mirror of
https://github.com/Samsung/escargot.git
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28de827199
* Update build spec file * Add License files Signed-off-by: Seungsoo Lee <seungsoo47.lee@samsung.com>
1058 lines
44 KiB
C++
1058 lines
44 KiB
C++
/*
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* Copyright (c) 2016-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#include "Escargot.h"
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#include "Object.h"
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#include "ExecutionContext.h"
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#include "Context.h"
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#include "VMInstance.h"
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#include "ErrorObject.h"
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#include "FunctionObject.h"
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#include "ArrayObject.h"
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#include "util/Util.h"
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namespace Escargot {
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PropertyName::PropertyName(ExecutionState& state, const Value& valueIn)
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{
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Value value = valueIn.toPrimitive(state, Value::PreferString);
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if (UNLIKELY(value.isSymbol())) {
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m_data = (size_t)value.asSymbol();
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return;
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}
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String* string = value.toString(state);
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StringBufferAccessData data = string->bufferAccessData();
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if (data.length == 0) {
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m_data = ((size_t)AtomicString().string()) | PROPERTY_NAME_ATOMIC_STRING_VIAS;
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return;
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}
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bool needsRemainNormalString = false;
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char16_t c = data.has8BitContent ? ((LChar*)data.buffer)[0] : ((char16_t*)data.buffer)[0];
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if ((c == '.' || (c >= '0' && c <= '9')) && data.length > 16) {
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needsRemainNormalString = true;
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}
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if (UNLIKELY(needsRemainNormalString)) {
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m_data = (size_t)string;
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} else {
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if (c < ESCARGOT_ASCII_TABLE_MAX && (data.length == 1)) {
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m_data = ((size_t)state.context()->staticStrings().asciiTable[c].string()) | PROPERTY_NAME_ATOMIC_STRING_VIAS;
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} else {
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m_data = ((size_t)AtomicString(state, string).string()) | PROPERTY_NAME_ATOMIC_STRING_VIAS;
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}
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}
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}
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size_t g_objectRareDataTag;
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ObjectRareData::ObjectRareData(Object* obj)
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{
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if (obj)
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m_prototype = obj->m_prototype;
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else
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m_prototype = nullptr;
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m_isExtensible = true;
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m_isEverSetAsPrototypeObject = false;
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m_isFastModeArrayObject = true;
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m_shouldUpdateEnumerateObjectData = false;
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m_isInArrayObjectDefineOwnProperty = false;
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m_hasNonWritableLastIndexRegexpObject = false;
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m_extraData = nullptr;
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#ifdef ESCARGOT_ENABLE_PROMISE
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m_internalSlot = nullptr;
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#endif
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}
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void* ObjectRareData::operator new(size_t size)
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{
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static bool typeInited = false;
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static GC_descr descr;
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if (!typeInited) {
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GC_word obj_bitmap[GC_BITMAP_SIZE(ObjectRareData)] = { 0 };
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GC_set_bit(obj_bitmap, GC_WORD_OFFSET(ObjectRareData, m_prototype));
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GC_set_bit(obj_bitmap, GC_WORD_OFFSET(ObjectRareData, m_extraData));
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#ifdef ESCARGOT_ENABLE_PROMISE
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GC_set_bit(obj_bitmap, GC_WORD_OFFSET(ObjectRareData, m_internalSlot));
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#endif
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descr = GC_make_descriptor(obj_bitmap, GC_WORD_LEN(ObjectRareData));
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typeInited = true;
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}
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return GC_MALLOC_EXPLICITLY_TYPED(size, descr);
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}
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Value ObjectGetResult::valueSlowCase(ExecutionState& state, const Value& receiver) const
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{
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#ifdef ESCARGOT_32
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if (m_jsGetterSetter->getter().isFunction()) {
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#else
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if (m_jsGetterSetter->hasGetter() && m_jsGetterSetter->getter().isFunction()) {
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#endif
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return m_jsGetterSetter->getter().asFunction()->call(state, receiver, 0, nullptr);
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}
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return Value();
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}
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Value ObjectGetResult::toPropertyDescriptor(ExecutionState& state, const Value& receiver)
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{
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// If Desc is undefined, then return undefined.
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if (!hasValue()) {
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return Value();
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}
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// Let obj be the result of creating a new object as if by the expression new Object() where Object is the standard built-in constructor with that name.
