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 #include "src/messages.h" 10 #include "src/type-feedback-vector.h" 11 12 namespace v8 { 13 namespace internal { 14 15 // Interface for handle based allocation. 16 class Factory final { 17 public: 18 Handle<Oddball> NewOddball(Handle<Map> map, const char* to_string, 19 Handle<Object> to_number, bool to_boolean, 20 const char* type_of, 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<OrderedHashSet> NewOrderedHashSet(); 48 Handle<OrderedHashMap> NewOrderedHashMap(); 49 50 // Create a new boxed value. 51 Handle<Box> NewBox(Handle<Object> value); 52 53 // Create a new PrototypeInfo struct. 54 Handle<PrototypeInfo> NewPrototypeInfo(); 55 56 // Create a new SloppyBlockWithEvalContextExtension struct. 57 Handle<SloppyBlockWithEvalContextExtension> 58 NewSloppyBlockWithEvalContextExtension(Handle<ScopeInfo> scope_info, 59 Handle<JSObject> extension); 60 61 // Create a pre-tenured empty AccessorPair. 62 Handle<AccessorPair> NewAccessorPair(); 63 64 // Create an empty TypeFeedbackInfo. 65 Handle<TypeFeedbackInfo> NewTypeFeedbackInfo(); 66 67 // Finds the internalized copy for string in the string table. 68 // If not found, a new string is added to the table and returned. 69 Handle<String> InternalizeUtf8String(Vector<const char> str); 70 Handle<String> InternalizeUtf8String(const char* str) { 71 return InternalizeUtf8String(CStrVector(str)); 72 } 73 74 Handle<String> InternalizeOneByteString(Vector<const uint8_t> str); 75 Handle<String> InternalizeOneByteString( 76 Handle<SeqOneByteString>, int from, int length); 77 78 Handle<String> InternalizeTwoByteString(Vector<const uc16> str); 79 80 template<class StringTableKey> 81 Handle<String> InternalizeStringWithKey(StringTableKey* key); 82 83 // Internalized strings are created in the old generation (data space). 84 Handle<String> InternalizeString(Handle<String> string) { 85 if (string->IsInternalizedString()) return string; 86 return StringTable::LookupString(isolate(), string); 87 } 88 89 Handle<Name> InternalizeName(Handle<Name> name) { 90 if (name->IsUniqueName()) return name; 91 return StringTable::LookupString(isolate(), Handle<String>::cast(name)); 92 } 93 94 // String creation functions. Most of the string creation functions take 95 // a Heap::PretenureFlag argument to optionally request that they be 96 // allocated in the old generation. The pretenure flag defaults to 97 // DONT_TENURE. 98 // 99 // Creates a new String object. There are two String encodings: one-byte and 100 // two-byte. One should choose between the three string factory functions 101 // based on the encoding of the string buffer that the string is 102 // initialized from. 103 // - ...FromOneByte initializes the string from a buffer that is Latin1 104 // encoded (it does not check that the buffer is Latin1 encoded) and 105 // the result will be Latin1 encoded. 106 // - ...FromUtf8 initializes the string from a buffer that is UTF-8 107 // encoded. If the characters are all ASCII characters, the result 108 // will be Latin1 encoded, otherwise it will converted to two-byte. 109 // - ...FromTwoByte initializes the string from a buffer that is two-byte 110 // encoded. If the characters are all Latin1 characters, the result 111 // will be converted to Latin1, otherwise it will be left as two-byte. 112 // 113 // One-byte strings are pretenured when used as keys in the SourceCodeCache. 114 MUST_USE_RESULT MaybeHandle<String> NewStringFromOneByte( 115 Vector<const uint8_t> str, 116 PretenureFlag pretenure = NOT_TENURED); 117 118 template <size_t N> 119 inline Handle<String> NewStringFromStaticChars( 120 const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) { 121 DCHECK(N == StrLength(str) + 1); 122 return NewStringFromOneByte(STATIC_CHAR_VECTOR(str), pretenure) 123 .ToHandleChecked(); 124 } 125 126 inline Handle<String> NewStringFromAsciiChecked( 127 const char* str, 128 PretenureFlag pretenure = NOT_TENURED) { 129 return NewStringFromOneByte( 130 OneByteVector(str), pretenure).ToHandleChecked(); 131 } 132 133 134 // Allocates and fully initializes a String. There are two String encodings: 135 // one-byte and two-byte. One should choose between the threestring 136 // allocation functions based on the encoding of the string buffer used to 137 // initialized the string. 