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annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/InlineDataRecorder.java @ 4142:bc8527f3071c

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Adjust code base to new level of warnings.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 18 Dec 2011 05:24:06 +0100
parents e233f5660da4
children
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1 /*
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2 * Copyright (c) 2007, 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.
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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.
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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).
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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.
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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.
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22 */
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23 package com.sun.max.asm;
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24
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25 import java.io.*;
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26 import java.util.*;
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27
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28 import com.sun.max.program.*;
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29
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30 /**
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31 * A facility for recording inline data descriptors associated with a sequence of assembled code.
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32 * The recorded descriptors described the structure of some contiguous inline data encoded
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33 * in the assembled code.
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34 */
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35 public class InlineDataRecorder {
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36
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37 private List<InlineDataDescriptor> descriptors;
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38 private boolean normalized;
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39
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40 /**
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41 * Adds an inline data descriptor to this object.
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42 */
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43 public void add(InlineDataDescriptor inlineData) {
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44 if (inlineData.size() != 0) {
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45 if (descriptors == null) {
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46 descriptors = new ArrayList<>();
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47 }
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48 descriptors.add(inlineData);
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49 normalized = false;
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50 }
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51 }
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52
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53 /**
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54 * Gets the sequence of inline data descriptors derived from the descriptors that have been
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55 * {@linkplain #add(InlineDataDescriptor) added} to this object. The returned sequence is comprised of
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56 * non-overlapping descriptors (i.e. the range implied by each descriptor's
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57 * {@linkplain InlineDataDescriptor#startPosition() start} and {@linkplain InlineDataDescriptor#size() size} is
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58 * disjoint from all other descriptors) that are sorted in ascending order of their
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59 * {@linkplain InlineDataDescriptor#startPosition() start} positions.
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60 *
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61 * @return null if no descriptors have been added to this object
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62 */
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63 public List<InlineDataDescriptor> descriptors() {
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64 if (!normalized) {
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65 normalize();
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66 }
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67 return descriptors;
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68 }
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69
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70 /**
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71 * Gets the result of {@link #descriptors()} encoded as a byte array in the format described
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72 * {@linkplain InlineDataDescriptor here}.
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73 */
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74 public byte[] encodedDescriptors() {
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75 if (descriptors == null) {
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76 return null;
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77 }
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78 try {
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79 normalize();
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80 final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
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81 final DataOutputStream dataOutputStream = new DataOutputStream(byteArrayOutputStream);
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82 dataOutputStream.writeInt(descriptors.size());
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83 for (InlineDataDescriptor inlineDataDescriptor : descriptors) {
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84 inlineDataDescriptor.writeTo(dataOutputStream);
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85 }
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86 final byte[] result = byteArrayOutputStream.toByteArray();
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87 return result;
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88 } catch (IOException ioException) {
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89 throw ProgramError.unexpected(ioException);
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90 }
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91 }
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92
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93 private void normalize() {
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94 if (descriptors != null && !normalized) {
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95 final SortedSet<InlineDataDescriptor> sortedEntries = new TreeSet<>(descriptors);
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96 final List<InlineDataDescriptor> entries = new ArrayList<>(descriptors.size());
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97 int lastEnd = 0;
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98 for (InlineDataDescriptor inlineDataDescriptor : sortedEntries) {
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99 if (inlineDataDescriptor.startPosition() >= lastEnd) {
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100 entries.add(inlineDataDescriptor);
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101 lastEnd = inlineDataDescriptor.endPosition();
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102 }
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103 }
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104 descriptors = entries;
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105 normalized = true;
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106 }
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107 }
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108 }