class/corlib/System.Reflection.Emit/ConstructorBuilder.cs

   1 //
   2 // System.Reflection.Emit.ConstructorBuilder.cs
   3 //
   4 // Author:
   5 //   Paolo Molaro (lupus@ximian.com)
   6 //
   7 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Reflection;
  35 using System.Reflection.Emit;
  36 using System.Globalization;
  37 using System.Security;
  38 using System.Security.Permissions;
  39 using System.Runtime.InteropServices;
  40 using System.Diagnostics.SymbolStore;
  41
  42 namespace System.Reflection.Emit {
  43
  44         [ComVisible (true)]
  45         [ComDefaultInterface (typeof (_ConstructorBuilder))]
  46         [ClassInterface (ClassInterfaceType.None)]
  47         public sealed class ConstructorBuilder : ConstructorInfo, _ConstructorBuilder {
  48
  49 #pragma warning disable 169, 414
  50                 private RuntimeMethodHandle mhandle;
  51                 private ILGenerator ilgen;
  52                 internal Type[] parameters;
  53                 private MethodAttributes attrs;
  54                 private MethodImplAttributes iattrs;
  55                 private int table_idx;
  56                 private CallingConventions call_conv;
  57                 private TypeBuilder type;
  58                 internal ParameterBuilder[] pinfo;
  59                 private CustomAttributeBuilder[] cattrs;
  60                 private bool init_locals = true;
  61                 private Type[][] paramModReq;
  62                 private Type[][] paramModOpt;
  63                 private RefEmitPermissionSet[] permissions;
  64 #pragma warning restore 169, 414
  65
  66                 internal ConstructorBuilder (TypeBuilder tb, MethodAttributes attributes, CallingConventions callingConvention, Type[] parameterTypes, Type[][] paramModReq, Type[][] paramModOpt)
  67                 {
  68                         attrs = attributes | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName;
  69                         call_conv = callingConvention;
  70                         if (parameterTypes != null) {
  71                                 for (int i = 0; i < parameterTypes.Length; ++i)
  72                                         if (parameterTypes [i] == null)
  73                                                 throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
  74
  75                                 this.parameters = new Type [parameterTypes.Length];
  76                                 System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
  77                         }
  78                         type = tb;
  79                         this.paramModReq = paramModReq;
  80                         this.paramModOpt = paramModOpt;
  81                         table_idx = get_next_table_index (this, 0x06, true);
  82
  83                         ((ModuleBuilder) tb.Module).RegisterToken (this, GetToken ().Token);
  84                 }
  85
  86                 [MonoTODO]
  87                 public override CallingConventions CallingConvention {
  88                         get {
  89                                 return call_conv;
  90                         }
  91                 }
  92
  93                 public bool InitLocals {
  94                         get {
  95                                 return init_locals;
  96                         }
  97                         set {
  98                                 init_locals = value;
  99                         }
 100                 }
 101
 102                 internal TypeBuilder TypeBuilder {
 103                         get {
 104                                 return type;
 105                         }
 106                 }
 107
 108                 public override MethodImplAttributes GetMethodImplementationFlags ()
 109                 {
 110                         return iattrs;
 111                 }
 112
 113                 public override ParameterInfo[] GetParameters ()
 114                 {
 115                         if (!type.is_created && !IsCompilerContext)
 116                                 throw not_created ();
 117
 118                         return GetParametersInternal ();
 119                 }
 120
 121                 internal ParameterInfo [] GetParametersInternal ()
 122                 {
 123                         if (parameters == null)
 124                                 return new ParameterInfo [0];
 125
 126                         ParameterInfo [] retval = new ParameterInfo [parameters.Length];
 127                         for (int i = 0; i < parameters.Length; i++)
 128                                 retval [i] = new ParameterInfo (pinfo == null ? null
 129                                         : pinfo [i + 1], parameters [i], this, i + 1);
 130
 131                         return retval;
 132                 }
 133
 134                 internal override int GetParameterCount ()
 135                 {
 136                         if (parameters == null)
 137                                 return 0;
 138
 139                         return parameters.Length;
 140                 }
 141
 142                 public override Object Invoke (Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 143                 {
 144                         throw not_supported ();
 145                 }
 146
 147                 public override object Invoke (BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
 148                 {
 149                         throw not_supported ();
 150                 }
 151
 152                 public override RuntimeMethodHandle MethodHandle {
 153                         get {
 154                                 throw not_supported ();
 155                         }
 156                 }
 157
 158                 public override MethodAttributes Attributes {
 159                         get {
 160                                 return attrs;
 161                         }
 162                 }
 163
 164                 public override Type ReflectedType {
 165                         get {
