Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/InlineDataRecorder.java @ 4297:874fcc2ddd9d
Use HotSpot disassmblers for native code and bytecode
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Wed, 18 Jan 2012 20:08:08 -0800 |
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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 } |