mcs/class/corlib/System.Reflection/Assembly.cs

   1 //
   2 // System.Reflection/Assembly.cs
   3 //
   4 // Author:
   5 //   Paolo Molaro (lupus@ximian.com)
   6 //
   7 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   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.Security;
  31 using System.Security.Policy;
  32 using System.Security.Permissions;
  33 using System.Runtime.Serialization;
  34 using System.Reflection.Emit;
  35 using System.IO;
  36 using System.Globalization;
  37 using System.Runtime.CompilerServices;
  38 using System.Runtime.InteropServices;
  39 using System.Collections;
  40 using System.Configuration.Assemblies;
  41
  42 using Mono.Security;
  43
  44 namespace System.Reflection {
  45
  46 #if NET_2_0
  47         [ComVisible (true)]
  48         [ComDefaultInterfaceAttribute (typeof (_Assembly))]
  49 #endif
  50         [Serializable]
  51         [ClassInterface(ClassInterfaceType.None)]
  52         public class Assembly : System.Reflection.ICustomAttributeProvider, _Assembly,
  53                 System.Security.IEvidenceFactory, System.Runtime.Serialization.ISerializable {
  54
  55                 internal class ResolveEventHolder {
  56                         public event ModuleResolveEventHandler ModuleResolve;
  57                 }
  58
  59                 // Note: changes to fields must be reflected in _MonoReflectionAssembly struct (object-internals.h)
  60                 private IntPtr _mono_assembly;
  61
  62                 private ResolveEventHolder resolve_event_holder;
  63                 private Evidence _evidence;
  64                 internal PermissionSet _minimum;        // for SecurityAction.RequestMinimum
  65                 internal PermissionSet _optional;       // for SecurityAction.RequestOptional
  66                 internal PermissionSet _refuse;         // for SecurityAction.RequestRefuse
  67                 private PermissionSet _granted;         // for the resolved assembly granted permissions
  68                 private PermissionSet _denied;          // for the resolved assembly denied permissions
  69                 private bool fromByteArray;
  70                 private string assemblyName;
  71
  72                 internal Assembly ()
  73                 {
  74                         resolve_event_holder = new ResolveEventHolder ();
  75                 }
  76
  77                 //
  78                 // We can't store the event directly in this class, since the
  79                 // compiler would silently insert the fields before _mono_assembly
  80                 //
  81                 public event ModuleResolveEventHandler ModuleResolve {
  82                         [SecurityPermission (SecurityAction.LinkDemand, ControlAppDomain = true)]
  83                         add {
  84                                 resolve_event_holder.ModuleResolve += value;
  85                         }
  86                         [SecurityPermission (SecurityAction.LinkDemand, ControlAppDomain = true)]
  87                         remove {
  88                                 resolve_event_holder.ModuleResolve -= value;
  89                         }
  90                 }
  91
  92                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  93                 private extern string get_code_base (bool escaped);
  94
  95                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  96                 private extern string get_location ();
  97
  98                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  99                 private extern string InternalImageRuntimeVersion ();
 100
 101                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 102                 private extern bool get_global_assembly_cache ();
 103
 104                 // SECURITY: this should be the only caller to icall get_code_base
 105                 private string GetCodeBase (bool escaped)
 106                 {
 107                         string cb = get_code_base (escaped);
 108                         if (SecurityManager.SecurityEnabled) {
 109                                 // we cannot divulge local file informations
 110                                 if (String.Compare ("FILE://", 0, cb, 0, 7, true, CultureInfo.InvariantCulture) == 0) {
 111                                         string file = cb.Substring (7);
 112                                         new FileIOPermission (FileIOPermissionAccess.PathDiscovery, file).Demand ();
 113                                 }
 114                         }
 115                         return cb;
 116                 }
 117
 118                 public virtual string CodeBase {
 119                         get { return GetCodeBase (false); }
 120                 }
 121
 122                 public virtual string EscapedCodeBase {
 123                         get { return GetCodeBase (true); }
 124                 }
 125
 126                 public virtual string FullName {
 127                         get {
 128                                 //
 129                                 // FIXME: This is wrong, but it gets us going
 130                                 // in the compiler for now
 131                                 //
 132                                 return ToString ();
 133                         }
 134                 }
 135
 136                 public virtual extern MethodInfo EntryPoint {
 137                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 138                         get;
 139                 }
 140
 141                 public virtual Evidence Evidence {
 142                         [SecurityPermission (SecurityAction.Demand, ControlEvidence = true)]
 143                         get { return UnprotectedGetEvidence (); }
 144                 }
 145
 146                 // note: the security runtime requires evidences but may be unable to do so...
