class/corlib/System.Reflection/MonoMethod.cs

   1 //
   2 // System.Reflection/MonoMethod.cs
   3 // The class used to represent methods from the mono runtime.
   4 //
   5 // Author:
   6 //   Paolo Molaro (lupus@ximian.com)
   7 //
   8 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Collections.Generic;
  32 using System.Globalization;
  33 using System.Runtime.CompilerServices;
  34 using System.Runtime.InteropServices;
  35 using System.Runtime.Serialization;
  36 using System.Reflection.Emit;
  37 using System.Security;
  38 using System.Threading;
  39 using System.Text;
  40
  41
  42 namespace System.Reflection {
  43
  44         internal struct MonoMethodInfo
  45         {
  46 #pragma warning disable 649
  47                 private Type parent;
  48                 private Type ret;
  49                 internal MethodAttributes attrs;
  50                 internal MethodImplAttributes iattrs;
  51                 private CallingConventions callconv;
  52 #pragma warning restore 649
  53
  54                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  55                 static extern void get_method_info (IntPtr handle, out MonoMethodInfo info);
  56
  57                 internal static MonoMethodInfo GetMethodInfo (IntPtr handle)
  58                 {
  59                         MonoMethodInfo info;
  60                         MonoMethodInfo.get_method_info (handle, out info);
  61                         return info;
  62                 }
  63
  64                 internal static Type GetDeclaringType (IntPtr handle)
  65                 {
  66                         return GetMethodInfo (handle).parent;
  67                 }
  68
  69                 internal static Type GetReturnType (IntPtr handle)
  70                 {
  71                         return GetMethodInfo (handle).ret;
  72                 }
  73
  74                 internal static MethodAttributes GetAttributes (IntPtr handle)
  75                 {
  76                         return GetMethodInfo (handle).attrs;
  77                 }
  78
  79                 internal static CallingConventions GetCallingConvention (IntPtr handle)
  80                 {
  81                         return GetMethodInfo (handle).callconv;
  82                 }
  83
  84                 internal static MethodImplAttributes GetMethodImplementationFlags (IntPtr handle)
  85                 {
  86                         return GetMethodInfo (handle).iattrs;
  87                 }
  88
  89                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  90                 static extern ParameterInfo[] get_parameter_info (IntPtr handle, MemberInfo member);
  91
  92                 static internal ParameterInfo[] GetParametersInfo (IntPtr handle, MemberInfo member)
  93                 {
  94                         return get_parameter_info (handle, member);
  95                 }
  96
  97                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  98                 static extern UnmanagedMarshal get_retval_marshal (IntPtr handle);
  99
 100                 static internal ParameterInfo GetReturnParameterInfo (MonoMethod method)
 101                 {
 102                         return new ParameterInfo (GetReturnType (method.mhandle), method, get_retval_marshal (method.mhandle));
 103                 }
 104         };
 105
 106         /*
 107          * Note: most of this class needs to be duplicated for the contructor, since
 108          * the .NET reflection class hierarchy is so broken.
 109          */
 110         [Serializable()]
 111         internal class MonoMethod : MethodInfo, ISerializable
 112         {
 113 #pragma warning disable 649
 114                 internal IntPtr mhandle;
 115                 string name;
 116                 Type reftype;
 117 #pragma warning restore 649
 118
 119                 internal MonoMethod () {
 120                 }
 121
 122                 internal MonoMethod (RuntimeMethodHandle mhandle) {
 123                         this.mhandle = mhandle.Value;
 124                 }
 125
 126                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 127                 internal static extern string get_name (MethodBase method);
 128
 129                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 130                 internal static extern MonoMethod get_base_method (MonoMethod method, bool definition);
 131
 132                 public override MethodInfo GetBaseDefinition ()
 133                 {
 134                         return get_base_method (this, true);
 135                 }
 136
 137                 internal override MethodInfo GetBaseMethod ()
 138                 {
 139                         return get_base_method (this, false);
 140                 }
 141
 142                 public override ParameterInfo ReturnParameter {
 143                         get {
 144                                 return MonoMethodInfo.GetReturnParameterInfo (this);
 145                         }
 146                 }
 147
 148                 public override Type ReturnType {
 149                         get {
 150                                 return MonoMethodInfo.GetReturnType (mhandle);
 151                         }
 152                 }
 153                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 154                         get {
 155                                 return MonoMethodInfo.GetReturnParameterInfo (this);
 156                         }
 157                 }
 158
 159                 public override MethodImplAttributes GetMethodImplementationFlags ()
 160                 {
 161                         return MonoMethodInfo.GetMethodImplementationFlags (mhandle);
 162                 }
 163
 164                 public override ParameterInfo[] GetParameters ()
 165                 {
 166                         ParameterInfo[] src = MonoMethodInfo.GetParametersInfo (mhandle, this);
 167                         ParameterInfo[] res = new ParameterInfo [src.Length];
 168                         src.CopyTo (res, 0);
 169                         return res;
 170                 }
 171
 172                 internal override int GetParameterCount ()
 173                 {
 174                         var pi = MonoMethodInfo.GetParametersInfo (mhandle, this);
 175                         return pi == null ? 0 : pi.Length;
 176                 }
 177
 178                 /*
 179                  * InternalInvoke() receives the parameters correctly converted by the
 180                  * binder to match the types of the method signature.
 181                  */
 182                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 183                 internal extern Object InternalInvoke (Object obj, Object[] parameters, out Exception exc);
 184
 185                 public override Object Invoke (Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 186                 {
 187                         if (binder == null)
 188                                 binder = Binder.DefaultBinder;
 189                         /*Avoid allocating an array every time*/
 190                         ParameterInfo[] pinfo = MonoMethodInfo.GetParametersInfo (mhandle, this);
 191
 192                         if ((parameters == null && pinfo.Length != 0) || (parameters != null && parameters.Length != pinfo.Length))
 193                                 throw new TargetParameterCountException ("parameters do not match signature");
 194
 195                         if ((invokeAttr & BindingFlags.ExactBinding) == 0) {
 196                                 if (!Binder.ConvertArgs (binder, parameters, pinfo, culture))
 197                                         throw new ArgumentException ("failed to convert parameters");
 198                         } else {
 199                                 for (int i = 0; i < pinfo.Length; i++)
 200                                         if (parameters[i].GetType() != pinfo[i].ParameterType)
 201                                                 throw new ArgumentException ("parameters do not match signature");
 202                         }
 203
 204 #if !NET_2_1
 205                         if (SecurityManager.SecurityEnabled) {
 206                                 // sadly Attributes doesn't tell us which kind of security action this is so
 207                                 // we must do it the hard way - and it also means that we can skip calling
 208                                 // Attribute (which is another an icall)
 209                                 SecurityManager.ReflectedLinkDemandInvoke (this);
 210                         }
 211 #endif
 212
 213                         if (ContainsGenericParameters)
 214                                 throw new InvalidOperationException ("Late bound operations cannot be performed on types or methods for which ContainsGenericParameters is true.");
 215
 216                         Exception exc;
 217                         object o = null;
 218
 219                         try {
 220                                 // The ex argument is used to distinguish exceptions thrown by the icall
 221                                 // from the exceptions thrown by the called method (which need to be
 222                                 // wrapped in TargetInvocationException).
 223                                 o = InternalInvoke (obj, parameters, out exc);
 224                         } catch (ThreadAbortException) {
 225                                 throw;
 226 #if NET_2_1
 227                         } catch (MethodAccessException) {
 228                                 throw;
 229 #endif
 230                         } catch (Exception e) {
 231                                 throw new TargetInvocationException (e);
 232                         }
 233
 234                         if (exc != null)
 235                                 throw exc;
 236                         return o;
 237                 }
 238
 239                 public override RuntimeMethodHandle MethodHandle {
 240                         get {return new RuntimeMethodHandle (mhandle);}
 241                 }
 242                 public override MethodAttributes Attributes {
 243                         get {
 244                                 return MonoMethodInfo.GetAttributes (mhandle);
 245                         }
 246                 }
 247
 248                 public override CallingConventions CallingConvention {
 249                         get {
 250                                 return MonoMethodInfo.GetCallingConvention (mhandle);
 251                         }
 252                 }
 253
 254                 public override Type ReflectedType {
 255                         get {
 256                                 return reftype;
 257                         }
 258                 }
 259                 public override Type DeclaringType {
 260                         get {
 261                                 return MonoMethodInfo.GetDeclaringType (mhandle);
 262                         }
 263                 }
 264                 public override string Name {
 265                         get {
 266                                 if (name != null)
 267                                         return name;
 268                                 return get_name (this);
 269                         }
 270                 }
 271
 272                 public override bool IsDefined (Type attributeType, bool inherit) {
 273                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 274                 }
 275
 276                 public override object[] GetCustomAttributes( bool inherit) {
 277                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 278                 }
