mcs/mcs/assembly.cs

   1 //
   2 // assembly.cs: Assembly declaration and specifications
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Marek Safar (marek.safar@gmail.com)
   7 //
   8 // Copyright 2001, 2002, 2003 Ximian, Inc.
   9 // Copyright 2004-2011 Novell, Inc.
  10 // Copyright 2011-2013 Xamarin Inc
  11 //
  12
  13
  14 using System;
  15 using System.IO;
  16 using System.Collections.Generic;
  17 using System.Globalization;
  18 using System.Security;
  19 using System.Security.Cryptography;
  20 using System.Security.Permissions;
  21 using Mono.Security.Cryptography;
  22 using Mono.CompilerServices.SymbolWriter;
  23
  24 #if STATIC
  25 using IKVM.Reflection;
  26 using IKVM.Reflection.Emit;
  27 using SecurityType = System.Collections.Generic.List<IKVM.Reflection.Emit.CustomAttributeBuilder>;
  28 #else
  29 using SecurityType = System.Collections.Generic.Dictionary<System.Security.Permissions.SecurityAction, System.Security.PermissionSet>;
  30 using System.Reflection;
  31 using System.Reflection.Emit;
  32 #endif
  33
  34 namespace Mono.CSharp
  35 {
  36         public interface IAssemblyDefinition
  37         {
  38                 string FullName { get; }
  39                 bool IsCLSCompliant { get; }
  40                 bool IsMissing { get; }
  41                 string Name { get; }
  42
  43                 byte[] GetPublicKeyToken ();
  44                 bool IsFriendAssemblyTo (IAssemblyDefinition assembly);
  45         }
  46
  47         public abstract class AssemblyDefinition : IAssemblyDefinition
  48         {
  49                 // TODO: make it private and move all builder based methods here
  50                 public AssemblyBuilder Builder;
  51                 protected AssemblyBuilderExtension builder_extra;
  52                 MonoSymbolFile symbol_writer;
  53
  54                 bool is_cls_compliant;
  55                 bool wrap_non_exception_throws;
  56                 bool wrap_non_exception_throws_custom;
  57                 bool has_user_debuggable;
  58
  59                 protected ModuleContainer module;
  60                 readonly string name;
  61                 protected readonly string file_name;
  62
  63                 byte[] public_key, public_key_token;
  64                 bool delay_sign;
  65
  66                 // Holds private/public key pair when private key
  67                 // was available
  68                 StrongNameKeyPair private_key;
  69
  70                 Attribute cls_attribute;
  71                 Method entry_point;
  72
  73                 protected List<ImportedModuleDefinition> added_modules;
  74                 SecurityType declarative_security;
  75                 Dictionary<ITypeDefinition, Attribute> emitted_forwarders;
  76                 AssemblyAttributesPlaceholder module_target_attrs;
  77
  78                 // Win32 version info values
  79                 string vi_product, vi_product_version, vi_company, vi_copyright, vi_trademark;
  80
  81                 protected AssemblyDefinition (ModuleContainer module, string name)
  82                 {
  83                         this.module = module;
  84                         this.name = Path.GetFileNameWithoutExtension (name);
  85
  86                         wrap_non_exception_throws = true;
  87
  88                         delay_sign = Compiler.Settings.StrongNameDelaySign;
  89
  90                         //
  91                         // Load strong name key early enough for assembly importer to be able to
  92                         // use the keys for InternalsVisibleTo
  93                         // This should go somewhere close to ReferencesLoading but don't have the place yet
  94                         //
  95                         if (Compiler.Settings.HasKeyFileOrContainer) {
  96                                 LoadPublicKey (Compiler.Settings.StrongNameKeyFile, Compiler.Settings.StrongNameKeyContainer);
  97                         }
  98                 }
  99
 100                 protected AssemblyDefinition (ModuleContainer module, string name, string fileName)
 101                         : this (module, name)
 102                 {
 103                         this.file_name = fileName;
 104                 }
 105
 106                 #region Properties
 107
 108                 public Attribute CLSCompliantAttribute {
 109                         get {
 110                                 return cls_attribute;
 111                         }
 112                 }
 113
 114                 public CompilerContext Compiler {
 115                         get {
 116                                 return module.Compiler;
 117                         }
 118                 }
 119
 120                 //
 121                 // Assembly entry point, aka Main method
 122                 //
 123                 public Method EntryPoint {
 124                         get {
 125                                 return entry_point;
 126                         }
 127                         set {
 128                                 entry_point = value;
 129                         }
 130                 }
 131
 132                 public string FullName {
 133                         get {
 134                                 return Builder.FullName;
 135                         }
 136                 }
 137
 138                 public bool HasCLSCompliantAttribute {
 139                         get {
 140                                 return cls_attribute != null;
 141                         }
 142                 }
 143
 144                 // TODO: This should not exist here but will require more changes
 145                 public MetadataImporter Importer {
 146                     get; set;
 147                 }
 148
 149                 public bool IsCLSCompliant {
 150                         get {
 151                                 return is_cls_compliant;
 152                         }
 153                 }
 154
 155                 bool IAssemblyDefinition.IsMissing {
 156                         get {
 157                                 return false;
 158                         }
 159                 }
 160
 161                 public bool IsSatelliteAssembly { get; private set; }
 162
 163                 public string Name {
 164                         get {
 165                                 return name;
 166                         }
 167                 }
 168
 169                 public bool WrapNonExceptionThrows {
 170                         get {
 171                                 return wrap_non_exception_throws;
 172                         }
 173                 }
 174
 175                 protected Report Report {
 176                         get {
 177                                 return Compiler.Report;
 178                         }
 179                 }
 180
 181                 public MonoSymbolFile SymbolWriter {
 182                         get {
 183                                 return symbol_writer;
 184                         }
 185                 }
 186
 187                 #endregion
 188
 189                 public void AddModule (ImportedModuleDefinition module)
 190                 {
 191                         if (added_modules == null) {
 192                                 added_modules = new List<ImportedModuleDefinition> ();
 193                                 added_modules.Add (module);
 194                         }
 195                 }
 196
 197                 public void ApplyAttributeBuilder (Attribute a, MethodSpec ctor, byte[] cdata, PredefinedAttributes pa)
 198                 {
 199                         if (a.IsValidSecurityAttribute ()) {
 200                                 a.ExtractSecurityPermissionSet (ctor, ref declarative_security);
 201                                 return;
 202                         }
 203
 204                         if (a.Type == pa.AssemblyCulture) {
 205                                 string value = a.GetString ();
