deps/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 class FeedbackVectorSpec;
  14
  15 // Interface for handle based allocation.
  16 class Factory FINAL {
  17  public:
  18   Handle<Oddball> NewOddball(Handle<Map> map,
  19                              const char* to_string,
  20                              Handle<Object> to_number,
  21                              byte kind);
  22
  23   // Allocates a fixed array initialized with undefined values.
  24   Handle<FixedArray> NewFixedArray(
  25       int size,
  26       PretenureFlag pretenure = NOT_TENURED);
  27
  28   // Allocate a new fixed array with non-existing entries (the hole).
  29   Handle<FixedArray> NewFixedArrayWithHoles(
  30       int size,
  31       PretenureFlag pretenure = NOT_TENURED);
  32
  33   // Allocates an uninitialized fixed array. It must be filled by the caller.
  34   Handle<FixedArray> NewUninitializedFixedArray(int size);
  35
  36   // Allocate a new uninitialized fixed double array.
  37   // The function returns a pre-allocated empty fixed array for capacity = 0,
  38   // so the return type must be the general fixed array class.
  39   Handle<FixedArrayBase> NewFixedDoubleArray(
  40       int size,
  41       PretenureFlag pretenure = NOT_TENURED);
  42
  43   // Allocate a new fixed double array with hole values.
  44   Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles(
  45       int size,
  46       PretenureFlag pretenure = NOT_TENURED);
  47
  48   Handle<ConstantPoolArray> NewConstantPoolArray(
  49       const ConstantPoolArray::NumberOfEntries& small);
  50
  51   Handle<ConstantPoolArray> NewExtendedConstantPoolArray(
  52       const ConstantPoolArray::NumberOfEntries& small,
  53       const ConstantPoolArray::NumberOfEntries& extended);
  54
  55   Handle<OrderedHashSet> NewOrderedHashSet();
  56   Handle<OrderedHashMap> NewOrderedHashMap();
  57
  58   // Create a new boxed value.
  59   Handle<Box> NewBox(Handle<Object> value);
  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   Handle<String> InternalizeString(Handle<String> str);
  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
  84   // String creation functions.  Most of the string creation functions take
  85   // a Heap::PretenureFlag argument to optionally request that they be
  86   // allocated in the old generation.  The pretenure flag defaults to
  87   // DONT_TENURE.
  88   //
  89   // Creates a new String object.  There are two String encodings: one-byte and
  90   // two-byte.  One should choose between the three string factory functions
  91   // based on the encoding of the string buffer that the string is
  92   // initialized from.
  93   //   - ...FromOneByte initializes the string from a buffer that is Latin1
  94   //     encoded (it does not check that the buffer is Latin1 encoded) and
  95   //     the result will be Latin1 encoded.
  96   //   - ...FromUtf8 initializes the string from a buffer that is UTF-8
  97   //     encoded.  If the characters are all ASCII characters, the result
  98   //     will be Latin1 encoded, otherwise it will converted to two-byte.
  99   //   - ...FromTwoByte initializes the string from a buffer that is two-byte
 100   //     encoded.  If the characters are all Latin1 characters, the result
 101   //     will be converted to Latin1, otherwise it will be left as two-byte.
 102   //
 103   // One-byte strings are pretenured when used as keys in the SourceCodeCache.
 104   MUST_USE_RESULT MaybeHandle<String> NewStringFromOneByte(
 105       Vector<const uint8_t> str,
 106       PretenureFlag pretenure = NOT_TENURED);
 107
 108   template <size_t N>
 109   inline Handle<String> NewStringFromStaticChars(
 110       const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) {
 111     DCHECK(N == StrLength(str) + 1);
 112     return NewStringFromOneByte(STATIC_CHAR_VECTOR(str), pretenure)
 113         .ToHandleChecked();
 114   }
 115
 116   inline Handle<String> NewStringFromAsciiChecked(
 117       const char* str,
 118       PretenureFlag pretenure = NOT_TENURED) {
 119     return NewStringFromOneByte(
 120         OneByteVector(str), pretenure).ToHandleChecked();
 121   }
 122
 123
 124   // Allocates and fully initializes a String.  There are two String encodings:
 125   // one-byte and two-byte. One should choose between the threestring
 126   // allocation functions based on the encoding of the string buffer used to
 127   // initialized the string.
