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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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4848 // |transitioned_map| when its elements_kind is changed to |elements_kind|. | 4848 // |transitioned_map| when its elements_kind is changed to |elements_kind|. |
4849 MUST_USE_RESULT MaybeObject* AddElementsTransition( | 4849 MUST_USE_RESULT MaybeObject* AddElementsTransition( |
4850 ElementsKind elements_kind, Map* transitioned_map); | 4850 ElementsKind elements_kind, Map* transitioned_map); |
4851 | 4851 |
4852 // Returns the transitioned map for this map with the most generic | 4852 // Returns the transitioned map for this map with the most generic |
4853 // elements_kind that's found in |candidates|, or null handle if no match is | 4853 // elements_kind that's found in |candidates|, or null handle if no match is |
4854 // found at all. | 4854 // found at all. |
4855 Handle<Map> FindTransitionedMap(MapHandleList* candidates); | 4855 Handle<Map> FindTransitionedMap(MapHandleList* candidates); |
4856 Map* FindTransitionedMap(MapList* candidates); | 4856 Map* FindTransitionedMap(MapList* candidates); |
4857 | 4857 |
| 4858 // Zaps the contents of backing data structures in debug mode. Note that the |
| 4859 // heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects |
| 4860 // holding weak references when incremental marking is used. |
| 4861 #ifdef DEBUG |
| 4862 void ZapInstanceDescriptors(); |
| 4863 void ZapPrototypeTransitions(); |
| 4864 #endif |
4858 | 4865 |
4859 // Dispatched behavior. | 4866 // Dispatched behavior. |
4860 #ifdef OBJECT_PRINT | 4867 #ifdef OBJECT_PRINT |
4861 inline void MapPrint() { | 4868 inline void MapPrint() { |
4862 MapPrint(stdout); | 4869 MapPrint(stdout); |
4863 } | 4870 } |
4864 void MapPrint(FILE* out); | 4871 void MapPrint(FILE* out); |
4865 #endif | 4872 #endif |
4866 #ifdef DEBUG | 4873 #ifdef DEBUG |
4867 void MapVerify(); | 4874 void MapVerify(); |
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8660 } else { | 8667 } else { |
8661 value &= ~(1 << bit_position); | 8668 value &= ~(1 << bit_position); |
8662 } | 8669 } |
8663 return value; | 8670 return value; |
8664 } | 8671 } |
8665 }; | 8672 }; |
8666 | 8673 |
8667 } } // namespace v8::internal | 8674 } } // namespace v8::internal |
8668 | 8675 |
8669 #endif // V8_OBJECTS_H_ | 8676 #endif // V8_OBJECTS_H_ |
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