 147                 internal Evidence UnprotectedGetEvidence ()
 148                 {
 149                         // if the host (runtime) hasn't provided it's own evidence...
 150                         if (_evidence == null) {
 151                                 // ... we will provide our own
 152                                 lock (this) {
 153                                         _evidence = Evidence.GetDefaultHostEvidence (this);
 154                                 }
 155                         }
 156                         return _evidence;
 157                 }
 158
 159                 public bool GlobalAssemblyCache {
 160                         get {
 161                                 return get_global_assembly_cache ();
 162                         }
 163                 }
 164
 165                 internal bool FromByteArray {
 166                         set { fromByteArray = true; }
 167                 }
 168
 169                 public virtual String Location {
 170                         get {
 171                                 if (fromByteArray)
 172                                         return String.Empty;
 173
 174                                 string loc = get_location ();
 175                                 if ((loc != String.Empty) && SecurityManager.SecurityEnabled) {
 176                                         // we cannot divulge local file informations
 177                                         new FileIOPermission (FileIOPermissionAccess.PathDiscovery, loc).Demand ();
 178                                 }
 179                                 return loc;
 180                         }
 181                 }
 182
 183 #if NET_1_1
 184                 [ComVisible (false)]
 185                 public virtual string ImageRuntimeVersion {
 186                         get {
 187                                 return InternalImageRuntimeVersion ();
 188                         }
 189                 }
 190 #endif
 191
 192                 [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
 193                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
 194                 {
 195                         if (info == null)
 196                                 throw new ArgumentNullException ("info");
 197
 198                         UnitySerializationHolder.GetAssemblyData (this, info, context);
 199                 }
 200
 201 #if ONLY_1_1
 202                 public new Type GetType ()
 203                 {
 204                         return base.GetType ();
 205                 }
 206 #endif
 207
 208                 public virtual bool IsDefined (Type attributeType, bool inherit)
 209                 {
 210                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 211                 }
 212
 213                 public virtual object [] GetCustomAttributes (bool inherit)
 214                 {
 215                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 216                 }
 217
 218                 public virtual object [] GetCustomAttributes (Type attributeType, bool inherit)
 219                 {
 220                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 221                 }
 222
 223                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 224                 private extern object GetFilesInternal (String name, bool getResourceModules);
 225
 226                 public virtual FileStream[] GetFiles ()
 227                 {
 228                         return GetFiles (false);
 229                 }
 230
 231                 public virtual FileStream [] GetFiles (bool getResourceModules)
 232                 {
 233                         string[] names = (string[]) GetFilesInternal (null, getResourceModules);
 234                         if (names == null)
 235                                 return new FileStream [0];
 236
 237                         FileStream[] res = new FileStream [names.Length];
 238                         for (int i = 0; i < names.Length; ++i)
 239                                 res [i] = new FileStream (names [i], FileMode.Open, FileAccess.Read);
 240                         return res;
 241                 }
 242
 243                 public virtual FileStream GetFile (String name)
 244                 {
 245                         if (name == null)
 246                                 throw new ArgumentNullException ("name");
 247                         if (name.Length == 0)
 248                                 throw new ArgumentException ("name");
 249
 250                         string filename = (string)GetFilesInternal (name, true);
 251                         if (filename != null)
 252                                 return new FileStream (filename, FileMode.Open, FileAccess.Read);
 253                         else
 254                                 return null;
 255                 }
 256
 257                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 258                 internal extern IntPtr GetManifestResourceInternal (String name, out int size, out Module module);
