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                                 return;
 361                         }
 362                         // we cannot set the Scope of a TypeSpecification but it's element type can be set
 363                         // e.g. System.String[] -> System.String
 364                         var ts = (type as TypeSpecification);
 365                         if (ts != null) {
 366                                 MarkWithResolvedScope (ts.GetElementType ());
 367                                 return;
 368                         }
 369
 370                         var td = type.Resolve ();
 371                         if (td != null)
 372                                 type.Scope = td.Scope;
 373                         MarkType (type);
 374                 }
 375
 376                 protected bool CheckProcessed (IMetadataTokenProvider provider)
 377                 {
 378                         if (Annotations.IsProcessed (provider))
 379                                 return true;
 380
 381                         Annotations.Processed (provider);
 382                         return false;
 383                 }
 384
 385                 protected void MarkAssembly (AssemblyDefinition assembly)
 386                 {
 387                         if (CheckProcessed (assembly))
 388                                 return;
 389
 390                         ProcessModule (assembly);
 391
 392                         MarkCustomAttributes (assembly);
 393                         MarkSecurityDeclarations (assembly);
 394
 395                         foreach (ModuleDefinition module in assembly.Modules)
 396                                 MarkCustomAttributes (module);
 397                 }
 398
 399                 void ProcessModule (AssemblyDefinition assembly)
 400                 {
 401                         // Pre-mark <Module> if there is any methods as they need to be executed
 402                         // at assembly load time
 403                         foreach (TypeDefinition type in assembly.MainModule.Types)
 404                         {
 405                                 if (type.Name == "<Module>" && type.HasMethods)
 406                                 {
 407                                         MarkType (type);
 408                                         break;
 409                                 }
 410                         }
 411                 }
 412
 413                 protected void MarkField (FieldReference reference)
 414                 {
 415 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 416 //                              return;
 417
 418                         if (reference.DeclaringType is GenericInstanceType)
 419                                 MarkType (reference.DeclaringType);
 420
 421                         FieldDefinition field = ResolveFieldDefinition (reference);
 422
 423                         if (field == null)
 424                                 throw new ResolutionException (reference);
 425
 426                         if (CheckProcessed (field))
 427                                 return;
 428
 429                         MarkType (field.DeclaringType);
 430                         MarkType (field.FieldType);
 431                         MarkCustomAttributes (field);
 432                         MarkMarshalSpec (field);
 433
 434                         Annotations.Mark (field);
 435                 }
 436
 437                 protected virtual bool IgnoreScope (IMetadataScope scope)
 438                 {
 439                         AssemblyDefinition assembly = ResolveAssembly (scope);
 440                         return Annotations.GetAction (assembly) != AssemblyAction.Link;
 441                 }
 442
 443                 FieldDefinition ResolveFieldDefinition (FieldReference field)
 444                 {
 445                         FieldDefinition fd = field as FieldDefinition;
 446                         if (fd == null)
 447                                 fd = field.Resolve ();
 448
 449                         return fd;
 450                 }
 451
 452                 void MarkScope (IMetadataScope scope)
 453                 {
 454                         var provider = scope as IMetadataTokenProvider;
 455                         if (provider == null)
 456                                 return;
 457
 458                         Annotations.Mark (provider);
 459                 }
 460
 461                 protected virtual void MarkSerializable (TypeDefinition type)
 462                 {
 463                         MarkDefaultConstructor (type);
 464                         MarkMethodsIf (type.Methods, IsSpecialSerializationConstructorPredicate);
 465                 }
 466
 467                 protected virtual TypeDefinition MarkType (TypeReference reference)
 468                 {
 469                         if (reference == null)
 470                                 return null;
 471
 472                         reference = GetOriginalType (reference);
 473
 474                         if (reference is GenericParameter)
 475                                 return null;
 476
 477 //                      if (IgnoreScope (reference.Scope))
 478 //                              return;
 479
 480                         TypeDefinition type = ResolveTypeDefinition (reference);
 481
 482                         if (type == null)
 483                                 throw new ResolutionException (reference);
 484
 485                         if (CheckProcessed (type))
 486                                 return null;
 487
 488                         Annotations.Push (type);
 489
 490                         MarkScope (type.Scope);
