1 // Copyright 2014 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
8 #include "src/isolate.h"
13 // Interface for handle based allocation.
17 Handle<Oddball> NewOddball(Handle<Map> map,
18 const char* to_string,
19 Handle<Object> to_number,
22 // Allocates a fixed array initialized with undefined values.
23 Handle<FixedArray> NewFixedArray(
25 PretenureFlag pretenure = NOT_TENURED);
27 // Allocate a new fixed array with non-existing entries (the hole).
28 Handle<FixedArray> NewFixedArrayWithHoles(
30 PretenureFlag pretenure = NOT_TENURED);
32 // Allocates an uninitialized fixed array. It must be filled by the caller.
33 Handle<FixedArray> NewUninitializedFixedArray(int size);
35 // Allocate a new uninitialized fixed double array.
36 // The function returns a pre-allocated empty fixed array for capacity = 0,
37 // so the return type must be the general fixed array class.
38 Handle<FixedArrayBase> NewFixedDoubleArray(
40 PretenureFlag pretenure = NOT_TENURED);
42 // Allocate a new fixed double array with hole values.
43 Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles(
45 PretenureFlag pretenure = NOT_TENURED);
47 Handle<ConstantPoolArray> NewConstantPoolArray(
48 const ConstantPoolArray::NumberOfEntries& small);
50 Handle<ConstantPoolArray> NewExtendedConstantPoolArray(
51 const ConstantPoolArray::NumberOfEntries& small,
52 const ConstantPoolArray::NumberOfEntries& extended);
54 Handle<OrderedHashSet> NewOrderedHashSet();
55 Handle<OrderedHashMap> NewOrderedHashMap();
57 // Create a new boxed value.
58 Handle<Box> NewBox(Handle<Object> value);
60 // Create a pre-tenured empty AccessorPair.
61 Handle<AccessorPair> NewAccessorPair();
63 // Create an empty TypeFeedbackInfo.
64 Handle<TypeFeedbackInfo> NewTypeFeedbackInfo();
66 // Finds the internalized copy for string in the string table.
67 // If not found, a new string is added to the table and returned.
68 Handle<String> InternalizeUtf8String(Vector<const char> str);
69 Handle<String> InternalizeUtf8String(const char* str) {
70 return InternalizeUtf8String(CStrVector(str));
72 Handle<String> InternalizeString(Handle<String> str);
73 Handle<String> InternalizeOneByteString(Vector<const uint8_t> str);
74 Handle<String> InternalizeOneByteString(
75 Handle<SeqOneByteString>, int from, int length);
77 Handle<String> InternalizeTwoByteString(Vector<const uc16> str);
79 template<class StringTableKey>
80 Handle<String> InternalizeStringWithKey(StringTableKey* key);
83 // String creation functions. Most of the string creation functions take
84 // a Heap::PretenureFlag argument to optionally request that they be
85 // allocated in the old generation. The pretenure flag defaults to
88 // Creates a new String object. There are two String encodings: one-byte and
89 // two-byte. One should choose between the three string factory functions
90 // based on the encoding of the string buffer that the string is
92 // - ...FromOneByte initializes the string from a buffer that is Latin1
93 // encoded (it does not check that the buffer is Latin1 encoded) and
94 // the result will be Latin1 encoded.
95 // - ...FromUtf8 initializes the string from a buffer that is UTF-8
96 // encoded. If the characters are all ASCII characters, the result
97 // will be Latin1 encoded, otherwise it will converted to two-byte.
98 // - ...FromTwoByte initializes the string from a buffer that is two-byte
99 // encoded. If the characters are all Latin1 characters, the result
100 // will be converted to Latin1, otherwise it will be left as two-byte.
102 // One-byte strings are pretenured when used as keys in the SourceCodeCache.
103 MUST_USE_RESULT MaybeHandle<String> NewStringFromOneByte(
104 Vector<const uint8_t> str,
105 PretenureFlag pretenure = NOT_TENURED);
108 inline Handle<String> NewStringFromStaticChars(
109 const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) {
110 DCHECK(N == StrLength(str) + 1);
111 return NewStringFromOneByte(STATIC_CHAR_VECTOR(str), pretenure)
115 inline Handle<String> NewStringFromAsciiChecked(
117 PretenureFlag pretenure = NOT_TENURED) {
118 return NewStringFromOneByte(
119 OneByteVector(str), pretenure).ToHandleChecked();
123 // Allocates and fully initializes a String. There are two String encodings:
124 // one-byte and two-byte. One should choose between the threestring
125 // allocation functions based on the encoding of the string buffer used to
126 // initialized the string.
