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annotate agent/src/share/classes/sun/jvm/hotspot/utilities/IntArray.java @ 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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1 package sun.jvm.hotspot.utilities;
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2
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3 import java.util.Observable;
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4 import java.util.Observer;
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5
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6 import sun.jvm.hotspot.debugger.Address;
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7 import sun.jvm.hotspot.runtime.VM;
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8 import sun.jvm.hotspot.types.Type;
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9 import sun.jvm.hotspot.types.TypeDataBase;
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10 import sun.jvm.hotspot.types.WrongTypeException;
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11
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12 public class IntArray extends GenericArray {
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13 static {
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14 VM.registerVMInitializedObserver(new Observer() {
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15 public void update(Observable o, Object data) {
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16 initialize(VM.getVM().getTypeDataBase());
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17 }
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18 });
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19 }
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20
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21 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
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22 elemType = db.lookupType("int");
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23
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24 Type type = db.lookupType("Array<int>");
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25 dataFieldOffset = type.getAddressField("_data").getOffset();
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26 }
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27
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28 private static long dataFieldOffset;
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29 protected static Type elemType;
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30
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31 public IntArray(Address addr) {
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32 super(addr, dataFieldOffset);
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33 }
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34
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35 public int at(int i) {
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36 return (int)getIntegerAt(i);
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37 }
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38
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39 public Type getElemType() {
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40 return elemType;
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41 }
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42 }