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

   1 //
   2 // MarkStep.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@gmail.com)
   6 //
   7 // (C) 2006 Jb Evain
   8 // (C) 2007 Novell, Inc.
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31 using System.Collections;
  32 using System.Linq;
  33
  34 using Mono.Cecil;
  35 using Mono.Cecil.Cil;
  36
  37 namespace Mono.Linker.Steps {
  38
  39         public class MarkStep : IStep {
  40
  41                 LinkContext _context;
  42                 Queue _methods;
  43                 ArrayList _virtual_methods;
  44
  45                 public AnnotationStore Annotations {
  46                         get { return _context.Annotations; }
  47                 }
  48
  49                 public MarkStep ()
  50                 {
  51                         _methods = new Queue ();
  52                         _virtual_methods = new ArrayList ();
  53                 }
  54
  55                 public void Process (LinkContext context)
  56                 {
  57                         _context = context;
  58
  59                         Initialize ();
  60                         Process ();
  61                 }
  62
  63                 void Initialize ()
  64                 {
  65                         foreach (AssemblyDefinition assembly in _context.GetAssemblies ())
  66                                 InitializeAssembly (assembly);
  67                 }
  68
  69                 protected virtual void InitializeAssembly (AssemblyDefinition assembly)
  70                 {
  71                         MarkAssembly (assembly);
  72                         foreach (TypeDefinition type in assembly.MainModule.Types) {
  73                                 if (!Annotations.IsMarked (type))
  74                                         continue;
  75
  76                                 InitializeType (type);
  77                         }
  78                 }
  79
  80                 void InitializeType (TypeDefinition type)
  81                 {
  82                         MarkType (type);
  83
  84                         if (type.HasFields)
  85                                 InitializeFields (type);
  86                         if (type.HasMethods)
  87                                 InitializeMethods (type.Methods);
  88
  89                         if (type.HasNestedTypes)
  90                                 foreach (var nested in type.NestedTypes)
  91                                         InitializeType (nested);
  92                 }
  93
  94                 void InitializeFields (TypeDefinition type)
  95                 {
  96                         foreach (FieldDefinition field in type.Fields)
  97                                 if (Annotations.IsMarked (field))
  98                                         MarkField (field);
  99                 }
 100
 101                 void InitializeMethods (ICollection methods)
 102                 {
 103                         foreach (MethodDefinition method in methods)
 104                                 if (Annotations.IsMarked (method))
 105                                         EnqueueMethod (method);
 106                 }
 107
 108                 void Process ()
 109                 {
 110                         if (QueueIsEmpty ())
 111                                 throw new InvalidOperationException ("No entry methods");
 112
 113                         while (!QueueIsEmpty ()) {
 114                                 ProcessQueue ();
 115                                 ProcessVirtualMethods ();
 116                         }
 117                 }
 118
 119                 void ProcessQueue ()
 120                 {
 121                         while (!QueueIsEmpty ()) {
 122                                 MethodDefinition method = (MethodDefinition) _methods.Dequeue ();
 123                                 ProcessMethod (method);
 124                         }
 125                 }
 126
 127                 bool QueueIsEmpty ()
 128                 {
 129                         return _methods.Count == 0;
 130                 }
 131
 132                 protected virtual void EnqueueMethod (MethodDefinition method)
 133                 {
 134                         _methods.Enqueue (method);
 135                 }
 136
 137                 void ProcessVirtualMethods ()
 138                 {
 139                         foreach (MethodDefinition method in _virtual_methods)
 140                                 ProcessVirtualMethod (method);
 141                 }
 142
 143                 void ProcessVirtualMethod (MethodDefinition method)
 144                 {
 145                         IList overrides = Annotations.GetOverrides (method);
 146                         if (overrides == null)
 147                                 return;
 148
 149                         foreach (MethodDefinition @override in overrides)
 150                                 ProcessOverride (@override);
 151                 }
 152
 153                 void ProcessOverride (MethodDefinition method)
 154                 {
 155                         if (!Annotations.IsMarked (method.DeclaringType))
 156                                 return;
 157
 158                         if (Annotations.IsProcessed (method))
 159                                 return;
 160
 161                         if (Annotations.IsMarked (method))
 162                                 return;
 163
 164                         MarkMethod (method);
 165                         ProcessVirtualMethod (method);
 166                 }
 167
 168                 void MarkMarshalSpec (IMarshalInfoProvider spec)
