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1 /* |
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2 * Copyright (c) 2004-2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 |
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18 using System; |
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19 using System.Collections.Generic; |
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20 using System.Text; |
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21 using System.IO; |
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22 using SymbianUtils; |
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23 using SymbianUtils.Range; |
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24 using SymbianUtils.Tracer; |
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25 using SymbianUtils.FileTypes; |
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26 using SymbianStructuresLib.Debug.Symbols; |
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27 using SymbianStructuresLib.CodeSegments; |
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28 using SymbianSymbolLib.DbgEnginePlugin; |
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29 using SymbianSymbolLib.SourceManagement.Source; |
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30 using SymbianSymbolLib.QueryAPI; |
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31 |
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32 namespace SymbianSymbolLib.Relocator |
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33 { |
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34 internal class SymbolRelocator : IEnumerable<SymSourceAndCollection> |
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35 { |
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36 #region Constructors |
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37 public SymbolRelocator( SymbolPlugin aPlugin ) |
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38 { |
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39 iPlugin = aPlugin; |
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40 } |
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41 #endregion |
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42 |
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43 #region API |
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44 public SymbolCollection Activate( CodeSegDefinition aCodeSegment ) |
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45 { |
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46 SymbolCollection ret = null; |
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47 |
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48 // Find the corresponding code seg |
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49 SymSourceAndCollection pair = SourceManager[ aCodeSegment ]; |
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50 if ( pair != null ) |
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51 { |
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52 SymbolCollection col = pair.Collection; |
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53 lock ( col.SyncRoot ) |
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54 { |
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55 if ( col.IsFixed ) |
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56 { |
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57 // Cannot activate a fixed code segment - TODO: should this return "true", i.e. already activated? |
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58 } |
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59 else |
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60 { |
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61 bool safe = CheckSafeToActivate( aCodeSegment ); |
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62 if ( safe ) |
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63 { |
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64 // Deep copy the collection |
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65 SymbolCollection dupe = SymbolCollection.NewCopy( iPlugin.ProvisioningManager.IdAllocator, col ); |
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66 |
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67 // Set new process-specific relocated base address |
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68 dupe.Relocate( aCodeSegment.Base ); |
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69 |
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70 // Save so that we can unload it later |
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71 pair = new SymSourceAndCollection( pair, dupe ); |
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72 AddToActivationList( pair, aCodeSegment ); |
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73 |
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74 // We managed to activate a binary, so return the collection |
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75 ret = dupe; |
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76 |
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77 iPlugin.Trace( "[S] ACTIVATE - {0}", aCodeSegment ); |
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78 } |
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79 } |
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80 } |
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81 } |
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82 // |
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83 return ret; |
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84 } |
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85 |
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86 public bool Deactivate( CodeSegDefinition aCodeSegment ) |
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87 { |
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88 bool activated = iActivationLUT.ContainsKey( aCodeSegment ); |
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89 if ( activated ) |
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90 { |
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91 SymSourceAndCollection pair = iActivationLUT[ aCodeSegment ]; |
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92 // |
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93 lock ( iActivatedCollections ) |
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94 { |
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95 iActivatedCollections.Remove( pair.Collection ); |
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96 } |
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97 lock ( iActivationLUT ) |
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98 { |
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99 iActivationLUT.Remove( aCodeSegment ); |
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100 } |
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101 // |
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102 iPlugin.Trace( "[S] DEACTIVATE - {0} @ {1}", pair.Collection.FileName, aCodeSegment ); |
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103 } |
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104 // |
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105 return activated; |
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106 } |
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107 #endregion |
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108 |
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109 #region Properties |
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110 public SymbolCollectionList CollectionList |
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111 { |
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112 get { return iActivatedCollections; } |
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113 } |
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114 |
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115 public int Count |
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116 { |
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117 get |
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118 { |
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119 lock ( iActivatedCollections ) |
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120 { |
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121 lock ( iActivationLUT ) |
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122 { |
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123 System.Diagnostics.Debug.Assert( iActivatedCollections.Count == iActivationLUT.Count ); |
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124 return iActivationLUT.Count; |
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125 } |
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126 } |
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127 } |
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128 } |
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129 #endregion |
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130 |
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131 #region Internal methods |
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132 internal SymbolPlugin Plugin |
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133 { |
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134 get { return iPlugin; } |
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135 } |
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136 |
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137 internal SymSourceManager SourceManager |
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138 { |
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139 get { return Plugin.SourceManager; } |
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140 } |
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141 |
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142 private void AddToActivationList( SymSourceAndCollection aEntry, CodeSegDefinition aCodeSegment ) |
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143 { |
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144 lock ( iActivatedCollections ) |
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145 { |
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146 iActivatedCollections.AddAndBuildCache( aEntry.Collection ); |
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147 } |
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148 lock ( iActivationLUT ) |
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149 { |
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150 iActivationLUT.Add( aCodeSegment, aEntry ); |
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151 } |
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152 } |
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153 |
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154 private bool CheckSafeToActivate( CodeSegDefinition aCodeSegment ) |
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155 { |
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156 lock ( iActivationLUT ) |
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157 { |
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158 bool alreadyExists = iActivationLUT.ContainsKey( aCodeSegment ); |
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159 if ( alreadyExists ) |
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160 { |
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161 // Specified code segment already activated |
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162 return false; |
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163 } |
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164 else |
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165 { |
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166 // We must check that there's no overlap in activation ranges between code segments. |
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167 foreach ( KeyValuePair<CodeSegDefinition, SymSourceAndCollection> kvp in iActivationLUT ) |
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168 { |
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169 AddressRange range = kvp.Key; |
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170 if ( range.Contains( aCodeSegment ) ) |
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171 { |
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172 // Overlaps with existing activated code segment |
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173 return false; |
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174 } |
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175 } |
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176 } |
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177 // |
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178 return true; |
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179 } |
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180 } |
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181 #endregion |
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182 |
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183 #region From IEnumerable<SymSourceAndCollection> |
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184 public IEnumerator<SymSourceAndCollection> GetEnumerator() |
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185 { |
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186 foreach ( KeyValuePair<CodeSegDefinition, SymSourceAndCollection> kvp in iActivationLUT ) |
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187 { |
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188 yield return kvp.Value; |
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189 } |
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190 } |
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191 |
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192 System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() |
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193 { |
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194 foreach ( KeyValuePair<CodeSegDefinition, SymSourceAndCollection> kvp in iActivationLUT ) |
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195 { |
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196 yield return kvp.Value; |
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197 } |
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198 } |
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199 #endregion |
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200 |
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201 #region Data members |
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202 private readonly SymbolPlugin iPlugin; |
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203 private SymbolCollectionList iActivatedCollections = new SymbolCollectionList(); |
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204 private Dictionary<CodeSegDefinition, SymSourceAndCollection> iActivationLUT = new Dictionary<CodeSegDefinition, SymSourceAndCollection>(); |
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205 #endregion |
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206 } |
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207 } |