mcs/mcs/reflection.cs

   1 //
   2 // reflection.cs: System.Reflection and System.Reflection.Emit specific implementations
   3 //
   4 // Author: Marek Safar (marek.safar@gmail.com)
   5 //
   6 // Dual licensed under the terms of the MIT X11 or GNU GPL
   7 //
   8 // Copyright 2009-2010 Novell, Inc.
   9 //
  10 //
  11
  12 using System;
  13 using System.Collections.Generic;
  14 using System.Reflection;
  15 using System.IO;
  16 using System.Runtime.CompilerServices;
  17 using System.Reflection.Emit;
  18 using System.Security;
  19
  20 namespace Mono.CSharp
  21 {
  22 #if STATIC
  23         public class ReflectionImporter
  24         {
  25                 public ReflectionImporter (BuildinTypes buildin)
  26                 {
  27                         throw new NotSupportedException ();
  28                 }
  29
  30                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  31                 {
  32                         throw new NotSupportedException ();
  33                 }
  34
  35                 public ImportedModuleDefinition ImportModule (Module module, RootNamespace targetNamespace)
  36                 {
  37                         throw new NotSupportedException ();
  38                 }
  39
  40                 public TypeSpec ImportType (Type type)
  41                 {
  42                         throw new NotSupportedException ();
  43                 }
  44         }
  45 #else
  46         public sealed class ReflectionImporter : MetadataImporter
  47         {
  48                 public ReflectionImporter (BuildinTypes buildin)
  49                 {
  50                         Initialize (buildin);
  51                 }
  52
  53                 public override void AddCompiledType (TypeBuilder builder, TypeSpec spec)
  54                 {
  55                 }
  56
  57                 protected override MemberKind DetermineKindFromBaseType (Type baseType)
  58                 {
  59                         if (baseType == typeof (ValueType))
  60                                 return MemberKind.Struct;
  61
  62                         if (baseType == typeof (System.Enum))
  63                                 return MemberKind.Enum;
  64
  65                         if (baseType == typeof (MulticastDelegate))
  66                                 return MemberKind.Delegate;
  67
  68                         return MemberKind.Class;
  69                 }
  70
  71                 public override void GetCustomAttributeTypeName (CustomAttributeData cad, out string typeNamespace, out string typeName)
  72                 {
  73                         var dt = cad.Constructor.DeclaringType;
  74                         typeNamespace = dt.Namespace;
  75                         typeName = dt.Name;
  76                 }
  77
  78                 protected override bool HasVolatileModifier (Type[] modifiers)
  79                 {
  80                         foreach (var t in modifiers) {
  81                                 if (t == typeof (IsVolatile))
  82                                         return true;
  83                         }
  84
  85                         return false;
  86                 }
  87
  88                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  89                 {
  90                         // It can be used more than once when importing same assembly
  91                         // into 2 or more global aliases
  92                         var definition = GetAssemblyDefinition (assembly);
  93
  94                         //
  95                         // This part tries to simulate loading of top-level
  96                         // types only, any missing dependencies are ignores here.
