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 System.Diagnostics;
   9 using Mono.Cecil.Metadata;
  10
  11 namespace Mono.Debugger.Soft
  12 {
  13         public class VersionInfo {
  14                 public string VMVersion {
  15                         get; set;
  16                 }
  17
  18                 public int MajorVersion {
  19                         get; set;
  20                 }
  21
  22                 public int MinorVersion {
  23                         get; set;
  24                 }
  25
  26                 /*
  27                  * Check that this version is at least major:minor
  28                  */
  29                 public bool AtLeast (int major, int minor) {
  30                         if ((MajorVersion > major) || ((MajorVersion == major && MinorVersion >= minor)))
  31                                 return true;
  32                         else
  33                                 return false;
  34                 }
  35         }
  36
  37         struct SourceInfo {
  38                 public string source_file;
  39                 public byte[] guid, hash;
  40         }
  41
  42         class DebugInfo {
  43                 public int max_il_offset;
  44                 public int[] il_offsets;
  45                 public int[] line_numbers;
  46                 public int[] column_numbers;
  47                 public SourceInfo[] source_files;
  48         }
  49
  50         struct FrameInfo {
  51                 public long id;
  52                 public long method;
  53                 public int il_offset;
  54                 public StackFrameFlags flags;
  55         }
  56
  57         class TypeInfo {
  58                 public string ns, name, full_name;
  59                 public long assembly, module, base_type, element_type;
  60                 public int token, rank, attributes;
  61                 public bool is_byref, is_pointer, is_primitive, is_valuetype, is_enum;
  62                 public bool is_gtd, is_generic_type;
  63                 public long[] nested;
  64                 public long gtd;
  65                 public long[] type_args;
  66         }
  67
  68         struct IfaceMapInfo {
  69                 public long iface_id;
  70                 public long[] iface_methods;
  71                 public long[] target_methods;
  72         }
  73
  74         class MethodInfo {
  75                 public int attributes, iattributes, token;
  76                 public bool is_gmd, is_generic_method;
  77                 public long gmd;
  78                 public long[] type_args;
  79         }
  80
  81         class MethodBodyInfo {
  82                 public byte[] il;
  83                 public ExceptionClauseInfo[] clauses;
  84         }
  85
  86         struct ExceptionClauseInfo {
  87                 public ExceptionClauseFlags flags;
  88                 public int try_offset;
  89                 public int try_length;
  90                 public int handler_offset;
  91                 public int handler_length;
  92                 public int filter_offset;
  93                 public long catch_type_id;
  94         }
  95
  96         enum ExceptionClauseFlags {
  97                 None = 0x0,
  98                 Filter = 0x1,
  99                 Finally = 0x2,
 100                 Fault = 0x4,
 101         }
 102
 103         struct ParamInfo {
 104                 public int call_conv;
 105                 public int param_count;
 106                 public int generic_param_count;
 107                 public long ret_type;
 108                 public long[] param_types;
 109                 public string[] param_names;
 110         }
 111
 112         struct LocalsInfo {
 113                 public long[] types;
 114                 public string[] names;
 115                 public int[] live_range_start;
 116                 public int[] live_range_end;
 117         }
 118
 119         struct PropInfo {
 120                 public long id;
 121                 public string name;
 122                 public long get_method, set_method;
 123                 public int attrs;
 124         }
 125
 126         class CattrNamedArgInfo {
 127                 public bool is_property;
 128                 public long id;
 129                 public ValueImpl value;
 130         }
 131
 132         class CattrInfo {
 133                 public long ctor_id;
 134                 public ValueImpl[] ctor_args;
 135                 public CattrNamedArgInfo[] named_args;
 136         }
 137
 138         class ThreadInfo {
 139                 public bool is_thread_pool;
 140         }
 141
 142         struct ObjectRefInfo {
 143                 public long type_id;
 144                 public long domain_id;
 145         }
 146
 147         enum ValueTypeId {
 148                 VALUE_TYPE_ID_NULL = 0xf0,
 149                 VALUE_TYPE_ID_TYPE = 0xf1
 150         }
 151
 152         enum InvokeFlags {
 153                 NONE = 0x0,
 154                 DISABLE_BREAKPOINTS = 0x1,
 155                 SINGLE_THREADED = 0x2
 156         }
 157
 158         enum ElementType {
 159                 End              = 0x00,
 160                 Void            = 0x01,
 161                 Boolean  = 0x02,
 162                 Char            = 0x03,
 163                 I1                = 0x04,
 164                 U1                = 0x05,
 165                 I2                = 0x06,
 166                 U2                = 0x07,
 167                 I4                = 0x08,
 168                 U4                = 0x09,
 169                 I8                = 0x0a,
 170                 U8                = 0x0b,
 171                 R4                = 0x0c,
 172                 R8                = 0x0d,
 173                 String    = 0x0e,
 174                 Ptr              = 0x0f,
 175                 ByRef      = 0x10,
 176                 ValueType   = 0x11,
 177                 Class      = 0x12,
 178                 Var        = 0x13,
 179                 Array      = 0x14,
 180                 GenericInst = 0x15,
 181                 TypedByRef  = 0x16,
 182                 I                  = 0x18,
 183                 U                  = 0x19,
 184                 FnPtr      = 0x1b,
 185                 Object    = 0x1c,
 186                 SzArray  = 0x1d,
 187                 MVar       = 0x1e,
 188                 CModReqD        = 0x1f,
 189                 CModOpt  = 0x20,
 190                 Internal        = 0x21,
 191                 Modifier        = 0x40,
 192                 Sentinel        = 0x41,
 193                 Pinned    = 0x45,
 194
 195                 Type            = 0x50,
 196                 Boxed      = 0x51,
 197                 Enum            = 0x55
 198         }
 199
 200         class ValueImpl {
 201                 public ElementType Type; /* or one of the VALUE_TYPE_ID constants */
 202                 public long Objid;
 203                 public object Value;
 204                 public long Klass; // For ElementType.ValueType
 205                 public ValueImpl[] Fields; // for ElementType.ValueType
 206                 public bool IsEnum; // For ElementType.ValueType
 207                 public long Id; /* For VALUE_TYPE_ID_TYPE */
 208         }
 209
 210         class ModuleInfo {
 211                 public string Name, ScopeName, FQName, Guid;
 212                 public long Assembly;
 213         }
 214
 215         enum TokenType {
 216                 STRING = 0,
 217                 TYPE = 1,
 218                 FIELD = 2,
 219                 METHOD = 3,
 220                 UNKNOWN = 4
 221         }
 222
 223         enum StackFrameFlags {
 224                 NONE = 0,
 225                 DEBUGGER_INVOKE = 1,
 226                 NATIVE_TRANSITION = 2
 227         }
 228
 229         class ResolvedToken {
 230                 public TokenType Type;
 231                 public string Str;
 232                 public long Id;
 233         }
 234
 235         class Modifier {
 236         }
 237
 238         class CountModifier : Modifier {
 239                 public int Count {
 240                         get; set;
 241                 }
 242         }
 243
 244         class LocationModifier : Modifier {
 245                 public long Method {
 246                         get; set;
 247                 }
 248
 249                 public long Location {
 250                         get; set;
 251                 }
 252         }
 253
 254         class StepModifier : Modifier {
 255                 public long Thread {
 256                         get; set;
 257                 }
 258
 259                 public int Depth {
 260                         get; set;
 261                 }
 262
 263                 public int Size {
 264                         get; set;
 265                 }
 266
 267                 public int Filter {
 268                         get; set;
 269                 }
 270         }
 271
 272         class ThreadModifier : Modifier {
 273                 public long Thread {
 274                         get; set;
 275                 }
 276         }
 277
 278         class ExceptionModifier : Modifier {
 279                 public long Type {
 280                         get; set;
 281                 }
 282                 public bool Caught {
 283                         get; set;
 284                 }
 285                 public bool Uncaught {
 286                         get; set;
 287                 }
 288         }
 289
 290         class AssemblyModifier : Modifier {
 291                 public long[] Assemblies {
 292                         get; set;
 293                 }
 294         }
 295
 296         class SourceFileModifier : Modifier {
 297                 public string[] SourceFiles {
 298                         get; set;
 299                 }
 300         }
 301
 302         class TypeNameModifier : Modifier {
 303                 public string[] TypeNames {
 304                         get; set;
 305                 }
 306         }
 307
 308         class EventInfo {
 309                 public EventType EventType {
 310                         get; set;
 311                 }
 312
 313                 public int ReqId {
 314                         get; set;
 315                 }
 316
 317                 public SuspendPolicy SuspendPolicy {
 318                         get; set;
 319                 }
 320
 321                 public long ThreadId {
 322                         get; set;
 323                 }
 324
 325                 public long Id {
 326                         get; set;
 327                 }
 328
 329                 public long Location {
 330                         get; set;
 331                 }
 332
 333                 public int Level {
 334                         get; set;
 335                 }
 336
 337                 public string Category {
 338                         get; set;
 339                 }
 340
 341                 public string Message {
 342                         get; set;
 343                 }
 344
 345                 public EventInfo (EventType type, int req_id) {
 346                         EventType = type;
 347                         ReqId = req_id;
 348                 }
 349         }
 350
 351         public enum ErrorCode {
 352                 NONE = 0,
 353                 INVALID_OBJECT = 20,
 354                 INVALID_FIELDID = 25,
 355                 INVALID_FRAMEID = 30,
 356                 NOT_IMPLEMENTED = 100,
 357                 NOT_SUSPENDED = 101,
 358                 INVALID_ARGUMENT = 102,
 359                 ERR_UNLOADED = 103,
 360                 ERR_NO_INVOCATION = 104,
 361                 ABSENT_INFORMATION = 105,
 362                 NO_SEQ_POINT_AT_IL_OFFSET = 106
 363         }
 364
 365         public class ErrorHandlerEventArgs : EventArgs {
 366
 367                 public ErrorCode ErrorCode {
 368                         get; set;
 369                 }
 370         }
 371
 372         /*
 373          * Represents the connection to the debuggee
 374          */
 375         public abstract class Connection
 376         {
 377                 /*
 378                  * The protocol and the packet format is based on JDWP, the differences
 379                  * are in the set of supported events, and the commands.
 380                  */
 381                 internal const string HANDSHAKE_STRING = "DWP-Handshake";
 382
 383                 internal const int HEADER_LENGTH = 11;
 384
 385                 static readonly bool EnableConnectionLogging = !String.IsNullOrEmpty (Environment.GetEnvironmentVariable ("MONO_SDB_LOG"));
 386                 static int ConnectionId;
 387                 readonly StreamWriter LoggingStream = EnableConnectionLogging ?
 388                         new StreamWriter (string.Format ("/tmp/sdb_conn_log_{0}", ConnectionId++), false) : null;
 389
 390                 /*
 391                  * Th version of the wire-protocol implemented by the library. The library
 392                  * and the debuggee can communicate if they implement the same major version.
 393                  * If they implement a different minor version, they can communicate, but some
 394                  * features might not be available. This allows older clients to communicate
 395                  * with newer runtimes, and vice versa.
 396                  */
 397                 internal const int MAJOR_VERSION = 2;
 398                 internal const int MINOR_VERSION = 23;
 399
 400                 enum WPSuspendPolicy {
 401                         NONE = 0,
 402                         EVENT_THREAD = 1,
 403                         ALL = 2
 404                 }
 405
 406                 enum CommandSet {
 407                         VM = 1,
 408                         OBJECT_REF = 9,
 409                         STRING_REF = 10,
 410                         THREAD = 11,
 411                         ARRAY_REF = 13,
 412                         EVENT_REQUEST = 15,
 413                         STACK_FRAME = 16,
 414                         APPDOMAIN = 20,
 415                         ASSEMBLY = 21,
 416                         METHOD = 22,
 417                         TYPE = 23,
 418                         MODULE = 24,
 419                         EVENT = 64
 420                 }
 421
 422                 enum EventKind {
 423                         VM_START = 0,
 424                         VM_DEATH = 1,
 425                         THREAD_START = 2,
 426                         THREAD_DEATH = 3,
 427                         APPDOMAIN_CREATE = 4, // Not in JDI
 428                         APPDOMAIN_UNLOAD = 5, // Not in JDI
 429                         METHOD_ENTRY = 6,
 430                         METHOD_EXIT = 7,
 431                         ASSEMBLY_LOAD = 8,
 432                         ASSEMBLY_UNLOAD = 9,
 433                         BREAKPOINT = 10,
 434                         STEP = 11,
 435                         TYPE_LOAD = 12,
 436                         EXCEPTION = 13,
 437                         KEEPALIVE = 14,
 438                         USER_BREAK = 15,
 439                         USER_LOG = 16
 440                 }
 441
 442                 enum ModifierKind {
 443                         COUNT = 1,
 444                         THREAD_ONLY = 3,
 445                         LOCATION_ONLY = 7,
 446                         EXCEPTION_ONLY = 8,
 447                         STEP = 10,
 448                         ASSEMBLY_ONLY = 11,
 449                         SOURCE_FILE_ONLY = 12,
 450                         TYPE_NAME_ONLY = 13
 451                 }
 452
 453                 enum CmdVM {
 454                         VERSION = 1,
 455                         ALL_THREADS = 2,
 456                         SUSPEND = 3,
 457                         RESUME = 4,
 458                         EXIT = 5,
 459                         DISPOSE = 6,
 460                         INVOKE_METHOD = 7,
 461                         SET_PROTOCOL_VERSION = 8,
 462                         ABORT_INVOKE = 9,
 463                         SET_KEEPALIVE = 10,
 464                         GET_TYPES_FOR_SOURCE_FILE = 11,
 465                         GET_TYPES = 12,
 466                         INVOKE_METHODS = 13
 467                 }
 468
 469                 enum CmdEvent {
 470                         COMPOSITE = 100
 471                 }
 472
 473                 enum CmdThread {
 474                         GET_FRAME_INFO = 1,
 475                         GET_NAME = 2,
 476                         GET_STATE = 3,
 477                         GET_INFO = 4,
 478                         /* FIXME: Merge into GET_INFO when the major protocol version is increased */
 479                         GET_ID = 5,
 480                         /* Ditto */
 481                         GET_TID = 6
 482                 }
 483
 484                 enum CmdEventRequest {
 485                         SET = 1,
 486                         CLEAR = 2,
 487                         CLEAR_ALL_BREAKPOINTS = 3
 488                 }
 489
 490                 enum CmdAppDomain {
 491                         GET_ROOT_DOMAIN = 1,
 492                         GET_FRIENDLY_NAME = 2,
 493                         GET_ASSEMBLIES = 3,
 494                         GET_ENTRY_ASSEMBLY = 4,
 495                         CREATE_STRING = 5,
 496                         GET_CORLIB = 6,
 497                         CREATE_BOXED_VALUE = 7
 498                 }
 499
 500                 enum CmdAssembly {
 501                         GET_LOCATION = 1,
 502                         GET_ENTRY_POINT = 2,
 503                         GET_MANIFEST_MODULE = 3,
 504                         GET_OBJECT = 4,
 505                         GET_TYPE = 5,
 506                         GET_NAME = 6
 507                 }
 508
 509                 enum CmdModule {
 510                         GET_INFO = 1,
 511                 }
 512
 513                 enum CmdMethod {
 514                         GET_NAME = 1,
 515                         GET_DECLARING_TYPE = 2,
 516                         GET_DEBUG_INFO = 3,
 517                         GET_PARAM_INFO = 4,
 518                         GET_LOCALS_INFO = 5,
 519                         GET_INFO = 6,
 520                         GET_BODY = 7,
 521                         RESOLVE_TOKEN = 8,
 522                         GET_CATTRS = 9
 523                 }
 524
 525                 enum CmdType {
 526                         GET_INFO = 1,
 527                         GET_METHODS = 2,
 528                         GET_FIELDS = 3,
 529                         GET_VALUES = 4,
 530                         GET_OBJECT = 5,
 531                         GET_SOURCE_FILES = 6,
 532                         SET_VALUES = 7,
 533                         IS_ASSIGNABLE_FROM = 8,
 534                         GET_PROPERTIES = 9,
 535                         GET_CATTRS = 10,
 536                         GET_FIELD_CATTRS = 11,
 537                         GET_PROPERTY_CATTRS = 12,
 538                         /* FIXME: Merge into GET_SOURCE_FILES when the major protocol version is increased */
 539                         GET_SOURCE_FILES_2 = 13,
 540                         /* FIXME: Merge into GET_VALUES when the major protocol version is increased */
 541                         GET_VALUES_2 = 14,
 542                         CMD_TYPE_GET_METHODS_BY_NAME_FLAGS = 15,
 543                         GET_INTERFACES = 16,
 544                         GET_INTERFACE_MAP = 17,
 545                         IS_INITIALIZED = 18
 546                 }
 547
 548                 enum BindingFlagsExtensions {
 549                         BINDING_FLAGS_IGNORE_CASE = 0x70000000,
 550                 }
 551
 552                 enum CmdStackFrame {
 553                         GET_VALUES = 1,
 554                         GET_THIS = 2,
 555                         SET_VALUES = 3
 556                 }
 557
 558                 enum CmdArrayRef {
 559                         GET_LENGTH = 1,
 560                         GET_VALUES = 2,
 561                         SET_VALUES = 3
 562                 }
 563
 564                 enum CmdStringRef {
 565                         GET_VALUE = 1,
 566                         GET_LENGTH = 2,
 567                         GET_CHARS = 3
