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