// Copyright 2019 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_COMPILER_HEAP_REFS_H_ #define V8_COMPILER_HEAP_REFS_H_ #include "src/base/optional.h" #include "src/ic/call-optimization.h" #include "src/objects/elements-kind.h" #include "src/objects/feedback-vector.h" #include "src/objects/instance-type.h" namespace v8 { class CFunctionInfo; namespace internal { class BytecodeArray; class CallHandlerInfo; class FixedDoubleArray; class FunctionTemplateInfo; class HeapNumber; class InternalizedString; class JSBoundFunction; class JSDataView; class JSGlobalProxy; class JSRegExp; class JSTypedArray; class NativeContext; class ScriptContextTable; namespace compiler { // Whether we are loading a property or storing to a property. // For a store during literal creation, do not walk up the prototype chain. enum class AccessMode { kLoad, kStore, kStoreInLiteral, kHas }; enum class SerializationPolicy { kAssumeSerialized, kSerializeIfNeeded }; enum class OddballType : uint8_t { kNone, // Not an Oddball. kBoolean, // True or False. kUndefined, kNull, kHole, kUninitialized, kOther // Oddball, but none of the above. }; // This list is sorted such that subtypes appear before their supertypes. // DO NOT VIOLATE THIS PROPERTY! #define HEAP_BROKER_OBJECT_LIST(V) \ /* Subtypes of JSObject */ \ V(JSArray) \ V(JSBoundFunction) \ V(JSDataView) \ V(JSFunction) \ V(JSGlobalObject) \ V(JSGlobalProxy) \ V(JSRegExp) \ V(JSTypedArray) \ /* Subtypes of Context */ \ V(NativeContext) \ /* Subtypes of FixedArray */ \ V(Context) \ V(ScopeInfo) \ V(ScriptContextTable) \ /* Subtypes of FixedArrayBase */ \ V(BytecodeArray) \ V(FixedArray) \ V(FixedDoubleArray) \ /* Subtypes of Name */ \ V(InternalizedString) \ V(String) \ V(Symbol) \ /* Subtypes of JSReceiver */ \ V(JSObject) \ /* Subtypes of HeapObject */ \ V(AccessorInfo) \ V(AllocationSite) \ V(ArrayBoilerplateDescription) \ V(BigInt) \ V(CallHandlerInfo) \ V(Cell) \ V(Code) \ V(DescriptorArray) \ V(FeedbackCell) \ V(FeedbackVector) \ V(FixedArrayBase) \ V(FunctionTemplateInfo) \ V(HeapNumber) \ V(JSReceiver) \ V(Map) \ V(Name) \ V(ObjectBoilerplateDescription) \ V(PropertyCell) \ V(SharedFunctionInfo) \ V(SourceTextModule) \ V(TemplateObjectDescription) \ /* Subtypes of Object */ \ V(HeapObject) class CompilationDependencies; struct FeedbackSource; class JSHeapBroker; class ObjectData; class PerIsolateCompilerCache; class PropertyAccessInfo; #define FORWARD_DECL(Name) class Name##Ref; HEAP_BROKER_OBJECT_LIST(FORWARD_DECL) #undef FORWARD_DECL class V8_EXPORT_PRIVATE ObjectRef { public: ObjectRef(JSHeapBroker* broker, Handle<Object> object, bool check_type = true); ObjectRef(JSHeapBroker* broker, ObjectData* data, bool check_type = true) : data_(data), broker_(broker) { CHECK_NOT_NULL(data_); } Handle<Object> object() const; bool equals(const ObjectRef& other) const; bool IsSmi() const; int AsSmi() const; #define HEAP_IS_METHOD_DECL(Name) bool Is##Name() const; HEAP_BROKER_OBJECT_LIST(HEAP_IS_METHOD_DECL) #undef HEAP_IS_METHOD_DECL #define HEAP_AS_METHOD_DECL(Name) Name##Ref As##Name() const; HEAP_BROKER_OBJECT_LIST(HEAP_AS_METHOD_DECL) #undef HEAP_AS_METHOD_DECL bool IsNullOrUndefined() const; bool IsTheHole() const; bool BooleanValue() const; Maybe<double> OddballToNumber() const; // Return the element at key {index} if {index} is known to be an own data // property of the object that is non-writable and non-configurable. base::Optional<ObjectRef> GetOwnConstantElement( uint32_t index, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized) const; Isolate* isolate() const; struct Hash { size_t operator()(const ObjectRef& ref) const { return base::hash_combine(ref.object().address()); } }; struct Equal { bool operator()(const ObjectRef& lhs, const ObjectRef& rhs) const { return lhs.equals(rhs); } }; protected: JSHeapBroker* broker() const; ObjectData* data() const; ObjectData* data_; // Should be used only by object() getters. private: friend class FunctionTemplateInfoRef; friend class JSArrayData; friend class JSGlobalObjectData; friend class JSGlobalObjectRef; friend class JSHeapBroker; friend