compiler-rt/test/tsan/race_on_fputs.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "test.h"
   3
   4 char s[] = "abracadabra";
   5
   6 void *Thread0(void *p) {
   7   fputs(s, stdout);
   8   barrier_wait(&barrier);
   9   return 0;
  10 }
  11
  12 void *Thread1(void *p) {
  13   barrier_wait(&barrier);
  14   s[3] = 'z';
  15   return 0;
  16 }
  17
  18 int main() {
  19   barrier_init(&barrier, 2);
  20   pthread_t th[2];
  21   pthread_create(&th[0], 0, Thread0, 0);
  22   pthread_create(&th[1], 0, Thread1, 0);
  23   pthread_join(th[0], 0);
  24   pthread_join(th[1], 0);
  25   fprintf(stderr, "DONE");
  26 }
  27
  28 // CHECK: WARNING: ThreadSanitizer: data race
  29 // CHECK: DONE