1 // RUN: %clang_tsan %s -o %t -framework Foundation 2 // RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s 3 4 #import <Foundation/Foundation.h> 5 6 #import "../test.h" 7 8 dispatch_semaphore_t sem; 9 10 long global; 11 long global2; 12 13 void callback(void *context) { 14 global2 = 48; 15 barrier_wait(&barrier); 16 17 dispatch_semaphore_signal(sem); 18 } 19 20 int main() { 21 fprintf(stderr, "Hello world.\n"); 22 barrier_init(&barrier, 2); 23 24 dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT); 25 dispatch_group_t g = dispatch_group_create(); 26 sem = dispatch_semaphore_create(0); 27 28 dispatch_group_enter(g); 29 dispatch_async(q, ^{ 30 global = 47; 31 dispatch_group_leave(g); 32 barrier_wait(&barrier); 33 }); 34 dispatch_group_notify(g, q, ^{ 35 global = 48; 36 barrier_wait(&barrier); 37 38 dispatch_semaphore_signal(sem); 39 }); 40 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); 41 42 dispatch_group_enter(g); 43 dispatch_async(q, ^{ 44 global2 = 47; 45 dispatch_group_leave(g); 46 barrier_wait(&barrier); 47 }); 48 dispatch_group_notify_f(g, q, NULL, &callback); 49 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); 50 51 fprintf(stderr, "Done.\n"); 52 } 53 54 // CHECK: Hello world. 55 // CHECK-NOT: WARNING: ThreadSanitizer 56 // CHECK: Done. 57
