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. 4 5 #ifndef V8_FACTORY_H_ 6 #define V8_FACTORY_H_ 7 8 #include "src/isolate.h" 9 10 namespace v8 { 11 namespace internal { 12 13 // Interface for handle based allocation. 14 15 class Factory FINAL { 16 public: 17 Handle<Oddball> NewOddball(Handle<Map> map, 18 const char* to_string, 19 Handle<Object> to_number, 20 byte kind); 21 22 // Allocates a fixed array initialized with undefined values. 23 Handle<FixedArray> NewFixedArray( 24 int size, 25 PretenureFlag pretenure = NOT_TENURED); 26 27 // Allocate a new fixed array with non-existing entries (the hole). 28 Handle<FixedArray> NewFixedArrayWithHoles( 29 int size, 30 PretenureFlag pretenure = NOT_TENURED); 31 32 // Allocates an uninitialized fixed array. It must be filled by the caller. 33 Handle<FixedArray> NewUninitializedFixedArray(int size); 34 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( 39 int size, 40 PretenureFlag pretenure = NOT_TENURED); 41 42 // Allocate a new fixed double array with hole values. 43 Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles( 44 int size, 45 PretenureFlag pretenure = NOT_TENURED); 46 47 Handle<ConstantPoolArray> NewConstantPoolArray( 48 const ConstantPoolArray::NumberOfEntries& small); 49 50 Handle<ConstantPoolArray> NewExtendedConstantPoolArray( 51 const ConstantPoolArray::NumberOfEntries& small, 52 const ConstantPoolArray::NumberOfEntries& extended); 53 54 Handle<OrderedHashSet> NewOrderedHashSet(); 55 Handle<OrderedHashMap> NewOrderedHashMap(); 56 57 // Create a new boxed value. 58 Handle<Box> NewBox(Handle<Object> value); 59 60 // Create a pre-tenured empty AccessorPair. 61 Handle<AccessorPair> NewAccessorPair(); 62 63 // Create an empty TypeFeedbackInfo. 64 Handle<TypeFeedbackInfo> NewTypeFeedbackInfo(); 65 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)); 71 } 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); 76 77 Handle<String> InternalizeTwoByteString(Vector<const uc16> str); 78 79 template<class StringTableKey> 80 Handle<String> InternalizeStringWithKey(StringTableKey* key); 81 82 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 86 // DONT_TENURE. 87 // 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 91 // initialized from. 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. 101 // 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); 106 107 template <size_t N> 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) 112 .ToHandleChecked(); 113 } 114 115 inline Handle<String> NewStringFromAsciiChecked( 116 const char* str, 117 PretenureFlag pretenure = NOT_TENURED) { 118 return NewStringFromOneByte( 119 OneByteVector(str), pretenure).ToHandleChecked(); 120 } 121 122 123 // 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 136 // two-byte. 137 138 // 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); 143 } 144 145 // 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); 150 151 MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte( 152 Vector<const uc16> str, 153 PretenureFlag pretenure = NOT_TENURED); 154 155 // Allocates an internalized string in old space based on the character 156 // stream. 157 MUST_USE_RESULT Handle<String> NewInternalizedStringFromUtf8( 158 Vector<const char> str, 159 int chars, 160 uint32_t hash_field); 161 162 MUST_USE_RESULT Handle<String> NewOneByteInternalizedString( 163 Vector<const uint8_t> str, uint32_t hash_field); 164 165 MUST_USE_RESULT Handle<String> NewOneByteInternalizedSubString( 166 Handle<SeqOneByteString> string, int offset, int length, 167 uint32_t hash_field); 168 169 MUST_USE_RESULT Handle<String> NewTwoByteInternalizedString( 170 Vector<const uc16> str, 171 uint32_t hash_field); 172 173 MUST_USE_RESULT Handle<String> NewInternalizedStringImpl( 174 Handle<String> string, int chars, uint32_t hash_field); 175 176 // 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); 180 181 // 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( 185 int length, 186 PretenureFlag pretenure = NOT_TENURED); 187 MUST_USE_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString( 188 int length, 189 PretenureFlag pretenure = NOT_TENURED); 190 191 // 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); 194 195 // 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); 198 199 // Create a new string object which holds a proper substring of a string. 