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 36 class G1CMBitMap; 37 38 class G1FullGCPrepareTask : public G1FullGCTask { 39 protected: 40 volatile bool _freed_regions; 41 HeapRegionClaimer _hrclaimer; 42 43 void set_freed_regions(); 44 45 public: 46 G1FullGCPrepareTask(G1FullCollector* collector); 47 void work(uint worker_id); 48 void prepare_serial_compaction(); 49 bool has_freed_regions(); 50 51 protected: 52 class G1CalculatePointersClosure : public HeapRegionClosure { 53 protected: 54 G1CollectedHeap* _g1h; 55 G1CMBitMap* _bitmap; 56 G1FullGCCompactionPoint* _cp; 57 uint _humongous_regions_removed; 58 59 virtual void prepare_for_compaction(HeapRegion* hr); 60 void prepare_for_compaction_work(G1FullGCCompactionPoint* cp, HeapRegion* hr); 61 void free_humongous_region(HeapRegion* hr); 62 void reset_region_metadata(HeapRegion* hr); 63 64 public: 65 G1CalculatePointersClosure(G1CMBitMap* bitmap, 66 G1FullGCCompactionPoint* cp); 67 68 void update_sets(); 69 bool do_heap_region(HeapRegion* hr); 70 bool freed_regions(); 71 }; 72 73 class G1PrepareCompactLiveClosure : public StackObj { 74 G1FullGCCompactionPoint* _cp; 75 76 public: 77 G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp); 78 size_t apply(oop object); 79 }; 80 81 class G1RePrepareClosure : public StackObj { 82 G1FullGCCompactionPoint* _cp; 83 HeapRegion* _current; 84 85 public: G1RePrepareClosure(G1FullGCCompactionPoint * hrcp,HeapRegion * hr)86 G1RePrepareClosure(G1FullGCCompactionPoint* hrcp, 87 HeapRegion* hr) : 88 _cp(hrcp), 89 _current(hr) { } 90 91 size_t apply(oop object); 92 }; 93 }; 94 95 #endif // SHARE_GC_G1_G1FULLGCPREPARETASK_HPP 96