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 MOONLIGHT
  55         public abstract 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 || MOONLIGHT || MOBILE
  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 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 #endif
 182                 internal bool FromByteArray {
 183                         set { fromByteArray = value; }
 184                 }
 185
 186                 public virtual String Location {
 187                         get {
 188                                 if (fromByteArray)
 189                                         return String.Empty;
 190
 191                                 string loc = get_location ();
 192 #if !NET_2_1
 193                                 if ((loc != String.Empty) && SecurityManager.SecurityEnabled) {
 194                                         // we cannot divulge local file informations
 195                                         new FileIOPermission (FileIOPermissionAccess.PathDiscovery, loc).Demand ();
 196                                 }
 197 #endif
 198                                 return loc;
 199                         }
 200                 }
 201
 202                 [ComVisible (false)]
 203                 public virtual string ImageRuntimeVersion {
 204                         get {
 205                                 return InternalImageRuntimeVersion ();
 206                         }
 207                 }
 208
 209                 [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
 210                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
 211                 {
 212                         if (info == null)
 213                                 throw new ArgumentNullException ("info");
 214
 215                         UnitySerializationHolder.GetAssemblyData (this, info, context);
 216                 }
 217
 218                 public virtual bool IsDefined (Type attributeType, bool inherit)
 219                 {
 220                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 221                 }
 222
 223                 public virtual object [] GetCustomAttributes (bool inherit)
 224                 {
 225                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 226                 }
 227
 228                 public virtual object [] GetCustomAttributes (Type attributeType, bool inherit)
 229                 {
 230                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 231                 }
 232
 233                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 234                 private extern object GetFilesInternal (String name, bool getResourceModules);
 235
 236                 public virtual FileStream[] GetFiles ()
 237                 {
 238                         return GetFiles (false);
 239                 }
 240
 241                 public virtual FileStream [] GetFiles (bool getResourceModules)
 242                 {
 243                         string[] names = (string[]) GetFilesInternal (null, getResourceModules);
 244                         if (names == null)
 245                                 return new FileStream [0];
 246
 247                         string location = Location;
 248
 249                         FileStream[] res;
 250                         if (location != String.Empty) {
 251                                 res = new FileStream [names.Length + 1];
 252                                 res [0] = new FileStream (location, FileMode.Open, FileAccess.Read);
 253                                 for (int i = 0; i < names.Length; ++i)
 254                                         res [i + 1] = new FileStream (names [i], FileMode.Open, FileAccess.Read);
 255                         } else {
 256                                 res = new FileStream [names.Length];
 257                                 for (int i = 0; i < names.Length; ++i)
 258                                         res [i] = new FileStream (names [i], FileMode.Open, FileAccess.Read);
 259                         }
 260                         return res;
 261                 }
 262
 263                 public virtual FileStream GetFile (String name)
 264                 {
 265                         if (name == null)
 266                                 throw new ArgumentNullException (null, "Name cannot be null.");
 267                         if (name.Length == 0)
 268                                 throw new ArgumentException ("Empty name is not valid");
 269
 270                         string filename = (string)GetFilesInternal (name, true);
 271                         if (filename != null)
 272                                 return new FileStream (filename, FileMode.Open, FileAccess.Read);
 273                         else
 274                                 return null;
 275                 }
 276
 277                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 278                 internal extern IntPtr GetManifestResourceInternal (String name, out int size, out Module module);
 279
 280                 public virtual Stream GetManifestResourceStream (String name)
 281                 {
 282                         if (name == null)
 283                                 throw new ArgumentNullException ("name");
 284                         if (name.Length == 0)
 285                                 throw new ArgumentException ("String cannot have zero length.",
