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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
| //===-- tsan_posix.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 (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include "tsan_interface.h"
#include "tsan_posix_util.h"
#include "tsan_test_util.h"
#include "gtest/gtest.h"
#include <pthread.h>
struct thread_key {
pthread_key_t key;
pthread_mutex_t *mtx;
int val;
int *cnt;
thread_key(pthread_key_t key, pthread_mutex_t *mtx, int val, int *cnt)
: key(key)
, mtx(mtx)
, val(val)
, cnt(cnt) {
}
};
static void thread_secific_dtor(void *v) {
thread_key *k = (thread_key *)v;
EXPECT_EQ(__interceptor_pthread_mutex_lock(k->mtx), 0);
(*k->cnt)++;
__tsan_write4(&k->cnt);
EXPECT_EQ(__interceptor_pthread_mutex_unlock(k->mtx), 0);
if (k->val == 42) {
// Okay.
} else if (k->val == 43 || k->val == 44) {
k->val--;
EXPECT_EQ(pthread_setspecific(k->key, k), 0);
} else {
ASSERT_TRUE(false);
}
}
static void *dtors_thread(void *p) {
thread_key *k = (thread_key *)p;
EXPECT_EQ(pthread_setspecific(k->key, k), 0);
return 0;
}
TEST(Posix, ThreadSpecificDtors) {
int cnt = 0;
pthread_key_t key;
EXPECT_EQ(pthread_key_create(&key, thread_secific_dtor), 0);
pthread_mutex_t mtx;
EXPECT_EQ(__interceptor_pthread_mutex_init(&mtx, 0), 0);
pthread_t th[3];
thread_key k1 = thread_key(key, &mtx, 42, &cnt);
thread_key k2 = thread_key(key, &mtx, 43, &cnt);
thread_key k3 = thread_key(key, &mtx, 44, &cnt);
EXPECT_EQ(__interceptor_pthread_create(&th[0], 0, dtors_thread, &k1), 0);
EXPECT_EQ(__interceptor_pthread_create(&th[1], 0, dtors_thread, &k2), 0);
EXPECT_EQ(__interceptor_pthread_join(th[0], 0), 0);
EXPECT_EQ(__interceptor_pthread_create(&th[2], 0, dtors_thread, &k3), 0);
EXPECT_EQ(__interceptor_pthread_join(th[1], 0), 0);
EXPECT_EQ(__interceptor_pthread_join(th[2], 0), 0);
EXPECT_EQ(pthread_key_delete(key), 0);
EXPECT_EQ(6, cnt);
}
#if !defined(__aarch64__) && !defined(__APPLE__)
static __thread int local_var;
static void *local_thread(void *p) {
__tsan_write1(&local_var);
__tsan_write1(&p);
if (p == 0)
return 0;
const int kThreads = 4;
pthread_t th[kThreads];
for (int i = 0; i < kThreads; i++)
EXPECT_EQ(__interceptor_pthread_create(&th[i], 0, local_thread,
(void *)((long)p - 1)),
0);
for (int i = 0; i < kThreads; i++)
EXPECT_EQ(__interceptor_pthread_join(th[i], 0), 0);
return 0;
}
#endif
TEST(Posix, ThreadLocalAccesses) {
// The test is failing with high thread count for aarch64.
// FIXME: track down the issue and re-enable the test.
// On Darwin, we're running unit tests without interceptors and __thread is
// using malloc and free, which causes false data race reports. On rare
// occasions on powerpc64le this test also fails.
#if !defined(__aarch64__) && !defined(__APPLE__) && !defined(powerpc64le)
local_thread((void*)2);
#endif
}
struct CondContext {
pthread_mutex_t m;
pthread_cond_t c;
int data;
};
static void *cond_thread(void *p) {
CondContext &ctx = *static_cast<CondContext*>(p);
EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
EXPECT_EQ(ctx.data, 0);
ctx.data = 1;
EXPECT_EQ(__interceptor_pthread_cond_signal(&ctx.c), 0);
EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
while (ctx.data != 2)
EXPECT_EQ(__interceptor_pthread_cond_wait(&ctx.c, &ctx.m), 0);
EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
ctx.data = 3;
EXPECT_EQ(pthread_cond_broadcast(&ctx.c), 0);
EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
return 0;
}
TEST(Posix, CondBasic) {
CondContext ctx;
EXPECT_EQ(__interceptor_pthread_mutex_init(&ctx.m, 0), 0);
EXPECT_EQ(__interceptor_pthread_cond_init(&ctx.c, 0), 0);
ctx.data = 0;
pthread_t th;
EXPECT_EQ(__interceptor_pthread_create(&th, 0, cond_thread, &ctx), 0);
EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
while (ctx.data != 1)
EXPECT_EQ(__interceptor_pthread_cond_wait(&ctx.c, &ctx.m), 0);
ctx.data = 2;
EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
EXPECT_EQ(pthread_cond_broadcast(&ctx.c), 0);
EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
while (ctx.data != 3)
EXPECT_EQ(__interceptor_pthread_cond_wait(&ctx.c, &ctx.m), 0);
EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
EXPECT_EQ(__interceptor_pthread_join(th, 0), 0);
EXPECT_EQ(__interceptor_pthread_cond_destroy(&ctx.c), 0);
EXPECT_EQ(__interceptor_pthread_mutex_destroy(&ctx.m), 0);
}
|