1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
| //===-- scudo_tsd_shared.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 shared 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
extern pthread_key_t PThreadKey;
#if SANITIZER_LINUX && !SANITIZER_ANDROID
__attribute__((tls_model("initial-exec")))
extern THREADLOCAL ScudoTSD *CurrentTSD;
#endif
ALWAYS_INLINE ScudoTSD* getCurrentTSD() {
#if SANITIZER_ANDROID
return reinterpret_cast<ScudoTSD *>(*get_android_tls_ptr());
#elif SANITIZER_LINUX
return CurrentTSD;
#else
return reinterpret_cast<ScudoTSD *>(pthread_getspecific(PThreadKey));
#endif // SANITIZER_ANDROID
}
ALWAYS_INLINE void initThreadMaybe(bool MinimalInit = false) {
if (LIKELY(getCurrentTSD()))
return;
initThread(MinimalInit);
}
ScudoTSD *getTSDAndLockSlow(ScudoTSD *TSD);
ALWAYS_INLINE ScudoTSD *getTSDAndLock(bool *UnlockRequired) {
ScudoTSD *TSD = getCurrentTSD();
DCHECK(TSD && "No TSD associated with the current thread!");
*UnlockRequired = true;
// Try to lock the currently associated context.
if (TSD->tryLock())
return TSD;
// If it failed, go the slow path.
return getTSDAndLockSlow(TSD);
}
#endif // !SCUDO_TSD_EXCLUSIVE
|