Remove libbacktrace. am: f60075f709 am: 2374a82679 am: 2e5782145c

Original change: https://android-review.googlesource.com/c/platform/system/unwinding/+/2449889

Change-Id: I22b3c1b44946c84fa81796ea4bee6f397d9fac57
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

47 files changed, 0 insertions, 5185 deletions

diff --git a/libbacktrace/.clang-format b/libbacktrace/.clang-format
deleted file mode 120000
index 5f196c3..0000000
--- a/libbacktrace/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../../../build/soong/scripts/system-clang-format-2
\ No newline at end of file
diff --git a/libbacktrace/Backtrace.cpp b/libbacktrace/Backtrace.cpp
deleted file mode 100644
index 3e050ab..0000000
--- a/libbacktrace/Backtrace.cpp
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <inttypes.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <ucontext.h>
-
-#include <string>
-
-#include <android-base/stringprintf.h>
-#include <android-base/threads.h>
-
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-
-#include "BacktraceLog.h"
-#include "UnwindStack.h"
-
-using android::base::StringPrintf;
-
-extern "C" char* __cxa_demangle(const char*, char*, size_t*, int*);
-
-//-------------------------------------------------------------------------
-// Backtrace functions.
-//-------------------------------------------------------------------------
-Backtrace::Backtrace(pid_t pid, pid_t tid, BacktraceMap* map)
-    : pid_(pid), tid_(tid), map_(map), map_shared_(true) {
-  if (map_ == nullptr) {
-    map_ = BacktraceMap::Create(pid);
-    map_shared_ = false;
-  }
-}
-
-Backtrace::~Backtrace() {
-  if (map_ && !map_shared_) {
-    delete map_;
-    map_ = nullptr;
-  }
-}
-
-std::string Backtrace::GetFunctionName(uint64_t pc, uint64_t* offset, const backtrace_map_t* map) {
-  backtrace_map_t map_value;
-  if (map == nullptr) {
-    FillInMap(pc, &map_value);
-    map = &map_value;
-  }
-  // If no map is found, or this map is backed by a device, then return nothing.
-  if (map->start == 0 || (map->flags & PROT_DEVICE_MAP)) {
-    return "";
-  }
-  std::string name(GetFunctionNameRaw(pc, offset));
-  char* demangled_name = __cxa_demangle(name.c_str(), nullptr, nullptr, nullptr);
-  if (demangled_name != nullptr) {
-    name = demangled_name;
-    free(demangled_name);
-    return name;
-  }
-  return name;
-}
-
-bool Backtrace::VerifyReadWordArgs(uint64_t ptr, word_t* out_value) {
-  if (ptr & (sizeof(word_t)-1)) {
-    BACK_LOGW("invalid pointer %p", reinterpret_cast<void*>(ptr));
-    *out_value = static_cast<word_t>(-1);
-    return false;
-  }
-  return true;
-}
-
-std::string Backtrace::FormatFrameData(size_t frame_num) {
-  if (frame_num >= frames_.size()) {
-    return "";
-  }
-  return FormatFrameData(&frames_[frame_num]);
-}
-
-std::string Backtrace::FormatFrameData(const backtrace_frame_data_t* frame) {
-  std::string map_name;
-  if (BacktraceMap::IsValid(frame->map)) {
-    map_name = frame->map.Name();
-    if (!frame->map.name.empty()) {
-      if (map_name[0] == '[' && map_name[map_name.size() - 1] == ']') {
-        map_name.resize(map_name.size() - 1);
-        map_name += StringPrintf(":%" PRIPTR "]", frame->map.start);
-      }
-    }
-  } else {
-    map_name = "<unknown>";
-  }
-
-  std::string line(StringPrintf("#%02zu pc %" PRIPTR "  ", frame->num, frame->rel_pc));
-  line += map_name;
-  // Special handling for non-zero offset maps, we need to print that
-  // information.
-  if (frame->map.offset != 0) {
-    line += " (offset " + StringPrintf("0x%" PRIx64, frame->map.offset) + ")";
-  }
-  if (!frame->func_name.empty()) {
-    line += " (" + frame->func_name;
-    if (frame->func_offset) {
-      line += StringPrintf("+%" PRIu64, frame->func_offset);
-    }
-    line += ')';
-  }
-
-  return line;
-}
-
-void Backtrace::FillInMap(uint64_t pc, backtrace_map_t* map) {
-  if (map_ != nullptr) {
-    map_->FillIn(pc, map);
-  }
-}
-
-Backtrace* Backtrace::Create(pid_t pid, pid_t tid, BacktraceMap* map) {
-  if (pid == BACKTRACE_CURRENT_PROCESS) {
-    pid = getpid();
-    if (tid == BACKTRACE_CURRENT_THREAD) {
-      tid = android::base::GetThreadId();
-    }
-  } else if (tid == BACKTRACE_CURRENT_THREAD) {
-    tid = pid;
-  }
-
-  if (pid == getpid()) {
-    return new UnwindStackCurrent(pid, tid, map);
-  } else {
-    return new UnwindStackPtrace(pid, tid, map);
-  }
-}
-
-std::string Backtrace::GetErrorString(BacktraceUnwindError error) {
-  switch (error.error_code) {
-    case BACKTRACE_UNWIND_NO_ERROR:
-      return "No error";
-    case BACKTRACE_UNWIND_ERROR_SETUP_FAILED:
-      return "Setup failed";
-    case BACKTRACE_UNWIND_ERROR_MAP_MISSING:
-      return "No map found";
-    case BACKTRACE_UNWIND_ERROR_INTERNAL:
-      return "Internal libbacktrace error, please submit a bugreport";
-    case BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST:
-      return "Thread doesn't exist";
-    case BACKTRACE_UNWIND_ERROR_THREAD_TIMEOUT:
-      return "Thread has not responded to signal in time";
-    case BACKTRACE_UNWIND_ERROR_UNSUPPORTED_OPERATION:
-      return "Attempt to use an unsupported feature";
-    case BACKTRACE_UNWIND_ERROR_NO_CONTEXT:
-      return "Attempt to do an offline unwind without a context";
-    case BACKTRACE_UNWIND_ERROR_EXCEED_MAX_FRAMES_LIMIT:
-      return "Exceed MAX_BACKTRACE_FRAMES limit";
-    case BACKTRACE_UNWIND_ERROR_ACCESS_MEM_FAILED:
-      return android::base::StringPrintf("Failed to read memory at addr 0x%" PRIx64,
-                                         error.error_info.addr);
-    case BACKTRACE_UNWIND_ERROR_ACCESS_REG_FAILED:
-      return android::base::StringPrintf("Failed to read register %" PRIu64, error.error_info.regno);
-    case BACKTRACE_UNWIND_ERROR_FIND_PROC_INFO_FAILED:
-      return "Failed to find a function in debug sections";
-    case BACKTRACE_UNWIND_ERROR_EXECUTE_DWARF_INSTRUCTION_FAILED:
-      return "Failed to execute dwarf instructions in debug sections";
-    case BACKTRACE_UNWIND_ERROR_UNWIND_INFO:
-      return "Failed to unwind due to invalid unwind information";
-    case BACKTRACE_UNWIND_ERROR_REPEATED_FRAME:
-      return "Failed to unwind due to same sp/pc repeating";
-    case BACKTRACE_UNWIND_ERROR_INVALID_ELF:
-      return "Failed to unwind due to invalid elf";
-  }
-}
diff --git a/libbacktrace/BacktraceAsyncSafeLog.h b/libbacktrace/BacktraceAsyncSafeLog.h
deleted file mode 100644
index 14f51be..0000000
--- a/libbacktrace/BacktraceAsyncSafeLog.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_BACKTRACE_ASYNC_SAFE_LOG_H
-#define _LIBBACKTRACE_BACKTRACE_ASYNC_SAFE_LOG_H
-
-#if defined(__ANDROID__)
-
-#include <async_safe/log.h>
-
-// Logging macros for use in signal handler, only available on target.
-#define BACK_ASYNC_SAFE_LOGW(format, ...)                                                     \
-  async_safe_format_log(ANDROID_LOG_WARN, "libbacktrace", "%s: " format, __PRETTY_FUNCTION__, \
-                        ##__VA_ARGS__)
-
-#define BACK_ASYNC_SAFE_LOGE(format, ...)                                                      \
-  async_safe_format_log(ANDROID_LOG_ERROR, "libbacktrace", "%s: " format, __PRETTY_FUNCTION__, \
-                        ##__VA_ARGS__)
-
-#else
-
-#define BACK_ASYNC_SAFE_LOGW(format, ...)
-
-#define BACK_ASYNC_SAFE_LOGE(format, ...)
-
-#endif
-
-#endif  // _LIBBACKTRACE_BACKTRACE_ASYNC_SAFE_LOG_H
diff --git a/libbacktrace/BacktraceCurrent.cpp b/libbacktrace/BacktraceCurrent.cpp
deleted file mode 100644
index 84c7bc8..0000000
--- a/libbacktrace/BacktraceCurrent.cpp
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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.
- */
-
-#define _GNU_SOURCE 1
-#include <errno.h>
-#include <stdint.h>
-#include <string.h>
-#include <sys/param.h>
-#include <sys/ptrace.h>
-#include <sys/types.h>
-#include <ucontext.h>
-#include <unistd.h>
-
-#include <stdlib.h>
-
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/threads.h>
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-
-#include "BacktraceAsyncSafeLog.h"
-#include "BacktraceCurrent.h"
-#include "ThreadEntry.h"
-
-bool BacktraceCurrent::ReadWord(uint64_t ptr, word_t* out_value) {
-#if defined(__aarch64__)
-  // Tagged pointer after Android R would lead top byte to have random values
-  // https://source.android.com/devices/tech/debug/tagged-pointers
-  ptr &= (1ULL << 56) - 1;
-#endif
-
-  if (!VerifyReadWordArgs(ptr, out_value)) {
-    return false;
-  }
-
-  backtrace_map_t map;
-  FillInMap(ptr, &map);
-  if (BacktraceMap::IsValid(map) && map.flags & PROT_READ) {
-    *out_value = *reinterpret_cast<word_t*>(ptr);
-    return true;
-  } else {
-    BACK_ASYNC_SAFE_LOGW("pointer %p not in a readable map", reinterpret_cast<void*>(ptr));
-    *out_value = static_cast<word_t>(-1);
-    return false;
-  }
-}
-
-size_t BacktraceCurrent::Read(uint64_t addr, uint8_t* buffer, size_t bytes) {
-#if defined(__aarch64__)
-  // Tagged pointer after Android R would lead top byte to have random values
-  // https://source.android.com/devices/tech/debug/tagged-pointers
-  addr &= (1ULL << 56) - 1;
-#endif
-
-  backtrace_map_t map;
-  FillInMap(addr, &map);
-  if (!BacktraceMap::IsValid(map) || !(map.flags & PROT_READ)) {
-    return 0;
-  }
-  bytes = MIN(map.end - addr, bytes);
-  memcpy(buffer, reinterpret_cast<uint8_t*>(addr), bytes);
-  return bytes;
-}
-
-bool BacktraceCurrent::Unwind(size_t num_ignore_frames, void* ucontext) {
-  if (GetMap() == nullptr) {
-    // Without a map object, we can't do anything.
-    error_.error_code = BACKTRACE_UNWIND_ERROR_MAP_MISSING;
-    return false;
-  }
-
-  error_.error_code = BACKTRACE_UNWIND_NO_ERROR;
-  if (ucontext) {
-    return UnwindFromContext(num_ignore_frames, ucontext);
-  }
-
-  if (Tid() != static_cast<pid_t>(android::base::GetThreadId())) {
-    return UnwindThread(num_ignore_frames);
-  }
-
-  return UnwindFromContext(num_ignore_frames, nullptr);
-}
-
-bool BacktraceCurrent::DiscardFrame(const backtrace_frame_data_t& frame) {
-  if (BacktraceMap::IsValid(frame.map)) {
-    const std::string library = android::base::Basename(frame.map.name);
-    if (library == "libunwind.so" || library == "libbacktrace.so") {
-      return true;
-    }
-  }
-  return false;
-}
-
-static pthread_mutex_t g_sigaction_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-// Since errno is stored per thread, changing it in the signal handler
-// modifies the value on the thread in which the signal handler executes.
-// If a signal occurs between a call and an errno check, it's possible
-// to get the errno set here. Always save and restore it just in case
-// code would modify it.
-class ErrnoRestorer {
- public:
-  ErrnoRestorer() : saved_errno_(errno) {}
-  ~ErrnoRestorer() {
-    errno = saved_errno_;
-  }
-
- private:
-  int saved_errno_;
-};
-
-static void SignalLogOnly(int, siginfo_t*, void*) {
-  ErrnoRestorer restore;
-
-  BACK_ASYNC_SAFE_LOGE("pid %d, tid %d: Received a spurious signal %d\n", getpid(),
-                       static_cast<int>(android::base::GetThreadId()), THREAD_SIGNAL);
-}
-
-static void SignalHandler(int, siginfo_t*, void* sigcontext) {
-  ErrnoRestorer restore;
-
-  ThreadEntry* entry = ThreadEntry::Get(getpid(), android::base::GetThreadId(), false);
-  if (!entry) {
-    BACK_ASYNC_SAFE_LOGE("pid %d, tid %d entry not found", getpid(),
-                         static_cast<int>(android::base::GetThreadId()));
-    return;
-  }
-
-  entry->CopyUcontextFromSigcontext(sigcontext);
-
-  // Indicate the ucontext is now valid.
-  entry->Wake();
-
-  // Pause the thread until the unwind is complete. This avoids having
-  // the thread run ahead causing problems.
-  // The number indicates that we are waiting for the second Wake() call
-  // overall which is made by the thread requesting an unwind.
-  if (entry->Wait(2)) {
-    // Do not remove the entry here because that can result in a deadlock
-    // if the code cannot properly send a signal to the thread under test.
-    entry->Wake();
-  } else {
-    // At this point, it is possible that entry has been freed, so just exit.
-    BACK_ASYNC_SAFE_LOGE("Timed out waiting for unwind thread to indicate it completed.");
-  }
-}
-
-bool BacktraceCurrent::UnwindThread(size_t num_ignore_frames) {
-  // Prevent multiple threads trying to set the trigger action on different
-  // threads at the same time.
-  pthread_mutex_lock(&g_sigaction_mutex);
-
-  ThreadEntry* entry = ThreadEntry::Get(Pid(), Tid());
-  entry->Lock();
-
-  struct sigaction act, oldact;
-  memset(&act, 0, sizeof(act));
-  act.sa_sigaction = SignalHandler;
-  act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
-  sigemptyset(&act.sa_mask);
-  if (sigaction(THREAD_SIGNAL, &act, &oldact) != 0) {
-    BACK_ASYNC_SAFE_LOGE("sigaction failed: %s", strerror(errno));
-    ThreadEntry::Remove(entry);
-    pthread_mutex_unlock(&g_sigaction_mutex);
-    error_.error_code = BACKTRACE_UNWIND_ERROR_INTERNAL;
-    return false;
-  }
-
-  if (tgkill(Pid(), Tid(), THREAD_SIGNAL) != 0) {
-    // Do not emit an error message, this might be expected. Set the
-    // error and let the caller decide.
-    if (errno == ESRCH) {
-      error_.error_code = BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST;
-    } else {
-      error_.error_code = BACKTRACE_UNWIND_ERROR_INTERNAL;
-    }
-
-    sigaction(THREAD_SIGNAL, &oldact, nullptr);
-    ThreadEntry::Remove(entry);
-    pthread_mutex_unlock(&g_sigaction_mutex);
-    return false;
-  }
-
-  // Wait for the thread to get the ucontext. The number indicates
-  // that we are waiting for the first Wake() call made by the thread.
-  bool wait_completed = entry->Wait(1);
-
-  if (!wait_completed && oldact.sa_sigaction == nullptr) {
-    // If the wait failed, it could be that the signal could not be delivered
-    // within the timeout. Add a signal handler that's simply going to log
-    // something so that we don't crash if the signal eventually gets
-    // delivered. Only do this if there isn't already an action set up.
-    memset(&act, 0, sizeof(act));
-    act.sa_sigaction = SignalLogOnly;
-    act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
-    sigemptyset(&act.sa_mask);
-    sigaction(THREAD_SIGNAL, &act, nullptr);
-  } else {
-    sigaction(THREAD_SIGNAL, &oldact, nullptr);
-  }
-  // After the thread has received the signal, allow other unwinders to
-  // continue.
-  pthread_mutex_unlock(&g_sigaction_mutex);
-
-  bool unwind_done = false;
-  if (wait_completed) {
-    unwind_done = UnwindFromContext(num_ignore_frames, entry->GetUcontext());
-
-    // Tell the signal handler to exit and release the entry.
-    entry->Wake();
-
-    // Wait for the thread to indicate it is done with the ThreadEntry.
-    if (!entry->Wait(3)) {
-      // Send a warning, but do not mark as a failure to unwind.
-      BACK_ASYNC_SAFE_LOGW("Timed out waiting for signal handler to indicate it finished.");
-    }
-  } else {
-    // Check to see if the thread has disappeared.
-    if (tgkill(Pid(), Tid(), 0) == -1 && errno == ESRCH) {
-      error_.error_code = BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST;
-    } else {
-      error_.error_code = BACKTRACE_UNWIND_ERROR_THREAD_TIMEOUT;
-      BACK_ASYNC_SAFE_LOGE("Timed out waiting for signal handler to get ucontext data.");
-    }
-  }
-
-  ThreadEntry::Remove(entry);
-
-  return unwind_done;
-}
diff --git a/libbacktrace/BacktraceCurrent.h b/libbacktrace/BacktraceCurrent.h
deleted file mode 100644
index 55afea3..0000000
--- a/libbacktrace/BacktraceCurrent.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_BACKTRACE_CURRENT_H
-#define _LIBBACKTRACE_BACKTRACE_CURRENT_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <backtrace/Backtrace.h>
-
-// The signal used to cause a thread to dump the stack.
-#if !defined(__BIONIC__)
-// In order to run the backtrace_tests on the host, we can't use
-// the internal real time signals used by GLIBC. To avoid this,
-// use SIGRTMIN for the signal to dump the stack.
-#define THREAD_SIGNAL SIGRTMIN
-#else
-#define THREAD_SIGNAL (__SIGRTMIN+1)
-#endif
-
-class BacktraceMap;
-
-class BacktraceCurrent : public Backtrace {
- public:
-  BacktraceCurrent(pid_t pid, pid_t tid, BacktraceMap* map) : Backtrace(pid, tid, map) {}
-  virtual ~BacktraceCurrent() {}
-
-  size_t Read(uint64_t addr, uint8_t* buffer, size_t bytes) override;
-
-  bool ReadWord(uint64_t ptr, word_t* out_value) override;
-
-  bool Unwind(size_t num_ignore_frames, void* ucontext) override;
-
- protected:
-  bool DiscardFrame(const backtrace_frame_data_t& frame);
-
- private:
-  bool UnwindThread(size_t num_ignore_frames);
-
-  virtual bool UnwindFromContext(size_t num_ignore_frames, void* ucontext) = 0;
-};
-
-#endif // _LIBBACKTRACE_BACKTRACE_CURRENT_H
diff --git a/libbacktrace/BacktraceLog.h b/libbacktrace/BacktraceLog.h
deleted file mode 100644
index 5c39f1c..0000000
--- a/libbacktrace/BacktraceLog.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_BACKTRACE_LOG_H
-#define _LIBBACKTRACE_BACKTRACE_LOG_H
-
-#define LOG_TAG "libbacktrace"
-
-#include <log/log.h>
-
-// Macro to log the function name along with the warning message.
-#define BACK_LOGW(format, ...) \
-  ALOGW("%s: " format, __PRETTY_FUNCTION__, ##__VA_ARGS__)
-
-#define BACK_LOGE(format, ...) \
-  ALOGE("%s: " format, __PRETTY_FUNCTION__, ##__VA_ARGS__)
-
-#endif // _LIBBACKTRACE_BACKTRACE_LOG_H
diff --git a/libbacktrace/BacktraceMap.cpp b/libbacktrace/BacktraceMap.cpp
deleted file mode 100644
index cd46ce0..0000000
--- a/libbacktrace/BacktraceMap.cpp
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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.
- */
-
-#define LOG_TAG "backtrace-map"
-
-#include <ctype.h>
-#include <inttypes.h>
-#include <stdint.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <log/log.h>
-
-#include <android-base/stringprintf.h>
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-#include <backtrace/backtrace_constants.h>
-#if defined(__linux__)
-#include <procinfo/process_map.h>
-#endif
-
-using android::base::StringPrintf;
-
-std::string backtrace_map_t::Name() const {
-  if (!name.empty()) return name;
-  if (start == 0 && end == 0) return "";
-  return StringPrintf("<anonymous:%" PRIPTR ">", start);
-}
-
-BacktraceMap::BacktraceMap(pid_t pid) : pid_(pid) {
-  if (pid_ < 0) {
-    pid_ = getpid();
-  }
-}
-
-BacktraceMap::~BacktraceMap() {}
-
-void BacktraceMap::FillIn(uint64_t addr, backtrace_map_t* map) {
-  ScopedBacktraceMapIteratorLock lock(this);
-  for (auto it = begin(); it != end(); ++it) {
-    const backtrace_map_t* entry = *it;
-    if (addr >= entry->start && addr < entry->end) {
-      *map = *entry;
-      return;
-    }
-  }
-  *map = {};
-}
-
-#if defined(__APPLE__)
-static bool ParseLine(const char* line, backtrace_map_t* map) {
-  uint64_t start;
-  uint64_t end;
-  char permissions[5];
-  int name_pos;
-
-  // Mac OS vmmap(1) output:
-  // __TEXT                 0009f000-000a1000 [    8K     8K] r-x/rwx SM=COW
-  // /Volumes/android/dalvik-dev/out/host/darwin-x86/bin/libcorkscrew_test\n
-  // 012345678901234567890123456789012345678901234567890123456789
-  // 0         1         2         3         4         5
-  if (sscanf(line, "%*21c %" SCNx64 "-%" SCNx64 " [%*13c] %3c/%*3c SM=%*3c  %n", &start, &end,
-             permissions, &name_pos) != 3) {
-    return false;
-  }
-
-  map->start = start;
-  map->end = end;
-  map->flags = PROT_NONE;
-  if (permissions[0] == 'r') {
-    map->flags |= PROT_READ;
-  }
-  if (permissions[1] == 'w') {
-    map->flags |= PROT_WRITE;
-  }
-  if (permissions[2] == 'x') {
-    map->flags |= PROT_EXEC;
-  }
-
-  map->name = line + name_pos;
-  if (!map->name.empty() && map->name[map->name.length() - 1] == '\n') {
-    map->name.erase(map->name.length() - 1);
-  }
-
-  ALOGV("Parsed map: start=%p, end=%p, flags=%x, name=%s", reinterpret_cast<void*>(map->start),
-        reinterpret_cast<void*>(map->end), map->flags, map->name.c_str());
-  return true;
-}
-#endif  // defined(__APPLE__)
-
-bool BacktraceMap::Build() {
-#if defined(__APPLE__)
-  char
-      cmd[sizeof(pid_t) * 3 + sizeof("vmmap -w -resident -submap -allSplitLibs -interleaved ") + 1];
-  char line[1024];
-  // cmd is guaranteed to always be big enough to hold this string.
-  snprintf(cmd, sizeof(cmd), "vmmap -w -resident -submap -allSplitLibs -interleaved %d", pid_);
-  FILE* fp = popen(cmd, "r");
-  if (fp == nullptr) {
-    return false;
-  }
-
-  while (fgets(line, sizeof(line), fp)) {
-    backtrace_map_t map;
-    if (ParseLine(line, &map)) {
-      maps_.push_back(map);
-    }
-  }
-  pclose(fp);
-  return true;
-#else
-  return android::procinfo::ReadProcessMaps(pid_,
-                  [&](const android::procinfo::MapInfo& mapinfo) {
-    maps_.resize(maps_.size() + 1);
-    backtrace_map_t& map = maps_.back();
-    map.start = mapinfo.start;
-    map.end = mapinfo.end;
-    map.flags = mapinfo.flags;
-    map.name = mapinfo.name;
-  });
-#endif
-}
-
-#if defined(__APPLE__)
-// Corkscrew and libunwind don't compile on the mac, so create a generic
-// map object.
-BacktraceMap* BacktraceMap::Create(pid_t pid, bool /*uncached*/) {
-  BacktraceMap* map = new BacktraceMap(pid);
-  if (!map->Build()) {
-    delete map;
-    return nullptr;
-  }
-  return map;
-}
-#endif
diff --git a/libbacktrace/BacktracePtrace.cpp b/libbacktrace/BacktracePtrace.cpp
deleted file mode 100644
index 9da457d..0000000
--- a/libbacktrace/BacktracePtrace.cpp
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <stdint.h>
-#include <string.h>
-#include <sys/param.h>
-#include <sys/ptrace.h>
-#include <sys/types.h>
-#include <ucontext.h>
-#include <unistd.h>
-
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-
-#include "BacktraceLog.h"
-#include "BacktracePtrace.h"
-
-#if !defined(__APPLE__)
-static bool PtraceRead(pid_t tid, uint64_t addr, word_t* out_value) {
-  // ptrace() returns -1 and sets errno when the operation fails.
-  // To disambiguate -1 from a valid result, we clear errno beforehand.
-  errno = 0;
-  *out_value = ptrace(PTRACE_PEEKTEXT, tid, reinterpret_cast<void*>(addr), nullptr);
-  if (*out_value == static_cast<word_t>(-1) && errno) {
-    return false;
-  }
-  return true;
-}
-#endif
-
-bool BacktracePtrace::ReadWord(uint64_t ptr, word_t* out_value) {
-#if defined(__APPLE__)
-  BACK_LOGW("MacOS does not support reading from another pid.");
-  return false;
-#else
-  if (!VerifyReadWordArgs(ptr, out_value)) {
-    return false;
-  }
-
-  backtrace_map_t map;
-  FillInMap(ptr, &map);
-  if (!BacktraceMap::IsValid(map) || !(map.flags & PROT_READ)) {
-    return false;
-  }
-
-  return PtraceRead(Tid(), ptr, out_value);
-#endif
-}
-
-size_t BacktracePtrace::Read(uint64_t addr, uint8_t* buffer, size_t bytes) {
-#if defined(__APPLE__)
-  BACK_LOGW("MacOS does not support reading from another pid.");
-  return 0;
-#else
-  backtrace_map_t map;
-  FillInMap(addr, &map);
-  if (!BacktraceMap::IsValid(map) || !(map.flags & PROT_READ)) {
-    return 0;
-  }
-
-  bytes = MIN(map.end - addr, bytes);
-  size_t bytes_read = 0;
-  word_t data_word;
-  size_t align_bytes = addr & (sizeof(word_t) - 1);
-  if (align_bytes != 0) {
-    if (!PtraceRead(Tid(), addr & ~(sizeof(word_t) - 1), &data_word)) {
-      return 0;
-    }
-    size_t copy_bytes = MIN(sizeof(word_t) - align_bytes, bytes);
-    memcpy(buffer, reinterpret_cast<uint8_t*>(&data_word) + align_bytes, copy_bytes);
-    addr += copy_bytes;
-    buffer += copy_bytes;
-    bytes -= copy_bytes;
-    bytes_read += copy_bytes;
-  }
-
-  size_t num_words = bytes / sizeof(word_t);
-  for (size_t i = 0; i < num_words; i++) {
-    if (!PtraceRead(Tid(), addr, &data_word)) {
-      return bytes_read;
-    }
-    memcpy(buffer, &data_word, sizeof(word_t));
-    buffer += sizeof(word_t);
-    addr += sizeof(word_t);
-    bytes_read += sizeof(word_t);
-  }
-
-  size_t left_over = bytes & (sizeof(word_t) - 1);
-  if (left_over) {
-    if (!PtraceRead(Tid(), addr, &data_word)) {
-      return bytes_read;
-    }
-    memcpy(buffer, &data_word, left_over);
-    bytes_read += left_over;
-  }
-  return bytes_read;
-#endif
-}
diff --git a/libbacktrace/BacktracePtrace.h b/libbacktrace/BacktracePtrace.h
deleted file mode 100644
index 1ae3adf..0000000
--- a/libbacktrace/BacktracePtrace.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_BACKTRACE_PTRACE_H
-#define _LIBBACKTRACE_BACKTRACE_PTRACE_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <backtrace/Backtrace.h>
-
-class BacktraceMap;
-
-class BacktracePtrace : public Backtrace {
- public:
-  BacktracePtrace(pid_t pid, pid_t tid, BacktraceMap* map) : Backtrace(pid, tid, map) {}
-  virtual ~BacktracePtrace() {}
-
-  size_t Read(uint64_t addr, uint8_t* buffer, size_t bytes) override;
-
-  bool ReadWord(uint64_t ptr, word_t* out_value) override;
-};
-
-#endif // _LIBBACKTRACE_BACKTRACE_PTRACE_H
diff --git a/libbacktrace/BacktraceTest.h b/libbacktrace/BacktraceTest.h
deleted file mode 100644
index c38af04..0000000
--- a/libbacktrace/BacktraceTest.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_BACKTRACE_TEST_H
-#define _LIBBACKTRACE_BACKTRACE_TEST_H
-
-#include <dlfcn.h>
-
-#include <gtest/gtest.h>
-
-class BacktraceTest : public ::testing::Test {
- protected:
-  static void SetUpTestCase() {
-    dl_handle_ = dlopen("libbacktrace_test.so", RTLD_NOW | RTLD_LOCAL);
-
-    test_level_one_ = reinterpret_cast<int (*)(int, int, int, int, void (*)(void*), void*)>(
-        dlsym(dl_handle_, "test_level_one"));
-
-    test_level_two_ = reinterpret_cast<int (*)(int, int, int, int, void (*)(void*), void*)>(
-        dlsym(dl_handle_, "test_level_two"));
-
-    test_level_three_ = reinterpret_cast<int (*)(int, int, int, int, void (*)(void*), void*)>(
-        dlsym(dl_handle_, "test_level_three"));
-
-    test_level_four_ = reinterpret_cast<int (*)(int, int, int, int, void (*)(void*), void*)>(
-        dlsym(dl_handle_, "test_level_four"));
-
-    test_recursive_call_ = reinterpret_cast<int (*)(int, void (*)(void*), void*)>(
-        dlsym(dl_handle_, "test_recursive_call"));
-
-    test_get_context_and_wait_ = reinterpret_cast<void (*)(void*, volatile int*)>(
-        dlsym(dl_handle_, "test_get_context_and_wait"));
-
-    test_signal_action_ =
-        reinterpret_cast<void (*)(int, siginfo_t*, void*)>(dlsym(dl_handle_, "test_signal_action"));
-
-    test_signal_handler_ =
-        reinterpret_cast<void (*)(int)>(dlsym(dl_handle_, "test_signal_handler"));
-  }
-
-  void SetUp() override {
-    ASSERT_TRUE(dl_handle_ != nullptr);
-    ASSERT_TRUE(test_level_one_ != nullptr);
-    ASSERT_TRUE(test_level_two_ != nullptr);
-    ASSERT_TRUE(test_level_three_ != nullptr);
-    ASSERT_TRUE(test_level_four_ != nullptr);
-    ASSERT_TRUE(test_recursive_call_ != nullptr);
-    ASSERT_TRUE(test_get_context_and_wait_ != nullptr);
-    ASSERT_TRUE(test_signal_action_ != nullptr);
-    ASSERT_TRUE(test_signal_handler_ != nullptr);
-  }
-
- public:
-  static void* dl_handle_;
-  static int (*test_level_one_)(int, int, int, int, void (*)(void*), void*);
-  static int (*test_level_two_)(int, int, int, int, void (*)(void*), void*);
-  static int (*test_level_three_)(int, int, int, int, void (*)(void*), void*);
-  static int (*test_level_four_)(int, int, int, int, void (*)(void*), void*);
-  static int (*test_recursive_call_)(int, void (*)(void*), void*);
-  static void (*test_get_context_and_wait_)(void*, volatile int*);
-  static void (*test_signal_action_)(int, siginfo_t*, void*);
-  static void (*test_signal_handler_)(int);
-};
-
-#endif  // _LIBBACKTRACE_BACKTRACE_TEST_H
diff --git a/libbacktrace/ThreadEntry.cpp b/libbacktrace/ThreadEntry.cpp
deleted file mode 100644
index 9bd59e4..0000000
--- a/libbacktrace/ThreadEntry.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <pthread.h>
-#include <stdint.h>
-#include <string.h>
-#include <sys/types.h>
-#include <time.h>
-#include <ucontext.h>
-
-#include "BacktraceAsyncSafeLog.h"
-#include "ThreadEntry.h"
-
-// Initialize static member variables.
-ThreadEntry* ThreadEntry::list_ = nullptr;
-pthread_mutex_t ThreadEntry::list_mutex_ = PTHREAD_MUTEX_INITIALIZER;
-
-// Assumes that ThreadEntry::list_mutex_ has already been locked before
-// creating a ThreadEntry object.
-ThreadEntry::ThreadEntry(pid_t pid, pid_t tid)
-    : pid_(pid), tid_(tid), ref_count_(1), mutex_(PTHREAD_MUTEX_INITIALIZER),
-      wait_mutex_(PTHREAD_MUTEX_INITIALIZER), wait_value_(0),
-      next_(ThreadEntry::list_), prev_(nullptr) {
-  pthread_condattr_t attr;
-  pthread_condattr_init(&attr);
-  pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
-  pthread_cond_init(&wait_cond_, &attr);
-
-  // Add ourselves to the list.
-  if (ThreadEntry::list_) {
-    ThreadEntry::list_->prev_ = this;
-  }
-  ThreadEntry::list_ = this;
-}
-
-ThreadEntry* ThreadEntry::Get(pid_t pid, pid_t tid, bool create) {
-  pthread_mutex_lock(&ThreadEntry::list_mutex_);
-  ThreadEntry* entry = list_;
-  while (entry != nullptr) {
-    if (entry->Match(pid, tid)) {
-      break;
-    }
-    entry = entry->next_;
-  }
-
-  if (!entry) {
-    if (create) {
-      entry = new ThreadEntry(pid, tid);
-    }
-  } else {
-    entry->ref_count_++;
-  }
-  pthread_mutex_unlock(&ThreadEntry::list_mutex_);
-
-  return entry;
-}
-
-void ThreadEntry::Remove(ThreadEntry* entry) {
-  entry->Unlock();
-
-  pthread_mutex_lock(&ThreadEntry::list_mutex_);
-  if (--entry->ref_count_ == 0) {
-    delete entry;
-  }
-  pthread_mutex_unlock(&ThreadEntry::list_mutex_);
-}
-
-// Assumes that ThreadEntry::list_mutex_ has already been locked before
-// deleting a ThreadEntry object.
-ThreadEntry::~ThreadEntry() {
-  if (list_ == this) {
-    list_ = next_;
-  } else {
-    if (next_) {
-      next_->prev_ = prev_;
-    }
-    prev_->next_ = next_;
-  }
-
-  next_ = nullptr;
-  prev_ = nullptr;
-
-  pthread_cond_destroy(&wait_cond_);
-}
-
-bool ThreadEntry::Wait(int value) {
-  timespec ts;
-  clock_gettime(CLOCK_MONOTONIC, &ts);
-  ts.tv_sec += 5;
-
-  bool wait_completed = true;
-  pthread_mutex_lock(&wait_mutex_);
-  while (wait_value_ != value) {
-    int ret = pthread_cond_timedwait(&wait_cond_, &wait_mutex_, &ts);
-    if (ret != 0) {
-      BACK_ASYNC_SAFE_LOGW("pthread_cond_timedwait for value %d failed: %s", value, strerror(ret));
-      wait_completed = false;
-      break;
-    }
-  }
-  pthread_mutex_unlock(&wait_mutex_);
-
-  return wait_completed;
-}
-
-void ThreadEntry::Wake() {
-  pthread_mutex_lock(&wait_mutex_);
-  wait_value_++;
-  pthread_mutex_unlock(&wait_mutex_);
-
-  pthread_cond_signal(&wait_cond_);
-}
-
-void ThreadEntry::CopyUcontextFromSigcontext(void* sigcontext) {
-  ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(sigcontext);
-  // The only thing the unwinder cares about is the mcontext data.
-  memcpy(&ucontext_.uc_mcontext, &ucontext->uc_mcontext, sizeof(ucontext->uc_mcontext));
-}
diff --git a/libbacktrace/ThreadEntry.h b/libbacktrace/ThreadEntry.h
deleted file mode 100644
index caa5497..0000000
--- a/libbacktrace/ThreadEntry.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_THREAD_ENTRY_H
-#define _LIBBACKTRACE_THREAD_ENTRY_H
-
-#include <pthread.h>
-#include <sys/types.h>
-#include <ucontext.h>
-
-class ThreadEntry {
- public:
-  static ThreadEntry* Get(pid_t pid, pid_t tid, bool create = true);
-
-  static void Remove(ThreadEntry* entry);
-
-  void Wake();
-
-  bool Wait(int);
-
-  void CopyUcontextFromSigcontext(void*);
-
-  inline void Lock() {
-    pthread_mutex_lock(&mutex_);
-
-    // Always reset the wait value since this could be the first or nth
-    // time this entry is locked.
-    wait_value_ = 0;
-  }
-
-  inline void Unlock() {
-    pthread_mutex_unlock(&mutex_);
-  }
-
-  inline ucontext_t* GetUcontext() { return &ucontext_; }
-
- private:
-  ThreadEntry(pid_t pid, pid_t tid);
-  ~ThreadEntry();
-
-  bool Match(pid_t chk_pid, pid_t chk_tid) { return (chk_pid == pid_ && chk_tid == tid_); }
-
-  pid_t pid_;
-  pid_t tid_;
-  int ref_count_;
-  pthread_mutex_t mutex_;
-  pthread_mutex_t wait_mutex_;
-  pthread_cond_t wait_cond_;
-  int wait_value_;
-  ThreadEntry* next_;
-  ThreadEntry* prev_;
-  ucontext_t ucontext_;
-
-  static ThreadEntry* list_;
-  static pthread_mutex_t list_mutex_;
-};
-
-#endif // _LIBBACKTRACE_THREAD_ENTRY_H
diff --git a/libbacktrace/UnwindMap.cpp b/libbacktrace/UnwindMap.cpp
deleted file mode 100644
index 798c769..0000000
--- a/libbacktrace/UnwindMap.cpp
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <pthread.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <backtrace/BacktraceMap.h>
-
-#include <libunwind.h>
-
-#include "BacktraceLog.h"
-#include "UnwindMap.h"
-
-//-------------------------------------------------------------------------
-// libunwind has a single shared address space for the current process
-// aka local. If multiple maps are created for the current pid, then
-// only update the local address space once, and keep a reference count
-// of maps using the same map cursor.
-//-------------------------------------------------------------------------
-UnwindMap::UnwindMap(pid_t pid) : BacktraceMap(pid) {
-  unw_map_cursor_clear(&map_cursor_);
-}
-
-UnwindMapRemote::UnwindMapRemote(pid_t pid) : UnwindMap(pid) {
-}
-
-UnwindMapRemote::~UnwindMapRemote() {
-  unw_map_cursor_destroy(&map_cursor_);
-  unw_map_cursor_clear(&map_cursor_);
-}
-
-bool UnwindMapRemote::GenerateMap() {
-  // Use the map_cursor information to construct the BacktraceMap data
-  // rather than reparsing /proc/self/maps.
-  unw_map_cursor_reset(&map_cursor_);
-
-  unw_map_t unw_map;
-  while (unw_map_cursor_get_next(&map_cursor_, &unw_map)) {
-    backtrace_map_t map;
-
-    map.start = unw_map.start;
-    map.end = unw_map.end;
-    map.offset = unw_map.offset;
-    map.load_bias = unw_map.load_base;
-    map.flags = unw_map.flags;
-    map.name = unw_map.path;
-
-    // The maps are in descending order, but we want them in ascending order.
-    maps_.push_front(map);
-  }
-
-  return true;
-}
-
-bool UnwindMapRemote::Build() {
-  return (unw_map_cursor_create(&map_cursor_, pid_) == 0) && GenerateMap();
-}
-
-UnwindMapLocal::UnwindMapLocal() : UnwindMap(getpid()), map_created_(false) {
-  pthread_rwlock_init(&map_lock_, nullptr);
-}
-
-UnwindMapLocal::~UnwindMapLocal() {
-  if (map_created_) {
-    unw_map_local_destroy();
-    unw_map_cursor_clear(&map_cursor_);
-  }
-}
-
-bool UnwindMapLocal::GenerateMap() {
-  // Lock so that multiple threads cannot modify the maps data at the
-  // same time.
-  pthread_rwlock_wrlock(&map_lock_);
-
-  // It's possible for the map to be regenerated while this loop is occurring.
-  // If that happens, get the map again, but only try at most three times
-  // before giving up.
-  bool generated = false;
-  for (int i = 0; i < 3; i++) {
-    maps_.clear();
-
-    // Save the map data retrieved so we can tell if it changes.
-    unw_map_local_cursor_get(&map_cursor_);
-
-    unw_map_t unw_map;
-    int ret;
-    while ((ret = unw_map_local_cursor_get_next(&map_cursor_, &unw_map)) > 0) {
-      backtrace_map_t map;
-
-      map.start = unw_map.start;
-      map.end = unw_map.end;
-      map.offset = unw_map.offset;
-      map.load_bias = unw_map.load_base;
-      map.flags = unw_map.flags;
-      map.name = unw_map.path;
-
-      free(unw_map.path);
-
-      // The maps are in descending order, but we want them in ascending order.
-      maps_.push_front(map);
-    }
-    // Check to see if the map changed while getting the data.
-    if (ret != -UNW_EINVAL) {
-      generated = true;
-      break;
-    }
-  }
-
-  pthread_rwlock_unlock(&map_lock_);
-
-  if (!generated) {
-    BACK_LOGW("Unable to generate the map.");
-  }
-  return generated;
-}
-
-bool UnwindMapLocal::Build() {
-  return (map_created_ = (unw_map_local_create() == 0)) && GenerateMap();;
-}
-
-void UnwindMapLocal::FillIn(uint64_t addr, backtrace_map_t* map) {
-  BacktraceMap::FillIn(addr, map);
-  if (!IsValid(*map)) {
-    // Check to see if the underlying map changed and regenerate the map
-    // if it did.
-    if (unw_map_local_cursor_valid(&map_cursor_) < 0) {
-      if (GenerateMap()) {
-        BacktraceMap::FillIn(addr, map);
-      }
-    }
-  }
-}
diff --git a/libbacktrace/UnwindMap.h b/libbacktrace/UnwindMap.h
deleted file mode 100644
index 15544e8..0000000
--- a/libbacktrace/UnwindMap.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_UNWIND_MAP_H
-#define _LIBBACKTRACE_UNWIND_MAP_H
-
-#include <pthread.h>
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <backtrace/BacktraceMap.h>
-
-// The unw_map_cursor_t structure is different depending on whether it is
-// the local or remote version. In order to get the correct version, include
-// libunwind.h first then this header.
-
-class UnwindMap : public BacktraceMap {
- public:
-  explicit UnwindMap(pid_t pid);
-
-  unw_map_cursor_t* GetMapCursor() { return &map_cursor_; }
-
- protected:
-  unw_map_cursor_t map_cursor_;
-};
-
-class UnwindMapRemote : public UnwindMap {
- public:
-  explicit UnwindMapRemote(pid_t pid);
-  virtual ~UnwindMapRemote();
-
-  bool Build() override;
-
- private:
-  bool GenerateMap();
-};
-
-class UnwindMapLocal : public UnwindMap {
- public:
-  UnwindMapLocal();
-  virtual ~UnwindMapLocal();
-
-  bool Build() override;
-
-  void FillIn(uint64_t addr, backtrace_map_t* map) override;
-
-  void LockIterator() override { pthread_rwlock_rdlock(&map_lock_); }
-  void UnlockIterator() override { pthread_rwlock_unlock(&map_lock_); }
-
- private:
-  bool GenerateMap();
-
-  bool map_created_;
-
-  pthread_rwlock_t map_lock_;
-};
-
-#endif // _LIBBACKTRACE_UNWIND_MAP_H
diff --git a/libbacktrace/UnwindStack.cpp b/libbacktrace/UnwindStack.cpp
deleted file mode 100644
index ae94903..0000000
--- a/libbacktrace/UnwindStack.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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.
