| // 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" |
| #include "src/utils/boxed-float.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. |
| // This list must not contain a type if it doesn't contain all of its subtypes |
| // too. For example, it CANNOT contain FixedArrayBase if it doesn't contain |
| // FixedDoubleArray, BytecodeArray and FixedArray. |
| // DO NOT VIOLATE THESE TWO PROPERTIES! |
| // Classes on this list will skip serialization when |
| // FLAG_turbo_direct_heap_access is on. Otherwise, they might get serialized. |
| #define HEAP_BROKER_NEVER_SERIALIZED_OBJECT_LIST(V) \ |
| /* Subtypes of FixedArray */ \ |
| V(ObjectBoilerplateDescription) \ |
| V(ScopeInfo) \ |
| /* Subtypes of Name */ \ |
| V(Symbol) \ |
| /* Subtypes of HeapObject */ \ |
| V(AccessorInfo) \ |
| V(ArrayBoilerplateDescription) \ |
| V(CallHandlerInfo) \ |
| V(Cell) \ |
| V(TemplateObjectDescription) |
| |
| // This list is sorted such that subtypes appear before their supertypes. |
| // DO NOT VIOLATE THIS PROPERTY! |
| #define HEAP_BROKER_SERIALIZED_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(ScriptContextTable) \ |
| /* Subtypes of FixedArrayBase */ \ |
| V(BytecodeArray) \ |
| V(FixedArray) \ |
| V(FixedDoubleArray) \ |
| /* Subtypes of Name */ \ |
| V(InternalizedString) \ |
| V(String) \ |
| /* Subtypes of JSReceiver */ \ |
| V(JSObject) \ |
| /* Subtypes of HeapObject */ \ |
| V(AllocationSite) \ |
| V(BigInt) \ |
| V(Code) \ |
| V(DescriptorArray) \ |
| V(FeedbackCell) \ |
| V(FeedbackVector) \ |
| V(FixedArrayBase) \ |
| V(FunctionTemplateInfo) \ |
| V(HeapNumber) \ |
| V(JSReceiver) \ |
| V(Map) \ |
| V(Name) \ |
| V(PropertyCell) \ |
| V(SharedFunctionInfo) \ |
| V(SourceTextModule) \ |
| /* 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_SERIALIZED_OBJECT_LIST(FORWARD_DECL) |
| HEAP_BROKER_NEVER_SERIALIZED_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_SERIALIZED_OBJECT_LIST(HEAP_IS_METHOD_DECL) |
| HEAP_BROKER_NEVER_SERIALIZED_OBJECT_LIST(HEAP_IS_METHOD_DECL) |
| #undef HEAP_IS_METHOD_DECL |
| |
| #define HEAP_AS_METHOD_DECL(Name) Name##Ref As##Name() const; |
| HEAP_BROKER_SERIALIZED_OBJECT_LIST(HEAP_AS_METHOD_DECL) |
| HEAP_BROKER_NEVER_SERIALIZED_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; |
| }; |
| |
| class JSBoundFunctionRef : public JSObjectRef { |
| public: |
| DEFINE_REF_CONSTRUCTOR(JSBoundFunction, JSObjectRef) |
| |
| Handle<JSBoundFunction> object() const; |
| |
| bool 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 HasAttachedOptimizedCode() 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; |
| FeedbackCellRef raw_feedback_cell() 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; |
| |
| Float64 get(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; |
| |
| Handle<ByteArray> SourcePositionTable() 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; |
| bool HasContextExtensionSlot() 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(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; |
| SharedFunctionInfo::Inlineability GetInlineability() 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; |
| }; |
| |
| 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_ |
