    ??$destroy@VFormatArgImpl@str_format_internal@absl@@XX@?$allocator_traits@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@12@PEAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$destroy_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$destroy_at@PEAUCordRep@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAUCordRep@cord_internal@absl@@@Z
+    ??$destroy_at@PEAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy_at@PEAVLogSink@absl@@$0A@@Cr@std@@YAXPEAPEAVLogSink@absl@@@Z
+    ??$destroy_at@PEBVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEBVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$destroy_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPEAUPayload@status_internal@absl@@@Z
+    ??$destroy_at@UTransition@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransition@cctz@time_internal@absl@@@Z
+    ??$destroy_at@UTransitionType@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$destroy_at@UViableSubstitution@strings_internal@absl@@$0A@@Cr@std@@YAXPEAUViableSubstitution@strings_internal@absl@@@Z
+    ??$destroy_at@VFormatArgImpl@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$distance@PEBUPayload@status_internal@absl@@@Cr@std@@YA_JPEBUPayload@status_internal@absl@@0@Z
+    ??$distance@PEBUTransition@cctz@time_internal@absl@@@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SA_JPEBUTransition@cctz@time_internal@absl@@0@Z
+    ??$distance@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YA_JPEBUTransition@cctz@time_internal@absl@@0@Z
+    ??$distance@PEBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YA_JPEBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$distance@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@0@Z
+    ??$distance@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@01@0@Z
+    ??$distance@V?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@0@Z
+    ??$emplace@$$V@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA?AV?$__wrap_iter@PEAUTransition@cctz@time_internal@absl@@@12@V?$__wrap_iter@PEBUTransition@cctz@time_internal@absl@@@12@@Z
+    ??$emplace@$$V@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA?AV?$__wrap_iter@PEAUTransitionType@cctz@time_internal@absl@@@12@V?$__wrap_iter@PEBUTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$emplace_back@$$V@?$__split_buffer@UTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ??$emplace_back@$$V@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ??$emplace_back@AEAVstring_view@absl@@AEBV12@AEA_K@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAUViableSubstitution@strings_internal@absl@@AEAVstring_view@5@AEBV65@AEA_K@Z
+    ??$emplace_back@AEBQEAUCordRep@cord_internal@absl@@@?$InlinedVector@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEAAAEAPEAUCordRep@cord_internal@1@AEBQEAU231@@Z
+    ??$emplace_back@AEBQEAVLogSink@absl@@@?$InlinedVector@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@QEAAAEAPEAVLogSink@1@AEBQEAV21@@Z
+    ??$emplace_back@UPayload@status_internal@absl@@@?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAAAEAUPayload@status_internal@1@$$QEAU231@@Z
+    ??$exchange@_JH@absl@@YA_JAEA_J$$QEAH@Z
+    ??$find@V?$__wrap_iter@PEAPEAVLogSink@absl@@@Cr@std@@PEAVLogSink@absl@@@Cr@std@@YA?AV?$__wrap_iter@PEAPEAVLogSink@absl@@@01@V201@0AEBQEAVLogSink@absl@@@Z
+    ??$find@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QEAA?AV?$__hash_iterator@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@@Z
+    ??$find_first_non_full@X@container_internal@absl@@YA?AUFindInfo@01@PEBW4ctrl_t@01@_K1@Z
+    ??$forward@$$T@absl@@YA$$QEA$$TAEA$$T@Z
+    ??$forward@AEAI@absl@@YAAEAIAEAI@Z
+    ??$forward@AEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@YAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@AEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@YAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@AEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@AEA_K@absl@@YAAEA_KAEA_K@Z
+    ??$forward@AEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YAAEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AEBV123@@Z
+    ??$forward@AEBVCord@absl@@@absl@@YAAEBVCord@0@AEBV10@@Z
+    ??$forward@H@absl@@YA$$QEAHAEAH@Z
+    ??$forward@I@absl@@YA$$QEAIAEAI@Z
+    ??$forward@V?$allocator@H@Cr@std@@@absl@@YA$$QEAV?$allocator@H@Cr@std@@AEAV123@@Z
+    ??$forward@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@YA$$QEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@YA$$QEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YA$$QEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@_K@absl@@YA$$QEA_KAEA_K@Z
+    ??$get@$00@?$CompressedTuple@V?$allocator@H@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@H@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@PEAPEAUCordRep@cord_internal@absl@@@container_internal@absl@@QEGAAAEAPEAPEAUCordRep@cord_internal@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@PEAPEAVLogSink@absl@@@container_internal@absl@@QEGAAAEAPEAPEAVLogSink@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PEAUPayload@status_internal@absl@@@container_internal@absl@@QEGAAAEAPEAUPayload@status_internal@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00AEBVstring_view@absl@@AEBH@Cr@std@@YAAEBHAEBV?$tuple@AEBVstring_view@absl@@AEBH@01@@Z
+    ??$get@$00Vstring_view@absl@@V12@@Cr@std@@YAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@01@@Z
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@H@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@H@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@PEAPEAUCordRep@cord_internal@absl@@@container_internal@absl@@QEGAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@PEAPEAVLogSink@absl@@@container_internal@absl@@QEGAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PEAUPayload@status_internal@absl@@@container_internal@absl@@QEGAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@AEBVstring_view@absl@@AEBH@Cr@std@@YAAEBVstring_view@absl@@AEBV?$tuple@AEBVstring_view@absl@@AEBH@01@@Z
+    ??$get@$0A@Vstring_view@absl@@V12@@Cr@std@@YAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@01@@Z
+    ??$get@Vstring_view@absl@@V12@@?$__get_pair@$00@Cr@std@@SAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@12@@Z
+    ??$get@Vstring_view@absl@@V12@@?$__get_pair@$0A@@Cr@std@@SAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@12@@Z
+    ??$hash@V?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@$0A@@MixingHashState@hash_internal@absl@@SA_KAEBV?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@@Z
+    ??$hash_bytes@VMixingHashState@hash_internal@absl@@H@hash_internal@absl@@YA?AVMixingHashState@01@V201@AEBH@Z
+    ??$hash_bytes@VMixingHashState@hash_internal@absl@@_K@hash_internal@absl@@YA?AVMixingHashState@01@V201@AEB_K@Z
+    ??$hash_range_or_bytes@VMixingHashState@hash_internal@absl@@D@hash_internal@absl@@YA?AVMixingHashState@01@V201@PEBD_K@Z
+    ??$hash_tuple@VMixingHashState@hash_internal@absl@@V?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@$0A@$00@hash_internal@absl@@YA?AVMixingHashState@01@V201@AEBV?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@U?$integer_sequence@_K$0A@$00@1@@Z
+    ??$launder@$$CBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEBU201@@Z
+    ??$launder@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEAU201@@Z
+    ??$lower_bound@PEBUTransition@cctz@time_internal@absl@@U1234@UByUnixTime@1234@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@UByUnixTime@2345@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@Cr@std@@YA?AU?$pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@01@$$QEAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@@Cr@std@@YA?AU?$pair@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@@01@$$QEAPEAPEAVCordzHandle@cord_internal@absl@@0@Z
+    ??$make_pair@PEAPEAVLogSink@absl@@PEAPEAV12@@Cr@std@@YA?AU?$pair@PEAPEAVLogSink@absl@@PEAPEAV12@@01@$$QEAPEAPEAVLogSink@absl@@0@Z
+    ??$make_pair@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@@Cr@std@@YA?AU?$pair@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@@01@$$QEAPEAPEBVCordzHandle@cord_internal@absl@@0@Z
+    ??$make_pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@@Cr@std@@YA?AU?$pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@@01@$$QEAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@0@Z
+    ??$make_pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YA?AU?$pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@01@$$QEAPEAUTransition@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YA?AU?$pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@01@$$QEAPEAUTransitionType@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PEAUViableSubstitution@strings_internal@absl@@PEAU123@@Cr@std@@YA?AU?$pair@PEAUViableSubstitution@strings_internal@absl@@PEAU123@@01@$$QEAPEAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$make_pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@Cr@std@@YA?AU?$pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@01@$$QEAPEBVFormatArgImpl@str_format_internal@absl@@$$QEAPEAV345@@Z
+    ??$make_pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@0@Z
+    ??$make_unique@ULogMessageData@LogMessage@log_internal@absl@@AEAPEBDAEAHAEAW4LogSeverity@4@VTime@4@@Cr@std@@YA?AV?$unique_ptr@ULogMessageData@LogMessage@log_internal@absl@@U?$default_delete@ULogMessageData@LogMessage@log_internal@absl@@@Cr@std@@@01@AEAPEBDAEAHAEAW4LogSeverity@absl@@$$QEAVTime@4@@Z
+    ??$make_unique@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@$$V@Cr@std@@YA?AV?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@01@XZ
+    ??$make_unique@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@AEAV12@@Cr@std@@YA?AV?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@01@AEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Z
+    ??$max@VDuration@absl@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0@Z
+    ??$max@VDuration@absl@@U?$__less@VDuration@absl@@V12@@Cr@std@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0U?$__less@VDuration@absl@@V12@@01@@Z
+    ??$max_size@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@12@@Z
+    ??$max_size@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAUCordRep@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEAVLogSink@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAVLogSink@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@@Z
+    ??$max_size@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UPayload@status_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UViableSubstitution@strings_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@VFormatArgImpl@str_format_internal@absl@@@12@@Z
+    ??$min@VDuration@absl@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0@Z
+    ??$min@VDuration@absl@@U?$__less@VDuration@absl@@V12@@Cr@std@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0U?$__less@VDuration@absl@@V12@@01@@Z
+    ??$move@AEA_J@absl@@YA$$QEA_JAEA_J@Z
+    ??$move@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$move@PEAPEAVLogSink@absl@@PEAPEAV12@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@00@Z
+    ??$move@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$move@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$move@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@V201@00@Z
+    ??$move_backward@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$move_backward@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$move_backward@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$next@AEAPEBUTransition@cctz@time_internal@absl@@@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAPEBUTransition@cctz@time_internal@absl@@AEAPEBU3456@_J@Z
+    ??$next@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@_J@Z
+    ??$reset@PEAPEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@?$unique_ptr@$$BY0A@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@23@@Cr@std@@QEAAXPEAPEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@@Z
+    ??$rotl@_K@absl@@YA_K_KH@Z
+    ??$swap@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@0@Z
+    ??$swap@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAXAEAPEAPEAVCordzHandle@cord_internal@absl@@0@Z
+    ??$swap@PEAPEAVLogSink@absl@@@Cr@std@@YAXAEAPEAPEAVLogSink@absl@@0@Z
+    ??$swap@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@YAXAEAPEAPEBVCordzHandle@cord_internal@absl@@0@Z
+    ??$swap@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@YAXAEAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@0@Z
+    ??$swap@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEAUTransition@cctz@time_internal@absl@@0@Z
+    ??$swap@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEAUTransitionType@cctz@time_internal@absl@@0@Z
+    ??$swap@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@YAXAEAPEAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$swap@PEBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@YAXAEAPEBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@0@Z
+    ??$swap@UViableSubstitution@strings_internal@absl@@@Cr@std@@YAXAEAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$swap@Vstring_view@absl@@@Cr@std@@YAXAEAVstring_view@absl@@0@Z
+    ??$tie@$$CBVstring_view@absl@@$$CBH@Cr@std@@YA?AV?$tuple@AEBVstring_view@absl@@AEBH@01@AEBVstring_view@absl@@AEBH@Z
+    ??$upper_bound@PEBUTransition@cctz@time_internal@absl@@U1234@UByCivilTime@1234@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@UByCivilTime@2345@@Z
+    ??$upper_bound@PEBUTransition@cctz@time_internal@absl@@U1234@UByUnixTime@1234@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@UByUnixTime@2345@@Z
+    ??0?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Z
+    ??0?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@Z
+    ??0?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QEAA@Vstring_view@2@@Z
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QEAA@XZ
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QEAA@_K@Z
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QEAA@Vstring_view@2@@Z
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QEAA@XZ
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QEAA@_K@Z
+    ??0?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@absl@@QEAA@PEBD@Z
+    ??0?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@absl@@QEAA@PEBD@Z
+    ??0?$InlinedVector@H$0CP@V?$allocator@H@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAA@AEBV01@@Z
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAA@AEBV01@AEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$IteratorValueAdapter@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@V?$move_iterator@PEAPEAUCordRep@cord_internal@absl@@@23@@inlined_vector_internal@absl@@QEAA@AEBV?$move_iterator@PEAPEAUCordRep@cord_internal@absl@@@Cr@std@@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$move_iterator@PEAPEAVLogSink@absl@@@23@@inlined_vector_internal@absl@@QEAA@AEBV?$move_iterator@PEAPEAVLogSink@absl@@@Cr@std@@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PEBUPayload@status_internal@absl@@@inlined_vector_internal@absl@@QEAA@AEBQEBUPayload@status_internal@2@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@V?$move_iterator@PEAUPayload@status_internal@absl@@@23@@inlined_vector_internal@absl@@QEAA@AEBV?$move_iterator@PEAUPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$Layout@_KPEAUCordRep@cord_internal@absl@@I@container_internal@absl@@QEAA@_K00@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$0A@$00$01@absl@@U45@@internal_layout@container_internal@absl@@QEAA@_K00@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$0A@$00@absl@@U?$integer_sequence@_K$0A@$00$01@5@@internal_layout@container_internal@absl@@QEAA@_K0@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$0A@@absl@@U?$integer_sequence@_K$0A@$00@5@@internal_layout@container_internal@absl@@QEAA@_K@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$S@absl@@U?$integer_sequence@_K$0A@@5@@internal_layout@container_internal@absl@@QEAA@XZ
+    ??0?$NonIterableBitMask@_K$07$02@container_internal@absl@@QEAA@_K@Z
+    ??0?$RandenPool@E@random_internal@absl@@QEAA@XZ
+    ??0?$RandenPool@G@random_internal@absl@@QEAA@XZ
+    ??0?$RandenPool@I@random_internal@absl@@QEAA@XZ
+    ??0?$RandenPool@_K@random_internal@absl@@QEAA@XZ
+    ??0?$Sample@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAA@XZ
+    ??0?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAA@XZ
+    ??0?$Span@$$CBD@absl@@QEAA@PEBD_K@Z
+    ??0?$Span@$$CBD@absl@@QEAA@XZ
+    ??0?$Span@$$CBI@absl@@QEAA@PEBI_K@Z
+    ??0?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@PEBVFormatArgImpl@str_format_internal@1@_K@Z
+    ??0?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@XZ
+    ??0?$Span@D@absl@@QEAA@PEAD_K@Z
+    ??0?$Span@D@absl@@QEAA@XZ
+    ??0?$Span@I@absl@@QEAA@PEAI_K@Z
+    ??0?$Span@PEAVLogSink@absl@@@absl@@QEAA@PEAPEAVLogSink@1@_K@Z
+    ??0?$Span@QEAUCordRep@cord_internal@absl@@@absl@@QEAA@PEBQEAUCordRep@cord_internal@1@_K@Z
+    ??0?$Span@QEAX@absl@@QEAA@PEBQEAX_K@Z
+    ??0?$Span@VFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@PEAVFormatArgImpl@str_format_internal@1@_K@Z
+    ??0?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$__allocator_destructor@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@AEAV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@_K@Z
+    ??0?$__atomic_base@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z$0A@@Cr@std@@QEAA@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z@Z
+    ??0?$__atomic_base@PEAUHashtablezInfo@container_internal@absl@@$0A@@Cr@std@@QEAA@PEAUHashtablezInfo@container_internal@absl@@@Z
+    ??0?$__atomic_base@PEAVCordzInfo@cord_internal@absl@@$0A@@Cr@std@@QEAA@PEAVCordzInfo@cord_internal@absl@@@Z
+    ??0?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEAA@XZ
+    ??0?$__compressed_pair_elem@PEAPEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
+    ??0?$__compressed_pair_elem@PEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
+    ??0?$__compressed_pair_elem@PEAVZoneInfoSource@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
+    ??0?$__compressed_pair_elem@U?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
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+    ?GetAllocatedData@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetAllocatedData@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAVLogSink@3@XZ
+    ?GetAllocatedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAUPayload@status_internal@3@XZ
+    ?GetAllocatedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAPEBUPayload@status_internal@3@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@H@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAppendBuffer@CordRepBtree@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
+    ?GetAppendBuffer@CordRepRing@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
+    ?GetAppendBufferSlow@CordRepBtree@cord_internal@absl@@AEAA?AV?$Span@D@3@_K@Z
+    ?GetAppendBufferSlowPath@Cord@absl@@AEAA?AVCordBuffer@2@_K00@Z
+    ?GetCachedTID@base_internal@absl@@YAIXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetCharacter@CordRepBtree@cord_internal@absl@@QEBAD_K@Z
+    ?GetCharacter@CordRepRing@cord_internal@absl@@QEBAD_K@Z
+    ?GetCond@WinHelper@Waiter@synchronization_internal@absl@@SAPEAU_RTL_CONDITION_VARIABLE@@PEAV234@@Z
+    ?GetCordzStatistics@CordzInfo@cord_internal@absl@@QEBA?AUCordzStatistics@23@XZ
+    ?GetCurrentTimeNanos@absl@@YA_JXZ
+    ?GetData@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetData@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAPEAVLogSink@3@XZ
+    ?GetData@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAUPayload@status_internal@3@XZ
+    ?GetDebugStackTraceHook@debugging_internal@absl@@YAP6AXQEBQEAXHP6AXPEBDPEAX@Z2@ZXZ
+    ?GetEstimatedFairShareMemoryUsage@cord_internal@absl@@YA_KPEBUCordRep@12@@Z
+    ?GetEstimatedMemoryUsage@cord_internal@absl@@YA_KPEBUCordRep@12@@Z
+    ?GetFirstChunk@Cord@absl@@CA?AVstring_view@2@AEBV12@@Z
+    ?GetFirstChunk@Cord@absl@@CA?AVstring_view@2@V32@@Z
+    ?GetFlatAux@Cord@absl@@CA_NPEAUCordRep@cord_internal@2@PEAVstring_view@2@@Z
+    ?GetHashtablezMaxSamples@container_internal@absl@@YA_KXZ
+    ?GetHashtablezSampleParameter@container_internal@absl@@YAHXZ
+    ?GetId@GraphCycles@synchronization_internal@absl@@QEAA?AUGraphId@23@PEAX@Z
+    ?GetInlinedCapacity@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetInlinedCapacity@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetInlinedCapacity@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetInlinedData@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAHXZ
+    ?GetInlinedData@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetInlinedData@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetInlinedData@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAVLogSink@3@XZ
+    ?GetInlinedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAUPayload@status_internal@3@XZ
+    ?GetInlinedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAPEBUPayload@status_internal@3@XZ
+    ?GetIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetKeys@RandenHwAes@random_internal@absl@@SAPEBXXZ
+    ?GetKeys@RandenSlow@random_internal@absl@@SAPEBXXZ
+    ?GetLeafData@CordRepRing@cord_internal@absl@@SAPEBDPEBUCordRep@23@@Z
+    ?GetLock@WinHelper@Waiter@synchronization_internal@absl@@SAPEAU_RTL_SRWLOCK@@PEAV234@@Z
+    ?GetMaxSamples@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEBA_KXZ
+    ?GetOrCreateCurrentThreadIdentity@synchronization_internal@absl@@YAPEAUThreadIdentity@base_internal@2@XZ
+    ?GetParentMethod@CordzInfo@cord_internal@absl@@CA?AW4MethodIdentifier@CordzUpdateTracker@23@PEBV123@@Z
+    ?GetParentStack@CordzInfo@cord_internal@absl@@QEBA?AV?$Span@QEAX@3@XZ
+    ?GetPayload@Status@absl@@QEBA?AV?$optional@VCord@absl@@@2@Vstring_view@2@@Z
+    ?GetPayloads@Status@absl@@AEAAPEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@2@XZ
+    ?GetPayloads@Status@absl@@AEBAPEBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@2@XZ
+    ?GetPrependBuffer@CordRepRing@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
+    ?GetProgramCounter@debugging_internal@absl@@YAPEAXQEAX@Z
+    ?GetRepData@CordRepRing@cord_internal@absl@@SAPEBDPEBUCordRep@23@@Z
+    ?GetRepHi@time_internal@absl@@YA_JVDuration@2@@Z
+    ?GetRepLo@time_internal@absl@@YAIVDuration@2@@Z
+    ?GetSaltMaterial@random_internal@absl@@YA?AV?$optional@I@2@XZ
+    ?GetSize@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSkipCount@ExponentialBiased@profiling_internal@absl@@QEAA_J_J@Z
+    ?GetStack@CordzInfo@cord_internal@absl@@QEBA?AV?$Span@QEAX@3@XZ
+    ?GetStackFrames@absl@@YAHPEAPEAXPEAHHH@Z
+    ?GetStackFramesWithContext@absl@@YAHPEAPEAXPEAHHHPEBX1@Z
+    ?GetStackTrace@GraphCycles@synchronization_internal@absl@@QEAAHUGraphId@23@PEAPEAPEAX@Z
+    ?GetStackTrace@absl@@YAHPEAPEAXHH@Z
+    ?GetStackTraceWithContext@absl@@YAHPEAPEAXHHPEBXPEAH@Z
+    ?GetStatusPayloadPrinter@status_internal@absl@@YAP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@AEBVCord@2@@ZXZ
+    ?GetStride@ExponentialBiased@profiling_internal@absl@@QEAA_J_J@Z
+    ?GetTID@base_internal@absl@@YAIXZ
+    ?GetTagForChar@str_format_internal@absl@@YA?AVConvTag@12@D@Z
+    ?GetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAPEAU?$atomic@H@Cr@std@@XZ
+    ?GetTransitionType@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NH_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAE@Z
+    ?GetWaiter@Waiter@synchronization_internal@absl@@SAPEAV123@PEAUThreadIdentity@base_internal@3@@Z
+    ?GetWeekday@absl@@YA?AW4weekday@detail@cctz@time_internal@1@V?$civil_time@Usecond_tag@time_internal@absl@@@3451@@Z
+    ?GetWord@?$BigUnsigned@$03@strings_internal@absl@@QEBAIH@Z
+    ?GetWord@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAIH@Z
+    ?GetYearDay@absl@@YAHV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?GlobalHashtablezSampler@container_internal@absl@@YAAEAV?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@2@XZ
+    ?GuaranteedEqual@Condition@absl@@SA_NPEBV12@0@Z
+    ?Guard@?$NullGuard@C@log_internal@absl@@SAAEBCAEBC@Z
+    ?Guard@?$NullGuard@D@log_internal@absl@@SAAEBDAEBD@Z
+    ?Guard@?$NullGuard@E@log_internal@absl@@SAAEBEAEBE@Z
+    ?Guard@?$NullGuard@F@log_internal@absl@@SAAEBFAEBF@Z
+    ?Guard@?$NullGuard@G@log_internal@absl@@SAAEBGAEBG@Z
+    ?Guard@?$NullGuard@H@log_internal@absl@@SAAEBHAEBH@Z
+    ?Guard@?$NullGuard@I@log_internal@absl@@SAAEBIAEBI@Z
+    ?Guard@?$NullGuard@J@log_internal@absl@@SAAEBJAEBJ@Z
+    ?Guard@?$NullGuard@K@log_internal@absl@@SAAEBKAEBK@Z
+    ?Guard@?$NullGuard@M@log_internal@absl@@SAAEBMAEBM@Z
+    ?Guard@?$NullGuard@N@log_internal@absl@@SAAEBNAEBN@Z
+    ?Guard@?$NullGuard@PEAX@log_internal@absl@@SAAEBQEAXAEBQEAX@Z
+    ?Guard@?$NullGuard@PEBX@log_internal@absl@@SAAEBQEBXAEBQEBX@Z
+    ?Guard@?$NullGuard@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@log_internal@absl@@SAAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBV456@@Z
+    ?Guard@?$NullGuard@Vstring_view@absl@@@log_internal@absl@@SAAEBVstring_view@3@AEBV43@@Z
+    ?Guard@?$NullGuard@_J@log_internal@absl@@SAAEB_JAEB_J@Z
+    ?Guard@?$NullGuard@_K@log_internal@absl@@SAAEB_KAEB_K@Z
+    ?Guard@?$NullGuard@_N@log_internal@absl@@SAAEB_NAEB_N@Z
+    ?H1@container_internal@absl@@YA_K_KPEBW4ctrl_t@12@@Z
+    ?HandleInvalidStatusCtorArg@Helper@internal_statusor@absl@@SAXPEAVStatus@3@@Z
+    ?HasBeenNotifiedInternal@Notification@absl@@CA_NPEBU?$atomic@_N@Cr@std@@@Z
+    ?HasEdge@GraphCycles@synchronization_internal@absl@@QEBA_NUGraphId@23@0@Z
+    ?HasNode@GraphCycles@synchronization_internal@absl@@QEAA_NUGraphId@23@@Z
+    ?HasRandenHwAesImplementation@random_internal@absl@@YA_NXZ
+    ?Head@CordzInfo@cord_internal@absl@@SAPEAV123@AEBVCordzSnapshot@23@@Z
+    ?HexStringToBytes@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?HideMask@base_internal@absl@@YA_KXZ
+    ?HighestBitSet@?$NonIterableBitMask@_K$07$02@container_internal@absl@@QEBAIXZ
+    ?IDivDuration@absl@@YA_JVDuration@1@0PEAV21@@Z
+    ?IDivDuration@time_internal@absl@@YA_J_NVDuration@2@1PEAV32@@Z
+    ?In@Time@absl@@QEBA?AUBreakdown@12@VTimeZone@2@@Z
+    ?InMillisecondsFromNow@KernelTimeout@synchronization_internal@absl@@AEBAKXZ
+    ?Increment@RefcountAndFlags@cord_internal@absl@@QEAAXXZ
+    ?IncrementSynchSem@Mutex@absl@@CAXPEAV12@PEAUPerThreadSynch@base_internal@2@@Z
+    ?IndexBefore@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@U4123@_K@Z
+    ?IndexBeyond@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@_K@Z
+    ?IndexOf@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@_K@Z
+    ?IndexOfLength@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@_K@Z
+    ?InfiniteDuration@absl@@YA?AVDuration@1@XZ
+    ?InfiniteFuture@absl@@YA?AVTime@1@XZ
+    ?InfinitePast@absl@@YA?AVTime@1@XZ
+    ?Init@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@PEAVCordRepBtree@23@@Z
+    ?Init@PerThreadSem@synchronization_internal@absl@@CAXPEAUThreadIdentity@base_internal@3@@Z
+    ?InitDiscreteDistribution@random_internal@absl@@YA?AV?$vector@U?$pair@N_K@Cr@std@@V?$allocator@U?$pair@N_K@Cr@std@@@23@@Cr@std@@PEAV?$vector@NV?$allocator@N@Cr@std@@@45@@Z
+    ?InitFirst@CordRepBtreeNavigator@cord_internal@absl@@QEAAPEAUCordRep@23@PEAVCordRepBtree@23@@Z
+    ?InitFrom@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXAEBV123@@Z
+    ?InitInstance@CordRepBtree@cord_internal@absl@@AEAAXH_K0@Z
+    ?InitTree@ChunkIterator@Cord@absl@@AEAAXPEAUCordRep@cord_internal@3@@Z
+    ?InitWhat@BadStatusOrAccess@absl@@AEBAXXZ
+    ?Initialize@ExponentialBiased@profiling_internal@absl@@AEAAXXZ
+    ?Initialize@LogEntryStreambuf@log_internal@absl@@AEAAXXZ
+    ?InitializeCordRepExternal@cord_internal@absl@@YAXVstring_view@2@PEAUCordRepExternal@12@@Z
+    ?InitializeSymbolizer@absl@@YAXPEBD@Z
+    ?InlinedRepToCode@Status@absl@@CA?AW4StatusCode@2@_K@Z
+    ?InsertEdge@GraphCycles@synchronization_internal@absl@@QEAA_NUGraphId@23@0@Z
+    ?InstallFailureSignalHandler@absl@@YAXAEBUFailureSignalHandlerOptions@1@@Z
+    ?Int128High64@absl@@YA_JVint128@1@@Z
+    ?Int128Low64@absl@@YA_KVint128@1@@Z
+    ?Int128Max@absl@@YA?AVint128@1@XZ
+    ?Int128Min@absl@@YA?AVint128@1@XZ
+    ?InternalAttemptToUseMutexInFatalSignalHandler@Mutex@absl@@SAXXZ
+    ?InternalCondVarPoke@Waiter@synchronization_internal@absl@@AEAAXXZ
+    ?InternalError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InternalStream@LogMessage@log_internal@absl@@QEAAAEAV123@XZ
+    ?InvalidArgumentError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InvalidGraphId@synchronization_internal@absl@@YA?AUGraphId@12@XZ
+    ?IsAborted@absl@@YA_NAEBVStatus@1@@Z
+    ?IsAlreadyExists@absl@@YA_NAEBVStatus@1@@Z
+    ?IsBtree@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsCancelled@absl@@YA_NAEBVStatus@1@@Z
+    ?IsCooperative@SpinLock@base_internal@absl@@CA_NW4SchedulingMode@23@@Z
+    ?IsCrc@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsDataEdge@cord_internal@absl@@YA_NPEBUCordRep@12@@Z
+    ?IsDataLoss@absl@@YA_NAEBVStatus@1@@Z
+    ?IsDeadlineExceeded@absl@@YA_NAEBVStatus@1@@Z
+    ?IsEmpty@Queue@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?IsExternal@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsFailedPrecondition@absl@@YA_NAEBVStatus@1@@Z
+    ?IsFatal@LogMessage@log_internal@absl@@AEBA_NXZ
+    ?IsFlat@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsFlat@CordRepBtree@cord_internal@absl@@QEBA_NPEAVstring_view@3@@Z
+    ?IsFlat@CordRepBtree@cord_internal@absl@@QEBA_N_K0PEAVstring_view@3@@Z
+    ?IsHashtablezEnabled@container_internal@absl@@YA_NXZ
+    ?IsImmortal@RefcountAndFlags@cord_internal@absl@@QEBA_NXZ
+    ?IsInfiniteDuration@time_internal@absl@@YA_NVDuration@2@@Z
+    ?IsInitialized@log_internal@absl@@YA_NXZ
+    ?IsInlined@Status@absl@@CA_N_K@Z
+    ?IsInternal@absl@@YA_NAEBVStatus@1@@Z
+    ?IsInvalidArgument@absl@@YA_NAEBVStatus@1@@Z
+    ?IsMovedFrom@Status@absl@@CA_N_K@Z
+    ?IsNotFound@absl@@YA_NAEBVStatus@1@@Z
+    ?IsOne@RefcountAndFlags@cord_internal@absl@@QEAA_NXZ
+    ?IsOutOfRange@absl@@YA_NAEBVStatus@1@@Z
+    ?IsPermissionDenied@absl@@YA_NAEBVStatus@1@@Z
+    ?IsPow2@CordBuffer@absl@@CA_N_K@Z
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+    ?MaxFramesInLogStackTrace@log_internal@absl@@YAHXZ
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+    ?ReadDigits@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAHPEBD0H@Z
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+    ?ReaderTryLock@Mutex@absl@@QEAA_NXZ
+    ?ReaderUnlock@Mutex@absl@@QEAAXXZ
+    ?Rebuild@CordRepBtree@cord_internal@absl@@CAXPEAPEAV123@PEAV123@_N@Z
+    ?Rebuild@CordRepBtree@cord_internal@absl@@SAPEAV123@PEAV123@@Z
+    ?RecordInsertSlow@container_internal@absl@@YAXPEAUHashtablezInfo@12@_K1@Z
+    ?Ref@CordRep@cord_internal@absl@@SAPEAU123@PEAU123@@Z
+    ?Ref@Status@absl@@CAX_K@Z
+    ?RefCordRep@CordzInfo@cord_internal@absl@@QEBAPEAUCordRep@23@XZ
+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPEBDH000@Z@Z
+    ?RegisterCondVarTracer@absl@@YAXP6AXPEBDPEBX@Z@Z
+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQEBQEAXHP6AXPEBDPEAX@Z2@Z@Z
+    ?RegisterInternalLogFunction@raw_log_internal@absl@@YAXP6AXW4LogSeverity@2@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?RegisterLogFilterAndPrefixHook@raw_log_internal@absl@@YAXP6A_NW4LogSeverity@2@PEBDHPEAPEADPEAH@Z@Z
+    ?RegisterMutexProfiler@absl@@YAXP6AX_J@Z@Z
+    ?RegisterMutexTracer@absl@@YAXP6AXPEBDPEBX_J@Z@Z
+    ?RegisterSpinLockProfiler@base_internal@absl@@YAXP6AXPEBX_J@Z@Z
+    ?RegisterSymbolizer@absl@@YAXP6A_NPEBXPEADH@Z@Z
+    ?Release@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEHAA?AU?$Allocation@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@23@XZ
+    ?Release@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEHAA?AU?$Allocation@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@23@XZ
+    ?Release@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEHAA?AU?$Allocation@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@23@XZ
+    ?Release@ReleasableMutexLock@absl@@QEAAXXZ
+    ?Remove@CondVar@absl@@AEAAXPEAUPerThreadSynch@base_internal@2@@Z
+    ?RemoveChunkPrefix@ChunkIterator@Cord@absl@@AEAAX_K@Z
+    ?RemoveCrcNode@cord_internal@absl@@YAPEAUCordRep@12@PEAU312@@Z
+    ?RemoveEdge@GraphCycles@synchronization_internal@absl@@QEAAXUGraphId@23@0@Z
+    ?RemoveExtraAsciiWhitespace@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?RemoveLogSink@log_internal@absl@@YAXPEAVLogSink@2@@Z
+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QEAAXPEAX@Z
+    ?RemovePrefix@Cord@absl@@QEAAX_K@Z
+    ?RemovePrefix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?RemoveSuffix@Cord@absl@@QEAAX_K@Z
+    ?RemoveSuffix@CordRepBtree@cord_internal@absl@@SAPEAUCordRep@23@PEAV123@_K@Z
+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?RepToPointer@Status@absl@@CAPEAUStatusRep@status_internal@2@_K@Z
+    ?Reset@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAXXZ
+    ?Reset@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAXXZ
+    ?Reset@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAXXZ
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NAEBV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?ResetToEmpty@InlineRep@Cord@absl@@AEAAXXZ
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPEAUCordRep@12@V?$FunctionRef@$$A6AXPEAUCordRep@cord_internal@absl@@_K1@Z@2@@Z
+    ?RoundUp@cord_internal@absl@@YA_K_K0@Z
+    ?RoundUpForTag@cord_internal@absl@@YA_K_K@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?SampleSlow@container_internal@absl@@YAPEAUHashtablezInfo@12@AEAUSamplingState@12@_K@Z
+    ?Seek@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AEAAXXZ
+    ?SetAllocation@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXU?$Allocation@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@23@@Z
+    ?SetAllocation@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXU?$Allocation@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@23@@Z
+    ?SetAllocation@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXU?$Allocation@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@23@@Z
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QEAAX_K@Z
+    ?SetConversionChar@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXW4FormatConversionChar@3@PEAVFormatConversionSpecImpl@23@@Z
+    ?SetCordRep@CordzInfo@cord_internal@absl@@QEAAXPEAUCordRep@23@@Z
+    ?SetCordRep@CordzUpdateScope@cord_internal@absl@@QEBAXPEAUCordRep@23@@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPEAUThreadIdentity@12@P6AXPEAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QEAAXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IEAAXXZ
+    ?SetFlags@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXW4Flags@23@PEAVFormatConversionSpecImpl@23@@Z
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetInlinedSize@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SetIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXXZ
+    ?SetIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXXZ
+    ?SetIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXXZ
+    ?SetLength@CordBuffer@absl@@QEAAX_K@Z
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMaxSamples@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAAX_K@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QEAAXVstring_view@2@VCord@2@@Z
+    ?SetPrecision@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXHPEAVFormatConversionSpecImpl@23@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPEAPEAXPEAHHHPEBX1@Z@Z
+    ?SetStatusPayloadPrinter@status_internal@absl@@YAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@AEBVCord@2@@Z@Z
+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPEAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QEAAXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXXZ
+    ?SetTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@AEBVCordzUpdateScope@53@@Z
+    ?SetTreeOrEmpty@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@AEBVCordzUpdateScope@53@@Z
+    ?SetValue@?$Manager@D$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBD@Z
+    ?SetValue@?$Manager@H$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBH@Z
+    ?SetValue@?$Manager@I$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBI@Z
+    ?SetValue@?$Manager@Vstring_view@absl@@$0A@@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBVstring_view@4@@Z
+    ?SetValue@?$Manager@_J$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEB_J@Z
+    ?SetWidth@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXHPEAVFormatConversionSpecImpl@23@@Z
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?ShouldInsertBackwards@container_internal@absl@@YA_N_KPEBW4ctrl_t@12@@Z
+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QEAA_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QEAA_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QEAAXXZ
+    ?SignalAll@CondVar@absl@@QEAAXXZ
+    ?SignedAddResult@int128_internal@absl@@YA?AVint128@2@V32@0@Z
+    ?SignedSubstructResult@int128_internal@absl@@YA?AVint128@2@V32@00@Z
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PEA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PEAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PEAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YA_KNPEAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?SkipCrcNode@cord_internal@absl@@YAPEAUCordRep@12@PEAU312@@Z
+    ?SkipCrcNode@cord_internal@absl@@YAPEBUCordRep@12@PEBU312@@Z
+    ?SleepFor@absl@@YAXVDuration@1@@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AEAAXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AEAAXI@Z
+    ?SnprintF@str_format_internal@absl@@YAHPEAD_KVUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SpinLockDelay@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@IHW4SchedulingMode@12@@Z
+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPEAU?$atomic@I@Cr@std@@HQEBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
+    ?SpinLockWake@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@_N@Z
+    ?SpinLoop@SpinLock@base_internal@absl@@AEAAIXZ
+    ?StackTraceWorksForTest@debugging_internal@absl@@YA_NXZ
+    ?StartsWith@absl@@YA_NVstring_view@1@0@Z
+    ?StartsWithIgnoreCase@absl@@YA_NVstring_view@1@0@Z
+    ?StatusCodeToString@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusCode@1@@Z
+    ?StderrThreshold@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?Store64@little_endian@absl@@YAXPEAX_K@Z
+    ?Store@?$AtomicHook@P6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@absl@@Vstring_view@2@AEBVCord@2@@Z@base_internal@absl@@QEAAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@3@Vstring_view@3@AEBVCord@3@@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBDH000@Z@base_internal@absl@@QEAAXP6AXPEBDH000@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBDPEBX@Z@base_internal@absl@@QEAAXP6AXPEBDPEBX@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBDPEBX_J@Z@base_internal@absl@@QEAAXP6AXPEBDPEBX_J@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBX_J@Z@base_internal@absl@@QEAAXP6AXPEBX_J@Z@Z
+    ?Store@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEAAXP6AXW4LogSeverity@3@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?Store@?$AtomicHook@P6AXXZ@base_internal@absl@@QEAAXP6AXXZ@Z
+    ?Store@?$AtomicHook@P6AX_J@Z@base_internal@absl@@QEAAXP6AX_J@Z@Z
+    ?Store@?$AtomicHook@P6A_NPEBXPEADH@Z@base_internal@absl@@QEAAXP6A_NPEBXPEADH@Z@Z
+    ?Store@?$AtomicHook@P6A_NW4LogSeverity@absl@@PEBDHPEAPEADPEAH@Z@base_internal@absl@@QEAAXP6A_NW4LogSeverity@3@PEBDHPEAPEADPEAH@Z@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@111@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@11@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@1@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@000@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@00@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@0@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@@Z
+    ?StrError@base_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@H@Z
+    ?StrReplaceAll@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ?StrReplaceAll@absl@@YAHV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@3@@Z
+    ?StripAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StripLeadingAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StripTrailingAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StrlenInternal@string_view@absl@@CA_KPEBD@Z
+    ?SubLength@CordRepRing@cord_internal@absl@@AEAAXI_K@Z
+    ?SubRing@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K11@Z
+    ?SubTree@CordRepBtree@cord_internal@absl@@QEAAPEAUCordRep@23@_K0@Z
+    ?Subcord@Cord@absl@@QEBA?AV12@_K0@Z
+    ?SubstituteAndAppendArray@substitute_internal@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@2@PEBV62@_K@Z
+    ?Substring@CordRepSubstring@cord_internal@absl@@SAPEAUCordRep@23@PEAU423@_K1@Z
+    ?SubstructResult@int128_internal@absl@@YA?AVuint128@2@V32@00@Z
+    ?SubtractSize@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SubtractSize@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SubtractSize@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SubtractSize@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?Summarize@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SuppressSigabortTrace@log_internal@absl@@YA_NXZ
+    ?Symbolize@absl@@YA_NPEBXPEADH@Z
+    ?TagToAllocatedSize@cord_internal@absl@@YA_KE@Z
+    ?TagToLength@cord_internal@absl@@YA_KE@Z
+    ?TakeRep@Cord@absl@@AEGBAPEAUCordRep@cord_internal@2@XZ
+    ?TakeRep@Cord@absl@@AEHAAPEAUCordRep@cord_internal@2@XZ
+    ?ThreadIsLoggingToLogSink@log_internal@absl@@YA_NXZ
+    ?ThrowBadStatusOrAccess@internal_statusor@absl@@YAXVStatus@2@@Z
+    ?ThrowBadVariantAccess@variant_internal@absl@@YAXXZ
+    ?ThrowSeedGenException@random_internal@absl@@YAXXZ
+    ?ThrowStdBadAlloc@base_internal@absl@@YAXXZ
+    ?ThrowStdBadFunctionCall@base_internal@absl@@YAXXZ
+    ?ThrowStdDomainError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdDomainError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPEBD@Z
+    ?Tick@PerThreadSem@synchronization_internal@absl@@SAXPEAUThreadIdentity@base_internal@3@@Z
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+    ?from_chars@absl@@YA?AUfrom_chars_result@1@PEBD0AEANW4chars_format@1@@Z
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+    ?front@string_view@absl@@QEBAAEBDXZ
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+    ?gbswap_32@absl@@YAII@Z
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+    ?get@?$Storage@PEAPEAVLogSink@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEGAAAEAPEAPEAVLogSink@4@XZ
+    ?get@?$Storage@PEAUPayload@status_internal@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEGAAAEAPEAUPayload@status_internal@4@XZ
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+    ?reset@?$unique_ptr@UThreadIdentity@base_internal@absl@@P6AXPEAX@Z@Cr@std@@QEAAXPEAUThreadIdentity@base_internal@absl@@@Z
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+    ?retreat@CordRepRing@cord_internal@absl@@QEBAII@Z
+    ?retreat@CordRepRing@cord_internal@absl@@QEBAIII@Z
+    ?rfind@string_view@absl@@QEBA_KD_K@Z
+    ?rfind@string_view@absl@@QEBA_KV12@_K@Z
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+    ?safe_strto64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_JH@Z
+    ?safe_strtou128_base@numbers_internal@absl@@YA_NVstring_view@2@PEAVuint128@2@H@Z
+    ?safe_strtou32_base@numbers_internal@absl@@YA_NVstring_view@2@PEAIH@Z
+    ?safe_strtou64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_KH@Z
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+    ?second@?$__compressed_pair@PEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEBAAEBV?$allocator@VFormatArgImpl@str_format_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVTimeZoneIf@cctz@time_internal@absl@@U?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVTimeZoneInfo@cctz@time_internal@absl@@U?$default_delete@VTimeZoneInfo@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@VTimeZoneInfo@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEBVImpl@time_zone@cctz@time_internal@absl@@U?$default_delete@$$CBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@$$CBVImpl@time_zone@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@U?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@23@@Cr@std@@QEAAAEAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@23@XZ
+    ?second@?$__compressed_pair@_KV?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@Cr@std@@@Cr@std@@QEAAAEAV?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@XZ
+    ?second@?$__compressed_pair@_KV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEAAAEAV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@23@XZ
+    ?second@?$__compressed_pair@_KV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@XZ
+    ?second@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBAHXZ
+    ?second@?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBAHXZ
+    ?set_arg@BoundConversion@str_format_internal@absl@@QEAAXPEBVFormatArgImpl@23@@Z
+    ?set_begin@CordRepBtree@cord_internal@absl@@AEAAX_K@Z
+    ?set_conversion_char@FormatConversionSpecImpl@str_format_internal@absl@@QEAAXW4FormatConversionChar@3@@Z
+    ?set_cordz_info@InlineData@cord_internal@absl@@QEAAXPEAVCordzInfo@23@@Z
+    ?set_cordz_mean_interval@cord_internal@absl@@YAXH@Z
+    ?set_data@InlineRep@Cord@absl@@QEAAPEAD_K@Z
+    ?set_data@InlineRep@Cord@absl@@QEAAXPEBD_K@Z
+    ?set_end@CordRepBtree@cord_internal@absl@@AEAAX_K@Z
+    ?set_from_arg@InputValue@UnboundConversion@str_format_internal@absl@@QEAAXH@Z
+    ?set_inline_size@InlineData@cord_internal@absl@@QEAAX_K@Z
+    ?set_inline_size@InlineRep@Cord@absl@@AEAAX_K@Z
+    ?set_short_length@Rep@CordBuffer@absl@@QEAAX_K@Z
+    ?set_tree@InlineData@cord_internal@absl@@QEAAXPEAUCordRep@23@@Z
+    ?set_value@InputValue@UnboundConversion@str_format_internal@absl@@QEAAXH@Z
+    ?shrink_to_fit@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ?size@?$BigUnsigned@$03@strings_internal@absl@@QEBAHXZ
+    ?size@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAHXZ
+    ?size@?$InlinedVector@H$0CP@V?$allocator@H@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$Span@$$CBD@absl@@QEBA_KXZ
+    ?size@?$Span@$$CBI@absl@@QEBA_KXZ
+    ?size@?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@D@absl@@QEBA_KXZ
+    ?size@?$Span@E@absl@@QEBA_KXZ
+    ?size@?$Span@G@absl@@QEBA_KXZ
+    ?size@?$Span@I@absl@@QEBA_KXZ
+    ?size@?$Span@PEAVLogSink@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@QEAUCordRep@cord_internal@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@VFormatArgImpl@str_format_internal@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@_K@absl@@QEBA_KXZ
+    ?size@?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEAAAEA_KXZ
+    ?size@?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAAAEA_KXZ
+    ?size@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$deque@PEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@QEBA_KXZ
+    ?size@?$initializer_list@VFormatArgImpl@str_format_internal@absl@@@std@@QEBA_KXZ
+    ?size@?$initializer_list@W4FormatConversionCharSet@absl@@@std@@QEBA_KXZ
+    ?size@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@AlphaNum@absl@@QEBA_KXZ
+    ?size@Cord@absl@@QEBA_KXZ
+    ?size@CordRepBtree@cord_internal@absl@@QEBA_KXZ
+    ?size@InlineRep@Cord@absl@@QEBA_KXZ
+    ?size@string_view@absl@@QEBA_KXZ
+    ?source_basename@LogEntry@absl@@QEBA?AVstring_view@2@XZ
+    ?source_line@LogEntry@absl@@QEBAHXZ
+    ?stacktrace@LogEntry@absl@@QEBA?AVstring_view@2@XZ
+    ?status@BadStatusOrAccess@absl@@QEBAAEBVStatus@2@XZ
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Uday_tag@1234@U51234@_J@Z
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Usecond_tag@1234@U51234@_J@Z
+    ?store@?$__atomic_base@PEAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@QEAAXPEAVCordzHandle@cord_internal@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@PEAVCordzInfo@cord_internal@absl@@$0A@@Cr@std@@QEAAXPEAVCordzInfo@cord_internal@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@W4OnDeadlockCycle@absl@@$0A@@Cr@std@@QEAAXW4OnDeadlockCycle@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@W4State@PerThreadSynch@base_internal@absl@@$0A@@Cr@std@@QEAAXW4State@PerThreadSynch@base_internal@absl@@W4memory_order@23@@Z
+    ?str@UntypedFormatSpecImpl@str_format_internal@absl@@QEBA?AVstring_view@3@XZ
+    ?sub_fetch_begin@CordRepBtree@cord_internal@absl@@AEAA_K_K@Z
+    ?substr@string_view@absl@@QEBA?AV12@_K0@Z
+    ?substring@CordRep@cord_internal@absl@@QEAAPEAUCordRepSubstring@23@XZ
+    ?substring@CordRep@cord_internal@absl@@QEBAPEBUCordRepSubstring@23@XZ
+    ?tag@InlineData@cord_internal@absl@@AEAAAEACXZ
+    ?tag@InlineData@cord_internal@absl@@AEBACXZ
+    ?tail@CordRepRing@cord_internal@absl@@QEBAIXZ
+    ?text_message_with_prefix_and_newline@LogEntry@absl@@QEBA?AVstring_view@2@XZ
+    ?text_message_with_prefix_and_newline_c_str@LogEntry@absl@@QEBAPEBDXZ
+    ?thread_identity@PerThreadSynch@base_internal@absl@@QEAAPEAUThreadIdentity@23@XZ
+    ?throw_bad_optional_access@optional_internal@absl@@YAXXZ
+    ?tid@LogEntry@absl@@QEBAIXZ
+    ?timestamp@LogEntry@absl@@QEBA?AVTime@2@XZ
+    ?total_written@BufferRawSink@str_format_internal@absl@@QEBA_KXZ
+    ?tree@InlineRep@Cord@absl@@QEBAPEAUCordRep@cord_internal@3@XZ
+    ?utc_time_zone@cctz@time_internal@absl@@YA?AVtime_zone@123@XZ
+    ?value@?$optional@_K@absl@@QEGAAAEA_KXZ
+    ?value@InputValue@UnboundConversion@str_format_internal@absl@@QEBAHXZ
+    ?version@time_zone@cctz@time_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?what@BadStatusOrAccess@absl@@UEBAPEBDXZ
+    ?what@SeedGenException@absl@@UEBAPEBDXZ
+    ?what@bad_optional_access@absl@@UEBAPEBDXZ
+    ?what@bad_variant_access@absl@@UEBAPEBDXZ
+    ?width@FormatConversionSpecImpl@str_format_internal@absl@@QEBAHXZ
+    ?words@?$BigUnsigned@$03@strings_internal@absl@@QEBAPEBIXZ
+    ?words@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAPEBIXZ
+    ?xsputn@LogEntryStreambuf@log_internal@absl@@MEAA_JPEBD_J@Z
+    ?xsputn@Streambuf@OStringStream@strings_internal@absl@@MEAA_JPEBD_J@Z
+    ?year@?$civil_time@Uday_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year@?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year@?$civil_time@Uyear_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year_index@impl@detail@cctz@time_internal@absl@@YAH_JC@Z
+    ?ymd_ord@impl@detail@cctz@time_internal@absl@@YA_J_JCC@Z
diff --git a/third_party/abseil-cpp/symbols_arm64_rel.def b/third_party/abseil-cpp/symbols_arm64_rel.def
new file mode 100644
index 0000000000..ec035df882
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_arm64_rel.def
@@ -0,0 +1,1106 @@
+EXPORTS
+    ??$?0AEBVCord@absl@@@?$optional_data_dtor_base@VCord@absl@@$0A@@optional_internal@absl@@IEAA@Uin_place_t@2@AEBVCord@2@@Z
+    ??$?0PEAI@?$SaltedSeedSeq@Vseed_seq@Cr@std@@@random_internal@absl@@QEAA@PEAI0@Z
+    ??$?0V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAA@$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6C@LogMessage@log_internal@absl@@QEAAAEAV012@AEBC@Z
+    ??$?6D@LogMessage@log_internal@absl@@QEAAAEAV012@AEBD@Z
+    ??$?6E@LogMessage@log_internal@absl@@QEAAAEAV012@AEBE@Z
+    ??$?6F@LogMessage@log_internal@absl@@QEAAAEAV012@AEBF@Z
+    ??$?6G@LogMessage@log_internal@absl@@QEAAAEAV012@AEBG@Z
+    ??$?6H@LogMessage@log_internal@absl@@QEAAAEAV012@AEBH@Z
+    ??$?6I@LogMessage@log_internal@absl@@QEAAAEAV012@AEBI@Z
+    ??$?6J@LogMessage@log_internal@absl@@QEAAAEAV012@AEBJ@Z
+    ??$?6K@LogMessage@log_internal@absl@@QEAAAEAV012@AEBK@Z
+    ??$?6M@LogMessage@log_internal@absl@@QEAAAEAV012@AEBM@Z
+    ??$?6N@LogMessage@log_internal@absl@@QEAAAEAV012@AEBN@Z
+    ??$?6PEAX@LogMessage@log_internal@absl@@QEAAAEAV012@AEBQEAX@Z
+    ??$?6PEBX@LogMessage@log_internal@absl@@QEAAAEAV012@AEBQEBX@Z
+    ??$?6V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@LogMessage@log_internal@absl@@QEAAAEAV012@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6Vstring_view@absl@@@LogMessage@log_internal@absl@@QEAAAEAV012@AEBVstring_view@2@@Z
+    ??$?6_J@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_J@Z
+    ??$?6_K@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_K@Z
+    ??$?6_N@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_N@Z
+    ??$?MUsecond_tag@detail@cctz@time_internal@absl@@U01234@@detail@cctz@time_internal@absl@@YA_NAEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@0123@0@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAPEBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAPEBD@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAY0CC@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAY0CC@$$CBD@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAY0CG@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAY0CG@$$CBD@Z
+    ??$AbslHashValue@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@YA?AVMixingHashState@01@V201@Vstring_view@1@@Z
+    ??$AddCordRep@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@PEAUCordRep@12@@Z
+    ??$AddCordRep@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@PEAUCordRep@12@@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@AEAA?AVstring_view@2@V32@_K@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@Vstring_view@2@_K@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@AEAA?AVstring_view@2@V32@_K@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@Vstring_view@2@_K@Z
+    ??$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV012@PEAV012@0_K1@Z
+    ??$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV012@PEAV012@0_K1@Z
+    ??$Append@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$AppendImpl@AEBVCord@absl@@@Cord@absl@@AEAAXAEBV01@@Z
+    ??$AppendImpl@VCord@absl@@@Cord@absl@@AEAAX$$QEAV01@@Z
+    ??$Base64EscapeInternal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPEBE_KPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_NPEBD@Z
+    ??$CallOnceImpl@A6AXXZ$$V@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@W4SchedulingMode@01@A6AXXZ@Z
+    ??$CastAndCallFunction@$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@CA_NPEBV01@@Z
+    ??$Compare@$0FE@$0FE@@strings_internal@absl@@YAHAEBV?$BigUnsigned@$0FE@@01@0@Z
+    ??$ConstructElements@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$IteratorValueAdapter@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$move_iterator@PEAPEAVLogSink@absl@@@23@@inlined_vector_internal@absl@@@inlined_vector_internal@absl@@YAXAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@PEAPEAVLogSink@1@AEAV?$IteratorValueAdapter@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$move_iterator@PEAPEAVLogSink@absl@@@23@@01@_K@Z
+    ??$Dispatch@C@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@D@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@E@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@F@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@G@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@PEBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$DivMod@$09@?$BigUnsigned@$03@strings_internal@absl@@AEAAIXZ
+    ??$DivMod@$09@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAIXZ
+    ??$EmplaceBack@AEBQEAVLogSink@absl@@@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAVLogSink@2@AEBQEAV32@@Z
+    ??$EmplaceBack@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAUPayload@status_internal@2@$$QEAU342@@Z
+    ??$EmplaceBackSlow@AEBQEAVLogSink@absl@@@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAAEAPEAVLogSink@2@AEBQEAV32@@Z
+    ??$EmplaceBackSlow@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAAEAUPayload@status_internal@2@$$QEAU342@@Z
+    ??$Fill@$00@CordRepRing@cord_internal@absl@@AEAAXPEBV012@II@Z
+    ??$Fill@$0A@@CordRepRing@cord_internal@absl@@AEAAXPEBV012@II@Z
+    ??$FindSubstitutions@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@strings_internal@absl@@YA?AV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@Vstring_view@1@AEBV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ??$Flush@V?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@VBufferRawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@VFILERawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$AddRing@$00@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$AddRing@$0A@@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$Fill@$00@CordRepRing@cord_internal@absl@@AEAAXPEBV234@II@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$Fill@$00@012@AEAAXPEBV012@II@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$Fill@$0A@@CordRepRing@cord_internal@absl@@AEAAXPEBV234@II@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$Fill@$0A@@012@AEAAXPEBV012@II@Z@@Z
+    ??$ForEach@V<lambda_2>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_2>@?0???$AddRing@$00@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$ForEach@V<lambda_2>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_2>@?0???$AddRing@$0A@@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$FormatConvertImpl@_N$0A@@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@01@_NVFormatConversionSpecImpl@01@PEAVFormatSinkImpl@01@@Z
+    ??$GenericCompare@HVCord@absl@@@absl@@YAHAEBVCord@0@0_K@Z
+    ??$GenericCompare@HVstring_view@absl@@@absl@@YAHAEBVCord@0@AEBVstring_view@0@_K@Z
+    ??$GenericCompare@_NVCord@absl@@@absl@@YA_NAEBVCord@0@0_K@Z
+    ??$GenericCompare@_NVstring_view@absl@@@absl@@YA_NAEBVCord@0@AEBVstring_view@0@_K@Z
+    ??$Merge@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@0@Z
+    ??$Merge@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@0@Z
+    ??$NewImpl@$0BAAA@$$V@CordRepFlat@cord_internal@absl@@SAPEAU012@_K@Z
+    ??$NewImpl@$0EAAAA@$$V@CordRepFlat@cord_internal@absl@@SAPEAU012@_K@Z
+    ??$NewLeaf@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@Vstring_view@2@_K@Z
+    ??$NewLeaf@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@Vstring_view@2@_K@Z
+    ??$ParseFloat@$09@strings_internal@absl@@YA?AUParsedFloat@01@PEBD0W4chars_format@1@@Z
+    ??$ParseFloat@$0BA@@strings_internal@absl@@YA?AUParsedFloat@01@PEBD0W4chars_format@1@@Z
+    ??$ParseFormatString@UParsedFormatConsumer@ParsedFormatBase@str_format_internal@absl@@@str_format_internal@absl@@YA_NVstring_view@1@UParsedFormatConsumer@ParsedFormatBase@01@@Z
+    ??$PopDead@_J_K@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AEAAPEAUHashtablezInfo@container_internal@2@_J_K@Z
+    ??$Prepend@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$Register@AEB_JAEA_K@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAAPEAUHashtablezInfo@container_internal@2@AEB_JAEA_K@Z
+    ??$SNPrintF@DHHH@absl@@YAHPEAD_KAEBV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@0@AEBDAEBH44@Z
+    ??$STLStringResizeUninitializedAmortized@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ??$SetEdge@$00@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$StrFormat@DHHHHH_JIVstring_view@absl@@HV12@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@0@AEBDAEBH2222AEB_JAEBIAEBVstring_view@0@25@Z
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+    ??$ToChronoDuration@V?$duration@_JV?$ratio@$00$0DOI@@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@_JV?$ratio@$00$0DOI@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToChronoDuration@V?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
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+    ??$__destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPEAUPayload@status_internal@absl@@@Z
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+    ?LockSlowLoop@Mutex@absl@@AEAAXPEAUSynchWaitParams@2@H@Z
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+    ?LogBacktraceIfNeeded@LogMessage@log_internal@absl@@AEAAXXZ
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+    ?MatchesConversions@ParsedFormatBase@str_format_internal@absl@@AEBA_N_NV?$initializer_list@W4FormatConversionCharSet@absl@@@std@@@Z
+    ?MaxFlatLength@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?MaxFramesInLogStackTrace@log_internal@absl@@YAHXZ
+    ?MaybeTrackCordImpl@CordzInfo@cord_internal@absl@@CAXAEAVInlineData@23@AEBV423@W4MethodIdentifier@CordzUpdateTracker@23@@Z
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+    ?MultiplyBy@?$BigUnsigned@$03@strings_internal@absl@@QEAAXI@Z
+    ?MultiplyBy@?$BigUnsigned@$03@strings_internal@absl@@QEAAX_K@Z
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+    ?MultiplyByFiveToTheNth@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyByFiveToTheNth@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyByTenToTheNth@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyByTenToTheNth@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
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+    ?New@CordRepRing@cord_internal@absl@@CAPEAV123@_K0@Z
+    ?NewArena@LowLevelAlloc@base_internal@absl@@SAPEAUArena@123@I@Z
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+    ?NextTransition@TimeZone@absl@@QEBA_NVTime@2@PEAUCivilTransition@12@@Z
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+    ?NoPrefix@LogMessage@log_internal@absl@@QEAAAEAV123@XZ
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+    ?Notify@Notification@absl@@QEAAXXZ
+    ?Now@CycleClock@base_internal@absl@@SA_JXZ
+    ?Now@UnscaledCycleClock@base_internal@absl@@CA_JXZ
+    ?Now@absl@@YA?AVTime@1@XZ
+    ?NumCPUs@base_internal@absl@@YAHXZ
+    ?OneTimeInitThreadIdentity@synchronization_internal@absl@@YAXPEAUThreadIdentity@base_internal@2@@Z
+    ?OutOfRangeError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
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+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
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+    ?ParseFlag@absl@@YA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAVTime@1@PEAV234@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParsePosixSpec@cctz@time_internal@absl@@YA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAUPosixTimeZone@123@@Z
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+    ?PermissionDeniedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
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+    ?Post@Waiter@synchronization_internal@absl@@QEAAXXZ
+    ?PrepareForSampling@HashtablezInfo@container_internal@absl@@QEAAX_J_K@Z
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+    ?PrepareToModify@Status@absl@@AEAAXXZ
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+    ?Prepend@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@Vstring_view@3@_K@Z
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+    ?PrependLeaf@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@_K2@Z
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+    ?PrependSlow@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@@Z
+    ?PrependTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToInlined@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrevTransition@TimeZone@absl@@QEBA_NVTime@2@PEAUCivilTransition@12@@Z
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+    ?PrevTransition@TimeZoneLibC@cctz@time_internal@absl@@UEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@time_zone@234@@Z
+    ?Print@Streamable@str_format_internal@absl@@QEBAAEAV?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@AEAV456@@Z
+    ?Ptr@GraphCycles@synchronization_internal@absl@@QEAAPEAXUGraphId@23@@Z
+    ?PushDead@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AEAAXPEAUHashtablezInfo@container_internal@3@@Z
+    ?PutPaddedString@FormatSinkImpl@str_format_internal@absl@@QEAA_NVstring_view@3@HH_N@Z
+    ?RawEnableLogPrefix@log_internal@absl@@YAX_N@Z
+    ?RawLog@raw_log_internal@absl@@YAXW4LogSeverity@2@PEBDH1ZZ
+    ?RawLoggingFullySupported@raw_log_internal@absl@@YA_NXZ
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+    ?RawSetStderrThreshold@log_internal@absl@@YAXW4LogSeverityAtLeast@2@@Z
+    ?Read@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUReadResult@123@_K0@Z
+    ?Read@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K0AEAPEAUCordRep@23@@Z
+    ?ReadDigits@?$BigUnsigned@$03@strings_internal@absl@@AEAAHPEBD0H@Z
+    ?ReadDigits@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAHPEBD0H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$03@strings_internal@absl@@QEAAHAEBUParsedFloat@23@H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAHAEBUParsedFloat@23@H@Z
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+    ?ReaderLockWhenWithTimeout@Mutex@absl@@QEAA_NAEBVCondition@2@VDuration@2@@Z
+    ?ReaderTryLock@Mutex@absl@@QEAA_NXZ
+    ?ReaderUnlock@Mutex@absl@@QEAAXXZ
+    ?Rebuild@CordRepBtree@cord_internal@absl@@CAXPEAPEAV123@PEAV123@_N@Z
+    ?Rebuild@CordRepBtree@cord_internal@absl@@SAPEAV123@PEAV123@@Z
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+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPEBDH000@Z@Z
+    ?RegisterCondVarTracer@absl@@YAXP6AXPEBDPEBX@Z@Z
+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQEBQEAXHP6AXPEBDPEAX@Z2@Z@Z
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+    ?RegisterLogFilterAndPrefixHook@raw_log_internal@absl@@YAXP6A_NW4LogSeverity@2@PEBDHPEAPEADPEAH@Z@Z
+    ?RegisterMutexProfiler@absl@@YAXP6AX_J@Z@Z
+    ?RegisterMutexTracer@absl@@YAXP6AXPEBDPEBX_J@Z@Z
+    ?RegisterSpinLockProfiler@base_internal@absl@@YAXP6AXPEBX_J@Z@Z
+    ?RegisterSymbolizer@absl@@YAXP6A_NPEBXPEADH@Z@Z
+    ?Release@ReleasableMutexLock@absl@@QEAAXXZ
+    ?Remove@CondVar@absl@@AEAAXPEAUPerThreadSynch@base_internal@2@@Z
+    ?RemoveEdge@GraphCycles@synchronization_internal@absl@@QEAAXUGraphId@23@0@Z
+    ?RemoveExtraAsciiWhitespace@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?RemoveLogSink@log_internal@absl@@YAXPEAVLogSink@2@@Z
+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QEAAXPEAX@Z
+    ?RemovePrefix@Cord@absl@@QEAAX_K@Z
+    ?RemovePrefix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?RemoveSuffix@Cord@absl@@QEAAX_K@Z
+    ?RemoveSuffix@CordRepBtree@cord_internal@absl@@SAPEAUCordRep@23@PEAV123@_K@Z
+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NAEBV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPEAUCordRep@12@V?$FunctionRef@$$A6AXPEAUCordRep@cord_internal@absl@@_K1@Z@2@@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?SampleSlow@container_internal@absl@@YAPEAUHashtablezInfo@12@AEAUSamplingState@12@_K@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AEAAXXZ
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QEAAX_K@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPEAUThreadIdentity@12@P6AXPEAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QEAAXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IEAAXXZ
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QEAAXVstring_view@2@VCord@2@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPEAPEAXPEAHHHPEBX1@Z@Z
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+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPEAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QEAAXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXXZ
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
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+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QEAA_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QEAA_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QEAAXXZ
+    ?SignalAll@CondVar@absl@@QEAAXXZ
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PEA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PEAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PEAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YA_KNPEAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AEAAXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AEAAXI@Z
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+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPEAU?$atomic@I@Cr@std@@HQEBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
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+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPEBD@Z
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+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPEBD@Z
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+    ?ToDoubleMicroseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleMilliseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleMinutes@absl@@YANVDuration@1@@Z
+    ?ToDoubleNanoseconds@absl@@YANVDuration@1@@Z
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+    ?ToInt64Hours@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Microseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Milliseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Minutes@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Nanoseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Seconds@absl@@YA_JVDuration@1@@Z
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+    ?WaitForNotification@Notification@absl@@QEBAXXZ
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+    ?WithThreadID@LogMessage@log_internal@absl@@QEAAAEAV123@I@Z
+    ?WithTimestamp@LogMessage@log_internal@absl@@QEAAAEAV123@VTime@3@@Z
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+    ?find_last_not_of@string_view@absl@@QEBA_KV12@_K@Z
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+    ?from_chars@absl@@YA?AUfrom_chars_result@1@PEBD0AEAMW4chars_format@1@@Z
+    ?from_chars@absl@@YA?AUfrom_chars_result@1@PEBD0AEANW4chars_format@1@@Z
+    ?get_cordz_mean_interval@cord_internal@absl@@YAHXZ
+    ?get_weekday@detail@cctz@time_internal@absl@@YA?AW4weekday@1234@AEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@1234@@Z
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+    ?max@?$RandenPool@E@random_internal@absl@@SAEXZ
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+    ?max@?$RandenPool@I@random_internal@absl@@SAIXZ
+    ?max@?$RandenPool@_K@random_internal@absl@@SA_KXZ
+    ?max@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@SA?AV12345@XZ
+    ?memcasecmp@strings_internal@absl@@YAHPEBD0_K@Z
+    ?memcspn@strings_internal@absl@@YA_KPEBD_K0@Z
+    ?memdup@strings_internal@absl@@YAPEADPEBD_K@Z
+    ?memmatch@strings_internal@absl@@YAPEBDPEBD_K01@Z
+    ?mempbrk@strings_internal@absl@@YAPEADPEBD_K0@Z
+    ?memrchr@strings_internal@absl@@YAPEADPEBDH_K@Z
+    ?memspn@strings_internal@absl@@YA_KPEBD_K0@Z
+    ?min@?$RandenPool@E@random_internal@absl@@SAEXZ
+    ?min@?$RandenPool@G@random_internal@absl@@SAGXZ
+    ?min@?$RandenPool@I@random_internal@absl@@SAIXZ
+    ?min@?$RandenPool@_K@random_internal@absl@@SA_KXZ
+    ?n_day@impl@detail@cctz@time_internal@absl@@YA?AUfields@2345@_JC00CCC@Z
+    ?n_hour@impl@detail@cctz@time_internal@absl@@YA?AUfields@2345@_J0000CC@Z
+    ?n_sec@impl@detail@cctz@time_internal@absl@@YA?AUfields@2345@_J00000@Z
+    ?name@time_zone@cctz@time_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?next_transition@time_zone@cctz@time_internal@absl@@QEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@1234@@Z
+    ?next_weekday@detail@cctz@time_internal@absl@@YA?AV?$civil_time@Uday_tag@detail@cctz@time_internal@absl@@@1234@V51234@W4weekday@1234@@Z
+    ?overflow@LogEntryStreambuf@log_internal@absl@@MEAAHH@Z
+    ?overflow@Streambuf@OStringStream@strings_internal@absl@@MEAAHH@Z
+    ?parse@detail@cctz@time_internal@absl@@YA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@0AEBVtime_zone@234@PEAV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@67@PEAV?$duration@_JV?$ratio@$00$0DINHOKEMGIAAA@@Cr@std@@@chrono@67@PEAV567@@Z
+    ?prev_transition@time_zone@cctz@time_internal@absl@@QEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@1234@@Z
+    ?prev_weekday@detail@cctz@time_internal@absl@@YA?AV?$civil_time@Uday_tag@detail@cctz@time_internal@absl@@@1234@V51234@W4weekday@1234@@Z
+    ?push_back@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX$$QEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ?push_back@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX$$QEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ?push_back@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXAEBQEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ?push_back@?$deque@PEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXAEBQEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ?push_back@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAAXAEBQEAVCordzHandle@cord_internal@absl@@@Z
+    ?push_back@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEAAXAEBQEAVLogSink@absl@@@Z
+    ?push_back@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAAXAEBQEBVCordzHandle@cord_internal@absl@@@Z
+    ?push_back@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAAX$$QEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ?push_back@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXAEBUTransition@cctz@time_internal@absl@@@Z
+    ?push_front@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXAEBQEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ?push_front@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX$$QEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ?raw_code@Status@absl@@QEBAHXZ
+    ?reserve@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?reserve@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?reserve@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?reset@?$unique_ptr@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@V?$__hash_node_destructor@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@23@@Cr@std@@QEAAXPEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@23@@Z
+    ?reset@?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@Cr@std@@QEAAXPEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Z
+    ?resize@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?resize@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?rfind@string_view@absl@@QEBA_KD_K@Z
+    ?rfind@string_view@absl@@QEBA_KV12@_K@Z
+    ?safe_strto128_base@numbers_internal@absl@@YA_NVstring_view@2@PEAVint128@2@H@Z
+    ?safe_strto32_base@numbers_internal@absl@@YA_NVstring_view@2@PEAHH@Z
+    ?safe_strto64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_JH@Z
+    ?safe_strtou128_base@numbers_internal@absl@@YA_NVstring_view@2@PEAVuint128@2@H@Z
+    ?safe_strtou32_base@numbers_internal@absl@@YA_NVstring_view@2@PEAIH@Z
+    ?safe_strtou64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_KH@Z
+    ?set_cordz_mean_interval@cord_internal@absl@@YAXH@Z
+    ?shallow_subcords_enabled@cord_internal@absl@@3U?$atomic@_N@Cr@std@@A
+    ?shrink_to_fit@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ?size@?$BigUnsigned@$03@strings_internal@absl@@QEBAHXZ
+    ?size@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAHXZ
+    ?size@Cord@absl@@QEBA_KXZ
+    ?status@BadStatusOrAccess@absl@@QEBAAEBVStatus@2@XZ
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Usecond_tag@1234@U51234@_J@Z
+    ?throw_bad_optional_access@optional_internal@absl@@YAXXZ
+    ?utc_time_zone@cctz@time_internal@absl@@YA?AVtime_zone@123@XZ
+    ?version@time_zone@cctz@time_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?what@BadStatusOrAccess@absl@@UEBAPEBDXZ
+    ?what@SeedGenException@absl@@UEBAPEBDXZ
+    ?what@bad_optional_access@absl@@UEBAPEBDXZ
+    ?what@bad_variant_access@absl@@UEBAPEBDXZ
+    ?words@?$BigUnsigned@$03@strings_internal@absl@@QEBAPEBIXZ
+    ?words@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAPEBIXZ
+    ?xsputn@LogEntryStreambuf@log_internal@absl@@MEAA_JPEBD_J@Z
+    ?xsputn@Streambuf@OStringStream@strings_internal@absl@@MEAA_JPEBD_J@Z
+    ?ymd_ord@impl@detail@cctz@time_internal@absl@@YA_J_JCC@Z
diff --git a/third_party/abseil-cpp/symbols_x64_dbg.def b/third_party/abseil-cpp/symbols_x64_dbg.def
new file mode 100644
index 0000000000..58598815b6
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_x64_dbg.def
@@ -0,0 +1,3906 @@
+EXPORTS
+    ??$?0$$CBD$0A@@VoidPtr@str_format_internal@absl@@QEAA@PEBD@Z
+    ??$?0$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@QEAA@P6A_NPEBU?$atomic@_N@Cr@std@@@Z0@Z
+    ??$?0$$CBUCordRep@cord_internal@absl@@@Hex@absl@@QEAA@PEBUCordRep@cord_internal@1@W4PadSpec@1@@Z
+    ??$?0$$CBVFormatArgImpl@str_format_internal@absl@@$$CBV012@@?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@V?$initializer_list@VFormatArgImpl@str_format_internal@absl@@@std@@@Z
+    ??$?0$$T@?$Storage@PEAPEAUCordRep@cord_internal@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEA$$T@Z
+    ??$?0$$T@?$Storage@PEAPEAVLogSink@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEA$$T@Z
+    ??$?0$$T@?$Storage@PEAUPayload@status_internal@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEAA@Uin_place_t@3@$$QEA$$T@Z
+    ??$?0$$TAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAPEAVCordzHandle@cord_internal@absl@@AEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@?$__compressed_pair@PEAPEAVLogSink@absl@@AEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEAVLogSink@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAPEBVCordzHandle@cord_internal@absl@@AEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@AEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$TAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@?$__compressed_pair@PEAUViableSubstitution@strings_internal@absl@@AEAV?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$TAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAPEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAUViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TU__default_init_tag@Cr@std@@@?$__compressed_pair@PEAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAA@$$QEA$$T$$QEAU__default_init_tag@12@@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEAVCordzHandle@cord_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEAVLogSink@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAPEBVCordzHandle@cord_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUTransition@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUTransitionType@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAUViableSubstitution@strings_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$TX@?$__compressed_pair_elem@PEAVFormatArgImpl@str_format_internal@absl@@$0A@$0A@@Cr@std@@QEAA@$$QEA$$T@Z
+    ??$?0$$V@?$__temp_value@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$V@?$__temp_value@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$?0$$Y_And@Cr@std@@$0A@@?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@QEAA@AEBVstring_view@absl@@AEBH@Z
+    ??$?0$00X@?$__compressed_pair@U?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@23@@Cr@std@@QEAA@XZ
+    ??$?0$00X@?$unique_ptr@$$BY0A@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@23@@Cr@std@@QEAA@XZ
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+    ??$Invoke@VMixingHashState@hash_internal@absl@@_K@UniquelyRepresentedProbe@HashSelect@hash_internal@absl@@SA?AVMixingHashState@23@V423@AEB_K@Z
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+    ??$SetEdge@$00@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$SharedCompareImpl@VCord@absl@@@absl@@YAHAEBVCord@0@0@Z
+    ??$SharedCompareImpl@Vstring_view@absl@@@absl@@YAHAEBVCord@0@AEBVstring_view@0@@Z
+    ??$SmallMemmove@$00@cord_internal@absl@@YAXPEADPEBD_K@Z
+    ??$SmallMemmove@$0A@@cord_internal@absl@@YAXPEADPEBD_K@Z
+    ??$StrAppend@$$V@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@0@1111@Z
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+    ??$ToInt@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@PEBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@VFormatArgImpl@str_format_internal@absl@@@FormatArgImplFriend@str_format_internal@absl@@SA_NVFormatArgImpl@12@PEAH@Z
+    ??$ToInt@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PEAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToIntVal@C@FormatArgImpl@str_format_internal@absl@@CAHAEBC@Z
+    ??$ToIntVal@D@FormatArgImpl@str_format_internal@absl@@CAHAEBD@Z
+    ??$ToIntVal@E@FormatArgImpl@str_format_internal@absl@@CAHAEBE@Z
+    ??$ToIntVal@F@FormatArgImpl@str_format_internal@absl@@CAHAEBF@Z
+    ??$ToIntVal@G@FormatArgImpl@str_format_internal@absl@@CAHAEBG@Z
+    ??$ToIntVal@H@FormatArgImpl@str_format_internal@absl@@CAHAEBH@Z
+    ??$ToIntVal@I@FormatArgImpl@str_format_internal@absl@@CAHAEBI@Z
+    ??$ToIntVal@J@FormatArgImpl@str_format_internal@absl@@CAHAEBJ@Z
+    ??$ToIntVal@K@FormatArgImpl@str_format_internal@absl@@CAHAEBK@Z
+    ??$ToIntVal@_J@FormatArgImpl@str_format_internal@absl@@CAHAEB_J@Z
+    ??$ToIntVal@_K@FormatArgImpl@str_format_internal@absl@@CAHAEB_K@Z
+    ??$ToIntVal@_N@FormatArgImpl@str_format_internal@absl@@CAHAEB_N@Z
+    ??$TrailingZeros@I@container_internal@absl@@YAII@Z
+    ??$UnhidePtr@X@base_internal@absl@@YAPEAX_K@Z
+    ??$__advance@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEBUTransition@cctz@time_internal@absl@@_JUrandom_access_iterator_tag@01@@Z
+    ??$__advance@PEBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAXAEAPEBVFormatArgImpl@str_format_internal@absl@@_JUrandom_access_iterator_tag@01@@Z
+    ??$__allocate_at_least@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEAVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEAVLogSink@absl@@@01@AEAV?$allocator@PEAVLogSink@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAPEBVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUTransition@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUTransitionType@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAUViableSubstitution@strings_internal@absl@@@01@AEAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@_K@Z
+    ??$__allocate_at_least@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PEAVFormatArgImpl@str_format_internal@absl@@@01@AEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@_K@Z
+    ??$__construct_at_end@PEBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAXPEBVFormatArgImpl@str_format_internal@absl@@0_K@Z
+    ??$__construct_at_end@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_node_hash@AEBUpiecewise_construct_t@Cr@std@@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAA?AV?$unique_ptr@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@V?$__hash_node_destructor@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@23@@12@_KAEBUpiecewise_construct_t@12@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QEAV?$tuple@$$V@12@@Z
+    ??$__construct_one_at_end@$$V@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXXZ
+    ??$__construct_one_at_end@$$V@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXXZ
+    ??$__construct_one_at_end@AEAVstring_view@absl@@AEBV12@AEA_K@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEAVstring_view@absl@@AEBV34@AEA_K@Z
+    ??$__construct_one_at_end@AEBQEAVCordzHandle@cord_internal@absl@@@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVCordzHandle@cord_internal@absl@@@Z
+    ??$__construct_one_at_end@AEBQEAVLogSink@absl@@@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVLogSink@absl@@@Z
+    ??$__construct_one_at_end@AEBQEBVCordzHandle@cord_internal@absl@@@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEBVCordzHandle@cord_internal@absl@@@Z
+    ??$__construct_one_at_end@AEBUTransition@cctz@time_internal@absl@@@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBUTransition@cctz@time_internal@absl@@@Z
+    ??$__construct_one_at_end@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAX$$QEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__copy@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@PEAV123@$0A@@Cr@std@@YA?AU?$pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@01@PEBVFormatArgImpl@str_format_internal@absl@@0PEAV345@@Z
+    ??$__copy_impl@$$CBVFormatArgImpl@str_format_internal@absl@@V123@X@Cr@std@@YA?AU?$pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@01@PEBVFormatArgImpl@str_format_internal@absl@@0PEAV345@@Z
+    ??$__cxx_atomic_compare_exchange_strong@PEAVTimeZone@absl@@@Cr@std@@YA_NPEAU?$__cxx_atomic_base_impl@PEAVTimeZone@absl@@@01@PEAPEAVTimeZone@absl@@PEAV34@W4memory_order@01@3@Z
+    ??$__cxx_atomic_compare_exchange_weak@PEAUHashtablezInfo@container_internal@absl@@@Cr@std@@YA_NPEAU?$__cxx_atomic_base_impl@PEAUHashtablezInfo@container_internal@absl@@@01@PEAPEAUHashtablezInfo@container_internal@absl@@PEAU345@W4memory_order@01@3@Z
+    ??$__cxx_atomic_load@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z@Cr@std@@YAP6AXAEBUHashtablezInfo@container_internal@absl@@@ZPEBU?$__cxx_atomic_base_impl@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAUHashtablezInfo@container_internal@absl@@@Cr@std@@YAPEAUHashtablezInfo@container_internal@absl@@PEBU?$__cxx_atomic_base_impl@PEAUHashtablezInfo@container_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAPEAVCordzHandle@cord_internal@absl@@PEBU?$__cxx_atomic_base_impl@PEAVCordzHandle@cord_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAVCordzInfo@cord_internal@absl@@@Cr@std@@YAPEAVCordzInfo@cord_internal@absl@@PEBU?$__cxx_atomic_base_impl@PEAVCordzInfo@cord_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PEAVTimeZone@absl@@@Cr@std@@YAPEAVTimeZone@absl@@PEBU?$__cxx_atomic_base_impl@PEAVTimeZone@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@W4OnDeadlockCycle@absl@@@Cr@std@@YA?AW4OnDeadlockCycle@absl@@PEBU?$__cxx_atomic_base_impl@W4OnDeadlockCycle@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@W4State@PerThreadSynch@base_internal@absl@@@Cr@std@@YA?AW4State@PerThreadSynch@base_internal@absl@@PEBU?$__cxx_atomic_base_impl@W4State@PerThreadSynch@base_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@PEAVCordzHandle@cord_internal@absl@@@01@PEAVCordzHandle@cord_internal@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@PEAVCordzInfo@cord_internal@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@PEAVCordzInfo@cord_internal@absl@@@01@PEAVCordzInfo@cord_internal@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@W4OnDeadlockCycle@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@W4OnDeadlockCycle@absl@@@01@W4OnDeadlockCycle@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@W4State@PerThreadSynch@base_internal@absl@@@Cr@std@@YAXPEAU?$__cxx_atomic_base_impl@W4State@PerThreadSynch@base_internal@absl@@@01@W4State@PerThreadSynch@base_internal@absl@@W4memory_order@01@@Z
+    ??$__debug_db_erase_c@V?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$unordered_map@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@@Cr@std@@YAXPEAV?$unordered_map@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$allocator@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@@Cr@std@@YAXPEAV?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPEAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__destroy_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@PEAUCordRep@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAUCordRep@cord_internal@absl@@@Z
+    ??$__destroy_at@PEAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAVCordzHandle@cord_internal@absl@@@Z
+    ??$__destroy_at@PEAVLogSink@absl@@$0A@@Cr@std@@YAXPEAPEAVLogSink@absl@@@Z
+    ??$__destroy_at@PEBVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEBVCordzHandle@cord_internal@absl@@@Z
+    ??$__destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$__destroy_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPEAUPayload@status_internal@absl@@@Z
+    ??$__destroy_at@UTransition@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransition@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@UTransitionType@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@UViableSubstitution@strings_internal@absl@@$0A@@Cr@std@@YAXPEAUViableSubstitution@strings_internal@absl@@@Z
+    ??$__destroy_at@VFormatArgImpl@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$__distance@PEBUPayload@status_internal@absl@@@Cr@std@@YA_JPEBUPayload@status_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YA_JPEBUTransition@cctz@time_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@PEBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YA_JPEBVFormatArgImpl@str_format_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__do_rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAAX_K@Z
+    ??$__emplace_back_slow_path@AEAVstring_view@absl@@AEBV12@AEA_K@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEAVstring_view@absl@@AEBV34@AEA_K@Z
+    ??$__emplace_unique_key_args@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBUpiecewise_construct_t@23@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QEAA?AU?$pair@V?$__hash_iterator@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@_N@12@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@AEBUpiecewise_construct_t@12@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QEAV?$tuple@$$V@12@@Z
+    ??$__invoke@AEAUByCivilTime@Transition@cctz@time_internal@absl@@AEBU2345@AEBU2345@@Cr@std@@YA_NAEAUByCivilTime@Transition@cctz@time_internal@absl@@AEBU3456@1@Z
