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.
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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/markOop.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
39typedef OverflowTaskQueue<oop, mtGC> OopQueue;
40typedef OverflowTaskQueue<ObjArrayTask, mtGC> ObjArrayTaskQueue;
41
42typedef GenericTaskQueueSet<OopQueue, mtGC> OopQueueSet;
43typedef GenericTaskQueueSet<ObjArrayTaskQueue, mtGC> ObjArrayTaskQueueSet;
44
45class G1CMBitMap;
46
47class 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);
73public:
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 ParallelTaskTerminator* 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
99