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
56
57
58
59
60
61
62
63
64
65
66
|
//===-- scudo_tsd.h ---------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// Scudo thread specific data definition.
/// Implementation will differ based on the thread local storage primitives
/// offered by the underlying platform.
///
//===----------------------------------------------------------------------===//
#ifndef SCUDO_TSD_H_
#define SCUDO_TSD_H_
#include "scudo_allocator.h"
#include "scudo_utils.h"
#include <pthread.h>
namespace __scudo {
struct ALIGNED(SANITIZER_CACHE_LINE_SIZE) ScudoTSD {
AllocatorCacheT Cache;
uptr QuarantineCachePlaceHolder[4];
void init();
void commitBack();
INLINE bool tryLock() {
if (Mutex.TryLock()) {
atomic_store_relaxed(&Precedence, 0);
return true;
}
if (atomic_load_relaxed(&Precedence) == 0)
atomic_store_relaxed(&Precedence, static_cast<uptr>(
MonotonicNanoTime() >> FIRST_32_SECOND_64(16, 0)));
return false;
}
INLINE void lock() {
atomic_store_relaxed(&Precedence, 0);
Mutex.Lock();
}
INLINE void unlock() { Mutex.Unlock(); }
INLINE uptr getPrecedence() { return atomic_load_relaxed(&Precedence); }
private:
StaticSpinMutex Mutex;
atomic_uintptr_t Precedence;
};
void initThread(bool MinimalInit);
// TSD model specific fastpath functions definitions.
#include "scudo_tsd_exclusive.inc"
#include "scudo_tsd_shared.inc"
} // namespace __scudo
#endif // SCUDO_TSD_H_
|
