Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2005, 2014, 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,

                                      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,

                                                        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);

       }

     }

   }

 }