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.
22 *
23 */
24
25 #ifndef SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
26 #define SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
27
28 #include "memory/iterator.hpp"
29 #include "memory/universe.hpp"
30
31 class G1CollectedHeap;
32 class G1FullCollector;
33 class G1CMBitMap;
34 class G1FullGCMarker;
35
36 // Below are closures used by the G1 Full GC.
37 class G1IsAliveClosure : public BoolObjectClosure {
38 G1CMBitMap* _bitmap;
39
40 public:
41 G1IsAliveClosure(G1CMBitMap* bitmap) : _bitmap(bitmap) { }
42
43 virtual bool do_object_b(oop p);
44 };
45
46 class G1FullKeepAliveClosure: public OopClosure {
47 G1FullGCMarker* _marker;
48 template <class T>
49 inline void do_oop_work(T* p);
50
51 public:
52 G1FullKeepAliveClosure(G1FullGCMarker* pm) : _marker(pm) { }
53
54 virtual void do_oop(oop* p);
55 virtual void do_oop(narrowOop* p);
56 };
57
58 class G1MarkAndPushClosure : public ExtendedOopClosure {
59 G1FullGCMarker* _marker;
60 uint _worker_id;
61
62 public:
63 G1MarkAndPushClosure(uint worker, G1FullGCMarker* marker, ReferenceProcessor* ref) :
64 _marker(marker),
65 _worker_id(worker),
66 ExtendedOopClosure(ref) { }
67
68 template <class T> inline void do_oop_nv(T* p);
69 virtual void do_oop(oop* p);
70 virtual void do_oop(narrowOop* p);
71
72 virtual bool do_metadata();
73 bool do_metadata_nv();
74
75 virtual void do_klass(Klass* k);
76 void do_klass_nv(Klass* k);
77
78 virtual void do_cld(ClassLoaderData* cld);
79 void do_cld_nv(ClassLoaderData* cld);
80 };
81
82 class G1AdjustClosure : public OopClosure {
83 public:
84 template <class T> static inline oop adjust_pointer(T* p);
85 virtual void do_oop(oop* p);
86 virtual void do_oop(narrowOop* p);
87 };
88
89 class G1AdjustAndRebuildClosure : public ExtendedOopClosure {
90 uint _worker_id;
91 size_t _compaction_delta;
92 G1CollectedHeap* _g1h;
93
94 inline size_t calculate_compaction_delta(oop current, oop forwardee);
95 template <class T> inline T* add_compaction_delta(T* p);
96
97 public:
98 G1AdjustAndRebuildClosure(uint worker_id);
99
100 void update_compaction_delta(oop obj);
101
102 template <class T> inline void add_reference(T* from_field, oop reference, uint worker_id);
103 template <class T> void do_oop_nv(T* p);
104 virtual void do_oop(oop* p);
105 virtual void do_oop(narrowOop* p);
106
107 virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
108 };
109
110 class G1AdjustObjectClosure {
111 G1AdjustAndRebuildClosure* _closure;
112
113 public:
114 G1AdjustObjectClosure(G1AdjustAndRebuildClosure* cl) : _closure(cl) { }
115
116 inline int adjust_object(oop obj);
117 };
118
119 class G1VerifyOopClosure: public OopClosure {
120 private:
121 G1CollectedHeap* _g1h;
122 bool _failures;
123 oop _containing_obj;
124 VerifyOption _verify_option;
125
126 public:
127 int _cc;
128 G1VerifyOopClosure(VerifyOption option);
129
130 void set_containing_obj(oop obj) {
131 _containing_obj = obj;
132 }
133
134 bool failures() { return _failures; }
135 void print_object(outputStream* out, oop obj);
136
137 template <class T> void do_oop_nv(T* p);
138
139 void do_oop(oop* p);
140 void do_oop(narrowOop* p);
141 };
142
143 class G1FollowStackClosure: public VoidClosure {
144 G1FullGCMarker* _marker;
145
146 public:
147 G1FollowStackClosure(G1FullGCMarker* marker) : _marker(marker) {}
148 virtual void do_void();
149 };
150
151 #endif // SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP