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                         if (argument.Type.FullName != "System.Type")
 273                                 return;
 274
 275                         MarkType (argument.Type);
 276                         MarkType ((TypeReference) argument.Value);
 277                 }
 278
 279                 protected bool CheckProcessed (IMetadataTokenProvider provider)
 280                 {
 281                         if (Annotations.IsProcessed (provider))
 282                                 return true;
 283
 284                         Annotations.Processed (provider);
 285                         return false;
 286                 }
 287
 288                 void MarkAssembly (AssemblyDefinition assembly)
 289                 {
 290                         if (CheckProcessed (assembly))
 291                                 return;
 292
 293                         MarkCustomAttributes (assembly);
 294
 295                         foreach (ModuleDefinition module in assembly.Modules)
 296                                 MarkCustomAttributes (module);
 297                 }
 298
 299                 protected void MarkField (FieldReference reference)
 300                 {
 301 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 302 //                              return;
 303
 304                         if (reference.DeclaringType is GenericInstanceType)
 305                                 MarkType (reference.DeclaringType);
 306
 307                         FieldDefinition field = ResolveFieldDefinition (reference);
 308
 309                         if (field == null)
 310                                 throw new ResolutionException (reference);
 311
 312                         if (CheckProcessed (field))
 313                                 return;
 314
 315                         MarkType (field.DeclaringType);
 316                         MarkType (field.FieldType);
 317                         MarkCustomAttributes (field);
 318                         MarkMarshalSpec (field);
 319
 320                         Annotations.Mark (field);
 321                 }
 322
 323                 protected virtual bool IgnoreScope (IMetadataScope scope)
 324                 {
 325                         AssemblyDefinition assembly = ResolveAssembly (scope);
 326                         return Annotations.GetAction (assembly) != AssemblyAction.Link;
 327                 }
 328
 329                 FieldDefinition ResolveFieldDefinition (FieldReference field)
 330                 {
 331                         FieldDefinition fd = field as FieldDefinition;
 332                         if (fd == null)
 333                                 fd = field.Resolve ();
 334
 335                         return fd;
 336                 }
 337
 338                 void MarkScope (IMetadataScope scope)
 339                 {
 340                         var provider = scope as IMetadataTokenProvider;
 341                         if (provider == null)
 342                                 return;
 343
 344                         Annotations.Mark (provider);
 345                 }
 346
 347                 protected virtual void MarkSerializable (TypeDefinition type)
 348                 {
 349                         MarkDefaultConstructor (type);
 350                         MarkMethodsIf (type.Methods, IsSpecialSerializationConstructorPredicate);
 351                 }
 352
 353                 protected virtual TypeDefinition MarkType (TypeReference reference)
 354                 {
 355                         if (reference == null)
 356                                 return null;
 357
 358                         reference = GetOriginalType (reference);
 359
 360                         if (reference is GenericParameter)
 361                                 return null;
 362
 363 //                      if (IgnoreScope (reference.Scope))
 364 //                              return;
 365
 366                         TypeDefinition type = ResolveTypeDefinition (reference);
 367
 368                         if (type == null)
 369                                 throw new ResolutionException (reference);
 370
 371                         if (CheckProcessed (type))
 372                                 return null;
 373
 374                         MarkScope (type.Scope);
 375                         MarkType (type.BaseType);
 376                         MarkType (type.DeclaringType);
 377                         MarkCustomAttributes (type);
 378
 379                         if (IsMulticastDelegate (type)) {
 380                                 MarkMethodCollection (type.Methods);
 381                         }
 382
 383                         if (IsSerializable (type))
 384                                 MarkSerializable (type);
 385
 386                         MarkTypeSpecialCustomAttributes (type);
 387
 388                         MarkGenericParameterProvider (type);
 389
 390                         // keep fields for value-types and for classes with LayoutKind.Sequential or Explicit
 391                         if (type.IsValueType || !type.IsAutoLayout)
 392                                 MarkFields (type, type.IsEnum);
 393
 394                         if (type.HasInterfaces) {
