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 // Copyright 2011 Xamarin Inc (http://www.xamarin.com).
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Security;
  32 using System.Security.Policy;
  33 using System.Security.Permissions;
  34 using System.Runtime.Serialization;
  35 using System.Reflection;
  36 using System.IO;
  37 using System.Globalization;
  38 using System.Runtime.CompilerServices;
  39 using System.Runtime.InteropServices;
  40 using System.Collections.Generic;
  41 using System.Configuration.Assemblies;
  42
  43 using Mono.Security;
  44
  45 namespace System.Reflection {
  46
  47         [ComVisible (true)]
  48         [ComDefaultInterfaceAttribute (typeof (_Assembly))]
  49         [Serializable]
  50         [ClassInterface(ClassInterfaceType.None)]
  51         [StructLayout (LayoutKind.Sequential)]
  52 #if MOBILE
  53         public partial class Assembly : ICustomAttributeProvider, _Assembly {
  54 #elif NET_4_0
  55         public abstract class Assembly : ICustomAttributeProvider, _Assembly, IEvidenceFactory, ISerializable {
  56 #else
  57         public partial class Assembly : ICustomAttributeProvider, _Assembly, IEvidenceFactory, ISerializable {
  58 #endif
  59                 internal class ResolveEventHolder {
  60                         public event ModuleResolveEventHandler ModuleResolve;
  61                 }
  62
  63                 // Note: changes to fields must be reflected in _MonoReflectionAssembly struct (object-internals.h)
  64 #pragma warning disable 649
  65                 private IntPtr _mono_assembly;
  66 #pragma warning restore 649
  67
  68                 private ResolveEventHolder resolve_event_holder;
  69 #if !MOBILE
  70                 private Evidence _evidence;
  71                 internal PermissionSet _minimum;        // for SecurityAction.RequestMinimum
  72                 internal PermissionSet _optional;       // for SecurityAction.RequestOptional
  73                 internal PermissionSet _refuse;         // for SecurityAction.RequestRefuse
  74                 private PermissionSet _granted;         // for the resolved assembly granted permissions
  75                 private PermissionSet _denied;          // for the resolved assembly denied permissions
  76 #endif
  77                 private bool fromByteArray;
  78                 private string assemblyName;
  79
  80 #if NET_4_0
  81                 protected
  82 #else
  83                 internal
  84 #endif
  85                 Assembly ()
  86                 {
  87                         resolve_event_holder = new ResolveEventHolder ();
  88                 }
  89
  90                 //
  91                 // We can't store the event directly in this class, since the
  92                 // compiler would silently insert the fields before _mono_assembly
  93                 //
  94                 public event ModuleResolveEventHandler ModuleResolve {
  95                         [SecurityPermission (SecurityAction.LinkDemand, ControlAppDomain = true)]
  96                         add {
  97                                 resolve_event_holder.ModuleResolve += value;
  98                         }
  99                         [SecurityPermission (SecurityAction.LinkDemand, ControlAppDomain = true)]
 100                         remove {
 101                                 resolve_event_holder.ModuleResolve -= value;
 102                         }
 103                 }
 104
 105                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 106                 private extern string get_code_base (bool escaped);
 107
 108                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 109                 private extern string get_fullname ();
 110
 111                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 112                 private extern string get_location ();
 113
 114                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 115                 private extern string InternalImageRuntimeVersion ();
 116
 117                 // SECURITY: this should be the only caller to icall get_code_base
 118                 private string GetCodeBase (bool escaped)
 119                 {
 120                         string cb = get_code_base (escaped);
 121 #if !NET_2_1
 122                         if (SecurityManager.SecurityEnabled) {
 123                                 // we cannot divulge local file informations
 124                                 if (String.Compare ("FILE://", 0, cb, 0, 7, true, CultureInfo.InvariantCulture) == 0) {
 125                                         string file = cb.Substring (7);
 126                                         new FileIOPermission (FileIOPermissionAccess.PathDiscovery, file).Demand ();
 127                                 }
 128                         }
 129 #endif
 130                         return cb;
 131                 }
 132
 133                 public virtual string CodeBase {
 134                         get { return GetCodeBase (false); }
 135                 }
 136
 137                 public virtual string EscapedCodeBase {
 138                         get { return GetCodeBase (true); }
 139                 }
 140
 141                 public virtual string FullName {
 142                         get {
 143                                 //
 144                                 // FIXME: This is wrong, but it gets us going
 145                                 // in the compiler for now
 146                                 //
 147                                 return ToString ();
 148                         }
 149                 }
 150
 151                 public virtual extern MethodInfo EntryPoint {
 152                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 153                         get;
 154                 }
 155
 156                 public virtual Evidence Evidence {
 157                         [SecurityPermission (SecurityAction.Demand, ControlEvidence = true)]
 158                         get { return UnprotectedGetEvidence (); }
 159                 }
 160
 161                 // note: the security runtime requires evidences but may be unable to do so...
