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| 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 DISALLOW_COPY_AND_ASSIGN(PartialSerializer); |
| 56 }; |
| 57 |
| 58 } // namespace internal |
| 59 } // namespace v8 |
| 60 |
| 61 #endif // V8_SNAPSHOT_PARTIAL_SERIALIZER_H_ |
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