openmp/tools/archer/tests/races/task-two.c

   1 /*
   2  * task-two.c -- Archer testcase
   3  */
   4 //===----------------------------------------------------------------------===//
   5 //
   6 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   7 //
   8 // See tools/archer/LICENSE.txt for details.
   9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 // RUN: %libarcher-compile-and-run-race | FileCheck %s
  14 // RUN: %libarcher-compile-and-run-race-noserial | FileCheck %s
  15 // REQUIRES: tsan
  16 #include <omp.h>
  17 #include <stdio.h>
  18 #include <unistd.h>
  19
  20 #define NUM_THREADS 8
  21
  22 int main(int argc, char *argv[]) {
  23   int var = 0;
  24   int i;
  25
  26 #pragma omp parallel for num_threads(NUM_THREADS) shared(var)                  \
  27     schedule(static, 1)
  28   for (i = 0; i < NUM_THREADS; i++) {
  29 #pragma omp task shared(var) if (0) // the task is inlined an executed locally
  30     { var++; }
  31   }
  32
  33   int error = (var != 2);
  34   fprintf(stderr, "DONE\n");
  35   return error;
  36 }
  37
  38 // CHECK: WARNING: ThreadSanitizer: data race
  39 // CHECK-NEXT:   {{(Write|Read)}} of size 4
  40 // CHECK-NEXT: #0 {{.*}}task-two.c:30
  41 // CHECK:   Previous write of size 4
  42 // CHECK-NEXT: #0 {{.*}}task-two.c:30
  43 // CHECK: DONE
  44 // CHECK: ThreadSanitizer: reported {{[0-9]+}} warnings