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 (ModuleContainer module, BuiltinTypes builtin)
  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 (ModuleContainer module, BuiltinTypes builtin)
  49                         : base (module)
  50                 {
  51                         Initialize (builtin);
  52                 }
  53
  54                 public override void AddCompiledType (TypeBuilder builder, TypeSpec spec)
  55                 {
  56                 }
  57
  58                 protected override MemberKind DetermineKindFromBaseType (Type baseType)
  59                 {
  60                         if (baseType == typeof (ValueType))
  61                                 return MemberKind.Struct;
  62
  63                         if (baseType == typeof (System.Enum))
  64                                 return MemberKind.Enum;
  65
  66                         if (baseType == typeof (MulticastDelegate))
  67                                 return MemberKind.Delegate;
  68
  69                         return MemberKind.Class;
  70                 }
  71
  72                 protected override bool HasVolatileModifier (Type[] modifiers)
  73                 {
  74                         foreach (var t in modifiers) {
  75                                 if (t == typeof (IsVolatile))
  76                                         return true;
  77                         }
  78
  79                         return false;
  80                 }
  81
  82                 public void ImportAssembly (Assembly assembly, RootNamespace targetNamespace)
  83                 {
  84                         // It can be used more than once when importing same assembly
  85                         // into 2 or more global aliases
  86                         var definition = GetAssemblyDefinition (assembly);
  87
  88                         //
  89                         // This part tries to simulate loading of top-level
  90                         // types only, any missing dependencies are ignores here.
  91                         // Full error report is reported later when the type is
  92                         // actually used
  93                         //
  94                         Type[] all_types;
  95                         try {
  96                                 all_types = assembly.GetTypes ();
  97                         } catch (ReflectionTypeLoadException e) {
  98                                 all_types = e.Types;
  99                         }
 100
 101                         ImportTypes (all_types, targetNamespace, definition.HasExtensionMethod);
 102                 }
 103
 104                 public ImportedModuleDefinition ImportModule (Module module, RootNamespace targetNamespace)
 105                 {
 106                         var module_definition = new ImportedModuleDefinition (module);
 107                         module_definition.ReadAttributes ();
 108
 109                         Type[] all_types;
 110                         try {
 111                                 all_types = module.GetTypes ();
 112                         } catch (ReflectionTypeLoadException e) {
 113                                 all_types = e.Types;
 114                         }
 115
 116                         ImportTypes (all_types, targetNamespace, false);
 117
 118                         return module_definition;
 119                 }
 120
 121                 void Initialize (BuiltinTypes builtin)
 122                 {
 123                         //
 124                         // Setup mapping for build-in types to avoid duplication of their definition
 125                         //
 126                         compiled_types.Add (typeof (object), builtin.Object);
 127                         compiled_types.Add (typeof (System.ValueType), builtin.ValueType);
 128                         compiled_types.Add (typeof (System.Attribute), builtin.Attribute);
 129
 130                         compiled_types.Add (typeof (int), builtin.Int);
 131                         compiled_types.Add (typeof (long), builtin.Long);
 132                         compiled_types.Add (typeof (uint), builtin.UInt);
 133                         compiled_types.Add (typeof (ulong), builtin.ULong);
 134                         compiled_types.Add (typeof (byte), builtin.Byte);
 135                         compiled_types.Add (typeof (sbyte), builtin.SByte);
 136                         compiled_types.Add (typeof (short), builtin.Short);
 137                         compiled_types.Add (typeof (ushort), builtin.UShort);
 138
 139                         compiled_types.Add (typeof (System.Collections.IEnumerator), builtin.IEnumerator);
 140                         compiled_types.Add (typeof (System.Collections.IEnumerable), builtin.IEnumerable);
 141                         compiled_types.Add (typeof (System.IDisposable), builtin.IDisposable);
 142
 143                         compiled_types.Add (typeof (char), builtin.Char);
 144                         compiled_types.Add (typeof (string), builtin.String);
 145                         compiled_types.Add (typeof (float), builtin.Float);
 146                         compiled_types.Add (typeof (double), builtin.Double);
 147                         compiled_types.Add (typeof (decimal), builtin.Decimal);
 148                         compiled_types.Add (typeof (bool), builtin.Bool);
 149                         compiled_types.Add (typeof (System.IntPtr), builtin.IntPtr);
 150                         compiled_types.Add (typeof (System.UIntPtr), builtin.UIntPtr);
 151
 152                         compiled_types.Add (typeof (System.MulticastDelegate), builtin.MulticastDelegate);
 153                         compiled_types.Add (typeof (System.Delegate), builtin.Delegate);
 154                         compiled_types.Add (typeof (System.Enum), builtin.Enum);
 155                         compiled_types.Add (typeof (System.Array), builtin.Array);
 156                         compiled_types.Add (typeof (void), builtin.Void);
 157                         compiled_types.Add (typeof (System.Type), builtin.Type);
 158                         compiled_types.Add (typeof (System.Exception), builtin.Exception);