class JSObjectData; friend class StringData; friend std::ostream& operator<<(std::ostream& os, const ObjectRef& ref); JSHeapBroker* broker_; }; // Temporary class that carries information from a Map. We'd like to remove // this class and use MapRef instead, but we can't as long as we support the // kDisabled broker mode. That's because obtaining the MapRef via // HeapObjectRef::map() requires a HandleScope when the broker is disabled. // During OptimizeGraph we generally don't have a HandleScope, however. There // are two places where we therefore use GetHeapObjectType() instead. Both that // function and this class should eventually be removed. class HeapObjectType { public: enum Flag : uint8_t { kUndetectable = 1 << 0, kCallable = 1 << 1 }; using Flags = base::Flags<Flag>; HeapObjectType(InstanceType instance_type, Flags flags, OddballType oddball_type) : instance_type_(instance_type), oddball_type_(oddball_type), flags_(flags) { DCHECK_EQ(instance_type == ODDBALL_TYPE, oddball_type != OddballType::kNone); } OddballType oddball_type() const { return oddball_type_; } InstanceType instance_type() const { return instance_type_; } Flags flags() const { return flags_; } bool is_callable() const { return flags_ & kCallable; } bool is_undetectable() const { return flags_ & kUndetectable; } private: InstanceType const instance_type_; OddballType const oddball_type_; Flags const flags_; }; // Constructors are carefully defined such that we do a type check on // the outermost Ref class in the inheritance chain only. #define DEFINE_REF_CONSTRUCTOR(name, base) \ name##Ref(JSHeapBroker* broker, Handle<Object> object, \ bool check_type = true) \ : base(broker, object, false) { \ if (check_type) { \ CHECK(Is##name()); \ } \ } \ name##Ref(JSHeapBroker* broker, ObjectData* data, bool check_type = true) \ : base(broker, data, false) { \ if (check_type) { \ CHECK(Is##name()); \ } \ } class HeapObjectRef : public ObjectRef { public: DEFINE_REF_CONSTRUCTOR(HeapObject, ObjectRef) Handle<HeapObject> object() const; MapRef map() const; // See the comment on the HeapObjectType class. HeapObjectType GetHeapObjectType() const; }; class PropertyCellRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(PropertyCell, HeapObjectRef) Handle<PropertyCell> object() const; PropertyDetails property_details() const; void Serialize(); ObjectRef value() const; }; class JSReceiverRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSReceiver, HeapObjectRef) Handle<JSReceiver> object() const; }; class JSObjectRef : public JSReceiverRef { public: DEFINE_REF_CONSTRUCTOR(JSObject, JSReceiverRef) Handle<JSObject> object() const; uint64_t RawFastDoublePropertyAsBitsAt(FieldIndex index) const; double RawFastDoublePropertyAt(FieldIndex index) const; ObjectRef RawFastPropertyAt(FieldIndex index) const; // Return the value of the property identified by the field {index} // if {index} is known to be an own data property of the object. base::Optional<ObjectRef> GetOwnDataProperty( Representation field_representation, FieldIndex index, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized) const; FixedArrayBaseRef elements() const; void SerializeElements(); void EnsureElementsTenured(); ElementsKind GetElementsKind() const; void SerializeObjectCreateMap(); base::Optional<MapRef> GetObjectCreateMap() const; }; class JSDataViewRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSDataView, JSObjectRef) Handle<JSDataView> object() const; size_t byte_length() const; size_t byte_offset() const; }; class JSBoundFunctionRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSBoundFunction, JSObjectRef) Handle<JSBoundFunction> object() const; void Serialize(); bool serialized() const; // The following are available only after calling Serialize(). JSReceiverRef bound_target_function() const; ObjectRef bound_this() const; FixedArrayRef bound_arguments() const; }; class V8_EXPORT_PRIVATE JSFunctionRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSFunction, JSObjectRef) Handle<JSFunction> object() const; bool has_feedback_vector() const; bool has_initial_map() const; bool