1 files changed, 49 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc
index efdea64b4e..898d04c125 100644
--- a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc
+++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc
@@ -28,6 +28,13 @@
 #include <vector>
 #endif
 
+#if defined(__Fuchsia__)
+#include <fuchsia/intl/cpp/fidl.h>
+#include <lib/async-loop/cpp/loop.h>
+#include <lib/sys/cpp/component_context.h>
+#include <zircon/types.h>
+#endif
+
 #include <cstdlib>
 #include <cstring>
 #include <string>
@@ -140,6 +147,48 @@ time_zone local_time_zone() {
   }
   CFRelease(tz_default);
 #endif
+#if defined(__Fuchsia__)
+  std::string primary_tz;
+  [&]() {
+    // Note: We can't use the synchronous FIDL API here because it doesn't
+    // allow timeouts; if the FIDL call failed, local_time_zone() would never
+    // return.
+
+    const zx::duration kTimeout = zx::msec(500);
+
+    // Don't attach to the thread because otherwise the thread's dispatcher
+    // would be set to null when the loop is destroyed, causing any other FIDL
+    // code running on the same thread to crash.
+    async::Loop loop(&kAsyncLoopConfigNeverAttachToThread);
+    std::unique_ptr<sys::ComponentContext> context =
+        sys::ComponentContext::Create();
+
+    fuchsia::intl::PropertyProviderHandle handle;
+    zx_status_t status = context->svc()->Connect(handle.NewRequest());
+    if (status != ZX_OK) {
+      return;
+    }
+
+    fuchsia::intl::PropertyProviderPtr intl_provider;
+    status = intl_provider.Bind(std::move(handle), loop.dispatcher());
+    if (status != ZX_OK) {
+      return;
+    }
+
+    intl_provider->GetProfile(
+        [&loop, &primary_tz](fuchsia::intl::Profile profile) {
+          if (!profile.time_zones().empty()) {
+            primary_tz = profile.time_zones()[0].id;
+          }
+          loop.Quit();
+        });
+    loop.Run(zx::deadline_after(kTimeout));
+  }();
+
+  if (!primary_tz.empty()) {
+    zone = primary_tz.c_str();
+  }
+#endif
 
   // Allow ${TZ} to override to default zone.
   char* tz_env = nullptr;