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

/*
 * lock-nested.c -- Archer testcase
 */

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
//
// See tools/archer/LICENSE.txt for details.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//


// RUN: %libarcher-compile-and-run | FileCheck %s
// REQUIRES: tsan
#include <omp.h>
#include <stdio.h>

int main(int argc, char *argv[]) {
  int var = 0;

  omp_nest_lock_t lock;
  omp_init_nest_lock(&lock);

#pragma omp parallel num_threads(2) shared(var)
  {
    omp_set_nest_lock(&lock);
    omp_set_nest_lock(&lock);
    var++;
    omp_unset_nest_lock(&lock);
    omp_unset_nest_lock(&lock);
  }

  omp_destroy_nest_lock(&lock);

  fprintf(stderr, "DONE\n");
  int error = (var != 2);
  return error;
}

// CHECK-NOT: ThreadSanitizer: data race
// CHECK-NOT: ThreadSanitizer: reported
// CHECK: DONE