 206                                 if (value == null || value.Length == 0)
 207                                         return;
 208
 209                                 if (Compiler.Settings.Target == Target.Exe) {
 210                                         a.Error_AttributeEmitError ("The executables cannot be satelite assemblies, remove the attribute or keep it empty");
 211                                         return;
 212                                 }
 213
 214                                 if (value == "neutral")
 215                                         value = "";
 216
 217                                 if (Compiler.Settings.Target == Target.Module) {
 218                                         SetCustomAttribute (ctor, cdata);
 219                                 } else {
 220                                         builder_extra.SetCulture (value, a.Location);
 221                                 }
 222
 223                                 IsSatelliteAssembly = true;
 224                                 return;
 225                         }
 226
 227                         if (a.Type == pa.AssemblyVersion) {
 228                                 string value = a.GetString ();
 229                                 if (value == null || value.Length == 0)
 230                                         return;
 231
 232                                 var vinfo = IsValidAssemblyVersion (value, true);
 233                                 if (vinfo == null) {
 234                                         a.Error_AttributeEmitError (string.Format ("Specified version `{0}' is not valid", value));
 235                                         return;
 236                                 }
 237
 238                                 if (Compiler.Settings.Target == Target.Module) {
 239                                         SetCustomAttribute (ctor, cdata);
 240                                 } else {
 241                                         builder_extra.SetVersion (vinfo, a.Location);
 242                                 }
 243
 244                                 return;
 245                         }
 246
 247                         if (a.Type == pa.AssemblyAlgorithmId) {
 248                                 const int pos = 2; // skip CA header
 249                                 uint alg = (uint) cdata [pos];
 250                                 alg |= ((uint) cdata [pos + 1]) << 8;
 251                                 alg |= ((uint) cdata [pos + 2]) << 16;
 252                                 alg |= ((uint) cdata [pos + 3]) << 24;
 253
 254                                 if (Compiler.Settings.Target == Target.Module) {
 255                                         SetCustomAttribute (ctor, cdata);
 256                                 } else {
 257                                         builder_extra.SetAlgorithmId (alg, a.Location);
 258                                 }
 259
 260                                 return;
 261                         }
 262
 263                         if (a.Type == pa.AssemblyFlags) {
 264                                 const int pos = 2; // skip CA header
 265                                 uint flags = (uint) cdata[pos];
 266                                 flags |= ((uint) cdata [pos + 1]) << 8;
 267                                 flags |= ((uint) cdata [pos + 2]) << 16;
 268                                 flags |= ((uint) cdata [pos + 3]) << 24;
 269
 270                                 // Ignore set PublicKey flag if assembly is not strongnamed
 271                                 if ((flags & (uint) AssemblyNameFlags.PublicKey) != 0 && public_key == null)
 272                                         flags &= ~(uint) AssemblyNameFlags.PublicKey;
 273
 274                                 if (Compiler.Settings.Target == Target.Module) {
 275                                         SetCustomAttribute (ctor, cdata);
 276                                 } else {
 277                                         builder_extra.SetFlags (flags, a.Location);
 278                                 }
 279
 280                                 return;
 281                         }
 282
 283                         if (a.Type == pa.TypeForwarder) {
 284                                 TypeSpec t = a.GetArgumentType ();
 285                                 if (t == null || TypeManager.HasElementType (t)) {
 286                                         Report.Error (735, a.Location, "Invalid type specified as an argument for TypeForwardedTo attribute");
 287                                         return;
 288                                 }
 289
 290                                 if (emitted_forwarders == null) {
 291                                         emitted_forwarders = new Dictionary<ITypeDefinition, Attribute> ();
 292                                 } else if (emitted_forwarders.ContainsKey (t.MemberDefinition)) {
 293                                         Report.SymbolRelatedToPreviousError (emitted_forwarders[t.MemberDefinition].Location, null);
 294                                         Report.Error (739, a.Location, "A duplicate type forward of type `{0}'",
 295                                                 t.GetSignatureForError ());
 296                                         return;
 297                                 }
 298
 299                                 emitted_forwarders.Add (t.MemberDefinition, a);
 300
 301                                 if (t.MemberDefinition.DeclaringAssembly == this) {
 302                                         Report.SymbolRelatedToPreviousError (t);
 303                                         Report.Error (729, a.Location, "Cannot forward type `{0}' because it is defined in this assembly",
 304                                                 t.GetSignatureForError ());
 305                                         return;
 306                                 }
 307
 308                                 if (t.IsNested) {
 309                                         Report.Error (730, a.Location, "Cannot forward type `{0}' because it is a nested type",
 310                                                 t.GetSignatureForError ());
 311                                         return;
 312                                 }
 313
 314                                 builder_extra.AddTypeForwarder (t.GetDefinition (), a.Location);
 315                                 return;
 316                         }
 317
 318                         if (a.Type == pa.Extension) {
 319                                 a.Error_MisusedExtensionAttribute ();
 320                                 return;
 321                         }
 322
 323                         if (a.Type == pa.InternalsVisibleTo) {
 324                                 string assembly_name = a.GetString ();
 325                                 if (assembly_name.Length == 0)
 326                                         return;
 327 #if STATIC
 328                                 ParsedAssemblyName aname;
 329                                 ParseAssemblyResult r = Fusion.ParseAssemblyName (assembly_name, out aname);
 330                                 if (r != ParseAssemblyResult.OK) {
 331                                         Report.Warning (1700, 3, a.Location, "Assembly reference `{0}' is invalid and cannot be resolved",
 332                                                 assembly_name);
 333                                         return;
 334                                 }
 335
 336                                 if (aname.Version != null || aname.Culture != null || aname.ProcessorArchitecture != ProcessorArchitecture.None) {
 337                                         Report.Error (1725, a.Location,
 338                                                 "Friend assembly reference `{0}' is invalid. InternalsVisibleTo declarations cannot have a version, culture or processor architecture specified",
 339                                                 assembly_name);
 340
 341                                         return;
