1 // RUN: %clang_tsan %s -o %t 2 // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer' 3 4 #include "dispatch/dispatch.h" 5 6 #include <stdio.h> 7 8 long global; 9 main()10int main() { 11 fprintf(stderr, "Hello world.\n"); 12 dispatch_semaphore_t done = dispatch_semaphore_create(0); 13 14 dispatch_queue_t q1 = dispatch_queue_create("my.queue1", DISPATCH_QUEUE_CONCURRENT); 15 dispatch_queue_t q2 = dispatch_queue_create("my.queue2", DISPATCH_QUEUE_SERIAL); 16 17 global = 42; 18 for (int i = 0; i < 10; i++) { 19 dispatch_async(q1, ^{ 20 for (int i = 0; i < 100; i++) { 21 dispatch_sync(q2, ^{ 22 global++; 23 }); 24 } 25 }); 26 } 27 28 dispatch_barrier_async(q1, ^{ 29 dispatch_semaphore_signal(done); 30 }); 31 32 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER); 33 fprintf(stderr, "Done.\n"); 34 } 35 36 // CHECK: Hello world. 37 // CHECK: Done. 38