127 // - ...FromOneByte initializes the string from a buffer that is Latin1
128 // encoded (it does not check that the buffer is Latin1 encoded) and the
129 // result will be Latin1 encoded.
130 // - ...FromUTF8 initializes the string from a buffer that is UTF-8
131 // encoded. If the characters are all ASCII characters, the result
132 // will be Latin1 encoded, otherwise it will converted to two-byte.
133 // - ...FromTwoByte initializes the string from a buffer that is two-byte
134 // encoded. If the characters are all Latin1 characters, the
135 // result will be converted to Latin1, otherwise it will be left as
138 // TODO(dcarney): remove this function.
139 MUST_USE_RESULT inline MaybeHandle<String> NewStringFromAscii(
140 Vector<const char> str,
141 PretenureFlag pretenure = NOT_TENURED) {
142 return NewStringFromOneByte(Vector<const uint8_t>::cast(str), pretenure);
145 // UTF8 strings are pretenured when used for regexp literal patterns and
146 // flags in the parser.
147 MUST_USE_RESULT MaybeHandle<String> NewStringFromUtf8(
148 Vector<const char> str,
149 PretenureFlag pretenure = NOT_TENURED);
151 MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte(
152 Vector<const uc16> str,
153 PretenureFlag pretenure = NOT_TENURED);
155 // Allocates an internalized string in old space based on the character
157 MUST_USE_RESULT Handle<String> NewInternalizedStringFromUtf8(
158 Vector<const char> str,
160 uint32_t hash_field);
162 MUST_USE_RESULT Handle<String> NewOneByteInternalizedString(
163 Vector<const uint8_t> str, uint32_t hash_field);
165 MUST_USE_RESULT Handle<String> NewOneByteInternalizedSubString(
166 Handle<SeqOneByteString> string, int offset, int length,
167 uint32_t hash_field);
169 MUST_USE_RESULT Handle<String> NewTwoByteInternalizedString(
170 Vector<const uc16> str,
171 uint32_t hash_field);
173 MUST_USE_RESULT Handle<String> NewInternalizedStringImpl(
174 Handle<String> string, int chars, uint32_t hash_field);
176 // Compute the matching internalized string map for a string if possible.
177 // Empty handle is returned if string is in new space or not flattened.
178 MUST_USE_RESULT MaybeHandle<Map> InternalizedStringMapForString(
179 Handle<String> string);
181 // Allocates and partially initializes an one-byte or two-byte String. The
182 // characters of the string are uninitialized. Currently used in regexp code
183 // only, where they are pretenured.
184 MUST_USE_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
186 PretenureFlag pretenure = NOT_TENURED);
187 MUST_USE_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString(
189 PretenureFlag pretenure = NOT_TENURED);
191 // Creates a single character string where the character has given code.
192 // A cache is used for Latin1 codes.
193 Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
195 // Create a new cons string object which consists of a pair of strings.
196 MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
197 Handle<String> right);
199 // Create a new string object which holds a proper substring of a string.
200 Handle<String> NewProperSubString(Handle<String> str,
204 // Create a new string object which holds a substring of a string.
205 Handle<String> NewSubString(Handle<String> str, int begin, int end) {
206 if (begin == 0 && end == str->length()) return str;
207 return NewProperSubString(str, begin, end);
210 // Creates a new external String object. There are two String encodings
211 // in the system: one-byte and two-byte. Unlike other String types, it does
212 // not make sense to have a UTF-8 factory function for external strings,
213 // because we cannot change the underlying buffer. Note that these strings
214 // are backed by a string resource that resides outside the V8 heap.
215 MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
216 const ExternalOneByteString::Resource* resource);
217 MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
218 const ExternalTwoByteString::Resource* resource);
221 Handle<Symbol> NewSymbol();
222 Handle<Symbol> NewPrivateSymbol();
223 Handle<Symbol> NewPrivateOwnSymbol();
225 // Create a global (but otherwise uninitialized) context.
226 Handle<Context> NewNativeContext();
228 // Create a global context.
