src/compiler-rt/test/asan/TestCases/strcasestr-2.c

   1 // Test needle 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
  16 int main(int argc, char **argv) {
  17   char *r = 0;
  18   char s1[] = "ab";
  19   char s2[4] = "cba";
  20   __asan_poison_memory_region ((char *)&s2[2], 2);
  21   r = strcasestr(s1, s2);
  22   assert(r == 0);
  23   // CHECK:'s2' <== Memory access at offset {{[0-9]+}} partially overflows this variable
  24   return 0;
  25 }