src/compiler-rt/test/asan/TestCases/strcspn_strict.c

   1 // Test strict_string_checks option in strcspn function
   2 // RUN: %clang_asan %s -o %t && %run %t 2>&1
   3 // RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
   4 // RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s
   5
   6 #include <assert.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 int main(int argc, char **argv) {
  11   size_t size = 100;
  12   char fill = 'o';
  13   char *s1 = (char*)malloc(size);
  14   char *s2 = (char*)malloc(size);
  15   memset(s1, fill, size);
  16   s1[0] = 'z';
  17   memset(s2, fill, size);
  18   s2[size-1] = '\0';
  19   size_t r = strcspn(s1, s2);
  20   // CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
  21   // CHECK: READ of size 101
  22   assert(r == 1);
  23   free(s1);
  24   free(s2);
  25   return 0;
  26 }