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
21 * questions.
22 */
23
24#ifndef SHARE_GC_Z_ZNMETHODTABLE_HPP
25#define SHARE_GC_Z_ZNMETHODTABLE_HPP
26
27#include "gc/z/zNMethodTableIteration.hpp"
28#include "gc/z/zSafeDelete.hpp"
29#include "memory/allocation.hpp"
30
31class nmethod;
32class NMethodClosure;
33class ZNMethodTableEntry;
34class ZWorkers;
35
36class ZNMethodTable : public AllStatic {
37private:
38 static ZNMethodTableEntry* _table;
39 static size_t _size;
40 static size_t _nregistered;
41 static size_t _nunregistered;
42 static ZNMethodTableIteration _iteration;
43 static ZSafeDelete<ZNMethodTableEntry[]> _safe_delete;
44
45 static ZNMethodTableEntry* create(size_t size);
46 static void destroy(ZNMethodTableEntry* table);
47
48 static size_t first_index(const nmethod* nm, size_t size);
49 static size_t next_index(size_t prev_index, size_t size);
50
51 static bool register_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm);
52 static void unregister_entry(ZNMethodTableEntry* table, size_t size, nmethod* nm);
53
54 static void rebuild(size_t new_size);
55 static void rebuild_if_needed();
56
57public:
58 static size_t registered_nmethods();
59 static size_t unregistered_nmethods();
60
61 static void register_nmethod(nmethod* nm);
62 static void unregister_nmethod(nmethod* nm);
63
64 static void wait_until_iteration_done();
65
66 static void nmethods_do_begin();
67 static void nmethods_do_end();
68 static void nmethods_do(NMethodClosure* cl);
69
70 static void unlink(ZWorkers* workers, bool unloading_occurred);
71 static void purge(ZWorkers* workers);
72};
73
74#endif // SHARE_GC_Z_ZNMETHODTABLE_HPP
75