1 /* 2 * Copyright (c) 2017, 2023, 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_G1FULLGCCOMPACTIONPOINT_HPP 26 #define SHARE_GC_G1_G1FULLGCCOMPACTIONPOINT_HPP 27 28 #include "memory/allocation.hpp" 29 #include "oops/oopsHierarchy.hpp" 30 #include "utilities/growableArray.hpp" 31 #include "utilities/pair.hpp" 32 33 class G1FullCollector; 34 class HeapRegion; 35 class PreservedMarks; 36 37 class G1FullGCCompactionPoint : public CHeapObj<mtGC> { 38 G1FullCollector* _collector; 39 HeapRegion* _current_region; 40 HeapWord* _compaction_top; 41 PreservedMarks* _preserved_stack; 42 GrowableArray<HeapRegion*>* _compaction_regions; 43 GrowableArrayIterator<HeapRegion*> _compaction_region_iterator; 44 45 bool object_will_fit(size_t size); 46 void initialize_values(); 47 void switch_region(); 48 HeapRegion* next_region(); 49 uint find_contiguous_before(HeapRegion* hr, uint num_regions); 50 51 public: 52 G1FullGCCompactionPoint(G1FullCollector* collector, PreservedMarks* preserved_stack); 53 ~G1FullGCCompactionPoint(); 54 55 bool has_regions(); 56 bool is_initialized(); 57 void initialize(HeapRegion* hr); 58 void update(); 59 template <bool ALT_FWD> 60 void forward(oop object, size_t size); 61 template <bool ALT_FWD> 62 void forward_humongous(HeapRegion* hr); 63 void add(HeapRegion* hr); 64 void add_humongous(HeapRegion* hr); 65 66 void remove_at_or_above(uint bottom); 67 HeapRegion* current_region(); 68 69 GrowableArray<HeapRegion*>* regions(); 70 71 PreservedMarks* preserved_stack() const { 72 assert(_preserved_stack != nullptr, "must be initialized"); 73 return _preserved_stack; 74 } 75 76 void set_preserved_stack(PreservedMarks* preserved_stack) { 77 assert(_preserved_stack == nullptr, "only initialize once"); 78 _preserved_stack = preserved_stack; 79 } 80 }; 81 82 #endif // SHARE_GC_G1_G1FULLGCCOMPACTIONPOINT_HPP