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                 protected LinkContext _context;
  42                 protected Queue _methods;
  43                 protected 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 virtual 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                                         if (Annotations.IsMarked (nested))
  92                                                 InitializeType (nested);
  93                                 }
  94                         }
  95                 }
  96
  97                 void InitializeFields (TypeDefinition type)
  98                 {
  99                         foreach (FieldDefinition field in type.Fields)
 100                                 if (Annotations.IsMarked (field))
 101                                         MarkField (field);
 102                 }
 103
 104                 void InitializeMethods (ICollection methods)
 105                 {
 106                         foreach (MethodDefinition method in methods)
 107                                 if (Annotations.IsMarked (method))
 108                                         EnqueueMethod (method);
 109                 }
 110
 111                 void Process ()
 112                 {
 113                         if (QueueIsEmpty ())
 114                                 throw new InvalidOperationException ("No entry methods");
 115
 116                         while (!QueueIsEmpty ()) {
 117                                 ProcessQueue ();
 118                                 ProcessVirtualMethods ();
 119                         }
 120                 }
 121
 122                 void ProcessQueue ()
 123                 {
 124                         while (!QueueIsEmpty ()) {
 125                                 MethodDefinition method = (MethodDefinition) _methods.Dequeue ();
 126                                 ProcessMethod (method);
 127                         }
 128                 }
 129
 130                 bool QueueIsEmpty ()
 131                 {
 132                         return _methods.Count == 0;
 133                 }
 134
 135                 protected virtual void EnqueueMethod (MethodDefinition method)
 136                 {
 137                         _methods.Enqueue (method);
 138                 }
 139
 140                 void ProcessVirtualMethods ()
 141                 {
 142                         foreach (MethodDefinition method in _virtual_methods)
 143                                 ProcessVirtualMethod (method);
 144                 }
 145
 146                 void ProcessVirtualMethod (MethodDefinition method)
 147                 {
 148                         IList overrides = Annotations.GetOverrides (method);
 149                         if (overrides == null)
 150                                 return;
 151
 152                         foreach (MethodDefinition @override in overrides)
 153                                 ProcessOverride (@override);
 154                 }
 155
 156                 void ProcessOverride (MethodDefinition method)
 157                 {
 158                         if (!Annotations.IsMarked (method.DeclaringType))
 159                                 return;
 160
 161                         if (Annotations.IsProcessed (method))
 162                                 return;
 163
 164                         if (Annotations.IsMarked (method))
 165                                 return;
 166
 167                         MarkMethod (method);
 168                         ProcessVirtualMethod (method);
 169                 }
 170
 171                 void MarkMarshalSpec (IMarshalInfoProvider spec)
 172                 {
 173                         if (!spec.HasMarshalInfo)
 174                                 return;
 175
 176                         var marshaler = spec.MarshalInfo as CustomMarshalInfo;
 177                         if (marshaler == null)
 178                                 return;
 179
 180                         MarkType (marshaler.ManagedType);
 181                 }
 182
 183                 void MarkCustomAttributes (ICustomAttributeProvider provider)
 184                 {
 185                         if (!provider.HasCustomAttributes)
 186                                 return;
 187
 188                         foreach (CustomAttribute ca in provider.CustomAttributes)
 189                                 MarkCustomAttribute (ca);
 190                 }
 191
 192                 protected virtual void MarkCustomAttribute (CustomAttribute ca)
 193                 {
 194                         MarkMethod (ca.Constructor);
 195
 196                         MarkCustomAttributeArguments (ca);
 197
 198                         TypeReference constructor_type = ca.Constructor.DeclaringType;
 199                         TypeDefinition type = constructor_type.Resolve ();
 200                         if (type == null)
 201                                 throw new ResolutionException (constructor_type);
 202
 203                         MarkCustomAttributeProperties (ca, type);
 204                         MarkCustomAttributeFields (ca, type);
 205                 }
 206
 207                 void MarkCustomAttributeProperties (CustomAttribute ca, TypeDefinition attribute)
