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
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;
35
36 typedef OopStorage::ParState<true /* concurrent */, false /* is_const */> ZOopStorageIterator;
37
38 template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
39 class ZSerialOopsDo {
40 private:
41 T* const _iter;
42 volatile bool _claimed;
43
44 public:
45 ZSerialOopsDo(T* iter);
46 void oops_do(ZRootsIteratorClosure* cl);
47 };
48
49 template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
50 class ZParallelOopsDo {
51 private:
52 T* const _iter;
53 volatile bool _completed;
54
55 public:
56 ZParallelOopsDo(T* iter);
57 void oops_do(ZRootsIteratorClosure* cl);
58 };
59
60 template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
61 class ZSerialWeakOopsDo {
62 private:
63 T* const _iter;
64 volatile bool _claimed;
65
66 public:
67 ZSerialWeakOopsDo(T* iter);
68 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
69 };
70
71 template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
72 class ZParallelWeakOopsDo {
73 private:
74 T* const _iter;
75 volatile bool _completed;
76
77 public:
78 ZParallelWeakOopsDo(T* iter);
79 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
80 };
81
82 class ZRootsIteratorClosure : public OopClosure {
83 public:
84 virtual void do_thread(Thread* thread) {}
85
86 virtual bool should_disarm_nmethods() const {
87 return false;
88 }
89 };
90
91 class ZRootsIterator {
92 private:
93 const bool _visit_jvmti_weak_export;
94
95 void do_universe(ZRootsIteratorClosure* cl);
96 void do_object_synchronizer(ZRootsIteratorClosure* cl);
97 void do_management(ZRootsIteratorClosure* cl);
98 void do_jvmti_export(ZRootsIteratorClosure* cl);
99 void do_jvmti_weak_export(ZRootsIteratorClosure* cl);
100 void do_system_dictionary(ZRootsIteratorClosure* cl);
101 void do_threads(ZRootsIteratorClosure* cl);
102 void do_code_cache(ZRootsIteratorClosure* cl);
103
104 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_universe> _universe;
105 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_object_synchronizer> _object_synchronizer;
106 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_management> _management;
107 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_jvmti_export> _jvmti_export;
108 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_jvmti_weak_export> _jvmti_weak_export;
109 ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_system_dictionary> _system_dictionary;
110 ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_threads> _threads;
111 ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_code_cache> _code_cache;
112
113 public:
114 ZRootsIterator(bool visit_jvmti_weak_export = false);
115 ~ZRootsIterator();
116
117 void oops_do(ZRootsIteratorClosure* cl);
118 };
119
120 class ZConcurrentRootsIterator {
121 private:
122 ZOopStorageIterator _jni_handles_iter;
123 ZOopStorageIterator _vm_handles_iter;
124 const int _cld_claim;
125
126 void do_jni_handles(ZRootsIteratorClosure* cl);
127 void do_vm_handles(ZRootsIteratorClosure* cl);
128 void do_class_loader_data_graph(ZRootsIteratorClosure* cl);
129
130 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_jni_handles> _jni_handles;
131 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_vm_handles> _vm_handles;
132 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_class_loader_data_graph> _class_loader_data_graph;
133
134 public:
135 ZConcurrentRootsIterator(int cld_claim);
136 ~ZConcurrentRootsIterator();
137
138 void oops_do(ZRootsIteratorClosure* cl);
139 };
140
141 class ZConcurrentRootsIteratorClaimStrong : public ZConcurrentRootsIterator {
142 public:
143 ZConcurrentRootsIteratorClaimStrong() :
144 ZConcurrentRootsIterator(ClassLoaderData::_claim_strong) {}
145 };
146
147 class ZConcurrentRootsIteratorClaimOther : public ZConcurrentRootsIterator {
148 public:
149 ZConcurrentRootsIteratorClaimOther() :
150 ZConcurrentRootsIterator(ClassLoaderData::_claim_other) {}
151 };
152
153 class ZConcurrentRootsIteratorClaimNone : public ZConcurrentRootsIterator {
154 public:
155 ZConcurrentRootsIteratorClaimNone() :
156 ZConcurrentRootsIterator(ClassLoaderData::_claim_none) {}
157 };
158
159 class ZWeakRootsIterator {
160 private:
161 void do_jvmti_weak_export(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
162 void do_jfr_weak(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
163
164 ZSerialWeakOopsDo<ZWeakRootsIterator, &ZWeakRootsIterator::do_jvmti_weak_export> _jvmti_weak_export;
165 ZSerialWeakOopsDo<ZWeakRootsIterator, &ZWeakRootsIterator::do_jfr_weak> _jfr_weak;
166
167 public:
168 ZWeakRootsIterator();
169 ~ZWeakRootsIterator();
170
171 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
172 void oops_do(ZRootsIteratorClosure* cl);
173 };
174
175 class ZConcurrentWeakRootsIterator {
176 private:
177 ZOopStorageIterator _vm_weak_handles_iter;
178 ZOopStorageIterator _jni_weak_handles_iter;
179 ZOopStorageIterator _string_table_iter;
180 ZOopStorageIterator _resolved_method_table_iter;
181
182 void do_vm_weak_handles(ZRootsIteratorClosure* cl);
183 void do_jni_weak_handles(ZRootsIteratorClosure* cl);
184 void do_string_table(ZRootsIteratorClosure* cl);
185 void do_resolved_method_table(ZRootsIteratorClosure* cl);
186
187 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_vm_weak_handles> _vm_weak_handles;
188 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_jni_weak_handles> _jni_weak_handles;
189 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_string_table> _string_table;
190 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_resolved_method_table> _resolved_method_table;
191
192 public:
193 ZConcurrentWeakRootsIterator();
194 ~ZConcurrentWeakRootsIterator();
195
196 void oops_do(ZRootsIteratorClosure* cl);
197 };
198
199 #endif // SHARE_GC_Z_ZROOTSITERATOR_HPP