 491                         MarkType (type.BaseType);
 492                         MarkType (type.DeclaringType);
 493                         MarkCustomAttributes (type);
 494                         MarkSecurityDeclarations (type);
 495
 496                         if (IsMulticastDelegate (type)) {
 497                                 MarkMethodCollection (type.Methods);
 498                         }
 499
 500                         if (IsSerializable (type))
 501                                 MarkSerializable (type);
 502
 503                         MarkTypeSpecialCustomAttributes (type);
 504
 505                         MarkGenericParameterProvider (type);
 506
 507                         // keep fields for value-types and for classes with LayoutKind.Sequential or Explicit
 508                         if (type.IsValueType || !type.IsAutoLayout)
 509                                 MarkFields (type, type.IsEnum);
 510
 511                         if (type.HasInterfaces) {
 512                                 foreach (TypeReference iface in type.Interfaces)
 513                                         MarkType (iface);
 514                         }
 515
 516                         if (type.HasMethods) {
 517                                 MarkMethodsIf (type.Methods, IsVirtualAndHasPreservedParent);
 518                                 MarkMethodsIf (type.Methods, IsStaticConstructorPredicate);
 519                         }
 520
 521                         DoAdditionalTypeProcessing (type);
 522
 523                         Annotations.Pop ();
 524
 525                         Annotations.Mark (type);
 526
 527                         ApplyPreserveInfo (type);
 528
 529                         return type;
 530                 }
 531
 532                 // Allow subclassers to mark additional things when marking a method
 533                 protected virtual void DoAdditionalTypeProcessing (TypeDefinition method)
 534                 {
 535                 }
 536
 537                 void MarkTypeSpecialCustomAttributes (TypeDefinition type)
 538                 {
 539                         if (!type.HasCustomAttributes)
 540                                 return;
 541
 542                         foreach (CustomAttribute attribute in type.CustomAttributes) {
 543                                 switch (attribute.Constructor.DeclaringType.FullName) {
 544                                 case "System.Xml.Serialization.XmlSchemaProviderAttribute":
 545                                         MarkXmlSchemaProvider (type, attribute);
 546                                         break;
 547                                 }
 548                         }
 549                 }
 550
 551                 void MarkMethodSpecialCustomAttributes (MethodDefinition method)
 552                 {
 553                         if (!method.HasCustomAttributes)
 554                                 return;
 555
 556                         foreach (CustomAttribute attribute in method.CustomAttributes) {
 557                                 switch (attribute.Constructor.DeclaringType.FullName) {
 558                                 case "System.Web.Services.Protocols.SoapHeaderAttribute":
 559                                         MarkSoapHeader (method, attribute);
 560                                         break;
 561                                 }
 562                         }
 563                 }
 564
 565                 void MarkXmlSchemaProvider (TypeDefinition type, CustomAttribute attribute)
 566                 {
 567                         string method_name;
 568                         if (!TryGetStringArgument (attribute, out method_name))
 569                                 return;
 570
 571                         MarkNamedMethod (type, method_name);
 572                 }
 573
 574                 static bool TryGetStringArgument (CustomAttribute attribute, out string argument)
 575                 {
 576                         argument = null;
 577
 578                         if (attribute.ConstructorArguments.Count < 1)
 579                                 return false;
 580
 581                         argument = attribute.ConstructorArguments [0].Value as string;
 582
 583                         return argument != null;
 584                 }
 585
 586                 protected int MarkNamedMethod (TypeDefinition type, string method_name)
 587                 {
 588                         if (!type.HasMethods)
 589                                 return 0;
 590
 591                         int count = 0;
 592                         foreach (MethodDefinition method in type.Methods) {
 593                                 if (method.Name != method_name)
 594                                         continue;
 595
 596                                 MarkMethod (method);
 597                                 count++;
 598                         }
 599
 600                         return count;
 601                 }
 602
 603                 void MarkSoapHeader (MethodDefinition method, CustomAttribute attribute)
 604                 {
 605                         string member_name;
 606                         if (!TryGetStringArgument (attribute, out member_name))
 607                                 return;
 608
 609                         MarkNamedField (method.DeclaringType, member_name);
 610                         MarkNamedProperty (method.DeclaringType, member_name);
 611                 }
 612
 613                 void MarkNamedField (TypeDefinition type, string field_name)
 614                 {
 615                         if (!type.HasFields)
 616                                 return;
 617