200 Handle<String> NewProperSubString(Handle<String> str, 201 int begin, 202 int end); 203 204 // 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); 208 } 209 210 // 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); 219 220 // Create a symbol. 221 Handle<Symbol> NewSymbol(); 222 Handle<Symbol> NewPrivateSymbol(); 223 Handle<Symbol> NewPrivateOwnSymbol(); 224 225 // Create a global (but otherwise uninitialized) context. 226 Handle<Context> NewNativeContext(); 227 228 // Create a global context. 229 Handle<Context> NewGlobalContext(Handle<JSFunction> function, 230 Handle<ScopeInfo> scope_info); 231 232 // Create a module context. 233 Handle<Context> NewModuleContext(Handle<ScopeInfo> scope_info); 234 235 // Create a function context. 236 Handle<Context> NewFunctionContext(int length, Handle<JSFunction> function); 237 238 // Create a catch context. 239 Handle<Context> NewCatchContext(Handle<JSFunction> function, 240 Handle<Context> previous, 241 Handle<String> name, 242 Handle<Object> thrown_object); 243 244 // Create a 'with' context. 245 Handle<Context> NewWithContext(Handle<JSFunction> function, 246 Handle<Context> previous, 247 Handle<JSReceiver> extension); 248 249 // Create a block context. 250 Handle<Context> NewBlockContext(Handle<JSFunction> function, 251 Handle<Context> previous, 252 Handle<ScopeInfo> scope_info); 253 254 // Allocate a new struct. The struct is pretenured (allocated directly in 255 // the old generation). 256 Handle<Struct> NewStruct(InstanceType type); 257 258 Handle<CodeCache> NewCodeCache(); 259 260 Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry( 261 int aliased_context_slot); 262 263 Handle<DeclaredAccessorDescriptor> NewDeclaredAccessorDescriptor(); 264 265 Handle<DeclaredAccessorInfo> NewDeclaredAccessorInfo(); 266 267 Handle<ExecutableAccessorInfo> NewExecutableAccessorInfo(); 268 269 Handle<Script> NewScript(Handle<String> source); 270 271 // Foreign objects are pretenured when allocated by the bootstrapper. 272 Handle<Foreign> NewForeign(Address addr, 273 PretenureFlag pretenure = NOT_TENURED); 274 275 // Allocate a new foreign object. The foreign is pretenured (allocated 276 // directly in the old generation). 277 Handle<Foreign> NewForeign(const AccessorDescriptor* foreign); 278 279 Handle<ByteArray> NewByteArray(int length, 280 PretenureFlag pretenure = NOT_TENURED); 281 282 Handle<ExternalArray> NewExternalArray( 283 int length, 284 ExternalArrayType array_type, 285 void* external_pointer, 286 PretenureFlag pretenure = NOT_TENURED); 287 288 Handle<FixedTypedArrayBase> NewFixedTypedArray( 289 int length, 290 ExternalArrayType array_type, 291 PretenureFlag pretenure = NOT_TENURED); 292 293 Handle<Cell> NewCell(Handle<Object> value); 294 295 Handle<PropertyCell> NewPropertyCellWithHole(); 296 297 Handle<PropertyCell> NewPropertyCell(Handle<Object> value); 298 299 // Allocate a tenured AllocationSite. It's payload is null. 300 Handle<AllocationSite> NewAllocationSite(); 301 302 Handle<Map> NewMap( 303 InstanceType type, 304 int instance_size, 305 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND); 306 307 Handle<HeapObject> NewFillerObject(int size, 308 bool double_align, 309 AllocationSpace space); 310 311 Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function); 312 313 Handle<JSObject> CopyJSObject(Handle<JSObject> object); 314 315 Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object, 316 Handle<AllocationSite> site); 317 318 Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array, 319 Handle<Map> map); 320 321 Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array); 322 323 // 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); 326 327 Handle<FixedDoubleArray> CopyFixedDoubleArray( 328 Handle<FixedDoubleArray> array); 329 330 Handle<ConstantPoolArray> CopyConstantPoolArray( 331 Handle<ConstantPoolArray> array); 332 333 // 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); 337 338 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)), 346 isolate()); 347 } 348 return NewNumber(static_cast<double>(value), pretenure); 349 } 350 Handle<HeapNumber> NewHeapNumber(double value, 351 MutableMode mode = IMMUTABLE, 352 PretenureFlag pretenure = NOT_TENURED); 353 354 // These objects are used by the api to create env-independent data 355 // structures in the heap. 356 inline Handle<JSObject> NewNeanderObject() { 357 return NewJSObjectFromMap(neander_map()); 358 } 359 360 Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length); 361 362 // JS objects are pretenured when allocated by the bootstrapper and 363 // runtime. 