1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3
4 int Global;
5 pthread_mutex_t mtx1;
6 pthread_mutex_t mtx2;
7 pthread_rwlock_t mtx3;
8
Thread1(void * x)9 void *Thread1(void *x) {
10 barrier_wait(&barrier);
11 pthread_mutex_lock(&mtx1);
12 Global++;
13 pthread_mutex_unlock(&mtx1);
14 return NULL;
15 }
16
Thread2(void * x)17 void *Thread2(void *x) {
18 pthread_mutex_lock(&mtx1);
19 pthread_mutex_unlock(&mtx1);
20 pthread_mutex_lock(&mtx2);
21 pthread_rwlock_rdlock(&mtx3);
22 Global--;
23 pthread_mutex_unlock(&mtx2);
24 pthread_rwlock_unlock(&mtx3);
25 barrier_wait(&barrier);
26 return NULL;
27 }
28
main()29 int main() {
30 barrier_init(&barrier, 2);
31 // CHECK: WARNING: ThreadSanitizer: data race
32 // CHECK: Write of size 4 at {{.*}} by thread T1
33 // CHECK: (mutexes: write [[M1:M[0-9]+]]):
34 // CHECK: Previous write of size 4 at {{.*}} by thread T2
35 // CHECK: (mutexes: write [[M2:M[0-9]+]], read [[M3:M[0-9]+]]):
36 // CHECK: Mutex [[M1]] (0x{{.*}}) created at:
37 // CHECK: #1 main {{.*}}mutexset6.cpp:[[@LINE+5]]
38 // CHECK: Mutex [[M2]] (0x{{.*}}) created at:
39 // CHECK: #1 main {{.*}}mutexset6.cpp:[[@LINE+4]]
40 // CHECK: Mutex [[M3]] (0x{{.*}}) created at:
41 // CHECK: #1 main {{.*}}mutexset6.cpp:[[@LINE+3]]
42 pthread_mutex_init(&mtx1, 0);
43 pthread_mutex_init(&mtx2, 0);
44 pthread_rwlock_init(&mtx3, 0);
45 pthread_t t[2];
46 pthread_create(&t[0], NULL, Thread1, NULL);
47 pthread_create(&t[1], NULL, Thread2, NULL);
48 pthread_join(t[0], NULL);
49 pthread_join(t[1], NULL);
50 pthread_mutex_destroy(&mtx1);
51 pthread_mutex_destroy(&mtx2);
52 pthread_rwlock_destroy(&mtx3);
53 }
54