Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_SNAPSHOT_PARTIAL_SERIALIZER_H_ |
| 6 | #define V8_SNAPSHOT_PARTIAL_SERIALIZER_H_ |
| 7 | |
| 8 | #include "src/address-map.h" |
| 9 | #include "src/snapshot/serializer.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | class PartialSerializer : public Serializer { |
| 15 | public: |
| 16 | PartialSerializer(Isolate* isolate, Serializer* startup_snapshot_serializer, |
| 17 | SnapshotByteSink* sink); |
| 18 | |
| 19 | ~PartialSerializer() override; |
| 20 | |
| 21 | // Serialize the objects reachable from a single object pointer. |
| 22 | void Serialize(Object** o); |
| 23 | |
| 24 | private: |
| 25 | class PartialCacheIndexMap : public AddressMapBase { |
| 26 | public: |
| 27 | PartialCacheIndexMap() : map_(HashMap::PointersMatch) {} |
| 28 | |
| 29 | static const int kInvalidIndex = -1; |
| 30 | |
| 31 | // Lookup object in the map. Return its index if found, or create |
| 32 | // a new entry with new_index as value, and return kInvalidIndex. |
| 33 | int LookupOrInsert(HeapObject* obj, int new_index) { |
| 34 | HashMap::Entry* entry = LookupEntry(&map_, obj, false); |
| 35 | if (entry != NULL) return GetValue(entry); |
| 36 | SetValue(LookupEntry(&map_, obj, true), static_cast<uint32_t>(new_index)); |
| 37 | return kInvalidIndex; |
| 38 | } |
| 39 | |
| 40 | private: |
| 41 | HashMap map_; |
| 42 | |
| 43 | DISALLOW_COPY_AND_ASSIGN(PartialCacheIndexMap); |
| 44 | }; |
| 45 | |
| 46 | void SerializeObject(HeapObject* o, HowToCode how_to_code, |
| 47 | WhereToPoint where_to_point, int skip) override; |
| 48 | |
| 49 | int PartialSnapshotCacheIndex(HeapObject* o); |
| 50 | bool ShouldBeInThePartialSnapshotCache(HeapObject* o); |
| 51 | |
| 52 | Serializer* startup_serializer_; |
| 53 | Object* global_object_; |
| 54 | PartialCacheIndexMap partial_cache_index_map_; |
| 55 | int next_partial_cache_index_; |
| 56 | DISALLOW_COPY_AND_ASSIGN(PartialSerializer); |
| 57 | }; |
| 58 | |
| 59 | } // namespace internal |
| 60 | } // namespace v8 |
| 61 | |
| 62 | #endif // V8_SNAPSHOT_PARTIAL_SERIALIZER_H_ |