138 // - ...FromOneByte initializes the string from a buffer that is Latin1 139 // encoded (it does not check that the buffer is Latin1 encoded) and the 140 // result will be Latin1 encoded. 141 // - ...FromUTF8 initializes the string from a buffer that is UTF-8 142 // encoded. If the characters are all ASCII characters, the result 143 // will be Latin1 encoded, otherwise it will converted to two-byte. 144 // - ...FromTwoByte initializes the string from a buffer that is two-byte 145 // encoded. If the characters are all Latin1 characters, the 146 // result will be converted to Latin1, otherwise it will be left as 147 // two-byte. 148 149 // TODO(dcarney): remove this function. 150 MUST_USE_RESULT inline MaybeHandle<String> NewStringFromAscii( 151 Vector<const char> str, 152 PretenureFlag pretenure = NOT_TENURED) { 153 return NewStringFromOneByte(Vector<const uint8_t>::cast(str), pretenure); 154 } 155 156 // UTF8 strings are pretenured when used for regexp literal patterns and 157 // flags in the parser. 158 MUST_USE_RESULT MaybeHandle<String> NewStringFromUtf8( 159 Vector<const char> str, 160 PretenureFlag pretenure = NOT_TENURED); 161 162 MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte( 163 Vector<const uc16> str, 164 PretenureFlag pretenure = NOT_TENURED); 165 166 MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte( 167 const ZoneVector<uc16>* str, PretenureFlag pretenure = NOT_TENURED); 168 169 // Allocates an internalized string in old space based on the character 170 // stream. 171 Handle<String> NewInternalizedStringFromUtf8(Vector<const char> str, 172 int chars, uint32_t hash_field); 173 174 Handle<String> NewOneByteInternalizedString(Vector<const uint8_t> str, 175 uint32_t hash_field); 176 177 Handle<String> NewOneByteInternalizedSubString( 178 Handle<SeqOneByteString> string, int offset, int length, 179 uint32_t hash_field); 180 181 Handle<String> NewTwoByteInternalizedString(Vector<const uc16> str, 182 uint32_t hash_field); 183 184 Handle<String> NewInternalizedStringImpl(Handle<String> string, int chars, 185 uint32_t hash_field); 186 187 // Compute the matching internalized string map for a string if possible. 188 // Empty handle is returned if string is in new space or not flattened. 189 MUST_USE_RESULT MaybeHandle<Map> InternalizedStringMapForString( 190 Handle<String> string); 191 192 // Allocates and partially initializes an one-byte or two-byte String. The 193 // characters of the string are uninitialized. Currently used in regexp code 194 // only, where they are pretenured. 195 MUST_USE_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString( 196 int length, 197 PretenureFlag pretenure = NOT_TENURED); 198 MUST_USE_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString( 199 int length, 200 PretenureFlag pretenure = NOT_TENURED); 201 202 // Creates a single character string where the character has given code. 203 // A cache is used for Latin1 codes. 204 Handle<String> LookupSingleCharacterStringFromCode(uint32_t code); 205 206 // Create a new cons string object which consists of a pair of strings. 207 MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left, 208 Handle<String> right); 209 210 // Create a new string object which holds a proper substring of a string. 211 Handle<String> NewProperSubString(Handle<String> str, 212 int begin, 213 int end); 214 215 // Create a new string object which holds a substring of a string. 