364 Handle<JSObject> NewJSObject(Handle<JSFunction> constructor, 365 PretenureFlag pretenure = NOT_TENURED); 366 // JSObject that should have a memento pointing to the allocation site. 367 Handle<JSObject> NewJSObjectWithMemento(Handle<JSFunction> constructor, 368 Handle<AllocationSite> site); 369 370 // Global objects are pretenured and initialized based on a constructor. 371 Handle<GlobalObject> NewGlobalObject(Handle<JSFunction> constructor); 372 373 // JS objects are pretenured when allocated by the bootstrapper and 374 // runtime. 375 Handle<JSObject> NewJSObjectFromMap( 376 Handle<Map> map, 377 PretenureFlag pretenure = NOT_TENURED, 378 bool allocate_properties = true, 379 Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null()); 380 381 // JS modules are pretenured. 382 Handle<JSModule> NewJSModule(Handle<Context> context, 383 Handle<ScopeInfo> scope_info); 384 385 // JS arrays are pretenured when allocated by the parser. 386 387 // Create a JSArray with no elements. 388 Handle<JSArray> NewJSArray( 389 ElementsKind elements_kind, 390 PretenureFlag pretenure = NOT_TENURED); 391 392 // Create a JSArray with a specified length and elements initialized 393 // according to the specified mode. 394 Handle<JSArray> NewJSArray( 395 ElementsKind elements_kind, int length, int capacity, 396 ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS, 397 PretenureFlag pretenure = NOT_TENURED); 398 399 Handle<JSArray> NewJSArray( 400 int capacity, 401 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND, 402 PretenureFlag pretenure = NOT_TENURED) { 403 if (capacity != 0) { 404 elements_kind = GetHoleyElementsKind(elements_kind); 405 } 406 return NewJSArray(elements_kind, 0, capacity, 407 INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure); 408 } 409 410 // Create a JSArray with the given elements. 411 Handle<JSArray> NewJSArrayWithElements( 412 Handle<FixedArrayBase> elements, 413 ElementsKind elements_kind, 414 int length, 415 PretenureFlag pretenure = NOT_TENURED); 416 417 Handle<JSArray> NewJSArrayWithElements( 418 Handle<FixedArrayBase> elements, 419 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND, 420 PretenureFlag pretenure = NOT_TENURED) { 421 return NewJSArrayWithElements( 422 elements, elements_kind, elements->length(), pretenure); 423 } 424 425 void NewJSArrayStorage( 426 Handle<JSArray> array, 427 int length, 428 int capacity, 429 ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS); 430 431 Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function); 432 433 Handle<JSArrayBuffer> NewJSArrayBuffer(); 434 435 Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type); 436 437 Handle<JSDataView> NewJSDataView(); 438 439 // Allocates a Harmony proxy. 440 Handle<JSProxy> NewJSProxy(Handle<Object> handler, Handle<Object> prototype); 441 442 // Allocates a Harmony function proxy. 443 Handle<JSProxy> NewJSFunctionProxy(Handle<Object> handler, 444 Handle<Object> call_trap, 445 Handle<Object> construct_trap, 446 Handle<Object> prototype); 447 448 // Reinitialize an JSGlobalProxy based on a constructor. The object 449 // must have the same size as objects allocated using the 450 // constructor. The object is reinitialized and behaves as an 451 // object that has been freshly allocated using the constructor. 452 void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global, 453 Handle<JSFunction> constructor); 454 455 // Change the type of the argument into a JS object/function and reinitialize. 456 void BecomeJSObject(Handle<JSProxy> object); 457 void BecomeJSFunction(Handle<JSProxy> object); 458 459 Handle<JSFunction> NewFunction(Handle<String> name, 460 Handle<Code> code, 461 Handle<Object> prototype, 462 bool read_only_prototype = false); 463 Handle<JSFunction> NewFunction(Handle<String> name); 464 Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name, 465 Handle<Code> code); 466 467 Handle<JSFunction> NewFunctionFromSharedFunctionInfo( 468 Handle<SharedFunctionInfo> function_info, 469 Handle<Context> context, 470 PretenureFlag pretenure = TENURED); 471 472 Handle<JSFunction> NewFunction(Handle<String> name, 473 Handle<Code> code, 474 Handle<Object> prototype, 475 InstanceType type, 476 int instance_size, 477 bool read_only_prototype = false); 478 Handle<JSFunction> NewFunction(Handle<String> name, 479 Handle<Code> code, 480 InstanceType type, 481 int instance_size); 482 483 // Create a serialized scope info. 484 Handle<ScopeInfo> NewScopeInfo(int length); 485 486 // Create an External object for V8's external API. 487 Handle<JSObject> NewExternal(void* value); 488 489 // The reference to the Code object is stored in self_reference. 