1// RUN: %clangxx_asan -O0 %s -pthread -o %t && %run %t
2// RUN: %clangxx_asan -O2 %s -pthread -o %t && %run %t
3// REQUIRES: stable-runtime
4
5#include <assert.h>
6#include <pthread.h>
7#include <sanitizer/allocator_interface.h>
8#include <stdio.h>
9#include <stdlib.h>
10
11const size_t kLargeAlloc = 1UL << 20;
12
13void* allocate(void *arg) {
14  volatile void *ptr = malloc(kLargeAlloc);
15  free((void*)ptr);
16  return 0;
17}
18
19void* check_stats(void *arg) {
20  assert(__sanitizer_get_current_allocated_bytes() > 0);
21  return 0;
22}
23
24int main() {
25  size_t used_mem = __sanitizer_get_current_allocated_bytes();
26  printf("Before: %zu\n", used_mem);
27  const int kNumIterations = 1000;
28  for (int iter = 0; iter < kNumIterations; iter++) {
29    pthread_t thr[4];
30    for (int j = 0; j < 4; j++) {
31      assert(0 ==
32             pthread_create(&thr[j], 0, (j < 2) ? allocate : check_stats, 0));
33    }
34    for (int j = 0; j < 4; j++)
35      assert(0 == pthread_join(thr[j], 0));
36    used_mem = __sanitizer_get_current_allocated_bytes();
37    if (used_mem > kLargeAlloc) {
38      printf("After iteration %d: %zu\n", iter, used_mem);
39      return 1;
40    }
41  }
42  printf("Success after %d iterations\n", kNumIterations);
43  return 0;
44}
45