 128   //   - ...FromOneByte initializes the string from a buffer that is Latin1
 129   //     encoded (it does not check that the buffer is Latin1 encoded) and the
 130   //     result will be Latin1 encoded.
 131   //   - ...FromUTF8 initializes the string from a buffer that is UTF-8
 132   //     encoded.  If the characters are all ASCII characters, the result
 133   //     will be Latin1 encoded, otherwise it will converted to two-byte.
 134   //   - ...FromTwoByte initializes the string from a buffer that is two-byte
 135   //     encoded.  If the characters are all Latin1 characters, the
 136   //     result will be converted to Latin1, otherwise it will be left as
 137   //     two-byte.
 138
 139   // TODO(dcarney): remove this function.
 140   MUST_USE_RESULT inline MaybeHandle<String> NewStringFromAscii(
 141       Vector<const char> str,
 142       PretenureFlag pretenure = NOT_TENURED) {
 143     return NewStringFromOneByte(Vector<const uint8_t>::cast(str), pretenure);
 144   }
 145
 146   // UTF8 strings are pretenured when used for regexp literal patterns and
 147   // flags in the parser.
 148   MUST_USE_RESULT MaybeHandle<String> NewStringFromUtf8(
 149       Vector<const char> str,
 150       PretenureFlag pretenure = NOT_TENURED);
 151
 152   MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte(
 153       Vector<const uc16> str,
 154       PretenureFlag pretenure = NOT_TENURED);
 155
 156   // Allocates an internalized string in old space based on the character
 157   // stream.
 158   MUST_USE_RESULT Handle<String> NewInternalizedStringFromUtf8(
 159       Vector<const char> str,
 160       int chars,
 161       uint32_t hash_field);
 162
 163   MUST_USE_RESULT Handle<String> NewOneByteInternalizedString(
 164       Vector<const uint8_t> str, uint32_t hash_field);
 165
 166   MUST_USE_RESULT Handle<String> NewOneByteInternalizedSubString(
 167       Handle<SeqOneByteString> string, int offset, int length,
 168       uint32_t hash_field);
 169
 170   MUST_USE_RESULT Handle<String> NewTwoByteInternalizedString(
 171         Vector<const uc16> str,
 172         uint32_t hash_field);
 173
 174   MUST_USE_RESULT Handle<String> NewInternalizedStringImpl(
 175       Handle<String> string, int chars, uint32_t hash_field);
 176
 177   // Compute the matching internalized string map for a string if possible.
 178   // Empty handle is returned if string is in new space or not flattened.
 179   MUST_USE_RESULT MaybeHandle<Map> InternalizedStringMapForString(
 180       Handle<String> string);
 181
 182   // Allocates and partially initializes an one-byte or two-byte String. The
 183   // characters of the string are uninitialized. Currently used in regexp code
 184   // only, where they are pretenured.
 185   MUST_USE_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
 186       int length,
 187       PretenureFlag pretenure = NOT_TENURED);
 188   MUST_USE_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString(
 189       int length,
 190       PretenureFlag pretenure = NOT_TENURED);
 191
 192   // Creates a single character string where the character has given code.
 193   // A cache is used for Latin1 codes.
 194   Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
 195
 196   // Create a new cons string object which consists of a pair of strings.
 197   MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
 198                                                     Handle<String> right);
 199
 200   // Create a new string object which holds a proper substring of a string.
 201   Handle<String> NewProperSubString(Handle<String> str,
 202                                     int begin,
 203                                     int end);
 204
 205   // Create a new string object which holds a substring of a string.
 206   Handle<String> NewSubString(Handle<String> str, int begin, int end) {
 207     if (begin == 0 && end == str->length()) return str;
 208     return NewProperSubString(str, begin, end);
 209   }
 210
 211   // Creates a new external String object.  There are two String encodings
 212   // in the system: one-byte and two-byte.  Unlike other String types, it does
 213   // not make sense to have a UTF-8 factory function for external strings,
 214   // because we cannot change the underlying buffer.  Note that these strings
 215   // are backed by a string resource that resides outside the V8 heap.