 342                                 }
 343
 344                                 if (public_key != null && !aname.HasPublicKey) {
 345                                         Report.Error (1726, a.Location,
 346                                                 "Friend assembly reference `{0}' is invalid. Strong named assemblies must specify a public key in their InternalsVisibleTo declarations",
 347                                                 assembly_name);
 348                                         return;
 349                                 }
 350 #endif
 351                         } else if (a.Type == pa.RuntimeCompatibility) {
 352                                 wrap_non_exception_throws_custom = true;
 353                         } else if (a.Type == pa.AssemblyFileVersion) {
 354                                 vi_product_version = a.GetString ();
 355                                 if (string.IsNullOrEmpty (vi_product_version) || IsValidAssemblyVersion (vi_product_version, false) == null) {
 356                                         Report.Warning (1607, 1, a.Location, "The version number `{0}' specified for `{1}' is invalid",
 357                                                 vi_product_version, a.Name);
 358                                         return;
 359                                 }
 360                         } else if (a.Type == pa.AssemblyProduct) {
 361                                 vi_product = a.GetString ();
 362                         } else if (a.Type == pa.AssemblyCompany) {
 363                                 vi_company = a.GetString ();
 364                         } else if (a.Type == pa.AssemblyDescription) {
 365                                 // TODO: Needs extra api
 366                         } else if (a.Type == pa.AssemblyCopyright) {
 367                                 vi_copyright = a.GetString ();
 368                         } else if (a.Type == pa.AssemblyTrademark) {
 369                                 vi_trademark = a.GetString ();
 370                         } else if (a.Type == pa.Debuggable) {
 371                                 has_user_debuggable = true;
 372                         }
 373
 374                         SetCustomAttribute (ctor, cdata);
 375                 }
 376
 377                 //
 378                 // When using assembly public key attributes InternalsVisibleTo key
 379                 // was not checked, we have to do it later when we actually know what
 380                 // our public key token is
 381                 //
 382                 void CheckReferencesPublicToken ()
 383                 {
 384                         // TODO: It should check only references assemblies but there is
 385                         // no working SRE API
 386                         foreach (var entry in Importer.Assemblies) {
 387                                 var a = entry as ImportedAssemblyDefinition;
 388                                 if (a == null || a.IsMissing)
 389                                         continue;
 390
 391                                 if (public_key != null && !a.HasStrongName) {
 392                                         Report.Error (1577, "Referenced assembly `{0}' does not have a strong name",
 393                                                 a.FullName);
 394                                 }
 395
 396                                 var ci = a.Assembly.GetName ().CultureInfo;
 397                                 if (!ci.Equals (System.Globalization.CultureInfo.InvariantCulture)) {
 398                                         Report.Warning (1607, 1, "Referenced assembly `{0}' has different culture setting of `{1}'",
 399                                                 a.Name, ci.Name);
 400                                 }
 401
 402                                 if (!a.IsFriendAssemblyTo (this))
 403                                         continue;
 404
 405                                 var attr = a.GetAssemblyVisibleToName (this);
 406                                 var atoken = attr.GetPublicKeyToken ();
 407
 408                                 if (ArrayComparer.IsEqual (GetPublicKeyToken (), atoken))
 409                                         continue;
 410
 411                                 Report.SymbolRelatedToPreviousError (a.Location);
 412                                 Report.Error (281,
 413                                         "Friend access was granted to `{0}', but the output assembly is named `{1}'. Try adding a reference to `{0}' or change the output assembly name to match it",
 414                                         attr.FullName, FullName);
 415                         }
 416                 }
 417
 418                 protected AssemblyName CreateAssemblyName ()
 419                 {
 420                         var an = new AssemblyName (name);
 421
 422                         if (public_key != null && Compiler.Settings.Target != Target.Module) {
 423                                 if (delay_sign) {
 424                                         an.SetPublicKey (public_key);
 425                                 } else {
 426                                         if (public_key.Length == 16) {
 427                                                 Report.Error (1606, "Could not sign the assembly. ECMA key can only be used to delay-sign assemblies");
 428                                         } else if (private_key == null) {
 429                                                 Error_AssemblySigning ("The specified key file does not have a private key");
 430                                         } else {
 431                                                 an.KeyPair = private_key;
 432                                         }
 433                                 }
 434                         }
 435
 436                         return an;
 437                 }
 438
 439                 public virtual ModuleBuilder CreateModuleBuilder ()
 440                 {
 441                         if (file_name == null)
 442                                 throw new NotSupportedException ("transient module in static assembly");
 443
 444                         var module_name = Path.GetFileName (file_name);
 445
 446                         // Always initialize module without symbolInfo. We could be framework dependent
 447                         // but returned ISymbolWriter does not have all what we need therefore some
 448                         // adaptor will be needed for now we alwayas emit MDB format when generating
 449                         // debug info
 450                         return Builder.DefineDynamicModule (module_name, module_name, false);
 451                 }
 452
 453                 public virtual void Emit ()
 454                 {
 455                         if (Compiler.Settings.Target == Target.Module) {
 456                                 module_target_attrs = new AssemblyAttributesPlaceholder (module, name);
 457                                 module_target_attrs.CreateContainer ();
 458                                 module_target_attrs.DefineContainer ();
 459                                 module_target_attrs.Define ();
 460                                 module.AddCompilerGeneratedClass (module_target_attrs);
 461                         } else if (added_modules != null) {
 462                                 ReadModulesAssemblyAttributes ();
 463                         }
 464
 465                         if (Compiler.Settings.GenerateDebugInfo) {
 466                                 symbol_writer = new MonoSymbolFile ();
 467                         }
 468
 469                         module.EmitContainer ();
 470
 471                         if (module.HasExtensionMethod) {
 472                                 var pa = module.PredefinedAttributes.Extension;
 473                                 if (pa.IsDefined) {
 474                                         SetCustomAttribute (pa.Constructor, AttributeEncoder.Empty);