 395                                 foreach (TypeReference iface in type.Interfaces)
 396                                         MarkType (iface);
 397                         }
 398
 399                         if (type.HasMethods) {
 400                                 MarkMethodsIf (type.Methods, IsVirtualAndHasPreservedParent);
 401                                 MarkMethodsIf (type.Methods, IsStaticConstructorPredicate);
 402                         }
 403
 404                         Annotations.Mark (type);
 405
 406                         ApplyPreserveInfo (type);
 407
 408                         return type;
 409                 }
 410
 411                 void MarkTypeSpecialCustomAttributes (TypeDefinition type)
 412                 {
 413                         if (!type.HasCustomAttributes)
 414                                 return;
 415
 416                         foreach (CustomAttribute attribute in type.CustomAttributes) {
 417                                 switch (attribute.Constructor.DeclaringType.FullName) {
 418                                 case "System.Xml.Serialization.XmlSchemaProviderAttribute":
 419                                         MarkXmlSchemaProvider (type, attribute);
 420                                         break;
 421                                 }
 422                         }
 423                 }
 424
 425                 void MarkMethodSpecialCustomAttributes (MethodDefinition method)
 426                 {
 427                         if (!method.HasCustomAttributes)
 428                                 return;
 429
 430                         foreach (CustomAttribute attribute in method.CustomAttributes) {
 431                                 switch (attribute.Constructor.DeclaringType.FullName) {
 432                                 case "System.Web.Services.Protocols.SoapHeaderAttribute":
 433                                         MarkSoapHeader (method, attribute);
 434                                         break;
 435                                 }
 436                         }
 437                 }
 438
 439                 void MarkXmlSchemaProvider (TypeDefinition type, CustomAttribute attribute)
 440                 {
 441                         string method_name;
 442                         if (!TryGetStringArgument (attribute, out method_name))
 443                                 return;
 444
 445                         MarkNamedMethod (type, method_name);
 446                 }
 447
 448                 static bool TryGetStringArgument (CustomAttribute attribute, out string argument)
 449                 {
 450                         argument = null;
 451
 452                         if (attribute.ConstructorArguments.Count < 1)
 453                                 return false;
 454
 455                         argument = attribute.ConstructorArguments [0].Value as string;
 456
 457                         return argument != null;
 458                 }
 459
 460                 protected void MarkNamedMethod (TypeDefinition type, string method_name)
 461                 {
 462                         if (!type.HasMethods)
 463                                 return;
 464
 465                         foreach (MethodDefinition method in type.Methods) {
 466                                 if (method.Name != method_name)
 467                                         continue;
 468
 469                                 MarkMethod (method);
 470                         }
 471                 }
 472
 473                 void MarkSoapHeader (MethodDefinition method, CustomAttribute attribute)
 474                 {
 475                         string member_name;
 476                         if (!TryGetStringArgument (attribute, out member_name))
 477                                 return;
 478
 479                         MarkNamedField (method.DeclaringType, member_name);
 480                         MarkNamedProperty (method.DeclaringType, member_name);
 481                 }
 482
 483                 void MarkNamedField (TypeDefinition type, string field_name)
 484                 {
 485                         if (!type.HasFields)
 486                                 return;
 487
 488                         foreach (FieldDefinition field in type.Fields) {
 489                                 if (field.Name != field_name)
 490                                         continue;
 491
 492                                 MarkField (field);
 493                         }
 494                 }
 495
 496                 void MarkNamedProperty (TypeDefinition type, string property_name)
 497                 {
 498                         if (!type.HasProperties)
 499                                 return;
 500
 501                         foreach (PropertyDefinition property in type.Properties) {
 502                                 if (property.Name != property_name)
 503                                         continue;
 504
 505                                 MarkMethod (property.GetMethod);
 506                                 MarkMethod (property.SetMethod);
 507                         }
 508                 }
 509
 510                 void MarkGenericParameterProvider (IGenericParameterProvider provider)
 511                 {
