1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_GC_G1_G1FULLGCPREPARETASK_HPP 26 #define SHARE_GC_G1_G1FULLGCPREPARETASK_HPP 27 28 #include "gc/g1/g1FullGCCompactionPoint.hpp" 29 #include "gc/g1/g1FullGCScope.hpp" 30 #include "gc/g1/g1FullGCTask.hpp" 31 #include "gc/g1/g1RootProcessor.hpp" 32 #include "gc/g1/g1StringDedup.hpp" 33 #include "gc/g1/heapRegionManager.hpp" 34 #include "gc/shared/referenceProcessor.hpp" 35 #include "utilities/ticks.hpp" 36 37 class G1CMBitMap; 38 39 class G1FullGCPrepareTask : public G1FullGCTask { 40 protected: 41 volatile bool _freed_regions; 42 HeapRegionClaimer _hrclaimer; 43 44 void set_freed_regions(); 45 46 public: 47 G1FullGCPrepareTask(G1FullCollector* collector); 48 void work(uint worker_id); 49 void prepare_serial_compaction(); 50 bool has_freed_regions(); 51 52 protected: 53 class G1CalculatePointersClosure : public HeapRegionClosure { 54 protected: 55 G1CollectedHeap* _g1h; 56 G1CMBitMap* _bitmap; 57 G1FullGCCompactionPoint* _cp; 58 uint _humongous_regions_removed; 59 60 virtual void prepare_for_compaction(HeapRegion* hr); 61 void prepare_for_compaction_work(G1FullGCCompactionPoint* cp, HeapRegion* hr); 62 void free_humongous_region(HeapRegion* hr); 63 void reset_region_metadata(HeapRegion* hr); 64 65 public: 66 G1CalculatePointersClosure(G1CMBitMap* bitmap, 67 G1FullGCCompactionPoint* cp); 68 69 void update_sets(); 70 bool doHeapRegion(HeapRegion* hr); 71 bool freed_regions(); 72 }; 73 74 class G1PrepareCompactLiveClosure : public StackObj { 75 G1FullGCCompactionPoint* _cp; 76 77 public: 78 G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp); 79 size_t apply(oop object); 80 }; 81 82 class G1RePrepareClosure : public StackObj { 83 G1FullGCCompactionPoint* _cp; 84 HeapRegion* _current; 85 86 public: 87 G1RePrepareClosure(G1FullGCCompactionPoint* hrcp, 88 HeapRegion* hr) : 89 _cp(hrcp), 90 _current(hr) { } 91 92 size_t apply(oop object); 93 }; 94 }; 95 96 #endif // SHARE_GC_G1_G1FULLGCPREPARETASK_HPP