| // RUN: %clang_tsan %s -o %t |
| // RUN: %run %t 2>&1 | FileCheck %s |
| |
| #include "dispatch/dispatch.h" |
| |
| #include <stdio.h> |
| |
| long global; |
| |
| static const long nIter = 1000; |
| |
| int main() { |
| fprintf(stderr, "Hello world.\n"); |
| dispatch_semaphore_t done = dispatch_semaphore_create(0); |
| |
| dispatch_queue_t serial_q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL); |
| |
| global = 42; |
| for (int i = 0; i < nIter; i++) { |
| dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ |
| dispatch_sync(serial_q, ^{ |
| global = i; |
| |
| if (i == nIter - 1) { |
| dispatch_semaphore_signal(done); |
| } |
| }); |
| }); |
| } |
| |
| dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER); |
| fprintf(stderr, "Done.\n"); |
| } |
| |
| // CHECK: Hello world. |
| // CHECK: Done. |
| // CHECK-NOT: WARNING: ThreadSanitizer |