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1   /*
2    * Copyright (c) 2003, 2012, 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_implementation.parallelScavenge;
26  
27  import java.io.*;
28  import java.util.*;
29  
30  import sun.jvm.hotspot.debugger.*;
31  import sun.jvm.hotspot.gc_interface.*;
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_SCAVENGE_HEAP;
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  }