216 Handle<String> NewSubString(Handle<String> str, int begin, int end) { 217 if (begin == 0 && end == str->length()) return str; 218 return NewProperSubString(str, begin, end); 219 } 220 221 // Creates a new external String object. There are two String encodings 222 // in the system: one-byte and two-byte. Unlike other String types, it does 223 // not make sense to have a UTF-8 factory function for external strings, 224 // because we cannot change the underlying buffer. Note that these strings 225 // are backed by a string resource that resides outside the V8 heap. 226 MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromOneByte( 227 const ExternalOneByteString::Resource* resource); 228 MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromTwoByte( 229 const ExternalTwoByteString::Resource* resource); 230 // Create a new external string object for one-byte encoded native script. 231 // It does not cache the resource data pointer. 232 Handle<ExternalOneByteString> NewNativeSourceString( 233 const ExternalOneByteString::Resource* resource); 234 235 // Create a symbol. 236 Handle<Symbol> NewSymbol(); 237 Handle<Symbol> NewPrivateSymbol(); 238 239 // Create a global (but otherwise uninitialized) context. 240 Handle<Context> NewNativeContext(); 241 242 // Create a script context. 243 Handle<Context> NewScriptContext(Handle<JSFunction> function, 244 Handle<ScopeInfo> scope_info); 245 246 // Create an empty script context table. 247 Handle<ScriptContextTable> NewScriptContextTable(); 248 249 // Create a module context. 250 Handle<Context> NewModuleContext(Handle<ScopeInfo> scope_info); 251 252 // Create a function context. 253 Handle<Context> NewFunctionContext(int length, Handle<JSFunction> function); 254 255 // Create a catch context. 256 Handle<Context> NewCatchContext(Handle<JSFunction> function, 257 Handle<Context> previous, 258 Handle<String> name, 259 Handle<Object> thrown_object); 260 261 // Create a 'with' context. 262 Handle<Context> NewWithContext(Handle<JSFunction> function, 263 Handle<Context> previous, 264 Handle<JSReceiver> extension); 265 266 Handle<Context> NewDebugEvaluateContext(Handle<Context> previous, 267 Handle<JSReceiver> extension, 268 Handle<Context> wrapped, 269 Handle<StringSet> whitelist); 270 271 // Create a block context. 272 Handle<Context> NewBlockContext(Handle<JSFunction> function, 273 Handle<Context> previous, 274 Handle<ScopeInfo> scope_info); 275 276 // Allocate a new struct. The struct is pretenured (allocated directly in 277 // the old generation). 278 Handle<Struct> NewStruct(InstanceType type); 279 280 Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry( 281 int aliased_context_slot); 282 283 Handle<AccessorInfo> NewAccessorInfo(); 284 285 Handle<Script> NewScript(Handle<String> source); 286 287 // Foreign objects are pretenured when allocated by the bootstrapper. 288 Handle<Foreign> NewForeign(Address addr, 289 PretenureFlag pretenure = NOT_TENURED); 290 291 // Allocate a new foreign object. The foreign is pretenured (allocated 292 // directly in the old generation). 293 Handle<Foreign> NewForeign(const AccessorDescriptor* foreign); 294 295 Handle<ByteArray> NewByteArray(int length, 296 PretenureFlag pretenure = NOT_TENURED); 297 298 Handle<BytecodeArray> NewBytecodeArray(int length, const byte* raw_bytecodes, 299 int frame_size, int parameter_count, 300 Handle<FixedArray> constant_pool); 301 302 Handle<FixedTypedArrayBase> NewFixedTypedArrayWithExternalPointer( 303 int length, ExternalArrayType array_type, void* external_pointer, 304 PretenureFlag pretenure = NOT_TENURED); 305 306 Handle<FixedTypedArrayBase> NewFixedTypedArray( 307 int length, ExternalArrayType array_type, bool initialize, 308 PretenureFlag pretenure = NOT_TENURED); 309 310 Handle<Cell> NewCell(Handle<Object> value); 311 312 Handle<PropertyCell> NewPropertyCell(); 313 314 Handle<WeakCell> NewWeakCell(Handle<HeapObject> value); 