1 /*
2 * Copyright (c) 2015, 2018, 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 #ifndef SHARE_GC_Z_ZROOTSITERATOR_HPP
25 #define SHARE_GC_Z_ZROOTSITERATOR_HPP
26
27 #include "gc/shared/oopStorageParState.hpp"
28 #include "gc/shared/suspendibleThreadSet.hpp"
29 #include "memory/allocation.hpp"
30 #include "memory/iterator.hpp"
31 #include "runtime/thread.hpp"
32 #include "utilities/globalDefinitions.hpp"
33
34 class ZRootsIteratorClosure : public OopClosure, public ThreadClosure {
35 public:
36 virtual void do_thread(Thread* thread) {
37 thread->oops_do(this, NULL);
38 }
39 };
40
41 typedef OopStorage::ParState<true /* concurrent */, false /* is_const */> ZOopStorageIterator;
42
43 template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
44 class ZSerialOopsDo {
45 private:
46 T* const _iter;
47 volatile bool _claimed;
48
49 public:
50 ZSerialOopsDo(T* iter);
51 void oops_do(ZRootsIteratorClosure* cl);
52 };
53
54 template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
55 class ZParallelOopsDo {
56 private:
57 T* const _iter;
58 volatile bool _completed;
59
60 public:
61 ZParallelOopsDo(T* iter);
62 void oops_do(ZRootsIteratorClosure* cl);
63 };
64
65 template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
66 class ZSerialWeakOopsDo {
67 private:
68 T* const _iter;
69 volatile bool _claimed;
70
71 public:
72 ZSerialWeakOopsDo(T* iter);
73 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
74 };
75
76 template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
77 class ZParallelWeakOopsDo {
78 private:
79 T* const _iter;
80 volatile bool _completed;
81
82 public:
83 ZParallelWeakOopsDo(T* iter);
84 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
85 };
86
87 class ZRootsIterator {
88 private:
89 void do_universe(ZRootsIteratorClosure* cl);
90 void do_object_synchronizer(ZRootsIteratorClosure* cl);
91 void do_management(ZRootsIteratorClosure* cl);
92 void do_jvmti_export(ZRootsIteratorClosure* cl);
93 void do_jvmti_weak_export(ZRootsIteratorClosure* cl);
94 void do_system_dictionary(ZRootsIteratorClosure* cl);
95 void do_threads(ZRootsIteratorClosure* cl);
96 void do_code_cache(ZRootsIteratorClosure* cl);
97
98 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_universe> _universe;
99 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_object_synchronizer> _object_synchronizer;
100 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_management> _management;
101 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_jvmti_export> _jvmti_export;
102 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_jvmti_weak_export> _jvmti_weak_export;
103 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_system_dictionary> _system_dictionary;
104 ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_threads> _threads;
105 ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_code_cache> _code_cache;
106
107 public:
108 ZRootsIterator();
109 ~ZRootsIterator();
110
111 void oops_do(ZRootsIteratorClosure* cl, bool visit_jvmti_weak_export = false);
112 };
113
114 class ZConcurrentRootsIterator {
115 private:
116 bool _marking;
117 SuspendibleThreadSetJoiner _sts_joiner;
118 ZOopStorageIterator _jni_handles_iter;
119
120 void do_jni_handles(ZRootsIteratorClosure* cl);
121 void do_class_loader_data_graph(ZRootsIteratorClosure* cl);
122
123 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_jni_handles> _jni_handles;
124 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_class_loader_data_graph> _class_loader_data_graph;
125
126 public:
127 ZConcurrentRootsIterator(bool claim_clds);
128 ~ZConcurrentRootsIterator();
129
130 void oops_do(ZRootsIteratorClosure* cl);
131 };
132
133 class ZWeakRootsIterator {
134 private:
135 void do_jvmti_weak_export(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
136 void do_jfr_weak(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
137
138 ZSerialWeakOopsDo<ZWeakRootsIterator, &ZWeakRootsIterator::do_jvmti_weak_export> _jvmti_weak_export;
139 ZSerialWeakOopsDo<ZWeakRootsIterator, &ZWeakRootsIterator::do_jfr_weak> _jfr_weak;
140
141 public:
142 ZWeakRootsIterator();
143 ~ZWeakRootsIterator();
144
145 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
146 void oops_do(ZRootsIteratorClosure* cl);
147 };
148
149 class ZConcurrentWeakRootsIterator {
150 private:
151 ZOopStorageIterator _vm_weak_handles_iter;
152 ZOopStorageIterator _jni_weak_handles_iter;
153 ZOopStorageIterator _string_table_iter;
154
155 void do_vm_weak_handles(ZRootsIteratorClosure* cl);
156 void do_jni_weak_handles(ZRootsIteratorClosure* cl);
157 void do_string_table(ZRootsIteratorClosure* cl);
158
159 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_vm_weak_handles> _vm_weak_handles;
160 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_jni_weak_handles> _jni_weak_handles;
161 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_string_table> _string_table;
162
163 public:
164 ZConcurrentWeakRootsIterator();
165 ~ZConcurrentWeakRootsIterator();
166
167 void oops_do(ZRootsIteratorClosure* cl);
168 };
169
170 class ZThreadRootsIterator {
171 private:
172 void do_threads(ZRootsIteratorClosure* cl);
173
174 ZParallelOopsDo<ZThreadRootsIterator, &ZThreadRootsIterator::do_threads> _threads;
175
176 public:
177 ZThreadRootsIterator();
178 ~ZThreadRootsIterator();
179
180 void oops_do(ZRootsIteratorClosure* cl);
181 };
182
183 #endif // SHARE_GC_Z_ZROOTSITERATOR_HPP