229 Handle<Context> NewGlobalContext(Handle<JSFunction> function,
230 Handle<ScopeInfo> scope_info);
232 // Create a module context.
233 Handle<Context> NewModuleContext(Handle<ScopeInfo> scope_info);
235 // Create a function context.
236 Handle<Context> NewFunctionContext(int length, Handle<JSFunction> function);
238 // Create a catch context.
239 Handle<Context> NewCatchContext(Handle<JSFunction> function,
240 Handle<Context> previous,
242 Handle<Object> thrown_object);
244 // Create a 'with' context.
245 Handle<Context> NewWithContext(Handle<JSFunction> function,
246 Handle<Context> previous,
247 Handle<JSReceiver> extension);
249 // Create a block context.
250 Handle<Context> NewBlockContext(Handle<JSFunction> function,
251 Handle<Context> previous,
252 Handle<ScopeInfo> scope_info);
254 // Allocate a new struct. The struct is pretenured (allocated directly in
255 // the old generation).
256 Handle<Struct> NewStruct(InstanceType type);
258 Handle<CodeCache> NewCodeCache();
260 Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
261 int aliased_context_slot);
263 Handle<DeclaredAccessorDescriptor> NewDeclaredAccessorDescriptor();
265 Handle<DeclaredAccessorInfo> NewDeclaredAccessorInfo();
267 Handle<ExecutableAccessorInfo> NewExecutableAccessorInfo();
269 Handle<Script> NewScript(Handle<String> source);
271 // Foreign objects are pretenured when allocated by the bootstrapper.
272 Handle<Foreign> NewForeign(Address addr,
273 PretenureFlag pretenure = NOT_TENURED);
275 // Allocate a new foreign object. The foreign is pretenured (allocated
276 // directly in the old generation).
277 Handle<Foreign> NewForeign(const AccessorDescriptor* foreign);
279 Handle<ByteArray> NewByteArray(int length,
280 PretenureFlag pretenure = NOT_TENURED);
282 Handle<ExternalArray> NewExternalArray(
284 ExternalArrayType array_type,
285 void* external_pointer,
286 PretenureFlag pretenure = NOT_TENURED);
288 Handle<FixedTypedArrayBase> NewFixedTypedArray(
290 ExternalArrayType array_type,
291 PretenureFlag pretenure = NOT_TENURED);
293 Handle<Cell> NewCell(Handle<Object> value);
295 Handle<PropertyCell> NewPropertyCellWithHole();
297 Handle<PropertyCell> NewPropertyCell(Handle<Object> value);
299 // Allocate a tenured AllocationSite. It's payload is null.
300 Handle<AllocationSite> NewAllocationSite();
305 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND);
307 Handle<HeapObject> NewFillerObject(int size,
309 AllocationSpace space);
311 Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
313 Handle<JSObject> CopyJSObject(Handle<JSObject> object);
315 Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object,
316 Handle<AllocationSite> site);
318 Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array,
321 Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
323 // This method expects a COW array in new space, and creates a copy
324 // of it in old space.
325 Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
327 Handle<FixedDoubleArray> CopyFixedDoubleArray(
328 Handle<FixedDoubleArray> array);
330 Handle<ConstantPoolArray> CopyConstantPoolArray(
331 Handle<ConstantPoolArray> array);
333 // Numbers (e.g. literals) are pretenured by the parser.
334 // The return value may be a smi or a heap number.
335 Handle<Object> NewNumber(double value,
336 PretenureFlag pretenure = NOT_TENURED);
338 Handle<Object> NewNumberFromInt(int32_t value,
339 PretenureFlag pretenure = NOT_TENURED);
340 Handle<Object> NewNumberFromUint(uint32_t value,
341 PretenureFlag pretenure = NOT_TENURED);
342 Handle<Object> NewNumberFromSize(size_t value,
343 PretenureFlag pretenure = NOT_TENURED) {
344 if (Smi::IsValid(static_cast<intptr_t>(value))) {
345 return Handle<Object>(Smi::FromIntptr(static_cast<intptr_t>(value)),
348 return NewNumber(static_cast<double>(value), pretenure);
350 Handle<HeapNumber> NewHeapNumber(double value,
351 MutableMode mode = IMMUTABLE,
352 PretenureFlag pretenure = NOT_TENURED);
354 Handle<Float32x4> NewFloat32x4(float32x4_value_t value,
355 PretenureFlag pretenure = NOT_TENURED);
357 Handle<Float64x2> NewFloat64x2(float64x2_value_t value,
358 PretenureFlag pretenure = NOT_TENURED);
360 Handle<Int32x4> NewInt32x4(int32x4_value_t value,
361 PretenureFlag pretenure = NOT_TENURED);
363 // These objects are used by the api to create env-independent data
364 // structures in the heap.