  97                         // Full error report is reported later when the type is
  98                         // actually used
  99                         //
 100                         Type[] all_types;
 101                         try {
 102                                 all_types = assembly.GetTypes ();
 103                         } catch (ReflectionTypeLoadException e) {
 104                                 all_types = e.Types;
 105                         }
 106
 107                         ImportTypes (all_types, targetNamespace, definition.HasExtensionMethod);
 108                 }
 109
 110                 public ImportedModuleDefinition ImportModule (Module module, RootNamespace targetNamespace)
 111                 {
 112                         var module_definition = new ImportedModuleDefinition (module, this);
 113                         module_definition.ReadAttributes ();
 114
 115                         Type[] all_types;
 116                         try {
 117                                 all_types = module.GetTypes ();
 118                         } catch (ReflectionTypeLoadException e) {
 119                                 all_types = e.Types;
 120                         }
 121
 122                         ImportTypes (all_types, targetNamespace, false);
 123
 124                         return module_definition;
 125                 }
 126
 127                 void Initialize (BuildinTypes buildin)
 128                 {
 129                         //
 130                         // Setup mapping for build-in types to avoid duplication of their definition
 131                         //
 132                         compiled_types.Add (typeof (object), buildin.Object);
 133                         compiled_types.Add (typeof (System.ValueType), buildin.ValueType);
 134                         compiled_types.Add (typeof (System.Attribute), buildin.Attribute);
 135
 136                         compiled_types.Add (typeof (int), buildin.Int);
 137                         compiled_types.Add (typeof (long), buildin.Long);
 138                         compiled_types.Add (typeof (uint), buildin.UInt);
 139                         compiled_types.Add (typeof (ulong), buildin.ULong);
 140                         compiled_types.Add (typeof (byte), buildin.Byte);
 141                         compiled_types.Add (typeof (sbyte), buildin.SByte);
 142                         compiled_types.Add (typeof (short), buildin.Short);
 143                         compiled_types.Add (typeof (ushort), buildin.UShort);
 144
 145                         compiled_types.Add (typeof (System.Collections.IEnumerator), buildin.IEnumerator);
 146                         compiled_types.Add (typeof (System.Collections.IEnumerable), buildin.IEnumerable);
 147                         compiled_types.Add (typeof (System.IDisposable), buildin.IDisposable);
 148
 149                         compiled_types.Add (typeof (char), buildin.Char);
 150                         compiled_types.Add (typeof (string), buildin.String);
 151                         compiled_types.Add (typeof (float), buildin.Float);
 152                         compiled_types.Add (typeof (double), buildin.Double);
 153                         compiled_types.Add (typeof (decimal), buildin.Decimal);
 154                         compiled_types.Add (typeof (bool), buildin.Bool);
 155                         compiled_types.Add (typeof (System.IntPtr), buildin.IntPtr);
 156                         compiled_types.Add (typeof (System.UIntPtr), buildin.UIntPtr);
 157
 158                         compiled_types.Add (typeof (System.MulticastDelegate), buildin.MulticastDelegate);
 159                         compiled_types.Add (typeof (System.Delegate), buildin.Delegate);
 160                         compiled_types.Add (typeof (System.Enum), buildin.Enum);
 161                         compiled_types.Add (typeof (System.Array), buildin.Array);
 162                         compiled_types.Add (typeof (void), buildin.Void);
 163                         compiled_types.Add (typeof (System.Type), buildin.Type);
 164                         compiled_types.Add (typeof (System.Exception), buildin.Exception);
 165                         compiled_types.Add (typeof (System.RuntimeFieldHandle), buildin.RuntimeFieldHandle);
 166                         compiled_types.Add (typeof (System.RuntimeTypeHandle), buildin.RuntimeTypeHandle);
 167                 }
 168         }
 169
 170 #endif
 171
 172         public class AssemblyDefinitionDynamic : AssemblyDefinition
 173         {
 174                 //
 175                 // In-memory only assembly container
 176                 //
 177                 public AssemblyDefinitionDynamic (ModuleContainer module, string name)
 178                         : base (module, name)
 179                 {
 180                 }
 181
 182                 //
 183                 // Assembly container with file output
 184                 //
 185                 public AssemblyDefinitionDynamic (ModuleContainer module, string name, string fileName)
 186                         : base (module, name, fileName)
 187                 {
 188                 }
 189
 190                 public Module IncludeModule (string moduleFile)
 191                 {
 192                         return builder_extra.AddModule (moduleFile);
 193                 }
 194
 195 #if !STATIC
 196                 public override ModuleBuilder CreateModuleBuilder ()
 197                 {
 198                         if (file_name == null)
 199                                 return Builder.DefineDynamicModule (Name, false);
 200
 201                         return base.CreateModuleBuilder ();
 202                 }
 203 #endif
 204                 //
 205                 // Initializes the code generator
 206                 //
 207                 public bool Create (AppDomain domain, AssemblyBuilderAccess access)
 208                 {
 209 #if STATIC
 210                         throw new NotSupportedException ();
 211 #else
 212                         ResolveAssemblySecurityAttributes ();
 213                         var an = CreateAssemblyName ();
