1/*
2 * Copyright (c) 2017, 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_ZHEAPITERATOR_HPP
25#define SHARE_GC_Z_ZHEAPITERATOR_HPP
26
27#include "gc/z/zGranuleMap.hpp"
28#include "memory/allocation.hpp"
29#include "utilities/stack.hpp"
30
31class ObjectClosure;
32class ZHeapIteratorBitMap;
33
34class ZHeapIterator : public StackObj {
35 template<bool Concurrent, bool Weak> friend class ZHeapIteratorRootOopClosure;
36 template<bool VisitReferents> friend class ZHeapIteratorOopClosure;
37
38private:
39 typedef ZGranuleMap<ZHeapIteratorBitMap*> ZVisitMap;
40 typedef ZGranuleMapIterator<ZHeapIteratorBitMap*> ZVisitMapIterator;
41 typedef Stack<oop, mtGC> ZVisitStack;
42
43 ZVisitStack _visit_stack;
44 ZVisitMap _visit_map;
45
46 ZHeapIteratorBitMap* object_map(oop obj);
47 void push(oop obj);
48
49 template <typename RootsIterator, bool Concurrent, bool Weak> void push_roots();
50 template <bool VisitReferents> void push_fields(oop obj);
51 template <bool VisitReferents> void objects_do(ObjectClosure* cl);
52
53public:
54 ZHeapIterator();
55 ~ZHeapIterator();
56
57 void objects_do(ObjectClosure* cl, bool visit_weaks);
58};
59
60#endif // SHARE_GC_Z_ZHEAPITERATOR_HPP
61