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66 lines
1.7 KiB
66 lines
1.7 KiB
4 months ago
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//===-- 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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