 475                                 }
 476                         }
 477
 478                         if (!IsSatelliteAssembly) {
 479                                 if (!has_user_debuggable && Compiler.Settings.GenerateDebugInfo) {
 480                                         var pa = module.PredefinedAttributes.Debuggable;
 481                                         if (pa.IsDefined) {
 482                                                 var modes = System.Diagnostics.DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints;
 483                                                 if (!Compiler.Settings.Optimize)
 484                                                         modes |= System.Diagnostics.DebuggableAttribute.DebuggingModes.DisableOptimizations;
 485
 486                                                 pa.EmitAttribute (Builder, modes);
 487                                         }
 488                                 }
 489
 490                                 if (!wrap_non_exception_throws_custom) {
 491                                         PredefinedAttribute pa = module.PredefinedAttributes.RuntimeCompatibility;
 492                                         if (pa.IsDefined && pa.ResolveBuilder ()) {
 493                                                 var prop = module.PredefinedMembers.RuntimeCompatibilityWrapNonExceptionThrows.Get ();
 494                                                 if (prop != null) {
 495                                                         AttributeEncoder encoder = new AttributeEncoder ();
 496                                                         encoder.EncodeNamedPropertyArgument (prop, new BoolLiteral (Compiler.BuiltinTypes, true, Location.Null));
 497                                                         SetCustomAttribute (pa.Constructor, encoder.ToArray ());
 498                                                 }
 499                                         }
 500                                 }
 501
 502                                 if (declarative_security != null) {
 503 #if STATIC
 504                                         foreach (var entry in declarative_security) {
 505                                                 Builder.__AddDeclarativeSecurity (entry);
 506                                         }
 507 #else
 508                                         throw new NotSupportedException ("Assembly-level security");
 509 #endif
 510                                 }
 511                         }
 512
 513                         CheckReferencesPublicToken ();
 514
 515                         SetEntryPoint ();
 516                 }
 517
 518                 public byte[] GetPublicKeyToken ()
 519                 {
 520                         if (public_key == null || public_key_token != null)
 521                                 return public_key_token;
 522
 523                         HashAlgorithm ha = SHA1.Create ();
 524                         byte[] hash = ha.ComputeHash (public_key);
 525                         // we need the last 8 bytes in reverse order
 526                         public_key_token = new byte[8];
 527                         Buffer.BlockCopy (hash, hash.Length - 8, public_key_token, 0, 8);
 528                         Array.Reverse (public_key_token, 0, 8);
 529                         return public_key_token;
 530                 }
 531
 532                 //
 533                 // Either keyFile or keyContainer has to be non-null
 534                 //
 535                 void LoadPublicKey (string keyFile, string keyContainer)
 536                 {
 537                         if (keyContainer != null) {
 538                                 try {
 539                                         private_key = new StrongNameKeyPair (keyContainer);
 540                                         public_key = private_key.PublicKey;
 541                                 } catch {
 542                                         Error_AssemblySigning ("The specified key container `" + keyContainer + "' does not exist");
 543                                 }
 544
 545                                 return;
 546                         }
 547
 548                         bool key_file_exists = File.Exists (keyFile);
 549
 550                         //
 551                         // For attribute based KeyFile do additional lookup
 552                         // in output assembly path
 553                         //
 554                         if (!key_file_exists && Compiler.Settings.StrongNameKeyFile == null) {
 555                                 //
 556                                 // The key file can be relative to output assembly
 557                                 //
 558                                 string test_path = Path.Combine (Path.GetDirectoryName (file_name), keyFile);
 559                                 key_file_exists = File.Exists (test_path);
 560                                 if (key_file_exists)
 561                                         keyFile = test_path;
 562                         }
 563
 564                         if (!key_file_exists) {
 565                                 Error_AssemblySigning ("The specified key file `" + keyFile + "' does not exist");
 566                                 return;
 567                         }
 568
 569                         using (FileStream fs = new FileStream (keyFile, FileMode.Open, FileAccess.Read)) {
 570                                 byte[] snkeypair = new byte[fs.Length];
 571                                 fs.Read (snkeypair, 0, snkeypair.Length);
 572
 573                                 // check for ECMA key
 574                                 if (snkeypair.Length == 16) {
 575                                         public_key = snkeypair;
 576                                         return;
 577                                 }
 578
 579                                 try {
 580                                         // take it, with or without, a private key
 581                                         RSA rsa = CryptoConvert.FromCapiKeyBlob (snkeypair);
 582                                         // and make sure we only feed the public part to Sys.Ref
 583                                         byte[] publickey = CryptoConvert.ToCapiPublicKeyBlob (rsa);
 584
 585                                         // AssemblyName.SetPublicKey requires an additional header
 586                                         byte[] publicKeyHeader = new byte[8] { 0x00, 0x24, 0x00, 0x00, 0x04, 0x80, 0x00, 0x00 };
 587
 588                                         // Encode public key
 589                                         public_key = new byte[12 + publickey.Length];
 590                                         Buffer.BlockCopy (publicKeyHeader, 0, public_key, 0, publicKeyHeader.Length);
 591
 592                                         // Length of Public Key (in bytes)
 593                                         int lastPart = public_key.Length - 12;
 594                                         public_key[8] = (byte) (lastPart & 0xFF);
 595                                         public_key[9] = (byte) ((lastPart >> 8) & 0xFF);
 596                                         public_key[10] = (byte) ((lastPart >> 16) & 0xFF);
 597                                         public_key[11] = (byte) ((lastPart >> 24) & 0xFF);
 598
 599                                         Buffer.BlockCopy (publickey, 0, public_key, 12, publickey.Length);
 600                                 } catch {
 601                                         Error_AssemblySigning ("The specified key file `" + keyFile + "' has incorrect format");
 602                                         return;
 603                                 }
 604
 605                                 if (delay_sign)
 606                                         return;
 607
 608                                 try {
 609                                         // TODO: Is there better way to test for a private key presence ?
