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