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comparison: src/share/vm/classfile/resolutionErrors.cpp
src/share/vm/classfile/resolutionErrors.cpp
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- f90c822e73f8
- child 6876
- 710a3c8b516e
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| 1 /* | |
| 2 * Copyright (c) 2005, 2012, 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 #include "precompiled.hpp" | |
| 26 #include "classfile/resolutionErrors.hpp" | |
| 27 #include "memory/resourceArea.hpp" | |
| 28 #include "oops/oop.inline.hpp" | |
| 29 #include "runtime/handles.inline.hpp" | |
| 30 #include "runtime/safepoint.hpp" | |
| 31 #include "utilities/hashtable.inline.hpp" | |
| 32 | |
| 33 // add new entry to the table | |
| 34 void ResolutionErrorTable::add_entry(int index, unsigned int hash, | |
| 35 constantPoolHandle pool, int cp_index, Symbol* error) | |
| 36 { | |
| 37 assert_locked_or_safepoint(SystemDictionary_lock); | |
| 38 assert(!pool.is_null() && error != NULL, "adding NULL obj"); | |
| 39 | |
| 40 ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error); | |
| 41 add_entry(index, entry); | |
| 42 } | |
| 43 | |
| 44 // find entry in the table | |
| 45 ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash, | |
| 46 constantPoolHandle pool, int cp_index) | |
| 47 { | |
| 48 assert_locked_or_safepoint(SystemDictionary_lock); | |
| 49 | |
| 50 for (ResolutionErrorEntry *error_probe = bucket(index); | |
| 51 error_probe != NULL; | |
| 52 error_probe = error_probe->next()) { | |
| 53 if (error_probe->hash() == hash && error_probe->pool() == pool()) { | |
| 54 return error_probe;; | |
| 55 } | |
| 56 } | |
| 57 return NULL; | |
| 58 } | |
| 59 | |
| 60 void ResolutionErrorEntry::set_error(Symbol* e) { | |
| 61 assert(e == NULL || _error == NULL, "cannot reset error"); | |
| 62 _error = e; | |
| 63 if (_error != NULL) _error->increment_refcount(); | |
| 64 } | |
| 65 | |
| 66 // create new error entry | |
| 67 ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, ConstantPool* pool, | |
| 68 int cp_index, Symbol* error) | |
| 69 { | |
| 70 ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable<ConstantPool*, mtClass>::new_entry(hash, pool); | |
| 71 entry->set_cp_index(cp_index); | |
| 72 NOT_PRODUCT(entry->set_error(NULL);) | |
| 73 entry->set_error(error); | |
| 74 | |
| 75 return entry; | |
| 76 } | |
| 77 | |
| 78 void ResolutionErrorTable::free_entry(ResolutionErrorEntry *entry) { | |
| 79 // decrement error refcount | |
| 80 assert(entry->error() != NULL, "error should be set"); | |
| 81 entry->error()->decrement_refcount(); | |
| 82 Hashtable<ConstantPool*, mtClass>::free_entry(entry); | |
| 83 } | |
| 84 | |
| 85 | |
| 86 // create resolution error table | |
| 87 ResolutionErrorTable::ResolutionErrorTable(int table_size) | |
| 88 : Hashtable<ConstantPool*, mtClass>(table_size, sizeof(ResolutionErrorEntry)) { | |
| 89 } | |
| 90 | |
| 91 // RedefineClasses support - remove matching entry of a | |
| 92 // constant pool that is going away | |
| 93 void ResolutionErrorTable::delete_entry(ConstantPool* c) { | |
| 94 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 95 for (int i = 0; i < table_size(); i++) { | |
| 96 for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) { | |
| 97 ResolutionErrorEntry* entry = *p; | |
| 98 assert(entry->pool() != NULL, "resolution error table is corrupt"); | |
| 99 if (entry->pool() == c) { | |
| 100 *p = entry->next(); | |
| 101 free_entry(entry); | |
| 102 } else { | |
| 103 p = entry->next_addr(); | |
| 104 } | |
| 105 } | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 | |
| 110 // Remove unloaded entries from the table | |
| 111 void ResolutionErrorTable::purge_resolution_errors() { | |
| 112 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 113 for (int i = 0; i < table_size(); i++) { | |
| 114 for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) { | |
| 115 ResolutionErrorEntry* entry = *p; | |
| 116 assert(entry->pool() != (ConstantPool*)NULL, "resolution error table is corrupt"); | |
| 117 ConstantPool* pool = entry->pool(); | |
| 118 assert(pool->pool_holder() != NULL, "Constant pool without a class?"); | |
| 119 ClassLoaderData* loader_data = | |
| 120 pool->pool_holder()->class_loader_data(); | |
| 121 if (!loader_data->is_unloading()) { | |
| 122 p = entry->next_addr(); | |
| 123 } else { | |
| 124 *p = entry->next(); | |
| 125 free_entry(entry); | |
| 126 } | |
| 127 } | |
| 128 } | |
| 129 } |