 162                 internal Evidence UnprotectedGetEvidence ()
 163                 {
 164 #if MOBILE
 165                         return null;
 166 #else
 167                         // if the host (runtime) hasn't provided it's own evidence...
 168                         if (_evidence == null) {
 169                                 // ... we will provide our own
 170                                 lock (this) {
 171                                         _evidence = Evidence.GetDefaultHostEvidence (this);
 172                                 }
 173                         }
 174                         return _evidence;
 175 #endif
 176                 }
 177
 178                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 179                 internal extern bool get_global_assembly_cache ();
 180
 181                 internal bool FromByteArray {
 182                         set { fromByteArray = value; }
 183                 }
 184
 185                 public virtual String Location {
 186                         get {
 187                                 if (fromByteArray)
 188                                         return String.Empty;
 189
 190                                 string loc = get_location ();
 191 #if !NET_2_1
 192                                 if ((loc != String.Empty) && SecurityManager.SecurityEnabled) {
 193                                         // we cannot divulge local file informations
 194                                         new FileIOPermission (FileIOPermissionAccess.PathDiscovery, loc).Demand ();
 195                                 }
 196 #endif
 197                                 return loc;
 198                         }
 199                 }
 200
 201                 [ComVisible (false)]
 202                 public virtual string ImageRuntimeVersion {
 203                         get {
 204                                 return InternalImageRuntimeVersion ();
 205                         }
 206                 }
 207
 208                 [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
 209                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
 210                 {
 211                         if (info == null)
 212                                 throw new ArgumentNullException ("info");
 213
 214                         UnitySerializationHolder.GetAssemblyData (this, info, context);
 215                 }
 216
 217                 public virtual bool IsDefined (Type attributeType, bool inherit)
 218                 {
 219                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 220                 }
 221
 222                 public virtual object [] GetCustomAttributes (bool inherit)
 223                 {
 224                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 225                 }
 226
 227                 public virtual object [] GetCustomAttributes (Type attributeType, bool inherit)
 228                 {
 229                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 230                 }
 231
 232                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 233                 private extern object GetFilesInternal (String name, bool getResourceModules);
 234
 235                 public virtual FileStream[] GetFiles ()
 236                 {
 237                         return GetFiles (false);
 238                 }
 239
 240                 public virtual FileStream [] GetFiles (bool getResourceModules)
 241                 {
 242                         string[] names = (string[]) GetFilesInternal (null, getResourceModules);
 243                         if (names == null)
 244                                 return EmptyArray<FileStream>.Value;
 245
 246                         string location = Location;
 247
 248                         FileStream[] res;
 249                         if (location != String.Empty) {
 250                                 res = new FileStream [names.Length + 1];
 251                                 res [0] = new FileStream (location, FileMode.Open, FileAccess.Read);
 252                                 for (int i = 0; i < names.Length; ++i)
 253                                         res [i + 1] = new FileStream (names [i], FileMode.Open, FileAccess.Read);
 254                         } else {
 255                                 res = new FileStream [names.Length];
 256                                 for (int i = 0; i < names.Length; ++i)
 257                                         res [i] = new FileStream (names [i], FileMode.Open, FileAccess.Read);
 258                         }
 259                         return res;
 260                 }
 261
 262                 public virtual FileStream GetFile (String name)
 263                 {
 264                         if (name == null)
 265                                 throw new ArgumentNullException (null, "Name cannot be null.");
 266                         if (name.Length == 0)
 267                                 throw new ArgumentException ("Empty name is not valid");
 268
 269                         string filename = (string)GetFilesInternal (name, true);
 270                         if (filename != null)
 271                                 return new FileStream (filename, FileMode.Open, FileAccess.Read);
 272                         else
 273                                 return null;
 274                 }
 275
