1 /*

     2  * Copyright (c) 2003, 2015, 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.parallel;

    26 

    27 import java.io.*;

    28 import java.util.*;

    29 

    30 import sun.jvm.hotspot.debugger.*;

    31 import sun.jvm.hotspot.memory.*;

    32 import sun.jvm.hotspot.runtime.*;

    33 import sun.jvm.hotspot.types.*;

    34 

    35 public class PSOldGen extends VMObject {

    36    static {

    37       VM.registerVMInitializedObserver(new Observer() {

    38          public void update(Observable o, Object data) {

    39             initialize(VM.getVM().getTypeDataBase());

    40          }

    41       });

    42    }

    43 

    44    private static synchronized void initialize(TypeDataBase db) {

    45       Type type = db.lookupType("PSOldGen");

    46       objectSpaceField = type.getAddressField("_object_space");

    47    }

    48 

    49    public PSOldGen(Address addr) {

    50       super(addr);

    51    }

    52 

    53    // Fields

    54    private static AddressField objectSpaceField;

    55 

    56    // Accessors

    57    public MutableSpace objectSpace() {

    58       return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, objectSpaceField.getValue(addr));

    59    }

    60 

    61    public long capacity() {

    62       return objectSpace().capacity();

    63    }

    64 

    65    public long used() {

    66       return objectSpace().used();

    67    }

    68 

    69    public boolean isIn(Address a) {

    70       return objectSpace().contains(a);

    71    }

    72 

    73    public void printOn(PrintStream tty) {

    74       tty.print("PSOldGen [ ");

    75       objectSpace().printOn(tty);

    76       tty.print(" ] ");

    77    }

    78 }