1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.gc.z; 26 27 import sun.jvm.hotspot.debugger.Address; 28 import sun.jvm.hotspot.runtime.VM; 29 import sun.jvm.hotspot.runtime.VMObject; 30 import sun.jvm.hotspot.runtime.VMObjectFactory; 31 import sun.jvm.hotspot.types.AddressField; 32 import sun.jvm.hotspot.types.CIntegerField; 33 import sun.jvm.hotspot.types.Type; 34 import sun.jvm.hotspot.types.TypeDataBase; 35 36 // Mirror class for ZPageAllocator 37 38 public class ZPageAllocator extends VMObject { 39 40 private static AddressField physicalField; 41 private static CIntegerField usedField; 42 43 static { 44 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); 45 } 46 47 static private synchronized void initialize(TypeDataBase db) { 48 Type type = db.lookupType("ZPageAllocator"); 49 50 physicalField = type.getAddressField("_physical"); 51 usedField = type.getCIntegerField("_used"); 52 } 53 54 private ZPhysicalMemoryManager physical() { 55 Address physicalAddr = physicalField.getValue(addr); 56 return (ZPhysicalMemoryManager)VMObjectFactory.newObject(ZPhysicalMemoryManager.class, physicalAddr); 57 } 58 59 public long maxCapacity() { 60 return physical().maxCapacity(); 61 } 62 63 public long capacity() { 64 return physical().capacity(); 65 } 66 67 public long used() { 68 return usedField.getValue(addr); 69 } 70 71 public ZPageAllocator(Address addr) { 72 super(addr); 73 } 74 }