mcs/class/corlib/System.Reflection/MonoField.cs

   1
   2 //
   3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 //
  26 // System.Reflection/MonoField.cs
  27 // The class used to represent Fields from the mono runtime.
  28 //
  29 // Author:
  30 //   Paolo Molaro (lupus@ximian.com)
  31 //
  32 // (C) 2001 Ximian, Inc.  http://www.ximian.com
  33 //
  34
  35 using System;
  36 using System.Collections.Generic;
  37 using System.Globalization;
  38 using System.Runtime.CompilerServices;
  39 using System.Runtime.InteropServices;
  40 using System.Runtime.Serialization;
  41 using System.Diagnostics;
  42 using System.Diagnostics.Contracts;
  43
  44 namespace System.Reflection {
  45
  46         abstract class RuntimeFieldInfo : FieldInfo, ISerializable
  47         {
  48                 internal BindingFlags BindingFlags {
  49                         get {
  50                                 return 0;
  51                         }
  52                 }
  53
  54                 public override Module Module {
  55                         get {
  56                                 return GetRuntimeModule ();
  57                         }
  58                 }
  59
  60                 internal RuntimeType GetDeclaringTypeInternal ()
  61                 {
  62                         return (RuntimeType) DeclaringType;
  63                 }
  64
  65                 RuntimeType ReflectedTypeInternal {
  66                         get {
  67                                 return (RuntimeType) ReflectedType;
  68                         }
  69                 }
  70
  71                 internal RuntimeModule GetRuntimeModule ()
  72                 {
  73                         return GetDeclaringTypeInternal ().GetRuntimeModule ();
  74                 }
  75
  76         #region ISerializable Implementation
  77         public void GetObjectData(SerializationInfo info, StreamingContext context)
  78         {
  79             if (info == null)
  80                 throw new ArgumentNullException("info");
  81             Contract.EndContractBlock();
  82             MemberInfoSerializationHolder.GetSerializationInfo(
  83                 info,
  84                 Name,
  85                 ReflectedTypeInternal,
  86                 ToString(),
  87                 MemberTypes.Field);
  88         }
  89         #endregion
  90         }
  91
  92         abstract class RtFieldInfo : RuntimeFieldInfo
  93         {
  94                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  95                 internal extern object UnsafeGetValue (object obj);
  96
  97         internal void CheckConsistency(Object target)
  98         {
  99             // only test instance fields
 100             if ((Attributes & FieldAttributes.Static) != FieldAttributes.Static)
 101             {
 102                 if (!DeclaringType.IsInstanceOfType(target))
 103                 {
 104                     if (target == null)
 105                     {
 106 #if FEATURE_LEGACYNETCF
 107                         if (CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
 108                             throw new ArgumentNullException(Environment.GetResourceString("RFLCT.Targ_StatFldReqTarg"));
 109                         else
 110 #endif
 111                         throw new TargetException(Environment.GetResourceString("RFLCT.Targ_StatFldReqTarg"));
 112                     }
 113                     else
 114                     {
 115                         throw new ArgumentException(
 116                             String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString("Arg_FieldDeclTarget"),
 117                                 Name, DeclaringType, target.GetType()));
 118                     }
 119                 }
 120             }
 121         }
 122
 123                 [DebuggerStepThroughAttribute]
 124                 [Diagnostics.DebuggerHidden]
 125                 internal void UnsafeSetValue (Object obj, Object value, BindingFlags invokeAttr, Binder binder, CultureInfo culture)
 126                 {
 127                         bool domainInitialized = false;
 128                         RuntimeFieldHandle.SetValue (this, obj, value, null, Attributes, null, ref domainInitialized);
 129                 }
 130
 131         [DebuggerStepThroughAttribute]
 132         [Diagnostics.DebuggerHidden]
 133         public override void SetValueDirect(TypedReference obj, Object value)
 134         {
 135             if (obj.IsNull)
 136                 throw new ArgumentException(Environment.GetResourceString("Arg_TypedReference_Null"));
 137             Contract.EndContractBlock();
 138
 139             unsafe
 140             {
 141                 // Passing TypedReference by reference is easier to make correct in native code
 142                 RuntimeFieldHandle.SetValueDirect(this, (RuntimeType)FieldType, &obj, value, (RuntimeType)DeclaringType);
 143             }
 144         }
 145
 146         [DebuggerStepThroughAttribute]
 147         [Diagnostics.DebuggerHidden]
 148         public override Object GetValueDirect(TypedReference obj)
 149         {
 150             if (obj.IsNull)
 151                 throw new ArgumentException(Environment.GetResourceString("Arg_TypedReference_Null"));
 152             Contract.EndContractBlock();
 153
 154             unsafe
 155             {
 156                 // Passing TypedReference by reference is easier to make correct in native code
 157                 return RuntimeFieldHandle.GetValueDirect(this, (RuntimeType)FieldType, &obj, (RuntimeType)DeclaringType);
 158             }
 159         }
 160         }
 161
 162         [Serializable]
 163         [StructLayout (LayoutKind.Sequential)]
 164         internal class MonoField : RtFieldInfo {
 165                 internal IntPtr klass;
 166                 internal RuntimeFieldHandle fhandle;
 167                 string name;
 168                 Type type;
 169                 FieldAttributes attrs;
 170
 171                 public override FieldAttributes Attributes {
 172                         get {
 173                                 return attrs;
 174                         }
 175                 }
 176                 public override RuntimeFieldHandle FieldHandle {
 177                         get {
 178                                 return fhandle;
 179                         }
 180                 }
 181
 182                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 183                 extern Type ResolveType ();
 184
 185                 public override Type FieldType {
 186                         get {
