compiler-rt/test/asan/TestCases/strstr-2.c

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