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_G1FULLGCOOPCLOSURES_HPP
26 #define SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
27
28 #include "gc/shared/verifyOption.hpp"
29 #include "memory/iterator.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 G1FullCollector* _collector;
39 G1CMBitMap* _bitmap;
40
41 public:
42 G1IsAliveClosure(G1FullCollector* collector);
43 G1IsAliveClosure(G1FullCollector* collector, G1CMBitMap* bitmap) :
44 _collector(collector), _bitmap(bitmap) { }
45
46 virtual bool do_object_b(oop p);
47 };
48
49 class G1FullKeepAliveClosure: public OopClosure {
50 G1FullGCMarker* _marker;
51 template <class T>
52 inline void do_oop_work(T* p);
53
54 public:
55 G1FullKeepAliveClosure(G1FullGCMarker* pm) : _marker(pm) { }
56
57 virtual void do_oop(oop* p);
58 virtual void do_oop(narrowOop* p);
59 };
60
61 class G1MarkAndPushClosure : public OopIterateClosure {
62 G1FullGCMarker* _marker;
63 uint _worker_id;
64
65 public:
66 G1MarkAndPushClosure(uint worker, G1FullGCMarker* marker, ReferenceDiscoverer* ref) :
67 OopIterateClosure(ref),
68 _marker(marker),
69 _worker_id(worker) { }
70
71 template <class T> inline void do_oop_work(T* p);
72 virtual void do_oop(oop* p);
73 virtual void do_oop(narrowOop* p);
74
75 virtual bool do_metadata();
76 virtual void do_klass(Klass* k);
77 virtual void do_cld(ClassLoaderData* cld);
78 };
79
80 template <bool ALT_FWD>
81 class G1AdjustClosure : public BasicOopIterateClosure {
82 G1FullCollector* _collector;
83
84 template <class T> inline void adjust_pointer(T* p);
85 public:
86 G1AdjustClosure(G1FullCollector* collector) : _collector(collector) { }
87 template <class T> void do_oop_work(T* p) { adjust_pointer(p); }
88 virtual void do_oop(oop* p);
89 virtual void do_oop(narrowOop* p);
90
91 virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
92 };
93
94 class G1VerifyOopClosure: public BasicOopIterateClosure {
95 private:
96 G1CollectedHeap* _g1h;
97 bool _failures;
98 oop _containing_obj;
99 VerifyOption _verify_option;
100
101 public:
102 int _cc;
103 G1VerifyOopClosure(VerifyOption option);
104
105 void set_containing_obj(oop obj) {
106 _containing_obj = obj;
107 }
108
109 bool failures() { return _failures; }
110 void print_object(outputStream* out, oop obj);
111
112 template <class T> void do_oop_work(T* p);
113
114 void do_oop(oop* p) { do_oop_work(p); }
115 void do_oop(narrowOop* p) { do_oop_work(p); }
116 };
117
118 class G1FollowStackClosure: public VoidClosure {
119 G1FullGCMarker* _marker;
120
121 public:
122 G1FollowStackClosure(G1FullGCMarker* marker) : _marker(marker) {}
123 virtual void do_void();
124 };
125
126 #endif // SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP