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