- 45690246da1e36acde86c941b68aad2248b16ea7 Import of CCTZ from Githu…

…b. by Abseil Team <absl-team@google.com>

  - ff3cf0774f9903fb62f7012af24c0901286a1b80 Fix -Wunreachable-code-return warning (from clang 6.0) in by Derek Mauro <dmauro@google.com>
  - b41ca35e56f6137cf6672d16613a7edfd6107e27 Include port.h to drag in platform-specific configurations. by Abseil Team <absl-team@google.com>
  - 5d50b728937d245caedaa2208a97d52f55040134 Set the default symbolizer for Mutex deadlock detector re... by Derek Mauro <dmauro@google.com>

GitOrigin-RevId: 45690246da1e36acde86c941b68aad2248b16ea7
Change-Id: I2c6a87e9090657ff3fb456f3409bfdc24b8b765a

absl/debugging/failure_signal_handler.cc

@@ -162,8 +162,9 @@ static int MaybeSetupAlternateStack() {
 #ifndef _WIN32
   ABSL_ATTRIBUTE_UNUSED static const bool kOnce = SetupAlternateStackOnce();
   return SA_ONSTACK;
-#endif
+#else
   return 0;
+#endif
 }
 
 #ifdef ABSL_HAVE_SIGACTION

absl/debugging/internal/symbolize.h

@@ -20,6 +20,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include "absl/base/port.h"  // Needed for string vs std::string
 
 #ifdef ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE
 #error ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE cannot be directly set

absl/synchronization/BUILD.bazel

@@ -77,6 +77,7 @@ cc_library(
         "//absl/base:dynamic_annotations",
         "//absl/base:malloc_internal",
         "//absl/debugging:stacktrace",
+        "//absl/debugging:symbolize",
         "//absl/time",
     ],
 )

absl/synchronization/CMakeLists.txt

@@ -44,7 +44,8 @@ list(APPEND SYNCHRONIZATION_SRC
   "notification.cc"
   "mutex.cc"
 )
-set(SYNCHRONIZATION_PUBLIC_LIBRARIES absl::base absl::time)
+
+set(SYNCHRONIZATION_PUBLIC_LIBRARIES absl::base absl::stacktrace absl::symbolize absl::time)
 
 absl_library(
   TARGET

absl/synchronization/mutex.cc

@@ -50,6 +50,7 @@
 #include "absl/base/internal/thread_identity.h"
 #include "absl/base/port.h"
 #include "absl/debugging/stacktrace.h"
+#include "absl/debugging/symbolize.h"
 #include "absl/synchronization/internal/graphcycles.h"
 #include "absl/synchronization/internal/per_thread_sem.h"
 #include "absl/time/time.h"
@@ -111,7 +112,8 @@ ABSL_CONST_INIT absl::base_internal::AtomicHook<
 ABSL_CONST_INIT absl::base_internal::AtomicHook<
     void (*)(const char *msg, const void *cv)> cond_var_tracer;
 ABSL_CONST_INIT absl::base_internal::AtomicHook<
-    bool (*)(const void *pc, char *out, int out_size)> symbolizer;
+    bool (*)(const void *pc, char *out, int out_size)>
+    symbolizer(absl::Symbolize);
 
 }  // namespace
 

absl/synchronization/mutex.h

@@ -979,6 +979,12 @@ void RegisterCondVarTracer(void (*fn)(const char *msg, const void *cv));
 // to 'out.'
 //
 // This has the same memory ordering concerns as RegisterMutexProfiler() above.
+//
+// DEPRECATED: The default symbolizer function is absl::Symbolize() and the
+// ability to register a different hook for symbolizing stack traces will be
+// removed on or after 2023-05-01.
+ABSL_DEPRECATED("absl::RegisterSymbolizer() is deprecated and will be removed "
+                "on or after 2023-05-01")
 void RegisterSymbolizer(bool (*fn)(const void *pc, char *out, int out_size));
 
 // EnableMutexInvariantDebugging()

absl/time/internal/cctz/testdata/version

@@ -1 +1 @@
-2018d-2-g8d1dac0
+2018e-2-g99dd695