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comparison src/share/vm/classfile/resolutionErrors.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children cff162798819
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-1:000000000000 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
25 # include "incls/_precompiled.incl"
26 # include "incls/_resolutionErrors.cpp.incl"
27
28 // add new entry to the table
29 void ResolutionErrorTable::add_entry(int index, unsigned int hash,
30 constantPoolHandle pool, int cp_index, symbolHandle error)
31 {
32 assert_locked_or_safepoint(SystemDictionary_lock);
33 assert(!pool.is_null() && !error.is_null(), "adding NULL obj");
34
35 ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error());
36 add_entry(index, entry);
37 }
38
39 // find entry in the table
40 ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash,
41 constantPoolHandle pool, int cp_index)
42 {
43 assert_locked_or_safepoint(SystemDictionary_lock);
44
45 for (ResolutionErrorEntry *error_probe = bucket(index);
46 error_probe != NULL;
47 error_probe = error_probe->next()) {
48 if (error_probe->hash() == hash && error_probe->pool() == pool()) {
49 return error_probe;;
50 }
51 }
52 return NULL;
53 }
54
55 // create new error entry
56 ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, constantPoolOop pool,
57 int cp_index, symbolOop error)
58 {
59 ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable::new_entry(hash, pool);
60 entry->set_cp_index(cp_index);
61 entry->set_error(error);
62
63 return entry;
64 }
65
66 // create resolution error table
67 ResolutionErrorTable::ResolutionErrorTable(int table_size)
68 : Hashtable(table_size, sizeof(ResolutionErrorEntry)) {
69 }
70
71 // GC support
72 void ResolutionErrorTable::oops_do(OopClosure* f) {
73 for (int i = 0; i < table_size(); i++) {
74 for (ResolutionErrorEntry* probe = bucket(i);
75 probe != NULL;
76 probe = probe->next()) {
77 assert(probe->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");
78 assert(probe->error() != (symbolOop)NULL, "resolution error table is corrupt");
79 probe->oops_do(f);
80 }
81 }
82 }
83
84 // GC support
85 void ResolutionErrorEntry::oops_do(OopClosure* blk) {
86 blk->do_oop((oop*)pool_addr());
87 blk->do_oop((oop*)error_addr());
88 }
89
90 // We must keep the symbolOop used in the error alive. The constantPoolOop will
91 // decide when the entry can be purged.
92 void ResolutionErrorTable::always_strong_classes_do(OopClosure* blk) {
93 for (int i = 0; i < table_size(); i++) {
94 for (ResolutionErrorEntry* probe = bucket(i);
95 probe != NULL;
96 probe = probe->next()) {
97 assert(probe->error() != (symbolOop)NULL, "resolution error table is corrupt");
98 blk->do_oop((oop*)probe->error_addr());
99 }
100 }
101 }
102
103 // Remove unloaded entries from the table
104 void ResolutionErrorTable::purge_resolution_errors(BoolObjectClosure* is_alive) {
105 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint")
106 for (int i = 0; i < table_size(); i++) {
107 for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) {
108 ResolutionErrorEntry* entry = *p;
109 assert(entry->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");
110 constantPoolOop pool = entry->pool();
111 if (is_alive->do_object_b(pool)) {
112 p = entry->next_addr();
113 } else {
114 *p = entry->next();
115 free_entry(entry);
116 }
117 }
118 }
119 }