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//===-- scudo_tsd_exclusive.inc ---------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// Scudo exclusive TSD fastpath functions implementation.
///
//===----------------------------------------------------------------------===//
#ifndef SCUDO_TSD_H_
#error "This file must be included inside scudo_tsd.h."
#endif // SCUDO_TSD_H_
#if SCUDO_TSD_EXCLUSIVE
enum ThreadState : u8 {
ThreadNotInitialized = 0,
ThreadInitialized,
ThreadTornDown,
};
__attribute__((
tls_model("initial-exec"))) extern THREADLOCAL ThreadState ScudoThreadState;
__attribute__((tls_model("initial-exec"))) extern THREADLOCAL ScudoTSD TSD;
extern ScudoTSD FallbackTSD;
ALWAYS_INLINE void initThreadMaybe(bool MinimalInit = false) {
if (LIKELY(ScudoThreadState != ThreadNotInitialized))
return;
initThread(MinimalInit);
}
ALWAYS_INLINE ScudoTSD *
getTSDAndLock(bool *UnlockRequired) NO_THREAD_SAFETY_ANALYSIS {
if (UNLIKELY(ScudoThreadState != ThreadInitialized)) {
FallbackTSD.lock();
*UnlockRequired = true;
return &FallbackTSD;
}
*UnlockRequired = false;
return &TSD;
}
#endif // SCUDO_TSD_EXCLUSIVE
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