1 /* 2 * Copyright (c) 2017, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 package sun.jvm.hotspot.gc.shenandoah; 25 26 import sun.jvm.hotspot.types.CIntegerField; 27 import sun.jvm.hotspot.runtime.VM; 28 import sun.jvm.hotspot.runtime.VMObject; 29 import sun.jvm.hotspot.types.Type; 30 import sun.jvm.hotspot.types.TypeDataBase; 31 import sun.jvm.hotspot.debugger.Address; 32 33 import java.util.Observable; 34 import java.util.Observer; 35 36 public class ShenandoahHeapRegion extends VMObject { 37 private static CIntegerField RegionSizeBytes; 38 static { 39 VM.registerVMInitializedObserver(new Observer() { 40 public void update(Observable o, Object data) { 41 initialize(VM.getVM().getTypeDataBase()); 42 } 43 }); 44 } 45 46 static private synchronized void initialize(TypeDataBase db) { 47 Type type = db.lookupType("ShenandoahHeapRegion"); 48 RegionSizeBytes = type.getCIntegerField("RegionSizeBytes"); 49 } 50 51 public static long regionSizeBytes() { return RegionSizeBytes.getValue(); } 52 53 public ShenandoahHeapRegion(Address addr) { 54 super(addr); 55 } 56 }