has_prototype() const; bool IsOptimized() const; bool PrototypeRequiresRuntimeLookup() const; void Serialize(); bool serialized() const; // The following are available only after calling Serialize(). ObjectRef prototype() const; MapRef initial_map() const; ContextRef context() const; NativeContextRef native_context() const; SharedFunctionInfoRef shared() const; FeedbackVectorRef feedback_vector() const; CodeRef code() const; int InitialMapInstanceSizeWithMinSlack() const; }; class JSRegExpRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSRegExp, JSObjectRef) Handle<JSRegExp> object() const; ObjectRef raw_properties_or_hash() const; ObjectRef data() const; ObjectRef source() const; ObjectRef flags() const; ObjectRef last_index() const; void SerializeAsRegExpBoilerplate(); }; class HeapNumberRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(HeapNumber, HeapObjectRef) Handle<HeapNumber> object() const; double value() const; }; class ContextRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(Context, HeapObjectRef) Handle<Context> object() const; // {previous} decrements {depth} by 1 for each previous link successfully // followed. If {depth} != 0 on function return, then it only got // partway to the desired depth. If {serialize} is true, then // {previous} will cache its findings. ContextRef previous(size_t* depth, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized) const; // Only returns a value if the index is valid for this ContextRef. base::Optional<ObjectRef> get( int index, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized) const; SourceTextModuleRef GetModule(SerializationPolicy policy) const; // We only serialize the ScopeInfo if certain Promise // builtins are called. void SerializeScopeInfo(); base::Optional<ScopeInfoRef> scope_info() const; }; #define BROKER_COMPULSORY_NATIVE_CONTEXT_FIELDS(V) \ V(JSFunction, array_function) \ V(JSFunction, boolean_function) \ V(JSFunction, bigint_function) \ V(JSFunction, number_function) \ V(JSFunction, object_function) \ V(JSFunction, promise_function) \ V(JSFunction, promise_then) \ V(JSFunction, regexp_function) \ V(JSFunction, string_function) \ V(JSFunction, symbol_function) \ V(JSGlobalObject, global_object) \ V(JSGlobalProxy, global_proxy_object) \ V(JSObject, promise_prototype) \ V(Map, block_context_map) \ V(Map, bound_function_with_constructor_map) \ V(Map, bound_function_without_constructor_map) \ V(Map, catch_context_map) \ V(Map, eval_context_map) \ V(Map, fast_aliased_arguments_map) \ V(Map, function_context_map) \ V(Map, initial_array_iterator_map) \ V(Map, initial_string_iterator_map) \ V(Map, iterator_result_map) \ V(Map, js_array_holey_double_elements_map) \ V(Map, js_array_holey_elements_map) \ V(Map, js_array_holey_smi_elements_map) \ V(Map, js_array_packed_double_elements_map) \ V(Map, js_array_packed_elements_map) \ V(Map, js_array_packed_smi_elements_map) \ V(Map, sloppy_arguments_map) \ V(Map, slow_object_with_null_prototype_map) \ V(Map, strict_arguments_map) \ V(Map, with_context_map) \ V(ScriptContextTable, script_context_table) // Those are set by Bootstrapper::ExportFromRuntime, which may not yet have // happened when Turbofan is invoked via --always-opt. #define BROKER_OPTIONAL_NATIVE_CONTEXT_FIELDS(V) \ V(Map, async_function_object_map) \ V(Map, map_key_iterator_map) \ V(Map, map_key_value_iterator_map) \ V(Map, map_value_iterator_map) \ V(JSFunction, regexp_exec_function) \ V(Map, set_key_value_iterator_map) \ V(Map, set_value_iterator_map) #define BROKER_NATIVE_CONTEXT_FIELDS(V) \ BROKER_COMPULSORY_NATIVE_CONTEXT_FIELDS(V) \ BROKER_OPTIONAL_NATIVE_CONTEXT_FIELDS(V) class NativeContextRef : public ContextRef { public: DEFINE_REF_CONSTRUCTOR(NativeContext, ContextRef) Handle<NativeContext> object() const; void Serialize(); #define DECL_ACCESSOR(type, name) type##Ref name() const; BROKER_NATIVE_CONTEXT_FIELDS(DECL_ACCESSOR) #undef DECL_ACCESSOR ScopeInfoRef scope_info() const; MapRef GetFunctionMapFromIndex(int index) const; MapRef GetInitialJSArrayMap(ElementsKind kind) const; base::Optional<JSFunctionRef> GetConstructorFunction(const