1 // RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2 #include "custom_mutex.h"
3 
4 // Test that Broadcast does not induce parasitic synchronization.
5 
6 Mutex mu(true, 0);
7 long data;
8 
9 void *thr(void *arg) {
10   barrier_wait(&barrier);
11   mu.Lock();
12   data++;
13   mu.Unlock();
14   data++;
15   mu.Broadcast();
16   return 0;
17 }
18 
19 int main() {
20   barrier_init(&barrier, 2);
21   pthread_t th;
22   pthread_create(&th, 0, thr, 0);
23   mu.Lock();
24   barrier_wait(&barrier);
25   while (data == 0)
26     mu.Wait();
27   mu.Unlock();
28   pthread_join(th, 0);
29   fprintf(stderr, "DONE\n");
30   return 0;
31 }
32 
33 // CHECK: ThreadSanitizer: data race
34 // CHECK: DONE
35