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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
//===-- scudo_tsd.h ---------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// Scudo thread specific data definition.
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/// Implementation will differ based on the thread local storage primitives
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/// offered by the underlying platform.
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///
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//===----------------------------------------------------------------------===//
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#ifndef SCUDO_TSD_H_
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#define SCUDO_TSD_H_
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#include "scudo_allocator.h"
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#include "scudo_utils.h"
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#include <pthread.h>
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namespace __scudo {
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struct ALIGNED(SANITIZER_CACHE_LINE_SIZE) ScudoTSD {
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AllocatorCacheT Cache;
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uptr QuarantineCachePlaceHolder[4];
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void init();
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void commitBack();
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INLINE bool tryLock() {
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if (Mutex.TryLock()) {
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atomic_store_relaxed(&Precedence, 0);
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return true;
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}
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if (atomic_load_relaxed(&Precedence) == 0)
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atomic_store_relaxed(&Precedence, static_cast<uptr>(
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MonotonicNanoTime() >> FIRST_32_SECOND_64(16, 0)));
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return false;
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}
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INLINE void lock() {
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atomic_store_relaxed(&Precedence, 0);
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Mutex.Lock();
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}
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INLINE void unlock() { Mutex.Unlock(); }
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INLINE uptr getPrecedence() { return atomic_load_relaxed(&Precedence); }
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private:
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StaticSpinMutex Mutex;
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atomic_uintptr_t Precedence;
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};
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void initThread(bool MinimalInit);
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// TSD model specific fastpath functions definitions.
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#include "scudo_tsd_exclusive.inc"
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#include "scudo_tsd_shared.inc"
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} // namespace __scudo
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#endif // SCUDO_TSD_H_
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