1// Test haystack overflow in strcasestr function
2// RUN: %clang_asan %s -o %t && %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
3
4// Test intercept_strstr asan option
5// Disable other interceptors because strlen may be called inside strcasestr
6// RUN: %env_asan_opts=intercept_strstr=false:replace_str=false %run %t 2>&1
7
8// There's no interceptor for strcasestr on Windows
9// XFAIL: win32
10
11#define _GNU_SOURCE
12#include <assert.h>
13#include <string.h>
14#include <sanitizer/asan_interface.h>
15
16int main(int argc, char **argv) {
17  char *r = 0;
18  char s2[] = "c";
19  char s1[4] = "abC";
20  __asan_poison_memory_region ((char *)&s1[2], 2);
21  r = strcasestr(s1, s2);
22  // CHECK:'s1' <== Memory access at offset {{[0-9]+}} partially overflows this variable
23  assert(r == s1 + 2);
24  return 0;
25}
26