 169                 {
 170                         if (!spec.HasMarshalInfo)
 171                                 return;
 172
 173                         var marshaler = spec.MarshalInfo as CustomMarshalInfo;
 174                         if (marshaler == null)
 175                                 return;
 176
 177                         MarkType (marshaler.ManagedType);
 178                 }
 179
 180                 void MarkCustomAttributes (ICustomAttributeProvider provider)
 181                 {
 182                         if (!provider.HasCustomAttributes)
 183                                 return;
 184
 185                         foreach (CustomAttribute ca in provider.CustomAttributes)
 186                                 MarkCustomAttribute (ca);
 187                 }
 188
 189                 void MarkCustomAttribute (CustomAttribute ca)
 190                 {
 191                         MarkMethod (ca.Constructor);
 192
 193                         MarkCustomAttributeArguments (ca);
 194
 195                         TypeReference constructor_type = ca.Constructor.DeclaringType;
 196                         TypeDefinition type = constructor_type.Resolve ();
 197                         if (type == null)
 198                                 throw new ResolutionException (constructor_type);
 199
 200                         MarkCustomAttributeProperties (ca, type);
 201                         MarkCustomAttributeFields (ca, type);
 202                 }
 203
 204                 void MarkCustomAttributeProperties (CustomAttribute ca, TypeDefinition attribute)
 205                 {
 206                         foreach (var named_argument in ca.Properties) {
 207                                 PropertyDefinition property = GetProperty (attribute, named_argument.Name);
 208                                 if (property != null)
 209                                         MarkMethod (property.SetMethod);
 210
 211                                 MarkIfType (named_argument.Argument);
 212                         }
 213                 }
 214
 215                 PropertyDefinition GetProperty (TypeDefinition type, string propertyname)
 216                 {
 217                         while (type != null) {
 218                                 PropertyDefinition property = type.Properties.FirstOrDefault (p => p.Name == propertyname);
 219                                 if (property != null)
 220                                         return property;
 221
 222                                 type = type.BaseType != null ? ResolveTypeDefinition (type.BaseType) : null;
 223                         }
 224
 225                         return null;
 226                 }
 227
 228                 void MarkCustomAttributeFields (CustomAttribute ca, TypeDefinition attribute)
 229                 {
 230                         foreach (var named_argument in ca.Fields) {
 231                                 FieldDefinition field = GetField (attribute, named_argument.Name);
 232                                 if (field != null)
 233                                         MarkField (field);
 234
 235                                 MarkIfType (named_argument.Argument);
 236                         }
 237                 }
 238
 239                 FieldDefinition GetField (TypeDefinition type, string fieldname)
 240                 {
 241                         while (type != null) {
 242                                 FieldDefinition field = type.Fields.FirstOrDefault (f => f.Name == fieldname);
 243                                 if (field != null)
 244                                         return field;
 245
 246                                 type = type.BaseType != null ? ResolveTypeDefinition (type.BaseType) : null;
 247                         }
 248
 249                         return null;
 250                 }
 251
 252                 void MarkCustomAttributeArguments (CustomAttribute ca)
 253                 {
 254                         foreach (var argument in ca.ConstructorArguments)
 255                                 MarkIfType (argument);
 256                 }
 257
 258                 void MarkIfType (CustomAttributeArgument argument)
 259                 {
 260                         if (argument.Type.FullName != "System.Type")
 261                                 return;
 262
 263                         MarkType (argument.Type);
 264                         MarkType ((TypeReference) argument.Value);
 265                 }
 266
 267                 protected bool CheckProcessed (IMetadataTokenProvider provider)
 268                 {
 269                         if (Annotations.IsProcessed (provider))
 270                                 return true;
 271
 272                         Annotations.Processed (provider);
 273                         return false;
 274                 }
 275
 276                 void MarkAssembly (AssemblyDefinition assembly)
 277                 {
 278                         if (CheckProcessed (assembly))
 279                                 return;
 280
 281                         MarkCustomAttributes (assembly);
 282
 283                         foreach (ModuleDefinition module in assembly.Modules)
 284                                 MarkCustomAttributes (module);
 285                 }
 286
 287                 void MarkField (FieldReference reference)
 288                 {
 289 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 290 //                              return;
 291
 292                         FieldDefinition field = ResolveFieldDefinition (reference);
 293
 294                         if (field == null)