315 316 Handle<TransitionArray> NewTransitionArray(int capacity); 317 318 // Allocate a tenured AllocationSite. It's payload is null. 319 Handle<AllocationSite> NewAllocationSite(); 320 321 Handle<Map> NewMap( 322 InstanceType type, 323 int instance_size, 324 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND); 325 326 Handle<HeapObject> NewFillerObject(int size, 327 bool double_align, 328 AllocationSpace space); 329 330 Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function); 331 332 Handle<JSObject> CopyJSObject(Handle<JSObject> object); 333 334 Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object, 335 Handle<AllocationSite> site); 336 337 Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array, 338 Handle<Map> map); 339 340 Handle<FixedArray> CopyFixedArrayAndGrow( 341 Handle<FixedArray> array, int grow_by, 342 PretenureFlag pretenure = NOT_TENURED); 343 344 Handle<FixedArray> CopyFixedArrayUpTo(Handle<FixedArray> array, int new_len, 345 PretenureFlag pretenure = NOT_TENURED); 346 347 Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array); 348 349 // This method expects a COW array in new space, and creates a copy 350 // of it in old space. 351 Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array); 352 353 Handle<FixedDoubleArray> CopyFixedDoubleArray( 354 Handle<FixedDoubleArray> array); 355 356 // Numbers (e.g. literals) are pretenured by the parser. 357 // The return value may be a smi or a heap number. 358 Handle<Object> NewNumber(double value, 359 PretenureFlag pretenure = NOT_TENURED); 360 361 Handle<Object> NewNumberFromInt(int32_t value, 362 PretenureFlag pretenure = NOT_TENURED); 363 Handle<Object> NewNumberFromUint(uint32_t value, 364 PretenureFlag pretenure = NOT_TENURED); 365 Handle<Object> NewNumberFromSize(size_t value, 366 PretenureFlag pretenure = NOT_TENURED) { 367 // We can't use Smi::IsValid() here because that operates on a signed 368 // intptr_t, and casting from size_t could create a bogus sign bit. 369 if (value <= static_cast<size_t>(Smi::kMaxValue)) { 370 return Handle<Object>(Smi::FromIntptr(static_cast<intptr_t>(value)), 371 isolate()); 372 } 373 return NewNumber(static_cast<double>(value), pretenure); 374 } 375 Handle<HeapNumber> NewHeapNumber(double value, 376 MutableMode mode = IMMUTABLE, 377 PretenureFlag pretenure = NOT_TENURED); 378 379 #define SIMD128_NEW_DECL(TYPE, Type, type, lane_count, lane_type) \ 380 Handle<Type> New##Type(lane_type lanes[lane_count], \ 381 PretenureFlag pretenure = NOT_TENURED); 382 SIMD128_TYPES(SIMD128_NEW_DECL) 383 #undef SIMD128_NEW_DECL 384 385 // These objects are used by the api to create env-independent data 386 // structures in the heap. 387 inline Handle<JSObject> NewNeanderObject() { 388 return NewJSObjectFromMap(neander_map()); 389 } 390 391 Handle<JSWeakMap> NewJSWeakMap(); 392 393 Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length); 394 395 // JS objects are pretenured when allocated by the bootstrapper and 396 // runtime. 397 Handle<JSObject> NewJSObject(Handle<JSFunction> constructor, 398 PretenureFlag pretenure = NOT_TENURED); 399 // JSObject that should have a memento pointing to the allocation site. 400 Handle<JSObject> NewJSObjectWithMemento(Handle<JSFunction> constructor, 401 Handle<AllocationSite> site); 402 // JSObject without a prototype. 403 Handle<JSObject> NewJSObjectWithNullProto(); 404 405 // Global objects are pretenured and initialized based on a constructor. 406 Handle<JSGlobalObject> NewJSGlobalObject(Handle<JSFunction> constructor); 407 408 // JS objects are pretenured when allocated by the bootstrapper and 409 // runtime. 410 Handle<JSObject> NewJSObjectFromMap( 411 Handle<Map> map, 412 PretenureFlag pretenure = NOT_TENURED, 413 Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null()); 414 415 // JS modules are pretenured. 