 618                         foreach (FieldDefinition field in type.Fields) {
 619                                 if (field.Name != field_name)
 620                                         continue;
 621
 622                                 MarkField (field);
 623                         }
 624                 }
 625
 626                 void MarkNamedProperty (TypeDefinition type, string property_name)
 627                 {
 628                         if (!type.HasProperties)
 629                                 return;
 630
 631                         foreach (PropertyDefinition property in type.Properties) {
 632                                 if (property.Name != property_name)
 633                                         continue;
 634
 635                                 MarkMethod (property.GetMethod);
 636                                 MarkMethod (property.SetMethod);
 637                         }
 638                 }
 639
 640                 void MarkGenericParameterProvider (IGenericParameterProvider provider)
 641                 {
 642                         if (!provider.HasGenericParameters)
 643                                 return;
 644
 645                         foreach (GenericParameter parameter in provider.GenericParameters)
 646                                 MarkGenericParameter (parameter);
 647                 }
 648
 649                 void MarkGenericParameter (GenericParameter parameter)
 650                 {
 651                         MarkCustomAttributes (parameter);
 652                         foreach (TypeReference constraint in parameter.Constraints)
 653                                 MarkType (constraint);
 654                 }
 655
 656                 bool IsVirtualAndHasPreservedParent (MethodDefinition method)
 657                 {
 658                         if (!method.IsVirtual)
 659                                 return false;
 660
 661                         var base_list = Annotations.GetBaseMethods (method);
 662                         if (base_list == null)
 663                                 return false;
 664
 665                         foreach (MethodDefinition @base in base_list) {
 666                                 if (IgnoreScope (@base.DeclaringType.Scope))
 667                                         return true;
 668
 669                                 if (IsVirtualAndHasPreservedParent (@base))
 670                                         return true;
 671                         }
 672
 673                         return false;
 674                 }
 675
 676                 static MethodPredicate IsSpecialSerializationConstructorPredicate = new MethodPredicate (IsSpecialSerializationConstructor);
 677
 678                 static bool IsSpecialSerializationConstructor (MethodDefinition method)
 679                 {
 680                         if (!IsConstructor (method))
 681                                 return false;
 682
 683                         var parameters = method.Parameters;
 684                         if (parameters.Count != 2)
 685                                 return false;
 686
 687                         return parameters [0].ParameterType.Name == "SerializationInfo" &&
 688                                 parameters [1].ParameterType.Name == "StreamingContext";
 689                 }
 690
 691                 delegate bool MethodPredicate (MethodDefinition method);
 692
 693                 void MarkMethodsIf (ICollection methods, MethodPredicate predicate)
 694                 {
 695                         foreach (MethodDefinition method in methods)
 696                                 if (predicate (method))
 697                                         MarkMethod (method);
 698                 }
 699
 700                 static MethodPredicate IsDefaultConstructorPredicate = new MethodPredicate (IsDefaultConstructor);
 701
 702                 static bool IsDefaultConstructor (MethodDefinition method)
 703                 {
 704                         return IsConstructor (method) && !method.HasParameters;
 705                 }
 706
 707                 static bool IsConstructor (MethodDefinition method)
 708                 {
 709                         return method.IsConstructor && !method.IsStatic;
 710                 }
 711
 712                 protected void MarkDefaultConstructor (TypeDefinition type)
 713                 {
 714                         if ((type == null) || !type.HasMethods)
 715                                 return;
 716
 717                         MarkMethodsIf (type.Methods, IsDefaultConstructorPredicate);
 718                 }
 719
 720                 static MethodPredicate IsStaticConstructorPredicate = new MethodPredicate (IsStaticConstructor);
 721
 722                 static bool IsStaticConstructor (MethodDefinition method)
 723                 {
 724                         return method.IsConstructor && method.IsStatic;
 725                 }
 726
 727                 static bool IsSerializable (TypeDefinition td)
 728                 {
 729                         return (td.Attributes & TypeAttributes.Serializable) != 0;
 730                 }
 731
 732                 static bool IsMulticastDelegate (TypeDefinition td)
 733                 {
 734                         return td.BaseType != null && td.BaseType.FullName == "System.MulticastDelegate";
 735                 }
 736
 737                 protected TypeDefinition ResolveTypeDefinition (TypeReference type)
 738                 {
 739                         TypeDefinition td = type as TypeDefinition;
 740                         if (td == null)
 741                                 td = type.Resolve ();
 742
 743                         return td;
