Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/dis/AddressMapper.java @ 4235:23f41c48b19b
Re-enabled Java cleaning in gate.
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 06 Jan 2012 14:22:57 +0100 |
parents | bc8527f3071c |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2008, 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.dis; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.sun.max.asm.gen.*; |
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28 |
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29 /** |
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30 * A facility for mapping addresses to {@linkplain DisassembledLabel labels} and {@linkplain DisassembledObject |
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31 * disassembled objects}. Labels are only used to identify addresses that are a) explicitly targeted by an operand of a |
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32 * disassembled object {@linkplain #add(DisassembledObject) added} to the map or b) explicitly |
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33 * {@linkplain #add(ImmediateArgument, String) added}. |
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34 */ |
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35 public class AddressMapper { |
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36 |
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37 private int serial; |
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38 private int unnamedLabels; |
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39 private final Map<ImmediateArgument, DisassembledObject> objectMap = new HashMap<>(); |
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40 private final Map<ImmediateArgument, DisassembledLabel> labelMap = new TreeMap<>(new Comparator<ImmediateArgument>() { |
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41 public int compare(ImmediateArgument o1, ImmediateArgument o2) { |
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42 final long l1 = o1.asLong(); |
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43 final long l2 = o2.asLong(); |
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44 if (l1 < l2) { |
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45 return -1; |
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46 } else if (l1 > l2) { |
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47 return 1; |
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48 } |
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49 return 0; |
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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 label for a given address. |
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55 * |
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56 * @param address the address for which a label is requested |
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57 * @return the label for {@code address} or null if no label exists for that address |
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58 */ |
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59 public synchronized DisassembledLabel labelAt(ImmediateArgument address) { |
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60 fixupUnnamedLabels(); |
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61 return labelMap.get(address); |
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62 } |
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63 |
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64 /** |
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65 * Gets the label for a given disassembled object. |
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66 * |
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67 * @param disassembledObject the disassembled object for which a label is requested |
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68 * @return the label corresponding to {@code disassembledObject}'s start address or null if no label exists for that address |
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69 */ |
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70 public synchronized DisassembledLabel labelAt(DisassembledObject disassembledObject) { |
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71 fixupUnnamedLabels(); |
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72 return labelAt(disassembledObject.startAddress()); |
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73 } |
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74 |
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75 /** |
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76 * Adds a mapping from a given address to a given name. |
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77 * |
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78 * @return the previous mapping (if any) for {@code address} |
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79 */ |
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80 public synchronized DisassembledLabel add(ImmediateArgument address, String name) { |
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81 return labelMap.put(address, new DisassembledLabel(address, name)); |
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82 } |
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83 |
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84 /** |
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85 * Adds a mapping for the address {@linkplain DisassembledObject#targetAddress() targeted} by a given disassembled object. |
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86 * If {@code disassembledObject} does not target another object, then no update is made to this mapping. |
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87 * |
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88 * @param disassembledObject the disassembled object to consider |
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89 */ |
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90 public void add(DisassembledObject disassembledObject) { |
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91 add(Arrays.asList(new DisassembledObject[] {disassembledObject})); |
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92 } |
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93 |
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94 /** |
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95 * Adds a mapping for the addresses {@linkplain DisassembledObject#targetAddress() targeted} by a given sequence of |
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96 * disassembled objects. If none of {@code disassembledObjects} target other objects, then no update is made to |
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97 * this mapping. |
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98 * |
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99 * @param disassembledObjects the disassembled objects to consider |
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100 */ |
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101 public synchronized void add(List<DisassembledObject> disassembledObjects) { |
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102 for (DisassembledObject disassembledObject : disassembledObjects) { |
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103 final ImmediateArgument address = disassembledObject.startAddress(); |
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104 objectMap.put(address, disassembledObject); |
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105 } |
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106 for (DisassembledObject disassembledObject : disassembledObjects) { |
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107 final ImmediateArgument targetAddress = disassembledObject.targetAddress(); |
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108 if (targetAddress != null) { |
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109 final DisassembledObject targetDisassembledObject = objectMap.get(targetAddress); |
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110 if (targetDisassembledObject == null) { |
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111 labelMap.remove(targetAddress); |
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112 } else { |
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113 DisassembledLabel label = labelMap.get(targetAddress); |
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114 if (label == null || label.target() != targetDisassembledObject) { |
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115 label = new UnnamedLabel(targetDisassembledObject); |
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116 final DisassembledLabel oldValue = labelMap.put(targetAddress, label); |
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117 if (!(oldValue instanceof UnnamedLabel)) { |
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118 unnamedLabels++; |
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119 } |
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120 } |
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121 } |
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122 } |
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123 } |
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124 } |
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125 |
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126 private static class UnnamedLabel extends DisassembledLabel { |
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127 UnnamedLabel(DisassembledObject targetDisassembledObject) { |
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128 super(targetDisassembledObject, "L?"); |
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129 } |
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130 } |
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131 |
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132 private void fixupUnnamedLabels() { |
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133 while (unnamedLabels != 0) { |
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134 for (Map.Entry<ImmediateArgument, DisassembledLabel> entry : labelMap.entrySet()) { |
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135 final DisassembledLabel label = entry.getValue(); |
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136 if (label instanceof UnnamedLabel) { |
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137 entry.setValue(new DisassembledLabel(label.target(), "L" + (++serial))); |
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138 unnamedLabels--; |
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139 } |
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140 } |
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141 } |
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142 } |
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143 |
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144 /** |
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145 * Computes the maximum length of any label name in this mapping. |
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146 */ |
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147 public synchronized int maximumLabelNameLength() { |
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148 fixupUnnamedLabels(); |
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149 int max = 0; |
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150 for (DisassembledLabel label : labelMap.values()) { |
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151 final String name = label.name(); |
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152 if (name.length() > max) { |
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153 max = name.length(); |
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154 } |
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155 } |
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156 return max; |
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157 } |
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158 } |