mcs/class/Mono.CSharp.Debugger/MonoSymbolFile.cs

   1 //
   2 // System.Diagnostics.SymbolStore/MonoSymbolFile.cs
   3 //
   4 // Author:
   5 //   Martin Baulig (martin@gnome.org)
   6 //
   7 // (C) 2003 Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 using System;
  11 using System.Reflection;
  12 using System.Reflection.Emit;
  13 using System.Collections;
  14 using System.Text;
  15 using System.IO;
  16
  17 namespace Mono.CSharp.Debugger
  18 {
  19         public class MonoSymbolFileException : Exception
  20         {
  21                 public MonoSymbolFileException ()
  22                         : base ()
  23                 { }
  24
  25                 public MonoSymbolFileException (string message, params object[] args)
  26                         : base (String.Format (message, args))
  27                 { }
  28         }
  29
  30         internal class MyMemoryStream : Stream
  31         {
  32                 int length;
  33                 int real_length;
  34                 int position;
  35
  36                 int chunk_size = 4096;
  37                 ArrayList chunks = new ArrayList ();
  38
  39                 private struct Chunk {
  40                         public readonly int Offset;
  41                         public readonly int Length;
  42                         public byte[] Buffer;
  43
  44                         public Chunk (int offset, int length)
  45                         {
  46                                 this.Offset = offset;
  47                                 this.Length = length;
  48                                 this.Buffer = new Byte [length];
  49                         }
  50                 }
  51
  52                 public override long Position {
  53                         get { return position; }
  54
  55                         set {
  56                                 if (value > length)
  57                                         throw new ArgumentOutOfRangeException ();
  58
  59                                 position = (int) value;
  60                         }
  61                 }
  62
  63                 public override long Length {
  64                         get { return length; }
  65                 }
  66
  67                 public override bool CanRead {
  68                         get { return true; }
  69                 }
  70
  71                 public override bool CanWrite {
  72                         get { return true; }
  73                 }
  74
  75                 public override bool CanSeek {
  76                         get { return true; }
  77                 }
  78
  79                 public override void SetLength (long new_length)
  80                 {
  81                         if (new_length < length)
  82                                 throw new ArgumentException ();
  83
  84                         while (new_length >= real_length) {
  85                                 Chunk new_chunk = new Chunk (real_length, chunk_size);
  86                                 chunks.Add (new_chunk);
  87                                 real_length += chunk_size;
  88                         }
  89
  90                         length = (int) new_length;
  91                 }
  92
  93                 public override void Flush ()
  94                 { }
  95
  96                 public override long Seek (long offset, SeekOrigin origin)
  97                 {
  98                         int ref_point;
  99
 100                         switch (origin) {
 101                         case SeekOrigin.Begin:
 102                                 ref_point = 0;
 103                                 break;
 104                         case SeekOrigin.Current:
 105                                 ref_point = position;
 106                                 break;
 107                         case SeekOrigin.End:
 108                                 ref_point = length;
 109                                 break;
 110                         default:
 111                                 throw new ArgumentException ("Invalid SeekOrigin");
 112                         }
 113
 114                         if ((ref_point + offset < 0) || (offset > real_length))
 115                                 throw new ArgumentOutOfRangeException ();
 116
 117                         position = ref_point + (int) offset;
 118
 119                         return position;
 120                 }
 121
 122                 Chunk FindChunk (int offset)
 123                 {
 124                         return (Chunk) chunks [offset / chunk_size];
 125                 }
 126
 127                 public override int Read (byte[] buffer, int offset, int count)
 128                 {
 129                         int old_count = count;
 130
 131                         while (count > 0) {
 132                                 Chunk chunk = FindChunk (position);
 133                                 int coffset = position - chunk.Offset;
 134                                 int rest = chunk.Length - coffset;
 135                                 int size = System.Math.Min (count, rest);
 136
 137                                 Array.Copy (chunk.Buffer, coffset, buffer, offset, size);
 138                                 position += size;
 139                                 offset += size;
 140                                 count -= size;
 141                         }
 142
 143                         return old_count;
 144                 }
 145
 146                 public override void Write (byte[] buffer, int offset, int count)
 147                 {
 148                         if (position + count > length)
 149                                 SetLength (position + count);
 150
 151                         while (count > 0) {
 152                                 Chunk chunk = FindChunk (position);
 153                                 int coffset = position - chunk.Offset;
 154                                 int rest = chunk.Length - coffset;
 155                                 int size = System.Math.Min (count, rest);
 156
 157                                 Array.Copy (buffer, offset, chunk.Buffer, coffset, size);
 158                                 position += size;
 159                                 offset += size;
 160                                 count -= size;
 161                         }
 162                 }
 163
 164                 public byte[] GetContents ()
 165                 {
 166                         byte[] retval = new byte [length];
 167                         position = 0;
 168                         Read (retval, 0, length);
 169                         return retval;
 170                 }
 171         }
 172
 173         public class MonoSymbolFile : IDisposable
 174         {
 175                 ArrayList methods = new ArrayList ();
 176                 ArrayList sources = new ArrayList ();
 177                 Hashtable method_source_hash = new Hashtable ();
 178                 Hashtable type_hash = new Hashtable ();
 179
 180                 OffsetTable ot;
 181                 int last_type_index;
 182                 int last_method_index;
 183                 int last_source_index;
 184                 int last_namespace_index;
 185
 186                 public MonoSymbolFile ()
 187                 { }
 188
 189                 internal int AddSource (SourceFileEntry source)
 190                 {
 191                         sources.Add (source);
 192                         return ++last_source_index;
 193                 }
 194
 195                 internal int DefineType (Type type)
 196                 {
 197                         if (type_hash.Contains (type))
 198                                 return (int) type_hash [type];
 199
 200                         int index = ++last_type_index;
 201                         type_hash.Add (type, index);
 202                         return index;
 203                 }
 204
 205                 internal void AddMethod (MethodEntry entry)
 206                 {
 207                         methods.Add (entry);
 208                 }
 209
 210                 internal int GetNextTypeIndex ()
 211                 {
 212                         return ++last_type_index;
 213                 }
 214
 215                 internal int GetNextMethodIndex ()
 216                 {
 217                         return ++last_method_index;
 218                 }
 219
 220                 internal int GetNextNamespaceIndex ()
 221                 {
 222                         return ++last_namespace_index;
 223                 }
 224
 225                 internal void WriteString (BinaryWriter bw, string text)
 226                 {
 227                         byte[] data = Encoding.UTF8.GetBytes (text);
 228                         bw.Write ((int) data.Length);
 229                         bw.Write (data);
 230                         StringSize += data.Length;
 231                 }
 232
 233                 internal string ReadString (int offset)
 234                 {
 235                         int old_pos = (int) reader.BaseStream.Position;
 236                         reader.BaseStream.Position = offset;
 237                         int length = reader.ReadInt32 ();
 238
 239                         byte[] data = reader.ReadBytes (length);
 240                         string text = Encoding.UTF8.GetString (data);
 241                         reader.BaseStream.Position = old_pos;
 242                         return text;
 243                 }
 244
 245                 void Write (BinaryWriter bw)
 246                 {
 247                         // Magic number and file version.
 248                         bw.Write (OffsetTable.Magic);
 249                         bw.Write (OffsetTable.Version);
 250
 251                         //
 252                         // Offsets of file sections; we must write this after we're done
 253                         // writing the whole file, so we just reserve the space for it here.
 254                         //
 255                         long offset_table_offset = bw.BaseStream.Position;
 256                         ot.Write (bw);
 257
 258                         //
 259                         // Write data sections.
 260                         //
 261                         ot.DataSectionOffset = (int) bw.BaseStream.Position;
 262                         foreach (SourceFileEntry source in sources)
 263                                 source.WriteData (bw);
 264                         ot.DataSectionSize = (int) bw.BaseStream.Position - ot.DataSectionOffset;
 265
 266                         //
 267                         // Write method table.
 268                         //
 269                         ot.MethodTableOffset = (int) bw.BaseStream.Position;
 270                         for (int i = 0; i < methods.Count; i++) {
 271                                 MethodEntry entry = (MethodEntry) methods [i];
 272                                 entry.WriteIndex (bw);
 273                         }
 274                         ot.MethodTableSize = (int) bw.BaseStream.Position - ot.MethodTableOffset;
 275
 276                         //
 277                         // Write source table.
 278                         //
 279                         ot.SourceTableOffset = (int) bw.BaseStream.Position;
 280                         for (int i = 0; i < sources.Count; i++) {
 281                                 SourceFileEntry source = (SourceFileEntry) sources [i];
 282                                 source.Write (bw);
 283                         }
 284                         ot.SourceTableSize = (int) bw.BaseStream.Position - ot.SourceTableOffset;
 285
 286                         //
 287                         // Fixup offset table.
 288                         //
 289                         ot.TypeCount = last_type_index;
 290                         ot.MethodCount = methods.Count;
 291                         ot.SourceCount = sources.Count;
 292
 293                         //
 294                         // Write offset table.
 295                         //
 296                         ot.TotalFileSize = (int) bw.BaseStream.Position;
 297                         bw.Seek ((int) offset_table_offset, SeekOrigin.Begin);
 298                         ot.Write (bw);
 299                         bw.Seek (0, SeekOrigin.End);
 300                 }
 301
 302                 public byte[] CreateSymbolFile ()
 303                 {
 304                         if (reader != null)
 305                                 throw new InvalidOperationException ();
 306
 307                         using (MyMemoryStream stream = new MyMemoryStream ()) {
 308                                 Write (new BinaryWriter (stream));
 309                                 Console.WriteLine ("WROTE SYMFILE: {0} sources, {1} methods, {2} types, " +
 310                                                    "{3} line numbers, {4} locals, {5} namespaces, " +
 311                                                    "{6} bytes of string data",
 312                                                    SourceCount, MethodCount, TypeCount, LineNumberCount,
 313                                                    LocalCount, NamespaceCount, StringSize);
 314                                 Console.WriteLine (ot);
 315                                 return stream.GetContents ();
 316                         }
 317                 }
 318
 319                 // Stream stream;
 320                 BinaryReader reader;
 321                 Hashtable method_hash;
 322                 Hashtable source_file_hash;
 323
 324                 Hashtable method_name_hash;
 325                 Hashtable source_name_hash;
 326
 327                 protected MonoSymbolFile (Stream stream)
 328                 {
 329                         reader = new BinaryReader (stream);
 330
 331                         try {
 332                                 long magic = reader.ReadInt64 ();
 333                                 long version = reader.ReadInt32 ();
 334                                 if ((magic != OffsetTable.Magic) || (version != OffsetTable.Version))
 335                                         throw new MonoSymbolFileException ();
 336                                 ot = new OffsetTable (reader);
 337                         } catch {
 338                                 throw new MonoSymbolFileException ();
 339                         }
 340
 341                         method_hash = new Hashtable ();
 342                         source_file_hash = new Hashtable ();
 343                 }
 344
 345                 public static MonoSymbolFile ReadSymbolFile (Assembly assembly)
 346                 {
 347                         Stream stream = assembly.GetManifestResourceStream ("MonoSymbolFile");
 348                         if (stream == null)
 349                                 return null;
 350
 351                         return new MonoSymbolFile (stream);
 352                 }
 353
 354                 public int SourceCount {
 355                         get { return ot.SourceCount; }
 356                 }
 357
 358                 public int MethodCount {
 359                         get { return ot.MethodCount; }
 360                 }
 361
 362                 public int TypeCount {
 363                         get { return ot.TypeCount; }
 364                 }
 365
 366                 public int NamespaceCount {
 367                         get { return last_namespace_index; }
 368                 }
 369
 370                 internal int LineNumberCount = 0;
 371                 internal int LocalCount = 0;
 372                 internal int StringSize = 0;
 373
 374                 public SourceFileEntry GetSourceFile (int index)
 375                 {
 376                         if ((index < 1) || (index > ot.SourceCount))
 377                                 throw new ArgumentException ();
 378                         if (reader == null)
 379                                 throw new InvalidOperationException ();
 380
 381                         SourceFileEntry source = (SourceFileEntry) source_file_hash [index];
 382                         if (source != null)
 383                                 return source;
 384
 385                         reader.BaseStream.Position = ot.SourceTableOffset +
 386                                 SourceFileEntry.Size * (index - 1);
 387                         source = new SourceFileEntry (this, reader);
 388                         source_file_hash.Add (index, source);
 389                         return source;
 390                 }
 391
 392                 public SourceFileEntry[] Sources {
 393                         get {
 394                                 if (reader == null)
 395                                         throw new InvalidOperationException ();
 396
 397                                 SourceFileEntry[] retval = new SourceFileEntry [SourceCount];
 398                                 for (int i = 0; i < SourceCount; i++)
