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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 ART_RUNTIME_GC_COLLECTOR_GARBAGE_COLLECTOR_H_
#define ART_RUNTIME_GC_COLLECTOR_GARBAGE_COLLECTOR_H_
#include "gc_type.h"
#include "locks.h"
#include "base/timing_logger.h"
#include <stdint.h>
#include <vector>
namespace art {
namespace gc {
class Heap;
namespace collector {
class GarbageCollector {
public:
// Returns true iff the garbage collector is concurrent.
virtual bool IsConcurrent() const = 0;
GarbageCollector(Heap* heap, const std::string& name);
virtual ~GarbageCollector() { }
const char* GetName() const {
return name_.c_str();
}
virtual GcType GetGcType() const = 0;
// Run the garbage collector.
void Run();
Heap* GetHeap() const {
return heap_;
}
// Returns how long the mutators were paused in nanoseconds.
const std::vector<uint64_t>& GetPauseTimes() const {
return pause_times_;
}
// Returns how long the GC took to complete in nanoseconds.
uint64_t GetDurationNs() const {
return duration_ns_;
}
void RegisterPause(uint64_t nano_length);
base::NewTimingLogger& GetTimings() {
return timings_;
}
CumulativeLogger& GetCumulativeTimings() {
return cumulative_timings_;
}
void ResetCumulativeStatistics();
// Swap the live and mark bitmaps of spaces that are active for the collector. For partial GC,
// this is the allocation space, for full GC then we swap the zygote bitmaps too.
void SwapBitmaps() EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_);
protected:
// The initial phase. Done without mutators paused.
virtual void InitializePhase() = 0;
// Mark all reachable objects, done concurrently.
virtual void MarkingPhase() = 0;
// Only called for concurrent GCs. Gets called repeatedly until it succeeds.
virtual bool HandleDirtyObjectsPhase() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Called with mutators running.
virtual void ReclaimPhase() = 0;
// Called after the GC is finished. Done without mutators paused.
virtual void FinishPhase() = 0;
Heap* const heap_;
std::string name_;
const bool verbose_;
uint64_t duration_ns_;
base::NewTimingLogger timings_;
// Cumulative statistics.
uint64_t total_time_ns_;
uint64_t total_paused_time_ns_;
uint64_t total_freed_objects_;
uint64_t total_freed_bytes_;
CumulativeLogger cumulative_timings_;
std::vector<uint64_t> pause_times_;
};
} // namespace collector
} // namespace gc
} // namespace art
#endif // ART_RUNTIME_GC_COLLECTOR_GARBAGE_COLLECTOR_H_
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