 276                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 277                 internal extern IntPtr GetManifestResourceInternal (String name, out int size, out Module module);
 278
 279                 public virtual Stream GetManifestResourceStream (String name)
 280                 {
 281                         if (name == null)
 282                                 throw new ArgumentNullException ("name");
 283                         if (name.Length == 0)
 284                                 throw new ArgumentException ("String cannot have zero length.",
 285                                         "name");
 286
 287                         ManifestResourceInfo info = GetManifestResourceInfo (name);
 288                         if (info == null) {
 289                                 Assembly a = AppDomain.CurrentDomain.DoResourceResolve (name, this);
 290                                 if (a != null && a != this)
 291                                         return a.GetManifestResourceStream (name);
 292                                 else
 293                                         return null;
 294                         }
 295
 296                         if (info.ReferencedAssembly != null)
 297                                 return info.ReferencedAssembly.GetManifestResourceStream (name);
 298                         if ((info.FileName != null) && (info.ResourceLocation == 0)) {
 299                                 if (fromByteArray)
 300                                         throw new FileNotFoundException (info.FileName);
 301
 302                                 string location = Path.GetDirectoryName (Location);
 303                                 string filename = Path.Combine (location, info.FileName);
 304                                 return new FileStream (filename, FileMode.Open, FileAccess.Read);
 305                         }
 306
 307                         int size;
 308                         Module module;
 309                         IntPtr data = GetManifestResourceInternal (name, out size, out module);
 310                         if (data == (IntPtr) 0)
 311                                 return null;
 312                         else {
 313                                 UnmanagedMemoryStream stream;
 314                                 unsafe {
 315                                         stream = new UnmanagedMemoryStream ((byte*) data, size);
 316                                 }
 317                                 /*
 318                                  * The returned pointer points inside metadata, so
 319                                  * we have to increase the refcount of the module, and decrease
 320                                  * it when the stream is finalized.
 321                                  */
 322                                 stream.Closed += new EventHandler (new ResourceCloseHandler (module).OnClose);
 323                                 return stream;
 324                         }
 325                 }
 326
 327                 public virtual Stream GetManifestResourceStream (Type type, String name)
 328                 {
 329                         string ns;
 330                         if (type != null) {
 331                                 ns = type.Namespace;
 332                         } else {
 333                                 if (name == null)
 334                                         throw new ArgumentNullException ("type");
 335                                 ns = null;
 336                         }
 337
 338                         if (ns == null || ns.Length == 0)
 339                                 return GetManifestResourceStream (name);
 340                         else
 341                                 return GetManifestResourceStream (ns + "." + name);
 342                 }
 343
 344                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 345                 internal virtual extern Type[] GetTypes (bool exportedOnly);
 346
 347                 public virtual Type[] GetTypes ()
 348                 {
 349                         return GetTypes (false);
 350                 }
 351
 352                 public virtual Type[] GetExportedTypes ()
 353                 {
 354                         return GetTypes (true);
 355                 }
 356
 357                 public virtual Type GetType (String name, Boolean throwOnError)
 358                 {
 359                         return GetType (name, throwOnError, false);
 360                 }
 361
 362                 public virtual Type GetType (String name) {
 363                         return GetType (name, false, false);
 364                 }
 365
 366                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 367                 internal extern Type InternalGetType (Module module, String name, Boolean throwOnError, Boolean ignoreCase);
 368
 369                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 370                 internal extern static void InternalGetAssemblyName (string assemblyFile, AssemblyName aname);
 371
 372                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 373                 static extern void FillName (Assembly ass, AssemblyName aname);
 374
 375                 [MonoTODO ("copiedName == true is not supported")]
 376                 public virtual AssemblyName GetName (Boolean copiedName)
 377                 {
 378                         // CodeBase, which is restricted, will be copied into the AssemblyName object so...
