test/tsan/simple_race.c

   1 // RUN: %clang_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <unistd.h>
   5
   6 int Global;
   7
   8 void *Thread1(void *x) {
   9   sleep(1);
  10   Global = 42;
  11   return NULL;
  12 }
  13
  14 void *Thread2(void *x) {
  15   Global = 43;
  16   return NULL;
  17 }
  18
  19 int main() {
  20   pthread_t t[2];
  21   pthread_create(&t[0], NULL, Thread1, NULL);
  22   pthread_create(&t[1], NULL, Thread2, NULL);
  23   pthread_join(t[0], NULL);
  24   pthread_join(t[1], NULL);
  25   return 0;
  26 }
  27
  28 // CHECK: WARNING: ThreadSanitizer: data race