OLD | NEW |
1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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 |
(...skipping 2093 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
2104 return READ_BYTE_FIELD(this, kInObjectPropertiesOffset); | 2104 return READ_BYTE_FIELD(this, kInObjectPropertiesOffset); |
2105 } | 2105 } |
2106 | 2106 |
2107 | 2107 |
2108 int Map::pre_allocated_property_fields() { | 2108 int Map::pre_allocated_property_fields() { |
2109 return READ_BYTE_FIELD(this, kPreAllocatedPropertyFieldsOffset); | 2109 return READ_BYTE_FIELD(this, kPreAllocatedPropertyFieldsOffset); |
2110 } | 2110 } |
2111 | 2111 |
2112 | 2112 |
2113 int HeapObject::SizeFromMap(Map* map) { | 2113 int HeapObject::SizeFromMap(Map* map) { |
2114 InstanceType instance_type = map->instance_type(); | 2114 int instance_size = map->instance_size(); |
| 2115 if (instance_size != kVariableSizeSentinel) return instance_size; |
| 2116 // We can ignore the "symbol" bit becase it is only set for symbols |
| 2117 // and implies a string type. |
| 2118 int instance_type = static_cast<int>(map->instance_type()) & ~kIsSymbolMask; |
2115 // Only inline the most frequent cases. | 2119 // Only inline the most frequent cases. |
2116 if (instance_type == JS_OBJECT_TYPE || | |
2117 (instance_type & (kIsNotStringMask | kStringRepresentationMask)) == | |
2118 (kStringTag | kConsStringTag) || | |
2119 instance_type == JS_ARRAY_TYPE) return map->instance_size(); | |
2120 if (instance_type == FIXED_ARRAY_TYPE) { | 2120 if (instance_type == FIXED_ARRAY_TYPE) { |
2121 return FixedArray::BodyDescriptor::SizeOf(map, this); | 2121 return FixedArray::BodyDescriptor::SizeOf(map, this); |
2122 } | 2122 } |
| 2123 if (instance_type == ASCII_STRING_TYPE) { |
| 2124 return SeqAsciiString::SizeFor( |
| 2125 reinterpret_cast<SeqAsciiString*>(this)->length()); |
| 2126 } |
2123 if (instance_type == BYTE_ARRAY_TYPE) { | 2127 if (instance_type == BYTE_ARRAY_TYPE) { |
2124 return reinterpret_cast<ByteArray*>(this)->ByteArraySize(); | 2128 return reinterpret_cast<ByteArray*>(this)->ByteArraySize(); |
2125 } | 2129 } |
2126 // Otherwise do the general size computation. | 2130 if (instance_type == STRING_TYPE) { |
2127 return SlowSizeFromMap(map); | 2131 return SeqTwoByteString::SizeFor( |
| 2132 reinterpret_cast<SeqTwoByteString*>(this)->length()); |
| 2133 } |
| 2134 ASSERT(instance_type == CODE_TYPE); |
| 2135 return reinterpret_cast<Code*>(this)->CodeSize(); |
2128 } | 2136 } |
2129 | 2137 |
2130 | 2138 |
2131 void Map::set_instance_size(int value) { | 2139 void Map::set_instance_size(int value) { |
2132 ASSERT_EQ(0, value & (kPointerSize - 1)); | 2140 ASSERT_EQ(0, value & (kPointerSize - 1)); |
2133 value >>= kPointerSizeLog2; | 2141 value >>= kPointerSizeLog2; |
2134 ASSERT(0 <= value && value < 256); | 2142 ASSERT(0 <= value && value < 256); |
2135 WRITE_BYTE_FIELD(this, kInstanceSizeOffset, static_cast<byte>(value)); | 2143 WRITE_BYTE_FIELD(this, kInstanceSizeOffset, static_cast<byte>(value)); |
2136 } | 2144 } |
2137 | 2145 |
(...skipping 1311 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
3449 #undef WRITE_INT_FIELD | 3457 #undef WRITE_INT_FIELD |
3450 #undef READ_SHORT_FIELD | 3458 #undef READ_SHORT_FIELD |
3451 #undef WRITE_SHORT_FIELD | 3459 #undef WRITE_SHORT_FIELD |
3452 #undef READ_BYTE_FIELD | 3460 #undef READ_BYTE_FIELD |
3453 #undef WRITE_BYTE_FIELD | 3461 #undef WRITE_BYTE_FIELD |
3454 | 3462 |
3455 | 3463 |
3456 } } // namespace v8::internal | 3464 } } // namespace v8::internal |
3457 | 3465 |
3458 #endif // V8_OBJECTS_INL_H_ | 3466 #endif // V8_OBJECTS_INL_H_ |
OLD | NEW |