blob: f0e9d638856adcd7c01784b8a647f67faca9f686 [file] [log] [blame]
// Copyright 2014 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_FACTORY_H_
#define V8_FACTORY_H_
#include "src/feedback-vector.h"
#include "src/globals.h"
#include "src/ic/handler-configuration.h"
#include "src/isolate.h"
#include "src/messages.h"
#include "src/objects/data-handler.h"
#include "src/objects/descriptor-array.h"
#include "src/objects/dictionary.h"
#include "src/objects/js-array.h"
#include "src/objects/js-regexp.h"
#include "src/objects/scope-info.h"
#include "src/objects/string.h"
#include "src/string-hasher.h"
namespace v8 {
namespace internal {
// Forward declarations.
class AliasedArgumentsEntry;
class BreakPointInfo;
class BreakPoint;
class BoilerplateDescription;
class ConstantElementsPair;
class CoverageInfo;
class DebugInfo;
class FreshlyAllocatedBigInt;
class JSMap;
class JSMapIterator;
class JSModuleNamespace;
class JSSet;
class JSSetIterator;
class JSWeakMap;
class NewFunctionArgs;
struct SourceRange;
class PreParsedScopeData;
class TemplateObjectDescription;
enum FunctionMode {
kWithNameBit = 1 << 0,
kWithHomeObjectBit = 1 << 1,
kWithWritablePrototypeBit = 1 << 2,
kWithReadonlyPrototypeBit = 1 << 3,
kWithPrototypeBits = kWithWritablePrototypeBit | kWithReadonlyPrototypeBit,
// Without prototype.
METHOD_WITH_NAME_AND_HOME_OBJECT = kWithNameBit | kWithHomeObjectBit,
// With writable prototype.
kWithWritablePrototypeBit | kWithNameBit,
kWithWritablePrototypeBit | kWithHomeObjectBit,
kWithWritablePrototypeBit | kWithNameBit | kWithHomeObjectBit,
// With readonly prototype.
kWithReadonlyPrototypeBit | kWithNameBit,
// Interface for handle based allocation.
class V8_EXPORT_PRIVATE Factory final {
Handle<Oddball> NewOddball(Handle<Map> map, const char* to_string,
Handle<Object> to_number, const char* type_of,
byte kind);
// Allocates a fixed array-like object with given map and initialized with
// undefined values.
Handle<FixedArray> NewFixedArrayWithMap(Heap::RootListIndex map_root_index,
int length, PretenureFlag pretenure);
// Allocates a fixed array initialized with undefined values.
Handle<FixedArray> NewFixedArray(int length,
PretenureFlag pretenure = NOT_TENURED);
Handle<PropertyArray> NewPropertyArray(int length,
PretenureFlag pretenure = NOT_TENURED);
// Tries allocating a fixed array initialized with undefined values.
// In case of an allocation failure (OOM) an empty handle is returned.
// The caller has to manually signal an
// v8::internal::Heap::FatalProcessOutOfMemory typically by calling
// NewFixedArray as a fallback.
MaybeHandle<FixedArray> TryNewFixedArray(
int length, PretenureFlag pretenure = NOT_TENURED);
// Allocate a new fixed array with non-existing entries (the hole).
Handle<FixedArray> NewFixedArrayWithHoles(
int length, PretenureFlag pretenure = NOT_TENURED);
// Allocates an uninitialized fixed array. It must be filled by the caller.
Handle<FixedArray> NewUninitializedFixedArray(int length);
// Allocates a feedback vector whose slots are initialized with undefined
// values.
Handle<FeedbackVector> NewFeedbackVector(
Handle<SharedFunctionInfo> shared, PretenureFlag pretenure = NOT_TENURED);
// Allocates a fixed array for name-value pairs of boilerplate properties and
// calculates the number of properties we need to store in the backing store.
Handle<BoilerplateDescription> NewBoilerplateDescription(int boilerplate,
int all_properties,
int index_keys,
bool has_seen_proto);
// Allocate a new uninitialized fixed double array.
// The function returns a pre-allocated empty fixed array for capacity = 0,
// so the return type must be the general fixed array class.
