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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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1883 | 1883 |
1884 if (descriptors->elements_transition_map() != NULL) { | 1884 if (descriptors->elements_transition_map() != NULL) { |
1885 Object** transitions_slot = descriptors->GetTransitionsSlot(); | 1885 Object** transitions_slot = descriptors->GetTransitionsSlot(); |
1886 Object* transitions = *transitions_slot; | 1886 Object* transitions = *transitions_slot; |
1887 mark_compact_collector()->RecordSlot(descriptor_start, | 1887 mark_compact_collector()->RecordSlot(descriptor_start, |
1888 transitions_slot, | 1888 transitions_slot, |
1889 transitions); | 1889 transitions); |
1890 } | 1890 } |
1891 | 1891 |
1892 // If the descriptor contains a transition (value is a Map), we don't mark the | 1892 // If the descriptor contains a transition (value is a Map), we don't mark the |
1893 // value as live. It might be set to the NULL_DESCRIPTOR in | 1893 // value as live. It might be removed by ClearNonLiveTransitions later. |
1894 // ClearNonLiveTransitions later. | |
1895 for (int i = 0; i < descriptors->number_of_descriptors(); ++i) { | 1894 for (int i = 0; i < descriptors->number_of_descriptors(); ++i) { |
1896 Object** key_slot = descriptors->GetKeySlot(i); | 1895 Object** key_slot = descriptors->GetKeySlot(i); |
1897 Object* key = *key_slot; | 1896 Object* key = *key_slot; |
1898 if (key->IsHeapObject()) { | 1897 if (key->IsHeapObject()) { |
1899 base_marker()->MarkObjectAndPush(reinterpret_cast<HeapObject*>(key)); | 1898 base_marker()->MarkObjectAndPush(reinterpret_cast<HeapObject*>(key)); |
1900 mark_compact_collector()->RecordSlot(descriptor_start, key_slot, key); | 1899 mark_compact_collector()->RecordSlot(descriptor_start, key_slot, key); |
1901 } | 1900 } |
1902 | 1901 |
1903 Object** value_slot = descriptors->GetValueSlot(i); | 1902 Object** value_slot = descriptors->GetValueSlot(i); |
1904 if (!(*value_slot)->IsHeapObject()) continue; | 1903 if (!(*value_slot)->IsHeapObject()) continue; |
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1922 if (!value->IsAccessorPair()) { | 1921 if (!value->IsAccessorPair()) { |
1923 base_marker()->MarkObjectAndPush(value); | 1922 base_marker()->MarkObjectAndPush(value); |
1924 } else if (base_marker()->MarkObjectWithoutPush(value)) { | 1923 } else if (base_marker()->MarkObjectWithoutPush(value)) { |
1925 AccessorPair* accessors = AccessorPair::cast(value); | 1924 AccessorPair* accessors = AccessorPair::cast(value); |
1926 MarkAccessorPairSlot(accessors, AccessorPair::kGetterOffset); | 1925 MarkAccessorPairSlot(accessors, AccessorPair::kGetterOffset); |
1927 MarkAccessorPairSlot(accessors, AccessorPair::kSetterOffset); | 1926 MarkAccessorPairSlot(accessors, AccessorPair::kSetterOffset); |
1928 } | 1927 } |
1929 break; | 1928 break; |
1930 case MAP_TRANSITION: | 1929 case MAP_TRANSITION: |
1931 case CONSTANT_TRANSITION: | 1930 case CONSTANT_TRANSITION: |
1932 case NULL_DESCRIPTOR: | 1931 break; |
| 1932 case NONEXISTENT: |
| 1933 UNREACHABLE(); |
1933 break; | 1934 break; |
1934 } | 1935 } |
1935 } | 1936 } |
1936 } | 1937 } |
1937 | 1938 |
1938 | 1939 |
1939 template <class T> | 1940 template <class T> |
1940 void Marker<T>::MarkAccessorPairSlot(AccessorPair* accessors, int offset) { | 1941 void Marker<T>::MarkAccessorPairSlot(AccessorPair* accessors, int offset) { |
1941 Object** slot = HeapObject::RawField(accessors, offset); | 1942 Object** slot = HeapObject::RawField(accessors, offset); |
1942 HeapObject* accessor = HeapObject::cast(*slot); | 1943 HeapObject* accessor = HeapObject::cast(*slot); |
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4119 while (buffer != NULL) { | 4120 while (buffer != NULL) { |
4120 SlotsBuffer* next_buffer = buffer->next(); | 4121 SlotsBuffer* next_buffer = buffer->next(); |
4121 DeallocateBuffer(buffer); | 4122 DeallocateBuffer(buffer); |
4122 buffer = next_buffer; | 4123 buffer = next_buffer; |
4123 } | 4124 } |
4124 *buffer_address = NULL; | 4125 *buffer_address = NULL; |
4125 } | 4126 } |
4126 | 4127 |
4127 | 4128 |
4128 } } // namespace v8::internal | 4129 } } // namespace v8::internal |
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