openmp/tools/archer/tests/critical/lock.c

   1 /*
   2  * lock.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
  20 int main(int argc, char *argv[]) {
  21   int var = 0;
  22
  23   omp_lock_t lock;
  24   omp_init_lock(&lock);
  25
  26 #pragma omp parallel num_threads(2) shared(var)
  27   {
  28     omp_set_lock(&lock);
  29     var++;
  30     omp_unset_lock(&lock);
  31   }
  32
  33   omp_destroy_lock(&lock);
  34
  35   fprintf(stderr, "DONE\n");
  36   int error = (var != 2);
  37   return error;
  38 }
  39
  40 // CHECK-NOT: ThreadSanitizer: data race
  41 // CHECK-NOT: ThreadSanitizer: reported
  42 // CHECK: DONE