text: // Copyright 2014 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef V8_FACTORY_H_
  #define V8_FACTORY_H_
  
  #include "src/isolate.h"
  #include "src/messages.h"
  
  namespace v8 {
  namespace internal {
  
  class StaticFeedbackVectorSpec;
  
  // Interface for handle based allocation.
  class Factory final {
   public:
    Handle<Oddball> NewOddball(Handle<Map> map, const char* to_string,
                               Handle<Object> to_number, const char* type_of,
                               byte kind);
  
    // Allocates a fixed array initialized with undefined values.
    Handle<FixedArray> NewFixedArray(
        int size,
        PretenureFlag pretenure = NOT_TENURED);
  
    // Allocate a new fixed array with non-existing entries (the hole).
    Handle<FixedArray> NewFixedArrayWithHoles(
        int size,
        PretenureFlag pretenure = NOT_TENURED);
  
    // Allocates an uninitialized fixed array. It must be filled by the caller.
    Handle<FixedArray> NewUninitializedFixedArray(int size);
  
    // Allocate a new uninitialized fixed double array.
    // The function returns a pre-allocated empty fixed array for capacity = 0,
    // so the return type must be the general fixed array class.
    Handle<FixedArrayBase> NewFixedDoubleArray(
        int size,
        PretenureFlag pretenure = NOT_TENURED);
  
    // Allocate a new fixed double array with hole values.
    Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles(
        int size,
        PretenureFlag pretenure = NOT_TENURED);
  
    Handle<OrderedHashSet> NewOrderedHashSet();
    Handle<OrderedHashMap> NewOrderedHashMap();
  
    // Create a new boxed value.
    Handle<Box> NewBox(Handle<Object> value);
  
    // Create a new PrototypeInfo struct.
    Handle<PrototypeInfo> NewPrototypeInfo();
  
    // Create a new SloppyBlockWithEvalContextExtension struct.
    Handle<SloppyBlockWithEvalContextExtension>
    NewSloppyBlockWithEvalContextExtension(Handle<ScopeInfo> scope_info,
                                           Handle<JSObject> extension);
  
    // Create a pre-tenured empty AccessorPair.
    Handle<AccessorPair> NewAccessorPair();
  
    // Create an empty TypeFeedbackInfo.
    Handle<TypeFeedbackInfo> NewTypeFeedbackInfo();
  
    // Finds the internalized copy for string in the string table.
    // If not found, a new string is added to the table and returned.
    Handle<String> InternalizeUtf8String(Vector<const char> str);
    Handle<String> InternalizeUtf8String(const char* str) {
      return InternalizeUtf8String(CStrVector(str));
    }
    Handle<String> InternalizeString(Handle<String> str);
    Handle<String> InternalizeOneByteString(Vector<const uint8_t> str);
    Handle<String> InternalizeOneByteString(
        Handle<SeqOneByteString>, int from, int length);
  
    Handle<String> InternalizeTwoByteString(Vector<const uc16> str);
  
    template<class StringTableKey>
    Handle<String> InternalizeStringWithKey(StringTableKey* key);
  
  
    // String creation functions.  Most of the string creation functions take
    // a Heap::PretenureFlag argument to optionally request that they be
    // allocated in the old generation.  The pretenure flag defaults to
    // DONT_TENURE.
    //
    // Creates a new String object.  There are two String encodings: one-byte and
    // two-byte.  One should choose between the three string factory functions
    // based on the encoding of the string buffer that the string is
    // initialized from.
    //   - ...FromOneByte initializes the string from a buffer that is Latin1
    //     encoded (it does not check that the buffer is Latin1 encoded) and
    //     the result will be Latin1 encoded.
    //   - ...FromUtf8 initializes the string from a buffer that is UTF-8
    //     encoded.  If the characters are all ASCII characters, the result
    //     will be Latin1 encoded, otherwise it will converted to two-byte.
    //   - ...FromTwoByte initializes the string from a buffer that is two-byte
    //     encoded.  If the characters are all Latin1 characters, the result
    //     will be converted to Latin1, otherwise it will be left as two-byte.
    //
    // One-byte strings are pretenured when used as keys in the SourceCodeCache.
    MUST_USE_RESULT MaybeHandle<String> NewStringFromOneByte(
        Vector<const uint8_t> str,
        PretenureFlag pretenure = NOT_TENURED);
  
