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/*
* Copyright (C) 2018 Igalia S.L.
* Copyright (C) 2013-2022 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. 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 INC. 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.
*/
#include "config.h"
#include "JSAPIWrapperObject.h"
#include "AbstractSlotVisitor.h"
#include "JSCGLibWrapperObject.h"
#include "JSCInlines.h"
#include "JSCallbackObject.h"
#include "Structure.h"
#include <wtf/NeverDestroyed.h>
class JSAPIWrapperObjectHandleOwner final : public JSC::WeakHandleOwner {
public:
void finalize(JSC::Handle<JSC::Unknown>, void*) final;
bool isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, JSC::AbstractSlotVisitor&, ASCIILiteral*) final;
};
static JSAPIWrapperObjectHandleOwner* jsAPIWrapperObjectHandleOwner()
{
static NeverDestroyed<JSAPIWrapperObjectHandleOwner> jsWrapperObjectHandleOwner;
return &jsWrapperObjectHandleOwner.get();
}
void JSAPIWrapperObjectHandleOwner::finalize(JSC::Handle<JSC::Unknown> handle, void*)
{
auto* wrapperObject = static_cast<JSC::JSAPIWrapperObject*>(handle.get().asCell());
if (!wrapperObject->wrappedObject())
return;
JSC::Heap::heap(wrapperObject)->releaseSoon(std::unique_ptr<JSC::JSCGLibWrapperObject>(static_cast<JSC::JSCGLibWrapperObject*>(wrapperObject->wrappedObject())));
JSC::WeakSet::deallocate(JSC::WeakImpl::asWeakImpl(handle.slot()));
}
bool JSAPIWrapperObjectHandleOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, JSC::AbstractSlotVisitor& visitor, ASCIILiteral*)
{
JSC::JSAPIWrapperObject* wrapperObject = JSC::jsCast<JSC::JSAPIWrapperObject*>(handle.get().asCell());
// We use the JSGlobalObject when processing weak handles to prevent the situation where using
// the same wrapped object in multiple global objects keeps all of the global objects alive.
if (!wrapperObject->wrappedObject())
return false;
return visitor.vm().heap.isMarked(wrapperObject->structure()->globalObject()) && visitor.containsOpaqueRoot(wrapperObject->wrappedObject());
}
namespace JSC {
static JSC_DECLARE_HOST_FUNCTION(callJSAPIWrapperObjectCallbackObject);
static JSC_DECLARE_HOST_FUNCTION(constructJSAPIWrapperObjectCallbackObject);
static JSC_DECLARE_CUSTOM_GETTER(callbackGetterJSAPIWrapperObjectCallbackObject);
static JSC_DECLARE_CUSTOM_GETTER(staticFunctionGetterJSAPIWrapperObjectCallbackObject);
DEFINE_VISIT_CHILDREN_WITH_MODIFIER(template<>, JSCallbackObject<JSAPIWrapperObject>);
template <> const ClassInfo JSCallbackObject<JSAPIWrapperObject>::s_info = { "JSAPIWrapperObject"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSCallbackObject) };
template<> const DestructionMode JSCallbackObject<JSAPIWrapperObject>::needsDestruction = NeedsDestruction;
template <>
NativeFunction::Ptr JSCallbackObject<JSAPIWrapperObject>::getCallFunction()
{
return callJSAPIWrapperObjectCallbackObject;
}
template <>
NativeFunction::Ptr JSCallbackObject<JSAPIWrapperObject>::getConstructFunction()
{
return constructJSAPIWrapperObjectCallbackObject;
}
template <>
GetValueFunc JSCallbackObject<JSAPIWrapperObject>::getCallbackGetter()
{
return callbackGetterJSAPIWrapperObjectCallbackObject;
}
template <>
GetValueFunc JSCallbackObject<JSAPIWrapperObject>::getStaticFunctionGetter()
{
return staticFunctionGetterJSAPIWrapperObjectCallbackObject;
}
template <>
GCClient::IsoSubspace* JSCallbackObject<JSAPIWrapperObject>::subspaceForImpl(VM& vm, SubspaceAccess mode)
{
switch (mode) {
case SubspaceAccess::OnMainThread:
return vm.apiWrapperObjectSpace<SubspaceAccess::OnMainThread>();
case SubspaceAccess::Concurrently:
return vm.apiWrapperObjectSpace<SubspaceAccess::Concurrently>();
}
RELEASE_ASSERT_NOT_REACHED();
return nullptr;
}
template <>
Structure* JSCallbackObject<JSAPIWrapperObject>::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
{
return Structure::create(vm, globalObject, proto, TypeInfo(ObjectType, StructureFlags), &s_info);
}
JSC_DEFINE_HOST_FUNCTION(callJSAPIWrapperObjectCallbackObject, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSCallbackObject<JSAPIWrapperObject>::callImpl(globalObject, callFrame);
}
JSC_DEFINE_HOST_FUNCTION(constructJSAPIWrapperObjectCallbackObject, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSCallbackObject<JSAPIWrapperObject>::constructImpl(globalObject, callFrame);
}
JSC_DEFINE_CUSTOM_GETTER(callbackGetterJSAPIWrapperObjectCallbackObject, (JSGlobalObject* globalObject, EncodedJSValue thisValue, PropertyName propertyName))
{
return JSCallbackObject<JSAPIWrapperObject>::callbackGetterImpl(globalObject, thisValue, propertyName);
}
JSC_DEFINE_CUSTOM_GETTER(staticFunctionGetterJSAPIWrapperObjectCallbackObject, (JSGlobalObject* globalObject, EncodedJSValue thisValue, PropertyName propertyName))
{
return JSCallbackObject<JSAPIWrapperObject>::staticFunctionGetterImpl(globalObject, thisValue, propertyName);
}
JSAPIWrapperObject::JSAPIWrapperObject(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
void JSAPIWrapperObject::finishCreation(VM& vm)
{
Base::finishCreation(vm);
WeakSet::allocate(this, jsAPIWrapperObjectHandleOwner(), 0); // Balanced in JSAPIWrapperObjectHandleOwner::finalize.
}
void JSAPIWrapperObject::setWrappedObject(void* wrappedObject)
{
ASSERT(!m_wrappedObject);
m_wrappedObject = wrappedObject;
}
template<typename Visitor>
void JSAPIWrapperObject::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
Base::visitChildren(cell, visitor);
}
DEFINE_VISIT_CHILDREN_WITH_MODIFIER(JS_EXPORT_PRIVATE, JSAPIWrapperObject);
} // namespace JSC
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