text: // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
  #include "test.h"
  
  #if defined(__FreeBSD__)
  #include <pthread_np.h>
  #define pthread_setname_np pthread_set_name_np
  #endif
  
  long long Global;
  
  void *Thread1(void *x) {
    barrier_wait(&barrier);
    Global++;
    return 0;
  }
  
  void *Thread2(void *x) {
    pthread_setname_np(pthread_self(), "foobar2");
    Global--;
    barrier_wait(&barrier);
    return 0;
  }
  
  int main() {
    barrier_init(&barrier, 3);
    pthread_t t[2];
    pthread_create(&t[0], 0, Thread1, 0);
    pthread_create(&t[1], 0, Thread2, 0);
    pthread_setname_np(t[0], "foobar1");
    barrier_wait(&barrier);
    pthread_join(t[0], NULL);
    pthread_join(t[1], NULL);
  }
  
  // CHECK: WARNING: ThreadSanitizer: data race
  // CHECK:   Thread T1 'foobar1'
  // CHECK:   Thread T2 'foobar2'
  