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Object* obj = new Object(state);
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// If IsDataDescriptor(Desc) is true, then
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if (isDataProperty()) {
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "value", Property Descriptor {[[Value]]: Desc.[[Value]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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obj->defineOwnProperty(state, ObjectPropertyName(state.context()->staticStrings().value), ObjectPropertyDescriptor(this->value(state, receiver), ObjectPropertyDescriptor::AllPresent));
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "writable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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obj->defineOwnProperty(state, ObjectPropertyName(state.context()->staticStrings().writable), ObjectPropertyDescriptor(Value(isWritable()), ObjectPropertyDescriptor::AllPresent));
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} else {
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Value get;
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if (jsGetterSetter()->hasGetter())
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get = jsGetterSetter()->getter();
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Value set;
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if (jsGetterSetter()->hasSetter())
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set = jsGetterSetter()->setter();
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "get", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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obj->defineOwnProperty(state, ObjectPropertyName(state.context()->staticStrings().get), ObjectPropertyDescriptor(get, ObjectPropertyDescriptor::AllPresent));
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "set", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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obj->defineOwnProperty(state, ObjectPropertyName(state.context()->staticStrings().set), ObjectPropertyDescriptor(set, ObjectPropertyDescriptor::AllPresent));
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}
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "enumerable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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obj->defineOwnProperty(state, ObjectPropertyName(state.context()->staticStrings().enumerable), ObjectPropertyDescriptor(Value(isEnumerable()), ObjectPropertyDescriptor::AllPresent));
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "configurable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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obj->defineOwnProperty(state, ObjectPropertyName(state.context()->staticStrings().configurable), ObjectPropertyDescriptor(Value(isConfigurable()), ObjectPropertyDescriptor::AllPresent));
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return obj;
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}
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ObjectPropertyDescriptor::ObjectPropertyDescriptor(ExecutionState& state, Object* obj)
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: m_isDataProperty(true)
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{
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m_property = NotPresent;
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const StaticStrings* strings = &state.context()->staticStrings();
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auto desc = obj->get(state, ObjectPropertyName(strings->enumerable));
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if (desc.hasValue())
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setEnumerable(desc.value(state, obj).toBoolean(state));
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desc = obj->get(state, ObjectPropertyName(strings->configurable));
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if (desc.hasValue())
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setConfigurable(desc.value(state, obj).toBoolean(state));
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bool hasValue = false;
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desc = obj->get(state, ObjectPropertyName(strings->value));
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if (desc.hasValue()) {
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setValue(desc.value(state, obj));
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hasValue = true;
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}
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bool hasWritable = false;
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desc = obj->get(state, ObjectPropertyName(strings->writable));
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if (desc.hasValue()) {
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setWritable(desc.value(state, obj).toBoolean(state));
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hasWritable = true;
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}
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desc = obj->get(state, ObjectPropertyName(strings->get));
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if (desc.hasValue()) {
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Value getter = desc.value(state, obj);
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if (!getter.isFunction() && !getter.isUndefined()) {
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ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "Getter must be a function or undefined");
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} else {
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m_isDataProperty = false;
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m_getterSetter = JSGetterSetter(getter, Value(Value::EmptyValue));
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}
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}
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desc = obj->get(state, ObjectPropertyName(strings->set));
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if (desc.hasValue()) {
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Value setter = desc.value(state, obj);
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if (!setter.isFunction() && !setter.isUndefined()) {
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ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "Setter must be a function or undefined");
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} else {
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if (m_isDataProperty) {
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m_isDataProperty = false;
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m_getterSetter = JSGetterSetter(Value(Value::EmptyValue), setter);
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} else {
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m_getterSetter.m_setter = setter;
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}
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}
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}
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if (!m_isDataProperty) {
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if (hasWritable | hasValue) {
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ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "Invalid property descriptor. Cannot both specify accessors and a value or writable attribute");
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}
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}
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checkProperty();
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}
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void ObjectPropertyDescriptor::setEnumerable(bool enumerable)
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{
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if (enumerable) {
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m_property = (PresentAttribute)(m_property | EnumerablePresent);
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m_property = (PresentAttribute)(m_property & ~NonEnumerablePresent);
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} else {
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m_property = (PresentAttribute)(m_property | NonEnumerablePresent);
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m_property = (PresentAttribute)(m_property & ~EnumerablePresent);
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}
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}
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void ObjectPropertyDescriptor::setConfigurable(bool configurable)
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{
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if (configurable) {
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m_property = (PresentAttribute)(m_property | ConfigurablePresent);
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m_property = (PresentAttribute)(m_property & ~NonConfigurablePresent);
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} else {
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m_property = (PresentAttribute)(m_property | NonConfigurablePresent);
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m_property = (PresentAttribute)(m_property & ~ConfigurablePresent);
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}
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}
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void ObjectPropertyDescriptor::setWritable(bool writable)
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{
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if (writable) {
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m_property = (PresentAttribute)(m_property | WritablePresent);
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m_property = (PresentAttribute)(m_property & ~NonWritablePresent);
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} else {
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m_property = (PresentAttribute)(m_property | NonWritablePresent);
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m_property = (PresentAttribute)(m_property & ~WritablePresent);
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}
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}
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void ObjectPropertyDescriptor::setValue(const Value& v)
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{
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m_property = (PresentAttribute)(m_property | ValuePresent);
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m_value = v;
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}
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ObjectStructurePropertyDescriptor ObjectPropertyDescriptor::toObjectStructurePropertyDescriptor() const
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{
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if (isDataProperty()) {
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int f = 0;
