Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/ProgressiveHeapVisitor.java @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | c18cbe5936b8 |
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2 * Copyright (c) 2000, 2006, 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 |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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.utilities; | |
26 | |
27 import sun.jvm.hotspot.memory.*; | |
28 import sun.jvm.hotspot.oops.*; | |
29 | |
30 /** This class wraps a user's chosen HeapVisitor with the | |
31 functionality that a chosen "thunk" is called periodically during | |
32 the heap traversal. This allows a progress bar to be displayed | |
33 during long heap scans. */ | |
34 | |
35 public class ProgressiveHeapVisitor implements HeapVisitor { | |
36 private HeapVisitor userHeapVisitor; | |
37 private HeapProgressThunk thunk; | |
38 private long usedSize; | |
39 private long visitedSize; | |
40 private double lastNotificationFraction; | |
41 private static double MINIMUM_NOTIFICATION_FRACTION = 0.01; | |
42 | |
43 public ProgressiveHeapVisitor(HeapVisitor userHeapVisitor, | |
44 HeapProgressThunk thunk) { | |
45 this.userHeapVisitor = userHeapVisitor; | |
46 this.thunk = thunk; | |
47 } | |
48 | |
49 public void prologue(long usedSize) { | |
50 this.usedSize = usedSize; | |
51 visitedSize = 0; | |
52 userHeapVisitor.prologue(usedSize); | |
53 } | |
54 | |
55 public boolean doObj(Oop obj) { | |
56 userHeapVisitor.doObj(obj); | |
57 visitedSize += obj.getObjectSize(); | |
58 double curFrac = (double) visitedSize / (double) usedSize; | |
59 if (curFrac > lastNotificationFraction + MINIMUM_NOTIFICATION_FRACTION) { | |
60 thunk.heapIterationFractionUpdate(curFrac); | |
61 lastNotificationFraction = curFrac; | |
62 } | |
63 return false; | |
64 } | |
65 | |
66 public void epilogue() { | |
67 userHeapVisitor.epilogue(); | |
68 thunk.heapIterationComplete(); | |
69 } | |
70 } |