490 // This allows generated code to reference its own Code object 491 // by containing this handle. 492 Handle<Code> NewCode(const CodeDesc& desc, 493 Code::Flags flags, 494 Handle<Object> self_reference, 495 bool immovable = false, 496 bool crankshafted = false, 497 int prologue_offset = Code::kPrologueOffsetNotSet, 498 bool is_debug = false); 499 500 Handle<Code> CopyCode(Handle<Code> code); 501 502 Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info); 503 504 // Interface for creating error objects. 505 506 MaybeHandle<Object> NewError(const char* maker, const char* message, 507 Handle<JSArray> args); 508 Handle<String> EmergencyNewError(const char* message, Handle<JSArray> args); 509 MaybeHandle<Object> NewError(const char* maker, const char* message, 510 Vector<Handle<Object> > args); 511 MaybeHandle<Object> NewError(const char* message, 512 Vector<Handle<Object> > args); 513 MaybeHandle<Object> NewError(Handle<String> message); 514 MaybeHandle<Object> NewError(const char* constructor, Handle<String> message); 515 516 MaybeHandle<Object> NewTypeError(const char* message, 517 Vector<Handle<Object> > args); 518 MaybeHandle<Object> NewTypeError(Handle<String> message); 519 520 MaybeHandle<Object> NewRangeError(const char* message, 521 Vector<Handle<Object> > args); 522 MaybeHandle<Object> NewRangeError(Handle<String> message); 523 524 MaybeHandle<Object> NewInvalidStringLengthError() { 525 return NewRangeError("invalid_string_length", 526 HandleVector<Object>(NULL, 0)); 527 } 528 529 MaybeHandle<Object> NewSyntaxError(const char* message, Handle<JSArray> args); 530 MaybeHandle<Object> NewSyntaxError(Handle<String> message); 531 532 MaybeHandle<Object> NewReferenceError(const char* message, 533 Vector<Handle<Object> > args); 534 MaybeHandle<Object> NewReferenceError(const char* message, 535 Handle<JSArray> args); 536 MaybeHandle<Object> NewReferenceError(Handle<String> message); 537 538 MaybeHandle<Object> NewEvalError(const char* message, 539 Vector<Handle<Object> > args); 540 541 Handle<String> NumberToString(Handle<Object> number, 542 bool check_number_string_cache = true); 543 544 Handle<String> Uint32ToString(uint32_t value) { 545 return NumberToString(NewNumberFromUint(value)); 546 } 547 548 enum ApiInstanceType { 549 JavaScriptObjectType, 550 GlobalObjectType, 551 GlobalProxyType 552 }; 553 554 Handle<JSFunction> CreateApiFunction( 555 Handle<FunctionTemplateInfo> data, 556 Handle<Object> prototype, 557 ApiInstanceType type = JavaScriptObjectType); 558 559 Handle<JSFunction> InstallMembers(Handle<JSFunction> function); 560 561 // Installs interceptors on the instance. 'desc' is a function template, 562 // and instance is an object instance created by the function of this 563 // function template. 564 MUST_USE_RESULT MaybeHandle<FunctionTemplateInfo> ConfigureInstance( 565 Handle<FunctionTemplateInfo> desc, Handle<JSObject> instance); 566 567 #define ROOT_ACCESSOR(type, name, camel_name) \ 568 inline Handle<type> name() { \ 569 return Handle<type>(bit_cast<type**>( \ 570 &isolate()->heap()->roots_[Heap::k##camel_name##RootIndex])); \ 571 } 572 ROOT_LIST(ROOT_ACCESSOR) 573 #undef ROOT_ACCESSOR 574 575 #define STRUCT_MAP_ACCESSOR(NAME, Name, name) \ 576 inline Handle<Map> name##_map() { \ 577 return Handle<Map>(bit_cast<Map**>( \ 578 &isolate()->heap()->roots_[Heap::k##Name##MapRootIndex])); \ 579 } 580 STRUCT_LIST(STRUCT_MAP_ACCESSOR) 581 #undef STRUCT_MAP_ACCESSOR 582 583 #define STRING_ACCESSOR(name, str) \ 584 inline Handle<String> name() { \ 585 return Handle<String>(bit_cast<String**>( \ 586 &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \ 587 } 588 INTERNALIZED_STRING_LIST(STRING_ACCESSOR) 589 #undef STRING_ACCESSOR 590 591 inline void set_string_table(Handle<StringTable> table) { 592 isolate()->heap()->set_string_table(*table); 593 } 594 595 Handle<String> hidden_string() { 596 return Handle<String>(&isolate()->heap()->hidden_string_); 597 } 598 599 // Allocates a new SharedFunctionInfo object. 