1 /*
2 * Copyright (c) 2007, 2015, 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_VM_GC_CMS_PAROOPCLOSURES_HPP
26 #define SHARE_VM_GC_CMS_PAROOPCLOSURES_HPP
27
28 #include "gc/shared/genOopClosures.hpp"
29 #include "gc/shared/taskqueue.hpp"
30 #include "memory/padded.hpp"
31
32 // Closures for ParNewGeneration
33
34 class ParScanThreadState;
35 class ParNewGeneration;
36 typedef Padded<OopTaskQueue> ObjToScanQueue;
37 typedef GenericTaskQueueSet<ObjToScanQueue, mtGC> ObjToScanQueueSet;
38 class ParallelTaskTerminator;
39
40 class ParScanClosure: public OopsInKlassOrGenClosure {
41 protected:
42 ParScanThreadState* _par_scan_state;
43 ParNewGeneration* _g;
44 HeapWord* _boundary;
45 template <class T> void inline par_do_barrier(T* p);
46 template <class T> void inline do_oop_work(T* p,
47 bool gc_barrier,
48 bool root_scan);
49 public:
50 ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);
51 };
52
53 class ParScanWithBarrierClosure: public ParScanClosure {
54 public:
55 ParScanWithBarrierClosure(ParNewGeneration* g,
56 ParScanThreadState* par_scan_state) :
57 ParScanClosure(g, par_scan_state) {}
58 virtual void do_oop(oop* p);
59 virtual void do_oop(narrowOop* p);
60 inline void do_oop_nv(oop* p);
61 inline void do_oop_nv(narrowOop* p);
62 };
63
64 class ParScanWithoutBarrierClosure: public ParScanClosure {
65 public:
66 ParScanWithoutBarrierClosure(ParNewGeneration* g,
67 ParScanThreadState* par_scan_state) :
68 ParScanClosure(g, par_scan_state) {}
69 virtual void do_oop(oop* p);
70 virtual void do_oop(narrowOop* p);
71 inline void do_oop_nv(oop* p);
72 inline void do_oop_nv(narrowOop* p);
73 };
74
75 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {
76 public:
77 ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,
78 ParScanThreadState* par_scan_state) :
79 ParScanClosure(g, par_scan_state) {}
80 virtual void do_oop(oop* p);
81 virtual void do_oop(narrowOop* p);
82 };
83
84 class ParRootScanWithoutBarrierClosure: public ParScanClosure {
85 public:
86 ParRootScanWithoutBarrierClosure(ParNewGeneration* g,
87 ParScanThreadState* par_scan_state) :
88 ParScanClosure(g, par_scan_state) {}
89 virtual void do_oop(oop* p);
90 virtual void do_oop(narrowOop* p);
91 };
92
93 class ParScanWeakRefClosure: public ScanWeakRefClosure {
94 protected:
95 ParScanThreadState* _par_scan_state;
96 template <class T> inline void do_oop_work(T* p);
97 public:
98 ParScanWeakRefClosure(ParNewGeneration* g,
99 ParScanThreadState* par_scan_state);
100 virtual void do_oop(oop* p);
101 virtual void do_oop(narrowOop* p);
102 inline void do_oop_nv(oop* p);
103 inline void do_oop_nv(narrowOop* p);
104 };
105
106 class ParEvacuateFollowersClosure: public VoidClosure {
107 private:
108 ParScanThreadState* _par_scan_state;
109 ParScanThreadState* par_scan_state() { return _par_scan_state; }
110
111 // We want to preserve the specific types here (rather than "OopClosure")
112 // for later de-virtualization of do_oop calls.
113 ParScanWithoutBarrierClosure* _to_space_closure;
114 ParScanWithoutBarrierClosure* to_space_closure() {
115 return _to_space_closure;
116 }
117 ParRootScanWithoutBarrierClosure* _to_space_root_closure;
118 ParRootScanWithoutBarrierClosure* to_space_root_closure() {
119 return _to_space_root_closure;
120 }
121
122 ParScanWithBarrierClosure* _old_gen_closure;
123 ParScanWithBarrierClosure* old_gen_closure () {
124 return _old_gen_closure;
125 }
126 ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;
127 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {
128 return _old_gen_root_closure;
129 }
130
131 ParNewGeneration* _par_gen;
132 ParNewGeneration* par_gen() { return _par_gen; }
133
134 ObjToScanQueueSet* _task_queues;
135 ObjToScanQueueSet* task_queues() { return _task_queues; }
136
137 ParallelTaskTerminator* _terminator;
138 ParallelTaskTerminator* terminator() { return _terminator; }
139 public:
140 ParEvacuateFollowersClosure(
141 ParScanThreadState* par_scan_state_,
142 ParScanWithoutBarrierClosure* to_space_closure_,
143 ParScanWithBarrierClosure* old_gen_closure_,
144 ParRootScanWithoutBarrierClosure* to_space_root_closure_,
145 ParNewGeneration* par_gen_,
146 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,
147 ObjToScanQueueSet* task_queues_,
148 ParallelTaskTerminator* terminator_);
149 virtual void do_void();
150 };
151
152 #endif // SHARE_VM_GC_CMS_PAROOPCLOSURES_HPP