 610                                         CryptoConvert.FromCapiPrivateKeyBlob (snkeypair);
 611                                         private_key = new StrongNameKeyPair (snkeypair);
 612                                 } catch { }
 613                         }
 614                 }
 615
 616                 void ReadModulesAssemblyAttributes ()
 617                 {
 618                         foreach (var m in added_modules) {
 619                                 var cattrs = m.ReadAssemblyAttributes ();
 620                                 if (cattrs == null)
 621                                         continue;
 622
 623                                 module.OptAttributes.AddAttributes (cattrs);
 624                         }
 625                 }
 626
 627                 public void Resolve ()
 628                 {
 629                         if (Compiler.Settings.Unsafe && module.PredefinedTypes.SecurityAction.Define ()) {
 630                                 //
 631                                 // Emits [assembly: SecurityPermissionAttribute (SecurityAction.RequestMinimum, SkipVerification = true)]
 632                                 // when -unsafe option was specified
 633                                 //
 634                                 Location loc = Location.Null;
 635
 636                                 MemberAccess system_security_permissions = new MemberAccess (new MemberAccess (
 637                                         new QualifiedAliasMember (QualifiedAliasMember.GlobalAlias, "System", loc), "Security", loc), "Permissions", loc);
 638
 639                                 var req_min = module.PredefinedMembers.SecurityActionRequestMinimum.Resolve (loc);
 640
 641                                 Arguments pos = new Arguments (1);
 642                                 pos.Add (new Argument (req_min.GetConstant (null)));
 643
 644                                 Arguments named = new Arguments (1);
 645                                 named.Add (new NamedArgument ("SkipVerification", loc, new BoolLiteral (Compiler.BuiltinTypes, true, loc)));
 646
 647                                 Attribute g = new Attribute ("assembly",
 648                                         new MemberAccess (system_security_permissions, "SecurityPermissionAttribute"),
 649                                         new Arguments[] { pos, named }, loc, false);
 650                                 g.AttachTo (module, module);
 651
 652                                 // Disable no-location warnings (e.g. obsolete) for compiler generated attribute
 653                                 Compiler.Report.DisableReporting ();
 654                                 try {
 655                                         var ctor = g.Resolve ();
 656                                         if (ctor != null) {
 657                                                 g.ExtractSecurityPermissionSet (ctor, ref declarative_security);
 658                                         }
 659                                 } finally {
 660                                         Compiler.Report.EnableReporting ();
 661                                 }
 662                         }
 663
 664                         if (module.OptAttributes == null)
 665                                 return;
 666
 667                         // Ensure that we only have GlobalAttributes, since the Search isn't safe with other types.
 668                         if (!module.OptAttributes.CheckTargets())
 669                                 return;
 670
 671                         cls_attribute = module.ResolveAssemblyAttribute (module.PredefinedAttributes.CLSCompliant);
 672
 673                         if (cls_attribute != null) {
 674                                 is_cls_compliant = cls_attribute.GetClsCompliantAttributeValue ();
 675                         }
 676
 677                         if (added_modules != null && Compiler.Settings.VerifyClsCompliance && is_cls_compliant) {
 678                                 foreach (var m in added_modules) {
 679                                         if (!m.IsCLSCompliant) {
 680                                                 Report.Error (3013,
 681                                                         "Added modules must be marked with the CLSCompliant attribute to match the assembly",
 682                                                         m.Name);
 683                                         }
 684                                 }
 685                         }
 686
 687                         Attribute a = module.ResolveAssemblyAttribute (module.PredefinedAttributes.RuntimeCompatibility);
 688                         if (a != null) {
 689                                 var val = a.GetNamedValue ("WrapNonExceptionThrows") as BoolConstant;
 690                                 if (val != null)
 691                                         wrap_non_exception_throws = val.Value;
 692                         }
 693                 }
 694
 695                 protected void ResolveAssemblySecurityAttributes ()
 696                 {
 697                         string key_file = null;
 698                         string key_container = null;
 699
 700                         if (module.OptAttributes != null) {
 701                                 foreach (Attribute a in module.OptAttributes.Attrs) {
 702                                         // cannot rely on any resolve-based members before you call Resolve
 703                                         if (a.ExplicitTarget != "assembly")
 704                                                 continue;
 705
 706                                         // TODO: This code is buggy: comparing Attribute name without resolving is wrong.
 707                                         //       However, this is invoked by CodeGen.Init, when none of the namespaces
 708                                         //       are loaded yet.
 709                                         // TODO: Does not handle quoted attributes properly
 710                                         switch (a.Name) {
 711                                         case "AssemblyKeyFile":
 712                                         case "AssemblyKeyFileAttribute":
 713                                         case "System.Reflection.AssemblyKeyFileAttribute":
 714                                                 if (Compiler.Settings.StrongNameKeyFile != null) {
 715                                                         Report.SymbolRelatedToPreviousError (a.Location, a.GetSignatureForError ());
 716                                                         Report.Warning (1616, 1, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
 717                                                                         "keyfile", "System.Reflection.AssemblyKeyFileAttribute");
 718                                                 } else {
 719                                                         string value = a.GetString ();
 720                                                         if (!string.IsNullOrEmpty (value)) {
 721                                                                 Error_ObsoleteSecurityAttribute (a, "keyfile");
 722                                                                 key_file = value;
 723                                                         }
 724                                                 }
 725                                                 break;
 726                                         case "AssemblyKeyName":
 727                                         case "AssemblyKeyNameAttribute":
 728                                         case "System.Reflection.AssemblyKeyNameAttribute":
 729                                                 if (Compiler.Settings.StrongNameKeyContainer != null) {
 730                                                         Report.SymbolRelatedToPreviousError (a.Location, a.GetSignatureForError ());
 731                                                         Report.Warning (1616, 1, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
 732                                                                         "keycontainer", "System.Reflection.AssemblyKeyNameAttribute");
 733                                                 } else {
 734                                                         string value = a.GetString ();
 735                                                         if (!string.IsNullOrEmpty (value)) {
 736                                                                 Error_ObsoleteSecurityAttribute (a, "keycontainer");
 737                                                                 key_container = value;
 738                                                         }
 739                                                 }
 740                                                 break;
