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/*
* Copyright (C) 2006-2022 Apple Inc. All rights reserved.
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
*
* 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.
*/
#ifndef JSCallbackObject_h
#define JSCallbackObject_h
#if JSC_OBJC_API_ENABLED || defined(JSC_GLIB_API_ENABLED)
#include "JSAPIWrapperObject.h"
#endif
#if defined(JSC_GLIB_API_ENABLED)
#include "JSAPIWrapperGlobalObject.h"
#endif
#include "JSBase.h"
#include "JSGlobalObject.h"
#include "JSObject.h"
#include "JSObjectRef.h"
#include "JSValueRef.h"
#include <wtf/Platform.h>
namespace JSC {
struct JSCallbackObjectData {
WTF_DEPRECATED_MAKE_FAST_ALLOCATED(JSCallbackObjectData);
public:
JSCallbackObjectData(void* privateData, JSClassRef jsClass)
: privateData(privateData)
, jsClass(jsClass)
{
JSClassRetain(jsClass);
}
~JSCallbackObjectData()
{
JSClassRelease(jsClass);
}
JSValue getPrivateProperty(const Identifier& propertyName) const
{
if (!m_privateProperties)
return JSValue();
return m_privateProperties->getPrivateProperty(propertyName);
}
void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value)
{
if (!m_privateProperties)
m_privateProperties = makeUnique<JSPrivatePropertyMap>();
m_privateProperties->setPrivateProperty(vm, owner, propertyName, value);
}
void deletePrivateProperty(const Identifier& propertyName)
{
if (!m_privateProperties)
return;
m_privateProperties->deletePrivateProperty(propertyName);
}
DECLARE_VISIT_CHILDREN;
template<typename Visitor>
void visitChildren(Visitor& visitor)
{
JSPrivatePropertyMap* properties = m_privateProperties.get();
if (!properties)
return;
properties->visitChildren(visitor);
}
void* privateData;
JSClassRef jsClass;
struct JSPrivatePropertyMap {
WTF_DEPRECATED_MAKE_FAST_ALLOCATED(JSPrivatePropertyMap);
public:
JSValue getPrivateProperty(const Identifier& propertyName) const
{
PrivatePropertyMap::const_iterator location = m_propertyMap.find(propertyName.impl());
if (location == m_propertyMap.end())
return JSValue();
return location->value.get();
}
void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value)
{
Locker locker { m_lock };
WriteBarrier<Unknown> empty;
m_propertyMap.add(propertyName.impl(), empty).iterator->value.set(vm, owner, value);
}
void deletePrivateProperty(const Identifier& propertyName)
{
Locker locker { m_lock };
m_propertyMap.remove(propertyName.impl());
}
template<typename Visitor>
void visitChildren(Visitor& visitor)
{
Locker locker { m_lock };
for (auto& pair : m_propertyMap) {
if (pair.value)
visitor.append(pair.value);
}
}
private:
typedef UncheckedKeyHashMap<RefPtr<UniquedStringImpl>, WriteBarrier<Unknown>, IdentifierRepHash> PrivatePropertyMap;
PrivatePropertyMap m_propertyMap;
Lock m_lock;
};
std::unique_ptr<JSPrivatePropertyMap> m_privateProperties;
};
template <class Parent>
class JSCallbackObject final : public Parent {
public:
using Base = Parent;
static constexpr unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetOwnSpecialPropertyNames | OverridesGetCallData | OverridesPut | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | ImplementsHasInstance | ProhibitsPropertyCaching | GetOwnPropertySlotMayBeWrongAboutDontEnum;
static_assert(!(StructureFlags & ImplementsDefaultHasInstance), "using customHasInstance");
~JSCallbackObject();
static JSCallbackObject* create(JSGlobalObject* globalObject, Structure* structure, JSClassRef classRef, void* data)
{
VM& vm = getVM(globalObject);
ASSERT_UNUSED(globalObject, !structure->realm() || structure->realm() == globalObject);
JSCallbackObject* callbackObject = new (NotNull, allocateCell<JSCallbackObject>(vm)) JSCallbackObject(globalObject, structure, classRef, data);
callbackObject->finishCreation(globalObject);
return callbackObject;
}
static JSCallbackObject<Parent>* create(VM&, JSClassRef, Structure*);
static const DestructionMode needsDestruction;
static void destroy(JSCell* cell)
{