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if (isWritable()) {
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f = ObjectStructurePropertyDescriptor::WritablePresent;
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}
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if (isConfigurable()) {
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f |= ObjectStructurePropertyDescriptor::ConfigurablePresent;
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}
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if (isEnumerable()) {
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f |= ObjectStructurePropertyDescriptor::EnumerablePresent;
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}
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return ObjectStructurePropertyDescriptor::createDataDescriptor((ObjectStructurePropertyDescriptor::PresentAttribute)f);
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} else {
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int f = 0;
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if (isConfigurable()) {
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f |= ObjectStructurePropertyDescriptor::ConfigurablePresent;
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}
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if (isEnumerable()) {
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f |= ObjectStructurePropertyDescriptor::EnumerablePresent;
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}
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if (hasJSGetter()) {
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f |= ObjectStructurePropertyDescriptor::HasJSGetter;
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}
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if (hasJSSetter()) {
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f |= ObjectStructurePropertyDescriptor::HasJSSetter;
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}
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return ObjectStructurePropertyDescriptor::createAccessorDescriptor((ObjectStructurePropertyDescriptor::PresentAttribute)f);
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}
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}
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ObjectPropertyDescriptor ObjectPropertyDescriptor::fromObjectStructurePropertyDescriptor(const ObjectStructurePropertyDescriptor& desc, const Value& value)
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{
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const ObjectPropertyDescriptor::PresentAttribute flag = ObjectPropertyDescriptor::NotPresent;
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// If IsDataDescriptor(Desc) is true, then
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if (desc.isDataProperty()) {
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "value", Property Descriptor {[[Value]]: Desc.[[Value]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ObjectPropertyDescriptor ret(value, flag);
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "writable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ret.setWritable(desc.isWritable());
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "enumerable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ret.setEnumerable(desc.isEnumerable());
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "configurable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ret.setConfigurable(desc.isConfigurable());
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return ret;
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} else {
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "get", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "set", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ObjectPropertyDescriptor ret(*value.asPointerValue()->asJSGetterSetter(), flag);
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "enumerable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ret.setEnumerable(desc.isEnumerable());
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// Call the [[DefineOwnProperty]] internal method of obj with arguments "configurable", Property Descriptor {[[Value]]: Desc.[[Writable]], [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
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ret.setConfigurable(desc.isConfigurable());
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return ret;
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}
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}
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size_t g_objectTag;
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Object::Object(ExecutionState& state, size_t defaultSpace, bool initPlainArea)
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: m_structure(state.context()->defaultStructureForObject())
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{
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m_values.resizeWithUninitializedValues(0, defaultSpace);
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if (initPlainArea) {
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initPlainObject(state);
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}
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}
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Object::Object(ExecutionState& state)
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: m_structure(state.context()->defaultStructureForObject())
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{
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m_values.resizeWithUninitializedValues(0, ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER);
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initPlainObject(state);
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}
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void Object::initPlainObject(ExecutionState& state)
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{
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m_prototype = state.context()->globalObject()->objectPrototype()->asObject();
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}
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Object* Object::createBuiltinObjectPrototype(ExecutionState& state)
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{
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Object* obj = new Object(state, ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER, false);
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obj->m_structure = state.context()->defaultStructureForObject();
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obj->m_prototype = nullptr;
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g_objectTag = *((size_t*)obj);
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return obj;
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}
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Object* Object::createFunctionPrototypeObject(ExecutionState& state, FunctionObject* function)
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{
|
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Object* obj = new Object(state, ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER + 1, false);
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obj->m_structure = state.context()->defaultStructureForFunctionPrototypeObject();
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obj->m_prototype = state.context()->globalObject()->objectPrototype()->asObject();
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obj->m_values[0] = Value(function);
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return obj;
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}
|
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|
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void Object::setPrototype(ExecutionState& state, const Value& value)
|
||
{
|
||
if (!isExtensible() && (value.isObject() || value.isUndefinedOrNull())) {
|
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ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "can't set prototype of this object");
|
||
}
|
||
|
||
Value it = value;
|
||
while (it.isObject()) {
|
||
if (it.isObject() && it.asObject() == this)
|
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ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "cyclic __proto__");
|
||
Value proto = it.asObject()->getPrototype(state);
|
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it = proto;
|
||
}
|
||
|
||
Object* o = nullptr;
|
||
if (value.isObject()) {
|
||
value.asObject()->markAsPrototypeObject(state);
|
||
o = value.asObject();
|
||
} else if (value.isNull()) {
|
||
o = nullptr;
|
||
} else if (value.isUndefined()) {
|
||
o = (Object*)1;
|
||
} else {
|
||
return;
|
||
}
|
||
if (rareData()) {
|
||
rareData()->m_prototype = o;
|
||
} else {
|
||
m_prototype = o;
|
||
}
|
||
}
|
||
|
||
void Object::markAsPrototypeObject(ExecutionState& state)
|
||
{
|
||
ensureObjectRareData();
|
||
rareData()->m_isEverSetAsPrototypeObject = true;
|
||
|
||
if (!state.context()->vmInstance()->didSomePrototypeObjectDefineIndexedProperty()) {
|
||
if (structure()->hasIndexPropertyName()) {
|
||
state.context()->vmInstance()->somePrototypeObjectDefineIndexedProperty(state);
|
||
}
|
||
}
|
||
}
|
||
|
||
// http://www.ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
|
||
ObjectGetResult Object::getOwnProperty(ExecutionState& state, const ObjectPropertyName& propertyName) ESCARGOT_OBJECT_SUBCLASS_MUST_REDEFINE
|
||
{
|
||
if (propertyName.isUIntType() && !m_structure->hasIndexPropertyName()) {
|
||
return ObjectGetResult();
|
||
}
|
||
|
||
PropertyName P = propertyName.toPropertyName(state);
|
||
size_t idx = m_structure->findProperty(state, P);
|
||
if (LIKELY(idx != SIZE_MAX)) {
|
||
const ObjectStructureItem& item = m_structure->readProperty(state, idx);
|
||
if (item.m_descriptor.isDataProperty()) {
|
||
if (LIKELY(!item.m_descriptor.isNativeAccessorProperty())) {
|
||
return ObjectGetResult(m_values[idx], item.m_descriptor.isWritable(), item.m_descriptor.isEnumerable(), item.m_descriptor.isConfigurable());
|
||
} else {
|
||
ObjectPropertyNativeGetterSetterData* data = item.m_descriptor.nativeGetterSetterData();
|
||
return ObjectGetResult(data->m_getter(state, this, m_values[idx]), item.m_descriptor.isWritable(), item.m_descriptor.isEnumerable(), item.m_descriptor.isConfigurable());
|
||
}
|
||
} else {
|
||
Value v = m_values[idx];
|
||
ASSERT(v.isPointerValue() && v.asPointerValue()->isJSGetterSetter());
|
||
return ObjectGetResult(v.asPointerValue()->asJSGetterSetter(), item.m_descriptor.isEnumerable(), item.m_descriptor.isConfigurable());
|
||
}
|
||
}
|
||
return ObjectGetResult();
|
||
}
|
||
|
||
bool Object::defineOwnProperty(ExecutionState& state, const ObjectPropertyName& P, const ObjectPropertyDescriptor& desc) ESCARGOT_OBJECT_SUBCLASS_MUST_REDEFINE
|
||
{
|
||
if (UNLIKELY(isEverSetAsPrototypeObject())) {
|
||
if (UNLIKELY(!state.context()->vmInstance()->didSomePrototypeObjectDefineIndexedProperty() && P.isIndexString())) {
|
||
state.context()->vmInstance()->somePrototypeObjectDefineIndexedProperty(state);
|
||
}
|
||
}
|
||
|
||
// TODO Return true, if every field in Desc is absent.
