compiler-rt/test/tsan/libdispatch/suspend.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 my_global = 0;
   9
  10 int main(int argc, const char *argv[]) {
  11   fprintf(stderr, "Hello world.\n");
  12
  13   dispatch_queue_t q1 = dispatch_queue_create("queue1", NULL);
  14   dispatch_queue_t q2 = dispatch_queue_create("queue2", NULL);
  15   dispatch_group_t g = dispatch_group_create();
  16
  17   dispatch_sync(q1, ^{
  18     dispatch_suspend(q1);
  19     dispatch_async(q2, ^{
  20       my_global++;
  21       dispatch_resume(q1);
  22     });
  23   });
  24
  25   dispatch_sync(q1, ^{
  26     my_global++;
  27   });
  28
  29   dispatch_sync(q1, ^{
  30     dispatch_suspend(q1);
  31     dispatch_group_enter(g);
  32     dispatch_async(q1,^{ my_global++; });
  33     dispatch_async(q1,^{ my_global++; });
  34     dispatch_async(q1,^{ my_global++; dispatch_group_leave(g); });
  35     my_global++;
  36     dispatch_resume(q1);
  37   });
  38
  39   dispatch_group_wait(g, DISPATCH_TIME_FOREVER);
  40
  41   fprintf(stderr, "Done.\n");
  42   return 0;
  43 }
  44
  45 // CHECK: Hello world.
  46 // CHECK: Done.