mcs/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 #if NET_2_0
  45         [ComVisible (true)]
  46         [ClassInterfaceAttribute (ClassInterfaceType.None)]
  47         [ComDefaultInterfaceAttribute (typeof (_ConstructorBuilder))]
  48 #endif
  49         public sealed class ConstructorBuilder : ConstructorInfo {
  50                 private RuntimeMethodHandle mhandle;
  51                 private ILGenerator ilgen;
  52                 private 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                 private 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
  65                 internal ConstructorBuilder (TypeBuilder tb, MethodAttributes attributes, CallingConventions callingConvention, Type[] parameterTypes, Type[][] paramModReq, Type[][] paramModOpt) {
  66                         attrs = attributes | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName;
  67                         call_conv = callingConvention;
  68                         if (parameterTypes != null) {
  69                                 for (int i = 0; i < parameterTypes.Length; ++i)
  70                                         if (parameterTypes [i] == null)
  71                                                 throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
  72
  73                                 this.parameters = new Type [parameterTypes.Length];
  74                                 System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
  75                         }
  76                         type = tb;
  77                         table_idx = get_next_table_index (this, 0x06, true);
  78                         this.paramModReq = paramModReq;
  79                         this.paramModOpt = paramModOpt;
  80                 }
  81
  82                 public bool InitLocals {
  83                         get {return init_locals;}
  84                         set {init_locals = value;}
  85                 }
  86
  87                 internal TypeBuilder TypeBuilder {
  88                         get {return type;}
  89                 }
  90
  91                 public override MethodImplAttributes GetMethodImplementationFlags() {
  92                         return iattrs;
  93                 }
  94                 public override ParameterInfo[] GetParameters() {
  95                         if (parameters == null)
  96                                 return null;
  97
  98                         ParameterInfo[] retval = new ParameterInfo [parameters.Length];
  99                         for (int i = 0; i < parameters.Length; i++) {
 100                                 retval [i] = new ParameterInfo (pinfo == null ? null : pinfo [i+1], parameters [i], this, i + 1);
 101                         }
 102
 103                         return retval;
 104                 }
 105
 106                 internal override int GetParameterCount ()
 107                 {
 108                         if (parameters == null)
 109                                 return 0;
 110
 111                         return parameters.Length;
 112                 }
 113
 114                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) {
 115                         throw not_supported ();
 116                 }
 117                 public override object Invoke(BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture) {
 118                         throw not_supported ();
 119                 }
 120
 121                 public override RuntimeMethodHandle MethodHandle {
 122                         get {
 123                                 return mhandle;
 124                         }
 125                 }
 126
 127                 public override MethodAttributes Attributes {
 128                         get {return attrs;}
 129                 }
 130                 public override Type ReflectedType { get {return type;}}
 131                 public override Type DeclaringType { get {return type;}}
 132                 public Type ReturnType { get {return null;}}
 133                 public override string Name {
 134                         get {return (attrs & MethodAttributes.Static) != 0 ? ".cctor" : ".ctor";}
 135                 }
 136                 public string Signature {
 137                         get {return "constructor signature";}
 138                 }
 139
 140                 public void AddDeclarativeSecurity( SecurityAction action, PermissionSet pset) {
 141                         if (pset == null)
 142                                 throw new ArgumentNullException ("pset");
 143                         if ((action == SecurityAction.RequestMinimum) ||
 144                                 (action == SecurityAction.RequestOptional) ||
 145                                 (action == SecurityAction.RequestRefuse))
 146                                 throw new ArgumentException ("Request* values are not permitted", "action");
 147
 148                         RejectIfCreated ();
 149
 150                         if (permissions != null) {
 151                                 /* Check duplicate actions */
 152                                 foreach (RefEmitPermissionSet set in permissions)
 153                                         if (set.action == action)
 154                                                 throw new InvalidOperationException ("Multiple permission sets specified with the same SecurityAction.");
 155
 156                                 RefEmitPermissionSet[] new_array = new RefEmitPermissionSet [permissions.Length + 1];
 157                                 permissions.CopyTo (new_array, 0);
 158                                 permissions = new_array;
 159                         }
 160                         else
 161                                 permissions = new RefEmitPermissionSet [1];
 162
 163                         permissions [permissions.Length - 1] = new RefEmitPermissionSet (action, pset.ToXml ().ToString ());
 164                         attrs |= MethodAttributes.HasSecurity;
 165                 }
 166
 167                 public ParameterBuilder DefineParameter(int iSequence, ParameterAttributes attributes, string strParamName)
 168                 {
 169                         if ((iSequence < 1) || (iSequence > parameters.Length))
 170                                 throw new ArgumentOutOfRangeException ("iSequence");
 171                         if (type.is_created)
 172                                 throw not_after_created ();
 173
 174                         ParameterBuilder pb = new ParameterBuilder (this, iSequence, attributes, strParamName);
 175                         if (pinfo == null)
 176                                 pinfo = new ParameterBuilder [parameters.Length + 1];
 177                         pinfo [iSequence] = pb;
 178                         return pb;
 179                 }
 180
 181                 public override bool IsDefined (Type attribute_type, bool inherit) {
 182                         throw not_supported ();
 183                 }
 184
 185                 public override object [] GetCustomAttributes (bool inherit) {
 186                         throw not_supported ();
 187                 }
 188
 189                 public override object [] GetCustomAttributes (Type attribute_type, bool inherit) {
 190                         throw not_supported ();
 191                 }
 192
 193                 public ILGenerator GetILGenerator () {
 194                         return GetILGenerator (64);
 195                 }
 196
 197 #if NET_2_0
 198                 public
 199 #else
 200                 internal
 201 #endif
 202                 ILGenerator GetILGenerator (int size) {
 203                         ilgen = new ILGenerator (type.Module, ((ModuleBuilder)type.Module).GetTokenGenerator (), size);
 204                         return ilgen;
 205                 }
 206
 207                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
 208                         if (customBuilder == null)
 209                                 throw new ArgumentNullException ("customBuilder");
 210
 211                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 212                         if (attrname == "System.Runtime.CompilerServices.MethodImplAttribute") {
 213                                 byte[] data = customBuilder.Data;
 214                                 int impla; // the (stupid) ctor takes a short or an int ...