|
||
// TODO Return true, if every field in Desc also occurs in current and the value of every field in Desc is the same value as the corresponding field in current when compared using the SameValue algorithm (9.12).
|
||
|
||
PropertyName propertyName = P.toPropertyName(state);
|
||
size_t oldIdx = m_structure->findProperty(state, propertyName);
|
||
if (oldIdx == SIZE_MAX) {
|
||
// 3. If current is undefined and extensible is false, then Reject.
|
||
if (UNLIKELY(!isExtensible()))
|
||
return false;
|
||
|
||
auto structureBefore = m_structure;
|
||
m_structure = m_structure->addProperty(state, propertyName, desc.toObjectStructurePropertyDescriptor());
|
||
ASSERT(structureBefore != m_structure);
|
||
if (LIKELY(desc.isDataProperty())) {
|
||
if (LIKELY(desc.isValuePresent()))
|
||
m_values.pushBack(desc.value(), m_structure->propertyCount());
|
||
else
|
||
m_values.pushBack(Value(), m_structure->propertyCount());
|
||
} else {
|
||
m_values.pushBack(Value(new JSGetterSetter(desc.getterSetter())), m_structure->propertyCount());
|
||
}
|
||
|
||
// ASSERT(m_values.size() == m_structure->propertyCount());
|
||
return true;
|
||
} else {
|
||
size_t idx = oldIdx;
|
||
const ObjectStructureItem& item = m_structure->readProperty(state, idx);
|
||
|
||
// If the [[Configurable]] field of current is false then
|
||
if (!item.m_descriptor.isConfigurable()) {
|
||
// Reject, if the [[Configurable]] field of Desc is true.
|
||
if (desc.isConfigurable()) {
|
||
return false;
|
||
}
|
||
// Reject, if the [[Enumerable]] field of Desc is present and the [[Enumerable]] fields of current and Desc are the Boolean negation of each other.
|
||
if (desc.isEnumerablePresent() && desc.isEnumerable() != item.m_descriptor.isEnumerable()) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
bool shouldDelete = false;
|
||
Value v;
|
||
if (item.m_descriptor.isNativeAccessorProperty()) {
|
||
v = this->get(state, ObjectPropertyName(state, propertyName)).value(state, this);
|
||
} else {
|
||
v = m_values[idx];
|
||
}
|
||
ObjectPropertyDescriptor newDesc = ObjectPropertyDescriptor::fromObjectStructurePropertyDescriptor(item.m_descriptor, v);
|
||
|
||
// If IsGenericDescriptor(Desc) is true, then
|
||
if (desc.isGenericDescriptor()) {
|
||
// no further validation is required.
|
||
|
||
// if IsDataDescriptor(current) and IsDataDescriptor(Desc) have different results, then
|
||
} else if (item.m_descriptor.isDataProperty() != desc.isDataDescriptor()) {
|
||
// Reject, if the [[Configurable]] field of current is false.
|
||
if (!item.m_descriptor.isConfigurable()) {
|
||
return false;
|
||
}
|
||
|
||
auto current = item.m_descriptor;
|
||
shouldDelete = true;
|
||
|
||
int f = 0;
|
||
if (current.isConfigurable()) {
|
||
f = f | ObjectPropertyDescriptor::ConfigurablePresent;
|
||
} else {
|
||
f = f | ObjectPropertyDescriptor::NonConfigurablePresent;
|
||
}
|
||
|
||
if (current.isEnumerable()) {
|
||
f = f | ObjectPropertyDescriptor::EnumerablePresent;
|
||
} else {
|
||
f = f | ObjectPropertyDescriptor::NonEnumerablePresent;
|
||
}
|
||
|
||
// If IsDataDescriptor(current) is true, then
|
||
if (current.isDataProperty()) {
|
||
// Convert the property named P of object O from a data property to an accessor property.
|
||
// Preserve the existing values of the converted property’s [[Configurable]] and [[Enumerable]] attributes
|
||
// and set the rest of the property’s attributes to their default values.
|
||
newDesc = ObjectPropertyDescriptor(desc.getterSetter(), (ObjectPropertyDescriptor::PresentAttribute)f);
|
||
} else {
|
||
// Else,
|
||
// Convert the property named P of object O from a data property to an accessor property.
|
||
// Preserve the existing values of the converted property’s [[Configurable]] and [[Enumerable]] attributes
|
||
// and set the rest of the property’s attributes to their default values.
|
||
newDesc = ObjectPropertyDescriptor(desc.value(), (ObjectPropertyDescriptor::PresentAttribute)f);
|
||
}
|
||
}
|
||
// Else, if IsDataDescriptor(current) and IsDataDescriptor(Desc) are both true, then
|
||
else if (item.m_descriptor.isDataProperty() && desc.isDataDescriptor()) {
|
||
// If the [[Configurable]] field of current is false, then
|
||
if (!item.m_descriptor.isConfigurable()) {
|
||
// Reject, if the [[Writable]] field of current is false and the [[Writable]] field of Desc is true.
|
||
if (!item.m_descriptor.isWritable() && desc.isWritable()) {
|
||
return false;
|
||
}
|
||
// If the [[Writable]] field of current is false, then
|
||
if (!item.m_descriptor.isWritable()) {
|
||
// Reject, if the [[Value]] field of Desc is present and SameValue(Desc.[[Value]], current.[[Value]]) is false.
