Pirama Arumuga Nainar | 799172d | 2016-03-03 15:50:30 -0800 | [diff] [blame^] | 1 | // RUN: %clang_tsan %s -o %t -framework Foundation |
| 2 | // RUN: %run %t 2>&1 |
| 3 | |
| 4 | #import <Foundation/Foundation.h> |
| 5 | |
| 6 | #import "../test.h" |
| 7 | |
| 8 | static const long kNumThreads = 4; |
| 9 | |
| 10 | long global; |
| 11 | long global2; |
| 12 | |
| 13 | static dispatch_once_t once_token; |
| 14 | static dispatch_once_t once_token2; |
| 15 | |
| 16 | void f(void *) { |
| 17 | global2 = 42; |
| 18 | usleep(100000); |
| 19 | } |
| 20 | |
| 21 | void *Thread(void *a) { |
| 22 | barrier_wait(&barrier); |
| 23 | |
| 24 | dispatch_once(&once_token, ^{ |
| 25 | global = 42; |
| 26 | usleep(100000); |
| 27 | }); |
| 28 | long x = global; |
| 29 | |
| 30 | dispatch_once_f(&once_token2, NULL, f); |
| 31 | long x2 = global2; |
| 32 | |
| 33 | fprintf(stderr, "global = %ld\n", x); |
| 34 | fprintf(stderr, "global2 = %ld\n", x2); |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | int main() { |
| 39 | fprintf(stderr, "Hello world.\n"); |
| 40 | barrier_init(&barrier, kNumThreads); |
| 41 | |
| 42 | pthread_t t[kNumThreads]; |
| 43 | for (int i = 0; i < kNumThreads; i++) { |
| 44 | pthread_create(&t[i], 0, Thread, 0); |
| 45 | } |
| 46 | for (int i = 0; i < kNumThreads; i++) { |
| 47 | pthread_join(t[i], 0); |
| 48 | } |
| 49 | |
| 50 | fprintf(stderr, "Done.\n"); |
| 51 | } |
| 52 | |
| 53 | // CHECK: Hello world. |
| 54 | // CHECK: Done. |
| 55 | // CHECK-NOT: WARNING: ThreadSanitizer |