 379                         if (SecurityManager.SecurityEnabled) {
 380                                 GetCodeBase (true); // this will ensure the Demand is made
 381                         }
 382                         return UnprotectedGetName ();
 383                 }
 384
 385                 public virtual AssemblyName GetName ()
 386                 {
 387                         return GetName (false);
 388                 }
 389
 390                 // the security runtime requires access to the assemblyname (e.g. to get the strongname)
 391                 internal virtual AssemblyName UnprotectedGetName ()
 392                 {
 393                         AssemblyName aname = new AssemblyName ();
 394                         FillName (this, aname);
 395                         return aname;
 396                 }
 397
 398                 public override string ToString ()
 399                 {
 400                         // note: ToString work without requiring CodeBase (so no checks are needed)
 401
 402                         if (assemblyName != null)
 403                                 return assemblyName;
 404
 405                         assemblyName = get_fullname ();
 406                         return assemblyName;
 407                 }
 408
 409                 public static String CreateQualifiedName (String assemblyName, String typeName)
 410                 {
 411                         return typeName + ", " + assemblyName;
 412                 }
 413
 414                 public static Assembly GetAssembly (Type type)
 415                 {
 416                         if (type != null)
 417                                 return type.Assembly;
 418                         throw new ArgumentNullException ("type");
 419                 }
 420
 421
 422                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 423                 public static extern Assembly GetEntryAssembly();
 424
 425                 internal Assembly GetSatelliteAssemblyNoThrow (CultureInfo culture, Version version)
 426                 {
 427                         return GetSatelliteAssembly (culture, version, false);
 428                 }
 429
 430                 internal Assembly GetSatelliteAssembly (CultureInfo culture, Version version, bool throwOnError)
 431                 {
 432                         if (culture == null)
 433                                 throw new ArgumentException ("culture");
 434
 435                         AssemblyName aname = GetName (true);
 436                         if (version != null)
 437                                 aname.Version = version;
 438
 439                         aname.CultureInfo = culture;
 440                         aname.Name = aname.Name + ".resources";
 441                         Assembly assembly;
 442
 443                         try {
 444                                 assembly = AppDomain.CurrentDomain.LoadSatellite (aname, false);
 445                                 if (assembly != null)
 446                                         return assembly;
 447                         } catch (FileNotFoundException) {
 448                                 assembly = null;
 449                                 // ignore
 450                         }
 451
 452                         // Try the assembly directory
 453                         string location = Path.GetDirectoryName (Location);
 454                         string fullName = Path.Combine (location, Path.Combine (culture.Name, aname.Name + ".dll"));
 455                         if (!throwOnError && !File.Exists (fullName))
 456                                 return null;
 457
 458                         return LoadFrom (fullName);
 459                 }
 460
 461                 Type _Assembly.GetType ()
 462                 {
 463                         // Required or object::GetType becomes virtual final
 464                         return base.GetType ();
 465                 }
 466
 467                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 468                 private extern static Assembly LoadFrom (String assemblyFile, bool refonly);
 469
 470                 public static Assembly LoadFrom (String assemblyFile)
 471                 {
 472                         return LoadFrom (assemblyFile, false);
 473                 }
 474
 475 #if NET_4_0
 476                 [Obsolete]
 477 #endif
 478                 public static Assembly LoadFrom (String assemblyFile, Evidence securityEvidence)
 479                 {
 480                         Assembly a = LoadFrom (assemblyFile, false);
 481 #if !NET_2_1
 482                         if ((a != null) && (securityEvidence != null)) {
 483                                 // merge evidence (i.e. replace defaults with provided evidences)
 484                                 a.Evidence.Merge (securityEvidence);
 485                         }
 486 #endif
 487                         return a;
 488                 }
 489
 490 #if NET_4_0
 491                 [Obsolete]
 492 #endif
 493                 [MonoTODO("This overload is not currently implemented")]
 494                 // FIXME: What are we missing?
