1 /*
2  * task-dependency.c -- Archer testcase
3  */
4 
5 //===----------------------------------------------------------------------===//
6 //
7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
8 //
9 // See tools/archer/LICENSE.txt for details.
10 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
11 //
12 //===----------------------------------------------------------------------===//
13 
14 
15 // RUN: %libarcher-compile-and-run | FileCheck %s
16 // REQUIRES: tsan
17 #include <omp.h>
18 #include <stdio.h>
19 #include <unistd.h>
20 #include "ompt/ompt-signal.h"
21 
22 int main(int argc, char *argv[]) {
23   int var = 0, a = 0;
24 
25 #pragma omp parallel num_threads(2) shared(var, a)
26 #pragma omp master
27   {
28 #pragma omp task shared(var, a) depend(out : var)
29     {
30       var++;
31       OMPT_SIGNAL(a);
32     }
33 
34 #pragma omp task shared(var, a) depend(in : var)
35     { OMPT_WAIT(a, 2); }
36 
37 #pragma omp task shared(var, a) depend(in : var)
38     {
39       OMPT_SIGNAL(a);
40       var++;
41     }
42 
43     // Give other thread time to steal the task.
44     OMPT_WAIT(a, 1);
45   }
46 
47   fprintf(stderr, "DONE\n");
48   int error = (var != 2);
49   return error;
50 }
51 
52 // CHECK-NOT: ThreadSanitizer: data race
53 // CHECK-NOT: ThreadSanitizer: reported
54 // CHECK: DONE
55