 279                 public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
 280                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 281                 }
 282
 283                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 284                 internal static extern DllImportAttribute GetDllImportAttribute (IntPtr mhandle);
 285
 286                 internal object[] GetPseudoCustomAttributes ()
 287                 {
 288                         int count = 0;
 289
 290                         /* MS.NET doesn't report MethodImplAttribute */
 291
 292                         MonoMethodInfo info = MonoMethodInfo.GetMethodInfo (mhandle);
 293                         if ((info.iattrs & MethodImplAttributes.PreserveSig) != 0)
 294                                 count ++;
 295                         if ((info.attrs & MethodAttributes.PinvokeImpl) != 0)
 296                                 count ++;
 297
 298                         if (count == 0)
 299                                 return null;
 300                         object[] attrs = new object [count];
 301                         count = 0;
 302
 303                         if ((info.iattrs & MethodImplAttributes.PreserveSig) != 0)
 304                                 attrs [count ++] = new PreserveSigAttribute ();
 305                         if ((info.attrs & MethodAttributes.PinvokeImpl) != 0) {
 306                                 DllImportAttribute attr = GetDllImportAttribute (mhandle);
 307                                 if ((info.iattrs & MethodImplAttributes.PreserveSig) != 0)
 308                                         attr.PreserveSig = true;
 309                                 attrs [count ++] = attr;
 310                         }
 311
 312                         return attrs;
 313                 }
 314
 315                 static bool ShouldPrintFullName (Type type) {
 316                         return type.IsClass && (!type.IsPointer ||
 317                                 (!type.GetElementType ().IsPrimitive && !type.GetElementType ().IsNested));
 318                 }
 319
 320                 public override string ToString () {
 321                         StringBuilder sb = new StringBuilder ();
 322                         Type retType = ReturnType;
 323                         if (ShouldPrintFullName (retType))
 324                                 sb.Append (retType.ToString ());
 325                         else
 326                                 sb.Append (retType.Name);
 327                         sb.Append (" ");
 328                         sb.Append (Name);
 329                         if (IsGenericMethod) {
 330                                 Type[] gen_params = GetGenericArguments ();
 331                                 sb.Append ("[");
 332                                 for (int j = 0; j < gen_params.Length; j++) {
 333                                         if (j > 0)
 334                                                 sb.Append (",");
 335                                         sb.Append (gen_params [j].Name);
 336                                 }
 337                                 sb.Append ("]");
 338                         }
 339                         sb.Append ("(");
 340                         ParameterInfo[] p = GetParameters ();
 341                         for (int i = 0; i < p.Length; ++i) {
 342                                 if (i > 0)
 343                                         sb.Append (", ");
 344                                 Type pt = p[i].ParameterType;
 345                                 bool byref = pt.IsByRef;
 346                                 if (byref)
 347                                         pt = pt.GetElementType ();
 348                                 if (ShouldPrintFullName (pt))
 349                                         sb.Append (pt.ToString ());
 350                                 else
 351                                         sb.Append (pt.Name);
 352                                 if (byref)
 353                                         sb.Append (" ByRef");
 354                         }
 355                         if ((CallingConvention & CallingConventions.VarArgs) != 0) {
 356                                 if (p.Length > 0)
 357                                         sb.Append (", ");
 358                                 sb.Append ("...");
 359                         }
 360
 361                         sb.Append (")");
 362                         return sb.ToString ();
 363                 }
 364
 365
 366                 // ISerializable
 367                 public void GetObjectData(SerializationInfo info, StreamingContext context)
 368                 {
 369                         Type[] genericArguments = IsGenericMethod && !IsGenericMethodDefinition
 370                                 ? GetGenericArguments () : null;
 371                         MemberInfoSerializationHolder.Serialize ( info, Name, ReflectedType, ToString(), MemberTypes.Method, genericArguments);
 372                 }
 373
