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// 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 ReconstructReadOnlyObjectCacheForTesting();
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_
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