compiler-rt/test/asan/TestCases/small_memcpy_test.cpp

   1 // Test that small memcpy works correctly.
   2
   3 // RUN: %clangxx_asan %s -o %t
   4 // RUN: not %run %t 8 24 2>&1 | FileCheck %s --check-prefix=CHECK
   5 // RUN: not %run %t 16 32 2>&1 | FileCheck %s --check-prefix=CHECK
   6 // RUN: not %run %t 24 40 2>&1 | FileCheck %s --check-prefix=CHECK
   7 // RUN: not %run %t 32 48 2>&1 | FileCheck %s --check-prefix=CHECK
   8 // RUN: not %run %t 40 56 2>&1 | FileCheck %s --check-prefix=CHECK
   9 // RUN: not %run %t 48 64 2>&1 | FileCheck %s --check-prefix=CHECK
  10 // REQUIRES: shadow-scale-3
  11 #include <assert.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15
  16 #include <sanitizer/asan_interface.h>
  17
  18 int main(int argc, char **argv) {
  19   assert(argc == 3);
  20   size_t poison_from = atoi(argv[1]);
  21   size_t poison_to = atoi(argv[2]);
  22   assert(poison_from <= poison_to);
  23   char A1[64], A2[64];
  24   fprintf(stderr, "%zd %zd\n", poison_from, poison_to - poison_from);
  25   __asan_poison_memory_region(&A1[0] + poison_from, poison_to - poison_from);
  26   memcpy(A1, A2, sizeof(A1));
  27 // CHECK: AddressSanitizer: use-after-poison
  28   return 0;
  29 }