416 Handle<JSModule> NewJSModule(Handle<Context> context, 417 Handle<ScopeInfo> scope_info); 418 419 // JS arrays are pretenured when allocated by the parser. 420 421 // Create a JSArray with a specified length and elements initialized 422 // according to the specified mode. 423 Handle<JSArray> NewJSArray( 424 ElementsKind elements_kind, int length, int capacity, 425 ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS, 426 PretenureFlag pretenure = NOT_TENURED); 427 428 Handle<JSArray> NewJSArray( 429 int capacity, ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND, 430 PretenureFlag pretenure = NOT_TENURED) { 431 if (capacity != 0) { 432 elements_kind = GetHoleyElementsKind(elements_kind); 433 } 434 return NewJSArray(elements_kind, 0, capacity, 435 INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure); 436 } 437 438 // Create a JSArray with the given elements. 439 Handle<JSArray> NewJSArrayWithElements(Handle<FixedArrayBase> elements, 440 ElementsKind elements_kind, int length, 441 PretenureFlag pretenure = NOT_TENURED); 442 443 Handle<JSArray> NewJSArrayWithElements( 444 Handle<FixedArrayBase> elements, 445 ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND, 446 PretenureFlag pretenure = NOT_TENURED) { 447 return NewJSArrayWithElements(elements, elements_kind, elements->length(), 448 pretenure); 449 } 450 451 void NewJSArrayStorage( 452 Handle<JSArray> array, 453 int length, 454 int capacity, 455 ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS); 456 457 Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function); 458 459 Handle<JSArrayBuffer> NewJSArrayBuffer( 460 SharedFlag shared = SharedFlag::kNotShared, 461 PretenureFlag pretenure = NOT_TENURED); 462 463 Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type, 464 PretenureFlag pretenure = NOT_TENURED); 465 466 Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind, 467 PretenureFlag pretenure = NOT_TENURED); 468 469 // Creates a new JSTypedArray with the specified buffer. 470 Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type, 471 Handle<JSArrayBuffer> buffer, 472 size_t byte_offset, size_t length, 473 PretenureFlag pretenure = NOT_TENURED); 474 475 // Creates a new on-heap JSTypedArray. 476 Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind, 477 size_t number_of_elements, 478 PretenureFlag pretenure = NOT_TENURED); 479 480 Handle<JSDataView> NewJSDataView(); 481 Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer, 482 size_t byte_offset, size_t byte_length); 483 484 Handle<JSMap> NewJSMap(); 485 Handle<JSSet> NewJSSet(); 486 487 // TODO(aandrey): Maybe these should take table, index and kind arguments. 488 Handle<JSMapIterator> NewJSMapIterator(); 489 Handle<JSSetIterator> NewJSSetIterator(); 490 491 // Allocates a bound function. 492 MaybeHandle<JSBoundFunction> NewJSBoundFunction( 493 Handle<JSReceiver> target_function, Handle<Object> bound_this, 494 Vector<Handle<Object>> bound_args); 495 496 // Allocates a Harmony proxy. 497 Handle<JSProxy> NewJSProxy(Handle<JSReceiver> target, 498 Handle<JSReceiver> handler); 499 500 // Reinitialize an JSGlobalProxy based on a constructor. The object 501 // must have the same size as objects allocated using the 502 // constructor. The object is reinitialized and behaves as an 503 // object that has been freshly allocated using the constructor. 