 295                                 throw new ResolutionException (reference);
 296
 297                         if (CheckProcessed (field))
 298                                 return;
 299
 300                         MarkType (field.DeclaringType);
 301                         MarkType (field.FieldType);
 302                         MarkCustomAttributes (field);
 303                         MarkMarshalSpec (field);
 304
 305                         Annotations.Mark (field);
 306                 }
 307
 308                 protected virtual bool IgnoreScope (IMetadataScope scope)
 309                 {
 310                         AssemblyDefinition assembly = ResolveAssembly (scope);
 311                         return Annotations.GetAction (assembly) != AssemblyAction.Link;
 312                 }
 313
 314                 FieldDefinition ResolveFieldDefinition (FieldReference field)
 315                 {
 316                         FieldDefinition fd = field as FieldDefinition;
 317                         if (fd == null)
 318                                 fd = field.Resolve ();
 319
 320                         return fd;
 321                 }
 322
 323                 void MarkScope (IMetadataScope scope)
 324                 {
 325                         var provider = scope as IMetadataTokenProvider;
 326                         if (provider == null)
 327                                 return;
 328
 329                         Annotations.Mark (provider);
 330                 }
 331
 332                 protected virtual void MarkType (TypeReference reference)
 333                 {
 334                         if (reference == null)
 335                                 return;
 336
 337                         reference = GetOriginalType (reference);
 338
 339                         if (reference is GenericParameter)
 340                                 return;
 341
 342 //                      if (IgnoreScope (reference.Scope))
 343 //                              return;
 344
 345                         TypeDefinition type = ResolveTypeDefinition (reference);
 346
 347                         if (type == null)
 348                                 throw new ResolutionException (reference);
 349
 350                         if (CheckProcessed (type))
 351                                 return;
 352
 353                         MarkScope (type.Scope);
 354                         MarkType (type.BaseType);
 355                         MarkType (type.DeclaringType);
 356                         MarkCustomAttributes (type);
 357
 358                         if (IsMulticastDelegate (type)) {
 359                                 MarkMethodCollection (type.Methods);
 360                         }
 361
 362                         if (IsSerializable (type) && type.HasMethods) {
 363                                 MarkMethodsIf (type.Methods, IsDefaultConstructorPredicate);
 364                                 MarkMethodsIf (type.Methods, IsSpecialSerializationConstructorPredicate);
 365                         }
 366
 367                         MarkTypeSpecialCustomAttributes (type);
 368
 369                         MarkGenericParameterProvider (type);
 370
 371                         if (type.IsValueType)
 372                                 MarkFields (type);
 373
 374                         if (type.HasInterfaces) {
 375                                 foreach (TypeReference iface in type.Interfaces)
 376                                         MarkType (iface);
 377                         }
 378
 379                         if (type.HasMethods) {
 380                                 MarkMethodsIf (type.Methods, IsVirtualAndHasPreservedParent);
 381                                 MarkMethodsIf (type.Methods, IsStaticConstructorPredicate);
 382                         }
 383
 384                         Annotations.Mark (type);
 385
 386                         ApplyPreserveInfo (type);
 387                 }
 388
 389                 void MarkTypeSpecialCustomAttributes (TypeDefinition type)
 390                 {
 391                         if (!type.HasCustomAttributes)
 392                                 return;
 393
 394                         foreach (CustomAttribute attribute in type.CustomAttributes) {
 395                                 switch (attribute.Constructor.DeclaringType.FullName) {
 396                                 case "System.Xml.Serialization.XmlSchemaProviderAttribute":
 397                                         MarkXmlSchemaProvider (type, attribute);
 398                                         break;
 399                                 }
 400                         }
 401                 }
 402
 403                 void MarkMethodSpecialCustomAttributes (MethodDefinition method)
 404                 {
 405                         if (!method.HasCustomAttributes)
 406                                 return;
 407
 408                         foreach (CustomAttribute attribute in method.CustomAttributes) {
 409                                 switch (attribute.Constructor.DeclaringType.FullName) {
 410                                 case "System.Web.Services.Protocols.SoapHeaderAttribute":
 411                                         MarkSoapHeader (method, attribute);
 412                                         break;
 413                                 }
 414                         }
 415                 }
 416
 417                 void MarkXmlSchemaProvider (TypeDefinition type, CustomAttribute attribute)
 418                 {
 419                         string method_name;
 420                         if (!TryGetStringArgument (attribute, out method_name))