- */
-
-#define _GNU_SOURCE 1
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <memory>
-#include <set>
-#include <string>
-
-#include <backtrace/Backtrace.h>
-#include <unwindstack/Elf.h>
-#include <unwindstack/MapInfo.h>
-#include <unwindstack/Maps.h>
-#include <unwindstack/Memory.h>
-#include <unwindstack/Regs.h>
-#include <unwindstack/RegsGetLocal.h>
-
-#if !defined(NO_LIBDEXFILE_SUPPORT)
-#include <unwindstack/DexFiles.h>
-#endif
-#include <unwindstack/Unwinder.h>
-
-#include "BacktraceLog.h"
-#include "UnwindStack.h"
-#include "UnwindStackMap.h"
-
-extern "C" char* __cxa_demangle(const char*, char*, size_t*, int*);
-
-bool Backtrace::Unwind(unwindstack::Regs* regs, BacktraceMap* back_map,
-                       std::vector<backtrace_frame_data_t>* frames, size_t num_ignore_frames,
-                       std::vector<std::string>* skip_names, BacktraceUnwindError* error) {
-  UnwindStackMap* stack_map = reinterpret_cast<UnwindStackMap*>(back_map);
-  auto process_memory = stack_map->process_memory();
-  unwindstack::Unwinder unwinder(MAX_BACKTRACE_FRAMES + num_ignore_frames, stack_map->stack_maps(),
-                                 regs, stack_map->process_memory());
-  unwinder.SetResolveNames(stack_map->ResolveNames());
-  stack_map->SetArch(regs->Arch());
-  if (stack_map->GetJitDebug() != nullptr) {
-    unwinder.SetJitDebug(stack_map->GetJitDebug());
-  }
-#if !defined(NO_LIBDEXFILE_SUPPORT)
-  if (stack_map->GetDexFiles() != nullptr) {
-    unwinder.SetDexFiles(stack_map->GetDexFiles());
-  }
-#endif
-  unwinder.Unwind(skip_names, &stack_map->GetSuffixesToIgnore());
-  if (error != nullptr) {
-    switch (unwinder.LastErrorCode()) {
-      case unwindstack::ERROR_NONE:
-        error->error_code = BACKTRACE_UNWIND_NO_ERROR;
-        break;
-
-      case unwindstack::ERROR_MEMORY_INVALID:
-        error->error_code = BACKTRACE_UNWIND_ERROR_ACCESS_MEM_FAILED;
-        error->error_info.addr = unwinder.LastErrorAddress();
-        break;
-
-      case unwindstack::ERROR_UNWIND_INFO:
-        error->error_code = BACKTRACE_UNWIND_ERROR_UNWIND_INFO;
-        break;
-
-      case unwindstack::ERROR_UNSUPPORTED:
-        error->error_code = BACKTRACE_UNWIND_ERROR_UNSUPPORTED_OPERATION;
-        break;
-
-      case unwindstack::ERROR_INVALID_MAP:
-        error->error_code = BACKTRACE_UNWIND_ERROR_MAP_MISSING;
-        break;
-
-      case unwindstack::ERROR_MAX_FRAMES_EXCEEDED:
-        error->error_code = BACKTRACE_UNWIND_ERROR_EXCEED_MAX_FRAMES_LIMIT;
-        break;
-
-      case unwindstack::ERROR_REPEATED_FRAME:
-        error->error_code = BACKTRACE_UNWIND_ERROR_REPEATED_FRAME;
-        break;
-
-      case unwindstack::ERROR_INVALID_ELF:
-        error->error_code = BACKTRACE_UNWIND_ERROR_INVALID_ELF;
-        break;
-
-      case unwindstack::ERROR_THREAD_DOES_NOT_EXIST:
-        error->error_code = BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST;
-        break;
-
-      case unwindstack::ERROR_THREAD_TIMEOUT:
-        error->error_code = BACKTRACE_UNWIND_ERROR_THREAD_TIMEOUT;
-        break;
-
-      case unwindstack::ERROR_SYSTEM_CALL:
-      case unwindstack::ERROR_PTRACE_CALL:
-      case unwindstack::ERROR_MAPS_PARSE:
-      case unwindstack::ERROR_BAD_ARCH:
-      case unwindstack::ERROR_INVALID_PARAMETER:
-        error->error_code = BACKTRACE_UNWIND_ERROR_INTERNAL;
-        break;
-    }
-  }
-
-  if (num_ignore_frames >= unwinder.NumFrames()) {
-    frames->resize(0);
-    return true;
-  }
-
-  auto unwinder_frames = unwinder.frames();
-  frames->resize(unwinder.NumFrames() - num_ignore_frames);
-  size_t cur_frame = 0;
-  for (size_t i = num_ignore_frames; i < unwinder.NumFrames(); i++) {
-    auto frame = &unwinder_frames[i];
-
-    backtrace_frame_data_t* back_frame = &frames->at(cur_frame);
-
-    back_frame->num = cur_frame++;
-
-    back_frame->rel_pc = frame->rel_pc;
-    back_frame->pc = frame->pc;
-    back_frame->sp = frame->sp;
-
-    char* demangled_name = __cxa_demangle(frame->function_name.c_str(), nullptr, nullptr, nullptr);
-    if (demangled_name != nullptr) {
-      back_frame->func_name = demangled_name;
-      free(demangled_name);
-    } else {
-      back_frame->func_name = frame->function_name;
-    }
-    back_frame->func_offset = frame->function_offset;
-
-    if (frame->map_info != nullptr) {
-      back_frame->map.name = frame->map_info->name();
-      back_frame->map.start = frame->map_info->start();
-      back_frame->map.end = frame->map_info->end();
-      back_frame->map.offset = frame->map_info->elf_start_offset();
-      back_frame->map.load_bias = frame->map_info->load_bias();
-      back_frame->map.flags = frame->map_info->flags();
-    } else {
-      back_frame->map.start = 0;
-      back_frame->map.end = 0;
-      back_frame->map.offset = 0;
-      back_frame->map.load_bias = 0;
-      back_frame->map.flags = 0;
-    }
-  }
-
-  return true;
-}
-
-UnwindStackCurrent::UnwindStackCurrent(pid_t pid, pid_t tid, BacktraceMap* map)
-    : BacktraceCurrent(pid, tid, map) {}
-
-std::string UnwindStackCurrent::GetFunctionNameRaw(uint64_t pc, uint64_t* offset) {
-  return GetMap()->GetFunctionName(pc, offset);
-}
-
-bool UnwindStackCurrent::UnwindFromContext(size_t num_ignore_frames, void* ucontext) {
-  std::unique_ptr<unwindstack::Regs> regs;
-  if (ucontext == nullptr) {
-    regs.reset(unwindstack::Regs::CreateFromLocal());
-    // Fill in the registers from this function. Do it here to avoid
-    // one extra function call appearing in the unwind.
-    unwindstack::RegsGetLocal(regs.get());
-  } else {
-    regs.reset(unwindstack::Regs::CreateFromUcontext(unwindstack::Regs::CurrentArch(), ucontext));
-  }
-
-  std::vector<std::string> skip_names{"libunwindstack.so", "libbacktrace.so"};
-  if (!skip_frames_) {
-    skip_names.clear();
-  }
-  return Backtrace::Unwind(regs.get(), GetMap(), &frames_, num_ignore_frames, &skip_names, &error_);
-}
-
-UnwindStackPtrace::UnwindStackPtrace(pid_t pid, pid_t tid, BacktraceMap* map)
-    : BacktracePtrace(pid, tid, map), memory_(unwindstack::Memory::CreateProcessMemory(pid)) {}
-
-std::string UnwindStackPtrace::GetFunctionNameRaw(uint64_t pc, uint64_t* offset) {
-  return GetMap()->GetFunctionName(pc, offset);
-}
-
-bool UnwindStackPtrace::Unwind(size_t num_ignore_frames, void* context) {
-  std::unique_ptr<unwindstack::Regs> regs;
-  if (context == nullptr) {
-    regs.reset(unwindstack::Regs::RemoteGet(Tid()));
-  } else {
-    regs.reset(unwindstack::Regs::CreateFromUcontext(unwindstack::Regs::CurrentArch(), context));
-  }
-
-  return Backtrace::Unwind(regs.get(), GetMap(), &frames_, num_ignore_frames, nullptr, &error_);
-}
-
-size_t UnwindStackPtrace::Read(uint64_t addr, uint8_t* buffer, size_t bytes) {
-#if defined(__aarch64__)
-  // Tagged pointer after Android R would lead top byte to have random values
-  // https://source.android.com/devices/tech/debug/tagged-pointers
-  addr &= (1ULL << 56) - 1;
-#endif
-  return memory_->Read(addr, buffer, bytes);
-}
diff --git a/libbacktrace/UnwindStack.h b/libbacktrace/UnwindStack.h
deleted file mode 100644
index 47f6757..0000000
--- a/libbacktrace/UnwindStack.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_UNWIND_STACK_H
-#define _LIBBACKTRACE_UNWIND_STACK_H
-
-#include <stdint.h>
-
-#include <memory>
-#include <string>
-
-#include <backtrace/BacktraceMap.h>
-#include <unwindstack/Memory.h>
-
-#include "BacktraceCurrent.h"
-#include "BacktracePtrace.h"
-
-class UnwindStackCurrent : public BacktraceCurrent {
- public:
-  UnwindStackCurrent(pid_t pid, pid_t tid, BacktraceMap* map);
-  virtual ~UnwindStackCurrent() = default;
-
-  std::string GetFunctionNameRaw(uint64_t pc, uint64_t* offset) override;
-
-  bool UnwindFromContext(size_t num_ignore_frames, void* ucontext) override;
-};
-
-class UnwindStackPtrace : public BacktracePtrace {
- public:
-  UnwindStackPtrace(pid_t pid, pid_t tid, BacktraceMap* map);
-  virtual ~UnwindStackPtrace() = default;
-
-  bool Unwind(size_t num_ignore_frames, void* context) override;
-
-  std::string GetFunctionNameRaw(uint64_t pc, uint64_t* offset) override;
-
-  size_t Read(uint64_t addr, uint8_t* buffer, size_t bytes) override;
-
- private:
-  std::shared_ptr<unwindstack::Memory> memory_;
-};
-
-#endif  // _LIBBACKTRACE_UNWIND_STACK_H
diff --git a/libbacktrace/UnwindStackMap.cpp b/libbacktrace/UnwindStackMap.cpp
deleted file mode 100644
index b0508d9..0000000
--- a/libbacktrace/UnwindStackMap.cpp
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <stdint.h>
-#include <stdlib.h>
-#include <sys/types.h>
-
-#include <string>
-#include <vector>
-
-#include <backtrace/BacktraceMap.h>
-#include <unwindstack/Elf.h>
-#include <unwindstack/MapInfo.h>
-#include <unwindstack/Maps.h>
-#include <unwindstack/Regs.h>
-
-#include "UnwindStackMap.h"
-
-//-------------------------------------------------------------------------
-UnwindStackMap::UnwindStackMap(pid_t pid) : BacktraceMap(pid) {}
-
-bool UnwindStackMap::Build() {
-  if (pid_ == 0) {
-    pid_ = getpid();
-    stack_maps_.reset(new unwindstack::LocalMaps);
-  } else {
-    stack_maps_.reset(new unwindstack::RemoteMaps(pid_));
-  }
-
-  // Create the process memory object.
-  process_memory_ = unwindstack::Memory::CreateProcessMemory(pid_);
-
-  if (arch_ == unwindstack::ARCH_UNKNOWN) {
-    if (pid_ == getpid()) {
-      arch_ = unwindstack::Regs::CurrentArch();
-    } else {
-      // Create a remote regs, to figure out the architecture.
-      std::unique_ptr<unwindstack::Regs> regs(unwindstack::Regs::RemoteGet(pid_));
-      if (regs.get() != nullptr) {
-        arch_ = regs->Arch();
-      }
-    }
-  }
-
-  // Create a JitDebug object for getting jit unwind information.
-  if (arch_ != unwindstack::ARCH_UNKNOWN) {
-    std::vector<std::string> search_libs_{"libart.so", "libartd.so"};
-    jit_debug_ = CreateJitDebug(arch_, process_memory_, search_libs_);
-#if !defined(NO_LIBDEXFILE_SUPPORT)
-    dex_files_ = CreateDexFiles(arch_, process_memory_, search_libs_);
-#endif
-  }
-
-  if (!stack_maps_->Parse()) {
-    return false;
-  }
-
-  // Iterate through the maps and fill in the backtrace_map_t structure.
-  for (const auto& map_info : *stack_maps_) {
-    backtrace_map_t map;
-    map.start = map_info->start();
-    map.end = map_info->end();
-    map.offset = map_info->offset();
-    // Set to -1 so that it is demand loaded.
-    map.load_bias = static_cast<uint64_t>(-1);
-    map.flags = map_info->flags();
-    map.name = map_info->name();
-
-    maps_.push_back(map);
-  }
-
-  return true;
-}
-
-void UnwindStackMap::FillIn(uint64_t addr, backtrace_map_t* map) {
-  BacktraceMap::FillIn(addr, map);
-  if (map->load_bias != static_cast<uint64_t>(-1)) {
-    return;
-  }
-
-  // Fill in the load_bias.
-  std::shared_ptr<unwindstack::MapInfo> map_info = stack_maps_->Find(addr);
-  if (map_info == nullptr) {
-    return;
-  }
-  map->load_bias = map_info->GetLoadBias(process_memory_);
-}
-
-std::string UnwindStackMap::GetBuildId(uint64_t addr) {
-  auto map_info = stack_maps_->Find(addr);
-  return map_info == nullptr ? std::string() : map_info->GetPrintableBuildID();
-}
-
-uint64_t UnwindStackMap::GetLoadBias(size_t index) {
-  if (index >= stack_maps_->Total()) {
-    return 0;
-  }
-
-  std::shared_ptr<unwindstack::MapInfo> map_info = stack_maps_->Get(index);
-  if (map_info == nullptr) {
-    return 0;
-  }
-  return map_info->GetLoadBias(process_memory_);
-}
-
-std::string UnwindStackMap::GetFunctionName(uint64_t pc, uint64_t* offset) {
-  *offset = 0;
-  unwindstack::Maps* maps = stack_maps();
-
-  // Get the map for this
-  auto map_info = maps->Find(pc);
-  if (map_info == nullptr || map_info->flags() & PROT_DEVICE_MAP) {
-    return "";
-  }
-
-  if (arch_ == unwindstack::ARCH_UNKNOWN) {
-    if (pid_ == getpid()) {
-      arch_ = unwindstack::Regs::CurrentArch();
-    } else {
-      // Create a remote regs, to figure out the architecture.
-      std::unique_ptr<unwindstack::Regs> regs(unwindstack::Regs::RemoteGet(pid_));
-      arch_ = regs->Arch();
-    }
-  }
-
-  unwindstack::Elf* elf = map_info->GetElf(process_memory(), arch_);
-
-  unwindstack::SharedString name;
-  uint64_t func_offset;
-  if (!elf->GetFunctionName(elf->GetRelPc(pc, map_info.get()), &name, &func_offset)) {
-    return "";
-  }
-  *offset = func_offset;
-  return name;
-}
-
-std::shared_ptr<unwindstack::Memory> UnwindStackMap::GetProcessMemory() {
-  return process_memory_;
-}
-
-//-------------------------------------------------------------------------
-// BacktraceMap create function.
-//-------------------------------------------------------------------------
-BacktraceMap* BacktraceMap::Create(pid_t pid, bool uncached) {
-  BacktraceMap* map;
-
-  if (uncached) {
-    // Force use of the base class to parse the maps when this call is made.
-    map = new BacktraceMap(pid);
-  } else if (pid == getpid()) {
-    map = new UnwindStackMap(0);
-  } else {
-    map = new UnwindStackMap(pid);
-  }
-  if (!map->Build()) {
-    delete map;
-    return nullptr;
-  }
-  return map;
-}
diff --git a/libbacktrace/UnwindStackMap.h b/libbacktrace/UnwindStackMap.h
deleted file mode 100644
index 3c2591e..0000000
--- a/libbacktrace/UnwindStackMap.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_UNWINDSTACK_MAP_H
-#define _LIBBACKTRACE_UNWINDSTACK_MAP_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <memory>
-#include <mutex>
-#include <unordered_map>
-#include <vector>
-
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-#if !defined(NO_LIBDEXFILE_SUPPORT)
-#include <unwindstack/DexFiles.h>
-#endif
-#include <unwindstack/Elf.h>
-#include <unwindstack/JitDebug.h>
-#include <unwindstack/Maps.h>
-#include <unwindstack/Memory.h>
-
-// Forward declarations.
-class UnwindDexFile;
-
-class UnwindStackMap : public BacktraceMap {
- public:
-  explicit UnwindStackMap(pid_t pid);
-  ~UnwindStackMap() = default;
-
-  bool Build() override;
-
-  void FillIn(uint64_t addr, backtrace_map_t* map) override;
-
-  std::string GetBuildId(uint64_t addr) override;
-
-  virtual std::string GetFunctionName(uint64_t pc, uint64_t* offset) override;
-  virtual std::shared_ptr<unwindstack::Memory> GetProcessMemory() override final;
-
-  unwindstack::Maps* stack_maps() { return stack_maps_.get(); }
-
-  const std::shared_ptr<unwindstack::Memory>& process_memory() { return process_memory_; }
-
-  unwindstack::JitDebug* GetJitDebug() { return jit_debug_.get(); }
-
-#if !defined(NO_LIBDEXFILE_SUPPORT)
-  unwindstack::DexFiles* GetDexFiles() { return dex_files_.get(); }
-#endif
-
-  void SetArch(unwindstack::ArchEnum arch) { arch_ = arch; }
-
- protected:
-  uint64_t GetLoadBias(size_t index) override;
-
-  std::unique_ptr<unwindstack::Maps> stack_maps_;
-  std::shared_ptr<unwindstack::Memory> process_memory_;
-  std::unique_ptr<unwindstack::JitDebug> jit_debug_;
-#if !defined(NO_LIBDEXFILE_SUPPORT)
-  std::unique_ptr<unwindstack::DexFiles> dex_files_;
-#endif
-
-  unwindstack::ArchEnum arch_ = unwindstack::ARCH_UNKNOWN;
-};
-
-#endif  // _LIBBACKTRACE_UNWINDSTACK_MAP_H
diff --git a/libbacktrace/backtrace_benchmarks.cpp b/libbacktrace/backtrace_benchmarks.cpp
deleted file mode 100644
index a93a25e..0000000
--- a/libbacktrace/backtrace_benchmarks.cpp
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/prctl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/threads.h>
-
-#include <benchmark/benchmark.h>
-
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-#include <unwindstack/Memory.h>
-
-constexpr size_t kNumMaps = 2000;
-
-static bool CountMaps(pid_t pid, size_t* num_maps) {
-  // Minimize the calls that might allocate memory. If too much memory
-  // gets allocated, then this routine will add extra maps and the next
-  // call will fail to get the same number of maps as before.
-  int fd =
-      open((std::string("/proc/") + std::to_string(pid) + "/maps").c_str(), O_RDONLY | O_CLOEXEC);
-  if (fd == -1) {
-    fprintf(stderr, "Cannot open map file for pid %d: %s\n", pid, strerror(errno));
-    return false;
-  }
-  *num_maps = 0;
-  while (true) {
-    char buffer[2048];
-    ssize_t bytes = read(fd, buffer, sizeof(buffer));
-    if (bytes <= 0) {
-      break;
-    }
-    // Count the '\n'.
-    for (size_t i = 0; i < static_cast<size_t>(bytes); i++) {
-      if (buffer[i] == '\n') {
-        ++*num_maps;
-      }
-    }
-  }
-
-  close(fd);
-  return true;
-}
-
-static void CreateMap(benchmark::State& state, BacktraceMap* (*map_func)(pid_t, bool)) {
-  // Create a remote process so that the map data is exactly the same.
-  // Also, so that we can create a set number of maps.
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    size_t num_maps;
-    if (!CountMaps(getpid(), &num_maps)) {
-      exit(1);
-    }
-    // Create uniquely named maps.
-    std::vector<void*> maps;
-    for (size_t i = num_maps; i < kNumMaps; i++) {
-      int flags = PROT_READ | PROT_WRITE;
-      // Alternate page type to make sure a map entry is added for each call.
-      if ((i % 2) == 0) {
-        flags |= PROT_EXEC;
-      }
-      void* memory = mmap(nullptr, PAGE_SIZE, flags, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-      if (memory == MAP_FAILED) {
-        fprintf(stderr, "Failed to create map: %s\n", strerror(errno));
-        exit(1);
-      }
-      memset(memory, 0x1, PAGE_SIZE);
-#if defined(PR_SET_VMA)
-      if (prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, memory, PAGE_SIZE, "test_map") == -1) {
-        fprintf(stderr, "Failed: %s\n", strerror(errno));
-      }
-#endif
-      maps.push_back(memory);
-    }
-
-    if (!CountMaps(getpid(), &num_maps)) {
-      exit(1);
-    }
-
-    if (num_maps < kNumMaps) {
-      fprintf(stderr, "Maps set incorrectly: %zu found, %zu expected at least.\n", num_maps,
-              kNumMaps);
-      std::string str;
-      android::base::ReadFileToString("/proc/self/maps", &str);
-      fprintf(stderr, "%s\n", str.c_str());
-      exit(1);
-    }
-
-    // Wait for an hour at most.
-    sleep(3600);
-    exit(1);
-  } else if (pid < 0) {
-    fprintf(stderr, "Fork failed: %s\n", strerror(errno));
-    return;
-  }
-
-  size_t num_maps = 0;
-  for (size_t i = 0; i < 2000; i++) {
-    if (CountMaps(pid, &num_maps) && num_maps >= kNumMaps) {
-      break;
-    }
-    usleep(1000);
-  }
-  if (num_maps < kNumMaps) {
-    fprintf(stderr, "Timed out waiting for the number of maps available: %zu\n", num_maps);
-    return;
-  }
-
-  while (state.KeepRunning()) {
-    BacktraceMap* map = map_func(pid, false);
-    if (map == nullptr) {
-      fprintf(stderr, "Failed to create map\n");
-      return;
-    }
-    delete map;
-  }
-
-  kill(pid, SIGKILL);
-  waitpid(pid, nullptr, 0);
-}
-
-static void BM_create_map(benchmark::State& state) {
-  CreateMap(state, BacktraceMap::Create);
-}
-BENCHMARK(BM_create_map);
-
-using BacktraceCreateFn = decltype(Backtrace::Create);
-
-static void CreateBacktrace(benchmark::State& state, BacktraceMap* map, BacktraceCreateFn fn) {
-  while (state.KeepRunning()) {
-    std::unique_ptr<Backtrace> backtrace(fn(getpid(), android::base::GetThreadId(), map));
-    backtrace->Unwind(0);
-  }
-}
-
-static void BM_create_backtrace(benchmark::State& state) {
-  std::unique_ptr<BacktraceMap> backtrace_map(BacktraceMap::Create(getpid()));
-  CreateBacktrace(state, backtrace_map.get(), Backtrace::Create);
-}
-BENCHMARK(BM_create_backtrace);
-
-BENCHMARK_MAIN();
diff --git a/libbacktrace/backtrace_read_benchmarks.cpp b/libbacktrace/backtrace_read_benchmarks.cpp
deleted file mode 100644
index 6a688b0..0000000
--- a/libbacktrace/backtrace_read_benchmarks.cpp
+++ /dev/null
@@ -1,197 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <signal.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/ptrace.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <memory>
-#include <vector>
-
-#include <benchmark/benchmark.h>
-
-#include <backtrace/Backtrace.h>
-
-#define AT_COMMON_SIZES Arg(1)->Arg(4)->Arg(8)->Arg(16)->Arg(100)->Arg(200)->Arg(500)->Arg(1024)
-
-static void Attach(pid_t pid) {
-  if (ptrace(PTRACE_ATTACH, pid, 0, 0) == -1) {
-    perror("Failed to attach");
-    abort();
-  }
-
-  siginfo_t si;
-  // Wait for up to 5 seconds.
