| /* |
| * Copyright (C) 2018 Igalia S.L. |
| * Copyright (C) 2013-2018 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 "JSCGLibWrapperObject.h" |
| #include "JSCInlines.h" |
| #include "JSCallbackObject.h" |
| #include "Structure.h" |
| #include <wtf/NeverDestroyed.h> |
| |
| class JSAPIWrapperObjectHandleOwner : public JSC::WeakHandleOwner { |
| public: |
| void finalize(JSC::Handle<JSC::Unknown>, void*) override; |
| bool isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, JSC::SlotVisitor&, const char**) override; |
| }; |
| |
| 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::SlotVisitor& visitor, const char**) |
| { |
| 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 { |
| |
| template <> const ClassInfo JSCallbackObject<JSAPIWrapperObject>::s_info = { "JSAPIWrapperObject", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSCallbackObject) }; |
| |
| template<> const bool JSCallbackObject<JSAPIWrapperObject>::needsDestruction = true; |
| |
| template <> |
| 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); |
| } |
| |
| 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; |
| } |
| |
| void JSAPIWrapperObject::visitChildren(JSCell* cell, JSC::SlotVisitor& visitor) |
| { |
| Base::visitChildren(cell, visitor); |
| } |
| |
| } // namespace JSC |