 286                                         "name");
 287
 288                         ManifestResourceInfo info = GetManifestResourceInfo (name);
 289                         if (info == null) {
 290                                 Assembly a = AppDomain.CurrentDomain.DoResourceResolve (name, this);
 291                                 if (a != null && a != this)
 292                                         return a.GetManifestResourceStream (name);
 293                                 else
 294                                         return null;
 295                         }
 296
 297                         if (info.ReferencedAssembly != null)
 298                                 return info.ReferencedAssembly.GetManifestResourceStream (name);
 299                         if ((info.FileName != null) && (info.ResourceLocation == 0)) {
 300                                 if (fromByteArray)
 301                                         throw new FileNotFoundException (info.FileName);
 302
 303                                 string location = Path.GetDirectoryName (Location);
 304                                 string filename = Path.Combine (location, info.FileName);
 305 #if MOONLIGHT
 306                                 // we don't control the content of 'info.FileName' so we want to make sure we keep to ourselves
 307                                 filename = Path.GetFullPath (filename);
 308                                 if (!filename.StartsWith (location))
 309                                         throw new SecurityException ("non-rooted access to manifest resource");
 310 #endif
 311                                 return new FileStream (filename, FileMode.Open, FileAccess.Read);
 312                         }
 313
 314                         int size;
 315                         Module module;
 316                         IntPtr data = GetManifestResourceInternal (name, out size, out module);
 317                         if (data == (IntPtr) 0)
 318                                 return null;
 319                         else {
 320                                 UnmanagedMemoryStream stream;
 321                                 unsafe {
 322                                         stream = new UnmanagedMemoryStream ((byte*) data, size);
 323                                 }
 324                                 /*
 325                                  * The returned pointer points inside metadata, so
 326                                  * we have to increase the refcount of the module, and decrease
 327                                  * it when the stream is finalized.
 328                                  */
 329                                 stream.Closed += new EventHandler (new ResourceCloseHandler (module).OnClose);
 330                                 return stream;
 331                         }
 332                 }
 333
 334                 public virtual Stream GetManifestResourceStream (Type type, String name)
 335                 {
 336                         string ns;
 337                         if (type != null) {
 338                                 ns = type.Namespace;
 339                         } else {
 340                                 if (name == null)
 341                                         throw new ArgumentNullException ("type");
 342                                 ns = null;
 343                         }
 344
 345                         if (ns == null || ns.Length == 0)
 346                                 return GetManifestResourceStream (name);
 347                         else
 348                                 return GetManifestResourceStream (ns + "." + name);
 349                 }
 350
 351                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 352                 internal virtual extern Type[] GetTypes (bool exportedOnly);
 353
 354                 public virtual Type[] GetTypes ()
 355                 {
 356                         return GetTypes (false);
 357                 }
 358
 359                 public virtual Type[] GetExportedTypes ()
 360                 {
 361                         return GetTypes (true);
 362                 }
 363
 364                 public virtual Type GetType (String name, Boolean throwOnError)
 365                 {
 366                         return GetType (name, throwOnError, false);
 367                 }
 368
 369                 public virtual Type GetType (String name) {
 370                         return GetType (name, false, false);
 371                 }
 372
 373                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 374                 internal extern Type InternalGetType (Module module, String name, Boolean throwOnError, Boolean ignoreCase);
 375
 376                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 377                 internal extern static void InternalGetAssemblyName (string assemblyFile, AssemblyName aname);
 378
 379                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 380                 static extern void FillName (Assembly ass, AssemblyName aname);
 381
 382                 [MonoTODO ("copiedName == true is not supported")]
 383                 public virtual AssemblyName GetName (Boolean copiedName)
 384                 {
 385                         // CodeBase, which is restricted, will be copied into the AssemblyName object so...
