#include <objects.h>

Inheritance diagram for v8::internal::TypeFeedbackInfo:

Collaboration diagram for v8::internal::TypeFeedbackInfo:

Classes
class	ICsWithTypeInfoCountField

class	ICTotalCountField

class	InlinedTypeChangeChecksum

class	OwnTypeChangeChecksum

Public Member Functions
int	ic_total_count ()

void	set_ic_total_count (int count)

int	ic_with_type_info_count ()

void	change_ic_with_type_info_count (int delta)

int	ic_generic_count ()

void	change_ic_generic_count (int delta)

void	initialize_storage ()

void	change_own_type_change_checksum ()

int	own_type_change_checksum ()

void	set_inlined_type_change_checksum (int checksum)

bool	matches_inlined_type_change_checksum (int checksum)

Public Member Functions inherited from v8::internal::Struct
void	InitializeBody (int object_size)

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

void	set_map (Map *value)

void	set_map_no_write_barrier (Map *value)

Map *	synchronized_map ()

MapWord	synchronized_map_word () const

void	synchronized_set_map (Map *value)

void	synchronized_set_map_no_write_barrier (Map *value)

void	synchronized_set_map_word (MapWord map_word)

MapWord	map_word () const

void	set_map_word (MapWord map_word)

Heap *	GetHeap () const

Isolate *	GetIsolate () const

Address	address ()

void	Iterate (ObjectVisitor *v)

void	IterateBody (InstanceType type, int object_size, ObjectVisitor *v)

int	Size ()

bool	MayContainRawValues ()

int	SizeFromMap (Map *map)

WriteBarrierMode	GetWriteBarrierMode (const DisallowHeapAllocation &promise)

void	HeapObjectShortPrint (OStream &os)

	STATIC_ASSERT (kMapOffset==Internals::kHeapObjectMapOffset)

Public Member Functions inherited from v8::internal::Object
bool	IsObject () const

	INLINE (bool IsFixedArrayBase() const)

	INLINE (bool IsExternal() const)

	INLINE (bool IsAccessorInfo() const)

	INLINE (bool IsStruct() const)

	INLINE (bool IsSpecObject()) const

	INLINE (bool IsSpecFunction()) const

	INLINE (bool IsTemplateInfo()) const

	INLINE (bool IsNameDictionary() const)

	INLINE (bool IsSeededNumberDictionary() const)

	INLINE (bool IsUnseededNumberDictionary() const)

	INLINE (bool IsOrderedHashSet() const)

	INLINE (bool IsOrderedHashMap() const)

bool	IsCallable () const

	INLINE (bool IsUndefined() const)

	INLINE (bool IsNull() const)

	INLINE (bool IsTheHole() const)

	INLINE (bool IsException() const)

	INLINE (bool IsUninitialized() const)

	INLINE (bool IsTrue() const)

	INLINE (bool IsFalse() const)

	INLINE (bool IsArgumentsMarker() const)

	INLINE (bool IsFiller() const)

double	Number ()

	INLINE (bool IsNaN() const)

	INLINE (bool IsMinusZero() const)

bool	ToInt32 (int32_t *value)

bool	ToUint32 (uint32_t *value)

Representation	OptimalRepresentation ()

bool	FitsRepresentation (Representation representation)

Handle< HeapType >	OptimalType (Isolate *isolate, Representation representation)

bool	HasValidElements ()

bool	HasSpecificClassOf (String *name)

bool	BooleanValue ()

Object *	GetHash ()

bool	SameValue (Object *other)

bool	SameValueZero (Object *other)

bool	ToArrayIndex (uint32_t *index)

bool	IsStringObjectWithCharacterAt (uint32_t index)

void	VerifyApiCallResultType ()

void	ShortPrint (FILE *out=stdout)

void	ShortPrint (StringStream *accumulator)

Static Public Attributes
static const int	kStorage1Offset = HeapObject::kHeaderSize

static const int	kStorage2Offset = kStorage1Offset + kPointerSize

static const int	kStorage3Offset = kStorage2Offset + kPointerSize

static const int	kSize = kStorage3Offset + kPointerSize

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

static const int	kHeaderSize = kMapOffset + kPointerSize

Static Public Attributes inherited from v8::internal::Object
static const int	kHeaderSize = 0

Private Member Functions
	DISALLOW_IMPLICIT_CONSTRUCTORS (TypeFeedbackInfo)