 495                 public static Assembly LoadFrom (String assemblyFile, Evidence securityEvidence, byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm)
 496                 {
 497                         throw new NotImplementedException ();
 498                 }
 499
 500 #if NET_4_0
 501                 [MonoTODO]
 502                 public static Assembly LoadFrom (String assemblyFile, byte [] hashValue, AssemblyHashAlgorithm hashAlgorithm)
 503                 {
 504                         throw new NotImplementedException ();
 505                 }
 506 #endif
 507
 508 #if NET_4_0
 509                 public static Assembly UnsafeLoadFrom (String assemblyFile)
 510                 {
 511                         return LoadFrom (assemblyFile);
 512                 }
 513 #endif
 514
 515 #if NET_4_0
 516                 [Obsolete]
 517 #endif
 518                 public static Assembly LoadFile (String path, Evidence securityEvidence)
 519                 {
 520                         if (path == null)
 521                                 throw new ArgumentNullException ("path");
 522                         if (path == String.Empty)
 523                                 throw new ArgumentException ("Path can't be empty", "path");
 524                         // FIXME: Make this do the right thing
 525                         return LoadFrom (path, securityEvidence);
 526                 }
 527
 528                 public static Assembly LoadFile (String path)
 529                 {
 530                         return LoadFile (path, null);
 531                 }
 532
 533                 public static Assembly Load (String assemblyString)
 534                 {
 535                         return AppDomain.CurrentDomain.Load (assemblyString);
 536                 }
 537
 538 #if NET_4_0
 539                 [Obsolete]
 540 #endif
 541                 public static Assembly Load (String assemblyString, Evidence assemblySecurity)
 542                 {
 543                         return AppDomain.CurrentDomain.Load (assemblyString, assemblySecurity);
 544                 }
 545
 546                 public static Assembly Load (AssemblyName assemblyRef)
 547                 {
 548                         return AppDomain.CurrentDomain.Load (assemblyRef);
 549                 }
 550
 551 #if NET_4_0
 552                 [Obsolete]
 553 #endif
 554                 public static Assembly Load (AssemblyName assemblyRef, Evidence assemblySecurity)
 555                 {
 556                         return AppDomain.CurrentDomain.Load (assemblyRef, assemblySecurity);
 557                 }
 558
 559                 public static Assembly Load (Byte[] rawAssembly)
 560                 {
 561                         return AppDomain.CurrentDomain.Load (rawAssembly);
 562                 }
 563
 564                 public static Assembly Load (Byte[] rawAssembly, Byte[] rawSymbolStore)
 565                 {
 566                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore);
 567                 }
 568
 569 #if NET_4_0
 570                 [Obsolete]
 571 #endif
 572                 public static Assembly Load (Byte[] rawAssembly, Byte[] rawSymbolStore,
 573                                              Evidence securityEvidence)
 574                 {
 575                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore, securityEvidence);
 576                 }
 577
 578 #if NET_4_0
 579                 [MonoLimitation ("Argument securityContextSource is ignored")]
 580                 public static Assembly Load (byte [] rawAssembly, byte [] rawSymbolStore, SecurityContextSource securityContextSource)
 581                 {
 582                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore);
 583                 }
 584 #endif
 585
 586                 public static Assembly ReflectionOnlyLoad (byte[] rawAssembly)
 587                 {
 588                         return AppDomain.CurrentDomain.Load (rawAssembly, null, null, true);
 589                 }
 590
 591                 public static Assembly ReflectionOnlyLoad (string assemblyString)
 592                 {
 593                         return AppDomain.CurrentDomain.Load (assemblyString, null, true);
 594                 }
 595
 596                 public static Assembly ReflectionOnlyLoadFrom (string assemblyFile)
 597                 {
 598                         if (assemblyFile == null)
 599                                 throw new ArgumentNullException ("assemblyFile");
 600
 601                         return LoadFrom (assemblyFile, true);
 602                 }
 603
 604                 [Obsolete]
 605                 public static Assembly LoadWithPartialName (string partialName)
 606                 {
 607                         return LoadWithPartialName (partialName, null);
 608                 }
 609
 610                 [MonoTODO ("Not implemented")]
 611                 public Module LoadModule (string moduleName, byte [] rawModule)
 612                 {
 613                         throw new NotImplementedException ();
 614                 }
 615
 616                 [MonoTODO ("Not implemented")]
 617                 public
 618 #if NET_4_0
 619                 virtual
 620 #endif
 621                 Module LoadModule (string moduleName, byte [] rawModule, byte [] rawSymbolStore)
 622                 {
 623                         throw new NotImplementedException ();
 624                 }
 625
 626                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 627                 private static extern Assembly load_with_partial_name (string name, Evidence e);
 628
 629                 [Obsolete]
 630                 public static Assembly LoadWithPartialName (string partialName, Evidence securityEvidence)
 631                 {
 632                         return LoadWithPartialName (partialName, securityEvidence, true);
 633                 }
 634
 635                 /**
 636                  * LAMESPEC: It is possible for this method to throw exceptions IF the name supplied
 637                  * is a valid gac name and contains filesystem entry charachters at the end of the name
 638                  * ie System/// will throw an exception. However ////System will not as that is canocolized
 639                  * out of the name.
 640                  */
 641
 642                 // FIXME: LoadWithPartialName must look cache (no CAS) or read from disk (CAS)
 643                 internal static Assembly LoadWithPartialName (string partialName, Evidence securityEvidence, bool oldBehavior)
 644                 {
 645                         if (!oldBehavior)
 646                                 throw new NotImplementedException ();
 647
 648                         if (partialName == null)
 649                                 throw new NullReferenceException ();
 650
 651                         return load_with_partial_name (partialName, securityEvidence);
 652                 }
 653
 654                 public Object CreateInstance (String typeName)
 655                 {
 656                         return CreateInstance (typeName, false);
 657                 }
 658
 659                 public Object CreateInstance (String typeName, Boolean ignoreCase)
 660                 {
 661                         Type t = GetType (typeName, false, ignoreCase);
 662                         if (t == null)
 663                                 return null;
 664
 665                         try {
 666                                 return Activator.CreateInstance (t);
 667                         } catch (InvalidOperationException) {
 668                                 throw new ArgumentException ("It is illegal to invoke a method on a Type loaded via ReflectionOnly methods.");
 669                         }
 670                 }
 671
 672                 public
 673 #if NET_4_0
 674                 virtual
 675 #endif
 676                 Object CreateInstance (String typeName, Boolean ignoreCase,
 677                                               BindingFlags bindingAttr, Binder binder,
 678                                               Object[] args, CultureInfo culture,
 679                                               Object[] activationAttributes)
 680                 {
 681                         Type t = GetType (typeName, false, ignoreCase);
 682                         if (t == null)
 683                                 return null;
 684
 685                         try {
 686                                 return Activator.CreateInstance (t, bindingAttr, binder, args, culture, activationAttributes);
 687                         } catch (InvalidOperationException) {
 688                                 throw new ArgumentException ("It is illegal to invoke a method on a Type loaded via ReflectionOnly methods.");
 689                         }
 690                 }
 691
 692                 public Module[] GetLoadedModules ()
 693                 {
 694                         return GetLoadedModules (false);
 695                 }
 696
 697                 public Module[] GetModules ()
 698                 {
 699                         return GetModules (false);
 700                 }
 701
 702                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 703                 internal virtual extern Module[] GetModulesInternal ();
 704
 705
 706                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 707                 internal extern string[] GetNamespaces ();
 708
 709                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 710                 public extern virtual String[] GetManifestResourceNames ();
 711
 712                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 713                 public extern static Assembly GetExecutingAssembly ();
 714
 715                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 716                 public extern static Assembly GetCallingAssembly ();
 717
 718                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 719                 internal static extern AssemblyName[] GetReferencedAssemblies (Assembly module);
 720
 721                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 722                 private extern bool GetManifestResourceInfoInternal (String name, ManifestResourceInfo info);
 723
 724                 public virtual ManifestResourceInfo GetManifestResourceInfo (String resourceName)
 725                 {
 726                         if (resourceName == null)
 727                                 throw new ArgumentNullException ("resourceName");
 728                         if (resourceName.Length == 0)
 729                                 throw new ArgumentException ("String cannot have zero length.");
 730                         ManifestResourceInfo result = new ManifestResourceInfo ();
 731                         bool found = GetManifestResourceInfoInternal (resourceName, result);
 732                         if (found)
 733                                 return result;
 734                         else
 735                                 return null;
 736                 }
 737
 738                 private class ResourceCloseHandler {
 739 #pragma warning disable 169, 414
 740                         Module module;
 741 #pragma warning restore 169, 414
 742
 743                         public ResourceCloseHandler (Module module) {
 744                                 this.module = module;
 745                         }
 746
 747                         public void OnClose (object sender, EventArgs e) {
 748                                 // The module dtor will take care of things
 749                                 module = null;
 750                         }
 751                 }
 752
 753                 //
 754                 // The following functions are only for the Mono Debugger.