|
||
Value val = desc.isValuePresent() ? desc.value() : Value();
|
||
if (desc.isValuePresent()) {
|
||
if (!val.equalsToByTheSameValueAlgorithm(state, getOwnDataPropertyUtilForObject(state, idx, this))) {
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
// else, the [[Configurable]] field of current is true, so any change is acceptable.
|
||
} else {
|
||
// Else, IsAccessorDescriptor(current) and IsAccessorDescriptor(Desc) are both true so,
|
||
ASSERT(!item.m_descriptor.isDataProperty() && !desc.isDataDescriptor());
|
||
|
||
// If the [[Configurable]] field of current is false, then
|
||
if (!item.m_descriptor.isConfigurable()) {
|
||
JSGetterSetter* current = Value(m_values[idx]).asPointerValue()->asJSGetterSetter();
|
||
|
||
// Reject, if the [[Set]] field of Desc is present and SameValue(Desc.[[Set]], current.[[Set]]) is false.
|
||
if (desc.getterSetter().hasSetter()) {
|
||
Value currentSetter = current->hasSetter() ? current->setter() : Value();
|
||
if (desc.getterSetter().setter() != currentSetter) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// Reject, if the [[Get]] field of Desc is present and SameValue(Desc.[[Get]], current.[[Get]]) is false.
|
||
if (desc.getterSetter().hasGetter()) {
|
||
Value currentGetter = current->hasGetter() ? current->getter() : Value();
|
||
if (desc.getterSetter().getter() != currentGetter) {
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// For each attribute field of Desc that is present, set the correspondingly named attribute of the property named P of object O to the value of the field.
|
||
if (newDesc.isDataDescriptor()) {
|
||
if (desc.isValuePresent()) {
|
||
newDesc.setValue(desc.value());
|
||
} else if (!newDesc.isValuePresent()) {
|
||
newDesc.setValue(Value());
|
||
}
|
||
if (desc.isWritablePresent()) {
|
||
newDesc.setWritable(desc.isWritable());
|
||
}
|
||
} else {
|
||
if (desc.isAccessorDescriptor()) {
|
||
if (desc.hasJSGetter()) {
|
||
newDesc.m_getterSetter.m_getter = desc.getterSetter().getter();
|
||
}
|
||
if (desc.hasJSSetter()) {
|
||
newDesc.m_getterSetter.m_setter = desc.getterSetter().setter();
|
||
}
|
||
}
|
||
}
|
||
if (desc.isConfigurablePresent()) {
|
||
newDesc.setConfigurable(desc.isConfigurable());
|
||
}
|
||
if (desc.isEnumerablePresent()) {
|
||
newDesc.setEnumerable(desc.isEnumerable());
|
||
}
|
||
|
||
if (newDesc.isDataDescriptor()) {
|
||
if (newDesc.isWritablePresent()) {
|
||
if (newDesc.isWritable() != item.m_descriptor.isWritable()) {
|
||
shouldDelete = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!shouldDelete && newDesc.isEnumerablePresent()) {
|
||
if (newDesc.isEnumerable() != item.m_descriptor.isEnumerable()) {
|
||
shouldDelete = true;
|
||
}
|
||
}
|
||
|
||
if (!shouldDelete && newDesc.isConfigurablePresent()) {
|
||
if (newDesc.isConfigurable() != item.m_descriptor.isConfigurable()) {
|
||
shouldDelete = true;
|
||
}
|
||
}
|
||
|
||
if (!shouldDelete) {
|
||
if (newDesc.isDataDescriptor() && desc.isValuePresent()) {
|
||
return setOwnDataPropertyUtilForObjectInner(state, idx, item, newDesc.value());
|
||
} else if (!newDesc.isDataDescriptor()) {
|
||
m_values[idx] = Value(new JSGetterSetter(newDesc.getterSetter()));
|
||
}
|
||
} else {
|
||
auto structureBefore = m_structure;
|
||
if (!structure()->isStructureWithFastAccess())
|
||
m_structure = structure()->convertToWithFastAccess(state);
|
||
|
||
if (newDesc.isDataDescriptor() && m_structure->m_properties[idx].m_descriptor.isNativeAccessorProperty()) {
|
||
auto newNative = new ObjectPropertyNativeGetterSetterData(newDesc.isWritable(), newDesc.isEnumerable(), newDesc.isConfigurable(),
|
||
m_structure->m_properties[idx].m_descriptor.nativeGetterSetterData()->m_getter, m_structure->m_properties[idx].m_descriptor.nativeGetterSetterData()->m_setter);
|
||
m_structure->m_properties[idx].m_descriptor = ObjectStructurePropertyDescriptor::createDataButHasNativeGetterSetterDescriptor(newNative);
|
||
} else {
|
||
m_structure->m_properties[idx].m_descriptor = newDesc.toObjectStructurePropertyDescriptor();
|
||
}
|
||
|
||
m_structure = new ObjectStructureWithFastAccess(state, *((ObjectStructureWithFastAccess*)m_structure));
|
||
|
||
ASSERT(structureBefore != m_structure);
|
||
if (newDesc.isDataDescriptor()) {
|
||
return setOwnDataPropertyUtilForObjectInner(state, idx, m_structure->m_properties[idx], newDesc.value());
|
||
} else {
|
||
m_values[idx] = Value(new JSGetterSetter(newDesc.getterSetter()));
