Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/ProgressiveHeapVisitor.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
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| 0 | 1 /* |
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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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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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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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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 } |