 421                                 return;
 422
 423                         MarkNamedMethod (type, method_name);
 424                 }
 425
 426                 static bool TryGetStringArgument (CustomAttribute attribute, out string argument)
 427                 {
 428                         argument = null;
 429
 430                         if (attribute.ConstructorArguments.Count < 1)
 431                                 return false;
 432
 433                         argument = attribute.ConstructorArguments [0].Value as string;
 434
 435                         return argument != null;
 436                 }
 437
 438                 void MarkNamedMethod (TypeDefinition type, string method_name)
 439                 {
 440                         if (!type.HasMethods)
 441                                 return;
 442
 443                         foreach (MethodDefinition method in type.Methods) {
 444                                 if (method.Name != method_name)
 445                                         continue;
 446
 447                                 MarkMethod (method);
 448                         }
 449                 }
 450
 451                 void MarkSoapHeader (MethodDefinition method, CustomAttribute attribute)
 452                 {
 453                         string member_name;
 454                         if (!TryGetStringArgument (attribute, out member_name))
 455                                 return;
 456
 457                         MarkNamedField (method.DeclaringType, member_name);
 458                         MarkNamedProperty (method.DeclaringType, member_name);
 459                 }
 460
 461                 void MarkNamedField (TypeDefinition type, string field_name)
 462                 {
 463                         if (!type.HasFields)
 464                                 return;
 465
 466                         foreach (FieldDefinition field in type.Fields) {
 467                                 if (field.Name != field_name)
 468                                         continue;
 469
 470                                 MarkField (field);
 471                         }
 472                 }
 473
 474                 void MarkNamedProperty (TypeDefinition type, string property_name)
 475                 {
 476                         if (!type.HasProperties)
 477                                 return;
 478
 479                         foreach (PropertyDefinition property in type.Properties) {
 480                                 if (property.Name != property_name)
 481                                         continue;
 482
 483                                 MarkMethod (property.GetMethod);
 484                                 MarkMethod (property.SetMethod);
 485                         }
 486                 }
 487
 488                 void MarkGenericParameterProvider (IGenericParameterProvider provider)
 489                 {
 490                         if (!provider.HasGenericParameters)
 491                                 return;
 492
 493                         foreach (GenericParameter parameter in provider.GenericParameters)
 494                                 MarkGenericParameter (parameter);
 495                 }
 496
 497                 void MarkGenericParameter (GenericParameter parameter)
 498                 {
 499                         MarkCustomAttributes (parameter);
 500                         foreach (TypeReference constraint in parameter.Constraints)
 501                                 MarkType (constraint);
 502                 }
 503
 504                 bool IsVirtualAndHasPreservedParent (MethodDefinition method)
 505                 {
 506                         if (!method.IsVirtual)
 507                                 return false;
 508
 509                         var base_list = Annotations.GetBaseMethods (method);
 510                         if (base_list == null)
 511                                 return false;
 512
 513                         foreach (MethodDefinition @base in base_list) {
 514                                 if (IgnoreScope (@base.DeclaringType.Scope))
 515                                         return true;
 516
 517                                 if (IsVirtualAndHasPreservedParent (@base))
 518                                         return true;
 519                         }
 520
 521                         return false;
 522                 }
 523
 524                 static MethodPredicate IsSpecialSerializationConstructorPredicate = new MethodPredicate (IsSpecialSerializationConstructor);
 525
 526                 static bool IsSpecialSerializationConstructor (MethodDefinition method)
 527                 {
 528                         if (!IsConstructor (method))
 529                                 return false;
 530
 531                         var parameters = method.Parameters;
 532                         if (parameters.Count != 2)
 533                                 return false;
 534
 535                         return parameters [0].ParameterType.Name == "SerializationInfo" &&
 536                                 parameters [1].ParameterType.Name == "StreamingContext";
 537                 }
 538
 539                 delegate bool MethodPredicate (MethodDefinition method);
 540
 541                 void MarkMethodsIf (ICollection methods, MethodPredicate predicate)
 542                 {
 543                         foreach (MethodDefinition method in methods)
 544                                 if (predicate (method))
 545                                         MarkMethod (method);
 546                 }
 547
