Inheritance diagram for v8::internal::Map:

Classes
class	BodyDescriptor

class	FieldCounts

Public Member Functions
int	GetInObjectPropertiesStartInWords () const

void	SetInObjectPropertiesStartInWords (int value)

int	GetInObjectProperties () const

int	GetConstructorFunctionIndex () const

void	SetConstructorFunctionIndex (int value)

InterceptorInfo *	GetNamedInterceptor ()

InterceptorInfo *	GetIndexedInterceptor ()

int	UsedInstanceSize () const

int	UnusedPropertyFields () const

int	UnusedInObjectProperties () const

void	SetInObjectUnusedPropertyFields (int unused_property_fields)

void	SetOutOfObjectUnusedPropertyFields (int unused_property_fields)

void	CopyUnusedPropertyFields (Map map)

void	CopyUnusedPropertyFieldsAdjustedForInstanceSize (Map map)

void	AccountAddedPropertyField ()

void	AccountAddedOutOfObjectPropertyField (int unused_in_property_array)

	STATIC_ASSERT (NumberOfOwnDescriptorsBits::kMax >=kMaxNumberOfDescriptors)

	STATIC_ASSERT (kSlackTrackingCounterStart<=ConstructionCounterBits::kMax)

void	StartInobjectSlackTracking ()

bool	IsInobjectSlackTrackingInProgress () const

void	InobjectSlackTrackingStep (Isolate *isolate)

int	ComputeMinObjectSlack (Isolate *isolate)

int	InstanceSizeFromSlack (int slack) const

void	CompleteInobjectSlackTracking (Isolate *isolate)

bool	is_abandoned_prototype_map () const

bool	has_fast_smi_elements () const

bool	has_fast_object_elements () const

bool	has_fast_smi_or_object_elements () const

bool	has_fast_double_elements () const

bool	has_fast_elements () const

bool	has_sloppy_arguments_elements () const

bool	has_fast_sloppy_arguments_elements () const

bool	has_fast_string_wrapper_elements () const

bool	has_fixed_typed_array_elements () const

bool	has_dictionary_elements () const

bool	DictionaryElementsInPrototypeChainOnly (Isolate *isolate)

Map	ElementsTransitionMap ()

FixedArrayBase	GetInitialElements () const

bool	should_be_fast_prototype_map () const

Map	GetPrototypeChainRootMap (Isolate *isolate) const

Map	FindRootMap (Isolate *isolate) const

Map	FindFieldOwner (Isolate *isolate, int descriptor) const

int	GetInObjectPropertyOffset (int index) const

FieldCounts	GetFieldCounts () const

int	NumberOfFields () const

bool	HasOutOfObjectProperties () const

bool	TransitionRequiresSynchronizationWithGC (Map target) const

bool	TransitionRemovesTaggedField (Map target) const

bool	TransitionChangesTaggedFieldToUntaggedField (Map target) const

bool	InstancesNeedRewriting (Map target) const

bool	InstancesNeedRewriting (Map target, int target_number_of_fields, int target_inobject, int target_unused, int *old_number_of_fields) const

Object *	GetConstructor () const

FunctionTemplateInfo *	GetFunctionTemplateInfo () const

void	SetConstructor (Object *constructor, WriteBarrierMode mode=UPDATE_WRITE_BARRIER)

Object *	GetBackPointer () const

void	SetBackPointer (Object *value, WriteBarrierMode mode=UPDATE_WRITE_BARRIER)

LayoutDescriptor	layout_descriptor_gc_safe () const

bool	HasFastPointerLayout () const

LayoutDescriptor	GetLayoutDescriptor () const

void	UpdateDescriptors (DescriptorArray *descriptors, LayoutDescriptor layout_descriptor)

void	InitializeDescriptors (DescriptorArray *descriptors, LayoutDescriptor layout_descriptor)

bool	IsPrototypeValidityCellValid () const

PropertyDetails	GetLastDescriptorDetails () const

int	LastAdded () const

int	NumberOfOwnDescriptors () const

void	SetNumberOfOwnDescriptors (int number)

