// Copyright 2018 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_OBJECTS_PROPERTY_CELL_H_ #define V8_OBJECTS_PROPERTY_CELL_H_ #include "src/objects/heap-object.h" // Has to be the last include (doesn't have include guards): #include "src/objects/object-macros.h" namespace v8 { namespace internal { class PropertyCell : public HeapObject { public: // [name]: the name of the global property. DECL_ACCESSORS(name, Name) // [property_details]: details of the global property. DECL_ACCESSORS(property_details_raw, Object) // [value]: value of the global property. DECL_ACCESSORS(value, Object) // [dependent_code]: dependent code that depends on the type of the global // property. DECL_ACCESSORS(dependent_code, DependentCode) inline PropertyDetails property_details() const; inline void set_property_details(PropertyDetails details); PropertyCellConstantType GetConstantType(); // Computes the new type of the cell's contents for the given value, but // without actually modifying the details. static PropertyCellType UpdatedType(Isolate* isolate, Handle<PropertyCell> cell, Handle<Object> value, PropertyDetails details); // Prepares property cell at given entry for receiving given value. // As a result the old cell could be invalidated and/or dependent code could // be deoptimized. Returns the prepared property cell. static Handle<PropertyCell> PrepareForValue( Isolate* isolate, Handle<GlobalDictionary> dictionary, int entry, Handle<Object> value, PropertyDetails details); static Handle<PropertyCell> InvalidateEntry( Isolate* isolate, Handle<GlobalDictionary> dictionary, int entry); static void SetValueWithInvalidation(Isolate* isolate, Handle<PropertyCell> cell, Handle<Object> new_value); DECL_CAST(PropertyCell) // Dispatched behavior. DECL_PRINTER(PropertyCell) DECL_VERIFIER(PropertyCell) // Layout description. #define PROPERTY_CELL_FIELDS(V) \ V(kDetailsOffset, kTaggedSize) \ V(kNameOffset, kTaggedSize) \ V(kValueOffset, kTaggedSize) \ V(kDependentCodeOffset, kTaggedSize) \ /* Total size. */ \ V(kSize, 0) DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, PROPERTY_CELL_FIELDS) #undef PROPERTY_CELL_FIELDS typedef FixedBodyDescriptor<kNameOffset, kSize, kSize> BodyDescriptor; OBJECT_CONSTRUCTORS(PropertyCell, HeapObject); }; } // namespace internal } // namespace v8 #include "src/objects/object-macros-undef.h" #endif // V8_OBJECTS_PROPERTY_CELL_H_