mcs/class/Mono.Debugger.Soft/Mono.Debugger.Soft/Connection.cs

   1 using System;
   2 using System.IO;
   3 using System.Net;
   4 using System.Net.Sockets;
   5 using System.Threading;
   6 using System.Collections.Generic;
   7 using System.Text;
   8 using Mono.Cecil.Metadata;
   9
  10 namespace Mono.Debugger.Soft
  11 {
  12         class VersionInfo {
  13                 public string VMVersion {
  14                         get; set;
  15                 }
  16
  17                 public int MajorVersion {
  18                         get; set;
  19                 }
  20
  21                 public int MinorVersion {
  22                         get; set;
  23                 }
  24         }
  25
  26         class DebugInfo {
  27                 public int max_il_offset;
  28                 public string filename;
  29                 public int[] il_offsets;
  30                 public int[] line_numbers;
  31         }
  32
  33         struct FrameInfo {
  34                 public long id;
  35                 public long method;
  36                 public int il_offset;
  37                 public StackFrameFlags flags;
  38         }
  39
  40         class TypeInfo {
  41                 public string ns, name, full_name;
  42                 public long assembly, module, base_type, element_type;
  43                 public int token, rank, attributes;
  44                 public bool is_byref, is_pointer, is_primitive, is_valuetype, is_enum;
  45                 public long[] nested;
  46         }
  47
  48         class MethodInfo {
  49                 public int attributes, iattributes, token;
  50         }
  51
  52         class MethodBodyInfo {
  53                 public byte[] il;
  54         }
  55
  56         struct ParamInfo {
  57                 public int call_conv;
  58                 public int param_count;
  59                 public int generic_param_count;
  60                 public long ret_type;
  61                 public long[] param_types;
  62                 public string[] param_names;
  63         }
  64
  65         struct LocalsInfo {
  66                 public long[] types;
  67                 public string[] names;
  68                 public int[] live_range_start;
  69                 public int[] live_range_end;
  70         }
  71
  72         struct PropInfo {
  73                 public long id;
  74                 public string name;
  75                 public long get_method, set_method;
  76                 public int attrs;
  77         }
  78
  79         class CattrNamedArgInfo {
  80                 public bool is_property;
  81                 public long id;
  82                 public ValueImpl value;
  83         }
  84
  85         class CattrInfo {
  86                 public long ctor_id;
  87                 public ValueImpl[] ctor_args;
  88                 public CattrNamedArgInfo[] named_args;
  89         }
  90
  91         class ThreadInfo {
  92                 public bool is_thread_pool;
  93         }
  94
  95         enum ValueTypeId {
  96                 VALUE_TYPE_ID_NULL = 0xf0,
  97                 VALUE_TYPE_ID_TYPE = 0xf1
  98         }
  99
 100         enum InvokeFlags {
 101                 NONE = 0x0,
 102                 DISABLE_BREAKPOINTS = 0x1,
 103                 SINGLE_THREADED = 0x2
 104         }
 105
 106         class ValueImpl {
 107                 public ElementType Type; /* or one of the VALUE_TYPE_ID constants */
 108                 public long Objid;
 109                 public object Value;
 110                 public long Klass; // For ElementType.ValueType
 111                 public ValueImpl[] Fields; // for ElementType.ValueType
 112                 public bool IsEnum; // For ElementType.ValueType
 113                 public long Id; /* For VALUE_TYPE_ID_TYPE */
 114         }
 115
 116         class ModuleInfo {
 117                 public string Name, ScopeName, FQName, Guid;
 118                 public long Assembly;
 119         }
 120
 121         enum TokenType {
 122                 STRING = 0,
 123                 TYPE = 1,
 124                 FIELD = 2,
 125                 METHOD = 3,
 126                 UNKNOWN = 4
 127         }
 128
 129         enum StackFrameFlags {
 130                 DEBUGGER_INVOKE = 1
 131         }
 132
 133         class ResolvedToken {
 134                 public TokenType Type;
 135                 public string Str;
 136                 public long Id;
 137         }
 138
 139         class Modifier {
 140         }
 141
 142         class CountModifier : Modifier {
 143                 public int Count {
 144                         get; set;
 145                 }
 146         }
 147
 148         class LocationModifier : Modifier {
 149                 public long Method {
 150                         get; set;
 151                 }
 152
 153                 public long Location {
 154                         get; set;
 155                 }
 156         }
 157
 158         class StepModifier : Modifier {
 159                 public long Thread {
 160                         get; set;
 161                 }
 162
 163                 public int Depth {
 164                         get; set;
 165                 }
 166
 167                 public int Size {
 168                         get; set;
 169                 }
 170         }
 171
 172         class ThreadModifier : Modifier {
 173                 public long Thread {
 174                         get; set;
 175                 }
 176         }
 177
 178         class ExceptionModifier : Modifier {
 179                 public long Type {
 180                         get; set;
 181                 }
 182                 public bool Caught {
 183                         get; set;
 184                 }
 185                 public bool Uncaught {
 186                         get; set;
 187                 }
 188         }
 189
 190         class AssemblyModifier : Modifier {
 191                 public long[] Assemblies {
 192                         get; set;
 193                 }
 194         }
 195
 196         public enum ErrorCode {
 197                 NONE = 0,
 198                 INVALID_OBJECT = 20,
 199                 INVALID_FIELDID = 25,
 200                 INVALID_FRAMEID = 30,
 201                 NOT_IMPLEMENTED = 100,
 202                 NOT_SUSPENDED = 101,
 203                 INVALID_ARGUMENT = 102
 204         }
 205
 206         public class ErrorHandlerEventArgs : EventArgs {
 207
 208                 public ErrorCode ErrorCode {
 209                         get; set;
 210                 }
 211         }
 212
 213         /*
 214          * Represents the connection to the debuggee
 215          */
 216         class Connection
 217         {
 218                 /*
 219                  * The protocol and the packet format is based on JDWP, the differences
 220                  * are in the set of supported events, and the commands.
 221                  */
 222                 public const string HANDSHAKE_STRING = "DWP-Handshake";
 223
 224                 public const int HEADER_LENGTH = 11;
 225
 226                 /*
 227                  * Th version of the wire-protocol implemented by the library. The library
 228                  * and the debuggee can communicate if they implement the same major version,
 229                  * and the debuggee's minor version is <= the library's minor version.
