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      1 // RUN: echo "race_top:TopFunction" > %t.supp
      2 // RUN: %clangxx_tsan -O1 %s -o %t
      3 // RUN: %env_tsan_opts=suppressions='%t.supp' %run %t 2>&1 | FileCheck %s
      4 // RUN: rm %t.supp
      5 #include "test.h"
      6 
      7 int Global;
      8 
      9 void TopFunction(int *p) {
     10   *p = 1;
     11 }
     12 
     13 void *Thread(void *x) {
     14   barrier_wait(&barrier);
     15   TopFunction(&Global);
     16   return 0;
     17 }
     18 
     19 int main() {
     20   barrier_init(&barrier, 2);
     21   pthread_t t;
     22   pthread_create(&t, 0, Thread, 0);
     23   Global--;
     24   barrier_wait(&barrier);
     25   pthread_join(t, 0);
     26   fprintf(stderr, "DONE\n");
     27 }
     28 
     29 // CHECK-NOT: WARNING: ThreadSanitizer: data race
     30