    template <size_t N>
    inline Handle<String> NewStringFromStaticChars(
        const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) {
      DCHECK(N == StrLength(str) + 1);
      return NewStringFromOneByte(STATIC_CHAR_VECTOR(str), pretenure)
          .ToHandleChecked();
    }
  
    inline Handle<String> NewStringFromAsciiChecked(
        const char* str,
        PretenureFlag pretenure = NOT_TENURED) {
      return NewStringFromOneByte(
          OneByteVector(str), pretenure).ToHandleChecked();
    }
  
  
    // Allocates and fully initializes a String.  There are two String encodings:
    // one-byte and two-byte. One should choose between the threestring
    // allocation functions based on the encoding of the string buffer used to
    // initialized the string.
    //   - ...FromOneByte initializes the string from a buffer that is Latin1
    //     encoded (it does not check that the buffer is Latin1 encoded) and the
    //     result will be Latin1 encoded.
    //   - ...FromUTF8 initializes the string from a buffer that is UTF-8
    //     encoded.  If the characters are all ASCII characters, the result
    //     will be Latin1 encoded, otherwise it will converted to two-byte.
    //   - ...FromTwoByte initializes the string from a buffer that is two-byte
    //     encoded.  If the characters are all Latin1 characters, the
    //     result will be converted to Latin1, otherwise it will be left as
    //     two-byte.
  
    // TODO(dcarney): remove this function.
    MUST_USE_RESULT inline MaybeHandle<String> NewStringFromAscii(
        Vector<const char> str,
        PretenureFlag pretenure = NOT_TENURED) {
      return NewStringFromOneByte(Vector<const uint8_t>::cast(str), pretenure);
    }
  
    // UTF8 strings are pretenured when used for regexp literal patterns and
    // flags in the parser.
    MUST_USE_RESULT MaybeHandle<String> NewStringFromUtf8(
        Vector<const char> str,
        PretenureFlag pretenure = NOT_TENURED);
  
    MUST_USE_RESULT MaybeHandle<String> NewStringFromTwoByte(
        Vector<const uc16> str,
        PretenureFlag pretenure = NOT_TENURED);
  
    // Allocates an internalized string in old space based on the character
    // stream.
    Handle<String> NewInternalizedStringFromUtf8(Vector<const char> str,
                                                 int chars, uint32_t hash_field);
  
    Handle<String> NewOneByteInternalizedString(Vector<const uint8_t> str,
                                                uint32_t hash_field);
  
    Handle<String> NewOneByteInternalizedSubString(
        Handle<SeqOneByteString> string, int offset, int length,
        uint32_t hash_field);
  
    Handle<String> NewTwoByteInternalizedString(Vector<const uc16> str,
                                                uint32_t hash_field);
  
    Handle<String> NewInternalizedStringImpl(Handle<String> string, int chars,
                                             uint32_t hash_field);
  
    // Compute the matching internalized string map for a string if possible.
    // Empty handle is returned if string is in new space or not flattened.
    MUST_USE_RESULT MaybeHandle<Map> InternalizedStringMapForString(
        Handle<String> string);
  
    // Allocates and partially initializes an one-byte or two-byte String. The
    // characters of the string are uninitialized. Currently used in regexp code
    // only, where they are pretenured.
    MUST_USE_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
        int length,
        PretenureFlag pretenure = NOT_TENURED);
    MUST_USE_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString(
        int length,
        PretenureFlag pretenure = NOT_TENURED);
  
    // Creates a single character string where the character has given code.
    // A cache is used for Latin1 codes.
    Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
  
    // Create a new cons string object which consists of a pair of strings.
    MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
                                                      Handle<String> right);
  
    // Create a new string object which holds a proper substring of a string.
    Handle<String> NewProperSubString(Handle<String> str,
                                      int begin,
                                      int end);
  
