compiler-rt/test/hwasan/TestCases/Linux/reuse-threads.cpp

   1 // Test that Thread objects are reused.
   2 // RUN: %clangxx_hwasan -mllvm -hwasan-globals=0 -mllvm -hwasan-instrument-stack=0 %s -o %t && %env_hwasan_opts=verbose_threads=1 %run %t 2>&1 | FileCheck %s
   3
   4 #include <assert.h>
   5 #include <fcntl.h>
   6 #include <pthread.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10
  11 #include <sanitizer/hwasan_interface.h>
  12
  13 pthread_barrier_t bar;
  14
  15 void *threadfn(void *) {
  16   pthread_barrier_wait(&bar);
  17   return nullptr;
  18 }
  19
  20 void start_stop_threads() {
  21   constexpr int N = 2;
  22   pthread_t threads[N];
  23
  24   pthread_barrier_init(&bar, nullptr, N + 1);
  25   for (auto &t : threads)
  26     pthread_create(&t, nullptr, threadfn, nullptr);
  27
  28   pthread_barrier_wait(&bar);
  29
  30   for (auto &t : threads)
  31     pthread_join(t, nullptr);
  32   pthread_barrier_destroy(&bar);
  33 }
  34
  35 int main() {
  36   // Cut off initial threads.
  37   // CHECK: === test start ===
  38   fprintf(stderr, "=== test start ===\n");
  39
  40   // CHECK: Creating  : T{{[0-9]+}} [[A:0x[0-9a-f]+]] stack:
  41   // CHECK: Creating  : T{{[0-9]+}} [[B:0x[0-9a-f]+]] stack:
  42   start_stop_threads();
  43
  44   // CHECK-DAG: Creating  : T{{[0-9]+}} [[A]] stack:
  45   // CHECK-DAG: Creating  : T{{[0-9]+}} [[B]] stack:
  46   start_stop_threads();
  47
  48   // CHECK-DAG: Creating  : T{{[0-9]+}} [[A]] stack:
  49   // CHECK-DAG: Creating  : T{{[0-9]+}} [[B]] stack:
  50   start_stop_threads();
  51
  52   return 0;
  53 }