Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/CounterData.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 4bec1b1f7b33 |
| children | b9a9ed0f8eeb |
| rev | line source |
|---|---|
| 3939 | 1 /* |
| 2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. | |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3939 | 4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
| 3939 | 8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
| 3939 | 14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 3939 | 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. |
| 3939 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.oops; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 // CounterData | |
| 35 // | |
| 36 // A CounterData corresponds to a simple counter. | |
| 37 public class CounterData extends BitData { | |
| 38 | |
| 39 static final int countOff = 0; | |
| 40 static final int counterCellCount = 1; | |
| 41 | |
| 42 public CounterData(DataLayout layout) { | |
| 43 super(layout); | |
| 44 } | |
| 45 | |
| 46 static int staticCellCount() { | |
| 47 return counterCellCount; | |
| 48 } | |
| 49 | |
| 50 public int cellCount() { | |
| 51 return staticCellCount(); | |
| 52 } | |
| 53 | |
| 54 // Direct accessor | |
| 55 int count() { | |
| 56 return uintAt(countOff); | |
| 57 } | |
| 58 | |
| 59 // Code generation support | |
| 60 static int countOffset() { | |
| 61 return cellOffset(countOff); | |
| 62 } | |
| 63 static int counterDataSize() { | |
| 64 return cellOffset(counterCellCount); | |
| 65 } | |
| 66 | |
| 67 public void printDataOn(PrintStream st) { | |
| 68 printShared(st, "CounterData"); | |
| 69 st.println("count(" + count() + ")"); | |
| 70 } | |
| 71 } |