--- /dev/null
+/*
+ * Copyright (C) 2015 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. ``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 GenericArgumentsInlines_h
+#define GenericArgumentsInlines_h
+
+#include "GenericArguments.h"
+#include "JSCInlines.h"
+
+namespace JSC {
+
+template<typename Type>
+bool GenericArguments<Type>::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName ident, PropertySlot& slot)
+{
+ Type* thisObject = jsCast<Type*>(object);
+ VM& vm = exec->vm();
+
+ if (!thisObject->overrodeThings()) {
+ if (ident == vm.propertyNames->length) {
+ slot.setValue(thisObject, DontEnum, jsNumber(thisObject->internalLength()));
+ return true;
+ }
+ if (ident == vm.propertyNames->callee) {
+ slot.setValue(thisObject, DontEnum, thisObject->callee().get());
+ return true;
+ }
+ if (ident == vm.propertyNames->iteratorSymbol) {
+ slot.setValue(thisObject, DontEnum, thisObject->globalObject()->arrayProtoValuesFunction());
+ return true;
+ }
+ }
+
+ Optional<uint32_t> index = parseIndex(ident);
+ if (index && thisObject->canAccessIndexQuickly(index.value())) {
+ slot.setValue(thisObject, None, thisObject->getIndexQuickly(index.value()));
+ return true;
+ }
+
+ return Base::getOwnPropertySlot(thisObject, exec, ident, slot);
+}
+
+template<typename Type>
+bool GenericArguments<Type>::getOwnPropertySlotByIndex(JSObject* object, ExecState* exec, unsigned index, PropertySlot& slot)
+{
+ Type* thisObject = jsCast<Type*>(object);
+
+ if (thisObject->canAccessIndexQuickly(index)) {
+ slot.setValue(thisObject, None, thisObject->getIndexQuickly(index));
+ return true;
+ }
+
+ return Base::getOwnPropertySlotByIndex(object, exec, index, slot);
+}
+
+template<typename Type>
+void GenericArguments<Type>::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& array, EnumerationMode mode)
+{
+ Type* thisObject = jsCast<Type*>(object);
+
+ for (unsigned i = 0; i < thisObject->internalLength(); ++i) {
+ if (!thisObject->canAccessIndexQuickly(i))
+ continue;
+ array.add(Identifier::from(exec, i));
+ }
+ if (mode.includeDontEnumProperties() && !thisObject->overrodeThings()) {
+ array.add(exec->propertyNames().length);
+ array.add(exec->propertyNames().callee);
+ if (mode.includeSymbolProperties())
+ array.add(exec->propertyNames().iteratorSymbol);
+ }
+ Base::getOwnPropertyNames(thisObject, exec, array, mode);
+}
+
+template<typename Type>
+void GenericArguments<Type>::put(JSCell* cell, ExecState* exec, PropertyName ident, JSValue value, PutPropertySlot& slot)
+{
+ Type* thisObject = jsCast<Type*>(cell);
+ VM& vm = exec->vm();
+
+ if (!thisObject->overrodeThings()
+ && (ident == vm.propertyNames->length
+ || ident == vm.propertyNames->callee
+ || ident == vm.propertyNames->iteratorSymbol)) {
+ thisObject->overrideThings(vm);
+ PutPropertySlot dummy = slot; // This put is not cacheable, so we shadow the slot that was given to us.