Cell *	RetrieveDescriptorsPointer ()

bool	OnlyHasSimpleProperties () const

int	EnumLength () const

void	SetEnumLength (int length)

void	mark_unstable ()

bool	is_stable () const

bool	CanBeDeprecated () const

bool	TooManyFastProperties (StoreOrigin store_origin) const

void	AppendDescriptor (Descriptor *desc)

int	NextFreePropertyIndex () const

int	NumberOfEnumerableProperties () const

int	Hash ()

Map	FindElementsKindTransitionedMap (Isolate *isolate, MapHandles const &candidates)

bool	CanTransition () const

bool	IsBooleanMap () const

bool	IsNullOrUndefinedMap () const

bool	IsPrimitiveMap () const

bool	IsSpecialReceiverMap () const

bool	IsCustomElementsReceiverMap () const

bool	IsMapInArrayPrototypeChain (Isolate *isolate) const

	STATIC_ASSERT (kInstanceTypeOffset==Internals::kMapInstanceTypeOffset)

bool	EquivalentToForNormalization (const Map other, PropertyNormalizationMode mode) const

bool	IsUnboxedDoubleField (FieldIndex index) const

void	PrintMapDetails (std::ostream &os)

void	NotifyLeafMapLayoutChange (Isolate *isolate)

bool	CanHaveFastTransitionableElementsKind () const

Public Member Functions inherited from v8::internal::HeapObjectPtr
Map	map () const

void	set_map (Map value)

void	set_map_after_allocation (Map value, WriteBarrierMode mode=UPDATE_WRITE_BARRIER)

void	set_map_no_write_barrier (Map value)

ObjectSlot	map_slot ()

MapWord	map_word () const

void	set_map_word (MapWord map_word)

void	synchronized_set_map (Map value)

void	synchronized_set_map_word (MapWord map_word)

WriteBarrierMode	GetWriteBarrierMode (const DisallowHeapAllocation &promise)

	operator HeapObject * ()

	operator const HeapObject * () const

bool	is_null () const

bool	IsHeapObjectPtr () const

ReadOnlyRoots	GetReadOnlyRoots () const

Address	address () const

int	Size () const

int	SizeFromMap (Map map) const

ObjectSlot	RawField (int byte_offset) const

MaybeObjectSlot	RawMaybeWeakField (int byte_offset) const

void	HeapObjectVerify (Isolate *isolate)

Address	GetFieldAddress (int field_offset) const

Public Member Functions inherited from v8::internal::ObjectPtr
constexpr	ObjectPtr (Address ptr)

	operator Object * () const

bool	operator== (const ObjectPtr other) const

bool	operator!= (const ObjectPtr other) const

bool	operator< (const ObjectPtr other) const

constexpr Address	ptr () const

ObjectPtr *	operator-> ()

const ObjectPtr *	operator-> () const

bool	IsHashTableBase () const

V8_INLINE bool	IsSmallOrderedHashTable () const

bool	IsObject () const

double	Number () const

bool	ToInt32 (int32_t *value) const

bool	ToUint32 (uint32_t *value) const

bool	BooleanValue (Isolate *isolate)

bool	FilterKey (PropertyFilter filter)

Object *	GetHash ()

Smi	GetOrCreateHash (Isolate *isolate)

V8_EXPORT_PRIVATE bool	SameValue (Object *other)

V8_WARN_UNUSED_RESULT bool	ToArrayIndex (uint32_t *index) const

void	ShortPrint (FILE *out=stdout)

void	ShortPrint (std::ostream &os)

void	Print ()

void	Print (std::ostream &os)

