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1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2 #include <pthread.h>
3 #include <stdlib.h>
4 #include <stdio.h>
5 
6 struct Cache {
7   int x;
CacheCache8   explicit Cache(int x)
9     : x(x) {
10   }
11 };
12 
foo(Cache * my)13 void foo(Cache *my) {
14   static Cache *c = my ? my : new Cache(rand());
15   if (c->x >= RAND_MAX)
16     exit(1);
17 }
18 
Thread(void * x)19 void *Thread(void *x) {
20   foo(new Cache(rand()));
21   return 0;
22 }
23 
main()24 int main() {
25   pthread_t t[2];
26   pthread_create(&t[0], 0, Thread, 0);
27   pthread_create(&t[1], 0, Thread, 0);
28   pthread_join(t[0], 0);
29   pthread_join(t[1], 0);
30   fprintf(stderr, "PASS\n");
31 }
32 
33 // CHECK-NOT: WARNING: ThreadSanitizer: data race
34