mcs/mcs/rootcontext.cs

   1 //
   2 // rootcontext.cs: keeps track of our tree representation, and assemblies loaded.
   3 //
   4 // Author: Miguel de Icaza (miguel@ximian.com)
   5 //         Ravi Pratap     (ravi@ximian.com)
   6 //
   7 // Licensed under the terms of the GNU GPL
   8 //
   9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
  10
  11 using System;
  12 using System.Collections;
  13 using System.Reflection;
  14 using System.Reflection.Emit;
  15 using System.Diagnostics;
  16
  17 namespace Mono.CSharp {
  18
  19         public class RootContext {
  20
  21                 //
  22                 // Contains the parsed tree
  23                 //
  24                 static Tree tree;
  25
  26                 //
  27                 // This hashtable contains all of the #definitions across the source code
  28                 // it is used by the ConditionalAttribute handler.
  29                 //
  30                 public static Hashtable AllDefines = new Hashtable ();
  31
  32                 //
  33                 // The list of global attributes (those that target the assembly)
  34                 //
  35                 static Hashtable global_attributes = new Hashtable ();
  36
  37                 //
  38                 // Whether we are being linked against the standard libraries.
  39                 // This is only used to tell whether `System.Object' should
  40                 // have a parent or not.
  41                 //
  42                 public static bool StdLib = true;
  43
  44                 //
  45                 // This keeps track of the order in which classes were defined
  46                 // so that we can poulate them in that order.
  47                 //
  48                 // Order is important, because we need to be able to tell by
  49                 // examining the parent's list of methods which ones are virtual
  50                 // or abstract as well as the parent names (to implement new,
  51                 // override).
  52                 //
  53                 static ArrayList type_container_resolve_order;
  54                 static ArrayList interface_resolve_order;
  55                 static ArrayList attribute_types;
  56
  57                 //
  58                 // Holds a reference to the Private Implementation Details
  59                 // class.
  60                 //
  61                 static ArrayList helper_classes;
  62
  63                 static TypeBuilder impl_details_class;
  64
  65                 public static int WarningLevel = 2;
  66
  67                 //
  68                 // If set, enable C# version 2 features
  69                 //
  70                 public static bool V2;
  71                 //
  72                 // Constructor
  73                 //
  74                 static RootContext ()
  75                 {
  76                         tree = new Tree ();
  77                         interface_resolve_order = new ArrayList ();
  78                         type_container_resolve_order = new ArrayList ();
  79                 }
  80
  81                 static public Tree Tree {
  82                         get {
  83                                 return tree;
  84                         }
  85                 }
  86
  87                 static public string MainClass;
  88
  89                 public static void RegisterOrder (Interface iface)
  90                 {
  91                         interface_resolve_order.Add (iface);
  92                 }
  93
  94                 public static void RegisterOrder (TypeContainer tc)
  95                 {
  96                         type_container_resolve_order.Add (tc);
  97                 }
  98
  99                 public static void RegisterAttribute (TypeContainer tc)
 100                 {
 101                         if (attribute_types == null)
 102                                 attribute_types = new ArrayList ();
 103
 104                         attribute_types.Add (tc);
 105                 }
 106
 107                 //
 108                 // The default compiler checked state
 109                 //
 110                 static public bool Checked = false;
 111
 112                 //
 113                 // Whether to allow Unsafe code
 114                 //
 115                 static public bool Unsafe = false;
 116
 117                 static string MakeFQN (string nsn, string name)
 118                 {
 119                         if (nsn == "")
 120                                 return name;
 121                         return String.Concat (nsn, ".", name);
 122                 }
 123
 124                 // <remarks>
 125                 //   This function is used to resolve the hierarchy tree.
 126                 //   It processes interfaces, structs and classes in that order.
 127                 //
 128                 //   It creates the TypeBuilder's as it processes the user defined
 129                 //   types.
