| /* |
| * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.oops; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| public class ObjectHistogram implements HeapVisitor { |
| |
| public ObjectHistogram() { map = new HashMap(); } |
| |
| private HashMap map; |
| |
| public void prologue(long size) {} |
| |
| public boolean doObj(Oop obj) { |
| Klass klass = obj.getKlass(); |
| if (!map.containsKey(klass)) map.put(klass, new ObjectHistogramElement(klass)); |
| ((ObjectHistogramElement) map.get(klass)).updateWith(obj); |
| return false; |
| } |
| |
| public void epilogue() {} |
| |
| /** Call this after the iteration is complete to obtain the |
| ObjectHistogramElements in descending order of total heap size |
| consumed in the form of a List<ObjectHistogramElement>. */ |
| public List getElements() { |
| List list = new ArrayList(); |
| list.addAll(map.values()); |
| Collections.sort(list, new Comparator() { |
| public int compare(Object o1, Object o2) { |
| return ((ObjectHistogramElement) o1).compare((ObjectHistogramElement) o2); |
| } |
| }); |
| return list; |
| } |
| |
| public void print() { printOn(System.out); } |
| |
| public void printOn(PrintStream tty) { |
| List list = getElements(); |
| ObjectHistogramElement.titleOn(tty); |
| Iterator iterator = list.listIterator(); |
| int num=0; |
| int totalCount=0; |
| int totalSize=0; |
| while (iterator.hasNext()) { |
| ObjectHistogramElement el = (ObjectHistogramElement) iterator.next(); |
| num++; |
| totalCount+=el.getCount(); |
| totalSize+=el.getSize(); |
| tty.print(num + ":" + "\t\t"); |
| el.printOn(tty); |
| } |
| tty.println("Total : " + "\t" + totalCount + "\t" + totalSize); |
| } |
| } |