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                                 Annotations.Push (method);
 127                                 ProcessMethod (method);
 128                                 Annotations.Pop ();
 129                         }
 130                 }
 131
 132                 bool QueueIsEmpty ()
 133                 {
 134                         return _methods.Count == 0;
 135                 }
 136
 137                 protected virtual void EnqueueMethod (MethodDefinition method)
 138                 {
 139                         _methods.Enqueue (method);
 140                 }
 141
 142                 void ProcessVirtualMethods ()
 143                 {
 144                         foreach (MethodDefinition method in _virtual_methods)
 145                                 ProcessVirtualMethod (method);
 146                 }
 147
 148                 void ProcessVirtualMethod (MethodDefinition method)
 149                 {
 150                         IList overrides = Annotations.GetOverrides (method);
 151                         if (overrides == null)
 152                                 return;
 153
 154                         foreach (MethodDefinition @override in overrides)
 155                                 ProcessOverride (@override);
 156                 }
 157
 158                 void ProcessOverride (MethodDefinition method)
 159                 {
 160                         if (!Annotations.IsMarked (method.DeclaringType))
 161                                 return;
 162
 163                         if (Annotations.IsProcessed (method))
 164                                 return;
 165
 166                         if (Annotations.IsMarked (method))
 167                                 return;
 168
 169                         MarkMethod (method);
 170                         ProcessVirtualMethod (method);
 171                 }
 172
 173                 void MarkMarshalSpec (IMarshalInfoProvider spec)
 174                 {
 175                         if (!spec.HasMarshalInfo)
 176                                 return;
 177
 178                         var marshaler = spec.MarshalInfo as CustomMarshalInfo;
 179                         if (marshaler == null)
 180                                 return;
 181
 182                         MarkType (marshaler.ManagedType);
 183                 }
 184
 185                 void MarkCustomAttributes (ICustomAttributeProvider provider)
 186                 {
 187                         if (!provider.HasCustomAttributes)
 188                                 return;
 189
 190                         foreach (CustomAttribute ca in provider.CustomAttributes)
 191                                 MarkCustomAttribute (ca);
 192                 }
 193
 194                 protected virtual void MarkCustomAttribute (CustomAttribute ca)
 195                 {
 196                         MarkMethod (ca.Constructor);
 197
 198                         MarkCustomAttributeArguments (ca);
 199
 200                         TypeReference constructor_type = ca.Constructor.DeclaringType;
 201                         TypeDefinition type = constructor_type.Resolve ();
 202                         if (type == null)
 203                                 throw new ResolutionException (constructor_type);
 204
 205                         MarkCustomAttributeProperties (ca, type);
 206                         MarkCustomAttributeFields (ca, type);
 207                 }
 208
 209                 protected void MarkSecurityDeclarations (ISecurityDeclarationProvider provider)
 210                 {
 211                         // most security declarations are removed (if linked) but user code might still have some
 212                         // and if the attribtues references types then they need to be marked too
 213                         if ((provider == null) || !provider.HasSecurityDeclarations)
 214                                 return;
 215
 216                         foreach (var sd in provider.SecurityDeclarations)
 217                                 MarkSecurityDeclaration (sd);
 218                 }
 219
 220                 protected virtual void MarkSecurityDeclaration (SecurityDeclaration sd)
 221                 {
 222                         if (!sd.HasSecurityAttributes)
 223                                 return;
 224
 225                         foreach (var sa in sd.SecurityAttributes)
 226                                 MarkSecurityAttribute (sa);
 227                 }
 228
 229                 protected virtual void MarkSecurityAttribute (SecurityAttribute sa)
 230                 {
 231                         TypeReference security_type = sa.AttributeType;
 232                         TypeDefinition type = security_type.Resolve ();
 233                         if (type == null)
 234                                 throw new ResolutionException (security_type);
 235
 236                         MarkType (security_type);
 237                         MarkSecurityAttributeProperties (sa, type);
 238                         MarkSecurityAttributeFields (sa, type);
 239                 }
 240
 241                 protected void MarkSecurityAttributeProperties (SecurityAttribute sa, TypeDefinition attribute)
 242                 {
 243                         if (!sa.HasProperties)
 244                                 return;
 245
 246                         foreach (var named_argument in sa.Properties)
 247                                 MarkCustomAttributeProperty (named_argument, attribute);
 248                 }
 249
 250                 protected void MarkSecurityAttributeFields (SecurityAttribute sa, TypeDefinition attribute)
 251                 {
 252                         if (!sa.HasFields)
 253                                 return;
 254
 255                         foreach (var named_argument in sa.Fields)
 256                                 MarkCustomAttributeField (named_argument, attribute);
 257                 }
 258
 259                 protected void MarkCustomAttributeProperties (CustomAttribute ca, TypeDefinition attribute)
 260                 {
 261                         if (!ca.HasProperties)
 262                                 return;
 263
 264                         foreach (var named_argument in ca.Properties)
 265                                 MarkCustomAttributeProperty (named_argument, attribute);
 266                 }
 267
 268                 protected void MarkCustomAttributeProperty (CustomAttributeNamedArgument namedArgument, TypeDefinition attribute)
 269                 {
 270                         PropertyDefinition property = GetProperty (attribute, namedArgument.Name);
 271                         if (property != null)
 272                                 MarkMethod (property.SetMethod);
 273
 274                         MarkIfType (namedArgument.Argument);
 275                 }
 276
 277                 PropertyDefinition GetProperty (TypeDefinition type, string propertyname)
 278                 {
 279                         while (type != null) {
 280                                 PropertyDefinition property = type.Properties.FirstOrDefault (p => p.Name == propertyname);
 281                                 if (property != null)
 282                                         return property;
 283
 284                                 type = type.BaseType != null ? ResolveTypeDefinition (type.BaseType) : null;
 285                         }
 286
 287                         return null;
 288                 }
 289
 290                 protected void MarkCustomAttributeFields (CustomAttribute ca, TypeDefinition attribute)
 291                 {
 292                         if (!ca.HasFields)
 293                                 return;
 294
 295                         foreach (var named_argument in ca.Fields)
 296                                 MarkCustomAttributeField (named_argument, attribute);
 297                 }
 298
 299                 protected void MarkCustomAttributeField (CustomAttributeNamedArgument namedArgument, TypeDefinition attribute)
 300                 {
 301                         FieldDefinition field = GetField (attribute, namedArgument.Name);
 302                         if (field != null)
 303                                 MarkField (field);
 304
 305                         MarkIfType (namedArgument.Argument);
 306                 }
 307
 308                 FieldDefinition GetField (TypeDefinition type, string fieldname)
 309                 {
 310                         while (type != null) {
 311                                 FieldDefinition field = type.Fields.FirstOrDefault (f => f.Name == fieldname);
 312                                 if (field != null)
 313                                         return field;
 314
 315                                 type = type.BaseType != null ? ResolveTypeDefinition (type.BaseType) : null;
 316                         }
 317
 318                         return null;
 319                 }
 320
 321                 void MarkCustomAttributeArguments (CustomAttribute ca)
 322                 {
 323                         if (!ca.HasConstructorArguments)
 324                                 return;
 325
 326                         foreach (var argument in ca.ConstructorArguments)
 327                                 MarkIfType (argument);
 328                 }
 329
 330                 void MarkIfType (CustomAttributeArgument argument)
 331                 {
 332                         var at = argument.Type;
 333                         if (at.IsArray) {
 334                                 var et = at.GetElementType ();
 335                                 if (et.Namespace != "System" || et.Name != "Type")
 336                                         return;
 337
 338                                 MarkType (et);
 339                                 foreach (var cac in (CustomAttributeArgument[]) argument.Value)
 340                                         MarkWithResolvedScope ((TypeReference) cac.Value);
 341                         } else if (at.Namespace == "System" && at.Name == "Type") {
 342                                 MarkType (argument.Type);
 343                                 MarkWithResolvedScope ((TypeReference) argument.Value);
 344                         }
 345                 }
 346
 347                 // custom attributes encoding means it's possible to have a scope that will point into a PCL facade
 348                 // even if we (just before saving) will resolve all type references (bug #26752)
 349                 void MarkWithResolvedScope (TypeReference type)
 350                 {
 351                         if (type == null)
 352                                 return;
 353
 354                         // a GenericInstanceType can could contains generic arguments with scope that
 355                         // needs to be updated out of the PCL facade (bug #28823)
 356                         var git = (type as GenericInstanceType);
 357                         if ((git != null) && git.HasGenericArguments) {
 358                                 foreach (var ga in git.GenericArguments)
 359                                         MarkWithResolvedScope (ga);
 360                         }
 361                         // we cannot set the Scope of a TypeSpecification but it's element type can be set