Static Public Member Functions
static MaybeHandle< JSFunction >	GetConstructorFunction (Handle< Map > map, Handle< Context > native_context)

static Handle< PrototypeInfo >	GetOrCreatePrototypeInfo (Handle< JSObject > prototype, Isolate *isolate)

static Handle< PrototypeInfo >	GetOrCreatePrototypeInfo (Handle< Map > prototype_map, Isolate *isolate)

static void	SetShouldBeFastPrototypeMap (Handle< Map > map, bool value, Isolate *isolate)

static Handle< Object >	GetOrCreatePrototypeChainValidityCell (Handle< Map > map, Isolate *isolate)

static bool	IsPrototypeChainInvalidated (Map map)

static V8_WARN_UNUSED_RESULT Handle< FieldType >	GeneralizeFieldType (Representation rep1, Handle< FieldType > type1, Representation rep2, Handle< FieldType > type2, Isolate *isolate)

static void	GeneralizeField (Isolate *isolate, Handle< Map > map, int modify_index, PropertyConstness new_constness, Representation new_representation, Handle< FieldType > new_field_type)

static bool	IsInplaceGeneralizableField (PropertyConstness constness, Representation representation, FieldType field_type)

static void	GeneralizeIfCanHaveTransitionableFastElementsKind (Isolate isolate, InstanceType instance_type, PropertyConstness constness, Representation representation, Handle< FieldType > field_type)

static Handle< Map >	ReconfigureProperty (Isolate *isolate, Handle< Map > map, int modify_index, PropertyKind new_kind, PropertyAttributes new_attributes, Representation new_representation, Handle< FieldType > new_field_type)

static Handle< Map >	ReconfigureElementsKind (Isolate *isolate, Handle< Map > map, ElementsKind new_elements_kind)

static Handle< Map >	PrepareForDataProperty (Isolate *isolate, Handle< Map > old_map, int descriptor_number, PropertyConstness constness, Handle< Object > value)

static Handle< Map >	Normalize (Isolate isolate, Handle< Map > map, PropertyNormalizationMode mode, const char reason)

static void	SetPrototype (Isolate *isolate, Handle< Map > map, Handle< Object > prototype, bool enable_prototype_setup_mode=true)

static MaybeHandle< Map >	TryUpdate (Isolate *isolate, Handle< Map > map) V8_WARN_UNUSED_RESULT

static Map	TryUpdateSlow (Isolate *isolate, Map map) V8_WARN_UNUSED_RESULT

static Handle< Map >	Update (Isolate *isolate, Handle< Map > map)

static Handle< Map >	CopyInitialMap (Isolate *isolate, Handle< Map > map)

static Handle< Map >	CopyInitialMap (Isolate *isolate, Handle< Map > map, int instance_size, int in_object_properties, int unused_property_fields)

static Handle< Map >	CopyInitialMapNormalized (Isolate *isolate, Handle< Map > map, PropertyNormalizationMode mode=CLEAR_INOBJECT_PROPERTIES)

static Handle< Map >	CopyDropDescriptors (Isolate *isolate, Handle< Map > map)

static Handle< Map >	CopyInsertDescriptor (Isolate isolate, Handle< Map > map, Descriptor descriptor, TransitionFlag flag)

static MaybeObjectHandle	WrapFieldType (Isolate *isolate, Handle< FieldType > type)

static FieldType	UnwrapFieldType (MaybeObject wrapped_type)

static V8_WARN_UNUSED_RESULT MaybeHandle< Map >	CopyWithField (Isolate *isolate, Handle< Map > map, Handle< Name > name, Handle< FieldType > type, PropertyAttributes attributes, PropertyConstness constness, Representation representation, TransitionFlag flag)

static V8_WARN_UNUSED_RESULT MaybeHandle< Map >	CopyWithConstant (Isolate *isolate, Handle< Map > map, Handle< Name > name, Handle< Object > constant, PropertyAttributes attributes, TransitionFlag flag)

static Handle< Map >	TransitionElementsTo (Isolate *isolate, Handle< Map > map, ElementsKind to_kind)

static Handle< Map >	AsElementsKind (Isolate *isolate, Handle< Map > map, ElementsKind kind)

static Handle< Map >	CopyAsElementsKind (Isolate *isolate, Handle< Map > map, ElementsKind kind, TransitionFlag flag)

static Handle< Map >	AsLanguageMode (Isolate *isolate, Handle< Map > initial_map, Handle< SharedFunctionInfo > shared_info)

static Handle< Map >	CopyForPreventExtensions (Isolate isolate, Handle< Map > map, PropertyAttributes attrs_to_add, Handle< Symbol > transition_marker, const char reason)

static Handle< Map >	FixProxy (Handle< Map > map, InstanceType type, int size)

static Handle< Map >	TransitionToDataProperty (Isolate *isolate, Handle< Map > map, Handle< Name > name, Handle< Object > value, PropertyAttributes attributes, PropertyConstness constness, StoreOrigin store_origin)

static Handle< Map >	TransitionToAccessorProperty (Isolate *isolate, Handle< Map > map, Handle< Name > name, int descriptor, Handle< Object > getter, Handle< Object > setter, PropertyAttributes attributes)

static Handle< Map >	ReconfigureExistingProperty (Isolate *isolate, Handle< Map > map, int descriptor, PropertyKind kind, PropertyAttributes attributes)

static Handle< Map >	CopyForElementsTransition (Isolate *isolate, Handle< Map > map)

static Handle< Map >	Copy (Isolate isolate, Handle< Map > map, const char reason)

static Handle< Map >	Create (Isolate *isolate, int inobject_properties)

static int	SlackForArraySize (int old_size, int size_limit)

static void	EnsureDescriptorSlack (Isolate *isolate, Handle< Map > map, int slack)

static Handle< Map >	GetObjectCreateMap (Isolate *isolate, Handle< HeapObject > prototype)

static MaybeHandle< Map >	TryGetObjectCreateMap (Isolate *isolate, Handle< HeapObject > prototype)

static Handle< Map >	TransitionToPrototype (Isolate *isolate, Handle< Map > map, Handle< Object > prototype)

static Handle< Map >	TransitionToImmutableProto (Isolate *isolate, Handle< Map > map)

static Handle< Map >	AddMissingTransitionsForTesting (Isolate *isolate, Handle< Map > split_map, Handle< DescriptorArray > descriptors, Handle< LayoutDescriptor > full_layout_descriptor)

static VisitorId	GetVisitorId (Map map)

static bool	CanHaveFastTransitionableElementsKind (InstanceType instance_type)

Static Public Attributes
static const int	kNoConstructorFunctionIndex = 0

static const int	kSlackTrackingCounterStart = 7

static const int	kSlackTrackingCounterEnd = 1

static const int	kNoSlackTracking = 0

static const int	kGenerousAllocationCount

static const int	kPrototypeChainValid = 0

static const int	kPrototypeChainInvalid = 1

static const int	kMaxPreAllocatedPropertyFields = 255

Static Public Attributes inherited from v8::internal::HeapObjectPtr
static const int	kMapOffset = HeapObject::kMapOffset

static const int	kHeaderSize = HeapObject::kHeaderSize

Friends
class	MapUpdater

Additional Inherited Members
Protected Types inherited from v8::internal::HeapObjectPtr
enum	AllowInlineSmiStorage { kRequireHeapObjectTag, kAllowBeingASmi }

Protected Member Functions inherited from v8::internal::HeapObjectPtr
	HeapObjectPtr (Address ptr, AllowInlineSmiStorage allow_smi)

Detailed Description

Definition at line 178 of file map.h.

Member Data Documentation

◆ kGenerousAllocationCount

const int v8::internal::Map::kGenerousAllocationCount

static

Initial value:

=

kSlackTrackingCounterStart - kSlackTrackingCounterEnd + 1

Definition at line 327 of file map.h.

The documentation for this class was generated from the following files:

v8/src/objects/map.h
v8/src/objects/map-inl.h
v8/src/objects-inl.h
v8/src/objects-printer.cc
v8/src/objects.cc

Classes

Public Member Functions

Static Public Member Functions

Static Public Attributes

Friends

Additional Inherited Members

Detailed Description

Member Data Documentation

◆ kGenerousAllocationCount