src/v8/src/factory.h

   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   Handle<WeakCell> NewWeakCell(Handle<HeapObject> value);
 300
 301   // Allocate a tenured AllocationSite. It's payload is null.
 302   Handle<AllocationSite> NewAllocationSite();
 303
 304   Handle<Map> NewMap(
 305       InstanceType type,
 306       int instance_size,
 307       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND);
 308
 309   Handle<HeapObject> NewFillerObject(int size,
 310                                      bool double_align,
 311                                      AllocationSpace space);
 312
 313   Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
 314
 315   Handle<JSObject> CopyJSObject(Handle<JSObject> object);
 316
 317   Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object,
 318                                                   Handle<AllocationSite> site);
 319
 320   Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array,
 321                                            Handle<Map> map);
 322
 323   Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
 324
 325   // This method expects a COW array in new space, and creates a copy
 326   // of it in old space.
 327   Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
 328
 329   Handle<FixedDoubleArray> CopyFixedDoubleArray(
 330       Handle<FixedDoubleArray> array);
 331
 332   Handle<ConstantPoolArray> CopyConstantPoolArray(
 333       Handle<ConstantPoolArray> array);
 334
 335   // Numbers (e.g. literals) are pretenured by the parser.
 336   // The return value may be a smi or a heap number.
 337   Handle<Object> NewNumber(double value,
 338                            PretenureFlag pretenure = NOT_TENURED);
 339
 340   Handle<Object> NewNumberFromInt(int32_t value,
 341                                   PretenureFlag pretenure = NOT_TENURED);
 342   Handle<Object> NewNumberFromUint(uint32_t value,
 343                                   PretenureFlag pretenure = NOT_TENURED);
 344   Handle<Object> NewNumberFromSize(size_t value,
 345                                    PretenureFlag pretenure = NOT_TENURED) {
 346     if (Smi::IsValid(static_cast<intptr_t>(value))) {
 347       return Handle<Object>(Smi::FromIntptr(static_cast<intptr_t>(value)),
 348                             isolate());
 349     }
 350     return NewNumber(static_cast<double>(value), pretenure);
 351   }
 352   Handle<HeapNumber> NewHeapNumber(double value,
 353                                    MutableMode mode = IMMUTABLE,
 354                                    PretenureFlag pretenure = NOT_TENURED);
 355
 356   Handle<Float32x4> NewFloat32x4(float32x4_value_t value,
 357                                  PretenureFlag pretenure = NOT_TENURED);
 358
 359   Handle<Float64x2> NewFloat64x2(float64x2_value_t value,
 360                                  PretenureFlag pretenure = NOT_TENURED);
 361
 362   Handle<Int32x4> NewInt32x4(int32x4_value_t value,
 363                                PretenureFlag pretenure = NOT_TENURED);
 364
 365   // These objects are used by the api to create env-independent data
 366   // structures in the heap.
 367   inline Handle<JSObject> NewNeanderObject() {
 368     return NewJSObjectFromMap(neander_map());
 369   }
 370
 371   Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
 372
 373   // JS objects are pretenured when allocated by the bootstrapper and
 374   // runtime.
 375   Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
 376                                PretenureFlag pretenure = NOT_TENURED);
 377   // JSObject that should have a memento pointing to the allocation site.
 378   Handle<JSObject> NewJSObjectWithMemento(Handle<JSFunction> constructor,
 379                                           Handle<AllocationSite> site);
 380
 381   // Global objects are pretenured and initialized based on a constructor.
 382   Handle<GlobalObject> NewGlobalObject(Handle<JSFunction> constructor);
 383
 384   // JS objects are pretenured when allocated by the bootstrapper and
 385   // runtime.
 386   Handle<JSObject> NewJSObjectFromMap(
 387       Handle<Map> map,
 388       PretenureFlag pretenure = NOT_TENURED,
 389       bool allocate_properties = true,
 390       Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
 391
 392   // JS modules are pretenured.
 393   Handle<JSModule> NewJSModule(Handle<Context> context,
 394                                Handle<ScopeInfo> scope_info);
 395
 396   // JS arrays are pretenured when allocated by the parser.
 397
 398   // Create a JSArray with no elements.
 399   Handle<JSArray> NewJSArray(
 400       ElementsKind elements_kind,
 401       PretenureFlag pretenure = NOT_TENURED);
 402
 403   // Create a JSArray with a specified length and elements initialized
 404   // according to the specified mode.