 362                         // e.g. System.String[] -> System.String
 363                         var ts = (type as TypeSpecification);
 364                         if (ts != null) {
 365                                 MarkWithResolvedScope (ts.GetElementType ());
 366                                 return;
 367                         }
 368
 369                         var td = type.Resolve ();
 370                         if (td != null)
 371                                 type.Scope = td.Scope;
 372                         MarkType (type);
 373                 }
 374
 375                 protected bool CheckProcessed (IMetadataTokenProvider provider)
 376                 {
 377                         if (Annotations.IsProcessed (provider))
 378                                 return true;
 379
 380                         Annotations.Processed (provider);
 381                         return false;
 382                 }
 383
 384                 protected void MarkAssembly (AssemblyDefinition assembly)
 385                 {
 386                         if (CheckProcessed (assembly))
 387                                 return;
 388
 389                         ProcessModule (assembly);
 390
 391                         MarkCustomAttributes (assembly);
 392                         MarkSecurityDeclarations (assembly);
 393
 394                         foreach (ModuleDefinition module in assembly.Modules)
 395                                 MarkCustomAttributes (module);
 396                 }
 397
 398                 void ProcessModule (AssemblyDefinition assembly)
 399                 {
 400                         // Pre-mark <Module> if there is any methods as they need to be executed
 401                         // at assembly load time
 402                         foreach (TypeDefinition type in assembly.MainModule.Types)
 403                         {
 404                                 if (type.Name == "<Module>" && type.HasMethods)
 405                                 {
 406                                         MarkType (type);
 407                                         break;
 408                                 }
 409                         }
 410                 }
 411
 412                 protected void MarkField (FieldReference reference)
 413                 {
 414 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 415 //                              return;
 416
 417                         if (reference.DeclaringType is GenericInstanceType)
 418                                 MarkType (reference.DeclaringType);
 419
 420                         FieldDefinition field = ResolveFieldDefinition (reference);
 421
 422                         if (field == null)
 423                                 throw new ResolutionException (reference);
 424
 425                         if (CheckProcessed (field))
 426                                 return;
 427
 428                         MarkType (field.DeclaringType);
 429                         MarkType (field.FieldType);
 430                         MarkCustomAttributes (field);
 431                         MarkMarshalSpec (field);
 432
 433                         Annotations.Mark (field);
 434                 }
 435
 436                 protected virtual bool IgnoreScope (IMetadataScope scope)
 437                 {
 438                         AssemblyDefinition assembly = ResolveAssembly (scope);
 439                         return Annotations.GetAction (assembly) != AssemblyAction.Link;
 440                 }
 441
 442                 FieldDefinition ResolveFieldDefinition (FieldReference field)
 443                 {
 444                         FieldDefinition fd = field as FieldDefinition;
 445                         if (fd == null)
 446                                 fd = field.Resolve ();
 447
 448                         return fd;
 449                 }
 450
 451                 void MarkScope (IMetadataScope scope)
 452                 {
 453                         var provider = scope as IMetadataTokenProvider;
 454                         if (provider == null)
 455                                 return;
 456
 457                         Annotations.Mark (provider);
 458                 }
 459
 460                 protected virtual void MarkSerializable (TypeDefinition type)
 461                 {
 462                         MarkDefaultConstructor (type);
 463                         MarkMethodsIf (type.Methods, IsSpecialSerializationConstructorPredicate);
 464                 }
 465
 466                 protected virtual TypeDefinition MarkType (TypeReference reference)
 467                 {
 468                         if (reference == null)
 469                                 return null;
 470
 471                         reference = GetOriginalType (reference);
 472
 473                         if (reference is GenericParameter)
 474                                 return null;
 475
 476 //                      if (IgnoreScope (reference.Scope))
 477 //                              return;
 478
 479                         TypeDefinition type = ResolveTypeDefinition (reference);
 480
 481                         if (type == null)
 482                                 throw new ResolutionException (reference);
 483
 484                         if (CheckProcessed (type))
 485                                 return null;
 486
 487                         Annotations.Push (type);
 488
 489                         MarkScope (type.Scope);
 490                         MarkType (type.BaseType);
 491                         MarkType (type.DeclaringType);
