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.Collections;
  30 using System.IO;
  31 using Mono.Cecil;
  32
  33 namespace Mono.Linker {
  34
  35         public class LinkContext {
  36
  37                 Pipeline _pipeline;
  38                 AssemblyAction _coreAction;
  39                 Hashtable _actions;
  40                 string _outputDirectory;
  41                 Hashtable _parameters;
  42                 bool _linkSymbols;
  43
  44                 AssemblyResolver _resolver;
  45
  46                 public Pipeline Pipeline {
  47                         get { return _pipeline; }
  48                 }
  49
  50                 public string OutputDirectory {
  51                         get { return _outputDirectory; }
  52                         set { _outputDirectory = value; }
  53                 }
  54
  55                 public AssemblyAction CoreAction {
  56                         get { return _coreAction; }
  57                         set { _coreAction = value; }
  58                 }
  59
  60                 public bool LinkSymbols {
  61                         get { return _linkSymbols; }
  62                         set { _linkSymbols = value; }
  63                 }
  64
  65                 public IDictionary Actions {
  66                         get { return _actions; }
  67                 }
  68
  69                 public AssemblyResolver Resolver {
  70                         get { return _resolver; }
  71                 }
  72
  73                 public LinkContext (Pipeline pipeline)
  74                 {
  75                         _pipeline = pipeline;
  76                         _resolver = new AssemblyResolver ();
  77                         _actions = new Hashtable ();
  78                         _parameters = new Hashtable ();
  79                 }
  80
  81                 public TypeDefinition GetType (string type)
  82                 {
  83                         int pos = type.IndexOf (",");
  84                         type = type.Replace ("+", "/");
  85                         if (pos == -1) {
  86                                 foreach (AssemblyDefinition asm in GetAssemblies ())
  87                                         if (asm.MainModule.Types.Contains (type))
  88                                                 return asm.MainModule.Types [type];
  89
  90                                 return null;
  91                         }
  92
  93                         string asmname = type.Substring (pos + 1);
  94                         type = type.Substring (0, pos);
  95                         AssemblyDefinition assembly = Resolve (AssemblyNameReference.Parse (asmname));
  96                         return assembly.MainModule.Types [type];
  97                 }
  98
  99                 public AssemblyDefinition Resolve (string name)
 100                 {
 101                         if (File.Exists (name)) {
 102                                 AssemblyDefinition assembly = AssemblyFactory.GetAssembly (name);
 103                                 _resolver.CacheAssembly (assembly);
 104                                 SafeLoadSymbols (assembly);
 105                                 return assembly;
 106                         } else {
 107                                 AssemblyNameReference reference = new AssemblyNameReference ();
 108                                 reference.Name = name;
 109                                 return Resolve (reference);
 110                         }
 111                 }
 112
 113                 public AssemblyDefinition Resolve (IMetadataScope scope)
 114                 {
 115                         AssemblyNameReference reference = GetReference (scope);
 116
 117                         AssemblyDefinition assembly = _resolver.Resolve (reference);
 118
 119                         if (SeenFirstTime (assembly)) {
 120                                 SetAction (assembly);
 121                                 SafeLoadSymbols (assembly);
 122                         }
 123
 124                         return assembly;
 125                 }
 126
 127                 static void SafeLoadSymbols (AssemblyDefinition assembly)
 128                 {
 129                         try {
 130                                 assembly.MainModule.LoadSymbols ();
 131                                 Annotations.SetHasSymbols (assembly);
 132                         } catch {
 133                                 return; // resharper loves this
 134                         }
 135                 }
 136
 137                 static bool SeenFirstTime (AssemblyDefinition assembly)
 138                 {
 139                         return !Annotations.HasAction (assembly);
 140                 }
 141
 142                 static AssemblyNameReference GetReference (IMetadataScope scope)
 143                 {
 144                         AssemblyNameReference reference;
 145                         if (scope is ModuleDefinition) {
 146                                 AssemblyDefinition asm = ((ModuleDefinition) scope).Assembly;
 147                                 reference = asm.Name;
 148                         } else
 149                                 reference = (AssemblyNameReference) scope;
 150
 151                         return reference;
 152                 }
 153
 154                 void SetAction (AssemblyDefinition assembly)
 155                 {
 156                         AssemblyAction action = AssemblyAction.Link;
 157
 158                         AssemblyNameDefinition name = assembly.Name;
 159
 160                         if (_actions.Contains (name.Name))
 161                                 action = (AssemblyAction) _actions [name.Name];
 162                         else if (IsCore (name))
 163                                 action = _coreAction;
 164
 165                         Annotations.SetAction (assembly, action);
 166                 }
 167
 168                 static bool IsCore (AssemblyNameReference name)
 169                 {
 170                         return name.Name == "mscorlib"
 171                                 || name.Name == "Accessibility"
 172                                 || name.Name.StartsWith ("System")
 173                                 || name.Name.StartsWith ("Microsoft");
 174                 }
 175
 176                 public AssemblyDefinition [] GetAssemblies ()
 177                 {
 178                         IDictionary cache = _resolver.AssemblyCache;
 179                         AssemblyDefinition [] asms = new AssemblyDefinition [cache.Count];
 180                         cache.Values.CopyTo (asms, 0);
 181                         return asms;
 182                 }
 183
 184                 public void SetParameter (string key, string value)
 185                 {
 186                         _parameters [key] = value;
 187                 }
 188
 189                 public bool HasParameter (string key)
 190                 {
 191                         return _parameters.Contains (key);
 192                 }
 193
 194                 public string GetParameter (string key)
 195                 {
 196                         return (string) _parameters [key];
 197                 }
 198         }
 199 }