 230                  */
 231                 public const int MAJOR_VERSION = 2;
 232                 public const int MINOR_VERSION = 1;
 233
 234                 enum WPSuspendPolicy {
 235                         NONE = 0,
 236                         EVENT_THREAD = 1,
 237                         ALL = 2
 238                 }
 239
 240                 enum CommandSet {
 241                         VM = 1,
 242                         OBJECT_REF = 9,
 243                         STRING_REF = 10,
 244                         THREAD = 11,
 245                         ARRAY_REF = 13,
 246                         EVENT_REQUEST = 15,
 247                         STACK_FRAME = 16,
 248                         APPDOMAIN = 20,
 249                         ASSEMBLY = 21,
 250                         METHOD = 22,
 251                         TYPE = 23,
 252                         MODULE = 24,
 253                         EVENT = 64
 254                 }
 255
 256                 enum EventKind {
 257                         VM_START = 0,
 258                         VM_DEATH = 1,
 259                         THREAD_START = 2,
 260                         THREAD_DEATH = 3,
 261                         APPDOMAIN_CREATE = 4, // Not in JDI
 262                         APPDOMAIN_UNLOAD = 5, // Not in JDI
 263                         METHOD_ENTRY = 6,
 264                         METHOD_EXIT = 7,
 265                         ASSEMBLY_LOAD = 8,
 266                         ASSEMBLY_UNLOAD = 9,
 267                         BREAKPOINT = 10,
 268                         STEP = 11,
 269                         TYPE_LOAD = 12,
 270                         EXCEPTION = 13
 271                 }
 272
 273                 enum ModifierKind {
 274                         COUNT = 1,
 275                         THREAD_ONLY = 3,
 276                         LOCATION_ONLY = 7,
 277                         EXCEPTION_ONLY = 8,
 278                         STEP = 10,
 279                         ASSEMBLY_ONLY = 11
 280                 }
 281
 282                 enum CmdVM {
 283                         VERSION = 1,
 284                         ALL_THREADS = 2,
 285                         SUSPEND = 3,
 286                         RESUME = 4,
 287                         EXIT = 5,
 288                         DISPOSE = 6,
 289                         INVOKE_METHOD = 7
 290                 }
 291
 292                 enum CmdEvent {
 293                         COMPOSITE = 100
 294                 }
 295
 296                 enum CmdThread {
 297                         GET_FRAME_INFO = 1,
 298                         GET_NAME = 2,
 299                         GET_STATE = 3,
 300                         GET_INFO = 4
 301                 }
 302
 303                 enum CmdEventRequest {
 304                         SET = 1,
 305                         CLEAR = 2,
 306                         CLEAR_ALL_BREAKPOINTS = 3
 307                 }
 308
 309                 enum CmdAppDomain {
 310                         GET_ROOT_DOMAIN = 1,
 311                         GET_FRIENDLY_NAME = 2,
 312                         GET_ASSEMBLIES = 3,
 313                         GET_ENTRY_ASSEMBLY = 4,
 314                         CREATE_STRING = 5,
 315                         GET_CORLIB = 6,
 316                         CREATE_BOXED_VALUE = 7
 317                 }
 318
 319                 enum CmdAssembly {
 320                         GET_LOCATION = 1,
 321                         GET_ENTRY_POINT = 2,
 322                         GET_MANIFEST_MODULE = 3,
 323                         GET_OBJECT = 4,
 324                         GET_TYPE = 5,
 325                         GET_NAME = 6
 326                 }
 327
 328                 enum CmdModule {
 329                         GET_INFO = 1,
 330                 }
 331
 332                 enum CmdMethod {
 333                         GET_NAME = 1,
 334                         GET_DECLARING_TYPE = 2,
 335                         GET_DEBUG_INFO = 3,
 336                         GET_PARAM_INFO = 4,
 337                         GET_LOCALS_INFO = 5,
 338                         GET_INFO = 6,
 339                         GET_BODY = 7,
 340                         RESOLVE_TOKEN = 8
 341                 }
 342
 343                 enum CmdType {
 344                         GET_INFO = 1,
 345                         GET_METHODS = 2,
 346                         GET_FIELDS = 3,
 347                         GET_VALUES = 4,
 348                         GET_OBJECT = 5,
 349                         GET_SOURCE_FILES = 6,
 350                         SET_VALUES = 7,
 351                         IS_ASSIGNABLE_FROM = 8,
 352                         GET_PROPERTIES = 9,
 353                         GET_CATTRS = 10,
 354                         GET_FIELD_CATTRS = 11,
 355                         GET_PROPERTY_CATTRS = 12
 356                 }
 357
 358                 enum CmdStackFrame {
 359                         GET_VALUES = 1,
 360                         GET_THIS = 2,
 361                         SET_VALUES = 3
 362                 }
 363
 364                 enum CmdArrayRef {
 365                         GET_LENGTH = 1,
 366                         GET_VALUES = 2,
 367                         SET_VALUES = 3
 368                 }
 369
 370                 enum CmdStringRef {
 371                         GET_VALUE = 1
 372                 }
 373
 374                 enum CmdObjectRef {
 375                         GET_TYPE = 1,
 376                         GET_VALUES = 2,
 377                         IS_COLLECTED = 3,
 378                         GET_ADDRESS = 4,
 379                         GET_DOMAIN = 5,
 380                         SET_VALUES = 6
 381                 }
 382
 383                 class Header {
 384                         public int id;
 385                         public int command_set;
 386                         public int command;
 387                         public int flags;
 388                 }
 389
 390                 public static int GetPacketLength (byte[] header) {
 391                         int offset = 0;
 392                         return decode_int (header, ref offset);
 393                 }
 394
 395                 public static bool IsReplyPacket (byte[] packet) {
 396                         int offset = 8;
 397                         return decode_byte (packet, ref offset) == 0x80;
 398                 }
 399
 400                 public static int GetPacketId (byte[] packet) {
 401                         int offset = 4;
 402                         return decode_int (packet, ref offset);
 403                 }
 404
 405                 static int decode_byte (byte[] packet, ref int offset) {
 406                         return packet [offset++];
 407                 }
 408
 409                 static int decode_short (byte[] packet, ref int offset) {
 410                         int res = ((int)packet [offset] << 8) | (int)packet [offset + 1];
 411                         offset += 2;
 412                         return res;
 413                 }
 414
 415                 static int decode_int (byte[] packet, ref int offset) {
 416                         int res = ((int)packet [offset] << 24) | ((int)packet [offset + 1] << 16) | ((int)packet [offset + 2] << 8) | (int)packet [offset + 3];
 417                         offset += 4;
 418                         return res;
 419                 }
 420
 421                 static long decode_id (byte[] packet, ref int offset) {
 422                         return decode_int (packet, ref offset);
 423                 }
 424
 425                 static long decode_long (byte[] packet, ref int offset) {
 426                         uint high = (uint)decode_int (packet, ref offset);
 427                         uint low = (uint)decode_int (packet, ref offset);
 428
 429                         return (long)(((ulong)high << 32) | (ulong)low);
 430                 }
 431
 432                 public static SuspendPolicy decode_suspend_policy (int suspend_policy) {
 433                         switch ((WPSuspendPolicy)suspend_policy) {
 434                         case WPSuspendPolicy.NONE:
 435                                 return SuspendPolicy.None;
 436                         case WPSuspendPolicy.EVENT_THREAD:
 437                                 return SuspendPolicy.EventThread;
 438                         case WPSuspendPolicy.ALL:
 439                                 return SuspendPolicy.All;
 440                         default:
 441                                 throw new NotImplementedException ();
 442                         }
 443                 }
 444
 445                 static Header decode_command_header (byte[] packet) {
 446                         int offset = 0;
 447                         Header res = new Header ();
 448
 449                         decode_int (packet, ref offset);
 450                         res.id = decode_int (packet, ref offset);
 451                         res.flags = decode_byte (packet, ref offset);
 452                         res.command_set = decode_byte (packet, ref offset);
 453                         res.command = decode_byte (packet, ref offset);
 454
 455                         return res;
 456                 }
 457
 458                 static void encode_byte (byte[] buf, int b, ref int offset) {
 459                         buf [offset] = (byte)b;
 460                         offset ++;
 461                 }
 462
 463                 static void encode_int (byte[] buf, int i, ref int offset) {
 464                         buf [offset] = (byte)((i >> 24) & 0xff);
 465                         buf [offset + 1] = (byte)((i >> 16) & 0xff);
 466                         buf [offset + 2] = (byte)((i >> 8) & 0xff);
 467                         buf [offset + 3] = (byte)((i >> 0) & 0xff);
 468                         offset += 4;
 469                 }
 470
 471                 static void encode_id (byte[] buf, long id, ref int offset) {
 472                         encode_int (buf, (int)id, ref offset);
 473                 }
 474
 475                 static void encode_long (byte[] buf, long l, ref int offset) {
 476                         encode_int (buf, (int)((l >> 32) & 0xffffffff), ref offset);
 477                         encode_int (buf, (int)(l & 0xffffffff), ref offset);
 478                 }
 479
 480                 public static byte[] EncodePacket (int id, int commandSet, int command, byte[] data, int dataLen) {
 481                         byte[] buf = new byte [dataLen + 11];
 482                         int offset = 0;
 483
 484                         encode_int (buf, buf.Length, ref offset);
 485                         encode_int (buf, id, ref offset);
 486                         encode_byte (buf, 0, ref offset);
 487                         encode_byte (buf, commandSet, ref offset);
 488                         encode_byte (buf, command, ref offset);
 489
 490                         for (int i = 0; i < dataLen; ++i)
 491                                 buf [offset + i] = data [i];
 492
 493                         return buf;
 494                 }
 495
 496                 class PacketReader {
 497                         byte[] packet;
 498                         int offset;
 499
 500                         public PacketReader (byte[] packet) {
 501                                 this.packet = packet;
 502
 503                                 // For event packets
 504                                 Header header = decode_command_header (packet);
 505                                 CommandSet = (CommandSet)header.command_set;
 506                                 Command = header.command;
 507
 508                                 // For reply packets
