Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/classfile/ClassLoaderData.java @ 6725:da91efe96a93
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 |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
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children | 79f492f184d0 |
rev | line source |
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1 /* |
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2 * Copyright (c) 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 package sun.jvm.hotspot.classfile; |
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26 |
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27 import java.io.PrintStream; |
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28 import java.util.*; |
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29 import sun.jvm.hotspot.debugger.*; |
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30 import sun.jvm.hotspot.runtime.*; |
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31 import sun.jvm.hotspot.oops.*; |
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32 import sun.jvm.hotspot.types.*; |
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33 |
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34 public class ClassLoaderData extends VMObject { |
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35 static { |
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36 VM.registerVMInitializedObserver(new Observer() { |
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37 public void update(Observable o, Object data) { |
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38 initialize(VM.getVM().getTypeDataBase()); |
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39 } |
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40 }); |
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41 } |
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42 |
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43 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
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44 Type type = db.lookupType("ClassLoaderData"); |
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45 classLoaderField = type.getOopField("_class_loader"); |
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46 nextField = type.getAddressField("_next"); |
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47 } |
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48 |
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49 private static sun.jvm.hotspot.types.OopField classLoaderField; |
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50 private static AddressField nextField; |
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51 |
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52 public ClassLoaderData(Address addr) { |
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53 super(addr); |
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54 } |
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55 |
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56 public static ClassLoaderData instantiateWrapperFor(Address addr) { |
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57 if (addr == null) { |
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58 return null; |
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59 } |
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60 return new ClassLoaderData(addr); |
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61 } |
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62 |
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63 public Oop getClassLoader() { |
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64 return VM.getVM().getObjectHeap().newOop(classLoaderField.getValue(getAddress())); |
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65 } |
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66 } |