 405   Handle<JSArray> NewJSArray(
 406       ElementsKind elements_kind, int length, int capacity,
 407       ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
 408       PretenureFlag pretenure = NOT_TENURED);
 409
 410   Handle<JSArray> NewJSArray(
 411       int capacity,
 412       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
 413       PretenureFlag pretenure = NOT_TENURED) {
 414     if (capacity != 0) {
 415       elements_kind = GetHoleyElementsKind(elements_kind);
 416     }
 417     return NewJSArray(elements_kind, 0, capacity,
 418                       INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure);
 419   }
 420
 421   // Create a JSArray with the given elements.
 422   Handle<JSArray> NewJSArrayWithElements(
 423       Handle<FixedArrayBase> elements,
 424       ElementsKind elements_kind,
 425       int length,
 426       PretenureFlag pretenure = NOT_TENURED);
 427
 428   Handle<JSArray> NewJSArrayWithElements(
 429       Handle<FixedArrayBase> elements,
 430       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
 431       PretenureFlag pretenure = NOT_TENURED) {
 432     return NewJSArrayWithElements(
 433         elements, elements_kind, elements->length(), pretenure);
 434   }
 435
 436   void NewJSArrayStorage(
 437       Handle<JSArray> array,
 438       int length,
 439       int capacity,
 440       ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
 441
 442   Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
 443
 444   Handle<JSArrayBuffer> NewJSArrayBuffer();
 445
 446   Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type);
 447
 448   // Creates a new JSTypedArray with the specified buffer.
 449   Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
 450                                        Handle<JSArrayBuffer> buffer,
 451                                        size_t byte_offset, size_t length);
 452
 453   Handle<JSDataView> NewJSDataView();
 454   Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer,
 455                                    size_t byte_offset, size_t byte_length);
 456
 457   // TODO(aandrey): Maybe these should take table, index and kind arguments.
 458   Handle<JSMapIterator> NewJSMapIterator();
 459   Handle<JSSetIterator> NewJSSetIterator();
 460
 461   // Allocates a Harmony proxy.
 462   Handle<JSProxy> NewJSProxy(Handle<Object> handler, Handle<Object> prototype);
 463
 464   // Allocates a Harmony function proxy.
 465   Handle<JSProxy> NewJSFunctionProxy(Handle<Object> handler,
 466                                      Handle<Object> call_trap,
 467                                      Handle<Object> construct_trap,
 468                                      Handle<Object> prototype);
 469
 470   // Reinitialize an JSGlobalProxy based on a constructor.  The object
 471   // must have the same size as objects allocated using the
 472   // constructor.  The object is reinitialized and behaves as an
 473   // object that has been freshly allocated using the constructor.
 474   void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
 475                                  Handle<JSFunction> constructor);
 476
 477   // Change the type of the argument into a JS object/function and reinitialize.
 478   void BecomeJSObject(Handle<JSProxy> object);
 479   void BecomeJSFunction(Handle<JSProxy> object);
 480
 481   Handle<JSFunction> NewFunction(Handle<String> name,
 482                                  Handle<Code> code,
 483                                  Handle<Object> prototype,
 484                                  bool read_only_prototype = false);
 485   Handle<JSFunction> NewFunction(Handle<String> name);
 486   Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
 487                                                  Handle<Code> code);
 488
 489   Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
 490       Handle<SharedFunctionInfo> function_info,
 491       Handle<Context> context,
 492       PretenureFlag pretenure = TENURED);
 493
 494   Handle<JSFunction> NewFunction(Handle<String> name,
 495                                  Handle<Code> code,
 496                                  Handle<Object> prototype,
 497                                  InstanceType type,
 498                                  int instance_size,
 499                                  bool read_only_prototype = false);
 500   Handle<JSFunction> NewFunction(Handle<String> name,
 501                                  Handle<Code> code,
 502                                  InstanceType type,
 503                                  int instance_size);
 504
 505   // Create a serialized scope info.
 506   Handle<ScopeInfo> NewScopeInfo(int length);
 507
 508   // Create an External object for V8's external API.
 509   Handle<JSObject> NewExternal(void* value);
 510
 511   // The reference to the Code object is stored in self_reference.
 512   // This allows generated code to reference its own Code object
 513   // by containing this handle.
 514   Handle<Code> NewCode(const CodeDesc& desc,
 515                        Code::Flags flags,
 516                        Handle<Object> self_reference,
 517                        bool immovable = false,
 518                        bool crankshafted = false,
 519                        int prologue_offset = Code::kPrologueOffsetNotSet,
 520                        bool is_debug = false);
 521
 522   Handle<Code> CopyCode(Handle<Code> code);
 523
 524   Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info);
 525
 526   // Interface for creating error objects.
