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https://gitee.com/openharmony/arkcompiler_ets_runtime
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dc780fbcc9
Issue:#I9AYVE Signed-off-by: yang-19970325 <yangyang585@huawei.com> Change-Id: Ia651ba10ecc0c2241ecd874e0348f1134967fc71
417 lines
13 KiB
C++
417 lines
13 KiB
C++
/*
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* Copyright (c) 2021 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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#ifndef ECMASCRIPT_PROPERTY_ATTRIBUTES_H
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#define ECMASCRIPT_PROPERTY_ATTRIBUTES_H
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#include "ecmascript/js_tagged_value.h"
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#include "libpandabase/utils/bit_field.h"
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namespace panda::ecmascript {
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class PropertyDescriptor;
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enum class Representation {
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NONE,
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INT,
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DOUBLE,
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TAGGED,
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};
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enum class TrackType : uint8_t {
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NONE = 0x0ULL,
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INT = 0x1ULL,
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DOUBLE = 0x1ULL << 1,
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NUMBER = INT | DOUBLE,
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TAGGED = 0x1ULL << 2
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};
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enum class SharedFieldType {
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NONE = 0,
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NUMBER = (1 << 0),
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STRING = (1 << 1),
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BOOLEAN = (1 << 2),
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SENDABLE = (1 << 3),
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BIG_INT = (1 << 4),
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GENERIC = (1 << 5),
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NULL_TYPE = (1 << 6),
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UNDEFINED = (1 << 7),
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};
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enum class PropertyBoxType {
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// Meaningful when a property cell does not contain the hole.
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UNDEFINED, // The PREMONOMORPHIC of property cells.
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CONSTANT, // Cell has been assigned only once.
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CONSTANTTYPE, // Cell has been assigned only one type.
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MUTABLE, // Cell will no longer be tracked as constant.
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// Meaningful when a property cell contains the hole.
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UNINITIALIZED = UNDEFINED, // Cell has never been initialized.
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INVALIDATED = CONSTANT, // Cell has been deleted, invalidated or never existed.
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};
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/**
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* [bitfield]
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* Common | WritableField (bit 1)
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* | EnumerableField (bit 2)
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* | ConfigurableField (bit 3)
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* | IsAccessorField (bit 4)
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* | IsInlinedPropsField(bit 5)
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* | RepresentationField(bit 6...7)
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* --------------------------------
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* Fast | OffsetField(bit 8...17)
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* | TrackTypeField(bit 18...20)
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* | SharedFieldTypeField(bit 21...28)
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* | SortedIndexField(bit 29...38)
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* | IsConstPropsField(bit 39)
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* | IsNotHoleField(bit 40)
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* -----------------------------
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* Slow | PropertyBoxTypeField(bit 8...9)
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* | DictionaryOrderField(bit 10...29)
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* | SharedFieldTypeField(bit 30...37)
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*/
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class PropertyAttributes {
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public:
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PropertyAttributes() = default;
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~PropertyAttributes() = default;
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DEFAULT_NOEXCEPT_MOVE_SEMANTIC(PropertyAttributes);
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DEFAULT_COPY_SEMANTIC(PropertyAttributes);
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explicit PropertyAttributes(uint64_t v) : value_(v) {}
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explicit PropertyAttributes(JSTaggedValue v) : value_(JSTaggedValue::UnwrapToUint64(v)) {}
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explicit PropertyAttributes(const PropertyDescriptor &desc);
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static constexpr uint32_t DICTIONARY_ORDER_NUM = 20;
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static constexpr uint32_t OFFSET_BITFIELD_NUM = 10;
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static constexpr uint32_t REPRESENTATION_NUM = 2;
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static constexpr uint32_t TRACK_TYPE_NUM = 3;
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static constexpr uint32_t FIELD_TYPE_NUM = 8;
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static constexpr uint32_t MAX_FAST_PROPS_CAPACITY = (1U << OFFSET_BITFIELD_NUM) - 1;
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static constexpr unsigned BITS_PER_BYTE = 8;
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static constexpr uint32_t MAX_BIT_SIZE = 48;
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static constexpr int INITIAL_PROPERTY_INDEX = 0;
