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/*
* Copyright (C) 2015-2021 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 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.
*/
#pragma once
#include "JSLexicalEnvironment.h"
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
class AbstractModuleRecord;
class Register;
class JSModuleEnvironment final : public JSLexicalEnvironment {
friend class JIT;
friend class LLIntOffsetsExtractor;
public:
using Base = JSLexicalEnvironment;
static constexpr unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetOwnSpecialPropertyNames | OverridesPut;
static JSModuleEnvironment* create(VM& vm, JSGlobalObject* globalObject, JSScope* currentScope, SymbolTable* symbolTable, JSValue initialValue, AbstractModuleRecord* moduleRecord)
{
Structure* structure = globalObject->moduleEnvironmentStructure();
return create(vm, structure, currentScope, symbolTable, initialValue, moduleRecord);
}
DECLARE_INFO;
inline static Structure* createStructure(VM&, JSGlobalObject*);
static size_t offsetOfModuleRecord(SymbolTable* symbolTable)
{
size_t offset = Base::allocationSize(symbolTable);
ASSERT(WTF::roundUpToMultipleOf<sizeof(WriteBarrier<AbstractModuleRecord>)>(offset) == offset);
return offset;
}
static size_t allocationSize(SymbolTable* symbolTable)
{
return offsetOfModuleRecord(symbolTable) + sizeof(WriteBarrier<AbstractModuleRecord>);
}
AbstractModuleRecord* moduleRecord()
{
return moduleRecordSlot().get();
}
static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);
static void getOwnSpecialPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, DontEnumPropertiesMode);
static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);
static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName, DeletePropertySlot&);
private:
JSModuleEnvironment(VM&, Structure*, JSScope*, SymbolTable*, JSValue initialValue, AbstractModuleRecord*);
static JSModuleEnvironment* create(VM&, Structure*, JSScope*, SymbolTable*, JSValue initialValue, AbstractModuleRecord*);
DECLARE_DEFAULT_FINISH_CREATION;
WriteBarrierBase<AbstractModuleRecord>& moduleRecordSlot()
{
return *std::bit_cast<WriteBarrierBase<AbstractModuleRecord>*>(std::bit_cast<char*>(this) + offsetOfModuleRecord(symbolTable()));
}
DECLARE_VISIT_CHILDREN;
};
inline JSModuleEnvironment::JSModuleEnvironment(VM& vm, Structure* structure, JSScope* currentScope, SymbolTable* symbolTable, JSValue initialValue, AbstractModuleRecord* moduleRecord)
: Base(vm, structure, currentScope, symbolTable, initialValue)
{
this->moduleRecordSlot().setWithoutWriteBarrier(moduleRecord);
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
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