Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/GenericArray.java @ 12704:0e998f0daddf
Code cache: make sure we collect statistics even if the compiler is not recognized
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 07 Nov 2013 11:17:23 +0100 |
parents | da91efe96a93 |
children |
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package sun.jvm.hotspot.utilities; import java.util.Observable; import java.util.Observer; import sun.jvm.hotspot.debugger.Address; import sun.jvm.hotspot.oops.ArrayKlass; import sun.jvm.hotspot.oops.CIntField; import sun.jvm.hotspot.oops.Oop; import sun.jvm.hotspot.runtime.VM; import sun.jvm.hotspot.runtime.VMObject; import sun.jvm.hotspot.types.AddressField; import sun.jvm.hotspot.types.Type; import sun.jvm.hotspot.types.TypeDataBase; import sun.jvm.hotspot.types.WrongTypeException; /** * The base class for the mirrors of the Array<T> C++ classes. */ public abstract class GenericArray extends VMObject { 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 { // Array<int> is arbitrarily chosen to get the fields in Array<T>. Type type = db.lookupType("Array<int>"); lengthField = new CIntField(type.getCIntegerField("_length"), 0); } private static long sizeOfArray; private static CIntField lengthField; private long dataFieldOffset; public GenericArray(Address addr, long dataOffset) { super(addr); dataFieldOffset = dataOffset; } public int length() { return (int)lengthField.getValue(this); } // for compatibility with TypeArray public int getLength() { return length(); } /** * Gets the element at the given index. */ protected long getIntegerAt(int index) { if (index < 0 || index >= length()) throw new ArrayIndexOutOfBoundsException(index + " " + length()); Type elemType = getElemType(); if (!getElemType().isCIntegerType()) throw new RuntimeException("elemType must be of CInteger type"); Address data = getAddress().addOffsetTo(dataFieldOffset); long elemSize = elemType.getSize(); return data.getCIntegerAt(index * elemSize, elemSize, false); } protected Address getAddressAt(int index) { if (index < 0 || index >= length()) throw new ArrayIndexOutOfBoundsException(index); Type elemType = getElemType(); if (getElemType().isCIntegerType()) throw new RuntimeException("elemType must not be of CInteger type"); Address data = getAddress().addOffsetTo(dataFieldOffset); long elemSize = elemType.getSize(); return data.getAddressAt(index * elemSize); } private long byteSizeof(int length) { return sizeOfArray + length * getElemType().getSize(); } public long getSize() { return VM.getVM().alignUp(byteSizeof(length()), VM.getVM().getBytesPerWord()) / VM.getVM().getBytesPerWord(); } /** * The element type of this array. */ public abstract Type getElemType(); }