mcs/mcs/ikvm.cs

   1 //
   2 // ikvm.cs: IKVM.Reflection and IKVM.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 // Copyright 2011 Xamarin Inc
  10 //
  11 //
  12
  13 using System;
  14 using System.Collections.Generic;
  15 using MetaType = IKVM.Reflection.Type;
  16 using IKVM.Reflection;
  17 using IKVM.Reflection.Emit;
  18 using System.IO;
  19 using System.Configuration.Assemblies;
  20
  21 namespace Mono.CSharp
  22 {
  23 #if !STATIC
  24         public class StaticImporter
  25         {
  26                 public StaticImporter (BuiltinTypes builtin)
  27                 {
  28                         throw new NotSupportedException ();
  29                 }
  30
  31                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  32                 {
  33                         throw new NotSupportedException ();
  34                 }
  35
  36                 public void ImportModule (Module module, RootNamespace targetNamespace)
  37                 {
  38                         throw new NotSupportedException ();
  39                 }
  40
  41                 public TypeSpec ImportType (System.Type type)
  42                 {
  43                         throw new NotSupportedException ();
  44                 }
  45         }
  46
  47 #else
  48
  49         sealed class StaticImporter : MetadataImporter
  50         {
  51                 public StaticImporter (ModuleContainer module)
  52                         : base (module)
  53                 {
  54                 }
  55
  56                 public void AddCompiledAssembly (AssemblyDefinitionStatic assembly)
  57                 {
  58                         assembly_2_definition.Add (assembly.Builder, assembly);
  59                 }
  60
  61                 public override void AddCompiledType (TypeBuilder type, TypeSpec spec)
  62                 {
  63                         compiled_types.Add (type, spec);
  64                 }
  65
  66                 protected override MemberKind DetermineKindFromBaseType (MetaType baseType)
  67                 {
  68                         string name = baseType.Name;
  69
  70                         if (name == "ValueType" && baseType.Namespace == "System")
  71                                 return MemberKind.Struct;
  72
  73                         if (name == "Enum" && baseType.Namespace == "System")
  74                                 return MemberKind.Enum;
  75
  76                         if (name == "MulticastDelegate" && baseType.Namespace == "System")
  77                                 return MemberKind.Delegate;
  78
  79                         return MemberKind.Class;
  80                 }
  81
  82                 protected override bool HasVolatileModifier (MetaType[] modifiers)
  83                 {
  84                         foreach (var t in modifiers) {
  85                                 if (t.Name == "IsVolatile" && t.Namespace == CompilerServicesNamespace)
  86                                         return true;
  87                         }
  88
  89                         return false;
  90                 }
  91
  92                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  93                 {
  94                         try {
  95                                 // It can be used more than once when importing same assembly
  96                                 // into 2 or more global aliases
  97                                 // TODO: Should be just Add
  98                                 GetAssemblyDefinition (assembly);
  99
 100                                 var all_types = assembly.GetTypes ();
 101                                 ImportTypes (all_types, targetNamespace, true);
 102
 103                                 all_types = assembly.ManifestModule.__GetExportedTypes ();
 104                                 if (all_types.Length != 0)
 105                                         ImportForwardedTypes (all_types, targetNamespace);
 106                         } catch (Exception e) {
 107                                 throw new InternalErrorException (e, "Failed to import assembly `{0}'", assembly.FullName);
 108                         }
 109                 }
 110
 111                 public ImportedModuleDefinition ImportModule (Module module, RootNamespace targetNamespace)
 112                 {
 113                         var module_definition = new ImportedModuleDefinition (module);
 114                         module_definition.ReadAttributes ();
 115
 116                         var all_types = module.GetTypes ();
 117                         ImportTypes (all_types, targetNamespace, false);
 118
 119                         return module_definition;
 120                 }
 121
 122                 void ImportForwardedTypes (MetaType[] types, Namespace targetNamespace)
 123                 {
 124                         Namespace ns = targetNamespace;
 125                         string prev_namespace = null;
 126                         foreach (var t in types) {
 127                                 if (!t.__IsTypeForwarder)
 128                                         continue;
 129
 130                                 // IsMissing tells us the type has been forwarded and target assembly is missing
 131                                 if (!t.__IsMissing)
 132                                         continue;
 133
 134                                 if (t.Name[0] == '<')
 135                                         continue;
 136
 137                                 var it = CreateType (t, null, new DynamicTypeReader (t), true);
 138                                 if (it == null)
 139                                         continue;
 140
 141                                 if (prev_namespace != t.Namespace) {
 142                                         ns = t.Namespace == null ? targetNamespace : targetNamespace.GetNamespace (t.Namespace, true);
 143                                         prev_namespace = t.Namespace;
 144                                 }
 145
 146                                 ns.AddType (module, it);
 147                         }
 148                 }
 149
 150                 public void InitializeBuiltinTypes (BuiltinTypes builtin, Assembly corlib)
 151                 {
 152                         //
 153                         // Setup mapping for build-in types to avoid duplication of their definition
 154                         //
 155                         foreach (var type in builtin.AllTypes) {
 156                                 compiled_types.Add (corlib.GetType (type.FullName), type);
 157                         }
 158                 }
 159         }
 160 #endif
 161
 162         class AssemblyDefinitionStatic : AssemblyDefinition
 163         {
 164                 readonly StaticLoader loader;
 165
 166                 //
 167                 // Assembly container with file output
 168                 //
 169                 public AssemblyDefinitionStatic (ModuleContainer module, StaticLoader loader, string name, string fileName)
 170                         : base (module, name, fileName)
 171                 {
 172                         this.loader = loader;
 173                         Importer = loader.MetadataImporter;
 174                 }
 175
 176                 //
 177                 // Initializes the assembly SRE domain
 178                 //
 179                 public void Create (Universe domain)
 180                 {
 181                         ResolveAssemblySecurityAttributes ();
 182                         var an = CreateAssemblyName ();
 183
 184                         Builder = domain.DefineDynamicAssembly (an, AssemblyBuilderAccess.Save, Path.GetDirectoryName (file_name));
 185                         module.Create (this, CreateModuleBuilder ());
 186                 }
 187
 188                 public override void Emit ()
 189                 {
 190                         if (loader.Corlib != null && !(loader.Corlib is AssemblyBuilder)) {
 191                                 Builder.__SetImageRuntimeVersion (loader.Corlib.ImageRuntimeVersion, 0x20000);
 192                         } else if (module.Compiler.Settings.RuntimeMetadataVersion != null) {
 193                                 Builder.__SetImageRuntimeVersion (module.Compiler.Settings.RuntimeMetadataVersion, 0x20000);
 194                         } else {
 195                                 // Sets output file metadata version when there is no mscorlib
 196                                 switch (module.Compiler.Settings.StdLibRuntimeVersion) {
 197                                 case RuntimeVersion.v4:
 198                                         Builder.__SetImageRuntimeVersion ("v4.0.30319", 0x20000);
 199                                         break;
 200                                 case RuntimeVersion.v2:
 201                                         Builder.__SetImageRuntimeVersion ("v2.0.50727", 0x20000);
 202                                         break;
 203                                 case RuntimeVersion.v1:
 204                                         // Compiler does not do any checks whether the produced metadata
 205                                         // are valid in the context of 1.0 stream version
 206                                         Builder.__SetImageRuntimeVersion ("v1.1.4322", 0x10000);
 207                                         break;
 208                                 default:
 209                                         throw new NotImplementedException ();
 210                                 }
 211                         }
 212
 213                         builder_extra = new AssemblyBuilderIKVM (Builder, Compiler);
 214
 215                         base.Emit ();
 216                 }
 217
 218                 public Module IncludeModule (RawModule moduleFile)
 219                 {
 220                         return Builder.__AddModule (moduleFile);
 221                 }
 222
 223                 protected override List<string[]> GetNotUnifiedReferences (AssemblyName assemblyName)
 224                 {
 225                         return loader.GetNotUnifiedReferences (assemblyName);
 226                 }
 227
 228                 protected override void SaveModule (PortableExecutableKinds pekind, ImageFileMachine machine)
 229                 {
 230                         module.Builder.__Save (pekind, machine);
 231                 }
 232         }
 233
 234         class StaticLoader : AssemblyReferencesLoader<Assembly>, IDisposable
 235         {
 236                 readonly StaticImporter importer;
 237                 readonly Universe domain;
 238                 Assembly corlib;
 239                 readonly List<Tuple<AssemblyName, string, Assembly>> loaded_names;
 240                 static readonly Dictionary<string, string[]> sdk_directory;
 241                 Dictionary<AssemblyName, List<string[]>> resolved_version_mismatches;
 242
 243                 static StaticLoader ()
 244                 {
 245                         sdk_directory = new Dictionary<string, string[]> ();
 246                         sdk_directory.Add ("2", new string[] { "2.0-api", "v2.0.50727" });
 247                         sdk_directory.Add ("2.0", new string[] { "2.0-api", "v2.0.50727" });
 248                         sdk_directory.Add ("4", new string[] { "4.0-api", "v4.0.30319" });
 249                         sdk_directory.Add ("4.0", new string[] { "4.0-api", "v4.0.30319" });
 250                         sdk_directory.Add ("4.5", new string[] { "4.5-api", "v4.0.30319" });
 251                         sdk_directory.Add ("4.6", new string [] { "4.5", "net_4_x", "v4.0.30319" });
