1 /* 2 * Copyright (c) 2017, 2020, 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_G1FULLGCMARKER_HPP 26 #define SHARE_GC_G1_G1FULLGCMARKER_HPP 27 28 #include "gc/g1/g1FullGCOopClosures.hpp" 29 #include "gc/shared/preservedMarks.hpp" 30 #include "gc/shared/taskqueue.hpp" 31 #include "memory/iterator.hpp" 32 #include "oops/markWord.hpp" 33 #include "oops/oop.hpp" 34 #include "runtime/timer.hpp" 35 #include "utilities/chunkedList.hpp" 36 #include "utilities/growableArray.hpp" 37 #include "utilities/stack.hpp" 38 39 typedef OverflowTaskQueue<oop, mtGC> OopQueue; 40 typedef OverflowTaskQueue<ObjArrayTask, mtGC> ObjArrayTaskQueue; 41 42 typedef GenericTaskQueueSet<OopQueue, mtGC> OopQueueSet; 43 typedef GenericTaskQueueSet<ObjArrayTaskQueue, mtGC> ObjArrayTaskQueueSet; 44 45 class G1CMBitMap; 46 47 class G1FullGCMarker : public CHeapObj<mtGC> { 48 uint _worker_id; 49 // Backing mark bitmap 50 G1CMBitMap* _bitmap; 51 52 // Mark stack 53 OopQueue _oop_stack; 54 ObjArrayTaskQueue _objarray_stack; 55 PreservedMarks* _preserved_stack; 56 57 // Marking closures 58 G1MarkAndPushClosure _mark_closure; 59 G1VerifyOopClosure _verify_closure; 60 G1FollowStackClosure _stack_closure; 61 CLDToOopClosure _cld_closure; 62 63 inline bool is_empty(); 64 inline bool pop_object(oop& obj); 65 inline bool pop_objarray(ObjArrayTask& array); 66 inline void push_objarray(oop obj, size_t index); 67 inline bool mark_object(oop obj); 68 69 // Marking helpers 70 inline void follow_object(oop obj); 71 inline void follow_array(objArrayOop array); 72 inline void follow_array_chunk(objArrayOop array, int index); 73 public: 74 G1FullGCMarker(uint worker_id, PreservedMarks* preserved_stack, G1CMBitMap* bitmap); 75 ~G1FullGCMarker(); 76 77 // Stack getters 78 OopQueue* oop_stack() { return &_oop_stack; } 79 ObjArrayTaskQueue* objarray_stack() { return &_objarray_stack; } 80 PreservedMarks* preserved_stack() { return _preserved_stack; } 81 82 // Marking entry points 83 template <class T> inline void mark_and_push(T* p); 84 inline void follow_klass(Klass* k); 85 inline void follow_cld(ClassLoaderData* cld); 86 87 inline void drain_stack(); 88 void complete_marking(OopQueueSet* oop_stacks, 89 ObjArrayTaskQueueSet* array_stacks, 90 OWSTTaskTerminator* terminator); 91 92 // Closure getters 93 CLDToOopClosure* cld_closure() { return &_cld_closure; } 94 G1MarkAndPushClosure* mark_closure() { return &_mark_closure; } 95 G1FollowStackClosure* stack_closure() { return &_stack_closure; } 96 }; 97 98 #endif // SHARE_GC_G1_G1FULLGCMARKER_HPP