 492                         MarkCustomAttributes (type);
 493                         MarkSecurityDeclarations (type);
 494
 495                         if (IsMulticastDelegate (type)) {
 496                                 MarkMethodCollection (type.Methods);
 497                         }
 498
 499                         if (IsSerializable (type))
 500                                 MarkSerializable (type);
 501
 502                         MarkTypeSpecialCustomAttributes (type);
 503
 504                         MarkGenericParameterProvider (type);
 505
 506                         // keep fields for value-types and for classes with LayoutKind.Sequential or Explicit
 507                         if (type.IsValueType || !type.IsAutoLayout)
 508                                 MarkFields (type, type.IsEnum);
 509
 510                         if (type.HasInterfaces) {
 511                                 foreach (TypeReference iface in type.Interfaces)
 512                                         MarkType (iface);
 513                         }
 514
 515                         if (type.HasMethods) {
 516                                 MarkMethodsIf (type.Methods, IsVirtualAndHasPreservedParent);
 517                                 MarkMethodsIf (type.Methods, IsStaticConstructorPredicate);
 518                         }
 519
 520                         DoAdditionalTypeProcessing (type);
 521
 522                         Annotations.Pop ();
 523
 524                         Annotations.Mark (type);
 525
 526                         ApplyPreserveInfo (type);
 527
 528                         return type;
 529                 }
 530
 531                 // Allow subclassers to mark additional things when marking a method
 532                 protected virtual void DoAdditionalTypeProcessing (TypeDefinition method)
 533                 {
 534                 }
 535
 536                 void MarkTypeSpecialCustomAttributes (TypeDefinition type)
 537                 {
 538                         if (!type.HasCustomAttributes)
 539                                 return;
 540
 541                         foreach (CustomAttribute attribute in type.CustomAttributes) {
 542                                 switch (attribute.Constructor.DeclaringType.FullName) {
 543                                 case "System.Xml.Serialization.XmlSchemaProviderAttribute":
 544                                         MarkXmlSchemaProvider (type, attribute);
 545                                         break;
 546                                 }
 547                         }
 548                 }
 549
 550                 void MarkMethodSpecialCustomAttributes (MethodDefinition method)
 551                 {
 552                         if (!method.HasCustomAttributes)
 553                                 return;
 554
 555                         foreach (CustomAttribute attribute in method.CustomAttributes) {
 556                                 switch (attribute.Constructor.DeclaringType.FullName) {
 557                                 case "System.Web.Services.Protocols.SoapHeaderAttribute":
 558                                         MarkSoapHeader (method, attribute);
 559                                         break;
 560                                 }
 561                         }
 562                 }
 563
 564                 void MarkXmlSchemaProvider (TypeDefinition type, CustomAttribute attribute)
 565                 {
 566                         string method_name;
 567                         if (!TryGetStringArgument (attribute, out method_name))
 568                                 return;
 569
 570                         MarkNamedMethod (type, method_name);
 571                 }
 572
 573                 static bool TryGetStringArgument (CustomAttribute attribute, out string argument)
 574                 {
 575                         argument = null;
 576
 577                         if (attribute.ConstructorArguments.Count < 1)
 578                                 return false;
 579
 580                         argument = attribute.ConstructorArguments [0].Value as string;
 581
 582                         return argument != null;
 583                 }
 584
 585                 protected int MarkNamedMethod (TypeDefinition type, string method_name)
 586                 {
 587                         if (!type.HasMethods)
 588                                 return 0;
 589
 590                         int count = 0;
 591                         foreach (MethodDefinition method in type.Methods) {
 592                                 if (method.Name != method_name)
 593                                         continue;
 594
 595                                 MarkMethod (method);
 596                                 count++;
 597                         }
 598
 599                         return count;
 600                 }
 601
 602                 void MarkSoapHeader (MethodDefinition method, CustomAttribute attribute)
 603                 {
 604                         string member_name;
 605                         if (!TryGetStringArgument (attribute, out member_name))
 606                                 return;
 607
 608                         MarkNamedField (method.DeclaringType, member_name);
 609                         MarkNamedProperty (method.DeclaringType, member_name);
 610                 }
 611
 612                 void MarkNamedField (TypeDefinition type, string field_name)
 613                 {
 614                         if (!type.HasFields)
 615                                 return;
 616
 617                         foreach (FieldDefinition field in type.Fields) {
 618                                 if (field.Name != field_name)
 619                                         continue;
 620
 621                                 MarkField (field);
 622                         }
 623                 }
 624
 625                 void MarkNamedProperty (TypeDefinition type, string property_name)
 626                 {
 627                         if (!type.HasProperties)
 628                                 return;
 629
 630                         foreach (PropertyDefinition property in type.Properties) {
 631                                 if (property.Name != property_name)
 632                                         continue;
 633
 634                                 MarkMethod (property.GetMethod);
 635                                 MarkMethod (property.SetMethod);
 636                         }
 637                 }
 638
 639                 void MarkGenericParameterProvider (IGenericParameterProvider provider)
 640                 {
 641                         if (!provider.HasGenericParameters)
 642                                 return;
 643
 644                         foreach (GenericParameter parameter in provider.GenericParameters)
 645                                 MarkGenericParameter (parameter);
 646                 }
 647
 648                 void MarkGenericParameter (GenericParameter parameter)
 649                 {
 650                         MarkCustomAttributes (parameter);
 651                         foreach (TypeReference constraint in parameter.Constraints)
 652                                 MarkType (constraint);
 653                 }
 654
 655                 bool IsVirtualAndHasPreservedParent (MethodDefinition method)
 656                 {
 657                         if (!method.IsVirtual)
 658                                 return false;
 659
 660                         var base_list = Annotations.GetBaseMethods (method);
 661                         if (base_list == null)
 662                                 return false;
 663
 664                         foreach (MethodDefinition @base in base_list) {
 665                                 if (IgnoreScope (@base.DeclaringType.Scope))
 666                                         return true;
 667
 668                                 if (IsVirtualAndHasPreservedParent (@base))
 669                                         return true;
 670                         }
 671
 672                         return false;
 673                 }
 674
 675                 static MethodPredicate IsSpecialSerializationConstructorPredicate = new MethodPredicate (IsSpecialSerializationConstructor);
 676
 677                 static bool IsSpecialSerializationConstructor (MethodDefinition method)
 678                 {
 679                         if (!IsConstructor (method))
 680                                 return false;
 681
 682                         var parameters = method.Parameters;
 683                         if (parameters.Count != 2)
 684                                 return false;
 685
 686                         return parameters [0].ParameterType.Name == "SerializationInfo" &&
 687                                 parameters [1].ParameterType.Name == "StreamingContext";
 688                 }
 689
 690                 delegate bool MethodPredicate (MethodDefinition method);
 691
 692                 void MarkMethodsIf (ICollection methods, MethodPredicate predicate)
 693                 {
 694                         foreach (MethodDefinition method in methods)
 695                                 if (predicate (method))
 696                                         MarkMethod (method);
 697                 }
 698
 699                 static MethodPredicate IsDefaultConstructorPredicate = new MethodPredicate (IsDefaultConstructor);
 700
 701                 static bool IsDefaultConstructor (MethodDefinition method)
 702                 {
 703                         return IsConstructor (method) && !method.HasParameters;
 704                 }
 705
 706                 static bool IsConstructor (MethodDefinition method)
 707                 {
 708                         return method.IsConstructor && !method.IsStatic;
 709                 }
 710
 711                 protected void MarkDefaultConstructor (TypeDefinition type)
 712                 {
 713                         if ((type == null) || !type.HasMethods)
 714                                 return;
 715
 716                         MarkMethodsIf (type.Methods, IsDefaultConstructorPredicate);
 717                 }
 718
 719                 static MethodPredicate IsStaticConstructorPredicate = new MethodPredicate (IsStaticConstructor);
 720
 721                 static bool IsStaticConstructor (MethodDefinition method)
 722                 {
 723                         return method.IsConstructor && method.IsStatic;
 724                 }
 725
 726                 static bool IsSerializable (TypeDefinition td)
 727                 {
 728                         return (td.Attributes & TypeAttributes.Serializable) != 0;
 729                 }
 730
 731                 static bool IsMulticastDelegate (TypeDefinition td)
 732                 {
 733                         return td.BaseType != null && td.BaseType.FullName == "System.MulticastDelegate";
 734                 }
 735
 736                 protected TypeDefinition ResolveTypeDefinition (TypeReference type)
 737                 {
 738                         TypeDefinition td = type as TypeDefinition;
 739                         if (td == null)
 740                                 td = type.Resolve ();
 741
 742                         return td;
 743                 }
 744
