blob: edee49adf6a7e523bca319f381c9d6d9b0af8548 [file] [log] [blame]
//===-- asan_lock.h ---------------------------------------------*- C++ -*-===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This file is a part of AddressSanitizer, an address sanity checker.
// A wrapper for a simple lock.
#ifndef ASAN_LOCK_H
#define ASAN_LOCK_H
#include "sanitizer_common/sanitizer_mutex.h"
#include "asan_internal.h"
// The locks in ASan are global objects and they are never destroyed to avoid
// at-exit races (that is, a lock is being used by other threads while the main
// thread is doing atexit destructors).
// We define the class using opaque storage to avoid including system headers.
namespace __asan {
class AsanLock {
explicit AsanLock(LinkerInitialized);
void Lock();
void Unlock();
bool IsLocked() { return owner_ != 0; }
uptr opaque_storage_[10];
uptr owner_; // for debugging and for malloc_introspection_t interface
typedef GenericScopedLock<AsanLock> ScopedLock;
} // namespace __asan
#endif // ASAN_LOCK_H