365 inline Handle<JSObject> NewNeanderObject() {
366 return NewJSObjectFromMap(neander_map());
369 Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
371 // JS objects are pretenured when allocated by the bootstrapper and
373 Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
374 PretenureFlag pretenure = NOT_TENURED);
375 // JSObject that should have a memento pointing to the allocation site.
376 Handle<JSObject> NewJSObjectWithMemento(Handle<JSFunction> constructor,
377 Handle<AllocationSite> site);
379 // Global objects are pretenured and initialized based on a constructor.
380 Handle<GlobalObject> NewGlobalObject(Handle<JSFunction> constructor);
382 // JS objects are pretenured when allocated by the bootstrapper and
384 Handle<JSObject> NewJSObjectFromMap(
386 PretenureFlag pretenure = NOT_TENURED,
387 bool allocate_properties = true,
388 Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
390 // JS modules are pretenured.
391 Handle<JSModule> NewJSModule(Handle<Context> context,
392 Handle<ScopeInfo> scope_info);
394 // JS arrays are pretenured when allocated by the parser.
396 // Create a JSArray with no elements.
397 Handle<JSArray> NewJSArray(
398 ElementsKind elements_kind,
399 PretenureFlag pretenure = NOT_TENURED);
401 // Create a JSArray with a specified length and elements initialized
402 // according to the specified mode.
403 Handle<JSArray> NewJSArray(
404 ElementsKind elements_kind, int length, int capacity,
405 ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
406 PretenureFlag pretenure = NOT_TENURED);
408 Handle<JSArray> NewJSArray(
410 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
411 PretenureFlag pretenure = NOT_TENURED) {
413 elements_kind = GetHoleyElementsKind(elements_kind);
415 return NewJSArray(elements_kind, 0, capacity,
416 INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure);
419 // Create a JSArray with the given elements.
420 Handle<JSArray> NewJSArrayWithElements(
421 Handle<FixedArrayBase> elements,
422 ElementsKind elements_kind,
424 PretenureFlag pretenure = NOT_TENURED);
426 Handle<JSArray> NewJSArrayWithElements(
427 Handle<FixedArrayBase> elements,
428 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
429 PretenureFlag pretenure = NOT_TENURED) {
430 return NewJSArrayWithElements(
431 elements, elements_kind, elements->length(), pretenure);
434 void NewJSArrayStorage(
435 Handle<JSArray> array,
438 ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
440 Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
442 Handle<JSArrayBuffer> NewJSArrayBuffer();
444 Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type);
446 Handle<JSDataView> NewJSDataView();
448 // Allocates a Harmony proxy.
449 Handle<JSProxy> NewJSProxy(Handle<Object> handler, Handle<Object> prototype);
451 // Allocates a Harmony function proxy.
452 Handle<JSProxy> NewJSFunctionProxy(Handle<Object> handler,
453 Handle<Object> call_trap,
454 Handle<Object> construct_trap,
455 Handle<Object> prototype);
457 // Reinitialize an JSGlobalProxy based on a constructor. The object
458 // must have the same size as objects allocated using the
459 // constructor. The object is reinitialized and behaves as an
460 // object that has been freshly allocated using the constructor.
461 void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
462 Handle<JSFunction> constructor);
464 // Change the type of the argument into a JS object/function and reinitialize.
465 void BecomeJSObject(Handle<JSProxy> object);
466 void BecomeJSFunction(Handle<JSProxy> object);
468 Handle<JSFunction> NewFunction(Handle<String> name,
470 Handle<Object> prototype,
471 bool read_only_prototype = false);
472 Handle<JSFunction> NewFunction(Handle<String> name);
473 Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
476 Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
477 Handle<SharedFunctionInfo> function_info,
478 Handle<Context> context,
479 PretenureFlag pretenure = TENURED);
481 Handle<JSFunction> NewFunction(Handle<String> name,
483 Handle<Object> prototype,
486 bool read_only_prototype = false);
487 Handle<JSFunction> NewFunction(Handle<String> name,
492 // Create a serialized scope info.
