compiler-rt/test/asan/TestCases/strcasestr-1.c

   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: target={{.*windows-(msvc.*|gnu)}}
  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 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 }