1 // RUN: %clang_tsan %s -o %t -framework Foundation
2 // RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s
4 #import <Foundation/Foundation.h>
8 static const long kNumThreads = 4;
13 static dispatch_once_t once_token;
14 static dispatch_once_t once_token2;
21 void *Thread(void *a) {
22 barrier_wait(&barrier);
24 dispatch_once(&once_token, ^{
30 dispatch_once_f(&once_token2, NULL, f);
33 fprintf(stderr, "global = %ld\n", x);
34 fprintf(stderr, "global2 = %ld\n", x2);
39 fprintf(stderr, "Hello world.\n");
40 barrier_init(&barrier, kNumThreads);
42 pthread_t t[kNumThreads];
43 for (int i = 0; i < kNumThreads; i++) {
44 pthread_create(&t[i], 0, Thread, 0);
46 for (int i = 0; i < kNumThreads; i++) {
47 pthread_join(t[i], 0);
50 fprintf(stderr, "Done.\n");
53 // CHECK: Hello world.
55 // CHECK-NOT: WARNING: ThreadSanitizer