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comparison agent/src/share/classes/sun/jvm/hotspot/oops/ArrayData.java @ 3939:f6f3bb0ee072

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7088955: add C2 IR support to the SA Reviewed-by: kvn
author never
date Sun, 11 Sep 2011 14:48:24 -0700
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children 4bec1b1f7b33
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3938:e6b1331a51d2 3939:f6f3bb0ee072
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 // ArrayData
35 //
36 // A ArrayData is a base class for accessing profiling data which does
37 // not have a statically known size. It consists of an array length
38 // and an array start.
39 abstract class ArrayData extends ProfileData {
40
41 static final int arrayLenOffSet = 0;
42 static final int arrayStartOffSet = 1;
43
44 int arrayUintAt(int index) {
45 int aindex = index + arrayStartOffSet;
46 return uintAt(aindex);
47 }
48 int arrayIntAt(int index) {
49 int aindex = index + arrayStartOffSet;
50 return intAt(aindex);
51 }
52 Oop arrayOopAt(int index) {
53 int aindex = index + arrayStartOffSet;
54 return oopAt(aindex);
55 }
56
57 // Code generation support for subclasses.
58 static int arrayElementOffset(int index) {
59 return cellOffset(arrayStartOffSet + index);
60 }
61
62 ArrayData(DataLayout layout) {
63 super(layout);
64 }
65
66 static int staticCellCount() {
67 return -1;
68 }
69
70 int arrayLen() {
71 return intAt(arrayLenOffSet);
72 }
73
74 public int cellCount() {
75 return arrayLen() + 1;
76 }
77
78 // Code generation support
79 static int arrayLenOffset() {
80 return cellOffset(arrayLenOffSet);
81 }
82 static int arrayStartOffset() {
83 return cellOffset(arrayStartOffSet);
84 }
85
86 }