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 { _symbolReaderProvider = value; }
  89                 }
  90
  91                 public ISymbolWriterProvider SymbolWriterProvider {
  92                         get { return _symbolWriterProvider; }
  93                         set { _symbolWriterProvider = value; }
  94                 }
  95
  96                 public LinkContext (Pipeline pipeline)
  97                         : this (pipeline, new AssemblyResolver ())
  98                 {
  99                 }
 100
 101                 public LinkContext (Pipeline pipeline, AssemblyResolver resolver)
 102                 {
 103                         _pipeline = pipeline;
 104                         _resolver = resolver;
 105                         _actions = new Hashtable ();
 106                         _parameters = new Hashtable ();
 107                         _annotations = new AnnotationStore ();
 108                         _readerParameters = new ReaderParameters {
 109                                 AssemblyResolver = _resolver,
 110                         };
 111                 }
 112
 113                 public TypeDefinition GetType (string fullName)
 114                 {
 115                         int pos = fullName.IndexOf (",");
 116                         fullName = fullName.Replace ("+", "/");
 117                         if (pos == -1) {
 118                                 foreach (AssemblyDefinition asm in GetAssemblies ()) {
 119                                         var type = asm.MainModule.GetType (fullName);
 120                                         if (type != null)
 121                                                 return type;
 122                                 }
 123
 124                                 return null;
 125                         }
 126
 127                         string asmname = fullName.Substring (pos + 1);
 128                         fullName = fullName.Substring (0, pos);
 129                         AssemblyDefinition assembly = Resolve (AssemblyNameReference.Parse (asmname));
 130                         return assembly.MainModule.GetType (fullName);
 131                 }
 132
 133                 public AssemblyDefinition Resolve (string name)
 134                 {
 135                         if (File.Exists (name)) {
 136                                 AssemblyDefinition assembly = AssemblyDefinition.ReadAssembly (name, _readerParameters);
 137                                 _resolver.CacheAssembly (assembly);
 138                                 return assembly;
 139                         }
 140
 141                         return Resolve (new AssemblyNameReference (name, new Version ()));
 142                 }
 143
 144                 public AssemblyDefinition Resolve (IMetadataScope scope)
 145                 {
 146                         AssemblyNameReference reference = GetReference (scope);
 147                         try {
 148                                 AssemblyDefinition assembly = _resolver.Resolve (reference, _readerParameters);
 149
 150                                 if (SeenFirstTime (assembly)) {
 151                                         SafeReadSymbols (assembly);
 152                                         SetAction (assembly);
 153                                 }
 154
 155                                 return assembly;
 156                         }
 157                         catch {
 158                                 throw new AssemblyResolutionException (reference);
 159                         }
 160                 }
 161
 162                 bool SeenFirstTime (AssemblyDefinition assembly)
 163                 {
 164                         return !_annotations.HasAction (assembly);
 165                 }
 166
 167                 public void SafeReadSymbols (AssemblyDefinition assembly)
 168                 {
 169                         if (!_linkSymbols)
 170                                 return;
 171
 172                         if (assembly.MainModule.HasSymbols)
 173                                 return;
 174
 175                         try {
 176                                 if (_symbolReaderProvider != null) {
 177                                         var symbolReader = _symbolReaderProvider.GetSymbolReader (
 178                                                 assembly.MainModule,
 179                                                 assembly.MainModule.FullyQualifiedName);
 180
 181                                         _annotations.AddSymbolReader (assembly, symbolReader);
 182                                         assembly.MainModule.ReadSymbols (symbolReader);
 183                                 } else
 184                                         assembly.MainModule.ReadSymbols ();
 185                         } catch {}
 186                 }
 187
 188                 static AssemblyNameReference GetReference (IMetadataScope scope)
 189                 {
 190                         AssemblyNameReference reference;
 191                         if (scope is ModuleDefinition) {
 192                                 AssemblyDefinition asm = ((ModuleDefinition) scope).Assembly;
 193                                 reference = asm.Name;
 194                         } else
 195                                 reference = (AssemblyNameReference) scope;
 196
 197                         return reference;
 198                 }
 199
 200                 void SetAction (AssemblyDefinition assembly)
 201                 {
 202                         AssemblyAction action = AssemblyAction.Link;
 203
 204                         AssemblyNameDefinition name = assembly.Name;
 205
 206                         if (_actions.Contains (name.Name))
 207                                 action = (AssemblyAction) _actions [name.Name];
 208                         else if (IsCore (name))
 209                                 action = _coreAction;
 210
 211                         _annotations.SetAction (assembly, action);
 212                 }
 213
 214                 static bool IsCore (AssemblyNameReference name)
 215                 {
 216                         switch (name.Name) {
 217                         case "mscorlib":
 218                         case "Accessibility":
 219                         case "Mono.Security":
 220                                 return true;
 221                         default:
 222                                 return name.Name.StartsWith ("System")
 223                                         || name.Name.StartsWith ("Microsoft");
 224                         }
 225                 }
 226
 227                 public AssemblyDefinition [] GetAssemblies ()
 228                 {
 229                         IDictionary cache = _resolver.AssemblyCache;
 230                         AssemblyDefinition [] asms = new AssemblyDefinition [cache.Count];
 231                         cache.Values.CopyTo (asms, 0);
 232                         return asms;
 233                 }
 234
 235                 public void SetParameter (string key, string value)
 236                 {
 237                         _parameters [key] = value;
 238                 }
 239
 240                 public bool HasParameter (string key)
 241                 {
 242                         return _parameters.Contains (key);
 243                 }
 244
 245                 public string GetParameter (string key)
 246                 {
 247                         return (string) _parameters [key];
 248                 }
 249         }
 250 }