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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // modification, are permitted provided that the following conditions are | 3 // found in the LICENSE file. |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | 4 |
| 28 #ifndef V8_PROPERTY_H_ | 5 #ifndef V8_PROPERTY_H_ |
| 29 #define V8_PROPERTY_H_ | 6 #define V8_PROPERTY_H_ |
| 30 | 7 |
| 31 #include "allocation.h" | 8 #include "isolate.h" |
| 32 #include "transitions.h" | |
| 33 | 9 |
| 34 namespace v8 { | 10 namespace v8 { |
| 35 namespace internal { | 11 namespace internal { |
| 36 | 12 |
| 37 | |
| 38 // Abstraction for elements in instance-descriptor arrays. | 13 // Abstraction for elements in instance-descriptor arrays. |
| 39 // | 14 // |
| 40 // Each descriptor has a key, property attributes, property type, | 15 // Each descriptor has a key, property attributes, property type, |
| 41 // property index (in the actual instance-descriptor array) and | 16 // property index (in the actual instance-descriptor array) and |
| 42 // optionally a piece of data. | 17 // optionally a piece of data. |
| 43 // | |
| 44 | |
| 45 class Descriptor BASE_EMBEDDED { | 18 class Descriptor BASE_EMBEDDED { |
| 46 public: | 19 public: |
| 47 MUST_USE_RESULT MaybeObject* KeyToUniqueName() { | 20 MUST_USE_RESULT MaybeObject* KeyToUniqueName() { |
| 48 if (!key_->IsUniqueName()) { | 21 if (!key_->IsUniqueName()) { |
| 49 MaybeObject* maybe_result = | 22 MaybeObject* maybe_result = |
| 50 key_->GetIsolate()->heap()->InternalizeString(String::cast(key_)); | 23 key_->GetIsolate()->heap()->InternalizeString(String::cast(key_)); |
| 51 if (!maybe_result->To(&key_)) return maybe_result; | 24 if (!maybe_result->To(&key_)) return maybe_result; |
| 52 } | 25 } |
| 53 return key_; | 26 return key_; |
| 54 } | 27 } |
| (...skipping 34 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 89 Representation representation, | 62 Representation representation, |
| 90 int field_index = 0) | 63 int field_index = 0) |
| 91 : key_(key), | 64 : key_(key), |
| 92 value_(value), | 65 value_(value), |
| 93 details_(attributes, type, representation, field_index) { } | 66 details_(attributes, type, representation, field_index) { } |
| 94 | 67 |
| 95 friend class DescriptorArray; | 68 friend class DescriptorArray; |
| 96 }; | 69 }; |
| 97 | 70 |
| 98 | 71 |
| 99 class FieldDescriptor: public Descriptor { | 72 class FieldDescriptor V8_FINAL : public Descriptor { |
| 100 public: | 73 public: |
| 101 FieldDescriptor(Name* key, | 74 FieldDescriptor(Name* key, |
| 102 int field_index, | 75 int field_index, |
| 103 PropertyAttributes attributes, | 76 PropertyAttributes attributes, |
| 104 Representation representation) | 77 Representation representation) |
| 105 : Descriptor(key, Smi::FromInt(0), attributes, | 78 : Descriptor(key, Smi::FromInt(0), attributes, |
| 106 FIELD, representation, field_index) {} | 79 FIELD, representation, field_index) {} |
| 107 }; | 80 }; |
| 108 | 81 |
| 109 | 82 |
| 110 class ConstantDescriptor: public Descriptor { | 83 class ConstantDescriptor V8_FINAL : public Descriptor { |
| 111 public: | 84 public: |
| 112 ConstantDescriptor(Name* key, | 85 ConstantDescriptor(Name* key, |
| 113 Object* value, | 86 Object* value, |
| 114 PropertyAttributes attributes) | 87 PropertyAttributes attributes) |
| 115 : Descriptor(key, value, attributes, CONSTANT, | 88 : Descriptor(key, value, attributes, CONSTANT, |
| 116 value->OptimalRepresentation()) {} | 89 value->OptimalRepresentation()) {} |
| 117 }; | 90 }; |
| 118 | 91 |
| 119 | 92 |