 745                 protected TypeReference GetOriginalType (TypeReference type)
 746                 {
 747                         while (type is TypeSpecification) {
 748                                 GenericInstanceType git = type as GenericInstanceType;
 749                                 if (git != null)
 750                                         MarkGenericArguments (git);
 751
 752                                 var mod = type as IModifierType;
 753                                 if (mod != null)
 754                                         MarkModifierType (mod);
 755
 756                                 type = ((TypeSpecification) type).ElementType;
 757                         }
 758
 759                         return type;
 760                 }
 761
 762                 void MarkModifierType (IModifierType mod)
 763                 {
 764                         MarkType (mod.ModifierType);
 765                 }
 766
 767                 void MarkGenericArguments (IGenericInstance instance)
 768                 {
 769                         foreach (TypeReference argument in instance.GenericArguments)
 770                                 MarkType (argument);
 771
 772                         MarkGenericArgumentConstructors (instance);
 773                 }
 774
 775                 void MarkGenericArgumentConstructors (IGenericInstance instance)
 776                 {
 777                         var arguments = instance.GenericArguments;
 778
 779                         var generic_element = GetGenericProviderFromInstance (instance);
 780                         if (generic_element == null)
 781                                 return;
 782
 783                         var parameters = generic_element.GenericParameters;
 784
 785                         if (arguments.Count != parameters.Count)
 786                                 return;
 787
 788                         for (int i = 0; i < arguments.Count; i++) {
 789                                 var argument = arguments [i];
 790                                 var parameter = parameters [i];
 791
 792                                 if (!parameter.HasDefaultConstructorConstraint)
 793                                         continue;
 794
 795                                 var argument_definition = ResolveTypeDefinition (argument);
 796                                 if (argument_definition == null)
 797                                         continue;
 798
 799                                 MarkMethodsIf (argument_definition.Methods, ctor => !ctor.IsStatic && !ctor.HasParameters);
 800                         }
 801                 }
 802
 803                 IGenericParameterProvider GetGenericProviderFromInstance (IGenericInstance instance)
 804                 {
 805                         var method = instance as GenericInstanceMethod;
 806                         if (method != null)
 807                                 return ResolveMethodDefinition (method.ElementMethod);
 808
 809                         var type = instance as GenericInstanceType;
 810                         if (type != null)
 811                                 return ResolveTypeDefinition (type.ElementType);
 812
 813                         return null;
 814                 }
 815
 816                 void ApplyPreserveInfo (TypeDefinition type)
 817                 {
 818                         ApplyPreserveMethods (type);
 819
 820                         if (!Annotations.IsPreserved (type))
 821                                 return;
 822
 823                         switch (Annotations.GetPreserve (type)) {
 824                         case TypePreserve.All:
 825                                 MarkFields (type, true);
 826                                 MarkMethods (type);
 827                                 break;
 828                         case TypePreserve.Fields:
 829                                 MarkFields (type, true);
 830                                 break;
 831                         case TypePreserve.Methods:
 832                                 MarkMethods (type);
 833                                 break;
 834                         }
 835                 }
 836
 837                 void ApplyPreserveMethods (TypeDefinition type)
 838                 {
 839                         var list = Annotations.GetPreservedMethods (type);
 840                         if (list == null)
 841                                 return;
 842
 843                         MarkMethodCollection (list);
 844                 }
 845
 846                 void ApplyPreserveMethods (MethodDefinition method)
 847                 {
 848                         var list = Annotations.GetPreservedMethods (method);
 849                         if (list == null)
 850                                 return;
 851
 852                         MarkMethodCollection (list);
 853                 }
 854
 855                 protected void MarkFields (TypeDefinition type, bool includeStatic)
 856                 {
 857                         if (!type.HasFields)
 858                                 return;
 859
 860                         foreach (FieldDefinition field in type.Fields) {
 861                                 if (!includeStatic && field.IsStatic)
 862                                         continue;
 863                                 MarkField (field);
 864                         }
 865                 }
 866
 867                 protected virtual void MarkMethods (TypeDefinition type)
 868                 {
 869                         if (type.HasMethods)
 870                                 MarkMethodCollection (type.Methods);
 871                 }
 872