493 Handle<ScopeInfo> NewScopeInfo(int length);
495 // Create an External object for V8's external API.
496 Handle<JSObject> NewExternal(void* value);
498 // The reference to the Code object is stored in self_reference.
499 // This allows generated code to reference its own Code object
500 // by containing this handle.
501 Handle<Code> NewCode(const CodeDesc& desc,
503 Handle<Object> self_reference,
504 bool immovable = false,
505 bool crankshafted = false,
506 int prologue_offset = Code::kPrologueOffsetNotSet,
507 bool is_debug = false);
509 Handle<Code> CopyCode(Handle<Code> code);
511 Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info);
513 // Interface for creating error objects.
515 MaybeHandle<Object> NewError(const char* maker, const char* message,
516 Handle<JSArray> args);
517 Handle<String> EmergencyNewError(const char* message, Handle<JSArray> args);
518 MaybeHandle<Object> NewError(const char* maker, const char* message,
519 Vector<Handle<Object> > args);
520 MaybeHandle<Object> NewError(const char* message,
521 Vector<Handle<Object> > args);
522 MaybeHandle<Object> NewError(Handle<String> message);
523 MaybeHandle<Object> NewError(const char* constructor, Handle<String> message);
525 MaybeHandle<Object> NewTypeError(const char* message,
526 Vector<Handle<Object> > args);
527 MaybeHandle<Object> NewTypeError(Handle<String> message);
529 MaybeHandle<Object> NewRangeError(const char* message,
530 Vector<Handle<Object> > args);
531 MaybeHandle<Object> NewRangeError(Handle<String> message);
533 MaybeHandle<Object> NewInvalidStringLengthError() {
534 return NewRangeError("invalid_string_length",
535 HandleVector<Object>(NULL, 0));
538 MaybeHandle<Object> NewSyntaxError(const char* message, Handle<JSArray> args);
539 MaybeHandle<Object> NewSyntaxError(Handle<String> message);
541 MaybeHandle<Object> NewReferenceError(const char* message,
542 Vector<Handle<Object> > args);
543 MaybeHandle<Object> NewReferenceError(const char* message,
544 Handle<JSArray> args);
545 MaybeHandle<Object> NewReferenceError(Handle<String> message);
547 MaybeHandle<Object> NewEvalError(const char* message,
548 Vector<Handle<Object> > args);
550 Handle<String> NumberToString(Handle<Object> number,
551 bool check_number_string_cache = true);
553 Handle<String> Uint32ToString(uint32_t value) {
554 return NumberToString(NewNumberFromUint(value));
557 enum ApiInstanceType {
558 JavaScriptObjectType,
563 Handle<JSFunction> CreateApiFunction(
564 Handle<FunctionTemplateInfo> data,
565 Handle<Object> prototype,
566 ApiInstanceType type = JavaScriptObjectType);
568 Handle<JSFunction> InstallMembers(Handle<JSFunction> function);
570 // Installs interceptors on the instance. 'desc' is a function template,
571 // and instance is an object instance created by the function of this
572 // function template.
573 MUST_USE_RESULT MaybeHandle<FunctionTemplateInfo> ConfigureInstance(
574 Handle<FunctionTemplateInfo> desc, Handle<JSObject> instance);
576 #define ROOT_ACCESSOR(type, name, camel_name) \
577 inline Handle<type> name() { \
578 return Handle<type>(bit_cast<type**>( \
579 &isolate()->heap()->roots_[Heap::k##camel_name##RootIndex])); \
581 ROOT_LIST(ROOT_ACCESSOR)
584 #define STRUCT_MAP_ACCESSOR(NAME, Name, name) \
585 inline Handle<Map> name##_map() { \
586 return Handle<Map>(bit_cast<Map**>( \
587 &isolate()->heap()->roots_[Heap::k##Name##MapRootIndex])); \
589 STRUCT_LIST(STRUCT_MAP_ACCESSOR)
590 #undef STRUCT_MAP_ACCESSOR
592 #define STRING_ACCESSOR(name, str) \
593 inline Handle<String> name() { \
594 return Handle<String>(bit_cast<String**>( \
595 &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
597 INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
598 #undef STRING_ACCESSOR
600 inline void set_string_table(Handle<StringTable> table) {
601 isolate()->heap()->set_string_table(*table);
604 Handle<String> hidden_string() {
605 return Handle<String>(&isolate()->heap()->hidden_string_);
608 // Allocates a new SharedFunctionInfo object.