Handle<FixedArrayBase> NewFixedDoubleArray(
int size,
PretenureFlag pretenure = NOT_TENURED);
// Allocate a new fixed double array with hole values.
Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles(
int size,
PretenureFlag pretenure = NOT_TENURED);
Handle<FrameArray> NewFrameArray(int number_of_frames,
PretenureFlag pretenure = NOT_TENURED);
Handle<OrderedHashSet> NewOrderedHashSet();
Handle<OrderedHashMap> NewOrderedHashMap();
Handle<SmallOrderedHashSet> NewSmallOrderedHashSet(
int size = SmallOrderedHashSet::kMinCapacity,
PretenureFlag pretenure = NOT_TENURED);
Handle<SmallOrderedHashMap> NewSmallOrderedHashMap(
int size = SmallOrderedHashMap::kMinCapacity,
PretenureFlag pretenure = NOT_TENURED);
// Create a new PrototypeInfo struct.
Handle<PrototypeInfo> NewPrototypeInfo();
// Create a new EnumCache struct.
Handle<EnumCache> NewEnumCache(Handle<FixedArray> keys,
Handle<FixedArray> indices);
// Create a new Tuple2 struct.
Handle<Tuple2> NewTuple2(Handle<Object> value1, Handle<Object> value2,
PretenureFlag pretenure);
// Create a new Tuple3 struct.
Handle<Tuple3> NewTuple3(Handle<Object> value1, Handle<Object> value2,
Handle<Object> value3, PretenureFlag pretenure);
// Create a new ContextExtension struct.
Handle<ContextExtension> NewContextExtension(Handle<ScopeInfo> scope_info,
Handle<Object> extension);
// Create a new ConstantElementsPair struct.
Handle<ConstantElementsPair> NewConstantElementsPair(
ElementsKind elements_kind, Handle<FixedArrayBase> constant_values);
// Create a new TemplateObjectDescription struct.
Handle<TemplateObjectDescription> NewTemplateObjectDescription(
int hash, Handle<FixedArray> raw_strings,
Handle<FixedArray> cooked_strings);
// Create a pre-tenured empty AccessorPair.
Handle<AccessorPair> NewAccessorPair();
// Finds the internalized copy for string in the string table.
// If not found, a new string is added to the table and returned.
Handle<String> InternalizeUtf8String(Vector<const char> str);
Handle<String> InternalizeUtf8String(const char* str) {
return InternalizeUtf8String(CStrVector(str));
Handle<String> InternalizeOneByteString(Vector<const uint8_t> str);
Handle<String> InternalizeOneByteString(
Handle<SeqOneByteString>, int from, int length);
Handle<String> InternalizeTwoByteString(Vector<const uc16> str);
template<class StringTableKey>
Handle<String> InternalizeStringWithKey(StringTableKey* key);
// Internalized strings are created in the old generation (data space).
inline Handle<String> InternalizeString(Handle<String> string);
inline Handle<Name> InternalizeName(Handle<Name> name);
// String creation functions. Most of the string creation functions take
// a Heap::PretenureFlag argument to optionally request that they be
// allocated in the old generation. The pretenure flag defaults to
// Creates a new String object. There are two String encodings: one-byte and
// two-byte. One should choose between the three string factory functions
// based on the encoding of the string buffer that the string is
// initialized from.
// - ...FromOneByte initializes the string from a buffer that is Latin1
// encoded (it does not check that the buffer is Latin1 encoded) and
// the result will be Latin1 encoded.
// - ...FromUtf8 initializes the string from a buffer that is UTF-8
// encoded. If the characters are all ASCII characters, the result
// will be Latin1 encoded, otherwise it will converted to two-byte.
// - ...FromTwoByte initializes the string from a buffer that is two-byte
// encoded. If the characters are all Latin1 characters, the result
// will be converted to Latin1, otherwise it will be left as two-byte.
// One-byte strings are pretenured when used as keys in the SourceCodeCache.
MUST_USE_RESULT MaybeHandle<String> NewStringFromOneByte(
Vector<const uint8_t> str, PretenureFlag pretenure = NOT_TENURED);
template <size_t N>
inline Handle<String> NewStringFromStaticChars(
const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) {
DCHECK(N == StrLength(str) + 1);
return NewStringFromOneByte(STATIC_CHAR_VECTOR(str), pretenure)
inline Handle<String> NewStringFromAsciiChecked(
const char* str,
PretenureFlag pretenure = NOT_TENURED) {
return NewStringFromOneByte(
OneByteVector(str), pretenure).ToHandleChecked();
// UTF8 strings are pretenured when used for regexp literal patterns and
// flags in the parser.
MUST_USE_RESULT MaybeHandle<String> NewStringFromUtf8(
Vector<const char> str, PretenureFlag pretenure = NOT_TENURED);
MUST_USE_RESULT MaybeHandle<String> NewStringFromUtf8SubString(
Handle<SeqOneByteString> str, int begin, int end,
PretenureFlag pretenure = NOT_TENURED);
MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte(
Vector<const uc16> str, PretenureFlag pretenure = NOT_TENURED);
MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte(
const ZoneVector<uc16>* str, PretenureFlag pretenure = NOT_TENURED);
Handle<JSStringIterator> NewJSStringIterator(Handle<String> string);
// Allocates an internalized string in old space based on the character
// stream.
Handle<String> NewInternalizedStringFromUtf8(Vector<const char> str,
int chars, uint32_t hash_field);
Handle<String> NewOneByteInternalizedString(Vector<const uint8_t> str,
uint32_t hash_field);
Handle<String> NewOneByteInternalizedSubString(
Handle<SeqOneByteString> string, int offset, int length,
uint32_t hash_field);
Handle<String> NewTwoByteInternalizedString(Vector<const uc16> str,
uint32_t hash_field);
Handle<String> NewInternalizedStringImpl(Handle<String> string, int chars,
uint32_t hash_field);
// Compute the matching internalized string map for a string if possible.
// Empty handle is returned if string is in new space or not flattened.
MUST_USE_RESULT MaybeHandle<Map> InternalizedStringMapForString(
Handle<String> string);
// Creates an internalized copy of an external string. |string| must be
// of type StringClass.
template <class StringClass>
Handle<StringClass> InternalizeExternalString(Handle<String> string);
// Allocates and partially initializes an one-byte or two-byte String. The
// characters of the string are uninitialized. Currently used in regexp code
// only, where they are pretenured.
MUST_USE_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
int length,
PretenureFlag pretenure = NOT_TENURED);
MUST_USE_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString(
int length,
PretenureFlag pretenure = NOT_TENURED);
// Creates a single character string where the character has given code.
// A cache is used for Latin1 codes.
Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
// Create a new cons string object which consists of a pair of strings.
MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
Handle<String> right);
MUST_USE_RESULT Handle<String> NewConsString(Handle<String> left,
Handle<String> right, int length,
bool one_byte);
// Create or lookup a single characters tring made up of a utf16 surrogate
// pair.
Handle<String> NewSurrogatePairString(uint16_t lead, uint16_t trail);
// Create a new string object which holds a proper substring of a string.
Handle<String> NewProperSubString(Handle<String> str,
int begin,
int end);
// Create a new string object which holds a substring of a string.
inline Handle<String> NewSubString(Handle<String> str, int begin, int end);
// Creates a new external String object. There are two String encodings
// in the system: one-byte and two-byte. Unlike other String types, it does
// not make sense to have a UTF-8 factory function for external strings,
// because we cannot change the underlying buffer. Note that these strings
// are backed by a string resource that resides outside the V8 heap.
MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
const ExternalOneByteString::Resource* resource);
MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
const ExternalTwoByteString::Resource* resource);
// Create a new external string object for one-byte encoded native script.
// It does not cache the resource data pointer.
Handle<ExternalOneByteString> NewNativeSourceString(
const ExternalOneByteString::Resource* resource);
// Create a symbol.
Handle<Symbol> NewSymbol();
Handle<Symbol> NewPrivateSymbol();
// Create a global (but otherwise uninitialized) context.
Handle<Context> NewNativeContext();
// Create a script context.
Handle<Context> NewScriptContext(Handle<JSFunction> function,
Handle<ScopeInfo> scope_info);
// Create an empty script context table.
Handle<ScriptContextTable> NewScriptContextTable();
// Create a module context.
Handle<Context> NewModuleContext(Handle<Module> module,
Handle<JSFunction> function,
Handle<ScopeInfo> scope_info);
// Create a function or eval context.
Handle<Context> NewFunctionContext(int length, Handle<JSFunction> function,
ScopeType scope_type);
// Create a catch context.
Handle<Context> NewCatchContext(Handle<JSFunction> function,
Handle<Context> previous,
Handle<ScopeInfo> scope_info,
Handle<String> name,
Handle<Object> thrown_object);
// Create a 'with' context.
Handle<Context> NewWithContext(Handle<JSFunction> function,
Handle<Context> previous,
Handle<ScopeInfo> scope_info,
Handle<JSReceiver> extension);
Handle<Context> NewDebugEvaluateContext(Handle<Context> previous,
Handle<ScopeInfo> scope_info,
Handle<JSReceiver> extension,
Handle<Context> wrapped,
Handle<StringSet> whitelist);
// Create a block context.
Handle<Context> NewBlockContext(Handle<JSFunction> function,
Handle<Context> previous,
Handle<ScopeInfo> scope_info);
Handle<Struct> NewStruct(InstanceType type,
PretenureFlag pretenure = NOT_TENURED);
Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
int aliased_context_slot);
Handle<AccessorInfo> NewAccessorInfo();
Handle<Script> NewScript(Handle<String> source);
Handle<BreakPointInfo> NewBreakPointInfo(int source_position);
Handle<BreakPoint> NewBreakPoint(int id, Handle<String> condition);
Handle<StackFrameInfo> NewStackFrameInfo();
Handle<ByteArray> source_position_table,
Handle<NumberDictionary> stack_frame_cache);
// Foreign objects are pretenured when allocated by the bootstrapper.
Handle<Foreign> NewForeign(Address addr,
PretenureFlag pretenure = NOT_TENURED);
// Allocate a new foreign object. The foreign is pretenured (allocated
// directly in the old generation).
Handle<Foreign> NewForeign(const AccessorDescriptor* foreign);
Handle<ByteArray> NewByteArray(int length,
PretenureFlag pretenure = NOT_TENURED);
Handle<BytecodeArray> NewBytecodeArray(int length, const byte* raw_bytecodes,
int frame_size, int parameter_count,
Handle<FixedArray> constant_pool);
Handle<FixedTypedArrayBase> NewFixedTypedArrayWithExternalPointer(
int length, ExternalArrayType array_type, void* external_pointer,
PretenureFlag pretenure = NOT_TENURED);
Handle<FixedTypedArrayBase> NewFixedTypedArray(
int length, ExternalArrayType array_type, bool initialize,
PretenureFlag pretenure = NOT_TENURED);
Handle<Cell> NewCell(Handle<Object> value);
Handle<PropertyCell> NewPropertyCell(Handle<Name> name);
Handle<WeakCell> NewWeakCell(Handle<HeapObject> value);
Handle<Cell> NewNoClosuresCell(Handle<Object> value);
Handle<Cell> NewOneClosureCell(Handle<Object> value);
Handle<Cell> NewManyClosuresCell(Handle<Object> value);
Handle<TransitionArray> NewTransitionArray(int capacity);
// Allocate a tenured AllocationSite. It's payload is null.
Handle<AllocationSite> NewAllocationSite();
Handle<Map> NewMap(InstanceType type, int instance_size,
ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
int inobject_properties = 0);
Handle<HeapObject> NewFillerObject(int size,
bool double_align,
AllocationSpace space);
Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
Handle<JSObject> CopyJSObject(Handle<JSObject> object);
Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object,
Handle<AllocationSite> site);
Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array,
Handle<Map> map);
Handle<FixedArray> CopyFixedArrayAndGrow(
Handle<FixedArray> array, int grow_by,
PretenureFlag pretenure = NOT_TENURED);
Handle<PropertyArray> CopyPropertyArrayAndGrow(
Handle<PropertyArray> array, int grow_by,
PretenureFlag pretenure = NOT_TENURED);
Handle<FixedArray> CopyFixedArrayUpTo(Handle<FixedArray> array, int new_len,
PretenureFlag pretenure = NOT_TENURED);
Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
// This method expects a COW array in new space, and creates a copy
// of it in old space.
Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
Handle<FixedDoubleArray> CopyFixedDoubleArray(
Handle<FixedDoubleArray> array);
Handle<FeedbackVector> CopyFeedbackVector(Handle<FeedbackVector> array);
// Numbers (e.g. literals) are pretenured by the parser.
// The return value may be a smi or a heap number.
Handle<Object> NewNumber(double value,
PretenureFlag pretenure = NOT_TENURED);
Handle<Object> NewNumberFromInt(int32_t value,
PretenureFlag pretenure = NOT_TENURED);
Handle<Object> NewNumberFromUint(uint32_t value,
PretenureFlag pretenure = NOT_TENURED);
inline Handle<Object> NewNumberFromSize(
size_t value, PretenureFlag pretenure = NOT_TENURED);
inline Handle<Object> NewNumberFromInt64(
int64_t value, PretenureFlag pretenure = NOT_TENURED);
inline Handle<HeapNumber> NewHeapNumber(
double value, MutableMode mode = IMMUTABLE,
PretenureFlag pretenure = NOT_TENURED);
inline Handle<HeapNumber> NewHeapNumberFromBits(
uint64_t bits, MutableMode mode = IMMUTABLE,
PretenureFlag pretenure = NOT_TENURED);
// Creates mutable heap number object with value field set to hole NaN.
inline Handle<HeapNumber> NewMutableHeapNumber(
PretenureFlag pretenure = NOT_TENURED);
// Creates heap number object with not yet set value field.
Handle<HeapNumber> NewHeapNumber(MutableMode mode,
PretenureFlag pretenure = NOT_TENURED);
// Allocates a new BigInt with {length} digits. Only to be used by
// MutableBigInt::New*.
Handle<FreshlyAllocatedBigInt> NewBigInt(int length);
Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
// JS objects are pretenured when allocated by the bootstrapper and
// runtime.
Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
PretenureFlag pretenure = NOT_TENURED);
// JSObject without a prototype.
Handle<JSObject> NewJSObjectWithNullProto(
PretenureFlag pretenure = NOT_TENURED);
// Global objects are pretenured and initialized based on a constructor.
Handle<JSGlobalObject> NewJSGlobalObject(Handle<JSFunction> constructor);
// JS objects are pretenured when allocated by the bootstrapper and
// runtime.
Handle<JSObject> NewJSObjectFromMap(
Handle<Map> map,
PretenureFlag pretenure = NOT_TENURED,
Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
Handle<JSObject> NewSlowJSObjectFromMap(
Handle<Map> map,
int number_of_slow_properties = NameDictionary::kInitialCapacity,
PretenureFlag pretenure = NOT_TENURED);
// JS arrays are pretenured when allocated by the parser.
// Create a JSArray with a specified length and elements initialized
// according to the specified mode.
Handle<JSArray> NewJSArray(
ElementsKind elements_kind, int length, int capacity,
ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
PretenureFlag pretenure = NOT_TENURED);
Handle<JSArray> NewJSArray(
int capacity, ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
PretenureFlag pretenure = NOT_TENURED) {
if (capacity != 0) {
elements_kind = GetHoleyElementsKind(elements_kind);
return NewJSArray(elements_kind, 0, capacity,
// Create a JSArray with the given elements.
Handle<JSArray> NewJSArrayWithElements(Handle<FixedArrayBase> elements,
ElementsKind elements_kind, int length,
PretenureFlag pretenure = NOT_TENURED);
inline Handle<JSArray> NewJSArrayWithElements(
Handle<FixedArrayBase> elements,
ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
PretenureFlag pretenure = NOT_TENURED);
void NewJSArrayStorage(
Handle<JSArray> array,
int length,
int capacity,
ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
Handle<JSWeakMap> NewJSWeakMap();
Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
Handle<JSModuleNamespace> NewJSModuleNamespace();
Handle<Module> NewModule(Handle<SharedFunctionInfo> code);
Handle<JSArrayBuffer> NewJSArrayBuffer(
SharedFlag shared = SharedFlag::kNotShared,
PretenureFlag pretenure = NOT_TENURED);
ExternalArrayType GetArrayTypeFromElementsKind(ElementsKind kind);
size_t GetExternalArrayElementSize(ExternalArrayType type);
Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
PretenureFlag pretenure = NOT_TENURED);
Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
PretenureFlag pretenure = NOT_TENURED);
// Creates a new JSTypedArray with the specified buffer.
Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
Handle<JSArrayBuffer> buffer,
size_t byte_offset, size_t length,
PretenureFlag pretenure = NOT_TENURED);
// Creates a new on-heap JSTypedArray.
Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
size_t number_of_elements,
PretenureFlag pretenure = NOT_TENURED);
Handle<JSDataView> NewJSDataView();
Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer,
size_t byte_offset, size_t byte_length);
Handle<JSIteratorResult> NewJSIteratorResult(Handle<Object> value, bool done);
Handle<JSAsyncFromSyncIterator> NewJSAsyncFromSyncIterator(
Handle<JSReceiver> sync_iterator);
Handle<JSMap> NewJSMap();
Handle<JSSet> NewJSSet();
Handle<JSMapIterator> NewJSMapIterator(Handle<Map> map,
Handle<OrderedHashMap> table,
int index);
Handle<JSSetIterator> NewJSSetIterator(Handle<Map> map,
Handle<OrderedHashSet> table,
int index);
// Allocates a bound function.
MaybeHandle<JSBoundFunction> NewJSBoundFunction(
Handle<JSReceiver> target_function, Handle<Object> bound_this,
Vector<Handle<Object>> bound_args);
// Allocates a Harmony proxy.
Handle<JSProxy> NewJSProxy(Handle<JSReceiver> target,
Handle<JSReceiver> handler);
// Reinitialize an JSGlobalProxy based on a constructor. The object
// must have the same size as objects allocated using the
// constructor. The object is reinitialized and behaves as an
// object that has been freshly allocated using the constructor.
void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
Handle<JSFunction> constructor);
Handle<JSGlobalProxy> NewUninitializedJSGlobalProxy(int size);
// Creates a new JSFunction according to the given args. This is the function
// you'll probably want to use when creating a JSFunction from the runtime.
Handle<JSFunction> NewFunction(const NewFunctionArgs& args);
// For testing only. Creates a sloppy function without code.
Handle<JSFunction> NewFunctionForTest(Handle<String> name);
// Function creation from SharedFunctionInfo.
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info,
Handle<Object> context_or_undefined, Handle<Cell> vector,
PretenureFlag pretenure = TENURED);
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
Handle<SharedFunctionInfo> function_info, Handle<Context> context,
Handle<Cell> vector, PretenureFlag pretenure = TENURED);
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info,
Handle<Object> context_or_undefined, PretenureFlag pretenure = TENURED);
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
Handle<SharedFunctionInfo> function_info, Handle<Context> context,
PretenureFlag pretenure = TENURED);
// The choke-point for JSFunction creation. Handles allocation and
// initialization. All other utility methods call into this.
Handle<JSFunction> NewFunction(Handle<Map> map,
Handle<SharedFunctionInfo> info,
Handle<Object> context_or_undefined,
PretenureFlag pretenure = TENURED);
// Create a serialized scope info.
Handle<ScopeInfo> NewScopeInfo(int length);
Handle<ModuleInfoEntry> NewModuleInfoEntry();
Handle<ModuleInfo> NewModuleInfo();
Handle<PreParsedScopeData> NewPreParsedScopeData();
// Create an External object for V8's external API.
Handle<JSObject> NewExternal(void* value);
// Creates a new CodeDataContainer for a Code object.
Handle<CodeDataContainer> NewCodeDataContainer(int flags);
// The reference to the Code object is stored in self_reference.
// This allows generated code to reference its own Code object
// by containing this handle.