 252                 }
 253
 254                 public StaticLoader (StaticImporter importer, CompilerContext compiler)
 255                         : base (compiler)
 256                 {
 257                         this.importer = importer;
 258                         domain = new Universe (UniverseOptions.MetadataOnly | UniverseOptions.ResolveMissingMembers |
 259                                 UniverseOptions.DisableFusion | UniverseOptions.DecodeVersionInfoAttributeBlobs |
 260                                 UniverseOptions.DeterministicOutput);
 261
 262                         domain.AssemblyResolve += AssemblyReferenceResolver;
 263                         loaded_names = new List<Tuple<AssemblyName, string, Assembly>> ();
 264
 265                         if (compiler.Settings.StdLib) {
 266                                 var corlib_path = Path.GetDirectoryName (typeof (object).Assembly.Location);
 267                                 string fx_path = corlib_path.Substring (0, corlib_path.LastIndexOf (Path.DirectorySeparatorChar));
 268
 269                                 string sdk_path = null;
 270
 271                                 string sdk_version = compiler.Settings.SdkVersion ?? "4.6";
 272                                 string[] sdk_sub_dirs;
 273
 274                                 if (!sdk_directory.TryGetValue (sdk_version, out sdk_sub_dirs))
 275                                         sdk_sub_dirs = new string[] { sdk_version };
 276
 277                                 foreach (var dir in sdk_sub_dirs) {
 278                                         sdk_path = Path.Combine (fx_path, dir);
 279                                         if (File.Exists (Path.Combine (sdk_path, "mscorlib.dll")))
 280                                                 break;
 281
 282                                         sdk_path = null;
 283                                 }
 284
 285                                 if (sdk_path == null) {
 286                                         compiler.Report.Warning (-1, 1, "SDK path could not be resolved");
 287                                         sdk_path = corlib_path;
 288                                 }
 289
 290                                 paths.Add (sdk_path);
 291                         }
 292                 }
 293
 294                 #region Properties
 295
 296                 public Assembly Corlib {
 297                         get {
 298                                 return corlib;
 299                         }
 300                 }
 301
 302                 public AssemblyDefinitionStatic CompiledAssembly {  get; set; }
 303
 304                 public Universe Domain {
 305                         get {
 306                                 return domain;
 307                         }
 308                 }
 309
 310                 public StaticImporter MetadataImporter {
 311                         get {
 312                                 return importer;
 313                         }
 314                 }
 315
 316                 #endregion
 317
 318                 Assembly AssemblyReferenceResolver (object sender, IKVM.Reflection.ResolveEventArgs args)
 319                 {
 320                         var refname = args.Name;
 321                         if (refname == "mscorlib")
 322                                 return corlib;
 323
 324                         Assembly version_mismatch = null;
 325                         bool is_fx_assembly = false;
 326
 327                         foreach (var assembly in domain.GetAssemblies ()) {
 328                                 AssemblyComparisonResult result;
 329                                 if (!domain.CompareAssemblyIdentity (refname, false, assembly.FullName, false, out result)) {
 330                                         if ((result == AssemblyComparisonResult.NonEquivalentVersion || result == AssemblyComparisonResult.NonEquivalentPartialVersion) &&
 331                                                 (version_mismatch == null || version_mismatch.GetName ().Version < assembly.GetName ().Version) &&
 332                                                 !is_fx_assembly) {
 333                                                 version_mismatch = assembly;
 334                                         }
 335
 336                                         continue;
 337                                 }
 338
 339                                 if (result == AssemblyComparisonResult.EquivalentFullMatch ||
 340                                         result == AssemblyComparisonResult.EquivalentWeakNamed ||
 341                                         result == AssemblyComparisonResult.EquivalentPartialMatch) {
 342                                         return assembly;
 343                                 }
 344
 345                                 if (result == AssemblyComparisonResult.EquivalentFXUnified) {
 346                                         is_fx_assembly = true;
 347
 348                                         if (version_mismatch == null || version_mismatch.GetName ().Version < assembly.GetName ().Version)
 349                                                 version_mismatch = assembly;
 350
 351                                         continue;
 352                                 }
 353
 354                                 throw new NotImplementedException ("Assembly equality = " + result.ToString ());
 355                         }
 356
 357                         if (version_mismatch != null) {
 358                                 if (version_mismatch is AssemblyBuilder)
 359                                         return version_mismatch;
 360
 361                                 var v1 = new AssemblyName (refname).Version;
 362                                 var v2 = version_mismatch.GetName ().Version;
 363
 364                                 if (v1 > v2) {
 365                                         if (resolved_version_mismatches == null)
 366                                                 resolved_version_mismatches = new Dictionary<AssemblyName, List<string[]>> ();
 367
 368                                         var an = args.RequestingAssembly.GetName ();
 369                                         List<string[]> names;
 370                                         if (!resolved_version_mismatches.TryGetValue (an, out names)) {
 371                                                 names = new List<string[]> ();
 372                                                 resolved_version_mismatches.Add (an, names);
 373                                         }
 374
 375                                         names.Add (new[] {
 376                                                 args.RequestingAssembly.Location,
 377                                                 string.Format ("Assembly `{0}' depends on `{1}' which has a higher version number than referenced assembly `{2}'",
 378                                                         args.RequestingAssembly.FullName, refname, version_mismatch.GetName ().FullName)
 379                                         });
 380
 381                                         return version_mismatch;
 382                                 }
 383
 384                                 if (!is_fx_assembly) {
 385                                         if (v1.Major != v2.Major || v1.Minor != v2.Minor) {
 386                                                 compiler.Report.Warning (1701, 2,
 387                                                         "Assuming assembly reference `{0}' matches assembly `{1}'. You may need to supply runtime policy",
 388                                                         refname, version_mismatch.GetName ().FullName);
 389                                         } else {
 390                                                 compiler.Report.Warning (1702, 3,
 391                                                         "Assuming assembly reference `{0}' matches assembly `{1}'. You may need to supply runtime policy",
 392                                                         refname, version_mismatch.GetName ().FullName);
 393                                         }
 394                                 }
 395
 396                                 return version_mismatch;
 397                         }
 398
 399                         //
 400                         // Recursive reference to compiled assembly checks name only. Any other
 401                         // details (PublicKey, Version, etc) are not yet known hence cannot be checked
 402                         //
 403                         ParsedAssemblyName referenced_assembly;
 404                         if (Fusion.ParseAssemblyName (args.Name, out referenced_assembly) == ParseAssemblyResult.OK && CompiledAssembly.Name == referenced_assembly.Name)
 405                                 return CompiledAssembly.Builder;
 406
 407                         // AssemblyReference has not been found in the domain
 408                         // create missing reference and continue
 409                         return domain.CreateMissingAssembly (args.Name);
 410                 }
 411
 412                 public void Dispose ()
 413                 {
 414                         domain.Dispose ();
 415                 }
 416
 417                 protected override string[] GetDefaultReferences ()
 418                 {
 419                         //
 420                         // For now the "default config" is harcoded into the compiler
 421                         // we can move this outside later
 422                         //
 423                         var default_references = new List<string> (4);
 424
 425                         default_references.Add ("System.dll");
 426                         default_references.Add ("System.Xml.dll");
 427                         default_references.Add ("System.Core.dll");
 428
 429                         if (corlib != null && corlib.GetName ().Version.Major >= 4) {
 430                                 default_references.Add ("Microsoft.CSharp.dll");
 431                         }
 432
 433                         return default_references.ToArray ();
 434                 }
 435
 436                 public List<string[]> GetNotUnifiedReferences (AssemblyName assemblyName)
 437                 {
 438                         List<string[]> list = null;
 439                         if (resolved_version_mismatches != null)
 440                                 resolved_version_mismatches.TryGetValue (assemblyName, out list);
 441
 442                         return list;
 443                 }
 444
 445                 public override bool HasObjectType (Assembly assembly)
 446                 {
 447                         try {
 448                                 return assembly.GetType (compiler.BuiltinTypes.Object.FullName) != null;
 449                         } catch (Exception e) {
 450                                 throw new InternalErrorException (e, "Failed to load assembly `{0}'", assembly.FullName);
 451                         }
 452                 }
 453
 454                 public override Assembly LoadAssemblyFile (string fileName, bool isImplicitReference)
 455                 {
 456                         bool? has_extension = null;
 457                         foreach (var path in paths) {
 458                                 var file = Path.Combine (path, fileName);
 459                                 if (compiler.Settings.DebugFlags > 0)
 460                                         Console.WriteLine ("Probing assembly location `{0}'", file);
 461
 462                                 if (!File.Exists (file)) {
 463                                         if (!has_extension.HasValue)
 464                                                 has_extension = fileName.EndsWith (".dll", StringComparison.Ordinal) || fileName.EndsWith (".exe", StringComparison.Ordinal);
 465
 466                                         if (has_extension.Value)
 467                                                 continue;
 468
 469                                         file += ".dll";
 470                                         if (!File.Exists (file))
 471                                                 continue;
 472                                 }
 473
 474                                 try {
 475                                         using (var stream = new FileStream (file, FileMode.Open, FileAccess.Read, FileShare.Read)) {
 476                                                 using (RawModule module = domain.OpenRawModule (stream, file)) {
 477                                                         if (!module.IsManifestModule) {
 478                                                                 Error_AssemblyIsModule (fileName);
 479                                                                 return null;
 480                                                         }
 481
 482                                                         //
 483                                                         // check whether the assembly can be actually imported without
 484                                                         // collision
 485                                                         //
 486                                                         var an = module.GetAssemblyName ();
 487                                                         foreach (var entry in loaded_names) {
 488                                                                 var loaded_name = entry.Item1;
 489                                                                 if (an.Name != loaded_name.Name)
 490                                                                         continue;
 491
 492                                                                 if (module.ModuleVersionId == entry.Item3.ManifestModule.ModuleVersionId)
 493                                                                         return entry.Item3;
 494
 495                                                                 if (((an.Flags | loaded_name.Flags) & AssemblyNameFlags.PublicKey) == 0) {
 496                                                                         compiler.Report.SymbolRelatedToPreviousError (entry.Item2);
 497                                                                         compiler.Report.SymbolRelatedToPreviousError (fileName);
 498                                                                         compiler.Report.Error (1704,
 499                                                                                 "An assembly with the same name `{0}' has already been imported. Consider removing one of the references or sign the assembly",
 500                                                                                 an.Name);
 501                                                                         return null;
 502                                                                 }
 503
 504                                                                 if ((an.Flags & AssemblyNameFlags.PublicKey) == (loaded_name.Flags & AssemblyNameFlags.PublicKey)) {
 505                                                                         compiler.Report.SymbolRelatedToPreviousError (entry.Item2);
 506                                                                         compiler.Report.SymbolRelatedToPreviousError (fileName);
 507                                                                         compiler.Report.Error (1703,
 508                                                                                 "An assembly `{0}' with the same identity has already been imported. Consider removing one of the references",
 509                                                                                 an.Name);
 510                                                                         return null;
 511                                                                 }
 512                                                         }
 513
 514                                                         if (compiler.Settings.DebugFlags > 0)
 515                                                                 Console.WriteLine ("Loading assembly `{0}'", fileName);
 516
 517                                                         var assembly = domain.LoadAssembly (module);
 518                                                         if (assembly != null)
 519                                                                 loaded_names.Add (Tuple.Create (an, fileName, assembly));
 520
 521                                                         return assembly;
 522                                                 }
 523                                         }
 524                                 } catch (Exception e) {
 525                                         if (compiler.Settings.DebugFlags > 0)
 526                                                 Console.WriteLine ("Exception during loading: {0}'", e.ToString ());
 527
 528                                         if (!isImplicitReference)
 529                                                 Error_FileCorrupted (file);
 530
 531                                         return null;
 532                                 }
 533                         }
 534
 535                         if (!isImplicitReference)
 536                                 Error_FileNotFound (fileName);
 537
 538                         return null;
 539                 }
