96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_GC_COLLECTOR_IMMUNE_SPACES_H_
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#define ART_RUNTIME_GC_COLLECTOR_IMMUNE_SPACES_H_
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#include "base/locks.h"
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#include "base/macros.h"
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#include "gc/space/space.h"
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#include "immune_region.h"
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#include <set>
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namespace art {
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namespace gc {
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namespace space {
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class ContinuousSpace;
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} // namespace space
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namespace collector {
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// ImmuneSpaces is a set of spaces which are not going to have any objects become marked during the
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// GC.
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class ImmuneSpaces {
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class CompareByBegin {
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public:
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bool operator()(space::ContinuousSpace* a, space::ContinuousSpace* b) const;
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};
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public:
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ImmuneSpaces() {}
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void Reset();
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// Add a continuous space to the immune spaces set.
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void AddSpace(space::ContinuousSpace* space) REQUIRES(Locks::heap_bitmap_lock_);
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// Returns true if an object is inside of the immune region (assumed to be marked). Only returns
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// true for the largest immune region. The object can still be inside of an immune space.
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ALWAYS_INLINE bool IsInImmuneRegion(const mirror::Object* obj) const {
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return largest_immune_region_.ContainsObject(obj);
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}
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// Return true if the spaces is contained.
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bool ContainsSpace(space::ContinuousSpace* space) const;
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// Return the set of spaces in the immune region.
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const std::set<space::ContinuousSpace*, CompareByBegin>& GetSpaces() {
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return spaces_;
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}
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// Return the associated largest immune region.
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const ImmuneRegion& GetLargestImmuneRegion() const {
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return largest_immune_region_;
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}
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// Return true if the object is contained by any of the immune space.s
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ALWAYS_INLINE bool ContainsObject(const mirror::Object* obj) const {
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if (largest_immune_region_.ContainsObject(obj)) {
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return true;
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}
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for (space::ContinuousSpace* space : spaces_) {
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if (space->HasAddress(obj)) {
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return true;
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}
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}
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return false;
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}
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private:
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// Setup the immune region to the largest continuous set of immune spaces. The immune region is
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// just the for the fast path lookup.
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void CreateLargestImmuneRegion();
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std::set<space::ContinuousSpace*, CompareByBegin> spaces_;
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ImmuneRegion largest_immune_region_;
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};
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} // namespace collector
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} // namespace gc
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} // namespace art
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#endif // ART_RUNTIME_GC_COLLECTOR_IMMUNE_SPACES_H_
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