 509                                 offset = 0;
 510                                 ReadInt (); // length
 511                                 ReadInt (); // id
 512                                 ReadByte (); // flags
 513                                 ErrorCode = ReadShort ();
 514                         }
 515
 516                         public CommandSet CommandSet {
 517                                 get; set;
 518                         }
 519
 520                         public int Command {
 521                                 get; set;
 522                         }
 523
 524                         public int ErrorCode {
 525                                 get; set;
 526                         }
 527
 528                         public int Offset {
 529                                 get {
 530                                         return offset;
 531                                 }
 532                         }
 533
 534                         public int ReadByte () {
 535                                 return decode_byte (packet, ref offset);
 536                         }
 537
 538                         public int ReadShort () {
 539                                 return decode_short (packet, ref offset);
 540                         }
 541
 542                         public int ReadInt () {
 543                                 return decode_int (packet, ref offset);
 544                         }
 545
 546                         public long ReadId () {
 547                                 return decode_id (packet, ref offset);
 548                         }
 549
 550                         public long ReadLong () {
 551                                 return decode_long (packet, ref offset);
 552                         }
 553
 554                         public float ReadFloat () {
 555                                 float f = DataConverter.FloatFromBE (packet, offset);
 556                                 offset += 4;
 557                                 return f;
 558                         }
 559
 560                         public double ReadDouble () {
 561                                 double d = DataConverter.DoubleFromBE (packet, offset);
 562                                 offset += 8;
 563                                 return d;
 564                         }
 565
 566                         public string ReadString () {
 567                                 int len = decode_int (packet, ref offset);
 568                                 string res = new String (Encoding.UTF8.GetChars (packet, offset, len));
 569                                 offset += len;
 570                                 return res;
 571                         }
 572
 573                         public ValueImpl ReadValue () {
 574                                 ElementType etype = (ElementType)ReadByte ();
 575
 576                                 switch (etype) {
 577                                 case ElementType.Void:
 578                                         return new ValueImpl { Type = etype };
 579                                 case ElementType.I1:
 580                                         return new ValueImpl { Type = etype, Value = (sbyte)ReadInt () };
 581                                 case ElementType.U1:
 582                                         return new ValueImpl { Type = etype, Value = (byte)ReadInt () };
 583                                 case ElementType.Boolean:
 584                                         return new ValueImpl { Type = etype, Value = ReadInt () != 0 };
 585                                 case ElementType.I2:
 586                                         return new ValueImpl { Type = etype, Value = (short)ReadInt () };
 587                                 case ElementType.U2:
 588                                         return new ValueImpl { Type = etype, Value = (ushort)ReadInt () };
 589                                 case ElementType.Char:
 590                                         return new ValueImpl { Type = etype, Value = (char)ReadInt () };
 591                                 case ElementType.I4:
 592                                         return new ValueImpl { Type = etype, Value = ReadInt () };
 593                                 case ElementType.U4:
 594                                         return new ValueImpl { Type = etype, Value = (uint)ReadInt () };
 595                                 case ElementType.I8:
 596                                         return new ValueImpl { Type = etype, Value = ReadLong () };
 597                                 case ElementType.U8:
 598                                         return new ValueImpl { Type = etype, Value = (ulong)ReadLong () };
 599                                 case ElementType.R4:
 600                                         return new ValueImpl { Type = etype, Value = ReadFloat () };
 601                                 case ElementType.R8:
 602                                         return new ValueImpl { Type = etype, Value = ReadDouble () };
 603                                 case ElementType.I:
 604                                 case ElementType.U:
 605                                 case ElementType.Ptr:
 606                                         // FIXME: The client and the debuggee might have different word sizes
 607                                         return new ValueImpl { Type = etype, Value = ReadLong () };
 608                                 case ElementType.String:
 609                                 case ElementType.SzArray:
 610                                 case ElementType.Class:
 611                                 case ElementType.Array:
 612                                 case ElementType.Object:
 613                                         long objid = ReadId ();
 614                                         return new ValueImpl () { Type = etype, Objid = objid };
 615                                 case ElementType.ValueType:
 616                                         bool is_enum = ReadByte () == 1;
 617                                         long klass = ReadId ();
 618                                         long nfields = ReadInt ();
 619                                         ValueImpl[] fields = new ValueImpl [nfields];
 620                                         for (int i = 0; i < nfields; ++i)
 621                                                 fields [i] = ReadValue ();
 622                                         return new ValueImpl () { Type = etype, Klass = klass, Fields = fields, IsEnum = is_enum };
 623                                 case (ElementType)ValueTypeId.VALUE_TYPE_ID_NULL:
 624                                         return new ValueImpl { Type = etype };
 625                                 case (ElementType)ValueTypeId.VALUE_TYPE_ID_TYPE:
 626                                         return new ValueImpl () { Type = etype, Id = ReadId () };
 627                                 default:
 628                                         throw new NotImplementedException ("Unable to handle type " + etype);
 629                                 }
 630                         }
 631                 }
 632
 633                 class PacketWriter {
 634
 635                         byte[] data;
 636                         int offset;
 637
 638                         public PacketWriter () {
 639                                 // FIXME:
 640                                 data = new byte [1024];
 641                                 offset = 0;
 642                         }
 643
 644                         public PacketWriter WriteByte (byte val) {
 645                                 encode_byte (data, val, ref offset);
 646                                 return this;
 647                         }
 648
 649                         public PacketWriter WriteInt (int val) {
 650                                 encode_int (data, val, ref offset);
 651                                 return this;
 652                         }
 653
 654                         public PacketWriter WriteId (long id) {
 655                                 encode_id (data, id, ref offset);
 656                                 return this;
 657                         }
 658
 659                         public PacketWriter WriteLong (long val) {
 660                                 encode_long (data, val, ref offset);
 661                                 return this;
 662                         }
 663
 664                         public PacketWriter WriteFloat (float f) {
 665                                 byte[] b = DataConverter.GetBytesBE (f);
 666                                 for (int i = 0; i < 4; ++i)
 667                                         data [offset + i] = b [i];
 668                                 offset += 4;
 669                                 return this;
 670                         }
 671
 672                         public PacketWriter WriteDouble (double d) {
 673                                 byte[] b = DataConverter.GetBytesBE (d);
 674                                 for (int i = 0; i < 8; ++i)
 675                                         data [offset + i] = b [i];
 676                                 offset += 8;
 677                                 return this;
 678                         }
 679
 680                         public PacketWriter WriteInts (int[] ids) {
 681                                 for (int i = 0; i < ids.Length; ++i)
 682                                         WriteInt (ids [i]);
 683                                 return this;
 684                         }
 685
 686                         public PacketWriter WriteIds (long[] ids) {
 687                                 for (int i = 0; i < ids.Length; ++i)
 688                                         WriteId (ids [i]);
 689                                 return this;
 690                         }
 691
 692                         public PacketWriter WriteString (string s) {
 693                                 encode_int (data, s.Length, ref offset);
 694                                 byte[] b = Encoding.UTF8.GetBytes (s);
 695                                 Buffer.BlockCopy (b, 0, data, offset, b.Length);
 696                                 offset += b.Length;
 697                                 return this;
 698                         }
 699
 700                         public PacketWriter WriteBool (bool val) {
 701                                 WriteByte (val ? (byte)1 : (byte)0);
 702                                 return this;
 703                         }
 704
 705                         public PacketWriter WriteValue (ValueImpl v) {
 706                                 ElementType t;
 707
 708                                 if (v.Value != null)
 709                                         t = TypeCodeToElementType (Type.GetTypeCode (v.Value.GetType ()));
 710                                 else
 711                                         t = v.Type;
 712                                 WriteByte ((byte)t);
 713                                 switch (t) {
 714                                 case ElementType.Boolean:
 715                                         WriteInt ((bool)v.Value ? 1 : 0);
 716                                         break;
 717                                 case ElementType.Char:
 718                                         WriteInt ((int)(char)v.Value);
 719                                         break;
 720                                 case ElementType.I1:
 721                                         WriteInt ((int)(sbyte)v.Value);
 722                                         break;
 723                                 case ElementType.U1:
 724                                         WriteInt ((int)(byte)v.Value);