 548                 static MethodPredicate IsDefaultConstructorPredicate = new MethodPredicate (IsDefaultConstructor);
 549
 550                 static bool IsDefaultConstructor (MethodDefinition method)
 551                 {
 552                         return IsConstructor (method) && method.Parameters.Count == 0;
 553                 }
 554
 555                 static bool IsConstructor (MethodDefinition method)
 556                 {
 557                         return method.IsConstructor && !method.IsStatic;
 558                 }
 559
 560                 static MethodPredicate IsStaticConstructorPredicate = new MethodPredicate (IsStaticConstructor);
 561
 562                 static bool IsStaticConstructor (MethodDefinition method)
 563                 {
 564                         return method.IsConstructor && method.IsStatic;
 565                 }
 566
 567                 static bool IsSerializable (TypeDefinition td)
 568                 {
 569                         return (td.Attributes & TypeAttributes.Serializable) != 0;
 570                 }
 571
 572                 static bool IsMulticastDelegate (TypeDefinition td)
 573                 {
 574                         return td.BaseType != null && td.BaseType.FullName == "System.MulticastDelegate";
 575                 }
 576
 577                 TypeDefinition ResolveTypeDefinition (TypeReference type)
 578                 {
 579                         TypeDefinition td = type as TypeDefinition;
 580                         if (td == null)
 581                                 td = type.Resolve ();
 582
 583                         return td;
 584                 }
 585
 586                 protected TypeReference GetOriginalType (TypeReference type)
 587                 {
 588                         while (type is TypeSpecification) {
 589                                 GenericInstanceType git = type as GenericInstanceType;
 590                                 if (git != null)
 591                                         MarkGenericArguments (git);
 592
 593                                 var mod = type as IModifierType;
 594                                 if (mod != null)
 595                                         MarkModifierType (mod);
 596
 597                                 type = ((TypeSpecification) type).ElementType;
 598                         }
 599
 600                         return type;
 601                 }
 602
 603                 void MarkModifierType (IModifierType mod)
 604                 {
 605                         MarkType (mod.ModifierType);
 606                 }
 607
 608                 void MarkGenericArguments (IGenericInstance instance)
 609                 {
 610                         foreach (TypeReference argument in instance.GenericArguments)
 611                                 MarkType (argument);
 612
 613                         MarkGenericArgumentConstructors (instance);
 614                 }
 615
 616                 void MarkGenericArgumentConstructors (IGenericInstance instance)
 617                 {
 618                         var arguments = instance.GenericArguments;
 619
 620                         var generic_element = GetGenericProviderFromInstance (instance);
 621                         if (generic_element == null)
 622                                 return;
 623
 624                         var parameters = generic_element.GenericParameters;
 625
 626                         if (arguments.Count != parameters.Count)
 627                                 return;
 628
 629                         for (int i = 0; i < arguments.Count; i++) {
 630                                 var argument = arguments [i];
 631                                 var parameter = parameters [i];
 632
 633                                 if (!parameter.HasDefaultConstructorConstraint)
 634                                         continue;
 635
 636                                 var argument_definition = ResolveTypeDefinition (argument);
 637                                 if (argument_definition == null)
 638                                         continue;
 639
 640                                 MarkMethodsIf (argument_definition.Methods, ctor => !ctor.IsStatic && !ctor.HasParameters);
 641                         }
 642                 }
 643
 644                 IGenericParameterProvider GetGenericProviderFromInstance (IGenericInstance instance)
 645                 {
 646                         var method = instance as GenericInstanceMethod;
 647                         if (method != null)
 648                                 return method.ElementMethod;
 649
 650                         var type = instance as GenericInstanceType;
 651                         if (type != null)
 652                                 return type.ElementType;
 653
 654                         return null;
 655                 }
 656
 657                 void ApplyPreserveInfo (TypeDefinition type)
 658                 {
 659                         ApplyPreserveMethods (type);
 660
 661                         if (!Annotations.IsPreserved (type))
 662                                 return;
 663
 664                         switch (Annotations.GetPreserve (type)) {
 665                         case TypePreserve.All:
 666                                 MarkFields (type);
 667                                 MarkMethods (type);
 668                                 break;
 669                         case TypePreserve.Fields:
 670                                 MarkFields (type);
 671                                 break;
 672                         case TypePreserve.Methods:
 673                                 MarkMethods (type);