 130                 // </remarks>
 131                 static public void ResolveTree ()
 132                 {
 133                         //
 134                         // Process the attribute types separately and before anything else
 135                         //
 136                         if (attribute_types != null)
 137                                 foreach (TypeContainer tc in attribute_types)
 138                                         tc.DefineType ();
 139
 140                         //
 141                         // Interfaces are processed next, as classes and
 142                         // structs might inherit from an object or implement
 143                         // a set of interfaces, we need to be able to tell
 144                         // them appart by just using the TypeManager.
 145                         //
 146                         TypeContainer root = Tree.Types;
 147
 148                         ArrayList ifaces = root.Interfaces;
 149                         if (ifaces != null){
 150                                 foreach (Interface i in ifaces)
 151                                         i.DefineType ();
 152                         }
 153
 154                         foreach (TypeContainer tc in root.Types)
 155                                 tc.DefineType ();
 156
 157                         if (root.Delegates != null)
 158                                 foreach (Delegate d in root.Delegates)
 159                                         d.DefineType ();
 160
 161                         if (root.Enums != null)
 162                                 foreach (Enum e in root.Enums)
 163                                         e.DefineType ();
 164                 }
 165
 166                 static void Error_TypeConflict (string name, Location loc)
 167                 {
 168                         Report.Error (
 169                                 520, loc, "`" + name + "' conflicts with a predefined type");
 170                 }
 171
 172                 static void Error_TypeConflict (string name)
 173                 {
 174                         Report.Error (
 175                                 520, "`" + name + "' conflicts with a predefined type");
 176                 }
 177
 178                 //
 179                 // Resolves a single class during the corlib bootstrap process
 180                 //
 181                 static TypeBuilder BootstrapCorlib_ResolveClass (TypeContainer root, string name)
 182                 {
 183                         object o = root.GetDefinition (name);
 184                         if (o == null){
 185                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 186                                 return null;
 187                         }
 188
 189                         if (!(o is Class)){
 190                                 if (o is DeclSpace){
 191                                         DeclSpace d = (DeclSpace) o;
 192
 193                                         Error_TypeConflict (name, d.Location);
 194                                 } else
 195                                         Error_TypeConflict (name);
 196
 197                                 return null;
 198                         }
 199
 200                         return ((DeclSpace) o).DefineType ();
 201                 }
 202
 203                 //
 204                 // Resolves a struct during the corlib bootstrap process
 205                 //
 206                 static void BootstrapCorlib_ResolveStruct (TypeContainer root, string name)
 207                 {
 208                         object o = root.GetDefinition (name);
 209                         if (o == null){
 210                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 211                                 return;
 212                         }
 213
 214                         if (!(o is Struct)){
 215                                 if (o is DeclSpace){
 216                                         DeclSpace d = (DeclSpace) o;
 217
 218                                         Error_TypeConflict (name, d.Location);
 219                                 } else
 220                                         Error_TypeConflict (name);
 221
 222                                 return;
 223                         }
 224
 225                         ((DeclSpace) o).DefineType ();
 226                 }
 227
 228                 //
 229                 // Resolves a struct during the corlib bootstrap process
 230                 //
 231                 static void BootstrapCorlib_ResolveInterface (TypeContainer root, string name)
 232                 {
 233                         object o = root.GetDefinition (name);
 234                         if (o == null){
 235                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 236                                 return;
 237                         }
 238
 239                         if (!(o is Interface)){
 240                                 if (o is DeclSpace){
 241                                         DeclSpace d = (DeclSpace) o;
 242
 243                                         Error_TypeConflict (name, d.Location);
 244                                 } else
 245                                         Error_TypeConflict (name);
 246
 247                                 return;
 248                         }
 249
 250                         ((DeclSpace) o).DefineType ();
 251                 }
 252
 253                 //
 254                 // Resolves a delegate during the corlib bootstrap process
 255                 //
 256                 static void BootstrapCorlib_ResolveDelegate (TypeContainer root, string name)
 257                 {
