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