| 120 class CallbacksDescriptor: public Descriptor { | 93 class CallbacksDescriptor V8_FINAL : public Descriptor { |
| 121 public: | 94 public: |
| 122 CallbacksDescriptor(Name* key, | 95 CallbacksDescriptor(Name* key, |
| 123 Object* foreign, | 96 Object* foreign, |
| 124 PropertyAttributes attributes) | 97 PropertyAttributes attributes) |
| 125 : Descriptor(key, foreign, attributes, CALLBACKS, | 98 : Descriptor(key, foreign, attributes, CALLBACKS, |
| 126 Representation::Tagged()) {} | 99 Representation::Tagged()) {} |
| 127 }; | 100 }; |
| 128 | 101 |
| 129 | 102 |
| 130 // Holds a property index value distinguishing if it is a field index or an | 103 // Holds a property index value distinguishing if it is a field index or an |
| 131 // index inside the object header. | 104 // index inside the object header. |
| 132 class PropertyIndex { | 105 class PropertyIndex V8_FINAL { |
| 133 public: | 106 public: |
| 134 static PropertyIndex NewFieldIndex(int index) { | 107 static PropertyIndex NewFieldIndex(int index) { |
| 135 return PropertyIndex(index, false); | 108 return PropertyIndex(index, false); |
| 136 } | 109 } |
| 137 static PropertyIndex NewHeaderIndex(int index) { | 110 static PropertyIndex NewHeaderIndex(int index) { |
| 138 return PropertyIndex(index, true); | 111 return PropertyIndex(index, true); |
| 139 } | 112 } |
| 140 | 113 |
| 141 bool is_field_index() { return (index_ & kHeaderIndexBit) == 0; } | 114 bool is_field_index() { return (index_ & kHeaderIndexBit) == 0; } |
| 142 bool is_header_index() { return (index_ & kHeaderIndexBit) != 0; } | 115 bool is_header_index() { return (index_ & kHeaderIndexBit) != 0; } |
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| 170 | 143 |
| 171 PropertyIndex(int index, bool is_header_based) | 144 PropertyIndex(int index, bool is_header_based) |
| 172 : index_(index | (is_header_based ? kHeaderIndexBit : 0)) { | 145 : index_(index | (is_header_based ? kHeaderIndexBit : 0)) { |
| 173 ASSERT(index <= kIndexMask); | 146 ASSERT(index <= kIndexMask); |
| 174 } | 147 } |
| 175 | 148 |
| 176 int index_; | 149 int index_; |
| 177 }; | 150 }; |
| 178 | 151 |
| 179 | 152 |
| 180 class LookupResult BASE_EMBEDDED { | 153 class LookupResult V8_FINAL BASE_EMBEDDED { |
| 181 public: | 154 public: |
| 182 explicit LookupResult(Isolate* isolate) | 155 explicit LookupResult(Isolate* isolate) |
| 183 : isolate_(isolate), | 156 : isolate_(isolate), |
| 184 next_(isolate->top_lookup_result()), | 157 next_(isolate->top_lookup_result()), |
| 185 lookup_type_(NOT_FOUND), | 158 lookup_type_(NOT_FOUND), |
| 186 holder_(NULL), | 159 holder_(NULL), |
| 187 transition_(NULL), | 160 transition_(NULL), |
| 188 cacheable_(true), | 161 cacheable_(true), |
| 189 details_(NONE, NONEXISTENT, Representation::None()) { | 162 details_(NONE, NONEXISTENT, Representation::None()) { |
| 190 isolate->set_top_lookup_result(this); | 163 isolate->set_top_lookup_result(this); |
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| 481 INTERCEPTOR_TYPE | 454 INTERCEPTOR_TYPE |
| 482 } lookup_type_; | 455 } lookup_type_; |
| 483 | 456 |
| 484 JSReceiver* holder_; | 457 JSReceiver* holder_; |
| 485 Map* transition_; | 458 Map* transition_; |
| 486 int number_; | 459 int number_; |
| 487 bool cacheable_; | 460 bool cacheable_; |
| 488 PropertyDetails details_; | 461 PropertyDetails details_; |
| 489 }; | 462 }; |
| 490 | 463 |
| 491 | |
| 492 } } // namespace v8::internal | 464 } } // namespace v8::internal |
| 493 | 465 |
| 494 #endif // V8_PROPERTY_H_ | 466 #endif // V8_PROPERTY_H_ |
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