 674                                 break;
 675                         }
 676                 }
 677
 678                 void ApplyPreserveMethods (TypeDefinition type)
 679                 {
 680                         var list = Annotations.GetPreservedMethods (type);
 681                         if (list == null)
 682                                 return;
 683
 684                         foreach (MethodDefinition method in list)
 685                                 MarkMethod (method);
 686                 }
 687
 688                 void MarkFields (TypeDefinition type)
 689                 {
 690                         if (!type.HasFields)
 691                                 return;
 692
 693                         foreach (FieldDefinition field in type.Fields)
 694                                 MarkField (field);
 695                 }
 696
 697                 void MarkMethods (TypeDefinition type)
 698                 {
 699                         if (type.HasMethods)
 700                                 MarkMethodCollection (type.Methods);
 701                 }
 702
 703                 void MarkMethodCollection (IEnumerable methods)
 704                 {
 705                         foreach (MethodDefinition method in methods)
 706                                 MarkMethod (method);
 707                 }
 708
 709                 void MarkMethod (MethodReference reference)
 710                 {
 711                         reference = GetOriginalMethod (reference);
 712
 713                         if (reference.DeclaringType is ArrayType)
 714                                 return;
 715
 716 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 717 //                              return;
 718
 719                         MethodDefinition method = ResolveMethodDefinition (reference);
 720
 721                         if (method == null)
 722                                 throw new ResolutionException (reference);
 723
 724                         if (Annotations.GetAction (method) == MethodAction.Nothing)
 725                                 Annotations.SetAction (method, MethodAction.Parse);
 726
 727                         EnqueueMethod (method);
 728                 }
 729
 730                 AssemblyDefinition ResolveAssembly (IMetadataScope scope)
 731                 {
 732                         AssemblyDefinition assembly = _context.Resolve (scope);
 733                         MarkAssembly (assembly);
 734                         return assembly;
 735                 }
 736
 737                 MethodReference GetOriginalMethod (MethodReference method)
 738                 {
 739                         while (method is MethodSpecification) {
 740                                 GenericInstanceMethod gim = method as GenericInstanceMethod;
 741                                 if (gim != null)
 742                                         MarkGenericArguments (gim);
 743
 744                                 method = ((MethodSpecification) method).ElementMethod;
 745                         }
 746
 747                         return method;
 748                 }
 749
 750                 MethodDefinition ResolveMethodDefinition (MethodReference method)
 751                 {
 752                         MethodDefinition md = method as MethodDefinition;
 753                         if (md == null)
 754                                 md = method.Resolve ();
 755
 756                         return md;
 757                 }
 758
 759                 void ProcessMethod (MethodDefinition method)
 760                 {
 761                         if (CheckProcessed (method))
 762                                 return;
 763
 764                         MarkType (method.DeclaringType);
 765                         MarkCustomAttributes (method);
 766
 767                         MarkGenericParameterProvider (method);
 768
 769                         if (IsPropertyMethod (method))
 770                                 MarkProperty (GetProperty (method));
 771                         else if (IsEventMethod (method))
 772                                 MarkEvent (GetEvent (method));
 773
 774                         if (method.HasParameters) {
 775                                 foreach (ParameterDefinition pd in method.Parameters) {
 776                                         MarkType (pd.ParameterType);
 777                                         MarkCustomAttributes (pd);
 778                                         MarkMarshalSpec (pd);
 779                                 }
 780                         }
 781
 782                         if (method.HasOverrides) {
 783                                 foreach (MethodReference ov in method.Overrides)
 784                                         MarkMethod (ov);
 785                         }
 786
 787                         MarkMethodSpecialCustomAttributes (method);
 788
 789                         if (method.IsVirtual)
 790                                 _virtual_methods.Add (method);
 791
 792                         MarkBaseMethods (method);
 793
 794                         MarkType (method.ReturnType);
 795                         MarkCustomAttributes (method.MethodReturnType);
 796                         MarkMarshalSpec (method.MethodReturnType);
 797
 798                         if (ShouldParseMethodBody (method))
 799                                 MarkMethodBody (method.Body);
 800
 801                         Annotations.Mark (method);
 802                 }
 803
 804                 void MarkBaseMethods (MethodDefinition method)
 805                 {