 755                 //
 756
 757                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 758                 internal static extern int MonoDebugger_GetMethodToken (MethodBase method);
 759
 760                 [MonoTODO ("Currently it always returns zero")]
 761                 [ComVisible (false)]
 762                 public
 763 #if NET_4_0
 764                 virtual
 765 #endif
 766                 long HostContext {
 767                         get { return 0; }
 768                 }
 769
 770
 771                 internal virtual Module GetManifestModule () {
 772                         return GetManifestModuleInternal ();
 773                 }
 774
 775                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 776                 internal extern Module GetManifestModuleInternal ();
 777
 778                 [ComVisible (false)]
 779                 public virtual extern bool ReflectionOnly {
 780                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 781                         get;
 782                 }
 783
 784                 public override int GetHashCode ()
 785                 {
 786                         return base.GetHashCode ();
 787                 }
 788
 789                 public override bool Equals (object o)
 790                 {
 791                         if (((object) this) == o)
 792                                 return true;
 793
 794                         if (o == null)
 795                                 return false;
 796
 797                         Assembly other = (Assembly) o;
 798                         return other._mono_assembly == _mono_assembly;
 799                 }
 800
 801 #if !NET_2_1
 802                 // Code Access Security
 803
 804                 internal void Resolve ()
 805                 {
 806                         lock (this) {
 807                                 // FIXME: As we (currently) delay the resolution until the first CAS
 808                                 // Demand it's too late to evaluate the Minimum permission set as a
 809                                 // condition to load the assembly into the AppDomain
 810                                 LoadAssemblyPermissions ();
 811                                 Evidence e = new Evidence (UnprotectedGetEvidence ()); // we need a copy to add PRE
 812                                 e.AddHost (new PermissionRequestEvidence (_minimum, _optional, _refuse));
 813                                 _granted = SecurityManager.ResolvePolicy (e,
 814                                         _minimum, _optional, _refuse, out _denied);
 815                         }
 816                 }
 817
 818                 internal PermissionSet GrantedPermissionSet {
 819                         get {
 820                                 if (_granted == null) {
 821                                         if (SecurityManager.ResolvingPolicyLevel != null) {
 822                                                 if (SecurityManager.ResolvingPolicyLevel.IsFullTrustAssembly (this))
 823                                                         return DefaultPolicies.FullTrust;
 824                                                 else
 825                                                         return null; // we can't resolve during resolution
 826                                         }
 827                                         Resolve ();
 828                                 }
 829                                 return _granted;
 830                         }
 831                 }
 832
 833                 internal PermissionSet DeniedPermissionSet {
 834                         get {
 835                                 // yes we look for granted, as denied may be null
 836                                 if (_granted == null) {
 837                                         if (SecurityManager.ResolvingPolicyLevel != null) {
 838                                                 if (SecurityManager.ResolvingPolicyLevel.IsFullTrustAssembly (this))
 839                                                         return null;
 840                                                 else
 841                                                         return DefaultPolicies.FullTrust; // deny unrestricted
 842                                         }
 843                                         Resolve ();
 844                                 }
 845                                 return _denied;
 846                         }
 847                 }
 848
 849                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 850                 extern internal static bool LoadPermissions (Assembly a,
 851                         ref IntPtr minimum, ref int minLength,
 852                         ref IntPtr optional, ref int optLength,
 853                         ref IntPtr refused, ref int refLength);
 854
 855                 // Support for SecurityAction.RequestMinimum, RequestOptional and RequestRefuse
 856                 private void LoadAssemblyPermissions ()
 857                 {
 858                         IntPtr minimum = IntPtr.Zero, optional = IntPtr.Zero, refused = IntPtr.Zero;
 859                         int minLength = 0, optLength = 0, refLength = 0;
 860                         if (LoadPermissions (this, ref minimum, ref minLength, ref optional,
 861                                 ref optLength, ref refused, ref refLength)) {
 862
 863                                 // Note: no need to cache these permission sets as they will only be created once
 864                                 // at assembly resolution time.
