LCOV - code coverage report
Current view: top level - src/support/allocators - zeroafterfree.h (source / functions) Hit Total Coverage
Test: bitcoincash_test.info Lines: 5 5 100.0 %
Date: 2018-04-13 15:12:50 Functions: 0 0 -

          Line data    Source code
       1             : // Copyright (c) 2009-2010 Satoshi Nakamoto
       2             : // Copyright (c) 2009-2015 The Bitcoin 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             : #ifndef BITCOIN_SUPPORT_ALLOCATORS_ZEROAFTERFREE_H
       7             : #define BITCOIN_SUPPORT_ALLOCATORS_ZEROAFTERFREE_H
       8             : 
       9             : #include "support/cleanse.h"
      10             : 
      11             : #include <memory>
      12             : #include <vector>
      13             : 
      14             : template <typename T>
      15             : struct zero_after_free_allocator : public std::allocator<T> {
      16             :     // MSVC8 default copy constructor is broken
      17             :     typedef std::allocator<T> base;
      18             :     typedef typename base::size_type size_type;
      19             :     typedef typename base::difference_type difference_type;
      20             :     typedef typename base::pointer pointer;
      21             :     typedef typename base::const_pointer const_pointer;
      22             :     typedef typename base::reference reference;
      23             :     typedef typename base::const_reference const_reference;
      24             :     typedef typename base::value_type value_type;
      25      512726 :     zero_after_free_allocator() throw() {}
      26             :     zero_after_free_allocator(const zero_after_free_allocator &a) throw()
      27        2268 :         : base(a) {}
      28             :     template <typename U>
      29             :     zero_after_free_allocator(const zero_after_free_allocator<U> &a) throw()
      30             :         : base(a) {}
      31      515150 :     ~zero_after_free_allocator() throw() {}
      32             :     template <typename _Other> struct rebind {
      33             :         typedef zero_after_free_allocator<_Other> other;
      34             :     };
      35             : 
      36             :     void deallocate(T *p, std::size_t n) {
      37     1945868 :         if (p != nullptr) memory_cleanse(p, sizeof(T) * n);
      38     3891736 :         std::allocator<T>::deallocate(p, n);
      39             :     }
      40             : };
      41             : 
      42             : // Byte-vector that clears its contents before deletion.
      43             : typedef std::vector<char, zero_after_free_allocator<char>> CSerializeData;
      44             : 
      45             : #endif // BITCOIN_SUPPORT_ALLOCATORS_ZEROAFTERFREE_H

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