Line data    Source code

       1             : // Copyright (c) 2009-2017 The Bitcoin Core developers
       2             : // Copyright (c) 2016-2020 The PIVX Core developers
       3             : // Distributed under the MIT software license, see the accompanying
       4             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       5             : 
       6             : #if defined(HAVE_CONFIG_H)
       7             : #include "config/pivx-config.h"
       8             : #endif
       9             : 
      10             : #include <cstddef>
      11             : 
      12             : extern "C" void* memcpy(void* a, const void* b, size_t c);
      13         380 : void* memcpy_int(void* a, const void* b, size_t c)
      14             : {
      15         380 :     return memcpy(a, b, c);
      16             : }
      17             : 
      18             : namespace
      19             : {
      20             : // trigger: Use the memcpy_int wrapper which calls our internal memcpy.
      21             : //   A direct call to memcpy may be optimized away by the compiler.
      22             : // test: Fill an array with a sequence of integers. memcpy to a new empty array.
      23             : //   Verify that the arrays are equal. Use an odd size to decrease the odds of
      24             : //   the call being optimized away.
      25             : template <unsigned int T>
      26         380 : bool sanity_test_memcpy()
      27             : {
      28             :     unsigned int memcpy_test[T];
      29         380 :     unsigned int memcpy_verify[T] = {};
      30      389880 :     for (unsigned int i = 0; i != T; ++i)
      31      389500 :         memcpy_test[i] = i;
      32             : 
      33         380 :     memcpy_int(memcpy_verify, memcpy_test, sizeof(memcpy_test));
      34             : 
      35      389880 :     for (unsigned int i = 0; i != T; ++i) {
      36      389500 :         if (memcpy_verify[i] != i)
      37             :             return false;
      38             :     }
      39             :     return true;
      40             : }
      41             : 
      42             : } // anon namespace
      43             : 
      44         380 : bool glibc_sanity_test()
      45             : {
      46         380 :     return sanity_test_memcpy<1025>();
      47             : }