Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/oops/ObjectHistogram.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2000-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.oops; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 | |
30 public class ObjectHistogram implements HeapVisitor { | |
31 | |
32 public ObjectHistogram() { map = new HashMap(); } | |
33 | |
34 private HashMap map; | |
35 | |
36 public void prologue(long size) {} | |
37 | |
38 public boolean doObj(Oop obj) { | |
39 Klass klass = obj.getKlass(); | |
40 if (!map.containsKey(klass)) map.put(klass, new ObjectHistogramElement(klass)); | |
41 ((ObjectHistogramElement) map.get(klass)).updateWith(obj); | |
42 return false; | |
43 } | |
44 | |
45 public void epilogue() {} | |
46 | |
47 /** Call this after the iteration is complete to obtain the | |
48 ObjectHistogramElements in descending order of total heap size | |
49 consumed in the form of a List<ObjectHistogramElement>. */ | |
50 public List getElements() { | |
51 List list = new ArrayList(); | |
52 list.addAll(map.values()); | |
53 Collections.sort(list, new Comparator() { | |
54 public int compare(Object o1, Object o2) { | |
55 return ((ObjectHistogramElement) o1).compare((ObjectHistogramElement) o2); | |
56 } | |
57 }); | |
58 return list; | |
59 } | |
60 | |
61 public void print() { printOn(System.out); } | |
62 | |
63 public void printOn(PrintStream tty) { | |
64 List list = getElements(); | |
65 ObjectHistogramElement.titleOn(tty); | |
66 Iterator iterator = list.listIterator(); | |
67 while (iterator.hasNext()) { | |
68 ((ObjectHistogramElement) iterator.next()).printOn(tty); | |
69 } | |
70 } | |
71 } |