compiler-rt/test/hwasan/TestCases/uaf_with_rb_distance.c

   1 // Checks how we print the developer note "hwasan_dev_note_heap_rb_distance".
   2 // RUN: %clang_hwasan %s -o %t
   3 // RUN: not %run %t 10 2>&1 | FileCheck %s --check-prefix=D10
   4 // RUN: not %run %t 42 2>&1 | FileCheck %s --check-prefix=D42
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <sanitizer/hwasan_interface.h>
   9
  10
  11 void *p[100];
  12
  13 int main(int argc, char **argv) {
  14   __hwasan_enable_allocator_tagging();
  15   int distance = argc >= 2 ? atoi(argv[1]) : 1;
  16   for (int i = 0; i < 100; i++)
  17     p[i] = malloc(i);
  18   for (int i = 0; i < 100; i++)
  19     free(p[i]);
  20
  21   *(int*)p[distance] = 0;
  22 }
  23
  24 // D10: hwasan_dev_note_heap_rb_distance: 90 1023
  25 // D42: hwasan_dev_note_heap_rb_distance: 58 1023