1// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2
3#include <stdio.h>
4#include <stdlib.h>
5
6int n;
7const int N = 10000;
8
9static void atexit1() {
10 n++;
11}
12
13static void atexit0() {
14 fprintf(stderr, "run count: %d\n", n);
15}
16
17int main() {
18 atexit(atexit0);
19 for (int i = 0; i < N; i++)
20 atexit(atexit1);
21}
22
23// CHECK-NOT: FATAL: ThreadSanitizer
24// CHECK-NOT: WARNING: ThreadSanitizer
25// CHECK: run count: 10000
26
27