+    ??$__invoke@AEAUByUnixTime@Transition@cctz@time_internal@absl@@AEBU2345@AEBU2345@@Cr@std@@YA_NAEAUByUnixTime@Transition@cctz@time_internal@absl@@AEBU3456@1@Z
+    ??$__invoke@AEAU__identity@Cr@std@@AEBUTransition@cctz@time_internal@absl@@@Cr@std@@YAAEBUTransition@cctz@time_internal@absl@@AEAU__identity@01@AEBU2345@@Z
+    ??$__launder@$$CBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEBU201@@Z
+    ??$__launder@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEAU201@@Z
+    ??$__lower_bound_impl@U_ClassicAlgPolicy@Cr@std@@PEBUTransition@cctz@time_internal@absl@@PEBU4567@U4567@U__identity@23@UByUnixTime@4567@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@AEAUByUnixTime@2345@AEAU__identity@01@@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV45678@PEAPEAPEBV45678@@Cr@std@@YA?AU?$pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@01@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAPEAVLogSink@absl@@PEAPEAV45@PEAPEAV45@@Cr@std@@YA?AU?$pair@PEAPEAVLogSink@absl@@PEAPEAV12@@01@PEAPEAVLogSink@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@PEAU4567@@Cr@std@@YA?AU?$pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransition@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@PEAU4567@@Cr@std@@YA?AU?$pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransitionType@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAPEAVLogSink@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVLogSink@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV45678@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV45678@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@UTransition@cctz@time_internal@absl@@U4567@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@UTransitionType@cctz@time_internal@absl@@U4567@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEAVLogSink@absl@@PEAPEAV45@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEAVLogSink@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV45678@X@Cr@std@@YA?AU?$pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@01@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAUViableSubstitution@strings_internal@absl@@PEAU456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAVCordzHandle@cord_internal@absl@@PEAV456@X@Cr@std@@YA?AU?$pair@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@@01@PEAPEAVCordzHandle@cord_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEAVLogSink@absl@@PEAV45@X@Cr@std@@YA?AU?$pair@PEAPEAVLogSink@absl@@PEAPEAV12@@01@PEAPEAVLogSink@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PEBVCordzHandle@cord_internal@absl@@PEBV456@X@Cr@std@@YA?AU?$pair@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@@01@PEAPEBVCordzHandle@cord_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@@01@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UTransition@cctz@time_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransition@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UTransitionType@cctz@time_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@01@PEAUTransitionType@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UViableSubstitution@strings_internal@absl@@U456@X@Cr@std@@YA?AU?$pair@PEAUViableSubstitution@strings_internal@absl@@PEAU123@@01@PEAUViableSubstitution@strings_internal@absl@@00@Z
+    ??$__push_back_slow_path@AEBQEAVCordzHandle@cord_internal@absl@@@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVCordzHandle@cord_internal@absl@@@Z
+    ??$__push_back_slow_path@AEBQEAVLogSink@absl@@@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEAVLogSink@absl@@@Z
+    ??$__push_back_slow_path@AEBQEBVCordzHandle@cord_internal@absl@@@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBQEBVCordzHandle@cord_internal@absl@@@Z
+    ??$__push_back_slow_path@AEBUTransition@cctz@time_internal@absl@@@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXAEBUTransition@cctz@time_internal@absl@@@Z
+    ??$__push_back_slow_path@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAX$$QEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAAX_K@Z
+    ??$__rewrap_iter@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@U?$__unwrap_iter_impl@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@0@Z
+    ??$__rewrap_iter@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@U?$__unwrap_iter_impl@PEAPEAVCordzHandle@cord_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@0@Z
+    ??$__rewrap_iter@PEAPEAVLogSink@absl@@PEAPEAV12@U?$__unwrap_iter_impl@PEAPEAVLogSink@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@0@Z
+    ??$__rewrap_iter@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@U?$__unwrap_iter_impl@PEAPEBVCordzHandle@cord_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@0@Z
+    ??$__rewrap_iter@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@U?$__unwrap_iter_impl@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@0@Z
+    ??$__rewrap_iter@PEAUTransition@cctz@time_internal@absl@@PEAU1234@U?$__unwrap_iter_impl@PEAUTransition@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@0@Z
+    ??$__rewrap_iter@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@U?$__unwrap_iter_impl@PEAUTransitionType@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@0@Z
+    ??$__rewrap_iter@PEAUViableSubstitution@strings_internal@absl@@PEAU123@U?$__unwrap_iter_impl@PEAUViableSubstitution@strings_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@0@Z
+    ??$__rewrap_iter@PEAVFormatArgImpl@str_format_internal@absl@@PEAV123@U?$__unwrap_iter_impl@PEAVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEAV234@0@Z
+    ??$__rewrap_iter@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@U?$__unwrap_iter_impl@PEBVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_range@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@PEBV123@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@0@Z
+    ??$__to_address@$$CBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@@Z
+    ??$__to_address@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@@Z
+    ??$__to_address@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@@Z
+    ??$__to_address@PEAVLogSink@absl@@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@@Z
+    ??$__to_address@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@@Z
+    ??$__to_address@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@@Z
+    ??$__to_address@UTransition@cctz@time_internal@absl@@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__to_address@UTransitionType@cctz@time_internal@absl@@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__to_address@UViableSubstitution@strings_internal@absl@@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@@Z
+    ??$__to_address@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEAV234@@Z
+    ??$__uninitialized_allocator_copy@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@VFormatArgImpl@str_format_internal@absl@@V456@$0A@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@AEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@PEBV234@1PEAV234@@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@23@V423@PEAVCordzHandle@cord_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$reverse_iterator@PEAPEAVLogSink@absl@@@23@V423@PEAVLogSink@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@AEAV?$allocator@PEAVLogSink@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@23@V423@PEBVCordzHandle@cord_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@AEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@23@V423@UConversionItem@ParsedFormatBase@str_format_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@PEAUTransition@cctz@time_internal@absl@@PEAU4567@U4567@X@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@01@PEAU2345@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@23@V423@UTransition@cctz@time_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@PEAUTransitionType@cctz@time_internal@absl@@PEAU4567@U4567@X@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@PEAU2345@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@23@V423@UTransitionType@cctz@time_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@23@V423@UViableSubstitution@strings_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@AEAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@V201@11@Z
+    ??$__unwrap_iter@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@@Z
+    ??$__unwrap_iter@PEAPEAVCordzHandle@cord_internal@absl@@U?$__unwrap_iter_impl@PEAPEAVCordzHandle@cord_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@@Z
+    ??$__unwrap_iter@PEAPEAVLogSink@absl@@U?$__unwrap_iter_impl@PEAPEAVLogSink@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@@Z
+    ??$__unwrap_iter@PEAPEBVCordzHandle@cord_internal@absl@@U?$__unwrap_iter_impl@PEAPEBVCordzHandle@cord_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@@Z
+    ??$__unwrap_iter@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@U?$__unwrap_iter_impl@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@@Z
+    ??$__unwrap_iter@PEAUTransition@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PEAUTransition@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__unwrap_iter@PEAUTransitionType@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PEAUTransitionType@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$__unwrap_iter@PEAUViableSubstitution@strings_internal@absl@@U?$__unwrap_iter_impl@PEAUViableSubstitution@strings_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@@Z
+    ??$__unwrap_iter@PEAVFormatArgImpl@str_format_internal@absl@@U?$__unwrap_iter_impl@PEAVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEAV234@@Z
+    ??$__unwrap_iter@PEBVFormatArgImpl@str_format_internal@absl@@U?$__unwrap_iter_impl@PEBVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPEBVFormatArgImpl@str_format_internal@absl@@PEBV234@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@V201@@Z
+    ??$__unwrap_range@PEBVFormatArgImpl@str_format_internal@absl@@PEBV123@@Cr@std@@YA?A?<auto>@@PEBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByCivilTime@Transition@cctz@time_internal@absl@@PEBU5678@PEBU5678@U5678@U__identity@23@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@$$QEAUByCivilTime@2345@$$QEAU__identity@01@@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByUnixTime@Transition@cctz@time_internal@absl@@PEBU5678@PEBU5678@U5678@U__identity@23@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@$$QEAUByUnixTime@2345@$$QEAU__identity@01@@Z
+    ??$advance@PEBUTransition@cctz@time_internal@absl@@_J@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAXAEAPEBUTransition@cctz@time_internal@absl@@_J@Z
+    ??$advance@PEBUTransition@cctz@time_internal@absl@@_J_JX@Cr@std@@YAXAEAPEBUTransition@cctz@time_internal@absl@@_J@Z
+    ??$advance@PEBVFormatArgImpl@str_format_internal@absl@@_K_KX@Cr@std@@YAXAEAPEBVFormatArgImpl@str_format_internal@absl@@_K@Z
+    ??$assign@PEBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAAXPEBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$assign@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$call_once@A6AXXZ$$V@absl@@YAXAEAVonce_flag@0@A6AXXZ@Z
+    ??$combine@H$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEBH@Z
+    ??$combine@V?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEBV?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@@Z
+    ??$combine@Vstring_view@absl@@H@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEBVstring_view@2@AEBH@Z
+    ??$combine@_K$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@AEB_K@Z
+    ??$combine_contiguous@D@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@PEBD_K@Z
+    ??$construct@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEAPEBV12345@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEAPEBV45678@@Z
+    ??$construct@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV12345@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@$$QEAPEAPEBV45678@@Z
+    ??$construct@PEAUCordRep@cord_internal@absl@@AEBQEAU123@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@12@PEAPEAUCordRep@cord_internal@absl@@AEBQEAU456@@Z
+    ??$construct@PEAUCordRep@cord_internal@absl@@PEAU123@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@12@PEAPEAUCordRep@cord_internal@absl@@$$QEAPEAU456@@Z
+    ??$construct@PEAVCordzHandle@cord_internal@absl@@AEBQEAV123@XX@?$allocator_traits@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@PEAPEAVCordzHandle@cord_internal@absl@@AEBQEAV456@@Z
+    ??$construct@PEAVLogSink@absl@@AEBQEAV12@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVLogSink@absl@@@12@PEAPEAVLogSink@absl@@AEBQEAV45@@Z
+    ??$construct@PEAVLogSink@absl@@PEAV12@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVLogSink@absl@@@12@PEAPEAVLogSink@absl@@$$QEAPEAV45@@Z
+    ??$construct@PEBVCordzHandle@cord_internal@absl@@AEBQEBV123@XX@?$allocator_traits@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@PEAPEBVCordzHandle@cord_internal@absl@@AEBQEBV456@@Z
+    ??$construct@PEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEBV12345@XX@?$allocator_traits@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEBV45678@@Z
+    ??$construct@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@AEBUpiecewise_construct_t@23@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@PEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@AEBUpiecewise_construct_t@12@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QEAV?$tuple@$$V@12@@Z
+    ??$construct@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$$QEAU4567@@Z
+    ??$construct@UPayload@status_internal@absl@@AEBU123@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UPayload@status_internal@absl@@@12@PEAUPayload@status_internal@absl@@AEBU456@@Z
+    ??$construct@UPayload@status_internal@absl@@U123@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UPayload@status_internal@absl@@@12@PEAUPayload@status_internal@absl@@$$QEAU456@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@$$VXX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@AEBU1234@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@AEBU4567@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@$$QEAU4567@@Z
+    ??$construct@UTransitionType@cctz@time_internal@absl@@$$VXX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$construct@UTransitionType@cctz@time_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PEAUTransitionType@cctz@time_internal@absl@@$$QEAU4567@@Z
+    ??$construct@UViableSubstitution@strings_internal@absl@@AEAVstring_view@3@AEBV43@AEA_KXX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@PEAUViableSubstitution@strings_internal@absl@@AEAVstring_view@6@AEBV76@AEA_K@Z
+    ??$construct@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$construct_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEAPEBV12345@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@AEBQEAPEBV23456@@Z
+    ??$construct_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV12345@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@$$QEAPEAPEBV23456@@Z
+    ??$construct_at@PEAUCordRep@cord_internal@absl@@AEBQEAU123@PEAPEAU123@@Cr@std@@YAPEAPEAUCordRep@cord_internal@absl@@PEAPEAU234@AEBQEAU234@@Z
+    ??$construct_at@PEAUCordRep@cord_internal@absl@@PEAU123@PEAPEAU123@@Cr@std@@YAPEAPEAUCordRep@cord_internal@absl@@PEAPEAU234@$$QEAPEAU234@@Z
+    ??$construct_at@PEAVCordzHandle@cord_internal@absl@@AEBQEAV123@PEAPEAV123@@Cr@std@@YAPEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV234@AEBQEAV234@@Z
+    ??$construct_at@PEAVLogSink@absl@@AEBQEAV12@PEAPEAV12@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@AEBQEAV23@@Z
+    ??$construct_at@PEAVLogSink@absl@@PEAV12@PEAPEAV12@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@$$QEAPEAV23@@Z
+    ??$construct_at@PEBVCordzHandle@cord_internal@absl@@AEBQEBV123@PEAPEBV123@@Cr@std@@YAPEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV234@AEBQEBV234@@Z
+    ??$construct_at@PEBVImpl@time_zone@cctz@time_internal@absl@@AEBQEBV12345@PEAPEBV12345@@Cr@std@@YAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEBV23456@AEBQEBV23456@@Z
+    ??$construct_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@AEBUpiecewise_construct_t@23@V?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@PEAU123@@Cr@std@@YAPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEAU201@AEBUpiecewise_construct_t@01@$$QEAV?$tuple@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@01@$$QEAV?$tuple@$$V@01@@Z
+    ??$construct_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U1234@PEAU1234@@Cr@std@@YAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU2345@$$QEAU2345@@Z
+    ??$construct_at@UPayload@status_internal@absl@@AEBU123@PEAU123@@Cr@std@@YAPEAUPayload@status_internal@absl@@PEAU234@AEBU234@@Z
+    ??$construct_at@UPayload@status_internal@absl@@U123@PEAU123@@Cr@std@@YAPEAUPayload@status_internal@absl@@PEAU234@$$QEAU234@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@$$VPEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@AEBU1234@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@AEBU2345@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@U1234@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@$$QEAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@$$VPEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@U1234@PEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@$$QEAU2345@@Z
+    ??$construct_at@UViableSubstitution@strings_internal@absl@@AEAVstring_view@3@AEBV43@AEA_KPEAU123@@Cr@std@@YAPEAUViableSubstitution@strings_internal@absl@@PEAU234@AEAVstring_view@4@AEBV54@AEA_K@Z
+    ??$copy@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@Cr@std@@YAPEAVFormatArgImpl@str_format_internal@absl@@PEBV234@0PEAV234@@Z
+    ??$countl_zero@_K@absl@@YAH_K@Z
+    ??$countr_zero@I@absl@@YAHI@Z
+    ??$destroy@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$destroy@PEAUCordRep@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@12@PEAPEAUCordRep@cord_internal@absl@@@Z
+    ??$destroy@PEAVCordzHandle@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@PEAPEAVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy@PEAVLogSink@absl@@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEAVLogSink@absl@@@12@PEAPEAVLogSink@absl@@@Z
+    ??$destroy@PEBVCordzHandle@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@PEAPEBVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@PEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$destroy@UConversionItem@ParsedFormatBase@str_format_internal@absl@@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$destroy@UPayload@status_internal@absl@@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UPayload@status_internal@absl@@@12@PEAUPayload@status_internal@absl@@@Z
+    ??$destroy@UTransition@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PEAUTransition@cctz@time_internal@absl@@@Z
+    ??$destroy@UTransitionType@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$destroy@UViableSubstitution@strings_internal@absl@@XX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@PEAUViableSubstitution@strings_internal@absl@@@Z
+    ??$destroy@VFormatArgImpl@str_format_internal@absl@@XX@?$allocator_traits@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@12@PEAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$destroy_at@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$destroy_at@PEAUCordRep@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAUCordRep@cord_internal@absl@@@Z
+    ??$destroy_at@PEAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEAVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy_at@PEAVLogSink@absl@@$0A@@Cr@std@@YAXPEAPEAVLogSink@absl@@@Z
+    ??$destroy_at@PEBVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPEAPEBVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$destroy_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPEAUPayload@status_internal@absl@@@Z
+    ??$destroy_at@UTransition@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransition@cctz@time_internal@absl@@@Z
+    ??$destroy_at@UTransitionType@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPEAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$destroy_at@UViableSubstitution@strings_internal@absl@@$0A@@Cr@std@@YAXPEAUViableSubstitution@strings_internal@absl@@@Z
+    ??$destroy_at@VFormatArgImpl@str_format_internal@absl@@$0A@@Cr@std@@YAXPEAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$distance@PEBUPayload@status_internal@absl@@@Cr@std@@YA_JPEBUPayload@status_internal@absl@@0@Z
+    ??$distance@PEBUTransition@cctz@time_internal@absl@@@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SA_JPEBUTransition@cctz@time_internal@absl@@0@Z
+    ??$distance@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YA_JPEBUTransition@cctz@time_internal@absl@@0@Z
+    ??$distance@PEBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YA_JPEBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$distance@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@01@0@Z
+    ??$distance@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@01@0@Z
+    ??$distance@V?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA_JV?$move_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@0@Z
+    ??$emplace@$$V@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA?AV?$__wrap_iter@PEAUTransition@cctz@time_internal@absl@@@12@V?$__wrap_iter@PEBUTransition@cctz@time_internal@absl@@@12@@Z
+    ??$emplace@$$V@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA?AV?$__wrap_iter@PEAUTransitionType@cctz@time_internal@absl@@@12@V?$__wrap_iter@PEBUTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$emplace_back@$$V@?$__split_buffer@UTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ??$emplace_back@$$V@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AEAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ??$emplace_back@AEAVstring_view@absl@@AEBV12@AEA_K@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAUViableSubstitution@strings_internal@absl@@AEAVstring_view@5@AEBV65@AEA_K@Z
+    ??$emplace_back@AEBQEAUCordRep@cord_internal@absl@@@?$InlinedVector@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEAAAEAPEAUCordRep@cord_internal@1@AEBQEAU231@@Z
+    ??$emplace_back@AEBQEAVLogSink@absl@@@?$InlinedVector@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@QEAAAEAPEAVLogSink@1@AEBQEAV21@@Z
+    ??$emplace_back@UPayload@status_internal@absl@@@?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAAAEAUPayload@status_internal@1@$$QEAU231@@Z
+    ??$exchange@_JH@absl@@YA_JAEA_J$$QEAH@Z
+    ??$find@V?$__wrap_iter@PEAPEAVLogSink@absl@@@Cr@std@@PEAVLogSink@absl@@@Cr@std@@YA?AV?$__wrap_iter@PEAPEAVLogSink@absl@@@01@V201@0AEBQEAVLogSink@absl@@@Z
+    ??$find@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QEAA?AV?$__hash_iterator@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@@Z
+    ??$find_first_non_full@X@container_internal@absl@@YA?AUFindInfo@01@PEBW4ctrl_t@01@_K1@Z
+    ??$forward@$$T@absl@@YA$$QEA$$TAEA$$T@Z
+    ??$forward@AEAI@absl@@YAAEAIAEAI@Z
+    ??$forward@AEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@YAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@AEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@YAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@AEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@AEA_K@absl@@YAAEA_KAEA_K@Z
+    ??$forward@AEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YAAEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AEBV123@@Z
+    ??$forward@AEBVCord@absl@@@absl@@YAAEBVCord@0@AEBV10@@Z
+    ??$forward@H@absl@@YA$$QEAHAEAH@Z
+    ??$forward@I@absl@@YA$$QEAIAEAI@Z
+    ??$forward@V?$allocator@H@Cr@std@@@absl@@YA$$QEAV?$allocator@H@Cr@std@@AEAV123@@Z
+    ??$forward@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@YA$$QEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@YA$$QEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YA$$QEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AEAV123@@Z
+    ??$forward@_K@absl@@YA$$QEA_KAEA_K@Z
+    ??$get@$00@?$CompressedTuple@V?$allocator@H@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@H@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@PEAPEAUCordRep@cord_internal@absl@@@container_internal@absl@@QEGAAAEAPEAPEAUCordRep@cord_internal@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@PEAPEAVLogSink@absl@@@container_internal@absl@@QEGAAAEAPEAPEAVLogSink@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PEAUPayload@status_internal@absl@@@container_internal@absl@@QEGAAAEAPEAUPayload@status_internal@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEA_KXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEB_KXZ
+    ??$get@$00AEBVstring_view@absl@@AEBH@Cr@std@@YAAEBHAEBV?$tuple@AEBVstring_view@absl@@AEBH@01@@Z
+    ??$get@$00Vstring_view@absl@@V12@@Cr@std@@YAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@01@@Z
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@H@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@H@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@PEAPEAUCordRep@cord_internal@absl@@@container_internal@absl@@QEGAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@PEAPEAVLogSink@absl@@@container_internal@absl@@QEGAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PEAVLogSink@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PEAUPayload@status_internal@absl@@@container_internal@absl@@QEGAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@_K@container_internal@absl@@QEGBAAEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@AEBVstring_view@absl@@AEBH@Cr@std@@YAAEBVstring_view@absl@@AEBV?$tuple@AEBVstring_view@absl@@AEBH@01@@Z
+    ??$get@$0A@Vstring_view@absl@@V12@@Cr@std@@YAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@01@@Z
+    ??$get@Vstring_view@absl@@V12@@?$__get_pair@$00@Cr@std@@SAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@12@@Z
+    ??$get@Vstring_view@absl@@V12@@?$__get_pair@$0A@@Cr@std@@SAAEBVstring_view@absl@@AEBU?$pair@Vstring_view@absl@@V12@@12@@Z
+    ??$hash@V?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@$0A@@MixingHashState@hash_internal@absl@@SA_KAEBV?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@@Z
+    ??$hash_bytes@VMixingHashState@hash_internal@absl@@H@hash_internal@absl@@YA?AVMixingHashState@01@V201@AEBH@Z
+    ??$hash_bytes@VMixingHashState@hash_internal@absl@@_K@hash_internal@absl@@YA?AVMixingHashState@01@V201@AEB_K@Z
+    ??$hash_range_or_bytes@VMixingHashState@hash_internal@absl@@D@hash_internal@absl@@YA?AVMixingHashState@01@V201@PEBD_K@Z
+    ??$hash_tuple@VMixingHashState@hash_internal@absl@@V?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@$0A@$00@hash_internal@absl@@YA?AVMixingHashState@01@V201@AEBV?$tuple@AEBVstring_view@absl@@AEBH@Cr@std@@U?$integer_sequence@_K$0A@$00@1@@Z
+    ??$launder@$$CBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEBU201@@Z
+    ??$launder@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPEAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@01@PEAU201@@Z
+    ??$lower_bound@PEBUTransition@cctz@time_internal@absl@@U1234@UByUnixTime@1234@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@UByUnixTime@2345@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@AEAV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@AEAV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@$$QEAV301@@Z
+    ??$make_pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@Cr@std@@YA?AU?$pair@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@01@$$QEAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@@Cr@std@@YA?AU?$pair@PEAPEAVCordzHandle@cord_internal@absl@@PEAPEAV123@@01@$$QEAPEAPEAVCordzHandle@cord_internal@absl@@0@Z
+    ??$make_pair@PEAPEAVLogSink@absl@@PEAPEAV12@@Cr@std@@YA?AU?$pair@PEAPEAVLogSink@absl@@PEAPEAV12@@01@$$QEAPEAPEAVLogSink@absl@@0@Z
+    ??$make_pair@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@@Cr@std@@YA?AU?$pair@PEAPEBVCordzHandle@cord_internal@absl@@PEAPEBV123@@01@$$QEAPEAPEBVCordzHandle@cord_internal@absl@@0@Z
+    ??$make_pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@@Cr@std@@YA?AU?$pair@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PEAU1234@@01@$$QEAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@0@Z
+    ??$make_pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YA?AU?$pair@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@01@$$QEAPEAUTransition@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YA?AU?$pair@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@01@$$QEAPEAUTransitionType@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PEAUViableSubstitution@strings_internal@absl@@PEAU123@@Cr@std@@YA?AU?$pair@PEAUViableSubstitution@strings_internal@absl@@PEAU123@@01@$$QEAPEAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$make_pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@Cr@std@@YA?AU?$pair@PEBVFormatArgImpl@str_format_internal@absl@@PEAV123@@01@$$QEAPEBVFormatArgImpl@str_format_internal@absl@@$$QEAPEAV345@@Z
+    ??$make_pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@$$QEAV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@0@Z
+    ??$make_unique@ULogMessageData@LogMessage@log_internal@absl@@AEAPEBDAEAHAEAW4LogSeverity@4@VTime@4@@Cr@std@@YA?AV?$unique_ptr@ULogMessageData@LogMessage@log_internal@absl@@U?$default_delete@ULogMessageData@LogMessage@log_internal@absl@@@Cr@std@@@01@AEAPEBDAEAHAEAW4LogSeverity@absl@@$$QEAVTime@4@@Z
+    ??$make_unique@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@$$V@Cr@std@@YA?AV?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@01@XZ
+    ??$make_unique@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@AEAV12@@Cr@std@@YA?AV?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@01@AEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Z
+    ??$max@VDuration@absl@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0@Z
+    ??$max@VDuration@absl@@U?$__less@VDuration@absl@@V12@@Cr@std@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0U?$__less@VDuration@absl@@V12@@01@@Z
+    ??$max_size@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@12@@Z
+    ??$max_size@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAUCordRep@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEAVLogSink@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEAVLogSink@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEBVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@@Z
+    ??$max_size@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UPayload@status_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@UViableSubstitution@strings_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@SA_KAEBV?$allocator@VFormatArgImpl@str_format_internal@absl@@@12@@Z
+    ??$min@VDuration@absl@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0@Z
+    ??$min@VDuration@absl@@U?$__less@VDuration@absl@@V12@@Cr@std@@@Cr@std@@YAAEBVDuration@absl@@AEBV23@0U?$__less@VDuration@absl@@V12@@01@@Z
+    ??$move@AEA_J@absl@@YA$$QEA_JAEA_J@Z
+    ??$move@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$move@PEAPEAVLogSink@absl@@PEAPEAV12@@Cr@std@@YAPEAPEAVLogSink@absl@@PEAPEAV23@00@Z
+    ??$move@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$move@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$move@V?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVCordzHandle@cord_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAPEAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAPEAVLogSink@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAPEBVCordzHandle@cord_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransition@cctz@time_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUTransitionType@cctz@time_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PEAUViableSubstitution@strings_internal@absl@@@01@V201@00@Z
+    ??$move_backward@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV12345@@Cr@std@@YAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@PEAPEAPEBV23456@00@Z
+    ??$move_backward@PEAUTransition@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$move_backward@PEAUTransitionType@cctz@time_internal@absl@@PEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@00@Z
+    ??$next@AEAPEBUTransition@cctz@time_internal@absl@@@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAPEBUTransition@cctz@time_internal@absl@@AEAPEBU3456@_J@Z
+    ??$next@PEBUTransition@cctz@time_internal@absl@@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@_J@Z
+    ??$reset@PEAPEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@?$unique_ptr@$$BY0A@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@23@@Cr@std@@QEAAXPEAPEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@12@@Z
+    ??$swap@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@0@Z
+    ??$swap@PEAPEAVCordzHandle@cord_internal@absl@@@Cr@std@@YAXAEAPEAPEAVCordzHandle@cord_internal@absl@@0@Z
+    ??$swap@PEAPEAVLogSink@absl@@@Cr@std@@YAXAEAPEAPEAVLogSink@absl@@0@Z
+    ??$swap@PEAPEBVCordzHandle@cord_internal@absl@@@Cr@std@@YAXAEAPEAPEBVCordzHandle@cord_internal@absl@@0@Z
+    ??$swap@PEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@YAXAEAPEAUConversionItem@ParsedFormatBase@str_format_internal@absl@@0@Z
+    ??$swap@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEAUTransition@cctz@time_internal@absl@@0@Z
+    ??$swap@PEAUTransitionType@cctz@time_internal@absl@@@Cr@std@@YAXAEAPEAUTransitionType@cctz@time_internal@absl@@0@Z
+    ??$swap@PEAUViableSubstitution@strings_internal@absl@@@Cr@std@@YAXAEAPEAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$swap@PEBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@YAXAEAPEBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@0@Z
+    ??$swap@UViableSubstitution@strings_internal@absl@@@Cr@std@@YAXAEAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$swap@Vstring_view@absl@@@Cr@std@@YAXAEAVstring_view@absl@@0@Z
+    ??$tie@$$CBVstring_view@absl@@$$CBH@Cr@std@@YA?AV?$tuple@AEBVstring_view@absl@@AEBH@01@AEBVstring_view@absl@@AEBH@Z
+    ??$upper_bound@PEBUTransition@cctz@time_internal@absl@@U1234@UByCivilTime@1234@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@UByCivilTime@2345@@Z
+    ??$upper_bound@PEBUTransition@cctz@time_internal@absl@@U1234@UByUnixTime@1234@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@UByUnixTime@2345@@Z
+    ??0?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@Z
+    ??0?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@@Z
+    ??0?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QEAA@Vstring_view@2@@Z
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QEAA@XZ
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QEAA@_K@Z
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QEAA@Vstring_view@2@@Z
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QEAA@XZ
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QEAA@_K@Z
+    ??0?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@absl@@QEAA@PEBD@Z
+    ??0?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@absl@@QEAA@PEBD@Z
+    ??0?$InlinedVector@H$0CP@V?$allocator@H@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAA@AEBV01@@Z
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAA@AEBV01@AEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEAA@XZ
+    ??0?$IteratorValueAdapter@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@V?$move_iterator@PEAPEAUCordRep@cord_internal@absl@@@23@@inlined_vector_internal@absl@@QEAA@AEBV?$move_iterator@PEAPEAUCordRep@cord_internal@absl@@@Cr@std@@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$move_iterator@PEAPEAVLogSink@absl@@@23@@inlined_vector_internal@absl@@QEAA@AEBV?$move_iterator@PEAPEAVLogSink@absl@@@Cr@std@@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PEBUPayload@status_internal@absl@@@inlined_vector_internal@absl@@QEAA@AEBQEBUPayload@status_internal@2@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@V?$move_iterator@PEAUPayload@status_internal@absl@@@23@@inlined_vector_internal@absl@@QEAA@AEBV?$move_iterator@PEAUPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$Layout@_KPEAUCordRep@cord_internal@absl@@I@container_internal@absl@@QEAA@_K00@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$0A@$00$01@absl@@U45@@internal_layout@container_internal@absl@@QEAA@_K00@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$0A@$00@absl@@U?$integer_sequence@_K$0A@$00$01@5@@internal_layout@container_internal@absl@@QEAA@_K0@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$0A@@absl@@U?$integer_sequence@_K$0A@$00@5@@internal_layout@container_internal@absl@@QEAA@_K@Z
+    ??0?$LayoutImpl@V?$tuple@_KPEAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@_K$S@absl@@U?$integer_sequence@_K$0A@@5@@internal_layout@container_internal@absl@@QEAA@XZ
+    ??0?$NonIterableBitMask@I$0BA@$0A@@container_internal@absl@@QEAA@I@Z
+    ??0?$RandenPool@E@random_internal@absl@@QEAA@XZ
+    ??0?$RandenPool@G@random_internal@absl@@QEAA@XZ
+    ??0?$RandenPool@I@random_internal@absl@@QEAA@XZ
+    ??0?$RandenPool@_K@random_internal@absl@@QEAA@XZ
+    ??0?$Sample@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAA@XZ
+    ??0?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAA@XZ
+    ??0?$Span@$$CBD@absl@@QEAA@PEBD_K@Z
+    ??0?$Span@$$CBD@absl@@QEAA@XZ
+    ??0?$Span@$$CBI@absl@@QEAA@PEBI_K@Z
+    ??0?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@PEBVFormatArgImpl@str_format_internal@1@_K@Z
+    ??0?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@XZ
+    ??0?$Span@D@absl@@QEAA@PEAD_K@Z
+    ??0?$Span@D@absl@@QEAA@XZ
+    ??0?$Span@I@absl@@QEAA@PEAI_K@Z
+    ??0?$Span@PEAVLogSink@absl@@@absl@@QEAA@PEAPEAVLogSink@1@_K@Z
+    ??0?$Span@QEAUCordRep@cord_internal@absl@@@absl@@QEAA@PEBQEAUCordRep@cord_internal@1@_K@Z
+    ??0?$Span@QEAX@absl@@QEAA@PEBQEAX_K@Z
+    ??0?$Span@VFormatArgImpl@str_format_internal@absl@@@absl@@QEAA@PEAVFormatArgImpl@str_format_internal@1@_K@Z
+    ??0?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@AEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAA@XZ
+    ??0?$__allocator_destructor@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAA@AEAV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@12@_K@Z
+    ??0?$__atomic_base@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z$0A@@Cr@std@@QEAA@P6AXAEBUHashtablezInfo@container_internal@absl@@@Z@Z
+    ??0?$__atomic_base@PEAUHashtablezInfo@container_internal@absl@@$0A@@Cr@std@@QEAA@PEAUHashtablezInfo@container_internal@absl@@@Z
+    ??0?$__atomic_base@PEAVCordzInfo@cord_internal@absl@@$0A@@Cr@std@@QEAA@PEAVCordzInfo@cord_internal@absl@@@Z
+    ??0?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEAA@XZ
+    ??0?$__compressed_pair_elem@PEAPEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
+    ??0?$__compressed_pair_elem@PEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
+    ??0?$__compressed_pair_elem@PEAVZoneInfoSource@cctz@time_internal@absl@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
+    ??0?$__compressed_pair_elem@U?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@$0A@$0A@@Cr@std@@QEAA@U__value_init_tag@12@@Z
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+    ?GetAllocatedData@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetAllocatedData@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAVLogSink@3@XZ
+    ?GetAllocatedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAUPayload@status_internal@3@XZ
+    ?GetAllocatedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAPEBUPayload@status_internal@3@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@H@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEBV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAppendBuffer@CordRepBtree@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
+    ?GetAppendBuffer@CordRepRing@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
+    ?GetAppendBufferSlow@CordRepBtree@cord_internal@absl@@AEAA?AV?$Span@D@3@_K@Z
+    ?GetAppendBufferSlowPath@Cord@absl@@AEAA?AVCordBuffer@2@_K00@Z
+    ?GetCachedTID@base_internal@absl@@YAIXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetCharacter@CordRepBtree@cord_internal@absl@@QEBAD_K@Z
+    ?GetCharacter@CordRepRing@cord_internal@absl@@QEBAD_K@Z
+    ?GetCond@WinHelper@Waiter@synchronization_internal@absl@@SAPEAU_RTL_CONDITION_VARIABLE@@PEAV234@@Z
+    ?GetCordzStatistics@CordzInfo@cord_internal@absl@@QEBA?AUCordzStatistics@23@XZ
+    ?GetCurrentTimeNanos@absl@@YA_JXZ
+    ?GetData@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetData@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAPEAVLogSink@3@XZ
+    ?GetData@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAUPayload@status_internal@3@XZ
+    ?GetDebugStackTraceHook@debugging_internal@absl@@YAP6AXQEBQEAXHP6AXPEBDPEAX@Z2@ZXZ
+    ?GetEstimatedFairShareMemoryUsage@cord_internal@absl@@YA_KPEBUCordRep@12@@Z
+    ?GetEstimatedMemoryUsage@cord_internal@absl@@YA_KPEBUCordRep@12@@Z
+    ?GetFirstChunk@Cord@absl@@CA?AVstring_view@2@AEBV12@@Z
+    ?GetFirstChunk@Cord@absl@@CA?AVstring_view@2@V32@@Z
+    ?GetFlatAux@Cord@absl@@CA_NPEAUCordRep@cord_internal@2@PEAVstring_view@2@@Z
+    ?GetHashtablezMaxSamples@container_internal@absl@@YA_KXZ
+    ?GetHashtablezSampleParameter@container_internal@absl@@YAHXZ
+    ?GetId@GraphCycles@synchronization_internal@absl@@QEAA?AUGraphId@23@PEAX@Z
+    ?GetInlinedCapacity@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetInlinedCapacity@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetInlinedCapacity@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetInlinedData@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAHXZ
+    ?GetInlinedData@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetInlinedData@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAUCordRep@cord_internal@3@XZ
+    ?GetInlinedData@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAPEAVLogSink@3@XZ
+    ?GetInlinedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAPEAUPayload@status_internal@3@XZ
+    ?GetInlinedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAPEBUPayload@status_internal@3@XZ
+    ?GetIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_NXZ
+    ?GetKeys@RandenHwAes@random_internal@absl@@SAPEBXXZ
+    ?GetKeys@RandenSlow@random_internal@absl@@SAPEBXXZ
+    ?GetLeafData@CordRepRing@cord_internal@absl@@SAPEBDPEBUCordRep@23@@Z
+    ?GetLock@WinHelper@Waiter@synchronization_internal@absl@@SAPEAU_RTL_SRWLOCK@@PEAV234@@Z
+    ?GetMaxSamples@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEBA_KXZ
+    ?GetOrCreateCurrentThreadIdentity@synchronization_internal@absl@@YAPEAUThreadIdentity@base_internal@2@XZ
+    ?GetParentMethod@CordzInfo@cord_internal@absl@@CA?AW4MethodIdentifier@CordzUpdateTracker@23@PEBV123@@Z
+    ?GetParentStack@CordzInfo@cord_internal@absl@@QEBA?AV?$Span@QEAX@3@XZ
+    ?GetPayload@Status@absl@@QEBA?AV?$optional@VCord@absl@@@2@Vstring_view@2@@Z
+    ?GetPayloads@Status@absl@@AEAAPEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@2@XZ
+    ?GetPayloads@Status@absl@@AEBAPEBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@2@XZ
+    ?GetPrependBuffer@CordRepRing@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
+    ?GetProgramCounter@debugging_internal@absl@@YAPEAXQEAX@Z
+    ?GetRepData@CordRepRing@cord_internal@absl@@SAPEBDPEBUCordRep@23@@Z
+    ?GetRepHi@time_internal@absl@@YA_JVDuration@2@@Z
+    ?GetRepLo@time_internal@absl@@YAIVDuration@2@@Z
+    ?GetSaltMaterial@random_internal@absl@@YA?AV?$optional@I@2@XZ
+    ?GetSize@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSize@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEA_KXZ
+    ?GetSizeAndIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEBAAEB_KXZ
+    ?GetSkipCount@ExponentialBiased@profiling_internal@absl@@QEAA_J_J@Z
+    ?GetStack@CordzInfo@cord_internal@absl@@QEBA?AV?$Span@QEAX@3@XZ
+    ?GetStackFrames@absl@@YAHPEAPEAXPEAHHH@Z
+    ?GetStackFramesWithContext@absl@@YAHPEAPEAXPEAHHHPEBX1@Z
+    ?GetStackTrace@GraphCycles@synchronization_internal@absl@@QEAAHUGraphId@23@PEAPEAPEAX@Z
+    ?GetStackTrace@absl@@YAHPEAPEAXHH@Z
+    ?GetStackTraceWithContext@absl@@YAHPEAPEAXHHPEBXPEAH@Z
+    ?GetStatusPayloadPrinter@status_internal@absl@@YAP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@AEBVCord@2@@ZXZ
+    ?GetStride@ExponentialBiased@profiling_internal@absl@@QEAA_J_J@Z
+    ?GetTID@base_internal@absl@@YAIXZ
+    ?GetTagForChar@str_format_internal@absl@@YA?AVConvTag@12@D@Z
+    ?GetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAPEAU?$atomic@H@Cr@std@@XZ
