mcs/class/corlib/System.Diagnostics/StackTrace.cs

   1 //
   2 // System.Diagnostics.StackTrace.cs
   3 //
   4 // Author:
   5 //      Alexander Klyubin (klyubin@aqris.com)
   6 //      Dietmar Maurer (dietmar@ximian.com)
   7 //
   8 // (C) 2001
   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.Collections.Generic;
  32 using System.Globalization;
  33 using System.Reflection;
  34 using System.Runtime.CompilerServices;
  35 using System.Runtime.InteropServices;
  36 using System.Security;
  37 using System.Security.Permissions;
  38 using System.Text;
  39 using System.Threading;
  40
  41 namespace System.Diagnostics {
  42
  43         [Serializable]
  44         [ComVisible (true)]
  45         [MonoTODO ("Serialized objects are not compatible with .NET")]
  46         public class StackTrace {
  47
  48         // TraceFormat is Used to specify options for how the
  49         // string-representation of a StackTrace should be generated.
  50         internal enum TraceFormat
  51         {
  52             Normal,
  53             TrailingNewLine,        // include a trailing new line character
  54             NoResourceLookup    // to prevent infinite resource recusion
  55         }
  56
  57                 public const int METHODS_TO_SKIP = 0;
  58
  59                 private StackFrame[] frames;
  60                 private bool debug_info;
  61
  62                 public StackTrace ()
  63                 {
  64                         init_frames (METHODS_TO_SKIP, false);
  65                 }
  66
  67                 public StackTrace (bool fNeedFileInfo)
  68                 {
  69                         init_frames (METHODS_TO_SKIP, fNeedFileInfo);
  70                 }
  71
  72                 public StackTrace (int skipFrames)
  73                 {
  74                         init_frames (skipFrames, false);
  75                 }
  76
  77                 public StackTrace (int skipFrames, bool fNeedFileInfo)
  78                 {
  79                         init_frames (skipFrames, fNeedFileInfo);
  80                 }
  81
  82                 void init_frames (int skipFrames, bool fNeedFileInfo)
  83                 {
  84                         if (skipFrames < 0)
  85                                 throw new ArgumentOutOfRangeException ("< 0", "skipFrames");
  86
  87                         StackFrame sf;
  88                         var l = new List<StackFrame> ();
  89
  90                         skipFrames += 2;
  91
  92                         while ((sf = new StackFrame (skipFrames, fNeedFileInfo)) != null &&
  93                                sf.GetMethod () != null) {
  94
  95                                 l.Add (sf);
  96                                 skipFrames++;
  97                         };
  98
  99                         debug_info = fNeedFileInfo;
 100                         frames = l.ToArray ();
 101                 }
 102
 103                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 104                 extern static StackFrame [] get_trace (Exception e, int skipFrames, bool fNeedFileInfo);
 105
 106                 public StackTrace (Exception e)
 107                         : this (e, METHODS_TO_SKIP, false)
 108                 {
 109                 }
 110
 111                 public StackTrace (Exception e, bool fNeedFileInfo)
 112                         : this (e, METHODS_TO_SKIP, fNeedFileInfo)
 113                 {
 114                 }
 115
 116                 public StackTrace (Exception e, int skipFrames)
 117                         : this (e, skipFrames, false)
 118                 {
 119                 }
 120
 121                 public StackTrace (Exception e, int skipFrames, bool fNeedFileInfo)
 122                         : this (e, skipFrames, fNeedFileInfo, false)
 123                 {
 124                 }
 125
 126                 internal StackTrace (Exception e, int skipFrames, bool fNeedFileInfo, bool returnNativeFrames)
 127                 {
 128                         if (e == null)
 129                                 throw new ArgumentNullException ("e");
 130                         if (skipFrames < 0)
 131                                 throw new ArgumentOutOfRangeException ("< 0", "skipFrames");
 132
 133                         frames = get_trace (e, skipFrames, fNeedFileInfo);
 134
 135                         if (!returnNativeFrames) {
 136                                 bool resize = false;
 137                                 for (int i = 0; i < frames.Length; ++i)
 138                                         if (frames [i].GetMethod () == null)
 139                                                 resize = true;
 140
 141                                 if (resize) {
 142                                         var l = new List<StackFrame> ();
 143
 144                                         for (int i = 0; i < frames.Length; ++i)
 145                                                 if (frames [i].GetMethod () != null)
 146                                                         l.Add (frames [i]);
 147
 148                                         frames = l.ToArray ();
 149                                 }
 150                         }
 151                 }
 152
 153                 public StackTrace (StackFrame frame)