MapRef& map) const; }; class NameRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(Name, HeapObjectRef) Handle<Name> object() const; bool IsUniqueName() const; }; class ScriptContextTableRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(ScriptContextTable, HeapObjectRef) Handle<ScriptContextTable> object() const; }; class DescriptorArrayRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(DescriptorArray, HeapObjectRef) Handle<DescriptorArray> object() const; }; class FeedbackCellRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(FeedbackCell, HeapObjectRef) Handle<FeedbackCell> object() const; base::Optional<SharedFunctionInfoRef> shared_function_info() const; HeapObjectRef value() const; }; class FeedbackVectorRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(FeedbackVector, HeapObjectRef) Handle<FeedbackVector> object() const; SharedFunctionInfoRef shared_function_info() const; double invocation_count() const; void Serialize(); bool serialized() const; FeedbackCellRef GetClosureFeedbackCell(int index) const; }; class CallHandlerInfoRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(CallHandlerInfo, HeapObjectRef) Handle<CallHandlerInfo> object() const; Address callback() const; void Serialize(); ObjectRef data() const; }; class AccessorInfoRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(AccessorInfo, HeapObjectRef) Handle<AccessorInfo> object() const; }; class AllocationSiteRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(AllocationSite, HeapObjectRef) Handle<AllocationSite> object() const; bool PointsToLiteral() const; AllocationType GetAllocationType() const; ObjectRef nested_site() const; // {IsFastLiteral} determines whether the given array or object literal // boilerplate satisfies all limits to be considered for fast deep-copying // and computes the total size of all objects that are part of the graph. // // If PointsToLiteral() is false, then IsFastLiteral() is also false. bool IsFastLiteral() const; void SerializeBoilerplate(); // We only serialize boilerplate if IsFastLiteral is true. base::Optional<JSObjectRef> boilerplate() const; ElementsKind GetElementsKind() const; bool CanInlineCall() const; }; class BigIntRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(BigInt, HeapObjectRef) Handle<BigInt> object() const; uint64_t AsUint64() const; }; class V8_EXPORT_PRIVATE MapRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(Map, HeapObjectRef) Handle<Map> object() const; int instance_size() const; InstanceType instance_type() const; int GetInObjectProperties() const; int GetInObjectPropertiesStartInWords() const; int NumberOfOwnDescriptors() const; int GetInObjectPropertyOffset(int index) const; int constructor_function_index() const; int NextFreePropertyIndex() const; int UnusedPropertyFields() const; ElementsKind elements_kind() const; bool is_stable() const; bool is_extensible() const; bool is_constructor() const; bool has_prototype_slot() const; bool is_access_check_needed() const; bool is_deprecated() const; bool CanBeDeprecated() const; bool CanTransition() const; bool IsInobjectSlackTrackingInProgress() const; bool is_dictionary_map() const; bool IsFixedCowArrayMap() const; bool IsPrimitiveMap() const; bool is_undetectable() const; bool is_callable() const; bool has_indexed_interceptor() const; bool is_migration_target() const; bool supports_fast_array_iteration() const; bool supports_fast_array_resize() const; bool is_abandoned_prototype_map() const; OddballType oddball_type() const; #define DEF_TESTER(Type, ...) bool Is##Type##Map() const; INSTANCE_TYPE_CHECKERS(DEF_TESTER) #undef DEF_TESTER void SerializeBackPointer(); HeapObjectRef GetBackPointer() const; void SerializePrototype(); bool serialized_prototype() const; HeapObjectRef prototype() const; void SerializeForElementLoad(); void SerializeForElementStore(); bool HasOnlyStablePrototypesWithFastElements( ZoneVector<MapRef>* prototype_maps); // Concerning the underlying instance_descriptors: void SerializeOwnDescriptors(); void SerializeOwnDescriptor(InternalIndex descriptor_index); bool