 258                         object o = root.GetDefinition (name);
 259                         if (o == null){
 260                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 261                                 Environment.Exit (0);
 262                         }
 263
 264                         if (!(o is Delegate)){
 265                                 Error_TypeConflict (name);
 266                                 return;
 267                         }
 268
 269                         ((DeclSpace) o).DefineType ();
 270                 }
 271
 272
 273                 /// <summary>
 274                 ///    Resolves the core types in the compiler when compiling with --nostdlib
 275                 /// </summary>
 276                 static public void ResolveCore ()
 277                 {
 278                         TypeContainer root = Tree.Types;
 279
 280                         TypeManager.object_type = BootstrapCorlib_ResolveClass (root, "System.Object");
 281                         TypeManager.value_type = BootstrapCorlib_ResolveClass (root, "System.ValueType");
 282                         TypeManager.attribute_type = BootstrapCorlib_ResolveClass (root, "System.Attribute");
 283
 284                         string [] interfaces_first_stage = {
 285                                 "System.IComparable", "System.ICloneable",
 286                                 "System.IConvertible",
 287
 288                                 "System.Collections.IEnumerable",
 289                                 "System.Collections.ICollection",
 290                                 "System.Collections.IEnumerator",
 291                                 "System.Collections.IList",
 292                                 "System.IAsyncResult",
 293                                 "System.IDisposable",
 294
 295                                 "System.Runtime.Serialization.ISerializable",
 296
 297                                 "System.Reflection.IReflect",
 298                                 "System.Reflection.ICustomAttributeProvider"
 299                         };
 300
 301                         foreach (string iname in interfaces_first_stage)
 302                                 BootstrapCorlib_ResolveInterface (root, iname);
 303
 304                         //
 305                         // These are the base value types
 306                         //
 307                         string [] structs_first_stage = {
 308                                 "System.Byte",    "System.SByte",
 309                                 "System.Int16",   "System.UInt16",
 310                                 "System.Int32",   "System.UInt32",
 311                                 "System.Int64",   "System.UInt64",
 312                         };
 313
 314                         foreach (string cname in structs_first_stage)
 315                                 BootstrapCorlib_ResolveStruct (root, cname);
 316
 317                         //
 318                         // Now, we can load the enumerations, after this point,
 319                         // we can use enums.
 320                         //
 321                         TypeManager.InitEnumUnderlyingTypes ();
 322
 323                         string [] structs_second_stage = {
 324                                 "System.Single",  "System.Double",
 325                                 "System.Char",    "System.Boolean",
 326                                 "System.Decimal", "System.Void",
 327                                 "System.RuntimeFieldHandle",
 328                                 "System.RuntimeTypeHandle",
 329                                 "System.IntPtr"
 330                         };
 331
 332                         foreach (string cname in structs_second_stage)
 333                                 BootstrapCorlib_ResolveStruct (root, cname);
 334
 335                         //
 336                         // These are classes that depends on the core interfaces
 337                         //
 338                         string [] classes_second_stage = {
 339                                 "System.Reflection.MemberInfo",
 340                                 "System.Type",
 341                                 "System.Exception",
 342
 343                                 //
 344                                 // These are not really important in the order, but they
 345                                 // are used by the compiler later on (typemanager/CoreLookupType-d)
 346                                 //
 347                                 "System.Runtime.CompilerServices.RuntimeHelpers",
 348                                 "System.Reflection.DefaultMemberAttribute",
 349                                 "System.Threading.Monitor",
 350
 351                                 "System.AttributeUsageAttribute",
 352                                 "System.Runtime.InteropServices.DllImportAttribute",
 353                                 "System.Runtime.CompilerServices.MethodImplAttribute",
 354                                 "System.Runtime.InteropServices.MarshalAsAttribute",
 355                                 "System.Diagnostics.ConditionalAttribute",
 356                                 "System.ObsoleteAttribute",
 357                                 "System.ParamArrayAttribute",
 358                                 "System.Security.UnverifiableCodeAttribute",
 359                                 "System.Runtime.CompilerServices.IndexerNameAttribute",
 360                                 "System.Runtime.InteropServices.InAttribute",
 361                                 "System.InvalidOperationException"
 362
 363                         };
 364
 365                         // We must store them here before calling BootstrapCorlib_ResolveDelegate.