 512                         if (!provider.HasGenericParameters)
 513                                 return;
 514
 515                         foreach (GenericParameter parameter in provider.GenericParameters)
 516                                 MarkGenericParameter (parameter);
 517                 }
 518
 519                 void MarkGenericParameter (GenericParameter parameter)
 520                 {
 521                         MarkCustomAttributes (parameter);
 522                         foreach (TypeReference constraint in parameter.Constraints)
 523                                 MarkType (constraint);
 524                 }
 525
 526                 bool IsVirtualAndHasPreservedParent (MethodDefinition method)
 527                 {
 528                         if (!method.IsVirtual)
 529                                 return false;
 530
 531                         var base_list = Annotations.GetBaseMethods (method);
 532                         if (base_list == null)
 533                                 return false;
 534
 535                         foreach (MethodDefinition @base in base_list) {
 536                                 if (IgnoreScope (@base.DeclaringType.Scope))
 537                                         return true;
 538
 539                                 if (IsVirtualAndHasPreservedParent (@base))
 540                                         return true;
 541                         }
 542
 543                         return false;
 544                 }
 545
 546                 static MethodPredicate IsSpecialSerializationConstructorPredicate = new MethodPredicate (IsSpecialSerializationConstructor);
 547
 548                 static bool IsSpecialSerializationConstructor (MethodDefinition method)
 549                 {
 550                         if (!IsConstructor (method))
 551                                 return false;
 552
 553                         var parameters = method.Parameters;
 554                         if (parameters.Count != 2)
 555                                 return false;
 556
 557                         return parameters [0].ParameterType.Name == "SerializationInfo" &&
 558                                 parameters [1].ParameterType.Name == "StreamingContext";
 559                 }
 560
 561                 delegate bool MethodPredicate (MethodDefinition method);
 562
 563                 void MarkMethodsIf (ICollection methods, MethodPredicate predicate)
 564                 {
 565                         foreach (MethodDefinition method in methods)
 566                                 if (predicate (method))
 567                                         MarkMethod (method);
 568                 }
 569
 570                 static MethodPredicate IsDefaultConstructorPredicate = new MethodPredicate (IsDefaultConstructor);
 571
 572                 static bool IsDefaultConstructor (MethodDefinition method)
 573                 {
 574                         return IsConstructor (method) && !method.HasParameters;
 575                 }
 576
 577                 static bool IsConstructor (MethodDefinition method)
 578                 {
 579                         return method.IsConstructor && !method.IsStatic;
 580                 }
 581
 582                 protected void MarkDefaultConstructor (TypeDefinition type)
 583                 {
 584                         if ((type == null) || !type.HasMethods)
 585                                 return;
 586
 587                         MarkMethodsIf (type.Methods, IsDefaultConstructorPredicate);
 588                 }
 589
 590                 static MethodPredicate IsStaticConstructorPredicate = new MethodPredicate (IsStaticConstructor);
 591
 592                 static bool IsStaticConstructor (MethodDefinition method)
 593                 {
 594                         return method.IsConstructor && method.IsStatic;
 595                 }
 596
 597                 static bool IsSerializable (TypeDefinition td)
 598                 {
 599                         return (td.Attributes & TypeAttributes.Serializable) != 0;
 600                 }
 601
 602                 static bool IsMulticastDelegate (TypeDefinition td)
 603                 {
 604                         return td.BaseType != null && td.BaseType.FullName == "System.MulticastDelegate";
 605                 }
 606
 607                 protected TypeDefinition ResolveTypeDefinition (TypeReference type)
 608                 {
 609                         TypeDefinition td = type as TypeDefinition;
 610                         if (td == null)
 611                                 td = type.Resolve ();
 612
 613                         return td;
 614                 }
 615
 616                 protected TypeReference GetOriginalType (TypeReference type)
 617                 {
 618                         while (type is TypeSpecification) {
 619                                 GenericInstanceType git = type as GenericInstanceType;
 620                                 if (git != null)
 621                                         MarkGenericArguments (git);
 622
 623                                 var mod = type as IModifierType;
 624                                 if (mod != null)
 625                                         MarkModifierType (mod);
 626
