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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_KEY_ACCUMULATOR_H_ | 5 #ifndef V8_KEY_ACCUMULATOR_H_ |
6 #define V8_KEY_ACCUMULATOR_H_ | 6 #define V8_KEY_ACCUMULATOR_H_ |
7 | 7 |
8 #include <set> | |
9 | |
10 #include "src/isolate.h" | 8 #include "src/isolate.h" |
11 #include "src/objects.h" | 9 #include "src/objects.h" |
12 | 10 |
13 namespace v8 { | 11 namespace v8 { |
14 namespace internal { | 12 namespace internal { |
15 | 13 |
16 enum AddKeyConversion { DO_NOT_CONVERT, CONVERT_TO_ARRAY_INDEX, PROXY_MAGIC }; | 14 enum AddKeyConversion { DO_NOT_CONVERT, CONVERT_TO_ARRAY_INDEX, PROXY_MAGIC }; |
17 | 15 |
18 // This is a helper class for JSReceiver::GetKeys which collects and sorts keys. | 16 // This is a helper class for JSReceiver::GetKeys which collects and sorts keys. |
19 // GetKeys needs to sort keys per prototype level, first showing the integer | 17 // GetKeys needs to sort keys per prototype level, first showing the integer |
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40 bool AddKey(uint32_t key); | 38 bool AddKey(uint32_t key); |
41 bool AddKey(Object* key, AddKeyConversion convert = DO_NOT_CONVERT); | 39 bool AddKey(Object* key, AddKeyConversion convert = DO_NOT_CONVERT); |
42 bool AddKey(Handle<Object> key, AddKeyConversion convert = DO_NOT_CONVERT); | 40 bool AddKey(Handle<Object> key, AddKeyConversion convert = DO_NOT_CONVERT); |
43 void AddKeys(Handle<FixedArray> array, | 41 void AddKeys(Handle<FixedArray> array, |
44 AddKeyConversion convert = DO_NOT_CONVERT); | 42 AddKeyConversion convert = DO_NOT_CONVERT); |
45 void AddKeys(Handle<JSObject> array, | 43 void AddKeys(Handle<JSObject> array, |
46 AddKeyConversion convert = DO_NOT_CONVERT); | 44 AddKeyConversion convert = DO_NOT_CONVERT); |
47 void AddKeysFromProxy(Handle<JSObject> array); | 45 void AddKeysFromProxy(Handle<JSObject> array); |
48 Maybe<bool> AddKeysFromProxy(Handle<JSProxy> proxy, Handle<FixedArray> keys); | 46 Maybe<bool> AddKeysFromProxy(Handle<JSProxy> proxy, Handle<FixedArray> keys); |
49 void AddElementKeysFromInterceptor(Handle<JSObject> array); | 47 void AddElementKeysFromInterceptor(Handle<JSObject> array); |
50 void HideKey(uint32_t key); | |
51 void HideKey(Object* key); | |
52 void HideKey(Handle<Object> key); | |
53 void Prepare(); | |
54 // Jump to the next level, pushing the current |levelLength_| to | 48 // Jump to the next level, pushing the current |levelLength_| to |
55 // |levelLengths_| and adding a new list to |elements_|. | 49 // |levelLengths_| and adding a new list to |elements_|. |
56 void NextPrototype(); | 50 void NextPrototype(); |
57 // Sort the integer indices in the last list in |elements_| | 51 // Sort the integer indices in the last list in |elements_| |
58 void SortCurrentElementsList(); | 52 void SortCurrentElementsList(); |
59 Handle<FixedArray> GetKeys(GetKeysConversion convert = KEEP_NUMBERS); | 53 Handle<FixedArray> GetKeys(GetKeysConversion convert = KEEP_NUMBERS); |
60 int length() { return length_; } | 54 int length() { return length_; } |
61 Isolate* isolate() { return isolate_; } | 55 Isolate* isolate() { return isolate_; } |
62 | 56 |
63 private: | 57 private: |
64 bool AddIntegerKey(uint32_t key); | 58 bool AddIntegerKey(uint32_t key); |
65 bool AddStringKey(Handle<Object> key, AddKeyConversion convert); | 59 bool AddStringKey(Handle<Object> key, AddKeyConversion convert); |
66 bool AddSymbolKey(Handle<Object> array); | 60 bool AddSymbolKey(Handle<Object> array); |
67 void SortCurrentElementsListRemoveDuplicates(); | 61 void SortCurrentElementsListRemoveDuplicates(); |
68 bool IsKeyHidden(Handle<Object> key); | |
69 bool IsKeyHidden(uint32_t key); | |
70 | 62 |
71 Isolate* isolate_; | 63 Isolate* isolate_; |
72 PropertyFilter filter_; | 64 PropertyFilter filter_; |
73 // |elements_| contains the sorted element keys (indices) per level. | 65 // |elements_| contains the sorted element keys (indices) per level. |
74 std::vector<std::vector<uint32_t>*> elements_; | 66 std::vector<std::vector<uint32_t>*> elements_; |
75 // |protoLengths_| contains the total number of keys (elements + properties) | 67 // |protoLengths_| contains the total number of keys (elements + properties) |
76 // per level. Negative values mark counts for a level with keys from a proxy. | 68 // per level. Negative values mark counts for a level with keys from a proxy. |
77 std::vector<int> level_lengths_; | 69 std::vector<int> level_lengths_; |
78 // |string_properties_| contains the unique String property keys for all | 70 // |string_properties_| contains the unique String property keys for all |
79 // levels in insertion order per level. | 71 // levels in insertion order per level. |
80 Handle<OrderedHashSet> string_properties_; | 72 Handle<OrderedHashSet> string_properties_; |
81 // |symbol_properties_| contains the unique Symbol property keys for all | 73 // |symbol_properties_| contains the unique Symbol property keys for all |
82 // levels in insertion order per level. | 74 // levels in insertion order per level. |
83 Handle<OrderedHashSet> symbol_properties_; | 75 Handle<OrderedHashSet> symbol_properties_; |
84 // |hidden_keys_| keeps track of the non-enumerable property keys to prevent | |
85 // them from being added to the accumulator if they reappear higher up in the | |
86 // prototype-chain. | |
87 Handle<OrderedHashSet> hidden_keys_; | |
88 std::set<uint32_t> hidden_element_keys_; | |
89 // |length_| keeps track of the total number of all element and property keys. | 76 // |length_| keeps track of the total number of all element and property keys. |
90 int length_ = 0; | 77 int length_ = 0; |
91 // |levelLength_| keeps track of the number of String keys in the current | 78 // |levelLength_| keeps track of the number of String keys in the current |
92 // level. | 79 // level. |
93 int level_string_length_ = 0; | 80 int level_string_length_ = 0; |
94 // |levelSymbolLength_| keeps track of the number of Symbol keys in the | 81 // |levelSymbolLength_| keeps track of the number of Symbol keys in the |
95 // current level. | 82 // current level. |
96 int level_symbol_length_ = 0; | 83 int level_symbol_length_ = 0; |
97 | 84 |
98 DISALLOW_COPY_AND_ASSIGN(KeyAccumulator); | 85 DISALLOW_COPY_AND_ASSIGN(KeyAccumulator); |
99 }; | 86 }; |
100 | 87 |
101 | 88 |
102 } // namespace internal | 89 } // namespace internal |
103 } // namespace v8 | 90 } // namespace v8 |
104 | 91 |
105 | 92 |
106 #endif // V8_KEY_ACCUMULATOR_H_ | 93 #endif // V8_KEY_ACCUMULATOR_H_ |
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