 154                 {
 155                         this.frames = new StackFrame [1];
 156                         this.frames [0] = frame;
 157                 }
 158
 159                 [MonoLimitation ("Not possible to create StackTraces from other threads")]
 160                 [Obsolete]
 161                 public StackTrace (Thread targetThread, bool needFileInfo)
 162                 {
 163                         if (targetThread == Thread.CurrentThread){
 164                                 init_frames (METHODS_TO_SKIP, needFileInfo);
 165                                 return;
 166                         }
 167
 168                         throw new NotImplementedException ();
 169                 }
 170
 171                 public virtual int FrameCount {
 172                         get {
 173                                 return (frames == null) ? 0 : frames.Length;
 174                         }
 175                 }
 176
 177                 public virtual StackFrame GetFrame (int index)
 178                 {
 179                         if ((index < 0) || (index >= FrameCount)) {
 180                                 return null;
 181                         }
 182
 183                         return frames [index];
 184                 }
 185
 186                 [ComVisibleAttribute (false)]
 187                 public virtual StackFrame[] GetFrames ()
 188                 {
 189                         return frames;
 190                 }
 191
 192                 public override string ToString ()
 193                 {
 194                         string newline = String.Format ("{0}   {1} ", Environment.NewLine, Locale.GetText ("at"));
 195                         string unknown = Locale.GetText ("<unknown method>");
 196                         string debuginfo = Locale.GetText (" in {0}:line {1}");
 197                         StringBuilder sb = new StringBuilder ();
 198                         for (int i = 0; i < FrameCount; i++) {
 199                                 StackFrame frame = GetFrame (i);
 200                                 if (i > 0)
 201                                         sb.Append (newline);
 202                                 else
 203                                         sb.AppendFormat ("   {0} ", Locale.GetText ("at"));
 204                                 MethodBase method = frame.GetMethod ();
 205                                 if (method != null) {
 206                                         // Method information available
 207                                         sb.AppendFormat ("{0}.{1}", method.DeclaringType.FullName, method.Name);
 208                                         /* Append parameter information */
 209                                         sb.Append ("(");
 210                                         ParameterInfo[] p = method.GetParametersInternal ();
 211                                         for (int j = 0; j < p.Length; ++j) {
 212                                                 if (j > 0)
 213                                                         sb.Append (", ");
 214                                                 Type pt = p[j].ParameterType;
 215                                                 bool byref = pt.IsByRef;
 216                                                 if (byref)
 217                                                         pt = pt.GetElementType ();
 218                                                 if (pt.IsClass && pt.Namespace != String.Empty) {
 219                                                         sb.Append (pt.Namespace);
 220                                                         sb.Append (".");
 221                                                 }
 222                                                 sb.Append (pt.Name);
 223                                                 if (byref)
 224                                                         sb.Append (" ByRef");
 225                                                 sb.AppendFormat (" {0}", p [j].Name);
 226                                         }
 227                                         sb.Append (")");
 228                                 }
 229                                 else {
 230                                         // Method information not available
 231                                         sb.Append (unknown);
 232                                 }
 233
 234                                 if (debug_info) {
 235                                         // we were asked for debugging informations
 236                                         // but that doesn't mean we have the debug information available
 237                                         string fname = frame.GetSecureFileName ();
 238                                         if (fname != "<filename unknown>")
 239                                                 sb.AppendFormat (debuginfo, fname, frame.GetFileLineNumber ());
 240                                 }
 241                         }
 242                         return sb.ToString ();
 243                 }
 244
 245                 internal String ToString (TraceFormat traceFormat)
 246                 {
 247                         // TODO:
 248                         return ToString ();
 249                 }
 250         }
 251 }