forked from OSchip/llvm-project
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
//===-- scudo_tsd_shared.inc ------------------------------------*- 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 shared TSD fastpath functions implementation.
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///
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//===----------------------------------------------------------------------===//
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#ifndef SCUDO_TSD_H_
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# error "This file must be included inside scudo_tsd.h."
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#endif // SCUDO_TSD_H_
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#if !SCUDO_TSD_EXCLUSIVE
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extern pthread_key_t PThreadKey;
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#if SANITIZER_LINUX && !SANITIZER_ANDROID
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__attribute__((tls_model("initial-exec")))
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extern THREADLOCAL ScudoTSD *CurrentTSD;
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#endif
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ALWAYS_INLINE ScudoTSD* getCurrentTSD() {
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#if SANITIZER_ANDROID
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return reinterpret_cast<ScudoTSD *>(*get_android_tls_ptr());
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#elif SANITIZER_LINUX
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return CurrentTSD;
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#else
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return reinterpret_cast<ScudoTSD *>(pthread_getspecific(PThreadKey));
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#endif // SANITIZER_ANDROID
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}
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ALWAYS_INLINE void initThreadMaybe(bool MinimalInit = false) {
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if (LIKELY(getCurrentTSD()))
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return;
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initThread(MinimalInit);
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}
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ScudoTSD *getTSDAndLockSlow(ScudoTSD *TSD);
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ALWAYS_INLINE ScudoTSD *getTSDAndLock(bool *UnlockRequired) {
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ScudoTSD *TSD = getCurrentTSD();
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DCHECK(TSD && "No TSD associated with the current thread!");
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*UnlockRequired = true;
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// Try to lock the currently associated context.
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if (TSD->tryLock())
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return TSD;
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// If it failed, go the slow path.
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return getTSDAndLockSlow(TSD);
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}
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#endif // !SCUDO_TSD_EXCLUSIVE
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