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
}
|
||
|
||
bool Object::deleteOwnProperty(ExecutionState& state, const ObjectPropertyName& P) ESCARGOT_OBJECT_SUBCLASS_MUST_REDEFINE
|
||
{
|
||
auto result = getOwnProperty(state, P);
|
||
if (result.hasValue() && result.isConfigurable()) {
|
||
deleteOwnProperty(state, m_structure->findProperty(state, P.toPropertyName(state)));
|
||
return true;
|
||
} else if (result.hasValue() && !result.isConfigurable()) {
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
void Object::enumeration(ExecutionState& state, bool (*callback)(ExecutionState& state, Object* self, const ObjectPropertyName&, const ObjectStructurePropertyDescriptor& desc, void* data), void* data, bool shouldSkipSymbolKey) ESCARGOT_OBJECT_SUBCLASS_MUST_REDEFINE
|
||
{
|
||
size_t cnt = m_structure->propertyCount();
|
||
for (size_t i = 0; i < cnt; i++) {
|
||
const ObjectStructureItem& item = m_structure->readProperty(state, i);
|
||
if (shouldSkipSymbolKey && item.m_propertyName.isSymbol()) {
|
||
continue;
|
||
}
|
||
if (!callback(state, this, ObjectPropertyName(state, item.m_propertyName), item.m_descriptor, data)) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
ValueVector Object::getOwnPropertyKeys(ExecutionState& state)
|
||
{
|
||
ValueVector result;
|
||
enumeration(state, [](ExecutionState& state, Object* self, const ObjectPropertyName& name, const ObjectStructurePropertyDescriptor& desc, void* data) -> bool {
|
||
ValueVector* result = (ValueVector*)data;
|
||
result->pushBack(name.toPlainValue(state));
|
||
return true;
|
||
},
|
||
&result, false);
|
||
return result;
|
||
}
|
||
|
||
ObjectGetResult Object::get(ExecutionState& state, const ObjectPropertyName& propertyName)
|
||
{
|
||
Object* target = this;
|
||
while (true) {
|
||
auto result = target->getOwnProperty(state, propertyName);
|
||
if (result.hasValue()) {
|
||
return result;
|
||
}
|
||
target = target->getPrototypeObject();
|
||
if (!target) {
|
||
return ObjectGetResult();
|
||
}
|
||
}
|
||
}
|
||
|
||
// http://www.ecma-international.org/ecma-262/6.0/#sec-ordinary-object-internal-methods-and-internal-slots-set-p-v-receiver
|
||
bool Object::set(ExecutionState& state, const ObjectPropertyName& propertyName, const Value& v, const Value& receiver)
|
||
{
|
||
auto desc = getOwnProperty(state, propertyName);
|
||
if (!desc.hasValue()) {
|
||
Value target = this->getPrototype(state);
|
||
while (target.isObject()) {
|
||
Object* O = target.asObject();
|
||
auto desc = O->getOwnProperty(state, propertyName);
|
||
if (desc.hasValue()) {
|
||
return O->set(state, propertyName, v, receiver);
|
||
}
|
||
target = O->getPrototype(state);
|
||
}
|
||
ObjectPropertyDescriptor desc(v, ObjectPropertyDescriptor::AllPresent);
|
||
return defineOwnProperty(state, propertyName, desc);
|
||
} else {
|
||
// If IsDataDescriptor(ownDesc) is true, then
|
||
if (desc.isDataProperty()) {
|
||
// If ownDesc.[[Writable]] is false, return false.
|
||
if (!desc.isWritable()) {
|
||
return false;
|
||
}
|
||
|
||
if (!receiver.isObject())
|
||
return false;
|
||
Object* receiverObj = receiver.toObject(state);
|
||
// Let existingDescriptor be Receiver.[[GetOwnProperty]](P).
|
||
auto receiverDesc = receiverObj->getOwnProperty(state, propertyName);
|
||
// If existingDescriptor is not undefined, then
|
||
if (receiverDesc.hasValue()) {
|
||
// If IsAccessorDescriptor(existingDescriptor) is true, return false.
|
||
if (!receiverDesc.isDataProperty()) {
|
||
return false;
|
||
}
|
||
// If existingDescriptor.[[Writable]] is false, return false
|
||
if (!receiverDesc.isWritable()) {
|
||
return false;
|
||
}
|
||
// Let valueDesc be the PropertyDescriptor{[[Value]]: V}.
|
||
ObjectPropertyDescriptor desc(v);
|
||
return receiverObj->defineOwnProperty(state, propertyName, desc);
|
||
} else {
|
||
// Else Receiver does not currently have a property P,
|
||
// Return CreateDataProperty(Receiver, P, V).
|
||
ObjectPropertyDescriptor newDesc(v, ObjectPropertyDescriptor::AllPresent);
|
||
return receiverObj->defineOwnProperty(state, propertyName, newDesc);
|
||
}
|
||
} else {
|
||
// Let setter be ownDesc.[[Set]].
|
||
Value setter = desc.jsGetterSetter()->hasSetter() ? desc.jsGetterSetter()->setter() : Value();
|
||
|
||
// If setter is undefined, return false.
|
||
if (setter.isUndefined()) {
|
||
return false;
|
||
}
|
||
|
||
// Let setterResult be Call(setter, Receiver, «V»).