 214
 215                         try {
 216                                 Builder = file_name == null ?
 217                                         domain.DefineDynamicAssembly (an, access) :
 218                                         domain.DefineDynamicAssembly (an, access, Dirname (file_name));
 219                         } catch (ArgumentException) {
 220                                 // specified key may not be exportable outside it's container
 221                                 if (RootContext.StrongNameKeyContainer != null) {
 222                                         Report.Error (1548, "Could not access the key inside the container `" +
 223                                                 RootContext.StrongNameKeyContainer + "'.");
 224                                 }
 225                                 throw;
 226                         }
 227
 228                         module.Create (this, CreateModuleBuilder ());
 229                         builder_extra = new AssemblyBuilderMonoSpecific (Builder, Compiler);
 230                         return true;
 231 #endif
 232                 }
 233
 234                 static string Dirname (string name)
 235                 {
 236                         int pos = name.LastIndexOf ('/');
 237
 238                         if (pos != -1)
 239                                 return name.Substring (0, pos);
 240
 241                         pos = name.LastIndexOf ('\\');
 242                         if (pos != -1)
 243                                 return name.Substring (0, pos);
 244
 245                         return ".";
 246                 }
 247
 248 #if !STATIC
 249                 protected override void SaveModule (PortableExecutableKinds pekind, ImageFileMachine machine)
 250                 {
 251                         try {
 252                                 var module_only = typeof (AssemblyBuilder).GetProperty ("IsModuleOnly", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
 253                                 var set_module_only = module_only.GetSetMethod (true);
 254
 255                                 set_module_only.Invoke (Builder, new object[] { true });
 256                         } catch {
 257                                 base.SaveModule (pekind, machine);
 258                         }
 259
 260                         Builder.Save (file_name, pekind, machine);
 261                 }
 262 #endif
 263         }
 264
 265         //
 266         // Extension to System.Reflection.Emit.AssemblyBuilder to have fully compatible
 267         // compiler
 268         //
 269         class AssemblyBuilderMonoSpecific : AssemblyBuilderExtension
 270         {
 271                 static MethodInfo adder_method;
 272                 static MethodInfo add_permission;
 273                 static MethodInfo add_type_forwarder;
 274                 static MethodInfo win32_icon_define;
 275                 static FieldInfo assembly_version;
 276                 static FieldInfo assembly_algorithm;
 277                 static FieldInfo assembly_culture;
 278                 static FieldInfo assembly_flags;
 279
 280                 AssemblyBuilder builder;
 281
 282                 public AssemblyBuilderMonoSpecific (AssemblyBuilder ab, CompilerContext ctx)
 283                         : base (ctx)
 284                 {
 285                         this.builder = ab;
 286                 }
 287
 288                 public override Module AddModule (string module)
 289                 {
 290                         try {
 291                                 if (adder_method == null)
 292                                         adder_method = typeof (AssemblyBuilder).GetMethod ("AddModule", BindingFlags.Instance | BindingFlags.NonPublic);
 293
 294                                 return (Module) adder_method.Invoke (builder, new object[] { module });
 295                         } catch {
 296                                 return base.AddModule (module);
 297                         }
 298                 }
 299
 300                 public override void AddPermissionRequests (PermissionSet[] permissions)
 301                 {
 302                         try {
 303                                 if (add_permission == null)
 304                                         add_permission = typeof (AssemblyBuilder).GetMethod ("AddPermissionRequests", BindingFlags.Instance | BindingFlags.NonPublic);
 305
 306                                 add_permission.Invoke (builder, permissions);
 307                         } catch {
 308                                 base.AddPermissionRequests (permissions);
 309                         }
 310                 }
 311
 312                 public override void AddTypeForwarder (TypeSpec type, Location loc)
 313                 {
 314                         try {
 315                                 if (add_type_forwarder == null) {
 316                                         add_type_forwarder = typeof (AssemblyBuilder).GetMethod ("AddTypeForwarder", BindingFlags.NonPublic | BindingFlags.Instance);
 317                                 }
 318
 319                                 add_type_forwarder.Invoke (builder, new object[] { type.GetMetaInfo () });
 320                         } catch {
 321                                 base.AddTypeForwarder (type, loc);
 322                         }
 323                 }
 324
 325                 public override void DefineWin32IconResource (string fileName)
 326                 {
 327                         try {
 328                                 if (win32_icon_define == null)
 329                                         win32_icon_define = typeof (AssemblyBuilder).GetMethod ("DefineIconResource", BindingFlags.Instance | BindingFlags.NonPublic);
