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 MonoDebuggerSupport
 174         {
 175                 static GetTypeFunc get_type;
 176                 static GetMethodTokenFunc get_method_token;
 177                 static GetMethodFunc get_method;
 178                 static GetLocalTypeFromSignatureFunc local_type_from_sig;
 179
 180                 delegate Type GetTypeFunc (Assembly assembly, int token);
 181                 delegate int GetMethodTokenFunc (Assembly assembly, MethodBase method);
 182                 delegate MethodBase GetMethodFunc (Assembly assembly, int token);
 183                 delegate Type GetLocalTypeFromSignatureFunc (Assembly assembly, byte[] sig);
 184
 185                 static Delegate create_delegate (Type delegate_type, string name)
 186                 {
 187                         Type type = typeof (Assembly);
 188
 189                         MethodInfo mi = type.GetMethod (name, BindingFlags.Static |
 190                                                         BindingFlags.NonPublic);
 191                         if (mi == null)
 192                                 throw new Exception ("Can't find " + name);
 193
 194                         return Delegate.CreateDelegate (delegate_type, mi);
 195                 }
 196
 197                 static MonoDebuggerSupport ()
 198                 {
 199                         get_type = (GetTypeFunc) create_delegate (
 200                                 typeof (GetTypeFunc), "MonoDebugger_GetType");
 201
 202                         get_method_token = (GetMethodTokenFunc) create_delegate (
 203                                 typeof (GetMethodTokenFunc), "MonoDebugger_GetMethodToken");
 204
 205                         get_method = (GetMethodFunc) create_delegate (
 206                                 typeof (GetMethodFunc), "MonoDebugger_GetMethod");
 207
 208                         local_type_from_sig = (GetLocalTypeFromSignatureFunc) create_delegate (
 209                                 typeof (GetLocalTypeFromSignatureFunc),
 210                                 "MonoDebugger_GetLocalTypeFromSignature");
 211                 }
 212
 213                 public static Type GetType (Assembly assembly, int token)
 214                 {
 215                         return get_type (assembly, token);
 216                 }
 217
 218                 public static int GetMethodToken (MethodBase method)
 219                 {
 220                         return get_method_token (method.ReflectedType.Assembly, method);
 221                 }
 222
 223                 public static MethodBase GetMethod (Assembly assembly, int token)
 224                 {
 225                         return get_method (assembly, token);
 226                 }
 227
 228                 public static Type GetLocalTypeFromSignature (Assembly assembly, byte[] sig)
 229                 {
 230                         return local_type_from_sig (assembly, sig);
 231                 }
 232         }
 233
 234         public class MonoSymbolFile : IDisposable
 235         {
 236                 ArrayList methods = new ArrayList ();
 237                 ArrayList sources = new ArrayList ();
 238                 Hashtable method_source_hash = new Hashtable ();
 239                 Hashtable type_hash = new Hashtable ();
 240
 241                 OffsetTable ot;
 242                 int last_type_index;
 243                 int last_method_index;
 244                 int last_source_index;
 245                 int last_namespace_index;
 246
 247                 public MonoSymbolFile ()
 248                 { }
 249
 250                 internal int AddSource (SourceFileEntry source)
 251                 {
 252                         sources.Add (source);
 253                         return ++last_source_index;
 254                 }
 255
 256                 internal int DefineType (Type type)
 257                 {
 258                         if (type_hash.Contains (type))
 259                                 return (int) type_hash [type];
 260
 261                         int index = ++last_type_index;
 262                         type_hash.Add (type, index);
 263                         return index;
 264                 }
 265
 266                 internal void AddMethod (MethodEntry entry)
 267                 {
 268                         methods.Add (entry);
 269                 }
 270
 271                 internal int GetNextTypeIndex ()
 272                 {
 273                         return ++last_type_index;
 274                 }
 275
 276                 internal int GetNextMethodIndex ()
 277                 {
 278                         return ++last_method_index;
 279                 }
 280
 281                 internal int GetNextNamespaceIndex ()
 282                 {
 283                         return ++last_namespace_index;
 284                 }
 285
 286                 byte [] stringBuffer;
 287                 int maxCharsPerRound;
 288                 static Encoding enc = Encoding.UTF8;
 289
 290                 internal void WriteString (BinaryWriter bw, string s)
 291                 {
 292                         int len = enc.GetByteCount (s);
 293                         bw.Write (len);
 294                         StringSize += len;
 295
 296                         if (stringBuffer == null) {
 297                                 stringBuffer = new byte [512];
 298                                 maxCharsPerRound = 512 / enc.GetMaxByteCount (1);
 299                         }
 300
 301                         int chpos = 0;
 302                         int chrem = s.Length;
 303                         while (chrem > 0) {
 304                                 int cch = (chrem > maxCharsPerRound) ? maxCharsPerRound : chrem;
 305                                 int blen = enc.GetBytes (s, chpos, cch, stringBuffer, 0);
 306                                 bw.Write (stringBuffer, 0, blen);
 307
 308                                 chpos += cch;
 309                                 chrem -= cch;
 310                         }
 311                 }
 312
 313                 internal string ReadString (int offset)
 314                 {
 315                         int old_pos = (int) reader.BaseStream.Position;
 316                         reader.BaseStream.Position = offset;
 317                         int length = reader.ReadInt32 ();
 318
 319                         byte[] data = reader.ReadBytes (length);
 320                         string text = Encoding.UTF8.GetString (data);
 321                         reader.BaseStream.Position = old_pos;
 322                         return text;
 323                 }
 324
 325                 void Write (BinaryWriter bw)
 326                 {
 327                         // Magic number and file version.
 328                         bw.Write (OffsetTable.Magic);
 329                         bw.Write (OffsetTable.Version);
 330
 331                         //
 332                         // Offsets of file sections; we must write this after we're done
 333                         // writing the whole file, so we just reserve the space for it here.
 334                         //
 335                         long offset_table_offset = bw.BaseStream.Position;
 336                         ot.Write (bw);
 337
 338                         //
 339                         // Write data sections.
 340                         //
 341                         ot.DataSectionOffset = (int) bw.BaseStream.Position;
 342                         foreach (SourceFileEntry source in sources)
 343                                 source.WriteData (bw);
 344                         ot.DataSectionSize = (int) bw.BaseStream.Position - ot.DataSectionOffset;
 345
 346                         //
 347                         // Write method table.
 348                         //
 349                         ot.MethodTableOffset = (int) bw.BaseStream.Position;
 350                         for (int i = 0; i < methods.Count; i++) {
 351                                 MethodEntry entry = (MethodEntry) methods [i];
 352                                 entry.WriteIndex (bw);
 353                         }
 354                         ot.MethodTableSize = (int) bw.BaseStream.Position - ot.MethodTableOffset;
 355
 356                         //
 357                         // Write source table.
 358                         //
 359                         ot.SourceTableOffset = (int) bw.BaseStream.Position;
 360                         for (int i = 0; i < sources.Count; i++) {
 361                                 SourceFileEntry source = (SourceFileEntry) sources [i];
 362                                 source.Write (bw);
 363                         }
 364                         ot.SourceTableSize = (int) bw.BaseStream.Position - ot.SourceTableOffset;
 365
 366                         //
 367                         // Fixup offset table.
 368                         //
 369                         ot.TypeCount = last_type_index;
 370                         ot.MethodCount = methods.Count;
 371                         ot.SourceCount = sources.Count;
 372
 373                         //
 374                         // Write offset table.
 375                         //
 376                         ot.TotalFileSize = (int) bw.BaseStream.Position;
 377                         bw.Seek ((int) offset_table_offset, SeekOrigin.Begin);
 378                         ot.Write (bw);
 379                         bw.Seek (0, SeekOrigin.End);
 380                 }
 381
 382                 public byte[] CreateSymbolFile ()
 383                 {
 384                         if (reader != null)
 385                                 throw new InvalidOperationException ();
 386
 387                         using (MyMemoryStream stream = new MyMemoryStream ()) {
 388                                 Write (new BinaryWriter (stream));
 389                                 return stream.GetContents ();
 390                         }
 391                 }
 392
 393                 Assembly assembly;
 394                 BinaryReader reader;
 395                 Hashtable method_hash;
 396                 Hashtable source_file_hash;
 397
 398                 Hashtable method_token_hash;
 399                 Hashtable source_name_hash;
 400
 401                 protected MonoSymbolFile (Assembly assembly, Stream stream)
 402                 {
 403                         this.assembly = assembly;
 404
 405                         reader = new BinaryReader (stream);
 406
 407                         try {
 408                                 long magic = reader.ReadInt64 ();
 409                                 long version = reader.ReadInt32 ();
 410                                 if ((magic != OffsetTable.Magic) || (version != OffsetTable.Version))
 411                                         throw new MonoSymbolFileException ();
 412                                 ot = new OffsetTable (reader);
 413                         } catch {
 414                                 throw new MonoSymbolFileException ();
 415                         }
 416
 417                         method_hash = new Hashtable ();
 418                         source_file_hash = new Hashtable ();
 419                 }
 420
 421                 public static MonoSymbolFile ReadSymbolFile (Assembly assembly)
 422                 {
 423                         Stream stream = assembly.GetManifestResourceStream ("MonoSymbolFile");
 424                         if (stream == null)
 425                                 return null;
 426
 427                         return new MonoSymbolFile (assembly, stream);
 428                 }
 429
 430                 public Assembly Assembly {
 431                         get { return assembly; }
 432                 }
 433
 434                 public int SourceCount {
 435                         get { return ot.SourceCount; }
 436                 }
 437
 438                 public int MethodCount {
 439                         get { return ot.MethodCount; }
 440                 }
 441
 442                 public int TypeCount {
 443                         get { return ot.TypeCount; }
 444                 }
 445
 446                 public int NamespaceCount {
 447                         get { return last_namespace_index; }
 448                 }
 449
 450                 internal int LineNumberCount = 0;
 451                 internal int LocalCount = 0;
 452                 internal int StringSize = 0;
 453
 454                 public SourceFileEntry GetSourceFile (int index)
 455                 {
 456                         if ((index < 1) || (index > ot.SourceCount))
 457                                 throw new ArgumentException ();
 458                         if (reader == null)
 459                                 throw new InvalidOperationException ();
 460
 461                         SourceFileEntry source = (SourceFileEntry) source_file_hash [index];
 462                         if (source != null)
 463                                 return source;
 464
 465                         reader.BaseStream.Position = ot.SourceTableOffset +
 466                                 SourceFileEntry.Size * (index - 1);
 467                         source = new SourceFileEntry (this, reader);
 468                         source_file_hash.Add (index, source);
 469                         return source;
 470                 }
 471
 472                 public SourceFileEntry[] Sources {
 473                         get {
 474                                 if (reader == null)
 475                                         throw new InvalidOperationException ();
 476
 477                                 SourceFileEntry[] retval = new SourceFileEntry [SourceCount];
 478                                 for (int i = 0; i < SourceCount; i++)
 479                                         retval [i] = GetSourceFile (i + 1);
 480                                 return retval;
 481                         }
 482                 }
 483
 484                 public MethodIndexEntry GetMethodIndexEntry (int index)
 485                 {
 486                         int old_pos = (int) reader.BaseStream.Position;
 487                         reader.BaseStream.Position = ot.MethodTableOffset +
 488                                 MethodIndexEntry.Size * (index - 1);
 489                         MethodIndexEntry ie = new MethodIndexEntry (reader);
 490                         reader.BaseStream.Position = old_pos;
 491                         return ie;
 492                 }
 493
 494                 public MethodEntry GetMethodByToken (int token)
 495                 {
 496                         if (reader == null)
 497                                 throw new InvalidOperationException ();
 498
 499                         if (method_token_hash == null) {
 500                                 method_token_hash = new Hashtable ();
 501
 502                                 for (int i = 0; i < MethodCount; i++) {
 503                                         MethodIndexEntry ie = GetMethodIndexEntry (i + 1);
 504
 505                                         method_token_hash.Add (ie.Token, i + 1);
 506                                 }
 507                         }
 508
 509                         object value = method_token_hash [token];
 510                         if (value == null)
 511                                 return null;
 512
 513                         return GetMethod ((int) value);
 514                 }
 515
 516                 public MethodEntry GetMethod (MethodBase method)
 517                 {
 518                         if (reader == null)
 519                                 throw new InvalidOperationException ();
 520                         int token = MonoDebuggerSupport.GetMethodToken (method);
 521                         return GetMethodByToken (token);
 522                 }
 523
 524                 public MethodEntry GetMethod (int index)
 525                 {
 526                         if ((index < 1) || (index > ot.MethodCount))
 527                                 throw new ArgumentException ();
 528                         if (reader == null)
 529                                 throw new InvalidOperationException ();
 530
 531                         MethodEntry entry = (MethodEntry) method_hash [index];
 532                         if (entry != null)
 533                                 return entry;
 534
 535                         MethodIndexEntry ie = GetMethodIndexEntry (index);
 536                         reader.BaseStream.Position = ie.FileOffset;
 537
 538                         entry = new MethodEntry (this, reader, index);
 539                         method_hash.Add (index, entry);
 540                         return entry;
 541                 }
 542
 543                 public MethodEntry[] Methods {
 544                         get {
 545                                 if (reader == null)
 546                                         throw new InvalidOperationException ();
 547
 548                                 MethodEntry[] retval = new MethodEntry [MethodCount];
 549                                 for (int i = 0; i < MethodCount; i++)
 550                                         retval [i] = GetMethod (i + 1);
 551                                 return retval;
 552                         }
 553                 }
 554
 555                 public MethodSourceEntry GetMethodSource (int index)
 556                 {
 557                         if ((index < 1) || (index > ot.MethodCount))
 558                                 throw new ArgumentException ();
 559                         if (reader == null)
 560                                 throw new InvalidOperationException ();
 561
 562                         object entry = method_source_hash [index];
 563                         if (entry != null)
 564                                 return (MethodSourceEntry) entry;
 565
 566                         MethodEntry method = GetMethod (index);
 567                         foreach (MethodSourceEntry source in method.SourceFile.Methods) {
 568                                 if (source.Index == index) {
 569                                         method_source_hash.Add (index, source);
 570                                         return source;
 571                                 }
 572                         }
 573
 574                         throw new MonoSymbolFileException ("Internal error.");
 575                 }
 576
 577                 public int FindSource (string file_name)
 578                 {
 579                         if (reader == null)
 580                                 throw new InvalidOperationException ();
 581
 582                         if (source_name_hash == null) {
 583                                 source_name_hash = new Hashtable ();
 584
 585                                 for (int i = 0; i < ot.SourceCount; i++) {
 586                                         SourceFileEntry source = GetSourceFile (i + 1);
 587
 588                                         source_name_hash.Add (source.FileName, i);
 589                                 }
 590                         }
 591
 592                         object value = source_name_hash [file_name];
 593                         if (value == null)
 594                                 return -1;
 595                         return (int) value;
 596                 }
 597
 598                 internal BinaryReader BinaryReader {
 599                         get {
 600                                 if (reader == null)
 601                                         throw new InvalidOperationException ();
 602
 603                                 return reader;
 604                         }
 605                 }
 606
 607                 void IDisposable.Dispose ()
 608                 {
 609                         Dispose (true);
 610                 }
 611
 612                 protected virtual void Dispose (bool disposing)
 613                 {
 614                         if (disposing) {
 615                                 if (reader != null) {
 616                                         reader.Close ();
 617                                         reader = null;
 618                                 }
 619                         }
 620                 }
 621         }
 622 }