1 /*
2 * Copyright (c) 2001, 2017, 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 *
134
135 class CLDScanClosure: public CLDClosure {
136 OopsInClassLoaderDataOrGenClosure* _scavenge_closure;
137 // true if the the modified oops state should be saved.
138 bool _accumulate_modified_oops;
139 public:
140 CLDScanClosure(OopsInClassLoaderDataOrGenClosure* scavenge_closure,
141 bool accumulate_modified_oops) :
142 _scavenge_closure(scavenge_closure), _accumulate_modified_oops(accumulate_modified_oops) {}
143 void do_cld(ClassLoaderData* cld);
144 };
145
146 class FilteringClosure: public ExtendedOopClosure {
147 private:
148 HeapWord* _boundary;
149 ExtendedOopClosure* _cl;
150 protected:
151 template <class T> inline void do_oop_work(T* p);
152 public:
153 FilteringClosure(HeapWord* boundary, ExtendedOopClosure* cl) :
154 ExtendedOopClosure(cl->ref_processor()), _boundary(boundary),
155 _cl(cl) {}
156 virtual void do_oop(oop* p);
157 virtual void do_oop(narrowOop* p);
158 inline void do_oop_nv(oop* p);
159 inline void do_oop_nv(narrowOop* p);
160 virtual bool do_metadata() { return do_metadata_nv(); }
161 inline bool do_metadata_nv() { assert(!_cl->do_metadata(), "assumption broken, must change to 'return _cl->do_metadata()'"); return false; }
162 };
163
164 // Closure for scanning DefNewGeneration's weak references.
165 // NOTE: very much like ScanClosure but not derived from
166 // OopsInGenClosure -- weak references are processed all
167 // at once, with no notion of which generation they were in.
168 class ScanWeakRefClosure: public OopClosure {
169 protected:
170 DefNewGeneration* _g;
171 HeapWord* _boundary;
172 template <class T> inline void do_oop_work(T* p);
173 public:
174 ScanWeakRefClosure(DefNewGeneration* g);
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1 /*
2 * Copyright (c) 2001, 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 *
134
135 class CLDScanClosure: public CLDClosure {
136 OopsInClassLoaderDataOrGenClosure* _scavenge_closure;
137 // true if the the modified oops state should be saved.
138 bool _accumulate_modified_oops;
139 public:
140 CLDScanClosure(OopsInClassLoaderDataOrGenClosure* scavenge_closure,
141 bool accumulate_modified_oops) :
142 _scavenge_closure(scavenge_closure), _accumulate_modified_oops(accumulate_modified_oops) {}
143 void do_cld(ClassLoaderData* cld);
144 };
145
146 class FilteringClosure: public ExtendedOopClosure {
147 private:
148 HeapWord* _boundary;
149 ExtendedOopClosure* _cl;
150 protected:
151 template <class T> inline void do_oop_work(T* p);
152 public:
153 FilteringClosure(HeapWord* boundary, ExtendedOopClosure* cl) :
154 ExtendedOopClosure(cl->ref_discoverer()), _boundary(boundary),
155 _cl(cl) {}
156 virtual void do_oop(oop* p);
157 virtual void do_oop(narrowOop* p);
158 inline void do_oop_nv(oop* p);
159 inline void do_oop_nv(narrowOop* p);
160 virtual bool do_metadata() { return do_metadata_nv(); }
161 inline bool do_metadata_nv() { assert(!_cl->do_metadata(), "assumption broken, must change to 'return _cl->do_metadata()'"); return false; }
162 };
163
164 // Closure for scanning DefNewGeneration's weak references.
165 // NOTE: very much like ScanClosure but not derived from
166 // OopsInGenClosure -- weak references are processed all
167 // at once, with no notion of which generation they were in.
168 class ScanWeakRefClosure: public OopClosure {
169 protected:
170 DefNewGeneration* _g;
171 HeapWord* _boundary;
172 template <class T> inline void do_oop_work(T* p);
173 public:
174 ScanWeakRefClosure(DefNewGeneration* g);
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