-  for (size_t i = 0; i < 5000; i++) {
-    if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {
-      return;
-    }
-    usleep(1000);
-  }
-  printf("Remote process failed to stop in five seconds.\n");
-  abort();
-}
-
-class ScopedPidReaper {
- public:
-  ScopedPidReaper(pid_t pid) : pid_(pid) {}
-  ~ScopedPidReaper() {
-    kill(pid_, SIGKILL);
-    waitpid(pid_, nullptr, 0);
-  }
-
- private:
-  pid_t pid_;
-};
-
-static size_t ProcessVmRead(pid_t pid, uint64_t remote_src, void* dst, size_t len) {
-  struct iovec dst_iov = {
-      .iov_base = dst, .iov_len = len,
-  };
-
-  struct iovec src_iov = {
-      .iov_base = reinterpret_cast<void*>(remote_src), .iov_len = len,
-  };
-
-  ssize_t rc = process_vm_readv(pid, &dst_iov, 1, &src_iov, 1, 0);
-  return rc == -1 ? 0 : rc;
-}
-
-static bool PtraceReadLong(pid_t pid, uint64_t addr, long* value) {
-  // ptrace() returns -1 and sets errno when the operation fails.
-  // To disambiguate -1 from a valid result, we clear errno beforehand.
-  errno = 0;
-  *value = ptrace(PTRACE_PEEKTEXT, pid, reinterpret_cast<void*>(addr), nullptr);
-  if (*value == -1 && errno) {
-    return false;
-  }
-  return true;
-}
-
-static size_t PtraceRead(pid_t pid, uint64_t addr, void* dst, size_t bytes) {
-  size_t bytes_read = 0;
-  long data;
-  for (size_t i = 0; i < bytes / sizeof(long); i++) {
-    if (!PtraceReadLong(pid, addr, &data)) {
-      return bytes_read;
-    }
-    memcpy(dst, &data, sizeof(long));
-    dst = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(dst) + sizeof(long));
-    addr += sizeof(long);
-    bytes_read += sizeof(long);
-  }
-
-  size_t left_over = bytes & (sizeof(long) - 1);
-  if (left_over) {
-    if (!PtraceReadLong(pid, addr, &data)) {
-      return bytes_read;
-    }
-    memcpy(dst, &data, left_over);
-    bytes_read += left_over;
-  }
-  return bytes_read;
-}
-
-static void CreateRemoteProcess(size_t size, void** map, pid_t* pid) {
-  *map = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  if (*map == MAP_FAILED) {
-    perror("Can't allocate memory");
-    abort();
-  }
-  memset(*map, 0xaa, size);
-
-  if ((*pid = fork()) == 0) {
-    for (volatile int i = 0;; i++)
-      ;
-    exit(1);
-  }
-  if (*pid < 0) {
-    perror("Failed to fork");
-    abort();
-  }
-  Attach(*pid);
-  // Don't need this map in the current process any more.
-  munmap(*map, size);
-}
-
-static void BM_read_with_ptrace(benchmark::State& state) {
-  void* map;
-  pid_t pid;
-  CreateRemoteProcess(state.range(0), &map, &pid);
-  ScopedPidReaper reap(pid);
-
-  std::vector<uint8_t> read_buffer(state.range(0));
-  uint64_t addr = reinterpret_cast<uint64_t>(map);
-  while (state.KeepRunning()) {
-    if (PtraceRead(pid, addr, read_buffer.data(), read_buffer.size()) != read_buffer.size()) {
-      printf("Unexpected bad read.\n");
-      abort();
-    }
-  }
-  ptrace(PTRACE_DETACH, pid, 0, 0);
-}
-BENCHMARK(BM_read_with_ptrace)->AT_COMMON_SIZES;
-
-static void BM_read_with_process_vm_read(benchmark::State& state) {
-  void* map;
-  pid_t pid;
-  CreateRemoteProcess(state.range(0), &map, &pid);
-  ScopedPidReaper reap(pid);
-
-  std::vector<uint8_t> read_buffer(state.range(0));
-  uint64_t addr = reinterpret_cast<uint64_t>(map);
-  while (state.KeepRunning()) {
-    if (ProcessVmRead(pid, addr, read_buffer.data(), read_buffer.size()) != read_buffer.size()) {
-      printf("Unexpected bad read.\n");
-      abort();
-    }
-  }
-  ptrace(PTRACE_DETACH, pid, 0, 0);
-}
-BENCHMARK(BM_read_with_process_vm_read)->AT_COMMON_SIZES;
-
-static void BM_read_with_backtrace_object(benchmark::State& state) {
-  void* map;
-  pid_t pid;
-  CreateRemoteProcess(state.range(0), &map, &pid);
-  ScopedPidReaper reap(pid);
-
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, BACKTRACE_CURRENT_THREAD));
-  if (backtrace.get() == nullptr) {
-    printf("Failed to create backtrace.\n");
-    abort();
-  }
-
-  uint64_t addr = reinterpret_cast<uint64_t>(map);
-  std::vector<uint8_t> read_buffer(state.range(0));
-  while (state.KeepRunning()) {
-    if (backtrace->Read(addr, read_buffer.data(), read_buffer.size()) != read_buffer.size()) {
-      printf("Unexpected bad read.\n");
-      abort();
-    }
-  }
-  ptrace(PTRACE_DETACH, pid, 0, 0);
-}
-BENCHMARK(BM_read_with_backtrace_object)->AT_COMMON_SIZES;
diff --git a/libbacktrace/backtrace_test.cpp b/libbacktrace/backtrace_test.cpp
deleted file mode 100644
index b978349..0000000
--- a/libbacktrace/backtrace_test.cpp
+++ /dev/null
@@ -1,1910 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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.
- */
-
-#define _GNU_SOURCE 1
-#include <dirent.h>
-#include <dlfcn.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <malloc.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ptrace.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <time.h>
-#include <ucontext.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <list>
-#include <memory>
-#include <ostream>
-#include <string>
-#include <vector>
-
-#include <backtrace/Backtrace.h>
-#include <backtrace/BacktraceMap.h>
-
-#include <android-base/file.h>
-#include <android-base/macros.h>
-#include <android-base/stringprintf.h>
-#include <android-base/test_utils.h>
-#include <android-base/threads.h>
-#include <android-base/unique_fd.h>
-#include <cutils/atomic.h>
-
-#include <gtest/gtest.h>
-
-// For the THREAD_SIGNAL definition.
-#include "BacktraceCurrent.h"
-#include "BacktraceTest.h"
-#include "backtrace_testlib.h"
-
-// Number of microseconds per milliseconds.
-#define US_PER_MSEC             1000
-
-// Number of nanoseconds in a second.
-#define NS_PER_SEC              1000000000ULL
-
-// Number of simultaneous dumping operations to perform.
-#define NUM_THREADS  40
-
-// Number of simultaneous threads running in our forked process.
-#define NUM_PTRACE_THREADS 5
-
-// The list of shared libaries that make up the backtrace library.
-static std::vector<std::string> kBacktraceLibs{"libunwindstack.so", "libbacktrace.so"};
-
-struct thread_t {
-  pid_t tid;
-  int32_t state;
-  pthread_t threadId;
-  void* data;
-};
-
-struct dump_thread_t {
-  thread_t thread;
-  BacktraceMap* map;
-  Backtrace* backtrace;
-  int32_t* now;
-  int32_t done;
-};
-
-typedef Backtrace* (*create_func_t)(pid_t, pid_t, BacktraceMap*);
-typedef BacktraceMap* (*map_create_func_t)(pid_t, bool);
-
-static void VerifyLevelDump(Backtrace* backtrace, create_func_t create_func = nullptr,
-                            map_create_func_t map_func = nullptr);
-static void VerifyMaxDump(Backtrace* backtrace, create_func_t create_func = nullptr,
-                          map_create_func_t map_func = nullptr);
-
-void* BacktraceTest::dl_handle_;
-int (*BacktraceTest::test_level_one_)(int, int, int, int, void (*)(void*), void*);
-int (*BacktraceTest::test_level_two_)(int, int, int, int, void (*)(void*), void*);
-int (*BacktraceTest::test_level_three_)(int, int, int, int, void (*)(void*), void*);
-int (*BacktraceTest::test_level_four_)(int, int, int, int, void (*)(void*), void*);
-int (*BacktraceTest::test_recursive_call_)(int, void (*)(void*), void*);
-void (*BacktraceTest::test_get_context_and_wait_)(void*, volatile int*);
-void (*BacktraceTest::test_signal_action_)(int, siginfo_t*, void*);
-void (*BacktraceTest::test_signal_handler_)(int);
-
-extern "C" bool GetInitialArgs(const char*** args, size_t* num_args) {
-  static const char* initial_args[] = {"--slow_threshold_ms=8000", "--deadline_threshold_ms=15000"};
-  *args = initial_args;
-  *num_args = 2;
-  return true;
-}
-
-static uint64_t NanoTime() {
-  struct timespec t = { 0, 0 };
-  clock_gettime(CLOCK_MONOTONIC, &t);
-  return static_cast<uint64_t>(t.tv_sec * NS_PER_SEC + t.tv_nsec);
-}
-
-static std::string DumpFrames(Backtrace* backtrace) {
-  if (backtrace->NumFrames() == 0) {
-    return "   No frames to dump.\n";
-  }
-
-  std::string frame;
-  for (size_t i = 0; i < backtrace->NumFrames(); i++) {
-    frame += "   " + backtrace->FormatFrameData(i) + '\n';
-  }
-  return frame;
-}
-
-static void WaitForStop(pid_t pid) {
-  uint64_t start = NanoTime();
-
-  siginfo_t si;
-  while (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) < 0 && (errno == EINTR || errno == ESRCH)) {
-    if ((NanoTime() - start) > NS_PER_SEC) {
-      printf("The process did not get to a stopping point in 1 second.\n");
-      break;
-    }
-    usleep(US_PER_MSEC);
-  }
-}
-
-static void CreateRemoteProcess(pid_t* pid) {
-  if ((*pid = fork()) == 0) {
-    while (true)
-      ;
-    _exit(0);
-  }
-  ASSERT_NE(-1, *pid);
-
-  ASSERT_TRUE(ptrace(PTRACE_ATTACH, *pid, 0, 0) == 0);
-
-  // Wait for the process to get to a stopping point.
-  WaitForStop(*pid);
-}
-
-static void FinishRemoteProcess(pid_t pid) {
-  ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
-
-  kill(pid, SIGKILL);
-  ASSERT_EQ(waitpid(pid, nullptr, 0), pid);
-}
-
-#if !defined(__ANDROID__) || defined(__arm__)
-// On host and arm target we aren't guaranteed that we will terminate cleanly.
-#define VERIFY_NO_ERROR(error_code)                               \
-  ASSERT_TRUE(error_code == BACKTRACE_UNWIND_NO_ERROR ||          \
-              error_code == BACKTRACE_UNWIND_ERROR_UNWIND_INFO || \
-              error_code == BACKTRACE_UNWIND_ERROR_MAP_MISSING)   \
-      << "Unknown error code " << std::to_string(error_code);
-#else
-#define VERIFY_NO_ERROR(error_code) ASSERT_EQ(BACKTRACE_UNWIND_NO_ERROR, error_code);
-#endif
-
-static bool ReadyLevelBacktrace(Backtrace* backtrace) {
-  // See if test_level_four is in the backtrace.
-  bool found = false;
-  for (Backtrace::const_iterator it = backtrace->begin(); it != backtrace->end(); ++it) {
-    if (it->func_name == "test_level_four") {
-      found = true;
-      break;
-    }
-  }
-
-  return found;
-}
-
-static void VerifyLevelDump(Backtrace* backtrace, create_func_t, map_create_func_t) {
-  ASSERT_GT(backtrace->NumFrames(), static_cast<size_t>(0))
-    << DumpFrames(backtrace);
-  ASSERT_LT(backtrace->NumFrames(), static_cast<size_t>(MAX_BACKTRACE_FRAMES))
-    << DumpFrames(backtrace);
-
-  // Look through the frames starting at the highest to find the
-  // frame we want.
-  size_t frame_num = 0;
-  for (size_t i = backtrace->NumFrames()-1; i > 2; i--) {
-    if (backtrace->GetFrame(i)->func_name == "test_level_one") {
-      frame_num = i;
-      break;
-    }
-  }
-  ASSERT_LT(static_cast<size_t>(0), frame_num) << DumpFrames(backtrace);
-  ASSERT_LE(static_cast<size_t>(3), frame_num) << DumpFrames(backtrace);
-
-  ASSERT_EQ(backtrace->GetFrame(frame_num)->func_name, "test_level_one")
-    << DumpFrames(backtrace);
-  ASSERT_EQ(backtrace->GetFrame(frame_num-1)->func_name, "test_level_two")
-    << DumpFrames(backtrace);
-  ASSERT_EQ(backtrace->GetFrame(frame_num-2)->func_name, "test_level_three")
-    << DumpFrames(backtrace);
-  ASSERT_EQ(backtrace->GetFrame(frame_num-3)->func_name, "test_level_four")
-    << DumpFrames(backtrace);
-}
-
-static void VerifyLevelBacktrace(void*) {
-  std::unique_ptr<Backtrace> backtrace(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-  VerifyLevelDump(backtrace.get());
-}
-
-static bool ReadyMaxBacktrace(Backtrace* backtrace) {
-  return (backtrace->NumFrames() == MAX_BACKTRACE_FRAMES);
-}
-
-static void VerifyMaxDump(Backtrace* backtrace, create_func_t, map_create_func_t) {
-  ASSERT_EQ(backtrace->NumFrames(), static_cast<size_t>(MAX_BACKTRACE_FRAMES))
-    << DumpFrames(backtrace);
-  // Verify that the last frame is our recursive call.
-  ASSERT_EQ(backtrace->GetFrame(MAX_BACKTRACE_FRAMES-1)->func_name, "test_recursive_call")
-    << DumpFrames(backtrace);
-}
-
-static void VerifyMaxBacktrace(void*) {
-  std::unique_ptr<Backtrace> backtrace(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  ASSERT_EQ(BACKTRACE_UNWIND_ERROR_EXCEED_MAX_FRAMES_LIMIT, backtrace->GetError().error_code);
-
-  VerifyMaxDump(backtrace.get());
-}
-
-static void ThreadSetState(void* data) {
-  thread_t* thread = reinterpret_cast<thread_t*>(data);
-  android_atomic_acquire_store(1, &thread->state);
-  volatile int i = 0;
-  while (thread->state) {
-    i++;
-  }
-}
-
-static bool WaitForNonZero(int32_t* value, uint64_t seconds) {
-  uint64_t start = NanoTime();
-  do {
-    if (android_atomic_acquire_load(value)) {
-      return true;
-    }
-  } while ((NanoTime() - start) < seconds * NS_PER_SEC);
-  return false;
-}
-
-TEST_F(BacktraceTest, local_no_unwind_frames) {
-  // Verify that a local unwind does not include any frames within
-  // libunwind or libbacktrace.
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), getpid()));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-  ASSERT_TRUE(backtrace->NumFrames() != 0);
-  // None of the frames should be in the backtrace libraries.
-  for (const auto& frame : *backtrace ) {
-    if (BacktraceMap::IsValid(frame.map)) {
-      const std::string name = android::base::Basename(frame.map.name);
-      for (const auto& lib : kBacktraceLibs) {
-        ASSERT_TRUE(name != lib) << DumpFrames(backtrace.get());
-      }
-    }
-  }
-}
-
-TEST_F(BacktraceTest, local_unwind_frames) {
-  // Verify that a local unwind with the skip frames disabled does include
-  // frames within the backtrace libraries.
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), getpid()));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  backtrace->SetSkipFrames(false);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-  ASSERT_TRUE(backtrace->NumFrames() != 0);
-  size_t first_frame_non_backtrace_lib = 0;
-  for (const auto& frame : *backtrace) {
-    if (BacktraceMap::IsValid(frame.map)) {
-      const std::string name = android::base::Basename(frame.map.name);
-      bool found = false;
-      for (const auto& lib : kBacktraceLibs) {
-        if (name == lib) {
-          found = true;
-          break;
-        }
-      }
-      if (!found) {
-        first_frame_non_backtrace_lib = frame.num;
-        break;
-      }
-    }
-  }
-
-  ASSERT_NE(0U, first_frame_non_backtrace_lib) << "No frames found in backtrace libraries:\n"
-                                               << DumpFrames(backtrace.get());
-}
-
-TEST_F(BacktraceTest, local_trace) {
-  ASSERT_NE(test_level_one_(1, 2, 3, 4, VerifyLevelBacktrace, nullptr), 0);
-}
-
-static void VerifyIgnoreFrames(Backtrace* bt_all, Backtrace* bt_ign1, Backtrace* bt_ign2,
-                               const char* cur_proc) {
-  ASSERT_EQ(bt_all->NumFrames(), bt_ign1->NumFrames() + 1) << "All backtrace:\n"
-                                                           << DumpFrames(bt_all)
-                                                           << "Ignore 1 backtrace:\n"
-                                                           << DumpFrames(bt_ign1);
-  ASSERT_EQ(bt_all->NumFrames(), bt_ign2->NumFrames() + 2) << "All backtrace:\n"
-                                                           << DumpFrames(bt_all)
-                                                           << "Ignore 2 backtrace:\n"
-                                                           << DumpFrames(bt_ign2);
-
-  // Check all of the frames are the same > the current frame.
-  bool check = (cur_proc == nullptr);
-  for (size_t i = 0; i < bt_ign2->NumFrames(); i++) {
-    if (check) {
-      EXPECT_EQ(bt_ign2->GetFrame(i)->pc, bt_ign1->GetFrame(i+1)->pc);
-      EXPECT_EQ(bt_ign2->GetFrame(i)->sp, bt_ign1->GetFrame(i+1)->sp);
-      EXPECT_EQ(bt_ign2->GetFrame(i)->stack_size, bt_ign1->GetFrame(i+1)->stack_size);
-
-      EXPECT_EQ(bt_ign2->GetFrame(i)->pc, bt_all->GetFrame(i+2)->pc);
-      EXPECT_EQ(bt_ign2->GetFrame(i)->sp, bt_all->GetFrame(i+2)->sp);
-      EXPECT_EQ(bt_ign2->GetFrame(i)->stack_size, bt_all->GetFrame(i+2)->stack_size);
-    }
-    if (!check && bt_ign2->GetFrame(i)->func_name == cur_proc) {
-      check = true;
-    }
-  }
-}
-
-static void VerifyLevelIgnoreFrames(void*) {
-  std::unique_ptr<Backtrace> all(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(all.get() != nullptr);
-  ASSERT_TRUE(all->Unwind(0));
-  VERIFY_NO_ERROR(all->GetError().error_code);
-
-  std::unique_ptr<Backtrace> ign1(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(ign1.get() != nullptr);
-  ASSERT_TRUE(ign1->Unwind(1));
-  VERIFY_NO_ERROR(ign1->GetError().error_code);
-
-  std::unique_ptr<Backtrace> ign2(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(ign2.get() != nullptr);
-  ASSERT_TRUE(ign2->Unwind(2));
-  VERIFY_NO_ERROR(ign2->GetError().error_code);
-
-  VerifyIgnoreFrames(all.get(), ign1.get(), ign2.get(), "VerifyLevelIgnoreFrames");
-}
-
-TEST_F(BacktraceTest, local_trace_ignore_frames) {
-  ASSERT_NE(test_level_one_(1, 2, 3, 4, VerifyLevelIgnoreFrames, nullptr), 0);
-}
-
-TEST_F(BacktraceTest, local_max_trace) {
-  ASSERT_NE(test_recursive_call_(MAX_BACKTRACE_FRAMES + 10, VerifyMaxBacktrace, nullptr), 0);
-}
-
-static void VerifyProcTest(pid_t pid, pid_t tid, bool (*ReadyFunc)(Backtrace*),
-                           void (*VerifyFunc)(Backtrace*, create_func_t, map_create_func_t),
-                           create_func_t create_func, map_create_func_t map_create_func) {
-  pid_t ptrace_tid;
-  if (tid < 0) {
-    ptrace_tid = pid;
-  } else {
-    ptrace_tid = tid;
-  }
-  uint64_t start = NanoTime();
-  bool verified = false;
-  std::string last_dump;
-  do {
-    usleep(US_PER_MSEC);
-    if (ptrace(PTRACE_ATTACH, ptrace_tid, 0, 0) == 0) {
-      // Wait for the process to get to a stopping point.
-      WaitForStop(ptrace_tid);
-
-      std::unique_ptr<BacktraceMap> map;
-      map.reset(map_create_func(pid, false));
-      std::unique_ptr<Backtrace> backtrace(create_func(pid, tid, map.get()));
-      ASSERT_TRUE(backtrace.get() != nullptr);
-      ASSERT_TRUE(backtrace->Unwind(0));
-      if (ReadyFunc(backtrace.get())) {
-        VerifyFunc(backtrace.get(), create_func, map_create_func);
-        verified = true;
-      } else {
-        last_dump = DumpFrames(backtrace.get());
-      }
-
-      ASSERT_TRUE(ptrace(PTRACE_DETACH, ptrace_tid, 0, 0) == 0);
-    }
-    // If 5 seconds have passed, then we are done.
-  } while (!verified && (NanoTime() - start) <= 5 * NS_PER_SEC);
-  ASSERT_TRUE(verified) << "Last backtrace:\n" << last_dump;
-}
-
-TEST_F(BacktraceTest, ptrace_trace) {
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    ASSERT_NE(test_level_one_(1, 2, 3, 4, nullptr, nullptr), 0);
-    _exit(1);
-  }
-  VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, ReadyLevelBacktrace, VerifyLevelDump,
-                 Backtrace::Create, BacktraceMap::Create);
-
-  kill(pid, SIGKILL);
-  int status;
-  ASSERT_EQ(waitpid(pid, &status, 0), pid);
-}
-
-TEST_F(BacktraceTest, ptrace_max_trace) {
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    ASSERT_NE(test_recursive_call_(MAX_BACKTRACE_FRAMES + 10, nullptr, nullptr), 0);
-    _exit(1);
-  }
-  VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, ReadyMaxBacktrace, VerifyMaxDump, Backtrace::Create,
-                 BacktraceMap::Create);
-
-  kill(pid, SIGKILL);
-  int status;
-  ASSERT_EQ(waitpid(pid, &status, 0), pid);
-}
-
-static void VerifyProcessIgnoreFrames(Backtrace* bt_all, create_func_t create_func,
-                                      map_create_func_t map_create_func) {
-  std::unique_ptr<BacktraceMap> map(map_create_func(bt_all->Pid(), false));
-  std::unique_ptr<Backtrace> ign1(create_func(bt_all->Pid(), BACKTRACE_CURRENT_THREAD, map.get()));
-  ASSERT_TRUE(ign1.get() != nullptr);
-  ASSERT_TRUE(ign1->Unwind(1));
-  VERIFY_NO_ERROR(ign1->GetError().error_code);
-
-  std::unique_ptr<Backtrace> ign2(create_func(bt_all->Pid(), BACKTRACE_CURRENT_THREAD, map.get()));
-  ASSERT_TRUE(ign2.get() != nullptr);
-  ASSERT_TRUE(ign2->Unwind(2));
-  VERIFY_NO_ERROR(ign2->GetError().error_code);
-
-  VerifyIgnoreFrames(bt_all, ign1.get(), ign2.get(), nullptr);
-}
-
-TEST_F(BacktraceTest, ptrace_ignore_frames) {
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    ASSERT_NE(test_level_one_(1, 2, 3, 4, nullptr, nullptr), 0);
-    _exit(1);
-  }
-  VerifyProcTest(pid, BACKTRACE_CURRENT_THREAD, ReadyLevelBacktrace, VerifyProcessIgnoreFrames,
-                 Backtrace::Create, BacktraceMap::Create);
-
-  kill(pid, SIGKILL);
-  int status;
-  ASSERT_EQ(waitpid(pid, &status, 0), pid);
-}
-
-// Create a process with multiple threads and dump all of the threads.
-static void* PtraceThreadLevelRun(void*) {
-  EXPECT_NE(BacktraceTest::test_level_one_(1, 2, 3, 4, nullptr, nullptr), 0);
-  return nullptr;
-}
-
-static void GetThreads(pid_t pid, std::vector<pid_t>* threads) {
-  // Get the list of tasks.
-  char task_path[128];
-  snprintf(task_path, sizeof(task_path), "/proc/%d/task", pid);
-
-  std::unique_ptr<DIR, decltype(&closedir)> tasks_dir(opendir(task_path), closedir);
-  ASSERT_TRUE(tasks_dir != nullptr);
-  struct dirent* entry;
-  while ((entry = readdir(tasks_dir.get())) != nullptr) {
-    char* end;
-    pid_t tid = strtoul(entry->d_name, &end, 10);
-    if (*end == '\0') {
-      threads->push_back(tid);
-    }
-  }
-}
-
-TEST_F(BacktraceTest, ptrace_threads) {
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    for (size_t i = 0; i < NUM_PTRACE_THREADS; i++) {
-      pthread_attr_t attr;
-      pthread_attr_init(&attr);
-      pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-
-      pthread_t thread;
-      ASSERT_TRUE(pthread_create(&thread, &attr, PtraceThreadLevelRun, nullptr) == 0);
-    }
-    ASSERT_NE(test_level_one_(1, 2, 3, 4, nullptr, nullptr), 0);
-    _exit(1);
-  }
-
-  // Check to see that all of the threads are running before unwinding.
-  std::vector<pid_t> threads;
-  uint64_t start = NanoTime();
-  do {
-    usleep(US_PER_MSEC);
-    threads.clear();
-    GetThreads(pid, &threads);
-  } while ((threads.size() != NUM_PTRACE_THREADS + 1) &&
-      ((NanoTime() - start) <= 5 * NS_PER_SEC));
-  ASSERT_EQ(threads.size(), static_cast<size_t>(NUM_PTRACE_THREADS + 1));
-
-  ASSERT_TRUE(ptrace(PTRACE_ATTACH, pid, 0, 0) == 0);
-  WaitForStop(pid);
-  for (std::vector<int>::const_iterator it = threads.begin(); it != threads.end(); ++it) {
-    // Skip the current forked process, we only care about the threads.
-    if (pid == *it) {
-      continue;
-    }
-    VerifyProcTest(pid, *it, ReadyLevelBacktrace, VerifyLevelDump, Backtrace::Create,
-                   BacktraceMap::Create);
-  }
-
-  FinishRemoteProcess(pid);
-}
-
-void VerifyLevelThread(void*) {
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), android::base::GetThreadId()));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-  VerifyLevelDump(backtrace.get());
-}
-
-TEST_F(BacktraceTest, thread_current_level) {
-  ASSERT_NE(test_level_one_(1, 2, 3, 4, VerifyLevelThread, nullptr), 0);
-}
-
-static void VerifyMaxThread(void*) {
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), android::base::GetThreadId()));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  ASSERT_EQ(BACKTRACE_UNWIND_ERROR_EXCEED_MAX_FRAMES_LIMIT, backtrace->GetError().error_code);
-
-  VerifyMaxDump(backtrace.get());
-}
-
-TEST_F(BacktraceTest, thread_current_max) {
-  ASSERT_NE(test_recursive_call_(MAX_BACKTRACE_FRAMES + 10, VerifyMaxThread, nullptr), 0);
-}
-
-static void* ThreadLevelRun(void* data) {
-  thread_t* thread = reinterpret_cast<thread_t*>(data);
-
-  thread->tid = android::base::GetThreadId();
-  EXPECT_NE(BacktraceTest::test_level_one_(1, 2, 3, 4, ThreadSetState, data), 0);
-  return nullptr;
-}
-
-TEST_F(BacktraceTest, thread_level_trace) {
-  pthread_attr_t attr;
-  pthread_attr_init(&attr);
-  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-
-  thread_t thread_data = { 0, 0, 0, nullptr };
-  pthread_t thread;
-  ASSERT_TRUE(pthread_create(&thread, &attr, ThreadLevelRun, &thread_data) == 0);
-
-  // Wait up to 2 seconds for the tid to be set.
-  ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
-
-  // Make sure that the thread signal used is not visible when compiled for
-  // the target.
-#if !defined(__GLIBC__)
-  ASSERT_LT(THREAD_SIGNAL, SIGRTMIN);
-#endif
-
-  // Save the current signal action and make sure it is restored afterwards.
-  struct sigaction cur_action;
-  ASSERT_TRUE(sigaction(THREAD_SIGNAL, nullptr, &cur_action) == 0);
-
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), thread_data.tid));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-  VerifyLevelDump(backtrace.get());
-
-  // Tell the thread to exit its infinite loop.
-  android_atomic_acquire_store(0, &thread_data.state);
-
-  // Verify that the old action was restored.
-  struct sigaction new_action;
-  ASSERT_TRUE(sigaction(THREAD_SIGNAL, nullptr, &new_action) == 0);
-  EXPECT_EQ(cur_action.sa_sigaction, new_action.sa_sigaction);
-  // The SA_RESTORER flag gets set behind our back, so a direct comparison
-  // doesn't work unless we mask the value off. Mips doesn't have this
-  // flag, so skip this on that platform.
-#if defined(SA_RESTORER)
-  cur_action.sa_flags &= ~SA_RESTORER;
-  new_action.sa_flags &= ~SA_RESTORER;
-#elif defined(__GLIBC__)
-  // Our host compiler doesn't appear to define this flag for some reason.
-  cur_action.sa_flags &= ~0x04000000;
-  new_action.sa_flags &= ~0x04000000;
-#endif
-  EXPECT_EQ(cur_action.sa_flags, new_action.sa_flags);
-}
-
-TEST_F(BacktraceTest, thread_ignore_frames) {
-  pthread_attr_t attr;
-  pthread_attr_init(&attr);
-  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-
-  thread_t thread_data = { 0, 0, 0, nullptr };
-  pthread_t thread;
-  ASSERT_TRUE(pthread_create(&thread, &attr, ThreadLevelRun, &thread_data) == 0);
-
-  // Wait up to 2 seconds for the tid to be set.
-  ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
-
-  std::unique_ptr<Backtrace> all(Backtrace::Create(getpid(), thread_data.tid));
-  ASSERT_TRUE(all.get() != nullptr);
-  ASSERT_TRUE(all->Unwind(0));
-  VERIFY_NO_ERROR(all->GetError().error_code);
-
-  std::unique_ptr<Backtrace> ign1(Backtrace::Create(getpid(), thread_data.tid));
-  ASSERT_TRUE(ign1.get() != nullptr);
-  ASSERT_TRUE(ign1->Unwind(1));
-  VERIFY_NO_ERROR(ign1->GetError().error_code);
-
-  std::unique_ptr<Backtrace> ign2(Backtrace::Create(getpid(), thread_data.tid));
-  ASSERT_TRUE(ign2.get() != nullptr);
-  ASSERT_TRUE(ign2->Unwind(2));
-  VERIFY_NO_ERROR(ign2->GetError().error_code);
-
-  VerifyIgnoreFrames(all.get(), ign1.get(), ign2.get(), nullptr);
-
-  // Tell the thread to exit its infinite loop.
-  android_atomic_acquire_store(0, &thread_data.state);
-}
-
-static void* ThreadMaxRun(void* data) {
-  thread_t* thread = reinterpret_cast<thread_t*>(data);
-
-  thread->tid = android::base::GetThreadId();
-  EXPECT_NE(BacktraceTest::test_recursive_call_(MAX_BACKTRACE_FRAMES + 10, ThreadSetState, data),
-            0);
-  return nullptr;
-}
-
-TEST_F(BacktraceTest, thread_max_trace) {
-  pthread_attr_t attr;
-  pthread_attr_init(&attr);
-  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-
-  thread_t thread_data = { 0, 0, 0, nullptr };
-  pthread_t thread;
-  ASSERT_TRUE(pthread_create(&thread, &attr, ThreadMaxRun, &thread_data) == 0);
-
-  // Wait for the tid to be set.
-  ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
-
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), thread_data.tid));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  ASSERT_EQ(BACKTRACE_UNWIND_ERROR_EXCEED_MAX_FRAMES_LIMIT, backtrace->GetError().error_code);
-
-  VerifyMaxDump(backtrace.get());
-
-  // Tell the thread to exit its infinite loop.
-  android_atomic_acquire_store(0, &thread_data.state);
-}
-
-static void* ThreadDump(void* data) {
-  dump_thread_t* dump = reinterpret_cast<dump_thread_t*>(data);
-  while (true) {
-    if (android_atomic_acquire_load(dump->now)) {
-      break;
-    }
-  }
-
-  // The status of the actual unwind will be checked elsewhere.
-  dump->backtrace = Backtrace::Create(getpid(), dump->thread.tid, dump->map);
-  dump->backtrace->Unwind(0);
-
-  android_atomic_acquire_store(1, &dump->done);
-
-  return nullptr;
-}
-
-static void MultipleThreadDumpTest(bool share_map) {
-  // Dump NUM_THREADS simultaneously using the same map.
-  std::vector<thread_t> runners(NUM_THREADS);
-  std::vector<dump_thread_t> dumpers(NUM_THREADS);
-
-  pthread_attr_t attr;
-  pthread_attr_init(&attr);
-  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-  for (size_t i = 0; i < NUM_THREADS; i++) {
-    // Launch the runners, they will spin in hard loops doing nothing.
-    runners[i].tid = 0;
-    runners[i].state = 0;
-    ASSERT_TRUE(pthread_create(&runners[i].threadId, &attr, ThreadMaxRun, &runners[i]) == 0);
-  }
-
-  // Wait for tids to be set.
-  for (std::vector<thread_t>::iterator it = runners.begin(); it != runners.end(); ++it) {
-    ASSERT_TRUE(WaitForNonZero(&it->state, 30));
-  }
-
-  // Start all of the dumpers at once, they will spin until they are signalled
-  // to begin their dump run.
-  std::unique_ptr<BacktraceMap> map;
-  if (share_map) {
-    map.reset(BacktraceMap::Create(getpid()));
-  }
-  int32_t dump_now = 0;
-  for (size_t i = 0; i < NUM_THREADS; i++) {
-    dumpers[i].thread.tid = runners[i].tid;
-    dumpers[i].thread.state = 0;
-    dumpers[i].done = 0;
-    dumpers[i].now = &dump_now;
-    dumpers[i].map = map.get();
-
-    ASSERT_TRUE(pthread_create(&dumpers[i].thread.threadId, &attr, ThreadDump, &dumpers[i]) == 0);
-  }
-
-  // Start all of the dumpers going at once.
-  android_atomic_acquire_store(1, &dump_now);
-
-  for (size_t i = 0; i < NUM_THREADS; i++) {
-    ASSERT_TRUE(WaitForNonZero(&dumpers[i].done, 30));
-
-    // Tell the runner thread to exit its infinite loop.
-    android_atomic_acquire_store(0, &runners[i].state);
-
-    ASSERT_TRUE(dumpers[i].backtrace != nullptr);
-    VerifyMaxDump(dumpers[i].backtrace);
-
-    delete dumpers[i].backtrace;
-    dumpers[i].backtrace = nullptr;
-  }
-}
-
-TEST_F(BacktraceTest, thread_multiple_dump) {
-  MultipleThreadDumpTest(false);
-}
-
-TEST_F(BacktraceTest, thread_multiple_dump_same_map) {
-  MultipleThreadDumpTest(true);
-}
-
-// This test is for UnwindMaps that should share the same map cursor when
-// multiple maps are created for the current process at the same time.
-TEST_F(BacktraceTest, simultaneous_maps) {
-  BacktraceMap* map1 = BacktraceMap::Create(getpid());
-  BacktraceMap* map2 = BacktraceMap::Create(getpid());
-  BacktraceMap* map3 = BacktraceMap::Create(getpid());
-
-  Backtrace* back1 = Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD, map1);
-  ASSERT_TRUE(back1 != nullptr);
-  EXPECT_TRUE(back1->Unwind(0));
-  VERIFY_NO_ERROR(back1->GetError().error_code);
-  delete back1;
-  delete map1;
-
-  Backtrace* back2 = Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD, map2);
-  ASSERT_TRUE(back2 != nullptr);
-  EXPECT_TRUE(back2->Unwind(0));
-  VERIFY_NO_ERROR(back2->GetError().error_code);
-  delete back2;
-  delete map2;
-
-  Backtrace* back3 = Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD, map3);
-  ASSERT_TRUE(back3 != nullptr);
-  EXPECT_TRUE(back3->Unwind(0));
-  VERIFY_NO_ERROR(back3->GetError().error_code);
-  delete back3;
-  delete map3;
-}
-
-TEST_F(BacktraceTest, fillin_erases) {
-  BacktraceMap* back_map = BacktraceMap::Create(getpid());
-
-  backtrace_map_t map;
-
-  map.start = 1;
-  map.end = 3;
-  map.flags = 1;
-  map.name = "Initialized";
-  back_map->FillIn(0, &map);
-  delete back_map;
-
-  ASSERT_FALSE(BacktraceMap::IsValid(map));
-  ASSERT_EQ(static_cast<uint64_t>(0), map.start);
-  ASSERT_EQ(static_cast<uint64_t>(0), map.end);
-  ASSERT_EQ(0, map.flags);
-  ASSERT_EQ("", map.name);
-}
-
-TEST_F(BacktraceTest, format_test) {
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-
-  backtrace_frame_data_t frame;
-  frame.num = 1;
-  frame.pc = 2;
-  frame.rel_pc = 2;
-  frame.sp = 0;
-  frame.stack_size = 0;
-  frame.func_offset = 0;
-
-  // Check no map set.
-  frame.num = 1;
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 0000000000000002  <unknown>",
-#else
-  EXPECT_EQ("#01 pc 00000002  <unknown>",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check map name empty, but exists.
-  frame.pc = 0xb0020;
-  frame.rel_pc = 0x20;
-  frame.map.start = 0xb0000;
-  frame.map.end = 0xbffff;
-  frame.map.load_bias = 0;
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 0000000000000020  <anonymous:00000000000b0000>",
-#else
-  EXPECT_EQ("#01 pc 00000020  <anonymous:000b0000>",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check map name begins with a [.
-  frame.pc = 0xc0020;
-  frame.map.start = 0xc0000;
-  frame.map.end = 0xcffff;
-  frame.map.load_bias = 0;
-  frame.map.name = "[anon:thread signal stack]";
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 0000000000000020  [anon:thread signal stack:00000000000c0000]",
-#else
-  EXPECT_EQ("#01 pc 00000020  [anon:thread signal stack:000c0000]",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check relative pc is set and map name is set.
-  frame.pc = 0x12345679;
-  frame.rel_pc = 0x12345678;
-  frame.map.name = "MapFake";
-  frame.map.start =  1;
-  frame.map.end =  1;
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 0000000012345678  MapFake",
-#else
-  EXPECT_EQ("#01 pc 12345678  MapFake",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check func_name is set, but no func offset.
-  frame.func_name = "ProcFake";
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 0000000012345678  MapFake (ProcFake)",
-#else
-  EXPECT_EQ("#01 pc 12345678  MapFake (ProcFake)",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check func_name is set, and func offset is non-zero.
-  frame.func_offset = 645;
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 0000000012345678  MapFake (ProcFake+645)",
-#else
-  EXPECT_EQ("#01 pc 12345678  MapFake (ProcFake+645)",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check func_name is set, func offset is non-zero, and load_bias is non-zero.
-  frame.rel_pc = 0x123456dc;
-  frame.func_offset = 645;
-  frame.map.load_bias = 100;
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 00000000123456dc  MapFake (ProcFake+645)",
-#else
-  EXPECT_EQ("#01 pc 123456dc  MapFake (ProcFake+645)",
-#endif
-            backtrace->FormatFrameData(&frame));
-
-  // Check a non-zero map offset.
-  frame.map.offset = 0x1000;
-#if defined(__LP64__)
-  EXPECT_EQ("#01 pc 00000000123456dc  MapFake (offset 0x1000) (ProcFake+645)",
-#else
-  EXPECT_EQ("#01 pc 123456dc  MapFake (offset 0x1000) (ProcFake+645)",
-#endif
-            backtrace->FormatFrameData(&frame));
-}
-
-struct map_test_t {
-  uint64_t start;
-  uint64_t end;
-};
-
-static bool map_sort(map_test_t i, map_test_t j) { return i.start < j.start; }
-
-static std::string GetTestMapsAsString(const std::vector<map_test_t>& maps) {
-  if (maps.size() == 0) {
-    return "No test map entries\n";
-  }
-  std::string map_txt;
-  for (auto map : maps) {
-    map_txt += android::base::StringPrintf("%" PRIx64 "-%" PRIx64 "\n", map.start, map.end);
-  }
-  return map_txt;
-}
-
-static std::string GetMapsAsString(BacktraceMap* maps) {
-  if (maps->size() == 0) {
-    return "No map entries\n";
-  }
-  std::string map_txt;
-  for (const backtrace_map_t* map : *maps) {
-    map_txt += android::base::StringPrintf(
-        "%" PRIx64 "-%" PRIx64 " flags: 0x%x offset: 0x%" PRIx64 " load_bias: 0x%" PRIx64,
-        map->start, map->end, map->flags, map->offset, map->load_bias);
-    if (!map->name.empty()) {
-      map_txt += ' ' + map->name;
-    }
-    map_txt += '\n';
-  }
-  return map_txt;
-}
-
-static void VerifyMap(pid_t pid) {
-  char buffer[4096];
-  snprintf(buffer, sizeof(buffer), "/proc/%d/maps", pid);
-
-  FILE* map_file = fopen(buffer, "r");
-  ASSERT_TRUE(map_file != nullptr);
-  std::vector<map_test_t> test_maps;
-  while (fgets(buffer, sizeof(buffer), map_file)) {
-    map_test_t map;
-    ASSERT_EQ(2, sscanf(buffer, "%" SCNx64 "-%" SCNx64 " ", &map.start, &map.end));
-    test_maps.push_back(map);
-  }
-  fclose(map_file);
-  std::sort(test_maps.begin(), test_maps.end(), map_sort);
-
-  std::unique_ptr<BacktraceMap> map(BacktraceMap::Create(pid));
-
-  // Basic test that verifies that the map is in the expected order.
-  auto test_it = test_maps.begin();
-  for (auto it = map->begin(); it != map->end(); ++it) {
-    ASSERT_TRUE(test_it != test_maps.end()) << "Mismatch in number of maps, expected test maps:\n"
-                                            << GetTestMapsAsString(test_maps) << "Actual maps:\n"
-                                            << GetMapsAsString(map.get());
-    ASSERT_EQ(test_it->start, (*it)->start) << "Mismatch in map data, expected test maps:\n"
-                                            << GetTestMapsAsString(test_maps) << "Actual maps:\n"
-                                            << GetMapsAsString(map.get());
-    ASSERT_EQ(test_it->end, (*it)->end) << "Mismatch maps in map data, expected test maps:\n"
-                                        << GetTestMapsAsString(test_maps) << "Actual maps:\n"
-                                        << GetMapsAsString(map.get());
-    // Make sure the load bias get set to a value.
-    ASSERT_NE(static_cast<uint64_t>(-1), (*it)->load_bias) << "Found uninitialized load_bias\n"
-                                                           << GetMapsAsString(map.get());
-    ++test_it;
-  }
-  ASSERT_TRUE(test_it == test_maps.end());
-}
-
-TEST_F(BacktraceTest, verify_map_remote) {
-  pid_t pid;
-  CreateRemoteProcess(&pid);
-
-  // The maps should match exactly since the forked process has been paused.
-  VerifyMap(pid);
-
-  FinishRemoteProcess(pid);
-}
-
-static void InitMemory(uint8_t* memory, size_t bytes) {
-  for (size_t i = 0; i < bytes; i++) {
-    memory[i] = i;
-    if (memory[i] == '\0') {
-      // Don't use '\0' in our data so we can verify that an overread doesn't
-      // occur by using a '\0' as the character after the read data.
-      memory[i] = 23;
-    }
-  }
-}
-
-static void* ThreadReadTest(void* data) {
-  thread_t* thread_data = reinterpret_cast<thread_t*>(data);
-
-  thread_data->tid = android::base::GetThreadId();
-
-  // Create two map pages.
-  // Mark the second page as not-readable.
-  size_t pagesize = static_cast<size_t>(sysconf(_SC_PAGE_SIZE));
-  uint8_t* memory;
-  if (posix_memalign(reinterpret_cast<void**>(&memory), pagesize, 2 * pagesize) != 0) {
-    return reinterpret_cast<void*>(-1);
-  }
-
-  if (mprotect(&memory[pagesize], pagesize, PROT_NONE) != 0) {
-    return reinterpret_cast<void*>(-1);
-  }
-
-  // Set up a simple pattern in memory.
-  InitMemory(memory, pagesize);
-
-  thread_data->data = memory;
-
-  // Tell the caller it's okay to start reading memory.
-  android_atomic_acquire_store(1, &thread_data->state);
-
-  // Loop waiting for the caller to finish reading the memory.
-  while (thread_data->state) {
-  }
-
-  // Re-enable read-write on the page so that we don't crash if we try
-  // and access data on this page when freeing the memory.
-  if (mprotect(&memory[pagesize], pagesize, PROT_READ | PROT_WRITE) != 0) {
-    return reinterpret_cast<void*>(-1);
-  }
-  free(memory);
-
-  android_atomic_acquire_store(1, &thread_data->state);
-
-  return nullptr;
-}
-
-static void RunReadTest(Backtrace* backtrace, uint64_t read_addr) {
-  size_t pagesize = static_cast<size_t>(sysconf(_SC_PAGE_SIZE));
-
-  // Create a page of data to use to do quick compares.
-  uint8_t* expected = new uint8_t[pagesize];
-  InitMemory(expected, pagesize);
-
-  uint8_t* data = new uint8_t[2 * pagesize];
-  // Verify that we can only read one page worth of data.
-  size_t bytes_read = backtrace->Read(read_addr, data, 2 * pagesize);
-  ASSERT_EQ(pagesize, bytes_read);
-  ASSERT_TRUE(memcmp(data, expected, pagesize) == 0);
-
-  // Verify unaligned reads.
-  for (size_t i = 1; i < sizeof(word_t); i++) {
-    bytes_read = backtrace->Read(read_addr + i, data, 2 * sizeof(word_t));
-    ASSERT_EQ(2 * sizeof(word_t), bytes_read);
-    ASSERT_TRUE(memcmp(data, &expected[i], 2 * sizeof(word_t)) == 0)
-        << "Offset at " << i << " failed";
-  }
-
-  // Verify small unaligned reads.
-  for (size_t i = 1; i < sizeof(word_t); i++) {
-    for (size_t j = 1; j < sizeof(word_t); j++) {
-      // Set one byte past what we expect to read, to guarantee we don't overread.
-      data[j] = '\0';
-      bytes_read = backtrace->Read(read_addr + i, data, j);
-      ASSERT_EQ(j, bytes_read);
-      ASSERT_TRUE(memcmp(data, &expected[i], j) == 0)
-          << "Offset at " << i << " length " << j << " miscompared";
-      ASSERT_EQ('\0', data[j])
-          << "Offset at " << i << " length " << j << " wrote too much data";
-    }
-  }
-  delete[] data;
-  delete[] expected;
-}
-
-TEST_F(BacktraceTest, thread_read) {
-  pthread_attr_t attr;
-  pthread_attr_init(&attr);
-  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-  pthread_t thread;
-  thread_t thread_data = { 0, 0, 0, nullptr };
-  ASSERT_TRUE(pthread_create(&thread, &attr, ThreadReadTest, &thread_data) == 0);
-
-  ASSERT_TRUE(WaitForNonZero(&thread_data.state, 10));
-
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(getpid(), thread_data.tid));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-
-  RunReadTest(backtrace.get(), reinterpret_cast<uint64_t>(thread_data.data));
-
-  android_atomic_acquire_store(0, &thread_data.state);
-
-  ASSERT_TRUE(WaitForNonZero(&thread_data.state, 10));
-}
-
-// The code requires these variables are the same size.
-volatile uint64_t g_ready = 0;
-volatile uint64_t g_addr = 0;
-static_assert(sizeof(g_ready) == sizeof(g_addr), "g_ready/g_addr must be same size");
-
-static void ForkedReadTest() {
-  // Create two map pages.
-  size_t pagesize = static_cast<size_t>(sysconf(_SC_PAGE_SIZE));
-  uint8_t* memory;
-  if (posix_memalign(reinterpret_cast<void**>(&memory), pagesize, 2 * pagesize) != 0) {
-    perror("Failed to allocate memory\n");
-    exit(1);
-  }
-
-  // Mark the second page as not-readable.
-  if (mprotect(&memory[pagesize], pagesize, PROT_NONE) != 0) {
-    perror("Failed to mprotect memory\n");
-    exit(1);
-  }
-
-  // Set up a simple pattern in memory.
-  InitMemory(memory, pagesize);
-
-  g_addr = reinterpret_cast<uint64_t>(memory);
-  g_ready = 1;
-
-  while (1) {
-    usleep(US_PER_MSEC);
-  }
-}
-
-TEST_F(BacktraceTest, process_read) {
-  g_ready = 0;
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    ForkedReadTest();
-    exit(0);
-  }
-  ASSERT_NE(-1, pid);
-
-  bool test_executed = false;
-  uint64_t start = NanoTime();
-  while (1) {
-    if (ptrace(PTRACE_ATTACH, pid, 0, 0) == 0) {
-      WaitForStop(pid);
-
-      std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, pid));
-      ASSERT_TRUE(backtrace.get() != nullptr);
-
-      uint64_t read_addr;
-      size_t bytes_read = backtrace->Read(reinterpret_cast<uint64_t>(&g_ready),
-                                          reinterpret_cast<uint8_t*>(&read_addr), sizeof(g_ready));
-      ASSERT_EQ(sizeof(g_ready), bytes_read);
-      if (read_addr) {
-        // The forked process is ready to be read.
-        bytes_read = backtrace->Read(reinterpret_cast<uint64_t>(&g_addr),
-                                     reinterpret_cast<uint8_t*>(&read_addr), sizeof(g_addr));
-        ASSERT_EQ(sizeof(g_addr), bytes_read);
-
-        RunReadTest(backtrace.get(), read_addr);
-
-        test_executed = true;
-        break;
-      }
-      ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
-    }
-    if ((NanoTime() - start) > 5 * NS_PER_SEC) {
-      break;
-    }
-    usleep(US_PER_MSEC);
-  }
-  kill(pid, SIGKILL);
-  ASSERT_EQ(waitpid(pid, nullptr, 0), pid);
-
-  ASSERT_TRUE(test_executed);
-}
-
-static void VerifyFunctionsFound(const std::vector<std::string>& found_functions) {
-  // We expect to find these functions in libbacktrace_test. If we don't
-  // find them, that's a bug in the memory read handling code in libunwind.
-  std::list<std::string> expected_functions;
-  expected_functions.push_back("test_recursive_call");
-  expected_functions.push_back("test_level_one");
-  expected_functions.push_back("test_level_two");
-  expected_functions.push_back("test_level_three");
-  expected_functions.push_back("test_level_four");
-  for (const auto& found_function : found_functions) {
-    for (const auto& expected_function : expected_functions) {
-      if (found_function == expected_function) {
-        expected_functions.remove(found_function);
-        break;
-      }
-    }
-  }
-  ASSERT_TRUE(expected_functions.empty()) << "Not all functions found in shared library.";
-}
-
-static void CopySharedLibrary(const char* tmp_dir, std::string* tmp_so_name) {
-  std::string test_lib(testing::internal::GetArgvs()[0]);
-  auto const value = test_lib.find_last_of('/');
-  if (value == std::string::npos) {
-    test_lib = "./";
-  } else {
-    test_lib = test_lib.substr(0, value + 1) + "./";
-  }
-  test_lib += "libbacktrace_test.so";
-
-  *tmp_so_name = std::string(tmp_dir) + "/libbacktrace_test.so";
-  std::string cp_cmd = android::base::StringPrintf("cp %s %s", test_lib.c_str(), tmp_dir);
-
-  // Copy the shared so to a tempory directory.
-  ASSERT_EQ(0, system(cp_cmd.c_str()));
-}
-
-TEST_F(BacktraceTest, check_unreadable_elf_local) {
-  TemporaryDir td;
-  std::string tmp_so_name;
-  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
-
-  struct stat buf;
-  ASSERT_TRUE(stat(tmp_so_name.c_str(), &buf) != -1);
-  uint64_t map_size = buf.st_size;
-
-  int fd = open(tmp_so_name.c_str(), O_RDONLY);
-  ASSERT_TRUE(fd != -1);
-
-  void* map = mmap(nullptr, map_size, PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0);
-  ASSERT_TRUE(map != MAP_FAILED);
-  close(fd);
-  ASSERT_TRUE(unlink(tmp_so_name.c_str()) != -1);
-
-  std::vector<std::string> found_functions;
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(BACKTRACE_CURRENT_PROCESS,
-                                                         BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-
-  // Needed before GetFunctionName will work.
-  backtrace->Unwind(0);
-
-  // Loop through the entire map, and get every function we can find.
-  map_size += reinterpret_cast<uint64_t>(map);
-  std::string last_func;
-  for (uint64_t read_addr = reinterpret_cast<uint64_t>(map); read_addr < map_size; read_addr += 4) {
-    uint64_t offset;
-    std::string func_name = backtrace->GetFunctionName(read_addr, &offset);
-    if (!func_name.empty() && last_func != func_name) {
-      found_functions.push_back(func_name);
-    }
-    last_func = func_name;
-  }
-
-  ASSERT_TRUE(munmap(map, map_size - reinterpret_cast<uint64_t>(map)) == 0);
-
-  VerifyFunctionsFound(found_functions);
-}
-
-TEST_F(BacktraceTest, check_unreadable_elf_remote) {
-  TemporaryDir td;
-  std::string tmp_so_name;
-  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
-
-  g_ready = 0;
-
-  struct stat buf;
-  ASSERT_TRUE(stat(tmp_so_name.c_str(), &buf) != -1);
-  uint64_t map_size = buf.st_size;
-
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    int fd = open(tmp_so_name.c_str(), O_RDONLY);
-    if (fd == -1) {
-      fprintf(stderr, "Failed to open file %s: %s\n", tmp_so_name.c_str(), strerror(errno));
-      unlink(tmp_so_name.c_str());
-      exit(0);
-    }
-
-    void* map = mmap(nullptr, map_size, PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0);
-    if (map == MAP_FAILED) {
-      fprintf(stderr, "Failed to map in memory: %s\n", strerror(errno));
-      unlink(tmp_so_name.c_str());
-      exit(0);
-    }
-    close(fd);
-    if (unlink(tmp_so_name.c_str()) == -1) {
-      fprintf(stderr, "Failed to unlink: %s\n", strerror(errno));
-      exit(0);
-    }
-
-    g_addr = reinterpret_cast<uint64_t>(map);
-    g_ready = 1;
-    while (true) {
-      usleep(US_PER_MSEC);
-    }
-    exit(0);
-  }
-  ASSERT_TRUE(pid > 0);
-
-  std::vector<std::string> found_functions;
-  uint64_t start = NanoTime();
-  while (true) {
-    ASSERT_TRUE(ptrace(PTRACE_ATTACH, pid, 0, 0) == 0);
-
-    // Wait for the process to get to a stopping point.
-    WaitForStop(pid);
-
-    std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, BACKTRACE_CURRENT_THREAD));
-    ASSERT_TRUE(backtrace.get() != nullptr);
-
-    uint64_t read_addr;
-    ASSERT_EQ(sizeof(g_ready),
-              backtrace->Read(reinterpret_cast<uint64_t>(&g_ready),
-                              reinterpret_cast<uint8_t*>(&read_addr), sizeof(g_ready)));
-    if (read_addr) {
-      ASSERT_EQ(sizeof(g_addr),
-                backtrace->Read(reinterpret_cast<uint64_t>(&g_addr),
-                                reinterpret_cast<uint8_t*>(&read_addr), sizeof(uint64_t)));
-
-      // Needed before GetFunctionName will work.
-      backtrace->Unwind(0);
-
-      // Loop through the entire map, and get every function we can find.
-      map_size += read_addr;
-      std::string last_func;
-      for (; read_addr < map_size; read_addr += 4) {
-        uint64_t offset;
-        std::string func_name = backtrace->GetFunctionName(read_addr, &offset);
-        if (!func_name.empty() && last_func != func_name) {
-          found_functions.push_back(func_name);
-        }
-        last_func = func_name;
-      }
-      break;
-    }
-    ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
-
-    if ((NanoTime() - start) > 5 * NS_PER_SEC) {
-      break;
-    }
-    usleep(US_PER_MSEC);
-  }
-
-  kill(pid, SIGKILL);
-  ASSERT_EQ(waitpid(pid, nullptr, 0), pid);
-
-  VerifyFunctionsFound(found_functions);
-}
-
-static bool FindFuncFrameInBacktrace(Backtrace* backtrace, uint64_t test_func, size_t* frame_num) {
-  backtrace_map_t map;
-  backtrace->FillInMap(test_func, &map);
-  if (!BacktraceMap::IsValid(map)) {
-    return false;
-  }
-
-  // Loop through the frames, and find the one that is in the map.
-  *frame_num = 0;
-  for (Backtrace::const_iterator it = backtrace->begin(); it != backtrace->end(); ++it) {
-    if (BacktraceMap::IsValid(it->map) && map.start == it->map.start &&
-        it->pc >= test_func) {
-      *frame_num = it->num;
-      return true;
-    }
-  }
-  return false;
-}
-
-static void VerifyUnreadableElfFrame(Backtrace* backtrace, uint64_t test_func, size_t frame_num) {
-  ASSERT_LT(backtrace->NumFrames(), static_cast<size_t>(MAX_BACKTRACE_FRAMES))
-    << DumpFrames(backtrace);
-
-  ASSERT_TRUE(frame_num != 0) << DumpFrames(backtrace);
-  // Make sure that there is at least one more frame above the test func call.
-  ASSERT_LT(frame_num, backtrace->NumFrames()) << DumpFrames(backtrace);
-
-  uint64_t diff = backtrace->GetFrame(frame_num)->pc - test_func;
-  ASSERT_LT(diff, 200U) << DumpFrames(backtrace);
-}
-
-static void VerifyUnreadableElfBacktrace(void* func) {
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(BACKTRACE_CURRENT_PROCESS,
-                                                         BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_TRUE(backtrace->Unwind(0));
-  VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-  size_t frame_num;
-  uint64_t test_func = reinterpret_cast<uint64_t>(func);
-  ASSERT_TRUE(FindFuncFrameInBacktrace(backtrace.get(), test_func, &frame_num))
-      << DumpFrames(backtrace.get());
-
-  VerifyUnreadableElfFrame(backtrace.get(), test_func, frame_num);
-}
-
-typedef int (*test_func_t)(int, int, int, int, void (*)(void*), void*);
-
-TEST_F(BacktraceTest, unwind_through_unreadable_elf_local) {
-#if defined(__arm__)
-  // The exidx information does not include unwind information for the test
-  // library. The debug_frame is not findable because the symbol table
-  // that includes the ".debug_frame" name is also not in memory.
-  // So skip this test for arm.
-  GTEST_SKIP() << "Arm library does not contain unwind information in memory.";
-#endif
-
-  TemporaryDir td;
-  std::string tmp_so_name;
-  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
-
-  void* lib_handle = dlopen(tmp_so_name.c_str(), RTLD_NOW);
-  ASSERT_TRUE(lib_handle != nullptr);
-  ASSERT_TRUE(unlink(tmp_so_name.c_str()) != -1);
-
-  test_func_t test_func;
-  test_func = reinterpret_cast<test_func_t>(dlsym(lib_handle, "test_level_one"));
-  ASSERT_TRUE(test_func != nullptr);
-
-  ASSERT_NE(test_func(1, 2, 3, 4, VerifyUnreadableElfBacktrace, reinterpret_cast<void*>(test_func)),
-            0);
-}
-
-TEST_F(BacktraceTest, unwind_through_unreadable_elf_remote) {
-#if defined(__arm__)
-  // The exidx information does not include unwind information for the test
-  // library. The debug_frame is not findable because the symbol table
-  // that includes the ".debug_frame" name is also not in memory.
-  // So skip this test for arm.
-  GTEST_SKIP() << "Arm library does not contain unwind information in memory.";
-#endif
-
-  TemporaryDir td;
-  std::string tmp_so_name;
-  ASSERT_NO_FATAL_FAILURE(CopySharedLibrary(td.path, &tmp_so_name));
-
-  void* lib_handle = dlopen(tmp_so_name.c_str(), RTLD_NOW);
-  ASSERT_TRUE(lib_handle != nullptr);
-  ASSERT_TRUE(unlink(tmp_so_name.c_str()) != -1);
-
-  test_func_t test_func;
-  test_func = reinterpret_cast<test_func_t>(dlsym(lib_handle, "test_level_one"));
-  ASSERT_TRUE(test_func != nullptr);
-
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    test_func(1, 2, 3, 4, 0, 0);
-    exit(0);
-  }
-  ASSERT_TRUE(pid > 0);
-
-  uint64_t start = NanoTime();
-  bool done = false;
-  while (!done) {
-    ASSERT_TRUE(ptrace(PTRACE_ATTACH, pid, 0, 0) == 0);
-
-    // Wait for the process to get to a stopping point.
-    WaitForStop(pid);
-
-    std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, BACKTRACE_CURRENT_THREAD));
-    ASSERT_TRUE(backtrace.get() != nullptr);
-    ASSERT_TRUE(backtrace->Unwind(0));
-    VERIFY_NO_ERROR(backtrace->GetError().error_code);
-
-    size_t frame_num;
-    if (FindFuncFrameInBacktrace(backtrace.get(), reinterpret_cast<uint64_t>(test_func),
-                                 &frame_num) &&
-        frame_num != 0) {
-      VerifyUnreadableElfFrame(backtrace.get(), reinterpret_cast<uint64_t>(test_func), frame_num);
-      done = true;
-    }
-
-    ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
-
-    if ((NanoTime() - start) > 5 * NS_PER_SEC) {
-      break;
-    }
-    usleep(US_PER_MSEC);
-  }
-
-  kill(pid, SIGKILL);
-  ASSERT_EQ(waitpid(pid, nullptr, 0), pid);
-
-  ASSERT_TRUE(done) << "Test function never found in unwind.";
-}
-
-TEST_F(BacktraceTest, unwind_thread_doesnt_exist) {
-  std::unique_ptr<Backtrace> backtrace(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, 99999999));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-  ASSERT_FALSE(backtrace->Unwind(0));
-  ASSERT_EQ(BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST, backtrace->GetError().error_code);
-}
-
-TEST_F(BacktraceTest, local_get_function_name_before_unwind) {
-  std::unique_ptr<Backtrace> backtrace(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace.get() != nullptr);
-
-  // Verify that trying to get a function name before doing an unwind works.
-  uint64_t cur_func_offset = reinterpret_cast<uint64_t>(test_level_one_) + 1;
-  uint64_t offset;
-  ASSERT_NE(std::string(""), backtrace->GetFunctionName(cur_func_offset, &offset));
-}
-
-TEST_F(BacktraceTest, remote_get_function_name_before_unwind) {
-  pid_t pid;
-  CreateRemoteProcess(&pid);
-
-  // Now create an unwind object.
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, pid));
-
-  // Verify that trying to get a function name before doing an unwind works.
-  uint64_t cur_func_offset = reinterpret_cast<uint64_t>(test_level_one_) + 1;
-  uint64_t offset;
-  ASSERT_NE(std::string(""), backtrace->GetFunctionName(cur_func_offset, &offset));
-
-  FinishRemoteProcess(pid);
-}
-
-static void SetUcontextSp(uint64_t sp, ucontext_t* ucontext) {
-#if defined(__arm__)
-  ucontext->uc_mcontext.arm_sp = sp;
-#elif defined(__aarch64__)
-  ucontext->uc_mcontext.sp = sp;
-#elif defined(__i386__)
-  ucontext->uc_mcontext.gregs[REG_ESP] = sp;
-#elif defined(__x86_64__)
-  ucontext->uc_mcontext.gregs[REG_RSP] = sp;
-#else
-  UNUSED(sp);
-  UNUSED(ucontext);
-  ASSERT_TRUE(false) << "Unsupported architecture";
-#endif
-}
-
-static void SetUcontextPc(uint64_t pc, ucontext_t* ucontext) {
-#if defined(__arm__)
-  ucontext->uc_mcontext.arm_pc = pc;
-#elif defined(__aarch64__)
-  ucontext->uc_mcontext.pc = pc;
-#elif defined(__i386__)
-  ucontext->uc_mcontext.gregs[REG_EIP] = pc;
-#elif defined(__x86_64__)
-  ucontext->uc_mcontext.gregs[REG_RIP] = pc;
-#else
-  UNUSED(pc);
-  UNUSED(ucontext);
-  ASSERT_TRUE(false) << "Unsupported architecture";
-#endif
-}
-
-static void SetUcontextLr(uint64_t lr, ucontext_t* ucontext) {
-#if defined(__arm__)
-  ucontext->uc_mcontext.arm_lr = lr;
-#elif defined(__aarch64__)
-  ucontext->uc_mcontext.regs[30] = lr;
-#elif defined(__i386__)
-  // The lr is on the stack.
-  ASSERT_TRUE(lr != 0);
-  ASSERT_TRUE(ucontext != nullptr);
-#elif defined(__x86_64__)
-  // The lr is on the stack.
-  ASSERT_TRUE(lr != 0);
-  ASSERT_TRUE(ucontext != nullptr);
-#else
-  UNUSED(lr);
-  UNUSED(ucontext);
-  ASSERT_TRUE(false) << "Unsupported architecture";
-#endif
-}
-
-static constexpr size_t DEVICE_MAP_SIZE = 1024;
-
-static void SetupDeviceMap(void** device_map) {
-  // Make sure that anything in a device map will result in fails
-  // to read.
-  android::base::unique_fd device_fd(open("/dev/zero", O_RDONLY | O_CLOEXEC));
-
-  *device_map = mmap(nullptr, 1024, PROT_READ, MAP_PRIVATE, device_fd, 0);
-  ASSERT_TRUE(*device_map != MAP_FAILED);
-
-  // Make sure the map is readable.
-  ASSERT_EQ(0, reinterpret_cast<int*>(*device_map)[0]);
-}
-
-static void UnwindFromDevice(Backtrace* backtrace, void* device_map) {
-  uint64_t device_map_uint = reinterpret_cast<uint64_t>(device_map);
-
-  backtrace_map_t map;
-  backtrace->FillInMap(device_map_uint, &map);
-  // Verify the flag is set.
-  ASSERT_EQ(PROT_DEVICE_MAP, map.flags & PROT_DEVICE_MAP);
-
-  // Quick basic checks of functionality.
-  uint64_t offset;
-  ASSERT_EQ(std::string(""), backtrace->GetFunctionName(device_map_uint, &offset));
-  ASSERT_EQ(std::string(""), backtrace->GetFunctionName(device_map_uint, &offset, &map));
-  ASSERT_EQ(std::string(""), backtrace->GetFunctionName(0, &offset));
-
-  uint64_t cur_func_offset = reinterpret_cast<uint64_t>(BacktraceTest::test_level_one_) + 1;
-  // Now verify the device map flag actually causes the function name to be empty.
-  backtrace->FillInMap(cur_func_offset, &map);
-  ASSERT_TRUE((map.flags & PROT_DEVICE_MAP) == 0);
-  ASSERT_NE(std::string(""), backtrace->GetFunctionName(cur_func_offset, &offset, &map));
-  map.flags |= PROT_DEVICE_MAP;
-  ASSERT_EQ(std::string(""), backtrace->GetFunctionName(cur_func_offset, &offset, &map));
-
-  ucontext_t ucontext;
-
-  // Create a context that has the pc in the device map, but the sp
-  // in a non-device map.
-  memset(&ucontext, 0, sizeof(ucontext));
-  SetUcontextSp(reinterpret_cast<uint64_t>(&ucontext), &ucontext);
-  SetUcontextPc(device_map_uint, &ucontext);
-  SetUcontextLr(cur_func_offset, &ucontext);
-
-  ASSERT_TRUE(backtrace->Unwind(0, &ucontext));
-
-  // The buffer should only be a single element.
-  ASSERT_EQ(1U, backtrace->NumFrames());
-  const backtrace_frame_data_t* frame = backtrace->GetFrame(0);
-  ASSERT_EQ(device_map_uint, frame->pc);
-  ASSERT_EQ(reinterpret_cast<uint64_t>(&ucontext), frame->sp);
-
-  // Check what happens when skipping the first frame.
-  ASSERT_TRUE(backtrace->Unwind(1, &ucontext));
-  ASSERT_EQ(0U, backtrace->NumFrames());
-
-  // Create a context that has the sp in the device map, but the pc
-  // in a non-device map.
-  memset(&ucontext, 0, sizeof(ucontext));
-  SetUcontextSp(device_map_uint, &ucontext);
-  SetUcontextPc(cur_func_offset, &ucontext);
-  SetUcontextLr(cur_func_offset, &ucontext);
-
-  ASSERT_TRUE(backtrace->Unwind(0, &ucontext));
-
-  // The buffer should only be a single element.
-  ASSERT_EQ(1U, backtrace->NumFrames());
-  frame = backtrace->GetFrame(0);
-  ASSERT_EQ(cur_func_offset, frame->pc);
-  ASSERT_EQ(device_map_uint, frame->sp);
-
-  // Check what happens when skipping the first frame.
-  ASSERT_TRUE(backtrace->Unwind(1, &ucontext));
-  ASSERT_EQ(0U, backtrace->NumFrames());
-}
-
-TEST_F(BacktraceTest, unwind_disallow_device_map_local) {
-  void* device_map;
-  SetupDeviceMap(&device_map);
-
-  // Now create an unwind object.
-  std::unique_ptr<Backtrace> backtrace(
-      Backtrace::Create(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD));
-  ASSERT_TRUE(backtrace);
-
-  UnwindFromDevice(backtrace.get(), device_map);
-
-  munmap(device_map, DEVICE_MAP_SIZE);
-}
-
-TEST_F(BacktraceTest, unwind_disallow_device_map_remote) {
-  void* device_map;
-  SetupDeviceMap(&device_map);
-
-  // Fork a process to do a remote backtrace.
-  pid_t pid;
-  CreateRemoteProcess(&pid);
-
-  // Now create an unwind object.
-  std::unique_ptr<Backtrace> backtrace(Backtrace::Create(pid, pid));
-
-  UnwindFromDevice(backtrace.get(), device_map);
-
-  FinishRemoteProcess(pid);
-
-  munmap(device_map, DEVICE_MAP_SIZE);
-}
-
-class ScopedSignalHandler {
- public:
-  ScopedSignalHandler(int signal_number, void (*handler)(int)) : signal_number_(signal_number) {
-    memset(&action_, 0, sizeof(action_));
-    action_.sa_handler = handler;
-    sigaction(signal_number_, &action_, &old_action_);
-  }
-
-  ScopedSignalHandler(int signal_number, void (*action)(int, siginfo_t*, void*))
-      : signal_number_(signal_number) {
-    memset(&action_, 0, sizeof(action_));
-    action_.sa_flags = SA_SIGINFO;
-    action_.sa_sigaction = action;
-    sigaction(signal_number_, &action_, &old_action_);
-  }
-
-  ~ScopedSignalHandler() { sigaction(signal_number_, &old_action_, nullptr); }
-
- private:
-  struct sigaction action_;
-  struct sigaction old_action_;
-  const int signal_number_;
-};
-
-static void SetValueAndLoop(void* data) {
-  volatile int* value = reinterpret_cast<volatile int*>(data);
-
-  *value = 1;
-  for (volatile int i = 0;; i++)
-    ;
-}
-
-static void UnwindThroughSignal(bool use_action, create_func_t create_func,
-                                map_create_func_t map_create_func) {
-  volatile int value = 0;
-  pid_t pid;
-  if ((pid = fork()) == 0) {
-    if (use_action) {
-      ScopedSignalHandler ssh(SIGUSR1, BacktraceTest::test_signal_action_);
-
-      BacktraceTest::test_level_one_(1, 2, 3, 4, SetValueAndLoop, const_cast<int*>(&value));
-    } else {
-      ScopedSignalHandler ssh(SIGUSR1, BacktraceTest::test_signal_handler_);
-
-      BacktraceTest::test_level_one_(1, 2, 3, 4, SetValueAndLoop, const_cast<int*>(&value));
-    }
-  }
-  ASSERT_NE(-1, pid);
-
-  int read_value = 0;
-  uint64_t start = NanoTime();
-  while (read_value == 0) {
-    usleep(1000);
-
-    // Loop until the remote function gets into the final function.
-    ASSERT_TRUE(ptrace(PTRACE_ATTACH, pid, 0, 0) == 0);
-
-    WaitForStop(pid);
-
-    std::unique_ptr<BacktraceMap> map(map_create_func(pid, false));
-    std::unique_ptr<Backtrace> backtrace(create_func(pid, pid, map.get()));
-
-    size_t bytes_read = backtrace->Read(reinterpret_cast<uint64_t>(const_cast<int*>(&value)),
-                                        reinterpret_cast<uint8_t*>(&read_value), sizeof(read_value));
-    ASSERT_EQ(sizeof(read_value), bytes_read);
-
-    ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
-
-    ASSERT_TRUE(NanoTime() - start < 5 * NS_PER_SEC)
-        << "Remote process did not execute far enough in 5 seconds.";
-  }
-
-  // Now need to send a signal to the remote process.
-  kill(pid, SIGUSR1);
-
-  // Wait for the process to get to the signal handler loop.
-  Backtrace::const_iterator frame_iter;
-  start = NanoTime();
-  std::unique_ptr<BacktraceMap> map;
-  std::unique_ptr<Backtrace> backtrace;
-  while (true) {
-    usleep(1000);
-
-    ASSERT_TRUE(ptrace(PTRACE_ATTACH, pid, 0, 0) == 0);
-
-    WaitForStop(pid);
-
-    map.reset(map_create_func(pid, false));
-    ASSERT_TRUE(map.get() != nullptr);
-    backtrace.reset(create_func(pid, pid, map.get()));
-    ASSERT_TRUE(backtrace->Unwind(0));
-    bool found = false;
-    for (frame_iter = backtrace->begin(); frame_iter != backtrace->end(); ++frame_iter) {
-      if (frame_iter->func_name == "test_loop_forever") {
-        ++frame_iter;
-        found = true;
-        break;
-      }
-    }
-    if (found) {
-      break;
-    }
-
-    ASSERT_TRUE(ptrace(PTRACE_DETACH, pid, 0, 0) == 0);
-
-    ASSERT_TRUE(NanoTime() - start < 5 * NS_PER_SEC)
-        << "Remote process did not get in signal handler in 5 seconds." << std::endl
-        << DumpFrames(backtrace.get());
-  }
-
-  std::vector<std::string> names;
-  // Loop through the frames, and save the function names.
-  size_t frame = 0;
-  for (; frame_iter != backtrace->end(); ++frame_iter) {
-    if (frame_iter->func_name == "test_level_four") {
-      frame = names.size() + 1;
-    }
-    names.push_back(frame_iter->func_name);
-  }
-  ASSERT_NE(0U, frame) << "Unable to find test_level_four in backtrace" << std::endl
-                       << DumpFrames(backtrace.get());
-
-  // The expected order of the frames:
-  //   test_loop_forever
-  //   test_signal_handler|test_signal_action
-  //   <OPTIONAL_FRAME> May or may not exist.
-  //   SetValueAndLoop (but the function name might be empty)
-  //   test_level_four
-  //   test_level_three
-  //   test_level_two
-  //   test_level_one
-  ASSERT_LE(frame + 2, names.size()) << DumpFrames(backtrace.get());
-  ASSERT_LE(2U, frame) << DumpFrames(backtrace.get());
-  if (use_action) {
-    ASSERT_EQ("test_signal_action", names[0]) << DumpFrames(backtrace.get());
-  } else {
-    ASSERT_EQ("test_signal_handler", names[0]) << DumpFrames(backtrace.get());
-  }
-  ASSERT_EQ("test_level_three", names[frame]) << DumpFrames(backtrace.get());
-  ASSERT_EQ("test_level_two", names[frame + 1]) << DumpFrames(backtrace.get());
-  ASSERT_EQ("test_level_one", names[frame + 2]) << DumpFrames(backtrace.get());
-
-  FinishRemoteProcess(pid);
-}
-
-TEST_F(BacktraceTest, unwind_remote_through_signal_using_handler) {
-  UnwindThroughSignal(false, Backtrace::Create, BacktraceMap::Create);
-}
-
-TEST_F(BacktraceTest, unwind_remote_through_signal_using_action) {
-  UnwindThroughSignal(true, Backtrace::Create, BacktraceMap::Create);
-}
-
-static void TestFrameSkipNumbering(create_func_t create_func, map_create_func_t map_create_func) {
-  std::unique_ptr<BacktraceMap> map(map_create_func(getpid(), false));
-  std::unique_ptr<Backtrace> backtrace(
-      create_func(getpid(), android::base::GetThreadId(), map.get()));
-  backtrace->Unwind(1);
-  ASSERT_NE(0U, backtrace->NumFrames());
-  ASSERT_EQ(0U, backtrace->GetFrame(0)->num);
-}
-
-TEST_F(BacktraceTest, unwind_frame_skip_numbering) {
-  TestFrameSkipNumbering(Backtrace::Create, BacktraceMap::Create);
-}
-
-#define MAX_LEAK_BYTES (32*1024UL)
-
-static void CheckForLeak(pid_t pid, pid_t tid) {
-  std::unique_ptr<BacktraceMap> map(BacktraceMap::Create(pid));
-
-  // Loop enough that even a small leak should be detectable.
-  size_t first_allocated_bytes = 0;
-  size_t last_allocated_bytes = 0;
-  for (size_t i = 0; i < 4096; i++) {
-    Backtrace* backtrace = Backtrace::Create(pid, tid, map.get());
-    ASSERT_TRUE(backtrace != nullptr);
-    ASSERT_TRUE(backtrace->Unwind(0));
-    VERIFY_NO_ERROR(backtrace->GetError().error_code);
-    delete backtrace;
-
-    size_t allocated_bytes = mallinfo().uordblks;
-    if (first_allocated_bytes == 0) {
-      first_allocated_bytes = allocated_bytes;
-    } else if (last_allocated_bytes > first_allocated_bytes) {
-      // Check that the memory did not increase too much over the first loop.
-      ASSERT_LE(last_allocated_bytes - first_allocated_bytes, MAX_LEAK_BYTES);
-    }
-    last_allocated_bytes = allocated_bytes;
-  }
-}
-
-TEST_F(BacktraceTest, check_for_leak_local) {
-  CheckForLeak(BACKTRACE_CURRENT_PROCESS, BACKTRACE_CURRENT_THREAD);
-}
-
-TEST_F(BacktraceTest, check_for_leak_local_thread) {
-  thread_t thread_data = { 0, 0, 0, nullptr };
-  pthread_t thread;
-  ASSERT_TRUE(pthread_create(&thread, nullptr, ThreadLevelRun, &thread_data) == 0);
-
-  // Wait up to 2 seconds for the tid to be set.
-  ASSERT_TRUE(WaitForNonZero(&thread_data.state, 2));
-
-  CheckForLeak(BACKTRACE_CURRENT_PROCESS, thread_data.tid);
-
-  // Tell the thread to exit its infinite loop.
-  android_atomic_acquire_store(0, &thread_data.state);
-
-  ASSERT_TRUE(pthread_join(thread, nullptr) == 0);
-}
-
-TEST_F(BacktraceTest, check_for_leak_remote) {
-  pid_t pid;
-  CreateRemoteProcess(&pid);
-
-  CheckForLeak(pid, BACKTRACE_CURRENT_THREAD);
-
-  FinishRemoteProcess(pid);
-}
diff --git a/libbacktrace/backtrace_testlib.cpp b/libbacktrace/backtrace_testlib.cpp
deleted file mode 100644
index fec7d98..0000000
--- a/libbacktrace/backtrace_testlib.cpp
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 <signal.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <memory>
-#include <vector>
-
-#include <unwindstack/Regs.h>
-#include <unwindstack/RegsGetLocal.h>
-
-#include "backtrace_testlib.h"
-
-void test_loop_forever() {
-  while (1)
-    ;
-}
-
-void test_signal_handler(int) { test_loop_forever(); }
-
-void test_signal_action(int, siginfo_t*, void*) { test_loop_forever(); }
-
-int test_level_four(int one, int two, int three, int four, void (*callback_func)(void*),
-                    void* data) {
-  if (callback_func != NULL) {
-    callback_func(data);
-  } else {
-    while (1)
-      ;
-  }
-  return one + two + three + four;
-}
-
-int test_level_three(int one, int two, int three, int four, void (*callback_func)(void*),
-                     void* data) {
-  return test_level_four(one + 3, two + 6, three + 9, four + 12, callback_func, data) + 3;
-}
-
-int test_level_two(int one, int two, int three, int four, void (*callback_func)(void*), void* data) {
-  return test_level_three(one + 2, two + 4, three + 6, four + 8, callback_func, data) + 2;
-}
-
-int test_level_one(int one, int two, int three, int four, void (*callback_func)(void*), void* data) {
-  return test_level_two(one + 1, two + 2, three + 3, four + 4, callback_func, data) + 1;
-}
-
-int test_recursive_call(int level, void (*callback_func)(void*), void* data) {
-  if (level > 0) {
-    return test_recursive_call(level - 1, callback_func, data) + level;
-  } else if (callback_func != NULL) {
-    callback_func(data);
-  } else {
-    while (1) {
-    }
-  }
-  return 0;
-}
-
-typedef struct {
-  std::vector<uint8_t>* ucontext;
-  volatile int* exit_flag;
-} GetContextArg;
-
-static void GetContextAndExit(void* data) {
-  GetContextArg* arg = reinterpret_cast<GetContextArg*>(data);
-
-  std::unique_ptr<unwindstack::Regs> regs(unwindstack::Regs::CreateFromLocal());
-  unwindstack::RegsGetLocal(regs.get());
-
-  ucontext_t ucontext;
-  memset(&ucontext, 0, sizeof(ucontext));
-#if defined(__arm__)
-  memcpy(&ucontext.uc_mcontext, regs->RawData(), sizeof(uint32_t) * 16);
-#elif defined(__aarch64__)
-  memcpy(&ucontext.uc_mcontext, regs->RawData(), sizeof(uint64_t) * 33);
-#elif defined(__i386__)
-  uint32_t* reg_data = reinterpret_cast<uint32_t*>(regs->RawData());
-  ucontext.uc_mcontext.gregs[0] = reg_data[15];
-  ucontext.uc_mcontext.gregs[1] = reg_data[14];
-  ucontext.uc_mcontext.gregs[2] = reg_data[13];
-  ucontext.uc_mcontext.gregs[3] = reg_data[12];
-  ucontext.uc_mcontext.gregs[4] = reg_data[7];
-  ucontext.uc_mcontext.gregs[5] = reg_data[6];
-  ucontext.uc_mcontext.gregs[6] = reg_data[5];
-  ucontext.uc_mcontext.gregs[7] = reg_data[4];
-  ucontext.uc_mcontext.gregs[8] = reg_data[3];
-  ucontext.uc_mcontext.gregs[9] = reg_data[2];
-  ucontext.uc_mcontext.gregs[10] = reg_data[1];
-  ucontext.uc_mcontext.gregs[11] = reg_data[0];
-  ucontext.uc_mcontext.gregs[14] = reg_data[8];
-  ucontext.uc_mcontext.gregs[15] = reg_data[10];
-#elif defined(__x86_64__)
-  uint64_t* reg_data = reinterpret_cast<uint64_t*>(regs->RawData());
-  ucontext.uc_mcontext.gregs[0] = reg_data[8];
-  ucontext.uc_mcontext.gregs[1] = reg_data[9];
-  ucontext.uc_mcontext.gregs[2] = reg_data[10];
-  ucontext.uc_mcontext.gregs[3] = reg_data[11];
-  ucontext.uc_mcontext.gregs[4] = reg_data[12];
-  ucontext.uc_mcontext.gregs[5] = reg_data[13];
-  ucontext.uc_mcontext.gregs[6] = reg_data[14];
-  ucontext.uc_mcontext.gregs[7] = reg_data[15];
-  ucontext.uc_mcontext.gregs[8] = reg_data[5];
-  ucontext.uc_mcontext.gregs[9] = reg_data[4];
-  ucontext.uc_mcontext.gregs[10] = reg_data[6];
-  ucontext.uc_mcontext.gregs[11] = reg_data[3];
-  ucontext.uc_mcontext.gregs[12] = reg_data[1];
-  ucontext.uc_mcontext.gregs[13] = reg_data[0];
-  ucontext.uc_mcontext.gregs[14] = reg_data[2];
-  ucontext.uc_mcontext.gregs[15] = reg_data[7];
-  ucontext.uc_mcontext.gregs[16] = reg_data[16];
-#endif
-
-  arg->ucontext->resize(sizeof(ucontext));
-  memcpy(arg->ucontext->data(), &ucontext, sizeof(ucontext));
-
-  // Don't touch the stack anymore.
-  while (*arg->exit_flag == 0) {
-  }
-}
-
-void test_get_context_and_wait(void* ucontext, volatile int* exit_flag) {
-  GetContextArg arg;
-  arg.ucontext = reinterpret_cast<std::vector<uint8_t>*>(ucontext);
-  arg.exit_flag = exit_flag;
-  test_level_one(1, 2, 3, 4, GetContextAndExit, &arg);
-}
diff --git a/libbacktrace/backtrace_testlib.h b/libbacktrace/backtrace_testlib.h
deleted file mode 100644
index 9b55e56..0000000
--- a/libbacktrace/backtrace_testlib.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _LIBBACKTRACE_BACKTRACE_TESTLIB_H
-#define _LIBBACKTRACE_BACKTRACE_TESTLIB_H
-
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-
-void test_loop_forever();
-void test_signal_handler(int);
-void test_signal_action(int, siginfo_t*, void*);
-int test_level_four(int, int, int, int, void (*)(void*), void*);
-int test_level_three(int, int, int, int, void (*)(void*), void*);
-int test_level_two(int, int, int, int, void (*)(void*), void*);
-int test_level_one(int, int, int, int, void (*)(void*), void*);
-int test_recursive_call(int, void (*)(void*), void*);
-void test_get_context_and_wait(void*, volatile int*);
-
-__END_DECLS
-
-#endif  // _LIBBACKTRACE_BACKTRACE_TESTLIB_H
diff --git a/libbacktrace/include/backtrace/Backtrace.h b/libbacktrace/include/backtrace/Backtrace.h
deleted file mode 100644
index 664b531..0000000
--- a/libbacktrace/include/backtrace/Backtrace.h
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _BACKTRACE_BACKTRACE_H
-#define _BACKTRACE_BACKTRACE_H
-
-#include <inttypes.h>
-#include <stdint.h>
-
-#include <string>
-#include <vector>
-
-#include <backtrace/backtrace_constants.h>
-#include <backtrace/BacktraceMap.h>
-
-#if defined(__LP64__)
-#define PRIPTR "016" PRIx64
-typedef uint64_t word_t;
-#else
-#define PRIPTR "08" PRIx64
-typedef uint32_t word_t;
-#endif
-
-enum BacktraceUnwindErrorCode : uint32_t {
-  BACKTRACE_UNWIND_NO_ERROR,
-  // Something failed while trying to perform the setup to begin the unwind.
-  BACKTRACE_UNWIND_ERROR_SETUP_FAILED,
-  // There is no map information to use with the unwind.
-  BACKTRACE_UNWIND_ERROR_MAP_MISSING,
-  // An error occurred that indicates a programming error.
-  BACKTRACE_UNWIND_ERROR_INTERNAL,
-  // The thread to unwind has disappeared before the unwind can begin.
-  BACKTRACE_UNWIND_ERROR_THREAD_DOESNT_EXIST,
-  // The thread to unwind has not responded to a signal in a timely manner.
-  BACKTRACE_UNWIND_ERROR_THREAD_TIMEOUT,
-  // Attempt to do an unsupported operation.
-  BACKTRACE_UNWIND_ERROR_UNSUPPORTED_OPERATION,
-  // Attempt to do an offline unwind without a context.
-  BACKTRACE_UNWIND_ERROR_NO_CONTEXT,
-  // The count of frames exceed MAX_BACKTRACE_FRAMES.
-  BACKTRACE_UNWIND_ERROR_EXCEED_MAX_FRAMES_LIMIT,
-  // Failed to read memory.