 806                         IList base_methods = Annotations.GetBaseMethods (method);
 807                         if (base_methods == null)
 808                                 return;
 809
 810                         foreach (MethodDefinition base_method in base_methods) {
 811                                 MarkMethod (base_method);
 812                                 MarkBaseMethods (base_method);
 813                         }
 814                 }
 815
 816                 bool ShouldParseMethodBody (MethodDefinition method)
 817                 {
 818                         if (!method.HasBody)
 819                                 return false;
 820
 821                         AssemblyDefinition assembly = ResolveAssembly (method.DeclaringType.Scope);
 822                         return (Annotations.GetAction (method) == MethodAction.ForceParse ||
 823                                 (Annotations.GetAction (assembly) == AssemblyAction.Link && Annotations.GetAction (method) == MethodAction.Parse));
 824                 }
 825
 826                 static bool IsPropertyMethod (MethodDefinition md)
 827                 {
 828                         return (md.SemanticsAttributes & MethodSemanticsAttributes.Getter) != 0 ||
 829                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Setter) != 0;
 830                 }
 831
 832                 static bool IsEventMethod (MethodDefinition md)
 833                 {
 834                         return (md.SemanticsAttributes & MethodSemanticsAttributes.AddOn) != 0 ||
 835                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Fire) != 0 ||
 836                                 (md.SemanticsAttributes & MethodSemanticsAttributes.RemoveOn) != 0;
 837                 }
 838
 839                 static PropertyDefinition GetProperty (MethodDefinition md)
 840                 {
 841                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
 842                         foreach (PropertyDefinition prop in declaringType.Properties)
 843                                 if (prop.GetMethod == md || prop.SetMethod == md)
 844                                         return prop;
 845
 846                         return null;
 847                 }
 848
 849                 static EventDefinition GetEvent (MethodDefinition md)
 850                 {
 851                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
 852                         foreach (EventDefinition evt in declaringType.Events)
 853                                 if (evt.AddMethod == md || evt.InvokeMethod == md || evt.RemoveMethod == md)
 854                                         return evt;
 855
 856                         return null;
 857                 }
 858
 859                 void MarkProperty (PropertyDefinition prop)
 860                 {
 861                         MarkCustomAttributes (prop);
 862                 }
 863
 864                 void MarkEvent (EventDefinition evt)
 865                 {
 866                         MarkCustomAttributes (evt);
 867                         MarkMethodIfNotNull (evt.AddMethod);
 868                         MarkMethodIfNotNull (evt.InvokeMethod);
 869                         MarkMethodIfNotNull (evt.RemoveMethod);
 870                 }
 871
 872                 void MarkMethodIfNotNull (MethodReference method)
 873                 {
 874                         if (method == null)
 875                                 return;
 876
 877                         MarkMethod (method);
 878                 }
 879
 880                 void MarkMethodBody (MethodBody body)
 881                 {
 882                         foreach (VariableDefinition var in body.Variables)
 883                                 MarkType (var.VariableType);
 884
 885                         foreach (ExceptionHandler eh in body.ExceptionHandlers)
 886                                 if (eh.HandlerType == ExceptionHandlerType.Catch)
 887                                         MarkType (eh.CatchType);
 888
 889                         foreach (Instruction instruction in body.Instructions)
 890                                 MarkInstruction (instruction);
 891                 }
 892
 893                 void MarkInstruction (Instruction instruction)
 894                 {
 895                         switch (instruction.OpCode.OperandType) {
 896                         case OperandType.InlineField:
 897                                 MarkField ((FieldReference) instruction.Operand);
 898                                 break;
 899                         case OperandType.InlineMethod:
 900                                 MarkMethod ((MethodReference) instruction.Operand);
 901                                 break;
 902                         case OperandType.InlineTok:
 903                                 object token = instruction.Operand;
 904                                 if (token is TypeReference)
 905                                         MarkType ((TypeReference) token);
 906                                 else if (token is MethodReference)
 907                                         MarkMethod ((MethodReference) token);
 908                                 else
 909                                         MarkField ((FieldReference) token);
 910                                 break;
 911                         case OperandType.InlineType:
 912                                 MarkType ((TypeReference) instruction.Operand);
 913                                 break;
 914                         default:
 915                                 break;
 916                         }
 917                 }
 918         }
 919 }