 259
 260                 public virtual Stream GetManifestResourceStream (String name)
 261                 {
 262                         if (name == null)
 263                                 throw new ArgumentNullException ("name");
 264                         if (name == "")
 265                                 throw new ArgumentException ("name cannot have zero length.");
 266
 267                         ManifestResourceInfo info = GetManifestResourceInfo (name);
 268                         if (info == null)
 269                                 return null;
 270
 271                         if (info.ReferencedAssembly != null)
 272                                 return info.ReferencedAssembly.GetManifestResourceStream (name);
 273                         if ((info.FileName != null) && (info.ResourceLocation == 0)) {
 274                                 if (fromByteArray)
 275 #if NET_2_0
 276                                         throw new FileNotFoundException (info.FileName);
 277 #else
 278                                         return null;
 279 #endif
 280
 281                                 string filename = Path.Combine (Path.GetDirectoryName (Location),
 282                                                                                         info.FileName);
 283                                 return new FileStream (filename, FileMode.Open, FileAccess.Read);
 284                         }
 285
 286                         int size;
 287                         Module module;
 288                         IntPtr data = GetManifestResourceInternal (name, out size, out module);
 289                         if (data == (IntPtr) 0)
 290                                 return null;
 291                         else {
 292                                 IntPtrStream stream = new IntPtrStream (data, size);
 293                                 /*
 294                                  * The returned pointer points inside metadata, so
 295                                  * we have to increase the refcount of the module, and decrease
 296                                  * it when the stream is finalized.
 297                                  */
 298                                 stream.Closed += new EventHandler (new ResourceCloseHandler (module).OnClose);
 299                                 return stream;
 300                         }
 301                 }
 302
 303                 public virtual Stream GetManifestResourceStream (Type type, String name)
 304                 {
 305                         string ns;
 306                         if (type != null)
 307                                 ns = type.Namespace;
 308                         else
 309                                 ns = null;
 310
 311                         if ((ns == null) || (ns == ""))
 312                                 return GetManifestResourceStream (name);
 313                         else
 314                                 return GetManifestResourceStream (ns + "." + name);
 315                 }
 316
 317                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 318                 private extern Type[] GetTypes (bool exportedOnly);
 319
 320                 public virtual Type[] GetTypes ()
 321                 {
 322                         return GetTypes (false);
 323                 }
 324
 325                 public virtual Type[] GetExportedTypes ()
 326                 {
 327                         return GetTypes (true);
 328                 }
 329
 330                 public virtual Type GetType (String name, Boolean throwOnError)
 331                 {
 332                         return GetType (name, throwOnError, false);
 333                 }
 334
 335                 public virtual Type GetType (String name) {
 336                         return GetType (name, false, false);
 337                 }
 338
 339                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 340                 internal extern Type InternalGetType (Module module, String name, Boolean throwOnError, Boolean ignoreCase);
 341
 342                 public Type GetType (string name, bool throwOnError, bool ignoreCase)
 343                 {
 344                         if (name == null)
 345                                 throw new ArgumentNullException (name);
 346
 347                         return InternalGetType (null, name, throwOnError, ignoreCase);
 348                 }
 349
 350                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 351                 internal extern static void InternalGetAssemblyName (string assemblyFile, AssemblyName aname);
 352
 353                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 354                 static extern void FillName (Assembly ass, AssemblyName aname);
 355
 356                 [MonoTODO ("copiedName == true is not supported")]
 357                 public virtual AssemblyName GetName (Boolean copiedName)
 358                 {
 359                         // CodeBase, which is restricted, will be copied into the AssemblyName object so...
