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.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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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,
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24
25#ifndef SHARE_PRIMS_RESOLVEDMETHODTABLE_HPP
26#define SHARE_PRIMS_RESOLVEDMETHODTABLE_HPP
27
28#include "gc/shared/oopStorage.hpp"
29#include "memory/allocation.hpp"
30#include "oops/symbol.hpp"
31#include "oops/weakHandle.hpp"
32
33class ResolvedMethodTable;
34class ResolvedMethodTableConfig;
35
36class ResolvedMethodTable : public AllStatic {
37 static OopStorage* _weak_handles;
38
39 static volatile bool _has_work;
40public:
41 // Initialization
42 static void create_table();
43
44 static size_t table_size();
45
46 // Lookup and inserts
47 static oop find_method(const Method* method);
48 static oop add_method(const Method* method, Handle rmethod_name);
49
50 // Callbacks
51 static void item_added();
52 static void item_removed();
53
54 // Cleaning
55 static bool has_work() { return _has_work; }
56
57 // GC Support - Backing storage for the oop*s
58 static OopStorage* weak_storage() { return _weak_handles; }
59
60 // Cleaning and table management
61
62 static double get_load_factor();
63 static double get_dead_factor();
64
65 static void check_concurrent_work();
66 static void trigger_concurrent_work();
67 static void do_concurrent_work(JavaThread* jt);
68
69 static void grow(JavaThread* jt);
70 static void clean_dead_entries(JavaThread* jt);
71
72 // GC Notification
73
74 // Must be called before a parallel walk where objects might die.
75 static void reset_dead_counter();
76 // After the parallel walk this method must be called to trigger
77 // cleaning. Note it might trigger a resize instead.
78 static void finish_dead_counter();
79 // If GC uses ParState directly it should add the number of cleared
80 // entries to this method.
81 static void inc_dead_counter(size_t ndead);
82
83 // JVMTI Support - It is called at safepoint only for RedefineClasses
84 JVMTI_ONLY(static void adjust_method_entries(bool * trace_name_printed);)
85
86 // Debugging
87 static size_t items_count();
88 static void verify();
89};
90
91#endif // SHARE_PRIMS_RESOLVEDMETHODTABLE_HPP
92