mcs/class/corlib/System/Exception.cs

   1 //
   2 // System.Exception.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Patrik Torstensson
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 using System.Runtime.InteropServices;
  12 using System.Runtime.Serialization;
  13 using System.Reflection;
  14 using System.Diagnostics;
  15
  16 namespace System
  17 {
  18         [Serializable]
  19         [ClassInterface (ClassInterfaceType.AutoDual)]
  20         public class Exception : ISerializable
  21         {
  22                 IntPtr [] trace_ips;
  23                 Exception inner_exception;
  24                 string message;
  25                 string help_link;
  26                 string class_name;
  27                 string stack_trace = null;
  28                 string remote_stack_trace = "";
  29                 int remote_stack_index = 0;
  30                 int hresult = unchecked ((int)0x80004005);
  31                 string source;
  32
  33                 public Exception ()
  34                 {
  35                         inner_exception = null;
  36                         message = null;
  37                         class_name = GetType().FullName;
  38                 }
  39
  40                 public Exception (string msg)
  41                 {
  42                         inner_exception = null;
  43                         message = msg;
  44                         class_name = GetType().FullName;
  45                 }
  46
  47                 protected Exception (SerializationInfo info, StreamingContext sc)
  48                 {
  49                         if (info == null)
  50                                 throw new ArgumentNullException ("info");
  51
  52                         class_name          = info.GetString ("ClassName");
  53                         message             = info.GetString ("Message");
  54                         help_link           = info.GetString ("HelpURL");
  55                         stack_trace         = info.GetString ("StackTraceString");
  56                         remote_stack_trace  = info.GetString ("RemoteStackTraceString");
  57                         remote_stack_index  = info.GetInt32  ("RemoteStackIndex");
  58                         hresult             = info.GetInt32  ("HResult");
  59                         source              = info.GetString ("Source");
  60                         inner_exception     = (Exception) info.GetValue ("InnerException", typeof (Exception));
  61                 }
  62
  63                 public Exception (string msg, Exception e)
  64                 {
  65                         inner_exception = e;
  66                         message = msg;
  67                         class_name = GetType().FullName;
  68                 }
  69
  70                 public Exception InnerException {
  71                         get { return inner_exception; }
  72                 }
  73
  74                 public virtual string HelpLink {
  75                         get { return help_link; }
  76                         set { help_link = value; }
  77                 }
  78
  79                 protected int HResult {
  80                         get { return hresult; }
  81                         set { hresult = value; }
  82                 }
  83
  84                 internal void SetMessage (string s)
  85                 {
  86                         message = s;
  87                 }
  88
  89                 public virtual string Message {
  90                         get {
  91                                 if (message == null)
  92                                         message = string.Format (Locale.GetText ("Exception of type {0} was thrown."), GetType ().ToString());
  93
  94                                 return message;
  95                         }
  96                 }
  97
  98                 public virtual string Source {
  99                         get {
 100                                 if (source == null) {
 101                                         StackTrace st = new StackTrace (this, true);
 102                                         if (st.FrameCount > 0) {
 103                                                 StackFrame sf = st.GetFrame (0);
 104                                                 if (st != null) {
 105                                                         MethodBase method = sf.GetMethod ();
 106                                                         if (method != null) {
 107                                                                 source = method.DeclaringType.Assembly.GetName ().Name;
 108                                                         }
 109                                                 }
 110                                         }
 111                                 }
 112
 113                                 // source can be null
 114                                 return source;
 115                         }
 116
 117                         set {
 118                                 source = value;
 119                         }
 120                 }
 121
 122                 public virtual string StackTrace {
 123                         get {
 124                                 return stack_trace;
 125                         }
 126                 }
 127
 128                 public MethodBase TargetSite {
 129                         get {
 130                                 StackTrace st = new StackTrace (this, true);
 131                                 if (st.FrameCount > 0)
 132                                         return st.GetFrame (0).GetMethod ();
 133
 134                                 return null;
 135                         }
 136                 }
 137
 138                 public virtual Exception GetBaseException ()
 139                 {
 140                         Exception inner = inner_exception;
 141
 142                         while (inner != null)
 143                         {
 144                                 if (inner.InnerException != null)
 145                                         inner = inner.InnerException;
 146                                 else
 147                                         return inner;
 148                         }
 149
 150                         return this;
 151                 }
 152
 153                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
 154                 {
 155                         info.AddValue ("ClassName", class_name);
 156                         info.AddValue ("Message", message);
 157                         info.AddValue ("InnerException", inner_exception);
 158                         info.AddValue ("HelpURL", help_link);
 159                         info.AddValue ("StackTraceString", stack_trace);
 160                         info.AddValue ("RemoteStackTraceString", remote_stack_trace);
 161                         info.AddValue ("RemoteStackIndex", remote_stack_index);
 162                         info.AddValue ("HResult", hresult);
 163                         info.AddValue ("Source", Source);
 164                         info.AddValue ("ExceptionMethod", null);
 165                 }
 166
 167                 public override string ToString ()
 168                 {
 169                         System.Text.StringBuilder result = new System.Text.StringBuilder (this.GetType ().FullName);
 170                         result.Append (": ").Append (Message);
 171
 172                         if (null != remote_stack_trace)
 173                                 result.Append (remote_stack_trace);
 174
 175                         if (inner_exception != null)
 176                         {
 177                                 result.Append (" ---> ").Append (inner_exception.ToString ());
 178                                 result.Append (Locale.GetText ("--- End of inner exception stack trace ---"));
 179                                 result.Append (Environment.NewLine);
 180                         }
 181
 182                         if (stack_trace != null)
 183                                 result.Append (Environment.NewLine).Append (stack_trace);
 184                         return result.ToString();
 185                 }
 186
 187                 internal Exception FixRemotingException ()
 188                 {
 189                         string message = (0 == remote_stack_index) ?
 190                                 Locale.GetText ("{0}{0}Server stack trace: {0}{1}{0}{0}Exception rethrown at [{2}]: {0}") :
 191                                 Locale.GetText ("{1}{0}{0}Exception rethrown at [{2}]: {0}");
 192                         string tmp = String.Format (message, Environment.NewLine, StackTrace, remote_stack_index);
 193
 194                         remote_stack_trace = tmp;
 195                         remote_stack_index++;
 196
 197                         stack_trace = null;
 198
 199                         return this;
 200                 }
 201         }
 202 }