Handle<Code> NewCode(const CodeDesc& desc, Code::Kind kind,
Handle<Object> self_reference,
int32_t builtin_index = Builtins::kNoBuiltinId,
MaybeHandle<HandlerTable> maybe_handler_table =
MaybeHandle<ByteArray> maybe_source_position_table =
MaybeHandle<DeoptimizationData> maybe_deopt_data =
Movability movability = kMovable, uint32_t stub_key = 0,
bool is_turbofanned = false, int stack_slots = 0,
int safepoint_table_offset = 0);
// Allocates a new, empty code object for use by builtin deserialization. The
// given {size} argument specifies the size of the entire code object.
Handle<Code> NewCodeForDeserialization(uint32_t size);
Handle<Code> CopyCode(Handle<Code> code);
Handle<BytecodeArray> CopyBytecodeArray(Handle<BytecodeArray>);
// Interface for creating error objects.
Handle<Object> NewError(Handle<JSFunction> constructor,
Handle<String> message);
Handle<Object> NewInvalidStringLengthError();
inline Handle<Object> NewURIError();
Handle<Object> NewError(Handle<JSFunction> constructor,
MessageTemplate::Template template_index,
Handle<Object> arg0 = Handle<Object>(),
Handle<Object> arg1 = Handle<Object>(),
Handle<Object> arg2 = Handle<Object>());
Handle<Object> New##NAME(MessageTemplate::Template template_index, \
Handle<Object> arg0 = Handle<Object>(), \
Handle<Object> arg1 = Handle<Object>(), \
Handle<Object> arg2 = Handle<Object>());
Handle<String> NumberToString(Handle<Object> number,
bool check_number_string_cache = true);
inline Handle<String> Uint32ToString(uint32_t value);
Handle<JSFunction> InstallMembers(Handle<JSFunction> function);
#define ROOT_ACCESSOR(type, name, camel_name) inline Handle<type> name();
#define STRUCT_MAP_ACCESSOR(NAME, Name, name) inline Handle<Map> name##_map();
#define DATA_HANDLER_MAP_ACCESSOR(NAME, Name, Size, name) \
inline Handle<Map> name##_map();
#define STRING_ACCESSOR(name, str) inline Handle<String> name();
#define SYMBOL_ACCESSOR(name) inline Handle<Symbol> name();
#define SYMBOL_ACCESSOR(name, description) inline Handle<Symbol> name();
#define ACCESSOR_INFO_ACCESSOR(accessor_name, AccessorName) \
inline Handle<AccessorInfo> accessor_name##_accessor();
// Allocates a new SharedFunctionInfo object.
Handle<SharedFunctionInfo> NewSharedFunctionInfo(
MaybeHandle<String> name, FunctionKind kind, Handle<Code> code,
Handle<ScopeInfo> scope_info);
Handle<SharedFunctionInfo> NewSharedFunctionInfo(
MaybeHandle<String> name, MaybeHandle<Code> code, bool is_constructor,
FunctionKind kind = kNormalFunction,
int maybe_builtin_index = Builtins::kNoBuiltinId);
Handle<SharedFunctionInfo> NewSharedFunctionInfoForLiteral(
FunctionLiteral* literal, Handle<Script> script);
static bool IsFunctionModeWithPrototype(FunctionMode function_mode) {
return (function_mode & kWithPrototypeBits) != 0;
static bool IsFunctionModeWithWritablePrototype(FunctionMode function_mode) {
return (function_mode & kWithWritablePrototypeBit) != 0;
static bool IsFunctionModeWithName(FunctionMode function_mode) {
return (function_mode & kWithNameBit) != 0;
static bool IsFunctionModeWithHomeObject(FunctionMode function_mode) {
return (function_mode & kWithHomeObjectBit) != 0;
Handle<Map> CreateSloppyFunctionMap(
FunctionMode function_mode, MaybeHandle<JSFunction> maybe_empty_function);
Handle<Map> CreateStrictFunctionMap(FunctionMode function_mode,
Handle<JSFunction> empty_function);
Handle<Map> CreateClassFunctionMap(Handle<JSFunction> empty_function);
// Allocates a new JSMessageObject object.
