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1 // Copyright 2016 the V8 project authors. All rights reserved. | 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 | 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 #ifndef V8_SNAPSHOT_DESERIALIZER_H_ | 5 #ifndef V8_SNAPSHOT_DESERIALIZER_H_ |
6 #define V8_SNAPSHOT_DESERIALIZER_H_ | 6 #define V8_SNAPSHOT_DESERIALIZER_H_ |
7 | 7 |
8 #include "src/heap/heap.h" | 8 #include "src/heap/heap.h" |
9 #include "src/objects.h" | 9 #include "src/objects.h" |
10 #include "src/snapshot/serializer-common.h" | 10 #include "src/snapshot/serializer-common.h" |
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27 | 27 |
28 // A Deserializer reads a snapshot and reconstructs the Object graph it defines. | 28 // A Deserializer reads a snapshot and reconstructs the Object graph it defines. |
29 class Deserializer : public SerializerDeserializer { | 29 class Deserializer : public SerializerDeserializer { |
30 public: | 30 public: |
31 // Create a deserializer from a snapshot byte source. | 31 // Create a deserializer from a snapshot byte source. |
32 template <class Data> | 32 template <class Data> |
33 explicit Deserializer(Data* data, bool deserializing_user_code = false) | 33 explicit Deserializer(Data* data, bool deserializing_user_code = false) |
34 : isolate_(NULL), | 34 : isolate_(NULL), |
35 source_(data->Payload()), | 35 source_(data->Payload()), |
36 magic_number_(data->GetMagicNumber()), | 36 magic_number_(data->GetMagicNumber()), |
| 37 num_extra_references_(data->GetExtraReferences()), |
37 next_map_index_(0), | 38 next_map_index_(0), |
38 external_reference_table_(NULL), | 39 external_reference_table_(NULL), |
39 deserialized_large_objects_(0), | 40 deserialized_large_objects_(0), |
40 deserializing_user_code_(deserializing_user_code), | 41 deserializing_user_code_(deserializing_user_code), |
41 next_alignment_(kWordAligned) { | 42 next_alignment_(kWordAligned) { |
42 DecodeReservation(data->Reservations()); | 43 DecodeReservation(data->Reservations()); |
43 } | 44 } |
44 | 45 |
45 ~Deserializer() override; | 46 ~Deserializer() override; |
46 | 47 |
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118 Object** current); | 119 Object** current); |
119 | 120 |
120 // Cached current isolate. | 121 // Cached current isolate. |
121 Isolate* isolate_; | 122 Isolate* isolate_; |
122 | 123 |
123 // Objects from the attached object descriptions in the serialized user code. | 124 // Objects from the attached object descriptions in the serialized user code. |
124 List<Handle<HeapObject> > attached_objects_; | 125 List<Handle<HeapObject> > attached_objects_; |
125 | 126 |
126 SnapshotByteSource source_; | 127 SnapshotByteSource source_; |
127 uint32_t magic_number_; | 128 uint32_t magic_number_; |
| 129 uint32_t num_extra_references_; |
128 | 130 |
129 // The address of the next object that will be allocated in each space. | 131 // The address of the next object that will be allocated in each space. |
130 // Each space has a number of chunks reserved by the GC, with each chunk | 132 // Each space has a number of chunks reserved by the GC, with each chunk |
131 // fitting into a page. Deserialized objects are allocated into the | 133 // fitting into a page. Deserialized objects are allocated into the |
132 // current chunk of the target space by bumping up high water mark. | 134 // current chunk of the target space by bumping up high water mark. |
133 Heap::Reservation reservations_[kNumberOfSpaces]; | 135 Heap::Reservation reservations_[kNumberOfSpaces]; |
134 uint32_t current_chunk_[kNumberOfPreallocatedSpaces]; | 136 uint32_t current_chunk_[kNumberOfPreallocatedSpaces]; |
135 Address high_water_[kNumberOfPreallocatedSpaces]; | 137 Address high_water_[kNumberOfPreallocatedSpaces]; |
136 int next_map_index_; | 138 int next_map_index_; |
137 List<Address> allocated_maps_; | 139 List<Address> allocated_maps_; |
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148 | 150 |
149 AllocationAlignment next_alignment_; | 151 AllocationAlignment next_alignment_; |
150 | 152 |
151 DISALLOW_COPY_AND_ASSIGN(Deserializer); | 153 DISALLOW_COPY_AND_ASSIGN(Deserializer); |
152 }; | 154 }; |
153 | 155 |
154 } // namespace internal | 156 } // namespace internal |
155 } // namespace v8 | 157 } // namespace v8 |
156 | 158 |
157 #endif // V8_SNAPSHOT_DESERIALIZER_H_ | 159 #endif // V8_SNAPSHOT_DESERIALIZER_H_ |
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