mutexset3.cpp
1.27 KB
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
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include "test.h"
int Global;
pthread_mutex_t mtx1;
pthread_mutex_t mtx2;
void *Thread1(void *x) {
barrier_wait(&barrier);
pthread_mutex_lock(&mtx1);
pthread_mutex_lock(&mtx2);
Global++;
pthread_mutex_unlock(&mtx2);
pthread_mutex_unlock(&mtx1);
return NULL;
}
void *Thread2(void *x) {
Global--;
barrier_wait(&barrier);
return NULL;
}
int main() {
barrier_init(&barrier, 2);
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 4 at {{.*}} by thread T1
// CHECK: (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]):
// CHECK: Previous write of size 4 at {{.*}} by thread T2:
// CHECK: Mutex [[M1]] (0x{{.*}}) created at:
// CHECK: #0 pthread_mutex_init
// CHECK: #1 main {{.*}}mutexset3.cpp:[[@LINE+4]]
// CHECK: Mutex [[M2]] (0x{{.*}}) created at:
// CHECK: #0 pthread_mutex_init
// CHECK: #1 main {{.*}}mutexset3.cpp:[[@LINE+2]]
pthread_mutex_init(&mtx1, 0);
pthread_mutex_init(&mtx2, 0);
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
pthread_mutex_destroy(&mtx1);
pthread_mutex_destroy(&mtx2);
}