 366                         TypeManager.string_type = BootstrapCorlib_ResolveClass (root, "System.String");
 367                         TypeManager.enum_type = BootstrapCorlib_ResolveClass (root, "System.Enum");
 368                         TypeManager.array_type = BootstrapCorlib_ResolveClass (root, "System.Array");
 369                         TypeManager.multicast_delegate_type = BootstrapCorlib_ResolveClass (root, "System.MulticastDelegate");
 370                         TypeManager.delegate_type = BootstrapCorlib_ResolveClass (root, "System.Delegate");
 371
 372                         foreach (string cname in classes_second_stage)
 373                                 BootstrapCorlib_ResolveClass (root, cname);
 374
 375                         BootstrapCorlib_ResolveDelegate (root, "System.AsyncCallback");
 376                 }
 377
 378                 // <summary>
 379                 //   Closes all open types
 380                 // </summary>
 381                 //
 382                 // <remarks>
 383                 //   We usually use TypeBuilder types.  When we are done
 384                 //   creating the type (which will happen after we have added
 385                 //   methods, fields, etc) we need to "Define" them before we
 386                 //   can save the Assembly
 387                 // </remarks>
 388                 static public void CloseTypes ()
 389                 {
 390                         TypeContainer root = Tree.Types;
 391
 392                         if (root.Enums != null)
 393                                 foreach (Enum en in root.Enums)
 394                                         en.CloseType ();
 395
 396                         if (attribute_types != null)
 397                                 foreach (TypeContainer tc in attribute_types)
 398                                         tc.CloseType ();
 399
 400                         foreach (Interface iface in interface_resolve_order)
 401                                 iface.CloseType ();
 402
 403                         //
 404                         // We do this in two passes, first we close the structs,
 405                         // then the classes, because it seems the code needs it this
 406                         // way.  If this is really what is going on, we should probably
 407                         // make sure that we define the structs in order as well.
 408                         //
 409                         foreach (TypeContainer tc in type_container_resolve_order){
 410                                 if (tc is Struct && tc.Parent == tree.Types){
 411                                         tc.CloseType ();
 412                                 }
 413                         }
 414
 415                         foreach (TypeContainer tc in type_container_resolve_order){
 416                                 if (!(tc is Struct && tc.Parent == tree.Types))
 417                                         tc.CloseType ();
 418                         }
 419
 420                         if (root.Delegates != null)
 421                                 foreach (Delegate d in root.Delegates)
 422                                         d.CloseType ();
 423
 424
 425                         //
 426                         // If we have a <PrivateImplementationDetails> class, close it
 427                         //
 428                         if (helper_classes != null){
 429                                 foreach (TypeBuilder type_builder in helper_classes)
 430                                         type_builder.CreateType ();
 431                         }
 432                 }
 433
 434                 /// <summary>
 435                 ///   Used to register classes that need to be closed after all the
 436                 ///   user defined classes
 437                 /// </summary>
 438                 public static void RegisterHelperClass (TypeBuilder helper_class)
 439                 {
 440                         if (helper_classes == null)
 441                                 helper_classes = new ArrayList ();
 442                         helper_classes.Add (helper_class);
 443                 }
 444
 445                 //
 446                 // This idea is from Felix Arrese-Igor
 447                 //
 448                 // Returns : the implicit parent of a composite namespace string
 449                 //   eg. Implicit parent of A.B is A
 450                 //
 451                 static public string ImplicitParent (string ns)
 452                 {
 453                         int i = ns.LastIndexOf ('.');
 454                         if (i < 0)
 455                                 return null;
 456
 457                         return ns.Substring (0, i);
 458                 }
 459
 460                 static Type NamespaceLookup (DeclSpace ds, string name, Location loc)
 461                 {
 462                         //
 463                         // Try in the current namespace and all its implicit parents
 464                         //
 465                         for (NamespaceEntry ns = ds.NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
 466                                 object result = ns.Lookup (ds, name, loc);
 467                                 if (result == null)
 468                                         continue;
 469
 470                                 if (result is Type)
 471                                         return (Type) result;
 472
 473                                 return null;
 474                         }
 475
 476                         return null;
 477                 }
 478
 479                 //
 480                 // Public function used to locate types, this can only
 481                 // be used after the ResolveTree function has been invoked.