 208                 {
 209                         if (!ca.HasProperties)
 210                                 return;
 211
 212                         foreach (var named_argument in ca.Properties) {
 213                                 PropertyDefinition property = GetProperty (attribute, named_argument.Name);
 214                                 if (property != null)
 215                                         MarkMethod (property.SetMethod);
 216
 217                                 MarkIfType (named_argument.Argument);
 218                         }
 219                 }
 220
 221                 PropertyDefinition GetProperty (TypeDefinition type, string propertyname)
 222                 {
 223                         while (type != null) {
 224                                 PropertyDefinition property = type.Properties.FirstOrDefault (p => p.Name == propertyname);
 225                                 if (property != null)
 226                                         return property;
 227
 228                                 type = type.BaseType != null ? ResolveTypeDefinition (type.BaseType) : null;
 229                         }
 230
 231                         return null;
 232                 }
 233
 234                 void MarkCustomAttributeFields (CustomAttribute ca, TypeDefinition attribute)
 235                 {
 236                         if (!ca.HasFields)
 237                                 return;
 238
 239                         foreach (var named_argument in ca.Fields) {
 240                                 FieldDefinition field = GetField (attribute, named_argument.Name);
 241                                 if (field != null)
 242                                         MarkField (field);
 243
 244                                 MarkIfType (named_argument.Argument);
 245                         }
 246                 }
 247
 248                 FieldDefinition GetField (TypeDefinition type, string fieldname)
 249                 {
 250                         while (type != null) {
 251                                 FieldDefinition field = type.Fields.FirstOrDefault (f => f.Name == fieldname);
 252                                 if (field != null)
 253                                         return field;
 254
 255                                 type = type.BaseType != null ? ResolveTypeDefinition (type.BaseType) : null;
 256                         }
 257
 258                         return null;
 259                 }
 260
 261                 void MarkCustomAttributeArguments (CustomAttribute ca)
 262                 {
 263                         if (!ca.HasConstructorArguments)
 264                                 return;
 265
 266                         foreach (var argument in ca.ConstructorArguments)
 267                                 MarkIfType (argument);
 268                 }
 269
 270                 void MarkIfType (CustomAttributeArgument argument)
 271                 {
 272                         var at = argument.Type;
 273                         if (at.IsArray) {
 274                                 var et = at.GetElementType ();
 275                                 if (et.Namespace != "System" || et.Name != "Type")
 276                                         return;
 277
 278                                 MarkType (et);
 279                                 foreach (var cac in (CustomAttributeArgument[]) argument.Value)
 280                                         MarkWithResolvedScope ((TypeReference) cac.Value);
 281                         } else if (at.Namespace == "System" && at.Name == "Type") {
 282                                 MarkType (argument.Type);
 283                                 MarkWithResolvedScope ((TypeReference) argument.Value);
 284                         }
 285                 }
 286
 287                 // custom attributes encoding means it's possible to have a scope that will point into a PCL facade
 288                 // even if we (just before saving) will resolve all type references (bug #26752)
 289                 void MarkWithResolvedScope (TypeReference type)
 290                 {
 291                         if (type == null)
 292                                 return;
 293                         var td = type.Resolve ();
 294                         if (td != null)
 295                                 type.Scope = td.Scope;
 296                         MarkType (type);
 297                 }
 298
 299                 protected bool CheckProcessed (IMetadataTokenProvider provider)
 300                 {
 301                         if (Annotations.IsProcessed (provider))
 302                                 return true;
 303
 304                         Annotations.Processed (provider);
 305                         return false;
 306                 }
 307
 308                 void MarkAssembly (AssemblyDefinition assembly)
 309                 {
 310                         if (CheckProcessed (assembly))
 311                                 return;
 312
 313                         ProcessModule (assembly);
 314
 315                         MarkCustomAttributes (assembly);
 316
 317                         foreach (ModuleDefinition module in assembly.Modules)