 744                 }
 745
 746                 protected TypeReference GetOriginalType (TypeReference type)
 747                 {
 748                         while (type is TypeSpecification) {
 749                                 GenericInstanceType git = type as GenericInstanceType;
 750                                 if (git != null)
 751                                         MarkGenericArguments (git);
 752
 753                                 var mod = type as IModifierType;
 754                                 if (mod != null)
 755                                         MarkModifierType (mod);
 756
 757                                 type = ((TypeSpecification) type).ElementType;
 758                         }
 759
 760                         return type;
 761                 }
 762
 763                 void MarkModifierType (IModifierType mod)
 764                 {
 765                         MarkType (mod.ModifierType);
 766                 }
 767
 768                 void MarkGenericArguments (IGenericInstance instance)
 769                 {
 770                         foreach (TypeReference argument in instance.GenericArguments)
 771                                 MarkType (argument);
 772
 773                         MarkGenericArgumentConstructors (instance);
 774                 }
 775
 776                 void MarkGenericArgumentConstructors (IGenericInstance instance)
 777                 {
 778                         var arguments = instance.GenericArguments;
 779
 780                         var generic_element = GetGenericProviderFromInstance (instance);
 781                         if (generic_element == null)
 782                                 return;
 783
 784                         var parameters = generic_element.GenericParameters;
 785
 786                         if (arguments.Count != parameters.Count)
 787                                 return;
 788
 789                         for (int i = 0; i < arguments.Count; i++) {
 790                                 var argument = arguments [i];
 791                                 var parameter = parameters [i];
 792
 793                                 if (!parameter.HasDefaultConstructorConstraint)
 794                                         continue;
 795
 796                                 var argument_definition = ResolveTypeDefinition (argument);
 797                                 if (argument_definition == null)
 798                                         continue;
 799
 800                                 MarkMethodsIf (argument_definition.Methods, ctor => !ctor.IsStatic && !ctor.HasParameters);
 801                         }
 802                 }
 803
 804                 IGenericParameterProvider GetGenericProviderFromInstance (IGenericInstance instance)
 805                 {
 806                         var method = instance as GenericInstanceMethod;
 807                         if (method != null)
 808                                 return ResolveMethodDefinition (method.ElementMethod);
 809
 810                         var type = instance as GenericInstanceType;
 811                         if (type != null)
 812                                 return ResolveTypeDefinition (type.ElementType);
 813
 814                         return null;
 815                 }
 816
 817                 void ApplyPreserveInfo (TypeDefinition type)
 818                 {
 819                         ApplyPreserveMethods (type);
 820
 821                         if (!Annotations.IsPreserved (type))
 822                                 return;
 823
 824                         switch (Annotations.GetPreserve (type)) {
 825                         case TypePreserve.All:
 826                                 MarkFields (type, true);
 827                                 MarkMethods (type);
 828                                 break;
 829                         case TypePreserve.Fields:
 830                                 MarkFields (type, true);
 831                                 break;
 832                         case TypePreserve.Methods:
 833                                 MarkMethods (type);
 834                                 break;
 835                         }
 836                 }
 837
 838                 void ApplyPreserveMethods (TypeDefinition type)
 839                 {
 840                         var list = Annotations.GetPreservedMethods (type);
 841                         if (list == null)
 842                                 return;
 843
 844                         MarkMethodCollection (list);
 845                 }
 846
 847                 void ApplyPreserveMethods (MethodDefinition method)
 848                 {
 849                         var list = Annotations.GetPreservedMethods (method);
 850                         if (list == null)
 851                                 return;
 852
 853                         MarkMethodCollection (list);
 854                 }
 855
 856                 protected void MarkFields (TypeDefinition type, bool includeStatic)
 857                 {
 858                         if (!type.HasFields)
 859                                 return;
 860
 861                         foreach (FieldDefinition field in type.Fields) {
 862                                 if (!includeStatic && field.IsStatic)
 863                                         continue;
 864                                 MarkField (field);
 865                         }
 866                 }
 867
 868                 protected virtual void MarkMethods (TypeDefinition type)
 869                 {
 870                         if (type.HasMethods)
 871                                 MarkMethodCollection (type.Methods);
 872                 }
