mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-14 21:10:01 +00:00
238 lines
9.1 KiB
C++
238 lines
9.1 KiB
C++
/*
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* Copyright (C) 2015-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "GenericArguments.h"
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#include "JSCInlines.h"
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namespace JSC {
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template<typename Type>
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bool GenericArguments<Type>::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName ident, PropertySlot& slot)
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{
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Type* thisObject = jsCast<Type*>(object);
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VM& vm = exec->vm();
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if (!thisObject->overrodeThings()) {
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if (ident == vm.propertyNames->length) {
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slot.setValue(thisObject, DontEnum, jsNumber(thisObject->internalLength()));
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return true;
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}
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if (ident == vm.propertyNames->callee) {
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slot.setValue(thisObject, DontEnum, thisObject->callee().get());
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return true;
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}
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if (ident == vm.propertyNames->iteratorSymbol) {
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slot.setValue(thisObject, DontEnum, thisObject->globalObject()->arrayProtoValuesFunction());
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return true;
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}
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}
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std::optional<uint32_t> index = parseIndex(ident);
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if (index && thisObject->canAccessIndexQuickly(index.value())) {
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slot.setValue(thisObject, None, thisObject->getIndexQuickly(index.value()));
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return true;
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}
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return Base::getOwnPropertySlot(thisObject, exec, ident, slot);
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}
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template<typename Type>
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bool GenericArguments<Type>::getOwnPropertySlotByIndex(JSObject* object, ExecState* exec, unsigned index, PropertySlot& slot)
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{
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Type* thisObject = jsCast<Type*>(object);
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if (thisObject->canAccessIndexQuickly(index)) {
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JSValue result = thisObject->getIndexQuickly(index);
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slot.setValue(thisObject, None, result);
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return true;
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}
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bool result = Base::getOwnPropertySlotByIndex(object, exec, index, slot);
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return result;
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}
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template<typename Type>
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void GenericArguments<Type>::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& array, EnumerationMode mode)
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{
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Type* thisObject = jsCast<Type*>(object);
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if (array.includeStringProperties()) {
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for (unsigned i = 0; i < thisObject->internalLength(); ++i) {
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if (!thisObject->canAccessIndexQuickly(i))
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continue;
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array.add(Identifier::from(exec, i));
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}
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}
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if (mode.includeDontEnumProperties() && !thisObject->overrodeThings()) {
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array.add(exec->propertyNames().length);
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array.add(exec->propertyNames().callee);
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if (array.includeSymbolProperties())
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array.add(exec->propertyNames().iteratorSymbol);
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}
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Base::getOwnPropertyNames(thisObject, exec, array, mode);
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}
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template<typename Type>
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bool GenericArguments<Type>::put(JSCell* cell, ExecState* exec, PropertyName ident, JSValue value, PutPropertySlot& slot)
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{
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Type* thisObject = jsCast<Type*>(cell);
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VM& vm = exec->vm();
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if (!thisObject->overrodeThings()
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&& (ident == vm.propertyNames->length
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|| ident == vm.propertyNames->callee
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|| ident == vm.propertyNames->iteratorSymbol)) {
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thisObject->overrideThings(vm);
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PutPropertySlot dummy = slot; // This put is not cacheable, so we shadow the slot that was given to us.
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return Base::put(thisObject, exec, ident, value, dummy);
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}
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// https://tc39.github.io/ecma262/#sec-arguments-exotic-objects-set-p-v-receiver
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// Fall back to the OrdinarySet when the receiver is altered from the thisObject.
