1 /*
   2  * Copyright (c) 2003, 2018, 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.gc.shared.*;
  32 import sun.jvm.hotspot.runtime.*;
  33 import sun.jvm.hotspot.types.*;
  34 
  35 public class ParallelScavengeHeap extends CollectedHeap {
  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("ParallelScavengeHeap");
  46       youngGenField = type.getAddressField("_young_gen");
  47       oldGenField    = type.getAddressField("_old_gen");
  48    }
  49 
  50    public ParallelScavengeHeap(Address addr) {
  51       super(addr);
  52    }
  53 
  54    // Fields
  55    private static AddressField youngGenField;
  56    private static AddressField oldGenField;
  57 
  58    // Accessors
  59    public PSYoungGen youngGen() {
  60       return (PSYoungGen) VMObjectFactory.newObject(PSYoungGen.class, youngGenField.getValue());
  61    }
  62 
  63    public PSOldGen oldGen() {
  64       return (PSOldGen) VMObjectFactory.newObject(PSOldGen.class, oldGenField.getValue());
  65    }
  66 
  67    public long capacity() {
  68       return youngGen().capacity() + oldGen().capacity();
  69    }
  70 
  71    public long used() {
  72       return youngGen().used() + oldGen().used();
  73    }
  74 
  75    public boolean isIn(Address a) {
  76       if (youngGen().isIn(a)) {
  77          return true;
  78       }
  79 
  80       if (oldGen().isIn(a)) {
  81          return true;
  82       }
  83 
  84       return false;
  85    }
  86 
  87    public CollectedHeapName kind() {
  88       return CollectedHeapName.PARALLEL;
  89    }
  90 
  91    public void printOn(PrintStream tty) {
  92       tty.print("ParallelScavengeHeap [ ");
  93       youngGen().printOn(tty);
  94       oldGen().printOn(tty);
  95       tty.print(" ] ");
  96    }
  97 }