504 void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global, 505 Handle<JSFunction> constructor); 506 507 Handle<JSGlobalProxy> NewUninitializedJSGlobalProxy(); 508 509 Handle<JSFunction> NewFunction(Handle<String> name, Handle<Code> code, 510 Handle<Object> prototype, 511 bool is_strict = false); 512 Handle<JSFunction> NewFunction(Handle<String> name); 513 Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name, 514 Handle<Code> code, 515 bool is_strict = false); 516 517 Handle<JSFunction> NewFunctionFromSharedFunctionInfo( 518 Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info, 519 Handle<Context> context, PretenureFlag pretenure = TENURED); 520 521 Handle<JSFunction> NewFunctionFromSharedFunctionInfo( 522 Handle<SharedFunctionInfo> function_info, Handle<Context> context, 523 PretenureFlag pretenure = TENURED); 524 525 Handle<JSFunction> NewFunction(Handle<String> name, Handle<Code> code, 526 Handle<Object> prototype, InstanceType type, 527 int instance_size, 528 bool is_strict = false); 529 Handle<JSFunction> NewFunction(Handle<String> name, 530 Handle<Code> code, 531 InstanceType type, 532 int instance_size); 533 Handle<JSFunction> NewFunction(Handle<Map> map, Handle<String> name, 534 MaybeHandle<Code> maybe_code); 535 536 // Create a serialized scope info. 537 Handle<ScopeInfo> NewScopeInfo(int length); 538 539 // Create an External object for V8's external API. 540 Handle<JSObject> NewExternal(void* value); 541 542 // The reference to the Code object is stored in self_reference. 543 // This allows generated code to reference its own Code object 544 // by containing this handle. 545 Handle<Code> NewCode(const CodeDesc& desc, 546 Code::Flags flags, 547 Handle<Object> self_reference, 548 bool immovable = false, 549 bool crankshafted = false, 550 int prologue_offset = Code::kPrologueOffsetNotSet, 551 bool is_debug = false); 552 553 Handle<Code> CopyCode(Handle<Code> code); 554 555 Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info); 556 557 Handle<BytecodeArray> CopyBytecodeArray(Handle<BytecodeArray>); 558 559 // Interface for creating error objects. 560 Handle<Object> NewError(Handle<JSFunction> constructor, 561 Handle<String> message); 562 563 Handle<Object> NewInvalidStringLengthError() { 564 return NewRangeError(MessageTemplate::kInvalidStringLength); 565 } 566 567 Handle<Object> NewURIError() { 568 return NewError(isolate()->uri_error_function(), 569 MessageTemplate::kURIMalformed); 570 } 571 572 Handle<Object> NewError(Handle<JSFunction> constructor, 573 MessageTemplate::Template template_index, 574 Handle<Object> arg0 = Handle<Object>(), 575 Handle<Object> arg1 = Handle<Object>(), 576 Handle<Object> arg2 = Handle<Object>()); 577 578 #define DECLARE_ERROR(NAME) \ 579 Handle<Object> New##NAME(MessageTemplate::Template template_index, \ 580 Handle<Object> arg0 = Handle<Object>(), \ 581 Handle<Object> arg1 = Handle<Object>(), \ 582 Handle<Object> arg2 = Handle<Object>()); 583 DECLARE_ERROR(Error) 584 DECLARE_ERROR(EvalError) 585 DECLARE_ERROR(RangeError) 586 DECLARE_ERROR(ReferenceError) 587 DECLARE_ERROR(SyntaxError) 588 DECLARE_ERROR(TypeError) 589 #undef DEFINE_ERROR 590 591 Handle<String> NumberToString(Handle<Object> number, 592 bool check_number_string_cache = true); 593 594 Handle<String> Uint32ToString(uint32_t value) { 595 return NumberToString(NewNumberFromUint(value)); 596 } 597 598 Handle<JSFunction> InstallMembers(Handle<JSFunction> function); 599 600 #define ROOT_ACCESSOR(type, name, camel_name) \ 601 inline Handle<type> name() { \ 602 return Handle<type>(bit_cast<type**>( \ 603 &isolate()->heap()->roots_[Heap::k##camel_name##RootIndex])); \ 604 } 605 ROOT_LIST(ROOT_ACCESSOR) 606 #undef ROOT_ACCESSOR 607 608 #define STRUCT_MAP_ACCESSOR(NAME, Name, name) \ 609 inline Handle<Map> name##_map() { \ 610 return Handle<Map>(bit_cast<Map**>( \ 611 &isolate()->heap()->roots_[Heap::k##Name##MapRootIndex])); \ 612 } 613 STRUCT_LIST(STRUCT_MAP_ACCESSOR) 614 #undef STRUCT_MAP_ACCESSOR 615 616 #define STRING_ACCESSOR(name, str) \ 617 inline Handle<String> name() { \ 618 return Handle<String>(bit_cast<String**>( \ 619 &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \ 620 } 621 INTERNALIZED_STRING_LIST(STRING_ACCESSOR) 622 #undef STRING_ACCESSOR 623 624 #define SYMBOL_ACCESSOR(name) \ 625 inline Handle<Symbol> name() { \ 626 return Handle<Symbol>(bit_cast<Symbol**>( \ 627 &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \ 628 } 629 PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR) 630 #undef SYMBOL_ACCESSOR 631 632 #define SYMBOL_ACCESSOR(name, description) \ 633 inline Handle<Symbol> name() { \ 634 return Handle<Symbol>(bit_cast<Symbol**>( \ 635 &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \ 636 } 637 PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR) 638 WELL_KNOWN_SYMBOL_LIST(SYMBOL_ACCESSOR) 639 #undef SYMBOL_ACCESSOR 640 641 // Allocates a new SharedFunctionInfo object. 