 725                                         break;
 726                                 case ElementType.I2:
 727                                         WriteInt ((int)(short)v.Value);
 728                                         break;
 729                                 case ElementType.U2:
 730                                         WriteInt ((int)(ushort)v.Value);
 731                                         break;
 732                                 case ElementType.I4:
 733                                         WriteInt ((int)(int)v.Value);
 734                                         break;
 735                                 case ElementType.U4:
 736                                         WriteInt ((int)(uint)v.Value);
 737                                         break;
 738                                 case ElementType.I8:
 739                                         WriteLong ((long)(long)v.Value);
 740                                         break;
 741                                 case ElementType.U8:
 742                                         WriteLong ((long)(ulong)v.Value);
 743                                         break;
 744                                 case ElementType.R4:
 745                                         WriteFloat ((float)v.Value);
 746                                         break;
 747                                 case ElementType.R8:
 748                                         WriteDouble ((double)v.Value);
 749                                         break;
 750                                 case ElementType.String:
 751                                 case ElementType.SzArray:
 752                                 case ElementType.Class:
 753                                 case ElementType.Array:
 754                                 case ElementType.Object:
 755                                         WriteId (v.Objid);
 756                                         break;
 757                                 case ElementType.ValueType:
 758                                         // FIXME:
 759                                         if (v.IsEnum)
 760                                                 throw new NotImplementedException ();
 761                                         WriteByte (0);
 762                                         WriteId (v.Klass);
 763                                         WriteInt (v.Fields.Length);
 764                                         for (int i = 0; i < v.Fields.Length; ++i)
 765                                                 WriteValue (v.Fields [i]);
 766                                         break;
 767                                 case (ElementType)ValueTypeId.VALUE_TYPE_ID_NULL:
 768                                         break;
 769                                 default:
 770                                         throw new NotImplementedException ();
 771                                 }
 772
 773                                 return this;
 774                         }
 775
 776                         public PacketWriter WriteValues (ValueImpl[] values) {
 777                                 for (int i = 0; i < values.Length; ++i)
 778                                         WriteValue (values [i]);
 779                                 return this;
 780                         }
 781
 782                         public byte[] Data {
 783                                 get {
 784                                         return data;
 785                                 }
 786                         }
 787
 788                         public int Offset {
 789                                 get {
 790                                         return offset;
 791                                 }
 792                         }
 793                 }
 794
 795                 delegate void ReplyCallback (int packet_id, byte[] packet);
 796
 797                 Socket socket;
 798                 bool closed;
 799                 Thread receiver_thread;
 800                 Dictionary<int, byte[]> reply_packets;
 801                 Dictionary<int, ReplyCallback> reply_cbs;
 802                 object reply_packets_monitor;
 803
 804                 public event EventHandler<ErrorHandlerEventArgs> ErrorHandler;
 805
 806                 public Connection (Socket socket) {
 807                         this.socket = socket;
 808                         //socket.SetSocketOption (SocketOptionLevel.IP, SocketOptionName.NoDelay, 1);
 809                         closed = false;
 810                         reply_packets = new Dictionary<int, byte[]> ();
 811                         reply_cbs = new Dictionary<int, ReplyCallback> ();
 812                         reply_packets_monitor = new Object ();
 813                 }
 814
 815                 int Receive (byte[] buf, int buf_offset, int len) {
 816                         int offset = 0;
 817
 818                         while (offset < len) {
 819                                 int n = socket.Receive (buf, buf_offset + offset, len - offset, SocketFlags.None);
 820
 821                                 if (n == 0)
 822                                         return offset;
 823                                 offset += n;
 824                         }
 825
 826                         return offset;
 827                 }
 828
 829                 public VersionInfo Version;
 830
 831                 // Do the wire protocol handshake
 832                 public void Connect () {
 833                         byte[] buf = new byte [HANDSHAKE_STRING.Length];
 834                         char[] cbuf = new char [buf.Length];
 835
 836                         // FIXME: Add a timeout
 837                         int n = Receive (buf, 0, buf.Length);
 838                         if (n == 0)
 839                                 throw new IOException ("DWP Handshake failed.");
 840                         for (int i = 0; i < buf.Length; ++i)
 841                                 cbuf [i] = (char)buf [i];
 842
 843                         if (new String (cbuf) != HANDSHAKE_STRING)
 844                                 throw new IOException ("DWP Handshake failed.");
 845
 846                         socket.Send (buf);
 847
 848                         receiver_thread = new Thread (new ThreadStart (receiver_thread_main));
 849                         receiver_thread.Start ();
 850
 851                         Version = VM_GetVersion ();
 852                 }
 853
 854                 public EndPoint EndPoint {
 855                         get {
 856                                 return socket.RemoteEndPoint;
 857                         }
 858                 }
 859
 860                 public byte[] ReadPacket () {
 861                         // FIXME: Throw ClosedConnectionException () if the connection is closed
 862                         // FIXME: Throw ClosedConnectionException () if another thread closes the connection
 863                         // FIXME: Locking
 864                         byte[] header = new byte [HEADER_LENGTH];
 865
 866                         int len = Receive (header, 0, header.Length);
 867                         if (len == 0)
 868                                 return new byte [0];
 869                         if (len != HEADER_LENGTH) {
 870                                 // FIXME:
 871                                 throw new IOException ("Packet of length " + len + " is read.");
 872                         }
 873
 874                         int packetLength = GetPacketLength (header);
 875                         if (packetLength < 11)
 876                                 throw new IOException ("Invalid packet length.");
 877
 878                         if (packetLength == 11) {
 879                                 return header;
 880                         } else {
 881                                 byte[] buf = new byte [packetLength];
 882                                 for (int i = 0; i < header.Length; ++i)
 883                                         buf [i] = header [i];
 884                                 len = Receive (buf, header.Length, packetLength - header.Length);
 885                                 if (len != packetLength - header.Length)
 886                                         throw new IOException ();
 887                                 return buf;
 888                         }
 889                 }
 890
 891                 public void WritePacket (byte[] packet) {
 892                         // FIXME: Throw ClosedConnectionException () if the connection is closed
 893                         // FIXME: Throw ClosedConnectionException () if another thread closes the connection
 894                         // FIXME: Locking
 895                         socket.Send (packet);
 896                 }
 897
 898                 public void Close () {
 899                         closed = true;
 900                 }
 901
 902                 public bool IsClosed {
 903                         get {
 904                                 return closed;
 905                         }
 906                 }
 907
 908                 bool disconnected;
 909
 910                 void receiver_thread_main () {
 911                         while (true) {
 912                                 try {
 913                                         bool res = ReceivePacket ();
 914                                         if (!res)
 915                                                 break;
 916                                 } catch (Exception ex) {
 917                                         Console.WriteLine (ex);
 918                                         break;
 919                                 }
 920                         }
 921
 922                         lock (reply_packets_monitor) {
 923                                 disconnected = true;
 924                                 Monitor.PulseAll (reply_packets_monitor);
 925                         }
 926                         EventHandler.VMDisconnect (0, 0, null);
 927                 }
 928
 929                 bool ReceivePacket () {
 930                                 byte[] packet = ReadPacket ();
 931
 932                                 if (packet.Length == 0) {
 933                                         return false;
 934                                 }
 935
 936                                 if (IsReplyPacket (packet)) {
 937                                         int id = GetPacketId (packet);
 938                                         ReplyCallback cb = null;
 939                                         lock (reply_packets_monitor) {
 940                                                 reply_cbs.TryGetValue (id, out cb);
 941                                                 if (cb == null) {
 942                                                         reply_packets [id] = packet;
 943                                                         Monitor.PulseAll (reply_packets_monitor);
 944                                                 }
 945                                         }
 946
 947                                         if (cb != null)
 948                                                 cb.Invoke (id, packet);
 949                                 } else {
 950                                         PacketReader r = new PacketReader (packet);
 951
 952                                         if (r.CommandSet == CommandSet.EVENT && r.Command == (int)CmdEvent.COMPOSITE) {
 953                                                 r.ReadByte (); // suspend_policy
 954                                                 int nevents = r.ReadInt ();
 955
 956                                                 for (int i = 0; i < nevents; ++i) {