|
||
Value argv[] = { v };
|
||
FunctionObject::call(state, setter, receiver, 1, argv);
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
|
||
void Object::setThrowsException(ExecutionState& state, const ObjectPropertyName& P, const Value& v, const Value& receiver)
|
||
{
|
||
if (UNLIKELY(!set(state, P, v, receiver))) {
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::Code::TypeError, P.toExceptionString(), false, String::emptyString, errorMessage_DefineProperty_NotWritable);
|
||
}
|
||
}
|
||
|
||
void Object::setThrowsExceptionWhenStrictMode(ExecutionState& state, const ObjectPropertyName& P, const Value& v, const Value& receiver)
|
||
{
|
||
if (UNLIKELY(!set(state, P, v, receiver)) && state.inStrictMode()) {
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::Code::TypeError, P.toExceptionString(), false, String::emptyString, errorMessage_DefineProperty_NotWritable);
|
||
}
|
||
}
|
||
|
||
void Object::throwCannotDefineError(ExecutionState& state, const PropertyName& P)
|
||
{
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::Code::TypeError, P.toExceptionString(), false, String::emptyString, errorMessage_DefineProperty_RedefineNotConfigurable);
|
||
}
|
||
|
||
void Object::throwCannotWriteError(ExecutionState& state, const PropertyName& P)
|
||
{
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::Code::TypeError, P.toExceptionString(), false, String::emptyString, errorMessage_DefineProperty_NotWritable);
|
||
}
|
||
|
||
void Object::throwCannotDeleteError(ExecutionState& state, const PropertyName& P)
|
||
{
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::Code::TypeError, P.toExceptionString(), false, String::emptyString, errorMessage_DefineProperty_NotConfigurable);
|
||
}
|
||
|
||
void Object::deleteOwnProperty(ExecutionState& state, size_t idx)
|
||
{
|
||
m_structure = m_structure->removeProperty(state, idx);
|
||
m_values.erase(idx, m_structure->propertyCount() + 1);
|
||
|
||
// ASSERT(m_values.size() == m_structure->propertyCount());
|
||
}
|
||
|
||
uint64_t Object::length(ExecutionState& state)
|
||
{
|
||
// ES6
|
||
// return get(state, state.context()->staticStrings().length).value(state, this).toLength(state);
|
||
// ES5
|
||
return get(state, state.context()->staticStrings().length).value(state, this).toUint32(state);
|
||
}
|
||
|
||
double Object::lengthES6(ExecutionState& state)
|
||
{
|
||
return get(state, state.context()->staticStrings().length).value(state, this).toLength(state);
|
||
}
|
||
|
||
|
||
bool Object::nextIndexForward(ExecutionState& state, Object* obj, const double cur, const double end, const bool skipUndefined, double& nextIndex)
|
||
{
|
||
Value ptr = obj;
|
||
double ret = end;
|
||
bool exists = false;
|
||
struct Data {
|
||
bool* exists;
|
||
const bool* skipUndefined;
|
||
const double* cur;
|
||
double* ret;
|
||
} data;
|
||
data.exists = &exists;
|
||
data.skipUndefined = &skipUndefined;
|
||
data.cur = &cur;
|
||
data.ret = &ret;
|
||
|
||
while (ptr.isObject()) {
|
||
ptr.asObject()->enumeration(state, [](ExecutionState& state, Object* self, const ObjectPropertyName& name, const ObjectStructurePropertyDescriptor& desc, void* data) {
|
||
uint64_t index;
|
||
Data* e = (Data*)data;
|
||
double* ret = e->ret;
|
||
Value key = name.toPlainValue(state);
|
||
if ((index = key.toArrayIndex(state)) != Value::InvalidArrayIndexValue) {
|
||
if (*e->skipUndefined && self->get(state, name).value(state, self).isUndefined()) {
|
||
return true;
|
||
}
|
||
if (index > *e->cur) {
|
||
if (*ret > index) {
|
||
*ret = std::min(static_cast<double>(index), *ret);
|
||
*e->exists = true;
|
||
}
|
||
}
|
||
}
|
||
return true;
|
||
},
|
||
&data);
|
||
ptr = ptr.asObject()->getPrototype(state);
|
||
}
|
||
nextIndex = ret;
|
||
return exists;
|
||
}
|
||
|
||
bool Object::nextIndexBackward(ExecutionState& state, Object* obj, const double cur, const double end, const bool skipUndefined, double& nextIndex)
|
||
{
|
||
Value ptr = obj;
|
||
double ret = end;
|
||
bool exists = false;
|
||
struct Data {
|
||
bool* exists;
|
||
const bool* skipUndefined;
|
||
const double* cur;
|
||
double* ret;
|
||
} data;
|
||
data.exists = &exists;
|
||
data.skipUndefined = &skipUndefined;
|
||
data.cur = &cur;
|
||
data.ret = &ret;
|
||
|
||
while (ptr.isObject()) {
|
||
ptr.asObject()->enumeration(state, [](ExecutionState& state, Object* self, const ObjectPropertyName& name, const ObjectStructurePropertyDescriptor& desc, void* data) {
|
||
uint64_t index;
|
||
Data* e = (Data*)data;
|
||
double* ret = e->ret;
|
||
Value key = name.toPlainValue(state);
|
||
if ((index = key.toArrayIndex(state)) != Value::InvalidArrayIndexValue) {
|
||
if (*e->skipUndefined && self->get(state, name).value(state, self).isUndefined()) {
|
||
return true;
|
||
}
|
||
if (index < *e->cur) {
|
||
*ret = std::max(static_cast<double>(index), *ret);
|
||
*e->exists = true;
|
||
}
|
||
}
|
||
return true;
|
||
},
|
||
&data);
|
||
ptr = ptr.asObject()->getPrototype(state);
|
||
}
|
||
nextIndex = ret;
|
||
return exists;
|
||
}
|
||
|
||
void Object::sort(ExecutionState& state, const std::function<bool(const Value& a, const Value& b)>& comp)
|
||
{