 627                                 type = ((TypeSpecification) type).ElementType;
 628                         }
 629
 630                         return type;
 631                 }
 632
 633                 void MarkModifierType (IModifierType mod)
 634                 {
 635                         MarkType (mod.ModifierType);
 636                 }
 637
 638                 void MarkGenericArguments (IGenericInstance instance)
 639                 {
 640                         foreach (TypeReference argument in instance.GenericArguments)
 641                                 MarkType (argument);
 642
 643                         MarkGenericArgumentConstructors (instance);
 644                 }
 645
 646                 void MarkGenericArgumentConstructors (IGenericInstance instance)
 647                 {
 648                         var arguments = instance.GenericArguments;
 649
 650                         var generic_element = GetGenericProviderFromInstance (instance);
 651                         if (generic_element == null)
 652                                 return;
 653
 654                         var parameters = generic_element.GenericParameters;
 655
 656                         if (arguments.Count != parameters.Count)
 657                                 return;
 658
 659                         for (int i = 0; i < arguments.Count; i++) {
 660                                 var argument = arguments [i];
 661                                 var parameter = parameters [i];
 662
 663                                 if (!parameter.HasDefaultConstructorConstraint)
 664                                         continue;
 665
 666                                 var argument_definition = ResolveTypeDefinition (argument);
 667                                 if (argument_definition == null)
 668                                         continue;
 669
 670                                 MarkMethodsIf (argument_definition.Methods, ctor => !ctor.IsStatic && !ctor.HasParameters);
 671                         }
 672                 }
 673
 674                 IGenericParameterProvider GetGenericProviderFromInstance (IGenericInstance instance)
 675                 {
 676                         var method = instance as GenericInstanceMethod;
 677                         if (method != null)
 678                                 return ResolveMethodDefinition (method.ElementMethod);
 679
 680                         var type = instance as GenericInstanceType;
 681                         if (type != null)
 682                                 return ResolveTypeDefinition (type.ElementType);
 683
 684                         return null;
 685                 }
 686
 687                 void ApplyPreserveInfo (TypeDefinition type)
 688                 {
 689                         ApplyPreserveMethods (type);
 690
 691                         if (!Annotations.IsPreserved (type))
 692                                 return;
 693
 694                         switch (Annotations.GetPreserve (type)) {
 695                         case TypePreserve.All:
 696                                 MarkFields (type, true);
 697                                 MarkMethods (type);
 698                                 break;
 699                         case TypePreserve.Fields:
 700                                 MarkFields (type, true);
 701                                 break;
 702                         case TypePreserve.Methods:
 703                                 MarkMethods (type);
 704                                 break;
 705                         }
 706                 }
 707
 708                 void ApplyPreserveMethods (TypeDefinition type)
 709                 {
 710                         var list = Annotations.GetPreservedMethods (type);
 711                         if (list == null)
 712                                 return;
 713
 714                         MarkMethodCollection (list);
 715                 }
 716
 717                 void ApplyPreserveMethods (MethodDefinition method)
 718                 {
 719                         var list = Annotations.GetPreservedMethods (method);
 720                         if (list == null)
 721                                 return;
 722
 723                         MarkMethodCollection (list);
 724                 }
 725
 726                 protected void MarkFields (TypeDefinition type, bool includeStatic)
 727                 {
 728                         if (!type.HasFields)
 729                                 return;
 730
 731                         foreach (FieldDefinition field in type.Fields) {
 732                                 if (!includeStatic && field.IsStatic)
 733                                         continue;
 734                                 MarkField (field);
 735                         }
 736                 }
 737
 738                 protected virtual void MarkMethods (TypeDefinition type)
 739                 {
 740                         if (type.HasMethods)
 741                                 MarkMethodCollection (type.Methods);
 742                 }
 743
 744                 void MarkMethodCollection (IEnumerable methods)
 745                 {
 746                         foreach (MethodDefinition method in methods)
 747                                 MarkMethod (method);