 386                         if (SecurityManager.SecurityEnabled) {
 387                                 GetCodeBase (true); // this will ensure the Demand is made
 388                         }
 389                         return UnprotectedGetName ();
 390                 }
 391
 392                 public virtual AssemblyName GetName ()
 393                 {
 394                         return GetName (false);
 395                 }
 396
 397                 // the security runtime requires access to the assemblyname (e.g. to get the strongname)
 398                 internal virtual AssemblyName UnprotectedGetName ()
 399                 {
 400                         AssemblyName aname = new AssemblyName ();
 401                         FillName (this, aname);
 402                         return aname;
 403                 }
 404
 405                 public override string ToString ()
 406                 {
 407                         // note: ToString work without requiring CodeBase (so no checks are needed)
 408
 409                         if (assemblyName != null)
 410                                 return assemblyName;
 411
 412                         assemblyName = get_fullname ();
 413                         return assemblyName;
 414                 }
 415
 416                 public static String CreateQualifiedName (String assemblyName, String typeName)
 417                 {
 418                         return typeName + ", " + assemblyName;
 419                 }
 420
 421                 public static Assembly GetAssembly (Type type)
 422                 {
 423                         if (type != null)
 424                                 return type.Assembly;
 425                         throw new ArgumentNullException ("type");
 426                 }
 427
 428
 429                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 430                 public static extern Assembly GetEntryAssembly();
 431
 432                 internal Assembly GetSatelliteAssemblyNoThrow (CultureInfo culture, Version version)
 433                 {
 434                         return GetSatelliteAssembly (culture, version, false);
 435                 }
 436
 437                 internal Assembly GetSatelliteAssembly (CultureInfo culture, Version version, bool throwOnError)
 438                 {
 439                         if (culture == null)
 440                                 throw new ArgumentException ("culture");
 441
 442                         AssemblyName aname = GetName (true);
 443                         if (version != null)
 444                                 aname.Version = version;
 445
 446                         aname.CultureInfo = culture;
 447                         aname.Name = aname.Name + ".resources";
 448                         Assembly assembly;
 449
 450                         try {
 451                                 assembly = AppDomain.CurrentDomain.LoadSatellite (aname, false);
 452                                 if (assembly != null)
 453                                         return assembly;
 454                         } catch (FileNotFoundException) {
 455                                 assembly = null;
 456                                 // ignore
 457                         }
 458
 459                         // Try the assembly directory
 460                         string location = Path.GetDirectoryName (Location);
 461                         string fullName = Path.Combine (location, Path.Combine (culture.Name, aname.Name + ".dll"));
 462 #if MOONLIGHT
 463                         // it's unlikely that culture.Name or aname.Name could contain stuff like ".." but...
 464                         fullName = Path.GetFullPath (fullName);
 465                         if (!fullName.StartsWith (location)) {
 466                                 if (throwOnError)
 467                                         throw new SecurityException ("non-rooted access to satellite assembly");
 468                                 return null;
 469                         }
 470 #endif
 471                         if (!throwOnError && !File.Exists (fullName))
 472                                 return null;
 473
 474                         return LoadFrom (fullName);
 475                 }
 476
 477                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 478                 private extern static Assembly LoadFrom (String assemblyFile, bool refonly);
 479
 480                 public static Assembly LoadFrom (String assemblyFile)
 481                 {
 482                         return LoadFrom (assemblyFile, false);
 483                 }
 484
 485 #if NET_4_0
 486                 [Obsolete]
 487 #endif
 488                 public static Assembly LoadFrom (String assemblyFile, Evidence securityEvidence)
 489                 {
 490                         Assembly a = LoadFrom (assemblyFile, false);
 491 #if !NET_2_1
 492                         if ((a != null) && (securityEvidence != null)) {
 493                                 // merge evidence (i.e. replace defaults with provided evidences)
 494                                 a.Evidence.Merge (securityEvidence);
 495                         }
 496 #endif
 497                         return a;
 498                 }
 499
 500 #if NET_4_0
 501                 [Obsolete]
 502 #endif
 503                 [MonoTODO("This overload is not currently implemented")]
 504                 // FIXME: What are we missing?