642 Handle<SharedFunctionInfo> NewSharedFunctionInfo( 643 Handle<String> name, int number_of_literals, FunctionKind kind, 644 Handle<Code> code, Handle<ScopeInfo> scope_info); 645 Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name, 646 MaybeHandle<Code> code, 647 bool is_constructor); 648 649 // Allocates a new JSMessageObject object. 650 Handle<JSMessageObject> NewJSMessageObject(MessageTemplate::Template message, 651 Handle<Object> argument, 652 int start_position, 653 int end_position, 654 Handle<Object> script, 655 Handle<Object> stack_frames); 656 657 Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared); 658 659 // Return a map for given number of properties using the map cache in the 660 // native context. 661 Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context, 662 int number_of_properties, 663 bool* is_result_from_cache); 664 665 // Creates a new FixedArray that holds the data associated with the 666 // atom regexp and stores it in the regexp. 667 void SetRegExpAtomData(Handle<JSRegExp> regexp, 668 JSRegExp::Type type, 669 Handle<String> source, 670 JSRegExp::Flags flags, 671 Handle<Object> match_pattern); 672 673 // Creates a new FixedArray that holds the data associated with the 674 // irregexp regexp and stores it in the regexp. 675 void SetRegExpIrregexpData(Handle<JSRegExp> regexp, 676 JSRegExp::Type type, 677 Handle<String> source, 678 JSRegExp::Flags flags, 679 int capture_count); 680 681 // Returns the value for a known global constant (a property of the global 682 // object which is neither configurable nor writable) like 'undefined'. 683 // Returns a null handle when the given name is unknown. 684 Handle<Object> GlobalConstantFor(Handle<Name> name); 685 686 // Converts the given boolean condition to JavaScript boolean value. 687 Handle<Object> ToBoolean(bool value); 688 689 private: 690 Isolate* isolate() { return reinterpret_cast<Isolate*>(this); } 691 692 // Creates a heap object based on the map. The fields of the heap object are 693 // not initialized by New<>() functions. It's the responsibility of the caller 694 // to do that. 695 template<typename T> 696 Handle<T> New(Handle<Map> map, AllocationSpace space); 697 698 template<typename T> 699 Handle<T> New(Handle<Map> map, 700 AllocationSpace space, 701 Handle<AllocationSite> allocation_site); 702 703 MaybeHandle<String> NewStringFromTwoByte(const uc16* string, int length, 704 PretenureFlag pretenure); 705 706 // Creates a code object that is not yet fully initialized yet. 707 inline Handle<Code> NewCodeRaw(int object_size, bool immovable); 708 709 // Attempt to find the number in a small cache. If we finds it, return 710 // the string representation of the number. Otherwise return undefined. 711 Handle<Object> GetNumberStringCache(Handle<Object> number); 712 713 // Update the cache with a new number-string pair. 714 void SetNumberStringCache(Handle<Object> number, Handle<String> string); 715 716 // Creates a function initialized with a shared part. 717 Handle<JSFunction> NewFunction(Handle<Map> map, 718 Handle<SharedFunctionInfo> info, 719 Handle<Context> context, 720 PretenureFlag pretenure = TENURED); 721 722 // Create a JSArray with no elements and no length. 723 Handle<JSArray> NewJSArray(ElementsKind elements_kind, 724 PretenureFlag pretenure = NOT_TENURED); 725 }; 726 727 } // namespace internal 728 } // namespace v8 729 730 #endif // V8_FACTORY_H_ 731
