src/compiler-rt/test/tsan/Darwin/gcd-sync-norace.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 long global;
   7
   8 static const long nIter = 1000;
   9
  10 int main() {
  11   NSLog(@"Hello world.");
  12
  13   global = 42;
  14   for (int i = 0; i < nIter; i++) {
  15     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
  16       dispatch_sync(dispatch_get_main_queue(), ^{
  17         global = i;
  18
  19         if (i == nIter - 1) {
  20           CFRunLoopStop(CFRunLoopGetCurrent());
  21         }
  22       });
  23     });
  24   }
  25
  26   CFRunLoopRun();
  27   NSLog(@"Done.");
  28 }
  29
  30 // CHECK: Hello world.
  31 // CHECK: Done.
  32 // CHECK-NOT: WARNING: ThreadSanitizer