author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 09:02:29 +0300 | |
changeset 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2009 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef RepatchBuffer_h |
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#define RepatchBuffer_h |
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#if ENABLE(ASSEMBLER) |
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#include <MacroAssembler.h> |
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#include <wtf/Noncopyable.h> |
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namespace JSC { |
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// RepatchBuffer: |
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// |
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// This class is used to modify code after code generation has been completed, |
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// and after the code has potentially already been executed. This mechanism is |
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// used to apply optimizations to the code. |
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// |
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class RepatchBuffer { |
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typedef MacroAssemblerCodePtr CodePtr; |
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public: |
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RepatchBuffer(CodeBlock* codeBlock) |
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{ |
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JITCode& code = codeBlock->getJITCode(); |
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m_start = code.start(); |
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m_size = code.size(); |
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ExecutableAllocator::makeWritable(m_start, m_size); |
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} |
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~RepatchBuffer() |
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{ |
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ExecutableAllocator::makeExecutable(m_start, m_size); |
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} |
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void relink(CodeLocationJump jump, CodeLocationLabel destination) |
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{ |
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MacroAssembler::repatchJump(jump, destination); |
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} |
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void relink(CodeLocationCall call, CodeLocationLabel destination) |
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{ |
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MacroAssembler::repatchCall(call, destination); |
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} |
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void relink(CodeLocationCall call, FunctionPtr destination) |
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{ |
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MacroAssembler::repatchCall(call, destination); |
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} |
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void relink(CodeLocationNearCall nearCall, CodePtr destination) |
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{ |
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MacroAssembler::repatchNearCall(nearCall, CodeLocationLabel(destination)); |
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} |
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void relink(CodeLocationNearCall nearCall, CodeLocationLabel destination) |
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{ |
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MacroAssembler::repatchNearCall(nearCall, destination); |
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} |
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void repatch(CodeLocationDataLabel32 dataLabel32, int32_t value) |
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{ |
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MacroAssembler::repatchInt32(dataLabel32, value); |
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} |
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void repatch(CodeLocationDataLabelPtr dataLabelPtr, void* value) |
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{ |
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MacroAssembler::repatchPointer(dataLabelPtr, value); |
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} |
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void repatchLoadPtrToLEA(CodeLocationInstruction instruction) |
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{ |
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MacroAssembler::repatchLoadPtrToLEA(instruction); |
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} |
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void relinkCallerToTrampoline(ReturnAddressPtr returnAddress, CodeLocationLabel label) |
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{ |
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relink(CodeLocationCall(CodePtr(returnAddress)), label); |
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} |
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void relinkCallerToTrampoline(ReturnAddressPtr returnAddress, CodePtr newCalleeFunction) |
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{ |
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relinkCallerToTrampoline(returnAddress, CodeLocationLabel(newCalleeFunction)); |
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} |
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void relinkCallerToFunction(ReturnAddressPtr returnAddress, FunctionPtr function) |
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{ |
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relink(CodeLocationCall(CodePtr(returnAddress)), function); |
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} |
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void relinkNearCallerToTrampoline(ReturnAddressPtr returnAddress, CodeLocationLabel label) |
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{ |
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relink(CodeLocationNearCall(CodePtr(returnAddress)), label); |
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} |
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void relinkNearCallerToTrampoline(ReturnAddressPtr returnAddress, CodePtr newCalleeFunction) |
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{ |
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relinkNearCallerToTrampoline(returnAddress, CodeLocationLabel(newCalleeFunction)); |
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} |
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private: |
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void* m_start; |
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size_t m_size; |
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}; |
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} // namespace JSC |
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#endif // ENABLE(ASSEMBLER) |
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#endif // RepatchBuffer_h |