 159                         compiled_types.Add (typeof (System.RuntimeFieldHandle), builtin.RuntimeFieldHandle);
 160                         compiled_types.Add (typeof (System.RuntimeTypeHandle), builtin.RuntimeTypeHandle);
 161                 }
 162         }
 163
 164         [System.Runtime.InteropServices.StructLayout (System.Runtime.InteropServices.LayoutKind.Explicit)]
 165         struct SingleConverter
 166         {
 167                 [System.Runtime.InteropServices.FieldOffset (0)]
 168                 int i;
 169                 [System.Runtime.InteropServices.FieldOffset (0)]
 170                 float f;
 171
 172                 public static int SingleToInt32Bits (float v)
 173                 {
 174                         SingleConverter c = new SingleConverter ();
 175                         c.f = v;
 176                         return c.i;
 177                 }
 178         }
 179
 180 #endif
 181
 182         public class AssemblyDefinitionDynamic : AssemblyDefinition
 183         {
 184                 //
 185                 // In-memory only assembly container
 186                 //
 187                 public AssemblyDefinitionDynamic (ModuleContainer module, string name)
 188                         : base (module, name)
 189                 {
 190                 }
 191
 192                 //
 193                 // Assembly container with file output
 194                 //
 195                 public AssemblyDefinitionDynamic (ModuleContainer module, string name, string fileName)
 196                         : base (module, name, fileName)
 197                 {
 198                 }
 199
 200                 public Module IncludeModule (string moduleFile)
 201                 {
 202                         return builder_extra.AddModule (moduleFile);
 203                 }
 204
 205 #if !STATIC
 206                 public override ModuleBuilder CreateModuleBuilder ()
 207                 {
 208                         if (file_name == null)
 209                                 return Builder.DefineDynamicModule (Name, false);
 210
 211                         return base.CreateModuleBuilder ();
 212                 }
 213 #endif
 214                 //
 215                 // Initializes the code generator
 216                 //
 217                 public bool Create (AppDomain domain, AssemblyBuilderAccess access)
 218                 {
 219 #if STATIC
 220                         throw new NotSupportedException ();
 221 #else
 222                         ResolveAssemblySecurityAttributes ();
 223                         var an = CreateAssemblyName ();
 224
 225                         Builder = file_name == null ?
 226                                 domain.DefineDynamicAssembly (an, access) :
 227                                 domain.DefineDynamicAssembly (an, access, Dirname (file_name));
 228
 229                         module.Create (this, CreateModuleBuilder ());
 230                         builder_extra = new AssemblyBuilderMonoSpecific (Builder, Compiler);
 231                         return true;
 232 #endif
 233                 }
 234
 235                 static string Dirname (string name)
 236                 {
 237                         int pos = name.LastIndexOf ('/');
 238
 239                         if (pos != -1)
 240                                 return name.Substring (0, pos);
 241
 242                         pos = name.LastIndexOf ('\\');
 243                         if (pos != -1)
 244                                 return name.Substring (0, pos);
 245
 246                         return ".";
 247                 }
 248
 249 #if !STATIC
 250                 protected override void SaveModule (PortableExecutableKinds pekind, ImageFileMachine machine)
 251                 {
 252                         try {
 253                                 var module_only = typeof (AssemblyBuilder).GetProperty ("IsModuleOnly", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
 254                                 var set_module_only = module_only.GetSetMethod (true);
 255
 256                                 set_module_only.Invoke (Builder, new object[] { true });
 257                         } catch {
 258                                 base.SaveModule (pekind, machine);
 259                         }
 260
 261                         Builder.Save (file_name, pekind, machine);
 262                 }
 263 #endif
 264         }
 265
 266         //
 267         // Extension to System.Reflection.Emit.AssemblyBuilder to have fully compatible
 268         // compiler
 269         //
 270         class AssemblyBuilderMonoSpecific : AssemblyBuilderExtension
 271         {
 272                 static MethodInfo adder_method;
 273                 static MethodInfo add_permission;
 274                 static MethodInfo add_type_forwarder;
 275                 static MethodInfo win32_icon_define;
 276                 static FieldInfo assembly_version;
 277                 static FieldInfo assembly_algorithm;
 278                 static FieldInfo assembly_culture;
 279                 static FieldInfo assembly_flags;
 280
 281                 AssemblyBuilder builder;
 282
 283                 public AssemblyBuilderMonoSpecific (AssemblyBuilder ab, CompilerContext ctx)
 284                         : base (ctx)
 285                 {
 286                         this.builder = ab;
 287                 }
 288
 289                 public override Module AddModule (string module)
 290                 {
 291                         try {
 292                                 if (adder_method == null)
 293                                         adder_method = typeof (AssemblyBuilder).GetMethod ("AddModule", BindingFlags.Instance | BindingFlags.NonPublic);
 294
 295                                 return (Module) adder_method.Invoke (builder, new object[] { module });
 296                         } catch {
 297                                 return base.AddModule (module);
 298                         }
 299                 }
 300
 301                 public override void AddPermissionRequests (PermissionSet[] permissions)
 302                 {
 303                         try {
 304                                 if (add_permission == null)