 873                 void MarkMethodCollection (IEnumerable methods)
 874                 {
 875                         foreach (MethodDefinition method in methods)
 876                                 MarkMethod (method);
 877                 }
 878
 879                 protected virtual MethodDefinition MarkMethod (MethodReference reference)
 880                 {
 881                         reference = GetOriginalMethod (reference);
 882
 883                         if (reference.DeclaringType is ArrayType)
 884                                 return null;
 885
 886                         Annotations.Push (reference);
 887                         if (reference.DeclaringType is GenericInstanceType)
 888                                 MarkType (reference.DeclaringType);
 889
 890 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 891 //                              return;
 892
 893                         MethodDefinition method = ResolveMethodDefinition (reference);
 894
 895                         if (method == null) {
 896                                 Annotations.Pop ();
 897                                 throw new ResolutionException (reference);
 898                         }
 899
 900                         if (Annotations.GetAction (method) == MethodAction.Nothing)
 901                                 Annotations.SetAction (method, MethodAction.Parse);
 902
 903                         EnqueueMethod (method);
 904
 905                         Annotations.Pop ();
 906
 907                         return method;
 908                 }
 909
 910                 AssemblyDefinition ResolveAssembly (IMetadataScope scope)
 911                 {
 912                         AssemblyDefinition assembly = _context.Resolve (scope);
 913                         MarkAssembly (assembly);
 914                         return assembly;
 915                 }
 916
 917                 protected MethodReference GetOriginalMethod (MethodReference method)
 918                 {
 919                         while (method is MethodSpecification) {
 920                                 GenericInstanceMethod gim = method as GenericInstanceMethod;
 921                                 if (gim != null)
 922                                         MarkGenericArguments (gim);
 923
 924                                 method = ((MethodSpecification) method).ElementMethod;
 925                         }
 926
 927                         return method;
 928                 }
 929
 930                 MethodDefinition ResolveMethodDefinition (MethodReference method)
 931                 {
 932                         MethodDefinition md = method as MethodDefinition;
 933                         if (md == null)
 934                                 md = method.Resolve ();
 935
 936                         return md;
 937                 }
 938
 939                 protected virtual void ProcessMethod (MethodDefinition method)
 940                 {
 941                         if (CheckProcessed (method))
 942                                 return;
 943
 944                         MarkType (method.DeclaringType);
 945                         MarkCustomAttributes (method);
 946                         MarkSecurityDeclarations (method);
 947
 948                         MarkGenericParameterProvider (method);
 949
 950                         if (IsPropertyMethod (method))
 951                                 MarkProperty (GetProperty (method));
 952                         else if (IsEventMethod (method))
 953                                 MarkEvent (GetEvent (method));
 954
 955                         if (method.HasParameters) {
 956                                 foreach (ParameterDefinition pd in method.Parameters) {
 957                                         MarkType (pd.ParameterType);
 958                                         MarkCustomAttributes (pd);
 959                                         MarkMarshalSpec (pd);
 960                                 }
 961                         }
 962
 963                         if (method.HasOverrides) {
 964                                 foreach (MethodReference ov in method.Overrides)
 965                                         MarkMethod (ov);
 966                         }
 967
 968                         MarkMethodSpecialCustomAttributes (method);
 969
 970                         if (method.IsVirtual)
 971                                 _virtual_methods.Add (method);
 972
 973                         MarkBaseMethods (method);
 974
 975                         MarkType (method.ReturnType);
 976                         MarkCustomAttributes (method.MethodReturnType);
 977                         MarkMarshalSpec (method.MethodReturnType);
 978
 979                         if (ShouldParseMethodBody (method))
 980                                 MarkMethodBody (method.Body);
 981
 982                         DoAdditionalMethodProcessing (method);
 983
 984                         Annotations.Mark (method);
 985
 986                         ApplyPreserveMethods (method);
 987                 }
 988
 989                 // Allow subclassers to mark additional things when marking a method
 990                 protected virtual void DoAdditionalMethodProcessing (MethodDefinition method)
 991                 {
 992                 }
 993
 994                 void MarkBaseMethods (MethodDefinition method)
 995                 {
 996                         IList base_methods = Annotations.GetBaseMethods (method);
 997                         if (base_methods == null)
 998                                 return;
 999
1000                         foreach (MethodDefinition base_method in base_methods) {