|
||
std::vector<Value, GCUtil::gc_malloc_ignore_off_page_allocator<Value>> selected;
|
||
|
||
uint32_t len = length(state);
|
||
uint32_t n = 0;
|
||
uint32_t k = 0;
|
||
|
||
while (k < len) {
|
||
Value idx = Value(k);
|
||
if (hasOwnProperty(state, ObjectPropertyName(state, idx))) {
|
||
selected.push_back(getOwnProperty(state, ObjectPropertyName(state, idx)).value(state, this));
|
||
n++;
|
||
k++;
|
||
} else {
|
||
double result;
|
||
nextIndexForward(state, this, k, len, false, result);
|
||
k = result;
|
||
}
|
||
}
|
||
|
||
|
||
if (selected.size()) {
|
||
TightVector<Value, GCUtil::gc_malloc_ignore_off_page_allocator<Value>> tempSpace;
|
||
tempSpace.resizeWithUninitializedValues(selected.size());
|
||
|
||
mergeSort(selected.data(), selected.size(), tempSpace.data(), [&](const Value& a, const Value& b, bool* lessOrEqualp) -> bool {
|
||
*lessOrEqualp = comp(a, b);
|
||
return true;
|
||
});
|
||
}
|
||
|
||
uint32_t i;
|
||
for (i = 0; i < n; i++) {
|
||
setThrowsException(state, ObjectPropertyName(state, Value(i)), selected[i], this);
|
||
}
|
||
|
||
while (i < len) {
|
||
Value idx = Value(i);
|
||
if (hasOwnProperty(state, ObjectPropertyName(state, idx))) {
|
||
deleteOwnProperty(state, ObjectPropertyName(state, Value(i)));
|
||
i++;
|
||
} else {
|
||
double result;
|
||
nextIndexForward(state, this, i, len, false, result);
|
||
i = result;
|
||
}
|
||
}
|
||
}
|
||
|
||
Value Object::getOwnPropertyUtilForObjectAccCase(ExecutionState& state, size_t idx, const Value& receiver)
|
||
{
|
||
Value v = m_values[idx];
|
||
auto gs = v.asPointerValue()->asJSGetterSetter();
|
||
#ifdef ESCARGOT_32
|
||
if (gs->getter().isFunction()) {
|
||
#else
|
||
if (gs->hasGetter() && gs->getter().isFunction()) {
|
||
#endif
|
||
return gs->getter().asFunction()->call(state, receiver, 0, nullptr);
|
||
}
|
||
return Value();
|
||
}
|
||
|
||
bool Object::setOwnPropertyUtilForObjectAccCase(ExecutionState& state, size_t idx, const Value& newValue, const Value& receiver)
|
||
{
|
||
Value v = m_values[idx];
|
||
auto gs = v.asPointerValue()->asJSGetterSetter();
|
||
#ifdef ESCARGOT_32
|
||
if (gs->setter().isFunction()) {
|
||
#else
|
||
if (gs->hasSetter() && gs->setter().isFunction()) {
|
||
#endif
|
||
Value arg = newValue;
|
||
gs->setter().asFunction()->call(state, receiver, 1, &arg);
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
bool Object::defineNativeDataAccessorProperty(ExecutionState& state, const ObjectPropertyName& P, ObjectPropertyNativeGetterSetterData* data, const Value& objectInternalData)
|
||
{
|
||
if (hasOwnProperty(state, P))
|
||
return false;
|
||
if (!isExtensible())
|
||
return false;
|
||
|
||
ASSERT(!hasOwnProperty(state, P));
|
||
ASSERT(isExtensible());
|
||
|
||
m_structure = m_structure->addProperty(state, P.toPropertyName(state), ObjectStructurePropertyDescriptor::createDataButHasNativeGetterSetterDescriptor(data));
|
||
m_values.pushBack(objectInternalData, m_structure->propertyCount());
|
||
|
||
return true;
|
||
}
|
||
|
||
ObjectGetResult Object::getIndexedProperty(ExecutionState& state, const Value& property)
|
||
{
|
||
return get(state, ObjectPropertyName(state, property));
|
||
}
|
||
|
||
bool Object::setIndexedProperty(ExecutionState& state, const Value& property, const Value& value)
|
||
{
|
||
return set(state, ObjectPropertyName(state, property), value, this);
|
||
}
|
||
|
||
IteratorObject* Object::values(ExecutionState& state)
|
||
{
|
||
return new ArrayIteratorObject(state, this, ArrayIteratorObject::TypeValue);
|
||
}
|
||
|
||
IteratorObject* Object::keys(ExecutionState& state)
|
||
{
|
||
return new ArrayIteratorObject(state, this, ArrayIteratorObject::TypeKey);
|
||
}
|
||
|
||
IteratorObject* Object::entries(ExecutionState& state)
|
||
{
|
||
return new ArrayIteratorObject(state, this, ArrayIteratorObject::TypeKeyValue);
|
||
}
|
||
|
||
Object* Object::iterator(ExecutionState& state)
|
||
{
|
||
Value v = get(state, ObjectPropertyName(state, state.context()->vmInstance()->globalSymbols().iterator)).value(state, this);
|
||
if (!v.isFunction()) {
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "object is not iterable");
|
||
}
|
||
v = v.asFunction()->call(state, this, 0, nullptr);
|
||
if (!v.isObject()) {
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "object is not iterable");
|
||
}
|
||
|
||
return v.asObject();
|
||
}
|
||
|
||
std::pair<Value, bool> Object::iteratorNext(ExecutionState& state)
|
||
{
|
||
Value mayBeFn = get(state, ObjectPropertyName(state.context()->staticStrings().next)).value(state, this);
|
||
Value returnValue = FunctionObject::call(state, mayBeFn, this, 0, nullptr);
|
||
if (!returnValue.isObject()) {
|
||
ErrorObject::throwBuiltinError(state, ErrorObject::TypeError, "iterator next function returns illegal value");
|
||
}
|
||
|
||
Value done = returnValue.asObject()->get(state, ObjectPropertyName(state.context()->staticStrings().done)).value(state, returnValue);
|
||
Value value = returnValue.asObject()->get(state, ObjectPropertyName(state.context()->staticStrings().value)).value(state, returnValue);
|
||
return std::make_pair(value, done.toBoolean(state));
|
||
}
|
||
}
|