 505                 public static Assembly LoadFrom (String assemblyFile, Evidence securityEvidence, byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm)
 506                 {
 507                         throw new NotImplementedException ();
 508                 }
 509
 510 #if NET_4_0
 511                 [MonoTODO]
 512                 public static Assembly LoadFrom (String assemblyFile, byte [] hashValue, AssemblyHashAlgorithm hashAlgorithm)
 513                 {
 514                         throw new NotImplementedException ();
 515                 }
 516 #endif
 517
 518 #if NET_4_0
 519                 public static Assembly UnsafeLoadFrom (String assemblyFile)
 520                 {
 521                         return LoadFrom (assemblyFile);
 522                 }
 523 #endif
 524
 525 #if NET_4_0
 526                 [Obsolete]
 527 #endif
 528                 public static Assembly LoadFile (String path, Evidence securityEvidence)
 529                 {
 530                         if (path == null)
 531                                 throw new ArgumentNullException ("path");
 532                         if (path == String.Empty)
 533                                 throw new ArgumentException ("Path can't be empty", "path");
 534                         // FIXME: Make this do the right thing
 535                         return LoadFrom (path, securityEvidence);
 536                 }
 537
 538                 public static Assembly LoadFile (String path)
 539                 {
 540                         return LoadFile (path, null);
 541                 }
 542
 543                 public static Assembly Load (String assemblyString)
 544                 {
 545                         return AppDomain.CurrentDomain.Load (assemblyString);
 546                 }
 547
 548 #if NET_4_0
 549                 [Obsolete]
 550 #endif
 551                 public static Assembly Load (String assemblyString, Evidence assemblySecurity)
 552                 {
 553                         return AppDomain.CurrentDomain.Load (assemblyString, assemblySecurity);
 554                 }
 555
 556                 public static Assembly Load (AssemblyName assemblyRef)
 557                 {
 558                         return AppDomain.CurrentDomain.Load (assemblyRef);
 559                 }
 560
 561 #if NET_4_0
 562                 [Obsolete]
 563 #endif
 564                 public static Assembly Load (AssemblyName assemblyRef, Evidence assemblySecurity)
 565                 {
 566                         return AppDomain.CurrentDomain.Load (assemblyRef, assemblySecurity);
 567                 }
 568
 569                 public static Assembly Load (Byte[] rawAssembly)
 570                 {
 571                         return AppDomain.CurrentDomain.Load (rawAssembly);
 572                 }
 573
 574                 public static Assembly Load (Byte[] rawAssembly, Byte[] rawSymbolStore)
 575                 {
 576                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore);
 577                 }
 578
 579 #if NET_4_0
 580                 [Obsolete]
 581 #endif
 582                 public static Assembly Load (Byte[] rawAssembly, Byte[] rawSymbolStore,
 583                                              Evidence securityEvidence)
 584                 {
 585                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore, securityEvidence);
 586                 }
 587
 588 #if NET_4_0
 589                 [MonoLimitation ("Argument securityContextSource is ignored")]
 590                 public static Assembly Load (byte [] rawAssembly, byte [] rawSymbolStore, SecurityContextSource securityContextSource)
 591                 {
 592                         return AppDomain.CurrentDomain.Load (rawAssembly, rawSymbolStore);
 593                 }
 594 #endif
 595
 596                 public static Assembly ReflectionOnlyLoad (byte[] rawAssembly)
 597                 {
 598                         return AppDomain.CurrentDomain.Load (rawAssembly, null, null, true);
 599                 }
 600
 601                 public static Assembly ReflectionOnlyLoad (string assemblyString)
 602                 {
 603                         return AppDomain.CurrentDomain.Load (assemblyString, null, true);
 604                 }
 605
 606                 public static Assembly ReflectionOnlyLoadFrom (string assemblyFile)
 607                 {
 608                         if (assemblyFile == null)
 609                                 throw new ArgumentNullException ("assemblyFile");
 610
 611                         return LoadFrom (assemblyFile, true);
 612                 }
 613
 614                 [Obsolete]
 615                 public static Assembly LoadWithPartialName (string partialName)
 616                 {
 617                         return LoadWithPartialName (partialName, null);
 618                 }
 619
 620                 [MonoTODO ("Not implemented")]
 621                 public Module LoadModule (string moduleName, byte [] rawModule)
 622                 {
 623                         throw new NotImplementedException ();
 624                 }
 625
 626                 [MonoTODO ("Not implemented")]
 627                 public
 628 #if NET_4_0 || MOONLIGHT || MOBILE
 629                 virtual
 630 #endif
 631                 Module LoadModule (string moduleName, byte [] rawModule, byte [] rawSymbolStore)
 632                 {
 633                         throw new NotImplementedException ();
 634                 }
 635
 636                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 637                 private static extern Assembly load_with_partial_name (string name, Evidence e);
 638
 639                 [Obsolete]
 640                 public static Assembly LoadWithPartialName (string partialName, Evidence securityEvidence)
 641                 {
 642                         return LoadWithPartialName (partialName, securityEvidence, true);
 643                 }
 644
 645                 /**
 646                  * LAMESPEC: It is possible for this method to throw exceptions IF the name supplied
 647                  * is a valid gac name and contains filesystem entry charachters at the end of the name
 648                  * ie System/// will throw an exception. However ////System will not as that is canocolized
 649                  * out of the name.
