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      1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
      2 #include "test.h"
      3 
      4 void *thr(void *arg) {
      5   // Create a sync object on stack, so there is something to free on thread end.
      6   volatile int x;
      7   __atomic_fetch_add(&x, 1, __ATOMIC_SEQ_CST);
      8   barrier_wait(&barrier);
      9   return 0;
     10 }
     11 
     12 int main() {
     13   const int kThreads = 10;
     14   barrier_init(&barrier, kThreads + 1);
     15   pthread_t t[kThreads];
     16   pthread_attr_t attr;
     17   pthread_attr_init(&attr);
     18   pthread_attr_setstacksize(&attr, 16 << 20);
     19   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
     20   for (int i = 0; i < kThreads; i++)
     21     pthread_create(&t[i], &attr, thr, 0);
     22   pthread_attr_destroy(&attr);
     23   barrier_wait(&barrier);
     24   sleep(1);
     25   fprintf(stderr, "DONE\n");
     26   return 0;
     27 }
     28 
     29 // CHECK: DONE
     30 
     31