 305                                         add_permission = typeof (AssemblyBuilder).GetMethod ("AddPermissionRequests", BindingFlags.Instance | BindingFlags.NonPublic);
 306
 307                                 add_permission.Invoke (builder, permissions);
 308                         } catch {
 309                                 base.AddPermissionRequests (permissions);
 310                         }
 311                 }
 312
 313                 public override void AddTypeForwarder (TypeSpec type, Location loc)
 314                 {
 315                         try {
 316                                 if (add_type_forwarder == null) {
 317                                         add_type_forwarder = typeof (AssemblyBuilder).GetMethod ("AddTypeForwarder", BindingFlags.NonPublic | BindingFlags.Instance);
 318                                 }
 319
 320                                 add_type_forwarder.Invoke (builder, new object[] { type.GetMetaInfo () });
 321                         } catch {
 322                                 base.AddTypeForwarder (type, loc);
 323                         }
 324                 }
 325
 326                 public override void DefineWin32IconResource (string fileName)
 327                 {
 328                         try {
 329                                 if (win32_icon_define == null)
 330                                         win32_icon_define = typeof (AssemblyBuilder).GetMethod ("DefineIconResource", BindingFlags.Instance | BindingFlags.NonPublic);
 331
 332                                 win32_icon_define.Invoke (builder, new object[] { fileName });
 333                         } catch {
 334                                 base.DefineWin32IconResource (fileName);
 335                         }
 336                 }
 337
 338                 public override void SetAlgorithmId (uint value, Location loc)
 339                 {
 340                         try {
 341                                 if (assembly_algorithm == null)
 342                                         assembly_algorithm = typeof (AssemblyBuilder).GetField ("algid", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 343
 344                                 assembly_algorithm.SetValue (builder, value);
 345                         } catch {
 346                                 base.SetAlgorithmId (value, loc);
 347                         }
 348                 }
 349
 350                 public override void SetCulture (string culture, Location loc)
 351                 {
 352                         try {
 353                                 if (assembly_culture == null)
 354                                         assembly_culture = typeof (AssemblyBuilder).GetField ("culture", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 355
 356                                 assembly_culture.SetValue (builder, culture);
 357                         } catch {
 358                                 base.SetCulture (culture, loc);
 359                         }
 360                 }
 361
 362                 public override void SetFlags (uint flags, Location loc)
 363                 {
 364                         try {
 365                                 if (assembly_flags == null)
 366                                         assembly_flags = typeof (AssemblyBuilder).GetField ("flags", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 367
 368                                 assembly_flags.SetValue (builder, flags);
 369                         } catch {
 370                                 base.SetFlags (flags, loc);
 371                         }
 372                 }
 373
 374                 public override void SetVersion (Version version, Location loc)
 375                 {
 376                         try {
 377                                 if (assembly_version == null)
 378                                         assembly_version = typeof (AssemblyBuilder).GetField ("version", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.SetField);
 379
 380                                 assembly_version.SetValue (builder, version.ToString (4));
 381                         } catch {
 382                                 base.SetVersion (version, loc);
 383                         }
 384                 }
 385         }
 386
 387         //
 388         // Reflection based references loader
 389         //
 390         class DynamicLoader : AssemblyReferencesLoader<Assembly>
 391         {
 392                 readonly ReflectionImporter importer;
 393
 394                 public DynamicLoader (ReflectionImporter importer, CompilerContext compiler)
 395                         : base (compiler)
 396                 {
 397                         paths.Add (GetSystemDir ());
 398
 399                         this.importer = importer;
 400                 }
 401
 402                 public ReflectionImporter Importer {
 403                         get {
 404                                 return importer;
 405                         }
 406                 }
 407
 408                 protected override string[] GetDefaultReferences ()
 409                 {
 410                         //
 411                         // For now the "default config" is harcoded into the compiler
 412                         // we can move this outside later
 413                         //
 414                         var default_references = new List<string> (8);
 415
 416                         default_references.Add ("System");
 417                         default_references.Add ("System.Xml");
 418 #if NET_2_1
 419                         default_references.Add ("System.Net");
 420                         default_references.Add ("System.Windows");
 421                         default_references.Add ("System.Windows.Browser");
 422 #endif
 423
 424                         if (compiler.Settings.Version > LanguageVersion.ISO_2)
 425                                 default_references.Add ("System.Core");
 426                         if (compiler.Settings.Version > LanguageVersion.V_3)
 427                                 default_references.Add ("Microsoft.CSharp");
 428
 429                         return default_references.ToArray ();
