src/libcompiler_builtins/compiler-rt/test/tsan/Darwin/workerthreads.mm

   1 // RUN: %clang_tsan %s -o %t -framework Foundation
   2 // RUN: %deflake %run %t 2>&1 | FileCheck %s
   3
   4 #import <Foundation/Foundation.h>
   5
   6 #import "../test.h"
   7
   8 long global;
   9
  10 int main() {
  11   fprintf(stderr, "Hello world.\n");
  12   print_address("addr=", 1, &global);
  13   barrier_init(&barrier, 2);
  14
  15   global = 42;
  16   dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
  17     global = 43;
  18     barrier_wait(&barrier);
  19   });
  20
  21   dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
  22     barrier_wait(&barrier);
  23     global = 44;
  24
  25     dispatch_sync(dispatch_get_main_queue(), ^{
  26       CFRunLoopStop(CFRunLoopGetCurrent());
  27     });
  28   });
  29
  30   CFRunLoopRun();
  31   fprintf(stderr, "Done.\n");
  32 }
  33
  34 // CHECK: Hello world.
  35 // CHECK: WARNING: ThreadSanitizer: data race
  36 // CHECK: Write of size 8
  37 // CHECK: Previous write of size 8
  38 // CHECK: Location is global
  39 // CHECK: Thread {{.*}} is a GCD worker thread
  40 // CHECK-NOT: failed to restore the stack
  41 // CHECK: Thread {{.*}} is a GCD worker thread
  42 // CHECK-NOT: failed to restore the stack
  43 // CHECK: Done.