1 /*
2 * Copyright (c) 2005, 2010, 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
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
31 class ResolutionErrorEntry;
32
33 // ResolutionError objects are used to record errors encountered during
34 // constant pool resolution (JVMS 5.4.3).
35
36 class ResolutionErrorTable : public Hashtable {
37
38 public:
39 ResolutionErrorTable(int table_size);
40
41 ResolutionErrorEntry* new_entry(int hash, constantPoolOop pool, int cp_index, symbolOop error);
42
43 ResolutionErrorEntry* bucket(int i) {
44 return (ResolutionErrorEntry*)Hashtable::bucket(i);
45 }
46
47 ResolutionErrorEntry** bucket_addr(int i) {
48 return (ResolutionErrorEntry**)Hashtable::bucket_addr(i);
49 }
50
51 void add_entry(int index, ResolutionErrorEntry* new_entry) {
52 Hashtable::add_entry(index, (HashtableEntry*)new_entry);
53 }
54
55 void add_entry(int index, unsigned int hash,
56 constantPoolHandle pool, int which, symbolHandle error);
57
58
59 // find error given the constant pool and constant pool index
60 ResolutionErrorEntry* find_entry(int index, unsigned int hash,
61 constantPoolHandle pool, int cp_index);
62
63
64 unsigned int compute_hash(constantPoolHandle pool, int cp_index) {
65 return (unsigned int) pool->identity_hash() + cp_index;
66 }
67
68 // purges unloaded entries from the table
69 void purge_resolution_errors(BoolObjectClosure* is_alive);
70
71 // this table keeps symbolOops alive
72 void always_strong_classes_do(OopClosure* blk);
73
74 // GC support.
75 void oops_do(OopClosure* f);
76 };
77
78
79 class ResolutionErrorEntry : public HashtableEntry {
80 private:
81 int _cp_index;
82 symbolOop _error;
83
84 public:
85 constantPoolOop pool() const { return (constantPoolOop)literal(); }
86 constantPoolOop* pool_addr() { return (constantPoolOop*)literal_addr(); }
87
88 int cp_index() const { return _cp_index; }
89 void set_cp_index(int cp_index) { _cp_index = cp_index; }
90
91 symbolOop error() const { return _error; }
92 void set_error(symbolOop e) { _error = e; }
93 symbolOop* error_addr() { return &_error; }
94
95 ResolutionErrorEntry* next() const {
96 return (ResolutionErrorEntry*)HashtableEntry::next();
97 }
98
99 ResolutionErrorEntry** next_addr() {
100 return (ResolutionErrorEntry**)HashtableEntry::next_addr();
101 }
102
103 // GC support
104 void oops_do(OopClosure* blk);
105 };
106
107 #endif // SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP