mcs/tools/linker/Mono.Linker.Steps/BlacklistStep.cs

   1 //
   2 // Blacklist.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jb@nurv.fr)
   6 //
   7 // (C) 2007 Novell Inc.
   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.Linq;
  31 using System.IO;
  32 using System.Reflection;
  33 using System.Xml;
  34 using System.Xml.XPath;
  35
  36 using Mono.Cecil;
  37
  38 namespace Mono.Linker.Steps {
  39
  40         public class BlacklistStep : BaseStep {
  41
  42                 protected override bool ConditionToProcess()
  43                 {
  44                         return Context.CoreAction == AssemblyAction.Link;
  45                 }
  46
  47                 protected override void Process ()
  48                 {
  49                         foreach (string name in Assembly.GetExecutingAssembly ().GetManifestResourceNames ()) {
  50                                 if (Path.GetExtension (name) != ".xml" || !IsReferenced (GetAssemblyName (name)))
  51                                         continue;
  52
  53                                 try {
  54                                         if (Context.LogInternalExceptions)
  55                                                 Console.WriteLine ("Processing resource linker descriptor: {0}", name);
  56                                         Context.Pipeline.AddStepAfter (typeof (TypeMapStep), GetResolveStep (name));
  57                                 } catch (XmlException ex) {
  58                                         /* This could happen if some broken XML file is included. */
  59                                         if (Context.LogInternalExceptions)
  60                                                 Console.WriteLine ("Error processing {0}: {1}", name, ex);
  61                                 }
  62                         }
  63
  64                         foreach (var asm in Context.GetAssemblies ()) {
  65                                 foreach (var rsc in asm.Modules
  66                                                                         .SelectMany (mod => mod.Resources)
  67                                                                         .Where (res => res.ResourceType == ResourceType.Embedded)
  68                                                                         .Where (res => Path.GetExtension (res.Name) == ".xml")
  69                                                                         .Where (res => IsReferenced (GetAssemblyName (res.Name)))
  70                                                                         .Cast<EmbeddedResource> ()) {
  71                                         try {
  72                                                 if (Context.LogInternalExceptions)
  73                                                         Console.WriteLine ("Processing embedded resource linker descriptor: {0}", rsc.Name);
  74
  75                                                 Context.Pipeline.AddStepAfter (typeof (TypeMapStep), GetExternalResolveStep (rsc, asm));
  76                                         } catch (XmlException ex) {
  77                                                 /* This could happen if some broken XML file is embedded. */
  78                                                 if (Context.LogInternalExceptions)
  79                                                         Console.WriteLine ("Error processing {0}: {1}", rsc.Name, ex);
  80                                         }
  81                                 }
  82                         }
  83                 }
  84
  85                 static string GetAssemblyName (string descriptor)
  86                 {
  87                         int pos = descriptor.LastIndexOf ('.');
  88                         if (pos == -1)
  89                                 return descriptor;
  90
  91                         return descriptor.Substring (0, pos);
  92                 }
  93
  94                 bool IsReferenced (string name)
  95                 {
  96                         foreach (AssemblyDefinition assembly in Context.GetAssemblies ())
  97                                 if (assembly.Name.Name == name)
  98                                         return true;
  99
 100                         return false;
 101                 }
 102
 103                 static ResolveFromXmlStep GetExternalResolveStep (EmbeddedResource resource, AssemblyDefinition assembly)
 104                 {
 105                         return new ResolveFromXmlStep (GetExternalDescriptor (resource), "resource " + resource.Name + " in " + assembly.FullName);
 106                 }
 107
 108                 static ResolveFromXmlStep GetResolveStep (string descriptor)
 109                 {
 110                         return new ResolveFromXmlStep (GetDescriptor (descriptor), "descriptor " + descriptor + " from " + Assembly.GetExecutingAssembly ().FullName);
 111                 }
 112
 113                 static XPathDocument GetExternalDescriptor (EmbeddedResource resource)
 114                 {
 115                         using (var sr = new StreamReader (resource.GetResourceStream ())) {
 116                                 return new XPathDocument (new StringReader (sr.ReadToEnd ()));
 117                         }
 118                 }
 119
 120                 static XPathDocument GetDescriptor (string descriptor)
 121                 {
 122                         using (StreamReader sr = new StreamReader (GetResource (descriptor))) {
 123                                 return new XPathDocument (new StringReader (sr.ReadToEnd ()));
 124                         }
 125                 }
 126
 127                 static Stream GetResource (string descriptor)
 128                 {
 129                         return Assembly.GetExecutingAssembly ().GetManifestResourceStream (descriptor);
 130                 }
 131         }
 132 }