Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/BranchData.java @ 7587:4a916f2ce331
8003985: Support @Contended Annotation - JEP 142
Summary: HotSpot changes to support @Contended annotation.
Reviewed-by: coleenp, kvn, jrose
Contributed-by: Aleksey Shipilev <aleksey.shipilev@oracle.com>
author | jwilhelm |
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date | Mon, 14 Jan 2013 15:17:47 +0100 |
parents | b9a9ed0f8eeb |
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3939 | 1 /* |
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2 * Copyright (c) 2011, 2012, 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 // BranchData | |
35 // | |
36 // A BranchData is used to access profiling data for a two-way branch. | |
37 // It consists of taken and notTaken counts as well as a data displacement | |
38 // for the taken case. | |
39 public class BranchData extends JumpData { | |
40 | |
41 static final int notTakenOffSet = jumpCellCount; | |
42 static final int branchCellCount = notTakenOffSet + 1; | |
43 | |
44 public BranchData(DataLayout layout) { | |
45 super(layout); | |
46 //assert(layout.tag() == DataLayout.branchDataTag, "wrong type"); | |
47 } | |
48 | |
49 static int staticCellCount() { | |
50 return branchCellCount; | |
51 } | |
52 | |
53 public int cellCount() { | |
54 return staticCellCount(); | |
55 } | |
56 | |
57 // Direct accessor | |
58 int notTaken() { | |
59 return uintAt(notTakenOffSet); | |
60 } | |
61 | |
62 // Code generation support | |
63 static int notTakenOffset() { | |
64 return cellOffset(notTakenOffSet); | |
65 } | |
66 static int branchDataSize() { | |
67 return cellOffset(branchCellCount); | |
68 } | |
69 | |
70 public void printDataOn(PrintStream st) { | |
71 printShared(st, "BranchData"); | |
72 st.println("taken(" + taken() + ") displacement(" + displacement() + ")"); | |
73 tab(st); | |
74 st.println("not taken(" + notTaken() + ")"); | |
75 } | |
76 } |