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