1// Check that free hook doesn't conflict with Realloc.
2// RUN: %clangxx_asan -O2 %s -o %t
3// RUN: %run %t 2>&1 | FileCheck %s
4
5#include <stdlib.h>
6#include <unistd.h>
7#include <sanitizer/allocator_interface.h>
8
9static void *glob_ptr;
10
11extern "C" {
12void __sanitizer_free_hook(const volatile void *ptr) {
13  if (ptr == glob_ptr) {
14    *(int*)ptr = 0;
15    write(1, "FreeHook\n", sizeof("FreeHook\n"));
16  }
17}
18}
19
20int main() {
21  int *x = (int*)malloc(100);
22  x[0] = 42;
23  glob_ptr = x;
24  int *y = (int*)realloc(x, 200);
25  // Verify that free hook was called and didn't spoil the memory.
26  if (y[0] != 42) {
27    _exit(1);
28  }
29  write(1, "Passed\n", sizeof("Passed\n"));
30  free(y);
31  // CHECK: FreeHook
32  // CHECK: Passed
33  return 0;
34}
35