| /* |
| * Copyright (C) 2013-2021 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. 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. |
| */ |
| |
| #import "config.h" |
| #import "JSAPIWrapperObject.h" |
| |
| #import "JSCInlines.h" |
| #import "JSCallbackObject.h" |
| #import "JSVirtualMachineInternal.h" |
| #import "Structure.h" |
| #import <wtf/NeverDestroyed.h> |
| |
| #if JSC_OBJC_API_ENABLED |
| |
| 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&, const char**) final; |
| }; |
| |
| static JSAPIWrapperObjectHandleOwner* jsAPIWrapperObjectHandleOwner() |
| { |
| static NeverDestroyed<JSAPIWrapperObjectHandleOwner> jsWrapperObjectHandleOwner; |
| return &jsWrapperObjectHandleOwner.get(); |
| } |
| |
| void JSAPIWrapperObjectHandleOwner::finalize(JSC::Handle<JSC::Unknown> handle, void*) |
| { |
| JSC::JSAPIWrapperObject* wrapperObject = static_cast<JSC::JSAPIWrapperObject*>(handle.get().asCell()); |
| if (!wrapperObject->wrappedObject()) |
| return; |
| |
| JSC::Heap::heap(wrapperObject)->releaseSoon(adoptNS(static_cast<id>(wrapperObject->wrappedObject()))); |
| JSC::WeakSet::deallocate(JSC::WeakImpl::asWeakImpl(handle.slot())); |
| } |
| |
| bool JSAPIWrapperObjectHandleOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, JSC::AbstractSlotVisitor& 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 Objective-C object in multiple global objects keeps all of the global objects alive. |
| if (!wrapperObject->wrappedObject()) |
| return false; |
| return visitor.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", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSCallbackObject) }; |
| template <> const bool JSCallbackObject<JSAPIWrapperObject>::needsDestruction = true; |
| |
| template <> |
| RawNativeFunction JSCallbackObject<JSAPIWrapperObject>::getCallFunction() |
| { |
| return callJSAPIWrapperObjectCallbackObject; |
| } |
| |
| template <> |
| RawNativeFunction JSCallbackObject<JSAPIWrapperObject>::getConstructFunction() |
| { |
| return constructJSAPIWrapperObjectCallbackObject; |
| } |
| |
| template <> |
| PropertySlot::GetValueFunc JSCallbackObject<JSAPIWrapperObject>::getCallbackGetter() |
| { |
| return callbackGetterJSAPIWrapperObjectCallbackObject; |
| } |
| |
| template <> |
| PropertySlot::GetValueFunc JSCallbackObject<JSAPIWrapperObject>::getStaticFunctionGetter() |
| { |
| return staticFunctionGetterJSAPIWrapperObjectCallbackObject; |
| } |
| |
| 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 = [static_cast<id>(wrappedObject) retain]; |
| } |
| |
| template<typename Visitor> |
| void JSAPIWrapperObject::visitChildrenImpl(JSCell* cell, Visitor& visitor) |
| { |
| JSAPIWrapperObject* thisObject = JSC::jsCast<JSAPIWrapperObject*>(cell); |
| Base::visitChildren(cell, visitor); |
| |
| void* wrappedObject = thisObject->wrappedObject(); |
| if (wrappedObject) |
| scanExternalObjectGraph(visitor.vm(), visitor, wrappedObject); |
| } |
| |
| DEFINE_VISIT_CHILDREN_WITH_MODIFIER(JS_EXPORT_PRIVATE, JSAPIWrapperObject); |
| |
| 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; |
| } |
| |
| 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); |
| } |
| |
| } // namespace JSC |
| |
| #endif // JSC_OBJC_API_ENABLED |