compiler-rt/test/tsan/race_on_barrier.c

   1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2
   3 // pthread barriers are not available on OS X
   4 // UNSUPPORTED: darwin
   5
   6 #include "test.h"
   7
   8 pthread_barrier_t B;
   9 int Global;
  10
  11 void *Thread1(void *x) {
  12   pthread_barrier_init(&B, 0, 2);
  13   barrier_wait(&barrier);
  14   pthread_barrier_wait(&B);
  15   return NULL;
  16 }
  17
  18 void *Thread2(void *x) {
  19   barrier_wait(&barrier);
  20   pthread_barrier_wait(&B);
  21   return NULL;
  22 }
  23
  24 int main() {
  25   barrier_init(&barrier, 2);
  26   pthread_t t;
  27   pthread_create(&t, NULL, Thread1, NULL);
  28   Thread2(0);
  29   pthread_join(t, NULL);
  30   pthread_barrier_destroy(&B);
  31   return 0;
  32 }
  33
  34 // CHECK:      WARNING: ThreadSanitizer: data race