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 global = 42; 15 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 16 global = 43; 17 18 dispatch_semaphore_signal(done); 19 }); 20 21 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER); 22 fprintf(stderr, "Done.\n"); 23 } 24 25 // CHECK: Hello world. 26 // CHECK: Done. 27