author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 06 Jul 2010 15:10:48 +0300 | |
changeset 30 | 5dc02b23752f |
parent 0 | 1918ee327afb |
child 37 | 758a864f9613 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 1999-2000 Harri Porten (porten@kde.org) |
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* Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
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* Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca) |
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* Copyright (C) 2007 Maks Orlovich |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef Arguments_h |
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#define Arguments_h |
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#include "JSActivation.h" |
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#include "JSFunction.h" |
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#include "JSGlobalObject.h" |
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#include "Interpreter.h" |
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#include "ObjectConstructor.h" |
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#include "PrototypeFunction.h" |
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namespace JSC { |
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struct ArgumentsData : Noncopyable { |
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JSActivation* activation; |
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unsigned numParameters; |
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ptrdiff_t firstParameterIndex; |
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unsigned numArguments; |
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Register* registers; |
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OwnArrayPtr<Register> registerArray; |
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Register* extraArguments; |
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OwnArrayPtr<bool> deletedArguments; |
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Register extraArgumentsFixedBuffer[4]; |
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JSFunction* callee; |
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bool overrodeLength : 1; |
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bool overrodeCallee : 1; |
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}; |
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class Arguments : public JSObject { |
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public: |
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enum NoParametersType { NoParameters }; |
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Arguments(CallFrame*); |
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Arguments(CallFrame*, NoParametersType); |
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virtual ~Arguments(); |
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static const ClassInfo info; |
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virtual void markChildren(MarkStack&); |
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void fillArgList(ExecState*, MarkedArgumentBuffer&); |
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uint32_t numProvidedArguments(ExecState* exec) const |
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{ |
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if (UNLIKELY(d->overrodeLength)) |
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return get(exec, exec->propertyNames().length).toUInt32(exec); |
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return d->numArguments; |
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} |
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void copyToRegisters(ExecState* exec, Register* buffer, uint32_t maxSize); |
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void copyRegisters(); |
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bool isTornOff() const { return d->registerArray; } |
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void setActivation(JSActivation* activation) |
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{ |
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d->activation = activation; |
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d->registers = &activation->registerAt(0); |
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} |
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static PassRefPtr<Structure> createStructure(JSValue prototype) |
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{ |
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30
5dc02b23752f
Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); |
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} |
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protected: |
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static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags; |
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private: |
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void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc); |
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virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
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virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); |
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virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); |
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30
5dc02b23752f
Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties); |
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virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&); |
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virtual void put(ExecState*, unsigned propertyName, JSValue, PutPropertySlot&); |
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virtual bool deleteProperty(ExecState*, const Identifier& propertyName); |
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virtual bool deleteProperty(ExecState*, unsigned propertyName); |
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virtual const ClassInfo* classInfo() const { return &info; } |
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void init(CallFrame*); |
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OwnPtr<ArgumentsData> d; |
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}; |
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Arguments* asArguments(JSValue); |
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inline Arguments* asArguments(JSValue value) |
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{ |
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ASSERT(asObject(value)->inherits(&Arguments::info)); |
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return static_cast<Arguments*>(asObject(value)); |
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} |
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ALWAYS_INLINE void Arguments::getArgumentsData(CallFrame* callFrame, JSFunction*& function, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc) |
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{ |
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function = callFrame->callee(); |
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int numParameters = function->jsExecutable()->parameterCount(); |
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argc = callFrame->argumentCount(); |
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if (argc <= numParameters) |
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argv = callFrame->registers() - RegisterFile::CallFrameHeaderSize - numParameters; |
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else |
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argv = callFrame->registers() - RegisterFile::CallFrameHeaderSize - numParameters - argc; |
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argc -= 1; // - 1 to skip "this" |
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firstParameterIndex = -RegisterFile::CallFrameHeaderSize - numParameters; |
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} |
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inline Arguments::Arguments(CallFrame* callFrame) |
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: JSObject(callFrame->lexicalGlobalObject()->argumentsStructure()) |
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, d(new ArgumentsData) |
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{ |
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JSFunction* callee; |
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ptrdiff_t firstParameterIndex; |
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Register* argv; |
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int numArguments; |
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getArgumentsData(callFrame, callee, firstParameterIndex, argv, numArguments); |
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d->numParameters = callee->jsExecutable()->parameterCount(); |
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d->firstParameterIndex = firstParameterIndex; |
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d->numArguments = numArguments; |
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d->activation = 0; |
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d->registers = callFrame->registers(); |
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Register* extraArguments; |
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if (d->numArguments <= d->numParameters) |
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extraArguments = 0; |
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else { |
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unsigned numExtraArguments = d->numArguments - d->numParameters; |
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if (numExtraArguments > sizeof(d->extraArgumentsFixedBuffer) / sizeof(Register)) |
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extraArguments = new Register[numExtraArguments]; |
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else |
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extraArguments = d->extraArgumentsFixedBuffer; |
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for (unsigned i = 0; i < numExtraArguments; ++i) |
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extraArguments[i] = argv[d->numParameters + i]; |
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} |
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d->extraArguments = extraArguments; |
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d->callee = callee; |
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d->overrodeLength = false; |
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d->overrodeCallee = false; |
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} |
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inline Arguments::Arguments(CallFrame* callFrame, NoParametersType) |
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: JSObject(callFrame->lexicalGlobalObject()->argumentsStructure()) |
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, d(new ArgumentsData) |
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{ |
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ASSERT(!callFrame->callee()->jsExecutable()->parameterCount()); |
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unsigned numArguments = callFrame->argumentCount() - 1; |
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d->numParameters = 0; |
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d->numArguments = numArguments; |
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d->activation = 0; |
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Register* extraArguments; |
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if (numArguments > sizeof(d->extraArgumentsFixedBuffer) / sizeof(Register)) |
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extraArguments = new Register[numArguments]; |
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else |
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extraArguments = d->extraArgumentsFixedBuffer; |
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Register* argv = callFrame->registers() - RegisterFile::CallFrameHeaderSize - numArguments - 1; |
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for (unsigned i = 0; i < numArguments; ++i) |
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extraArguments[i] = argv[i]; |
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d->extraArguments = extraArguments; |
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d->callee = callFrame->callee(); |
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d->overrodeLength = false; |
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d->overrodeCallee = false; |
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} |
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inline void Arguments::copyRegisters() |
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{ |
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ASSERT(!isTornOff()); |
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if (!d->numParameters) |
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return; |
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int registerOffset = d->numParameters + RegisterFile::CallFrameHeaderSize; |
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size_t registerArraySize = d->numParameters; |
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Register* registerArray = new Register[registerArraySize]; |
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memcpy(registerArray, d->registers - registerOffset, registerArraySize * sizeof(Register)); |
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d->registerArray.set(registerArray); |
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d->registers = registerArray + registerOffset; |
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} |
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// This JSActivation function is defined here so it can get at Arguments::setRegisters. |
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inline void JSActivation::copyRegisters(Arguments* arguments) |
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{ |
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ASSERT(!d()->registerArray); |
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size_t numParametersMinusThis = d()->functionExecutable->generatedBytecode().m_numParameters - 1; |
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size_t numVars = d()->functionExecutable->generatedBytecode().m_numVars; |
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size_t numLocals = numVars + numParametersMinusThis; |
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if (!numLocals) |
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return; |
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int registerOffset = numParametersMinusThis + RegisterFile::CallFrameHeaderSize; |
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size_t registerArraySize = numLocals + RegisterFile::CallFrameHeaderSize; |
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Register* registerArray = copyRegisterArray(d()->registers - registerOffset, registerArraySize); |
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setRegisters(registerArray + registerOffset, registerArray); |
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if (arguments && !arguments->isTornOff()) |
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static_cast<Arguments*>(arguments)->setActivation(this); |
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} |
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ALWAYS_INLINE Arguments* Register::arguments() const |
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{ |
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if (jsValue() == JSValue()) |
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return 0; |
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return asArguments(jsValue()); |
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} |
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} // namespace JSC |
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#endif // Arguments_h |