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/*
* Copyright (C) 2011-2023 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 "JSObject.h"
namespace JSC {
class JSGlobalProxy : public JSNonFinalObject {
public:
using Base = JSNonFinalObject;
static constexpr unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetOwnPropertyNames | OverridesPut | OverridesGetPrototype | OverridesIsExtensible | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero;
template<typename CellType, SubspaceAccess>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
static_assert(sizeof(CellType) == sizeof(JSGlobalProxy));
return &vm.jsGlobalProxySpace();
}
static JSGlobalProxy* create(VM& vm, Structure* structure)
{
JSGlobalProxy* proxy = new (NotNull, allocateCell<JSGlobalProxy>(vm)) JSGlobalProxy(vm, structure, nullptr);
proxy->finishCreation(vm);
return proxy;
}
static JSGlobalProxy* create(VM& vm, Structure* structure, JSGlobalObject* globalObject)
{
JSGlobalProxy* proxy = new (NotNull, allocateCell<JSGlobalProxy>(vm)) JSGlobalProxy(vm, structure, globalObject);
proxy->finishCreation(vm);
return proxy;
}
inline static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_EXPORT_INFO;
JSGlobalObject* target() const { return m_target.get(); }
static constexpr ptrdiff_t targetOffset() { return OBJECT_OFFSETOF(JSGlobalProxy, m_target); }
JS_EXPORT_PRIVATE void setTarget(VM&, JSGlobalObject*);
protected:
JSGlobalProxy(VM& vm, Structure* structure, JSGlobalObject* target)
: Base(vm, structure)
, m_target(target, WriteBarrierEarlyInit)
{
}
DECLARE_DEFAULT_FINISH_CREATION;
DECLARE_VISIT_CHILDREN_WITH_MODIFIER(JS_EXPORT_PRIVATE);
JS_EXPORT_PRIVATE static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);
JS_EXPORT_PRIVATE static bool getOwnPropertySlotByIndex(JSObject*, JSGlobalObject*, unsigned, PropertySlot&);
JS_EXPORT_PRIVATE static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);
JS_EXPORT_PRIVATE static bool putByIndex(JSCell*, JSGlobalObject*, unsigned, JSValue, bool shouldThrow);
JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName, DeletePropertySlot&);
JS_EXPORT_PRIVATE static bool deletePropertyByIndex(JSCell*, JSGlobalObject*, unsigned);
JS_EXPORT_PRIVATE static void getOwnPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, DontEnumPropertiesMode);
JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, JSGlobalObject*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
JS_EXPORT_PRIVATE static bool setPrototype(JSObject*, JSGlobalObject*, JSValue, bool shouldThrowIfCantSet);
JS_EXPORT_PRIVATE static JSValue getPrototype(JSObject*, JSGlobalObject*);
JS_EXPORT_PRIVATE static bool isExtensible(JSObject*, JSGlobalObject*);
JS_EXPORT_PRIVATE static bool preventExtensions(JSObject*, JSGlobalObject*);
private:
WriteBarrier<JSGlobalObject> m_target;
};
} // namespace JSC
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