 166                                 return type;
 167                         }
 168                 }
 169
 170                 public override Type DeclaringType {
 171                         get {
 172                                 return type;
 173                         }
 174                 }
 175
 176 #if NET_4_0
 177                 [Obsolete]
 178 #endif
 179                 public Type ReturnType {
 180                         get {
 181                                 return null;
 182                         }
 183                 }
 184
 185                 public override string Name {
 186                         get {
 187                                 return (attrs & MethodAttributes.Static) != 0 ? ConstructorInfo.TypeConstructorName : ConstructorInfo.ConstructorName;
 188                         }
 189                 }
 190
 191                 public string Signature {
 192                         get {
 193                                 return "constructor signature";
 194                         }
 195                 }
 196
 197                 public void AddDeclarativeSecurity (SecurityAction action, PermissionSet pset)
 198                 {
 199 #if !NET_2_1
 200                         if (pset == null)
 201                                 throw new ArgumentNullException ("pset");
 202                         if ((action == SecurityAction.RequestMinimum) ||
 203                                 (action == SecurityAction.RequestOptional) ||
 204                                 (action == SecurityAction.RequestRefuse))
 205                                 throw new ArgumentOutOfRangeException ("action", "Request* values are not permitted");
 206
 207                         RejectIfCreated ();
 208
 209                         if (permissions != null) {
 210                                 /* Check duplicate actions */
 211                                 foreach (RefEmitPermissionSet set in permissions)
 212                                         if (set.action == action)
 213                                                 throw new InvalidOperationException ("Multiple permission sets specified with the same SecurityAction.");
 214
 215                                 RefEmitPermissionSet[] new_array = new RefEmitPermissionSet [permissions.Length + 1];
 216                                 permissions.CopyTo (new_array, 0);
 217                                 permissions = new_array;
 218                         }
 219                         else
 220                                 permissions = new RefEmitPermissionSet [1];
 221
 222                         permissions [permissions.Length - 1] = new RefEmitPermissionSet (action, pset.ToXml ().ToString ());
 223                         attrs |= MethodAttributes.HasSecurity;
 224 #endif
 225                 }
 226
 227                 public ParameterBuilder DefineParameter (int iSequence, ParameterAttributes attributes, string strParamName)
 228                 {
 229                         if (iSequence < 1 || iSequence > GetParameterCount ())
 230                                 throw new ArgumentOutOfRangeException ("iSequence");
 231                         if (type.is_created)
 232                                 throw not_after_created ();
 233
 234                         ParameterBuilder pb = new ParameterBuilder (this, iSequence, attributes, strParamName);
 235                         if (pinfo == null)
 236                                 pinfo = new ParameterBuilder [parameters.Length + 1];
 237                         pinfo [iSequence] = pb;
 238                         return pb;
 239                 }
 240
 241                 public override bool IsDefined (Type attributeType, bool inherit)
 242                 {
 243                         throw not_supported ();
 244                 }
 245
 246                 public override object [] GetCustomAttributes (bool inherit)
 247                 {
 248                         /*
 249                          * On MS.NET, this always returns not_supported, but we can't do this
 250                          * since there would be no way to obtain custom attributes of
 251                          * dynamically created ctors.
 252                          */
 253                         if (type.is_created && IsCompilerContext)
 254                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 255                         else
 256                                 throw not_supported ();
 257                 }
 258
 259                 public override object [] GetCustomAttributes (Type attributeType, bool inherit)
 260                 {
 261                         if (type.is_created && IsCompilerContext)
 262                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 263                         else
 264                                 throw not_supported ();
 265                 }
 266
 267                 public ILGenerator GetILGenerator ()
 268                 {
 269                         return GetILGenerator (64);
 270                 }
 271
 272                 public ILGenerator GetILGenerator (int streamSize)
 273                 {
 274                         if (ilgen != null)
 275                                 return ilgen;
 276                         ilgen = new ILGenerator (type.Module, ((ModuleBuilder)type.Module).GetTokenGenerator (), streamSize);
 277                         return ilgen;
 278                 }
 279
 280                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder)
 281                 {
 282                         if (customBuilder == null)
 283                                 throw new ArgumentNullException ("customBuilder");
 284
 285                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 286                         if (attrname == "System.Runtime.CompilerServices.MethodImplAttribute") {
 287                                 byte[] data = customBuilder.Data;
 288                                 int impla; // the (stupid) ctor takes a short or an int ...
