1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2// CHECK-NOT: unlock of unlocked mutex
3// CHECK: ThreadSanitizer: data race
4// CHECK: pthread_cond_signal
5
6#include "test.h"
7
8struct Ctx {
9  pthread_mutex_t m;
10  pthread_cond_t c;
11  bool done;
12};
13
14void *thr(void *p) {
15  Ctx *c = (Ctx*)p;
16  pthread_mutex_lock(&c->m);
17  c->done = true;
18  pthread_mutex_unlock(&c->m);
19  pthread_cond_signal(&c->c);
20  barrier_wait(&barrier);
21  return 0;
22}
23
24int main() {
25  barrier_init(&barrier, 2);
26  Ctx *c = new Ctx();
27  pthread_mutex_init(&c->m, 0);
28  pthread_cond_init(&c->c, 0);
29  pthread_t th;
30  pthread_create(&th, 0, thr, c);
31  pthread_mutex_lock(&c->m);
32  while (!c->done)
33    pthread_cond_wait(&c->c, &c->m);
34  pthread_mutex_unlock(&c->m);
35  // otherwise it can be reported as use-after-free
36  barrier_wait(&barrier);
37  delete c;
38  pthread_join(th, 0);
39}
40