    // Create a new string object which holds a substring of a string.
    Handle<String> NewSubString(Handle<String> str, int begin, int end) {
      if (begin == 0 && end == str->length()) return str;
      return NewProperSubString(str, begin, end);
    }
  
    // Creates a new external String object.  There are two String encodings
    // in the system: one-byte and two-byte.  Unlike other String types, it does
    // not make sense to have a UTF-8 factory function for external strings,
    // because we cannot change the underlying buffer.  Note that these strings
    // are backed by a string resource that resides outside the V8 heap.
    MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
        const ExternalOneByteString::Resource* resource);
    MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
        const ExternalTwoByteString::Resource* resource);
  
    // Create a symbol.
    Handle<Symbol> NewSymbol();
    Handle<Symbol> NewPrivateSymbol(Handle<Object> name);
  
    // Create a global (but otherwise uninitialized) context.
    Handle<Context> NewNativeContext();
  
    // Create a script context.
    Handle<Context> NewScriptContext(Handle<JSFunction> function,
                                     Handle<ScopeInfo> scope_info);
  
    // Create an empty script context table.
    Handle<ScriptContextTable> NewScriptContextTable();
  
    // Create a module context.
    Handle<Context> NewModuleContext(Handle<ScopeInfo> scope_info);
  
    // Create a function context.
    Handle<Context> NewFunctionContext(int length, Handle<JSFunction> function);
  
    // Create a catch context.
    Handle<Context> NewCatchContext(Handle<JSFunction> function,
                                    Handle<Context> previous,
                                    Handle<String> name,
                                    Handle<Object> thrown_object);
  
    // Create a 'with' context.
    Handle<Context> NewWithContext(Handle<JSFunction> function,
                                   Handle<Context> previous,
                                   Handle<JSReceiver> extension);
  
    // Create a block context.
    Handle<Context> NewBlockContext(Handle<JSFunction> function,
                                    Handle<Context> previous,
                                    Handle<ScopeInfo> scope_info);
  
    // Allocate a new struct.  The struct is pretenured (allocated directly in
    // the old generation).
    Handle<Struct> NewStruct(InstanceType type);
  
    Handle<CodeCache> NewCodeCache();
  
    Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
        int aliased_context_slot);
  
    Handle<ExecutableAccessorInfo> NewExecutableAccessorInfo();
  
    Handle<Script> NewScript(Handle<String> source);
  
    // Foreign objects are pretenured when allocated by the bootstrapper.
    Handle<Foreign> NewForeign(Address addr,
                               PretenureFlag pretenure = NOT_TENURED);
  
    // Allocate a new foreign object.  The foreign is pretenured (allocated
    // directly in the old generation).
    Handle<Foreign> NewForeign(const AccessorDescriptor* foreign);
  
    Handle<ByteArray> NewByteArray(int length,
                                   PretenureFlag pretenure = NOT_TENURED);
  
    Handle<BytecodeArray> NewBytecodeArray(int length, const byte* raw_bytecodes,
                                           int frame_size, int parameter_count,
                                           Handle<FixedArray> constant_pool);
  
    Handle<FixedTypedArrayBase> NewFixedTypedArrayWithExternalPointer(
        int length, ExternalArrayType array_type, void* external_pointer,
        PretenureFlag pretenure = NOT_TENURED);
  
    Handle<FixedTypedArrayBase> NewFixedTypedArray(
        int length, ExternalArrayType array_type, bool initialize,
        PretenureFlag pretenure = NOT_TENURED);
  
    Handle<Cell> NewCell(Handle<Object> value);
  
    Handle<PropertyCell> NewPropertyCell();
  
    Handle<WeakCell> NewWeakCell(Handle<HeapObject> value);
  
    // Allocate a tenured AllocationSite. It's payload is null.
    Handle<AllocationSite> NewAllocationSite();
  
    Handle<Map> NewMap(
        InstanceType type,
        int instance_size,
        ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND);
  
    Handle<HeapObject> NewFillerObject(int size,
                                       bool double_align,
                                       AllocationSpace space);
  
    Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
  
    Handle<JSObject> CopyJSObject(Handle<JSObject> object);
  
    Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object,
                                                    Handle<AllocationSite> site);
  
    Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array,
                                             Handle<Map> map);
  
    Handle<FixedArray> CopyFixedArrayAndGrow(
        Handle<FixedArray> array, int grow_by,
        PretenureFlag pretenure = NOT_TENURED);
  
    Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
  
    // This method expects a COW array in new space, and creates a copy
    // of it in old space.
    Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
  
    Handle<FixedDoubleArray> CopyFixedDoubleArray(
        Handle<FixedDoubleArray> array);
  
    // Numbers (e.g. literals) are pretenured by the parser.
    // The return value may be a smi or a heap number.
    Handle<Object> NewNumber(double value,
                             PretenureFlag pretenure = NOT_TENURED);
  
    Handle<Object> NewNumberFromInt(int32_t value,
                                    PretenureFlag pretenure = NOT_TENURED);
    Handle<Object> NewNumberFromUint(uint32_t value,
                                    PretenureFlag pretenure = NOT_TENURED);
    Handle<Object> NewNumberFromSize(size_t value,
                                     PretenureFlag pretenure = NOT_TENURED) {
      if (Smi::IsValid(static_cast<intptr_t>(value))) {
        return Handle<Object>(Smi::FromIntptr(static_cast<intptr_t>(value)),
                              isolate());
      }
      return NewNumber(static_cast<double>(value), pretenure);
    }
    Handle<HeapNumber> NewHeapNumber(double value,
                                     MutableMode mode = IMMUTABLE,
                                     PretenureFlag pretenure = NOT_TENURED);
  
  #define SIMD128_NEW_DECL(TYPE, Type, type, lane_count, lane_type) \
    Handle<Type> New##Type(lane_type lanes[lane_count],             \
                           PretenureFlag pretenure = NOT_TENURED);
    SIMD128_TYPES(SIMD128_NEW_DECL)
  #undef SIMD128_NEW_DECL
  
    // These objects are used by the api to create env-independent data
    // structures in the heap.
    inline Handle<JSObject> NewNeanderObject() {
      return NewJSObjectFromMap(neander_map());
    }
  
    Handle<JSWeakMap> NewJSWeakMap();
  
    Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
  
    // JS objects are pretenured when allocated by the bootstrapper and
    // runtime.
    Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
                                 PretenureFlag pretenure = NOT_TENURED);
    // JSObject that should have a memento pointing to the allocation site.
    Handle<JSObject> NewJSObjectWithMemento(Handle<JSFunction> constructor,
                                            Handle<AllocationSite> site);
  
    // Global objects are pretenured and initialized based on a constructor.
    Handle<GlobalObject> NewGlobalObject(Handle<JSFunction> constructor);
  
    // JS objects are pretenured when allocated by the bootstrapper and
    // runtime.
    Handle<JSObject> NewJSObjectFromMap(
        Handle<Map> map,
        PretenureFlag pretenure = NOT_TENURED,
        Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
  
    // JS modules are pretenured.
    Handle<JSModule> NewJSModule(Handle<Context> context,
                                 Handle<ScopeInfo> scope_info);
  
    // JS arrays are pretenured when allocated by the parser.
  
    // Create a JSArray with no elements.
    Handle<JSArray> NewJSArray(ElementsKind elements_kind,
                               Strength strength = Strength::WEAK,
                               PretenureFlag pretenure = NOT_TENURED);
  
    // Create a JSArray with a specified length and elements initialized
    // according to the specified mode.
    Handle<JSArray> NewJSArray(
        ElementsKind elements_kind, int length, int capacity,
        Strength strength = Strength::WEAK,
        ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
        PretenureFlag pretenure = NOT_TENURED);
  
    Handle<JSArray> NewJSArray(
        int capacity, ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
        Strength strength = Strength::WEAK,
        PretenureFlag pretenure = NOT_TENURED) {
      if (capacity != 0) {
        elements_kind = GetHoleyElementsKind(elements_kind);
      }
      return NewJSArray(elements_kind, 0, capacity, strength,
                        INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure);
    }
  