600 Handle<SharedFunctionInfo> NewSharedFunctionInfo( 601 Handle<String> name, int number_of_literals, FunctionKind kind, 602 Handle<Code> code, Handle<ScopeInfo> scope_info, 603 Handle<TypeFeedbackVector> feedback_vector); 604 Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name, 605 MaybeHandle<Code> code); 606 607 // Allocate a new type feedback vector 608 Handle<TypeFeedbackVector> NewTypeFeedbackVector(int slot_count); 609 610 // Allocates a new JSMessageObject object. 611 Handle<JSMessageObject> NewJSMessageObject( 612 Handle<String> type, 613 Handle<JSArray> arguments, 614 int start_position, 615 int end_position, 616 Handle<Object> script, 617 Handle<Object> stack_frames); 618 619 Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared); 620 621 // Return a map using the map cache in the native context. 622 // The key the an ordered set of property names. 623 Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context, 624 Handle<FixedArray> keys); 625 626 // Creates a new FixedArray that holds the data associated with the 627 // atom regexp and stores it in the regexp. 628 void SetRegExpAtomData(Handle<JSRegExp> regexp, 629 JSRegExp::Type type, 630 Handle<String> source, 631 JSRegExp::Flags flags, 632 Handle<Object> match_pattern); 633 634 // Creates a new FixedArray that holds the data associated with the 635 // irregexp regexp and stores it in the regexp. 636 void SetRegExpIrregexpData(Handle<JSRegExp> regexp, 637 JSRegExp::Type type, 638 Handle<String> source, 639 JSRegExp::Flags flags, 640 int capture_count); 641 642 // Returns the value for a known global constant (a property of the global 643 // object which is neither configurable nor writable) like 'undefined'. 644 // Returns a null handle when the given name is unknown. 645 Handle<Object> GlobalConstantFor(Handle<String> name); 646 647 // Converts the given boolean condition to JavaScript boolean value. 648 Handle<Object> ToBoolean(bool value); 649 650 private: 651 Isolate* isolate() { return reinterpret_cast<Isolate*>(this); } 652 653 // Creates a heap object based on the map. The fields of the heap object are 654 // not initialized by New<>() functions. It's the responsibility of the caller 655 // to do that. 656 template<typename T> 657 Handle<T> New(Handle<Map> map, AllocationSpace space); 658 659 template<typename T> 660 Handle<T> New(Handle<Map> map, 661 AllocationSpace space, 662 Handle<AllocationSite> allocation_site); 663 664 // Creates a code object that is not yet fully initialized yet. 665 inline Handle<Code> NewCodeRaw(int object_size, bool immovable); 666 667 // Create a new map cache. 668 Handle<MapCache> NewMapCache(int at_least_space_for); 669 670 // Update the map cache in the native context with (keys, map) 671 Handle<MapCache> AddToMapCache(Handle<Context> context, 672 Handle<FixedArray> keys, 673 Handle<Map> map); 674 675 // Attempt to find the number in a small cache. If we finds it, return 676 // the string representation of the number. Otherwise return undefined. 677 Handle<Object> GetNumberStringCache(Handle<Object> number); 678 679 // Update the cache with a new number-string pair. 680 void SetNumberStringCache(Handle<Object> number, Handle<String> string); 681 682 // Initializes a function with a shared part and prototype. 683 // Note: this code was factored out of NewFunction such that other parts of 684 // the VM could use it. Specifically, a function that creates instances of 685 // type JS_FUNCTION_TYPE benefit from the use of this function. 686 inline void InitializeFunction(Handle<JSFunction> function, 687 Handle<SharedFunctionInfo> info, 688 Handle<Context> context); 689 690 // Creates a function initialized with a shared part. 691 Handle<JSFunction> NewFunction(Handle<Map> map, 692 Handle<SharedFunctionInfo> info, 693 Handle<Context> context, 694 PretenureFlag pretenure = TENURED); 695 696 Handle<JSFunction> NewFunction(Handle<Map> map, 697 Handle<String> name, 698 MaybeHandle<Code> maybe_code); 699 700 // Reinitialize a JSProxy into an (empty) JS object of respective type and 701 // size, but keeping the original prototype. The receiver must have at least 702 // the size of the new object. The object is reinitialized and behaves as an 703 // object that has been freshly allocated. 704 void ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type, int size); 705 }; 706 707 } } // namespace v8::internal 708 709 #endif // V8_FACTORY_H_ 710
