mirror of
https://gitee.com/openharmony/arkcompiler_ets_runtime
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108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright (c) 2023 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecmascript/vtable.h"
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#include "ecmascript/layout_info-inl.h"
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namespace panda::ecmascript {
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VTable::Tuple VTable::CreateTuple(const JSThread *thread, JSTaggedValue phc,
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const JSHandle<JSTaggedValue> &owner, uint32_t propIndex)
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{
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DISALLOW_GARBAGE_COLLECTION;
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JSHClass *phcPoint = JSHClass::Cast(phc.GetTaggedObject());
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LayoutInfo *layoutInfo = LayoutInfo::Cast(phcPoint->GetLayout().GetTaggedObject());
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JSHandle<JSTaggedValue> name(thread, layoutInfo->GetKey(propIndex));
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// get type
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JSTaggedValue typeVal;
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PropertyAttributes attr = layoutInfo->GetAttr(propIndex);
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if (attr.IsAccessor()) {
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typeVal = JSTaggedValue(VTable::TypeKind::ACCESSOR);
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} else {
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typeVal = JSTaggedValue(VTable::TypeKind::FUNCTION);
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}
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JSHandle<JSTaggedValue> type(thread, typeVal);
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// get offset
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uint32_t propsNumber = phcPoint->NumberOfProps();
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int entry = layoutInfo->FindElementWithCache(thread, phcPoint, name.GetTaggedValue(), propsNumber);
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ASSERT(entry != -1);
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uint32_t offsetInt = phcPoint->GetInlinedPropertiesOffset(static_cast<uint32_t>(entry));
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JSHandle<JSTaggedValue> offset(thread, JSTaggedValue(offsetInt));
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CVector<JSHandle<JSTaggedValue>> vec {name, type, owner, offset};
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return VTable::Tuple(vec);
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}
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VTable::Tuple VTable::GetTuple(const JSThread *thread, uint32_t tupleIdx) const
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{
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CVector<JSHandle<JSTaggedValue>> vec;
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for (uint32_t loc = 0; loc < ITEM_NUM; ++loc) {
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JSTaggedValue val = Get(tupleIdx * TUPLE_SIZE + loc);
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vec.emplace_back(JSHandle<JSTaggedValue>(thread, val));
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}
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return Tuple(vec);
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}
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void VTable::SetByIndex(const JSThread *thread, uint32_t idx, const VTable::Tuple &tuple)
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{
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uint32_t beginIdx = idx * TUPLE_SIZE;
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for (uint32_t i = 0; i < TUPLE_SIZE; ++i) {
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uint32_t currIdx = beginIdx + i;
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JSTaggedValue val = tuple.GetItem(TupleItem(i)).GetTaggedValue();
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Set(thread, currIdx, val);
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}
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}
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void VTable::Trim(const JSThread *thread, uint32_t newLength)
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{
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TaggedArray::Trim(thread, newLength * VTable::TUPLE_SIZE);
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}
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int VTable::GetTupleIndexByName(JSTaggedValue name) const
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{
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DISALLOW_GARBAGE_COLLECTION;
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uint32_t len = GetNumberOfTuples();
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if (len == 0) {
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return -1;
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}
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[[maybe_unused]] EcmaString *str = EcmaString::Cast(name.GetTaggedObject());
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ASSERT_PRINT(EcmaStringAccessor(str).IsInternString(), "The name of the property is not an intern string");
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for (uint32_t index = 0; index < len; ++index) {
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JSTaggedValue nameVal = GetTupleItem(index, VTable::TupleItem::NAME);
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if (nameVal == name) {
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return index;
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}
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}
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return -1;
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}
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bool VTable::Find(JSTaggedValue name) const
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{
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return GetTupleIndexByName(name) != -1;
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}
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JSHandle<VTable> VTable::Copy(const JSThread *thread, const JSHandle<VTable> &vtable)
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{
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uint32_t length = vtable->GetLength();
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ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
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JSHandle<TaggedArray> copyVtable = factory->CopyArray(JSHandle<TaggedArray>(vtable), length, length);
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return JSHandle<VTable>(copyVtable);
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}
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} // namespace panda::ecmascript
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