    // Create a JSArray with the given elements.
    Handle<JSArray> NewJSArrayWithElements(Handle<FixedArrayBase> elements,
                                           ElementsKind elements_kind, int length,
                                           Strength strength = Strength::WEAK,
                                           PretenureFlag pretenure = NOT_TENURED);
  
    Handle<JSArray> NewJSArrayWithElements(
        Handle<FixedArrayBase> elements,
        ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
        Strength strength = Strength::WEAK,
        PretenureFlag pretenure = NOT_TENURED) {
      return NewJSArrayWithElements(elements, elements_kind, elements->length(),
                                    strength, pretenure);
    }
  
    void NewJSArrayStorage(
        Handle<JSArray> array,
        int length,
        int capacity,
        ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
  
    Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
  
    Handle<JSArrayBuffer> NewJSArrayBuffer(
        SharedFlag shared = SharedFlag::kNotShared,
        PretenureFlag pretenure = NOT_TENURED);
  
    Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
                                         PretenureFlag pretenure = NOT_TENURED);
  
    Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
                                         PretenureFlag pretenure = NOT_TENURED);
  
    // Creates a new JSTypedArray with the specified buffer.
    Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
                                         Handle<JSArrayBuffer> buffer,
                                         size_t byte_offset, size_t length,
                                         PretenureFlag pretenure = NOT_TENURED);
  
    // Creates a new on-heap JSTypedArray.
    Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
                                         size_t number_of_elements,
                                         PretenureFlag pretenure = NOT_TENURED);
  
    Handle<JSDataView> NewJSDataView();
    Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer,
                                     size_t byte_offset, size_t byte_length);
  
    Handle<JSMap> NewJSMap();
    Handle<JSSet> NewJSSet();
  
    // TODO(aandrey): Maybe these should take table, index and kind arguments.
    Handle<JSMapIterator> NewJSMapIterator();
    Handle<JSSetIterator> NewJSSetIterator();
  
    // Creates a new JSIteratorResult object with the arguments {value} and
    // {done}.  Implemented according to ES6 section 7.4.7 CreateIterResultObject.
    Handle<JSIteratorResult> NewJSIteratorResult(Handle<Object> value,
                                                 Handle<Object> done);
  
    // Allocates a Harmony proxy.
    Handle<JSProxy> NewJSProxy(Handle<Object> handler, Handle<Object> prototype);
  
    // Allocates a Harmony function proxy.
    Handle<JSProxy> NewJSFunctionProxy(Handle<Object> handler,
                                       Handle<JSReceiver> call_trap,
                                       Handle<Object> construct_trap,
                                       Handle<Object> prototype);
  
    // Reinitialize an JSGlobalProxy based on a constructor.  The object
    // must have the same size as objects allocated using the
    // constructor.  The object is reinitialized and behaves as an
    // object that has been freshly allocated using the constructor.
    void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
                                   Handle<JSFunction> constructor);
  
    Handle<JSGlobalProxy> NewUninitializedJSGlobalProxy();
  
    // Change the type of the argument into a JS object/function and reinitialize.
    void BecomeJSObject(Handle<JSProxy> object);
    void BecomeJSFunction(Handle<JSProxy> object);
  
    Handle<JSFunction> NewFunction(Handle<String> name, Handle<Code> code,
                                   Handle<Object> prototype,
                                   bool read_only_prototype = false,
                                   bool is_strict = false);
    Handle<JSFunction> NewFunction(Handle<String> name);
    Handle<JSFunction> NewFunctionWithoutPrototype(Handle<String> name,
                                                   Handle<Code> code,
                                                   bool is_strict = false);
  
    Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
        Handle<SharedFunctionInfo> function_info,
        Handle<Context> context,
        PretenureFlag pretenure = TENURED);
  
    Handle<JSFunction> NewFunction(Handle<String> name, Handle<Code> code,
                                   Handle<Object> prototype, InstanceType type,
                                   int instance_size,
                                   bool read_only_prototype = false,
                                   bool install_constructor = false,
                                   bool is_strict = false);
    Handle<JSFunction> NewFunction(Handle<String> name,
                                   Handle<Code> code,
                                   InstanceType type,
                                   int instance_size);
  