 482                 //
 483                 // Returns: Type or null if they type can not be found.
 484                 //
 485                 // Come to think of it, this should be a DeclSpace
 486                 //
 487                 static public Type LookupType (DeclSpace ds, string name, bool silent, Location loc)
 488                 {
 489                         Type t;
 490
 491                         if (ds.Cache.Contains (name)){
 492                                 t = (Type) ds.Cache [name];
 493                                 if (t != null)
 494                                         return t;
 495                         } else {
 496                                 //
 497                                 // For the case the type we are looking for is nested within this one
 498                                 // or is in any base class
 499                                 //
 500                                 DeclSpace containing_ds = ds;
 501                                 while (containing_ds != null){
 502                                         Type current_type = containing_ds.TypeBuilder;
 503
 504                                         while (current_type != null) {
 505                                                 //
 506                                                 // nested class
 507                                                 //
 508                                                 t = TypeManager.LookupType (current_type.FullName + "." + name);
 509                                                 if (t != null){
 510                                                         ds.Cache [name] = t;
 511                                                         return t;
 512                                                 }
 513
 514                                                 current_type = current_type.BaseType;
 515                                         }
 516
 517                                         containing_ds = containing_ds.Parent;
 518                                 }
 519
 520                                 t = NamespaceLookup (ds, name, loc);
 521                                 if (t != null){
 522                                         ds.Cache [name] = t;
 523                                         return t;
 524                                 }
 525                         }
 526
 527                         if (!silent)
 528                                 Report.Error (246, loc, "Cannot find type `"+name+"'");
 529
 530                         return null;
 531                 }
 532
 533                 // <summary>
 534                 //   This is the silent version of LookupType, you can use this
 535                 //   to `probe' for a type
 536                 // </summary>
 537                 static public Type LookupType (TypeContainer tc, string name, Location loc)
 538                 {
 539                         return LookupType (tc, name, true, loc);
 540                 }
 541
 542                 static public bool IsNamespace (string name)
 543                 {
 544                         Namespace ns;
 545
 546                         if (tree.Namespaces != null){
 547                                 ns = (Namespace) tree.Namespaces [name];
 548
 549                                 if (ns != null)
 550                                         return true;
 551                         }
 552
 553                         return false;
 554                 }
 555
 556                 static void Report1530 (Location loc)
 557                 {
 558                         Report.Error (1530, loc, "Keyword new not allowed for namespace elements");
 559                 }
 560
 561                 static public void PopulateCoreType (TypeContainer root, string name)
 562                 {
 563                         DeclSpace ds = (DeclSpace) root.GetDefinition (name);
 564
 565                         ds.DefineMembers (root);
 566                         ds.Define (root);
 567                 }
 568
 569                 static public void BootCorlib_PopulateCoreTypes ()
 570                 {
 571                         TypeContainer root = tree.Types;
 572
 573                         PopulateCoreType (root, "System.Object");
 574                         PopulateCoreType (root, "System.ValueType");
 575                         PopulateCoreType (root, "System.Attribute");
 576                 }
 577
 578                 // <summary>
 579                 //   Populates the structs and classes with fields and methods
 580                 // </summary>
 581                 //
 582                 // This is invoked after all interfaces, structs and classes
 583                 // have been defined through `ResolveTree'
 584                 static public void PopulateTypes ()
 585                 {
 586                         TypeContainer root = Tree.Types;
 587
 588                         if (attribute_types != null)
 589                                 foreach (TypeContainer tc in attribute_types)
 590                                         tc.DefineMembers (root);
 591
 592                         if (interface_resolve_order != null){
 593                                 foreach (Interface iface in interface_resolve_order)
 594                                         if ((iface.ModFlags & Modifiers.NEW) == 0)
 595                                                 iface.DefineMembers (root);
 596                                         else
 597                                                 Report1530 (iface.Location);
 598                         }
 599
 600
 601                         if (type_container_resolve_order != null){
 602                                 if (RootContext.StdLib){
 603                                         foreach (TypeContainer tc in type_container_resolve_order)
 604                                                 tc.DefineMembers (root);
 605                                 } else {
 606                                         foreach (TypeContainer tc in type_container_resolve_order) {
 607                                                 // When compiling corlib, these types have already been
 608                                                 // populated from BootCorlib_PopulateCoreTypes ().
