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3939
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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4 *
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5 *
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6 *
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7 *
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8 *
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9 *
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10 *
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11 *
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12 *
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13 *
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14 *
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15 *
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16 *
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17 *
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18 *
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19 *
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20 *
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21 *
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.oops;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 // ArrayData
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35 //
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36 // A ArrayData is a base class for accessing profiling data which does
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37 // not have a statically known size. It consists of an array length
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38 // and an array start.
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39 abstract class ArrayData extends ProfileData {
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40
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41 static final int arrayLenOffSet = 0;
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42 static final int arrayStartOffSet = 1;
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43
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44 int arrayUintAt(int index) {
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45 int aindex = index + arrayStartOffSet;
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46 return uintAt(aindex);
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47 }
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48 int arrayIntAt(int index) {
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49 int aindex = index + arrayStartOffSet;
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50 return intAt(aindex);
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51 }
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52 Oop arrayOopAt(int index) {
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53 int aindex = index + arrayStartOffSet;
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54 return oopAt(aindex);
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55 }
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56
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57 // Code generation support for subclasses.
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58 static int arrayElementOffset(int index) {
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59 return cellOffset(arrayStartOffSet + index);
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60 }
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61
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62 ArrayData(DataLayout layout) {
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63 super(layout);
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64 }
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65
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66 static int staticCellCount() {
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67 return -1;
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68 }
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69
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70 int arrayLen() {
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71 return intAt(arrayLenOffSet);
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72 }
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73
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74 public int cellCount() {
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75 return arrayLen() + 1;
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76 }
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77
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78 // Code generation support
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79 static int arrayLenOffset() {
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80 return cellOffset(arrayLenOffSet);
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81 }
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82 static int arrayStartOffset() {
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83 return cellOffset(arrayStartOffSet);
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84 }
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85
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86 }
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