 318                                 MarkCustomAttributes (module);
 319                 }
 320
 321                 void ProcessModule (AssemblyDefinition assembly)
 322                 {
 323                         // Pre-mark <Module> if there is any methods as they need to be executed
 324                         // at assembly load time
 325                         foreach (TypeDefinition type in assembly.MainModule.Types)
 326                         {
 327                                 if (type.Name == "<Module>" && type.HasMethods)
 328                                 {
 329                                         MarkType (type);
 330                                         break;
 331                                 }
 332                         }
 333                 }
 334
 335                 protected void MarkField (FieldReference reference)
 336                 {
 337 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 338 //                              return;
 339
 340                         if (reference.DeclaringType is GenericInstanceType)
 341                                 MarkType (reference.DeclaringType);
 342
 343                         FieldDefinition field = ResolveFieldDefinition (reference);
 344
 345                         if (field == null)
 346                                 throw new ResolutionException (reference);
 347
 348                         if (CheckProcessed (field))
 349                                 return;
 350
 351                         MarkType (field.DeclaringType);
 352                         MarkType (field.FieldType);
 353                         MarkCustomAttributes (field);
 354                         MarkMarshalSpec (field);
 355
 356                         Annotations.Mark (field);
 357                 }
 358
 359                 protected virtual bool IgnoreScope (IMetadataScope scope)
 360                 {
 361                         AssemblyDefinition assembly = ResolveAssembly (scope);
 362                         return Annotations.GetAction (assembly) != AssemblyAction.Link;
 363                 }
 364
 365                 FieldDefinition ResolveFieldDefinition (FieldReference field)
 366                 {
 367                         FieldDefinition fd = field as FieldDefinition;
 368                         if (fd == null)
 369                                 fd = field.Resolve ();
 370
 371                         return fd;
 372                 }
 373
 374                 void MarkScope (IMetadataScope scope)
 375                 {
 376                         var provider = scope as IMetadataTokenProvider;
 377                         if (provider == null)
 378                                 return;
 379
 380                         Annotations.Mark (provider);
 381                 }
 382
 383                 protected virtual void MarkSerializable (TypeDefinition type)
 384                 {
 385                         MarkDefaultConstructor (type);
 386                         MarkMethodsIf (type.Methods, IsSpecialSerializationConstructorPredicate);
 387                 }
 388
 389                 protected virtual TypeDefinition MarkType (TypeReference reference)
 390                 {
 391                         if (reference == null)
 392                                 return null;
 393
 394                         reference = GetOriginalType (reference);
 395
 396                         if (reference is GenericParameter)
 397                                 return null;
 398
 399 //                      if (IgnoreScope (reference.Scope))
 400 //                              return;
 401
 402                         TypeDefinition type = ResolveTypeDefinition (reference);
 403
 404                         if (type == null)
 405                                 throw new ResolutionException (reference);
 406
 407                         if (CheckProcessed (type))
 408                                 return null;
 409
 410                         MarkScope (type.Scope);
 411                         MarkType (type.BaseType);
 412                         MarkType (type.DeclaringType);
 413                         MarkCustomAttributes (type);
 414
 415                         if (IsMulticastDelegate (type)) {
 416                                 MarkMethodCollection (type.Methods);
 417                         }
 418
 419                         if (IsSerializable (type))
 420                                 MarkSerializable (type);
 421
 422                         MarkTypeSpecialCustomAttributes (type);
 423
 424                         MarkGenericParameterProvider (type);
 425
 426                         // keep fields for value-types and for classes with LayoutKind.Sequential or Explicit
 427                         if (type.IsValueType || !type.IsAutoLayout)
 428                                 MarkFields (type, type.IsEnum);
 429
 430                         if (type.HasInterfaces) {
 431                                 foreach (TypeReference iface in type.Interfaces)
 432                                         MarkType (iface);
 433                         }
 434
 435                         if (type.HasMethods) {
