mcs/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.Globalization;
  32 using System.Runtime.CompilerServices;
  33 using System.Runtime.InteropServices;
  34 using System.Runtime.Serialization;
  35 using System.Reflection.Emit;
  36 using System.Security;
  37 using System.Threading;
  38 using System.Text;
  39
  40
  41 namespace System.Reflection {
  42
  43         internal struct MonoMethodInfo
  44         {
  45                 internal Type parent;
  46                 internal Type ret;
  47                 internal MethodAttributes attrs;
  48                 internal MethodImplAttributes iattrs;
  49                 internal CallingConventions callconv;
  50
  51                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  52                 internal static extern void get_method_info (IntPtr handle, out MonoMethodInfo info);
  53
  54                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  55                 internal static extern ParameterInfo[] get_parameter_info (IntPtr handle);
  56
  57                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  58                 internal static extern UnmanagedMarshal get_retval_marshal (IntPtr handle);
  59         };
  60
  61         /*
  62          * Note: most of this class needs to be duplicated for the contructor, since
  63          * the .NET reflection class hierarchy is so broken.
  64          */
  65         [Serializable()]
  66         internal class MonoMethod : MethodInfo, ISerializable
  67         {
  68 #pragma warning disable 649
  69                 internal IntPtr mhandle;
  70                 string name;
  71                 Type reftype;
  72 #pragma warning restore 649
  73
  74                 internal MonoMethod () {
  75                 }
  76
  77                 internal MonoMethod (RuntimeMethodHandle mhandle) {
  78                         this.mhandle = mhandle.Value;
  79                 }
  80
  81                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  82                 internal static extern string get_name (MethodBase method);
  83
  84                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  85                 internal static extern MonoMethod get_base_definition (MonoMethod method);
  86
  87                 public override MethodInfo GetBaseDefinition ()
  88                 {
  89                         return get_base_definition (this);
  90                 }
  91
  92 #if NET_2_0 || BOOTSTRAP_NET_2_0
  93                 public override ParameterInfo ReturnParameter {
  94                         get {
  95                                 return new ParameterInfo (ReturnType, this, MonoMethodInfo.get_retval_marshal (mhandle));
  96                         }
  97                 }
  98 #endif
  99
 100                 public override Type ReturnType {
 101                         get {
 102                                 MonoMethodInfo info;
 103                                 MonoMethodInfo.get_method_info (mhandle, out info);
 104                                 return info.ret;
 105                         }
 106                 }
 107                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 108                         get {
 109                                 return new ParameterInfo (ReturnType, this, MonoMethodInfo.get_retval_marshal (mhandle));
 110                         }
 111                 }
 112
 113                 public override MethodImplAttributes GetMethodImplementationFlags() {
 114                         MonoMethodInfo info;
 115                         MonoMethodInfo.get_method_info (mhandle, out info);
 116                         return info.iattrs;
 117                 }
 118
 119                 public override ParameterInfo[] GetParameters() {
 120                         return MonoMethodInfo.get_parameter_info (mhandle);
 121                 }
 122
 123                 /*
 124                  * InternalInvoke() receives the parameters correctly converted by the
 125                  * binder to match the types of the method signature.
 126                  */
 127                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 128                 internal extern Object InternalInvoke (Object obj, Object[] parameters, out Exception exc);
 129
 130                 public override Object Invoke (Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 131                 {
 132                         if (binder == null)
 133                                 binder = Binder.DefaultBinder;
 134                         ParameterInfo[] pinfo = GetParameters ();
 135                         if (!Binder.ConvertArgs (binder, parameters, pinfo, culture))
 136                                 throw new ArgumentException ("parameters");
 137
 138 #if !NET_2_1
 139                         if (SecurityManager.SecurityEnabled) {
 140                                 // sadly Attributes doesn't tell us which kind of security action this is so
 141                                 // we must do it the hard way - and it also means that we can skip calling
 142                                 // Attribute (which is another an icall)
 143                                 SecurityManager.ReflectedLinkDemandInvoke (this);
 144                         }
 145 #endif
 146
 147 #if NET_2_0
 148                         if (ContainsGenericParameters)
 149                                 throw new InvalidOperationException ("Late bound operations cannot be performed on types or methods for which ContainsGenericParameters is true.");
 150 #endif
 151
 152                         Exception exc;
 153                         object o = null;
 154
 155                         try {
 156                                 // The ex argument is used to distinguish exceptions thrown by the icall
 157                                 // from the exceptions thrown by the called method (which need to be
 158                                 // wrapped in TargetInvocationException).