 216   MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
 217       const ExternalOneByteString::Resource* resource);
 218   MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
 219       const ExternalTwoByteString::Resource* resource);
 220
 221   // Create a symbol.
 222   Handle<Symbol> NewSymbol();
 223   Handle<Symbol> NewPrivateSymbol();
 224   Handle<Symbol> NewPrivateOwnSymbol();
 225
 226   // Create a global (but otherwise uninitialized) context.
 227   Handle<Context> NewNativeContext();
 228
 229   // Create a script context.
 230   Handle<Context> NewScriptContext(Handle<JSFunction> function,
 231                                    Handle<ScopeInfo> scope_info);
 232
 233   // Create an empty script context table.
 234   Handle<ScriptContextTable> NewScriptContextTable();
 235
 236   // Create a module context.
 237   Handle<Context> NewModuleContext(Handle<ScopeInfo> scope_info);
 238
 239   // Create a function context.
 240   Handle<Context> NewFunctionContext(int length, Handle<JSFunction> function);
 241
 242   // Create a catch context.
 243   Handle<Context> NewCatchContext(Handle<JSFunction> function,
 244                                   Handle<Context> previous,
 245                                   Handle<String> name,
 246                                   Handle<Object> thrown_object);
 247
 248   // Create a 'with' context.
 249   Handle<Context> NewWithContext(Handle<JSFunction> function,
 250                                  Handle<Context> previous,
 251                                  Handle<JSReceiver> extension);
 252
 253   // Create a block context.
 254   Handle<Context> NewBlockContext(Handle<JSFunction> function,
 255                                   Handle<Context> previous,
 256                                   Handle<ScopeInfo> scope_info);
 257
 258   // Allocate a new struct.  The struct is pretenured (allocated directly in
 259   // the old generation).
 260   Handle<Struct> NewStruct(InstanceType type);
 261
 262   Handle<CodeCache> NewCodeCache();
 263
 264   Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
 265       int aliased_context_slot);
 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   // These objects are used by the api to create env-independent data
 357   // structures in the heap.
 358   inline Handle<JSObject> NewNeanderObject() {
 359     return NewJSObjectFromMap(neander_map());
 360   }
 361
 362   Handle<JSWeakMap> NewJSWeakMap();
 363
 364   Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
 365
 366   // JS objects are pretenured when allocated by the bootstrapper and
 367   // runtime.
 368   Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
 369                                PretenureFlag pretenure = NOT_TENURED);
 370   // JSObject that should have a memento pointing to the allocation site.
 371   Handle<JSObject> NewJSObjectWithMemento(Handle<JSFunction> constructor,
 372                                           Handle<AllocationSite> site);
 373
 374   // Global objects are pretenured and initialized based on a constructor.
 375   Handle<GlobalObject> NewGlobalObject(Handle<JSFunction> constructor);
 376
 377   // JS objects are pretenured when allocated by the bootstrapper and
 378   // runtime.
 379   Handle<JSObject> NewJSObjectFromMap(
 380       Handle<Map> map,
 381       PretenureFlag pretenure = NOT_TENURED,
 382       bool allocate_properties = true,
 383       Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
 384
 385   // JS modules are pretenured.
 386   Handle<JSModule> NewJSModule(Handle<Context> context,
 387                                Handle<ScopeInfo> scope_info);
 388
 389   // JS arrays are pretenured when allocated by the parser.
 390
 391   // Create a JSArray with no elements.
 392   Handle<JSArray> NewJSArray(
 393       ElementsKind elements_kind,
 394       PretenureFlag pretenure = NOT_TENURED);
 395
 396   // Create a JSArray with a specified length and elements initialized
 397   // according to the specified mode.
