1 // RUN: %clang_tsan -O1 %s -lpthread -o %t && %deflake %run %t | FileCheck %s
2 // Regression test for
3 // https://github.com/google/sanitizers/issues/468
4 // When the data race was reported, pthread_atfork() handler used to be
5 // executed which caused another race report in the same thread, which resulted
6 // in a deadlock.
7 #include "test.h"
8 
9 int glob = 0;
10 
11 void *worker(void *unused) {
12   barrier_wait(&barrier);
13   glob++;
14   return NULL;
15 }
16 
17 void atfork() {
18   fprintf(stderr, "ATFORK\n");
19   glob++;
20 }
21 
22 int main() {
23   barrier_init(&barrier, 2);
24   pthread_atfork(atfork, NULL, NULL);
25   pthread_t t;
26   pthread_create(&t, NULL, worker, NULL);
27   glob++;
28   barrier_wait(&barrier);
29   pthread_join(t, NULL);
30   // CHECK: ThreadSanitizer: data race
31   // CHECK-NOT: ATFORK
32   return 0;
33 }
34