blob: 32c799c900c004dd13a9b447a792724b0c967666 [file] [log] [blame]
// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_SCRIPT_V8C_V8C_HEAP_TRACER_H_
#define COBALT_SCRIPT_V8C_V8C_HEAP_TRACER_H_
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include "cobalt/script/v8c/isolate_fellowship.h"
#include "cobalt/script/v8c/scoped_persistent.h"
#include "cobalt/script/wrappable.h"
#include "v8/include/v8-platform.h"
#include "v8/include/v8.h"
namespace cobalt {
namespace script {
namespace v8c {
class V8cHeapTracer final : public v8::EmbedderHeapTracer,
public ::cobalt::script::Tracer {
public:
explicit V8cHeapTracer(v8::Isolate* isolate) : isolate_(isolate) {}
void RegisterV8References(
const std::vector<std::pair<void*, void*>>& embedder_fields) override;
void TracePrologue() override;
bool AdvanceTracing(double deadline_in_ms,
AdvanceTracingActions actions) override;
void TraceEpilogue() override;
void EnterFinalPause() override;
void AbortTracing() override;
size_t NumberOfWrappersToTrace() override;
void Trace(Traceable* traceable) override;
void AddReferencedObject(Wrappable* owner,
ScopedPersistent<v8::Value>* value);
void RemoveReferencedObject(Wrappable* owner,
ScopedPersistent<v8::Value>* value);
private:
void MaybeAddToFrontier(Traceable* traceable);
v8::Isolate* const isolate_;
v8::Platform* const platform_ = IsolateFellowship::GetInstance()->platform;
std::vector<Traceable*> frontier_;
std::unordered_set<Traceable*> visited_;
std::unordered_multimap<Wrappable*, ScopedPersistent<v8::Value>*>
reference_map_;
};
} // namespace v8c
} // namespace script
} // namespace cobalt
#endif // COBALT_SCRIPT_V8C_V8C_HEAP_TRACER_H_