// Copyright 2018 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_SNAPSHOT_READ_ONLY_SERIALIZER_H_ #define V8_SNAPSHOT_READ_ONLY_SERIALIZER_H_ #include <unordered_set> #include "src/base/hashmap.h" #include "src/snapshot/roots-serializer.h" namespace v8 { namespace internal { class HeapObject; class SnapshotByteSink; class V8_EXPORT_PRIVATE ReadOnlySerializer : public RootsSerializer { public: ReadOnlySerializer(Isolate* isolate, Snapshot::SerializerFlags flags); ~ReadOnlySerializer() override; ReadOnlySerializer(const ReadOnlySerializer&) = delete; ReadOnlySerializer& operator=(const ReadOnlySerializer&) = delete; void SerializeReadOnlyRoots(); // Completes the serialization of the read-only object cache and serializes // any deferred objects. void FinalizeSerialization(); // If |obj| can be serialized in the read-only snapshot then add it to the // read-only object cache if not already present and emit a // ReadOnlyObjectCache bytecode into |sink|. Returns whether this was // successful. bool SerializeUsingReadOnlyObjectCache(SnapshotByteSink* sink, Handle<HeapObject> obj); private: void SerializeObjectImpl(Handle<HeapObject> o) override; bool MustBeDeferred(HeapObject object) override; #ifdef DEBUG IdentityMap<int, base::DefaultAllocationPolicy> serialized_objects_; bool did_serialize_not_mapped_symbol_; #endif }; } // namespace internal } // namespace v8 #endif // V8_SNAPSHOT_READ_ONLY_SERIALIZER_H_