 360                         if (SecurityManager.SecurityEnabled) {
 361                                 GetCodeBase (true); // this will ensure the Demand is made
 362                         }
 363                         return UnprotectedGetName ();
 364                 }
 365
 366                 public virtual AssemblyName GetName ()
 367                 {
 368                         return GetName (false);
 369                 }
 370
 371                 // the security runtime requires access to the assemblyname (e.g. to get the strongname)
 372                 internal virtual AssemblyName UnprotectedGetName ()
 373                 {
 374                         AssemblyName aname = new AssemblyName ();
 375                         FillName (this, aname);
 376                         return aname;
 377                 }
 378
 379                 public override string ToString ()
 380                 {
 381                         // note: ToString work without requiring CodeBase (so no checks are needed)
 382
 383                         if (assemblyName != null)
 384                                 return assemblyName;
 385
 386                         AssemblyName aname = new AssemblyName ();
 387                         FillName (this, aname);
 388                         assemblyName = aname.ToString ();
 389
 390                         return assemblyName;
 391                 }
 392
 393                 public static String CreateQualifiedName (String assemblyName, String typeName)
 394                 {
 395                         return typeName + ", " + assemblyName;
 396                 }
 397
 398                 public static Assembly GetAssembly (Type type)
 399                 {
 400                         if (type != null)
 401                                 return type.Assembly;
 402                         throw new ArgumentNullException ("type");
 403                 }
 404
 405
 406                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 407                 public static extern Assembly GetEntryAssembly();
 408
 409                 public Assembly GetSatelliteAssembly (CultureInfo culture)
 410                 {
 411                         return GetSatelliteAssembly (culture, null);
 412                 }
 413
 414                 public Assembly GetSatelliteAssembly (CultureInfo culture, Version version)
 415                 {
 416                         if (culture == null)
 417                                 throw new ArgumentException ("culture");
 418
 419                         AssemblyName aname = GetName (true);
 420                         if (version != null)
 421                                 aname.Version = version;
 422
 423                         aname.CultureInfo = culture;
 424                         aname.Name = aname.Name + ".resources";
 425                         return Load (aname);
 426                 }
 427
 428                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 429                 private extern static Assembly LoadFrom (String assemblyFile, bool refonly);
 430
 431                 public static Assembly LoadFrom (String assemblyFile)
 432                 {
 433                         return LoadFrom (assemblyFile, false);
 434                 }
 435
 436                 public static Assembly LoadFrom (String assemblyFile, Evidence securityEvidence)
 437                 {
 438                         Assembly a = LoadFrom (assemblyFile, false);
 439                         if ((a != null) && (securityEvidence != null)) {
 440                                 // merge evidence (i.e. replace defaults with provided evidences)
 441                                 a.Evidence.Merge (securityEvidence);
 442                         }
 443                         return a;
 444                 }
 445
 446 #if NET_1_1
 447
 448                 [MonoTODO("This overload is not currently implemented")]
 449                 // FIXME: What are we missing?
 450                 public static Assembly LoadFrom (String assemblyFile, Evidence securityEvidence, byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm)
 451                 {
 452                         if (assemblyFile == null)
 453                                 throw new ArgumentNullException ("assemblyFile");
 454                         if (assemblyFile == String.Empty)
 455                                 throw new ArgumentException ("Name can't be the empty string", "assemblyFile");
 456                         throw new NotImplementedException ();
 457                 }
 458
 459                 public static Assembly LoadFile (String path, Evidence securityEvidence)
 460                 {
 461                         if (path == null)