serialized_own_descriptor(InternalIndex descriptor_index) const; MapRef FindFieldOwner(InternalIndex descriptor_index) const; PropertyDetails GetPropertyDetails(InternalIndex descriptor_index) const; NameRef GetPropertyKey(InternalIndex descriptor_index) const; FieldIndex GetFieldIndexFor(InternalIndex descriptor_index) const; ObjectRef GetFieldType(InternalIndex descriptor_index) const; bool IsUnboxedDoubleField(InternalIndex descriptor_index) const; base::Optional<ObjectRef> GetStrongValue( InternalIndex descriptor_number) const; void SerializeRootMap(); base::Optional<MapRef> FindRootMap() const; // Available after calling JSFunctionRef::Serialize on a function that has // this map as initial map. ObjectRef GetConstructor() const; base::Optional<MapRef> AsElementsKind(ElementsKind kind) const; }; struct HolderLookupResult { HolderLookupResult(CallOptimization::HolderLookup lookup_ = CallOptimization::kHolderNotFound, base::Optional<JSObjectRef> holder_ = base::nullopt) : lookup(lookup_), holder(holder_) {} CallOptimization::HolderLookup lookup; base::Optional<JSObjectRef> holder; }; class FunctionTemplateInfoRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(FunctionTemplateInfo, HeapObjectRef) Handle<FunctionTemplateInfo> object() const; bool is_signature_undefined() const; bool accept_any_receiver() const; // The following returns true if the CallHandlerInfo is present. bool has_call_code() const; void SerializeCallCode(); base::Optional<CallHandlerInfoRef> call_code() const; Address c_function() const; const CFunctionInfo* c_signature() const; HolderLookupResult LookupHolderOfExpectedType( MapRef receiver_map, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized); }; class FixedArrayBaseRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(FixedArrayBase, HeapObjectRef) Handle<FixedArrayBase> object() const; int length() const; }; class ArrayBoilerplateDescriptionRef : public HeapObjectRef { public: using HeapObjectRef::HeapObjectRef; Handle<ArrayBoilerplateDescription> object() const; int constants_elements_length() const; }; class ObjectBoilerplateDescriptionRef : public HeapObjectRef { public: using HeapObjectRef::HeapObjectRef; Handle<ObjectBoilerplateDescription> object() const; int size() const; }; class FixedArrayRef : public FixedArrayBaseRef { public: DEFINE_REF_CONSTRUCTOR(FixedArray, FixedArrayBaseRef) Handle<FixedArray> object() const; ObjectRef get(int i) const; }; class FixedDoubleArrayRef : public FixedArrayBaseRef { public: DEFINE_REF_CONSTRUCTOR(FixedDoubleArray, FixedArrayBaseRef) Handle<FixedDoubleArray> object() const; double get_scalar(int i) const; bool is_the_hole(int i) const; }; class BytecodeArrayRef : public FixedArrayBaseRef { public: DEFINE_REF_CONSTRUCTOR(BytecodeArray, FixedArrayBaseRef) Handle<BytecodeArray> object() const; int register_count() const; int parameter_count() const; interpreter::Register incoming_new_target_or_generator_register() const; // Bytecode access methods. uint8_t get(int index) const; Address GetFirstBytecodeAddress() const; // Source position table. const byte* source_positions_address() const; int source_positions_size() const; // Constant pool access. Handle<Object> GetConstantAtIndex(int index) const; bool IsConstantAtIndexSmi(int index) const; Smi GetConstantAtIndexAsSmi(int index) const; // Exception handler table. Address handler_table_address() const; int handler_table_size() const; void SerializeForCompilation(); }; class JSArrayRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSArray, JSObjectRef) Handle<JSArray> object() const; ObjectRef length() const; // Return the element at key {index} if the array has a copy-on-write elements // storage and {index} is known to be an own data property. base::Optional<ObjectRef> GetOwnCowElement( uint32_t index, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized) const; }; class ScopeInfoRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(ScopeInfo, HeapObjectRef) Handle<ScopeInfo> object() const; int ContextLength() const; bool HasOuterScopeInfo() const; int Flags() const; bool HasContextExtension() const; // Only