 873
 874                 void MarkMethodCollection (IEnumerable methods)
 875                 {
 876                         foreach (MethodDefinition method in methods)
 877                                 MarkMethod (method);
 878                 }
 879
 880                 protected virtual MethodDefinition MarkMethod (MethodReference reference)
 881                 {
 882                         reference = GetOriginalMethod (reference);
 883
 884                         if (reference.DeclaringType is ArrayType)
 885                                 return null;
 886
 887                         Annotations.Push (reference);
 888                         if (reference.DeclaringType is GenericInstanceType)
 889                                 MarkType (reference.DeclaringType);
 890
 891 //                      if (IgnoreScope (reference.DeclaringType.Scope))
 892 //                              return;
 893
 894                         MethodDefinition method = ResolveMethodDefinition (reference);
 895
 896                         if (method == null) {
 897                                 Annotations.Pop ();
 898                                 throw new ResolutionException (reference);
 899                         }
 900
 901                         if (Annotations.GetAction (method) == MethodAction.Nothing)
 902                                 Annotations.SetAction (method, MethodAction.Parse);
 903
 904                         EnqueueMethod (method);
 905
 906                         Annotations.Pop ();
 907
 908                         return method;
 909                 }
 910
 911                 AssemblyDefinition ResolveAssembly (IMetadataScope scope)
 912                 {
 913                         AssemblyDefinition assembly = _context.Resolve (scope);
 914                         MarkAssembly (assembly);
 915                         return assembly;
 916                 }
 917
 918                 protected MethodReference GetOriginalMethod (MethodReference method)
 919                 {
 920                         while (method is MethodSpecification) {
 921                                 GenericInstanceMethod gim = method as GenericInstanceMethod;
 922                                 if (gim != null)
 923                                         MarkGenericArguments (gim);
 924
 925                                 method = ((MethodSpecification) method).ElementMethod;
 926                         }
 927
 928                         return method;
 929                 }
 930
 931                 MethodDefinition ResolveMethodDefinition (MethodReference method)
 932                 {
 933                         MethodDefinition md = method as MethodDefinition;
 934                         if (md == null)
 935                                 md = method.Resolve ();
 936
 937                         return md;
 938                 }
 939
 940                 protected virtual void ProcessMethod (MethodDefinition method)
 941                 {
 942                         if (CheckProcessed (method))
 943                                 return;
 944
 945                         MarkType (method.DeclaringType);
 946                         MarkCustomAttributes (method);
 947                         MarkSecurityDeclarations (method);
 948
 949                         MarkGenericParameterProvider (method);
 950
 951                         if (IsPropertyMethod (method))
 952                                 MarkProperty (GetProperty (method));
 953                         else if (IsEventMethod (method))
 954                                 MarkEvent (GetEvent (method));
 955
 956                         if (method.HasParameters) {
 957                                 foreach (ParameterDefinition pd in method.Parameters) {
 958                                         MarkType (pd.ParameterType);
 959                                         MarkCustomAttributes (pd);
 960                                         MarkMarshalSpec (pd);
 961                                 }
 962                         }
 963
 964                         if (method.HasOverrides) {
 965                                 foreach (MethodReference ov in method.Overrides)
 966                                         MarkMethod (ov);
 967                         }
 968
 969                         MarkMethodSpecialCustomAttributes (method);
 970
 971                         if (method.IsVirtual)
 972                                 _virtual_methods.Add (method);
 973
 974                         MarkBaseMethods (method);
 975
 976                         MarkType (method.ReturnType);
 977                         MarkCustomAttributes (method.MethodReturnType);
 978                         MarkMarshalSpec (method.MethodReturnType);
 979
 980                         if (ShouldParseMethodBody (method))
 981                                 MarkMethodBody (method.Body);
 982
 983                         DoAdditionalMethodProcessing (method);
 984
 985                         Annotations.Mark (method);
 986
 987                         ApplyPreserveMethods (method);
 988                 }
 989
 990                 // Allow subclassers to mark additional things when marking a method
 991                 protected virtual void DoAdditionalMethodProcessing (MethodDefinition method)
 992                 {
 993                 }
 994
 995                 void MarkBaseMethods (MethodDefinition method)
 996                 {
 997                         IList base_methods = Annotations.GetBaseMethods (method);
 998                         if (base_methods == null)
 999                                 return;
1000
1001                         foreach (MethodDefinition base_method in base_methods) {