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using PropertyMetaDataField = BitField<int32_t, 0, 4>; // 4: property metaData field occupies 4 bits
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using AttributesField = BitField<int32_t, 0, 4>; // 4: attributes field occupies 4 bits
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using DefaultAttributesField = BitField<int32_t, 0, 3>; // 3: default attributes field occupies 3 bits
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using WritableField = BitField<bool, 0, 1>; // 1: writable field occupies 1 bits
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using EnumerableField = WritableField::NextFlag;
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using ConfigurableField = EnumerableField::NextFlag;
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using IsAccessorField = ConfigurableField::NextFlag; // 4
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using IsInlinedPropsField = PropertyMetaDataField::NextFlag; // 5
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using RepresentationField = IsInlinedPropsField::NextField<Representation, REPRESENTATION_NUM>; // 2: 2 bits, 6-7
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using CommonLastBitField = RepresentationField;
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// For flags required for both fast mode and slow mode, need to be added before CommonLastBitField
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// ---------------------------------------------------------------------------------------------
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// only for fast mode
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using FastModeStartField = CommonLastBitField;
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static_assert(FastModeStartField::START_BIT == CommonLastBitField::START_BIT);
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static_assert(FastModeStartField::SIZE == CommonLastBitField::SIZE);
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using OffsetField = FastModeStartField::NextField<uint32_t, OFFSET_BITFIELD_NUM>; // 17
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using TrackTypeField = OffsetField::NextField<TrackType, TRACK_TYPE_NUM>; // 20: 3 bits
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// normal attr should include SharedFieldTypeField when set to layout
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static constexpr uint32_t NORMAL_ATTR_BITS = 28;
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using NormalAttrField = BitField<uint32_t, 0, NORMAL_ATTR_BITS>;
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using SharedFieldTypeField = TrackTypeField::NextField<SharedFieldType, FIELD_TYPE_NUM>; // 28: 8 bits
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using SortedIndexField = SharedFieldTypeField::NextField<uint32_t, OFFSET_BITFIELD_NUM>; // 38: 10 bits
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using IsConstPropsField = SortedIndexField::NextFlag; // 39
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using IsNotHoleField = IsConstPropsField::NextFlag; // 40
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using FastModeLastField = IsNotHoleField;
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static_assert(
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FastModeLastField::START_BIT + FastModeLastField::SIZE <= MAX_BIT_SIZE, "Invalid");
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// ---------------------------------------------------------------------------------------------
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// only for dictionary mode, include global
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using DictModeStartField = CommonLastBitField;
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static_assert(DictModeStartField::START_BIT == CommonLastBitField::START_BIT);
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static_assert(DictModeStartField::SIZE == CommonLastBitField::SIZE);
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using PropertyBoxTypeField = DictModeStartField::NextField<PropertyBoxType, 2>; // 2: 2 bits, 8-9
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using DictionaryOrderField = PropertyBoxTypeField::NextField<uint32_t, DICTIONARY_ORDER_NUM>; // 29
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using DictSharedFieldTypeField = DictionaryOrderField::NextField<SharedFieldType, FIELD_TYPE_NUM>;
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using DictModeLastField = DictSharedFieldTypeField;
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static_assert(
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DictModeLastField::START_BIT + DictModeLastField::SIZE <= MAX_BIT_SIZE, "Invalid");
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inline int32_t GetPropertyMetaData() const
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{
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return PropertyMetaDataField::Get(value_);
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}
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static PropertyAttributes Default()
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{
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return PropertyAttributes(GetDefaultAttributes());
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}
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static PropertyAttributes Default(bool w, bool e, bool c, bool isAccessor = false)
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{
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uint64_t value = WritableField::Encode(w) | EnumerableField::Encode(e) | ConfigurableField::Encode(c) |
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IsAccessorField::Encode(isAccessor);
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return PropertyAttributes(value);
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}
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static PropertyAttributes DefaultAccessor(bool w, bool e, bool c)
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{
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uint64_t value = WritableField::Encode(w) | EnumerableField::Encode(e) | ConfigurableField::Encode(c) |
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IsAccessorField::Encode(true);
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return PropertyAttributes(value);
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}
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inline void SetDefaultAttributes()
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{
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AttributesField::Set<uint64_t>(DefaultAttributesField::Mask(), &value_);
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}
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static inline int32_t GetDefaultAttributes()
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{
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return DefaultAttributesField::Mask();
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}
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// JSShared should not update tracktype.