 527
 528   MaybeHandle<Object> NewError(const char* maker, const char* message,
 529                                Handle<JSArray> args);
 530   Handle<String> EmergencyNewError(const char* message, Handle<JSArray> args);
 531   MaybeHandle<Object> NewError(const char* maker, const char* message,
 532                                Vector<Handle<Object> > args);
 533   MaybeHandle<Object> NewError(const char* message,
 534                                Vector<Handle<Object> > args);
 535   MaybeHandle<Object> NewError(Handle<String> message);
 536   MaybeHandle<Object> NewError(const char* constructor, Handle<String> message);
 537
 538   MaybeHandle<Object> NewTypeError(const char* message,
 539                                    Vector<Handle<Object> > args);
 540   MaybeHandle<Object> NewTypeError(Handle<String> message);
 541
 542   MaybeHandle<Object> NewRangeError(const char* message,
 543                                     Vector<Handle<Object> > args);
 544   MaybeHandle<Object> NewRangeError(Handle<String> message);
 545
 546   MaybeHandle<Object> NewInvalidStringLengthError() {
 547     return NewRangeError("invalid_string_length",
 548                          HandleVector<Object>(NULL, 0));
 549   }
 550
 551   MaybeHandle<Object> NewSyntaxError(const char* message, Handle<JSArray> args);
 552   MaybeHandle<Object> NewSyntaxError(Handle<String> message);
 553
 554   MaybeHandle<Object> NewReferenceError(const char* message,
 555                                         Vector<Handle<Object> > args);
 556   MaybeHandle<Object> NewReferenceError(const char* message,
 557                                         Handle<JSArray> args);
 558   MaybeHandle<Object> NewReferenceError(Handle<String> message);
 559
 560   MaybeHandle<Object> NewEvalError(const char* message,
 561                                    Vector<Handle<Object> > args);
 562
 563   Handle<String> NumberToString(Handle<Object> number,
 564                                 bool check_number_string_cache = true);
 565
 566   Handle<String> Uint32ToString(uint32_t value) {
 567     return NumberToString(NewNumberFromUint(value));
 568   }
 569
 570   enum ApiInstanceType {
 571     JavaScriptObjectType,
 572     GlobalObjectType,
 573     GlobalProxyType
 574   };
 575
 576   Handle<JSFunction> CreateApiFunction(
 577       Handle<FunctionTemplateInfo> data,
 578       Handle<Object> prototype,
 579       ApiInstanceType type = JavaScriptObjectType);
 580
 581   Handle<JSFunction> InstallMembers(Handle<JSFunction> function);
 582
 583   // Installs interceptors on the instance.  'desc' is a function template,
 584   // and instance is an object instance created by the function of this
 585   // function template.
 586   MUST_USE_RESULT MaybeHandle<FunctionTemplateInfo> ConfigureInstance(
 587       Handle<FunctionTemplateInfo> desc, Handle<JSObject> instance);
 588
 589 #define ROOT_ACCESSOR(type, name, camel_name)                         \
 590   inline Handle<type> name() {                                        \
 591     return Handle<type>(bit_cast<type**>(                             \
 592         &isolate()->heap()->roots_[Heap::k##camel_name##RootIndex])); \
 593   }
 594   ROOT_LIST(ROOT_ACCESSOR)
 595 #undef ROOT_ACCESSOR
 596
 597 #define STRUCT_MAP_ACCESSOR(NAME, Name, name)                      \
 598   inline Handle<Map> name##_map() {                                \
 599     return Handle<Map>(bit_cast<Map**>(                            \
 600         &isolate()->heap()->roots_[Heap::k##Name##MapRootIndex])); \
 601   }
 602   STRUCT_LIST(STRUCT_MAP_ACCESSOR)
 603 #undef STRUCT_MAP_ACCESSOR
 604
 605 #define STRING_ACCESSOR(name, str)                              \
 606   inline Handle<String> name() {                                \
 607     return Handle<String>(bit_cast<String**>(                   \
 608         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
 609   }
 610   INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
 611 #undef STRING_ACCESSOR
 612
 613 #define SYMBOL_ACCESSOR(name)                                   \
 614   inline Handle<Symbol> name() {                                \
 615     return Handle<Symbol>(bit_cast<Symbol**>(                   \
 616         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
 617   }
 618   PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR)
 619 #undef SYMBOL_ACCESSOR
 620
 621   inline void set_string_table(Handle<StringTable> table) {
 622     isolate()->heap()->set_string_table(*table);
 623   }
 624
 625   Handle<String> hidden_string() {
 626     return Handle<String>(&isolate()->heap()->hidden_string_);
 627   }
 628
 629   // Allocates a new SharedFunctionInfo object.