1002                                 if (base_method.DeclaringType.IsInterface && !method.DeclaringType.IsInterface)
1003                                         continue;
1004
1005                                 MarkMethod (base_method);
1006                                 MarkBaseMethods (base_method);
1007                         }
1008                 }
1009
1010                 bool ShouldParseMethodBody (MethodDefinition method)
1011                 {
1012                         if (!method.HasBody)
1013                                 return false;
1014
1015                         AssemblyDefinition assembly = ResolveAssembly (method.DeclaringType.Scope);
1016                         return (Annotations.GetAction (method) == MethodAction.ForceParse ||
1017                                 (Annotations.GetAction (assembly) == AssemblyAction.Link && Annotations.GetAction (method) == MethodAction.Parse));
1018                 }
1019
1020                 static internal bool IsPropertyMethod (MethodDefinition md)
1021                 {
1022                         return (md.SemanticsAttributes & MethodSemanticsAttributes.Getter) != 0 ||
1023                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Setter) != 0;
1024                 }
1025
1026                 static bool IsEventMethod (MethodDefinition md)
1027                 {
1028                         return (md.SemanticsAttributes & MethodSemanticsAttributes.AddOn) != 0 ||
1029                                 (md.SemanticsAttributes & MethodSemanticsAttributes.Fire) != 0 ||
1030                                 (md.SemanticsAttributes & MethodSemanticsAttributes.RemoveOn) != 0;
1031                 }
1032
1033                 static internal PropertyDefinition GetProperty (MethodDefinition md)
1034                 {
1035                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
1036                         foreach (PropertyDefinition prop in declaringType.Properties)
1037                                 if (prop.GetMethod == md || prop.SetMethod == md)
1038                                         return prop;
1039
1040                         return null;
1041                 }
1042
1043                 static EventDefinition GetEvent (MethodDefinition md)
1044                 {
1045                         TypeDefinition declaringType = (TypeDefinition) md.DeclaringType;
1046                         foreach (EventDefinition evt in declaringType.Events)
1047                                 if (evt.AddMethod == md || evt.InvokeMethod == md || evt.RemoveMethod == md)
1048                                         return evt;
1049
1050                         return null;
1051                 }
1052
1053                 protected void MarkProperty (PropertyDefinition prop)
1054                 {
1055                         MarkCustomAttributes (prop);
1056                 }
1057
1058                 protected void MarkEvent (EventDefinition evt)
1059                 {
1060                         MarkCustomAttributes (evt);
1061                         MarkMethodIfNotNull (evt.AddMethod);
1062                         MarkMethodIfNotNull (evt.InvokeMethod);
1063                         MarkMethodIfNotNull (evt.RemoveMethod);
1064                 }
1065
1066                 void MarkMethodIfNotNull (MethodReference method)
1067                 {
1068                         if (method == null)
1069                                 return;
1070
1071                         MarkMethod (method);
1072                 }
1073
1074                 protected virtual void MarkMethodBody (MethodBody body)
1075                 {
1076                         foreach (VariableDefinition var in body.Variables)
1077                                 MarkType (var.VariableType);
1078
1079                         foreach (ExceptionHandler eh in body.ExceptionHandlers)
1080                                 if (eh.HandlerType == ExceptionHandlerType.Catch)
1081                                         MarkType (eh.CatchType);
1082
1083                         foreach (Instruction instruction in body.Instructions)
1084                                 MarkInstruction (instruction);
1085                 }
1086
1087                 protected virtual void MarkInstruction (Instruction instruction)
1088                 {
1089                         switch (instruction.OpCode.OperandType) {
1090                         case OperandType.InlineField:
1091                                 MarkField ((FieldReference) instruction.Operand);
1092                                 break;
1093                         case OperandType.InlineMethod:
1094                                 MarkMethod ((MethodReference) instruction.Operand);
1095                                 break;
1096                         case OperandType.InlineTok:
1097                                 object token = instruction.Operand;
1098                                 if (token is TypeReference)
1099                                         MarkType ((TypeReference) token);
1100                                 else if (token is MethodReference)
1101                                         MarkMethod ((MethodReference) token);
1102                                 else
1103                                         MarkField ((FieldReference) token);
1104                                 break;
1105                         case OperandType.InlineType:
1106                                 MarkType ((TypeReference) instruction.Operand);
1107                                 break;
1108                         default:
1109                                 break;
1110                         }
1111                 }
1112         }
1113 }