author | naoto |
Tue, 09 Jul 2019 08:05:38 -0700 | |
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parent 53244 | 9807daeb47c4 |
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/* |
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* Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_GC_G1_G1CONCURRENTMARKBITMAP_HPP |
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#define SHARE_GC_G1_G1CONCURRENTMARKBITMAP_HPP |
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#include "gc/g1/g1RegionToSpaceMapper.hpp" |
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#include "gc/shared/markBitMap.hpp" |
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#include "memory/memRegion.hpp" |
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#include "oops/oopsHierarchy.hpp" |
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#include "utilities/bitMap.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/macros.hpp" |
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class G1CMBitMap; |
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class G1CMTask; |
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class G1ConcurrentMark; |
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class HeapRegion; |
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// Closure for iteration over bitmaps |
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class G1CMBitMapClosure { |
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G1ConcurrentMark* const _cm; |
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G1CMTask* const _task; |
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public: |
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G1CMBitMapClosure(G1CMTask *task, G1ConcurrentMark* cm) : _cm(cm), _task(task) { } |
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bool do_addr(HeapWord* const addr); |
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}; |
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class G1CMBitMapMappingChangedListener : public G1MappingChangedListener { |
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G1CMBitMap* _bm; |
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public: |
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G1CMBitMapMappingChangedListener() : _bm(NULL) {} |
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void set_bitmap(G1CMBitMap* bm) { _bm = bm; } |
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virtual void on_commit(uint start_idx, size_t num_regions, bool zero_filled); |
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}; |
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// A generic mark bitmap for concurrent marking. This is essentially a wrapper |
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// around the BitMap class that is based on HeapWords, with one bit per (1 << _shifter) HeapWords. |
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class G1CMBitMap : public MarkBitMap { |
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G1CMBitMapMappingChangedListener _listener; |
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protected: |
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virtual void check_mark(HeapWord* addr) NOT_DEBUG_RETURN; |
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public: |
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G1CMBitMap() : MarkBitMap(), _listener() { _listener.set_bitmap(this); } |
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// Initializes the underlying BitMap to cover the given area. |
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void initialize(MemRegion heap, G1RegionToSpaceMapper* storage); |
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// Apply the closure to the addresses that correspond to marked bits in the bitmap. |
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inline bool iterate(G1CMBitMapClosure* cl, MemRegion mr); |
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void clear_region(HeapRegion* hr); |
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}; |
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#endif // SHARE_GC_G1_G1CONCURRENTMARKBITMAP_HPP |