 568                 }
 569
 570                 enum CmdObjectRef {
 571                         GET_TYPE = 1,
 572                         GET_VALUES = 2,
 573                         IS_COLLECTED = 3,
 574                         GET_ADDRESS = 4,
 575                         GET_DOMAIN = 5,
 576                         SET_VALUES = 6,
 577                         GET_INFO = 7,
 578                 }
 579
 580                 class Header {
 581                         public int id;
 582                         public int command_set;
 583                         public int command;
 584                         public int flags;
 585                 }
 586
 587                 internal static int GetPacketLength (byte[] header) {
 588                         int offset = 0;
 589                         return decode_int (header, ref offset);
 590                 }
 591
 592                 internal static bool IsReplyPacket (byte[] packet) {
 593                         int offset = 8;
 594                         return decode_byte (packet, ref offset) == 0x80;
 595                 }
 596
 597                 internal static int GetPacketId (byte[] packet) {
 598                         int offset = 4;
 599                         return decode_int (packet, ref offset);
 600                 }
 601
 602                 static int decode_byte (byte[] packet, ref int offset) {
 603                         return packet [offset++];
 604                 }
 605
 606                 static int decode_short (byte[] packet, ref int offset) {
 607                         int res = ((int)packet [offset] << 8) | (int)packet [offset + 1];
 608                         offset += 2;
 609                         return res;
 610                 }
 611
 612                 static int decode_int (byte[] packet, ref int offset) {
 613                         int res = ((int)packet [offset] << 24) | ((int)packet [offset + 1] << 16) | ((int)packet [offset + 2] << 8) | (int)packet [offset + 3];
 614                         offset += 4;
 615                         return res;
 616                 }
 617
 618                 static long decode_id (byte[] packet, ref int offset) {
 619                         return decode_int (packet, ref offset);
 620                 }
 621
 622                 static long decode_long (byte[] packet, ref int offset) {
 623                         uint high = (uint)decode_int (packet, ref offset);
 624                         uint low = (uint)decode_int (packet, ref offset);
 625
 626                         return (long)(((ulong)high << 32) | (ulong)low);
 627                 }
 628
 629                 internal static SuspendPolicy decode_suspend_policy (int suspend_policy) {
 630                         switch ((WPSuspendPolicy)suspend_policy) {
 631                         case WPSuspendPolicy.NONE:
 632                                 return SuspendPolicy.None;
 633                         case WPSuspendPolicy.EVENT_THREAD:
 634                                 return SuspendPolicy.EventThread;
 635                         case WPSuspendPolicy.ALL:
 636                                 return SuspendPolicy.All;
 637                         default:
 638                                 throw new NotImplementedException ();
 639                         }
 640                 }
 641
 642                 static Header decode_command_header (byte[] packet) {
 643                         int offset = 0;
 644                         Header res = new Header ();
 645
 646                         decode_int (packet, ref offset);
 647                         res.id = decode_int (packet, ref offset);
 648                         res.flags = decode_byte (packet, ref offset);
 649                         res.command_set = decode_byte (packet, ref offset);
 650                         res.command = decode_byte (packet, ref offset);
 651
 652                         return res;
 653                 }
 654
 655                 static void encode_byte (byte[] buf, int b, ref int offset) {
 656                         buf [offset] = (byte)b;
 657                         offset ++;
 658                 }
 659
 660                 static void encode_int (byte[] buf, int i, ref int offset) {
 661                         buf [offset] = (byte)((i >> 24) & 0xff);
 662                         buf [offset + 1] = (byte)((i >> 16) & 0xff);
 663                         buf [offset + 2] = (byte)((i >> 8) & 0xff);
 664                         buf [offset + 3] = (byte)((i >> 0) & 0xff);
 665                         offset += 4;
 666                 }
 667
 668                 static void encode_id (byte[] buf, long id, ref int offset) {
 669                         encode_int (buf, (int)id, ref offset);
 670                 }
 671
 672                 static void encode_long (byte[] buf, long l, ref int offset) {
 673                         encode_int (buf, (int)((l >> 32) & 0xffffffff), ref offset);
 674                         encode_int (buf, (int)(l & 0xffffffff), ref offset);
 675                 }
 676
 677                 internal static byte[] EncodePacket (int id, int commandSet, int command, byte[] data, int dataLen) {
 678                         byte[] buf = new byte [dataLen + 11];
 679                         int offset = 0;
 680
 681                         encode_int (buf, buf.Length, ref offset);
 682                         encode_int (buf, id, ref offset);
 683                         encode_byte (buf, 0, ref offset);
 684                         encode_byte (buf, commandSet, ref offset);
 685                         encode_byte (buf, command, ref offset);
 686
 687                         for (int i = 0; i < dataLen; ++i)
 688                                 buf [offset + i] = data [i];
 689
 690                         return buf;
 691                 }
 692
 693                 class PacketReader {
 694                         byte[] packet;
 695                         int offset;
 696
 697                         public PacketReader (byte[] packet) {
 698                                 this.packet = packet;
 699
 700                                 // For event packets
 701                                 Header header = decode_command_header (packet);
 702                                 CommandSet = (CommandSet)header.command_set;
 703                                 Command = header.command;
 704
 705                                 // For reply packets
 706                                 offset = 0;
 707                                 ReadInt (); // length
 708                                 ReadInt (); // id
 709                                 ReadByte (); // flags
 710                                 ErrorCode = ReadShort ();
 711                         }
 712
 713                         public CommandSet CommandSet {
 714                                 get; set;
 715                         }
 716
 717                         public int Command {
 718                                 get; set;
 719                         }
 720
 721                         public int ErrorCode {
 722                                 get; set;
 723                         }
 724
 725                         public int Offset {
 726                                 get {
 727                                         return offset;
 728                                 }
 729                         }
 730
 731                         public int ReadByte () {
 732                                 return decode_byte (packet, ref offset);
 733                         }
 734
 735                         public int ReadShort () {
 736                                 return decode_short (packet, ref offset);
 737                         }
 738
 739                         public int ReadInt () {
 740                                 return decode_int (packet, ref offset);
 741                         }
 742
 743                         public long ReadId () {
 744                                 return decode_id (packet, ref offset);
 745                         }
 746
 747                         public long ReadLong () {
 748                                 return decode_long (packet, ref offset);
 749                         }
 750
 751                         public float ReadFloat () {
 752                                 float f = DataConverter.FloatFromBE (packet, offset);
 753                                 offset += 4;
 754                                 return f;
 755                         }
 756
 757                         public double ReadDouble () {
 758                                 double d = DataConverter.DoubleFromBE (packet, offset);
 759                                 offset += 8;
 760                                 return d;
 761                         }
 762
 763                         public string ReadString () {
 764                                 int len = decode_int (packet, ref offset);
 765                                 string res = new String (Encoding.UTF8.GetChars (packet, offset, len));
 766                                 offset += len;
 767                                 return res;
 768                         }
 769
 770                         public ValueImpl ReadValue () {
 771                                 ElementType etype = (ElementType)ReadByte ();
 772
 773                                 switch (etype) {
 774                                 case ElementType.Void:
 775                                         return new ValueImpl { Type = etype };
 776                                 case ElementType.I1:
 777                                         return new ValueImpl { Type = etype, Value = (sbyte)ReadInt () };
 778                                 case ElementType.U1:
 779                                         return new ValueImpl { Type = etype, Value = (byte)ReadInt () };
 780                                 case ElementType.Boolean:
 781                                         return new ValueImpl { Type = etype, Value = ReadInt () != 0 };
 782                                 case ElementType.I2:
 783                                         return new ValueImpl { Type = etype, Value = (short)ReadInt () };
 784                                 case ElementType.U2:
 785                                         return new ValueImpl { Type = etype, Value = (ushort)ReadInt () };
 786                                 case ElementType.Char:
 787                                         return new ValueImpl { Type = etype, Value = (char)ReadInt () };
 788                                 case ElementType.I4:
 789                                         return new ValueImpl { Type = etype, Value = ReadInt () };
 790                                 case ElementType.U4:
 791                                         return new ValueImpl { Type = etype, Value = (uint)ReadInt () };
 792                                 case ElementType.I8:
 793                                         return new ValueImpl { Type = etype, Value = ReadLong () };
 794                                 case ElementType.U8:
 795                                         return new ValueImpl { Type = etype, Value = (ulong)ReadLong () };
 796                                 case ElementType.R4:
 797                                         return new ValueImpl { Type = etype, Value = ReadFloat () };
 798                                 case ElementType.R8:
 799                                         return new ValueImpl { Type = etype, Value = ReadDouble () };
 800                                 case ElementType.I:
 801                                 case ElementType.U:
 802                                 case ElementType.Ptr:
 803                                         // FIXME: The client and the debuggee might have different word sizes
 804                                         return new ValueImpl { Type = etype, Value = ReadLong () };
 805                                 case ElementType.String:
 806                                 case ElementType.SzArray:
 807                                 case ElementType.Class:
 808                                 case ElementType.Array:
 809                                 case ElementType.Object:
 810                                         long objid = ReadId ();
 811                                         return new ValueImpl () { Type = etype, Objid = objid };
 812                                 case ElementType.ValueType:
 813                                         bool is_enum = ReadByte () == 1;
 814                                         long klass = ReadId ();
 815                                         long nfields = ReadInt ();
 816                                         ValueImpl[] fields = new ValueImpl [nfields];
 817                                         for (int i = 0; i < nfields; ++i)
 818                                                 fields [i] = ReadValue ();
 819                                         return new ValueImpl () { Type = etype, Klass = klass, Fields = fields, IsEnum = is_enum };
 820                                 case (ElementType)ValueTypeId.VALUE_TYPE_ID_NULL:
 821                                         return new ValueImpl { Type = etype };
 822                                 case (ElementType)ValueTypeId.VALUE_TYPE_ID_TYPE:
 823                                         return new ValueImpl () { Type = etype, Id = ReadId () };
 824                                 default:
 825                                         throw new NotImplementedException ("Unable to handle type " + etype);
 826                                 }
 827                         }
 828
 829                         public long[] ReadIds (int n) {
 830                                 long[] res = new long [n];
 831                                 for (int i = 0; i < n; ++i)
 832                                         res [i] = ReadId ();
 833                                 return res;
 834                         }
 835                 }
 836
 837                 class PacketWriter {
 838
 839                         byte[] data;
 840                         int offset;
 841
 842                         public PacketWriter () {
 843                                 data = new byte [1024];
 844                                 offset = 0;
 845                         }
 846
 847                         void MakeRoom (int size) {
 848                                 if (offset + size >= data.Length) {
 849                                         int new_len = data.Length * 2;
 850                                         while (new_len < offset + size) {
 851                                                 new_len *= 2;
 852                                         }
 853                                         byte[] new_data = new byte [new_len];
 854                                         Array.Copy (data, new_data, data.Length);
 855                                         data = new_data;
 856                                 }
 857                         }
 858
 859                         public PacketWriter WriteByte (byte val) {
 860                                 MakeRoom (1);
 861                                 encode_byte (data, val, ref offset);
 862                                 return this;
 863                         }
 864
 865                         public PacketWriter WriteInt (int val) {
 866                                 MakeRoom (4);
 867                                 encode_int (data, val, ref offset);
 868                                 return this;
 869                         }
 870
 871                         public PacketWriter WriteId (long id) {
 872                                 MakeRoom (8);
 873                                 encode_id (data, id, ref offset);
 874                                 return this;
 875                         }
 876
 877                         public PacketWriter WriteLong (long val) {
 878                                 MakeRoom (8);
 879                                 encode_long (data, val, ref offset);
 880                                 return this;
 881                         }
 882
 883                         public PacketWriter WriteFloat (float f) {
 884                                 MakeRoom (8);
 885                                 byte[] b = DataConverter.GetBytesBE (f);
 886                                 for (int i = 0; i < 4; ++i)
 887                                         data [offset + i] = b [i];
 888                                 offset += 4;
 889                                 return this;
 890                         }
 891
 892                         public PacketWriter WriteDouble (double d) {
 893                                 MakeRoom (8);
 894                                 byte[] b = DataConverter.GetBytesBE (d);
 895                                 for (int i = 0; i < 8; ++i)
 896                                         data [offset + i] = b [i];
 897                                 offset += 8;
 898                                 return this;
 899                         }
 900
 901                         public PacketWriter WriteInts (int[] ids) {
 902                                 for (int i = 0; i < ids.Length; ++i)
 903                                         WriteInt (ids [i]);
 904                                 return this;
 905                         }
 906
 907                         public PacketWriter WriteIds (long[] ids) {
 908                                 for (int i = 0; i < ids.Length; ++i)
 909                                         WriteId (ids [i]);
 910                                 return this;
 911                         }
 912
 913                         public PacketWriter WriteString (string s) {
 914                                 if (s == null)
 915                                         return WriteInt (-1);
 916
 917                                 byte[] b = Encoding.UTF8.GetBytes (s);
 918                                 MakeRoom (4);
 919                                 encode_int (data, b.Length, ref offset);
 920                                 MakeRoom (b.Length);
 921                                 Buffer.BlockCopy (b, 0, data, offset, b.Length);
 922                                 offset += b.Length;
 923                                 return this;
 924                         }
 925
 926                         public PacketWriter WriteBool (bool val) {
 927                                 WriteByte (val ? (byte)1 : (byte)0);
 928                                 return this;
 929                         }
 930
 931                         public PacketWriter WriteValue (ValueImpl v) {
 932                                 ElementType t;
 933
 934                                 if (v.Value != null)
 935                                         t = TypeCodeToElementType (Type.GetTypeCode (v.Value.GetType ()));
 936                                 else
 937                                         t = v.Type;
 938                                 WriteByte ((byte)t);
 939                                 switch (t) {
 940                                 case ElementType.Boolean:
 941                                         WriteInt ((bool)v.Value ? 1 : 0);
 942                                         break;
 943                                 case ElementType.Char:
 944                                         WriteInt ((int)(char)v.Value);
 945                                         break;
 946                                 case ElementType.I1:
 947                                         WriteInt ((int)(sbyte)v.Value);
 948                                         break;
 949                                 case ElementType.U1:
 950                                         WriteInt ((int)(byte)v.Value);
 951                                         break;
 952                                 case ElementType.I2:
 953                                         WriteInt ((int)(short)v.Value);
 954                                         break;
 955                                 case ElementType.U2:
 956                                         WriteInt ((int)(ushort)v.Value);
 957                                         break;
 958                                 case ElementType.I4:
 959                                         WriteInt ((int)(int)v.Value);
 960                                         break;
 961                                 case ElementType.U4:
 962                                         WriteInt ((int)(uint)v.Value);
 963                                         break;
 964                                 case ElementType.I8:
 965                                         WriteLong ((long)(long)v.Value);
 966                                         break;
 967                                 case ElementType.U8:
 968                                         WriteLong ((long)(ulong)v.Value);
 969                                         break;
 970                                 case ElementType.R4:
 971                                         WriteFloat ((float)v.Value);
 972                                         break;
 973                                 case ElementType.R8:
 974                                         WriteDouble ((double)v.Value);
 975                                         break;
 976                                 case ElementType.String:
 977                                 case ElementType.SzArray:
 978                                 case ElementType.Class:
 979                                 case ElementType.Array:
 980                                 case ElementType.Object:
 981                                         WriteId (v.Objid);
 982                                         break;
 983                                 case ElementType.ValueType:
 984                                         // FIXME:
 985                                         if (v.IsEnum)
 986                                                 throw new NotImplementedException ();
 987                                         WriteByte (0);
 988                                         WriteId (v.Klass);
 989                                         WriteInt (v.Fields.Length);
 990                                         for (int i = 0; i < v.Fields.Length; ++i)
 991                                                 WriteValue (v.Fields [i]);
 992                                         break;
 993                                 case (ElementType)ValueTypeId.VALUE_TYPE_ID_NULL:
 994                                         break;
 995                                 default:
 996                                         throw new NotImplementedException ();
 997                                 }
 998
 999                                 return this;
1000                         }
1001
1002                         public PacketWriter WriteValues (ValueImpl[] values) {
1003                                 for (int i = 0; i < values.Length; ++i)
1004                                         WriteValue (values [i]);
1005                                 return this;
1006                         }
1007
1008                         public byte[] Data {
1009                                 get {
1010                                         return data;
1011                                 }
1012                         }
1013
1014                         public int Offset {
1015                                 get {
1016                                         return offset;
1017                                 }
1018                         }
1019                 }
1020
1021                 delegate void ReplyCallback (int packet_id, byte[] packet);
1022
1023                 bool closed;
1024                 Thread receiver_thread;
1025                 Dictionary<int, byte[]> reply_packets;
1026                 Dictionary<int, ReplyCallback> reply_cbs;
1027                 Dictionary<int, int> reply_cb_counts;
1028                 object reply_packets_monitor;
1029
1030                 internal event EventHandler<ErrorHandlerEventArgs> ErrorHandler;
1031
1032                 protected Connection () {
1033                         closed = false;
1034                         reply_packets = new Dictionary<int, byte[]> ();
1035                         reply_cbs = new Dictionary<int, ReplyCallback> ();
1036                         reply_cb_counts = new Dictionary<int, int> ();
1037                         reply_packets_monitor = new Object ();
1038                 }
1039
1040                 protected abstract int TransportReceive (byte[] buf, int buf_offset, int len);
1041                 protected abstract int TransportSend (byte[] buf, int buf_offset, int len);
1042                 protected abstract void TransportSetTimeouts (int send_timeout, int receive_timeout);
1043                 protected abstract void TransportClose ();
1044
1045                 internal VersionInfo Version;
1046
1047                 int Receive (byte[] buf, int buf_offset, int len) {
1048                         int offset = 0;
1049
1050                         while (offset < len) {
1051                                 int n = TransportReceive (buf, buf_offset + offset, len - offset);
1052
1053                                 if (n == 0)
1054                                         return offset;
1055                                 offset += n;
1056                         }
1057
1058                         return offset;
1059                 }
1060
1061                 // Do the wire protocol handshake
1062                 internal void Connect () {
1063                         byte[] buf = new byte [HANDSHAKE_STRING.Length];
1064                         char[] cbuf = new char [buf.Length];
1065
1066                         // FIXME: Add a timeout
1067                         int n = Receive (buf, 0, buf.Length);
1068                         if (n == 0)
1069                                 throw new IOException ("DWP Handshake failed.");
1070                         for (int i = 0; i < buf.Length; ++i)
1071                                 cbuf [i] = (char)buf [i];
1072
1073                         if (new String (cbuf) != HANDSHAKE_STRING)
1074                                 throw new IOException ("DWP Handshake failed.");
1075
1076                         TransportSend (buf, 0, buf.Length);
1077
1078                         receiver_thread = new Thread (new ThreadStart (receiver_thread_main));
1079                         receiver_thread.Name = "SDB Receiver";
1080                         receiver_thread.IsBackground = true;
1081                         receiver_thread.Start ();
1082
1083                         Version = VM_GetVersion ();
1084
1085                         //
1086                         // Tell the debuggee our protocol version, so newer debuggees can work
1087                         // with older clients
1088                         //
1089
1090                         //
1091                         // Older debuggees might not support this request
1092                         EventHandler<ErrorHandlerEventArgs> OrigErrorHandler = ErrorHandler;
1093                         ErrorHandler = null;
1094                         ErrorHandler += delegate (object sender, ErrorHandlerEventArgs args) {
1095                                 throw new NotSupportedException ();
1096                         };
1097                         try {
1098                                 VM_SetProtocolVersion (MAJOR_VERSION, MINOR_VERSION);
1099                         } catch (NotSupportedException) {
1100                         }
1101                         ErrorHandler = OrigErrorHandler;
1102                 }
1103
1104                 internal byte[] ReadPacket () {
1105                         // FIXME: Throw ClosedConnectionException () if the connection is closed
1106                         // FIXME: Throw ClosedConnectionException () if another thread closes the connection
1107                         // FIXME: Locking
1108                         byte[] header = new byte [HEADER_LENGTH];
1109
1110                         int len = Receive (header, 0, header.Length);
1111                         if (len == 0)
1112                                 return new byte [0];
1113                         if (len != HEADER_LENGTH) {
1114                                 // FIXME:
1115                                 throw new IOException ("Packet of length " + len + " is read.");
1116                         }
1117
1118                         int packetLength = GetPacketLength (header);
1119                         if (packetLength < 11)
1120                                 throw new IOException ("Invalid packet length.");
1121
1122                         if (packetLength == 11) {
1123                                 return header;
1124                         } else {
1125                                 byte[] buf = new byte [packetLength];
1126                                 for (int i = 0; i < header.Length; ++i)
1127                                         buf [i] = header [i];
1128                                 len = Receive (buf, header.Length, packetLength - header.Length);
1129                                 if (len != packetLength - header.Length)
1130                                         throw new IOException ();
1131                                 return buf;
1132                         }
1133                 }
1134
1135                 internal void WritePacket (byte[] packet) {
1136                         // FIXME: Throw ClosedConnectionException () if the connection is closed
1137                         // FIXME: Throw ClosedConnectionException () if another thread closes the connection
1138                         // FIXME: Locking
1139                         TransportSend (packet, 0, packet.Length);
1140                 }
1141
1142                 internal void Close () {
1143                         closed = true;
1144                 }
1145
1146                 internal bool IsClosed {
1147                         get {
1148                                 return closed;
1149                         }
1150                 }
1151
1152                 bool disconnected;
1153
1154                 void receiver_thread_main () {
1155                         while (!closed) {
1156                                 try {
1157                                         bool res = ReceivePacket ();
1158                                         if (!res)
1159                                                 break;
1160                                 } catch (Exception ex) {
1161                                         if (!closed) {