 609                                                 if (((tc.Name == "System.Object") ||
 610                                                      (tc.Name == "System.Attribute") ||
 611                                                      (tc.Name == "System.ValueType")))
 612                                                 continue;
 613
 614                                                 tc.DefineMembers (root);
 615                                         }
 616                                 }
 617                         }
 618
 619                         ArrayList delegates = root.Delegates;
 620                         if (delegates != null){
 621                                 foreach (Delegate d in delegates)
 622                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 623                                                 d.DefineMembers (root);
 624                                         else
 625                                                 Report1530 (d.Location);
 626                         }
 627
 628                         ArrayList enums = root.Enums;
 629                         if (enums != null){
 630                                 foreach (Enum en in enums)
 631                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 632                                                 en.DefineMembers (root);
 633                                         else
 634                                                 Report1530 (en.Location);
 635                         }
 636                 }
 637
 638                 //
 639                 // A generic hook delegate
 640                 //
 641                 public delegate void Hook ();
 642
 643                 //
 644                 // A hook invoked when the code has been generated.
 645                 //
 646                 public static event Hook EmitCodeHook;
 647
 648                 //
 649                 // DefineTypes is used to fill in the members of each type.
 650                 //
 651                 static public void DefineTypes ()
 652                 {
 653                         TypeContainer root = Tree.Types;
 654
 655                         if (attribute_types != null)
 656                                 foreach (TypeContainer tc in attribute_types)
 657                                         tc.Define (root);
 658
 659                         if (interface_resolve_order != null){
 660                                 foreach (Interface iface in interface_resolve_order)
 661                                         if ((iface.ModFlags & Modifiers.NEW) == 0)
 662                                                 iface.Define (root);
 663                         }
 664
 665
 666                         if (type_container_resolve_order != null){
 667                                 foreach (TypeContainer tc in type_container_resolve_order) {
 668                                         // When compiling corlib, these types have already been
 669                                         // populated from BootCorlib_PopulateCoreTypes ().
 670                                         if (!RootContext.StdLib &&
 671                                             ((tc.Name == "System.Object") ||
 672                                              (tc.Name == "System.Attribute") ||
 673                                              (tc.Name == "System.ValueType")))
 674                                                 continue;
 675
 676                                         if ((tc.ModFlags & Modifiers.NEW) == 0)
 677                                                 tc.Define (root);
 678                                 }
 679                         }
 680
 681                         ArrayList delegates = root.Delegates;
 682                         if (delegates != null){
 683                                 foreach (Delegate d in delegates)
 684                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 685                                                 d.Define (root);
 686                         }
 687
 688                         ArrayList enums = root.Enums;
 689                         if (enums != null){
 690                                 foreach (Enum en in enums)
 691                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 692                                                 en.Define (root);
 693                         }
 694                 }
 695
 696                 static public void EmitCode ()
 697                 {
 698                         //
 699                         // Because of the strange way in which we do things, global
 700                         // attributes must be processed first.
