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 : public OopClosure {
35 public:
36 virtual void do_thread(Thread* thread) {}
37 };
38
39 typedef OopStorage::ParState<true /* concurrent */, false /* is_const */> ZOopStorageIterator;
40
41 template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
42 class ZSerialOopsDo {
43 private:
44 T* const _iter;
45 volatile bool _claimed;
46
47 public:
48 ZSerialOopsDo(T* iter);
49 void oops_do(ZRootsIteratorClosure* cl);
50 };
51
52 template <typename T, void (T::*F)(ZRootsIteratorClosure*)>
53 class ZParallelOopsDo {
54 private:
55 T* const _iter;
56 volatile bool _completed;
57
58 public:
59 ZParallelOopsDo(T* iter);
60 void oops_do(ZRootsIteratorClosure* cl);
61 };
62
63 template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
64 class ZSerialWeakOopsDo {
65 private:
66 T* const _iter;
67 volatile bool _claimed;
68
69 public:
70 ZSerialWeakOopsDo(T* iter);
71 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
72 };
73
74 template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)>
75 class ZParallelWeakOopsDo {
76 private:
77 T* const _iter;
78 volatile bool _completed;
79
80 public:
81 ZParallelWeakOopsDo(T* iter);
82 void weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl);
83 };
84
85 class ZRootsIterator {
86 private:
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
105 public:
106 ZRootsIterator();
107 ~ZRootsIterator();
108
109 void oops_do(ZRootsIteratorClosure* cl, bool visit_jvmti_weak_export = false);
110 };
111
112 class ZConcurrentRootsIterator {
113 private:
114 ZOopStorageIterator _jni_handles_iter;
115 ZOopStorageIterator _vm_handles_iter;
116 int _cld_claim;
117
118 void do_jni_handles(ZRootsIteratorClosure* cl);
119 void do_vm_handles(ZRootsIteratorClosure* cl);
120 void do_class_loader_data_graph(ZRootsIteratorClosure* cl);
121
122 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_jni_handles> _jni_handles;
123 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_vm_handles> _vm_handles;
124 ZParallelOopsDo<ZConcurrentRootsIterator, &ZConcurrentRootsIterator::do_class_loader_data_graph> _class_loader_data_graph;
125
126 public:
127 ZConcurrentRootsIterator(int cld_claim);
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 ZOopStorageIterator _resolved_method_table_iter;
155
156 void do_vm_weak_handles(ZRootsIteratorClosure* cl);
157 void do_jni_weak_handles(ZRootsIteratorClosure* cl);
158 void do_string_table(ZRootsIteratorClosure* cl);
159 void do_resolved_method_table(ZRootsIteratorClosure* cl);
160
161 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_vm_weak_handles> _vm_weak_handles;
162 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_jni_weak_handles> _jni_weak_handles;
163 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_string_table> _string_table;
164 ZParallelOopsDo<ZConcurrentWeakRootsIterator, &ZConcurrentWeakRootsIterator::do_resolved_method_table> _resolved_method_table;
165
166 public:
167 ZConcurrentWeakRootsIterator();
168 ~ZConcurrentWeakRootsIterator();
169
170 void oops_do(ZRootsIteratorClosure* cl);
171 };
172
173 class ZThreadRootsIterator {
174 private:
175 void do_threads(ZRootsIteratorClosure* cl);
176
177 ZParallelOopsDo<ZThreadRootsIterator, &ZThreadRootsIterator::do_threads> _threads;
178
179 public:
180 ZThreadRootsIterator();
181 ~ZThreadRootsIterator();
182
183 void oops_do(ZRootsIteratorClosure* cl);
184 };
185
186 #endif // SHARE_GC_Z_ZROOTSITERATOR_HPP