 436                                 MarkMethodsIf (type.Methods, IsVirtualAndHasPreservedParent);
 437                                 MarkMethodsIf (type.Methods, IsStaticConstructorPredicate);
 438                         }
 439
 440                         Annotations.Mark (type);
 441
 442                         ApplyPreserveInfo (type);
 443
 444                         return type;
 445                 }
 446
 447                 void MarkTypeSpecialCustomAttributes (TypeDefinition type)
 448                 {
 449                         if (!type.HasCustomAttributes)
 450                                 return;
 451
 452                         foreach (CustomAttribute attribute in type.CustomAttributes) {
 453                                 switch (attribute.Constructor.DeclaringType.FullName) {
 454                                 case "System.Xml.Serialization.XmlSchemaProviderAttribute":
 455                                         MarkXmlSchemaProvider (type, attribute);
 456                                         break;
 457                                 }
 458                         }
 459                 }
 460
 461                 void MarkMethodSpecialCustomAttributes (MethodDefinition method)
 462                 {
 463                         if (!method.HasCustomAttributes)
 464                                 return;
 465
 466                         foreach (CustomAttribute attribute in method.CustomAttributes) {
 467                                 switch (attribute.Constructor.DeclaringType.FullName) {
 468                                 case "System.Web.Services.Protocols.SoapHeaderAttribute":
 469                                         MarkSoapHeader (method, attribute);
 470                                         break;
 471                                 }
 472                         }
 473                 }
 474
 475                 void MarkXmlSchemaProvider (TypeDefinition type, CustomAttribute attribute)
 476                 {
 477                         string method_name;
 478                         if (!TryGetStringArgument (attribute, out method_name))
 479                                 return;
 480
 481                         MarkNamedMethod (type, method_name);
 482                 }
 483
 484                 static bool TryGetStringArgument (CustomAttribute attribute, out string argument)
 485                 {
 486                         argument = null;
 487
 488                         if (attribute.ConstructorArguments.Count < 1)
 489                                 return false;
 490
 491                         argument = attribute.ConstructorArguments [0].Value as string;
 492
 493                         return argument != null;
 494                 }
 495
 496                 protected void MarkNamedMethod (TypeDefinition type, string method_name)
 497                 {
 498                         if (!type.HasMethods)
 499                                 return;
 500
 501                         foreach (MethodDefinition method in type.Methods) {
 502                                 if (method.Name != method_name)
 503                                         continue;
 504
 505                                 MarkMethod (method);
 506                         }
 507                 }
 508
 509                 void MarkSoapHeader (MethodDefinition method, CustomAttribute attribute)
 510                 {
 511                         string member_name;
 512                         if (!TryGetStringArgument (attribute, out member_name))
 513                                 return;
 514
 515                         MarkNamedField (method.DeclaringType, member_name);
 516                         MarkNamedProperty (method.DeclaringType, member_name);
 517                 }
 518
 519                 void MarkNamedField (TypeDefinition type, string field_name)
 520                 {
 521                         if (!type.HasFields)
 522                                 return;
 523
 524                         foreach (FieldDefinition field in type.Fields) {
 525                                 if (field.Name != field_name)
 526                                         continue;
 527
 528                                 MarkField (field);
 529                         }
 530                 }
 531
 532                 void MarkNamedProperty (TypeDefinition type, string property_name)
 533                 {
 534                         if (!type.HasProperties)
 535                                 return;
 536
 537                         foreach (PropertyDefinition property in type.Properties) {
 538                                 if (property.Name != property_name)
 539                                         continue;
 540
 541                                 MarkMethod (property.GetMethod);
 542                                 MarkMethod (property.SetMethod);
 543                         }
 544                 }
 545
 546                 void MarkGenericParameterProvider (IGenericParameterProvider provider)
 547                 {
 548                         if (!provider.HasGenericParameters)
 549                                 return;
 550
 551                         foreach (GenericParameter parameter in provider.GenericParameters)