+    ?GetTransitionType@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NH_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAE@Z
+    ?GetWaiter@Waiter@synchronization_internal@absl@@SAPEAV123@PEAUThreadIdentity@base_internal@3@@Z
+    ?GetWeekday@absl@@YA?AW4weekday@detail@cctz@time_internal@1@V?$civil_time@Usecond_tag@time_internal@absl@@@3451@@Z
+    ?GetWord@?$BigUnsigned@$03@strings_internal@absl@@QEBAIH@Z
+    ?GetWord@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAIH@Z
+    ?GetYearDay@absl@@YAHV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?GlobalHashtablezSampler@container_internal@absl@@YAAEAV?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@2@XZ
+    ?GuaranteedEqual@Condition@absl@@SA_NPEBV12@0@Z
+    ?Guard@?$NullGuard@C@log_internal@absl@@SAAEBCAEBC@Z
+    ?Guard@?$NullGuard@D@log_internal@absl@@SAAEBDAEBD@Z
+    ?Guard@?$NullGuard@E@log_internal@absl@@SAAEBEAEBE@Z
+    ?Guard@?$NullGuard@F@log_internal@absl@@SAAEBFAEBF@Z
+    ?Guard@?$NullGuard@G@log_internal@absl@@SAAEBGAEBG@Z
+    ?Guard@?$NullGuard@H@log_internal@absl@@SAAEBHAEBH@Z
+    ?Guard@?$NullGuard@I@log_internal@absl@@SAAEBIAEBI@Z
+    ?Guard@?$NullGuard@J@log_internal@absl@@SAAEBJAEBJ@Z
+    ?Guard@?$NullGuard@K@log_internal@absl@@SAAEBKAEBK@Z
+    ?Guard@?$NullGuard@M@log_internal@absl@@SAAEBMAEBM@Z
+    ?Guard@?$NullGuard@N@log_internal@absl@@SAAEBNAEBN@Z
+    ?Guard@?$NullGuard@PEAX@log_internal@absl@@SAAEBQEAXAEBQEAX@Z
+    ?Guard@?$NullGuard@PEBX@log_internal@absl@@SAAEBQEBXAEBQEBX@Z
+    ?Guard@?$NullGuard@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@log_internal@absl@@SAAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBV456@@Z
+    ?Guard@?$NullGuard@Vstring_view@absl@@@log_internal@absl@@SAAEBVstring_view@3@AEBV43@@Z
+    ?Guard@?$NullGuard@_J@log_internal@absl@@SAAEB_JAEB_J@Z
+    ?Guard@?$NullGuard@_K@log_internal@absl@@SAAEB_KAEB_K@Z
+    ?Guard@?$NullGuard@_N@log_internal@absl@@SAAEB_NAEB_N@Z
+    ?H1@container_internal@absl@@YA_K_KPEBW4ctrl_t@12@@Z
+    ?HandleInvalidStatusCtorArg@Helper@internal_statusor@absl@@SAXPEAVStatus@3@@Z
+    ?HasBeenNotifiedInternal@Notification@absl@@CA_NPEBU?$atomic@_N@Cr@std@@@Z
+    ?HasEdge@GraphCycles@synchronization_internal@absl@@QEBA_NUGraphId@23@0@Z
+    ?HasNode@GraphCycles@synchronization_internal@absl@@QEAA_NUGraphId@23@@Z
+    ?HasRandenHwAesImplementation@random_internal@absl@@YA_NXZ
+    ?Head@CordzInfo@cord_internal@absl@@SAPEAV123@AEBVCordzSnapshot@23@@Z
+    ?HexStringToBytes@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?HideMask@base_internal@absl@@YA_KXZ
+    ?HighestBitSet@?$NonIterableBitMask@I$0BA@$0A@@container_internal@absl@@QEBAIXZ
+    ?IDivDuration@absl@@YA_JVDuration@1@0PEAV21@@Z
+    ?IDivDuration@time_internal@absl@@YA_J_NVDuration@2@1PEAV32@@Z
+    ?In@Time@absl@@QEBA?AUBreakdown@12@VTimeZone@2@@Z
+    ?InMillisecondsFromNow@KernelTimeout@synchronization_internal@absl@@AEBAKXZ
+    ?Increment@RefcountAndFlags@cord_internal@absl@@QEAAXXZ
+    ?IncrementSynchSem@Mutex@absl@@CAXPEAV12@PEAUPerThreadSynch@base_internal@2@@Z
+    ?IndexBefore@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@U4123@_K@Z
+    ?IndexBeyond@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@_K@Z
+    ?IndexOf@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@_K@Z
+    ?IndexOfLength@CordRepBtree@cord_internal@absl@@AEBA?AUPosition@123@_K@Z
+    ?InfiniteDuration@absl@@YA?AVDuration@1@XZ
+    ?InfiniteFuture@absl@@YA?AVTime@1@XZ
+    ?InfinitePast@absl@@YA?AVTime@1@XZ
+    ?Init@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@PEAVCordRepBtree@23@@Z
+    ?Init@PerThreadSem@synchronization_internal@absl@@CAXPEAUThreadIdentity@base_internal@3@@Z
+    ?InitDiscreteDistribution@random_internal@absl@@YA?AV?$vector@U?$pair@N_K@Cr@std@@V?$allocator@U?$pair@N_K@Cr@std@@@23@@Cr@std@@PEAV?$vector@NV?$allocator@N@Cr@std@@@45@@Z
+    ?InitFirst@CordRepBtreeNavigator@cord_internal@absl@@QEAAPEAUCordRep@23@PEAVCordRepBtree@23@@Z
+    ?InitFrom@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXAEBV123@@Z
+    ?InitInstance@CordRepBtree@cord_internal@absl@@AEAAXH_K0@Z
+    ?InitTree@ChunkIterator@Cord@absl@@AEAAXPEAUCordRep@cord_internal@3@@Z
+    ?InitWhat@BadStatusOrAccess@absl@@AEBAXXZ
+    ?Initialize@ExponentialBiased@profiling_internal@absl@@AEAAXXZ
+    ?Initialize@LogEntryStreambuf@log_internal@absl@@AEAAXXZ
+    ?InitializeCordRepExternal@cord_internal@absl@@YAXVstring_view@2@PEAUCordRepExternal@12@@Z
+    ?InitializeSymbolizer@absl@@YAXPEBD@Z
+    ?InlinedRepToCode@Status@absl@@CA?AW4StatusCode@2@_K@Z
+    ?InsertEdge@GraphCycles@synchronization_internal@absl@@QEAA_NUGraphId@23@0@Z
+    ?InstallFailureSignalHandler@absl@@YAXAEBUFailureSignalHandlerOptions@1@@Z
+    ?Int128High64@absl@@YA_JVint128@1@@Z
+    ?Int128Low64@absl@@YA_KVint128@1@@Z
+    ?Int128Max@absl@@YA?AVint128@1@XZ
+    ?Int128Min@absl@@YA?AVint128@1@XZ
+    ?InternalAttemptToUseMutexInFatalSignalHandler@Mutex@absl@@SAXXZ
+    ?InternalCondVarPoke@Waiter@synchronization_internal@absl@@AEAAXXZ
+    ?InternalError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InternalStream@LogMessage@log_internal@absl@@QEAAAEAV123@XZ
+    ?InvalidArgumentError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InvalidGraphId@synchronization_internal@absl@@YA?AUGraphId@12@XZ
+    ?IsAborted@absl@@YA_NAEBVStatus@1@@Z
+    ?IsAlreadyExists@absl@@YA_NAEBVStatus@1@@Z
+    ?IsBtree@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsCancelled@absl@@YA_NAEBVStatus@1@@Z
+    ?IsCooperative@SpinLock@base_internal@absl@@CA_NW4SchedulingMode@23@@Z
+    ?IsCrc@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsDataEdge@cord_internal@absl@@YA_NPEBUCordRep@12@@Z
+    ?IsDataLoss@absl@@YA_NAEBVStatus@1@@Z
+    ?IsDeadlineExceeded@absl@@YA_NAEBVStatus@1@@Z
+    ?IsEmpty@Queue@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?IsExternal@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsFailedPrecondition@absl@@YA_NAEBVStatus@1@@Z
+    ?IsFatal@LogMessage@log_internal@absl@@AEBA_NXZ
+    ?IsFlat@CordRep@cord_internal@absl@@QEBA_NXZ
+    ?IsFlat@CordRepBtree@cord_internal@absl@@QEBA_NPEAVstring_view@3@@Z
+    ?IsFlat@CordRepBtree@cord_internal@absl@@QEBA_N_K0PEAVstring_view@3@@Z
+    ?IsHashtablezEnabled@container_internal@absl@@YA_NXZ
+    ?IsImmortal@RefcountAndFlags@cord_internal@absl@@QEBA_NXZ
+    ?IsInfiniteDuration@time_internal@absl@@YA_NVDuration@2@@Z
+    ?IsInitialized@log_internal@absl@@YA_NXZ
+    ?IsInlined@Status@absl@@CA_N_K@Z
+    ?IsInternal@absl@@YA_NAEBVStatus@1@@Z
+    ?IsInvalidArgument@absl@@YA_NAEBVStatus@1@@Z
+    ?IsMovedFrom@Status@absl@@CA_N_K@Z
+    ?IsNotFound@absl@@YA_NAEBVStatus@1@@Z
+    ?IsOne@RefcountAndFlags@cord_internal@absl@@QEAA_NXZ
+    ?IsOutOfRange@absl@@YA_NAEBVStatus@1@@Z
+    ?IsPermissionDenied@absl@@YA_NAEBVStatus@1@@Z
+    ?IsPow2@CordBuffer@absl@@CA_N_K@Z
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+    ?MaxFramesInLogStackTrace@log_internal@absl@@YAHXZ
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+    ?ReadDigits@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAHPEBD0H@Z
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+    ?ReaderTryLock@Mutex@absl@@QEAA_NXZ
+    ?ReaderUnlock@Mutex@absl@@QEAAXXZ
+    ?Rebuild@CordRepBtree@cord_internal@absl@@CAXPEAPEAV123@PEAV123@_N@Z
+    ?Rebuild@CordRepBtree@cord_internal@absl@@SAPEAV123@PEAV123@@Z
+    ?RecordInsertSlow@container_internal@absl@@YAXPEAUHashtablezInfo@12@_K1@Z
+    ?Ref@CordRep@cord_internal@absl@@SAPEAU123@PEAU123@@Z
+    ?Ref@Status@absl@@CAX_K@Z
+    ?RefCordRep@CordzInfo@cord_internal@absl@@QEBAPEAUCordRep@23@XZ
+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPEBDH000@Z@Z
+    ?RegisterCondVarTracer@absl@@YAXP6AXPEBDPEBX@Z@Z
+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQEBQEAXHP6AXPEBDPEAX@Z2@Z@Z
+    ?RegisterInternalLogFunction@raw_log_internal@absl@@YAXP6AXW4LogSeverity@2@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?RegisterLogFilterAndPrefixHook@raw_log_internal@absl@@YAXP6A_NW4LogSeverity@2@PEBDHPEAPEADPEAH@Z@Z
+    ?RegisterMutexProfiler@absl@@YAXP6AX_J@Z@Z
+    ?RegisterMutexTracer@absl@@YAXP6AXPEBDPEBX_J@Z@Z
+    ?RegisterSpinLockProfiler@base_internal@absl@@YAXP6AXPEBX_J@Z@Z
+    ?RegisterSymbolizer@absl@@YAXP6A_NPEBXPEADH@Z@Z
+    ?Release@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEHAA?AU?$Allocation@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@23@XZ
+    ?Release@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEHAA?AU?$Allocation@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@23@XZ
+    ?Release@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEHAA?AU?$Allocation@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@23@XZ
+    ?Release@ReleasableMutexLock@absl@@QEAAXXZ
+    ?Remove@CondVar@absl@@AEAAXPEAUPerThreadSynch@base_internal@2@@Z
+    ?RemoveChunkPrefix@ChunkIterator@Cord@absl@@AEAAX_K@Z
+    ?RemoveCrcNode@cord_internal@absl@@YAPEAUCordRep@12@PEAU312@@Z
+    ?RemoveEdge@GraphCycles@synchronization_internal@absl@@QEAAXUGraphId@23@0@Z
+    ?RemoveExtraAsciiWhitespace@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?RemoveLogSink@log_internal@absl@@YAXPEAVLogSink@2@@Z
+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QEAAXPEAX@Z
+    ?RemovePrefix@Cord@absl@@QEAAX_K@Z
+    ?RemovePrefix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?RemoveSuffix@Cord@absl@@QEAAX_K@Z
+    ?RemoveSuffix@CordRepBtree@cord_internal@absl@@SAPEAUCordRep@23@PEAV123@_K@Z
+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?RepToPointer@Status@absl@@CAPEAUStatusRep@status_internal@2@_K@Z
+    ?Reset@?$AllocationTransaction@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAXXZ
+    ?Reset@?$AllocationTransaction@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAXXZ
+    ?Reset@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAXXZ
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NAEBV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?ResetToEmpty@InlineRep@Cord@absl@@AEAAXXZ
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPEAUCordRep@12@V?$FunctionRef@$$A6AXPEAUCordRep@cord_internal@absl@@_K1@Z@2@@Z
+    ?RoundUp@cord_internal@absl@@YA_K_K0@Z
+    ?RoundUpForTag@cord_internal@absl@@YA_K_K@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?SampleSlow@container_internal@absl@@YAPEAUHashtablezInfo@12@AEAUSamplingState@12@_K@Z
+    ?Seek@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AEAAXXZ
+    ?SetAllocation@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXU?$Allocation@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@23@@Z
+    ?SetAllocation@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXU?$Allocation@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@23@@Z
+    ?SetAllocation@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXU?$Allocation@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@23@@Z
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QEAAX_K@Z
+    ?SetConversionChar@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXW4FormatConversionChar@3@PEAVFormatConversionSpecImpl@23@@Z
+    ?SetCordRep@CordzInfo@cord_internal@absl@@QEAAXPEAUCordRep@23@@Z
+    ?SetCordRep@CordzUpdateScope@cord_internal@absl@@QEBAXPEAUCordRep@23@@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPEAUThreadIdentity@12@P6AXPEAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QEAAXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IEAAXXZ
+    ?SetFlags@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXW4Flags@23@PEAVFormatConversionSpecImpl@23@@Z
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetInlinedSize@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SetIsAllocated@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXXZ
+    ?SetIsAllocated@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXXZ
+    ?SetIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAXXZ
+    ?SetLength@CordBuffer@absl@@QEAAX_K@Z
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMaxSamples@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAAX_K@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QEAAXVstring_view@2@VCord@2@@Z
+    ?SetPrecision@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXHPEAVFormatConversionSpecImpl@23@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPEAPEAXPEAHHHPEBX1@Z@Z
+    ?SetStatusPayloadPrinter@status_internal@absl@@YAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@AEBVCord@2@@Z@Z
+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPEAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QEAAXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXXZ
+    ?SetTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@AEBVCordzUpdateScope@53@@Z
+    ?SetTreeOrEmpty@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@AEBVCordzUpdateScope@53@@Z
+    ?SetValue@?$Manager@D$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBD@Z
+    ?SetValue@?$Manager@H$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBH@Z
+    ?SetValue@?$Manager@I$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBI@Z
+    ?SetValue@?$Manager@Vstring_view@absl@@$0A@@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEBVstring_view@4@@Z
+    ?SetValue@?$Manager@_J$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AEB_J@Z
+    ?SetWidth@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXHPEAVFormatConversionSpecImpl@23@@Z
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?ShouldInsertBackwards@container_internal@absl@@YA_N_KPEBW4ctrl_t@12@@Z
+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QEAA_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QEAA_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QEAAXXZ
+    ?SignalAll@CondVar@absl@@QEAAXXZ
+    ?SignedAddResult@int128_internal@absl@@YA?AVint128@2@V32@0@Z
+    ?SignedSubstructResult@int128_internal@absl@@YA?AVint128@2@V32@00@Z
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PEA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PEAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PEAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YA_KNPEAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?SkipCrcNode@cord_internal@absl@@YAPEAUCordRep@12@PEAU312@@Z
+    ?SkipCrcNode@cord_internal@absl@@YAPEBUCordRep@12@PEBU312@@Z
+    ?SleepFor@absl@@YAXVDuration@1@@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AEAAXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AEAAXI@Z
+    ?SnprintF@str_format_internal@absl@@YAHPEAD_KVUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SpinLockDelay@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@IHW4SchedulingMode@12@@Z
+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPEAU?$atomic@I@Cr@std@@HQEBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
+    ?SpinLockWake@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@_N@Z
+    ?SpinLoop@SpinLock@base_internal@absl@@AEAAIXZ
+    ?StackTraceWorksForTest@debugging_internal@absl@@YA_NXZ
+    ?StartsWith@absl@@YA_NVstring_view@1@0@Z
+    ?StartsWithIgnoreCase@absl@@YA_NVstring_view@1@0@Z
+    ?StatusCodeToString@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusCode@1@@Z
+    ?StderrThreshold@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?Store@?$AtomicHook@P6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@absl@@Vstring_view@2@AEBVCord@2@@Z@base_internal@absl@@QEAAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@3@Vstring_view@3@AEBVCord@3@@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBDH000@Z@base_internal@absl@@QEAAXP6AXPEBDH000@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBDPEBX@Z@base_internal@absl@@QEAAXP6AXPEBDPEBX@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBDPEBX_J@Z@base_internal@absl@@QEAAXP6AXPEBDPEBX_J@Z@Z
+    ?Store@?$AtomicHook@P6AXPEBX_J@Z@base_internal@absl@@QEAAXP6AXPEBX_J@Z@Z
+    ?Store@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEAAXP6AXW4LogSeverity@3@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?Store@?$AtomicHook@P6AXXZ@base_internal@absl@@QEAAXP6AXXZ@Z
+    ?Store@?$AtomicHook@P6AX_J@Z@base_internal@absl@@QEAAXP6AX_J@Z@Z
+    ?Store@?$AtomicHook@P6A_NPEBXPEADH@Z@base_internal@absl@@QEAAXP6A_NPEBXPEADH@Z@Z
+    ?Store@?$AtomicHook@P6A_NW4LogSeverity@absl@@PEBDHPEAPEADPEAH@Z@base_internal@absl@@QEAAXP6A_NW4LogSeverity@3@PEBDHPEAPEADPEAH@Z@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@111@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@11@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@1@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@000@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@00@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@0@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@@Z
+    ?StrError@base_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@H@Z
+    ?StrReplaceAll@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ?StrReplaceAll@absl@@YAHV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@3@@Z
+    ?StripAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StripLeadingAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StripTrailingAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StrlenInternal@string_view@absl@@CA_KPEBD@Z
+    ?SubLength@CordRepRing@cord_internal@absl@@AEAAXI_K@Z
+    ?SubRing@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K11@Z
+    ?SubTree@CordRepBtree@cord_internal@absl@@QEAAPEAUCordRep@23@_K0@Z
+    ?Subcord@Cord@absl@@QEBA?AV12@_K0@Z
+    ?SubstituteAndAppendArray@substitute_internal@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@2@PEBV62@_K@Z
+    ?Substring@CordRepSubstring@cord_internal@absl@@SAPEAUCordRep@23@PEAU423@_K1@Z
+    ?SubstructResult@int128_internal@absl@@YA?AVuint128@2@V32@00@Z
+    ?SubtractSize@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SubtractSize@?$Storage@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SubtractSize@?$Storage@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?SubtractSize@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAX_K@Z
+    ?Summarize@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SuppressSigabortTrace@log_internal@absl@@YA_NXZ
+    ?Symbolize@absl@@YA_NPEBXPEADH@Z
+    ?TagToAllocatedSize@cord_internal@absl@@YA_KE@Z
+    ?TagToLength@cord_internal@absl@@YA_KE@Z
+    ?TakeRep@Cord@absl@@AEGBAPEAUCordRep@cord_internal@2@XZ
+    ?TakeRep@Cord@absl@@AEHAAPEAUCordRep@cord_internal@2@XZ
+    ?ThreadIsLoggingToLogSink@log_internal@absl@@YA_NXZ
+    ?ThrowBadStatusOrAccess@internal_statusor@absl@@YAXVStatus@2@@Z
+    ?ThrowBadVariantAccess@variant_internal@absl@@YAXXZ
+    ?ThrowSeedGenException@random_internal@absl@@YAXXZ
+    ?ThrowStdBadAlloc@base_internal@absl@@YAXXZ
+    ?ThrowStdBadFunctionCall@base_internal@absl@@YAXXZ
+    ?ThrowStdDomainError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdDomainError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPEBD@Z
+    ?Tick@PerThreadSem@synchronization_internal@absl@@SAXPEAUThreadIdentity@base_internal@3@@Z
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+    ?from_chars@absl@@YA?AUfrom_chars_result@1@PEBD0AEANW4chars_format@1@@Z
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+    ?front@string_view@absl@@QEBAAEBDXZ
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+    ?gbswap_32@absl@@YAII@Z
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+    ?get@?$Storage@PEAPEAVLogSink@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEGAAAEAPEAPEAVLogSink@4@XZ
+    ?get@?$Storage@PEAUPayload@status_internal@absl@@$00$0A@@internal_compressed_tuple@container_internal@absl@@QEGAAAEAPEAUPayload@status_internal@4@XZ
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+    ?reset@?$unique_ptr@UThreadIdentity@base_internal@absl@@P6AXPEAX@Z@Cr@std@@QEAAXPEAUThreadIdentity@base_internal@absl@@@Z
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+    ?retreat@CordRepRing@cord_internal@absl@@QEBAII@Z
+    ?retreat@CordRepRing@cord_internal@absl@@QEBAIII@Z
+    ?rfind@string_view@absl@@QEBA_KD_K@Z
+    ?rfind@string_view@absl@@QEBA_KV12@_K@Z
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+    ?safe_strto64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_JH@Z
+    ?safe_strtou128_base@numbers_internal@absl@@YA_NVstring_view@2@PEAVuint128@2@H@Z
+    ?safe_strtou32_base@numbers_internal@absl@@YA_NVstring_view@2@PEAIH@Z
+    ?safe_strtou64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_KH@Z
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+    ?second@?$__compressed_pair@PEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEBAAEBV?$allocator@VFormatArgImpl@str_format_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVTimeZoneIf@cctz@time_internal@absl@@U?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVTimeZoneInfo@cctz@time_internal@absl@@U?$default_delete@VTimeZoneInfo@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@VTimeZoneInfo@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEAVZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PEBVImpl@time_zone@cctz@time_internal@absl@@U?$default_delete@$$CBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAU?$default_delete@$$CBVImpl@time_zone@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@U?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@23@@Cr@std@@QEAAAEAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@23@XZ
+    ?second@?$__compressed_pair@_KV?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@Cr@std@@@Cr@std@@QEAAAEAV?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@XZ
+    ?second@?$__compressed_pair@_KV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEAAAEAV?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@23@XZ
+    ?second@?$__compressed_pair@_KV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAAEAV?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@XZ
+    ?second@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBAHXZ
+    ?second@?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBAHXZ
+    ?set_arg@BoundConversion@str_format_internal@absl@@QEAAXPEBVFormatArgImpl@23@@Z
+    ?set_begin@CordRepBtree@cord_internal@absl@@AEAAX_K@Z
+    ?set_conversion_char@FormatConversionSpecImpl@str_format_internal@absl@@QEAAXW4FormatConversionChar@3@@Z
+    ?set_cordz_info@InlineData@cord_internal@absl@@QEAAXPEAVCordzInfo@23@@Z
+    ?set_cordz_mean_interval@cord_internal@absl@@YAXH@Z
+    ?set_data@InlineRep@Cord@absl@@QEAAPEAD_K@Z
+    ?set_data@InlineRep@Cord@absl@@QEAAXPEBD_K@Z
+    ?set_end@CordRepBtree@cord_internal@absl@@AEAAX_K@Z
+    ?set_from_arg@InputValue@UnboundConversion@str_format_internal@absl@@QEAAXH@Z
+    ?set_inline_size@InlineData@cord_internal@absl@@QEAAX_K@Z
+    ?set_inline_size@InlineRep@Cord@absl@@AEAAX_K@Z
+    ?set_short_length@Rep@CordBuffer@absl@@QEAAX_K@Z
+    ?set_tree@InlineData@cord_internal@absl@@QEAAXPEAUCordRep@23@@Z
+    ?set_value@InputValue@UnboundConversion@str_format_internal@absl@@QEAAXH@Z
+    ?shrink_to_fit@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ?size@?$BigUnsigned@$03@strings_internal@absl@@QEBAHXZ
+    ?size@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAHXZ
+    ?size@?$InlinedVector@H$0CP@V?$allocator@H@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@PEAUCordRep@cord_internal@absl@@$01V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@PEAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PEAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QEBA_KXZ
+    ?size@?$Span@$$CBD@absl@@QEBA_KXZ
+    ?size@?$Span@$$CBI@absl@@QEBA_KXZ
+    ?size@?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@D@absl@@QEBA_KXZ
+    ?size@?$Span@E@absl@@QEBA_KXZ
+    ?size@?$Span@G@absl@@QEBA_KXZ
+    ?size@?$Span@I@absl@@QEBA_KXZ
+    ?size@?$Span@PEAVLogSink@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@QEAUCordRep@cord_internal@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@VFormatArgImpl@str_format_internal@absl@@@absl@@QEBA_KXZ
+    ?size@?$Span@_K@absl@@QEBA_KXZ
+    ?size@?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEAAAEA_KXZ
+    ?size@?$__bucket_list_deallocator@V?$allocator@PEAU?$__hash_node_base@PEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AEAAAEA_KXZ
+    ?size@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$deque@PEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@QEBA_KXZ
+    ?size@?$initializer_list@VFormatArgImpl@str_format_internal@absl@@@std@@QEBA_KXZ
+    ?size@?$initializer_list@W4FormatConversionCharSet@absl@@@std@@QEBA_KXZ
+    ?size@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QEBA_KXZ
+    ?size@AlphaNum@absl@@QEBA_KXZ
+    ?size@Cord@absl@@QEBA_KXZ
+    ?size@CordRepBtree@cord_internal@absl@@QEBA_KXZ
+    ?size@InlineRep@Cord@absl@@QEBA_KXZ
+    ?size@string_view@absl@@QEBA_KXZ
+    ?source_basename@LogEntry@absl@@QEBA?AVstring_view@2@XZ
+    ?source_line@LogEntry@absl@@QEBAHXZ
+    ?stacktrace@LogEntry@absl@@QEBA?AVstring_view@2@XZ
+    ?status@BadStatusOrAccess@absl@@QEBAAEBVStatus@2@XZ
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Uday_tag@1234@U51234@_J@Z
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Usecond_tag@1234@U51234@_J@Z
+    ?store@?$__atomic_base@PEAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@QEAAXPEAVCordzHandle@cord_internal@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@PEAVCordzInfo@cord_internal@absl@@$0A@@Cr@std@@QEAAXPEAVCordzInfo@cord_internal@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@W4OnDeadlockCycle@absl@@$0A@@Cr@std@@QEAAXW4OnDeadlockCycle@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@W4State@PerThreadSynch@base_internal@absl@@$0A@@Cr@std@@QEAAXW4State@PerThreadSynch@base_internal@absl@@W4memory_order@23@@Z
+    ?str@UntypedFormatSpecImpl@str_format_internal@absl@@QEBA?AVstring_view@3@XZ
+    ?sub_fetch_begin@CordRepBtree@cord_internal@absl@@AEAA_K_K@Z
+    ?substr@string_view@absl@@QEBA?AV12@_K0@Z
+    ?substring@CordRep@cord_internal@absl@@QEAAPEAUCordRepSubstring@23@XZ
+    ?substring@CordRep@cord_internal@absl@@QEBAPEBUCordRepSubstring@23@XZ
+    ?tag@InlineData@cord_internal@absl@@AEAAAEACXZ
+    ?tag@InlineData@cord_internal@absl@@AEBACXZ
+    ?tail@CordRepRing@cord_internal@absl@@QEBAIXZ
+    ?text_message_with_prefix_and_newline@LogEntry@absl@@QEBA?AVstring_view@2@XZ
+    ?text_message_with_prefix_and_newline_c_str@LogEntry@absl@@QEBAPEBDXZ
+    ?thread_identity@PerThreadSynch@base_internal@absl@@QEAAPEAUThreadIdentity@23@XZ
+    ?throw_bad_optional_access@optional_internal@absl@@YAXXZ
+    ?tid@LogEntry@absl@@QEBAIXZ
+    ?timestamp@LogEntry@absl@@QEBA?AVTime@2@XZ
+    ?total_written@BufferRawSink@str_format_internal@absl@@QEBA_KXZ
+    ?tree@InlineRep@Cord@absl@@QEBAPEAUCordRep@cord_internal@3@XZ
+    ?utc_time_zone@cctz@time_internal@absl@@YA?AVtime_zone@123@XZ
+    ?value@?$optional@_K@absl@@QEGAAAEA_KXZ
+    ?value@InputValue@UnboundConversion@str_format_internal@absl@@QEBAHXZ
+    ?version@time_zone@cctz@time_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?what@BadStatusOrAccess@absl@@UEBAPEBDXZ
+    ?what@SeedGenException@absl@@UEBAPEBDXZ
+    ?what@bad_optional_access@absl@@UEBAPEBDXZ
+    ?what@bad_variant_access@absl@@UEBAPEBDXZ
+    ?width@FormatConversionSpecImpl@str_format_internal@absl@@QEBAHXZ
+    ?words@?$BigUnsigned@$03@strings_internal@absl@@QEBAPEBIXZ
+    ?words@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAPEBIXZ
+    ?xsputn@LogEntryStreambuf@log_internal@absl@@MEAA_JPEBD_J@Z
+    ?xsputn@Streambuf@OStringStream@strings_internal@absl@@MEAA_JPEBD_J@Z
+    ?year@?$civil_time@Uday_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year@?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year@?$civil_time@Uyear_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QEBA_JXZ
+    ?year_index@impl@detail@cctz@time_internal@absl@@YAH_JC@Z
+    ?ymd_ord@impl@detail@cctz@time_internal@absl@@YA_J_JCC@Z
diff --git a/third_party/abseil-cpp/symbols_x64_rel.def b/third_party/abseil-cpp/symbols_x64_rel.def
new file mode 100644
index 0000000000..42658239ff
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_x64_rel.def
@@ -0,0 +1,1095 @@
+EXPORTS
+    ??$?0AEBVCord@absl@@@?$optional_data_dtor_base@VCord@absl@@$0A@@optional_internal@absl@@IEAA@Uin_place_t@2@AEBVCord@2@@Z
+    ??$?0PEAI@?$SaltedSeedSeq@Vseed_seq@Cr@std@@@random_internal@absl@@QEAA@PEAI0@Z
+    ??$?0V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAA@$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6C@LogMessage@log_internal@absl@@QEAAAEAV012@AEBC@Z
+    ??$?6D@LogMessage@log_internal@absl@@QEAAAEAV012@AEBD@Z
+    ??$?6E@LogMessage@log_internal@absl@@QEAAAEAV012@AEBE@Z
+    ??$?6F@LogMessage@log_internal@absl@@QEAAAEAV012@AEBF@Z
+    ??$?6G@LogMessage@log_internal@absl@@QEAAAEAV012@AEBG@Z
+    ??$?6H@LogMessage@log_internal@absl@@QEAAAEAV012@AEBH@Z
+    ??$?6I@LogMessage@log_internal@absl@@QEAAAEAV012@AEBI@Z
+    ??$?6J@LogMessage@log_internal@absl@@QEAAAEAV012@AEBJ@Z
+    ??$?6K@LogMessage@log_internal@absl@@QEAAAEAV012@AEBK@Z
+    ??$?6M@LogMessage@log_internal@absl@@QEAAAEAV012@AEBM@Z
+    ??$?6N@LogMessage@log_internal@absl@@QEAAAEAV012@AEBN@Z
+    ??$?6PEAX@LogMessage@log_internal@absl@@QEAAAEAV012@AEBQEAX@Z
+    ??$?6PEBX@LogMessage@log_internal@absl@@QEAAAEAV012@AEBQEBX@Z
+    ??$?6V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@LogMessage@log_internal@absl@@QEAAAEAV012@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6Vstring_view@absl@@@LogMessage@log_internal@absl@@QEAAAEAV012@AEBVstring_view@2@@Z
+    ??$?6_J@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_J@Z
+    ??$?6_K@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_K@Z
+    ??$?6_N@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_N@Z
+    ??$?MUsecond_tag@detail@cctz@time_internal@absl@@U01234@@detail@cctz@time_internal@absl@@YA_NAEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@0123@0@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAPEBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAPEBD@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAY0CC@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAY0CC@$$CBD@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAY0CG@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAY0CG@$$CBD@Z
+    ??$AddCordRep@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@PEAUCordRep@12@@Z
+    ??$AddCordRep@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@PEAUCordRep@12@@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@AEAA?AVstring_view@2@V32@_K@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@Vstring_view@2@_K@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@AEAA?AVstring_view@2@V32@_K@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@Vstring_view@2@_K@Z
+    ??$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV012@PEAV012@0_K1@Z
+    ??$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV012@PEAV012@0_K1@Z
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+    ??$AppendImpl@AEBVCord@absl@@@Cord@absl@@AEAAXAEBV01@@Z
+    ??$AppendImpl@VCord@absl@@@Cord@absl@@AEAAX$$QEAV01@@Z
+    ??$Base64EscapeInternal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPEBE_KPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_NPEBD@Z
+    ??$CallOnceImpl@A6AXXZ$$V@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@W4SchedulingMode@01@A6AXXZ@Z
+    ??$CastAndCallFunction@$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@CA_NPEBV01@@Z
+    ??$Compare@$0FE@$0FE@@strings_internal@absl@@YAHAEBV?$BigUnsigned@$0FE@@01@0@Z
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+    ??$Dispatch@C@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@D@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@E@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@F@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@G@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@PEBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$DivMod@$09@?$BigUnsigned@$03@strings_internal@absl@@AEAAIXZ
+    ??$DivMod@$09@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAIXZ
+    ??$EmplaceBack@AEBQEAVLogSink@absl@@@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAVLogSink@2@AEBQEAV32@@Z
+    ??$EmplaceBack@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAUPayload@status_internal@2@$$QEAU342@@Z
+    ??$EmplaceBackSlow@AEBQEAVLogSink@absl@@@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAAEAPEAVLogSink@2@AEBQEAV32@@Z
+    ??$EmplaceBackSlow@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAAEAUPayload@status_internal@2@$$QEAU342@@Z
+    ??$Fill@$00@CordRepRing@cord_internal@absl@@AEAAXPEBV012@II@Z
+    ??$Fill@$0A@@CordRepRing@cord_internal@absl@@AEAAXPEBV012@II@Z
+    ??$FindSubstitutions@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@strings_internal@absl@@YA?AV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@Vstring_view@1@AEBV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ??$Flush@V?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@VBufferRawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@VFILERawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$AddRing@$00@012@CAPEAV012@PEAV012@0_K1@Z@@Z
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+    ??$ForEach@V<lambda_2>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_2>@?0???$AddRing@$0A@@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$FormatConvertImpl@_N$0A@@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@01@_NVFormatConversionSpecImpl@01@PEAVFormatSinkImpl@01@@Z
+    ??$GenericCompare@HVCord@absl@@@absl@@YAHAEBVCord@0@0_K@Z
+    ??$GenericCompare@HVstring_view@absl@@@absl@@YAHAEBVCord@0@AEBVstring_view@0@_K@Z
+    ??$GenericCompare@_NVCord@absl@@@absl@@YA_NAEBVCord@0@0_K@Z
+    ??$GenericCompare@_NVstring_view@absl@@@absl@@YA_NAEBVCord@0@AEBVstring_view@0@_K@Z
+    ??$Merge@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@0@Z
+    ??$Merge@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@0@Z
+    ??$NewImpl@$0BAAA@$$V@CordRepFlat@cord_internal@absl@@SAPEAU012@_K@Z
+    ??$NewImpl@$0EAAAA@$$V@CordRepFlat@cord_internal@absl@@SAPEAU012@_K@Z
+    ??$NewLeaf@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@Vstring_view@2@_K@Z
+    ??$NewLeaf@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@Vstring_view@2@_K@Z
+    ??$ParseFloat@$09@strings_internal@absl@@YA?AUParsedFloat@01@PEBD0W4chars_format@1@@Z
+    ??$ParseFloat@$0BA@@strings_internal@absl@@YA?AUParsedFloat@01@PEBD0W4chars_format@1@@Z
+    ??$ParseFormatString@UParsedFormatConsumer@ParsedFormatBase@str_format_internal@absl@@@str_format_internal@absl@@YA_NVstring_view@1@UParsedFormatConsumer@ParsedFormatBase@01@@Z
+    ??$PopDead@_J_K@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AEAAPEAUHashtablezInfo@container_internal@2@_J_K@Z
+    ??$Prepend@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$Register@AEB_JAEA_K@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAAPEAUHashtablezInfo@container_internal@2@AEB_JAEA_K@Z
+    ??$SNPrintF@DHHH@absl@@YAHPEAD_KAEBV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@0@AEBDAEBH44@Z
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+    ??$SetEdge@$00@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
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+    ?FiveToTheNth@?$BigUnsigned@$0FE@@strings_internal@absl@@SA?AV123@H@Z
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+    ?FlatOverhead@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?FlatTagToLength@CordTestAccess@strings_internal@absl@@SA_KE@Z
+    ?FlattenSlowPath@Cord@absl@@AEAA?AVstring_view@2@XZ
+    ?Floor@absl@@YA?AVDuration@1@V21@0@Z
+    ?Flush@LogMessage@log_internal@absl@@IEAAXXZ
+    ?Flush@LogSink@absl@@UEAAXXZ
+    ?FlushLogSinks@log_internal@absl@@YAXXZ
+    ?ForEachChunkAux@Cord@absl@@CAXPEAUCordRep@cord_internal@2@V?$FunctionRef@$$A6AXVstring_view@absl@@@Z@2@@Z
+    ?ForEachPayload@Status@absl@@QEBAXV?$FunctionRef@$$A6AXVstring_view@absl@@AEBVCord@2@@Z@2@@Z
+    ?ForgetDeadlockInfo@Mutex@absl@@QEAAXXZ
+    ?FormatCivilTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@V?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?FormatCivilTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@V?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?FormatCivilTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@V?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?FormatCivilTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@V?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?FormatCivilTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@V?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?FormatCivilTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@V?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?FormatConversionCharToConvInt@str_format_internal@absl@@YA_KD@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0BPPPL@@12@CVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0BPPPL@@12@DVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
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+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0EAAAA@@12@UVoidPtr@12@VFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0EAAAE@@12@PEBDVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
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+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0IAAAE@@12@Vstring_view@2@VFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPOAA@@12@MVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPOAA@@12@NVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
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+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@FVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@GVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@HVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@IVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@JVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
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+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@_JVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatConvertImpl@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@12@_KVFormatConversionSpecImpl@12@PEAVFormatSinkImpl@12@@Z
+    ?FormatDuration@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VDuration@1@@Z
+    ?FormatLogMessage@log_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4LogSeverity@2@V?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@2@VDuration@2@IVstring_view@2@H3@Z
+    ?FormatLogPrefix@log_internal@absl@@YA_KW4LogSeverity@2@VTime@2@IVstring_view@2@HAEAV?$Span@D@2@@Z
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+    ?FormatTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VTime@1@@Z
+    ?FormatTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VTime@1@VTimeZone@1@@Z
+    ?FormatTime@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@VTime@1@VTimeZone@1@@Z
+    ?FormatUntyped@str_format_internal@absl@@YA_NVFormatRawSinkImpl@12@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?FprintF@str_format_internal@absl@@YAHPEAU_iobuf@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?Frequency@UnscaledCycleClock@base_internal@absl@@CANXZ
+    ?FromChrono@absl@@YA?AVTime@1@AEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@234@@chrono@Cr@std@@@Z
+    ?FromTM@absl@@YA?AVTime@1@AEBUtm@@VTimeZone@1@@Z
+    ?FromUDate@absl@@YA?AVTime@1@N@Z
+    ?FromUniversal@absl@@YA?AVTime@1@_J@Z
+    ?Generate@?$RandenPool@E@random_internal@absl@@KAEXZ
+    ?Generate@?$RandenPool@G@random_internal@absl@@KAGXZ
+    ?Generate@?$RandenPool@I@random_internal@absl@@KAIXZ
+    ?Generate@?$RandenPool@_K@random_internal@absl@@KA_KXZ
+    ?Generate@RandenHwAes@random_internal@absl@@SAXPEBXPEAX@Z
+    ?Generate@RandenSlow@random_internal@absl@@SAXPEBXPEAX@Z
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+    ?GetAppendBuffer@CordRepRing@cord_internal@absl@@QEAA?AV?$Span@D@3@_K@Z
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+    ?GetAppendBufferSlowPath@Cord@absl@@AEAA?AVCordBuffer@2@_K00@Z
+    ?GetCachedTID@base_internal@absl@@YAIXZ
+    ?GetCharacter@CordRepBtree@cord_internal@absl@@QEBAD_K@Z
+    ?GetCharacter@CordRepRing@cord_internal@absl@@QEBAD_K@Z
+    ?GetCordzStatistics@CordzInfo@cord_internal@absl@@QEBA?AUCordzStatistics@23@XZ
+    ?GetCurrentTimeNanos@absl@@YA_JXZ
+    ?GetDebugStackTraceHook@debugging_internal@absl@@YAP6AXQEBQEAXHP6AXPEBDPEAX@Z2@ZXZ
+    ?GetEstimatedFairShareMemoryUsage@cord_internal@absl@@YA_KPEBUCordRep@12@@Z
+    ?GetEstimatedMemoryUsage@cord_internal@absl@@YA_KPEBUCordRep@12@@Z
+    ?GetFlatAux@Cord@absl@@CA_NPEAUCordRep@cord_internal@2@PEAVstring_view@2@@Z
+    ?GetHashtablezMaxSamples@container_internal@absl@@YA_KXZ
+    ?GetHashtablezSampleParameter@container_internal@absl@@YAHXZ
+    ?GetId@GraphCycles@synchronization_internal@absl@@QEAA?AUGraphId@23@PEAX@Z
+    ?GetKeys@RandenHwAes@random_internal@absl@@SAPEBXXZ
+    ?GetKeys@RandenSlow@random_internal@absl@@SAPEBXXZ
+    ?GetParentMethod@CordzInfo@cord_internal@absl@@CA?AW4MethodIdentifier@CordzUpdateTracker@23@PEBV123@@Z
+    ?GetParentStack@CordzInfo@cord_internal@absl@@QEBA?AV?$Span@QEAX@3@XZ
+    ?GetPayload@Status@absl@@QEBA?AV?$optional@VCord@absl@@@2@Vstring_view@2@@Z
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+    ?GetProgramCounter@debugging_internal@absl@@YAPEAXQEAX@Z
+    ?GetSaltMaterial@random_internal@absl@@YA?AV?$optional@I@2@XZ
+    ?GetSkipCount@ExponentialBiased@profiling_internal@absl@@QEAA_J_J@Z
+    ?GetStack@CordzInfo@cord_internal@absl@@QEBA?AV?$Span@QEAX@3@XZ
+    ?GetStackFrames@absl@@YAHPEAPEAXPEAHHH@Z
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+    ?GetStackTrace@GraphCycles@synchronization_internal@absl@@QEAAHUGraphId@23@PEAPEAPEAX@Z
+    ?GetStackTrace@absl@@YAHPEAPEAXHH@Z
+    ?GetStackTraceWithContext@absl@@YAHPEAPEAXHHPEBXPEAH@Z
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+    ?GetStride@ExponentialBiased@profiling_internal@absl@@QEAA_J_J@Z
+    ?GetTID@base_internal@absl@@YAIXZ
+    ?GetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAPEAU?$atomic@H@Cr@std@@XZ
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+    ?GetWord@?$BigUnsigned@$03@strings_internal@absl@@QEBAIH@Z
+    ?GetWord@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAIH@Z
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+    ?GuaranteedEqual@Condition@absl@@SA_NPEBV12@0@Z
+    ?HandleInvalidStatusCtorArg@Helper@internal_statusor@absl@@SAXPEAVStatus@3@@Z
+    ?HasBeenNotifiedInternal@Notification@absl@@CA_NPEBU?$atomic@_N@Cr@std@@@Z
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+    ?HasNode@GraphCycles@synchronization_internal@absl@@QEAA_NUGraphId@23@@Z
+    ?HasRandenHwAesImplementation@random_internal@absl@@YA_NXZ
+    ?Head@CordzInfo@cord_internal@absl@@SAPEAV123@AEBVCordzSnapshot@23@@Z
+    ?HexStringToBytes@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?IDivDuration@time_internal@absl@@YA_J_NVDuration@2@1PEAV32@@Z
+    ?In@Time@absl@@QEBA?AUBreakdown@12@VTimeZone@2@@Z
+    ?InMillisecondsFromNow@KernelTimeout@synchronization_internal@absl@@AEBAKXZ
+    ?IncrementSynchSem@Mutex@absl@@CAXPEAV12@PEAUPerThreadSynch@base_internal@2@@Z
+    ?Init@PerThreadSem@synchronization_internal@absl@@CAXPEAUThreadIdentity@base_internal@3@@Z
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+    ?InitWhat@BadStatusOrAccess@absl@@AEBAXXZ
+    ?Initialize@ExponentialBiased@profiling_internal@absl@@AEAAXXZ
+    ?Initialize@LogEntryStreambuf@log_internal@absl@@AEAAXXZ
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+    ?InitializeSymbolizer@absl@@YAXPEBD@Z
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+    ?InternalAttemptToUseMutexInFatalSignalHandler@Mutex@absl@@SAXXZ
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+    ?InternalError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InvalidArgumentError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?IsAborted@absl@@YA_NAEBVStatus@1@@Z
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+    ?IsFailedPrecondition@absl@@YA_NAEBVStatus@1@@Z
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+    ?IsPermissionDenied@absl@@YA_NAEBVStatus@1@@Z
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+    ?IsResourceExhausted@absl@@YA_NAEBVStatus@1@@Z
+    ?IsUnauthenticated@absl@@YA_NAEBVStatus@1@@Z
+    ?IsUnavailable@absl@@YA_NAEBVStatus@1@@Z
+    ?IsUnimplemented@absl@@YA_NAEBVStatus@1@@Z
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+    ?KeyFunction@LogSink@absl@@EEBAXXZ
