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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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4677 // Bit field 2. | 4677 // Bit field 2. |
4678 inline byte bit_field2(); | 4678 inline byte bit_field2(); |
4679 inline void set_bit_field2(byte value); | 4679 inline void set_bit_field2(byte value); |
4680 | 4680 |
4681 // Bit field 3. | 4681 // Bit field 3. |
4682 inline int bit_field3(); | 4682 inline int bit_field3(); |
4683 inline void set_bit_field3(int value); | 4683 inline void set_bit_field3(int value); |
4684 | 4684 |
4685 class IsShared: public BitField<bool, 0, 1> {}; | 4685 class IsShared: public BitField<bool, 0, 1> {}; |
4686 class FunctionWithPrototype: public BitField<bool, 1, 1> {}; | 4686 class FunctionWithPrototype: public BitField<bool, 1, 1> {}; |
4687 class LastAddedBits: public BitField<int, 2, 11> {}; | 4687 class DictionaryMap: public BitField<bool, 2, 1> {}; |
| 4688 class LastAddedBits: public BitField<int, 3, 11> {}; |
4688 | 4689 |
4689 // Tells whether the object in the prototype property will be used | 4690 // Tells whether the object in the prototype property will be used |
4690 // for instances created from this function. If the prototype | 4691 // for instances created from this function. If the prototype |
4691 // property is set to a value that is not a JSObject, the prototype | 4692 // property is set to a value that is not a JSObject, the prototype |
4692 // property will not be used to create instances of the function. | 4693 // property will not be used to create instances of the function. |
4693 // See ECMA-262, 13.2.2. | 4694 // See ECMA-262, 13.2.2. |
4694 inline void set_non_instance_prototype(bool value); | 4695 inline void set_non_instance_prototype(bool value); |
4695 inline bool has_non_instance_prototype(); | 4696 inline bool has_non_instance_prototype(); |
4696 | 4697 |
4697 // Tells whether function has special prototype property. If not, prototype | 4698 // Tells whether function has special prototype property. If not, prototype |
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4823 inline void set_attached_to_shared_function_info(bool value); | 4824 inline void set_attached_to_shared_function_info(bool value); |
4824 | 4825 |
4825 inline bool attached_to_shared_function_info(); | 4826 inline bool attached_to_shared_function_info(); |
4826 | 4827 |
4827 // Tells whether the map is shared between objects that may have different | 4828 // Tells whether the map is shared between objects that may have different |
4828 // behavior. If true, the map should never be modified, instead a clone | 4829 // behavior. If true, the map should never be modified, instead a clone |
4829 // should be created and modified. | 4830 // should be created and modified. |
4830 inline void set_is_shared(bool value); | 4831 inline void set_is_shared(bool value); |
4831 inline bool is_shared(); | 4832 inline bool is_shared(); |
4832 | 4833 |
| 4834 // Tells whether the map is used for JSObjects in dictionary mode (ie |
| 4835 // normalized objects, ie objects for which HasFastProperties returns false). |
| 4836 // A map can never be used for both dictionary mode and fast mode JSObjects. |
| 4837 // False by default and for HeapObjects that are not JSObjects. |
| 4838 inline void set_dictionary_map(bool value); |
| 4839 inline bool is_dictionary_map(); |
| 4840 |
4833 // Tells whether the instance needs security checks when accessing its | 4841 // Tells whether the instance needs security checks when accessing its |
4834 // properties. | 4842 // properties. |
4835 inline void set_is_access_check_needed(bool access_check_needed); | 4843 inline void set_is_access_check_needed(bool access_check_needed); |
4836 inline bool is_access_check_needed(); | 4844 inline bool is_access_check_needed(); |
4837 | 4845 |
4838 // [prototype]: implicit prototype object. | 4846 // [prototype]: implicit prototype object. |
4839 DECL_ACCESSORS(prototype, Object) | 4847 DECL_ACCESSORS(prototype, Object) |
4840 | 4848 |
4841 // [constructor]: points back to the function responsible for this map. | 4849 // [constructor]: points back to the function responsible for this map. |
4842 DECL_ACCESSORS(constructor, Object) | 4850 DECL_ACCESSORS(constructor, Object) |
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5143 static const int8_t kMaximumBitField2FastHoleyElementValue = | 5151 static const int8_t kMaximumBitField2FastHoleyElementValue = |
5144 static_cast<int8_t>((FAST_HOLEY_ELEMENTS + 1) << | 5152 static_cast<int8_t>((FAST_HOLEY_ELEMENTS + 1) << |
5145 Map::kElementsKindShift) - 1; | 5153 Map::kElementsKindShift) - 1; |
5146 static const int8_t kMaximumBitField2FastHoleySmiElementValue = | 5154 static const int8_t kMaximumBitField2FastHoleySmiElementValue = |
5147 static_cast<int8_t>((FAST_HOLEY_SMI_ELEMENTS + 1) << | 5155 static_cast<int8_t>((FAST_HOLEY_SMI_ELEMENTS + 1) << |
5148 Map::kElementsKindShift) - 1; | 5156 Map::kElementsKindShift) - 1; |
5149 | 5157 |
5150 // Bit positions for bit field 3 | 5158 // Bit positions for bit field 3 |
5151 static const int kIsShared = 0; | 5159 static const int kIsShared = 0; |
5152 static const int kFunctionWithPrototype = 1; | 5160 static const int kFunctionWithPrototype = 1; |
| 5161 static const int kDictionaryMap = 2; |
5153 | 5162 |
5154 typedef FixedBodyDescriptor<kPointerFieldsBeginOffset, | 5163 typedef FixedBodyDescriptor<kPointerFieldsBeginOffset, |
5155 kPointerFieldsEndOffset, | 5164 kPointerFieldsEndOffset, |
5156 kSize> BodyDescriptor; | 5165 kSize> BodyDescriptor; |
5157 | 5166 |
5158 private: | 5167 private: |
5159 DISALLOW_IMPLICIT_CONSTRUCTORS(Map); | 5168 DISALLOW_IMPLICIT_CONSTRUCTORS(Map); |
5160 }; | 5169 }; |
5161 | 5170 |
5162 | 5171 |
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8930 } else { | 8939 } else { |
8931 value &= ~(1 << bit_position); | 8940 value &= ~(1 << bit_position); |
8932 } | 8941 } |
8933 return value; | 8942 return value; |
8934 } | 8943 } |
8935 }; | 8944 }; |
8936 | 8945 |
8937 } } // namespace v8::internal | 8946 } } // namespace v8::internal |
8938 | 8947 |
8939 #endif // V8_OBJECTS_H_ | 8948 #endif // V8_OBJECTS_H_ |
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