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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 
Thread1(void * x)8 void *Thread1(void *x) {
9   barrier_wait(&barrier);
10   pthread_mutex_lock(&mtx1);
11   Global++;
12   pthread_mutex_unlock(&mtx1);
13   return NULL;
14 }
15 
Thread2(void * x)16 void *Thread2(void *x) {
17   pthread_mutex_lock(&mtx2);
18   Global--;
19   pthread_mutex_unlock(&mtx2);
20   barrier_wait(&barrier);
21   return NULL;
22 }
23 
main()24 int main() {
25   barrier_init(&barrier, 2);
26   // CHECK: WARNING: ThreadSanitizer: data race
27   // CHECK:   Write of size 4 at {{.*}} by thread T1
28   // CHECK:                              (mutexes: write [[M1:M[0-9]+]]):
29   // CHECK:   Previous write of size 4 at {{.*}} by thread T2
30   // CHECK:                              (mutexes: write [[M2:M[0-9]+]]):
31   // CHECK:   Mutex [[M1]] (0x{{.*}}) created at:
32   // CHECK:     #0 pthread_mutex_init
33   // CHECK:     #1 main {{.*}}mutexset5.cc:[[@LINE+4]]
34   // CHECK:   Mutex [[M2]] (0x{{.*}}) created at:
35   // CHECK:     #0 pthread_mutex_init
36   // CHECK:     #1 main {{.*}}mutexset5.cc:[[@LINE+5]]
37   pthread_mutex_init(&mtx1, 0);
38   pthread_mutex_init(&mtx2, 0);
39   pthread_t t[2];
40   pthread_create(&t[0], NULL, Thread1, NULL);
41   pthread_create(&t[1], NULL, Thread2, NULL);
42   pthread_join(t[0], NULL);
43   pthread_join(t[1], NULL);
44   pthread_mutex_destroy(&mtx1);
45   pthread_mutex_destroy(&mtx2);
46 }
47