+    ?LengthModToString@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4LengthMod@12@@Z
+    ?LengthToTag@CordTestAccess@strings_internal@absl@@SAE_K@Z
+    ?Load@TimeZoneIf@cctz@time_internal@absl@@SA?AV?$unique_ptr@VTimeZoneIf@cctz@time_internal@absl@@U?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@67@@Z
+    ?Load@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NPEAVZoneInfoSource@234@@Z
+    ?Load@TimeZoneInfo@cctz@time_internal@absl@@QEAA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?LoadTimeZone@Impl@time_zone@cctz@time_internal@absl@@SA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAV2345@@Z
+    ?LocalTime@TimeZoneInfo@cctz@time_internal@absl@@AEBA?AUabsolute_lookup@time_zone@234@_JAEBUTransition@234@@Z
+    ?LocalTime@TimeZoneInfo@cctz@time_internal@absl@@AEBA?AUabsolute_lookup@time_zone@234@_JAEBUTransitionType@234@@Z
+    ?Lock@CordzInfo@cord_internal@absl@@QEAAXW4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?Lock@Mutex@absl@@QEAAXXZ
+    ?LockSlow@Mutex@absl@@AEAAXPEBUMuHowS@2@PEBVCondition@2@H@Z
+    ?LockSlowLoop@Mutex@absl@@AEAAXPEAUSynchWaitParams@2@H@Z
+    ?LockSlowWithDeadline@Mutex@absl@@AEAA_NPEBUMuHowS@2@PEBVCondition@2@VKernelTimeout@synchronization_internal@2@H@Z
+    ?LockWhen@Mutex@absl@@QEAAXAEBVCondition@2@@Z
+    ?LockWhenWithDeadline@Mutex@absl@@QEAA_NAEBVCondition@2@VTime@2@@Z
+    ?LockWhenWithTimeout@Mutex@absl@@QEAA_NAEBVCondition@2@VDuration@2@@Z
+    ?LogBacktraceIfNeeded@LogMessage@log_internal@absl@@AEAAXXZ
+    ?LogFatalNodeType@cord_internal@absl@@YAXPEAUCordRep@12@@Z
+    ?LogToSinks@log_internal@absl@@YAXAEBVLogEntry@2@V?$Span@PEAVLogSink@absl@@@2@_N@Z
+    ?LowLevelHash@hash_internal@absl@@YA_KPEBX_K1QEB_K@Z
+    ?LowLevelHashImpl@MixingHashState@hash_internal@absl@@CA_KPEBE_K@Z
+    ?MakeCheckFailString@status_internal@absl@@YAPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVStatus@2@PEBD@Z
+    ?MakeSeedSeq@absl@@YA?AV?$SaltedSeedSeq@Vseed_seq@Cr@std@@@random_internal@1@XZ
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+    ?MakeTime@TimeZoneLibC@cctz@time_internal@absl@@UEBA?AUcivil_lookup@time_zone@234@AEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@234@@Z
+    ?MapToLocalCode@status_internal@absl@@YA?AW4StatusCode@2@H@Z
+    ?MatchesConversions@ParsedFormatBase@str_format_internal@absl@@AEBA_N_NV?$initializer_list@W4FormatConversionCharSet@absl@@@std@@@Z
+    ?MaxFlatLength@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?MaxFramesInLogStackTrace@log_internal@absl@@YAHXZ
+    ?MaybeTrackCordImpl@CordzInfo@cord_internal@absl@@CAXAEAVInlineData@23@AEBV423@W4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?MergeTrees@CordRepBtree@cord_internal@absl@@CAPEAV123@PEAV123@0@Z
+    ?MinLogLevel@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?MixIntoSeedMaterial@random_internal@absl@@YAXV?$Span@$$CBI@2@V?$Span@I@2@@Z
+    ?MovedFromString@Status@absl@@CAPEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?MultiplyBy@?$BigUnsigned@$03@strings_internal@absl@@AEAAXHPEBI@Z
+    ?MultiplyBy@?$BigUnsigned@$03@strings_internal@absl@@QEAAXI@Z
+    ?MultiplyBy@?$BigUnsigned@$03@strings_internal@absl@@QEAAX_K@Z
+    ?MultiplyBy@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAXHPEBI@Z
+    ?MultiplyBy@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXI@Z
+    ?MultiplyBy@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAX_K@Z
+    ?MultiplyByFiveToTheNth@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyByFiveToTheNth@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyByTenToTheNth@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyByTenToTheNth@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?MultiplyStep@?$BigUnsigned@$03@strings_internal@absl@@AEAAXHPEBIHH@Z
+    ?MultiplyStep@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAXHPEBIHH@Z
+    ?Mutable@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@_K@Z
+    ?MutexDelay@synchronization_internal@absl@@YAHHH@Z
+    ?New@CordRepCrc@cord_internal@absl@@SAPEAU123@PEAUCordRep@23@I@Z
+    ?New@CordRepRing@cord_internal@absl@@CAPEAV123@_K0@Z
+    ?NewArena@LowLevelAlloc@base_internal@absl@@SAPEAUArena@123@I@Z
+    ?Next@CordzInfo@cord_internal@absl@@QEBAPEAV123@AEBVCordzSnapshot@23@@Z
+    ?NextTransition@TimeZone@absl@@QEBA_NVTime@2@PEAUCivilTransition@12@@Z
+    ?NextTransition@TimeZoneInfo@cctz@time_internal@absl@@UEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@time_zone@234@@Z
+    ?NextTransition@TimeZoneLibC@cctz@time_internal@absl@@UEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@time_zone@234@@Z
+    ?NoPrefix@LogMessage@log_internal@absl@@QEAAAEAV123@XZ
+    ?NominalCPUFrequency@base_internal@absl@@YANXZ
+    ?NotFoundError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Notify@Notification@absl@@QEAAXXZ
+    ?Now@CycleClock@base_internal@absl@@SA_JXZ
+    ?Now@absl@@YA?AVTime@1@XZ
+    ?NumCPUs@base_internal@absl@@YAHXZ
+    ?OneTimeInitThreadIdentity@synchronization_internal@absl@@YAXPEAUThreadIdentity@base_internal@2@@Z
+    ?OutOfRangeError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseDuration@absl@@YA_NVstring_view@1@PEAVDuration@1@@Z
+    ?ParseFlag@absl@@YA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAVDuration@1@PEAV234@@Z
+    ?ParseFlag@absl@@YA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAVTime@1@PEAV234@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParsePosixSpec@cctz@time_internal@absl@@YA_NAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEAUPosixTimeZone@123@@Z
+    ?ParseTime@absl@@YA_NVstring_view@1@0PEAVTime@1@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ParseTime@absl@@YA_NVstring_view@1@0VTimeZone@1@PEAVTime@1@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?PermissionDeniedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Poke@Waiter@synchronization_internal@absl@@QEAAXXZ
+    ?Post@Waiter@synchronization_internal@absl@@QEAAXXZ
+    ?PrepareForSampling@HashtablezInfo@container_internal@absl@@QEAAX_J_K@Z
+    ?PrepareToDie@LogMessage@log_internal@absl@@AEAAXXZ
+    ?PrepareToModify@Status@absl@@AEAAXXZ
+    ?Prepend@Cord@absl@@QEAAXAEBV12@@Z
+    ?Prepend@CordRepBtree@cord_internal@absl@@SAPEAV123@PEAV123@Vstring_view@3@_K@Z
+    ?Prepend@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@PEAUCordRep@23@@Z
+    ?Prepend@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@Vstring_view@3@_K@Z
+    ?PrependArray@Cord@absl@@AEAAXVstring_view@2@W4MethodIdentifier@CordzUpdateTracker@cord_internal@2@@Z
+    ?PrependLeaf@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@_K2@Z
+    ?PrependPrecise@Cord@absl@@AEAAXVstring_view@2@W4MethodIdentifier@CordzUpdateTracker@cord_internal@2@@Z
+    ?PrependSlow@CordRepBtree@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@@Z
+    ?PrependSlow@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@@Z
+    ?PrependTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToInlined@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrevTransition@TimeZone@absl@@QEBA_NVTime@2@PEAUCivilTransition@12@@Z
+    ?PrevTransition@TimeZoneInfo@cctz@time_internal@absl@@UEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@time_zone@234@@Z
+    ?PrevTransition@TimeZoneLibC@cctz@time_internal@absl@@UEBA_NAEBV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PEAUcivil_transition@time_zone@234@@Z
+    ?Print@Streamable@str_format_internal@absl@@QEBAAEAV?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@AEAV456@@Z
+    ?Ptr@GraphCycles@synchronization_internal@absl@@QEAAPEAXUGraphId@23@@Z
+    ?PushDead@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AEAAXPEAUHashtablezInfo@container_internal@3@@Z
+    ?PutPaddedString@FormatSinkImpl@str_format_internal@absl@@QEAA_NVstring_view@3@HH_N@Z
+    ?RawEnableLogPrefix@log_internal@absl@@YAX_N@Z
+    ?RawLog@raw_log_internal@absl@@YAXW4LogSeverity@2@PEBDH1ZZ
+    ?RawLoggingFullySupported@raw_log_internal@absl@@YA_NXZ
+    ?RawSetMinLogLevel@log_internal@absl@@YAXW4LogSeverityAtLeast@2@@Z
+    ?RawSetStderrThreshold@log_internal@absl@@YAXW4LogSeverityAtLeast@2@@Z
+    ?Read@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUReadResult@123@_K0@Z
+    ?Read@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K0AEAPEAUCordRep@23@@Z
+    ?ReadDigits@?$BigUnsigned@$03@strings_internal@absl@@AEAAHPEBD0H@Z
+    ?ReadDigits@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAHPEBD0H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$03@strings_internal@absl@@QEAAHAEBUParsedFloat@23@H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAHAEBUParsedFloat@23@H@Z
+    ?ReadSeedMaterialFromOSEntropy@random_internal@absl@@YA_NV?$Span@I@2@@Z
+    ?ReaderLock@Mutex@absl@@QEAAXXZ
+    ?ReaderLockWhen@Mutex@absl@@QEAAXAEBVCondition@2@@Z
+    ?ReaderLockWhenWithDeadline@Mutex@absl@@QEAA_NAEBVCondition@2@VTime@2@@Z
+    ?ReaderLockWhenWithTimeout@Mutex@absl@@QEAA_NAEBVCondition@2@VDuration@2@@Z
+    ?ReaderTryLock@Mutex@absl@@QEAA_NXZ
+    ?ReaderUnlock@Mutex@absl@@QEAAXXZ
+    ?Rebuild@CordRepBtree@cord_internal@absl@@CAXPEAPEAV123@PEAV123@_N@Z
+    ?Rebuild@CordRepBtree@cord_internal@absl@@SAPEAV123@PEAV123@@Z
+    ?RecordInsertSlow@container_internal@absl@@YAXPEAUHashtablezInfo@12@_K1@Z
+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPEBDH000@Z@Z
+    ?RegisterCondVarTracer@absl@@YAXP6AXPEBDPEBX@Z@Z
+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQEBQEAXHP6AXPEBDPEAX@Z2@Z@Z
+    ?RegisterInternalLogFunction@raw_log_internal@absl@@YAXP6AXW4LogSeverity@2@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?RegisterLogFilterAndPrefixHook@raw_log_internal@absl@@YAXP6A_NW4LogSeverity@2@PEBDHPEAPEADPEAH@Z@Z
+    ?RegisterMutexProfiler@absl@@YAXP6AX_J@Z@Z
+    ?RegisterMutexTracer@absl@@YAXP6AXPEBDPEBX_J@Z@Z
+    ?RegisterSpinLockProfiler@base_internal@absl@@YAXP6AXPEBX_J@Z@Z
+    ?RegisterSymbolizer@absl@@YAXP6A_NPEBXPEADH@Z@Z
+    ?Release@ReleasableMutexLock@absl@@QEAAXXZ
+    ?Remove@CondVar@absl@@AEAAXPEAUPerThreadSynch@base_internal@2@@Z
+    ?RemoveEdge@GraphCycles@synchronization_internal@absl@@QEAAXUGraphId@23@0@Z
+    ?RemoveExtraAsciiWhitespace@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?RemoveLogSink@log_internal@absl@@YAXPEAVLogSink@2@@Z
+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QEAAXPEAX@Z
+    ?RemovePrefix@Cord@absl@@QEAAX_K@Z
+    ?RemovePrefix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?RemoveSuffix@Cord@absl@@QEAAX_K@Z
+    ?RemoveSuffix@CordRepBtree@cord_internal@absl@@SAPEAUCordRep@23@PEAV123@_K@Z
+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NAEBV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPEAUCordRep@12@V?$FunctionRef@$$A6AXPEAUCordRep@cord_internal@absl@@_K1@Z@2@@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?SampleSlow@container_internal@absl@@YAPEAUHashtablezInfo@12@AEAUSamplingState@12@_K@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AEAAXXZ
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QEAAX_K@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPEAUThreadIdentity@12@P6AXPEAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QEAAXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IEAAXXZ
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QEAAXVstring_view@2@VCord@2@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPEAPEAXPEAHHHPEBX1@Z@Z
+    ?SetStatusPayloadPrinter@status_internal@absl@@YAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@AEBVCord@2@@Z@Z
+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPEAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QEAAXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXXZ
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?ShouldInsertBackwards@container_internal@absl@@YA_N_KPEBW4ctrl_t@12@@Z
+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QEAA_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QEAA_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QEAAXXZ
+    ?SignalAll@CondVar@absl@@QEAAXXZ
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PEA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PEAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PEAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YA_KNPEAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AEAAXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AEAAXI@Z
+    ?SnprintF@str_format_internal@absl@@YAHPEAD_KVUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPEAU?$atomic@I@Cr@std@@HQEBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
+    ?SpinLoop@SpinLock@base_internal@absl@@AEAAIXZ
+    ?StackTraceWorksForTest@debugging_internal@absl@@YA_NXZ
+    ?StartsWithIgnoreCase@absl@@YA_NVstring_view@1@0@Z
+    ?StatusCodeToString@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusCode@1@@Z
+    ?StderrThreshold@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@111@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@11@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@1@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@000@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@00@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@0@Z
+    ?StrError@base_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@H@Z
+    ?StrReplaceAll@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ?StrReplaceAll@absl@@YAHV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@3@@Z
+    ?SubLength@CordRepRing@cord_internal@absl@@AEAAXI_K@Z
+    ?SubRing@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K11@Z
+    ?SubTree@CordRepBtree@cord_internal@absl@@QEAAPEAUCordRep@23@_K0@Z
+    ?Subcord@Cord@absl@@QEBA?AV12@_K0@Z
+    ?SubstituteAndAppendArray@substitute_internal@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@2@PEBV62@_K@Z
+    ?Summarize@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SuppressSigabortTrace@log_internal@absl@@YA_NXZ
+    ?Symbolize@absl@@YA_NPEBXPEADH@Z
+    ?ThreadIsLoggingToLogSink@log_internal@absl@@YA_NXZ
+    ?ThrowBadStatusOrAccess@internal_statusor@absl@@YAXVStatus@2@@Z
+    ?ThrowBadVariantAccess@variant_internal@absl@@YAXXZ
+    ?ThrowSeedGenException@random_internal@absl@@YAXXZ
+    ?ThrowStdBadAlloc@base_internal@absl@@YAXXZ
+    ?ThrowStdBadFunctionCall@base_internal@absl@@YAXXZ
+    ?ThrowStdDomainError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdDomainError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPEBD@Z
+    ?Tick@PerThreadSem@synchronization_internal@absl@@SAXPEAUThreadIdentity@base_internal@3@@Z
+    ?TimeFromTimespec@absl@@YA?AVTime@1@Utimespec@@@Z
+    ?TimeFromTimeval@absl@@YA?AVTime@1@Utimeval@@@Z
+    ?TimeLocal@TimeZoneInfo@cctz@time_internal@absl@@AEBA?AUcivil_lookup@time_zone@234@AEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@234@_J@Z
+    ?TimeZone@log_internal@absl@@YAPEBV02@XZ
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+    ?reserve@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?reserve@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?reset@?$unique_ptr@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@V?$__hash_node_destructor@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@Cr@std@@@Cr@std@@@23@@Cr@std@@QEAAXPEAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PEAX@23@@Z
+    ?reset@?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@Cr@std@@QEAAXPEAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Z
+    ?resize@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?resize@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAX_K@Z
+    ?rfind@string_view@absl@@QEBA_KD_K@Z
+    ?rfind@string_view@absl@@QEBA_KV12@_K@Z
+    ?safe_strto128_base@numbers_internal@absl@@YA_NVstring_view@2@PEAVint128@2@H@Z
+    ?safe_strto32_base@numbers_internal@absl@@YA_NVstring_view@2@PEAHH@Z
+    ?safe_strto64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_JH@Z
+    ?safe_strtou128_base@numbers_internal@absl@@YA_NVstring_view@2@PEAVuint128@2@H@Z
+    ?safe_strtou32_base@numbers_internal@absl@@YA_NVstring_view@2@PEAIH@Z
+    ?safe_strtou64_base@numbers_internal@absl@@YA_NVstring_view@2@PEA_KH@Z
+    ?set_cordz_mean_interval@cord_internal@absl@@YAXH@Z
+    ?shallow_subcords_enabled@cord_internal@absl@@3U?$atomic@_N@Cr@std@@A
+    ?shrink_to_fit@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXXZ
+    ?size@?$BigUnsigned@$03@strings_internal@absl@@QEBAHXZ
+    ?size@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAHXZ
+    ?size@Cord@absl@@QEBA_KXZ
+    ?status@BadStatusOrAccess@absl@@QEBAAEBVStatus@2@XZ
+    ?throw_bad_optional_access@optional_internal@absl@@YAXXZ
+    ?utc_time_zone@cctz@time_internal@absl@@YA?AVtime_zone@123@XZ
+    ?version@time_zone@cctz@time_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?what@BadStatusOrAccess@absl@@UEBAPEBDXZ
+    ?what@SeedGenException@absl@@UEBAPEBDXZ
+    ?what@bad_optional_access@absl@@UEBAPEBDXZ
+    ?what@bad_variant_access@absl@@UEBAPEBDXZ
+    ?words@?$BigUnsigned@$03@strings_internal@absl@@QEBAPEBIXZ
+    ?words@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAPEBIXZ
+    ?xsputn@LogEntryStreambuf@log_internal@absl@@MEAA_JPEBD_J@Z
+    ?xsputn@Streambuf@OStringStream@strings_internal@absl@@MEAA_JPEBD_J@Z
+    ?ymd_ord@impl@detail@cctz@time_internal@absl@@YA_J_JCC@Z
diff --git a/third_party/abseil-cpp/symbols_x64_rel_asan.def b/third_party/abseil-cpp/symbols_x64_rel_asan.def
new file mode 100644
index 0000000000..f3893e3528
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_x64_rel_asan.def
@@ -0,0 +1,1139 @@
+EXPORTS
+    ??$?0AEBVCord@absl@@@?$optional_data_dtor_base@VCord@absl@@$0A@@optional_internal@absl@@IEAA@Uin_place_t@2@AEBVCord@2@@Z
+    ??$?0V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAA@$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6C@LogMessage@log_internal@absl@@QEAAAEAV012@AEBC@Z
+    ??$?6D@LogMessage@log_internal@absl@@QEAAAEAV012@AEBD@Z
+    ??$?6E@LogMessage@log_internal@absl@@QEAAAEAV012@AEBE@Z
+    ??$?6F@LogMessage@log_internal@absl@@QEAAAEAV012@AEBF@Z
+    ??$?6G@LogMessage@log_internal@absl@@QEAAAEAV012@AEBG@Z
+    ??$?6H@LogMessage@log_internal@absl@@QEAAAEAV012@AEBH@Z
+    ??$?6I@LogMessage@log_internal@absl@@QEAAAEAV012@AEBI@Z
+    ??$?6J@LogMessage@log_internal@absl@@QEAAAEAV012@AEBJ@Z
+    ??$?6K@LogMessage@log_internal@absl@@QEAAAEAV012@AEBK@Z
+    ??$?6M@LogMessage@log_internal@absl@@QEAAAEAV012@AEBM@Z
+    ??$?6N@LogMessage@log_internal@absl@@QEAAAEAV012@AEBN@Z
+    ??$?6PEAX@LogMessage@log_internal@absl@@QEAAAEAV012@AEBQEAX@Z
+    ??$?6PEBX@LogMessage@log_internal@absl@@QEAAAEAV012@AEBQEBX@Z
+    ??$?6V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@LogMessage@log_internal@absl@@QEAAAEAV012@AEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6Vstring_view@absl@@@LogMessage@log_internal@absl@@QEAAAEAV012@AEBVstring_view@2@@Z
+    ??$?6_J@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_J@Z
+    ??$?6_K@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_K@Z
+    ??$?6_N@LogMessage@log_internal@absl@@QEAAAEAV012@AEB_N@Z
+    ??$?MUsecond_tag@detail@cctz@time_internal@absl@@U01234@@detail@cctz@time_internal@absl@@YA_NAEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@0123@0@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAPEBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAPEBD@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAY0CC@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAY0CC@$$CBD@Z
+    ??$?RW4LogSeverity@absl@@AEBQEBDHAEAY0CG@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PEBDHAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QEBAX$$QEAW4LogSeverity@2@AEBQEBD$$QEAHAEAY0CG@$$CBD@Z
+    ??$AddCordRep@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@PEAUCordRep@12@@Z
+    ??$AddCordRep@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@PEAUCordRep@12@@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@AEAA?AVstring_view@2@V32@_K@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@Vstring_view@2@_K@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@AEAA?AVstring_view@2@V32@_K@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@Vstring_view@2@_K@Z
+    ??$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV012@PEAV012@0_K1@Z
+    ??$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV012@PEAV012@0_K1@Z
+    ??$Append@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$AppendImpl@AEBVCord@absl@@@Cord@absl@@AEAAXAEBV01@@Z
+    ??$AppendImpl@VCord@absl@@@Cord@absl@@AEAAX$$QEAV01@@Z
+    ??$Base64EscapeInternal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPEBE_KPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_NPEBD@Z
+    ??$CallOnceImpl@A6AXXZ$$V@base_internal@absl@@YAXPEAU?$atomic@I@Cr@std@@W4SchedulingMode@01@A6AXXZ@Z
+    ??$CastAndCallFunction@$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@CA_NPEBV01@@Z
+    ??$ConstructElements@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$IteratorValueAdapter@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$move_iterator@PEAPEAVLogSink@absl@@@23@@inlined_vector_internal@absl@@@inlined_vector_internal@absl@@YAXAEAV?$allocator@PEAVLogSink@absl@@@Cr@std@@PEAPEAVLogSink@1@AEAV?$IteratorValueAdapter@V?$allocator@PEAVLogSink@absl@@@Cr@std@@V?$move_iterator@PEAPEAVLogSink@absl@@@23@@01@_K@Z
+    ??$Dispatch@C@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@D@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@E@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@F@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@G@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@PEBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$Dispatch@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PEAX@Z
+    ??$DivMod@$09@?$BigUnsigned@$03@strings_internal@absl@@AEAAIXZ
+    ??$DivMod@$09@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAIXZ
+    ??$EmplaceBack@AEBQEAVLogSink@absl@@@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAPEAVLogSink@2@AEBQEAV32@@Z
+    ??$EmplaceBack@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QEAAAEAUPayload@status_internal@2@$$QEAU342@@Z
+    ??$EmplaceBackSlow@AEBQEAVLogSink@absl@@@?$Storage@PEAVLogSink@absl@@$0BA@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAAEAPEAVLogSink@2@AEBQEAV32@@Z
+    ??$EmplaceBackSlow@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AEAAAEAUPayload@status_internal@2@$$QEAU342@@Z
+    ??$Fill@$00@CordRepRing@cord_internal@absl@@AEAAXPEBV012@II@Z
+    ??$Fill@$0A@@CordRepRing@cord_internal@absl@@AEAAXPEBV012@II@Z
+    ??$FindSubstitutions@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@strings_internal@absl@@YA?AV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@Vstring_view@1@AEBV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ??$Flush@V?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@VBufferRawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$Flush@VFILERawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPEAXVstring_view@2@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$AddRing@$00@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$AddRing@$0A@@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$Fill@$00@CordRepRing@cord_internal@absl@@AEAAXPEBV234@II@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$Fill@$00@012@AEAAXPEBV012@II@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$Fill@$0A@@CordRepRing@cord_internal@absl@@AEAAXPEBV234@II@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_1>@?0???$Fill@$0A@@012@AEAAXPEBV012@II@Z@@Z
+    ??$ForEach@V<lambda_2>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_2>@?0???$AddRing@$00@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$ForEach@V<lambda_2>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPEAV234@PEAV234@0_K1@Z@@CordRepRing@cord_internal@absl@@QEBAXII$$QEAV<lambda_2>@?0???$AddRing@$0A@@012@CAPEAV012@PEAV012@0_K1@Z@@Z
+    ??$FormatConvertImpl@_N$0A@@str_format_internal@absl@@YA?AU?$ArgConvertResult@$0JPPPL@@01@_NVFormatConversionSpecImpl@01@PEAVFormatSinkImpl@01@@Z
+    ??$GenericCompare@HVCord@absl@@@absl@@YAHAEBVCord@0@0_K@Z
+    ??$GenericCompare@HVstring_view@absl@@@absl@@YAHAEBVCord@0@AEBVstring_view@0@_K@Z
+    ??$GenericCompare@_NVCord@absl@@@absl@@YA_NAEBVCord@0@0_K@Z
+    ??$GenericCompare@_NVstring_view@absl@@@absl@@YA_NAEBVCord@0@AEBVstring_view@0@_K@Z
+    ??$Merge@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@0@Z
+    ??$Merge@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@PEAV012@0@Z
+    ??$NewImpl@$0BAAA@$$V@CordRepFlat@cord_internal@absl@@SAPEAU012@_K@Z
+    ??$NewImpl@$0EAAAA@$$V@CordRepFlat@cord_internal@absl@@SAPEAU012@_K@Z
+    ??$NewLeaf@$00@CordRepBtree@cord_internal@absl@@CAPEAV012@Vstring_view@2@_K@Z
+    ??$NewLeaf@$0A@@CordRepBtree@cord_internal@absl@@CAPEAV012@Vstring_view@2@_K@Z
+    ??$ParseFloat@$09@strings_internal@absl@@YA?AUParsedFloat@01@PEBD0W4chars_format@1@@Z
+    ??$ParseFloat@$0BA@@strings_internal@absl@@YA?AUParsedFloat@01@PEBD0W4chars_format@1@@Z
+    ??$ParseFormatString@UParsedFormatConsumer@ParsedFormatBase@str_format_internal@absl@@@str_format_internal@absl@@YA_NVstring_view@1@UParsedFormatConsumer@ParsedFormatBase@01@@Z
+    ??$PopDead@_J_K@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AEAAPEAUHashtablezInfo@container_internal@2@_J_K@Z
+    ??$Prepend@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QEAAX$$QEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$Register@AEB_JAEA_K@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QEAAPEAUHashtablezInfo@container_internal@2@AEB_JAEA_K@Z
+    ??$STLStringResizeUninitializedAmortized@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ??$SetEdge@$00@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QEAA?AUOpResult@012@_NPEAUCordRep@12@_K@Z
+    ??$StrFormat@DHHHHH_JIVstring_view@absl@@HV12@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@0@AEBDAEBH2222AEB_JAEBIAEBVstring_view@0@25@Z
+    ??$StrReplaceAll@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@0@AEBV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@3@@Z
+    ??$StrReplaceAll@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@absl@@YAHAEBV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@2@@Z
+    ??$__construct_at_end@PEBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEAAXPEBVFormatArgImpl@str_format_internal@absl@@0_K@Z
+    ??$__construct_at_end@V?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@AEAV?$allocator@PEAPEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAPEAPEBVImpl@time_zone@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransition@cctz@time_internal@absl@@AEAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QEAAXV?$move_iterator@PEAUTransition@cctz@time_internal@absl@@@12@0@Z
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+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByCivilTime@Transition@cctz@time_internal@absl@@PEBU5678@PEBU5678@U5678@U__identity@23@@Cr@std@@YAPEBUTransition@cctz@time_internal@absl@@PEBU2345@0AEBU2345@$$QEAUByCivilTime@2345@$$QEAU__identity@01@@Z
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+    ??$construct_at@UPayload@status_internal@absl@@AEBU123@PEAU123@@Cr@std@@YAPEAUPayload@status_internal@absl@@PEAU234@AEBU234@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@$$VPEAU1234@@Cr@std@@YAPEAUTransition@cctz@time_internal@absl@@PEAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@$$VPEAU1234@@Cr@std@@YAPEAUTransitionType@cctz@time_internal@absl@@PEAU2345@@Z
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+    ?Now@absl@@YA?AVTime@1@XZ
+    ?NumCPUs@base_internal@absl@@YAHXZ
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+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
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+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PEAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
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+    ?PrependLeaf@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@_K2@Z
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+    ?PrependSlow@CordRepRing@cord_internal@absl@@CAPEAV123@PEAV123@PEAUCordRep@23@@Z
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+    ?PrependTreeToInlined@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToTree@InlineRep@Cord@absl@@QEAAXPEAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrevTransition@TimeZone@absl@@QEBA_NVTime@2@PEAUCivilTransition@12@@Z
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+    ?Print@Streamable@str_format_internal@absl@@QEBAAEAV?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@AEAV456@@Z
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+    ?PushDead@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AEAAXPEAUHashtablezInfo@container_internal@3@@Z
+    ?PutPaddedString@FormatSinkImpl@str_format_internal@absl@@QEAA_NVstring_view@3@HH_N@Z
+    ?RawEnableLogPrefix@log_internal@absl@@YAX_N@Z
+    ?RawLog@raw_log_internal@absl@@YAXW4LogSeverity@2@PEBDH1ZZ
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+    ?Read@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K0AEAPEAUCordRep@23@@Z
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+    ?ReadDigits@?$BigUnsigned@$0FE@@strings_internal@absl@@AEAAHPEBD0H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$03@strings_internal@absl@@QEAAHAEBUParsedFloat@23@H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAHAEBUParsedFloat@23@H@Z
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+    ?ReaderTryLock@Mutex@absl@@QEAA_NXZ
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+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPEBDH000@Z@Z
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+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQEBQEAXHP6AXPEBDPEAX@Z2@Z@Z
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+    ?Release@ReleasableMutexLock@absl@@QEAAXXZ
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+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QEAAXPEAX@Z
+    ?RemovePrefix@Cord@absl@@QEAAX_K@Z
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+    ?RemoveSuffix@Cord@absl@@QEAAX_K@Z
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+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K1@Z
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AEAA_NAEBV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_K@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPEAUCordRep@12@V?$FunctionRef@$$A6AXPEAUCordRep@cord_internal@absl@@_K1@Z@2@@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QEBA_NXZ
+    ?SampleSlow@container_internal@absl@@YAPEAUHashtablezInfo@12@AEAUSamplingState@12@_K@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QEAA?AVstring_view@3@_K@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AEAAXXZ
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QEAAX_K@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPEAUThreadIdentity@12@P6AXPEAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QEAAXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IEAAXXZ
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAX_K@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QEAAXVstring_view@2@VCord@2@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPEAPEAXPEAHHHPEBX1@Z@Z
+    ?SetStatusPayloadPrinter@status_internal@absl@@YAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@AEBVCord@2@@Z@Z
+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPEAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QEAAXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXXZ
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QEAAXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QEAAXH@Z
+    ?ShouldInsertBackwards@container_internal@absl@@YA_N_KPEBW4ctrl_t@12@@Z
+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QEAA_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QEAA_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QEAA_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QEAAXXZ
+    ?SignalAll@CondVar@absl@@QEAAXXZ
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PEA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PEAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PEAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YA_KNPEAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SA_KXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QEAA?AUPosition@123@_K@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AEAAXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AEAAXI@Z
+    ?SnprintF@str_format_internal@absl@@YAHPEAD_KVUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPEAU?$atomic@I@Cr@std@@HQEBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
+    ?SpinLoop@SpinLock@base_internal@absl@@AEAAIXZ
+    ?StackTraceWorksForTest@debugging_internal@absl@@YA_NXZ
+    ?StartsWithIgnoreCase@absl@@YA_NVstring_view@1@0@Z
+    ?StatusCodeToString@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusCode@1@@Z
+    ?StderrThreshold@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@111@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@11@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@1@Z
+    ?StrAppend@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@000@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@00@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@AEBVAlphaNum@1@0@Z
+    ?StrError@base_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@H@Z
+    ?StrReplaceAll@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ?StrReplaceAll@absl@@YAHV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@3@@Z
+    ?SubLength@CordRepRing@cord_internal@absl@@AEAAXI_K@Z
+    ?SubRing@CordRepRing@cord_internal@absl@@SAPEAV123@PEAV123@_K11@Z
+    ?SubTree@CordRepBtree@cord_internal@absl@@QEAAPEAUCordRep@23@_K0@Z
+    ?Subcord@Cord@absl@@QEBA?AV12@_K0@Z
+    ?SubstituteAndAppendArray@substitute_internal@absl@@YAXPEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@2@PEBV62@_K@Z
+    ?Summarize@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SuppressSigabortTrace@log_internal@absl@@YA_NXZ
+    ?Symbolize@absl@@YA_NPEBXPEADH@Z
+    ?ThreadIsLoggingToLogSink@log_internal@absl@@YA_NXZ
+    ?ThrowBadStatusOrAccess@internal_statusor@absl@@YAXVStatus@2@@Z
+    ?ThrowBadVariantAccess@variant_internal@absl@@YAXXZ
+    ?ThrowSeedGenException@random_internal@absl@@YAXXZ
+    ?ThrowStdBadAlloc@base_internal@absl@@YAXXZ
+    ?ThrowStdBadFunctionCall@base_internal@absl@@YAXXZ
+    ?ThrowStdDomainError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdDomainError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPEBD@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXAEBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPEBD@Z
+    ?Tick@PerThreadSem@synchronization_internal@absl@@SAXPEAUThreadIdentity@base_internal@3@@Z
+    ?TimeFromTimespec@absl@@YA?AVTime@1@Utimespec@@@Z
+    ?TimeFromTimeval@absl@@YA?AVTime@1@Utimeval@@@Z
+    ?TimeLocal@TimeZoneInfo@cctz@time_internal@absl@@AEBA?AUcivil_lookup@time_zone@234@AEBV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@234@_J@Z
+    ?TimeZone@log_internal@absl@@YAPEBV02@XZ
+    ?ToChronoHours@absl@@YA?AV?$duration@JV?$ratio@$0OBA@$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoMicroseconds@absl@@YA?AV?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoMilliseconds@absl@@YA?AV?$duration@_JV?$ratio@$00$0DOI@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoMinutes@absl@@YA?AV?$duration@JV?$ratio@$0DM@$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoNanoseconds@absl@@YA?AV?$duration@_JV?$ratio@$00$0DLJKMKAA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoSeconds@absl@@YA?AV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoTime@absl@@YA?AV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@234@@chrono@Cr@std@@VTime@1@@Z
+    ?ToDoubleHours@absl@@YANVDuration@1@@Z
+    ?ToDoubleMicroseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleMilliseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleMinutes@absl@@YANVDuration@1@@Z
+    ?ToDoubleNanoseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleSeconds@absl@@YANVDuration@1@@Z
+    ?ToInt64Hours@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Microseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Milliseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Minutes@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Nanoseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Seconds@absl@@YA_JVDuration@1@@Z
+    ?ToSinkAlso@LogMessage@log_internal@absl@@QEAAAEAV123@PEAVLogSink@3@@Z
+    ?ToSinkOnly@LogMessage@log_internal@absl@@QEAAAEAV123@PEAVLogSink@3@@Z
+    ?ToString@?$BigUnsigned@$03@strings_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?ToString@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?ToString@Status@absl@@QEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusToStringMode@2@@Z
+    ?ToStringSlow@Status@absl@@AEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusToStringMode@2@@Z
+    ?ToTM@absl@@YA?AUtm@@VTime@1@VTimeZone@1@@Z
+    ?ToTimeT@absl@@YA_JVTime@1@@Z
+    ?ToTimespec@absl@@YA?AUtimespec@@VDuration@1@@Z
+    ?ToTimespec@absl@@YA?AUtimespec@@VTime@1@@Z
+    ?ToTimeval@absl@@YA?AUtimeval@@VDuration@1@@Z
+    ?ToTimeval@absl@@YA?AUtimeval@@VTime@1@@Z
+    ?ToUDate@absl@@YANVTime@1@@Z
+    ?ToUniversal@absl@@YA_JVTime@1@@Z
+    ?ToUnixMicros@absl@@YA_JVTime@1@@Z
+    ?ToUnixMillis@absl@@YA_JVTime@1@@Z
+    ?ToUnixNanos@absl@@YA_JVTime@1@@Z
+    ?ToUnixSeconds@absl@@YA_JVTime@1@@Z
+    ?Track@CordzInfo@cord_internal@absl@@AEAAXXZ
+    ?TrackCord@CordzInfo@cord_internal@absl@@SAXAEAVInlineData@23@AEBV423@W4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?TrackCord@CordzInfo@cord_internal@absl@@SAXAEAVInlineData@23@W4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?Trans@Mutex@absl@@AEAAXPEBUMuHowS@2@@Z
+    ?Trunc@absl@@YA?AVDuration@1@V21@0@Z
+    ?TryLock@Mutex@absl@@QEAA_NXZ
+    ?TryRemove@Mutex@absl@@AEAAXPEAUPerThreadSynch@base_internal@2@@Z
+    ?UTC@Impl@time_zone@cctz@time_internal@absl@@SA?AV2345@XZ
+    ?UTCImpl@Impl@time_zone@cctz@time_internal@absl@@CAPEBV12345@XZ
+    ?UnauthenticatedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?UnavailableError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?UnimplementedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?UnknownError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Unlock@CordzInfo@cord_internal@absl@@QEAAXXZ
+    ?Unlock@Mutex@absl@@QEAAXXZ
+    ?UnlockSlow@Mutex@absl@@AEAAXPEAUSynchWaitParams@2@@Z
+    ?UnparseFlag@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VDuration@1@@Z
+    ?UnparseFlag@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VTime@1@@Z
+    ?UnrefNonInlined@Status@absl@@CAX_K@Z
+    ?UnrefTree@InlineRep@Cord@absl@@AEAAXXZ
+    ?UnsampleSlow@container_internal@absl@@YAXPEAUHashtablezInfo@12@@Z
+    ?Untrack@CordzInfo@cord_internal@absl@@QEAAXXZ
+    ?UpdateStackTrace@GraphCycles@synchronization_internal@absl@@QEAAXUGraphId@23@HP6AHPEAPEAXH@Z@Z
+    ?Utf8SafeCEscape@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?Utf8SafeCHexEscape@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?Version@TimeZoneInfo@cctz@time_internal@absl@@UEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?Version@TimeZoneLibC@cctz@time_internal@absl@@UEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?Version@ZoneInfoSource@cctz@time_internal@absl@@UEBA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?Wait@BlockingCounter@absl@@QEAAXXZ
+    ?Wait@CondVar@absl@@QEAAXPEAVMutex@2@@Z
+    ?Wait@Waiter@synchronization_internal@absl@@QEAA_NVKernelTimeout@23@@Z
+    ?WaitCommon@CondVar@absl@@AEAA_NPEAVMutex@2@VKernelTimeout@synchronization_internal@2@@Z
+    ?WaitForNotification@Notification@absl@@QEBAXXZ
+    ?WaitForNotificationWithDeadline@Notification@absl@@QEBA_NVTime@2@@Z
+    ?WaitForNotificationWithTimeout@Notification@absl@@QEBA_NVDuration@2@@Z
+    ?WaitWithDeadline@CondVar@absl@@QEAA_NPEAVMutex@2@VTime@2@@Z
+    ?WaitWithTimeout@CondVar@absl@@QEAA_NPEAVMutex@2@VDuration@2@@Z
+    ?Wakeup@CondVar@absl@@AEAAXPEAUPerThreadSynch@base_internal@2@@Z
+    ?Wakeup@Mutex@absl@@AEAAPEAUPerThreadSynch@base_internal@2@PEAU342@@Z
+    ?WebSafeBase64Escape@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?WebSafeBase64Escape@absl@@YAXVstring_view@1@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?WebSafeBase64Unescape@absl@@YA_NVstring_view@1@PEAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?WithMetadataFrom@LogMessage@log_internal@absl@@QEAAAEAV123@AEBVLogEntry@3@@Z
+    ?WithPerror@LogMessage@log_internal@absl@@QEAAAEAV123@XZ
+    ?WithThreadID@LogMessage@log_internal@absl@@QEAAAEAV123@I@Z
+    ?WithTimestamp@LogMessage@log_internal@absl@@QEAAAEAV123@VTime@3@@Z
+    ?WithVerbosity@LogMessage@log_internal@absl@@QEAAAEAV123@H@Z
+    ?Write@BufferRawSink@str_format_internal@absl@@QEAAXVstring_view@3@@Z
+    ?Write@FILERawSink@str_format_internal@absl@@QEAAXVstring_view@3@@Z
+    ?WriteToStderr@log_internal@absl@@YAXVstring_view@2@W4LogSeverity@2@@Z
+    ?__add_back_capacity@?$deque@PEBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PEBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEAAXXZ
+    ?__annotate_delete@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_delete@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEBAXXZ
+    ?__annotate_increase@?$vector@PEAVCordzHandle@cord_internal@absl@@V?$allocator@PEAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEBAX_K@Z
+    ?__annotate_increase@?$vector@PEAVLogSink@absl@@V?$allocator@PEAVLogSink@absl@@@Cr@std@@@Cr@std@@AEBAX_K@Z
+    ?__annotate_increase@?$vector@PEBVCordzHandle@cord_internal@absl@@V?$allocator@PEBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AEBAX_K@Z
+    ?__annotate_increase@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AEBAX_K@Z
+    ?__annotate_increase@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AEBAX_K@Z
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+    ?words@?$BigUnsigned@$0FE@@strings_internal@absl@@QEBAPEBIXZ
+    ?xsputn@LogEntryStreambuf@log_internal@absl@@MEAA_JPEBD_J@Z
+    ?xsputn@Streambuf@OStringStream@strings_internal@absl@@MEAA_JPEBD_J@Z
+    ?ymd_ord@impl@detail@cctz@time_internal@absl@@YA_J_JCC@Z
diff --git a/third_party/abseil-cpp/symbols_x86_dbg.def b/third_party/abseil-cpp/symbols_x86_dbg.def
new file mode 100644
index 0000000000..dc09811585
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_x86_dbg.def
@@ -0,0 +1,3896 @@
+EXPORTS
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+    ??$ArgumentToConv@F@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@G@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@H@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@I@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@J@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@K@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@M@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@N@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@O@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@PBD@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@UVoidPtr@str_format_internal@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
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+    ??$ArgumentToConv@Vint128@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@Vstring_view@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@Vuint128@absl@@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@_J@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@_K@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
+    ??$ArgumentToConv@_N@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@XZ
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+    ??$CallOnceImpl@A6AXXZ$$V@base_internal@absl@@YAXPAU?$atomic@I@Cr@std@@W4SchedulingMode@01@A6AXXZ@Z
+    ??$CastAndCallFunction@$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@CA_NPBV01@@Z
+    ??$CastAndCallFunction@USynchEvent@absl@@@Condition@absl@@CA_NPBV01@@Z
+    ??$Compare@$0FE@$0FE@@strings_internal@absl@@YAHABV?$BigUnsigned@$0FE@@01@0@Z
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+    ??$ConstructElements@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@V?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@V?$move_iterator@PAUPayload@status_internal@absl@@@23@@inlined_vector_internal@absl@@@inlined_vector_internal@absl@@YAXAAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@PAUPayload@status_internal@1@AAV?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@V?$move_iterator@PAUPayload@status_internal@absl@@@23@@01@I@Z