609 Handle<SharedFunctionInfo> NewSharedFunctionInfo(
610 Handle<String> name, int number_of_literals, FunctionKind kind,
611 Handle<Code> code, Handle<ScopeInfo> scope_info,
612 Handle<TypeFeedbackVector> feedback_vector);
613 Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name,
614 MaybeHandle<Code> code);
616 // Allocate a new type feedback vector
617 Handle<TypeFeedbackVector> NewTypeFeedbackVector(int slot_count);
619 // Allocates a new JSMessageObject object.
620 Handle<JSMessageObject> NewJSMessageObject(
622 Handle<JSArray> arguments,
625 Handle<Object> script,
626 Handle<Object> stack_frames);
628 Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
630 // Return a map using the map cache in the native context.
631 // The key the an ordered set of property names.
632 Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context,
633 Handle<FixedArray> keys);
635 // Creates a new FixedArray that holds the data associated with the
636 // atom regexp and stores it in the regexp.
637 void SetRegExpAtomData(Handle<JSRegExp> regexp,
639 Handle<String> source,
640 JSRegExp::Flags flags,
641 Handle<Object> match_pattern);
643 // Creates a new FixedArray that holds the data associated with the
644 // irregexp regexp and stores it in the regexp.
645 void SetRegExpIrregexpData(Handle<JSRegExp> regexp,
647 Handle<String> source,
648 JSRegExp::Flags flags,
651 // Returns the value for a known global constant (a property of the global
652 // object which is neither configurable nor writable) like 'undefined'.
653 // Returns a null handle when the given name is unknown.
654 Handle<Object> GlobalConstantFor(Handle<String> name);
656 // Converts the given boolean condition to JavaScript boolean value.
657 Handle<Object> ToBoolean(bool value);
660 Isolate* isolate() { return reinterpret_cast<Isolate*>(this); }
662 // Creates a heap object based on the map. The fields of the heap object are
663 // not initialized by New<>() functions. It's the responsibility of the caller
666 Handle<T> New(Handle<Map> map, AllocationSpace space);
669 Handle<T> New(Handle<Map> map,
670 AllocationSpace space,
671 Handle<AllocationSite> allocation_site);
673 // Creates a code object that is not yet fully initialized yet.
674 inline Handle<Code> NewCodeRaw(int object_size, bool immovable);
676 // Create a new map cache.
677 Handle<MapCache> NewMapCache(int at_least_space_for);
679 // Update the map cache in the native context with (keys, map)
680 Handle<MapCache> AddToMapCache(Handle<Context> context,
681 Handle<FixedArray> keys,
684 // Attempt to find the number in a small cache. If we finds it, return
685 // the string representation of the number. Otherwise return undefined.
686 Handle<Object> GetNumberStringCache(Handle<Object> number);
688 // Update the cache with a new number-string pair.
689 void SetNumberStringCache(Handle<Object> number, Handle<String> string);
691 // Initializes a function with a shared part and prototype.
692 // Note: this code was factored out of NewFunction such that other parts of
693 // the VM could use it. Specifically, a function that creates instances of
694 // type JS_FUNCTION_TYPE benefit from the use of this function.
695 inline void InitializeFunction(Handle<JSFunction> function,
696 Handle<SharedFunctionInfo> info,
697 Handle<Context> context);
699 // Creates a function initialized with a shared part.
700 Handle<JSFunction> NewFunction(Handle<Map> map,
701 Handle<SharedFunctionInfo> info,
702 Handle<Context> context,
703 PretenureFlag pretenure = TENURED);
705 Handle<JSFunction> NewFunction(Handle<Map> map,
707 MaybeHandle<Code> maybe_code);
709 // Reinitialize a JSProxy into an (empty) JS object of respective type and
710 // size, but keeping the original prototype. The receiver must have at least
711 // the size of the new object. The object is reinitialized and behaves as an
712 // object that has been freshly allocated.
713 void ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type, int size);
716 } } // namespace v8::internal
718 #endif // V8_FACTORY_H_