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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 // Review notes: | 5 // Review notes: |
6 // | 6 // |
7 // - The use of macros in these inline functions may seem superfluous | 7 // - The use of macros in these inline functions may seem superfluous |
8 // but it is absolutely needed to make sure gcc generates optimal | 8 // but it is absolutely needed to make sure gcc generates optimal |
9 // code. gcc is not happy when attempting to inline too deep. | 9 // code. gcc is not happy when attempting to inline too deep. |
10 // | 10 // |
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2108 | 2108 |
2109 | 2109 |
2110 bool JSObject::HasFastProperties() { | 2110 bool JSObject::HasFastProperties() { |
2111 ASSERT(properties()->IsDictionary() == map()->is_dictionary_map()); | 2111 ASSERT(properties()->IsDictionary() == map()->is_dictionary_map()); |
2112 return !properties()->IsDictionary(); | 2112 return !properties()->IsDictionary(); |
2113 } | 2113 } |
2114 | 2114 |
2115 | 2115 |
2116 bool Map::TooManyFastProperties(StoreFromKeyed store_mode) { | 2116 bool Map::TooManyFastProperties(StoreFromKeyed store_mode) { |
2117 if (unused_property_fields() != 0) return false; | 2117 if (unused_property_fields() != 0) return false; |
| 2118 if (is_prototype_map()) return false; |
2118 int minimum = store_mode == CERTAINLY_NOT_STORE_FROM_KEYED ? 128 : 12; | 2119 int minimum = store_mode == CERTAINLY_NOT_STORE_FROM_KEYED ? 128 : 12; |
2119 int limit = Max(minimum, inobject_properties()); | 2120 int limit = Max(minimum, inobject_properties()); |
2120 int external = NumberOfFields() - inobject_properties(); | 2121 int external = NumberOfFields() - inobject_properties(); |
2121 return external > limit; | 2122 return external > limit; |
2122 } | 2123 } |
2123 | 2124 |
2124 | 2125 |
2125 void Struct::InitializeBody(int object_size) { | 2126 void Struct::InitializeBody(int object_size) { |
2126 Object* value = GetHeap()->undefined_value(); | 2127 Object* value = GetHeap()->undefined_value(); |
2127 for (int offset = kHeaderSize; offset < object_size; offset += kPointerSize) { | 2128 for (int offset = kHeaderSize; offset < object_size; offset += kPointerSize) { |
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4438 } else { | 4439 } else { |
4439 set_bit_field2(bit_field2() & ~(1 << kIsExtensible)); | 4440 set_bit_field2(bit_field2() & ~(1 << kIsExtensible)); |
4440 } | 4441 } |
4441 } | 4442 } |
4442 | 4443 |
4443 bool Map::is_extensible() { | 4444 bool Map::is_extensible() { |
4444 return ((1 << kIsExtensible) & bit_field2()) != 0; | 4445 return ((1 << kIsExtensible) & bit_field2()) != 0; |
4445 } | 4446 } |
4446 | 4447 |
4447 | 4448 |
| 4449 void Map::mark_prototype_map() { |
| 4450 set_bit_field2(IsPrototypeMapBits::update(bit_field2(), true)); |
| 4451 } |
| 4452 |
| 4453 bool Map::is_prototype_map() { |
| 4454 return IsPrototypeMapBits::decode(bit_field2()); |
| 4455 } |
| 4456 |
| 4457 |
4448 void Map::set_is_shared(bool value) { | 4458 void Map::set_is_shared(bool value) { |
4449 set_bit_field3(IsShared::update(bit_field3(), value)); | 4459 set_bit_field3(IsShared::update(bit_field3(), value)); |
4450 } | 4460 } |
4451 | 4461 |
4452 | 4462 |
4453 bool Map::is_shared() { | 4463 bool Map::is_shared() { |
4454 return IsShared::decode(bit_field3()); } | 4464 return IsShared::decode(bit_field3()); } |
4455 | 4465 |
4456 | 4466 |
4457 void Map::set_dictionary_map(bool value) { | 4467 void Map::set_dictionary_map(bool value) { |
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7259 #undef READ_SHORT_FIELD | 7269 #undef READ_SHORT_FIELD |
7260 #undef WRITE_SHORT_FIELD | 7270 #undef WRITE_SHORT_FIELD |
7261 #undef READ_BYTE_FIELD | 7271 #undef READ_BYTE_FIELD |
7262 #undef WRITE_BYTE_FIELD | 7272 #undef WRITE_BYTE_FIELD |
7263 #undef NOBARRIER_READ_BYTE_FIELD | 7273 #undef NOBARRIER_READ_BYTE_FIELD |
7264 #undef NOBARRIER_WRITE_BYTE_FIELD | 7274 #undef NOBARRIER_WRITE_BYTE_FIELD |
7265 | 7275 |
7266 } } // namespace v8::internal | 7276 } } // namespace v8::internal |
7267 | 7277 |
7268 #endif // V8_OBJECTS_INL_H_ | 7278 #endif // V8_OBJECTS_INL_H_ |
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