1 /* 2 * Copyright (c) 2017, 2021, 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/heapRegionManager.hpp" 33 #include "gc/shared/referenceProcessor.hpp" 34 35 class G1CMBitMap; 36 class G1FullCollector; 37 class SlidingForwarding; 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 private: 55 template<bool is_humongous> 56 void free_pinned_region(HeapRegion* hr); 57 protected: 58 G1CollectedHeap* _g1h; 59 G1FullCollector* _collector; 60 G1CMBitMap* _bitmap; 61 G1FullGCCompactionPoint* _cp; 62 bool _regions_freed; 63 64 bool should_compact(HeapRegion* hr); 65 void prepare_for_compaction(HeapRegion* hr); 66 void prepare_for_compaction_work(G1FullGCCompactionPoint* cp, HeapRegion* hr); 67 68 void reset_region_metadata(HeapRegion* hr); 69 70 public: 71 G1CalculatePointersClosure(G1FullCollector* collector, 72 G1FullGCCompactionPoint* cp); 73 74 bool do_heap_region(HeapRegion* hr); 75 bool freed_regions(); 76 }; 77 78 class G1PrepareCompactLiveClosure : public StackObj { 79 G1FullGCCompactionPoint* _cp; 80 SlidingForwarding* const _forwarding; 81 82 public: 83 G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp); 84 size_t apply(oop object); 85 }; 86 87 class G1RePrepareClosure : public StackObj { 88 G1FullGCCompactionPoint* _cp; 89 HeapRegion* _current; 90 91 public: 92 G1RePrepareClosure(G1FullGCCompactionPoint* hrcp, 93 HeapRegion* hr) : 94 _cp(hrcp), 95 _current(hr) { } 96 97 size_t apply(oop object); 98 }; 99 }; 100 101 #endif // SHARE_GC_G1_G1FULLGCPREPARETASK_HPP