 289                                 impla = (int)data [2];
 290                                 impla |= ((int)data [3]) << 8;
 291                                 SetImplementationFlags ((MethodImplAttributes)impla);
 292                                 return;
 293                         }
 294                         if (cattrs != null) {
 295                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 296                                 cattrs.CopyTo (new_array, 0);
 297                                 new_array [cattrs.Length] = customBuilder;
 298                                 cattrs = new_array;
 299                         } else {
 300                                 cattrs = new CustomAttributeBuilder [1];
 301                                 cattrs [0] = customBuilder;
 302                         }
 303                 }
 304
 305                 [ComVisible (true)]
 306                 public void SetCustomAttribute (ConstructorInfo con, byte[] binaryAttribute)
 307                 {
 308                         if (con == null)
 309                                 throw new ArgumentNullException ("con");
 310                         if (binaryAttribute == null)
 311                                 throw new ArgumentNullException ("binaryAttribute");
 312
 313                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 314                 }
 315
 316                 public void SetImplementationFlags (MethodImplAttributes attributes)
 317                 {
 318                         if (type.is_created)
 319                                 throw not_after_created ();
 320
 321                         iattrs = attributes;
 322                 }
 323
 324                 public Module GetModule ()
 325                 {
 326                         return type.Module;
 327                 }
 328
 329                 public MethodToken GetToken ()
 330                 {
 331                         return new MethodToken (0x06000000 | table_idx);
 332                 }
 333
 334                 [MonoTODO]
 335                 public void SetSymCustomAttribute (string name, byte[] data)
 336                 {
 337                         if (type.is_created)
 338                                 throw not_after_created ();
 339                 }
 340
 341                 public override Module Module {
 342                         get {
 343                                 return base.Module;
 344                         }
 345                 }
 346
 347                 public override string ToString ()
 348                 {
 349                         return "ConstructorBuilder ['" + type.Name + "']";
 350                 }
 351
 352                 internal void fixup ()
 353                 {
 354                         if (((attrs & (MethodAttributes.Abstract | MethodAttributes.PinvokeImpl)) == 0) && ((iattrs & (MethodImplAttributes.Runtime | MethodImplAttributes.InternalCall)) == 0)) {
 355                         if ((ilgen == null) || (ilgen.ILOffset == 0))
 356                                 throw new InvalidOperationException ("Method '" + Name + "' does not have a method body.");
 357                         }
 358                         if (ilgen != null)
 359                                 ilgen.label_fixup ();
 360                 }
 361
 362                 internal void GenerateDebugInfo (ISymbolWriter symbolWriter)
 363                 {
 364                         if (ilgen != null && ilgen.HasDebugInfo) {
 365                                 SymbolToken token = new SymbolToken (GetToken().Token);
 366                                 symbolWriter.OpenMethod (token);
 367                                 symbolWriter.SetSymAttribute (token, "__name", System.Text.Encoding.UTF8.GetBytes (Name));
 368                                 ilgen.GenerateDebugInfo (symbolWriter);
 369                                 symbolWriter.CloseMethod ();
 370                         }
 371                 }
 372
 373                 internal override int get_next_table_index (object obj, int table, bool inc)
 374                 {
 375                         return type.get_next_table_index (obj, table, inc);
 376                 }
 377
 378                 private bool IsCompilerContext {
 379                         get {
 380                                 ModuleBuilder mb = (ModuleBuilder) TypeBuilder.Module;
 381                                 AssemblyBuilder ab = (AssemblyBuilder) mb.Assembly;
 382                                 return ab.IsCompilerContext;
 383                         }
 384                 }
 385
 386                 private void RejectIfCreated ()
 387                 {
 388                         if (type.is_created)
 389                                 throw new InvalidOperationException ("Type definition of the method is complete.");
 390                 }
 391
 392                 private Exception not_supported ()
 393                 {
 394                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 395                 }
 396
 397                 private Exception not_after_created ()
 398                 {
 399                         return new InvalidOperationException ("Unable to change after type has been created.");
 400                 }
 401
 402                 private Exception not_created ()
 403                 {
 404                         return new NotSupportedException ("The type is not yet created.");
 405                 }
 406
 407                 void _ConstructorBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 408                 {
 409                         throw new NotImplementedException ();
 410                 }
 411
 412                 void _ConstructorBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 413                 {
 414                         throw new NotImplementedException ();
 415                 }
 416
 417                 void _ConstructorBuilder.GetTypeInfoCount (out uint pcTInfo)
 418                 {
 419                         throw new NotImplementedException ();
 420                 }
 421
 422                 void _ConstructorBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 423                 {
 424                         throw new NotImplementedException ();
 425                 }
 426         }
 427 }