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 

    34 namespace WTF {

    35 

    36 class RemoteMemoryReader {

    37     task_t m_task;

    38     memory_reader_t* m_reader;

    39 

    40 public:

    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         ASSERT(!err);

    51         if (err)

    52             output = 0;

    53         return output;

    54     }

    55 

    56     template <typename T>

    57     T* operator()(T* address, size_t size=sizeof(T)) const

    58     {

    59         return static_cast<T*>((*this)(reinterpret_cast<vm_address_t>(address), size));

    60     }

    61 };

    62 

    63 } // namespace WTF

    64 

    65 #endif // MallocZoneSupport_h