Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/utilities/IntArray.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 |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/utilities/IntArray.java Sat Sep 01 13:25:18 2012 -0400 @@ -0,0 +1,42 @@ +package sun.jvm.hotspot.utilities; + +import java.util.Observable; +import java.util.Observer; + +import sun.jvm.hotspot.debugger.Address; +import sun.jvm.hotspot.runtime.VM; +import sun.jvm.hotspot.types.Type; +import sun.jvm.hotspot.types.TypeDataBase; +import sun.jvm.hotspot.types.WrongTypeException; + +public class IntArray extends GenericArray { + static { + VM.registerVMInitializedObserver(new Observer() { + public void update(Observable o, Object data) { + initialize(VM.getVM().getTypeDataBase()); + } + }); + } + + private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { + elemType = db.lookupType("int"); + + Type type = db.lookupType("Array<int>"); + dataFieldOffset = type.getAddressField("_data").getOffset(); + } + + private static long dataFieldOffset; + protected static Type elemType; + + public IntArray(Address addr) { + super(addr, dataFieldOffset); + } + + public int at(int i) { + return (int)getIntegerAt(i); + } + + public Type getElemType() { + return elemType; + } +}