1/*
2 * Copyright (c) 2015, 2019, 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
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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
34class ZRootsIteratorClosure : public OopClosure {
35public:
36 virtual void do_thread(Thread* thread) {}
37};
38
39typedef OopStorage::ParState<true /* concurrent */, false /* is_const */> ZOopStorageIterator;
40
41template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
42class ZSerialOopsDo {
43private:
44 T* const _iter;
45 volatile bool _claimed;
46
47public:
48 ZSerialOopsDo(T* iter);
49 void oops_do(ZRootsIteratorClosure* cl);
50};
51
52template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
53class ZParallelOopsDo {
54private:
55 T* const _iter;
56 volatile bool _completed;
57
58public:
59 ZParallelOopsDo(T* iter);
60 void oops_do(ZRootsIteratorClosure* cl);
61};
62
63template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
64class ZSerialWeakOopsDo {
65private:
66 T* const _iter;
67 volatile bool _claimed;
68
69public:
70 ZSerialWeakOopsDo(T* iter);
71 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
72};
73
74template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
75class ZParallelWeakOopsDo {
76private:
77 T* const _iter;
78 volatile bool _completed;
79
80public:
81 ZParallelWeakOopsDo(T* iter);
82 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
83};
84
85class ZRootsIterator {
86private:
87 void do_universe(ZRootsIteratorClosure* cl);
88 void do_object_synchronizer(ZRootsIteratorClosure* cl);
89 void do_management(ZRootsIteratorClosure* cl);
90 void do_jvmti_export(ZRootsIteratorClosure* cl);
91 void do_jvmti_weak_export(ZRootsIteratorClosure* cl);
92 void do_system_dictionary(ZRootsIteratorClosure* cl);
93 void do_threads(ZRootsIteratorClosure* cl);
94 void do_code_cache(ZRootsIteratorClosure* cl);
95
96 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_universe> _universe;
97 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_object_synchronizer> _object_synchronizer;
98 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_management> _management;
99 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_jvmti_export> _jvmti_export;
100 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_jvmti_weak_export> _jvmti_weak_export;
101 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_system_dictionary> _system_dictionary;
102 ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_threads> _threads;
103 ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_code_cache> _code_cache;
104
105public:
106 ZRootsIterator();
107 ~ZRootsIterator();
108
109 void oops_do(ZRootsIteratorClosure* cl, bool visit_jvmti_weak_export = false);
110};
111
112class ZConcurrentRootsIterator {
113private:
114 ZOopStorageIterator _jni_handles_iter;
115 int _cld_claim;
116
117 void do_jni_handles(ZRootsIteratorClosure* cl);
118 void do_class_loader_data_graph(ZRootsIteratorClosure* cl);
119
120 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_jni_handles> _jni_handles;
121 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_class_loader_data_graph> _class_loader_data_graph;
122
123public:
124 ZConcurrentRootsIterator(int cld_claim);
125 ~ZConcurrentRootsIterator();
126
127 void oops_do(ZRootsIteratorClosure* cl);
128};
129
130class ZWeakRootsIterator {
131private:
132 void do_jvmti_weak_export(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
133 void do_jfr_weak(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
134
135 ZSerialWeakOopsDo<ZWeakRootsIterator, &ZWeakRootsIterator::do_jvmti_weak_export> _jvmti_weak_export;
136 ZSerialWeakOopsDo<ZWeakRootsIterator, &ZWeakRootsIterator::do_jfr_weak> _jfr_weak;
137
138public:
139 ZWeakRootsIterator();
140 ~ZWeakRootsIterator();
141
142 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
143 void oops_do(ZRootsIteratorClosure* cl);
144};
145
146class ZConcurrentWeakRootsIterator {
147private:
148 ZOopStorageIterator _vm_weak_handles_iter;
149 ZOopStorageIterator _jni_weak_handles_iter;
150 ZOopStorageIterator _string_table_iter;
151 ZOopStorageIterator _resolved_method_table_iter;
152
153 void do_vm_weak_handles(ZRootsIteratorClosure* cl);
154 void do_jni_weak_handles(ZRootsIteratorClosure* cl);
155 void do_string_table(ZRootsIteratorClosure* cl);
156 void do_resolved_method_table(ZRootsIteratorClosure* cl);
157
158 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_vm_weak_handles> _vm_weak_handles;
159 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_jni_weak_handles> _jni_weak_handles;
160 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_string_table> _string_table;
161 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_resolved_method_table> _resolved_method_table;
162
163public:
164 ZConcurrentWeakRootsIterator();
165 ~ZConcurrentWeakRootsIterator();
166
167 void oops_do(ZRootsIteratorClosure* cl);
168};
169
170class ZThreadRootsIterator {
171private:
172 void do_threads(ZRootsIteratorClosure* cl);
173
174 ZParallelOopsDo<ZThreadRootsIterator, &ZThreadRootsIterator::do_threads> _threads;
175
176public:
177 ZThreadRootsIterator();
178 ~ZThreadRootsIterator();
179
180 void oops_do(ZRootsIteratorClosure* cl);
181};
182
183#endif // SHARE_GC_Z_ZROOTSITERATOR_HPP
184