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++ // Copyright (C) 2017 Intel Corporation.
++ // Copyright (C) 2022 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef QTSAN_IMPL_H
++ #define QTSAN_IMPL_H
++
++ #include <QtCore/qglobal.h>
++
++ #if (__has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__)) && __has_include(<sanitizer/tsan_interface.h>)
++ # define QT_BUILDING_UNDER_TSAN
++ # include <sanitizer/tsan_interface.h>
++ #endif
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QtTsan {
++ #ifdef QT_BUILDING_UNDER_TSAN
++ constexpr inline bool IsEnabled = true;
++
++ inline void futexAcquire(void *addr, void *addr2 = nullptr)
++ {
++ // A futex call ensures total ordering on the futex words
++ // (in either success or failure of the call). Instruct TSAN accordingly,
++ // as TSAN does not understand the futex(2) syscall (or equivalent).
++ ::__tsan_acquire(addr);
++ if (addr2)
++ ::__tsan_acquire(addr2);
++ }
++
++ inline void futexRelease(void *addr, void *addr2 = nullptr)
++ {
++ if (addr2)
++ ::__tsan_release(addr2);
++ ::__tsan_release(addr);
++ }
++
++ inline void latchWait(const void *addr)
++ {
++ ::__tsan_acquire(const_cast<void *>(addr));
++ }
++
++ inline void latchCountDown(void *addr)
++ {
++ ::__tsan_release(addr);
++ }
++
++ inline void mutexPreLock(void *addr, unsigned flags)
++ {
++ ::__tsan_mutex_pre_lock(addr, flags);
++ }
++
++ inline void mutexPostLock(void *addr, unsigned flags, int recursion)
++ {
++ ::__tsan_mutex_post_lock(addr, flags, recursion);
++ }
++
++ inline void mutexPreUnlock(void *addr, unsigned flags)
++ {
++ ::__tsan_mutex_pre_unlock(addr, flags);
++ }
++
++ inline void mutexPostUnlock(void *addr, unsigned flags)
++ {
++ ::__tsan_mutex_post_unlock(addr, flags);
++ }
++
++ enum : unsigned {
++ MutexWriteReentrant = ::__tsan_mutex_write_reentrant,
++ TryLock = ::__tsan_mutex_try_lock,
++ TryLockFailed = ::__tsan_mutex_try_lock_failed,
++ ReadLock = ::__tsan_mutex_read_lock,
++ };
++ #else
++ constexpr inline bool IsEnabled = false;
++
++ inline void futexAcquire(void *, void * = nullptr) {}
++ inline void futexRelease(void *, void * = nullptr) {}
++ inline void latchCountDown(void *) {}
++ inline void latchWait(const void *) {}
++
++ enum : unsigned {
++ MutexWriteReentrant,
++ TryLock,
++ TryLockFailed,
++ ReadLock,
++ };
++ inline void mutexPreLock(void *, unsigned) {}
++ inline void mutexPostLock(void *, unsigned, int) {}
++ inline void mutexPreUnlock(void *, unsigned) {}
++ inline void mutexPostUnlock(void *, unsigned) {}
++ #endif // QT_BUILDING_UNDER_TSAN
++ } // namespace QtTsan
++
++ QT_END_NAMESPACE
++
++ #endif // QTSAN_IMPL_H