mcs/tools/linker/Mono.Linker/LinkContext.cs

   1 //
   2 // LinkContext.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@gmail.com)
   6 //
   7 // (C) 2006 Jb Evain
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.IO;
  32
  33 using Mono.Cecil;
  34 using Mono.Cecil.Cil;
  35
  36 namespace Mono.Linker {
  37
  38         public class LinkContext {
  39
  40                 Pipeline _pipeline;
  41                 AssemblyAction _coreAction;
  42                 Hashtable _actions;
  43                 string _outputDirectory;
  44                 Hashtable _parameters;
  45                 bool _linkSymbols;
  46
  47                 AssemblyResolver _resolver;
  48
  49                 ReaderParameters _readerParameters;
  50                 ISymbolReaderProvider _symbolReaderProvider;
  51                 ISymbolWriterProvider _symbolWriterProvider;
  52
  53                 AnnotationStore _annotations;
  54
  55                 public Pipeline Pipeline {
  56                         get { return _pipeline; }
  57                 }
  58
  59                 public AnnotationStore Annotations {
  60                         get { return _annotations; }
  61                 }
  62
  63                 public string OutputDirectory {
  64                         get { return _outputDirectory; }
  65                         set { _outputDirectory = value; }
  66                 }
  67
  68                 public AssemblyAction CoreAction {
  69                         get { return _coreAction; }
  70                         set { _coreAction = value; }
  71                 }
  72
  73                 public bool LinkSymbols {
  74                         get { return _linkSymbols; }
  75                         set { _linkSymbols = value; }
  76                 }
  77
  78                 public IDictionary Actions {
  79                         get { return _actions; }
  80                 }
  81
  82                 public AssemblyResolver Resolver {
  83                         get { return _resolver; }
  84                 }
  85
  86                 public ISymbolReaderProvider SymbolReaderProvider {
  87                         get { return _symbolReaderProvider; }
  88                         set {
  89                                 _symbolReaderProvider = value;
  90                                 _readerParameters.SymbolReaderProvider = value;
  91                         }
  92                 }
  93
  94                 public ISymbolWriterProvider SymbolWriterProvider {
  95                         get { return _symbolWriterProvider; }
  96                         set { _symbolWriterProvider = value; }
  97                 }
  98
  99                 public LinkContext (Pipeline pipeline)
 100                         : this (pipeline, new AssemblyResolver ())
 101                 {
 102                 }
 103
 104                 public LinkContext (Pipeline pipeline, AssemblyResolver resolver)
 105                 {
 106                         _pipeline = pipeline;
 107                         _resolver = resolver;
 108                         _actions = new Hashtable ();
 109                         _parameters = new Hashtable ();
 110                         _annotations = new AnnotationStore ();
 111                         _readerParameters = new ReaderParameters {
 112                                 AssemblyResolver = _resolver,
 113                         };
 114                 }
 115
 116                 public TypeDefinition GetType (string fullName)
 117                 {
 118                         int pos = fullName.IndexOf (",");
 119                         fullName = fullName.Replace ("+", "/");
 120                         if (pos == -1) {
 121                                 foreach (AssemblyDefinition asm in GetAssemblies ()) {
 122                                         var type = asm.MainModule.GetType (fullName);
 123                                         if (type != null)
 124                                                 return type;
 125                                 }
 126
 127                                 return null;
 128                         }
 129
 130                         string asmname = fullName.Substring (pos + 1);
 131                         fullName = fullName.Substring (0, pos);
 132                         AssemblyDefinition assembly = Resolve (AssemblyNameReference.Parse (asmname));
 133                         return assembly.MainModule.GetType (fullName);
 134                 }
 135
 136                 public AssemblyDefinition Resolve (string name)
 137                 {
 138                         if (File.Exists (name)) {
 139                                 AssemblyDefinition assembly = AssemblyDefinition.ReadAssembly (name, _readerParameters);
 140                                 _resolver.CacheAssembly (assembly);
 141                                 return assembly;
 142                         }
 143
 144                         return Resolve (new AssemblyNameReference (name, new Version ()));
 145                 }
 146
 147                 public AssemblyDefinition Resolve (IMetadataScope scope)
 148                 {
 149                         AssemblyNameReference reference = GetReference (scope);
 150
 151                         AssemblyDefinition assembly = _resolver.Resolve (reference, _readerParameters);
 152
 153                         if (SeenFirstTime (assembly)) {
 154                                 SafeReadSymbols (assembly);
 155                                 SetAction (assembly);
 156                         }
 157
 158                         return assembly;
 159                 }
 160
 161                 bool SeenFirstTime (AssemblyDefinition assembly)
 162                 {
 163                         return !_annotations.HasAction (assembly);
 164                 }
 165
 166                 public void SafeReadSymbols (AssemblyDefinition assembly)
 167                 {
 168                         if (!_linkSymbols)
 169                                 return;
 170
 171                         try {
 172                                 if (_symbolReaderProvider != null) {
 173                                         var symbolReader = _symbolReaderProvider.GetSymbolReader (
 174                                                 assembly.MainModule,
 175                                                 assembly.MainModule.FullyQualifiedName);
 176
 177                                         _annotations.AddSymbolReader (assembly, symbolReader);
 178                                         assembly.MainModule.ReadSymbols (symbolReader);
 179                                 } else
 180                                         assembly.MainModule.ReadSymbols ();
 181                         } catch {}
 182                 }
 183
 184                 static AssemblyNameReference GetReference (IMetadataScope scope)
 185                 {
 186                         AssemblyNameReference reference;
 187                         if (scope is ModuleDefinition) {
 188                                 AssemblyDefinition asm = ((ModuleDefinition) scope).Assembly;
 189                                 reference = asm.Name;
 190                         } else
 191                                 reference = (AssemblyNameReference) scope;
 192
 193                         return reference;
 194                 }
 195
 196                 void SetAction (AssemblyDefinition assembly)
 197                 {
 198                         AssemblyAction action = AssemblyAction.Link;
 199
 200                         AssemblyNameDefinition name = assembly.Name;
 201
 202                         if (_actions.Contains (name.Name))
 203                                 action = (AssemblyAction) _actions [name.Name];
 204                         else if (IsCore (name))
 205                                 action = _coreAction;
 206
 207                         _annotations.SetAction (assembly, action);
 208                 }
 209
 210                 static bool IsCore (AssemblyNameReference name)
 211                 {
 212                         switch (name.Name) {
 213                         case "mscorlib":
 214                         case "Accessibility":
 215                         case "Mono.Security":
 216                                 return true;
 217                         default:
 218                                 return name.Name.StartsWith ("System")
 219                                         || name.Name.StartsWith ("Microsoft");
 220                         }
 221                 }
 222
 223                 public AssemblyDefinition [] GetAssemblies ()
 224                 {
 225                         IDictionary cache = _resolver.AssemblyCache;
 226                         AssemblyDefinition [] asms = new AssemblyDefinition [cache.Count];
 227                         cache.Values.CopyTo (asms, 0);
 228                         return asms;
 229                 }
 230
 231                 public void SetParameter (string key, string value)
 232                 {
 233                         _parameters [key] = value;
 234                 }
 235
 236                 public bool HasParameter (string key)
 237                 {
 238                         return _parameters.Contains (key);
 239                 }
 240
 241                 public string GetParameter (string key)
 242                 {
 243                         return (string) _parameters [key];
 244                 }
 245         }
 246 }