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