 650                  */
 651
 652                 // FIXME: LoadWithPartialName must look cache (no CAS) or read from disk (CAS)
 653                 internal static Assembly LoadWithPartialName (string partialName, Evidence securityEvidence, bool oldBehavior)
 654                 {
 655                         if (!oldBehavior)
 656                                 throw new NotImplementedException ();
 657
 658                         if (partialName == null)
 659                                 throw new NullReferenceException ();
 660
 661                         return load_with_partial_name (partialName, securityEvidence);
 662                 }
 663
 664                 public Object CreateInstance (String typeName)
 665                 {
 666                         return CreateInstance (typeName, false);
 667                 }
 668
 669                 public Object CreateInstance (String typeName, Boolean ignoreCase)
 670                 {
 671                         Type t = GetType (typeName, false, ignoreCase);
 672                         if (t == null)
 673                                 return null;
 674
 675                         try {
 676                                 return Activator.CreateInstance (t);
 677                         } catch (InvalidOperationException) {
 678                                 throw new ArgumentException ("It is illegal to invoke a method on a Type loaded via ReflectionOnly methods.");
 679                         }
 680                 }
 681
 682                 public
 683 #if NET_4_0 || MOONLIGHT || MOBILE
 684                 virtual
 685 #endif
 686                 Object CreateInstance (String typeName, Boolean ignoreCase,
 687                                               BindingFlags bindingAttr, Binder binder,
 688                                               Object[] args, CultureInfo culture,
 689                                               Object[] activationAttributes)
 690                 {
 691                         Type t = GetType (typeName, false, ignoreCase);
 692                         if (t == null)
 693                                 return null;
 694
 695                         try {
 696                                 return Activator.CreateInstance (t, bindingAttr, binder, args, culture, activationAttributes);
 697                         } catch (InvalidOperationException) {
 698                                 throw new ArgumentException ("It is illegal to invoke a method on a Type loaded via ReflectionOnly methods.");
 699                         }
 700                 }
 701
 702                 public Module[] GetLoadedModules ()
 703                 {
 704                         return GetLoadedModules (false);
 705                 }
 706
 707                 public Module[] GetModules ()
 708                 {
 709                         return GetModules (false);
 710                 }
 711
 712                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 713                 internal virtual extern Module[] GetModulesInternal ();
 714
 715
 716                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 717                 internal extern string[] GetNamespaces ();
 718
 719                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 720                 public extern virtual String[] GetManifestResourceNames ();
 721
 722                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 723                 public extern static Assembly GetExecutingAssembly ();
 724
 725                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 726                 public extern static Assembly GetCallingAssembly ();
 727
 728                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 729                 internal static extern AssemblyName[] GetReferencedAssemblies (Assembly module);
 730
 731                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 732                 private extern bool GetManifestResourceInfoInternal (String name, ManifestResourceInfo info);
 733
 734                 public virtual ManifestResourceInfo GetManifestResourceInfo (String resourceName)
 735                 {
 736                         if (resourceName == null)
 737                                 throw new ArgumentNullException ("resourceName");
 738                         if (resourceName.Length == 0)
 739                                 throw new ArgumentException ("String cannot have zero length.");
 740                         ManifestResourceInfo result = new ManifestResourceInfo ();
 741                         bool found = GetManifestResourceInfoInternal (resourceName, result);
 742                         if (found)
 743                                 return result;
 744                         else
 745                                 return null;
 746                 }
 747
 748                 private class ResourceCloseHandler {
 749 #pragma warning disable 169, 414
 750                         Module module;
 751 #pragma warning restore 169, 414
 752
 753                         public ResourceCloseHandler (Module module) {
 754                                 this.module = module;
 755                         }
 756
 757                         public void OnClose (object sender, EventArgs e) {
 758                                 // The module dtor will take care of things
 759                                 module = null;
 760                         }
 761                 }
 762
 763                 //
 764                 // The following functions are only for the Mono Debugger.