 187                                 if (type == null)
 188                                         type = ResolveType ();
 189                                 return type;
 190                         }
 191                 }
 192
 193                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 194                 private extern Type GetParentType (bool declaring);
 195
 196                 public override Type ReflectedType {
 197                         get {
 198                                 return GetParentType (false);
 199                         }
 200                 }
 201                 public override Type DeclaringType {
 202                         get {
 203                                 return GetParentType (true);
 204                         }
 205                 }
 206                 public override string Name {
 207                         get {
 208                                 return name;
 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 override extern int GetFieldOffset ();
 225
 226                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 227                 private extern object GetValueInternal (object obj);
 228
 229                 public override object GetValue (object obj)
 230                 {
 231                         if (!IsStatic) {
 232                                 if (obj == null)
 233                                         throw new TargetException ("Non-static field requires a target");
 234                                 if (!DeclaringType.IsAssignableFrom (obj.GetType ()))
 235                                         throw new ArgumentException (string.Format (
 236                                                 "Field {0} defined on type {1} is not a field on the target object which is of type {2}.",
 237                                                 Name, DeclaringType, obj.GetType ()),
 238                                                 "obj");
 239                         }
 240
 241                         if (!IsLiteral)
 242                                 CheckGeneric ();
 243                         return GetValueInternal (obj);
 244                 }
 245
 246                 public override string ToString () {
 247                         return String.Format ("{0} {1}", FieldType, name);
 248                 }
 249
 250                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 251                 private static extern void SetValueInternal (FieldInfo fi, object obj, object value);
 252
 253                 public override void SetValue (object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture)
 254                 {
 255                         if (!IsStatic) {
 256                                 if (obj == null)
 257                                         throw new TargetException ("Non-static field requires a target");
 258                                 if (!DeclaringType.IsAssignableFrom (obj.GetType ()))
 259                                         throw new ArgumentException (string.Format (
 260                                                 "Field {0} defined on type {1} is not a field on the target object which is of type {2}.",
 261                                                 Name, DeclaringType, obj.GetType ()),
 262                                                 "obj");
 263                         }
 264                         if (IsLiteral)
 265                                 throw new FieldAccessException ("Cannot set a constant field");
 266                         if (binder == null)
 267                                 binder = Type.DefaultBinder;
 268                         CheckGeneric ();
 269                         if (val != null) {
 270                                 RuntimeType fieldType = (RuntimeType) FieldType;
 271                                 val = fieldType.CheckValue (val, binder, culture, invokeAttr);
 272                         }
 273                         SetValueInternal (this, obj, val);
 274                 }
 275
 276                 internal MonoField Clone (string newName)
 277                 {
 278                         MonoField field = new MonoField ();
 279                         field.name = newName;
 280                         field.type = type;
 281                         field.attrs = attrs;
 282                         field.klass = klass;
 283                         field.fhandle = fhandle;
 284                         return field;
 285                 }
 286
 287                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 288                 public override extern object GetRawConstantValue ();
 289
 290                 public override IList<CustomAttributeData> GetCustomAttributesData () {
 291                         return CustomAttributeData.GetCustomAttributes (this);
 292                 }
 293
 294                 void CheckGeneric () {
 295                         if (DeclaringType.ContainsGenericParameters)
 296                                 throw new InvalidOperationException ("Late bound operations cannot be performed on fields with types for which Type.ContainsGenericParameters is true.");
 297             }
 298
 299 #if MOBILE
 300                 static int get_core_clr_security_level ()
 301                 {
 302                         return 1;
 303                 }
 304 #else
 305                 //seclevel { transparent = 0, safe-critical = 1, critical = 2}
 306                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 307                 public extern int get_core_clr_security_level ();
 308
 309                 public override bool IsSecurityTransparent {
 310                         get { return get_core_clr_security_level () == 0; }
 311                 }
 312
 313                 public override bool IsSecurityCritical {
 314                         get { return get_core_clr_security_level () > 0; }
 315                 }
 316
 317                 public override bool IsSecuritySafeCritical {
 318                         get { return get_core_clr_security_level () == 1; }
 319                 }
 320 #endif
 321
 322                 public sealed override bool HasSameMetadataDefinitionAs (MemberInfo other) => HasSameMetadataDefinitionAsCore<MonoField> (other);
 323
 324                 public override int MetadataToken {
 325                         get {
 326                                 return get_metadata_token (this);
 327                         }
 328                 }
 329
 330                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 331                 internal static extern int get_metadata_token (MonoField monoField);
 332         }
 333 }