Handle<JSMessageObject> NewJSMessageObject(MessageTemplate::Template message,
Handle<Object> argument,
int start_position,
int end_position,
Handle<Object> script,
Handle<Object> stack_frames);
Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
Handle<CoverageInfo> NewCoverageInfo(const ZoneVector<SourceRange>& slots);
// Return a map for given number of properties using the map cache in the
// native context.
Handle<Map> ObjectLiteralMapFromCache(Handle<Context> native_context,
int number_of_properties);
Handle<LoadHandler> NewLoadHandler(int data_count);
Handle<StoreHandler> NewStoreHandler(int data_count);
Handle<RegExpMatchInfo> NewRegExpMatchInfo();
// Creates a new FixedArray that holds the data associated with the
// atom regexp and stores it in the regexp.
void SetRegExpAtomData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
Handle<Object> match_pattern);
// Creates a new FixedArray that holds the data associated with the
// irregexp regexp and stores it in the regexp.
void SetRegExpIrregexpData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
int capture_count);
// Returns the value for a known global constant (a property of the global
// object which is neither configurable nor writable) like 'undefined'.
// Returns a null handle when the given name is unknown.
Handle<Object> GlobalConstantFor(Handle<Name> name);
// Converts the given boolean condition to JavaScript boolean value.
Handle<Object> ToBoolean(bool value);
// Converts the given ToPrimitive hint to it's string representation.
Handle<String> ToPrimitiveHintString(ToPrimitiveHint hint);
Isolate* isolate() { return reinterpret_cast<Isolate*>(this); }
// Creates a heap object based on the map. The fields of the heap object are
// not initialized by New<>() functions. It's the responsibility of the caller
// to do that.
template<typename T>
Handle<T> New(Handle<Map> map, AllocationSpace space);
template<typename T>
Handle<T> New(Handle<Map> map,
AllocationSpace space,
Handle<AllocationSite> allocation_site);
MaybeHandle<String> NewStringFromTwoByte(const uc16* string, int length,
PretenureFlag pretenure);
// Attempt to find the number in a small cache. If we finds it, return
// the string representation of the number. Otherwise return undefined.
Handle<Object> GetNumberStringCache(Handle<Object> number);
// Update the cache with a new number-string pair.
void SetNumberStringCache(Handle<Object> number, Handle<String> string);
// Create a JSArray with no elements and no length.
Handle<JSArray> NewJSArray(ElementsKind elements_kind,
PretenureFlag pretenure = NOT_TENURED);
// Utility class to simplify argument handling around JSFunction creation.
class NewFunctionArgs final {
static NewFunctionArgs ForWasm(Handle<String> name, Handle<Code> code,
Handle<Map> map);
static NewFunctionArgs ForBuiltin(Handle<String> name, Handle<Code> code,
Handle<Map> map, int builtin_id);
static NewFunctionArgs ForFunctionWithoutCode(Handle<String> name,
Handle<Map> map,
LanguageMode language_mode);
static NewFunctionArgs ForBuiltinWithPrototype(
Handle<String> name, Handle<Code> code, Handle<Object> prototype,
InstanceType type, int instance_size, int inobject_properties,
int builtin_id, MutableMode prototype_mutability);
static NewFunctionArgs ForBuiltinWithoutPrototype(Handle<String> name,
Handle<Code> code,
int builtin_id,
LanguageMode language_mode);
Handle<Map> GetMap(Isolate* isolate) const;
NewFunctionArgs() {} // Use the static factory constructors.
void SetShouldCreateAndSetInitialMap();
void SetShouldSetPrototype();
void SetShouldSetLanguageMode();
// Sentinel value.
static const int kUninitialized = -1;
Handle<String> name_;
MaybeHandle<Map> maybe_map_;
MaybeHandle<Code> maybe_code_;
bool should_create_and_set_initial_map_ = false;
InstanceType type_;
int instance_size_ = kUninitialized;
int inobject_properties_ = kUninitialized;
bool should_set_prototype_ = false;
MaybeHandle<Object> maybe_prototype_;
bool should_set_language_mode_ = false;
LanguageMode language_mode_;
int maybe_builtin_id_ = kUninitialized;
MutableMode prototype_mutability_;
friend class Factory;
} // namespace internal
} // namespace v8
#endif // V8_FACTORY_H_