 765                 //
 766
 767                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 768                 internal static extern int MonoDebugger_GetMethodToken (MethodBase method);
 769
 770                 [MonoTODO ("Currently it always returns zero")]
 771                 [ComVisible (false)]
 772                 public
 773 #if NET_4_0 || MOONLIGHT || MOBILE
 774                 virtual
 775 #endif
 776                 long HostContext {
 777                         get { return 0; }
 778                 }
 779
 780
 781                 internal virtual Module GetManifestModule () {
 782                         return GetManifestModuleInternal ();
 783                 }
 784
 785                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 786                 internal extern Module GetManifestModuleInternal ();
 787
 788                 [ComVisible (false)]
 789                 public virtual extern bool ReflectionOnly {
 790                         [MethodImplAttribute (MethodImplOptions.InternalCall)]
 791                         get;
 792                 }
 793
 794                 public override int GetHashCode ()
 795                 {
 796                         return base.GetHashCode ();
 797                 }
 798
 799                 public override bool Equals (object o)
 800                 {
 801                         if (((object) this) == o)
 802                                 return true;
 803
 804                         if (o == null)
 805                                 return false;
 806
 807                         Assembly other = (Assembly) o;
 808                         return other._mono_assembly == _mono_assembly;
 809                 }
 810
 811 #if !NET_2_1
 812                 // Code Access Security
 813
 814                 internal void Resolve ()
 815                 {
 816                         lock (this) {
 817                                 // FIXME: As we (currently) delay the resolution until the first CAS
 818                                 // Demand it's too late to evaluate the Minimum permission set as a
 819                                 // condition to load the assembly into the AppDomain
 820                                 LoadAssemblyPermissions ();
 821                                 Evidence e = new Evidence (UnprotectedGetEvidence ()); // we need a copy to add PRE
 822                                 e.AddHost (new PermissionRequestEvidence (_minimum, _optional, _refuse));
 823                                 _granted = SecurityManager.ResolvePolicy (e,
 824                                         _minimum, _optional, _refuse, out _denied);
 825                         }
 826                 }
 827
 828                 internal PermissionSet GrantedPermissionSet {
 829                         get {
 830                                 if (_granted == null) {
 831                                         if (SecurityManager.ResolvingPolicyLevel != null) {
 832                                                 if (SecurityManager.ResolvingPolicyLevel.IsFullTrustAssembly (this))
 833                                                         return DefaultPolicies.FullTrust;
 834                                                 else
 835                                                         return null; // we can't resolve during resolution
 836                                         }
 837                                         Resolve ();
 838                                 }
 839                                 return _granted;
 840                         }
 841                 }
 842
 843                 internal PermissionSet DeniedPermissionSet {
 844                         get {
 845                                 // yes we look for granted, as denied may be null
 846                                 if (_granted == null) {
 847                                         if (SecurityManager.ResolvingPolicyLevel != null) {
 848                                                 if (SecurityManager.ResolvingPolicyLevel.IsFullTrustAssembly (this))
 849                                                         return null;
 850                                                 else
 851                                                         return DefaultPolicies.FullTrust; // deny unrestricted
 852                                         }
 853                                         Resolve ();
 854                                 }
 855                                 return _denied;
 856                         }
 857                 }
 858
 859                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 860                 extern internal static bool LoadPermissions (Assembly a,
 861                         ref IntPtr minimum, ref int minLength,
 862                         ref IntPtr optional, ref int optLength,
 863                         ref IntPtr refused, ref int refLength);
 864
 865                 // Support for SecurityAction.RequestMinimum, RequestOptional and RequestRefuse
 866                 private void LoadAssemblyPermissions ()
 867                 {
 868                         IntPtr minimum = IntPtr.Zero, optional = IntPtr.Zero, refused = IntPtr.Zero;
 869                         int minLength = 0, optLength = 0, refLength = 0;
 870                         if (LoadPermissions (this, ref minimum, ref minLength, ref optional,
 871                                 ref optLength, ref refused, ref refLength)) {
 872
 873                                 // Note: no need to cache these permission sets as they will only be created once
 874                                 // at assembly resolution time.