 398   Handle<JSArray> NewJSArray(
 399       ElementsKind elements_kind, int length, int capacity,
 400       ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
 401       PretenureFlag pretenure = NOT_TENURED);
 402
 403   Handle<JSArray> NewJSArray(
 404       int capacity,
 405       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
 406       PretenureFlag pretenure = NOT_TENURED) {
 407     if (capacity != 0) {
 408       elements_kind = GetHoleyElementsKind(elements_kind);
 409     }
 410     return NewJSArray(elements_kind, 0, capacity,
 411                       INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure);
 412   }
 413
 414   // Create a JSArray with the given elements.
 415   Handle<JSArray> NewJSArrayWithElements(
 416       Handle<FixedArrayBase> elements,
 417       ElementsKind elements_kind,
 418       int length,
 419       PretenureFlag pretenure = NOT_TENURED);
 420
 421   Handle<JSArray> NewJSArrayWithElements(
 422       Handle<FixedArrayBase> elements,
 423       ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
 424       PretenureFlag pretenure = NOT_TENURED) {
 425     return NewJSArrayWithElements(
 426         elements, elements_kind, elements->length(), pretenure);
 427   }
 428
 429   void NewJSArrayStorage(
 430       Handle<JSArray> array,
 431       int length,
 432       int capacity,
 433       ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
 434
 435   Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
 436
 437   Handle<JSArrayBuffer> NewJSArrayBuffer();
 438
 439   Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type);
 440
 441   // Creates a new JSTypedArray with the specified buffer.
 442   Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
 443                                        Handle<JSArrayBuffer> buffer,
 444                                        size_t byte_offset, size_t length);
 445
 446   Handle<JSDataView> NewJSDataView();
 447   Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer,
 448                                    size_t byte_offset, size_t byte_length);
 449
 450   // TODO(aandrey): Maybe these should take table, index and kind arguments.
 451   Handle<JSMapIterator> NewJSMapIterator();
 452   Handle<JSSetIterator> NewJSSetIterator();
 453
 454   // Allocates a Harmony proxy.
 455   Handle<JSProxy> NewJSProxy(Handle<Object> handler, Handle<Object> prototype);
 456
 457   // Allocates a Harmony function proxy.
 458   Handle<JSProxy> NewJSFunctionProxy(Handle<Object> handler,
 459                                      Handle<Object> call_trap,
 460                                      Handle<Object> construct_trap,
 461                                      Handle<Object> prototype);
 462
 463   // Reinitialize an JSGlobalProxy based on a constructor.  The object
 464   // must have the same size as objects allocated using the
 465   // constructor.  The object is reinitialized and behaves as an
 466   // object that has been freshly allocated using the constructor.
 467   void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
 468                                  Handle<JSFunction> constructor);
 469
 470   Handle<JSGlobalProxy> NewUninitializedJSGlobalProxy();
 471
 472   // Change the type of the argument into a JS object/function and reinitialize.
 473   void BecomeJSObject(Handle<JSProxy> object);
 474   void BecomeJSFunction(Handle<JSProxy> object);
 475
 476   Handle<JSFunction> NewFunction(Handle<String> name,
 477                                  Handle<Code> code,
 478                                  Handle<Object> prototype,
 479                                  bool read_only_prototype = false);
 480   Handle<JSFunction> NewFunction(Handle<String> name);
 481   Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
 482                                                  Handle<Code> code);
 483
 484   Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
 485       Handle<SharedFunctionInfo> function_info,
 486       Handle<Context> context,
 487       PretenureFlag pretenure = TENURED);
 488
 489   Handle<JSFunction> NewFunction(Handle<String> name, Handle<Code> code,
 490                                  Handle<Object> prototype, InstanceType type,
 491                                  int instance_size,
 492                                  bool read_only_prototype = false,
 493                                  bool install_constructor = false);
 494   Handle<JSFunction> NewFunction(Handle<String> name,
 495                                  Handle<Code> code,
 496                                  InstanceType type,
 497                                  int instance_size);
 498
 499   // Create a serialized scope info.
 500   Handle<ScopeInfo> NewScopeInfo(int length);
 501
 502   // Create an External object for V8's external API.
 503   Handle<JSObject> NewExternal(void* value);
 504
 505   // The reference to the Code object is stored in self_reference.
 506   // This allows generated code to reference its own Code object
 507   // by containing this handle.
 508   Handle<Code> NewCode(const CodeDesc& desc,
 509                        Code::Flags flags,
 510                        Handle<Object> self_reference,
 511                        bool immovable = false,
 512                        bool crankshafted = false,
 513                        int prologue_offset = Code::kPrologueOffsetNotSet,
 514                        bool is_debug = false);
 515
 516   Handle<Code> CopyCode(Handle<Code> code);
 517
 518   Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info);
 519
 520   // Interface for creating error objects.
 521
 522   MaybeHandle<Object> NewError(const char* maker, const char* message,
 523                                Handle<JSArray> args);
 524   Handle<String> EmergencyNewError(const char* message, Handle<JSArray> args);
 525   MaybeHandle<Object> NewError(const char* maker, const char* message,
 526                                Vector<Handle<Object> > args);
 527   MaybeHandle<Object> NewError(const char* message,
 528                                Vector<Handle<Object> > args);
 529   MaybeHandle<Object> NewError(Handle<String> message);
 530   MaybeHandle<Object> NewError(const char* constructor, Handle<String> message);
 531
 532   MaybeHandle<Object> NewTypeError(const char* message,
 533                                    Vector<Handle<Object> > args);
 534   MaybeHandle<Object> NewTypeError(Handle<String> message);
 535
 536   MaybeHandle<Object> NewRangeError(const char* message,
 537                                     Vector<Handle<Object> > args);
 538   MaybeHandle<Object> NewRangeError(Handle<String> message);
 539
 540   MaybeHandle<Object> NewInvalidStringLengthError() {
 541     return NewRangeError("invalid_string_length",
 542                          HandleVector<Object>(NULL, 0));
 543   }
 544
 545   MaybeHandle<Object> NewSyntaxError(const char* message, Handle<JSArray> args);
 546   MaybeHandle<Object> NewSyntaxError(Handle<String> message);
 547
 548   MaybeHandle<Object> NewReferenceError(const char* message,
 549                                         Vector<Handle<Object> > args);
 550   MaybeHandle<Object> NewReferenceError(const char* message,
 551                                         Handle<JSArray> args);
 552   MaybeHandle<Object> NewReferenceError(Handle<String> message);
 553
 554   MaybeHandle<Object> NewEvalError(const char* message,
 555                                    Vector<Handle<Object> > args);
 556
 557   Handle<String> NumberToString(Handle<Object> number,
 558                                 bool check_number_string_cache = true);
 559
 560   Handle<String> Uint32ToString(uint32_t value) {
 561     return NumberToString(NewNumberFromUint(value));
 562   }
 563
 564   Handle<JSFunction> InstallMembers(Handle<JSFunction> function);
 565
 566 #define ROOT_ACCESSOR(type, name, camel_name)                         \
 567   inline Handle<type> name() {                                        \
 568     return Handle<type>(bit_cast<type**>(                             \
 569         &isolate()->heap()->roots_[Heap::k##camel_name##RootIndex])); \
 570   }
 571   ROOT_LIST(ROOT_ACCESSOR)
 572 #undef ROOT_ACCESSOR
 573
 574 #define STRUCT_MAP_ACCESSOR(NAME, Name, name)                      \
 575   inline Handle<Map> name##_map() {                                \
 576     return Handle<Map>(bit_cast<Map**>(                            \
 577         &isolate()->heap()->roots_[Heap::k##Name##MapRootIndex])); \
 578   }
 579   STRUCT_LIST(STRUCT_MAP_ACCESSOR)
 580 #undef STRUCT_MAP_ACCESSOR
 581
 582 #define STRING_ACCESSOR(name, str)                              \
 583   inline Handle<String> name() {                                \
 584     return Handle<String>(bit_cast<String**>(                   \
 585         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
 586   }
 587   INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
 588 #undef STRING_ACCESSOR
 589
 590 #define SYMBOL_ACCESSOR(name)                                   \
 591   inline Handle<Symbol> name() {                                \
 592     return Handle<Symbol>(bit_cast<Symbol**>(                   \
 593         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
 594   }
 595   PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR)
 596 #undef SYMBOL_ACCESSOR
 597
 598 #define SYMBOL_ACCESSOR(name, varname, description)             \
 599   inline Handle<Symbol> name() {                                \
 600     return Handle<Symbol>(bit_cast<Symbol**>(                   \
 601         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
 602   }
 603   PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR)
 604 #undef SYMBOL_ACCESSOR
 605
 606   inline void set_string_table(Handle<StringTable> table) {
 607     isolate()->heap()->set_string_table(*table);
 608   }
 609
 610   Handle<String> hidden_string() {
 611     return Handle<String>(&isolate()->heap()->hidden_string_);
 612   }
 613
 614   // Allocates a new SharedFunctionInfo object.
