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Diffstat (limited to 'lib/scudo/scudo_tls_context_android.inc')
-rw-r--r-- | lib/scudo/scudo_tls_context_android.inc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/scudo/scudo_tls_context_android.inc b/lib/scudo/scudo_tls_context_android.inc new file mode 100644 index 000000000000..f1951319d487 --- /dev/null +++ b/lib/scudo/scudo_tls_context_android.inc @@ -0,0 +1,54 @@ +//===-- scudo_tls_context_android.inc ---------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +/// +/// Android specific base thread context definition. +/// +//===----------------------------------------------------------------------===// + +#ifndef SCUDO_TLS_CONTEXT_ANDROID_INC_ +#define SCUDO_TLS_CONTEXT_ANDROID_INC_ + +#ifndef SCUDO_TLS_H_ +# error "This file must be included inside scudo_tls.h." +#endif // SCUDO_TLS_H_ + +#if SANITIZER_LINUX && SANITIZER_ANDROID + +struct ScudoThreadContextPlatform { + INLINE bool tryLock() { + if (Mutex.TryLock()) { + atomic_store_relaxed(&SlowLockPrecedence, 0); + return true; + } + if (atomic_load_relaxed(&SlowLockPrecedence) == 0) + atomic_store_relaxed(&SlowLockPrecedence, NanoTime()); + return false; + } + + INLINE void lock() { + Mutex.Lock(); + atomic_store_relaxed(&SlowLockPrecedence, 0); + } + + INLINE void unlock() { + Mutex.Unlock(); + } + + INLINE u64 getSlowLockPrecedence() { + return atomic_load_relaxed(&SlowLockPrecedence); + } + + private: + StaticSpinMutex Mutex; + atomic_uint64_t SlowLockPrecedence; +}; + +#endif // SANITIZER_LINUX && SANITIZER_ANDROID + +#endif // SCUDO_TLS_CONTEXT_ANDROID_INC_ |