 159                                 o = InternalInvoke (obj, parameters, out exc);
 160 #if NET_2_0
 161                         } catch (ThreadAbortException) {
 162                                 throw;
 163 #endif
 164 #if NET_2_1
 165                         } catch (MethodAccessException) {
 166                                 throw;
 167 #endif
 168                         } catch (Exception e) {
 169                                 throw new TargetInvocationException (e);
 170                         }
 171
 172                         if (exc != null)
 173                                 throw exc;
 174                         return o;
 175                 }
 176
 177                 public override RuntimeMethodHandle MethodHandle {
 178                         get {return new RuntimeMethodHandle (mhandle);}
 179                 }
 180                 public override MethodAttributes Attributes {
 181                         get {
 182                                 MonoMethodInfo info;
 183                                 MonoMethodInfo.get_method_info (mhandle, out info);
 184                                 return info.attrs;
 185                         }
 186                 }
 187
 188                 public override CallingConventions CallingConvention {
 189                         get {
 190                                 MonoMethodInfo info;
 191                                 MonoMethodInfo.get_method_info (mhandle, out info);
 192                                 return info.callconv;
 193                         }
 194                 }
 195
 196                 public override Type ReflectedType {
 197                         get {
 198                                 return reftype;
 199                         }
 200                 }
 201                 public override Type DeclaringType {
 202                         get {
 203                                 MonoMethodInfo info;
 204                                 MonoMethodInfo.get_method_info (mhandle, out info);
 205                                 return info.parent;
 206                         }
 207                 }
 208                 public override string Name {
 209                         get {
 210                                 if (name != null)
 211                                         return name;
 212                                 return get_name (this);
 213                         }
 214                 }
 215
 216                 public override bool IsDefined (Type attributeType, bool inherit) {
 217                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 218                 }
 219
 220                 public override object[] GetCustomAttributes( bool inherit) {
 221                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 222                 }
 223                 public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
 224                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 225                 }
 226
 227                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 228                 internal static extern DllImportAttribute GetDllImportAttribute (IntPtr mhandle);
 229
 230                 internal object[] GetPseudoCustomAttributes ()
 231                 {
 232                         int count = 0;
 233
 234                         /* MS.NET doesn't report MethodImplAttribute */
 235
 236                         MonoMethodInfo info;
 237                         MonoMethodInfo.get_method_info (mhandle, out info);
 238                         if ((info.iattrs & MethodImplAttributes.PreserveSig) != 0)
 239                                 count ++;
 240                         if ((info.attrs & MethodAttributes.PinvokeImpl) != 0)
 241                                 count ++;
 242
 243                         if (count == 0)
 244                                 return null;
 245                         object[] attrs = new object [count];
 246                         count = 0;
 247
 248                         if ((info.iattrs & MethodImplAttributes.PreserveSig) != 0)
 249                                 attrs [count ++] = new PreserveSigAttribute ();
 250                         if ((info.attrs & MethodAttributes.PinvokeImpl) != 0) {
 251                                 DllImportAttribute attr = GetDllImportAttribute (mhandle);
 252                                 if ((info.iattrs & MethodImplAttributes.PreserveSig) != 0)
 253                                         attr.PreserveSig = true;
 254                                 attrs [count ++] = attr;
 255                         }
 256
 257                         return attrs;
 258                 }
 259
 260                 public override string ToString () {
 261                         StringBuilder sb = new StringBuilder ();
 262                         if (ReturnType.IsClass)
 263                                 sb.Append (ReturnType.ToString ());
 264                         else
 265                                 sb.Append (ReturnType.Name);
 266                         sb.Append (" ");
 267                         sb.Append (Name);
 268 #if NET_2_0 || BOOTSTRAP_NET_2_0
 269                         if (IsGenericMethod) {
 270                                 Type[] gen_params = GetGenericArguments ();
 271                                 sb.Append ("[");
 272                                 for (int j = 0; j < gen_params.Length; j++) {
 273                                         if (j > 0)
 274                                                 sb.Append (",");
 275                                         sb.Append (gen_params [j].Name);
 276                                 }
 277                                 sb.Append ("]");
 278                         }
 279 #endif
 280                         sb.Append ("(");
 281                         ParameterInfo[] p = GetParameters ();
 282                         for (int i = 0; i < p.Length; ++i) {
 283                                 if (i > 0)
 284                                         sb.Append (", ");
 285                                 Type pt = p[i].ParameterType;
 286                                 bool byref = pt.IsByRef;
 287                                 if (byref)
 288                                         pt = pt.GetElementType ();
 289                                 if (pt.IsClass)
 290                                         sb.Append (pt.ToString ());
 291                                 else
 292                                         sb.Append (pt.Name);
 293                                 if (byref)
 294                                         sb.Append (" ByRef");
 295                         }
 296                         if ((CallingConvention & CallingConventions.VarArgs) != 0) {
 297                                 if (p.Length > 0)
 298                                         sb.Append (", ");
 299                                 sb.Append ("...");
 300                         }
 301
 302                         sb.Append (")");
 303                         return sb.ToString ();
 304                 }
 305
 306
 307                 // ISerializable
 308                 public void GetObjectData(SerializationInfo info, StreamingContext context)
 309                 {
 310 #if NET_2_0
 311                         Type[] genericArguments = IsGenericMethod && !IsGenericMethodDefinition
 312                                 ? GetGenericArguments () : null;
 313                         MemberInfoSerializationHolder.Serialize ( info, Name, ReflectedType, ToString(), MemberTypes.Method, genericArguments);
 314 #else
 315                         MemberInfoSerializationHolder.Serialize ( info, Name, ReflectedType, ToString(), MemberTypes.Method);
 316 #endif
 317                 }
 318
 319 #if NET_2_0 || BOOTSTRAP_NET_2_0
 320                 public override MethodInfo MakeGenericMethod (Type [] methodInstantiation)
 321                 {
 322                         if (methodInstantiation == null)
 323                                 throw new ArgumentNullException ("methodInstantiation");
 324                         foreach (Type type in methodInstantiation)
 325                                 if (type == null)
 326                                         throw new ArgumentNullException ();
 327
 328                         MethodInfo ret = MakeGenericMethod_impl (methodInstantiation);
 329                         if (ret == null)
 330                                 throw new ArgumentException (String.Format ("The method has {0} generic parameter(s) but {1} generic argument(s) were provided.", GetGenericArguments ().Length, methodInstantiation.Length));
 331                         return ret;
 332                 }
 333
 334                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 335                 extern MethodInfo MakeGenericMethod_impl (Type [] types);
 336
 337                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 338                 public override extern Type [] GetGenericArguments ();
 339
 340                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 341                 extern MethodInfo GetGenericMethodDefinition_impl ();
 342
 343                 public override MethodInfo GetGenericMethodDefinition ()
 344                 {
 345                         MethodInfo res = GetGenericMethodDefinition_impl ();
 346                         if (res == null)
 347                                 throw new InvalidOperationException ();
 348
 349                         return res;
 350                 }
 351
 352                 public override extern bool IsGenericMethodDefinition {
 353                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 354                         get;
 355                 }
 356
 357                 public override extern bool IsGenericMethod {
 358                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 359                         get;
 360                 }
 361
 362                 public override bool ContainsGenericParameters {
 363                         get {
 364                                 if (IsGenericMethod) {
 365                                         foreach (Type arg in GetGenericArguments ())
 366                                                 if (arg.ContainsGenericParameters)
 367                                                         return true;
 368                                 }
 369                                 return DeclaringType.ContainsGenericParameters;
 370                         }
 371                 }
 372 #endif
 373
 374 #if NET_2_0
 375                 public override MethodBody GetMethodBody () {
 376                         return GetMethodBody (mhandle);
 377                 }
 378 #endif
 379         }
 380
 381         internal class MonoCMethod : ConstructorInfo, ISerializable
 382         {
 383 #pragma warning disable 649
 384                 internal IntPtr mhandle;
 385                 string name;
 386                 Type reftype;
 387 #pragma warning restore 649
 388
 389                 public override MethodImplAttributes GetMethodImplementationFlags() {
 390                         MonoMethodInfo info;
 391                         MonoMethodInfo.get_method_info (mhandle, out info);
 392                         return info.iattrs;
 393                 }
 394
 395                 public override ParameterInfo[] GetParameters() {
 396                         return MonoMethodInfo.get_parameter_info (mhandle);
 397                 }
 398
 399                 /*
 400                  * InternalInvoke() receives the parameters corretcly converted by the binder
 401                  * to match the types of the method signature.
 402                  */
 403                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 404                 internal extern Object InternalInvoke (Object obj, Object[] parameters, out Exception exc);
 405
 406                 public override Object Invoke (Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 407                 {
 408                         if (binder == null)
 409                                 binder = Binder.DefaultBinder;
 410                         ParameterInfo[] pinfo = GetParameters ();
 411                         if (!Binder.ConvertArgs (binder, parameters, pinfo, culture))
 412                                 throw new ArgumentException ("parameters");
 413
 414                         if (SecurityManager.SecurityEnabled) {
 415                                 // sadly Attributes doesn't tell us which kind of security action this is so
 416                                 // we must do it the hard way - and it also means that we can skip calling
 417                                 // Attribute (which is another an icall)
 418                                 SecurityManager.ReflectedLinkDemandInvoke (this);
 419                         }
 420
 421 #if NET_2_0
 422                         if (obj == null && DeclaringType.ContainsGenericParameters)
 423                                 throw new MemberAccessException ("Cannot create an instance of " + DeclaringType + " because Type.ContainsGenericParameters is true.");
 424 #endif
 425
 426                         if ((invokeAttr & BindingFlags.CreateInstance) != 0 && DeclaringType.IsAbstract) {
 427                                 throw new MemberAccessException (String.Format ("Cannot create an instance of {0} because it is an abstract class", DeclaringType));
 428                         }
 429
 430                         Exception exc = null;
 431                         object o = null;
 432
 433                         try {
 434                                 o = InternalInvoke (obj, parameters, out exc);
 435 #if NET_2_1
 436                         } catch (MethodAccessException) {
 437                                 throw;
 438 #endif
 439                         } catch (Exception e) {
 440                                 throw new TargetInvocationException (e);
 441                         }
 442
 443                         if (exc != null)
 444                                 throw exc;
 445                         return (obj == null) ? o : null;
 446                 }
 447
 448                 public override Object Invoke (BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) {
 449                         return Invoke (null, invokeAttr, binder, parameters, culture);
 450                 }
 451
 452                 public override RuntimeMethodHandle MethodHandle {
 453                         get {return new RuntimeMethodHandle (mhandle);}
 454                 }
 455                 public override MethodAttributes Attributes {
 456                         get {
 457                                 MonoMethodInfo info;
 458                                 MonoMethodInfo.get_method_info (mhandle, out info);
 459                                 return info.attrs;
 460                         }
 461                 }
 462
 463                 public override CallingConventions CallingConvention {
 464                         get {
 465                                 MonoMethodInfo info;
 466                                 MonoMethodInfo.get_method_info (mhandle, out info);
 467                                 return info.callconv;
 468                         }
 469                 }
 470
 471                 public override Type ReflectedType {
 472                         get {
 473                                 return reftype;
 474                         }
 475                 }
 476                 public override Type DeclaringType {
 477                         get {
 478                                 MonoMethodInfo info;
 479                                 MonoMethodInfo.get_method_info (mhandle, out info);
 480                                 return info.parent;
 481                         }
 482                 }
 483                 public override string Name {
 484                         get {
 485                                 if (name != null)
 486                                         return name;
 487                                 return MonoMethod.get_name (this);
 488                         }
 489                 }
 490
 491                 public override bool IsDefined (Type attributeType, bool inherit) {
 492                         return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
 493                 }
 494
 495                 public override object[] GetCustomAttributes( bool inherit) {
 496                         return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 497                 }
 498
 499                 public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
 500                         return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 501                 }
 502
 503 #if NET_2_0
 504                 public override MethodBody GetMethodBody () {
 505                         return GetMethodBody (mhandle);
 506                 }
 507 #endif
 508
 509                 public override string ToString () {
 510                         StringBuilder sb = new StringBuilder ();
 511                         sb.Append ("Void ");
 512                         sb.Append (Name);
 513                         sb.Append ("(");
 514                         ParameterInfo[] p = GetParameters ();
 515                         for (int i = 0; i < p.Length; ++i) {
 516                                 if (i > 0)
 517                                         sb.Append (", ");
 518                                 sb.Append (p[i].ParameterType.Name);
 519                         }
 520                         sb.Append (")");
 521                         return sb.ToString ();
 522                 }
 523
 524                 // ISerializable
 525                 public void GetObjectData(SerializationInfo info, StreamingContext context)
 526                 {
 527                         MemberInfoSerializationHolder.Serialize ( info, Name, ReflectedType, ToString(), MemberTypes.Constructor);
 528                 }
 529         }
 530 }