 615   Handle<SharedFunctionInfo> NewSharedFunctionInfo(
 616       Handle<String> name, int number_of_literals, FunctionKind kind,
 617       Handle<Code> code, Handle<ScopeInfo> scope_info,
 618       Handle<TypeFeedbackVector> feedback_vector);
 619   Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name,
 620                                                    MaybeHandle<Code> code);
 621
 622   // Allocate a new type feedback vector
 623   Handle<TypeFeedbackVector> NewTypeFeedbackVector(
 624       const FeedbackVectorSpec& spec);
 625
 626   // Allocates a new JSMessageObject object.
 627   Handle<JSMessageObject> NewJSMessageObject(
 628       Handle<String> type,
 629       Handle<JSArray> arguments,
 630       int start_position,
 631       int end_position,
 632       Handle<Object> script,
 633       Handle<Object> stack_frames);
 634
 635   Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
 636
 637   // Return a map for given number of properties using the map cache in the
 638   // native context.
 639   Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context,
 640                                         int number_of_properties,
 641                                         bool* is_result_from_cache);
 642
 643   // Creates a new FixedArray that holds the data associated with the
 644   // atom regexp and stores it in the regexp.
 645   void SetRegExpAtomData(Handle<JSRegExp> regexp,
 646                          JSRegExp::Type type,
 647                          Handle<String> source,
 648                          JSRegExp::Flags flags,
 649                          Handle<Object> match_pattern);
 650
 651   // Creates a new FixedArray that holds the data associated with the
 652   // irregexp regexp and stores it in the regexp.
 653   void SetRegExpIrregexpData(Handle<JSRegExp> regexp,
 654                              JSRegExp::Type type,
 655                              Handle<String> source,
 656                              JSRegExp::Flags flags,
 657                              int capture_count);
 658
 659   // Returns the value for a known global constant (a property of the global
 660   // object which is neither configurable nor writable) like 'undefined'.
 661   // Returns a null handle when the given name is unknown.
 662   Handle<Object> GlobalConstantFor(Handle<String> name);
 663
 664   // Converts the given boolean condition to JavaScript boolean value.
 665   Handle<Object> ToBoolean(bool value);
 666
 667  private:
 668   Isolate* isolate() { return reinterpret_cast<Isolate*>(this); }
 669
 670   // Creates a heap object based on the map. The fields of the heap object are
 671   // not initialized by New<>() functions. It's the responsibility of the caller
 672   // to do that.
 673   template<typename T>
 674   Handle<T> New(Handle<Map> map, AllocationSpace space);
 675
 676   template<typename T>
 677   Handle<T> New(Handle<Map> map,
 678                 AllocationSpace space,
 679                 Handle<AllocationSite> allocation_site);
 680
 681   // Creates a code object that is not yet fully initialized yet.
 682   inline Handle<Code> NewCodeRaw(int object_size, bool immovable);
 683
 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);
 687
 688   // Update the cache with a new number-string pair.
 689   void SetNumberStringCache(Handle<Object> number, Handle<String> string);
 690
 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);
 698
 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);
 704
 705   Handle<JSFunction> NewFunction(Handle<Map> map,
 706                                  Handle<String> name,
 707                                  MaybeHandle<Code> maybe_code);
 708
 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);
 714 };
 715
 716 } }  // namespace v8::internal
 717
 718 #endif  // V8_FACTORY_H_