Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/oops/JumpData.java @ 3945:8ed53447f690
Merge
author | iveresov |
---|---|
date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | f6f3bb0ee072 |
children | 4bec1b1f7b33 |
comparison
equal
deleted
inserted
replaced
3929:f94227b6117b | 3945:8ed53447f690 |
---|---|
1 /* | |
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. | |
3 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. | |
4 * | |
5 * | |
6 * | |
7 * | |
8 * | |
9 * | |
10 * | |
11 * | |
12 * | |
13 * | |
14 * | |
15 * | |
16 * | |
17 * | |
18 * | |
19 * | |
20 * | |
21 * | |
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 // JumpData | |
35 // | |
36 // A JumpData is used to access profiling information for a direct | |
37 // branch. It is a counter, used for counting the number of branches, | |
38 // plus a data displacement, used for realigning the data pointer to | |
39 // the corresponding target bci. | |
40 public class JumpData extends ProfileData { | |
41 static final int takenOffSet = 0; | |
42 static final int displacementOffSet = 1; | |
43 static final int jumpCellCount = 2; | |
44 | |
45 public JumpData(DataLayout layout) { | |
46 super(layout); | |
47 //assert(layout.tag() == DataLayout.jumpDataTag || | |
48 // layout.tag() == DataLayout.branchDataTag, "wrong type"); | |
49 } | |
50 | |
51 static int staticCellCount() { | |
52 return jumpCellCount; | |
53 } | |
54 | |
55 public int cellCount() { | |
56 return staticCellCount(); | |
57 } | |
58 | |
59 // Direct accessor | |
60 int taken() { | |
61 return uintAt(takenOffSet); | |
62 } | |
63 | |
64 int displacement() { | |
65 return intAt(displacementOffSet); | |
66 } | |
67 | |
68 // Code generation support | |
69 static int takenOffset() { | |
70 return cellOffset(takenOffSet); | |
71 } | |
72 | |
73 static int displacementOffset() { | |
74 return cellOffset(displacementOffSet); | |
75 } | |
76 | |
77 public void printDataOn(PrintStream st) { | |
78 printShared(st, "JumpData"); | |
79 st.println("taken(" + taken() + ") displacement(" + displacement() + ")"); | |
80 } | |
81 } |