 540
 541                 public RawModule LoadModuleFile (string moduleName)
 542                 {
 543                         foreach (var path in paths) {
 544                                 var file = Path.Combine (path, moduleName);
 545                                 if (!File.Exists (file)) {
 546                                         if (moduleName.EndsWith (".netmodule", StringComparison.Ordinal))
 547                                                 continue;
 548
 549                                         file += ".netmodule";
 550                                         if (!File.Exists (file))
 551                                                 continue;
 552                                 }
 553
 554                                 try {
 555                                         return domain.OpenRawModule (file);
 556                                 } catch {
 557                                         Error_FileCorrupted (file);
 558                                         return null;
 559                                 }
 560                         }
 561
 562                         Error_FileNotFound (moduleName);
 563                         return null;
 564                 }
 565
 566                 public override void LoadReferences (ModuleContainer module)
 567                 {
 568                         List<Tuple<RootNamespace, Assembly>> loaded;
 569                         base.LoadReferencesCore (module, out corlib, out loaded);
 570
 571                         compiler.TimeReporter.Start (TimeReporter.TimerType.ReferencesImporting);
 572
 573                         if (corlib == null) {
 574                                 // System.Object was not found in any referenced assembly, use compiled assembly as corlib
 575                                 corlib = module.DeclaringAssembly.Builder;
 576                         } else {
 577                                 importer.InitializeBuiltinTypes (compiler.BuiltinTypes, corlib);
 578                                 importer.ImportAssembly (corlib, module.GlobalRootNamespace);
 579                         }
 580
 581                         foreach (var entry in loaded) {
 582                                 importer.ImportAssembly (entry.Item2, entry.Item1);
 583                         }
 584
 585                         compiler.TimeReporter.Stop (TimeReporter.TimerType.ReferencesImporting);
 586                 }
 587
 588                 public void LoadModules (AssemblyDefinitionStatic assembly, RootNamespace targetNamespace)
 589                 {
 590                         foreach (var moduleName in compiler.Settings.Modules) {
 591                                 var m = LoadModuleFile (moduleName);
 592                                 if (m == null)
 593                                         continue;
 594
 595                                 if (m.IsManifestModule) {
 596                                         Error_ModuleIsAssembly (moduleName);
 597                                         continue;
 598                                 }
 599
 600                                 var md = importer.ImportModule (assembly.IncludeModule (m), targetNamespace);
 601                                 assembly.AddModule (md);
 602                         }
 603                 }
 604         }
 605
 606         class AssemblyBuilderIKVM : AssemblyBuilderExtension
 607         {
 608                 readonly AssemblyBuilder builder;
 609
 610                 public AssemblyBuilderIKVM (AssemblyBuilder builder, CompilerContext ctx)
 611                         : base (ctx)
 612                 {
 613                         this.builder = builder;
 614                 }
 615
 616                 public override void AddTypeForwarder (TypeSpec type, Location loc)
 617                 {
 618                         builder.__AddTypeForwarder (type.GetMetaInfo (), false);
 619                 }
 620
 621                 public override void DefineWin32IconResource (string fileName)
 622                 {
 623                         byte[] bytes;
 624                         try {
 625                                 bytes = File.ReadAllBytes (fileName);
 626                         } catch (Exception e) {
 627                                 ctx.Report.Error (7064, Location.Null, "Error opening icon file `{0}'. {1}", fileName, e.Message);
 628                                 return;
 629                         }
 630
 631                         builder.__DefineIconResource (bytes);
 632                 }
 633
 634                 public override AssemblyName[] GetReferencedAssemblies ()
 635                 {
 636                         foreach (var m in builder.Modules) {
 637                                 if (m is ModuleBuilder)
 638                                         return m.__GetReferencedAssemblies ();
 639                         }
 640
 641                         return new AssemblyName [0];
 642                 }
 643
 644                 public override void SetAlgorithmId (uint value, Location loc)
 645                 {
 646                         builder.__SetAssemblyAlgorithmId ((AssemblyHashAlgorithm) value);
 647                 }
 648
 649                 public override void SetCulture (string culture, Location loc)
 650                 {
 651                         builder.__SetAssemblyCulture (culture);
 652                 }
 653
 654                 public override void SetFlags (uint flags, Location loc)
 655                 {
 656                         builder.__AssemblyFlags = (AssemblyNameFlags) flags;
 657                 }
 658
 659                 public override void SetVersion (Version version, Location loc)
 660                 {
 661                         builder.__SetAssemblyVersion (version);
 662                 }
 663         }
 664 }