 430                 }
 431
 432                 //
 433                 // Returns the directory where the system assemblies are installed
 434                 //
 435                 static string GetSystemDir ()
 436                 {
 437                         return Path.GetDirectoryName (typeof (object).Assembly.Location);
 438                 }
 439
 440                 public override bool HasObjectType (Assembly assembly)
 441                 {
 442                         return assembly.GetType (compiler.BuiltinTypes.Object.FullName) != null;
 443                 }
 444
 445                 public override Assembly LoadAssemblyFile (string assembly, bool isImplicitReference)
 446                 {
 447                         Assembly a = null;
 448
 449                         try {
 450                                 try {
 451                                         char[] path_chars = { '/', '\\' };
 452
 453                                         if (assembly.IndexOfAny (path_chars) != -1) {
 454                                                 a = Assembly.LoadFrom (assembly);
 455                                         } else {
 456                                                 string ass = assembly;
 457                                                 if (ass.EndsWith (".dll") || ass.EndsWith (".exe"))
 458                                                         ass = assembly.Substring (0, assembly.Length - 4);
 459                                                 a = Assembly.Load (ass);
 460                                         }
 461                                 } catch (FileNotFoundException) {
 462                                         bool err = !isImplicitReference;
 463                                         foreach (string dir in paths) {
 464                                                 string full_path = Path.Combine (dir, assembly);
 465                                                 if (!assembly.EndsWith (".dll") && !assembly.EndsWith (".exe"))
 466                                                         full_path += ".dll";
 467
 468                                                 try {
 469                                                         a = Assembly.LoadFrom (full_path);
 470                                                         err = false;
 471                                                         break;
 472                                                 } catch (FileNotFoundException) {
 473                                                 }
 474                                         }
 475
 476                                         if (err) {
 477                                                 Error_FileNotFound (assembly);
 478                                                 return a;
 479                                         }
 480                                 }
 481                         } catch (BadImageFormatException) {
 482                                 Error_FileCorrupted (assembly);
 483                         }
 484
 485                         return a;
 486                 }
 487
 488                 Module LoadModuleFile (AssemblyDefinitionDynamic assembly, string module)
 489                 {
 490                         string total_log = "";
 491
 492                         try {
 493                                 try {
 494                                         return assembly.IncludeModule (module);
 495                                 } catch (FileNotFoundException) {
 496                                         bool err = true;
 497                                         foreach (string dir in paths) {
 498                                                 string full_path = Path.Combine (dir, module);
 499                                                 if (!module.EndsWith (".netmodule"))
 500                                                         full_path += ".netmodule";
 501
 502                                                 try {
 503                                                         return assembly.IncludeModule (full_path);
 504                                                 } catch (FileNotFoundException ff) {
 505                                                         total_log += ff.FusionLog;
 506                                                 }
 507                                         }
 508                                         if (err) {
 509                                                 Error_FileNotFound (module);
 510                                                 return null;
 511                                         }
 512                                 }
 513                         } catch (BadImageFormatException) {
 514                                 Error_FileCorrupted (module);
 515                         }
 516
 517                         return null;
 518                 }
 519
 520                 public void LoadModules (AssemblyDefinitionDynamic assembly, RootNamespace targetNamespace)
 521                 {
 522                         foreach (var moduleName in compiler.Settings.Modules) {
 523                                 var m = LoadModuleFile (assembly, moduleName);
 524                                 if (m == null)
 525                                         continue;
 526
 527                                 var md = importer.ImportModule (m, targetNamespace);
 528                                 assembly.AddModule (md);
 529                         }
 530                 }
 531
 532                 public override void LoadReferences (ModuleContainer module)
 533                 {
 534                         Assembly corlib;
 535                         List<Tuple<RootNamespace, Assembly>> loaded;
 536                         base.LoadReferencesCore (module, out corlib, out loaded);
 537
 538                         if (corlib == null)
 539                                 return;
 540
 541                         importer.ImportAssembly (corlib, module.GlobalRootNamespace);
 542                         foreach (var entry in loaded) {
 543                                 importer.ImportAssembly (entry.Item2, entry.Item1);
 544                         }
 545                 }
 546         }
 547 }