 552                                 MarkGenericParameter (parameter);
 553                 }
 554
 555                 void MarkGenericParameter (GenericParameter parameter)
 556                 {
 557                         MarkCustomAttributes (parameter);
 558                         foreach (TypeReference constraint in parameter.Constraints)
 559                                 MarkType (constraint);
 560                 }
 561
 562                 bool IsVirtualAndHasPreservedParent (MethodDefinition method)
 563                 {
 564                         if (!method.IsVirtual)
 565                                 return false;
 566
 567                         var base_list = Annotations.GetBaseMethods (method);
 568                         if (base_list == null)
 569                                 return false;
 570
 571                         foreach (MethodDefinition @base in base_list) {
 572                                 if (IgnoreScope (@base.DeclaringType.Scope))
 573                                         return true;
 574
 575                                 if (IsVirtualAndHasPreservedParent (@base))
 576                                         return true;
 577                         }
 578
 579                         return false;
 580                 }
 581
 582                 static MethodPredicate IsSpecialSerializationConstructorPredicate = new MethodPredicate (IsSpecialSerializationConstructor);
 583
 584                 static bool IsSpecialSerializationConstructor (MethodDefinition method)
 585                 {
 586                         if (!IsConstructor (method))
 587                                 return false;
 588
 589                         var parameters = method.Parameters;
 590                         if (parameters.Count != 2)
 591                                 return false;
 592
 593                         return parameters [0].ParameterType.Name == "SerializationInfo" &&
 594                                 parameters [1].ParameterType.Name == "StreamingContext";
 595                 }
 596
 597                 delegate bool MethodPredicate (MethodDefinition method);
 598
 599                 void MarkMethodsIf (ICollection methods, MethodPredicate predicate)
 600                 {
 601                         foreach (MethodDefinition method in methods)
 602                                 if (predicate (method))
 603                                         MarkMethod (method);
 604                 }
 605
 606                 static MethodPredicate IsDefaultConstructorPredicate = new MethodPredicate (IsDefaultConstructor);
 607
 608                 static bool IsDefaultConstructor (MethodDefinition method)
 609                 {
 610                         return IsConstructor (method) && !method.HasParameters;
 611                 }
 612
 613                 static bool IsConstructor (MethodDefinition method)
 614                 {
 615                         return method.IsConstructor && !method.IsStatic;
 616                 }
 617
 618                 protected void MarkDefaultConstructor (TypeDefinition type)
 619                 {
 620                         if ((type == null) || !type.HasMethods)
 621                                 return;
 622
 623                         MarkMethodsIf (type.Methods, IsDefaultConstructorPredicate);
 624                 }
 625
 626                 static MethodPredicate IsStaticConstructorPredicate = new MethodPredicate (IsStaticConstructor);
 627
 628                 static bool IsStaticConstructor (MethodDefinition method)
 629                 {
 630                         return method.IsConstructor && method.IsStatic;
 631                 }
 632
 633                 static bool IsSerializable (TypeDefinition td)
 634                 {
 635                         return (td.Attributes & TypeAttributes.Serializable) != 0;
 636                 }
 637
 638                 static bool IsMulticastDelegate (TypeDefinition td)
 639                 {
 640                         return td.BaseType != null && td.BaseType.FullName == "System.MulticastDelegate";
 641                 }
 642
 643                 protected TypeDefinition ResolveTypeDefinition (TypeReference type)
 644                 {
 645                         TypeDefinition td = type as TypeDefinition;
 646                         if (td == null)
 647                                 td = type.Resolve ();
 648
 649                         return td;
 650                 }
 651
 652                 protected TypeReference GetOriginalType (TypeReference type)
 653                 {
 654                         while (type is TypeSpecification) {
 655                                 GenericInstanceType git = type as GenericInstanceType;
 656                                 if (git != null)
 657                                         MarkGenericArguments (git);
 658
 659                                 var mod = type as IModifierType;
 660                                 if (mod != null)
 661                                         MarkModifierType (mod);
 662
 663                                 type = ((TypeSpecification) type).ElementType;
 664                         }
 665
 666                         return type;
 667                 }
 668
 669                 void MarkModifierType (IModifierType mod)
 670                 {
 671                         MarkType (mod.ModifierType);
 672                 }
 673
 674                 void MarkGenericArguments (IGenericInstance instance)
 675                 {
 676                         foreach (TypeReference argument in instance.GenericArguments)
 677                                 MarkType (argument);
 678
 679                         MarkGenericArgumentConstructors (instance);
 680                 }
 681
 682                 void MarkGenericArgumentConstructors (IGenericInstance instance)
 683                 {
 684                         var arguments = instance.GenericArguments;
 685
 686                         var generic_element = GetGenericProviderFromInstance (instance);
 687                         if (generic_element == null)
 688                                 return;
 689
 690                         var parameters = generic_element.GenericParameters;
 691
 692                         if (arguments.Count != parameters.Count)
 693                                 return;
 694
 695                         for (int i = 0; i < arguments.Count; i++) {
 696                                 var argument = arguments [i];
 697                                 var parameter = parameters [i];
 698
 699                                 if (!parameter.HasDefaultConstructorConstraint)
 700                                         continue;
 701
 702                                 var argument_definition = ResolveTypeDefinition (argument);
 703                                 if (argument_definition == null)
 704                                         continue;
 705
 706                                 MarkMethodsIf (argument_definition.Methods, ctor => !ctor.IsStatic && !ctor.HasParameters);
 707                         }
 708                 }
 709
 710                 IGenericParameterProvider GetGenericProviderFromInstance (IGenericInstance instance)
 711                 {
 712                         var method = instance as GenericInstanceMethod;
 713                         if (method != null)
 714                                 return ResolveMethodDefinition (method.ElementMethod);
 715
 716                         var type = instance as GenericInstanceType;
 717                         if (type != null)
 718                                 return ResolveTypeDefinition (type.ElementType);
 719
 720                         return null;
 721                 }
 722
 723                 void ApplyPreserveInfo (TypeDefinition type)
 724                 {
 725                         ApplyPreserveMethods (type);
 726
 727                         if (!Annotations.IsPreserved (type))
 728                                 return;
 729
 730                         switch (Annotations.GetPreserve (type)) {
 731                         case TypePreserve.All:
 732                                 MarkFields (type, true);
 733                                 MarkMethods (type);
 734                                 break;
 735                         case TypePreserve.Fields:
 736                                 MarkFields (type, true);
 737                                 break;
 738                         case TypePreserve.Methods:
 739                                 MarkMethods (type);
 740                                 break;
 741                         }
 742                 }
 743
 744                 void ApplyPreserveMethods (TypeDefinition type)
 745                 {
 746                         var list = Annotations.GetPreservedMethods (type);
 747                         if (list == null)
 748                                 return;
 749
 750                         MarkMethodCollection (list);
 751                 }
 752
 753                 void ApplyPreserveMethods (MethodDefinition method)
 754                 {
 755                         var list = Annotations.GetPreservedMethods (method);
 756                         if (list == null)
 757                                 return;
 758
 759                         MarkMethodCollection (list);
 760                 }
 761
 762                 protected void MarkFields (TypeDefinition type, bool includeStatic)
 763                 {
 764                         if (!type.HasFields)
 765                                 return;
 766
 767                         foreach (FieldDefinition field in type.Fields) {
 768                                 if (!includeStatic && field.IsStatic)
 769                                         continue;
 770                                 MarkField (field);
 771                         }
 772                 }
 773
 774                 protected virtual void MarkMethods (TypeDefinition type)
 775                 {
 776                         if (type.HasMethods)
 777                                 MarkMethodCollection (type.Methods);
 778                 }
 779
 780                 void MarkMethodCollection (IEnumerable methods)
 781                 {
 782                         foreach (MethodDefinition method in methods)
 783                                 MarkMethod (method);
 784                 }
 785
 786                 protected virtual MethodDefinition MarkMethod (MethodReference reference)
