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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
//===-- sanitizer_mutex_test.cpp ------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_common/sanitizer_mutex.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_pthread_wrappers.h"
#include "gtest/gtest.h"
#include <string.h>
namespace __sanitizer {
template<typename MutexType>
class TestData {
public:
explicit TestData(MutexType *mtx)
: mtx_(mtx) {
for (int i = 0; i < kSize; i++)
data_[i] = 0;
}
void Write() {
Lock l(mtx_);
T v0 = data_[0];
for (int i = 0; i < kSize; i++) {
CHECK_EQ(data_[i], v0);
data_[i]++;
}
}
void TryWrite() {
if (!mtx_->TryLock())
return;
T v0 = data_[0];
for (int i = 0; i < kSize; i++) {
CHECK_EQ(data_[i], v0);
data_[i]++;
}
mtx_->Unlock();
}
void Backoff() {
volatile T data[kSize] = {};
for (int i = 0; i < kSize; i++) {
data[i]++;
CHECK_EQ(data[i], 1);
}
}
private:
typedef GenericScopedLock<MutexType> Lock;
static const int kSize = 64;
typedef u64 T;
MutexType *mtx_;
char pad_[kCacheLineSize];
T data_[kSize];
};
const int kThreads = 8;
#if SANITIZER_DEBUG
const int kIters = 16*1024;
#else
const int kIters = 64*1024;
#endif
template<typename MutexType>
static void *lock_thread(void *param) {
TestData<MutexType> *data = (TestData<MutexType>*)param;
for (int i = 0; i < kIters; i++) {
data->Write();
data->Backoff();
}
return 0;
}
template<typename MutexType>
static void *try_thread(void *param) {
TestData<MutexType> *data = (TestData<MutexType>*)param;
for (int i = 0; i < kIters; i++) {
data->TryWrite();
data->Backoff();
}
return 0;
}
template<typename MutexType>
static void check_locked(MutexType *mtx) {
GenericScopedLock<MutexType> l(mtx);
mtx->CheckLocked();
}
TEST(SanitizerCommon, SpinMutex) {
SpinMutex mtx;
mtx.Init();
TestData<SpinMutex> data(&mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, lock_thread<SpinMutex>, &data);
for (int i = 0; i < kThreads; i++)
PTHREAD_JOIN(threads[i], 0);
}
TEST(SanitizerCommon, SpinMutexTry) {
SpinMutex mtx;
mtx.Init();
TestData<SpinMutex> data(&mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, try_thread<SpinMutex>, &data);
for (int i = 0; i < kThreads; i++)
PTHREAD_JOIN(threads[i], 0);
}
TEST(SanitizerCommon, BlockingMutex) {
u64 mtxmem[1024] = {};
BlockingMutex *mtx = new(mtxmem) BlockingMutex(LINKER_INITIALIZED);
TestData<BlockingMutex> data(mtx);
pthread_t threads[kThreads];
for (int i = 0; i < kThreads; i++)
PTHREAD_CREATE(&threads[i], 0, lock_thread<BlockingMutex>, &data);
for (int i = 0; i < kThreads; i++)
PTHREAD_JOIN(threads[i], 0);
check_locked(mtx);
}
} // namespace __sanitizer
|