1001                                 if (base_method.DeclaringType.IsInterface && !method.DeclaringType.IsInterface)
1002                                         continue;
1003
1004                                 MarkMethod (base_method);
1005                                 MarkBaseMethods (base_method);
1006                         }
1007                 }
1008
1009                 bool ShouldParseMethodBody (MethodDefinition method)
1010                 {
1011                         if (!method.HasBody)
1012                                 return false;
1013
1014                         AssemblyDefinition assembly = ResolveAssembly (method.DeclaringType.Scope);
1015                         return (Annotations.GetAction (method) == MethodAction.ForceParse ||
1016                                 (Annotations.GetAction (assembly) == AssemblyAction.Link && Annotations.GetAction (method) == MethodAction.Parse));
1017                 }
1018
1019                 static internal bool IsPropertyMethod (MethodDefinition md)
1020                 {
1021                         return (md.SemanticsAttributes & MethodSemanticsAttributes.Getter) != 0 ||
1022                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Setter) != 0;
1023                 }
1024
1025                 static bool IsEventMethod (MethodDefinition md)
1026                 {
1027                         return (md.SemanticsAttributes & MethodSemanticsAttributes.AddOn) != 0 ||
1028                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Fire) != 0 ||
1029                                 (md.SemanticsAttributes & MethodSemanticsAttributes.RemoveOn) != 0;
1030                 }
1031
1032                 static internal PropertyDefinition GetProperty (MethodDefinition md)
1033                 {
1034                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
1035                         foreach (PropertyDefinition prop in declaringType.Properties)
1036                                 if (prop.GetMethod == md || prop.SetMethod == md)
1037                                         return prop;
1038
1039                         return null;
1040                 }
1041
1042                 static EventDefinition GetEvent (MethodDefinition md)
1043                 {
1044                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
1045                         foreach (EventDefinition evt in declaringType.Events)
1046                                 if (evt.AddMethod == md || evt.InvokeMethod == md || evt.RemoveMethod == md)
1047                                         return evt;
1048
1049                         return null;
1050                 }
1051
1052                 protected void MarkProperty (PropertyDefinition prop)
1053                 {
1054                         MarkCustomAttributes (prop);
1055                 }
1056
1057                 protected void MarkEvent (EventDefinition evt)
1058                 {
1059                         MarkCustomAttributes (evt);
1060                         MarkMethodIfNotNull (evt.AddMethod);
1061                         MarkMethodIfNotNull (evt.InvokeMethod);
1062                         MarkMethodIfNotNull (evt.RemoveMethod);
1063                 }
1064
1065                 void MarkMethodIfNotNull (MethodReference method)
1066                 {
1067                         if (method == null)
1068                                 return;
1069
1070                         MarkMethod (method);
1071                 }
1072
1073                 protected virtual void MarkMethodBody (MethodBody body)
1074                 {
1075                         foreach (VariableDefinition var in body.Variables)
1076                                 MarkType (var.VariableType);
1077
1078                         foreach (ExceptionHandler eh in body.ExceptionHandlers)
1079                                 if (eh.HandlerType == ExceptionHandlerType.Catch)
1080                                         MarkType (eh.CatchType);
1081
1082                         foreach (Instruction instruction in body.Instructions)
1083                                 MarkInstruction (instruction);
1084                 }
1085
1086                 protected virtual void MarkInstruction (Instruction instruction)
1087                 {
1088                         switch (instruction.OpCode.OperandType) {
1089                         case OperandType.InlineField:
1090                                 MarkField ((FieldReference) instruction.Operand);
1091                                 break;
1092                         case OperandType.InlineMethod:
1093                                 MarkMethod ((MethodReference) instruction.Operand);
1094                                 break;
1095                         case OperandType.InlineTok:
1096                                 object token = instruction.Operand;
1097                                 if (token is TypeReference)
1098                                         MarkType ((TypeReference) token);
1099                                 else if (token is MethodReference)
1100                                         MarkMethod ((MethodReference) token);
1101                                 else
1102                                         MarkField ((FieldReference) token);
1103                                 break;
1104                         case OperandType.InlineType:
1105                                 MarkType ((TypeReference) instruction.Operand);
1106                                 break;
1107                         default:
1108                                 break;
1109                         }
1110                 }
1111         }
1112 }