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 }
--- EOF ---