Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/tools/ObjectHistogram.java @ 17524:89152779163c
Merge with jdk8-b132
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 15 Oct 2014 11:59:32 +0200 |
parents | 4ca6dc0799b6 |
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0 | 1 /* |
17524 | 2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.tools; | |
26 | |
27 import sun.jvm.hotspot.debugger.*; | |
28 import sun.jvm.hotspot.oops.*; | |
29 import sun.jvm.hotspot.runtime.*; | |
30 import java.io.PrintStream; | |
31 | |
32 /** A sample tool which uses the Serviceability Agent's APIs to obtain | |
33 an object histogram from a remote or crashed VM. */ | |
34 public class ObjectHistogram extends Tool { | |
35 | |
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36 public ObjectHistogram() { |
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37 super(); |
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38 } |
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39 |
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40 public ObjectHistogram(JVMDebugger d) { |
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41 super(d); |
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42 } |
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43 |
0 | 44 public void run() { |
45 run(System.out, System.err); | |
46 } | |
47 | |
48 public void run(PrintStream out, PrintStream err) { | |
49 // Ready to go with the database... | |
50 ObjectHeap heap = VM.getVM().getObjectHeap(); | |
51 sun.jvm.hotspot.oops.ObjectHistogram histogram = | |
52 new sun.jvm.hotspot.oops.ObjectHistogram(); | |
53 err.println("Iterating over heap. This may take a while..."); | |
54 long startTime = System.currentTimeMillis(); | |
55 heap.iterate(histogram); | |
56 long endTime = System.currentTimeMillis(); | |
57 histogram.printOn(out); | |
58 float secs = (float) (endTime - startTime) / 1000.0f; | |
59 err.println("Heap traversal took " + secs + " seconds."); | |
60 } | |
61 | |
62 public static void main(String[] args) { | |
63 ObjectHistogram oh = new ObjectHistogram(); | |
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64 oh.execute(args); |
0 | 65 } |
66 } |