    // Create a serialized scope info.
    Handle<ScopeInfo> NewScopeInfo(int length);
  
    // Create an External object for V8's external API.
    Handle<JSObject> NewExternal(void* value);
  
    // The reference to the Code object is stored in self_reference.
    // This allows generated code to reference its own Code object
    // by containing this handle.
    Handle<Code> NewCode(const CodeDesc& desc,
                         Code::Flags flags,
                         Handle<Object> self_reference,
                         bool immovable = false,
                         bool crankshafted = false,
                         int prologue_offset = Code::kPrologueOffsetNotSet,
                         bool is_debug = false);
  
    Handle<Code> CopyCode(Handle<Code> code);
  
    Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info);
  
    // Interface for creating error objects.
    Handle<Object> NewError(Handle<JSFunction> constructor,
                            Handle<String> message);
  
    Handle<Object> NewInvalidStringLengthError() {
      return NewRangeError(MessageTemplate::kInvalidStringLength);
    }
  
    Handle<Object> NewError(Handle<JSFunction> constructor,
                            MessageTemplate::Template template_index,
                            Handle<Object> arg0 = Handle<Object>(),
                            Handle<Object> arg1 = Handle<Object>(),
                            Handle<Object> arg2 = Handle<Object>());
  
  #define DECLARE_ERROR(NAME)                                          \
    Handle<Object> New##NAME(MessageTemplate::Template template_index, \
                             Handle<Object> arg0 = Handle<Object>(),   \
                             Handle<Object> arg1 = Handle<Object>(),   \
                             Handle<Object> arg2 = Handle<Object>());
    DECLARE_ERROR(Error)
    DECLARE_ERROR(EvalError)
    DECLARE_ERROR(RangeError)
    DECLARE_ERROR(ReferenceError)
    DECLARE_ERROR(SyntaxError)
    DECLARE_ERROR(TypeError)
  #undef DEFINE_ERROR
  
    Handle<String> NumberToString(Handle<Object> number,
                                  bool check_number_string_cache = true);
  
    Handle<String> Uint32ToString(uint32_t value) {
      return NumberToString(NewNumberFromUint(value));
    }
  
    Handle<JSFunction> InstallMembers(Handle<JSFunction> function);
  
  #define ROOT_ACCESSOR(type, name, camel_name)                         \
    inline Handle<type> name() {                                        \
      return Handle<type>(bit_cast<type**>(                             \
          &isolate()->heap()->roots_[Heap::k##camel_name##RootIndex])); \
    }
    ROOT_LIST(ROOT_ACCESSOR)
  #undef ROOT_ACCESSOR
  
  #define STRUCT_MAP_ACCESSOR(NAME, Name, name)                      \
    inline Handle<Map> name##_map() {                                \
      return Handle<Map>(bit_cast<Map**>(                            \
          &isolate()->heap()->roots_[Heap::k##Name##MapRootIndex])); \
    }
    STRUCT_LIST(STRUCT_MAP_ACCESSOR)
  #undef STRUCT_MAP_ACCESSOR
  
  #define STRING_ACCESSOR(name, str)                              \
    inline Handle<String> name() {                                \
      return Handle<String>(bit_cast<String**>(                   \
          &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
    }
    INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
  #undef STRING_ACCESSOR
  
  #define SYMBOL_ACCESSOR(name)                                   \
    inline Handle<Symbol> name() {                                \
      return Handle<Symbol>(bit_cast<Symbol**>(                   \
          &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
    }
    PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR)
  #undef SYMBOL_ACCESSOR
  
  #define SYMBOL_ACCESSOR(name, description)                      \
    inline Handle<Symbol> name() {                                \
      return Handle<Symbol>(bit_cast<Symbol**>(                   \
          &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
    }
    PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR)
  #undef SYMBOL_ACCESSOR
  