Static Private Attributes
static const int	kTypeChangeChecksumBits = 7

Additional Inherited Members
Public Types inherited from v8::internal::Object
enum	StoreFromKeyed { MAY_BE_STORE_FROM_KEYED , CERTAINLY_NOT_STORE_FROM_KEYED }

enum	StorePropertyMode { NORMAL_PROPERTY , SUPER_PROPERTY }

Static Public Member Functions inherited from v8::internal::HeapObject
static HeapObject *	FromAddress (Address address)

static Object **	RawField (HeapObject *obj, int offset)

static void	UpdateMapCodeCache (Handle< HeapObject > object, Handle< Name > name, Handle< Code > code)

Static Public Member Functions inherited from v8::internal::Object
static Handle< Object >	NewStorageFor (Isolate *isolate, Handle< Object > object, Representation representation)

static Handle< Object >	WrapForRead (Isolate *isolate, Handle< Object > object, Representation representation)

static MaybeHandle< JSReceiver >	ToObject (Isolate *isolate, Handle< Object > object)

static MaybeHandle< JSReceiver >	ToObject (Isolate *isolate, Handle< Object > object, Handle< Context > context)

static MUST_USE_RESULT MaybeHandle< Smi >	ToSmi (Isolate *isolate, Handle< Object > object)

static MUST_USE_RESULT MaybeHandle< Object >	GetProperty (LookupIterator *it)

static MUST_USE_RESULT MaybeHandle< Object >	SetProperty (Handle< Object > object, Handle< Name > key, Handle< Object > value, StrictMode strict_mode, StoreFromKeyed store_mode=MAY_BE_STORE_FROM_KEYED)

static MUST_USE_RESULT MaybeHandle< Object >	SetProperty (LookupIterator *it, Handle< Object > value, StrictMode strict_mode, StoreFromKeyed store_mode, StorePropertyMode data_store_mode=NORMAL_PROPERTY)

static MUST_USE_RESULT MaybeHandle< Object >	WriteToReadOnlyProperty (LookupIterator *it, Handle< Object > value, StrictMode strict_mode)

static Handle< Object >	SetDataProperty (LookupIterator *it, Handle< Object > value)

static MUST_USE_RESULT MaybeHandle< Object >	AddDataProperty (LookupIterator *it, Handle< Object > value, PropertyAttributes attributes, StrictMode strict_mode, StoreFromKeyed store_mode)

static MUST_USE_RESULT MaybeHandle< Object >	GetPropertyOrElement (Handle< Object > object, Handle< Name > key)

static MUST_USE_RESULT MaybeHandle< Object >	GetProperty (Isolate isolate, Handle< Object > object, const char key)

static MUST_USE_RESULT MaybeHandle< Object >	GetProperty (Handle< Object > object, Handle< Name > key)

static MUST_USE_RESULT MaybeHandle< Object >	GetPropertyWithAccessor (Handle< Object > receiver, Handle< Name > name, Handle< JSObject > holder, Handle< Object > structure)

static MUST_USE_RESULT MaybeHandle< Object >	SetPropertyWithAccessor (Handle< Object > receiver, Handle< Name > name, Handle< Object > value, Handle< JSObject > holder, Handle< Object > structure, StrictMode strict_mode)

static MUST_USE_RESULT MaybeHandle< Object >	GetPropertyWithDefinedGetter (Handle< Object > receiver, Handle< JSReceiver > getter)

static MUST_USE_RESULT MaybeHandle< Object >	SetPropertyWithDefinedSetter (Handle< Object > receiver, Handle< JSReceiver > setter, Handle< Object > value)

static MUST_USE_RESULT MaybeHandle< Object >	GetElement (Isolate *isolate, Handle< Object > object, uint32_t index)

static MUST_USE_RESULT MaybeHandle< Object >	GetElementWithReceiver (Isolate *isolate, Handle< Object > object, Handle< Object > receiver, uint32_t index)

static Handle< Smi >	GetOrCreateHash (Isolate *isolate, Handle< Object > object)

Protected Member Functions inherited from v8::internal::HeapObject
void	IteratePointers (ObjectVisitor *v, int start, int end)

void	IteratePointer (ObjectVisitor *v, int offset)

void	IterateNextCodeLink (ObjectVisitor *v, int offset)

Detailed Description

Definition at line 8034 of file objects.h.

Member Function Documentation

◆ change_ic_generic_count()

void v8::internal::TypeFeedbackInfo::change_ic_generic_count ( int delta )

inline

Definition at line 7044 of file objects-inl.h.

                                                         {
   if (delta == 0) return;
   int new_count = ic_generic_count() + delta;
   if (new_count >= 0) {
     new_count &= ~Smi::kMinValue;
     WRITE_FIELD(this, kStorage3Offset, Smi::FromInt(new_count));
   }
 }

References v8::internal::Smi::FromInt(), ic_generic_count(), kStorage3Offset, and WRITE_FIELD.

Referenced by v8::internal::IC::OnTypeFeedbackChanged().

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◆ change_ic_with_type_info_count()

void v8::internal::TypeFeedbackInfo::change_ic_with_type_info_count ( int delta )

inline

Definition at line 7022 of file objects-inl.h.

                                                                {
   if (delta == 0) return;
   int value = Smi::cast(READ_FIELD(this, kStorage2Offset))->value();
   int new_count = ICsWithTypeInfoCountField::decode(value) + delta;
   // We can get negative count here when the type-feedback info is
   // shared between two code objects. The can only happen when
   // the debugger made a shallow copy of code object (see Heap::CopyCode).
   // Since we do not optimize when the debugger is active, we can skip
   // this counter update.
   if (new_count >= 0) {
     new_count &= ICsWithTypeInfoCountField::kMask;
     value = ICsWithTypeInfoCountField::update(value, new_count);
     WRITE_FIELD(this, kStorage2Offset, Smi::FromInt(value));
   }
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), v8::internal::Smi::FromInt(), v8::internal::BitFieldBase< T, shift, size, U >::kMask, kStorage2Offset, READ_FIELD, v8::internal::BitFieldBase< T, shift, size, U >::update(), and WRITE_FIELD.

Referenced by v8::internal::IC::OnTypeFeedbackChanged().

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◆ change_own_type_change_checksum()

void v8::internal::TypeFeedbackInfo::change_own_type_change_checksum ( )

inline

Definition at line 7061 of file objects-inl.h.

                                                        {
   int value = Smi::cast(READ_FIELD(this, kStorage1Offset))->value();
   int checksum = OwnTypeChangeChecksum::decode(value);
   checksum = (checksum + 1) % (1 << kTypeChangeChecksumBits);
   value = OwnTypeChangeChecksum::update(value, checksum);
   // Ensure packed bit field is in Smi range.
   if (value > Smi::kMaxValue) value |= Smi::kMinValue;
   if (value < Smi::kMinValue) value &= ~Smi::kMinValue;
   WRITE_FIELD(this, kStorage1Offset, Smi::FromInt(value));
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), v8::internal::Smi::FromInt(), v8::internal::Smi::kMaxValue, v8::internal::Smi::kMinValue, kStorage1Offset, kTypeChangeChecksumBits, READ_FIELD, v8::internal::BitFieldBase< T, shift, size, U >::update(), and WRITE_FIELD.

Referenced by v8::internal::IC::OnTypeFeedbackChanged().

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◆ DISALLOW_IMPLICIT_CONSTRUCTORS()

v8::internal::TypeFeedbackInfo::DISALLOW_IMPLICIT_CONSTRUCTORS ( TypeFeedbackInfo )

private

◆ ic_generic_count()

int v8::internal::TypeFeedbackInfo::ic_generic_count ( )

inline

Definition at line 7039 of file objects-inl.h.

                                        {
   return Smi::cast(READ_FIELD(this, kStorage3Offset))->value();
 }

References kStorage3Offset, and READ_FIELD.

Referenced by change_ic_generic_count(), and v8::internal::GetICCounts().

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◆ ic_total_count()

int v8::internal::TypeFeedbackInfo::ic_total_count ( )

inline

Definition at line 7002 of file objects-inl.h.

                                      {
   int current = Smi::cast(READ_FIELD(this, kStorage1Offset))->value();
   return ICTotalCountField::decode(current);
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), kStorage1Offset, and READ_FIELD.

Referenced by v8::internal::GetICCounts().

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◆ ic_with_type_info_count()

int v8::internal::TypeFeedbackInfo::ic_with_type_info_count ( )

inline

Definition at line 7016 of file objects-inl.h.

                                               {
   int current = Smi::cast(READ_FIELD(this, kStorage2Offset))->value();
   return ICsWithTypeInfoCountField::decode(current);
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), kStorage2Offset, and READ_FIELD.

Referenced by v8::internal::GetICCounts().

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◆ initialize_storage()

void v8::internal::TypeFeedbackInfo::initialize_storage ( )

inline

Definition at line 7054 of file objects-inl.h.

                                           {
   WRITE_FIELD(this, kStorage1Offset, Smi::FromInt(0));
   WRITE_FIELD(this, kStorage2Offset, Smi::FromInt(0));
   WRITE_FIELD(this, kStorage3Offset, Smi::FromInt(0));
 }

References v8::internal::Smi::FromInt(), kStorage1Offset, kStorage2Offset, kStorage3Offset, and WRITE_FIELD.

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◆ matches_inlined_type_change_checksum()

bool v8::internal::TypeFeedbackInfo::matches_inlined_type_change_checksum ( int checksum )

inline

Definition at line 7090 of file objects-inl.h.

