src/compiler-rt/test/tsan/atomic_stack.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "test.h"
   3
   4 int Global;
   5
   6 void *Thread1(void *x) {
   7   barrier_wait(&barrier);
   8   __atomic_fetch_add(&Global, 1, __ATOMIC_RELAXED);
   9   return NULL;
  10 }
  11
  12 void *Thread2(void *x) {
  13   Global++;
  14   barrier_wait(&barrier);
  15   return NULL;
  16 }
  17
  18 int main() {
  19   barrier_init(&barrier, 2);
  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 }
  26
  27 // CHECK: WARNING: ThreadSanitizer: data race
  28 // CHECK:   Atomic write of size 4
  29 // CHECK:     #0 __tsan_atomic32_fetch_add
  30 // CHECK:     #1 Thread1