1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
2 #include "test.h"
3 
Thread2(void * a)4 void *Thread2(void *a) {
5   barrier_wait(&barrier);
6   *(int*)a = 43;
7   return 0;
8 }
9 
Thread(void * a)10 void *Thread(void *a) {
11   static __thread int Var = 42;
12   pthread_t t;
13   pthread_create(&t, 0, Thread2, &Var);
14   Var = 42;
15   barrier_wait(&barrier);
16   pthread_join(t, 0);
17   return 0;
18 }
19 
main()20 int main() {
21   barrier_init(&barrier, 2);
22   pthread_t t;
23   pthread_create(&t, 0, Thread, 0);
24   pthread_join(t, 0);
25 }
26 
27 // CHECK: WARNING: ThreadSanitizer: data race
28 // CHECK-Linux:   Location is TLS of thread T1.
29 // CHECK-FreeBSD:   Location is TLS of thread T1.
30 // CHECK-Darwin:   Location is heap block of size 4
31