 957                                                         EventKind kind = (EventKind)r.ReadByte ();
 958                                                         int req_id = r.ReadInt ();
 959
 960                                                         if (kind == EventKind.VM_START) {
 961                                                                 long thread_id = r.ReadId ();
 962                                                                 EventHandler.VMStart (req_id, thread_id, null);
 963                                                         } else if (kind == EventKind.VM_DEATH) {
 964                                                                 EventHandler.VMDeath (req_id, 0, null);
 965                                                         } else if (kind == EventKind.THREAD_START) {
 966                                                                 long thread_id = r.ReadId ();
 967                                                                 EventHandler.ThreadStart (req_id, thread_id, thread_id);
 968                                                         } else if (kind == EventKind.THREAD_DEATH) {
 969                                                                 long thread_id = r.ReadId ();
 970                                                                 EventHandler.ThreadDeath (req_id, thread_id, thread_id);
 971                                                         } else if (kind == EventKind.ASSEMBLY_LOAD) {
 972                                                                 long thread_id = r.ReadId ();
 973                                                                 long id = r.ReadId ();
 974                                                                 EventHandler.AssemblyLoad (req_id, thread_id, id);
 975                                                         } else if (kind == EventKind.ASSEMBLY_UNLOAD) {
 976                                                                 long thread_id = r.ReadId ();
 977                                                                 long id = r.ReadId ();
 978                                                                 EventHandler.AssemblyUnload (req_id, thread_id, id);
 979                                                         } else if (kind == EventKind.TYPE_LOAD) {
 980                                                                 long thread_id = r.ReadId ();
 981                                                                 long id = r.ReadId ();
 982                                                                 EventHandler.TypeLoad (req_id, thread_id, id);
 983                                                         } else if (kind == EventKind.METHOD_ENTRY) {
 984                                                                 long thread_id = r.ReadId ();
 985                                                                 long id = r.ReadId ();
 986                                                                 EventHandler.MethodEntry (req_id, thread_id, id);
 987                                                         } else if (kind == EventKind.METHOD_EXIT) {
 988                                                                 long thread_id = r.ReadId ();
 989                                                                 long id = r.ReadId ();
 990                                                                 EventHandler.MethodExit (req_id, thread_id, id);
 991                                                         } else if (kind == EventKind.BREAKPOINT) {
 992                                                                 long thread_id = r.ReadId ();
 993                                                                 long id = r.ReadId ();
 994                                                                 long loc = r.ReadLong ();
 995                                                                 EventHandler.Breakpoint (req_id, thread_id, id, loc);
 996                                                         } else if (kind == EventKind.STEP) {
 997                                                                 long thread_id = r.ReadId ();
 998                                                                 long id = r.ReadId ();
 999                                                                 long loc = r.ReadLong ();
1000                                                                 EventHandler.Step (req_id, thread_id, id, loc);
1001                                                         } else if (kind == EventKind.EXCEPTION) {
1002                                                                 long thread_id = r.ReadId ();
1003                                                                 long id = r.ReadId ();
1004                                                                 long loc = 0; // FIXME
1005                                                                 EventHandler.Exception (req_id, thread_id, id, loc);
1006                                                         } else if (kind == EventKind.APPDOMAIN_CREATE) {
1007                                                                 long thread_id = r.ReadId ();
1008                                                                 long id = r.ReadId ();
1009                                                                 EventHandler.AppDomainCreate (req_id, thread_id, id);
1010                                                         } else if (kind == EventKind.APPDOMAIN_UNLOAD) {
1011                                                                 long thread_id = r.ReadId ();
1012                                                                 long id = r.ReadId ();
1013                                                                 EventHandler.AppDomainUnload (req_id, thread_id, id);
1014                                                         } else {
1015                                                                 throw new NotImplementedException ("Unknown event kind: " + kind);
1016                                                         }
1017                                                 }
1018                                         }
1019                                 }
1020
1021                                 return true;
1022                 }
1023
1024                 public IEventHandler EventHandler {
1025                         get; set;
1026                 }
1027
1028                 /* Send a request and call cb when a result is received */
1029                 void Send (CommandSet command_set, int command, PacketWriter packet, Action<PacketReader> cb) {
1030                         int id = IdGenerator;
1031
1032                         lock (reply_packets_monitor) {
1033                                 reply_cbs [id] = delegate (int packet_id, byte[] p) {
1034                                         /* Run the callback on a tp thread to avoid blocking the receive thread */
1035                                         PacketReader r = new PacketReader (p);
1036                                         cb.BeginInvoke (r, null, null);
1037                                 };
1038                         }
1039
1040                         if (packet == null)
1041                                 WritePacket (EncodePacket (id, (int)command_set, command, null, 0));
1042                         else
1043                                 WritePacket (EncodePacket (id, (int)command_set, command, packet.Data, packet.Offset));
1044                 }
1045
1046                 PacketReader SendReceive (CommandSet command_set, int command, PacketWriter packet) {
1047                         int id = IdGenerator;
1048
1049                         if (packet == null)
1050                                 WritePacket (EncodePacket (id, (int)command_set, command, null, 0));
1051                         else
1052                                 WritePacket (EncodePacket (id, (int)command_set, command, packet.Data, packet.Offset));
1053
1054                         int packetId = id;
1055
1056                         /* Wait for the reply packet */
1057                         while (true) {
1058                                 lock (reply_packets_monitor) {
1059                                         if (reply_packets.ContainsKey (packetId)) {
1060                                                 byte[] reply = reply_packets [packetId];
1061                                                 reply_packets.Remove (packetId);
1062                                                 PacketReader r = new PacketReader (reply);
1063                                                 if (r.ErrorCode != 0) {
1064                                                         if (ErrorHandler != null)
1065                                                                 ErrorHandler (this, new ErrorHandlerEventArgs () { ErrorCode = (ErrorCode)r.ErrorCode });
1066                                                         throw new NotImplementedException ("No error handler set.");
1067                                                 } else {
1068                                                         return r;
1069                                                 }
1070                                         } else {
1071                                                 if (disconnected)
1072                                                         throw new VMDisconnectedException ();
1073                                                 Monitor.Wait (reply_packets_monitor);
1074                                         }
1075                                 }
1076                         }
1077                 }
1078
1079                 PacketReader SendReceive (CommandSet command_set, int command) {
1080                         return SendReceive (command_set, command, null);
1081                 }
1082
1083                 int packet_id_generator;
1084
1085                 int IdGenerator {
1086                         get {
1087                                 return Interlocked.Increment (ref packet_id_generator);
1088                         }
1089                 }
1090
1091                 CattrInfo[] ReadCattrs (PacketReader r) {
1092                         CattrInfo[] res = new CattrInfo [r.ReadInt ()];
1093                         for (int i = 0; i < res.Length; ++i) {
1094                                 CattrInfo info = new CattrInfo ();
1095                                 info.ctor_id = r.ReadId ();
1096                                 info.ctor_args = new ValueImpl [r.ReadInt ()];
1097                                 for (int j = 0; j < info.ctor_args.Length; ++j) {
1098                                         info.ctor_args [j] = r.ReadValue ();
1099                                 }
1100                                 info.named_args = new CattrNamedArgInfo [r.ReadInt ()];
1101                                 for (int j = 0; j < info.named_args.Length; ++j) {
1102                                         CattrNamedArgInfo arg = new CattrNamedArgInfo ();
1103                                         int arg_type = r.ReadByte ();
1104                                         arg.is_property = arg_type == 0x54;
1105                                         arg.id = r.ReadId ();
1106                                         arg.value = r.ReadValue ();
1107                                         info.named_args [j] = arg;
1108                                 }
1109                                 res [i] = info;
1110                         }
1111                         return res;
1112                 }
1113
1114                 static ElementType TypeCodeToElementType (TypeCode c) {
1115                         switch (c) {
1116                         case TypeCode.Boolean:
1117                                 return ElementType.Boolean;