+    ??$Convert@VFormatArgImpl@str_format_internal@absl@@@FormatArgImplFriend@str_format_internal@absl@@SA_NVFormatArgImpl@12@VFormatConversionSpecImpl@12@PAVFormatSinkImpl@12@@Z
+    ??$CreateWithCustomLimitImpl@$$V@CordBuffer@absl@@CA?AV01@II@Z
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+    ??$Dispatch@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@PBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$DivMod@$09@?$BigUnsigned@$03@strings_internal@absl@@AAEIXZ
+    ??$DivMod@$09@?$BigUnsigned@$0FE@@strings_internal@absl@@AAEIXZ
+    ??$EmplaceBack@ABQAUCordRep@cord_internal@absl@@@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAPAUCordRep@cord_internal@2@ABQAU342@@Z
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+    ??$EmplaceBack@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAUPayload@status_internal@2@$$QAU342@@Z
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+    ??$ExtractCharSet@$0BPPPL@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@U?$ArgConvertResult@$0BPPPL@@01@@Z
+    ??$ExtractCharSet@$0EAAAA@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@U?$ArgConvertResult@$0EAAAA@@01@@Z
+    ??$ExtractCharSet@$0EAAAE@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@U?$ArgConvertResult@$0EAAAE@@01@@Z
+    ??$ExtractCharSet@$0IAAAE@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@U?$ArgConvertResult@$0IAAAE@@01@@Z
+    ??$ExtractCharSet@$0JPOAA@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@U?$ArgConvertResult@$0JPOAA@@01@@Z
+    ??$ExtractCharSet@$0JPPPL@@str_format_internal@absl@@YA?AW4FormatConversionCharSet@1@U?$ArgConvertResult@$0JPPPL@@01@@Z
+    ??$FastIntToBuffer@C@numbers_internal@absl@@YAPADCPAD@Z
+    ??$FastIntToBuffer@D@numbers_internal@absl@@YAPADDPAD@Z
+    ??$FastIntToBuffer@E@numbers_internal@absl@@YAPADEPAD@Z
+    ??$FastIntToBuffer@F@numbers_internal@absl@@YAPADFPAD@Z
+    ??$FastIntToBuffer@G@numbers_internal@absl@@YAPADGPAD@Z
+    ??$FastIntToBuffer@J@numbers_internal@absl@@YAPADJPAD@Z
+    ??$FastIntToBuffer@K@numbers_internal@absl@@YAPADKPAD@Z
+    ??$Fill@$00@CordRepRing@cord_internal@absl@@AAEXPBV012@II@Z
+    ??$Fill@$0A@@CordRepRing@cord_internal@absl@@AAEXPBV012@II@Z
+    ??$FindBinary@$00@CordRepRing@cord_internal@absl@@ABEIIII@Z
+    ??$FindBinary@$0A@@CordRepRing@cord_internal@absl@@ABEIIII@Z
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+    ??$Flush@V?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$Flush@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$Flush@VBufferRawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$Flush@VFILERawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
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+    ??$FromInt64@$0DLJKMKAA@@time_internal@absl@@YA?AVDuration@1@_JV?$ratio@$00$0DLJKMKAA@@Cr@std@@@Z
+    ??$FromInt64@$0DOI@@time_internal@absl@@YA?AVDuration@1@_JV?$ratio@$00$0DOI@@Cr@std@@@Z
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+    ??$GenericCompare@HVstring_view@absl@@@absl@@YAHABVCord@0@ABVstring_view@0@I@Z
+    ??$GenericCompare@_NVCord@absl@@@absl@@YA_NABVCord@0@0I@Z
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+    ??$HashOf@$S$$ZVstring_view@absl@@H@absl@@YAIABVstring_view@0@ABH@Z
+    ??$HidePtr@$$CBX@base_internal@absl@@YAIPBX@Z
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+    ??$HidePtr@X@base_internal@absl@@YAIPAX@Z
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+    ??$Init@D@FormatArgImpl@str_format_internal@absl@@AAEXABD@Z
+    ??$Init@H@FormatArgImpl@str_format_internal@absl@@AAEXABH@Z
+    ??$Init@I@FormatArgImpl@str_format_internal@absl@@AAEXABI@Z
+    ??$Init@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@AAEXABVstring_view@2@@Z
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+    ??$Invoke@VMixingHashState@hash_internal@absl@@I@UniquelyRepresentedProbe@HashSelect@hash_internal@absl@@SA?AVMixingHashState@23@V423@ABI@Z
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+    ??$InvokeFlush@VBufferRawSink@str_format_internal@absl@@@str_format_internal@absl@@YAXPAVBufferRawSink@01@Vstring_view@1@@Z
+    ??$InvokeFlush@VFILERawSink@str_format_internal@absl@@@str_format_internal@absl@@YAXPAVFILERawSink@01@Vstring_view@1@@Z
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+    ??$Pointer@$0A@$$CBD@?$LayoutImpl@V?$tuple@IPAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@I$S@absl@@U?$integer_sequence@I$0A@@5@@internal_layout@container_internal@absl@@QBEPBIPBD@Z
+    ??$Pointer@$0A@D@?$LayoutImpl@V?$tuple@IPAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@I$S@absl@@U?$integer_sequence@I$0A@@5@@internal_layout@container_internal@absl@@QBEPAIPAD@Z
+    ??$PopDead@_JI@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AAEPAUHashtablezInfo@container_internal@2@_JI@Z
+    ??$Prepend@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QAEX$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$Register@AB_JAAI@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QAEPAUHashtablezInfo@container_internal@2@AB_JAAI@Z
+    ??$SNPrintF@DHHH@absl@@YAHPADIABV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@0@ABDABH33@Z
+    ??$STLStringResizeUninitialized@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@I@Z
+    ??$STLStringResizeUninitializedAmortized@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@I@Z
+    ??$Seconds@H$0A@@absl@@YA?AVDuration@0@H@Z
+    ??$Seconds@J$0A@@absl@@YA?AVDuration@0@J@Z
+    ??$Seconds@_J$0A@@absl@@YA?AVDuration@0@_J@Z
+    ??$SetEdge@$00@CordRepBtree@cord_internal@absl@@QAE?AUOpResult@012@_NPAUCordRep@12@I@Z
+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QAE?AUOpResult@012@_NPAUCordRep@12@I@Z
+    ??$SharedCompareImpl@VCord@absl@@@absl@@YAHABVCord@0@0@Z
+    ??$SharedCompareImpl@Vstring_view@absl@@@absl@@YAHABVCord@0@ABVstring_view@0@@Z
+    ??$SmallMemmove@$00@cord_internal@absl@@YAXPADPBDI@Z
+    ??$SmallMemmove@$0A@@cord_internal@absl@@YAXPADPBDI@Z
+    ??$StrAppend@$$V@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@0@1111@Z
+    ??$StrFormat@DHHHHH_JIVstring_view@absl@@HV12@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@0@ABDABH2222AB_JABIABVstring_view@0@25@Z
+    ??$StrReplaceAll@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@0@ABV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@3@@Z
+    ??$StrReplaceAll@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@absl@@YAHABV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@2@@Z
+    ??$ToChronoDuration@V?$duration@JV?$ratio@$0DM@$00@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@JV?$ratio@$0DM@$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToChronoDuration@V?$duration@JV?$ratio@$0OBA@$00@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@JV?$ratio@$0OBA@$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToChronoDuration@V?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToChronoDuration@V?$duration@_JV?$ratio@$00$0DLJKMKAA@@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@_JV?$ratio@$00$0DLJKMKAA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToChronoDuration@V?$duration@_JV?$ratio@$00$0DOI@@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@_JV?$ratio@$00$0DOI@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToChronoDuration@V?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@chrono@Cr@std@@@time_internal@absl@@YA?AV?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ??$ToInt@C@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@D@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@E@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@F@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@G@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@PBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@VFormatArgImpl@str_format_internal@absl@@@FormatArgImplFriend@str_format_internal@absl@@SA_NVFormatArgImpl@12@PAH@Z
+    ??$ToInt@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$0A@@Cr@std@@2@Z
+    ??$ToInt@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToInt@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@PAHU?$integral_constant@_N$00@Cr@std@@U?$integral_constant@_N$0A@@56@@Z
+    ??$ToIntVal@C@FormatArgImpl@str_format_internal@absl@@CAHABC@Z
+    ??$ToIntVal@D@FormatArgImpl@str_format_internal@absl@@CAHABD@Z
+    ??$ToIntVal@E@FormatArgImpl@str_format_internal@absl@@CAHABE@Z
+    ??$ToIntVal@F@FormatArgImpl@str_format_internal@absl@@CAHABF@Z
+    ??$ToIntVal@G@FormatArgImpl@str_format_internal@absl@@CAHABG@Z
+    ??$ToIntVal@H@FormatArgImpl@str_format_internal@absl@@CAHABH@Z
+    ??$ToIntVal@I@FormatArgImpl@str_format_internal@absl@@CAHABI@Z
+    ??$ToIntVal@J@FormatArgImpl@str_format_internal@absl@@CAHABJ@Z
+    ??$ToIntVal@K@FormatArgImpl@str_format_internal@absl@@CAHABK@Z
+    ??$ToIntVal@_J@FormatArgImpl@str_format_internal@absl@@CAHAB_J@Z
+    ??$ToIntVal@_K@FormatArgImpl@str_format_internal@absl@@CAHAB_K@Z
+    ??$ToIntVal@_N@FormatArgImpl@str_format_internal@absl@@CAHAB_N@Z
+    ??$TrailingZeros@I@container_internal@absl@@YAII@Z
+    ??$UnhidePtr@X@base_internal@absl@@YAPAXI@Z
+    ??$__advance@PBUTransition@cctz@time_internal@absl@@@Cr@std@@YAXAAPBUTransition@cctz@time_internal@absl@@HUrandom_access_iterator_tag@01@@Z
+    ??$__advance@PBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAXAAPBVFormatArgImpl@str_format_internal@absl@@HUrandom_access_iterator_tag@01@@Z
+    ??$__allocate_at_least@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@01@AAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPAVCordzHandle@cord_internal@absl@@@01@AAV?$allocator@PAVCordzHandle@cord_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPAVLogSink@absl@@@01@AAV?$allocator@PAVLogSink@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPBVCordzHandle@cord_internal@absl@@@01@AAV?$allocator@PBVCordzHandle@cord_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUTransition@cctz@time_internal@absl@@@01@AAV?$allocator@UTransition@cctz@time_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUTransitionType@cctz@time_internal@absl@@@01@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUViableSubstitution@strings_internal@absl@@@01@AAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAVFormatArgImpl@str_format_internal@absl@@@01@AAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@I@Z
+    ??$__construct_at_end@PBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@AAEXPBVFormatArgImpl@str_format_internal@absl@@0I@Z
+    ??$__construct_at_end@V?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@PAPBVImpl@time_zone@cctz@time_internal@absl@@AAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXV?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransition@cctz@time_internal@absl@@AAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXV?$move_iterator@PAUTransition@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXV?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_node_hash@ABUpiecewise_construct_t@Cr@std@@V?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AAE?AV?$unique_ptr@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@V?$__hash_node_destructor@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@23@@12@IABUpiecewise_construct_t@12@$$QAV?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QAV?$tuple@$$V@12@@Z
+    ??$__construct_one_at_end@$$V@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AAEXXZ
+    ??$__construct_one_at_end@$$V@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AAEXXZ
+    ??$__construct_one_at_end@AAVstring_view@absl@@ABV12@AAI@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AAEXAAVstring_view@absl@@ABV34@AAI@Z
+    ??$__construct_one_at_end@ABQAVCordzHandle@cord_internal@absl@@@?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AAEXABQAVCordzHandle@cord_internal@absl@@@Z
+    ??$__construct_one_at_end@ABQAVLogSink@absl@@@?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@AAEXABQAVLogSink@absl@@@Z
+    ??$__construct_one_at_end@ABQBVCordzHandle@cord_internal@absl@@@?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AAEXABQBVCordzHandle@cord_internal@absl@@@Z
+    ??$__construct_one_at_end@ABUTransition@cctz@time_internal@absl@@@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AAEXABUTransition@cctz@time_internal@absl@@@Z
+    ??$__construct_one_at_end@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AAEX$$QAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__copy@PBVFormatArgImpl@str_format_internal@absl@@PBV123@PAV123@$0A@@Cr@std@@YA?AU?$pair@PBVFormatArgImpl@str_format_internal@absl@@PAV123@@01@PBVFormatArgImpl@str_format_internal@absl@@0PAV345@@Z
+    ??$__copy_impl@$$CBVFormatArgImpl@str_format_internal@absl@@V123@X@Cr@std@@YA?AU?$pair@PBVFormatArgImpl@str_format_internal@absl@@PAV123@@01@PBVFormatArgImpl@str_format_internal@absl@@0PAV345@@Z
+    ??$__cxx_atomic_compare_exchange_strong@PAVTimeZone@absl@@@Cr@std@@YA_NPAU?$__cxx_atomic_base_impl@PAVTimeZone@absl@@@01@PAPAVTimeZone@absl@@PAV34@W4memory_order@01@3@Z
+    ??$__cxx_atomic_compare_exchange_weak@PAUHashtablezInfo@container_internal@absl@@@Cr@std@@YA_NPAU?$__cxx_atomic_base_impl@PAUHashtablezInfo@container_internal@absl@@@01@PAPAUHashtablezInfo@container_internal@absl@@PAU345@W4memory_order@01@3@Z
+    ??$__cxx_atomic_load@P6AXABUHashtablezInfo@container_internal@absl@@@Z@Cr@std@@YAP6AXABUHashtablezInfo@container_internal@absl@@@ZPBU?$__cxx_atomic_base_impl@P6AXABUHashtablezInfo@container_internal@absl@@@Z@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PAUHashtablezInfo@container_internal@absl@@@Cr@std@@YAPAUHashtablezInfo@container_internal@absl@@PBU?$__cxx_atomic_base_impl@PAUHashtablezInfo@container_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PAVCordzHandle@cord_internal@absl@@@Cr@std@@YAPAVCordzHandle@cord_internal@absl@@PBU?$__cxx_atomic_base_impl@PAVCordzHandle@cord_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PAVCordzInfo@cord_internal@absl@@@Cr@std@@YAPAVCordzInfo@cord_internal@absl@@PBU?$__cxx_atomic_base_impl@PAVCordzInfo@cord_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@PAVTimeZone@absl@@@Cr@std@@YAPAVTimeZone@absl@@PBU?$__cxx_atomic_base_impl@PAVTimeZone@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@W4OnDeadlockCycle@absl@@@Cr@std@@YA?AW4OnDeadlockCycle@absl@@PBU?$__cxx_atomic_base_impl@W4OnDeadlockCycle@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_load@W4State@PerThreadSynch@base_internal@absl@@@Cr@std@@YA?AW4State@PerThreadSynch@base_internal@absl@@PBU?$__cxx_atomic_base_impl@W4State@PerThreadSynch@base_internal@absl@@@01@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@PAVCordzHandle@cord_internal@absl@@@Cr@std@@YAXPAU?$__cxx_atomic_base_impl@PAVCordzHandle@cord_internal@absl@@@01@PAVCordzHandle@cord_internal@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@PAVCordzInfo@cord_internal@absl@@@Cr@std@@YAXPAU?$__cxx_atomic_base_impl@PAVCordzInfo@cord_internal@absl@@@01@PAVCordzInfo@cord_internal@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@W4OnDeadlockCycle@absl@@@Cr@std@@YAXPAU?$__cxx_atomic_base_impl@W4OnDeadlockCycle@absl@@@01@W4OnDeadlockCycle@absl@@W4memory_order@01@@Z
+    ??$__cxx_atomic_store@W4State@PerThreadSynch@base_internal@absl@@@Cr@std@@YAXPAU?$__cxx_atomic_base_impl@W4State@PerThreadSynch@base_internal@absl@@@01@W4State@PerThreadSynch@base_internal@absl@@W4memory_order@01@@Z
+    ??$__debug_db_erase_c@V?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_erase_c@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
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+    ??$__debug_db_insert_c@V?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_insert_c@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@@Cr@std@@YAXPAV?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@01@@Z
+    ??$__debug_db_invalidate_all@V?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@@Cr@std@@YAXPAV?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@01@@Z
+    ??$__destroy_at@PAPBVImpl@time_zone@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@PAUCordRep@cord_internal@absl@@$0A@@Cr@std@@YAXPAPAUCordRep@cord_internal@absl@@@Z
+    ??$__destroy_at@PAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPAPAVCordzHandle@cord_internal@absl@@@Z
+    ??$__destroy_at@PAVLogSink@absl@@$0A@@Cr@std@@YAXPAPAVLogSink@absl@@@Z
+    ??$__destroy_at@PBVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPAPBVCordzHandle@cord_internal@absl@@@Z
+    ??$__destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$__destroy_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@@Cr@std@@YAXPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPAUPayload@status_internal@absl@@@Z
+    ??$__destroy_at@UTransition@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPAUTransition@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@UTransitionType@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$__destroy_at@UViableSubstitution@strings_internal@absl@@$0A@@Cr@std@@YAXPAUViableSubstitution@strings_internal@absl@@@Z
+    ??$__destroy_at@VFormatArgImpl@str_format_internal@absl@@$0A@@Cr@std@@YAXPAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$__distance@PBUPayload@status_internal@absl@@@Cr@std@@YAHPBUPayload@status_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@PBUTransition@cctz@time_internal@absl@@@Cr@std@@YAHPBUTransition@cctz@time_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@PBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAHPBVFormatArgImpl@str_format_internal@absl@@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAHV?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAHV?$move_iterator@PAUTransition@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__distance@V?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAHV?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@0Urandom_access_iterator_tag@01@@Z
+    ??$__do_rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AAEXI@Z
+    ??$__emplace_back_slow_path@AAVstring_view@absl@@ABV12@AAI@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@AAEXAAVstring_view@absl@@ABV34@AAI@Z
+    ??$__emplace_unique_key_args@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABUpiecewise_construct_t@23@V?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QAE?AU?$pair@V?$__hash_iterator@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@_N@12@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@ABUpiecewise_construct_t@12@$$QAV?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QAV?$tuple@$$V@12@@Z
+    ??$__invoke@AAUByCivilTime@Transition@cctz@time_internal@absl@@ABU2345@ABU2345@@Cr@std@@YA_NAAUByCivilTime@Transition@cctz@time_internal@absl@@ABU3456@1@Z
+    ??$__invoke@AAUByUnixTime@Transition@cctz@time_internal@absl@@ABU2345@ABU2345@@Cr@std@@YA_NAAUByUnixTime@Transition@cctz@time_internal@absl@@ABU3456@1@Z
+    ??$__invoke@AAU__identity@Cr@std@@ABUTransition@cctz@time_internal@absl@@@Cr@std@@YAABUTransition@cctz@time_internal@absl@@AAU__identity@01@ABU2345@@Z
+    ??$__launder@$$CBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@PBU201@@Z
+    ??$__launder@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@PAU201@@Z
+    ??$__lower_bound_impl@U_ClassicAlgPolicy@Cr@std@@PBUTransition@cctz@time_internal@absl@@PBU4567@U4567@U__identity@23@UByUnixTime@4567@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@AAUByUnixTime@2345@AAU__identity@01@@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV45678@PAPAPBV45678@@Cr@std@@YA?AU?$pair@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@@01@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PAPAVLogSink@absl@@PAPAV45@PAPAV45@@Cr@std@@YA?AU?$pair@PAPAVLogSink@absl@@PAPAV12@@01@PAPAVLogSink@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PAUTransition@cctz@time_internal@absl@@PAU4567@PAU4567@@Cr@std@@YA?AU?$pair@PAUTransition@cctz@time_internal@absl@@PAU1234@@01@PAUTransition@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@PAUTransitionType@cctz@time_internal@absl@@PAU4567@PAU4567@@Cr@std@@YA?AU?$pair@PAUTransitionType@cctz@time_internal@absl@@PAU1234@@01@PAUTransitionType@cctz@time_internal@absl@@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAPAVLogSink@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAPAVLogSink@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@00@Z
+    ??$__move@U_ClassicAlgPolicy@Cr@std@@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@23@V423@V423@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV45678@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PAUTransition@cctz@time_internal@absl@@PAU4567@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$__move_backward@U_ClassicAlgPolicy@Cr@std@@PAUTransitionType@cctz@time_internal@absl@@PAU4567@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@PAPBVImpl@time_zone@cctz@time_internal@absl@@PAPBV45678@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@UTransition@cctz@time_internal@absl@@U4567@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$__move_backward_impl@U_ClassicAlgPolicy@Cr@std@@UTransitionType@cctz@time_internal@absl@@U4567@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAPAVCordzHandle@cord_internal@absl@@PAPAV456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAPAVLogSink@absl@@PAPAV45@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAPAVLogSink@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAPBVCordzHandle@cord_internal@absl@@PAPBV456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAPBVImpl@time_zone@cctz@time_internal@absl@@PAPBV45678@X@Cr@std@@YA?AU?$pair@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@@01@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAUTransition@cctz@time_internal@absl@@PAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAUTransitionType@cctz@time_internal@absl@@PAU4567@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAUViableSubstitution@strings_internal@absl@@PAU456@$0A@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAVCordzHandle@cord_internal@absl@@PAV456@X@Cr@std@@YA?AU?$pair@PAPAVCordzHandle@cord_internal@absl@@PAPAV123@@01@PAPAVCordzHandle@cord_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PAVLogSink@absl@@PAV45@X@Cr@std@@YA?AU?$pair@PAPAVLogSink@absl@@PAPAV12@@01@PAPAVLogSink@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@PBVCordzHandle@cord_internal@absl@@PBV456@X@Cr@std@@YA?AU?$pair@PAPBVCordzHandle@cord_internal@absl@@PAPBV123@@01@PAPBVCordzHandle@cord_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU1234@@01@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UTransition@cctz@time_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PAUTransition@cctz@time_internal@absl@@PAU1234@@01@PAUTransition@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UTransitionType@cctz@time_internal@absl@@U4567@X@Cr@std@@YA?AU?$pair@PAUTransitionType@cctz@time_internal@absl@@PAU1234@@01@PAUTransitionType@cctz@time_internal@absl@@00@Z
+    ??$__move_impl@U_ClassicAlgPolicy@Cr@std@@UViableSubstitution@strings_internal@absl@@U456@X@Cr@std@@YA?AU?$pair@PAUViableSubstitution@strings_internal@absl@@PAU123@@01@PAUViableSubstitution@strings_internal@absl@@00@Z
+    ??$__push_back_slow_path@ABQAVCordzHandle@cord_internal@absl@@@?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AAEXABQAVCordzHandle@cord_internal@absl@@@Z
+    ??$__push_back_slow_path@ABQAVLogSink@absl@@@?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@AAEXABQAVLogSink@absl@@@Z
+    ??$__push_back_slow_path@ABQBVCordzHandle@cord_internal@absl@@@?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@AAEXABQBVCordzHandle@cord_internal@absl@@@Z
+    ??$__push_back_slow_path@ABUTransition@cctz@time_internal@absl@@@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@AAEXABUTransition@cctz@time_internal@absl@@@Z
+    ??$__push_back_slow_path@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@AAEX$$QAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$__rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AAEXI@Z
+    ??$__rewrap_iter@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@U?$__unwrap_iter_impl@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@0@Z
+    ??$__rewrap_iter@PAPAVCordzHandle@cord_internal@absl@@PAPAV123@U?$__unwrap_iter_impl@PAPAVCordzHandle@cord_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAPAVCordzHandle@cord_internal@absl@@PAPAV234@0@Z
+    ??$__rewrap_iter@PAPAVLogSink@absl@@PAPAV12@U?$__unwrap_iter_impl@PAPAVLogSink@absl@@$00@Cr@std@@@Cr@std@@YAPAPAVLogSink@absl@@PAPAV23@0@Z
+    ??$__rewrap_iter@PAPBVCordzHandle@cord_internal@absl@@PAPBV123@U?$__unwrap_iter_impl@PAPBVCordzHandle@cord_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAPBVCordzHandle@cord_internal@absl@@PAPBV234@0@Z
+    ??$__rewrap_iter@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU1234@U?$__unwrap_iter_impl@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU2345@0@Z
+    ??$__rewrap_iter@PAUTransition@cctz@time_internal@absl@@PAU1234@U?$__unwrap_iter_impl@PAUTransition@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@0@Z
+    ??$__rewrap_iter@PAUTransitionType@cctz@time_internal@absl@@PAU1234@U?$__unwrap_iter_impl@PAUTransitionType@cctz@time_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@0@Z
+    ??$__rewrap_iter@PAUViableSubstitution@strings_internal@absl@@PAU123@U?$__unwrap_iter_impl@PAUViableSubstitution@strings_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAUViableSubstitution@strings_internal@absl@@PAU234@0@Z
+    ??$__rewrap_iter@PAVFormatArgImpl@str_format_internal@absl@@PAV123@U?$__unwrap_iter_impl@PAVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPAVFormatArgImpl@str_format_internal@absl@@PAV234@0@Z
+    ??$__rewrap_iter@PBVFormatArgImpl@str_format_internal@absl@@PBV123@U?$__unwrap_iter_impl@PBVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@@Cr@std@@YAPBVFormatArgImpl@str_format_internal@absl@@PBV234@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAPAVLogSink@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_iter@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@$0A@@23@@Cr@std@@YA?AV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@V201@0@Z
+    ??$__rewrap_range@PBVFormatArgImpl@str_format_internal@absl@@PBV123@PBV123@@Cr@std@@YAPBVFormatArgImpl@str_format_internal@absl@@PBV234@0@Z
+    ??$__to_address@$$CBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAPBVFormatArgImpl@str_format_internal@absl@@PBV234@@Z
+    ??$__to_address@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@@Z
+    ??$__to_address@PAVCordzHandle@cord_internal@absl@@@Cr@std@@YAPAPAVCordzHandle@cord_internal@absl@@PAPAV234@@Z
+    ??$__to_address@PAVLogSink@absl@@@Cr@std@@YAPAPAVLogSink@absl@@PAPAV23@@Z
+    ??$__to_address@PBVCordzHandle@cord_internal@absl@@@Cr@std@@YAPAPBVCordzHandle@cord_internal@absl@@PAPBV234@@Z
+    ??$__to_address@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@YAPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU2345@@Z
+    ??$__to_address@UTransition@cctz@time_internal@absl@@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@@Z
+    ??$__to_address@UTransitionType@cctz@time_internal@absl@@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@@Z
+    ??$__to_address@UViableSubstitution@strings_internal@absl@@@Cr@std@@YAPAUViableSubstitution@strings_internal@absl@@PAU234@@Z
+    ??$__to_address@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAPAVFormatArgImpl@str_format_internal@absl@@PAV234@@Z
+    ??$__uninitialized_allocator_copy@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@VFormatArgImpl@str_format_internal@absl@@V456@$0A@@Cr@std@@YAPAVFormatArgImpl@str_format_internal@absl@@AAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@PBV234@1PAV234@@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@23@V423@PAVCordzHandle@cord_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@AAV?$allocator@PAVCordzHandle@cord_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PAVLogSink@absl@@@Cr@std@@V?$reverse_iterator@PAPAVLogSink@absl@@@23@V423@PAVLogSink@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAPAVLogSink@absl@@@01@AAV?$allocator@PAVLogSink@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@23@V423@PBVCordzHandle@cord_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@AAV?$allocator@PBVCordzHandle@cord_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@23@V423@UConversionItem@ParsedFormatBase@str_format_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@PAUTransition@cctz@time_internal@absl@@PAU4567@U4567@X@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@AAV?$allocator@UTransition@cctz@time_internal@absl@@@01@PAU2345@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@23@V423@UTransition@cctz@time_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@AAV?$allocator@UTransition@cctz@time_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@PAUTransitionType@cctz@time_internal@absl@@PAU4567@U4567@X@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@PAU2345@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@23@V423@UTransitionType@cctz@time_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@V201@11@Z
+    ??$__uninitialized_allocator_move_if_noexcept@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@23@V423@UViableSubstitution@strings_internal@absl@@X@Cr@std@@YA?AV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@AAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@V201@11@Z
+    ??$__unwrap_iter@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@@Z
+    ??$__unwrap_iter@PAPAVCordzHandle@cord_internal@absl@@U?$__unwrap_iter_impl@PAPAVCordzHandle@cord_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAPAVCordzHandle@cord_internal@absl@@PAPAV234@@Z
+    ??$__unwrap_iter@PAPAVLogSink@absl@@U?$__unwrap_iter_impl@PAPAVLogSink@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAPAVLogSink@absl@@PAPAV23@@Z
+    ??$__unwrap_iter@PAPBVCordzHandle@cord_internal@absl@@U?$__unwrap_iter_impl@PAPBVCordzHandle@cord_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAPBVCordzHandle@cord_internal@absl@@PAPBV234@@Z
+    ??$__unwrap_iter@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@U?$__unwrap_iter_impl@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU2345@@Z
+    ??$__unwrap_iter@PAUTransition@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PAUTransition@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@@Z
+    ??$__unwrap_iter@PAUTransitionType@cctz@time_internal@absl@@U?$__unwrap_iter_impl@PAUTransitionType@cctz@time_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@@Z
+    ??$__unwrap_iter@PAUViableSubstitution@strings_internal@absl@@U?$__unwrap_iter_impl@PAUViableSubstitution@strings_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAUViableSubstitution@strings_internal@absl@@PAU234@@Z
+    ??$__unwrap_iter@PAVFormatArgImpl@str_format_internal@absl@@U?$__unwrap_iter_impl@PAVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPAVFormatArgImpl@str_format_internal@absl@@PAV234@@Z
+    ??$__unwrap_iter@PBVFormatArgImpl@str_format_internal@absl@@U?$__unwrap_iter_impl@PBVFormatArgImpl@str_format_internal@absl@@$00@Cr@std@@$0A@@Cr@std@@YAPBVFormatArgImpl@str_format_internal@absl@@PBV234@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAPAVLogSink@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@V201@@Z
+    ??$__unwrap_iter@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@U?$__unwrap_iter_impl@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@$0A@@23@$0A@@Cr@std@@YA?AV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@V201@@Z
+    ??$__unwrap_range@PBVFormatArgImpl@str_format_internal@absl@@PBV123@@Cr@std@@YA?A?<auto>@@PBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByCivilTime@Transition@cctz@time_internal@absl@@PBU5678@PBU5678@U5678@U__identity@23@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@$$QAUByCivilTime@2345@$$QAU__identity@01@@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByUnixTime@Transition@cctz@time_internal@absl@@PBU5678@PBU5678@U5678@U__identity@23@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@$$QAUByUnixTime@2345@$$QAU__identity@01@@Z
+    ??$advance@PBUTransition@cctz@time_internal@absl@@H@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAXAAPBUTransition@cctz@time_internal@absl@@H@Z
+    ??$advance@PBUTransition@cctz@time_internal@absl@@HHX@Cr@std@@YAXAAPBUTransition@cctz@time_internal@absl@@H@Z
+    ??$advance@PBVFormatArgImpl@str_format_internal@absl@@IIX@Cr@std@@YAXAAPBVFormatArgImpl@str_format_internal@absl@@I@Z
+    ??$assign@PBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QAEXPBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$assign@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IAEX$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$call_once@A6AXXZ$$V@absl@@YAXAAVonce_flag@0@A6AXXZ@Z
+    ??$combine@H$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@ABH@Z
+    ??$combine@I$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@ABI@Z
+    ??$combine@V?$tuple@ABVstring_view@absl@@ABH@Cr@std@@$$V@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@ABV?$tuple@ABVstring_view@absl@@ABH@Cr@std@@@Z
+    ??$combine@Vstring_view@absl@@H@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@ABVstring_view@2@ABH@Z
+    ??$combine_contiguous@D@?$HashStateBase@VMixingHashState@hash_internal@absl@@@hash_internal@absl@@SA?AVMixingHashState@12@V312@PBDI@Z
+    ??$construct@PAPBVImpl@time_zone@cctz@time_internal@absl@@ABQAPBV12345@XX@?$allocator_traits@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@12@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@ABQAPBV45678@@Z
+    ??$construct@PAPBVImpl@time_zone@cctz@time_internal@absl@@PAPBV12345@XX@?$allocator_traits@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@12@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@$$QAPAPBV45678@@Z
+    ??$construct@PAUCordRep@cord_internal@absl@@ABQAU123@XX@?$allocator_traits@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAUCordRep@cord_internal@absl@@@12@PAPAUCordRep@cord_internal@absl@@ABQAU456@@Z
+    ??$construct@PAUCordRep@cord_internal@absl@@PAU123@XX@?$allocator_traits@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAUCordRep@cord_internal@absl@@@12@PAPAUCordRep@cord_internal@absl@@$$QAPAU456@@Z
+    ??$construct@PAVCordzHandle@cord_internal@absl@@ABQAV123@XX@?$allocator_traits@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAVCordzHandle@cord_internal@absl@@@12@PAPAVCordzHandle@cord_internal@absl@@ABQAV456@@Z
+    ??$construct@PAVLogSink@absl@@ABQAV12@XX@?$allocator_traits@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAVLogSink@absl@@@12@PAPAVLogSink@absl@@ABQAV45@@Z
+    ??$construct@PAVLogSink@absl@@PAV12@XX@?$allocator_traits@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAVLogSink@absl@@@12@PAPAVLogSink@absl@@$$QAPAV45@@Z
+    ??$construct@PBVCordzHandle@cord_internal@absl@@ABQBV123@XX@?$allocator_traits@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PBVCordzHandle@cord_internal@absl@@@12@PAPBVCordzHandle@cord_internal@absl@@ABQBV456@@Z
+    ??$construct@PBVImpl@time_zone@cctz@time_internal@absl@@ABQBV12345@XX@?$allocator_traits@V?$allocator@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PBVImpl@time_zone@cctz@time_internal@absl@@@12@PAPBVImpl@time_zone@cctz@time_internal@absl@@ABQBV45678@@Z
+    ??$construct@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@ABUpiecewise_construct_t@23@V?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@12@PAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@12@ABUpiecewise_construct_t@12@$$QAV?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QAV?$tuple@$$V@12@@Z
+    ??$construct@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@$$QAU4567@@Z
+    ??$construct@UPayload@status_internal@absl@@ABU123@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UPayload@status_internal@absl@@@12@PAUPayload@status_internal@absl@@ABU456@@Z
+    ??$construct@UPayload@status_internal@absl@@U123@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UPayload@status_internal@absl@@@12@PAUPayload@status_internal@absl@@$$QAU456@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@$$VXX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PAUTransition@cctz@time_internal@absl@@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@ABU1234@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PAUTransition@cctz@time_internal@absl@@ABU4567@@Z
+    ??$construct@UTransition@cctz@time_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PAUTransition@cctz@time_internal@absl@@$$QAU4567@@Z
+    ??$construct@UTransitionType@cctz@time_internal@absl@@$$VXX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$construct@UTransitionType@cctz@time_internal@absl@@U1234@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PAUTransitionType@cctz@time_internal@absl@@$$QAU4567@@Z
+    ??$construct@UViableSubstitution@strings_internal@absl@@AAVstring_view@3@ABV43@AAIXX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@PAUViableSubstitution@strings_internal@absl@@AAVstring_view@6@ABV76@AAI@Z
+    ??$construct@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IAEX$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$construct_at@PAPBVImpl@time_zone@cctz@time_internal@absl@@ABQAPBV12345@PAPAPBV12345@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@ABQAPBV23456@@Z
+    ??$construct_at@PAPBVImpl@time_zone@cctz@time_internal@absl@@PAPBV12345@PAPAPBV12345@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@$$QAPAPBV23456@@Z
+    ??$construct_at@PAUCordRep@cord_internal@absl@@ABQAU123@PAPAU123@@Cr@std@@YAPAPAUCordRep@cord_internal@absl@@PAPAU234@ABQAU234@@Z
+    ??$construct_at@PAUCordRep@cord_internal@absl@@PAU123@PAPAU123@@Cr@std@@YAPAPAUCordRep@cord_internal@absl@@PAPAU234@$$QAPAU234@@Z
+    ??$construct_at@PAVCordzHandle@cord_internal@absl@@ABQAV123@PAPAV123@@Cr@std@@YAPAPAVCordzHandle@cord_internal@absl@@PAPAV234@ABQAV234@@Z
+    ??$construct_at@PAVLogSink@absl@@ABQAV12@PAPAV12@@Cr@std@@YAPAPAVLogSink@absl@@PAPAV23@ABQAV23@@Z
+    ??$construct_at@PAVLogSink@absl@@PAV12@PAPAV12@@Cr@std@@YAPAPAVLogSink@absl@@PAPAV23@$$QAPAV23@@Z
+    ??$construct_at@PBVCordzHandle@cord_internal@absl@@ABQBV123@PAPBV123@@Cr@std@@YAPAPBVCordzHandle@cord_internal@absl@@PAPBV234@ABQBV234@@Z
+    ??$construct_at@PBVImpl@time_zone@cctz@time_internal@absl@@ABQBV12345@PAPBV12345@@Cr@std@@YAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPBV23456@ABQBV23456@@Z
+    ??$construct_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@ABUpiecewise_construct_t@23@V?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@PAU123@@Cr@std@@YAPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@PAU201@ABUpiecewise_construct_t@01@$$QAV?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@01@$$QAV?$tuple@$$V@01@@Z
+    ??$construct_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@U1234@PAU1234@@Cr@std@@YAPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU2345@$$QAU2345@@Z
+    ??$construct_at@UPayload@status_internal@absl@@ABU123@PAU123@@Cr@std@@YAPAUPayload@status_internal@absl@@PAU234@ABU234@@Z
+    ??$construct_at@UPayload@status_internal@absl@@U123@PAU123@@Cr@std@@YAPAUPayload@status_internal@absl@@PAU234@$$QAU234@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@$$VPAU1234@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@ABU1234@PAU1234@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@ABU2345@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@U1234@PAU1234@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@$$QAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@$$VPAU1234@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@U1234@PAU1234@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@$$QAU2345@@Z
+    ??$construct_at@UViableSubstitution@strings_internal@absl@@AAVstring_view@3@ABV43@AAIPAU123@@Cr@std@@YAPAUViableSubstitution@strings_internal@absl@@PAU234@AAVstring_view@4@ABV54@AAI@Z
+    ??$copy@PBVFormatArgImpl@str_format_internal@absl@@PAV123@@Cr@std@@YAPAVFormatArgImpl@str_format_internal@absl@@PBV234@0PAV234@@Z
+    ??$countl_zero@_K@absl@@YAH_K@Z
+    ??$countr_zero@I@absl@@YAHI@Z
+    ??$destroy@PAPBVImpl@time_zone@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@12@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$destroy@PAUCordRep@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAUCordRep@cord_internal@absl@@@12@PAPAUCordRep@cord_internal@absl@@@Z
+    ??$destroy@PAVCordzHandle@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAVCordzHandle@cord_internal@absl@@@12@PAPAVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy@PAVLogSink@absl@@XX@?$allocator_traits@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PAVLogSink@absl@@@12@PAPAVLogSink@absl@@@Z
+    ??$destroy@PBVCordzHandle@cord_internal@absl@@XX@?$allocator_traits@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@PBVCordzHandle@cord_internal@absl@@@12@PAPBVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@12@PAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$destroy@UConversionItem@ParsedFormatBase@str_format_internal@absl@@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$destroy@UPayload@status_internal@absl@@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UPayload@status_internal@absl@@@12@PAUPayload@status_internal@absl@@@Z
+    ??$destroy@UTransition@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransition@cctz@time_internal@absl@@@12@PAUTransition@cctz@time_internal@absl@@@Z
+    ??$destroy@UTransitionType@cctz@time_internal@absl@@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@PAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$destroy@UViableSubstitution@strings_internal@absl@@XX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@UViableSubstitution@strings_internal@absl@@@12@PAUViableSubstitution@strings_internal@absl@@@Z
+    ??$destroy@VFormatArgImpl@str_format_internal@absl@@XX@?$allocator_traits@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAXAAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@12@PAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$destroy_at@PAPBVImpl@time_zone@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Z
+    ??$destroy_at@PAUCordRep@cord_internal@absl@@$0A@@Cr@std@@YAXPAPAUCordRep@cord_internal@absl@@@Z
+    ??$destroy_at@PAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPAPAVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy_at@PAVLogSink@absl@@$0A@@Cr@std@@YAXPAPAVLogSink@absl@@@Z
+    ??$destroy_at@PBVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@YAXPAPBVCordzHandle@cord_internal@absl@@@Z
+    ??$destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$destroy_at@UConversionItem@ParsedFormatBase@str_format_internal@absl@@$0A@@Cr@std@@YAXPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Z
+    ??$destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPAUPayload@status_internal@absl@@@Z
+    ??$destroy_at@UTransition@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPAUTransition@cctz@time_internal@absl@@@Z
+    ??$destroy_at@UTransitionType@cctz@time_internal@absl@@$0A@@Cr@std@@YAXPAUTransitionType@cctz@time_internal@absl@@@Z
+    ??$destroy_at@UViableSubstitution@strings_internal@absl@@$0A@@Cr@std@@YAXPAUViableSubstitution@strings_internal@absl@@@Z
+    ??$destroy_at@VFormatArgImpl@str_format_internal@absl@@$0A@@Cr@std@@YAXPAVFormatArgImpl@str_format_internal@absl@@@Z
+    ??$distance@PBUPayload@status_internal@absl@@@Cr@std@@YAHPBUPayload@status_internal@absl@@0@Z
+    ??$distance@PBUTransition@cctz@time_internal@absl@@@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAHPBUTransition@cctz@time_internal@absl@@0@Z
+    ??$distance@PBUTransition@cctz@time_internal@absl@@@Cr@std@@YAHPBUTransition@cctz@time_internal@absl@@0@Z
+    ??$distance@PBVFormatArgImpl@str_format_internal@absl@@@Cr@std@@YAHPBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$distance@V?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAHV?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@01@0@Z
+    ??$distance@V?$move_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAHV?$move_iterator@PAUTransition@cctz@time_internal@absl@@@01@0@Z
+    ??$distance@V?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAHV?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@0@Z
+    ??$emplace@$$V@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAE?AV?$__wrap_iter@PAUTransition@cctz@time_internal@absl@@@12@V?$__wrap_iter@PBUTransition@cctz@time_internal@absl@@@12@@Z
