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