1// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
2#include <pthread.h>
3#include <stdio.h>
4#include <unistd.h>
5
6int Global;
7pthread_mutex_t mtx1;
8pthread_mutex_t mtx2;
9
10void *Thread1(void *x) {
11  pthread_mutex_lock(&mtx1);
12  pthread_mutex_lock(&mtx2);
13  Global++;
14  pthread_mutex_unlock(&mtx2);
15  pthread_mutex_unlock(&mtx1);
16  return NULL;
17}
18
19void *Thread2(void *x) {
20  sleep(1);
21  Global--;
22  return NULL;
23}
24
25int main() {
26  // CHECK: WARNING: ThreadSanitizer: data race
27  // CHECK:   Write of size 4 at {{.*}} by thread T2:
28  // CHECK:   Previous write of size 4 at {{.*}} by thread T1
29  // CHECK:                 (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]):
30  // CHECK:   Mutex [[M1]] created at:
31  // CHECK:     #0 pthread_mutex_init
32  // CHECK:     #1 main {{.*}}/mutexset4.cc:[[@LINE+4]]
33  // CHECK:   Mutex [[M2]] created at:
34  // CHECK:     #0 pthread_mutex_init
35  // CHECK:     #1 main {{.*}}/mutexset4.cc:[[@LINE+2]]
36  pthread_mutex_init(&mtx1, 0);
37  pthread_mutex_init(&mtx2, 0);
38  pthread_t t[2];
39  pthread_create(&t[0], NULL, Thread1, NULL);
40  pthread_create(&t[1], NULL, Thread2, NULL);
41  pthread_join(t[0], NULL);
42  pthread_join(t[1], NULL);
43  pthread_mutex_destroy(&mtx1);
44  pthread_mutex_destroy(&mtx2);
45}
46