 865                                 if (minLength > 0) {
 866                                         byte[] data = new byte [minLength];
 867                                         Marshal.Copy (minimum, data, 0, minLength);
 868                                         _minimum = SecurityManager.Decode (data);
 869                                 }
 870                                 if (optLength > 0) {
 871                                         byte[] data = new byte [optLength];
 872                                         Marshal.Copy (optional, data, 0, optLength);
 873                                         _optional = SecurityManager.Decode (data);
 874                                 }
 875                                 if (refLength > 0) {
 876                                         byte[] data = new byte [refLength];
 877                                         Marshal.Copy (refused, data, 0, refLength);
 878                                         _refuse = SecurityManager.Decode (data);
 879                                 }
 880                         }
 881                 }
 882
 883 #if NET_4_0
 884                 public virtual PermissionSet PermissionSet {
 885                         get { return this.GrantedPermissionSet; }
 886                 }
 887
 888                 public virtual SecurityRuleSet SecurityRuleSet {
 889                         get { throw CreateNIE (); }
 890                 }
 891 #endif
 892
 893 #endif
 894
 895 #if NET_4_0
 896                 static Exception CreateNIE ()
 897                 {
 898                         return new NotImplementedException ("Derived classes must implement it");
 899                 }
 900
 901                 public virtual IList<CustomAttributeData> GetCustomAttributesData ()
 902                 {
 903                         return CustomAttributeData.GetCustomAttributes (this);
 904                 }
 905
 906                 [MonoTODO]
 907                 public bool IsFullyTrusted {
 908                         get { return true; }
 909                 }
 910
 911                 public virtual Type GetType (string name, bool throwOnError, bool ignoreCase)
 912                 {
 913                         throw CreateNIE ();
 914                 }
 915
 916                 public virtual Module GetModule (String name)
 917                 {
 918                         throw CreateNIE ();
 919                 }
 920
 921                 public virtual AssemblyName[] GetReferencedAssemblies ()
 922                 {
 923                         throw CreateNIE ();
 924                 }
 925
 926                 public virtual Module[] GetModules (bool getResourceModules)
 927                 {
 928                         throw CreateNIE ();
 929                 }
 930
 931                 [MonoTODO ("Always returns the same as GetModules")]
 932                 public virtual Module[] GetLoadedModules (bool getResourceModules)
 933                 {
 934                         throw CreateNIE ();
 935                 }
 936
 937                 public virtual Assembly GetSatelliteAssembly (CultureInfo culture)
 938                 {
 939                         throw CreateNIE ();
 940                 }
 941
 942                 public virtual Assembly GetSatelliteAssembly (CultureInfo culture, Version version)
 943                 {
 944                         throw CreateNIE ();
 945                 }
 946
 947                 public virtual Module ManifestModule {
 948                         get { throw CreateNIE (); }
 949                 }
 950
 951                 public virtual bool GlobalAssemblyCache {
 952                         get { throw CreateNIE (); }
 953                 }
 954
 955                 public virtual bool IsDynamic {
 956                         get { return false; }
 957                 }
 958
 959                 public static bool operator == (Assembly left, Assembly right)
 960                 {
 961                         if ((object)left == (object)right)
 962                                 return true;
 963                         if ((object)left == null ^ (object)right == null)
 964                                 return false;
 965                         return left.Equals (right);
 966                 }
 967
 968                 public static bool operator != (Assembly left, Assembly right)
 969                 {
 970                         if ((object)left == (object)right)
 971                                 return false;
 972                         if ((object)left == null ^ (object)right == null)
 973                                 return true;
 974                         return !left.Equals (right);
 975                 }
 976 #endif
 977         }
 978 }