| // RUN: %clang_tsan %s -o %t |
| // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer' |
| |
| #include <dispatch/dispatch.h> |
| |
| #include <stdio.h> |
| |
| void notify_callback(void *context) { |
| // Do nothing. |
| } |
| |
| int main() { |
| fprintf(stderr, "Hello world."); |
| |
| dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); |
| |
| for (int i = 0; i < 300000; i++) { |
| dispatch_group_t g = dispatch_group_create(); |
| dispatch_group_enter(g); |
| dispatch_async(q, ^{ |
| dispatch_group_leave(g); |
| }); |
| dispatch_group_notify(g, q, ^{ |
| // Do nothing. |
| }); |
| dispatch_release(g); |
| } |
| |
| for (int i = 0; i < 300000; i++) { |
| dispatch_group_t g = dispatch_group_create(); |
| dispatch_group_enter(g); |
| dispatch_async(q, ^{ |
| dispatch_group_leave(g); |
| }); |
| dispatch_group_notify_f(g, q, NULL, ¬ify_callback); |
| dispatch_release(g); |
| } |
| |
| fprintf(stderr, "Done."); |
| } |
| |
| // CHECK: Hello world. |
| // CHECK: Done. |