+    ??$emplace@$$V@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAE?AV?$__wrap_iter@PAUTransitionType@cctz@time_internal@absl@@@12@V?$__wrap_iter@PBUTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$emplace_back@$$V@?$__split_buffer@UTransition@cctz@time_internal@absl@@AAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXXZ
+    ??$emplace_back@$$V@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXXZ
+    ??$emplace_back@AAVstring_view@absl@@ABV12@AAI@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QAEAAUViableSubstitution@strings_internal@absl@@AAVstring_view@5@ABV65@AAI@Z
+    ??$emplace_back@ABQAUCordRep@cord_internal@absl@@@?$InlinedVector@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QAEAAPAUCordRep@cord_internal@1@ABQAU231@@Z
+    ??$emplace_back@ABQAVLogSink@absl@@@?$InlinedVector@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@absl@@QAEAAPAVLogSink@1@ABQAV21@@Z
+    ??$emplace_back@UPayload@status_internal@absl@@@?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QAEAAUPayload@status_internal@1@$$QAU231@@Z
+    ??$exchange@_JH@absl@@YA_JAA_J$$QAH@Z
+    ??$find@V?$__wrap_iter@PAPAVLogSink@absl@@@Cr@std@@PAVLogSink@absl@@@Cr@std@@YA?AV?$__wrap_iter@PAPAVLogSink@absl@@@01@V201@0ABQAVLogSink@absl@@@Z
+    ??$find@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QAE?AV?$__hash_iterator@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@12@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@@Z
+    ??$find_first_non_full@X@container_internal@absl@@YA?AUFindInfo@01@PBW4ctrl_t@01@II@Z
+    ??$forward@$$T@absl@@YA$$QA$$TAA$$T@Z
+    ??$forward@AAI@absl@@YAAAIAAI@Z
+    ??$forward@AAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@YAAAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@AAV123@@Z
+    ??$forward@AAV?$allocator@PAVLogSink@absl@@@Cr@std@@@absl@@YAAAV?$allocator@PAVLogSink@absl@@@Cr@std@@AAV123@@Z
+    ??$forward@AAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YAAAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AAV123@@Z
+    ??$forward@ABV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YAABV?$allocator@UPayload@status_internal@absl@@@Cr@std@@ABV123@@Z
+    ??$forward@ABVCord@absl@@@absl@@YAABVCord@0@ABV10@@Z
+    ??$forward@H@absl@@YA$$QAHAAH@Z
+    ??$forward@I@absl@@YA$$QAIAAI@Z
+    ??$forward@V?$allocator@H@Cr@std@@@absl@@YA$$QAV?$allocator@H@Cr@std@@AAV123@@Z
+    ??$forward@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@YA$$QAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@AAV123@@Z
+    ??$forward@V?$allocator@PAVLogSink@absl@@@Cr@std@@@absl@@YA$$QAV?$allocator@PAVLogSink@absl@@@Cr@std@@AAV123@@Z
+    ??$forward@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@YA$$QAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@AAV123@@Z
+    ??$get@$00@?$CompressedTuple@V?$allocator@H@Cr@std@@I@container_internal@absl@@QGAEAAIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@H@Cr@std@@I@container_internal@absl@@QGBEABIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@I@container_internal@absl@@QGAEAAIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@I@container_internal@absl@@QGBEABIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@PAPAUCordRep@cord_internal@absl@@@container_internal@absl@@QGAEAAPAPAUCordRep@cord_internal@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PAVLogSink@absl@@@Cr@std@@I@container_internal@absl@@QGAEAAIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PAVLogSink@absl@@@Cr@std@@I@container_internal@absl@@QGBEABIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@PAVLogSink@absl@@@Cr@std@@PAPAVLogSink@absl@@@container_internal@absl@@QGAEAAPAPAVLogSink@2@XZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@I@container_internal@absl@@QGAEAAIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@I@container_internal@absl@@QGBEABIXZ
+    ??$get@$00@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PAUPayload@status_internal@absl@@@container_internal@absl@@QGAEAAPAUPayload@status_internal@2@XZ
+    ??$get@$00ABVstring_view@absl@@ABH@Cr@std@@YAABHABV?$tuple@ABVstring_view@absl@@ABH@01@@Z
+    ??$get@$00Vstring_view@absl@@V12@@Cr@std@@YAABVstring_view@absl@@ABU?$pair@Vstring_view@absl@@V12@@01@@Z
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@H@Cr@std@@I@container_internal@absl@@QGAEAAV?$allocator@H@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@I@container_internal@absl@@QGAEAAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@PAPAUCordRep@cord_internal@absl@@@container_internal@absl@@QGAEAAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PAVLogSink@absl@@@Cr@std@@I@container_internal@absl@@QGAEAAV?$allocator@PAVLogSink@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@PAVLogSink@absl@@@Cr@std@@PAPAVLogSink@absl@@@container_internal@absl@@QGAEAAV?$allocator@PAVLogSink@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@I@container_internal@absl@@QGAEAAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@I@container_internal@absl@@QGBEABV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@@?$CompressedTuple@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PAUPayload@status_internal@absl@@@container_internal@absl@@QGAEAAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ??$get@$0A@ABVstring_view@absl@@ABH@Cr@std@@YAABVstring_view@absl@@ABV?$tuple@ABVstring_view@absl@@ABH@01@@Z
+    ??$get@$0A@Vstring_view@absl@@V12@@Cr@std@@YAABVstring_view@absl@@ABU?$pair@Vstring_view@absl@@V12@@01@@Z
+    ??$get@Vstring_view@absl@@V12@@?$__get_pair@$00@Cr@std@@SAABVstring_view@absl@@ABU?$pair@Vstring_view@absl@@V12@@12@@Z
+    ??$get@Vstring_view@absl@@V12@@?$__get_pair@$0A@@Cr@std@@SAABVstring_view@absl@@ABU?$pair@Vstring_view@absl@@V12@@12@@Z
+    ??$hash@V?$tuple@ABVstring_view@absl@@ABH@Cr@std@@$0A@@MixingHashState@hash_internal@absl@@SAIABV?$tuple@ABVstring_view@absl@@ABH@Cr@std@@@Z
+    ??$hash_bytes@VMixingHashState@hash_internal@absl@@H@hash_internal@absl@@YA?AVMixingHashState@01@V201@ABH@Z
+    ??$hash_bytes@VMixingHashState@hash_internal@absl@@I@hash_internal@absl@@YA?AVMixingHashState@01@V201@ABI@Z
+    ??$hash_range_or_bytes@VMixingHashState@hash_internal@absl@@D@hash_internal@absl@@YA?AVMixingHashState@01@V201@PBDI@Z
+    ??$hash_tuple@VMixingHashState@hash_internal@absl@@V?$tuple@ABVstring_view@absl@@ABH@Cr@std@@$0A@$00@hash_internal@absl@@YA?AVMixingHashState@01@V201@ABV?$tuple@ABVstring_view@absl@@ABH@Cr@std@@U?$integer_sequence@I$0A@$00@1@@Z
+    ??$launder@$$CBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPBU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@PBU201@@Z
+    ??$launder@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YAPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@PAU201@@Z
+    ??$lower_bound@PBUTransition@cctz@time_internal@absl@@U1234@UByUnixTime@1234@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@UByUnixTime@2345@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@$$QAV301@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAPAVLogSink@absl@@@01@$$QAV301@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@$$QAV301@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@$$QAV301@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@$$QAV301@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@$$QAV301@@Z
+    ??$make_pair@AAV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@AAV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@$$QAV301@@Z
+    ??$make_pair@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@@Cr@std@@YA?AU?$pair@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@@01@$$QAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PAPAVCordzHandle@cord_internal@absl@@PAPAV123@@Cr@std@@YA?AU?$pair@PAPAVCordzHandle@cord_internal@absl@@PAPAV123@@01@$$QAPAPAVCordzHandle@cord_internal@absl@@0@Z
+    ??$make_pair@PAPAVLogSink@absl@@PAPAV12@@Cr@std@@YA?AU?$pair@PAPAVLogSink@absl@@PAPAV12@@01@$$QAPAPAVLogSink@absl@@0@Z
+    ??$make_pair@PAPBVCordzHandle@cord_internal@absl@@PAPBV123@@Cr@std@@YA?AU?$pair@PAPBVCordzHandle@cord_internal@absl@@PAPBV123@@01@$$QAPAPBVCordzHandle@cord_internal@absl@@0@Z
+    ??$make_pair@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU1234@@Cr@std@@YA?AU?$pair@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@PAU1234@@01@$$QAPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@0@Z
+    ??$make_pair@PAUTransition@cctz@time_internal@absl@@PAU1234@@Cr@std@@YA?AU?$pair@PAUTransition@cctz@time_internal@absl@@PAU1234@@01@$$QAPAUTransition@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PAUTransitionType@cctz@time_internal@absl@@PAU1234@@Cr@std@@YA?AU?$pair@PAUTransitionType@cctz@time_internal@absl@@PAU1234@@01@$$QAPAUTransitionType@cctz@time_internal@absl@@0@Z
+    ??$make_pair@PAUViableSubstitution@strings_internal@absl@@PAU123@@Cr@std@@YA?AU?$pair@PAUViableSubstitution@strings_internal@absl@@PAU123@@01@$$QAPAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$make_pair@PBVFormatArgImpl@str_format_internal@absl@@PAV123@@Cr@std@@YA?AU?$pair@PBVFormatArgImpl@str_format_internal@absl@@PAV123@@01@$$QAPBVFormatArgImpl@str_format_internal@absl@@$$QAPAV345@@Z
+    ??$make_pair@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAPAVLogSink@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@0@Z
+    ??$make_pair@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AU?$pair@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@01@$$QAV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@0@Z
+    ??$make_unique@ULogMessageData@LogMessage@log_internal@absl@@AAPBDAAHAAW4LogSeverity@4@VTime@4@@Cr@std@@YA?AV?$unique_ptr@ULogMessageData@LogMessage@log_internal@absl@@U?$default_delete@ULogMessageData@LogMessage@log_internal@absl@@@Cr@std@@@01@AAPBDAAHAAW4LogSeverity@absl@@$$QAVTime@4@@Z
+    ??$make_unique@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@$$V@Cr@std@@YA?AV?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@01@XZ
+    ??$make_unique@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@AAV12@@Cr@std@@YA?AV?$unique_ptr@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@U?$default_delete@V?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@@01@AAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Z
+    ??$max@VDuration@absl@@@Cr@std@@YAABVDuration@absl@@ABV23@0@Z
+    ??$max@VDuration@absl@@U?$__less@VDuration@absl@@V12@@Cr@std@@@Cr@std@@YAABVDuration@absl@@ABV23@0U?$__less@VDuration@absl@@V12@@01@@Z
+    ??$max_size@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@12@@Z
+    ??$max_size@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PAUCordRep@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PAVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PAVLogSink@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PAVLogSink@absl@@@12@@Z
+    ??$max_size@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PBVCordzHandle@cord_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@PBVImpl@time_zone@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@XX@?$allocator_traits@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@SAIABV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@12@@Z
+    ??$max_size@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@UPayload@status_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@UTransition@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@UTransitionType@cctz@time_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@UViableSubstitution@strings_internal@absl@@@12@@Z
+    ??$max_size@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@XX@?$allocator_traits@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@SAIABV?$allocator@VFormatArgImpl@str_format_internal@absl@@@12@@Z
+    ??$min@VDuration@absl@@@Cr@std@@YAABVDuration@absl@@ABV23@0@Z
+    ??$min@VDuration@absl@@U?$__less@VDuration@absl@@V12@@Cr@std@@@Cr@std@@YAABVDuration@absl@@ABV23@0U?$__less@VDuration@absl@@V12@@01@@Z
+    ??$move@AA_J@absl@@YA$$QA_JAA_J@Z
+    ??$move@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@00@Z
+    ??$move@PAPAVLogSink@absl@@PAPAV12@@Cr@std@@YAPAPAVLogSink@absl@@PAPAV23@00@Z
+    ??$move@PAUTransition@cctz@time_internal@absl@@PAU1234@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$move@PAUTransitionType@cctz@time_internal@absl@@PAU1234@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$move@V?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAPAVCordzHandle@cord_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PAPAVLogSink@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAPAVLogSink@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAPBVCordzHandle@cord_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAUTransition@cctz@time_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAUTransitionType@cctz@time_internal@absl@@@01@V201@00@Z
+    ??$move@V?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@V123@@Cr@std@@YA?AV?$reverse_iterator@PAUViableSubstitution@strings_internal@absl@@@01@V201@00@Z
+    ??$move_backward@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV12345@@Cr@std@@YAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@PAPAPBV23456@00@Z
+    ??$move_backward@PAUTransition@cctz@time_internal@absl@@PAU1234@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$move_backward@PAUTransitionType@cctz@time_internal@absl@@PAU1234@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@00@Z
+    ??$next@AAPBUTransition@cctz@time_internal@absl@@@?$_IterOps@U_ClassicAlgPolicy@Cr@std@@@Cr@std@@SAPBUTransition@cctz@time_internal@absl@@AAPBU3456@H@Z
+    ??$next@PBUTransition@cctz@time_internal@absl@@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@H@Z
+    ??$reset@PAPAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@?$unique_ptr@$$BY0A@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@V?$__bucket_list_deallocator@V?$allocator@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@@23@@Cr@std@@QAEXPAPAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@12@@Z
+    ??$swap@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@YAXAAPAPAPBVImpl@time_zone@cctz@time_internal@absl@@0@Z
+    ??$swap@PAPAVCordzHandle@cord_internal@absl@@@Cr@std@@YAXAAPAPAVCordzHandle@cord_internal@absl@@0@Z
+    ??$swap@PAPAVLogSink@absl@@@Cr@std@@YAXAAPAPAVLogSink@absl@@0@Z
+    ??$swap@PAPBVCordzHandle@cord_internal@absl@@@Cr@std@@YAXAAPAPBVCordzHandle@cord_internal@absl@@0@Z
+    ??$swap@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@YAXAAPAUConversionItem@ParsedFormatBase@str_format_internal@absl@@0@Z
+    ??$swap@PAUTransition@cctz@time_internal@absl@@@Cr@std@@YAXAAPAUTransition@cctz@time_internal@absl@@0@Z
+    ??$swap@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@YAXAAPAUTransitionType@cctz@time_internal@absl@@0@Z
+    ??$swap@PAUViableSubstitution@strings_internal@absl@@@Cr@std@@YAXAAPAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$swap@PBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@@Cr@std@@YAXAAPBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@0@Z
+    ??$swap@UViableSubstitution@strings_internal@absl@@@Cr@std@@YAXAAUViableSubstitution@strings_internal@absl@@0@Z
+    ??$swap@Vstring_view@absl@@@Cr@std@@YAXAAVstring_view@absl@@0@Z
+    ??$tie@$$CBVstring_view@absl@@$$CBH@Cr@std@@YA?AV?$tuple@ABVstring_view@absl@@ABH@01@ABVstring_view@absl@@ABH@Z
+    ??$upper_bound@PBUTransition@cctz@time_internal@absl@@U1234@UByCivilTime@1234@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@UByCivilTime@2345@@Z
+    ??$upper_bound@PBUTransition@cctz@time_internal@absl@@U1234@UByUnixTime@1234@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@UByUnixTime@2345@@Z
+    ??0?$AllocationTransaction@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAE@AAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@Z
+    ??0?$AllocationTransaction@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAE@AAV?$allocator@PAVLogSink@absl@@@Cr@std@@@Z
+    ??0?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAE@AAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QAE@Vstring_view@2@@Z
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QAE@XZ
+    ??0?$BigUnsigned@$03@strings_internal@absl@@QAE@_K@Z
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QAE@Vstring_view@2@@Z
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QAE@XZ
+    ??0?$BigUnsigned@$0FE@@strings_internal@absl@@QAE@_K@Z
+    ??0?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@absl@@QAE@PBD@Z
+    ??0?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@absl@@QAE@PBD@Z
+    ??0?$InlinedVector@H$0CP@V?$allocator@H@Cr@std@@@absl@@QAE@XZ
+    ??0?$InlinedVector@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QAE@XZ
+    ??0?$InlinedVector@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QAE@XZ
+    ??0?$InlinedVector@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@absl@@QAE@XZ
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QAE@ABV01@@Z
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QAE@ABV01@ABV?$allocator@UPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QAE@XZ
+    ??0?$IteratorValueAdapter@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@V?$move_iterator@PAPAUCordRep@cord_internal@absl@@@23@@inlined_vector_internal@absl@@QAE@ABV?$move_iterator@PAPAUCordRep@cord_internal@absl@@@Cr@std@@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@PAVLogSink@absl@@@Cr@std@@V?$move_iterator@PAPAVLogSink@absl@@@23@@inlined_vector_internal@absl@@QAE@ABV?$move_iterator@PAPAVLogSink@absl@@@Cr@std@@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@PBUPayload@status_internal@absl@@@inlined_vector_internal@absl@@QAE@ABQBUPayload@status_internal@2@@Z
+    ??0?$IteratorValueAdapter@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@V?$move_iterator@PAUPayload@status_internal@absl@@@23@@inlined_vector_internal@absl@@QAE@ABV?$move_iterator@PAUPayload@status_internal@absl@@@Cr@std@@@Z
+    ??0?$Layout@IPAUCordRep@cord_internal@absl@@I@container_internal@absl@@QAE@III@Z
+    ??0?$LayoutImpl@V?$tuple@IPAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@I$0A@$00$01@absl@@U45@@internal_layout@container_internal@absl@@QAE@III@Z
+    ??0?$LayoutImpl@V?$tuple@IPAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@I$0A@$00@absl@@U?$integer_sequence@I$0A@$00$01@5@@internal_layout@container_internal@absl@@QAE@II@Z
+    ??0?$LayoutImpl@V?$tuple@IPAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@I$0A@@absl@@U?$integer_sequence@I$0A@$00@5@@internal_layout@container_internal@absl@@QAE@I@Z
+    ??0?$LayoutImpl@V?$tuple@IPAUCordRep@cord_internal@absl@@I@Cr@std@@U?$integer_sequence@I$S@absl@@U?$integer_sequence@I$0A@@5@@internal_layout@container_internal@absl@@QAE@XZ
+    ??0?$NonIterableBitMask@I$0BA@$0A@@container_internal@absl@@QAE@I@Z
+    ??0?$RandenPool@E@random_internal@absl@@QAE@XZ
+    ??0?$RandenPool@G@random_internal@absl@@QAE@XZ
+    ??0?$RandenPool@I@random_internal@absl@@QAE@XZ
+    ??0?$RandenPool@_K@random_internal@absl@@QAE@XZ
+    ??0?$Sample@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QAE@XZ
+    ??0?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QAE@XZ
+    ??0?$Span@$$CBD@absl@@QAE@PBDI@Z
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+    ?GetAllocatedCapacity@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetAllocatedCapacity@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetAllocatedCapacity@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetAllocatedCapacity@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetAllocatedCapacity@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetAllocatedData@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QAEPAHXZ
+    ?GetAllocatedData@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAPAUCordRep@cord_internal@3@XZ
+    ?GetAllocatedData@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAPAUCordRep@cord_internal@3@XZ
+    ?GetAllocatedData@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAPAVLogSink@3@XZ
+    ?GetAllocatedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAUPayload@status_internal@3@XZ
+    ?GetAllocatedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEPBUPayload@status_internal@3@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@PAVLogSink@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@H@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@PAVLogSink@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAllocator@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEABV?$allocator@UPayload@status_internal@absl@@@Cr@std@@XZ
+    ?GetAppendBuffer@CordRepBtree@cord_internal@absl@@QAE?AV?$Span@D@3@I@Z
+    ?GetAppendBuffer@CordRepRing@cord_internal@absl@@QAE?AV?$Span@D@3@I@Z
+    ?GetAppendBufferSlow@CordRepBtree@cord_internal@absl@@AAE?AV?$Span@D@3@I@Z
+    ?GetAppendBufferSlowPath@Cord@absl@@AAE?AVCordBuffer@2@III@Z
+    ?GetCachedTID@base_internal@absl@@YAIXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetCapacity@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetCharacter@CordRepBtree@cord_internal@absl@@QBEDI@Z
+    ?GetCharacter@CordRepRing@cord_internal@absl@@QBEDI@Z
+    ?GetCond@WinHelper@Waiter@synchronization_internal@absl@@SAPAU_RTL_CONDITION_VARIABLE@@PAV234@@Z
+    ?GetCordzStatistics@CordzInfo@cord_internal@absl@@QBE?AUCordzStatistics@23@XZ
+    ?GetCurrentTimeNanos@absl@@YA_JXZ
+    ?GetData@?$AllocationTransaction@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAPAPAUCordRep@cord_internal@3@XZ
+    ?GetData@?$AllocationTransaction@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAPAPAVLogSink@3@XZ
+    ?GetData@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAPAUPayload@status_internal@3@XZ
+    ?GetDebugStackTraceHook@debugging_internal@absl@@YAP6AXQBQAXHP6AXPBDPAX@Z2@ZXZ
+    ?GetEstimatedFairShareMemoryUsage@cord_internal@absl@@YAIPBUCordRep@12@@Z
+    ?GetEstimatedMemoryUsage@cord_internal@absl@@YAIPBUCordRep@12@@Z
+    ?GetFirstChunk@Cord@absl@@CA?AVstring_view@2@ABV12@@Z
+    ?GetFirstChunk@Cord@absl@@CA?AVstring_view@2@V32@@Z
+    ?GetFlatAux@Cord@absl@@CA_NPAUCordRep@cord_internal@2@PAVstring_view@2@@Z
+    ?GetHashtablezMaxSamples@container_internal@absl@@YAIXZ
+    ?GetHashtablezSampleParameter@container_internal@absl@@YAHXZ
+    ?GetId@GraphCycles@synchronization_internal@absl@@QAE?AUGraphId@23@PAX@Z
+    ?GetInlinedCapacity@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetInlinedCapacity@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetInlinedCapacity@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetInlinedData@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QAEPAHXZ
+    ?GetInlinedData@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAPAUCordRep@cord_internal@3@XZ
+    ?GetInlinedData@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAPAUCordRep@cord_internal@3@XZ
+    ?GetInlinedData@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAPAVLogSink@3@XZ
+    ?GetInlinedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEPAUPayload@status_internal@3@XZ
+    ?GetInlinedData@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEPBUPayload@status_internal@3@XZ
+    ?GetIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QBE_NXZ
+    ?GetIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBE_NXZ
+    ?GetIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBE_NXZ
+    ?GetIsAllocated@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBE_NXZ
+    ?GetIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBE_NXZ
+    ?GetKeys@RandenHwAes@random_internal@absl@@SAPBXXZ
+    ?GetKeys@RandenSlow@random_internal@absl@@SAPBXXZ
+    ?GetLeafData@CordRepRing@cord_internal@absl@@SAPBDPBUCordRep@23@@Z
+    ?GetLock@WinHelper@Waiter@synchronization_internal@absl@@SAPAU_RTL_SRWLOCK@@PAV234@@Z
+    ?GetMaxSamples@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QBEIXZ
+    ?GetOrCreateCurrentThreadIdentity@synchronization_internal@absl@@YAPAUThreadIdentity@base_internal@2@XZ
+    ?GetParentMethod@CordzInfo@cord_internal@absl@@CA?AW4MethodIdentifier@CordzUpdateTracker@23@PBV123@@Z
+    ?GetParentStack@CordzInfo@cord_internal@absl@@QBE?AV?$Span@QAX@3@XZ
+    ?GetPayload@Status@absl@@QBE?AV?$optional@VCord@absl@@@2@Vstring_view@2@@Z
+    ?GetPayloads@Status@absl@@AAEPAV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@2@XZ
+    ?GetPayloads@Status@absl@@ABEPBV?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@2@XZ
+    ?GetPrependBuffer@CordRepRing@cord_internal@absl@@QAE?AV?$Span@D@3@I@Z
+    ?GetProgramCounter@debugging_internal@absl@@YAPAXQAX@Z
+    ?GetRepData@CordRepRing@cord_internal@absl@@SAPBDPBUCordRep@23@@Z
+    ?GetRepHi@time_internal@absl@@YA_JVDuration@2@@Z
+    ?GetRepLo@time_internal@absl@@YAIVDuration@2@@Z
+    ?GetSaltMaterial@random_internal@absl@@YA?AV?$optional@I@2@XZ
+    ?GetSize@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetSize@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetSize@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetSize@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetSize@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEIXZ
+    ?GetSizeAndIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetSizeAndIsAllocated@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QBEABIXZ
+    ?GetSizeAndIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetSizeAndIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEABIXZ
+    ?GetSizeAndIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetSizeAndIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEABIXZ
+    ?GetSizeAndIsAllocated@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetSizeAndIsAllocated@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEABIXZ
+    ?GetSizeAndIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAIXZ
+    ?GetSizeAndIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QBEABIXZ
+    ?GetSkipCount@ExponentialBiased@profiling_internal@absl@@QAE_J_J@Z
+    ?GetStack@CordzInfo@cord_internal@absl@@QBE?AV?$Span@QAX@3@XZ
+    ?GetStackFrames@absl@@YAHPAPAXPAHHH@Z
+    ?GetStackFramesWithContext@absl@@YAHPAPAXPAHHHPBX1@Z
+    ?GetStackTrace@GraphCycles@synchronization_internal@absl@@QAEHUGraphId@23@PAPAPAX@Z
+    ?GetStackTrace@absl@@YAHPAPAXHH@Z
+    ?GetStackTraceWithContext@absl@@YAHPAPAXHHPBXPAH@Z
+    ?GetStatusPayloadPrinter@status_internal@absl@@YAP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@ABVCord@2@@ZXZ
+    ?GetStride@ExponentialBiased@profiling_internal@absl@@QAE_J_J@Z
+    ?GetTID@base_internal@absl@@YAIXZ
+    ?GetTagForChar@str_format_internal@absl@@YA?AVConvTag@12@D@Z
+    ?GetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAPAU?$atomic@H@Cr@std@@XZ
+    ?GetTransitionType@TimeZoneInfo@cctz@time_internal@absl@@AAE_NH_NABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PAE@Z
+    ?GetWaiter@Waiter@synchronization_internal@absl@@SAPAV123@PAUThreadIdentity@base_internal@3@@Z
+    ?GetWeekday@absl@@YA?AW4weekday@detail@cctz@time_internal@1@V?$civil_time@Usecond_tag@time_internal@absl@@@3451@@Z
+    ?GetWord@?$BigUnsigned@$03@strings_internal@absl@@QBEIH@Z
+    ?GetWord@?$BigUnsigned@$0FE@@strings_internal@absl@@QBEIH@Z
+    ?GetYearDay@absl@@YAHV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?GlobalHashtablezSampler@container_internal@absl@@YAAAV?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@2@XZ
+    ?GuaranteedEqual@Condition@absl@@SA_NPBV12@0@Z
+    ?Guard@?$NullGuard@C@log_internal@absl@@SAABCABC@Z
+    ?Guard@?$NullGuard@D@log_internal@absl@@SAABDABD@Z
+    ?Guard@?$NullGuard@E@log_internal@absl@@SAABEABE@Z
+    ?Guard@?$NullGuard@F@log_internal@absl@@SAABFABF@Z
+    ?Guard@?$NullGuard@G@log_internal@absl@@SAABGABG@Z
+    ?Guard@?$NullGuard@H@log_internal@absl@@SAABHABH@Z
+    ?Guard@?$NullGuard@I@log_internal@absl@@SAABIABI@Z
+    ?Guard@?$NullGuard@J@log_internal@absl@@SAABJABJ@Z
+    ?Guard@?$NullGuard@K@log_internal@absl@@SAABKABK@Z
+    ?Guard@?$NullGuard@M@log_internal@absl@@SAABMABM@Z
+    ?Guard@?$NullGuard@N@log_internal@absl@@SAABNABN@Z
+    ?Guard@?$NullGuard@PAX@log_internal@absl@@SAABQAXABQAX@Z
+    ?Guard@?$NullGuard@PBX@log_internal@absl@@SAABQBXABQBX@Z
+    ?Guard@?$NullGuard@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@log_internal@absl@@SAABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABV456@@Z
+    ?Guard@?$NullGuard@Vstring_view@absl@@@log_internal@absl@@SAABVstring_view@3@ABV43@@Z
+    ?Guard@?$NullGuard@_J@log_internal@absl@@SAAB_JAB_J@Z
+    ?Guard@?$NullGuard@_K@log_internal@absl@@SAAB_KAB_K@Z
+    ?Guard@?$NullGuard@_N@log_internal@absl@@SAAB_NAB_N@Z
+    ?H1@container_internal@absl@@YAIIPBW4ctrl_t@12@@Z
+    ?HandleInvalidStatusCtorArg@Helper@internal_statusor@absl@@SAXPAVStatus@3@@Z
+    ?HasBeenNotifiedInternal@Notification@absl@@CA_NPBU?$atomic@_N@Cr@std@@@Z
+    ?HasEdge@GraphCycles@synchronization_internal@absl@@QBE_NUGraphId@23@0@Z
+    ?HasNode@GraphCycles@synchronization_internal@absl@@QAE_NUGraphId@23@@Z
+    ?HasRandenHwAesImplementation@random_internal@absl@@YA_NXZ
+    ?Head@CordzInfo@cord_internal@absl@@SAPAV123@ABVCordzSnapshot@23@@Z
+    ?HexStringToBytes@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@@Z
+    ?HideMask@base_internal@absl@@YAIXZ
+    ?HighestBitSet@?$NonIterableBitMask@I$0BA@$0A@@container_internal@absl@@QBEIXZ
+    ?IDivDuration@absl@@YA_JVDuration@1@0PAV21@@Z
+    ?IDivDuration@time_internal@absl@@YA_J_NVDuration@2@1PAV32@@Z
+    ?In@Time@absl@@QBE?AUBreakdown@12@VTimeZone@2@@Z
+    ?InMillisecondsFromNow@KernelTimeout@synchronization_internal@absl@@ABEKXZ
+    ?Increment@RefcountAndFlags@cord_internal@absl@@QAEXXZ
+    ?IncrementSynchSem@Mutex@absl@@CAXPAV12@PAUPerThreadSynch@base_internal@2@@Z
+    ?IndexBefore@CordRepBtree@cord_internal@absl@@ABE?AUPosition@123@U4123@I@Z
+    ?IndexBeyond@CordRepBtree@cord_internal@absl@@ABE?AUPosition@123@I@Z
+    ?IndexOf@CordRepBtree@cord_internal@absl@@ABE?AUPosition@123@I@Z
+    ?IndexOfLength@CordRepBtree@cord_internal@absl@@ABE?AUPosition@123@I@Z
+    ?InfiniteDuration@absl@@YA?AVDuration@1@XZ
+    ?InfiniteFuture@absl@@YA?AVTime@1@XZ
+    ?InfinitePast@absl@@YA?AVTime@1@XZ
+    ?Init@CordRepBtreeReader@cord_internal@absl@@QAE?AVstring_view@3@PAVCordRepBtree@23@@Z
+    ?Init@PerThreadSem@synchronization_internal@absl@@CAXPAUThreadIdentity@base_internal@3@@Z
+    ?InitDiscreteDistribution@random_internal@absl@@YA?AV?$vector@U?$pair@NI@Cr@std@@V?$allocator@U?$pair@NI@Cr@std@@@23@@Cr@std@@PAV?$vector@NV?$allocator@N@Cr@std@@@45@@Z
+    ?InitFirst@CordRepBtreeNavigator@cord_internal@absl@@QAEPAUCordRep@23@PAVCordRepBtree@23@@Z
+    ?InitFrom@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXABV123@@Z
+    ?InitInstance@CordRepBtree@cord_internal@absl@@AAEXHII@Z
+    ?InitTree@ChunkIterator@Cord@absl@@AAEXPAUCordRep@cord_internal@3@@Z
+    ?InitWhat@BadStatusOrAccess@absl@@ABEXXZ
+    ?Initialize@ExponentialBiased@profiling_internal@absl@@AAEXXZ
+    ?Initialize@LogEntryStreambuf@log_internal@absl@@AAEXXZ
+    ?InitializeCordRepExternal@cord_internal@absl@@YAXVstring_view@2@PAUCordRepExternal@12@@Z
+    ?InitializeSymbolizer@absl@@YAXPBD@Z
+    ?InlinedRepToCode@Status@absl@@CA?AW4StatusCode@2@I@Z
+    ?InsertEdge@GraphCycles@synchronization_internal@absl@@QAE_NUGraphId@23@0@Z
+    ?InstallFailureSignalHandler@absl@@YAXABUFailureSignalHandlerOptions@1@@Z
+    ?Int128High64@absl@@YA_JVint128@1@@Z
+    ?Int128Low64@absl@@YA_KVint128@1@@Z
+    ?Int128Max@absl@@YA?AVint128@1@XZ
+    ?Int128Min@absl@@YA?AVint128@1@XZ
+    ?InternalAttemptToUseMutexInFatalSignalHandler@Mutex@absl@@SAXXZ
+    ?InternalCondVarPoke@Waiter@synchronization_internal@absl@@AAEXXZ
+    ?InternalError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InternalStream@LogMessage@log_internal@absl@@QAEAAV123@XZ
+    ?InvalidArgumentError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?InvalidGraphId@synchronization_internal@absl@@YA?AUGraphId@12@XZ
+    ?IsAborted@absl@@YA_NABVStatus@1@@Z
+    ?IsAlreadyExists@absl@@YA_NABVStatus@1@@Z
+    ?IsBtree@CordRep@cord_internal@absl@@QBE_NXZ
+    ?IsCancelled@absl@@YA_NABVStatus@1@@Z
+    ?IsCooperative@SpinLock@base_internal@absl@@CA_NW4SchedulingMode@23@@Z
+    ?IsCrc@CordRep@cord_internal@absl@@QBE_NXZ
+    ?IsDataEdge@cord_internal@absl@@YA_NPBUCordRep@12@@Z
+    ?IsDataLoss@absl@@YA_NABVStatus@1@@Z
+    ?IsDeadlineExceeded@absl@@YA_NABVStatus@1@@Z
+    ?IsEmpty@Queue@CordzHandle@cord_internal@absl@@QBE_NXZ
+    ?IsExternal@CordRep@cord_internal@absl@@QBE_NXZ
+    ?IsFailedPrecondition@absl@@YA_NABVStatus@1@@Z
+    ?IsFatal@LogMessage@log_internal@absl@@ABE_NXZ
+    ?IsFlat@CordRep@cord_internal@absl@@QBE_NXZ
+    ?IsFlat@CordRepBtree@cord_internal@absl@@QBE_NIIPAVstring_view@3@@Z
+    ?IsFlat@CordRepBtree@cord_internal@absl@@QBE_NPAVstring_view@3@@Z
+    ?IsHashtablezEnabled@container_internal@absl@@YA_NXZ
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+    ?MaxFramesInLogStackTrace@log_internal@absl@@YAHXZ
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+    ?ReaderLockWhenWithTimeout@Mutex@absl@@QAE_NABVCondition@2@VDuration@2@@Z
+    ?ReaderTryLock@Mutex@absl@@QAE_NXZ
+    ?ReaderUnlock@Mutex@absl@@QAEXXZ
+    ?Rebuild@CordRepBtree@cord_internal@absl@@CAXPAPAV123@PAV123@_N@Z
+    ?Rebuild@CordRepBtree@cord_internal@absl@@SAPAV123@PAV123@@Z
+    ?RecordInsertSlow@container_internal@absl@@YAXPAUHashtablezInfo@12@II@Z
+    ?Ref@CordRep@cord_internal@absl@@SAPAU123@PAU123@@Z
+    ?Ref@Status@absl@@CAXI@Z
+    ?RefCordRep@CordzInfo@cord_internal@absl@@QBEPAUCordRep@23@XZ
+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPBDH000@Z@Z
+    ?RegisterCondVarTracer@absl@@YAXP6AXPBDPBX@Z@Z
+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQBQAXHP6AXPBDPAX@Z2@Z@Z
+    ?RegisterInternalLogFunction@raw_log_internal@absl@@YAXP6AXW4LogSeverity@2@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?RegisterLogFilterAndPrefixHook@raw_log_internal@absl@@YAXP6A_NW4LogSeverity@2@PBDHPAPADPAH@Z@Z
+    ?RegisterMutexProfiler@absl@@YAXP6AX_J@Z@Z
+    ?RegisterMutexTracer@absl@@YAXP6AXPBDPBX_J@Z@Z
+    ?RegisterSpinLockProfiler@base_internal@absl@@YAXP6AXPBX_J@Z@Z
+    ?RegisterSymbolizer@absl@@YAXP6A_NPBXPADH@Z@Z
+    ?Release@?$AllocationTransaction@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QHAE?AU?$Allocation@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@23@XZ
+    ?Release@?$AllocationTransaction@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QHAE?AU?$Allocation@V?$allocator@PAVLogSink@absl@@@Cr@std@@@23@XZ
+    ?Release@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QHAE?AU?$Allocation@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@23@XZ
+    ?Release@ReleasableMutexLock@absl@@QAEXXZ
+    ?Remove@CondVar@absl@@AAEXPAUPerThreadSynch@base_internal@2@@Z
+    ?RemoveChunkPrefix@ChunkIterator@Cord@absl@@AAEXI@Z
+    ?RemoveCrcNode@cord_internal@absl@@YAPAUCordRep@12@PAU312@@Z
+    ?RemoveEdge@GraphCycles@synchronization_internal@absl@@QAEXUGraphId@23@0@Z
+    ?RemoveExtraAsciiWhitespace@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?RemoveLogSink@log_internal@absl@@YAXPAVLogSink@2@@Z
+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QAEXPAX@Z
+    ?RemovePrefix@Cord@absl@@QAEXI@Z
+    ?RemovePrefix@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@II@Z
+    ?RemoveSuffix@Cord@absl@@QAEXI@Z
+    ?RemoveSuffix@CordRepBtree@cord_internal@absl@@SAPAUCordRep@23@PAV123@I@Z
+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@II@Z
+    ?RepToPointer@Status@absl@@CAPAUStatusRep@status_internal@2@I@Z
+    ?Reset@?$AllocationTransaction@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AAEXXZ
+    ?Reset@?$AllocationTransaction@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AAEXXZ
+    ?Reset@?$AllocationTransaction@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AAEXXZ
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AAE_NABV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?ResetToEmpty@InlineRep@Cord@absl@@AAEXXZ
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@I@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPAUCordRep@12@V?$FunctionRef@$$A6AXPAUCordRep@cord_internal@absl@@II@Z@2@@Z
+    ?RoundUp@cord_internal@absl@@YAIII@Z
+    ?RoundUpForTag@cord_internal@absl@@YAII@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QBE_NXZ
+    ?SampleSlow@container_internal@absl@@YAPAUHashtablezInfo@12@AAUSamplingState@12@I@Z
+    ?Seek@CordRepBtreeNavigator@cord_internal@absl@@QAE?AUPosition@123@I@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QAE?AVstring_view@3@I@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AAEXXZ
+    ?SetAllocation@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXU?$Allocation@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@23@@Z
+    ?SetAllocation@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXU?$Allocation@V?$allocator@PAVLogSink@absl@@@Cr@std@@@23@@Z
+    ?SetAllocation@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXU?$Allocation@V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@23@@Z
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QAEXI@Z
+    ?SetConversionChar@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXW4FormatConversionChar@3@PAVFormatConversionSpecImpl@23@@Z
+    ?SetCordRep@CordzInfo@cord_internal@absl@@QAEXPAUCordRep@23@@Z
+    ?SetCordRep@CordzUpdateScope@cord_internal@absl@@QBEXPAUCordRep@23@@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPAUThreadIdentity@12@P6AXPAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QAEXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IAEXXZ
+    ?SetFlags@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXW4Flags@23@PAVFormatConversionSpecImpl@23@@Z
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAXI@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAXI@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetInlinedSize@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXI@Z
+    ?SetIsAllocated@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXXZ
+    ?SetIsAllocated@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXXZ
+    ?SetIsAllocated@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXXZ
+    ?SetLength@CordBuffer@absl@@QAEXI@Z
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMaxSamples@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QAEXI@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QAEXVstring_view@2@VCord@2@@Z
+    ?SetPrecision@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXHPAVFormatConversionSpecImpl@23@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPAPAXPAHHHPBX1@Z@Z
+    ?SetStatusPayloadPrinter@status_internal@absl@@YAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@ABVCord@2@@Z@Z
+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QAEXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QAEXXZ
+    ?SetTree@InlineRep@Cord@absl@@QAEXPAUCordRep@cord_internal@3@ABVCordzUpdateScope@53@@Z
+    ?SetTreeOrEmpty@InlineRep@Cord@absl@@QAEXPAUCordRep@cord_internal@3@ABVCordzUpdateScope@53@@Z
+    ?SetValue@?$Manager@D$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@ABD@Z
+    ?SetValue@?$Manager@H$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@ABH@Z
+    ?SetValue@?$Manager@I$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@ABI@Z
+    ?SetValue@?$Manager@Vstring_view@absl@@$0A@@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@ABVstring_view@4@@Z
+    ?SetValue@?$Manager@_J$01@FormatArgImpl@str_format_internal@absl@@SA?ATData@234@AB_J@Z
+    ?SetWidth@FormatConversionSpecImplFriend@str_format_internal@absl@@SAXHPAVFormatConversionSpecImpl@23@@Z
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QAEXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QAEXH@Z
+    ?ShouldInsertBackwards@container_internal@absl@@YA_NIPBW4ctrl_t@12@@Z
+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QAE_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QAE_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QAE_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QAE_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QAEXXZ
+    ?SignalAll@CondVar@absl@@QAEXXZ
+    ?SignedAddResult@int128_internal@absl@@YA?AVint128@2@V32@0@Z
+    ?SignedSubstructResult@int128_internal@absl@@YA?AVint128@2@V32@00@Z
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YAINPAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SAIXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SAIXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QAE?AUPosition@123@I@Z
+    ?SkipCrcNode@cord_internal@absl@@YAPAUCordRep@12@PAU312@@Z
+    ?SkipCrcNode@cord_internal@absl@@YAPBUCordRep@12@PBU312@@Z
+    ?SleepFor@absl@@YAXVDuration@1@@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AAEXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AAEXI@Z
+    ?SnprintF@str_format_internal@absl@@YAHPADIVUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SpinLockDelay@base_internal@absl@@YAXPAU?$atomic@I@Cr@std@@IHW4SchedulingMode@12@@Z
+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPAU?$atomic@I@Cr@std@@HQBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
+    ?SpinLockWake@base_internal@absl@@YAXPAU?$atomic@I@Cr@std@@_N@Z
+    ?SpinLoop@SpinLock@base_internal@absl@@AAEIXZ
+    ?StackTraceWorksForTest@debugging_internal@absl@@YA_NXZ
+    ?StartsWith@absl@@YA_NVstring_view@1@0@Z
+    ?StartsWithIgnoreCase@absl@@YA_NVstring_view@1@0@Z
+    ?StatusCodeToString@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusCode@1@@Z
+    ?StderrThreshold@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?Store@?$AtomicHook@P6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@absl@@Vstring_view@2@ABVCord@2@@Z@base_internal@absl@@QAEXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@3@Vstring_view@3@ABVCord@3@@Z@Z
+    ?Store@?$AtomicHook@P6AXPBDH000@Z@base_internal@absl@@QAEXP6AXPBDH000@Z@Z
+    ?Store@?$AtomicHook@P6AXPBDPBX@Z@base_internal@absl@@QAEXP6AXPBDPBX@Z@Z
+    ?Store@?$AtomicHook@P6AXPBDPBX_J@Z@base_internal@absl@@QAEXP6AXPBDPBX_J@Z@Z
+    ?Store@?$AtomicHook@P6AXPBX_J@Z@base_internal@absl@@QAEXP6AXPBX_J@Z@Z
+    ?Store@?$AtomicHook@P6AXW4LogSeverity@absl@@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QAEXP6AXW4LogSeverity@3@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?Store@?$AtomicHook@P6AXXZ@base_internal@absl@@QAEXP6AXXZ@Z
+    ?Store@?$AtomicHook@P6AX_J@Z@base_internal@absl@@QAEXP6AX_J@Z@Z
+    ?Store@?$AtomicHook@P6A_NPBXPADH@Z@base_internal@absl@@QAEXP6A_NPBXPADH@Z@Z
+    ?Store@?$AtomicHook@P6A_NW4LogSeverity@absl@@PBDHPAPADPAH@Z@base_internal@absl@@QAEXP6A_NW4LogSeverity@3@PBDHPAPADPAH@Z@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@111@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@11@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@1@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@000@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@00@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@0@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@@Z
+    ?StrError@base_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@H@Z
+    ?StrReplaceAll@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ?StrReplaceAll@absl@@YAHV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@3@@Z
+    ?StripAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StripLeadingAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StripTrailingAsciiWhitespace@absl@@YA?AVstring_view@1@V21@@Z
+    ?StrlenInternal@string_view@absl@@CAIPBD@Z
+    ?SubLength@CordRepRing@cord_internal@absl@@AAEXII@Z
+    ?SubRing@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@III@Z
+    ?SubTree@CordRepBtree@cord_internal@absl@@QAEPAUCordRep@23@II@Z
+    ?Subcord@Cord@absl@@QBE?AV12@II@Z
+    ?SubstituteAndAppendArray@substitute_internal@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@2@PBV62@I@Z
+    ?Substring@CordRepSubstring@cord_internal@absl@@SAPAUCordRep@23@PAU423@II@Z
+    ?SubstructResult@int128_internal@absl@@YA?AVuint128@2@V32@00@Z
+    ?SubtractSize@?$Storage@H$0CP@V?$allocator@H@Cr@std@@@inlined_vector_internal@absl@@QAEXI@Z
+    ?SubtractSize@?$Storage@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXI@Z
+    ?SubtractSize@?$Storage@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXI@Z
+    ?SubtractSize@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEXI@Z
+    ?Summarize@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SuppressSigabortTrace@log_internal@absl@@YA_NXZ
+    ?Symbolize@absl@@YA_NPBXPADH@Z
+    ?TagToAllocatedSize@cord_internal@absl@@YAIE@Z
+    ?TagToLength@cord_internal@absl@@YAIE@Z
+    ?TakeRep@Cord@absl@@AGBEPAUCordRep@cord_internal@2@XZ
