test/tsan/Darwin/gcd-groups-norace.mm

   1 // RUN: %clang_tsan %s -o %t -framework Foundation
   2 // RUN: %run %t 2>&1
   3
   4 #import <Foundation/Foundation.h>
   5
   6 #import "../test.h"
   7
   8 long global;
   9
  10 int main() {
  11   NSLog(@"Hello world.");
  12   NSLog(@"addr=%p\n", &global);
  13
  14   dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
  15   global = 42;
  16
  17   dispatch_group_t g = dispatch_group_create();
  18   dispatch_group_async(g, q, ^{
  19     global = 43;
  20   });
  21   dispatch_group_wait(g, DISPATCH_TIME_FOREVER);
  22
  23   global = 44;
  24
  25   dispatch_group_enter(g);
  26   dispatch_async(q, ^{
  27     global = 45;
  28     dispatch_group_leave(g);
  29   });
  30   dispatch_group_wait(g, DISPATCH_TIME_FOREVER);
  31
  32   global = 46;
  33
  34   dispatch_group_enter(g);
  35   dispatch_async(q, ^{
  36     global = 47;
  37     dispatch_group_leave(g);
  38   });
  39   dispatch_group_notify(g, q, ^{
  40     global = 48;
  41
  42     dispatch_sync(dispatch_get_main_queue(), ^{
  43       CFRunLoopStop(CFRunLoopGetCurrent());
  44     });
  45   });
  46
  47   CFRunLoopRun();
  48   NSLog(@"Done.");
  49 }
  50
  51 // CHECK: Hello world.
  52 // CHECK: Done.
  53 // CHECK-NOT: WARNING: ThreadSanitizer