1 /* 2 * Copyright (c) 2017, 2018, 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_G1FULLCOLLECTOR_HPP 26 #define SHARE_GC_G1_G1FULLCOLLECTOR_HPP 27 28 #include "gc/g1/g1FullGCCompactionPoint.hpp" 29 #include "gc/g1/g1FullGCMarker.hpp" 30 #include "gc/g1/g1FullGCOopClosures.hpp" 31 #include "gc/g1/g1FullGCScope.hpp" 32 #include "gc/shared/preservedMarks.hpp" 33 #include "gc/shared/referenceProcessor.hpp" 34 #include "gc/shared/taskqueue.hpp" 35 #include "memory/allocation.hpp" 36 37 class AbstractGangTask; 38 class G1CMBitMap; 39 class G1FullGCMarker; 40 class G1FullGCScope; 41 class G1FullGCCompactionPoint; 42 class GCMemoryManager; 43 class ReferenceProcessor; 44 45 // Subject-to-discovery closure for reference processing during Full GC. During 46 // Full GC the whole heap is subject to discovery. 47 class G1FullGCSubjectToDiscoveryClosure: public BoolObjectClosure { 48 public: do_object_b(oop p)49 bool do_object_b(oop p) { 50 assert(p != NULL, "must be"); 51 return true; 52 } 53 }; 54 55 // The G1FullCollector holds data associated with the current Full GC. 56 class G1FullCollector : StackObj { 57 G1CollectedHeap* _heap; 58 G1FullGCScope _scope; 59 uint _num_workers; 60 G1FullGCMarker** _markers; 61 G1FullGCCompactionPoint** _compaction_points; 62 OopQueueSet _oop_queue_set; 63 ObjArrayTaskQueueSet _array_queue_set; 64 PreservedMarksSet _preserved_marks_set; 65 G1FullGCCompactionPoint _serial_compaction_point; 66 G1IsAliveClosure _is_alive; 67 ReferenceProcessorIsAliveMutator _is_alive_mutator; 68 69 static uint calc_active_workers(); 70 71 G1FullGCSubjectToDiscoveryClosure _always_subject_to_discovery; 72 ReferenceProcessorSubjectToDiscoveryMutator _is_subject_mutator; 73 74 public: 75 G1FullCollector(G1CollectedHeap* heap, bool explicit_gc, bool clear_soft_refs); 76 ~G1FullCollector(); 77 78 void prepare_collection(); 79 void collect(); 80 void complete_collection(); 81 scope()82 G1FullGCScope* scope() { return &_scope; } workers()83 uint workers() { return _num_workers; } marker(uint id)84 G1FullGCMarker* marker(uint id) { return _markers[id]; } compaction_point(uint id)85 G1FullGCCompactionPoint* compaction_point(uint id) { return _compaction_points[id]; } oop_queue_set()86 OopQueueSet* oop_queue_set() { return &_oop_queue_set; } array_queue_set()87 ObjArrayTaskQueueSet* array_queue_set() { return &_array_queue_set; } preserved_mark_set()88 PreservedMarksSet* preserved_mark_set() { return &_preserved_marks_set; } serial_compaction_point()89 G1FullGCCompactionPoint* serial_compaction_point() { return &_serial_compaction_point; } 90 G1CMBitMap* mark_bitmap(); 91 ReferenceProcessor* reference_processor(); 92 93 private: 94 void phase1_mark_live_objects(); 95 void phase2_prepare_compaction(); 96 void phase3_adjust_pointers(); 97 void phase4_do_compaction(); 98 99 void restore_marks(); 100 void verify_after_marking(); 101 102 void run_task(AbstractGangTask* task); 103 }; 104 105 106 #endif // SHARE_GC_G1_G1FULLCOLLECTOR_HPP 107