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bool UpdateTrackType(JSTaggedValue value)
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{
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TrackType oldType = GetTrackType();
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if (oldType == TrackType::TAGGED) {
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return false;
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}
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TrackType newType = TrackType::TAGGED;
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if (value.IsInt()) {
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newType = static_cast<TrackType>(static_cast<uint8_t>(TrackType::INT) | static_cast<uint8_t>(oldType));
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} else if (value.IsDouble()) {
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newType = static_cast<TrackType>(static_cast<uint8_t>(TrackType::DOUBLE) | static_cast<uint8_t>(oldType));
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}
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if (oldType != newType) {
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SetTrackType(newType);
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return true;
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}
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return false;
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}
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inline bool IsDefaultAttributes() const
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{
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return AttributesField::Get(value_) == static_cast<int32_t>(DefaultAttributesField::Mask());
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}
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inline void SetNoneAttributes()
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{
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AttributesField::Set<uint64_t>(0U, &value_);
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}
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inline bool IsNoneAttributes() const
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{
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return AttributesField::Get(value_) == 0;
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}
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inline void SetWritable(bool flag)
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{
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WritableField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsWritable() const
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{
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return WritableField::Get(value_);
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}
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inline void SetEnumerable(bool flag)
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{
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EnumerableField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsEnumerable() const
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{
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return EnumerableField::Get(value_);
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}
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inline void SetConfigurable(bool flag)
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{
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ConfigurableField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsConfigurable() const
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{
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return ConfigurableField::Get(value_);
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}
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inline void SetIsAccessor(bool flag)
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{
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IsAccessorField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsAccessor() const
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{
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return IsAccessorField::Get(value_);
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}
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inline void SetIsInlinedProps(bool flag)
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{
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IsInlinedPropsField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsInlinedProps() const
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{
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return IsInlinedPropsField::Get(value_);
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}
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inline void SetIsConstProps(bool flag)
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{
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IsConstPropsField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsConstProps() const
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{
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return IsConstPropsField::Get(value_);
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}
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inline void SetIsNotHole(bool flag)
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{
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IsNotHoleField::Set<uint64_t>(flag, &value_);
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}
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inline bool IsNotHole() const
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{
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return IsNotHoleField::Get(value_);
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}
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inline bool IsTaggedRep() const
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{
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return !IsDoubleRep() && !IsIntRep();
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}
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inline bool IsDoubleRep() const
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{
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auto rep = GetRepresentation();
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return rep == Representation::DOUBLE;
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}
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inline bool IsIntRep() const
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{
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auto rep = GetRepresentation();
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return rep == Representation::INT;
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}
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inline void SetRepresentation(Representation representation)
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{
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RepresentationField::Set<uint64_t>(representation, &value_);
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}
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inline Representation GetRepresentation() const
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{
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return RepresentationField::Get(value_);
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}
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inline TrackType GetTrackType() const
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{
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return TrackTypeField::Get(value_);
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}
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inline void SetTrackType(TrackType type)
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{
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TrackTypeField::Set<uint64_t>(type, &value_);
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}
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inline SharedFieldType GetSharedFieldType() const
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{
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return SharedFieldTypeField::Get(value_);
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}
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inline void SetSharedFieldType(SharedFieldType fieldType)
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{
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SharedFieldTypeField::Set<uint64_t>(fieldType, &value_);
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}
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inline void SetDictSharedFieldType(SharedFieldType fieldType)
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{
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DictSharedFieldTypeField::Set<uint64_t>(fieldType, &value_);
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}
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inline SharedFieldType GetDictSharedFieldType() const
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{
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return DictSharedFieldTypeField::Get(value_);
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}
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inline void SetDictionaryOrder(uint32_t order)
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{
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DictionaryOrderField::Set<uint64_t>(order, &value_);
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}
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inline uint32_t GetDictionaryOrder() const
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{
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return DictionaryOrderField::Get(value_);
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}
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inline void SetOffset(uint32_t offset)
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{
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OffsetField::Set<uint64_t>(offset, &value_);
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}
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inline uint32_t GetOffset() const
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{
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return OffsetField::Get(value_);
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}
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inline void SetSortedIndex(uint32_t sortedIndex)
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{
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SortedIndexField::Set<uint64_t>(sortedIndex, &value_);
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}
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inline uint32_t GetSortedIndex() const
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{
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return SortedIndexField::Get(value_);
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}
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inline void SetNormalAttr(uint32_t normalAttr)
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{
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NormalAttrField::Set<uint64_t>(normalAttr, &value_);
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}
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inline uint32_t GetNormalAttr() const
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{
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return NormalAttrField::Get(value_);
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}
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inline JSTaggedValue GetNormalTagged() const
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{
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return JSTaggedValue::WrapUint64(GetNormalAttr());
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}
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inline uint64_t GetValue() const
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{
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return value_;
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}
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inline void SetBoxType(PropertyBoxType cellType)
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{
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PropertyBoxTypeField::Set<uint64_t>(cellType, &value_);
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}
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inline PropertyBoxType GetBoxType() const
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{
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return PropertyBoxTypeField::Get(value_);
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}
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inline static bool IsValidIndex(int index)
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{
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return DictionaryOrderField::IsValid(index);
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}
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inline JSTaggedValue GetTaggedValue() const
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{
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return JSTaggedValue::WrapUint64(value_);
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}
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private:
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uint64_t value_{0};
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};
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} // namespace panda::ecmascript
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#endif // ECMASCRIPT_PROPERTY_ATTRIBUTES_H
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