 787                 {
 788                         reference = GetOriginalMethod (reference);
 789
 790                         if (reference.DeclaringType is ArrayType)
 791                                 return null;
 792
 793                         if (reference.DeclaringType is GenericInstanceType)
 794                                 MarkType (reference.DeclaringType);
 795
 796 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 797 //                              return;
 798
 799                         MethodDefinition method = ResolveMethodDefinition (reference);
 800
 801                         if (method == null)
 802                                 throw new ResolutionException (reference);
 803
 804                         if (Annotations.GetAction (method) == MethodAction.Nothing)
 805                                 Annotations.SetAction (method, MethodAction.Parse);
 806
 807                         EnqueueMethod (method);
 808                         return method;
 809                 }
 810
 811                 AssemblyDefinition ResolveAssembly (IMetadataScope scope)
 812                 {
 813                         AssemblyDefinition assembly = _context.Resolve (scope);
 814                         MarkAssembly (assembly);
 815                         return assembly;
 816                 }
 817
 818                 protected MethodReference GetOriginalMethod (MethodReference method)
 819                 {
 820                         while (method is MethodSpecification) {
 821                                 GenericInstanceMethod gim = method as GenericInstanceMethod;
 822                                 if (gim != null)
 823                                         MarkGenericArguments (gim);
 824
 825                                 method = ((MethodSpecification) method).ElementMethod;
 826                         }
 827
 828                         return method;
 829                 }
 830
 831                 MethodDefinition ResolveMethodDefinition (MethodReference method)
 832                 {
 833                         MethodDefinition md = method as MethodDefinition;
 834                         if (md == null)
 835                                 md = method.Resolve ();
 836
 837                         return md;
 838                 }
 839
 840                 protected virtual void ProcessMethod (MethodDefinition method)
 841                 {
 842                         if (CheckProcessed (method))
 843                                 return;
 844
 845                         MarkType (method.DeclaringType);
 846                         MarkCustomAttributes (method);
 847
 848                         MarkGenericParameterProvider (method);
 849
 850                         if (IsPropertyMethod (method))
 851                                 MarkProperty (GetProperty (method));
 852                         else if (IsEventMethod (method))
 853                                 MarkEvent (GetEvent (method));
 854
 855                         if (method.HasParameters) {
 856                                 foreach (ParameterDefinition pd in method.Parameters) {
 857                                         MarkType (pd.ParameterType);
 858                                         MarkCustomAttributes (pd);
 859                                         MarkMarshalSpec (pd);
 860                                 }
 861                         }
 862
 863                         if (method.HasOverrides) {
 864                                 foreach (MethodReference ov in method.Overrides)
 865                                         MarkMethod (ov);
 866                         }
 867
 868                         MarkMethodSpecialCustomAttributes (method);
 869
 870                         if (method.IsVirtual)
 871                                 _virtual_methods.Add (method);
 872
 873                         MarkBaseMethods (method);
 874
 875                         MarkType (method.ReturnType);
 876                         MarkCustomAttributes (method.MethodReturnType);
 877                         MarkMarshalSpec (method.MethodReturnType);
 878
 879                         if (ShouldParseMethodBody (method))
 880                                 MarkMethodBody (method.Body);
 881
 882                         Annotations.Mark (method);
 883
 884                         ApplyPreserveMethods (method);
 885                 }
 886
 887                 void MarkBaseMethods (MethodDefinition method)
 888                 {
 889                         IList base_methods = Annotations.GetBaseMethods (method);
 890                         if (base_methods == null)
 891                                 return;
 892
 893                         foreach (MethodDefinition base_method in base_methods) {
 894                                 if (base_method.DeclaringType.IsInterface && !method.DeclaringType.IsInterface)
 895                                         continue;
 896
 897                                 MarkMethod (base_method);
 898                                 MarkBaseMethods (base_method);
 899                         }
 900                 }
 901
 902                 bool ShouldParseMethodBody (MethodDefinition method)
