1// Test string s1 overflow in strspn 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_strspn asan option
5// RUN: %env_asan_opts=intercept_strspn=false %run %t 2>&1
6
7#include <assert.h>
8#include <string.h>
9#include <sanitizer/asan_interface.h>
10
11int main(int argc, char **argv) {
12 size_t r;
13 char s2[] = "ab";
14 char s1[4] = "acb";
15 __asan_poison_memory_region (addr: (char *)&s1[2], size: 2);
16 r = strspn(s: s1, accept: s2);
17 // CHECK:'s1'{{.*}} <== Memory access at offset {{[0-9]+}} partially overflows this variable
18 assert(r == 1);
19 return 0;
20}
21

source code of compiler-rt/test/asan/TestCases/strspn-1.c