 741                                         case "AssemblyDelaySign":
 742                                         case "AssemblyDelaySignAttribute":
 743                                         case "System.Reflection.AssemblyDelaySignAttribute":
 744                                                 bool b = a.GetBoolean ();
 745                                                 if (b) {
 746                                                         Error_ObsoleteSecurityAttribute (a, "delaysign");
 747                                                 }
 748
 749                                                 delay_sign = b;
 750                                                 break;
 751                                         }
 752                                 }
 753                         }
 754
 755                         // We came here only to report assembly attributes warnings
 756                         if (public_key != null)
 757                                 return;
 758
 759                         //
 760                         // Load the strong key file found in attributes when no
 761                         // command line key was given
 762                         //
 763                         if (key_file != null || key_container != null) {
 764                                 LoadPublicKey (key_file, key_container);
 765                         } else if (delay_sign) {
 766                                 Report.Warning (1607, 1, "Delay signing was requested but no key file was given");
 767                         }
 768                 }
 769
 770                 public void EmbedResources ()
 771                 {
 772                         //
 773                         // Add Win32 resources
 774                         //
 775                         if (Compiler.Settings.Win32ResourceFile != null) {
 776                                 Builder.DefineUnmanagedResource (Compiler.Settings.Win32ResourceFile);
 777                         } else {
 778                                 Builder.DefineVersionInfoResource (vi_product, vi_product_version, vi_company, vi_copyright, vi_trademark);
 779                         }
 780
 781                         if (Compiler.Settings.Win32IconFile != null) {
 782                                 builder_extra.DefineWin32IconResource (Compiler.Settings.Win32IconFile);
 783                         }
 784
 785                         if (Compiler.Settings.Resources != null) {
 786                                 if (Compiler.Settings.Target == Target.Module) {
 787                                         Report.Error (1507, "Cannot link resource file when building a module");
 788                                 } else {
 789                                         int counter = 0;
 790                                         foreach (var res in Compiler.Settings.Resources) {
 791                                                 if (!File.Exists (res.FileName)) {
 792                                                         Report.Error (1566, "Error reading resource file `{0}'", res.FileName);
 793                                                         continue;
 794                                                 }
 795
 796                                                 if (res.IsEmbeded) {
 797                                                         Stream stream;
 798                                                         if (counter++ < 10) {
 799                                                                 stream = File.OpenRead (res.FileName);
 800                                                         } else {
 801                                                                 // TODO: SRE API requires resource stream to be available during AssemblyBuilder::Save
 802                                                                 // we workaround it by reading everything into memory to compile projects with
 803                                                                 // many embedded resource (over 3500) references
 804                                                                 stream = new MemoryStream (File.ReadAllBytes (res.FileName));
 805                                                         }
 806
 807                                                         module.Builder.DefineManifestResource (res.Name, stream, res.Attributes);
 808                                                 } else {
 809                                                         Builder.AddResourceFile (res.Name, Path.GetFileName (res.FileName), res.Attributes);
 810                                                 }
 811                                         }
 812                                 }
 813                         }
 814                 }
 815
 816                 public void Save ()
 817                 {
 818                         PortableExecutableKinds pekind = PortableExecutableKinds.ILOnly;
 819                         ImageFileMachine machine;
 820
 821                         switch (Compiler.Settings.Platform) {
 822                         case Platform.X86:
 823                                 pekind |= PortableExecutableKinds.Required32Bit;
 824                                 machine = ImageFileMachine.I386;
 825                                 break;
 826                         case Platform.X64:
 827                                 pekind |= PortableExecutableKinds.PE32Plus;
 828                                 machine = ImageFileMachine.AMD64;
 829                                 break;
 830                         case Platform.IA64:
 831                                 machine = ImageFileMachine.IA64;
 832                                 break;
 833                         case Platform.AnyCPU32Preferred:
 834 #if STATIC
 835                                 pekind |= PortableExecutableKinds.Preferred32Bit;
 836                                 machine = ImageFileMachine.I386;
 837                                 break;
 838 #else
 839                                 throw new NotSupportedException ();
 840 #endif
 841                         case Platform.Arm:
 842 #if STATIC
 843                                 machine = ImageFileMachine.ARM;
 844                                 break;
 845 #else
 846                                 throw new NotSupportedException ();
 847 #endif
 848                         case Platform.AnyCPU:
 849                         default:
 850                                 machine = ImageFileMachine.I386;
 851                                 break;
 852                         }
 853
 854                         Compiler.TimeReporter.Start (TimeReporter.TimerType.OutputSave);
 855                         try {
 856                                 if (Compiler.Settings.Target == Target.Module) {
 857                                         SaveModule (pekind, machine);
 858                                 } else {
 859                                         Builder.Save (module.Builder.ScopeName, pekind, machine);
 860                                 }
 861                         } catch (Exception e) {
 862                                 Report.Error (16, "Could not write to file `" + name + "', cause: " + e.Message);
 863                         }
 864                         Compiler.TimeReporter.Stop (TimeReporter.TimerType.OutputSave);
 865
 866                         // Save debug symbols file
 867                         if (symbol_writer != null && Compiler.Report.Errors == 0) {
 868                                 // TODO: it should run in parallel
 869                                 Compiler.TimeReporter.Start (TimeReporter.TimerType.DebugSave);
 870
 871                                 var filename = file_name + ".mdb";
 872                                 try {
 873                                         // We mmap the file, so unlink the previous version since it may be in use
 874                                         File.Delete (filename);
 875                                 } catch {
 876                                         // We can safely ignore
 877                                 }
 878
 879                                 module.WriteDebugSymbol (symbol_writer);
 880
 881                                 using (FileStream fs = new FileStream (filename, FileMode.Create, FileAccess.Write)) {
 882                                         symbol_writer.CreateSymbolFile (module.Builder.ModuleVersionId, fs);
 883                                 }
 884
 885                                 Compiler.TimeReporter.Stop (TimeReporter.TimerType.DebugSave);
 886                         }
 887                 }
 888
 889                 protected virtual void SaveModule (PortableExecutableKinds pekind, ImageFileMachine machine)
 890                 {
 891                         Report.RuntimeMissingSupport (Location.Null, "-target:module");
 892                 }
 893
