| /* |
| * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/resolutionErrors.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/safepoint.hpp" |
| #include "utilities/hashtable.inline.hpp" |
| |
| // add new entry to the table |
| void ResolutionErrorTable::add_entry(int index, unsigned int hash, |
| const constantPoolHandle& pool, int cp_index, |
| Symbol* error, Symbol* message) |
| { |
| assert_locked_or_safepoint(SystemDictionary_lock); |
| assert(!pool.is_null() && error != NULL, "adding NULL obj"); |
| |
| ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error, message); |
| add_entry(index, entry); |
| } |
| |
| // find entry in the table |
| ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash, |
| const constantPoolHandle& pool, int cp_index) |
| { |
| assert_locked_or_safepoint(SystemDictionary_lock); |
| |
| for (ResolutionErrorEntry *error_probe = bucket(index); |
| error_probe != NULL; |
| error_probe = error_probe->next()) { |
| if (error_probe->hash() == hash && error_probe->pool() == pool()) { |
| return error_probe;; |
| } |
| } |
| return NULL; |
| } |
| |
| void ResolutionErrorEntry::set_error(Symbol* e) { |
| assert(e != NULL, "must set a value"); |
| _error = e; |
| _error->increment_refcount(); |
| } |
| |
| void ResolutionErrorEntry::set_message(Symbol* c) { |
| assert(c != NULL, "must set a value"); |
| _message = c; |
| _message->increment_refcount(); |
| } |
| |
| // create new error entry |
| ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, ConstantPool* pool, |
| int cp_index, Symbol* error, |
| Symbol* message) |
| { |
| ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable<ConstantPool*, mtClass>::new_entry(hash, pool); |
| entry->set_cp_index(cp_index); |
| entry->set_error(error); |
| entry->set_message(message); |
| |
| return entry; |
| } |
| |
| void ResolutionErrorTable::free_entry(ResolutionErrorEntry *entry) { |
| // decrement error refcount |
| assert(entry->error() != NULL, "error should be set"); |
| entry->error()->decrement_refcount(); |
| entry->message()->decrement_refcount(); |
| Hashtable<ConstantPool*, mtClass>::free_entry(entry); |
| } |
| |
| |
| // create resolution error table |
| ResolutionErrorTable::ResolutionErrorTable(int table_size) |
| : Hashtable<ConstantPool*, mtClass>(table_size, sizeof(ResolutionErrorEntry)) { |
| } |
| |
| // RedefineClasses support - remove matching entry of a |
| // constant pool that is going away |
| void ResolutionErrorTable::delete_entry(ConstantPool* c) { |
| assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| for (int i = 0; i < table_size(); i++) { |
| for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) { |
| ResolutionErrorEntry* entry = *p; |
| assert(entry->pool() != NULL, "resolution error table is corrupt"); |
| if (entry->pool() == c) { |
| *p = entry->next(); |
| free_entry(entry); |
| } else { |
| p = entry->next_addr(); |
| } |
| } |
| } |
| } |
| |
| |
| // Remove unloaded entries from the table |
| void ResolutionErrorTable::purge_resolution_errors() { |
| assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| for (int i = 0; i < table_size(); i++) { |
| for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) { |
| ResolutionErrorEntry* entry = *p; |
| assert(entry->pool() != (ConstantPool*)NULL, "resolution error table is corrupt"); |
| ConstantPool* pool = entry->pool(); |
| assert(pool->pool_holder() != NULL, "Constant pool without a class?"); |
| ClassLoaderData* loader_data = |
| pool->pool_holder()->class_loader_data(); |
| if (!loader_data->is_unloading()) { |
| p = entry->next_addr(); |
| } else { |
| *p = entry->next(); |
| free_entry(entry); |
| } |
| } |
| } |
| } |