                                                                         {
   int value = Smi::cast(READ_FIELD(this, kStorage2Offset))->value();
   int mask = (1 << kTypeChangeChecksumBits) - 1;
   return InlinedTypeChangeChecksum::decode(value) == (checksum & mask);
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), kStorage2Offset, kTypeChangeChecksumBits, and READ_FIELD.

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◆ own_type_change_checksum()

int v8::internal::TypeFeedbackInfo::own_type_change_checksum ( )

inline

Definition at line 7084 of file objects-inl.h.

                                                {
   int value = Smi::cast(READ_FIELD(this, kStorage1Offset))->value();
   return OwnTypeChangeChecksum::decode(value);
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), kStorage1Offset, and READ_FIELD.

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◆ set_ic_total_count()

void v8::internal::TypeFeedbackInfo::set_ic_total_count ( int count )

inline

Definition at line 7008 of file objects-inl.h.

                                                    {
   int value = Smi::cast(READ_FIELD(this, kStorage1Offset))->value();
   value = ICTotalCountField::update(value,
                                     ICTotalCountField::decode(count));
   WRITE_FIELD(this, kStorage1Offset, Smi::FromInt(value));
 }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), v8::internal::Smi::FromInt(), kStorage1Offset, READ_FIELD, v8::internal::BitFieldBase< T, shift, size, U >::update(), and WRITE_FIELD.

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◆ set_inlined_type_change_checksum()

void v8::internal::TypeFeedbackInfo::set_inlined_type_change_checksum ( int checksum )

inline

Definition at line 7073 of file objects-inl.h.

                                                                     {
   int value = Smi::cast(READ_FIELD(this, kStorage2Offset))->value();
   int mask = (1 << kTypeChangeChecksumBits) - 1;
   value = InlinedTypeChangeChecksum::update(value, checksum & mask);
   // Ensure packed bit field is in Smi range.
   if (value > Smi::kMaxValue) value |= Smi::kMinValue;
   if (value < Smi::kMinValue) value &= ~Smi::kMinValue;
   WRITE_FIELD(this, kStorage2Offset, Smi::FromInt(value));
 }

References v8::internal::Smi::FromInt(), v8::internal::Smi::kMaxValue, v8::internal::Smi::kMinValue, kStorage2Offset, kTypeChangeChecksumBits, READ_FIELD, v8::internal::BitFieldBase< T, shift, size, U >::update(), and WRITE_FIELD.

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Member Data Documentation

◆ kSize

const int v8::internal::TypeFeedbackInfo::kSize = kStorage3Offset + kPointerSize

static

Definition at line 8063 of file objects.h.

◆ kStorage1Offset

const int v8::internal::TypeFeedbackInfo::kStorage1Offset = HeapObject::kHeaderSize

static

Definition at line 8060 of file objects.h.

Referenced by change_own_type_change_checksum(), ic_total_count(), initialize_storage(), own_type_change_checksum(), and set_ic_total_count().

◆ kStorage2Offset

const int v8::internal::TypeFeedbackInfo::kStorage2Offset = kStorage1Offset + kPointerSize

static

Definition at line 8061 of file objects.h.

Referenced by change_ic_with_type_info_count(), ic_with_type_info_count(), initialize_storage(), matches_inlined_type_change_checksum(), and set_inlined_type_change_checksum().

◆ kStorage3Offset

const int v8::internal::TypeFeedbackInfo::kStorage3Offset = kStorage2Offset + kPointerSize

static

Definition at line 8062 of file objects.h.

Referenced by change_ic_generic_count(), ic_generic_count(), and initialize_storage().

◆ kTypeChangeChecksumBits

const int v8::internal::TypeFeedbackInfo::kTypeChangeChecksumBits = 7

staticprivate

Definition at line 8066 of file objects.h.

Referenced by change_own_type_change_checksum(), matches_inlined_type_change_checksum(), and set_inlined_type_change_checksum().

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

/mnt/V8SourceCode/src/objects.h
/mnt/V8SourceCode/src/objects-inl.h

Classes

Public Member Functions

Static Public Attributes

Private Member Functions

Static Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ change_ic_generic_count()

◆ change_ic_with_type_info_count()

◆ change_own_type_change_checksum()

◆ DISALLOW_IMPLICIT_CONSTRUCTORS()

◆ ic_generic_count()

◆ ic_total_count()

◆ ic_with_type_info_count()

◆ initialize_storage()

◆ matches_inlined_type_change_checksum()

◆ own_type_change_checksum()

◆ set_ic_total_count()

◆ set_inlined_type_change_checksum()

Member Data Documentation

◆ kSize

◆ kStorage1Offset

◆ kStorage2Offset

◆ kStorage3Offset

◆ kTypeChangeChecksumBits