resolutionErrors.hpp revision 3465:d2a62e0f25eb 
1/*
2 * Copyright (c) 2005, 2011, 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.
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23 */
24
25#ifndef SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP
26#define SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP
27
28#include "oops/constantPoolOop.hpp"
29#include "utilities/hashtable.hpp"
30
31class ResolutionErrorEntry;
32
33// ResolutionError objects are used to record errors encountered during
34// constant pool resolution (JVMS 5.4.3).
35
36class ResolutionErrorTable : public Hashtable<constantPoolOop, mtClass> {
37
38public:
39  ResolutionErrorTable(int table_size);
40
41  ResolutionErrorEntry* new_entry(int hash, constantPoolOop pool, int cp_index, Symbol* error);
42  void free_entry(ResolutionErrorEntry *entry);
43
44  ResolutionErrorEntry* bucket(int i) {
45    return (ResolutionErrorEntry*)Hashtable<constantPoolOop, mtClass>::bucket(i);
46  }
47
48  ResolutionErrorEntry** bucket_addr(int i) {
49    return (ResolutionErrorEntry**)Hashtable<constantPoolOop, mtClass>::bucket_addr(i);
50  }
51
52  void add_entry(int index, ResolutionErrorEntry* new_entry) {
53    Hashtable<constantPoolOop, mtClass>::add_entry(index,
54      (HashtableEntry<constantPoolOop, mtClass>*)new_entry);
55  }
56
57  void add_entry(int index, unsigned int hash,
58                 constantPoolHandle pool, int which, Symbol* error);
59
60
61  // find error given the constant pool and constant pool index
62  ResolutionErrorEntry* find_entry(int index, unsigned int hash,
63                                   constantPoolHandle pool, int cp_index);
64
65
66  unsigned int compute_hash(constantPoolHandle pool, int cp_index) {
67    return (unsigned int) pool->identity_hash() + cp_index;
68  }
69
70  // purges unloaded entries from the table
71  void purge_resolution_errors(BoolObjectClosure* is_alive);
72
73  // GC support.
74  void oops_do(OopClosure* f);
75};
76
77
78class ResolutionErrorEntry : public HashtableEntry<constantPoolOop, mtClass> {
79 private:
80  int               _cp_index;
81  Symbol*           _error;
82
83 public:
84  constantPoolOop    pool() const               { return (constantPoolOop)literal(); }
85  constantPoolOop*   pool_addr()                { return (constantPoolOop*)literal_addr(); }
86
87  int                cp_index() const           { return _cp_index; }
88  void               set_cp_index(int cp_index) { _cp_index = cp_index; }
89
90  Symbol*            error() const              { return _error; }
91  void               set_error(Symbol* e);
92
93  ResolutionErrorEntry* next() const {
94    return (ResolutionErrorEntry*)HashtableEntry<constantPoolOop, mtClass>::next();
95  }
96
97  ResolutionErrorEntry** next_addr() {
98    return (ResolutionErrorEntry**)HashtableEntry<constantPoolOop, mtClass>::next_addr();
99  }
100
101  // GC support
102  void oops_do(OopClosure* blk);
103};
104
105#endif // SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP
106