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Issue 801813002: Using PropertyKind in transitions instead of PropertyType. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 6 years ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_OBJECTS_H_ 5 #ifndef V8_OBJECTS_H_
6 #define V8_OBJECTS_H_ 6 #define V8_OBJECTS_H_
7 7
8 #include <iosfwd> 8 #include <iosfwd>
9 9
10 #include "src/allocation.h" 10 #include "src/allocation.h"
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5842 // Returns true if the current map doesn't have DICTIONARY_ELEMENTS but if a 5842 // Returns true if the current map doesn't have DICTIONARY_ELEMENTS but if a
5843 // map with DICTIONARY_ELEMENTS was found in the prototype chain. 5843 // map with DICTIONARY_ELEMENTS was found in the prototype chain.
5844 bool DictionaryElementsInPrototypeChainOnly(); 5844 bool DictionaryElementsInPrototypeChainOnly();
5845 5845
5846 inline bool HasTransitionArray() const; 5846 inline bool HasTransitionArray() const;
5847 inline bool HasElementsTransition(); 5847 inline bool HasElementsTransition();
5848 inline Map* elements_transition_map(); 5848 inline Map* elements_transition_map();
5849 5849
5850 inline Map* GetTransition(int transition_index); 5850 inline Map* GetTransition(int transition_index);
5851 inline int SearchSpecialTransition(Symbol* name); 5851 inline int SearchSpecialTransition(Symbol* name);
5852 inline int SearchTransition(PropertyType type, Name* name, 5852 inline int SearchTransition(PropertyKind kind, Name* name,
5853 PropertyAttributes attributes); 5853 PropertyAttributes attributes);
5854 inline FixedArrayBase* GetInitialElements(); 5854 inline FixedArrayBase* GetInitialElements();
5855 5855
5856 DECL_ACCESSORS(transitions, TransitionArray) 5856 DECL_ACCESSORS(transitions, TransitionArray)
5857 5857
5858 static inline Handle<String> ExpectedTransitionKey(Handle<Map> map); 5858 static inline Handle<String> ExpectedTransitionKey(Handle<Map> map);
5859 static inline Handle<Map> ExpectedTransitionTarget(Handle<Map> map); 5859 static inline Handle<Map> ExpectedTransitionTarget(Handle<Map> map);
5860 5860
5861 // Try to follow an existing transition to a field with attributes NONE. The 5861 // Try to follow an existing transition to a field with attributes NONE. The
5862 // return value indicates whether the transition was successful. 5862 // return value indicates whether the transition was successful.
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6419 // Zaps the contents of backing data structures. Note that the 6419 // Zaps the contents of backing data structures. Note that the
6420 // heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects 6420 // heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects
6421 // holding weak references when incremental marking is used, because it also 6421 // holding weak references when incremental marking is used, because it also
6422 // iterates over objects that are otherwise unreachable. 6422 // iterates over objects that are otherwise unreachable.
6423 // In general we only want to call these functions in release mode when 6423 // In general we only want to call these functions in release mode when
6424 // heap verification is turned on. 6424 // heap verification is turned on.
6425 void ZapPrototypeTransitions(); 6425 void ZapPrototypeTransitions();
6426 void ZapTransitions(); 6426 void ZapTransitions();
6427 6427
6428 void DeprecateTransitionTree(); 6428 void DeprecateTransitionTree();
6429 bool DeprecateTarget(PropertyType type, Name* key, 6429 bool DeprecateTarget(PropertyKind kind, Name* key,
6430 PropertyAttributes attributes, 6430 PropertyAttributes attributes,
6431 DescriptorArray* new_descriptors, 6431 DescriptorArray* new_descriptors,
6432 LayoutDescriptor* new_layout_descriptor); 6432 LayoutDescriptor* new_layout_descriptor);
6433 6433
6434 Map* FindLastMatchMap(int verbatim, int length, DescriptorArray* descriptors); 6434 Map* FindLastMatchMap(int verbatim, int length, DescriptorArray* descriptors);
6435 6435
6436 void UpdateFieldType(int descriptor_number, Handle<Name> name, 6436 void UpdateFieldType(int descriptor_number, Handle<Name> name,
6437 Representation new_representation, 6437 Representation new_representation,
6438 Handle<HeapType> new_type); 6438 Handle<HeapType> new_type);
6439 6439
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11043 } else { 11043 } else {
11044 value &= ~(1 << bit_position); 11044 value &= ~(1 << bit_position);
11045 } 11045 }
11046 return value; 11046 return value;
11047 } 11047 }
11048 }; 11048 };
11049 11049
11050 } } // namespace v8::internal 11050 } } // namespace v8::internal
11051 11051
11052 #endif // V8_OBJECTS_H_ 11052 #endif // V8_OBJECTS_H_
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