    // Allocates a new SharedFunctionInfo object.
    Handle<SharedFunctionInfo> NewSharedFunctionInfo(
        Handle<String> name, int number_of_literals, FunctionKind kind,
        Handle<Code> code, Handle<ScopeInfo> scope_info,
        Handle<TypeFeedbackVector> feedback_vector);
    Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name,
                                                     MaybeHandle<Code> code);
  
    // Allocate a new type feedback vector
    template <typename Spec>
    Handle<TypeFeedbackVector> NewTypeFeedbackVector(const Spec* spec);
  
    // Allocates a new JSMessageObject object.
    Handle<JSMessageObject> NewJSMessageObject(MessageTemplate::Template message,
                                               Handle<Object> argument,
                                               int start_position,
                                               int end_position,
                                               Handle<Object> script,
                                               Handle<Object> stack_frames);
  
    Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
  
    // Return a map for given number of properties using the map cache in the
    // native context.
    Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context,
                                          int number_of_properties,
                                          bool is_strong,
                                          bool* is_result_from_cache);
  
    // Creates a new FixedArray that holds the data associated with the
    // atom regexp and stores it in the regexp.
    void SetRegExpAtomData(Handle<JSRegExp> regexp,
                           JSRegExp::Type type,
                           Handle<String> source,
                           JSRegExp::Flags flags,
                           Handle<Object> match_pattern);
  
    // Creates a new FixedArray that holds the data associated with the
    // irregexp regexp and stores it in the regexp.
    void SetRegExpIrregexpData(Handle<JSRegExp> regexp,
                               JSRegExp::Type type,
                               Handle<String> source,
                               JSRegExp::Flags flags,
                               int capture_count);
  
    // Returns the value for a known global constant (a property of the global
    // object which is neither configurable nor writable) like 'undefined'.
    // Returns a null handle when the given name is unknown.
    Handle<Object> GlobalConstantFor(Handle<Name> name);
  
    // Converts the given boolean condition to JavaScript boolean value.
    Handle<Object> ToBoolean(bool value);
  
   private:
    Isolate* isolate() { return reinterpret_cast<Isolate*>(this); }
  
    // Creates a heap object based on the map. The fields of the heap object are
    // not initialized by New<>() functions. It's the responsibility of the caller
    // to do that.
    template<typename T>
    Handle<T> New(Handle<Map> map, AllocationSpace space);
  
    template<typename T>
    Handle<T> New(Handle<Map> map,
                  AllocationSpace space,
                  Handle<AllocationSite> allocation_site);
  
    // Creates a code object that is not yet fully initialized yet.
    inline Handle<Code> NewCodeRaw(int object_size, bool immovable);
  
    // Attempt to find the number in a small cache.  If we finds it, return
    // the string representation of the number.  Otherwise return undefined.
    Handle<Object> GetNumberStringCache(Handle<Object> number);
  
    // Update the cache with a new number-string pair.
    void SetNumberStringCache(Handle<Object> number, Handle<String> string);
  
    // Initializes a function with a shared part and prototype.
    // Note: this code was factored out of NewFunction such that other parts of
    // the VM could use it. Specifically, a function that creates instances of
    // type JS_FUNCTION_TYPE benefit from the use of this function.
    inline void InitializeFunction(Handle<JSFunction> function,
                                   Handle<SharedFunctionInfo> info,
                                   Handle<Context> context);
  
    // Creates a function initialized with a shared part.
    Handle<JSFunction> NewFunction(Handle<Map> map,
                                   Handle<SharedFunctionInfo> info,
                                   Handle<Context> context,
                                   PretenureFlag pretenure = TENURED);
  
    Handle<JSFunction> NewFunction(Handle<Map> map,
                                   Handle<String> name,
                                   MaybeHandle<Code> maybe_code);
  
    // Reinitialize a JSProxy into an (empty) JS object of respective type and
    // size, but keeping the original prototype.  The receiver must have at least
    // the size of the new object.  The object is reinitialized and behaves as an
    // object that has been freshly allocated.
    void ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type, int size);
  };
  
  } }  // namespace v8::internal
  
  #endif  // V8_FACTORY_H_
  