1162                                                 Console.WriteLine (ex);
1163                                         }
1164                                         break;
1165                                 }
1166                         }
1167
1168                         lock (reply_packets_monitor) {
1169                                 disconnected = true;
1170                                 Monitor.PulseAll (reply_packets_monitor);
1171                                 TransportClose ();
1172                         }
1173                         EventHandler.VMDisconnect (0, 0, null);
1174                 }
1175
1176                 bool ReceivePacket () {
1177                                 byte[] packet = ReadPacket ();
1178
1179                                 if (packet.Length == 0) {
1180                                         return false;
1181                                 }
1182
1183                                 if (IsReplyPacket (packet)) {
1184                                         int id = GetPacketId (packet);
1185                                         ReplyCallback cb = null;
1186                                         lock (reply_packets_monitor) {
1187                                                 reply_cbs.TryGetValue (id, out cb);
1188                                                 if (cb == null) {
1189                                                         reply_packets [id] = packet;
1190                                                         Monitor.PulseAll (reply_packets_monitor);
1191                                                 } else {
1192                                                         int c = reply_cb_counts [id];
1193                                                         c --;
1194                                                         if (c == 0) {
1195                                                                 reply_cbs.Remove (id);
1196                                                                 reply_cb_counts.Remove (id);
1197                                                         }
1198                                                 }
1199                                         }
1200
1201                                         if (cb != null)
1202                                                 cb.Invoke (id, packet);
1203                                 } else {
1204                                         PacketReader r = new PacketReader (packet);
1205
1206                                         if (r.CommandSet == CommandSet.EVENT && r.Command == (int)CmdEvent.COMPOSITE) {
1207                                                 int spolicy = r.ReadByte ();
1208                                                 int nevents = r.ReadInt ();
1209
1210                                                 SuspendPolicy suspend_policy = decode_suspend_policy (spolicy);
1211
1212                                                 EventInfo[] events = new EventInfo [nevents];
1213
1214                                                 for (int i = 0; i < nevents; ++i) {
1215                                                         EventKind kind = (EventKind)r.ReadByte ();
1216                                                         int req_id = r.ReadInt ();
1217
1218                                                         EventType etype = (EventType)kind;
1219
1220                                                         if (kind == EventKind.VM_START) {
1221                                                                 long thread_id = r.ReadId ();
1222                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id };
1223                                                                 //EventHandler.VMStart (req_id, thread_id, null);
1224                                                         } else if (kind == EventKind.VM_DEATH) {
1225                                                                 //EventHandler.VMDeath (req_id, 0, null);
1226                                                                 events [i] = new EventInfo (etype, req_id) { };
1227                                                         } else if (kind == EventKind.THREAD_START) {
1228                                                                 long thread_id = r.ReadId ();
1229                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = thread_id };
1230                                                                 //EventHandler.ThreadStart (req_id, thread_id, thread_id);
1231                                                         } else if (kind == EventKind.THREAD_DEATH) {
1232                                                                 long thread_id = r.ReadId ();
1233                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = thread_id };
1234                                                                 //EventHandler.ThreadDeath (req_id, thread_id, thread_id);
1235                                                         } else if (kind == EventKind.ASSEMBLY_LOAD) {
1236                                                                 long thread_id = r.ReadId ();
1237                                                                 long id = r.ReadId ();
1238                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1239                                                                 //EventHandler.AssemblyLoad (req_id, thread_id, id);
1240                                                         } else if (kind == EventKind.ASSEMBLY_UNLOAD) {
1241                                                                 long thread_id = r.ReadId ();
1242                                                                 long id = r.ReadId ();
1243                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1244                                                                 //EventHandler.AssemblyUnload (req_id, thread_id, id);
1245                                                         } else if (kind == EventKind.TYPE_LOAD) {
1246                                                                 long thread_id = r.ReadId ();
1247                                                                 long id = r.ReadId ();
1248                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1249                                                                 //EventHandler.TypeLoad (req_id, thread_id, id);
1250                                                         } else if (kind == EventKind.METHOD_ENTRY) {
1251                                                                 long thread_id = r.ReadId ();
1252                                                                 long id = r.ReadId ();
1253                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1254                                                                 //EventHandler.MethodEntry (req_id, thread_id, id);
1255                                                         } else if (kind == EventKind.METHOD_EXIT) {
1256                                                                 long thread_id = r.ReadId ();
1257                                                                 long id = r.ReadId ();
1258                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1259                                                                 //EventHandler.MethodExit (req_id, thread_id, id);
1260                                                         } else if (kind == EventKind.BREAKPOINT) {
1261                                                                 long thread_id = r.ReadId ();
1262                                                                 long id = r.ReadId ();
1263                                                                 long loc = r.ReadLong ();
1264                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id, Location = loc };
1265                                                                 //EventHandler.Breakpoint (req_id, thread_id, id, loc);
1266                                                         } else if (kind == EventKind.STEP) {
1267                                                                 long thread_id = r.ReadId ();
1268                                                                 long id = r.ReadId ();
1269                                                                 long loc = r.ReadLong ();
1270                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id, Location = loc };
1271                                                                 //EventHandler.Step (req_id, thread_id, id, loc);
1272                                                         } else if (kind == EventKind.EXCEPTION) {
1273                                                                 long thread_id = r.ReadId ();
1274                                                                 long id = r.ReadId ();
1275                                                                 long loc = 0; // FIXME
1276                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id, Location = loc };
1277                                                                 //EventHandler.Exception (req_id, thread_id, id, loc);
1278                                                         } else if (kind == EventKind.APPDOMAIN_CREATE) {
1279                                                                 long thread_id = r.ReadId ();
1280                                                                 long id = r.ReadId ();
1281                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1282                                                                 //EventHandler.AppDomainCreate (req_id, thread_id, id);
1283                                                         } else if (kind == EventKind.APPDOMAIN_UNLOAD) {
1284                                                                 long thread_id = r.ReadId ();
1285                                                                 long id = r.ReadId ();
1286                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id };
1287                                                                 //EventHandler.AppDomainUnload (req_id, thread_id, id);
1288                                                         } else if (kind == EventKind.USER_BREAK) {