+ Base::put(thisObject, exec, ident, value, dummy);
+ return;
+ }
+
+ Optional<uint32_t> index = parseIndex(ident);
+ if (index && thisObject->canAccessIndexQuickly(index.value())) {
+ thisObject->setIndexQuickly(vm, index.value(), value);
+ return;
+ }
+
+ Base::put(thisObject, exec, ident, value, slot);
+}
+
+template<typename Type>
+void GenericArguments<Type>::putByIndex(JSCell* cell, ExecState* exec, unsigned index, JSValue value, bool shouldThrow)
+{
+ Type* thisObject = jsCast<Type*>(cell);
+ VM& vm = exec->vm();
+
+ if (thisObject->canAccessIndexQuickly(index)) {
+ thisObject->setIndexQuickly(vm, index, value);
+ return;
+ }
+
+ return Base::putByIndex(cell, exec, index, value, shouldThrow);
+}
+
+template<typename Type>
+bool GenericArguments<Type>::deleteProperty(JSCell* cell, ExecState* exec, PropertyName ident)
+{
+ Type* thisObject = jsCast<Type*>(cell);
+ VM& vm = exec->vm();
+
+ if (!thisObject->overrodeThings()
+ && (ident == vm.propertyNames->length
+ || ident == vm.propertyNames->callee
+ || ident == vm.propertyNames->iteratorSymbol))
+ thisObject->overrideThings(vm);
+
+ Optional<uint32_t> index = parseIndex(ident);
+ if (index && thisObject->canAccessIndexQuickly(index.value())) {
+ thisObject->overrideArgument(vm, index.value());
+ return true;
+ }
+
+ return Base::deleteProperty(thisObject, exec, ident);
+}
+
+template<typename Type>
+bool GenericArguments<Type>::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned index)
+{
+ Type* thisObject = jsCast<Type*>(cell);
+ VM& vm = exec->vm();
+
+ if (thisObject->canAccessIndexQuickly(index)) {
+ thisObject->overrideArgument(vm, index);
+ return true;
+ }
+
+ return Base::deletePropertyByIndex(cell, exec, index);
+}
+
+template<typename Type>
+bool GenericArguments<Type>::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName ident, const PropertyDescriptor& descriptor, bool shouldThrow)
+{
+ Type* thisObject = jsCast<Type*>(object);
+ VM& vm = exec->vm();
+
+ if (ident == vm.propertyNames->length
+ || ident == vm.propertyNames->callee
+ || ident == vm.propertyNames->iteratorSymbol)
+ thisObject->overrideThingsIfNecessary(vm);
+ else {
+ Optional<uint32_t> optionalIndex = parseIndex(ident);
+ if (optionalIndex && thisObject->canAccessIndexQuickly(optionalIndex.value())) {
+ uint32_t index = optionalIndex.value();
+ if (!descriptor.isAccessorDescriptor()) {
+ // If the property is not deleted and we are using a non-accessor descriptor, then
+ // make sure that the aliased argument sees the value.
+ if (descriptor.value())
+ thisObject->setIndexQuickly(vm, index, descriptor.value());
+
+ // If the property is not deleted and we are using a non-accessor, writable
+ // descriptor, then we are done. The argument continues to be aliased. Note that we
+ // ignore the request to change enumerability. We appear to have always done so, in
+ // cases where the argument was still aliased.
+ // FIXME: https://bugs.webkit.org/show_bug.cgi?id=141952
+ if (descriptor.writable())
+ return true;
+ }
+
+ // If the property is a non-deleted argument, then move it into the base object and
+ // then delete it.
+ JSValue value = thisObject->getIndexQuickly(index);
+ ASSERT(value);
+ object->putDirectMayBeIndex(exec, ident, value);
+ thisObject->overrideArgument(vm, index);
+ }
+ }
+
+ // Now just let the normal object machinery do its thing.
+ return Base::defineOwnProperty(object, exec, ident, descriptor, shouldThrow);
+}
+
+template<typename Type>
+void GenericArguments<Type>::copyToArguments(ExecState* exec, VirtualRegister firstElementDest, unsigned offset, unsigned length)
+{
+ Type* thisObject = static_cast<Type*>(this);
+ for (unsigned i = 0; i < length; ++i) {
+ if (thisObject->canAccessIndexQuickly(i + offset))
+ exec->r(firstElementDest + i) = thisObject->getIndexQuickly(i + offset);
+ else {
+ exec->r(firstElementDest + i) = get(exec, i + offset);
+ if (UNLIKELY(exec->vm().exception()))
+ return;
+ }
+ }
+}
+
+} // namespace JSC
+
+#endif // GenericArgumentsInlines_h
+
projects / apple / javascriptcore.git / blobdiff