compiler-rt/test/asan/TestCases/strstr_strict.c

   1 // Test strict_string_checks option in strstr function
   2 // RUN: %clang_asan %s -o %t && %run %t 2>&1
   3
   4 // Newer versions of Android's strstr() uses memchr() internally, which actually
   5 // does trigger a heap-buffer-overflow (as it tries to find the
   6 // null-terminator). The same applies to FreeBSD.
   7 // UNSUPPORTED: android, target={{.*freebsd.*}}
   8 // RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
   9
  10 // RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
  11
  12 #include <assert.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15
  16 int main(int argc, char **argv) {
  17   size_t size = 100;
  18   char fill = 'o';
  19   char *s1 = (char*)malloc(size);
  20   char *s2 = (char*)malloc(size);
  21   memset(s1, fill, size);
  22   memset(s2, fill, size);
  23   s2[size - 1]='\0';
  24   char* r = strstr(s1, s2);
  25   // CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
  26   // CHECK: READ of size {{101|100}}
  27   assert(r == s1);
  28   free(s1);
  29   free(s2);
  30   return 0;
  31 }