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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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6408 // Returns a non-deprecated version of the input. If the input was not | 6408 // Returns a non-deprecated version of the input. If the input was not |
6409 // deprecated, it is directly returned. Otherwise, the non-deprecated version | 6409 // deprecated, it is directly returned. Otherwise, the non-deprecated version |
6410 // is found by re-transitioning from the root of the transition tree using the | 6410 // is found by re-transitioning from the root of the transition tree using the |
6411 // descriptor array of the map. Returns NULL if no updated map is found. | 6411 // descriptor array of the map. Returns NULL if no updated map is found. |
6412 // This method also applies any pending migrations along the prototype chain. | 6412 // This method also applies any pending migrations along the prototype chain. |
6413 static Handle<Map> CurrentMapForDeprecated(Handle<Map> map); | 6413 static Handle<Map> CurrentMapForDeprecated(Handle<Map> map); |
6414 // Same as above, but does not touch the prototype chain. | 6414 // Same as above, but does not touch the prototype chain. |
6415 static Handle<Map> CurrentMapForDeprecatedInternal(Handle<Map> map); | 6415 static Handle<Map> CurrentMapForDeprecatedInternal(Handle<Map> map); |
6416 | 6416 |
6417 static Handle<Map> CopyDropDescriptors(Handle<Map> map); | 6417 static Handle<Map> CopyDropDescriptors(Handle<Map> map); |
6418 static Handle<Map> CopyReplaceDescriptors( | |
6419 Handle<Map> map, | |
6420 Handle<DescriptorArray> descriptors, | |
6421 TransitionFlag flag, | |
6422 Handle<Name> name, | |
6423 SimpleTransitionFlag simple_flag = FULL_TRANSITION); | |
6424 static Handle<Map> CopyReplaceDescriptors( | |
6425 Handle<Map> map, | |
6426 Handle<DescriptorArray> descriptors, | |
6427 TransitionFlag flag, | |
6428 SimpleTransitionFlag simple_flag = FULL_TRANSITION); | |
6429 static Handle<Map> CopyInsertDescriptor(Handle<Map> map, | 6418 static Handle<Map> CopyInsertDescriptor(Handle<Map> map, |
6430 Descriptor* descriptor, | 6419 Descriptor* descriptor, |
6431 TransitionFlag flag); | 6420 TransitionFlag flag); |
6432 static Handle<Map> CopyReplaceDescriptor(Handle<Map> map, | 6421 static Handle<Map> CopyReplaceDescriptor(Handle<Map> map, |
6433 Handle<DescriptorArray> descriptors, | 6422 Handle<DescriptorArray> descriptors, |
6434 Descriptor* descriptor, | 6423 Descriptor* descriptor, |
6435 int index, | 6424 int index, |
6436 TransitionFlag flag); | 6425 TransitionFlag flag); |
6437 | 6426 |
6438 static Handle<Map> CopyWithField(Handle<Map> map, | 6427 static Handle<Map> CopyWithField(Handle<Map> map, |
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6449 TransitionFlag flag); | 6438 TransitionFlag flag); |
6450 | 6439 |
6451 static Handle<Map> AsElementsKind(Handle<Map> map, ElementsKind kind); | 6440 static Handle<Map> AsElementsKind(Handle<Map> map, ElementsKind kind); |
6452 | 6441 |
6453 static Handle<Map> CopyAsElementsKind(Handle<Map> map, | 6442 static Handle<Map> CopyAsElementsKind(Handle<Map> map, |
6454 ElementsKind kind, | 6443 ElementsKind kind, |
6455 TransitionFlag flag); | 6444 TransitionFlag flag); |
6456 | 6445 |
6457 static Handle<Map> CopyForObserved(Handle<Map> map); | 6446 static Handle<Map> CopyForObserved(Handle<Map> map); |
6458 | 6447 |
| 6448 static Handle<Map> CopyForFreeze(Handle<Map> map); |
| 6449 |
6459 static Handle<Map> CopyNormalized(Handle<Map> map, | 6450 static Handle<Map> CopyNormalized(Handle<Map> map, |
6460 PropertyNormalizationMode mode, | 6451 PropertyNormalizationMode mode, |
6461 NormalizedMapSharingMode sharing); | 6452 NormalizedMapSharingMode sharing); |
6462 | 6453 |
6463 inline void AppendDescriptor(Descriptor* desc); | 6454 inline void AppendDescriptor(Descriptor* desc); |
6464 | 6455 |
6465 // Returns a copy of the map, with all transitions dropped from the | 6456 // Returns a copy of the map, with all transitions dropped from the |
6466 // instance descriptors. | 6457 // instance descriptors. |
6467 static Handle<Map> Copy(Handle<Map> map); | 6458 static Handle<Map> Copy(Handle<Map> map); |
6468 static Handle<Map> Create(Handle<JSFunction> constructor, | 6459 static Handle<Map> Create(Handle<JSFunction> constructor, |
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6694 static Handle<Map> ShareDescriptor(Handle<Map> map, | 6685 static Handle<Map> ShareDescriptor(Handle<Map> map, |
6695 Handle<DescriptorArray> descriptors, | 6686 Handle<DescriptorArray> descriptors, |
6696 Descriptor* descriptor); | 6687 Descriptor* descriptor); |
6697 static Handle<Map> CopyInstallDescriptors( | 6688 static Handle<Map> CopyInstallDescriptors( |
6698 Handle<Map> map, | 6689 Handle<Map> map, |
6699 int new_descriptor, | 6690 int new_descriptor, |
6700 Handle<DescriptorArray> descriptors); | 6691 Handle<DescriptorArray> descriptors); |
6701 static Handle<Map> CopyAddDescriptor(Handle<Map> map, | 6692 static Handle<Map> CopyAddDescriptor(Handle<Map> map, |
6702 Descriptor* descriptor, | 6693 Descriptor* descriptor, |
6703 TransitionFlag flag); | 6694 TransitionFlag flag); |
| 6695 static Handle<Map> CopyReplaceDescriptors( |
| 6696 Handle<Map> map, |
| 6697 Handle<DescriptorArray> descriptors, |
| 6698 TransitionFlag flag, |
| 6699 Handle<Name> name, |
| 6700 SimpleTransitionFlag simple_flag = FULL_TRANSITION); |
6704 | 6701 |
6705 // Zaps the contents of backing data structures. Note that the | 6702 // Zaps the contents of backing data structures. Note that the |
6706 // heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects | 6703 // heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects |
6707 // holding weak references when incremental marking is used, because it also | 6704 // holding weak references when incremental marking is used, because it also |
6708 // iterates over objects that are otherwise unreachable. | 6705 // iterates over objects that are otherwise unreachable. |
6709 // In general we only want to call these functions in release mode when | 6706 // In general we only want to call these functions in release mode when |
6710 // heap verification is turned on. | 6707 // heap verification is turned on. |
6711 void ZapPrototypeTransitions(); | 6708 void ZapPrototypeTransitions(); |
6712 void ZapTransitions(); | 6709 void ZapTransitions(); |
6713 | 6710 |
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11062 } else { | 11059 } else { |
11063 value &= ~(1 << bit_position); | 11060 value &= ~(1 << bit_position); |
11064 } | 11061 } |
11065 return value; | 11062 return value; |
11066 } | 11063 } |
11067 }; | 11064 }; |
11068 | 11065 |
11069 } } // namespace v8::internal | 11066 } } // namespace v8::internal |
11070 | 11067 |
11071 #endif // V8_OBJECTS_H_ | 11068 #endif // V8_OBJECTS_H_ |
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