 374                 public override MethodInfo MakeGenericMethod (Type [] methodInstantiation)
 375                 {
 376                         if (methodInstantiation == null)
 377                                 throw new ArgumentNullException ("methodInstantiation");
 378
 379                         if (!IsGenericMethodDefinition)
 380                                 throw new InvalidOperationException ("not a generic method definition");
 381
 382                         /*FIXME add GetGenericArgumentsLength() internal vcall to speed this up*/
 383                         if (GetGenericArguments ().Length != methodInstantiation.Length)
 384                                 throw new ArgumentException ("Incorrect length");
 385
 386                         bool hasUserType = false;
 387                         foreach (Type type in methodInstantiation) {
 388                                 if (type == null)
 389                                         throw new ArgumentNullException ();
 390                                 if (!(type is MonoType))
 391                                         hasUserType = true;
 392                         }
 393
 394                         if (hasUserType)
 395                                 return new MethodOnTypeBuilderInst (this, methodInstantiation);
 396
 397                         MethodInfo ret = MakeGenericMethod_impl (methodInstantiation);
 398                         if (ret == null)
 399                                 throw new ArgumentException (String.Format ("The method has {0} generic parameter(s) but {1} generic argument(s) were provided.", GetGenericArguments ().Length, methodInstantiation.Length));
 400                         return ret;
 401                 }
 402
 403                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 404                 extern MethodInfo MakeGenericMethod_impl (Type [] types);
 405
 406                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 407                 public override extern Type [] GetGenericArguments ();
 408
 409                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 410                 extern MethodInfo GetGenericMethodDefinition_impl ();
 411
 412                 public override MethodInfo GetGenericMethodDefinition ()
 413                 {
 414                         MethodInfo res = GetGenericMethodDefinition_impl ();
 415                         if (res == null)
 416                                 throw new InvalidOperationException ();
 417
 418                         return res;
 419                 }
 420
 421                 public override extern bool IsGenericMethodDefinition {
 422                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 423                         get;
 424                 }
 425
 426                 public override extern bool IsGenericMethod {
 427                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 428                         get;
 429                 }
 430
 431                 public override bool ContainsGenericParameters {
 432                         get {
 433                                 if (IsGenericMethod) {
 434                                         foreach (Type arg in GetGenericArguments ())
 435                                                 if (arg.ContainsGenericParameters)
 436                                                         return true;
 437                                 }
 438                                 return DeclaringType.ContainsGenericParameters;
 439                         }
 440                 }
 441
 442                 public override MethodBody GetMethodBody () {
 443                         return GetMethodBody (mhandle);
 444                 }
 445
 446 #if NET_4_0
 447                 public override IList<CustomAttributeData> GetCustomAttributesData () {
 448                         return CustomAttributeData.GetCustomAttributes (this);
 449                 }
 450 #endif
 451         }
 452
 453         internal class MonoCMethod : ConstructorInfo, ISerializable
 454         {
 455 #pragma warning disable 649
 456                 internal IntPtr mhandle;
 457                 string name;
 458                 Type reftype;
 459 #pragma warning restore 649
 460
 461                 public override MethodImplAttributes GetMethodImplementationFlags ()
 462                 {
 463                         return MonoMethodInfo.GetMethodImplementationFlags (mhandle);
 464                 }
 465
 466                 public override ParameterInfo[] GetParameters ()
 467                 {
 468                         return MonoMethodInfo.GetParametersInfo (mhandle, this);
 469                 }
 470
 471                 internal override int GetParameterCount ()
 472                 {
 473                         var pi = MonoMethodInfo.GetParametersInfo (mhandle, this);
 474                         return pi == null ? 0 : pi.Length;
 475                 }
 476
 477                 /*
 478                  * InternalInvoke() receives the parameters corretcly converted by the binder
 479                  * to match the types of the method signature.
 480                  */
 481                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 482                 internal extern Object InternalInvoke (Object obj, Object[] parameters, out Exception exc);
 483
 484                 public override Object Invoke (Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 485                 {
 486                         if (binder == null)
 487                                 binder = Binder.DefaultBinder;
 488
 489                         ParameterInfo[] pinfo = GetParameters ();
 490
 491                         if ((parameters == null && pinfo.Length != 0) || (parameters != null && parameters.Length != pinfo.Length))
 492                                 throw new TargetParameterCountException ("parameters do not match signature");
 493
 494                         if ((invokeAttr & BindingFlags.ExactBinding) == 0) {
 495                                 if (!Binder.ConvertArgs (binder, parameters, pinfo, culture))
 496                                         throw new ArgumentException ("failed to convert parameters");
 497                         } else {
 498                                 for (int i = 0; i < pinfo.Length; i++)
 499                                         if (parameters[i].GetType() != pinfo[i].ParameterType)
 500                                                 throw new ArgumentException ("parameters do not match signature");
 501                         }
 502
 503 #if !NET_2_1
 504                         if (SecurityManager.SecurityEnabled) {
 505                                 // sadly Attributes doesn't tell us which kind of security action this is so
 506                                 // we must do it the hard way - and it also means that we can skip calling
 507                                 // Attribute (which is another an icall)
 508                                 SecurityManager.ReflectedLinkDemandInvoke (this);
 509                         }
 510 #endif
 511
 512                         if (obj == null && DeclaringType.ContainsGenericParameters)
 513                                 throw new MemberAccessException ("Cannot create an instance of " + DeclaringType + " because Type.ContainsGenericParameters is true.");
 514
 515                         if ((invokeAttr & BindingFlags.CreateInstance) != 0 && DeclaringType.IsAbstract) {
 516                                 throw new MemberAccessException (String.Format ("Cannot create an instance of {0} because it is an abstract class", DeclaringType));
 517                         }
 518
 519                         Exception exc = null;
 520                         object o = null;
 521
 522                         try {
 523                                 o = InternalInvoke (obj, parameters, out exc);
 524 #if NET_2_1
 525                         } catch (MethodAccessException) {
 526                                 throw;
 527 #endif
 528                         } catch (Exception e) {
 529                                 throw new TargetInvocationException (e);
 530                         }
 531
 532                         if (exc != null)
 533                                 throw exc;
 534                         return (obj == null) ? o : null;
 535                 }
 536
 537                 public override Object Invoke (BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) {
 538                         return Invoke (null, invokeAttr, binder, parameters, culture);
 539                 }
 540
 541                 public override RuntimeMethodHandle MethodHandle {
 542                         get {return new RuntimeMethodHandle (mhandle);}
 543                 }
 544                 public override MethodAttributes Attributes {
 545                         get {
 546                                 return MonoMethodInfo.GetAttributes (mhandle);
 547                         }
 548                 }
 549
 550                 public override CallingConventions CallingConvention {
 551                         get {
 552                                 return MonoMethodInfo.GetCallingConvention (mhandle);
 553                         }
 554                 }
 555
 556                 public override Type ReflectedType {
 557                         get {
 558                                 return reftype;
 559                         }
 560                 }
 561                 public override Type DeclaringType {
 562                         get {
 563                                 return MonoMethodInfo.GetDeclaringType (mhandle);
 564                         }
 565                 }
 566                 public override string Name {
 567                         get {
 568                                 if (name != null)
 569                                         return name;
 570                                 return MonoMethod.get_name (this);
 571                         }
 572                 }
 573
 574                 public override bool IsDefined (Type attributeType, bool inherit) {
 575                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 576                 }
 577
 578                 public override object[] GetCustomAttributes( bool inherit) {
 579                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 580                 }
 581
 582                 public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
 583                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 584                 }
 585
 586                 public override MethodBody GetMethodBody () {
 587                         return GetMethodBody (mhandle);
 588                 }
 589
 590                 public override string ToString () {
 591                         StringBuilder sb = new StringBuilder ();
 592                         sb.Append ("Void ");
 593                         sb.Append (Name);
 594                         sb.Append ("(");
 595                         ParameterInfo[] p = GetParameters ();
 596                         for (int i = 0; i < p.Length; ++i) {
 597                                 if (i > 0)
 598                                         sb.Append (", ");
 599                                 sb.Append (p[i].ParameterType.Name);
 600                         }
 601                         if (CallingConvention == CallingConventions.Any)
 602                                 sb.Append (", ...");
 603                         sb.Append (")");
 604                         return sb.ToString ();
 605                 }
 606
 607                 // ISerializable
 608                 public void GetObjectData(SerializationInfo info, StreamingContext context)
 609                 {
 610                         MemberInfoSerializationHolder.Serialize ( info, Name, ReflectedType, ToString(), MemberTypes.Constructor);
 611                 }
 612
 613 #if NET_4_0
 614                 public override IList<CustomAttributeData> GetCustomAttributesData () {
 615                         return CustomAttributeData.GetCustomAttributes (this);
 616                 }
 617 #endif
 618         }
 619 }