+    ?TakeRep@Cord@absl@@AHAEPAUCordRep@cord_internal@2@XZ
+    ?ThreadIsLoggingToLogSink@log_internal@absl@@YA_NXZ
+    ?ThrowBadStatusOrAccess@internal_statusor@absl@@YAXVStatus@2@@Z
+    ?ThrowBadVariantAccess@variant_internal@absl@@YAXXZ
+    ?ThrowSeedGenException@random_internal@absl@@YAXXZ
+    ?ThrowStdBadAlloc@base_internal@absl@@YAXXZ
+    ?ThrowStdBadFunctionCall@base_internal@absl@@YAXXZ
+    ?ThrowStdDomainError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdDomainError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPBD@Z
+    ?Tick@PerThreadSem@synchronization_internal@absl@@SAXPAUThreadIdentity@base_internal@3@@Z
+    ?TimeFromTimespec@absl@@YA?AVTime@1@Utimespec@@@Z
+    ?TimeFromTimeval@absl@@YA?AVTime@1@Utimeval@@@Z
+    ?TimeLocal@TimeZoneInfo@cctz@time_internal@absl@@ABE?AUcivil_lookup@time_zone@234@ABV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@234@_J@Z
+    ?TimeZone@log_internal@absl@@YAPBV02@XZ
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+    ?front@string_view@absl@@QBEABDXZ
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+    ?second@?$__compressed_pair@PAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QAEAAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PAVFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QBEABV?$allocator@VFormatArgImpl@str_format_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PAVTimeZoneIf@cctz@time_internal@absl@@U?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEAAU?$default_delete@VTimeZoneIf@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PAVTimeZoneInfo@cctz@time_internal@absl@@U?$default_delete@VTimeZoneInfo@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEAAU?$default_delete@VTimeZoneInfo@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PAVZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEAAU?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@PBVImpl@time_zone@cctz@time_internal@absl@@U?$default_delete@$$CBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEAAU?$default_delete@$$CBVImpl@time_zone@cctz@time_internal@absl@@@23@XZ
+    ?second@?$__compressed_pair@U?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@V?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@23@@Cr@std@@QAEAAV?$allocator@U?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@23@XZ
+    ?second@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QBEHXZ
+    ?second@?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@absl@@QBEHXZ
+    ?set_arg@BoundConversion@str_format_internal@absl@@QAEXPBVFormatArgImpl@23@@Z
+    ?set_begin@CordRepBtree@cord_internal@absl@@AAEXI@Z
+    ?set_conversion_char@FormatConversionSpecImpl@str_format_internal@absl@@QAEXW4FormatConversionChar@3@@Z
+    ?set_cordz_info@InlineData@cord_internal@absl@@QAEXPAVCordzInfo@23@@Z
+    ?set_cordz_mean_interval@cord_internal@absl@@YAXH@Z
+    ?set_data@InlineRep@Cord@absl@@QAEPADI@Z
+    ?set_data@InlineRep@Cord@absl@@QAEXPBDI@Z
+    ?set_end@CordRepBtree@cord_internal@absl@@AAEXI@Z
+    ?set_from_arg@InputValue@UnboundConversion@str_format_internal@absl@@QAEXH@Z
+    ?set_inline_size@InlineData@cord_internal@absl@@QAEXI@Z
+    ?set_inline_size@InlineRep@Cord@absl@@AAEXI@Z
+    ?set_short_length@Rep@CordBuffer@absl@@QAEXI@Z
+    ?set_tree@InlineData@cord_internal@absl@@QAEXPAUCordRep@23@@Z
+    ?set_value@InputValue@UnboundConversion@str_format_internal@absl@@QAEXH@Z
+    ?shrink_to_fit@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXXZ
+    ?size@?$BigUnsigned@$03@strings_internal@absl@@QBEHXZ
+    ?size@?$BigUnsigned@$0FE@@strings_internal@absl@@QBEHXZ
+    ?size@?$InlinedVector@H$0CP@V?$allocator@H@Cr@std@@@absl@@QBEIXZ
+    ?size@?$InlinedVector@PAUCordRep@cord_internal@absl@@$01V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QBEIXZ
+    ?size@?$InlinedVector@PAUCordRep@cord_internal@absl@@$0CP@V?$allocator@PAUCordRep@cord_internal@absl@@@Cr@std@@@absl@@QBEIXZ
+    ?size@?$InlinedVector@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@absl@@QBEIXZ
+    ?size@?$InlinedVector@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@absl@@QBEIXZ
+    ?size@?$Span@$$CBD@absl@@QBEIXZ
+    ?size@?$Span@$$CBI@absl@@QBEIXZ
+    ?size@?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@absl@@QBEIXZ
+    ?size@?$Span@D@absl@@QBEIXZ
+    ?size@?$Span@E@absl@@QBEIXZ
+    ?size@?$Span@G@absl@@QBEIXZ
+    ?size@?$Span@I@absl@@QBEIXZ
+    ?size@?$Span@PAVLogSink@absl@@@absl@@QBEIXZ
+    ?size@?$Span@QAUCordRep@cord_internal@absl@@@absl@@QBEIXZ
+    ?size@?$Span@VFormatArgImpl@str_format_internal@absl@@@absl@@QBEIXZ
+    ?size@?$Span@_K@absl@@QBEIXZ
+    ?size@?$__bucket_list_deallocator@V?$allocator@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QAEAAIXZ
+    ?size@?$__bucket_list_deallocator@V?$allocator@PAU?$__hash_node_base@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AAEAAIXZ
+    ?size@?$__split_buffer@PAPBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$deque@PBVImpl@time_zone@cctz@time_internal@absl@@V?$allocator@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@QBEIXZ
+    ?size@?$initializer_list@VFormatArgImpl@str_format_internal@absl@@@std@@QBEIXZ
+    ?size@?$initializer_list@W4FormatConversionCharSet@absl@@@std@@QBEIXZ
+    ?size@?$vector@PAVCordzHandle@cord_internal@absl@@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@PAVLogSink@absl@@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@PBVCordzHandle@cord_internal@absl@@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@UConversionItem@ParsedFormatBase@str_format_internal@absl@@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@UTransition@cctz@time_internal@absl@@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@UTransitionType@cctz@time_internal@absl@@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QBEIXZ
+    ?size@AlphaNum@absl@@QBEIXZ
+    ?size@Cord@absl@@QBEIXZ
+    ?size@CordRepBtree@cord_internal@absl@@QBEIXZ
+    ?size@InlineRep@Cord@absl@@QBEIXZ
+    ?size@string_view@absl@@QBEIXZ
+    ?source_basename@LogEntry@absl@@QBE?AVstring_view@2@XZ
+    ?source_line@LogEntry@absl@@QBEHXZ
+    ?stacktrace@LogEntry@absl@@QBE?AVstring_view@2@XZ
+    ?status@BadStatusOrAccess@absl@@QBEABVStatus@2@XZ
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Uday_tag@1234@U51234@_J@Z
+    ?step@detail@cctz@time_internal@absl@@YA?AUfields@1234@Usecond_tag@1234@U51234@_J@Z
+    ?store@?$__atomic_base@PAVCordzHandle@cord_internal@absl@@$0A@@Cr@std@@QAEXPAVCordzHandle@cord_internal@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@PAVCordzInfo@cord_internal@absl@@$0A@@Cr@std@@QAEXPAVCordzInfo@cord_internal@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@W4OnDeadlockCycle@absl@@$0A@@Cr@std@@QAEXW4OnDeadlockCycle@absl@@W4memory_order@23@@Z
+    ?store@?$__atomic_base@W4State@PerThreadSynch@base_internal@absl@@$0A@@Cr@std@@QAEXW4State@PerThreadSynch@base_internal@absl@@W4memory_order@23@@Z
+    ?str@UntypedFormatSpecImpl@str_format_internal@absl@@QBE?AVstring_view@3@XZ
+    ?sub_fetch_begin@CordRepBtree@cord_internal@absl@@AAEII@Z
+    ?substr@string_view@absl@@QBE?AV12@II@Z
+    ?substring@CordRep@cord_internal@absl@@QAEPAUCordRepSubstring@23@XZ
+    ?substring@CordRep@cord_internal@absl@@QBEPBUCordRepSubstring@23@XZ
+    ?tag@InlineData@cord_internal@absl@@AAEAACXZ
+    ?tag@InlineData@cord_internal@absl@@ABECXZ
+    ?tail@CordRepRing@cord_internal@absl@@QBEIXZ
+    ?text_message_with_prefix_and_newline@LogEntry@absl@@QBE?AVstring_view@2@XZ
+    ?text_message_with_prefix_and_newline_c_str@LogEntry@absl@@QBEPBDXZ
+    ?thread_identity@PerThreadSynch@base_internal@absl@@QAEPAUThreadIdentity@23@XZ
+    ?throw_bad_optional_access@optional_internal@absl@@YAXXZ
+    ?tid@LogEntry@absl@@QBEIXZ
+    ?timestamp@LogEntry@absl@@QBE?AVTime@2@XZ
+    ?total_written@BufferRawSink@str_format_internal@absl@@QBEIXZ
+    ?tree@InlineRep@Cord@absl@@QBEPAUCordRep@cord_internal@3@XZ
+    ?utc_time_zone@cctz@time_internal@absl@@YA?AVtime_zone@123@XZ
+    ?value@?$optional@I@absl@@QGAEAAIXZ
+    ?value@InputValue@UnboundConversion@str_format_internal@absl@@QBEHXZ
+    ?version@time_zone@cctz@time_internal@absl@@QBE?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?what@BadStatusOrAccess@absl@@UBEPBDXZ
+    ?what@SeedGenException@absl@@UBEPBDXZ
+    ?what@bad_optional_access@absl@@UBEPBDXZ
+    ?what@bad_variant_access@absl@@UBEPBDXZ
+    ?width@FormatConversionSpecImpl@str_format_internal@absl@@QBEHXZ
+    ?words@?$BigUnsigned@$03@strings_internal@absl@@QBEPBIXZ
+    ?words@?$BigUnsigned@$0FE@@strings_internal@absl@@QBEPBIXZ
+    ?xsputn@LogEntryStreambuf@log_internal@absl@@MAEHPBDH@Z
+    ?xsputn@Streambuf@OStringStream@strings_internal@absl@@MAEHPBDH@Z
+    ?year@?$civil_time@Uday_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QBE_JXZ
+    ?year@?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QBE_JXZ
+    ?year@?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@absl@@QBE_JXZ
+    ?year@?$civil_time@Uyear_tag@detail@cctz@time_internal@absl@@@detail@cctz@time_internal@absl@@QBE_JXZ
+    ?year_index@impl@detail@cctz@time_internal@absl@@YAH_JC@Z
+    ?ymd_ord@impl@detail@cctz@time_internal@absl@@YA_J_JCC@Z
diff --git a/third_party/abseil-cpp/symbols_x86_rel.def b/third_party/abseil-cpp/symbols_x86_rel.def
new file mode 100644
index 0000000000..d94c7c01b3
--- /dev/null
+++ b/third_party/abseil-cpp/symbols_x86_rel.def
@@ -0,0 +1,1097 @@
+EXPORTS
+    ??$?0ABVCord@absl@@@?$optional_data_dtor_base@VCord@absl@@$0A@@optional_internal@absl@@IAE@Uin_place_t@2@ABVCord@2@@Z
+    ??$?0PAI@?$SaltedSeedSeq@Vseed_seq@Cr@std@@@random_internal@absl@@QAE@PAI0@Z
+    ??$?0V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QAE@$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6C@LogMessage@log_internal@absl@@QAEAAV012@ABC@Z
+    ??$?6D@LogMessage@log_internal@absl@@QAEAAV012@ABD@Z
+    ??$?6E@LogMessage@log_internal@absl@@QAEAAV012@ABE@Z
+    ??$?6F@LogMessage@log_internal@absl@@QAEAAV012@ABF@Z
+    ??$?6G@LogMessage@log_internal@absl@@QAEAAV012@ABG@Z
+    ??$?6H@LogMessage@log_internal@absl@@QAEAAV012@ABH@Z
+    ??$?6I@LogMessage@log_internal@absl@@QAEAAV012@ABI@Z
+    ??$?6J@LogMessage@log_internal@absl@@QAEAAV012@ABJ@Z
+    ??$?6K@LogMessage@log_internal@absl@@QAEAAV012@ABK@Z
+    ??$?6M@LogMessage@log_internal@absl@@QAEAAV012@ABM@Z
+    ??$?6N@LogMessage@log_internal@absl@@QAEAAV012@ABN@Z
+    ??$?6PAX@LogMessage@log_internal@absl@@QAEAAV012@ABQAX@Z
+    ??$?6PBX@LogMessage@log_internal@absl@@QAEAAV012@ABQBX@Z
+    ??$?6V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@LogMessage@log_internal@absl@@QAEAAV012@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$?6Vstring_view@absl@@@LogMessage@log_internal@absl@@QAEAAV012@ABVstring_view@2@@Z
+    ??$?6_J@LogMessage@log_internal@absl@@QAEAAV012@AB_J@Z
+    ??$?6_K@LogMessage@log_internal@absl@@QAEAAV012@AB_K@Z
+    ??$?6_N@LogMessage@log_internal@absl@@QAEAAV012@AB_N@Z
+    ??$?MUsecond_tag@detail@cctz@time_internal@absl@@U01234@@detail@cctz@time_internal@absl@@YA_NABV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@0123@0@Z
+    ??$?RW4LogSeverity@absl@@ABQBDHAAPBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QBEX$$QAW4LogSeverity@2@ABQBD$$QAHAAPBD@Z
+    ??$?RW4LogSeverity@absl@@ABQBDHAAY0CC@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QBEX$$QAW4LogSeverity@2@ABQBD$$QAHAAY0CC@$$CBD@Z
+    ??$?RW4LogSeverity@absl@@ABQBDHAAY0CG@$$CBD@?$AtomicHook@P6AXW4LogSeverity@absl@@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@base_internal@absl@@QBEX$$QAW4LogSeverity@2@ABQBD$$QAHAAY0CG@$$CBD@Z
+    ??$AddCordRep@$00@CordRepBtree@cord_internal@absl@@CAPAV012@PAV012@PAUCordRep@12@@Z
+    ??$AddCordRep@$0A@@CordRepBtree@cord_internal@absl@@CAPAV012@PAV012@PAUCordRep@12@@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@AAE?AVstring_view@2@V32@I@Z
+    ??$AddData@$00@CordRepBtree@cord_internal@absl@@CAPAV012@PAV012@Vstring_view@2@I@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@AAE?AVstring_view@2@V32@I@Z
+    ??$AddData@$0A@@CordRepBtree@cord_internal@absl@@CAPAV012@PAV012@Vstring_view@2@I@Z
+    ??$AddRing@$00@CordRepRing@cord_internal@absl@@CAPAV012@PAV012@0II@Z
+    ??$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPAV012@PAV012@0II@Z
+    ??$Append@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QAEX$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$AppendImpl@ABVCord@absl@@@Cord@absl@@AAEXABV01@@Z
+    ??$AppendImpl@VCord@absl@@@Cord@absl@@AAEX$$QAV01@@Z
+    ??$Base64EscapeInternal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPBEIPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@_NPBD@Z
+    ??$CallOnceImpl@A6AXXZ$$V@base_internal@absl@@YAXPAU?$atomic@I@Cr@std@@W4SchedulingMode@01@A6AXXZ@Z
+    ??$CastAndCallFunction@$$CBU?$atomic@_N@Cr@std@@@Condition@absl@@CA_NPBV01@@Z
+    ??$Compare@$0FE@$0FE@@strings_internal@absl@@YAHABV?$BigUnsigned@$0FE@@01@0@Z
+    ??$ConstructElements@V?$allocator@PAVLogSink@absl@@@Cr@std@@V?$IteratorValueAdapter@V?$allocator@PAVLogSink@absl@@@Cr@std@@V?$move_iterator@PAPAVLogSink@absl@@@23@@inlined_vector_internal@absl@@@inlined_vector_internal@absl@@YAXAAV?$allocator@PAVLogSink@absl@@@Cr@std@@PAPAVLogSink@1@AAV?$IteratorValueAdapter@V?$allocator@PAVLogSink@absl@@@Cr@std@@V?$move_iterator@PAPAVLogSink@absl@@@23@@01@I@Z
+    ??$Dispatch@C@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@D@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@E@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@F@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@G@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@H@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@I@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@M@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@O@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@PBD@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@UVoidPtr@str_format_internal@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@Vint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@Vstring_view@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@Vuint128@absl@@@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@_J@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@_K@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$Dispatch@_N@FormatArgImpl@str_format_internal@absl@@CA_NTData@012@VFormatConversionSpecImpl@12@PAX@Z
+    ??$DivMod@$09@?$BigUnsigned@$03@strings_internal@absl@@AAEIXZ
+    ??$DivMod@$09@?$BigUnsigned@$0FE@@strings_internal@absl@@AAEIXZ
+    ??$EmplaceBack@ABQAVLogSink@absl@@@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAPAVLogSink@2@ABQAV32@@Z
+    ??$EmplaceBack@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@QAEAAUPayload@status_internal@2@$$QAU342@@Z
+    ??$EmplaceBackSlow@ABQAVLogSink@absl@@@?$Storage@PAVLogSink@absl@@$0BA@V?$allocator@PAVLogSink@absl@@@Cr@std@@@inlined_vector_internal@absl@@AAEAAPAVLogSink@2@ABQAV32@@Z
+    ??$EmplaceBackSlow@UPayload@status_internal@absl@@@?$Storage@UPayload@status_internal@absl@@$00V?$allocator@UPayload@status_internal@absl@@@Cr@std@@@inlined_vector_internal@absl@@AAEAAUPayload@status_internal@2@$$QAU342@@Z
+    ??$Fill@$00@CordRepRing@cord_internal@absl@@AAEXPBV012@II@Z
+    ??$Fill@$0A@@CordRepRing@cord_internal@absl@@AAEXPBV012@II@Z
+    ??$FindSubstitutions@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@strings_internal@absl@@YA?AV?$vector@UViableSubstitution@strings_internal@absl@@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@Vstring_view@1@ABV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ??$Flush@V?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$Flush@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$Flush@VBufferRawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$Flush@VFILERawSink@str_format_internal@absl@@@FormatRawSinkImpl@str_format_internal@absl@@CAXPAXVstring_view@2@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPAV234@PAV234@0II@Z@@CordRepRing@cord_internal@absl@@QBEXII$$QAV<lambda_1>@?0???$AddRing@$00@012@CAPAV012@PAV012@0II@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPAV234@PAV234@0II@Z@@CordRepRing@cord_internal@absl@@QBEXII$$QAV<lambda_1>@?0???$AddRing@$0A@@012@CAPAV012@PAV012@0II@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$Fill@$00@CordRepRing@cord_internal@absl@@AAEXPBV234@II@Z@@CordRepRing@cord_internal@absl@@QBEXII$$QAV<lambda_1>@?0???$Fill@$00@012@AAEXPBV012@II@Z@@Z
+    ??$ForEach@V<lambda_1>@?0???$Fill@$0A@@CordRepRing@cord_internal@absl@@AAEXPBV234@II@Z@@CordRepRing@cord_internal@absl@@QBEXII$$QAV<lambda_1>@?0???$Fill@$0A@@012@AAEXPBV012@II@Z@@Z
+    ??$ForEach@V<lambda_2>@?0???$AddRing@$00@CordRepRing@cord_internal@absl@@CAPAV234@PAV234@0II@Z@@CordRepRing@cord_internal@absl@@QBEXII$$QAV<lambda_2>@?0???$AddRing@$00@012@CAPAV012@PAV012@0II@Z@@Z
+    ??$ForEach@V<lambda_2>@?0???$AddRing@$0A@@CordRepRing@cord_internal@absl@@CAPAV234@PAV234@0II@Z@@CordRepRing@cord_internal@absl@@QBEXII$$QAV<lambda_2>@?0???$AddRing@$0A@@012@CAPAV012@PAV012@0II@Z@@Z
+    ??$GenericCompare@HVCord@absl@@@absl@@YAHABVCord@0@0I@Z
+    ??$GenericCompare@HVstring_view@absl@@@absl@@YAHABVCord@0@ABVstring_view@0@I@Z
+    ??$GenericCompare@_NVCord@absl@@@absl@@YA_NABVCord@0@0I@Z
+    ??$GenericCompare@_NVstring_view@absl@@@absl@@YA_NABVCord@0@ABVstring_view@0@I@Z
+    ??$Merge@$00@CordRepBtree@cord_internal@absl@@CAPAV012@PAV012@0@Z
+    ??$Merge@$0A@@CordRepBtree@cord_internal@absl@@CAPAV012@PAV012@0@Z
+    ??$NewImpl@$0BAAA@$$V@CordRepFlat@cord_internal@absl@@SAPAU012@I@Z
+    ??$NewImpl@$0EAAAA@$$V@CordRepFlat@cord_internal@absl@@SAPAU012@I@Z
+    ??$NewLeaf@$00@CordRepBtree@cord_internal@absl@@CAPAV012@Vstring_view@2@I@Z
+    ??$NewLeaf@$0A@@CordRepBtree@cord_internal@absl@@CAPAV012@Vstring_view@2@I@Z
+    ??$ParseFloat@$09@strings_internal@absl@@YA?AUParsedFloat@01@PBD0W4chars_format@1@@Z
+    ??$ParseFloat@$0BA@@strings_internal@absl@@YA?AUParsedFloat@01@PBD0W4chars_format@1@@Z
+    ??$ParseFormatString@UParsedFormatConsumer@ParsedFormatBase@str_format_internal@absl@@@str_format_internal@absl@@YA_NVstring_view@1@UParsedFormatConsumer@ParsedFormatBase@01@@Z
+    ??$PopDead@_JI@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AAEPAUHashtablezInfo@container_internal@2@_JI@Z
+    ??$Prepend@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@$0A@@Cord@absl@@QAEX$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$Register@AB_JAAI@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@QAEPAUHashtablezInfo@container_internal@2@AB_JAAI@Z
+    ??$SNPrintF@DHHH@absl@@YAHPADIABV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@@str_format_internal@0@ABDABH33@Z
+    ??$STLStringResizeUninitializedAmortized@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@strings_internal@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@I@Z
+    ??$SetEdge@$00@CordRepBtree@cord_internal@absl@@QAE?AUOpResult@012@_NPAUCordRep@12@I@Z
+    ??$SetEdge@$0A@@CordRepBtree@cord_internal@absl@@QAE?AUOpResult@012@_NPAUCordRep@12@I@Z
+    ??$StrFormat@DHHHHH_JIVstring_view@absl@@HV12@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABV?$FormatSpecTemplate@$0BPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0JPPPL@$0IAAAE@$0JPPPL@$0IAAAE@@str_format_internal@0@ABDABH2222AB_JABIABVstring_view@0@25@Z
+    ??$StrReplaceAll@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@0@ABV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@3@@Z
+    ??$StrReplaceAll@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@@absl@@YAHABV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@2@@Z
+    ??$__allocate_at_least@V?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@01@AAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@PAVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPAVCordzHandle@cord_internal@absl@@@01@AAV?$allocator@PAVCordzHandle@cord_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@PAVLogSink@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPAVLogSink@absl@@@01@AAV?$allocator@PAVLogSink@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@PBVCordzHandle@cord_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAPBVCordzHandle@cord_internal@absl@@@01@AAV?$allocator@PBVCordzHandle@cord_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@AAV?$allocator@UConversionItem@ParsedFormatBase@str_format_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUTransition@cctz@time_internal@absl@@@01@AAV?$allocator@UTransition@cctz@time_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUTransitionType@cctz@time_internal@absl@@@01@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@UViableSubstitution@strings_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAUViableSubstitution@strings_internal@absl@@@01@AAV?$allocator@UViableSubstitution@strings_internal@absl@@@01@I@Z
+    ??$__allocate_at_least@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@YA?AU?$__allocation_result@PAVFormatArgImpl@str_format_internal@absl@@@01@AAV?$allocator@VFormatArgImpl@str_format_internal@absl@@@01@I@Z
+    ??$__construct_at_end@V?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@PAPBVImpl@time_zone@cctz@time_internal@absl@@AAV?$allocator@PAPBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXV?$move_iterator@PAPAPBVImpl@time_zone@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PAUTransition@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransition@cctz@time_internal@absl@@AAV?$allocator@UTransition@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXV?$move_iterator@PAUTransition@cctz@time_internal@absl@@@12@0@Z
+    ??$__construct_at_end@V?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@Cr@std@@@?$__split_buffer@UTransitionType@cctz@time_internal@absl@@AAV?$allocator@UTransitionType@cctz@time_internal@absl@@@Cr@std@@@Cr@std@@QAEXV?$move_iterator@PAUTransitionType@cctz@time_internal@absl@@@12@0@Z
+    ??$__destroy_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@$0A@@Cr@std@@YAXPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@@Z
+    ??$__destroy_at@UPayload@status_internal@absl@@$0A@@Cr@std@@YAXPAUPayload@status_internal@absl@@@Z
+    ??$__do_rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AAEXI@Z
+    ??$__emplace_unique_key_args@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABUpiecewise_construct_t@23@V?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@QAE?AU?$pair@V?$__hash_iterator@PAU?$__hash_node@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@PAX@Cr@std@@@Cr@std@@_N@12@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@12@ABUpiecewise_construct_t@12@$$QAV?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@12@$$QAV?$tuple@$$V@12@@Z
+    ??$__rehash@$00@?$__hash_table@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@V?$__unordered_map_hasher@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$__unordered_map_equal@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@23@U?$equal_to@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@U?$hash@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@$00@23@V?$allocator@U?$__hash_value_type@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@@23@@Cr@std@@AAEXI@Z
+    ??$__upper_bound@U_ClassicAlgPolicy@Cr@std@@UByCivilTime@Transition@cctz@time_internal@absl@@PBU5678@PBU5678@U5678@U__identity@23@@Cr@std@@YAPBUTransition@cctz@time_internal@absl@@PBU2345@0ABU2345@$$QAUByCivilTime@2345@$$QAU__identity@01@@Z
+    ??$assign@PBVFormatArgImpl@str_format_internal@absl@@$0A@@?$vector@VFormatArgImpl@str_format_internal@absl@@V?$allocator@VFormatArgImpl@str_format_internal@absl@@@Cr@std@@@Cr@std@@QAEXPBVFormatArgImpl@str_format_internal@absl@@0@Z
+    ??$assign@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@?$optional_data_base@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@optional_internal@absl@@IAEX$$QAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ??$construct_at@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@Cr@std@@ABUpiecewise_construct_t@23@V?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@23@V?$tuple@$$V@23@PAU123@@Cr@std@@YAPAU?$pair@$$CBV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PBVImpl@time_zone@cctz@time_internal@absl@@@01@PAU201@ABUpiecewise_construct_t@01@$$QAV?$tuple@ABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@01@$$QAV?$tuple@$$V@01@@Z
+    ??$construct_at@UPayload@status_internal@absl@@ABU123@PAU123@@Cr@std@@YAPAUPayload@status_internal@absl@@PAU234@ABU234@@Z
+    ??$construct_at@UTransition@cctz@time_internal@absl@@$$VPAU1234@@Cr@std@@YAPAUTransition@cctz@time_internal@absl@@PAU2345@@Z
+    ??$construct_at@UTransitionType@cctz@time_internal@absl@@$$VPAU1234@@Cr@std@@YAPAUTransitionType@cctz@time_internal@absl@@PAU2345@@Z
+    ??$construct_at@UViableSubstitution@strings_internal@absl@@AAVstring_view@3@ABV43@AAIPAU123@@Cr@std@@YAPAUViableSubstitution@strings_internal@absl@@PAU234@AAVstring_view@4@ABV54@AAI@Z
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+    ?FromUDate@absl@@YA?AVTime@1@N@Z
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+    ?GetHashtablezSampleParameter@container_internal@absl@@YAHXZ
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+    ?LocalTime@TimeZoneInfo@cctz@time_internal@absl@@ABE?AUabsolute_lookup@time_zone@234@_JABUTransition@234@@Z
+    ?LocalTime@TimeZoneInfo@cctz@time_internal@absl@@ABE?AUabsolute_lookup@time_zone@234@_JABUTransitionType@234@@Z
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+    ?Lock@Mutex@absl@@QAEXXZ
+    ?LockSlow@Mutex@absl@@AAEXPBUMuHowS@2@PBVCondition@2@H@Z
+    ?LockSlowLoop@Mutex@absl@@AAEXPAUSynchWaitParams@2@H@Z
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+    ?LogBacktraceIfNeeded@LogMessage@log_internal@absl@@AAEXXZ
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+    ?MaxFramesInLogStackTrace@log_internal@absl@@YAHXZ
+    ?MaybeTrackCordImpl@CordzInfo@cord_internal@absl@@CAXAAVInlineData@23@ABV423@W4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?MergeTrees@CordRepBtree@cord_internal@absl@@CAPAV123@PAV123@0@Z
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+    ?MultiplyBy@?$BigUnsigned@$0FE@@strings_internal@absl@@QAEXI@Z
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+    ?MultiplyStep@?$BigUnsigned@$03@strings_internal@absl@@AAEXHPBIHH@Z
+    ?MultiplyStep@?$BigUnsigned@$0FE@@strings_internal@absl@@AAEXHPBIHH@Z
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+    ?New@CordRepRing@cord_internal@absl@@CAPAV123@II@Z
+    ?NewArena@LowLevelAlloc@base_internal@absl@@SAPAUArena@123@I@Z
+    ?Next@CordzInfo@cord_internal@absl@@QBEPAV123@ABVCordzSnapshot@23@@Z
+    ?NextTransition@TimeZone@absl@@QBE_NVTime@2@PAUCivilTransition@12@@Z
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+    ?NextTransition@TimeZoneLibC@cctz@time_internal@absl@@UBE_NABV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PAUcivil_transition@time_zone@234@@Z
+    ?NoPrefix@LogMessage@log_internal@absl@@QAEAAV123@XZ
+    ?NominalCPUFrequency@base_internal@absl@@YANXZ
+    ?NotFoundError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Notify@Notification@absl@@QAEXXZ
+    ?Now@CycleClock@base_internal@absl@@SA_JXZ
+    ?Now@UnscaledCycleClock@base_internal@absl@@CA_JXZ
+    ?Now@absl@@YA?AVTime@1@XZ
+    ?NumCPUs@base_internal@absl@@YAHXZ
+    ?OneTimeInitThreadIdentity@synchronization_internal@absl@@YAXPAUThreadIdentity@base_internal@2@@Z
+    ?OutOfRangeError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseDuration@absl@@YA_NVstring_view@1@PAVDuration@1@@Z
+    ?ParseFlag@absl@@YA_NABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PAVDuration@1@PAV234@@Z
+    ?ParseFlag@absl@@YA_NABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PAVTime@1@PAV234@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uday_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uhour_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uminute_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Umonth_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Usecond_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParseLenientCivilTime@absl@@YA_NVstring_view@1@PAV?$civil_time@Uyear_tag@time_internal@absl@@@detail@cctz@time_internal@1@@Z
+    ?ParsePosixSpec@cctz@time_internal@absl@@YA_NABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@PAUPosixTimeZone@123@@Z
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+    ?ParseTime@absl@@YA_NVstring_view@1@0VTimeZone@1@PAVTime@1@PAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?PermissionDeniedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Poke@Waiter@synchronization_internal@absl@@QAEXXZ
+    ?Post@Waiter@synchronization_internal@absl@@QAEXXZ
+    ?PrepareForSampling@HashtablezInfo@container_internal@absl@@QAEX_JI@Z
+    ?PrepareToDie@LogMessage@log_internal@absl@@AAEXXZ
+    ?PrepareToModify@Status@absl@@AAEXXZ
+    ?Prepend@Cord@absl@@QAEXABV12@@Z
+    ?Prepend@CordRepBtree@cord_internal@absl@@SAPAV123@PAV123@Vstring_view@3@I@Z
+    ?Prepend@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@PAUCordRep@23@@Z
+    ?Prepend@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@Vstring_view@3@I@Z
+    ?PrependArray@Cord@absl@@AAEXVstring_view@2@W4MethodIdentifier@CordzUpdateTracker@cord_internal@2@@Z
+    ?PrependLeaf@CordRepRing@cord_internal@absl@@CAPAV123@PAV123@PAUCordRep@23@II@Z
+    ?PrependPrecise@Cord@absl@@AAEXVstring_view@2@W4MethodIdentifier@CordzUpdateTracker@cord_internal@2@@Z
+    ?PrependSlow@CordRepBtree@cord_internal@absl@@CAPAV123@PAV123@PAUCordRep@23@@Z
+    ?PrependSlow@CordRepRing@cord_internal@absl@@CAPAV123@PAV123@PAUCordRep@23@@Z
+    ?PrependTree@InlineRep@Cord@absl@@QAEXPAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToInlined@InlineRep@Cord@absl@@QAEXPAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrependTreeToTree@InlineRep@Cord@absl@@QAEXPAUCordRep@cord_internal@3@W4MethodIdentifier@CordzUpdateTracker@53@@Z
+    ?PrevTransition@TimeZone@absl@@QBE_NVTime@2@PAUCivilTransition@12@@Z
+    ?PrevTransition@TimeZoneInfo@cctz@time_internal@absl@@UBE_NABV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PAUcivil_transition@time_zone@234@@Z
+    ?PrevTransition@TimeZoneLibC@cctz@time_internal@absl@@UBE_NABV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$00@Cr@std@@@234@@chrono@Cr@std@@PAUcivil_transition@time_zone@234@@Z
+    ?Print@Streamable@str_format_internal@absl@@QBEAAV?$basic_ostream@DU?$char_traits@D@Cr@std@@@Cr@std@@AAV456@@Z
+    ?Ptr@GraphCycles@synchronization_internal@absl@@QAEPAXUGraphId@23@@Z
+    ?PushDead@?$SampleRecorder@UHashtablezInfo@container_internal@absl@@@profiling_internal@absl@@AAEXPAUHashtablezInfo@container_internal@3@@Z
+    ?PutPaddedString@FormatSinkImpl@str_format_internal@absl@@QAE_NVstring_view@3@HH_N@Z
+    ?RawEnableLogPrefix@log_internal@absl@@YAX_N@Z
+    ?RawLog@raw_log_internal@absl@@YAXW4LogSeverity@2@PBDH1ZZ
+    ?RawLoggingFullySupported@raw_log_internal@absl@@YA_NXZ
+    ?RawSetMinLogLevel@log_internal@absl@@YAXW4LogSeverityAtLeast@2@@Z
+    ?RawSetStderrThreshold@log_internal@absl@@YAXW4LogSeverityAtLeast@2@@Z
+    ?Read@CordRepBtreeNavigator@cord_internal@absl@@QAE?AUReadResult@123@II@Z
+    ?Read@CordRepBtreeReader@cord_internal@absl@@QAE?AVstring_view@3@IIAAPAUCordRep@23@@Z
+    ?ReadDigits@?$BigUnsigned@$03@strings_internal@absl@@AAEHPBD0H@Z
+    ?ReadDigits@?$BigUnsigned@$0FE@@strings_internal@absl@@AAEHPBD0H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$03@strings_internal@absl@@QAEHABUParsedFloat@23@H@Z
+    ?ReadFloatMantissa@?$BigUnsigned@$0FE@@strings_internal@absl@@QAEHABUParsedFloat@23@H@Z
+    ?ReadSeedMaterialFromOSEntropy@random_internal@absl@@YA_NV?$Span@I@2@@Z
+    ?ReaderLock@Mutex@absl@@QAEXXZ
+    ?ReaderLockWhen@Mutex@absl@@QAEXABVCondition@2@@Z
+    ?ReaderLockWhenWithDeadline@Mutex@absl@@QAE_NABVCondition@2@VTime@2@@Z
+    ?ReaderLockWhenWithTimeout@Mutex@absl@@QAE_NABVCondition@2@VDuration@2@@Z
+    ?ReaderTryLock@Mutex@absl@@QAE_NXZ
+    ?ReaderUnlock@Mutex@absl@@QAEXXZ
+    ?Rebuild@CordRepBtree@cord_internal@absl@@CAXPAPAV123@PAV123@_N@Z
+    ?Rebuild@CordRepBtree@cord_internal@absl@@SAPAV123@PAV123@@Z
+    ?RecordInsertSlow@container_internal@absl@@YAXPAUHashtablezInfo@12@II@Z
+    ?Register@CycleClockSource@base_internal@absl@@CAXP6A_JXZ@Z
+    ?RegisterAbortHook@raw_log_internal@absl@@YAXP6AXPBDH000@Z@Z
+    ?RegisterCondVarTracer@absl@@YAXP6AXPBDPBX@Z@Z
+    ?RegisterDebugStackTraceHook@debugging_internal@absl@@YAXP6AXQBQAXHP6AXPBDPAX@Z2@Z@Z
+    ?RegisterInternalLogFunction@raw_log_internal@absl@@YAXP6AXW4LogSeverity@2@PBDHABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z@Z
+    ?RegisterLogFilterAndPrefixHook@raw_log_internal@absl@@YAXP6A_NW4LogSeverity@2@PBDHPAPADPAH@Z@Z
+    ?RegisterMutexProfiler@absl@@YAXP6AX_J@Z@Z
+    ?RegisterMutexTracer@absl@@YAXP6AXPBDPBX_J@Z@Z
+    ?RegisterSpinLockProfiler@base_internal@absl@@YAXP6AXPBX_J@Z@Z
+    ?RegisterSymbolizer@absl@@YAXP6A_NPBXPADH@Z@Z
+    ?Release@ReleasableMutexLock@absl@@QAEXXZ
+    ?Remove@CondVar@absl@@AAEXPAUPerThreadSynch@base_internal@2@@Z
+    ?RemoveEdge@GraphCycles@synchronization_internal@absl@@QAEXUGraphId@23@0@Z
+    ?RemoveExtraAsciiWhitespace@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?RemoveLogSink@log_internal@absl@@YAXPAVLogSink@2@@Z
+    ?RemoveNode@GraphCycles@synchronization_internal@absl@@QAEXPAX@Z
+    ?RemovePrefix@Cord@absl@@QAEXI@Z
+    ?RemovePrefix@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@II@Z
+    ?RemoveSuffix@Cord@absl@@QAEXI@Z
+    ?RemoveSuffix@CordRepBtree@cord_internal@absl@@SAPAUCordRep@23@PAV123@I@Z
+    ?RemoveSuffix@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@II@Z
+    ?ResetToBuiltinUTC@TimeZoneInfo@cctz@time_internal@absl@@AAE_NABV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@@Z
+    ?Resize@?$ResizeUninitializedTraits@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@X@strings_internal@absl@@SAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@I@Z
+    ?ResourceExhaustedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Rethrow@variant_internal@absl@@YAXXZ
+    ?ReverseConsume@cord_internal@absl@@YAXPAUCordRep@12@V?$FunctionRef@$$A6AXPAUCordRep@cord_internal@absl@@II@Z@2@@Z
+    ?SafeToDelete@CordzHandle@cord_internal@absl@@QBE_NXZ
+    ?SampleSlow@container_internal@absl@@YAPAUHashtablezInfo@12@AAUSamplingState@12@I@Z
+    ?Seek@CordRepBtreeReader@cord_internal@absl@@QAE?AVstring_view@3@I@Z
+    ?SendToLog@LogMessage@log_internal@absl@@AAEXXZ
+    ?SetCapacityForTesting@CordRepRing@cord_internal@absl@@QAEXI@Z
+    ?SetCurrentThreadIdentity@base_internal@absl@@YAXPAUThreadIdentity@12@P6AXPAX@Z@Z
+    ?SetExitOnDFatal@log_internal@absl@@YAX_N@Z
+    ?SetExpectedChecksum@Cord@absl@@QAEXI@Z
+    ?SetFailQuietly@LogMessage@log_internal@absl@@IAEXXZ
+    ?SetHashtablezConfigListener@container_internal@absl@@YAXP6AXXZ@Z
+    ?SetHashtablezEnabled@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezEnabledInternal@container_internal@absl@@YAX_N@Z
+    ?SetHashtablezMaxSamples@container_internal@absl@@YAXI@Z
+    ?SetHashtablezMaxSamplesInternal@container_internal@absl@@YAXI@Z
+    ?SetHashtablezSampleParameter@container_internal@absl@@YAXH@Z
+    ?SetHashtablezSampleParameterInternal@container_internal@absl@@YAXH@Z
+    ?SetInitialized@log_internal@absl@@YAXXZ
+    ?SetLogBacktraceLocation@absl@@YAXVstring_view@1@H@Z
+    ?SetLoggingGlobalsListener@log_internal@absl@@YAXP6AXXZ@Z
+    ?SetMaxFramesInLogStackTrace@log_internal@absl@@YAXH@Z
+    ?SetMinLogLevel@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetMutexDeadlockDetectionMode@absl@@YAXW4OnDeadlockCycle@1@@Z
+    ?SetPayload@Status@absl@@QAEXVstring_view@2@VCord@2@@Z
+    ?SetStackUnwinder@absl@@YAXP6AHPAPAXPAHHHPBX1@Z@Z
+    ?SetStatusPayloadPrinter@status_internal@absl@@YAXP6A?AV?$optional@V?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@2@Vstring_view@2@ABVCord@2@@Z@Z
+    ?SetStderrThreshold@absl@@YAXW4LogSeverityAtLeast@1@@Z
+    ?SetSuppressSigabortTrace@log_internal@absl@@YA_N_N@Z
+    ?SetThreadBlockedCounter@PerThreadSem@synchronization_internal@absl@@SAXPAU?$atomic@H@Cr@std@@@Z
+    ?SetTimeZone@log_internal@absl@@YAXVTimeZone@2@@Z
+    ?SetToZero@?$BigUnsigned@$03@strings_internal@absl@@QAEXXZ
+    ?SetToZero@?$BigUnsigned@$0FE@@strings_internal@absl@@QAEXXZ
+    ?ShiftLeft@?$BigUnsigned@$03@strings_internal@absl@@QAEXH@Z
+    ?ShiftLeft@?$BigUnsigned@$0FE@@strings_internal@absl@@QAEXH@Z
+    ?ShouldInsertBackwards@container_internal@absl@@YA_NIPBW4ctrl_t@12@@Z
+    ?ShouldLog@LogEveryNSecState@log_internal@absl@@QAE_NN@Z
+    ?ShouldLog@LogEveryNState@log_internal@absl@@QAE_NH@Z
+    ?ShouldLog@LogEveryPow2State@log_internal@absl@@QAE_NXZ
+    ?ShouldLog@LogFirstNState@log_internal@absl@@QAE_NH@Z
+    ?ShouldLogBacktraceAt@log_internal@absl@@YA_NVstring_view@2@H@Z
+    ?ShouldPrependLogPrefix@absl@@YA_NXZ
+    ?ShouldSymbolizeLogStackTrace@log_internal@absl@@YA_NXZ
+    ?Signal@CondVar@absl@@QAEXXZ
+    ?SignalAll@CondVar@absl@@QAEXXZ
+    ?SimpleAtob@absl@@YA_NVstring_view@1@PA_N@Z
+    ?SimpleAtod@absl@@YA_NVstring_view@1@PAN@Z
+    ?SimpleAtof@absl@@YA_NVstring_view@1@PAM@Z
+    ?SixDigitsToBuffer@numbers_internal@absl@@YAINPAD@Z
+    ?SizeofCordRepExternal@CordTestAccess@strings_internal@absl@@SAIXZ
+    ?SizeofCordRepSubstring@CordTestAccess@strings_internal@absl@@SAIXZ
+    ?Skip@CordRepBtreeNavigator@cord_internal@absl@@QAE?AUPosition@123@I@Z
+    ?SlowLock@SpinLock@base_internal@absl@@AAEXXZ
+    ?SlowUnlock@SpinLock@base_internal@absl@@AAEXI@Z
+    ?SnprintF@str_format_internal@absl@@YAHPADIVUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SpinLockSuggestedDelayNS@base_internal@absl@@YAHH@Z
+    ?SpinLockWait@base_internal@absl@@YAIPAU?$atomic@I@Cr@std@@HQBUSpinLockWaitTransition@12@W4SchedulingMode@12@@Z
+    ?SpinLoop@SpinLock@base_internal@absl@@AAEIXZ
+    ?StackTraceWorksForTest@debugging_internal@absl@@YA_NXZ
+    ?StartsWithIgnoreCase@absl@@YA_NVstring_view@1@0@Z
+    ?StatusCodeToString@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusCode@1@@Z
+    ?StderrThreshold@absl@@YA?AW4LogSeverityAtLeast@1@XZ
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@111@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@11@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@1@Z
+    ?StrAppend@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@000@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@00@Z
+    ?StrCat@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@ABVAlphaNum@1@0@Z
+    ?StrError@base_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@H@Z
+    ?StrReplaceAll@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@1@V?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@4@@Z
+    ?StrReplaceAll@absl@@YAHV?$initializer_list@U?$pair@Vstring_view@absl@@V12@@Cr@std@@@std@@PAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@3@@Z
+    ?SubLength@CordRepRing@cord_internal@absl@@AAEXII@Z
+    ?SubRing@CordRepRing@cord_internal@absl@@SAPAV123@PAV123@III@Z
+    ?SubTree@CordRepBtree@cord_internal@absl@@QAEPAUCordRep@23@II@Z
+    ?Subcord@Cord@absl@@QBE?AV12@II@Z
+    ?SubstituteAndAppendArray@substitute_internal@absl@@YAXPAV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@Vstring_view@2@PBV62@I@Z
+    ?Summarize@str_format_internal@absl@@YA?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@VUntypedFormatSpecImpl@12@V?$Span@$$CBVFormatArgImpl@str_format_internal@absl@@@2@@Z
+    ?SuppressSigabortTrace@log_internal@absl@@YA_NXZ
+    ?Symbolize@absl@@YA_NPBXPADH@Z
+    ?ThreadIsLoggingToLogSink@log_internal@absl@@YA_NXZ
+    ?ThrowBadStatusOrAccess@internal_statusor@absl@@YAXVStatus@2@@Z
+    ?ThrowBadVariantAccess@variant_internal@absl@@YAXXZ
+    ?ThrowSeedGenException@random_internal@absl@@YAXXZ
+    ?ThrowStdBadAlloc@base_internal@absl@@YAXXZ
+    ?ThrowStdBadFunctionCall@base_internal@absl@@YAXXZ
+    ?ThrowStdDomainError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdDomainError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdInvalidArgument@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLengthError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdLogicError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOutOfRange@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdOverflowError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRangeError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdRuntimeError@base_internal@absl@@YAXPBD@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXABV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@@Z
+    ?ThrowStdUnderflowError@base_internal@absl@@YAXPBD@Z
+    ?Tick@PerThreadSem@synchronization_internal@absl@@SAXPAUThreadIdentity@base_internal@3@@Z
+    ?TimeFromTimespec@absl@@YA?AVTime@1@Utimespec@@@Z
+    ?TimeFromTimeval@absl@@YA?AVTime@1@Utimeval@@@Z
+    ?TimeLocal@TimeZoneInfo@cctz@time_internal@absl@@ABE?AUcivil_lookup@time_zone@234@ABV?$civil_time@Usecond_tag@detail@cctz@time_internal@absl@@@detail@234@_J@Z
+    ?TimeZone@log_internal@absl@@YAPBV02@XZ
+    ?ToChronoHours@absl@@YA?AV?$duration@JV?$ratio@$0OBA@$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoMicroseconds@absl@@YA?AV?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoMilliseconds@absl@@YA?AV?$duration@_JV?$ratio@$00$0DOI@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoMinutes@absl@@YA?AV?$duration@JV?$ratio@$0DM@$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoNanoseconds@absl@@YA?AV?$duration@_JV?$ratio@$00$0DLJKMKAA@@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoSeconds@absl@@YA?AV?$duration@_JV?$ratio@$00$00@Cr@std@@@chrono@Cr@std@@VDuration@1@@Z
+    ?ToChronoTime@absl@@YA?AV?$time_point@Vsystem_clock@chrono@Cr@std@@V?$duration@_JV?$ratio@$00$0PECEA@@Cr@std@@@234@@chrono@Cr@std@@VTime@1@@Z
+    ?ToDoubleHours@absl@@YANVDuration@1@@Z
+    ?ToDoubleMicroseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleMilliseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleMinutes@absl@@YANVDuration@1@@Z
+    ?ToDoubleNanoseconds@absl@@YANVDuration@1@@Z
+    ?ToDoubleSeconds@absl@@YANVDuration@1@@Z
+    ?ToInt64Hours@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Microseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Milliseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Minutes@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Nanoseconds@absl@@YA_JVDuration@1@@Z
+    ?ToInt64Seconds@absl@@YA_JVDuration@1@@Z
+    ?ToSinkAlso@LogMessage@log_internal@absl@@QAEAAV123@PAVLogSink@3@@Z
+    ?ToSinkOnly@LogMessage@log_internal@absl@@QAEAAV123@PAVLogSink@3@@Z
+    ?ToString@?$BigUnsigned@$03@strings_internal@absl@@QBE?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?ToString@?$BigUnsigned@$0FE@@strings_internal@absl@@QBE?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@XZ
+    ?ToString@Status@absl@@QBE?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusToStringMode@2@@Z
+    ?ToStringSlow@Status@absl@@ABE?AV?$basic_string@DU?$char_traits@D@Cr@std@@V?$allocator@D@23@@Cr@std@@W4StatusToStringMode@2@@Z
+    ?ToTM@absl@@YA?AUtm@@VTime@1@VTimeZone@1@@Z
+    ?ToTimeT@absl@@YA_JVTime@1@@Z
+    ?ToTimespec@absl@@YA?AUtimespec@@VDuration@1@@Z
+    ?ToTimespec@absl@@YA?AUtimespec@@VTime@1@@Z
+    ?ToTimeval@absl@@YA?AUtimeval@@VDuration@1@@Z
+    ?ToTimeval@absl@@YA?AUtimeval@@VTime@1@@Z
+    ?ToUDate@absl@@YANVTime@1@@Z
+    ?ToUniversal@absl@@YA_JVTime@1@@Z
+    ?ToUnixMicros@absl@@YA_JVTime@1@@Z
+    ?ToUnixMillis@absl@@YA_JVTime@1@@Z
+    ?ToUnixNanos@absl@@YA_JVTime@1@@Z
+    ?ToUnixSeconds@absl@@YA_JVTime@1@@Z
+    ?Track@CordzInfo@cord_internal@absl@@AAEXXZ
+    ?TrackCord@CordzInfo@cord_internal@absl@@SAXAAVInlineData@23@ABV423@W4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?TrackCord@CordzInfo@cord_internal@absl@@SAXAAVInlineData@23@W4MethodIdentifier@CordzUpdateTracker@23@@Z
+    ?Trans@Mutex@absl@@AAEXPBUMuHowS@2@@Z
+    ?Trunc@absl@@YA?AVDuration@1@V21@0@Z
+    ?TryLock@Mutex@absl@@QAE_NXZ
+    ?TryRemove@Mutex@absl@@AAEXPAUPerThreadSynch@base_internal@2@@Z
+    ?UTC@Impl@time_zone@cctz@time_internal@absl@@SA?AV2345@XZ
+    ?UTCImpl@Impl@time_zone@cctz@time_internal@absl@@CAPBV12345@XZ
+    ?UnauthenticatedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?UnavailableError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?UnimplementedError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?UnknownError@absl@@YA?AVStatus@1@Vstring_view@1@@Z
+    ?Unlock@CordzInfo@cord_internal@absl@@QAEXXZ
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