1289                                                                 long thread_id = r.ReadId ();
1290                                                                 long id = 0;
1291                                                                 long loc = 0;
1292                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Id = id, Location = loc };
1293                                                                 //EventHandler.Exception (req_id, thread_id, id, loc);
1294                                                         } else if (kind == EventKind.USER_LOG) {
1295                                                                 long thread_id = r.ReadId ();
1296                                                                 int level = r.ReadInt ();
1297                                                                 string category = r.ReadString ();
1298                                                                 string message = r.ReadString ();
1299                                                                 events [i] = new EventInfo (etype, req_id) { ThreadId = thread_id, Level = level, Category = category, Message = message };
1300                                                                 //EventHandler.Exception (req_id, thread_id, id, loc);
1301                                                         } else if (kind == EventKind.KEEPALIVE) {
1302                                                                 events [i] = new EventInfo (etype, req_id) { };
1303                                                         } else {
1304                                                                 throw new NotImplementedException ("Unknown event kind: " + kind);
1305                                                         }
1306                                                 }
1307
1308                                                 EventHandler.Events (suspend_policy, events);
1309                                         }
1310                                 }
1311
1312                                 return true;
1313                 }
1314
1315                 internal IEventHandler EventHandler {
1316                         get; set;
1317                 }
1318
1319                 static String CommandString (CommandSet command_set, int command)
1320                 {
1321                         string cmd;
1322                         switch (command_set) {
1323                         case CommandSet.VM:
1324                                 cmd = ((CmdVM)command).ToString ();
1325                                 break;
1326                         case CommandSet.OBJECT_REF:
1327                                 cmd = ((CmdObjectRef)command).ToString ();
1328                                 break;
1329                         case CommandSet.STRING_REF:
1330                                 cmd = ((CmdStringRef)command).ToString ();
1331                                 break;
1332                         case CommandSet.THREAD:
1333                                 cmd = ((CmdThread)command).ToString ();
1334                                 break;
1335                         case CommandSet.ARRAY_REF:
1336                                 cmd = ((CmdArrayRef)command).ToString ();
1337                                 break;
1338                         case CommandSet.EVENT_REQUEST:
1339                                 cmd = ((CmdEventRequest)command).ToString ();
1340                                 break;
1341                         case CommandSet.STACK_FRAME:
1342                                 cmd = ((CmdStackFrame)command).ToString ();
1343                                 break;
1344                         case CommandSet.APPDOMAIN:
1345                                 cmd = ((CmdAppDomain)command).ToString ();
1346                                 break;
1347                         case CommandSet.ASSEMBLY:
1348                                 cmd = ((CmdAssembly)command).ToString ();
1349                                 break;
1350                         case CommandSet.METHOD:
1351                                 cmd = ((CmdMethod)command).ToString ();
1352                                 break;
1353                         case CommandSet.TYPE:
1354                                 cmd = ((CmdType)command).ToString ();
1355                                 break;
1356                         case CommandSet.MODULE:
1357                                 cmd = ((CmdModule)command).ToString ();
1358                                 break;
1359                         case CommandSet.EVENT:
1360                                 cmd = ((CmdEvent)command).ToString ();
1361                                 break;
1362                         default:
1363                                 cmd = command.ToString ();
1364                                 break;
1365                         }
1366                         return string.Format ("[{0} {1}]", command_set, cmd);
1367                 }
1368
1369                 long total_protocol_ticks;
1370
1371                 void LogPacket (int packet_id, byte[] encoded_packet, byte[] reply_packet, CommandSet command_set, int command, Stopwatch watch) {
1372                         watch.Stop ();
1373                         total_protocol_ticks += watch.ElapsedTicks;
1374                         var ts = TimeSpan.FromTicks (total_protocol_ticks);
1375                         string msg = string.Format ("Packet: {0} sent: {1} received: {2} ms: {3} total ms: {4} {5}",
1376                            packet_id, encoded_packet.Length, reply_packet.Length, watch.ElapsedMilliseconds,
1377                            (ts.Seconds * 1000) + ts.Milliseconds,
1378                            CommandString (command_set, command));
1379
1380                         LoggingStream.WriteLine (msg);
1381                         LoggingStream.Flush ();
1382                 }
1383
1384                 /* Send a request and call cb when a result is received */
1385                 int Send (CommandSet command_set, int command, PacketWriter packet, Action<PacketReader> cb, int count) {
1386                         int id = IdGenerator;
1387
1388                         Stopwatch watch = null;
1389                         if (EnableConnectionLogging)
1390                                 watch = Stopwatch.StartNew ();
1391
1392                         byte[] encoded_packet;
1393                         if (packet == null)
1394                                 encoded_packet = EncodePacket (id, (int)command_set, command, null, 0);
1395                         else
1396                                 encoded_packet = EncodePacket (id, (int)command_set, command, packet.Data, packet.Offset);
1397
1398                         lock (reply_packets_monitor) {
1399                                 reply_cbs [id] = delegate (int packet_id, byte[] p) {
1400                                         if (EnableConnectionLogging)
1401                                                 LogPacket (packet_id, encoded_packet, p, command_set, command, watch);
1402                                         /* Run the callback on a tp thread to avoid blocking the receive thread */
1403                                         PacketReader r = new PacketReader (p);
1404                                         cb.BeginInvoke (r, null, null);
1405                                 };
1406                                 reply_cb_counts [id] = count;
1407                         }
1408
1409                         WritePacket (encoded_packet);
1410
1411                         return id;
1412                 }
1413
1414                 PacketReader SendReceive (CommandSet command_set, int command, PacketWriter packet) {
1415                         int id = IdGenerator;
1416                         Stopwatch watch = null;
1417
1418                         if (disconnected)
1419                                 throw new VMDisconnectedException ();
1420
1421                         if (EnableConnectionLogging)
1422                                 watch = Stopwatch.StartNew ();
1423
1424                         byte[] encoded_packet;
1425
1426                         if (packet == null)
1427                                 encoded_packet = EncodePacket (id, (int)command_set, command, null, 0);
1428                         else
1429                                 encoded_packet = EncodePacket (id, (int)command_set, command, packet.Data, packet.Offset);
1430
1431                         WritePacket (encoded_packet);
1432
1433                         int packetId = id;
1434
1435                         /* Wait for the reply packet */
1436                         while (true) {
1437                                 lock (reply_packets_monitor) {
1438                                         if (reply_packets.ContainsKey (packetId)) {
1439                                                 byte[] reply = reply_packets [packetId];
1440                                                 reply_packets.Remove (packetId);
1441                                                 PacketReader r = new PacketReader (reply);
1442
1443                                                 if (EnableConnectionLogging)
1444                                                         LogPacket (packetId, encoded_packet, reply, command_set, command, watch);
1445                                                 if (r.ErrorCode != 0) {
1446                                                         if (ErrorHandler != null)
1447                                                                 ErrorHandler (this, new ErrorHandlerEventArgs () { ErrorCode = (ErrorCode)r.ErrorCode });
1448                                                         throw new NotImplementedException ("No error handler set.");
1449                                                 } else {
1450                                                         return r;
1451                                                 }
1452                                         } else {
1453                                                 if (disconnected)
1454                                                         throw new VMDisconnectedException ();
