1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2 #include <pthread.h>
3 #include <stdio.h>
4 #include <unistd.h>
5 
6 int pipes[2];
7 
Thread(void * x)8 void *Thread(void *x) {
9   // wait for shutown signal
10   while (read(pipes[0], &x, 1) != 1) {
11   }
12   close(pipes[0]);
13   close(pipes[1]);
14   return 0;
15 }
16 
main()17 int main() {
18   if (pipe(pipes))
19     return 1;
20   pthread_t t;
21   pthread_create(&t, 0, Thread, 0);
22   // send shutdown signal
23   while (write(pipes[1], &t, 1) != 1) {
24   }
25   pthread_join(t, 0);
26   fprintf(stderr, "OK\n");
27 }
28 
29 // CHECK-NOT: WARNING: ThreadSanitizer: data race
30 // CHECK: OK
31