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- // Copyright 2018 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/test/clang_profiling.h"
- #include "base/no_destructor.h"
- #include "base/synchronization/lock.h"
- #include "build/build_config.h"
- extern "C" int __llvm_profile_dump(void);
- namespace base {
- void WriteClangProfilingProfile() {
- // __llvm_profile_dump() guarantees that it will not dump profiling
- // information if it is being called twice or more. However, it is not thread
- // safe, as it is supposed to be called from atexit() handler rather than
- // being called directly from random places. Since we have to call it
- // ourselves, we must ensure thread safety in order to prevent duplication of
- // profiling counters.
- static base::NoDestructor<base::Lock> lock;
- base::AutoLock auto_lock(*lock);
- // Fuchsia's profile runtime does not handle profile dumping.
- #if !BUILDFLAG(IS_FUCHSIA)
- __llvm_profile_dump();
- #endif // !BUILDFLAG(IS_FUCHSIA)
- }
- } // namespace base
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