 462                                 throw new ArgumentNullException ("path");
 463                         if (path == String.Empty)
 464                                 throw new ArgumentException ("Path can't be empty", "path");
 465                         // FIXME: Make this do the right thing
 466                         return LoadFrom (path, securityEvidence);
 467                 }
 468
 469                 public static Assembly LoadFile (String path)
 470                 {
 471                         return LoadFile (path, null);
 472                 }
 473 #endif
 474
 475                 public static Assembly Load (String assemblyString)
 476                 {
 477                         return AppDomain.CurrentDomain.Load (assemblyString);
 478                 }
 479
 480                 public static Assembly Load (String assemblyString, Evidence assemblySecurity)
 481                 {
 482                         return AppDomain.CurrentDomain.Load (assemblyString, assemblySecurity);
 483                 }
 484
 485                 public static Assembly Load (AssemblyName assemblyRef)
 486                 {
 487                         return AppDomain.CurrentDomain.Load (assemblyRef);
 488                 }
 489
 490                 public static Assembly Load (AssemblyName assemblyRef, Evidence assemblySecurity)
 491                 {
 492                         return AppDomain.CurrentDomain.Load (assemblyRef, assemblySecurity);
 493                 }
 494
 495                 public static Assembly Load (Byte[] rawAssembly)
 496                 {
 497                         return AppDomain.CurrentDomain.Load (rawAssembly);
 498                 }
 499
 500                 public static Assembly Load (Byte[] rawAssembly, Byte[] rawSymbolStore)
 501                 {
 502                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore);
 503                 }
 504
 505                 public static Assembly Load (Byte[] rawAssembly, Byte[] rawSymbolStore,
 506                                              Evidence securityEvidence)
 507                 {
 508                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore, securityEvidence);
 509                 }
 510
 511 #if NET_2_0
 512                 public static Assembly ReflectionOnlyLoad (byte[] rawAssembly)
 513                 {
 514                         return AppDomain.CurrentDomain.Load (rawAssembly, null, null, true);
 515                 }
 516
 517                 public static Assembly ReflectionOnlyLoad (string assemblyName)
 518                 {
 519                         return AppDomain.CurrentDomain.Load (assemblyName, null, true);
 520                 }
 521
 522                 public static Assembly ReflectionOnlyLoadFrom (string assemblyFile)
 523                 {
 524                         if (assemblyFile == null)
 525                                 throw new ArgumentNullException ("assemblyFile");
 526
 527                         return LoadFrom (assemblyFile, true);
 528                 }
 529 #endif
 530
 531 #if NET_2_0
 532                 [Obsolete ("")]
 533 #endif
 534                 public static Assembly LoadWithPartialName (string partialName)
 535                 {
 536                         return LoadWithPartialName (partialName, null);
 537                 }
 538
 539                 [MonoTODO ("Not implemented")]
 540                 public Module LoadModule (string moduleName, byte [] rawModule)
 541                 {
 542                         throw new NotImplementedException ();
 543                 }
 544
 545                 [MonoTODO ("Not implemented")]
 546                 public Module LoadModule (string moduleName, byte [] rawModule, byte [] rawSymbolStore)
 547                 {
 548                         throw new NotImplementedException ();
 549                 }
 550
 551                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 552                 private static extern Assembly load_with_partial_name (string name, Evidence e);
 553
 554 #if NET_2_0
 555                 [Obsolete ("")]
 556 #endif
 557                 public static Assembly LoadWithPartialName (string partialName, Evidence securityEvidence)
 558                 {
 559                         return LoadWithPartialName (partialName, securityEvidence, true);
 560                 }
 561
 562                 /**
 563                  * LAMESPEC: It is possible for this method to throw exceptions IF the name supplied
 564                  * is a valid gac name and contains filesystem entry charachters at the end of the name
 565                  * ie System/// will throw an exception. However ////System will not as that is canocolized
 566                  * out of the name.