 330
 331                                 win32_icon_define.Invoke (builder, new object[] { fileName });
 332                         } catch {
 333                                 base.DefineWin32IconResource (fileName);
 334                         }
 335                 }
 336
 337                 public override void SetAlgorithmId (uint value, Location loc)
 338                 {
 339                         try {
 340                                 if (assembly_algorithm == null)
 341                                         assembly_algorithm = typeof (AssemblyBuilder).GetField ("algid", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 342
 343                                 assembly_algorithm.SetValue (builder, value);
 344                         } catch {
 345                                 base.SetAlgorithmId (value, loc);
 346                         }
 347                 }
 348
 349                 public override void SetCulture (string culture, Location loc)
 350                 {
 351                         try {
 352                                 if (assembly_culture == null)
 353                                         assembly_culture = typeof (AssemblyBuilder).GetField ("culture", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 354
 355                                 assembly_culture.SetValue (builder, culture);
 356                         } catch {
 357                                 base.SetCulture (culture, loc);
 358                         }
 359                 }
 360
 361                 public override void SetFlags (uint flags, Location loc)
 362                 {
 363                         try {
 364                                 if (assembly_flags == null)
 365                                         assembly_flags = typeof (AssemblyBuilder).GetField ("flags", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 366
 367                                 assembly_flags.SetValue (builder, flags);
 368                         } catch {
 369                                 base.SetFlags (flags, loc);
 370                         }
 371                 }
 372
 373                 public override void SetVersion (Version version, Location loc)
 374                 {
 375                         try {
 376                                 if (assembly_version == null)
 377                                         assembly_version = typeof (AssemblyBuilder).GetField ("version", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 378
 379                                 assembly_version.SetValue (builder, version.ToString (4));
 380                         } catch {
 381                                 base.SetVersion (version, loc);
 382                         }
 383                 }
 384         }
 385
 386         //
 387         // Reflection based references loader
 388         //
 389         class DynamicLoader : AssemblyReferencesLoader<Assembly>
 390         {
 391                 readonly ReflectionImporter importer;
 392
 393                 public DynamicLoader (ReflectionImporter importer, CompilerContext compiler)
 394                         : base (compiler)
 395                 {
 396                         paths.Add (GetSystemDir ());
 397
 398                         this.importer = importer;
 399                 }
 400
 401                 public ReflectionImporter Importer {
 402                         get {
 403                                 return importer;
 404                         }
 405                 }
 406
 407                 protected override string[] GetDefaultReferences ()
 408                 {
 409                         //
 410                         // For now the "default config" is harcoded into the compiler
 411                         // we can move this outside later
 412                         //
 413                         var default_references = new List<string> (8);
 414
 415                         default_references.Add ("System");
 416                         default_references.Add ("System.Xml");
 417 #if NET_2_1
 418                         default_references.Add ("System.Net");
 419                         default_references.Add ("System.Windows");
 420                         default_references.Add ("System.Windows.Browser");
 421 #endif
 422
 423                         if (RootContext.Version > LanguageVersion.ISO_2)
 424                                 default_references.Add ("System.Core");
 425                         if (RootContext.Version > LanguageVersion.V_3)
 426                                 default_references.Add ("Microsoft.CSharp");
 427
 428                         return default_references.ToArray ();
 429                 }
 430
 431                 //
 432                 // Returns the directory where the system assemblies are installed
 433                 //
 434                 static string GetSystemDir ()
 435                 {
 436                         return Path.GetDirectoryName (typeof (object).Assembly.Location);
 437                 }
 438
 439                 public override bool HasObjectType (Assembly assembly)
 440                 {
 441                         return assembly.GetType (compiler.BuildinTypes.Object.FullName) != null;
 442                 }
 443
 444                 public override Assembly LoadAssemblyFile (string fileName)
 445                 {
 446                         return LoadAssemblyFile (fileName, false);
 447                 }
 448
 449                 Assembly LoadAssemblyFile (string assembly, bool soft)
 450                 {
 451                         Assembly a = null;
 452
 453                         try {
