Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/HeapRegionSeq.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | 50287b659eb8 |
children | 6701abbc4441 |
line wrap: on
line source
/* * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.gc_implementation.g1; import java.util.Iterator; import java.util.Observable; import java.util.Observer; import sun.jvm.hotspot.debugger.Address; import sun.jvm.hotspot.runtime.VM; import sun.jvm.hotspot.runtime.VMObject; import sun.jvm.hotspot.runtime.VMObjectFactory; import sun.jvm.hotspot.types.AddressField; import sun.jvm.hotspot.types.CIntegerField; import sun.jvm.hotspot.types.Type; import sun.jvm.hotspot.types.TypeDataBase; // Mirror class for HeapRegionSeq. It essentially encapsulates the G1HeapRegionTable. public class HeapRegionSeq extends VMObject { // G1HeapRegionTable _regions static private long regionsFieldOffset; // uint _committed_length static private CIntegerField committedLengthField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } static private synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("HeapRegionSeq"); regionsFieldOffset = type.getField("_regions").getOffset(); committedLengthField = type.getCIntegerField("_committed_length"); } private G1HeapRegionTable regions() { Address regionsAddr = addr.addOffsetTo(regionsFieldOffset); return (G1HeapRegionTable) VMObjectFactory.newObject(G1HeapRegionTable.class, regionsAddr); } public long length() { return regions().length(); } public long committedLength() { return committedLengthField.getValue(addr); } public Iterator<HeapRegion> heapRegionIterator() { return regions().heapRegionIterator(committedLength()); } public HeapRegionSeq(Address addr) { super(addr); } }