 748                 }
 749
 750                 protected virtual MethodDefinition MarkMethod (MethodReference reference)
 751                 {
 752                         reference = GetOriginalMethod (reference);
 753
 754                         if (reference.DeclaringType is ArrayType)
 755                                 return null;
 756
 757                         if (reference.DeclaringType is GenericInstanceType)
 758                                 MarkType (reference.DeclaringType);
 759
 760 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 761 //                              return;
 762
 763                         MethodDefinition method = ResolveMethodDefinition (reference);
 764
 765                         if (method == null)
 766                                 throw new ResolutionException (reference);
 767
 768                         if (Annotations.GetAction (method) == MethodAction.Nothing)
 769                                 Annotations.SetAction (method, MethodAction.Parse);
 770
 771                         EnqueueMethod (method);
 772                         return method;
 773                 }
 774
 775                 AssemblyDefinition ResolveAssembly (IMetadataScope scope)
 776                 {
 777                         AssemblyDefinition assembly = _context.Resolve (scope);
 778                         MarkAssembly (assembly);
 779                         return assembly;
 780                 }
 781
 782                 protected MethodReference GetOriginalMethod (MethodReference method)
 783                 {
 784                         while (method is MethodSpecification) {
 785                                 GenericInstanceMethod gim = method as GenericInstanceMethod;
 786                                 if (gim != null)
 787                                         MarkGenericArguments (gim);
 788
 789                                 method = ((MethodSpecification) method).ElementMethod;
 790                         }
 791
 792                         return method;
 793                 }
 794
 795                 MethodDefinition ResolveMethodDefinition (MethodReference method)
 796                 {
 797                         MethodDefinition md = method as MethodDefinition;
 798                         if (md == null)
 799                                 md = method.Resolve ();
 800
 801                         return md;
 802                 }
 803
 804                 protected virtual void ProcessMethod (MethodDefinition method)
 805                 {
 806                         if (CheckProcessed (method))
 807                                 return;
 808
 809                         MarkType (method.DeclaringType);
 810                         MarkCustomAttributes (method);
 811
 812                         MarkGenericParameterProvider (method);
 813
 814                         if (IsPropertyMethod (method))
 815                                 MarkProperty (GetProperty (method));
 816                         else if (IsEventMethod (method))
 817                                 MarkEvent (GetEvent (method));
 818
 819                         if (method.HasParameters) {
 820                                 foreach (ParameterDefinition pd in method.Parameters) {
 821                                         MarkType (pd.ParameterType);
 822                                         MarkCustomAttributes (pd);
 823                                         MarkMarshalSpec (pd);
 824                                 }
 825                         }
 826
 827                         if (method.HasOverrides) {
 828                                 foreach (MethodReference ov in method.Overrides)
 829                                         MarkMethod (ov);
 830                         }
 831
 832                         MarkMethodSpecialCustomAttributes (method);
 833
 834                         if (method.IsVirtual)
 835                                 _virtual_methods.Add (method);
 836
 837                         MarkBaseMethods (method);
 838
 839                         MarkType (method.ReturnType);
 840                         MarkCustomAttributes (method.MethodReturnType);
 841                         MarkMarshalSpec (method.MethodReturnType);
 842
 843                         if (ShouldParseMethodBody (method))
 844                                 MarkMethodBody (method.Body);
 845
 846                         Annotations.Mark (method);
 847
 848                         ApplyPreserveMethods (method);
 849                 }
 850
 851                 void MarkBaseMethods (MethodDefinition method)
 852                 {
 853                         IList base_methods = Annotations.GetBaseMethods (method);
 854                         if (base_methods == null)
 855                                 return;
 856
 857                         foreach (MethodDefinition base_method in base_methods) {
 858                                 if (base_method.DeclaringType.IsInterface && !method.DeclaringType.IsInterface)
 859                                         continue;
 860
 861                                 MarkMethod (base_method);
 862                                 MarkBaseMethods (base_method);
 863                         }
 864                 }
 865
