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 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* nextEntryInLinkedList(T** address) const 63 { 64 T** output = (*this)(address); 65 if (!output) 66 return 0; 67 return *output; 68 } 69 }; 70 71 } // namespace WTF 72 73 #endif // MallocZoneSupport_h 74