 567                  */
 568
 569                 // FIXME: LoadWithPartialName must look cache (no CAS) or read from disk (CAS)
 570                 internal static Assembly LoadWithPartialName (string partialName, Evidence securityEvidence, bool oldBehavior)
 571                 {
 572                         if (!oldBehavior)
 573                                 throw new NotImplementedException ();
 574
 575                         if (partialName == null)
 576                                 throw new NullReferenceException ();
 577
 578                         return load_with_partial_name (partialName, securityEvidence);
 579                 }
 580
 581                 public Object CreateInstance (String typeName)
 582                 {
 583                         return CreateInstance (typeName, false);
 584                 }
 585
 586                 public Object CreateInstance (String typeName, Boolean ignoreCase)
 587                 {
 588                         Type t = GetType (typeName, false, ignoreCase);
 589                         if (t == null)
 590                                 return null;
 591
 592                         try {
 593                                 return Activator.CreateInstance (t);
 594                         } catch (InvalidOperationException) {
 595                                 throw new ArgumentException ("It is illegal to invoke a method on a Type loaded via ReflectionOnly methods.");
 596                         }
 597                 }
 598
 599                 public Object CreateInstance (String typeName, Boolean ignoreCase,
 600                                               BindingFlags bindingAttr, Binder binder,
 601                                               Object[] args, CultureInfo culture,
 602                                               Object[] activationAttributes)
 603                 {
 604                         Type t = GetType (typeName, false, ignoreCase);
 605                         if (t == null)
 606                                 return null;
 607
 608                         try {
 609                                 return Activator.CreateInstance (t, bindingAttr, binder, args, culture, activationAttributes);
 610                         } catch (InvalidOperationException) {
 611                                 throw new ArgumentException ("It is illegal to invoke a method on a Type loaded via ReflectionOnly methods.");
 612                         }
 613                 }
 614
 615                 public Module[] GetLoadedModules ()
 616                 {
 617                         return GetLoadedModules (false);
 618                 }
 619
 620                 // FIXME: Currently, the two sets of modules are equal
 621                 public Module[] GetLoadedModules (bool getResourceModules)
 622                 {
 623                         return GetModules (getResourceModules);
 624                 }
 625
 626                 public Module[] GetModules ()
 627                 {
 628                         return GetModules (false);
 629                 }
 630
 631                 public Module GetModule (String name)
 632                 {
 633                         if (name == null)
 634                                 throw new ArgumentNullException ("name");
 635                         if (name == "")
 636                                 throw new ArgumentException ("Name can't be empty");
 637
 638                         Module[] modules = GetModules (true);
 639                         foreach (Module module in modules) {
 640                                 if (module.ScopeName == name)
 641                                         return module;
 642                         }
 643
 644                         return null;
 645                 }
 646
 647                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 648                 internal extern Module[] GetModulesInternal ();
 649
 650                 public Module[] GetModules (bool getResourceModules) {
 651                         Module[] modules = GetModulesInternal ();
 652
 653                         if (!getResourceModules) {
 654                                 ArrayList result = new ArrayList (modules.Length);
 655                                 foreach (Module m in modules)
 656                                         if (!m.IsResource ())
 657                                                 result.Add (m);
 658                                 return (Module[])result.ToArray (typeof (Module));
 659                         }
 660                         else
 661                                 return modules;
 662                 }
 663
 664                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 665                 internal extern string[] GetNamespaces ();
 666
 667                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 668                 public extern virtual String[] GetManifestResourceNames ();
 669
 670                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 671                 public extern static Assembly GetExecutingAssembly ();
 672
 673                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 674                 public extern static Assembly GetCallingAssembly ();
 675
 676                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 677                 public extern AssemblyName[] GetReferencedAssemblies ();
 678
 679                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 680                 private extern bool GetManifestResourceInfoInternal (String name, ManifestResourceInfo info);
 681
 682                 public virtual ManifestResourceInfo GetManifestResourceInfo (String resourceName)
 683                 {
 684                         if (resourceName == null)
 685                                 throw new ArgumentNullException ("resourceName");
 686                         if (resourceName == "")
 687                                 throw new ArgumentException ("String cannot have zero length.");
 688                         ManifestResourceInfo result = new ManifestResourceInfo ();
 689                         bool found = GetManifestResourceInfoInternal (resourceName, result);
 690                         if (found)
 691                                 return result;
 692                         else
 693                                 return null;
 694                 }
 695
 696                 private class ResourceCloseHandler {
 697
 698                         Module module;
 699
 700                         public ResourceCloseHandler (Module module) {
 701                                 this.module = module;
 702                         }
 703
 704                         public void OnClose (object sender, EventArgs e) {
 705                                 // The module dtor will take care of things
 706                                 module = null;
 707                         }
 708                 }
 709
 710                 //
 711                 // The following functions are only for the Mono Debugger.