 866                 bool ShouldParseMethodBody (MethodDefinition method)
 867                 {
 868                         if (!method.HasBody)
 869                                 return false;
 870
 871                         AssemblyDefinition assembly = ResolveAssembly (method.DeclaringType.Scope);
 872                         return (Annotations.GetAction (method) == MethodAction.ForceParse ||
 873                                 (Annotations.GetAction (assembly) == AssemblyAction.Link && Annotations.GetAction (method) == MethodAction.Parse));
 874                 }
 875
 876                 static internal bool IsPropertyMethod (MethodDefinition md)
 877                 {
 878                         return (md.SemanticsAttributes & MethodSemanticsAttributes.Getter) != 0 ||
 879                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Setter) != 0;
 880                 }
 881
 882                 static bool IsEventMethod (MethodDefinition md)
 883                 {
 884                         return (md.SemanticsAttributes & MethodSemanticsAttributes.AddOn) != 0 ||
 885                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Fire) != 0 ||
 886                                 (md.SemanticsAttributes & MethodSemanticsAttributes.RemoveOn) != 0;
 887                 }
 888
 889                 static internal PropertyDefinition GetProperty (MethodDefinition md)
 890                 {
 891                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
 892                         foreach (PropertyDefinition prop in declaringType.Properties)
 893                                 if (prop.GetMethod == md || prop.SetMethod == md)
 894                                         return prop;
 895
 896                         return null;
 897                 }
 898
 899                 static EventDefinition GetEvent (MethodDefinition md)
 900                 {
 901                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
 902                         foreach (EventDefinition evt in declaringType.Events)
 903                                 if (evt.AddMethod == md || evt.InvokeMethod == md || evt.RemoveMethod == md)
 904                                         return evt;
 905
 906                         return null;
 907                 }
 908
 909                 protected void MarkProperty (PropertyDefinition prop)
 910                 {
 911                         MarkCustomAttributes (prop);
 912                 }
 913
 914                 protected void MarkEvent (EventDefinition evt)
 915                 {
 916                         MarkCustomAttributes (evt);
 917                         MarkMethodIfNotNull (evt.AddMethod);
 918                         MarkMethodIfNotNull (evt.InvokeMethod);
 919                         MarkMethodIfNotNull (evt.RemoveMethod);
 920                 }
 921
 922                 void MarkMethodIfNotNull (MethodReference method)
 923                 {
 924                         if (method == null)
 925                                 return;
 926
 927                         MarkMethod (method);
 928                 }
 929
 930                 protected virtual void MarkMethodBody (MethodBody body)
 931                 {
 932                         foreach (VariableDefinition var in body.Variables)
 933                                 MarkType (var.VariableType);
 934
 935                         foreach (ExceptionHandler eh in body.ExceptionHandlers)
 936                                 if (eh.HandlerType == ExceptionHandlerType.Catch)
 937                                         MarkType (eh.CatchType);
 938
 939                         foreach (Instruction instruction in body.Instructions)
 940                                 MarkInstruction (instruction);
 941                 }
 942
 943                 protected virtual void MarkInstruction (Instruction instruction)
 944                 {
 945                         switch (instruction.OpCode.OperandType) {
 946                         case OperandType.InlineField:
 947                                 MarkField ((FieldReference) instruction.Operand);
 948                                 break;
 949                         case OperandType.InlineMethod:
 950                                 MarkMethod ((MethodReference) instruction.Operand);
 951                                 break;
 952                         case OperandType.InlineTok:
 953                                 object token = instruction.Operand;
 954                                 if (token is TypeReference)
 955                                         MarkType ((TypeReference) token);
 956                                 else if (token is MethodReference)
 957                                         MarkMethod ((MethodReference) token);
 958                                 else
 959                                         MarkField ((FieldReference) token);
 960                                 break;
 961                         case OperandType.InlineType:
 962                                 MarkType ((TypeReference) instruction.Operand);
 963                                 break;
 964                         default:
 965                                 break;
 966                         }
 967                 }
 968         }
 969 }