 903                 {
 904                         if (!method.HasBody)
 905                                 return false;
 906
 907                         AssemblyDefinition assembly = ResolveAssembly (method.DeclaringType.Scope);
 908                         return (Annotations.GetAction (method) == MethodAction.ForceParse ||
 909                                 (Annotations.GetAction (assembly) == AssemblyAction.Link && Annotations.GetAction (method) == MethodAction.Parse));
 910                 }
 911
 912                 static internal bool IsPropertyMethod (MethodDefinition md)
 913                 {
 914                         return (md.SemanticsAttributes & MethodSemanticsAttributes.Getter) != 0 ||
 915                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Setter) != 0;
 916                 }
 917
 918                 static bool IsEventMethod (MethodDefinition md)
 919                 {
 920                         return (md.SemanticsAttributes & MethodSemanticsAttributes.AddOn) != 0 ||
 921                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Fire) != 0 ||
 922                                 (md.SemanticsAttributes & MethodSemanticsAttributes.RemoveOn) != 0;
 923                 }
 924
 925                 static internal PropertyDefinition GetProperty (MethodDefinition md)
 926                 {
 927                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
 928                         foreach (PropertyDefinition prop in declaringType.Properties)
 929                                 if (prop.GetMethod == md || prop.SetMethod == md)
 930                                         return prop;
 931
 932                         return null;
 933                 }
 934
 935                 static EventDefinition GetEvent (MethodDefinition md)
 936                 {
 937                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
 938                         foreach (EventDefinition evt in declaringType.Events)
 939                                 if (evt.AddMethod == md || evt.InvokeMethod == md || evt.RemoveMethod == md)
 940                                         return evt;
 941
 942                         return null;
 943                 }
 944
 945                 protected void MarkProperty (PropertyDefinition prop)
 946                 {
 947                         MarkCustomAttributes (prop);
 948                 }
 949
 950                 protected void MarkEvent (EventDefinition evt)
 951                 {
 952                         MarkCustomAttributes (evt);
 953                         MarkMethodIfNotNull (evt.AddMethod);
 954                         MarkMethodIfNotNull (evt.InvokeMethod);
 955                         MarkMethodIfNotNull (evt.RemoveMethod);
 956                 }
 957
 958                 void MarkMethodIfNotNull (MethodReference method)
 959                 {
 960                         if (method == null)
 961                                 return;
 962
 963                         MarkMethod (method);
 964                 }
 965
 966                 protected virtual void MarkMethodBody (MethodBody body)
 967                 {
 968                         foreach (VariableDefinition var in body.Variables)
 969                                 MarkType (var.VariableType);
 970
 971                         foreach (ExceptionHandler eh in body.ExceptionHandlers)
 972                                 if (eh.HandlerType == ExceptionHandlerType.Catch)
 973                                         MarkType (eh.CatchType);
 974
 975                         foreach (Instruction instruction in body.Instructions)
 976                                 MarkInstruction (instruction);
 977                 }
 978
 979                 protected virtual void MarkInstruction (Instruction instruction)
 980                 {
 981                         switch (instruction.OpCode.OperandType) {
 982                         case OperandType.InlineField:
 983                                 MarkField ((FieldReference) instruction.Operand);
 984                                 break;
 985                         case OperandType.InlineMethod:
 986                                 MarkMethod ((MethodReference) instruction.Operand);
 987                                 break;
 988                         case OperandType.InlineTok:
 989                                 object token = instruction.Operand;
 990                                 if (token is TypeReference)
 991                                         MarkType ((TypeReference) token);
 992                                 else if (token is MethodReference)
 993                                         MarkMethod ((MethodReference) token);
 994                                 else
 995                                         MarkField ((FieldReference) token);
 996                                 break;
 997                         case OperandType.InlineType:
 998                                 MarkType ((TypeReference) instruction.Operand);
 999                                 break;
1000                         default:
1001                                 break;
1002                         }
1003                 }
1004         }
1005 }