 701                         //
 702                         if (global_attributes.Count > 0){
 703                                 AssemblyBuilder ab = CodeGen.AssemblyBuilder;
 704                                 TypeContainer dummy = new TypeContainer (null, null, "", new Location (-1));
 705                                 EmitContext temp_ec = new EmitContext (
 706                                         dummy, Mono.CSharp.Location.Null, null, null, 0, false);
 707
 708                                 foreach (DictionaryEntry de in global_attributes){
 709                                         NamespaceEntry ns = (NamespaceEntry) de.Key;
 710                                         Attributes attrs = (Attributes) de.Value;
 711
 712                                         dummy.NamespaceEntry = ns;
 713                                         Attribute.ApplyAttributes (temp_ec, ab, ab, attrs);
 714                                 }
 715                         }
 716
 717                         if (attribute_types != null)
 718                                 foreach (TypeContainer tc in attribute_types)
 719                                         tc.Emit ();
 720
 721                         if (interface_resolve_order != null){
 722                                 foreach (Interface iface in interface_resolve_order)
 723                                         iface.Emit (Tree.Types);
 724                         }
 725
 726                         if (type_container_resolve_order != null) {
 727                                 foreach (TypeContainer tc in type_container_resolve_order)
 728                                         tc.EmitConstants ();
 729
 730                                 foreach (TypeContainer tc in type_container_resolve_order)
 731                                         tc.Emit ();
 732                         }
 733
 734                         //
 735                         // Run any hooks after all the types have been defined.
 736                         // This is used to create nested auxiliary classes for example
 737                         //
 738
 739                         if (EmitCodeHook != null)
 740                                 EmitCodeHook ();
 741
 742
 743                         if (Unsafe) {
 744                                 if (TypeManager.unverifiable_code_ctor == null) {
 745                                         Console.WriteLine ("Internal error ! Cannot set unverifiable code attribute.");
 746                                         return;
 747                                 }
 748
 749                                 CustomAttributeBuilder cb = new CustomAttributeBuilder (TypeManager.unverifiable_code_ctor,
 750                                                                                         new object [0]);
 751                                 CodeGen.ModuleBuilder.SetCustomAttribute (cb);
 752                         }
 753                 }
 754
 755                 //
 756                 // Public Field, used to track which method is the public entry
 757                 // point.
 758                 //
 759                 static public MethodInfo EntryPoint;
 760
 761                 //
 762                 // Track the location of the entry point.
 763                 //
 764                 static public Location EntryPointLocation;
 765
 766                 //
 767                 // These are used to generate unique names on the structs and fields.
 768                 //
 769                 static int field_count;
 770
 771                 //
 772                 // Makes an initialized struct, returns the field builder that
 773                 // references the data.  Thanks go to Sergey Chaban for researching
 774                 // how to do this.  And coming up with a shorter mechanism than I
 775                 // was able to figure out.
 776                 //
 777                 // This works but makes an implicit public struct $ArrayType$SIZE and
 778                 // makes the fields point to it.  We could get more control if we did
 779                 // use instead:
 780                 //
 781                 // 1. DefineNestedType on the impl_details_class with our struct.
 782                 //
 783                 // 2. Define the field on the impl_details_class
 784                 //
 785                 static public FieldBuilder MakeStaticData (byte [] data)
 786                 {
 787                         FieldBuilder fb;
 788
 789                         if (impl_details_class == null){
 790                                 impl_details_class = CodeGen.ModuleBuilder.DefineType (
 791                                         "<PrivateImplementationDetails>",
 792                                         TypeAttributes.NotPublic,
 793                                         TypeManager.object_type);
 794
 795                                 RegisterHelperClass (impl_details_class);
 796                         }
 797
 798                         fb = impl_details_class.DefineInitializedData (
 799                                 "$$field-" + (field_count++), data,
 800                                 FieldAttributes.Static | FieldAttributes.Assembly);
 801
 802                         return fb;
 803                 }
 804
 805                 //
 806                 // Adds a global attribute that was declared in `container',
 807                 // the attribute is in `attr', and it was defined at `loc'
 808                 //
 809                 static public void AddGlobalAttributeSection (TypeContainer container, AttributeSection attr)
 810                 {
 811                         NamespaceEntry ns = container.NamespaceEntry;
 812                         Attributes a = (Attributes) global_attributes [ns];
 813
 814                         if (a == null)
 815                                 global_attributes [ns] = new Attributes (attr);
 816                         else
 817                                 a.AddAttributeSection (attr);
 818                 }
 819         }
 820 }
 821
 822