 875                                 if (minLength > 0) {
 876                                         byte[] data = new byte [minLength];
 877                                         Marshal.Copy (minimum, data, 0, minLength);
 878                                         _minimum = SecurityManager.Decode (data);
 879                                 }
 880                                 if (optLength > 0) {
 881                                         byte[] data = new byte [optLength];
 882                                         Marshal.Copy (optional, data, 0, optLength);
 883                                         _optional = SecurityManager.Decode (data);
 884                                 }
 885                                 if (refLength > 0) {
 886                                         byte[] data = new byte [refLength];
 887                                         Marshal.Copy (refused, data, 0, refLength);
 888                                         _refuse = SecurityManager.Decode (data);
 889                                 }
 890                         }
 891                 }
 892 #endif
 893
 894 #if NET_4_0
 895                 public virtual PermissionSet PermissionSet {
 896                         get { return this.GrantedPermissionSet; }
 897                 }
 898
 899                 public virtual SecurityRuleSet SecurityRuleSet {
 900                         get { throw CreateNIE (); }
 901                 }
 902 #endif
 903
 904 #if NET_4_0 || MOONLIGHT || MOBILE
 905                 static Exception CreateNIE ()
 906                 {
 907                         return new NotImplementedException ("Derived classes must implement it");
 908                 }
 909
 910                 public virtual IList<CustomAttributeData> GetCustomAttributesData ()
 911                 {
 912                         return CustomAttributeData.GetCustomAttributes (this);
 913                 }
 914
 915                 [MonoTODO]
 916                 public bool IsFullyTrusted {
 917                         get { return true; }
 918                 }
 919
 920                 public virtual Type GetType (string name, bool throwOnError, bool ignoreCase)
 921                 {
 922                         throw CreateNIE ();
 923                 }
 924
 925                 public virtual Module GetModule (String name)
 926                 {
 927                         throw CreateNIE ();
 928                 }
 929
 930                 public virtual AssemblyName[] GetReferencedAssemblies ()
 931                 {
 932                         throw CreateNIE ();
 933                 }
 934
 935                 public virtual Module[] GetModules (bool getResourceModules)
 936                 {
 937                         throw CreateNIE ();
 938                 }
 939
 940                 [MonoTODO ("Always returns the same as GetModules")]
 941                 public virtual Module[] GetLoadedModules (bool getResourceModules)
 942                 {
 943                         throw CreateNIE ();
 944                 }
 945
 946                 public virtual Assembly GetSatelliteAssembly (CultureInfo culture)
 947                 {
 948                         throw CreateNIE ();
 949                 }
 950
 951                 public virtual Assembly GetSatelliteAssembly (CultureInfo culture, Version version)
 952                 {
 953                         throw CreateNIE ();
 954                 }
 955
 956                 public virtual Module ManifestModule {
 957                         get { throw CreateNIE (); }
 958                 }
 959
 960                 public virtual bool GlobalAssemblyCache {
 961                         get { throw CreateNIE (); }
 962                 }
 963
 964                 public virtual bool IsDynamic {
 965                         get { return false; }
 966                 }
 967
 968                 public static bool operator == (Assembly left, Assembly right)
 969                 {
 970                         if ((object)left == (object)right)
 971                                 return true;
 972                         if ((object)left == null ^ (object)right == null)
 973                                 return false;
 974                         return left.Equals (right);
 975                 }
 976
 977                 public static bool operator != (Assembly left, Assembly right)
 978                 {
 979                         if ((object)left == (object)right)
 980                                 return false;
 981                         if ((object)left == null ^ (object)right == null)
 982                                 return true;
 983                         return !left.Equals (right);
 984                 }
 985 #endif
 986         }
 987 }