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annotate src/share/vm/classfile/classLoaderData.inline.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
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children 90273fc0a981
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1 /*
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "classfile/classLoaderData.hpp"
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26 #include "classfile/javaClasses.hpp"
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27
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28 inline ClassLoaderData* ClassLoaderData::class_loader_data(oop loader) {
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29 if (loader == NULL) return ClassLoaderData::the_null_class_loader_data();
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30 ClassLoaderData* loader_data = java_lang_ClassLoader::loader_data(loader);
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31 assert(loader_data != NULL, "Must be");
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32 return loader_data;
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33 }
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34
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35
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36 inline ClassLoaderData *ClassLoaderDataGraph::find_or_create(Handle loader) {
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37 assert(loader() != NULL,"Must be a class loader");
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38 // Gets the class loader data out of the java/lang/ClassLoader object, if non-null
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39 // it's already in the loader_data, so no need to add
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40 ClassLoaderData** loader_data_addr = java_lang_ClassLoader::loader_data_addr(loader());
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41 ClassLoaderData* loader_data_id = *loader_data_addr;
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42 if (loader_data_id) {
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43 return loader_data_id;
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44 }
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45 return ClassLoaderDataGraph::add(loader_data_addr, loader);
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46 }