 399                                         retval [i] = GetSourceFile (i + 1);
 400                                 return retval;
 401                         }
 402                 }
 403
 404                 public MethodEntry GetMethod (int index)
 405                 {
 406                         if ((index < 1) || (index > ot.MethodCount))
 407                                 throw new ArgumentException ();
 408                         if (reader == null)
 409                                 throw new InvalidOperationException ();
 410
 411                         MethodEntry entry = (MethodEntry) method_hash [index];
 412                         if (entry != null)
 413                                 return entry;
 414
 415                         reader.BaseStream.Position = ot.MethodTableOffset + 8 * (index - 1);
 416                         reader.BaseStream.Position = reader.ReadInt32 ();
 417
 418                         entry = new MethodEntry (this, reader, index);
 419                         method_hash.Add (index, entry);
 420                         return entry;
 421                 }
 422
 423                 public MethodEntry[] Methods {
 424                         get {
 425                                 if (reader == null)
 426                                         throw new InvalidOperationException ();
 427
 428                                 MethodEntry[] retval = new MethodEntry [MethodCount];
 429                                 for (int i = 0; i < MethodCount; i++)
 430                                         retval [i] = GetMethod (i + 1);
 431                                 return retval;
 432                         }
 433                 }
 434
 435                 public MethodSourceEntry GetMethodSource (int index)
 436                 {
 437                         if ((index < 1) || (index > ot.MethodCount))
 438                                 throw new ArgumentException ();
 439                         if (reader == null)
 440                                 throw new InvalidOperationException ();
 441
 442                         object entry = method_source_hash [index];
 443                         if (entry != null)
 444                                 return (MethodSourceEntry) entry;
 445
 446                         MethodEntry method = GetMethod (index);
 447                         foreach (MethodSourceEntry source in method.SourceFile.Methods) {
 448                                 if (source.Index == index) {
 449                                         method_source_hash.Add (index, source);
 450                                         return source;
 451                                 }
 452                         }
 453
 454                         throw new MonoSymbolFileException ("Internal error.");
 455                 }
 456
 457                 public int FindMethod (string full_name)
 458                 {
 459                         if (reader == null)
 460                                 throw new InvalidOperationException ();
 461
 462                         if (method_name_hash == null) {
 463                                 method_name_hash = new Hashtable ();
 464
 465                                 for (int i = 0; i < ot.MethodCount; i++) {
 466                                         reader.BaseStream.Position = ot.MethodTableOffset + 8 * i;
 467
 468                                         int offset = reader.ReadInt32 ();
 469                                         int name_offset = reader.ReadInt32 ();
 470                                         string name = ReadString (name_offset);
 471
 472                                         method_name_hash.Add (name, i + 1);
 473                                 }
 474                         }
 475
 476                         object value = method_name_hash [full_name];
 477                         if (value == null)
 478                                 return -1;
 479                         return (int) value;
 480                 }
 481
 482                 public int FindSource (string file_name)
 483                 {
 484                         if (reader == null)
 485                                 throw new InvalidOperationException ();
 486
 487                         if (source_name_hash == null) {
 488                                 source_name_hash = new Hashtable ();
 489
 490                                 for (int i = 0; i < ot.SourceCount; i++) {
 491                                         SourceFileEntry source = GetSourceFile (i + 1);
 492
 493                                         source_name_hash.Add (source.FileName, i);
 494                                 }
 495                         }
 496
 497                         object value = source_name_hash [file_name];
 498                         if (value == null)
 499                                 return -1;
 500                         return (int) value;
 501                 }
 502
 503                 internal BinaryReader BinaryReader {
 504                         get {
 505                                 if (reader == null)
 506                                         throw new InvalidOperationException ();
 507
 508                                 return reader;
 509                         }
 510                 }
 511
 512                 void IDisposable.Dispose ()
 513                 {
 514                         Dispose (true);
 515                 }
 516
 517                 protected virtual void Dispose (bool disposing)
 518                 {
 519                         if (disposing) {
 520                                 if (reader != null) {
 521                                         reader.Close ();
 522                                         reader = null;
 523                                 }
 524                         }
 525                 }
 526         }
 527 }