 630   Handle<SharedFunctionInfo> NewSharedFunctionInfo(
 631       Handle<String> name, int number_of_literals, FunctionKind kind,
 632       Handle<Code> code, Handle<ScopeInfo> scope_info,
 633       Handle<TypeFeedbackVector> feedback_vector);
 634   Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name,
 635                                                    MaybeHandle<Code> code);
 636
 637   // Allocate a new type feedback vector
 638   Handle<TypeFeedbackVector> NewTypeFeedbackVector(int slot_count,
 639                                                    int ic_slot_count);
 640
 641   // Allocates a new JSMessageObject object.
 642   Handle<JSMessageObject> NewJSMessageObject(
 643       Handle<String> type,
 644       Handle<JSArray> arguments,
 645       int start_position,
 646       int end_position,
 647       Handle<Object> script,
 648       Handle<Object> stack_frames);
 649
 650   Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
 651
 652   // Return a map using the map cache in the native context.
 653   // The key the an ordered set of property names.
 654   Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context,
 655                                         Handle<FixedArray> keys);
 656
 657   // Creates a new FixedArray that holds the data associated with the
 658   // atom regexp and stores it in the regexp.
 659   void SetRegExpAtomData(Handle<JSRegExp> regexp,
 660                          JSRegExp::Type type,
 661                          Handle<String> source,
 662                          JSRegExp::Flags flags,
 663                          Handle<Object> match_pattern);
 664
 665   // Creates a new FixedArray that holds the data associated with the
 666   // irregexp regexp and stores it in the regexp.
 667   void SetRegExpIrregexpData(Handle<JSRegExp> regexp,
 668                              JSRegExp::Type type,
 669                              Handle<String> source,
 670                              JSRegExp::Flags flags,
 671                              int capture_count);
 672
 673   // Returns the value for a known global constant (a property of the global
 674   // object which is neither configurable nor writable) like 'undefined'.
 675   // Returns a null handle when the given name is unknown.
 676   Handle<Object> GlobalConstantFor(Handle<String> name);
 677
 678   // Converts the given boolean condition to JavaScript boolean value.
 679   Handle<Object> ToBoolean(bool value);
 680
 681  private:
 682   Isolate* isolate() { return reinterpret_cast<Isolate*>(this); }
 683
 684   // Creates a heap object based on the map. The fields of the heap object are
 685   // not initialized by New<>() functions. It's the responsibility of the caller
 686   // to do that.
 687   template<typename T>
 688   Handle<T> New(Handle<Map> map, AllocationSpace space);
 689
 690   template<typename T>
 691   Handle<T> New(Handle<Map> map,
 692                 AllocationSpace space,
 693                 Handle<AllocationSite> allocation_site);
 694
 695   // Creates a code object that is not yet fully initialized yet.
 696   inline Handle<Code> NewCodeRaw(int object_size, bool immovable);
 697
 698   // Create a new map cache.
 699   Handle<MapCache> NewMapCache(int at_least_space_for);
 700
 701   // Update the map cache in the native context with (keys, map)
 702   Handle<MapCache> AddToMapCache(Handle<Context> context,
 703                                  Handle<FixedArray> keys,
 704                                  Handle<Map> map);
 705
 706   // Attempt to find the number in a small cache.  If we finds it, return
 707   // the string representation of the number.  Otherwise return undefined.
 708   Handle<Object> GetNumberStringCache(Handle<Object> number);
 709
 710   // Update the cache with a new number-string pair.
 711   void SetNumberStringCache(Handle<Object> number, Handle<String> string);
 712
 713   // Initializes a function with a shared part and prototype.
 714   // Note: this code was factored out of NewFunction such that other parts of
 715   // the VM could use it. Specifically, a function that creates instances of
 716   // type JS_FUNCTION_TYPE benefit from the use of this function.
 717   inline void InitializeFunction(Handle<JSFunction> function,
 718                                  Handle<SharedFunctionInfo> info,
 719                                  Handle<Context> context);
 720
 721   // Creates a function initialized with a shared part.
 722   Handle<JSFunction> NewFunction(Handle<Map> map,
 723                                  Handle<SharedFunctionInfo> info,
 724                                  Handle<Context> context,
 725                                  PretenureFlag pretenure = TENURED);
 726
 727   Handle<JSFunction> NewFunction(Handle<Map> map,
 728                                  Handle<String> name,
 729                                  MaybeHandle<Code> maybe_code);
 730
 731   // Reinitialize a JSProxy into an (empty) JS object of respective type and
 732   // size, but keeping the original prototype.  The receiver must have at least
 733   // the size of the new object.  The object is reinitialized and behaves as an
 734   // object that has been freshly allocated.
 735   void ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type, int size);
 736 };
 737
 738 } }  // namespace v8::internal
 739
 740 #endif  // V8_FACTORY_H_