1/*
2 * Copyright (C) 2007 Apple Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef MallocZoneSupport_h
30#define MallocZoneSupport_h
31
32#include <malloc/malloc.h>
33
34namespace WTF {
35
36class RemoteMemoryReader {
37    task_t m_task;
38    memory_reader_t* m_reader;
39
40public:
41    RemoteMemoryReader(task_t task, memory_reader_t* reader)
42        : m_task(task)
43        , m_reader(reader)
44    { }
45
46    void* operator()(vm_address_t address, size_t size) const
47    {
48        void* output;
49        kern_return_t err = (*m_reader)(m_task, address, size, static_cast<void**>(&output));
50        if (err)
51            output = 0;
52        return output;
53    }
54
55    template <typename T>
56    T* operator()(T* address, size_t size=sizeof(T)) const
57    {
58        return static_cast<T*>((*this)(reinterpret_cast<vm_address_t>(address), size));
59    }
60
61    template <typename T>
62    T* nextEntryInHardenedLinkedList(T** address, uintptr_t entropy) const;
63};
64
65} // namespace WTF
66
67#endif // MallocZoneSupport_h
68