src/libcompiler_builtins/compiler-rt/test/tsan/Darwin/gcd-groups-stress.mm

   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 void notify_callback(void *context) {
   7   // Do nothing.
   8 }
   9
  10 int main() {
  11   NSLog(@"Hello world.");
  12
  13   dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
  14
  15   for (int i = 0; i < 300000; i++) {
  16     dispatch_group_t g = dispatch_group_create();
  17     dispatch_group_enter(g);
  18     dispatch_async(q, ^{
  19       dispatch_group_leave(g);
  20     });
  21     dispatch_group_notify(g, q, ^{
  22       // Do nothing.
  23     });
  24     dispatch_release(g);
  25   }
  26
  27   for (int i = 0; i < 300000; i++) {
  28     dispatch_group_t g = dispatch_group_create();
  29     dispatch_group_enter(g);
  30     dispatch_async(q, ^{
  31       dispatch_group_leave(g);
  32     });
  33     dispatch_group_notify_f(g, q, NULL, &notify_callback);
  34     dispatch_release(g);
  35   }
  36
  37   NSLog(@"Done.");
  38 }
  39
  40 // CHECK: Hello world.
  41 // CHECK: Done.
  42 // CHECK-NOT: WARNING: ThreadSanitizer
  43 // CHECK-NOT: CHECK failed