1118                         case TypeCode.Char:
1119                                 return ElementType.Char;
1120                         case TypeCode.SByte:
1121                                 return ElementType.I1;
1122                         case TypeCode.Byte:
1123                                 return ElementType.U1;
1124                         case TypeCode.Int16:
1125                                 return ElementType.I2;
1126                         case TypeCode.UInt16:
1127                                 return ElementType.U2;
1128                         case TypeCode.Int32:
1129                                 return ElementType.I4;
1130                         case TypeCode.UInt32:
1131                                 return ElementType.U4;
1132                         case TypeCode.Int64:
1133                                 return ElementType.I8;
1134                         case TypeCode.UInt64:
1135                                 return ElementType.U8;
1136                         case TypeCode.Single:
1137                                 return ElementType.R4;
1138                         case TypeCode.Double:
1139                                 return ElementType.R8;
1140                         default:
1141                                 throw new NotImplementedException ();
1142                         }
1143                 }
1144
1145                 /*
1146                  * Implementation of debugger commands
1147                  */
1148
1149                 public VersionInfo VM_GetVersion () {
1150                         var res = SendReceive (CommandSet.VM, (int)CmdVM.VERSION, null);
1151                         VersionInfo info = new VersionInfo ();
1152                         info.VMVersion = res.ReadString ();
1153                         info.MajorVersion = res.ReadInt ();
1154                         info.MinorVersion = res.ReadInt ();
1155                         return info;
1156                 }
1157
1158                 public long[] VM_GetThreads () {
1159                         var res = SendReceive (CommandSet.VM, (int)CmdVM.ALL_THREADS, null);
1160                         int len = res.ReadInt ();
1161                         long[] arr = new long [len];
1162                         for (int i = 0; i < len; ++i)
1163                                 arr [i] = res.ReadId ();
1164                         return arr;
1165                 }
1166
1167                 public void VM_Suspend () {
1168                         SendReceive (CommandSet.VM, (int)CmdVM.SUSPEND);
1169                 }
1170
1171                 public void VM_Resume () {
1172                         SendReceive (CommandSet.VM, (int)CmdVM.RESUME);
1173                 }
1174
1175                 public void VM_Exit (int exitCode) {
1176                         SendReceive (CommandSet.VM, (int)CmdVM.EXIT, new PacketWriter ().WriteInt (exitCode));
1177                 }
1178
1179                 public void VM_Dispose () {
1180                         SendReceive (CommandSet.VM, (int)CmdVM.DISPOSE);
1181                 }
1182
1183                 public ValueImpl VM_InvokeMethod (long thread, long method, ValueImpl this_arg, ValueImpl[] arguments, InvokeFlags flags, out ValueImpl exc) {
1184                         exc = null;
1185                         PacketReader r = SendReceive (CommandSet.VM, (int)CmdVM.INVOKE_METHOD, new PacketWriter ().WriteId (thread).WriteInt ((int)flags).WriteId (method).WriteValue (this_arg).WriteInt (arguments.Length).WriteValues (arguments));
1186                         if (r.ReadByte () == 0) {
1187                                 exc = r.ReadValue ();
1188                                 return null;
1189                         } else {
1190                                 return r.ReadValue ();
1191                         }
1192                 }
1193
1194                 public delegate void InvokeMethodCallback (ValueImpl v, ValueImpl exc, ErrorCode error, object state);
1195
1196                 public void VM_BeginInvokeMethod (long thread, long method, ValueImpl this_arg, ValueImpl[] arguments, InvokeFlags flags, InvokeMethodCallback callback, object state) {
1197                         Send (CommandSet.VM, (int)CmdVM.INVOKE_METHOD, new PacketWriter ().WriteId (thread).WriteInt ((int)flags).WriteId (method).WriteValue (this_arg).WriteInt (arguments.Length).WriteValues (arguments), delegate (PacketReader r) {
1198                                         ValueImpl v, exc;
1199
1200                                         if (r.ErrorCode != 0) {
1201                                                 callback (null, null, (ErrorCode)r.ErrorCode, state);
1202                                         } else {
1203                                                 if (r.ReadByte () == 0) {
1204                                                         exc = r.ReadValue ();
1205                                                         v = null;
1206                                                 } else {
1207                                                         v = r.ReadValue ();
1208                                                         exc = null;
1209                                                 }
1210
1211                                                 callback (v, exc, 0, state);
1212                                         }
1213                                 });
1214                 }
1215
1216                 /*
1217                  * DOMAIN
1218                  */
1219
1220                 public long RootDomain {
1221                         get {
1222                                 return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_ROOT_DOMAIN, null).ReadId ();
1223                         }
1224                 }
1225
1226                 public string Domain_GetName (long id) {
1227                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_FRIENDLY_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1228                 }
1229
1230                 public long[] Domain_GetAssemblies (long id) {
1231                         var res = SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_ASSEMBLIES, new PacketWriter ().WriteId (id));
1232                         int count = res.ReadInt ();
1233                         long[] assemblies = new long [count];
1234                         for (int i = 0; i < count; ++i)
1235                                 assemblies [i] = res.ReadId ();
1236                         return assemblies;
1237                 }
1238
1239                 public long Domain_GetEntryAssembly (long id) {
1240                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_ENTRY_ASSEMBLY, new PacketWriter ().WriteId (id)).ReadId ();
1241                 }
1242
1243                 public long Domain_GetCorlib (long id) {
1244                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_CORLIB, new PacketWriter ().WriteId (id)).ReadId ();
1245                 }
1246
1247                 public long Domain_CreateString (long id, string s) {
1248                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.CREATE_STRING, new PacketWriter ().WriteId (id).WriteString (s)).ReadId ();
1249                 }
1250
1251                 public long Domain_CreateBoxedValue (long id, long type_id, ValueImpl v) {
1252                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.CREATE_BOXED_VALUE, new PacketWriter ().WriteId (id).WriteId (type_id).WriteValue (v)).ReadId ();
1253                 }
1254
1255                 /*
1256                  * METHOD
1257                  */
1258
1259                 public string Method_GetName (long id) {
1260                         return SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1261                 }
1262
1263                 public long Method_GetDeclaringType (long id) {
1264                         return SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_DECLARING_TYPE, new PacketWriter ().WriteId (id)).ReadId ();
1265                 }
1266
1267                 public DebugInfo Method_GetDebugInfo (long id) {
1268                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_DEBUG_INFO, new PacketWriter ().WriteId (id));
1269
1270                         DebugInfo info = new DebugInfo ();
1271                         info.max_il_offset = res.ReadInt ();
1272                         info.filename = res.ReadString ();
1273
1274                         int n_il_offsets = res.ReadInt ();
1275                         info.il_offsets = new int [n_il_offsets];
1276                         info.line_numbers = new int [n_il_offsets];
1277                         for (int i = 0; i < n_il_offsets; ++i) {
1278                                 info.il_offsets [i] = res.ReadInt ();
1279                                 info.line_numbers [i] = res.ReadInt ();
1280                         }
1281
1282                         return info;
1283                 }
1284
1285                 public ParamInfo Method_GetParamInfo (long id) {
1286                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_PARAM_INFO, new PacketWriter ().WriteId (id));
1287
1288                         ParamInfo info = new ParamInfo ();
1289                         info.call_conv = res.ReadInt ();
1290                         info.param_count = res.ReadInt ();
1291                         info.generic_param_count = res.ReadInt ();
1292                         info.ret_type = res.ReadId ();
1293                         info.param_types = new long [info.param_count];
1294                         for (int i = 0; i < info.param_count; ++i)
1295                                 info.param_types [i] = res.ReadId ();
1296                         info.param_names = new string [info.param_count];
1297                         for (int i = 0; i < info.param_count; ++i)
1298                                 info.param_names [i] = res.ReadString ();
1299
1300                         return info;
1301                 }
1302
1303                 public LocalsInfo Method_GetLocalsInfo (long id) {
1304                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_LOCALS_INFO, new PacketWriter ().WriteId (id));
1305
1306                         LocalsInfo info = new LocalsInfo ();
1307                         int nlocals = res.ReadInt ();
1308                         info.types = new long [nlocals];
1309                         for (int i = 0; i < nlocals; ++i)
1310                                 info.types [i] = res.ReadId ();
1311                         info.names = new string [nlocals];
1312                         for (int i = 0; i < nlocals; ++i)
1313                                 info.names [i] = res.ReadString ();
1314                         info.live_range_start = new int [nlocals];
1315                         info.live_range_end = new int [nlocals];
1316                         for (int i = 0; i < nlocals; ++i) {
1317                                 info.live_range_start [i] = res.ReadInt ();
1318                                 info.live_range_end [i] = res.ReadInt ();
1319                         }
1320
1321                         return info;
1322                 }
1323
1324                 public MethodInfo Method_GetInfo (long id) {
1325                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_INFO, new PacketWriter ().WriteId (id));
1326
1327                         MethodInfo info = new MethodInfo ();
1328                         info.attributes = res.ReadInt ();
1329                         info.iattributes = res.ReadInt ();
1330                         info.token = res.ReadInt ();
1331
1332                         return info;
1333                 }
1334
1335                 public MethodBodyInfo Method_GetBody (long id) {
1336                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_BODY, new PacketWriter ().WriteId (id));
1337
1338                         MethodBodyInfo info = new MethodBodyInfo ();
1339                         info.il = new byte [res.ReadInt ()];
1340                         for (int i = 0; i < info.il.Length; ++i)
1341                                 info.il [i] = (byte)res.ReadByte ();
1342
1343                         return info;
1344                 }
1345
1346                 public ResolvedToken Method_ResolveToken (long id, int token) {
1347                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.RESOLVE_TOKEN, new PacketWriter ().WriteId (id).WriteInt (token));
1348
1349                         TokenType type = (TokenType)res.ReadByte ();
1350                         switch (type) {
1351                         case TokenType.STRING:
1352                                 return new ResolvedToken () { Type = type, Str = res.ReadString () };
1353                         case TokenType.TYPE:
1354                         case TokenType.METHOD:
1355                         case TokenType.FIELD:
1356                                 return new ResolvedToken () { Type = type, Id = res.ReadId () };
1357                         case TokenType.UNKNOWN:
1358                                 return new ResolvedToken () { Type = type };
1359                         default:
1360                                 throw new NotImplementedException ();
1361                         }
1362                 }
1363
1364                 /*
1365                  * THREAD
1366                  */
1367
1368                 public string Thread_GetName (long id) {
1369                         return SendReceive (CommandSet.THREAD, (int)CmdThread.GET_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1370                 }
1371
1372                 public FrameInfo[] Thread_GetFrameInfo (long id, int start_frame, int length) {
1373                         var res = SendReceive (CommandSet.THREAD, (int)CmdThread.GET_FRAME_INFO, new PacketWriter ().WriteId (id).WriteInt (start_frame).WriteInt (length));
1374                         int count = res.ReadInt ();
1375
1376                         var frames = new FrameInfo [count];
1377                         for (int i = 0; i < count; ++i) {
1378                                 frames [i].id = res.ReadInt ();
1379                                 frames [i].method = res.ReadId ();
1380                                 frames [i].il_offset = res.ReadInt ();
1381                                 frames [i].flags = (StackFrameFlags)res.ReadByte ();
1382                         }
1383                         return frames;
1384                 }
1385
1386                 public int Thread_GetState (long id) {
1387                         return SendReceive (CommandSet.THREAD, (int)CmdThread.GET_STATE, new PacketWriter ().WriteId (id)).ReadInt ();
1388                 }
1389
1390                 public ThreadInfo Thread_GetInfo (long id) {
1391                         PacketReader r = SendReceive (CommandSet.THREAD, (int)CmdThread.GET_INFO, new PacketWriter ().WriteId (id));
1392
1393                         ThreadInfo res = new ThreadInfo () { is_thread_pool = r.ReadByte () > 0 ? true : false };
1394
1395                         return res;
1396                 }
1397
1398                 /*
1399                  * MODULE
1400                  */
1401
1402                 public ModuleInfo Module_GetInfo (long id) {
1403                         PacketReader r = SendReceive (CommandSet.MODULE, (int)CmdModule.GET_INFO, new PacketWriter ().WriteId (id));
1404                         ModuleInfo info = new ModuleInfo { Name = r.ReadString (), ScopeName = r.ReadString (), FQName = r.ReadString (), Guid = r.ReadString (), Assembly = r.ReadId () };
1405                         return info;
1406                 }
1407
1408                 /*
1409                  * ASSEMBLY
1410                  */
1411
1412                 public string Assembly_GetLocation (long id) {
1413                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_LOCATION, new PacketWriter ().WriteId (id)).ReadString ();
1414                 }
1415
1416                 public long Assembly_GetEntryPoint (long id) {
1417                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_ENTRY_POINT, new PacketWriter ().WriteId (id)).ReadId ();
1418                 }
1419
1420                 public long Assembly_GetManifestModule (long id) {
1421                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_MANIFEST_MODULE, new PacketWriter ().WriteId (id)).ReadId ();
1422                 }
1423
1424                 public long Assembly_GetObject (long id) {
1425                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_OBJECT, new PacketWriter ().WriteId (id)).ReadId ();
1426                 }
1427
1428                 public long Assembly_GetType (long id, string name, bool ignoreCase) {
1429                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_TYPE, new PacketWriter ().WriteId (id).WriteString (name).WriteBool (ignoreCase)).ReadId ();
1430                 }
1431
1432                 public string Assembly_GetName (long id) {
1433                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1434                 }
1435
1436                 /*
1437                  * TYPE
1438                  */
1439
1440                 public TypeInfo Type_GetInfo (long id) {
1441                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_INFO, new PacketWriter ().WriteId (id));
1442                         TypeInfo res = new TypeInfo ();
1443
1444                         res.ns = r.ReadString ();
1445                         res.name = r.ReadString ();
1446                         res.full_name = r.ReadString ();
1447                         res.assembly = r.ReadId ();
1448                         res.module = r.ReadId ();
1449                         res.base_type = r.ReadId ();
1450                         res.element_type = r.ReadId ();
1451                         res.token = r.ReadInt ();
1452                         res.rank = r.ReadByte ();
1453                         res.attributes = r.ReadInt ();
1454                         int b = r.ReadByte ();
1455                         res.is_byref = (b & 1) != 0;
1456                         res.is_pointer = (b & 2) != 0;
1457                         res.is_primitive = (b & 4) != 0;
1458                         res.is_valuetype = (b & 8) != 0;
1459                         res.is_enum = (b & 16) != 0;
1460
1461                         int nested_len = r.ReadInt ();
1462                         res.nested = new long [nested_len];
1463                         for (int i = 0; i < nested_len; ++i)
1464                                 res.nested [i] = r.ReadId ();
1465
1466                         return res;
1467                 }
1468
1469                 public long[] Type_GetMethods (long id) {
1470                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_METHODS, new PacketWriter ().WriteId (id));
1471
1472                         int n = r.ReadInt ();
1473                         long[] res = new long [n];
1474                         for (int i = 0; i < n; ++i)
1475                                 res [i] = r.ReadId ();
1476                         return res;
1477                 }
1478
1479                 public long[] Type_GetFields (long id, out string[] names, out long[] types, out int[] attrs) {
1480                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_FIELDS, new PacketWriter ().WriteId (id));
1481
1482                         int n = r.ReadInt ();
1483                         long[] res = new long [n];
1484                         names = new string [n];
1485                         types = new long [n];
1486                         attrs = new int [n];
1487                         for (int i = 0; i < n; ++i) {
1488                                 res [i] = r.ReadId ();
1489                                 names [i] = r.ReadString ();
1490                                 types [i] = r.ReadId ();
1491                                 attrs [i] = r.ReadInt ();
1492                         }
1493                         return res;
1494                 }
1495
1496                 public PropInfo[] Type_GetProperties (long id) {
1497                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_PROPERTIES, new PacketWriter ().WriteId (id));
1498
1499                         int n = r.ReadInt ();
1500                         PropInfo[] res = new PropInfo [n];
1501                         for (int i = 0; i < n; ++i) {
1502                                 res [i] = new PropInfo ();
1503                                 res [i].id = r.ReadId ();
1504                                 res [i].name = r.ReadString ();
1505                                 res [i].get_method = r.ReadId ();
1506                                 res [i].set_method = r.ReadId ();
1507                                 res [i].attrs = r.ReadInt ();
1508                         }
1509
1510                         return res;
1511                 }
1512
1513                 public long Type_GetObject (long id) {
1514                         return SendReceive (CommandSet.TYPE, (int)CmdType.GET_OBJECT, new PacketWriter ().WriteId (id)).ReadId ();
1515                 }
1516
1517                 public ValueImpl[] Type_GetValues (long id, long[] fields) {
1518                         int len = fields.Length;
1519                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_VALUES, new PacketWriter ().WriteId (id).WriteInt (len).WriteIds (fields));
1520
1521                         ValueImpl[] res = new ValueImpl [len];
1522                         for (int i = 0; i < len; ++i)
1523                                 res [i] = r.ReadValue ();
1524                         return res;
1525                 }
1526
1527                 public void Type_SetValues (long id, long[] fields, ValueImpl[] values) {
1528                         SendReceive (CommandSet.TYPE, (int)CmdType.SET_VALUES, new PacketWriter ().WriteId (id).WriteInt (fields.Length).WriteIds (fields).WriteValues (values));
1529                 }
1530
1531                 public string[] Type_GetSourceFiles (long id) {
1532                         var r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_SOURCE_FILES, new PacketWriter ().WriteId (id));
1533                         int len = r.ReadInt ();
1534                         string[] res = new string [len];
1535                         for (int i = 0; i < len; ++i)
1536                                 res [i] = r.ReadString ();
1537                         return res;
1538                 }
1539
1540                 public bool Type_IsAssignableFrom (long id, long c_id) {
1541                         return SendReceive (CommandSet.TYPE, (int)CmdType.IS_ASSIGNABLE_FROM, new PacketWriter ().WriteId (id).WriteId (c_id)).ReadByte () > 0;
1542                 }
1543
1544                 public CattrInfo[] Type_GetCustomAttributes (long id, long attr_type_id, bool inherit) {
1545                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_CATTRS, new PacketWriter ().WriteId (id).WriteId (attr_type_id));
1546                         return ReadCattrs (r);
1547                 }
1548
1549                 public CattrInfo[] Type_GetFieldCustomAttributes (long id, long field_id, long attr_type_id, bool inherit) {
1550                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_FIELD_CATTRS, new PacketWriter ().WriteId (id).WriteId (field_id).WriteId (attr_type_id));
1551                         return ReadCattrs (r);
1552                 }
1553
1554                 public CattrInfo[] Type_GetPropertyCustomAttributes (long id, long field_id, long attr_type_id, bool inherit) {