 712                 //
 713
 714                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 715                 internal static extern int MonoDebugger_GetMethodToken (MethodBase method);
 716
 717 #if NET_2_0
 718                 [MonoTODO ("Always returns zero")]
 719                 [ComVisible (false)]
 720                 public long HostContext {
 721                         get { return 0; }
 722                 }
 723
 724                 [ComVisible (false)]
 725                 public extern Module ManifestModule {
 726                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 727                         get;
 728                 }
 729
 730                 [ComVisible (false)]
 731                 public virtual extern bool ReflectionOnly {
 732                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 733                         get;
 734                 }
 735 #endif
 736
 737                 // Code Access Security
 738
 739                 internal void Resolve ()
 740                 {
 741                         lock (this) {
 742                                 // FIXME: As we (currently) delay the resolution until the first CAS
 743                                 // Demand it's too late to evaluate the Minimum permission set as a
 744                                 // condition to load the assembly into the AppDomain
 745                                 LoadAssemblyPermissions ();
 746                                 Evidence e = new Evidence (UnprotectedGetEvidence ()); // we need a copy to add PRE
 747                                 e.AddHost (new PermissionRequestEvidence (_minimum, _optional, _refuse));
 748                                 _granted = SecurityManager.ResolvePolicy (e,
 749                                         _minimum, _optional, _refuse, out _denied);
 750                         }
 751                 }
 752
 753                 internal PermissionSet GrantedPermissionSet {
 754                         get {
 755                                 if (_granted == null) {
 756                                         if (SecurityManager.ResolvingPolicyLevel != null) {
 757                                                 if (SecurityManager.ResolvingPolicyLevel.IsFullTrustAssembly (this))
 758                                                         return DefaultPolicies.FullTrust;
 759                                                 else
 760                                                         return null; // we can't resolve during resolution
 761                                         }
 762                                         Resolve ();
 763                                 }
 764                                 return _granted;
 765                         }
 766                 }
 767
 768                 internal PermissionSet DeniedPermissionSet {
 769                         get {
 770                                 // yes we look for granted, as denied may be null
 771                                 if (_granted == null) {
 772                                         if (SecurityManager.ResolvingPolicyLevel != null) {
 773                                                 if (SecurityManager.ResolvingPolicyLevel.IsFullTrustAssembly (this))
 774                                                         return null;
 775                                                 else
 776                                                         return DefaultPolicies.FullTrust; // deny unrestricted
 777                                         }
 778                                         Resolve ();
 779                                 }
 780                                 return _denied;
 781                         }
 782                 }
 783
 784                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 785                 extern internal static bool LoadPermissions (Assembly a,
 786                         ref IntPtr minimum, ref int minLength,
 787                         ref IntPtr optional, ref int optLength,
 788                         ref IntPtr refused, ref int refLength);
 789
 790                 // Support for SecurityAction.RequestMinimum, RequestOptional and RequestRefuse
 791                 private void LoadAssemblyPermissions ()
 792                 {
 793                         IntPtr minimum = IntPtr.Zero, optional = IntPtr.Zero, refused = IntPtr.Zero;
 794                         int minLength = 0, optLength = 0, refLength = 0;
 795                         if (LoadPermissions (this, ref minimum, ref minLength, ref optional,
 796                                 ref optLength, ref refused, ref refLength)) {
 797
 798                                 // Note: no need to cache these permission sets as they will only be created once
 799                                 // at assembly resolution time.
 800                                 if (minLength > 0) {
 801                                         byte[] data = new byte [minLength];
 802                                         Marshal.Copy (minimum, data, 0, minLength);
 803                                         _minimum = SecurityManager.Decode (data);
 804                                 }
 805                                 if (optLength > 0) {
 806                                         byte[] data = new byte [optLength];
 807                                         Marshal.Copy (optional, data, 0, optLength);
 808                                         _optional = SecurityManager.Decode (data);
 809                                 }
 810                                 if (refLength > 0) {
 811                                         byte[] data = new byte [refLength];
 812                                         Marshal.Copy (refused, data, 0, refLength);
 813                                         _refuse = SecurityManager.Decode (data);
 814                                 }
 815                         }
 816                 }
 817         }
 818 }