-  BACKTRACE_UNWIND_ERROR_ACCESS_MEM_FAILED,
-  // Failed to read registers.
-  BACKTRACE_UNWIND_ERROR_ACCESS_REG_FAILED,
-  // Failed to find a function in debug sections.
-  BACKTRACE_UNWIND_ERROR_FIND_PROC_INFO_FAILED,
-  // Failed to execute dwarf instructions in debug sections.
-  BACKTRACE_UNWIND_ERROR_EXECUTE_DWARF_INSTRUCTION_FAILED,
-  // Unwind information is incorrect.
-  BACKTRACE_UNWIND_ERROR_UNWIND_INFO,
-  // Unwind information stopped due to sp/pc repeating.
-  BACKTRACE_UNWIND_ERROR_REPEATED_FRAME,
-  // Unwind information stopped due to invalid elf.
-  BACKTRACE_UNWIND_ERROR_INVALID_ELF,
-};
-
-struct BacktraceUnwindError {
-  enum BacktraceUnwindErrorCode error_code;
-
-  union {
-    // for BACKTRACE_UNWIND_ERROR_ACCESS_MEM_FAILED
-    uint64_t addr;
-    // for BACKTRACE_UNWIND_ERROR_ACCESS_REG_FAILED
-    uint64_t regno;
-  } error_info;
-
-  BacktraceUnwindError() : error_code(BACKTRACE_UNWIND_NO_ERROR) {}
-};
-
-struct backtrace_frame_data_t {
-  size_t num;             // The current fame number.
-  uint64_t pc;            // The absolute pc.
-  uint64_t rel_pc;        // The relative pc.
-  uint64_t sp;            // The top of the stack.
-  size_t stack_size;      // The size of the stack, zero indicate an unknown stack size.
-  backtrace_map_t map;    // The map associated with the given pc.
-  std::string func_name;  // The function name associated with this pc, NULL if not found.
-  uint64_t func_offset;  // pc relative to the start of the function, only valid if func_name is not
-                         // NULL.
-};
-
-struct backtrace_stackinfo_t {
-  uint64_t start;
-  uint64_t end;
-  const uint8_t* data;
-};
-
-namespace unwindstack {
-class Regs;
-}
-
-class Backtrace {
- public:
-  enum ArchEnum : uint8_t {
-    ARCH_ARM,
-    ARCH_ARM64,
-    ARCH_X86,
-    ARCH_X86_64,
-  };
-
-  static void SetGlobalElfCache(bool enable);
-
-  // Create the correct Backtrace object based on what is to be unwound.
-  // If pid < 0 or equals the current pid, then the Backtrace object
-  // corresponds to the current process.
-  // If pid < 0 or equals the current pid and tid >= 0, then the Backtrace
-  // object corresponds to a thread in the current process.
-  // If pid >= 0 and tid < 0, then the Backtrace object corresponds to a
-  // different process.
-  // Tracing a thread in a different process is not supported.
-  // If map is NULL, then create the map and manage it internally.
-  // If map is not NULL, the map is still owned by the caller.
-  static Backtrace* Create(pid_t pid, pid_t tid, BacktraceMap* map = nullptr);
-
-  virtual ~Backtrace();
-
-  // Get the current stack trace and store in the backtrace_ structure.
-  virtual bool Unwind(size_t num_ignore_frames, void* context = nullptr) = 0;
-
-  static bool Unwind(unwindstack::Regs* regs, BacktraceMap* back_map,
-                     std::vector<backtrace_frame_data_t>* frames, size_t num_ignore_frames,
-                     std::vector<std::string>* skip_names, BacktraceUnwindError* error = nullptr);
-
-  // Get the function name and offset into the function given the pc.
-  // If the string is empty, then no valid function name was found,
-  // or the pc is not in any valid map.
-  virtual std::string GetFunctionName(uint64_t pc, uint64_t* offset,
-                                      const backtrace_map_t* map = nullptr);
-
-  // Fill in the map data associated with the given pc.
-  virtual void FillInMap(uint64_t pc, backtrace_map_t* map);
-
-  // Read the data at a specific address.
-  virtual bool ReadWord(uint64_t ptr, word_t* out_value) = 0;
-
-  // Read arbitrary data from a specific address. If a read request would
-  // span from one map to another, this call only reads up until the end
-  // of the current map.
-  // Returns the total number of bytes actually read.
-  virtual size_t Read(uint64_t addr, uint8_t* buffer, size_t bytes) = 0;
-
-  // Create a string representing the formatted line of backtrace information
-  // for a single frame.
-  virtual std::string FormatFrameData(size_t frame_num);
-  static std::string FormatFrameData(const backtrace_frame_data_t* frame);
-
-  pid_t Pid() const { return pid_; }
-  pid_t Tid() const { return tid_; }
-  size_t NumFrames() const { return frames_.size(); }
-
-  const backtrace_frame_data_t* GetFrame(size_t frame_num) {
-    if (frame_num >= frames_.size()) {
-      return nullptr;
-    }
-    return &frames_[frame_num];
-  }
-
-  typedef std::vector<backtrace_frame_data_t>::iterator iterator;
-  iterator begin() { return frames_.begin(); }
-  iterator end() { return frames_.end(); }
-
-  typedef std::vector<backtrace_frame_data_t>::const_iterator const_iterator;
-  const_iterator begin() const { return frames_.begin(); }
-  const_iterator end() const { return frames_.end(); }
-
-  BacktraceMap* GetMap() { return map_; }
-
-  BacktraceUnwindError GetError() { return error_; }
-
-  std::string GetErrorString(BacktraceUnwindError error);
-
-  // Set whether to skip frames in libbacktrace/libunwindstack when doing a local unwind.
-  void SetSkipFrames(bool skip_frames) { skip_frames_ = skip_frames; }
-
- protected:
-  Backtrace(pid_t pid, pid_t tid, BacktraceMap* map);
-
-  // The name returned is not demangled, GetFunctionName() takes care of
-  // demangling the name.
-  virtual std::string GetFunctionNameRaw(uint64_t pc, uint64_t* offset) = 0;
-
-  virtual bool VerifyReadWordArgs(uint64_t ptr, word_t* out_value);
-
-  bool BuildMap();
-
-  pid_t pid_;
-  pid_t tid_;
-
-  BacktraceMap* map_;
-  bool map_shared_;
-
-  std::vector<backtrace_frame_data_t> frames_;
-
-  // Skip frames in libbacktrace/libunwindstack when doing a local unwind.
-  bool skip_frames_ = true;
-
-  BacktraceUnwindError error_;
-};
-
-#endif // _BACKTRACE_BACKTRACE_H
diff --git a/libbacktrace/include/backtrace/BacktraceMap.h b/libbacktrace/include/backtrace/BacktraceMap.h
deleted file mode 100644
index eab1328..0000000
--- a/libbacktrace/include/backtrace/BacktraceMap.h
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _BACKTRACE_BACKTRACE_MAP_H
-#define _BACKTRACE_BACKTRACE_MAP_H
-
-#include <stdint.h>
-#include <sys/types.h>
-#ifdef _WIN32
-// MINGW does not define these constants.
-#define PROT_NONE 0
-#define PROT_READ 0x1
-#define PROT_WRITE 0x2
-#define PROT_EXEC 0x4
-#else
-#include <sys/mman.h>
-#endif
-
-#include <deque>
-#include <iterator>
-#include <memory>
-#include <string>
-#include <vector>
-
-// Forward declaration.
-struct backtrace_stackinfo_t;
-
-// Special flag to indicate a map is in /dev/. However, a map in
-// /dev/ashmem/... does not set this flag.
-static constexpr int PROT_DEVICE_MAP = 0x8000;
-// Special flag to indicate that this map represents an elf file
-// created by ART for use with the gdb jit debug interface.
-// This should only ever appear in offline maps data.
-static constexpr int PROT_JIT_SYMFILE_MAP = 0x4000;
-
-struct backtrace_map_t {
-  uint64_t start = 0;
-  uint64_t end = 0;
-  uint64_t offset = 0;
-  uint64_t load_bias = 0;
-  int flags = 0;
-  std::string name;
-
-  // Returns `name` if non-empty, or `<anonymous:0x...>` otherwise.
-  std::string Name() const;
-};
-
-namespace unwindstack {
-class Memory;
-}
-
-class BacktraceMap {
-public:
-  // If uncached is true, then parse the current process map as of the call.
-  // Passing a map created with uncached set to true to Backtrace::Create()
-  // is unsupported.
-  static BacktraceMap* Create(pid_t pid, bool uncached = false);
-
-  virtual ~BacktraceMap();
-
-  class iterator : public std::iterator<std::bidirectional_iterator_tag, backtrace_map_t*> {
-   public:
-    iterator(BacktraceMap* map, size_t index) : map_(map), index_(index) {}
-
-    iterator& operator++() {
-      index_++;
-      return *this;
-    }
-    const iterator operator++(int increment) {
-      index_ += increment;
-      return *this;
-    }
-    iterator& operator--() {
-      index_--;
-      return *this;
-    }
-    const iterator operator--(int decrement) {
-      index_ -= decrement;
-      return *this;
-    }
-
-    bool operator==(const iterator& rhs) { return this->index_ == rhs.index_; }
-    bool operator!=(const iterator& rhs) { return this->index_ != rhs.index_; }
-
-    const backtrace_map_t* operator*() {
-      if (index_ >= map_->size()) {
-        return nullptr;
-      }
-      backtrace_map_t* map = &map_->maps_[index_];
-      if (map->load_bias == static_cast<uint64_t>(-1)) {
-        map->load_bias = map_->GetLoadBias(index_);
-      }
-      return map;
-    }
-
-   private:
-    BacktraceMap* map_ = nullptr;
-    size_t index_ = 0;
-  };
-
-  iterator begin() { return iterator(this, 0); }
-  iterator end() { return iterator(this, maps_.size()); }
-
-  // Fill in the map data structure for the given address.
-  virtual void FillIn(uint64_t addr, backtrace_map_t* map);
-
-  // Get BuildId of ELF file at the given address, or empty string on failure.
-  virtual std::string GetBuildId(uint64_t /*pc*/) { return std::string(); }
-
-  // Only supported with the new unwinder.
-  virtual std::string GetFunctionName(uint64_t /*pc*/, uint64_t* /*offset*/) { return ""; }
-  virtual std::shared_ptr<unwindstack::Memory> GetProcessMemory() { return nullptr; }
-
-  // The flags returned are the same flags as used by the mmap call.
-  // The values are PROT_*.
-  int GetFlags(uint64_t pc) {
-    backtrace_map_t map;
-    FillIn(pc, &map);
-    if (IsValid(map)) {
-      return map.flags;
-    }
-    return PROT_NONE;
-  }
-
-  bool IsReadable(uint64_t pc) { return GetFlags(pc) & PROT_READ; }
-  bool IsWritable(uint64_t pc) { return GetFlags(pc) & PROT_WRITE; }
-  bool IsExecutable(uint64_t pc) { return GetFlags(pc) & PROT_EXEC; }
-
-  // In order to use the iterators on this object, a caller must
-  // call the LockIterator and UnlockIterator function to guarantee
-  // that the data does not change while it's being used.
-  virtual void LockIterator() {}
-  virtual void UnlockIterator() {}
-
-  size_t size() const { return maps_.size(); }
-
-  virtual bool Build();
-
-  static inline bool IsValid(const backtrace_map_t& map) {
-    return map.end > 0;
-  }
-
-  void SetSuffixesToIgnore(std::vector<std::string> suffixes) {
-    suffixes_to_ignore_.insert(suffixes_to_ignore_.end(), suffixes.begin(), suffixes.end());
-  }
-
-  const std::vector<std::string>& GetSuffixesToIgnore() { return suffixes_to_ignore_; }
-
-  // Disabling the resolving of names results in the function name being
-  // set to an empty string and the function offset being set to zero
-  // in the frame data when unwinding.
-  void SetResolveNames(bool resolve) { resolve_names_ = resolve; }
-
-  bool ResolveNames() { return resolve_names_; }
-
- protected:
-  BacktraceMap(pid_t pid);
-
-  virtual uint64_t GetLoadBias(size_t /* index */) { return 0; }
-
-  pid_t pid_;
-  std::deque<backtrace_map_t> maps_;
-  std::vector<std::string> suffixes_to_ignore_;
-  bool resolve_names_ = true;
-};
-
-class ScopedBacktraceMapIteratorLock {
-public:
-  explicit ScopedBacktraceMapIteratorLock(BacktraceMap* map) : map_(map) {
-    map->LockIterator();
-  }
-
-  ~ScopedBacktraceMapIteratorLock() {
-    map_->UnlockIterator();
-  }
-
-private:
-  BacktraceMap* map_;
-};
-
-#endif // _BACKTRACE_BACKTRACE_MAP_H
diff --git a/libbacktrace/include/backtrace/backtrace_constants.h b/libbacktrace/include/backtrace/backtrace_constants.h
deleted file mode 100644
index 1a2da36..0000000
--- a/libbacktrace/include/backtrace/backtrace_constants.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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
- *
- *      http://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 _BACKTRACE_BACKTRACE_CONSTANTS_H
-#define _BACKTRACE_BACKTRACE_CONSTANTS_H
-
-// When the pid to be traced is set to this value, then trace the current
-// process. If the tid value is not BACKTRACE_NO_TID, then the specified
-// thread from the current process will be traced.
-#define BACKTRACE_CURRENT_PROCESS (-1)
-// When the tid to be traced is set to this value, then trace the specified
-// current thread of the specified pid.
-#define BACKTRACE_CURRENT_THREAD (-1)
-
-#define MAX_BACKTRACE_FRAMES 256
-
-#endif // _BACKTRACE_BACKTRACE_CONSTANTS_H
diff --git a/libbacktrace/testdata/arm/libGLESv2_adreno.so b/libbacktrace/testdata/arm/libGLESv2_adreno.so
deleted file mode 100644
index 871f6dc..0000000
--- a/libbacktrace/testdata/arm/libGLESv2_adreno.so
+++ /dev/null
diff --git a/libbacktrace/testdata/arm/libandroid_runtime.so b/libbacktrace/testdata/arm/libandroid_runtime.so
deleted file mode 100644
index e4283e6..0000000
--- a/libbacktrace/testdata/arm/libandroid_runtime.so
+++ /dev/null
diff --git a/libbacktrace/testdata/arm/libart.so b/libbacktrace/testdata/arm/libart.so
deleted file mode 100644
index bed8e35..0000000
--- a/libbacktrace/testdata/arm/libart.so
+++ /dev/null
diff --git a/libbacktrace/testdata/arm/libbacktrace_test_arm_exidx.so b/libbacktrace/testdata/arm/libbacktrace_test_arm_exidx.so
deleted file mode 100755
index 454b032..0000000
--- a/libbacktrace/testdata/arm/libbacktrace_test_arm_exidx.so
+++ /dev/null
diff --git a/libbacktrace/testdata/arm/libbacktrace_test_debug_frame.so b/libbacktrace/testdata/arm/libbacktrace_test_debug_frame.so
deleted file mode 100755
index 787f2cb..0000000
--- a/libbacktrace/testdata/arm/libbacktrace_test_debug_frame.so
+++ /dev/null
diff --git a/libbacktrace/testdata/arm/libbacktrace_test_gnu_debugdata.so b/libbacktrace/testdata/arm/libbacktrace_test_gnu_debugdata.so
deleted file mode 100755
index 9340d98..0000000
--- a/libbacktrace/testdata/arm/libbacktrace_test_gnu_debugdata.so
+++ /dev/null
diff --git a/libbacktrace/testdata/arm/offline_testdata b/libbacktrace/testdata/arm/offline_testdata
deleted file mode 100644
index d5b8f47..0000000
--- a/libbacktrace/testdata/arm/offline_testdata
+++ /dev/null
@@ -1,105 +0,0 @@
-pid: 32232 tid: 32233
-map: start: aad19000 end: aad6c000 offset: 0 load_bias: 0 flags: 5 name: /data/backtrace_test32
-map: start: aad6c000 end: aad6e000 offset: 52000 load_bias: 0 flags: 1 name: /data/backtrace_test32
-map: start: aad6e000 end: aad6f000 offset: 54000 load_bias: 0 flags: 3 name: /data/backtrace_test32
-map: start: e7380000 end: e7400000 offset: 0 load_bias: 0 flags: 3 name: [anon:libc_malloc]
-map: start: e745f000 end: e7463000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/libnetd_client.so
-map: start: e7463000 end: e7464000 offset: 3000 load_bias: 0 flags: 1 name: /system/lib/libnetd_client.so
-map: start: e7464000 end: e7465000 offset: 4000 load_bias: 0 flags: 3 name: /system/lib/libnetd_client.so
-map: start: e7480000 end: e7500000 offset: 0 load_bias: 0 flags: 3 name: [anon:libc_malloc]
-map: start: e7558000 end: e756c000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/libunwind.so
-map: start: e756c000 end: e756d000 offset: 0 load_bias: 0 flags: 0 name: 
-map: start: e756d000 end: e756e000 offset: 14000 load_bias: 0 flags: 1 name: /system/lib/libunwind.so
-map: start: e756e000 end: e756f000 offset: 15000 load_bias: 0 flags: 3 name: /system/lib/libunwind.so
-map: start: e756f000 end: e75b5000 offset: 0 load_bias: 0 flags: 3 name: [anon:.bss]
-map: start: e75d4000 end: e75e1000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/libbase.so
-map: start: e75e1000 end: e75e2000 offset: c000 load_bias: 0 flags: 1 name: /system/lib/libbase.so
-map: start: e75e2000 end: e75e3000 offset: d000 load_bias: 0 flags: 3 name: /system/lib/libbase.so
-map: start: e7600000 end: e7616000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/liblzma.so
-map: start: e7616000 end: e7617000 offset: 15000 load_bias: 0 flags: 1 name: /system/lib/liblzma.so
-map: start: e7617000 end: e7618000 offset: 16000 load_bias: 0 flags: 3 name: /system/lib/liblzma.so
-map: start: e7618000 end: e761d000 offset: 0 load_bias: 0 flags: 3 name: [anon:.bss]
-map: start: e7647000 end: e7656000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/liblog.so
-map: start: e7656000 end: e7657000 offset: e000 load_bias: 0 flags: 1 name: /system/lib/liblog.so
-map: start: e7657000 end: e7658000 offset: f000 load_bias: 0 flags: 3 name: /system/lib/liblog.so
-map: start: e7681000 end: e76a2000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/libm.so
-map: start: e76a2000 end: e76a3000 offset: 20000 load_bias: 0 flags: 1 name: /system/lib/libm.so
-map: start: e76a3000 end: e76a4000 offset: 21000 load_bias: 0 flags: 3 name: /system/lib/libm.so
-map: start: e76eb000 end: e76ee000 offset: 0 load_bias: 0 flags: 5 name: /data/libbacktrace_test.so
-map: start: e76ee000 end: e76ef000 offset: 2000 load_bias: 0 flags: 1 name: /data/libbacktrace_test.so
-map: start: e76ef000 end: e76f0000 offset: 3000 load_bias: 0 flags: 3 name: /data/libbacktrace_test.so
-map: start: e7712000 end: e771f000 offset: 0 load_bias: 0 flags: 5 name: /system/lib/libbacktrace.so
-map: start: e771f000 end: e7720000 offset: 0 load_bias: 0 flags: 0 name: 
-map: start: e7720000 end: e7721000 offset: d000 load_bias: 0 flags: 1 name: /system/lib/libbacktrace.so
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diff --git a/libbacktrace/testdata/arm/offline_testdata_for_libGLESv2_adreno b/libbacktrace/testdata/arm/offline_testdata_for_libGLESv2_adreno
deleted file mode 100644
index d7c186e..0000000
--- a/libbacktrace/testdata/arm/offline_testdata_for_libGLESv2_adreno
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diff --git a/libbacktrace/testdata/arm/offline_testdata_for_libandroid_runtime b/libbacktrace/testdata/arm/offline_testdata_for_libandroid_runtime
deleted file mode 100644
index 54f3525..0000000
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diff --git a/libbacktrace/testdata/arm/offline_testdata_for_libart b/libbacktrace/testdata/arm/offline_testdata_for_libart
deleted file mode 100644
index c1369ff..0000000
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diff --git a/libbacktrace/testdata/arm64/eglSubDriverAndroid.so b/libbacktrace/testdata/arm64/eglSubDriverAndroid.so
deleted file mode 100644
index 10ce06b..0000000
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diff --git a/libbacktrace/testdata/arm64/libbacktrace_test_eh_frame.so b/libbacktrace/testdata/arm64/libbacktrace_test_eh_frame.so
deleted file mode 100755
index 880f337..0000000
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diff --git a/libbacktrace/testdata/arm64/libskia.so b/libbacktrace/testdata/arm64/libskia.so
deleted file mode 100644
index ef1a6a1..0000000
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diff --git a/libbacktrace/testdata/arm64/offline_testdata b/libbacktrace/testdata/arm64/offline_testdata
deleted file mode 100644
index cee9f72..0000000
--- a/libbacktrace/testdata/arm64/offline_testdata
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diff --git a/libbacktrace/testdata/arm64/offline_testdata_for_eglSubDriverAndroid b/libbacktrace/testdata/arm64/offline_testdata_for_eglSubDriverAndroid
deleted file mode 100644
index 673e30e..0000000
--- a/libbacktrace/testdata/arm64/offline_testdata_for_eglSubDriverAndroid
+++ /dev/null
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diff --git a/libbacktrace/testdata/arm64/offline_testdata_for_libskia b/libbacktrace/testdata/arm64/offline_testdata_for_libskia
deleted file mode 100644
index da820c0..0000000
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diff --git a/libbacktrace/testdata/x86/libbacktrace_test_gnu_debugdata.so b/libbacktrace/testdata/x86/libbacktrace_test_gnu_debugdata.so
deleted file mode 100755
index ea58dfb..0000000
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diff --git a/libbacktrace/testdata/x86/offline_testdata b/libbacktrace/testdata/x86/offline_testdata
deleted file mode 100644
index 920b338..0000000
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diff --git a/libbacktrace/testdata/x86_64/libbacktrace_test_eh_frame.so b/libbacktrace/testdata/x86_64/libbacktrace_test_eh_frame.so
deleted file mode 100755
index f116658..0000000
--- a/libbacktrace/testdata/x86_64/libbacktrace_test_eh_frame.so
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diff --git a/libbacktrace/testdata/x86_64/offline_testdata b/libbacktrace/testdata/x86_64/offline_testdata
deleted file mode 100644
index c6bb241..0000000
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