compiler-rt/test/hwasan/TestCases/malloc_fill.cpp

   1 // Check that we fill malloc-ed memory correctly.
   2 // RUN: %clangxx_hwasan %s -o %t
   3 // RUN: %run %t | FileCheck %s --check-prefix=CHECK-0
   4 // RUN: %env_hwasan_opts=max_malloc_fill_size=20 %run %t | FileCheck %s --check-prefix=CHECK-20-be
   5 // RUN: %env_hwasan_opts=max_malloc_fill_size=0:malloc_fill_byte=8 %run %t | FileCheck %s --check-prefix=CHECK-0
   6 // RUN: %env_hwasan_opts=max_malloc_fill_size=10:malloc_fill_byte=8 %run %t | FileCheck %s --check-prefix=CHECK-10-8
   7 // RUN: %env_hwasan_opts=max_malloc_fill_size=20:malloc_fill_byte=171 %run %t | FileCheck %s --check-prefix=CHECK-20-ab
   8
   9 #include <stdio.h>
  10
  11 int main(int argc, char **argv) {
  12   // With asan allocator this makes sure we get memory from mmap.
  13   static const int kSize = 1 << 25;
  14   unsigned char *x = new unsigned char[kSize];
  15   printf("-");
  16   for (int i = 0; i <= 32; i++) {
  17     printf("%02x", x[i]);
  18   }
  19   printf("-\n");
  20   delete [] x;
  21 }
  22
  23 // CHECK-0: -000000000000000000000000000000000000000000000000000000000000000000-
  24 // CHECK-20-be: -bebebebebebebebebebebebebebebebebebebebe00000000000000000000000000-
  25 // CHECK-10-8: -080808080808080808080000000000000000000000000000000000000000000000-
  26 // CHECK-20-ab: -abababababababababababababababababababab00000000000000000000000000-