 894                 void SetCustomAttribute (MethodSpec ctor, byte[] data)
 895                 {
 896                         if (module_target_attrs != null)
 897                                 module_target_attrs.AddAssemblyAttribute (ctor, data);
 898                         else
 899                                 Builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), data);
 900                 }
 901
 902                 void SetEntryPoint ()
 903                 {
 904                         if (!Compiler.Settings.NeedsEntryPoint) {
 905                                 if (Compiler.Settings.MainClass != null)
 906                                         Report.Error (2017, "Cannot specify -main if building a module or library");
 907
 908                                 return;
 909                         }
 910
 911                         PEFileKinds file_kind;
 912
 913                         switch (Compiler.Settings.Target) {
 914                         case Target.Library:
 915                         case Target.Module:
 916                                 file_kind = PEFileKinds.Dll;
 917                                 break;
 918                         case Target.WinExe:
 919                                 file_kind = PEFileKinds.WindowApplication;
 920                                 break;
 921                         default:
 922                                 file_kind = PEFileKinds.ConsoleApplication;
 923                                 break;
 924                         }
 925
 926                         if (entry_point == null) {
 927                                 string main_class = Compiler.Settings.MainClass;
 928                                 if (main_class != null) {
 929                                         // TODO: Handle dotted names
 930                                         var texpr = module.GlobalRootNamespace.LookupType (module, main_class, 0, LookupMode.Probing, Location.Null);
 931                                         if (texpr == null) {
 932                                                 Report.Error (1555, "Could not find `{0}' specified for Main method", main_class);
 933                                                 return;
 934                                         }
 935
 936                                         var mtype = texpr.MemberDefinition as ClassOrStruct;
 937                                         if (mtype == null) {
 938                                                 Report.Error (1556, "`{0}' specified for Main method must be a valid class or struct", main_class);
 939                                                 return;
 940                                         }
 941
 942                                         Report.Error (1558, mtype.Location, "`{0}' does not have a suitable static Main method", mtype.GetSignatureForError ());
 943                                 } else {
 944                                         string pname = file_name == null ? name : Path.GetFileName (file_name);
 945                                         Report.Error (5001, "Program `{0}' does not contain a static `Main' method suitable for an entry point",
 946                                                 pname);
 947                                 }
 948
 949                                 return;
 950                         }
 951
 952                         Builder.SetEntryPoint (entry_point.MethodBuilder, file_kind);
 953                 }
 954
 955                 void Error_ObsoleteSecurityAttribute (Attribute a, string option)
 956                 {
 957                         Report.Warning (1699, 1, a.Location,
 958                                 "Use compiler option `{0}' or appropriate project settings instead of `{1}' attribute",
 959                                 option, a.Name);
 960                 }
 961
 962                 void Error_AssemblySigning (string text)
 963                 {
 964                         Report.Error (1548, "Error during assembly signing. " + text);
 965                 }
 966
 967                 public bool IsFriendAssemblyTo (IAssemblyDefinition assembly)
 968                 {
 969                         return false;
 970                 }
 971
 972                 static Version IsValidAssemblyVersion (string version, bool allowGenerated)
 973                 {
 974                         string[] parts = version.Split ('.');
 975                         if (parts.Length < 1 || parts.Length > 4)
 976                                 return null;
 977
 978                         var values = new int[4];
 979                         for (int i = 0; i < parts.Length; ++i) {
 980                                 if (!int.TryParse (parts[i], out values[i])) {
 981                                         if (parts[i].Length == 1 && parts[i][0] == '*' && allowGenerated) {
 982                                                 if (i == 2) {
 983                                                         // Nothing can follow *
 984                                                         if (parts.Length > 3)
 985                                                                 return null;
 986
 987                                                         // Generate Build value based on days since 1/1/2000
 988                                                         TimeSpan days = DateTime.Today - new DateTime (2000, 1, 1);
 989                                                         values[i] = System.Math.Max (days.Days, 0);
 990                                                         i = 3;
 991                                                 }
 992
 993                                                 if (i == 3) {
 994                                                         // Generate Revision value based on every other second today
 995                                                         var seconds = DateTime.Now - DateTime.Today;
 996                                                         values[i] = (int) seconds.TotalSeconds / 2;
 997                                                         continue;
 998                                                 }
 999                                         }
1000
1001                                         return null;
1002                                 }
1003
1004                                 if (values[i] > ushort.MaxValue)
1005                                         return null;
1006                         }
1007
1008                         return new Version (values[0], values[1], values[2], values[3]);
1009                 }
1010         }
1011
1012         public class AssemblyResource : IEquatable<AssemblyResource>
1013         {
1014                 public AssemblyResource (string fileName, string name)
1015                         : this (fileName, name, false)
1016                 {
1017                 }
1018
1019                 public AssemblyResource (string fileName, string name, bool isPrivate)
1020                 {
1021                         FileName = fileName;
1022                         Name = name;
1023                         Attributes = isPrivate ? ResourceAttributes.Private : ResourceAttributes.Public;
1024                 }
1025
1026                 public ResourceAttributes Attributes { get; private set; }
1027                 public string Name { get; private set; }
1028                 public string FileName { get; private set; }
1029                 public bool IsEmbeded { get; set; }
1030
1031                 #region IEquatable<AssemblyResource> Members
1032
1033                 public bool Equals (AssemblyResource other)
1034                 {
1035                         return Name == other.Name;
1036                 }
1037
1038                 #endregion
1039         }
1040
1041         //
1042         // A placeholder class for assembly attributes when emitting module
1043         //
1044         class AssemblyAttributesPlaceholder : CompilerGeneratedContainer
1045         {
1046                 static readonly string TypeNamePrefix = "<$AssemblyAttributes${0}>";
1047                 public static readonly string AssemblyFieldName = "attributes";
1048
1049                 Field assembly;
1050
1051                 public AssemblyAttributesPlaceholder (ModuleContainer parent, string outputName)
1052                         : base (parent, new MemberName (GetGeneratedName (outputName)), Modifiers.STATIC | Modifiers.INTERNAL)
1053                 {
1054                         assembly = new Field (this, new TypeExpression (parent.Compiler.BuiltinTypes.Object, Location), Modifiers.PUBLIC | Modifiers.STATIC,
1055                                 new MemberName (AssemblyFieldName), null);
1056
1057                         AddField (assembly);
1058                 }
1059
1060                 public void AddAssemblyAttribute (MethodSpec ctor, byte[] data)
1061                 {
