gcc/testsuite/c-c++-common/tsan/sleep_sync.c

   1 /* { dg-shouldfail "tsan" } */
   2 /* { dg-additional-options "-ldl" } */
   3
   4 #include <pthread.h>
   5 #include <unistd.h>
   6 #include "tsan_barrier.h"
   7
   8 static pthread_barrier_t barrier;
   9 int X = 0;
  10
  11 void MySleep() {
  12   sleep(1);
  13 }
  14
  15 void *Thread(void *p) {
  16   barrier_wait(&barrier);
  17   MySleep();  // Assume the main thread has done the write.
  18   X = 42;
  19   return 0;
  20 }
  21
  22 int main() {
  23   barrier_init(&barrier, 2);
  24   pthread_t t;
  25   pthread_create(&t, 0, Thread, 0);
  26   X = 43;
  27   barrier_wait(&barrier);
  28   pthread_join(t, 0);
  29   return 0;
  30 }
  31
  32 /* { dg-output "WARNING: ThreadSanitizer: data race.*(\n|\r\n|\r).*} */
  33 /* { dg-output "  As if synchronized via sleep:(\n|\r\n|\r)} */
  34 /* { dg-output "         #0 sleep.*"*} */
  35 /* { dg-output "         #1 MySleep.*"*} */
  36 /* { dg-output "         #2 Thread.*"*} */