1// Test strict_string_checks option in strcmp function
2// RUN: %clang_asan %s -o %t && %run %t 2>&1
3// RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
4// RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
5
6#include <assert.h>
7#include <stdlib.h>
8#include <string.h>
9
10int main(int argc, char **argv) {
11  size_t size = 100;
12  char fill = 'o';
13  char *s1 = (char*)malloc(size);
14  memset(s1, fill, size);
15  char *s2 = (char*)malloc(size);
16  memset(s2, fill, size);
17  s1[size - 1] = 'z';
18  s2[size - 1] = 'x';
19  int r = strcmp(s1, s2);
20  // CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
21  // CHECK: READ of size 101
22  assert(r == 1);
23  free(s1);
24  free(s2);
25  return 0;
26}
27