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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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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 "CagedBarrierPtr.h"
#include "JSObject.h"
namespace JSC {
// This is a mixin for the two kinds of Arguments-class objects that arise when you say
// "arguments" inside a function. This class doesn't show up in the JSCell inheritance hierarchy.
template<typename Type>
class GenericArgumentsImpl : public JSNonFinalObject {
public:
using Base = JSNonFinalObject;
static constexpr unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetOwnPropertyNames | OverridesPut | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero;
protected:
GenericArgumentsImpl(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
DECLARE_VISIT_CHILDREN;
static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);
static bool getOwnPropertySlotByIndex(JSObject*, JSGlobalObject*, unsigned propertyName, PropertySlot&);
static void getOwnPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, DontEnumPropertiesMode);
static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);
static bool putByIndex(JSCell*, JSGlobalObject*, unsigned propertyName, JSValue, bool shouldThrow);
static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName, DeletePropertySlot&);
static bool deletePropertyByIndex(JSCell*, JSGlobalObject*, unsigned propertyName);
static bool defineOwnProperty(JSObject*, JSGlobalObject*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
void initModifiedArgumentsDescriptor(JSGlobalObject*, unsigned length);
void initModifiedArgumentsDescriptorIfNecessary(JSGlobalObject*, unsigned length);
void setModifiedArgumentDescriptor(JSGlobalObject*, unsigned index, unsigned length);
bool isModifiedArgumentDescriptor(unsigned index, unsigned length);
void copyToArguments(JSGlobalObject*, JSValue* firstElementDest, unsigned offset, unsigned length);
using ModifiedArgumentsPtr = CagedBarrierPtr<Gigacage::Primitive, bool>;
ModifiedArgumentsPtr m_modifiedArgumentsDescriptor;
};
} // namespace JSC
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