 215                                 impla = (int)data [2];
 216                                 impla |= ((int)data [3]) << 8;
 217                                 SetImplementationFlags ((MethodImplAttributes)impla);
 218                                 return;
 219                         }
 220                         if (cattrs != null) {
 221                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 222                                 cattrs.CopyTo (new_array, 0);
 223                                 new_array [cattrs.Length] = customBuilder;
 224                                 cattrs = new_array;
 225                         } else {
 226                                 cattrs = new CustomAttributeBuilder [1];
 227                                 cattrs [0] = customBuilder;
 228                         }
 229                 }
 230
 231 #if NET_2_0
 232                 [ComVisible (true)]
 233 #endif
 234                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 235                         if (con == null)
 236                                 throw new ArgumentNullException ("con");
 237                         if (binaryAttribute == null)
 238                                 throw new ArgumentNullException ("binaryAttribute");
 239
 240                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 241                 }
 242                 public void SetImplementationFlags( MethodImplAttributes attributes) {
 243                         if (type.is_created)
 244                                 throw not_after_created ();
 245
 246                         iattrs = attributes;
 247                 }
 248                 public Module GetModule() {
 249                         return type.Module;
 250                 }
 251                 public MethodToken GetToken() {
 252                         return new MethodToken (0x06000000 | table_idx);
 253                 }
 254
 255                 [MonoTODO]
 256                 public void SetSymCustomAttribute( string name, byte[] data) {
 257                         if (type.is_created)
 258                                 throw not_after_created ();
 259                 }
 260
 261 #if NET_2_0 || BOOTSTRAP_NET_2_0
 262                 public override bool Mono_IsInflatedMethod {
 263                         get {
 264                                 return false;
 265                         }
 266                 }
 267
 268                 public override bool HasGenericParameters {
 269                         get {
 270                                 return false;
 271                         }
 272                 }
 273
 274                 public override Module Module {
 275                         get {
 276                                 return base.Module;
 277                         }
 278                 }
 279 #endif
 280
 281                 public override string ToString() {
 282                         return "ConstructorBuilder ['" + type.Name + "']";
 283                 }
 284
 285                 internal void fixup () {
 286                         if (((attrs & (MethodAttributes.Abstract | MethodAttributes.PinvokeImpl)) == 0) && ((iattrs & (MethodImplAttributes.Runtime | MethodImplAttributes.InternalCall)) == 0)) {
 287                         if ((ilgen == null) || (ILGenerator.Mono_GetCurrentOffset (ilgen) == 0))
 288                                 throw new InvalidOperationException ("Method '" + Name + "' does not have a method body.");
 289                         }
 290                         if (ilgen != null)
 291                                 ilgen.label_fixup ();
 292                 }
 293
 294                 internal void GenerateDebugInfo (ISymbolWriter symbolWriter)
 295                 {
 296                         if (ilgen != null && ilgen.HasDebugInfo) {
 297                                 SymbolToken token = new SymbolToken (GetToken().Token);
 298                                 symbolWriter.OpenMethod (token);
 299                                 symbolWriter.SetSymAttribute (token, "__name", System.Text.Encoding.UTF8.GetBytes (Name));
 300                                 ilgen.GenerateDebugInfo (symbolWriter);
 301                                 symbolWriter.CloseMethod ();
 302                         }
 303                 }
 304
 305                 internal override int get_next_table_index (object obj, int table, bool inc) {
 306                         return type.get_next_table_index (obj, table, inc);
 307                 }
 308
 309                 private void RejectIfCreated () {
 310                         if (type.is_created)
 311                                 throw new InvalidOperationException ("Type definition of the method is complete.");
 312                 }
 313
 314                 private Exception not_supported () {
 315                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 316                 }
 317
 318                 private Exception not_after_created () {
 319                         return new InvalidOperationException ("Unable to change after type has been created.");
 320                 }
 321         }
 322 }