compiler-rt/test/tsan/libdispatch/groups-norace.c

   1 // RUN: %clang_tsan %s -o %t
   2 // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
   3
   4 #include "dispatch/dispatch.h"
   5
   6 #include <stdio.h>
   7
   8 long global;
   9
  10 int main() {
  11   fprintf(stderr, "Hello world.\n");
  12   dispatch_semaphore_t done = dispatch_semaphore_create(0);
  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_semaphore_signal(done);
  43   });
  44
  45   dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
  46   fprintf(stderr, "Done.\n");
  47 }
  48
  49 // CHECK: Hello world.
  50 // CHECK: Done.