serialized via SerializeScopeInfoChain. ScopeInfoRef OuterScopeInfo() const; void SerializeScopeInfoChain(); }; #define BROKER_SFI_FIELDS(V) \ V(int, internal_formal_parameter_count) \ V(bool, has_duplicate_parameters) \ V(int, function_map_index) \ V(FunctionKind, kind) \ V(LanguageMode, language_mode) \ V(bool, native) \ V(bool, HasBreakInfo) \ V(bool, HasBuiltinId) \ V(bool, construct_as_builtin) \ V(bool, HasBytecodeArray) \ V(bool, is_safe_to_skip_arguments_adaptor) \ V(SharedFunctionInfo::Inlineability, GetInlineability) \ V(int, StartPosition) \ V(bool, is_compiled) \ V(bool, IsUserJavaScript) class V8_EXPORT_PRIVATE SharedFunctionInfoRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(SharedFunctionInfo, HeapObjectRef) Handle<SharedFunctionInfo> object() const; int builtin_id() const; int context_header_size() const; BytecodeArrayRef GetBytecodeArray() const; #define DECL_ACCESSOR(type, name) type name() const; BROKER_SFI_FIELDS(DECL_ACCESSOR) #undef DECL_ACCESSOR bool IsInlineable() const { return GetInlineability() == SharedFunctionInfo::kIsInlineable; } // Template objects may not be created at compilation time. This method // wraps the retrieval of the template object and creates it if // necessary. JSArrayRef GetTemplateObject( TemplateObjectDescriptionRef description, FeedbackSource const& source, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized); void SerializeFunctionTemplateInfo(); base::Optional<FunctionTemplateInfoRef> function_template_info() const; void SerializeScopeInfoChain(); ScopeInfoRef scope_info() const; }; class StringRef : public NameRef { public: DEFINE_REF_CONSTRUCTOR(String, NameRef) Handle<String> object() const; int length() const; uint16_t GetFirstChar(); base::Optional<double> ToNumber(); bool IsSeqString() const; bool IsExternalString() const; }; class SymbolRef : public NameRef { public: DEFINE_REF_CONSTRUCTOR(Symbol, NameRef) Handle<Symbol> object() const; }; class JSTypedArrayRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSTypedArray, JSObjectRef) Handle<JSTypedArray> object() const; bool is_on_heap() const; size_t length() const; void* data_ptr() const; void Serialize(); bool serialized() const; HeapObjectRef buffer() const; }; class SourceTextModuleRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(SourceTextModule, HeapObjectRef) Handle<SourceTextModule> object() const; void Serialize(); base::Optional<CellRef> GetCell(int cell_index) const; ObjectRef import_meta() const; }; class TemplateObjectDescriptionRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(TemplateObjectDescription, HeapObjectRef) Handle<TemplateObjectDescription> object() const; }; class CellRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(Cell, HeapObjectRef) Handle<Cell> object() const; ObjectRef value() const; }; class JSGlobalObjectRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSGlobalObject, JSObjectRef) Handle<JSGlobalObject> object() const; bool IsDetached() const; // If {serialize} is false: // If the property is known to exist as a property cell (on the global // object), return that property cell. Otherwise (not known to exist as a // property cell or known not to exist as a property cell) return nothing. // If {serialize} is true: // Like above but potentially access the heap and serialize the necessary // information. base::Optional<PropertyCellRef> GetPropertyCell( NameRef const& name, SerializationPolicy policy = SerializationPolicy::kAssumeSerialized) const; }; class JSGlobalProxyRef : public JSObjectRef { public: DEFINE_REF_CONSTRUCTOR(JSGlobalProxy, JSObjectRef) Handle<JSGlobalProxy> object() const; }; class CodeRef : public HeapObjectRef { public: DEFINE_REF_CONSTRUCTOR(Code, HeapObjectRef) Handle<Code> object() const; unsigned inlined_bytecode_size() const; }; class InternalizedStringRef : public StringRef { public: DEFINE_REF_CONSTRUCTOR(InternalizedString, StringRef) Handle<InternalizedString> object() const; }; #undef DEFINE_REF_CONSTRUCTOR } // namespace compiler } // namespace internal } // namespace v8 #endif // V8_COMPILER_HEAP_REFS_H_