+++ /dev/null
-/*
- * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef JSVariableObject_h
-#define JSVariableObject_h
-
-#include "JSObject.h"
-#include "Register.h"
-#include "SymbolTable.h"
-#include "UnusedParam.h"
-#include <wtf/OwnArrayPtr.h>
-#include <wtf/UnusedParam.h>
-
-namespace JSC {
-
- class Register;
-
- class JSVariableObject : public JSNonFinalObject {
- friend class JIT;
-
- public:
- SymbolTable& symbolTable() const { return *m_symbolTable; }
-
- virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes) = 0;
-
- virtual bool deleteProperty(ExecState*, const Identifier&);
- virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
-
- virtual bool isVariableObject() const;
- virtual bool isDynamicScope(bool& requiresDynamicChecks) const = 0;
-
- WriteBarrier<Unknown>& registerAt(int index) const { return m_registers[index]; }
-
- WriteBarrier<Unknown>* const * addressOfRegisters() const { return &m_registers; }
-
- static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
- {
- return Structure::create(globalData, prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
- }
-
- protected:
- static const unsigned StructureFlags = OverridesGetPropertyNames | JSObject::StructureFlags;
-
- JSVariableObject(JSGlobalData& globalData, Structure* structure, SymbolTable* symbolTable, Register* registers)
- : JSNonFinalObject(globalData, structure)
- , m_symbolTable(symbolTable)
- , m_registers(reinterpret_cast<WriteBarrier<Unknown>*>(registers))
- {
- ASSERT(m_symbolTable);
- COMPILE_ASSERT(sizeof(WriteBarrier<Unknown>) == sizeof(Register), Register_should_be_same_size_as_WriteBarrier);
- }
-
- PassOwnArrayPtr<WriteBarrier<Unknown> > copyRegisterArray(JSGlobalData&, WriteBarrier<Unknown>* src, size_t count, size_t callframeStarts);
- void setRegisters(WriteBarrier<Unknown>* registers, PassOwnArrayPtr<WriteBarrier<Unknown> > registerArray);
-
- bool symbolTableGet(const Identifier&, PropertySlot&);
- bool symbolTableGet(const Identifier&, PropertyDescriptor&);
- bool symbolTableGet(const Identifier&, PropertySlot&, bool& slotIsWriteable);
- bool symbolTablePut(JSGlobalData&, const Identifier&, JSValue);
- bool symbolTablePutWithAttributes(JSGlobalData&, const Identifier&, JSValue, unsigned attributes);
-
- SymbolTable* m_symbolTable; // Maps name -> offset from "r" in register file.
- WriteBarrier<Unknown>* m_registers; // "r" in the register file.
- OwnArrayPtr<WriteBarrier<Unknown> > m_registerArray; // Independent copy of registers, used when a variable object copies its registers out of the register file.
- };
-
- inline bool JSVariableObject::symbolTableGet(const Identifier& propertyName, PropertySlot& slot)
- {
- SymbolTableEntry entry = symbolTable().inlineGet(propertyName.impl());
- if (!entry.isNull()) {
- slot.setValue(registerAt(entry.getIndex()).get());
- return true;
- }
- return false;
- }
-
- inline bool JSVariableObject::symbolTableGet(const Identifier& propertyName, PropertySlot& slot, bool& slotIsWriteable)
- {
- SymbolTableEntry entry = symbolTable().inlineGet(propertyName.impl());
- if (!entry.isNull()) {
- slot.setValue(registerAt(entry.getIndex()).get());
- slotIsWriteable = !entry.isReadOnly();
- return true;
- }
- return false;
- }
-
- inline bool JSVariableObject::symbolTablePut(JSGlobalData& globalData, const Identifier& propertyName, JSValue value)
- {
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- SymbolTableEntry entry = symbolTable().inlineGet(propertyName.impl());
- if (entry.isNull())
- return false;
- if (entry.isReadOnly())
- return true;
- registerAt(entry.getIndex()).set(globalData, this, value);
- return true;
- }
-
- inline bool JSVariableObject::symbolTablePutWithAttributes(JSGlobalData& globalData, const Identifier& propertyName, JSValue value, unsigned attributes)
- {
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- SymbolTable::iterator iter = symbolTable().find(propertyName.impl());
- if (iter == symbolTable().end())
- return false;
- SymbolTableEntry& entry = iter->second;
- ASSERT(!entry.isNull());
- entry.setAttributes(attributes);
- registerAt(entry.getIndex()).set(globalData, this, value);
- return true;
- }
-
- inline PassOwnArrayPtr<WriteBarrier<Unknown> > JSVariableObject::copyRegisterArray(JSGlobalData& globalData, WriteBarrier<Unknown>* src, size_t count, size_t callframeStarts)
- {
- OwnArrayPtr<WriteBarrier<Unknown> > registerArray = adoptArrayPtr(new WriteBarrier<Unknown>[count]);
- for (size_t i = 0; i < callframeStarts; i++)
- registerArray[i].set(globalData, this, src[i].get());
- for (size_t i = callframeStarts + RegisterFile::CallFrameHeaderSize; i < count; i++)
- registerArray[i].set(globalData, this, src[i].get());
-
- return registerArray.release();
- }
-
- inline void JSVariableObject::setRegisters(WriteBarrier<Unknown>* registers, PassOwnArrayPtr<WriteBarrier<Unknown> > registerArray)
- {
- ASSERT(registerArray != m_registerArray);
- m_registerArray = registerArray;
- m_registers = registers;
- }
-
-} // namespace JSC
-
-#endif // JSVariableObject_h
projects / apple / javascriptcore.git / blobdiff