1 /* 2 * Copyright (c) 2017, 2019, 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.types.CIntegerField; 31 import sun.jvm.hotspot.types.Type; 32 import sun.jvm.hotspot.types.TypeDataBase; 33 34 // Mirror class for ZPageAllocator 35 36 public class ZPageAllocator extends VMObject { 37 38 private static CIntegerField maxCapacityField; 39 private static CIntegerField capacityField; 40 private static CIntegerField usedField; 41 42 static { 43 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase())); 44 } 45 46 static private synchronized void initialize(TypeDataBase db) { 47 Type type = db.lookupType("ZPageAllocator"); 48 49 maxCapacityField = type.getCIntegerField("_max_capacity"); 50 capacityField = type.getCIntegerField("_capacity"); 51 usedField = type.getCIntegerField("_used"); 52 } 53 54 public long maxCapacity() { 55 return maxCapacityField.getValue(addr); 56 } 57 58 public long capacity() { 59 return capacityField.getValue(addr); 60 } 61 62 public long used() { 63 return usedField.getValue(addr); 64 } 65 66 public ZPageAllocator(Address addr) { 67 super(addr); 68 } 69 }