Abseil LTS 2020092320200923

What's New:
* `absl::StatusOr<T>` has been released. See our [blog
  post](https://abseil.io/blog/2020-091021-status) for more
  information.
* Abseil Flags reflection interfaces have been released.
* Abseil Flags memory usage has been significantly optimized.
* Abseil now supports a "hardened" build mode. This build mode enables
  runtime checks that guard against programming errors that may lead
  to security vulnerabilities.

Notable Fixes:
* Sanitizer dynamic annotations like `AnnotateRWLockCreate` that are
  also defined by the compiler sanitizer implementation are no longer
  also defined by Abseil.
* Sanitizer macros are now prefixed with `ABSL_` to avoid naming collisions.
* Sanitizer usage is now automatically detected and no longer requires
  macros like `ADDRESS_SANITIZER` to be defined on the command line.

Breaking Changes:
* Abseil no longer contains a `dynamic_annotations` library. Users
  using a supported build system (Bazel or CMake) are unaffected by
  this, but users manually specifying link libraries may get an error
  about a missing linker input.

Baseline: 7680a5f8efe32de4753baadbd63e74e59d95bac1
Cherry picks: None

1 files changed, 10 insertions, 10 deletions

diff --git a/absl/base/spinlock_test_common.cc b/absl/base/spinlock_test_common.cc
index 08f61ba8..dee266e4 100644
--- a/absl/base/spinlock_test_common.cc
+++ b/absl/base/spinlock_test_common.cc
@@ -20,10 +20,12 @@
 #include <limits>
 #include <random>
 #include <thread>  // NOLINT(build/c++11)
+#include <type_traits>
 #include <vector>
 
 #include "gtest/gtest.h"
 #include "absl/base/attributes.h"
+#include "absl/base/config.h"
 #include "absl/base/internal/low_level_scheduling.h"
 #include "absl/base/internal/scheduling_mode.h"
 #include "absl/base/internal/spinlock.h"
@@ -56,12 +58,10 @@ namespace {
 static constexpr int kArrayLength = 10;
 static uint32_t values[kArrayLength];
 
-static SpinLock static_spinlock(base_internal::kLinkerInitialized);
-static SpinLock static_cooperative_spinlock(
-    base_internal::kLinkerInitialized,
-    base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL);
-static SpinLock static_noncooperative_spinlock(
-    base_internal::kLinkerInitialized, base_internal::SCHEDULE_KERNEL_ONLY);
+ABSL_CONST_INIT static SpinLock static_cooperative_spinlock(
+    absl::kConstInit, base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL);
+ABSL_CONST_INIT static SpinLock static_noncooperative_spinlock(
+    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
 
 // Simple integer hash function based on the public domain lookup2 hash.
 // http://burtleburtle.net/bob/c/lookup2.c
@@ -105,6 +105,10 @@ static void ThreadedTest(SpinLock* spinlock) {
   }
 }
 
+#ifndef ABSL_HAVE_THREAD_SANITIZER
+static_assert(std::is_trivially_destructible<SpinLock>(), "");
+#endif
+
 TEST(SpinLock, StackNonCooperativeDisablesScheduling) {
   SpinLock spinlock(base_internal::SCHEDULE_KERNEL_ONLY);
   spinlock.Lock();
@@ -191,10 +195,6 @@ TEST(SpinLock, WaitCyclesEncoding) {
   EXPECT_GT(expected_max_value_decoded, before_max_value_decoded);
 }
 
-TEST(SpinLockWithThreads, StaticSpinLock) {
-  ThreadedTest(&static_spinlock);
-}
-
 TEST(SpinLockWithThreads, StackSpinLock) {
   SpinLock spinlock;
   ThreadedTest(&spinlock);