resolutionErrors.hpp revision 0:a61af66fc99e 
1/*
2 * Copyright 2005 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25class ResolutionErrorEntry;
26
27// ResolutionError objects are used to record errors encountered during
28// constant pool resolution (JVMS 5.4.3).
29
30class ResolutionErrorTable : public Hashtable {
31
32public:
33  ResolutionErrorTable(int table_size);
34
35  ResolutionErrorEntry* new_entry(int hash, constantPoolOop pool, int cp_index, symbolOop error);
36
37  ResolutionErrorEntry* bucket(int i) {
38    return (ResolutionErrorEntry*)Hashtable::bucket(i);
39  }
40
41  ResolutionErrorEntry** bucket_addr(int i) {
42    return (ResolutionErrorEntry**)Hashtable::bucket_addr(i);
43  }
44
45  void add_entry(int index, ResolutionErrorEntry* new_entry) {
46    Hashtable::add_entry(index, (HashtableEntry*)new_entry);
47  }
48
49  void add_entry(int index, unsigned int hash,
50                 constantPoolHandle pool, int which, symbolHandle error);
51
52
53  // find error given the constant pool and constant pool index
54  ResolutionErrorEntry* find_entry(int index, unsigned int hash,
55                                   constantPoolHandle pool, int cp_index);
56
57
58  unsigned int compute_hash(constantPoolHandle pool, int cp_index) {
59    return (unsigned int) pool->identity_hash() + cp_index;
60  }
61
62  // purges unloaded entries from the table
63  void purge_resolution_errors(BoolObjectClosure* is_alive);
64
65  // this table keeps symbolOops alive
66  void always_strong_classes_do(OopClosure* blk);
67
68  // GC support.
69  void oops_do(OopClosure* f);
70};
71
72
73class ResolutionErrorEntry : public HashtableEntry {
74 private:
75  int               _cp_index;
76  symbolOop         _error;
77
78 public:
79  constantPoolOop    pool() const               { return (constantPoolOop)literal(); }
80  constantPoolOop*   pool_addr()                { return (constantPoolOop*)literal_addr(); }
81
82  int                cp_index() const           { return _cp_index; }
83  void               set_cp_index(int cp_index) { _cp_index = cp_index; }
84
85  symbolOop          error() const              { return _error; }
86  void               set_error(symbolOop e)     { _error = e; }
87  symbolOop*         error_addr()               { return &_error; }
88
89  ResolutionErrorEntry* next() const {
90    return (ResolutionErrorEntry*)HashtableEntry::next();
91  }
92
93  ResolutionErrorEntry** next_addr() {
94    return (ResolutionErrorEntry**)HashtableEntry::next_addr();
95  }
96
97  // GC support
98  void oops_do(OopClosure* blk);
99};
100