static_cast<JSCallbackObject*>(cell)->JSCallbackObject::~JSCallbackObject();
}
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return subspaceForImpl(vm, mode);
}
void setPrivate(void* data);
void* getPrivate();
DECLARE_INFO;
JSClassRef classRef() const { return m_callbackObjectData->jsClass; }
bool inherits(JSClassRef) const;
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
JSValue getPrivateProperty(const Identifier& propertyName) const
{
return m_callbackObjectData->getPrivateProperty(propertyName);
}
void setPrivateProperty(VM& vm, const Identifier& propertyName, JSValue value)
{
m_callbackObjectData->setPrivateProperty(vm, this, propertyName, value);
}
void deletePrivateProperty(const Identifier& propertyName)
{
m_callbackObjectData->deletePrivateProperty(propertyName);
}
using Parent::methodTable;
static EncodedJSValue callImpl(JSGlobalObject*, CallFrame*);
static EncodedJSValue constructImpl(JSGlobalObject*, CallFrame*);
static EncodedJSValue staticFunctionGetterImpl(JSGlobalObject*, EncodedJSValue, PropertyName);
static EncodedJSValue callbackGetterImpl(JSGlobalObject*, EncodedJSValue, PropertyName);
DECLARE_VISIT_CHILDREN;
private:
JSCallbackObject(JSGlobalObject*, Structure*, JSClassRef, void* data);
JSCallbackObject(VM&, JSClassRef, Structure*);
void finishCreation(JSGlobalObject*);
void finishCreation(VM&);
static GCClient::IsoSubspace* subspaceForImpl(VM&, SubspaceAccess);
static EncodedJSValue JSC_HOST_CALL_ATTRIBUTES customToPrimitive(JSGlobalObject*, CallFrame*);
static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);
static bool getOwnPropertySlotByIndex(JSObject*, JSGlobalObject*, unsigned propertyName, PropertySlot&);
static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);
static bool putByIndex(JSCell*, JSGlobalObject*, unsigned, JSValue, bool shouldThrow);
static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName, DeletePropertySlot&);
static bool deletePropertyByIndex(JSCell*, JSGlobalObject*, unsigned);
static bool customHasInstance(JSObject*, JSGlobalObject*, JSValue);
static void getOwnSpecialPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArrayBuilder&, DontEnumPropertiesMode);
static CallData getConstructData(JSCell*);
static CallData getCallData(JSCell*);
void init(JSGlobalObject*);
static JSCallbackObject* asCallbackObject(JSValue);
static JSCallbackObject* asCallbackObject(EncodedJSValue);
using RawNativeFunction = EncodedJSValue(JSC_HOST_CALL_ATTRIBUTES*)(JSGlobalObject*, CallFrame*);
static RawNativeFunction getCallFunction();
static RawNativeFunction getConstructFunction();
static GetValueFunc getStaticFunctionGetter();
static GetValueFunc getCallbackGetter();
JSValue getStaticValue(JSGlobalObject*, PropertyName);
std::unique_ptr<JSCallbackObjectData> m_callbackObjectData;
const ClassInfo* m_classInfo { nullptr };
};
template <class Parent>
template<typename Visitor>
void JSCallbackObject<Parent>::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
JSCallbackObject* thisObject = uncheckedDowncast<JSCallbackObject>(cell);
ASSERT_GC_OBJECT_INHERITS((static_cast<Parent*>(thisObject)), JSCallbackObject<Parent>::info());
Parent::visitChildren(thisObject, visitor);
thisObject->m_callbackObjectData->visitChildren(visitor);
}
// JSCallbackObject<T>::info()'s forward definition triggers an undefined template var warning
// without these declarations in the same translation unit.
template<> const ClassInfo JSCallbackObject<JSGlobalObject>::s_info;
template<> const ClassInfo JSCallbackObject<JSNonFinalObject>::s_info;
#if defined(JSC_GLIB_API_ENABLED)
template<> const ClassInfo JSCallbackObject<JSAPIWrapperGlobalObject>::s_info;
#endif
#if JSC_OBJC_API_ENABLED || defined(JSC_GLIB_API_ENABLED)
template<> const ClassInfo JSCallbackObject<JSAPIWrapperObject>::s_info;
#endif
} // namespace JSC
// include the actual template class implementation
#include "JSCallbackObjectFunctions.h"
#endif // JSCallbackObject_h