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if (UNLIKELY(isThisValueAltered(slot, thisObject)))
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return ordinarySetSlow(exec, thisObject, ident, value, slot.thisValue(), slot.isStrictMode());
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std::optional<uint32_t> index = parseIndex(ident);
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if (index && thisObject->canAccessIndexQuickly(index.value())) {
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thisObject->setIndexQuickly(vm, index.value(), value);
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return true;
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}
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return Base::put(thisObject, exec, ident, value, slot);
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}
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template<typename Type>
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bool GenericArguments<Type>::putByIndex(JSCell* cell, ExecState* exec, unsigned index, JSValue value, bool shouldThrow)
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{
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Type* thisObject = jsCast<Type*>(cell);
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VM& vm = exec->vm();
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if (thisObject->canAccessIndexQuickly(index)) {
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thisObject->setIndexQuickly(vm, index, value);
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return true;
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}
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return Base::putByIndex(cell, exec, index, value, shouldThrow);
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}
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template<typename Type>
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bool GenericArguments<Type>::deleteProperty(JSCell* cell, ExecState* exec, PropertyName ident)
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{
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Type* thisObject = jsCast<Type*>(cell);
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VM& vm = exec->vm();
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if (!thisObject->overrodeThings()
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&& (ident == vm.propertyNames->length
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|| ident == vm.propertyNames->callee
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|| ident == vm.propertyNames->iteratorSymbol))
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thisObject->overrideThings(vm);
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std::optional<uint32_t> index = parseIndex(ident);
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if (index && thisObject->canAccessIndexQuickly(index.value())) {
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thisObject->overrideArgument(vm, index.value());
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return true;
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}
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return Base::deleteProperty(thisObject, exec, ident);
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}
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template<typename Type>
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bool GenericArguments<Type>::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned index)
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{
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Type* thisObject = jsCast<Type*>(cell);
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VM& vm = exec->vm();
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if (thisObject->canAccessIndexQuickly(index)) {
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thisObject->overrideArgument(vm, index);
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return true;
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}
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return Base::deletePropertyByIndex(cell, exec, index);
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}
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template<typename Type>
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bool GenericArguments<Type>::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName ident, const PropertyDescriptor& descriptor, bool shouldThrow)
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{
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Type* thisObject = jsCast<Type*>(object);
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VM& vm = exec->vm();
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if (ident == vm.propertyNames->length
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|| ident == vm.propertyNames->callee
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|| ident == vm.propertyNames->iteratorSymbol)
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thisObject->overrideThingsIfNecessary(vm);
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else {
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std::optional<uint32_t> optionalIndex = parseIndex(ident);
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if (optionalIndex && thisObject->canAccessIndexQuickly(optionalIndex.value())) {
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uint32_t index = optionalIndex.value();
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if (!descriptor.isAccessorDescriptor()) {
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// If the property is not deleted and we are using a non-accessor descriptor, then
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// make sure that the aliased argument sees the value.
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if (descriptor.value())
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thisObject->setIndexQuickly(vm, index, descriptor.value());
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// If the property is not deleted and we are using a non-accessor, writable
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// descriptor, then we are done. The argument continues to be aliased. Note that we
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// ignore the request to change enumerability. We appear to have always done so, in
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// cases where the argument was still aliased.
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// FIXME: https://bugs.webkit.org/show_bug.cgi?id=141952
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if (descriptor.writable())
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return true;
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}
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// If the property is a non-deleted argument, then move it into the base object and
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// then delete it.
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JSValue value = thisObject->getIndexQuickly(index);
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ASSERT(value);
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object->putDirectMayBeIndex(exec, ident, value);
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thisObject->overrideArgument(vm, index);
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}
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}
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// Now just let the normal object machinery do its thing.
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return Base::defineOwnProperty(object, exec, ident, descriptor, shouldThrow);
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}
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template<typename Type>
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void GenericArguments<Type>::copyToArguments(ExecState* exec, VirtualRegister firstElementDest, unsigned offset, unsigned length)
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{
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VM& vm = exec->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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Type* thisObject = static_cast<Type*>(this);
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for (unsigned i = 0; i < length; ++i) {
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if (thisObject->canAccessIndexQuickly(i + offset))
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exec->r(firstElementDest + i) = thisObject->getIndexQuickly(i + offset);
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else {
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exec->r(firstElementDest + i) = get(exec, i + offset);
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RETURN_IF_EXCEPTION(scope, void());
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}
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}
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}
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} // namespace JSC
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