 454                                 try {
 455                                         char[] path_chars = { '/', '\\' };
 456
 457                                         if (assembly.IndexOfAny (path_chars) != -1) {
 458                                                 a = Assembly.LoadFrom (assembly);
 459                                         } else {
 460                                                 string ass = assembly;
 461                                                 if (ass.EndsWith (".dll") || ass.EndsWith (".exe"))
 462                                                         ass = assembly.Substring (0, assembly.Length - 4);
 463                                                 a = Assembly.Load (ass);
 464                                         }
 465                                 } catch (FileNotFoundException) {
 466                                         bool err = !soft;
 467                                         foreach (string dir in paths) {
 468                                                 string full_path = Path.Combine (dir, assembly);
 469                                                 if (!assembly.EndsWith (".dll") && !assembly.EndsWith (".exe"))
 470                                                         full_path += ".dll";
 471
 472                                                 try {
 473                                                         a = Assembly.LoadFrom (full_path);
 474                                                         err = false;
 475                                                         break;
 476                                                 } catch (FileNotFoundException) {
 477                                                 }
 478                                         }
 479
 480                                         if (err) {
 481                                                 Error_FileNotFound (assembly);
 482                                                 return a;
 483                                         }
 484                                 }
 485                         } catch (BadImageFormatException) {
 486                                 Error_FileCorrupted (assembly);
 487                         }
 488
 489                         return a;
 490                 }
 491
 492                 public override Assembly LoadAssemblyDefault (string fileName)
 493                 {
 494                         return LoadAssemblyFile (fileName, true);
 495                 }
 496
 497                 Module LoadModuleFile (AssemblyDefinitionDynamic assembly, string module)
 498                 {
 499                         string total_log = "";
 500
 501                         try {
 502                                 try {
 503                                         return assembly.IncludeModule (module);
 504                                 } catch (FileNotFoundException) {
 505                                         bool err = true;
 506                                         foreach (string dir in paths) {
 507                                                 string full_path = Path.Combine (dir, module);
 508                                                 if (!module.EndsWith (".netmodule"))
 509                                                         full_path += ".netmodule";
 510
 511                                                 try {
 512                                                         return assembly.IncludeModule (full_path);
 513                                                 } catch (FileNotFoundException ff) {
 514                                                         total_log += ff.FusionLog;
 515                                                 }
 516                                         }
 517                                         if (err) {
 518                                                 Error_FileNotFound (module);
 519                                                 return null;
 520                                         }
 521                                 }
 522                         } catch (BadImageFormatException) {
 523                                 Error_FileCorrupted (module);
 524                         }
 525
 526                         return null;
 527                 }
 528
 529                 public void LoadModules (AssemblyDefinitionDynamic assembly, RootNamespace targetNamespace)
 530                 {
 531                         if (RootContext.Modules.Count == 0)
 532                                 return;
 533
 534                         foreach (var moduleName in RootContext.Modules) {
 535                                 var m = LoadModuleFile (assembly, moduleName);
 536                                 if (m == null)
 537                                         continue;
 538
 539                                 var md = importer.ImportModule (m, targetNamespace);
 540                                 assembly.AddModule (md);
 541                         }
 542                 }
 543
 544                 public override void LoadReferences (ModuleContainer module)
 545                 {
 546                         Assembly corlib;
 547                         List<Tuple<RootNamespace, Assembly>> loaded;
 548                         base.LoadReferencesCore (module, out corlib, out loaded);
 549
 550                         if (corlib == null)
 551                                 return;
 552
 553                         importer.ImportAssembly (corlib, module.GlobalRootNamespace);
 554                         foreach (var entry in loaded) {
 555                                 importer.ImportAssembly (entry.Item2, entry.Item1);
 556                         }
 557                 }
 558         }
 559 }