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26 lines
899 B
C++
26 lines
899 B
C++
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// Copyright 2018 The Chromium Authors. All rights reserved.
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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_coverage.h"
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#include "base/no_destructor.h"
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#include "base/synchronization/lock.h"
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extern "C" int __llvm_profile_dump(void);
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namespace base {
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void WriteClangCoverageProfile() {
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// __llvm_profile_dump() guarantees that it will not dump coverage information
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// if it is being called twice or more. However, it is not thread safe, as it
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// is supposed to be called from atexit() handler rather than being called
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// directly from random places. Since we have to call it ourselves, we must
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// ensure thread safety in order to prevent duplication of coverage counters.
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static base::NoDestructor<base::Lock> lock;
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base::AutoLock auto_lock(*lock);
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__llvm_profile_dump();
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}
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} // namespace base
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