1062                         assembly.SetCustomAttribute (ctor, data);
1063                 }
1064
1065                 public static string GetGeneratedName (string outputName)
1066                 {
1067                         return string.Format (TypeNamePrefix, outputName);
1068                 }
1069         }
1070
1071         //
1072         // Extension to System.Reflection.Emit.AssemblyBuilder to have fully compatible
1073         // compiler. This is a default implementation for framework System.Reflection.Emit
1074         // which does not implement any of the methods
1075         //
1076         public class AssemblyBuilderExtension
1077         {
1078                 readonly CompilerContext ctx;
1079
1080                 public AssemblyBuilderExtension (CompilerContext ctx)
1081                 {
1082                         this.ctx = ctx;
1083                 }
1084
1085                 public virtual System.Reflection.Module AddModule (string module)
1086                 {
1087                         ctx.Report.RuntimeMissingSupport (Location.Null, "-addmodule");
1088                         return null;
1089                 }
1090
1091                 public virtual void AddPermissionRequests (PermissionSet[] permissions)
1092                 {
1093                         ctx.Report.RuntimeMissingSupport (Location.Null, "assembly declarative security");
1094                 }
1095
1096                 public virtual void AddTypeForwarder (TypeSpec type, Location loc)
1097                 {
1098                         ctx.Report.RuntimeMissingSupport (loc, "TypeForwardedToAttribute");
1099                 }
1100
1101                 public virtual void DefineWin32IconResource (string fileName)
1102                 {
1103                         ctx.Report.RuntimeMissingSupport (Location.Null, "-win32icon");
1104                 }
1105
1106                 public virtual void SetAlgorithmId (uint value, Location loc)
1107                 {
1108                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyAlgorithmIdAttribute");
1109                 }
1110
1111                 public virtual void SetCulture (string culture, Location loc)
1112                 {
1113                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyCultureAttribute");
1114                 }
1115
1116                 public virtual void SetFlags (uint flags, Location loc)
1117                 {
1118                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyFlagsAttribute");
1119                 }
1120
1121                 public virtual void SetVersion (Version version, Location loc)
1122                 {
1123                         ctx.Report.RuntimeMissingSupport (loc, "AssemblyVersionAttribute");
1124                 }
1125         }
1126
1127         abstract class AssemblyReferencesLoader<T> where T : class
1128         {
1129                 protected readonly CompilerContext compiler;
1130
1131                 protected readonly List<string> paths;
1132
1133                 protected AssemblyReferencesLoader (CompilerContext compiler)
1134                 {
1135                         this.compiler = compiler;
1136
1137                         paths = new List<string> ();
1138                         paths.Add (Directory.GetCurrentDirectory ());
1139                         paths.AddRange (compiler.Settings.ReferencesLookupPaths);
1140                 }
1141
1142                 public abstract bool HasObjectType (T assembly);
1143                 protected abstract string[] GetDefaultReferences ();
1144                 public abstract T LoadAssemblyFile (string fileName, bool isImplicitReference);
1145                 public abstract void LoadReferences (ModuleContainer module);
1146
1147                 protected void Error_FileNotFound (string fileName)
1148                 {
1149                         compiler.Report.Error (6, "Metadata file `{0}' could not be found", fileName);
1150                 }
1151
1152                 protected void Error_FileCorrupted (string fileName)
1153                 {
1154                         compiler.Report.Error (9, "Metadata file `{0}' does not contain valid metadata", fileName);
1155                 }
1156
1157                 protected void Error_AssemblyIsModule (string fileName)
1158                 {
1159                         compiler.Report.Error (1509,
1160                                 "Referenced assembly file `{0}' is a module. Consider using `-addmodule' option to add the module",
1161                                 fileName);
1162                 }
1163
1164                 protected void Error_ModuleIsAssembly (string fileName)
1165                 {
1166                         compiler.Report.Error (1542,
1167                                 "Added module file `{0}' is an assembly. Consider using `-r' option to reference the file",
1168                                 fileName);
1169                 }
1170
1171                 protected void LoadReferencesCore (ModuleContainer module, out T corlib_assembly, out List<Tuple<RootNamespace, T>> loaded)
1172                 {
1173                         compiler.TimeReporter.Start (TimeReporter.TimerType.ReferencesLoading);
1174
1175                         loaded = new List<Tuple<RootNamespace, T>> ();
1176
1177                         //
1178                         // Load mscorlib.dll as the first
1179                         //
1180                         if (module.Compiler.Settings.StdLib) {
1181                                 corlib_assembly = LoadAssemblyFile ("mscorlib.dll", true);
1182                         } else {
1183                                 corlib_assembly = default (T);
1184                         }
1185
1186                         T a;
1187                         foreach (string r in module.Compiler.Settings.AssemblyReferences) {
1188                                 a = LoadAssemblyFile (r, false);
1189                                 if (a == null || EqualityComparer<T>.Default.Equals (a, corlib_assembly))
1190                                         continue;
1191
1192                                 var key = Tuple.Create (module.GlobalRootNamespace, a);
1193                                 if (loaded.Contains (key))
1194                                         continue;
1195
1196                                 loaded.Add (key);
1197                         }
1198
1199                         if (corlib_assembly == null) {
1200                                 //
1201                                 // Requires second pass because HasObjectType can trigger assembly load event
1202                                 //
1203                                 for (int i = 0; i < loaded.Count; ++i) {
1204                                         var assembly = loaded [i];
1205
1206                                         //
1207                                         // corlib assembly is the first referenced assembly which contains System.Object
1208                                         //
1209                                         if (HasObjectType (assembly.Item2)) {
1210                                                 corlib_assembly = assembly.Item2;
1211                                                 loaded.RemoveAt (i);
1212                                                 break;
1213                                         }
1214                                 }
1215                         }
1216
1217                         foreach (var entry in module.Compiler.Settings.AssemblyReferencesAliases) {
1218                                 a = LoadAssemblyFile (entry.Item2, false);
1219                                 if (a == null)
1220                                         continue;
1221
1222                                 var key = Tuple.Create (module.CreateRootNamespace (entry.Item1), a);
1223                                 if (loaded.Contains (key))
1224                                         continue;
1225
1226                                 loaded.Add (key);
1227                         }
1228
1229                         if (compiler.Settings.LoadDefaultReferences) {
1230                                 foreach (string r in GetDefaultReferences ()) {
1231                                         a = LoadAssemblyFile (r, true);
1232                                         if (a == null)
1233                                                 continue;
1234
1235                                         var key = Tuple.Create (module.GlobalRootNamespace, a);
1236                                         if (loaded.Contains (key))
1237                                                 continue;
1238
1239                                         loaded.Add (key);
1240                                 }
1241                         }
1242
1243                         compiler.TimeReporter.Stop (TimeReporter.TimerType.ReferencesLoading);
1244                 }
1245         }
1246 }