1555                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_PROPERTY_CATTRS, new PacketWriter ().WriteId (id).WriteId (field_id).WriteId (attr_type_id));
1556                         return ReadCattrs (r);
1557                 }
1558
1559                 /*
1560                  * EVENTS
1561                  */
1562
1563                 public int EnableEvent (EventType etype, SuspendPolicy suspend_policy, List<Modifier> mods) {
1564                         var w = new PacketWriter ().WriteByte ((byte)etype).WriteByte ((byte)suspend_policy);
1565                         if (mods != null) {
1566                                 if (mods.Count > 255)
1567                                         throw new NotImplementedException ();
1568                                 w.WriteByte ((byte)mods.Count);
1569                                 foreach (Modifier mod in mods) {
1570                                         if (mod is CountModifier) {
1571                                                 w.WriteByte ((byte)ModifierKind.COUNT);
1572                                                 w.WriteInt ((mod as CountModifier).Count);
1573                                         } else if (mod is LocationModifier) {
1574                                                 w.WriteByte ((byte)ModifierKind.LOCATION_ONLY);
1575                                                 w.WriteId ((mod as LocationModifier).Method);
1576                                                 w.WriteLong ((mod as LocationModifier).Location);
1577                                         } else if (mod is StepModifier) {
1578                                                 w.WriteByte ((byte)ModifierKind.STEP);
1579                                                 w.WriteId ((mod as StepModifier).Thread);
1580                                                 w.WriteInt ((mod as StepModifier).Size);
1581                                                 w.WriteInt ((mod as StepModifier).Depth);
1582                                         } else if (mod is ThreadModifier) {
1583                                                 w.WriteByte ((byte)ModifierKind.THREAD_ONLY);
1584                                                 w.WriteId ((mod as ThreadModifier).Thread);
1585                                         } else if (mod is ExceptionModifier) {
1586                                                 var em = mod as ExceptionModifier;
1587                                                 w.WriteByte ((byte)ModifierKind.EXCEPTION_ONLY);
1588                                                 w.WriteId (em.Type);
1589                                                 if (Version.MajorVersion > 2 || Version.MinorVersion > 0) {
1590                                                         /* This is only supported in protocol version 2.1 */
1591                                                         w.WriteBool (em.Caught);
1592                                                         w.WriteBool (em.Uncaught);
1593                                                 } else if (!em.Caught || !em.Uncaught) {
1594                                                         throw new NotSupportedException ("This request is not supported by the protocol version implemented by the debuggee.");
1595                                                 }
1596                                         } else if (mod is AssemblyModifier) {
1597                                                 w.WriteByte ((byte)ModifierKind.ASSEMBLY_ONLY);
1598                                                 var amod = (mod as AssemblyModifier);
1599                                                 w.WriteInt (amod.Assemblies.Length);
1600                                                 foreach (var id in amod.Assemblies)
1601                                                         w.WriteId (id);
1602                                         } else {
1603                                                 throw new NotImplementedException ();
1604                                         }
1605                                 }
1606                         } else {
1607                                 w.WriteByte (0);
1608                         }
1609                         return SendReceive (CommandSet.EVENT_REQUEST, (int)CmdEventRequest.SET, w).ReadInt ();
1610                 }
1611
1612                 public void ClearEventRequest (EventType etype, int req_id) {
1613                         SendReceive (CommandSet.EVENT_REQUEST, (int)CmdEventRequest.CLEAR, new PacketWriter ().WriteByte ((byte)etype).WriteInt (req_id));
1614                 }
1615
1616                 public void ClearAllBreakpoints () {
1617                         SendReceive (CommandSet.EVENT_REQUEST, (int)CmdEventRequest.CLEAR_ALL_BREAKPOINTS, new PacketWriter ());
1618                 }
1619
1620                 /*
1621                  * STACK FRAME
1622                  */
1623                 public ValueImpl StackFrame_GetThis (long thread_id, long id) {
1624                         PacketReader r = SendReceive (CommandSet.STACK_FRAME, (int)CmdStackFrame.GET_THIS, new PacketWriter ().WriteId (thread_id).WriteId (id));
1625                         return r.ReadValue ();
1626                 }
1627
1628                 public ValueImpl[] StackFrame_GetValues (long thread_id, long id, int[] pos) {
1629                         /* pos < 0 -> argument at pos (-pos) - 1 */
1630                         /* pos >= 0 -> local at pos */
1631                         int len = pos.Length;
1632                         PacketReader r = SendReceive (CommandSet.STACK_FRAME, (int)CmdStackFrame.GET_VALUES, new PacketWriter ().WriteId (thread_id).WriteId (id).WriteInt (len).WriteInts (pos));
1633
1634                         ValueImpl[] res = new ValueImpl [len];
1635                         for (int i = 0; i < len; ++i)
1636                                 res [i] = r.ReadValue ();
1637                         return res;
1638                 }
1639
1640                 public void StackFrame_SetValues (long thread_id, long id, int[] pos, ValueImpl[] values) {
1641                         /* pos < 0 -> argument at pos (-pos) - 1 */
1642                         /* pos >= 0 -> local at pos */
1643                         int len = pos.Length;
1644                         SendReceive (CommandSet.STACK_FRAME, (int)CmdStackFrame.SET_VALUES, new PacketWriter ().WriteId (thread_id).WriteId (id).WriteInt (len).WriteInts (pos).WriteValues (values));
1645                 }
1646
1647                 /*
1648                  * ARRAYS
1649                  */
1650                 public int[] Array_GetLength (long id, out int rank, out int[] lower_bounds) {
1651                         var r = SendReceive (CommandSet.ARRAY_REF, (int)CmdArrayRef.GET_LENGTH, new PacketWriter ().WriteId (id));
1652                         rank = r.ReadInt ();
1653                         int[] res = new int [rank];
1654                         lower_bounds = new int [rank];
1655                         for (int i = 0; i < rank; ++i) {
1656                                 res [i] = r.ReadInt ();
1657                                 lower_bounds [i] = r.ReadInt ();
1658                         }
1659                         return res;
1660                 }
1661
1662                 public ValueImpl[] Array_GetValues (long id, int index, int len) {
1663                         var r = SendReceive (CommandSet.ARRAY_REF, (int)CmdArrayRef.GET_VALUES, new PacketWriter ().WriteId (id).WriteInt (index).WriteInt (len));
1664                         ValueImpl[] res = new ValueImpl [len];
1665                         for (int i = 0; i < len; ++i)
1666                                 res [i] = r.ReadValue ();
1667                         return res;
1668                 }
1669
1670                 public void Array_SetValues (long id, int index, ValueImpl[] values) {
1671                         SendReceive (CommandSet.ARRAY_REF, (int)CmdArrayRef.SET_VALUES, new PacketWriter ().WriteId (id).WriteInt (index).WriteInt (values.Length).WriteValues (values));
1672                 }
1673
1674                 /*
1675                  * STRINGS
1676                  */
1677                 public string String_GetValue (long id) {
1678                         return SendReceive (CommandSet.STRING_REF, (int)CmdStringRef.GET_VALUE, new PacketWriter ().WriteId (id)).ReadString ();
1679                 }
1680
1681                 /*
1682                  * OBJECTS
1683                  */
1684                 public long Object_GetType (long id) {
1685                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_TYPE, new PacketWriter ().WriteId (id)).ReadId ();
1686                 }
1687
1688                 public long Object_GetDomain (long id) {
1689                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_DOMAIN, new PacketWriter ().WriteId (id)).ReadId ();
1690                 }
1691
1692                 public ValueImpl[] Object_GetValues (long id, long[] fields) {
1693                         int len = fields.Length;
1694                         PacketReader r = SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_VALUES, new PacketWriter ().WriteId (id).WriteInt (len).WriteIds (fields));
1695
1696                         ValueImpl[] res = new ValueImpl [len];
1697                         for (int i = 0; i < len; ++i)
1698                                 res [i] = r.ReadValue ();
1699                         return res;
1700                 }
1701
1702                 public void Object_SetValues (long id, long[] fields, ValueImpl[] values) {
1703                         SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.SET_VALUES, new PacketWriter ().WriteId (id).WriteInt (fields.Length).WriteIds (fields).WriteValues (values));
1704                 }
1705
1706                 public bool Object_IsCollected (long id) {
1707                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.IS_COLLECTED, new PacketWriter ().WriteId (id)).ReadInt () == 1;
1708                 }
1709
1710                 public long Object_GetAddress (long id) {
1711                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_ADDRESS, new PacketWriter ().WriteId (id)).ReadLong ();
1712                 }
1713
1714         }
1715
1716         /* This is the interface exposed by the debugger towards the debugger agent */
1717         interface IEventHandler
1718         {
1719                 void VMStart (int req_id, long thread_id, string vm_uri);
1720
1721                 void VMDeath (int req_id, long thread_id, string vm_uri);
1722
1723                 void VMDisconnect (int req_id, long thread_id, string vm_uri);
1724
1725                 void ThreadStart (int req_id, long thread_id, long id);
1726
1727                 void ThreadDeath (int req_id, long thread_id, long id);
1728
1729                 void AssemblyLoad (int req_id, long thread_id, long id);
1730
1731                 void AssemblyUnload (int req_id, long thread_id, long id);
1732
1733                 void TypeLoad (int req_id, long thread_id, long id);
1734
1735                 void MethodEntry (int req_id, long thread_id, long id);
1736
1737                 void MethodExit (int req_id, long thread_id, long id);
1738
1739                 void Breakpoint (int req_id, long thread_id, long method_id, long loc);
1740
1741                 void Step (int req_id, long thread_id, long method_id, long loc);
1742
1743                 void Exception (int req_id, long thread_id, long exc_id, long loc);
1744
1745                 void AppDomainCreate (int req_id, long thread_id, long id);
1746
1747                 void AppDomainUnload (int req_id, long thread_id, long id);
1748         }
1749 }