llvm-project

1
// RUN: echo "race_top:TopFunction" > %t.supp
2
// RUN: %clangxx_tsan -O1 %s -o %t
3
// RUN: %env_tsan_opts=suppressions='%t.supp' %run %t 2>&1 | FileCheck %s
4
// RUN: rm %t.supp
5
#include "test.h"
6

7
int Global;
8

9
__attribute__((noinline)) void TopFunction(int *p) {
10
  *p = 1;
11
}
12

13
void *Thread(void *x) {
14
  barrier_wait(&barrier);
15
  TopFunction(&Global);
16
  return 0;
17
}
18

19
int main() {
20
  barrier_init(&barrier, 2);
21
  pthread_t t;
22
  pthread_create(&t, 0, Thread, 0);
23
  Global--;
24
  barrier_wait(&barrier);
25
  pthread_join(t, 0);
26
  fprintf(stderr, "DONE\n");
27
}
28

29
// CHECK-NOT: WARNING: ThreadSanitizer: data race
30