1455                                                 Monitor.Wait (reply_packets_monitor);
1456                                         }
1457                                 }
1458                         }
1459                 }
1460
1461                 PacketReader SendReceive (CommandSet command_set, int command) {
1462                         return SendReceive (command_set, command, null);
1463                 }
1464
1465                 int packet_id_generator;
1466
1467                 int IdGenerator {
1468                         get {
1469                                 return Interlocked.Increment (ref packet_id_generator);
1470                         }
1471                 }
1472
1473                 CattrInfo[] ReadCattrs (PacketReader r) {
1474                         CattrInfo[] res = new CattrInfo [r.ReadInt ()];
1475                         for (int i = 0; i < res.Length; ++i) {
1476                                 CattrInfo info = new CattrInfo ();
1477                                 info.ctor_id = r.ReadId ();
1478                                 info.ctor_args = new ValueImpl [r.ReadInt ()];
1479                                 for (int j = 0; j < info.ctor_args.Length; ++j) {
1480                                         info.ctor_args [j] = r.ReadValue ();
1481                                 }
1482                                 info.named_args = new CattrNamedArgInfo [r.ReadInt ()];
1483                                 for (int j = 0; j < info.named_args.Length; ++j) {
1484                                         CattrNamedArgInfo arg = new CattrNamedArgInfo ();
1485                                         int arg_type = r.ReadByte ();
1486                                         arg.is_property = arg_type == 0x54;
1487                                         arg.id = r.ReadId ();
1488                                         arg.value = r.ReadValue ();
1489                                         info.named_args [j] = arg;
1490                                 }
1491                                 res [i] = info;
1492                         }
1493                         return res;
1494                 }
1495
1496                 static ElementType TypeCodeToElementType (TypeCode c) {
1497                         switch (c) {
1498                         case TypeCode.Boolean:
1499                                 return ElementType.Boolean;
1500                         case TypeCode.Char:
1501                                 return ElementType.Char;
1502                         case TypeCode.SByte:
1503                                 return ElementType.I1;
1504                         case TypeCode.Byte:
1505                                 return ElementType.U1;
1506                         case TypeCode.Int16:
1507                                 return ElementType.I2;
1508                         case TypeCode.UInt16:
1509                                 return ElementType.U2;
1510                         case TypeCode.Int32:
1511                                 return ElementType.I4;
1512                         case TypeCode.UInt32:
1513                                 return ElementType.U4;
1514                         case TypeCode.Int64:
1515                                 return ElementType.I8;
1516                         case TypeCode.UInt64:
1517                                 return ElementType.U8;
1518                         case TypeCode.Single:
1519                                 return ElementType.R4;
1520                         case TypeCode.Double:
1521                                 return ElementType.R8;
1522                         default:
1523                                 throw new NotImplementedException ();
1524                         }
1525                 }
1526
1527                 /*
1528                  * Implementation of debugger commands
1529                  */
1530
1531                 internal VersionInfo VM_GetVersion () {
1532                         var res = SendReceive (CommandSet.VM, (int)CmdVM.VERSION, null);
1533                         VersionInfo info = new VersionInfo ();
1534                         info.VMVersion = res.ReadString ();
1535                         info.MajorVersion = res.ReadInt ();
1536                         info.MinorVersion = res.ReadInt ();
1537                         return info;
1538                 }
1539
1540                 internal void VM_SetProtocolVersion (int major, int minor) {
1541                         SendReceive (CommandSet.VM, (int)CmdVM.SET_PROTOCOL_VERSION, new PacketWriter ().WriteInt (major).WriteInt (minor));
1542                 }
1543
1544                 internal long[] VM_GetThreads () {
1545                         var res = SendReceive (CommandSet.VM, (int)CmdVM.ALL_THREADS, null);
1546                         int len = res.ReadInt ();
1547                         long[] arr = new long [len];
1548                         for (int i = 0; i < len; ++i)
1549                                 arr [i] = res.ReadId ();
1550                         return arr;
1551                 }
1552
1553                 internal void VM_Suspend () {
1554                         SendReceive (CommandSet.VM, (int)CmdVM.SUSPEND);
1555                 }
1556
1557                 internal void VM_Resume () {
1558                         SendReceive (CommandSet.VM, (int)CmdVM.RESUME);
1559                 }
1560
1561                 internal void VM_Exit (int exitCode) {
1562                         SendReceive (CommandSet.VM, (int)CmdVM.EXIT, new PacketWriter ().WriteInt (exitCode));
1563                 }
1564
1565                 internal void VM_Dispose () {
1566                         SendReceive (CommandSet.VM, (int)CmdVM.DISPOSE);
1567                 }
1568
1569                 internal ValueImpl VM_InvokeMethod (long thread, long method, ValueImpl this_arg, ValueImpl[] arguments, InvokeFlags flags, out ValueImpl exc) {
1570                         exc = null;
1571                         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));
1572                         if (r.ReadByte () == 0) {
1573                                 exc = r.ReadValue ();
1574                                 return null;
1575                         } else {
1576                                 return r.ReadValue ();
1577                         }
1578                 }
1579
1580                 internal delegate void InvokeMethodCallback (ValueImpl v, ValueImpl exc, ErrorCode error, object state);
1581
1582                 internal int VM_BeginInvokeMethod (long thread, long method, ValueImpl this_arg, ValueImpl[] arguments, InvokeFlags flags, InvokeMethodCallback callback, object state) {
1583                         return 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) {
1584                                         ValueImpl v, exc;
1585
1586                                         if (r.ErrorCode != 0) {
1587                                                 callback (null, null, (ErrorCode)r.ErrorCode, state);
1588                                         } else {
1589                                                 if (r.ReadByte () == 0) {
1590                                                         exc = r.ReadValue ();
1591                                                         v = null;
1592                                                 } else {
1593                                                         v = r.ReadValue ();
1594                                                         exc = null;
1595                                                 }
1596
1597                                                 callback (v, exc, 0, state);
1598                                         }
1599                                 }, 1);
1600                 }
1601
1602                 internal int VM_BeginInvokeMethods (long thread, long[] methods, ValueImpl this_arg, List<ValueImpl[]> arguments, InvokeFlags flags, InvokeMethodCallback callback, object state) {
1603                         // FIXME: Merge this with INVOKE_METHOD
1604                         var w = new PacketWriter ();
1605                         w.WriteId (thread);
1606                         w.WriteInt ((int)flags);
1607                         w.WriteInt (methods.Length);
1608                         for (int i = 0; i < methods.Length; ++i) {
1609                                 w.WriteId (methods [i]);
1610                                 w.WriteValue (this_arg);
1611                                 w.WriteInt (arguments [i].Length);
1612                                 w.WriteValues (arguments [i]);
1613                         }
1614                         return Send (CommandSet.VM, (int)CmdVM.INVOKE_METHODS, w, delegate (PacketReader r) {
1615                                         ValueImpl v, exc;
1616
1617                                         if (r.ErrorCode != 0) {
1618                                                 callback (null, null, (ErrorCode)r.ErrorCode, state);
1619                                         } else {
1620                                                 if (r.ReadByte () == 0) {
1621                                                         exc = r.ReadValue ();
1622                                                         v = null;
1623                                                 } else {
1624                                                         v = r.ReadValue ();
1625                                                         exc = null;
1626                                                 }
1627
1628                                                 callback (v, exc, 0, state);
1629                                         }
1630                                 }, methods.Length);
1631                 }
1632
1633                 internal void VM_AbortInvoke (long thread, int id)
1634                 {
1635                         SendReceive (CommandSet.VM, (int)CmdVM.ABORT_INVOKE, new PacketWriter ().WriteId (thread).WriteInt (id));
1636                 }
1637
1638                 internal void SetSocketTimeouts (int send_timeout, int receive_timeout, int keepalive_interval)
1639                 {
1640                         TransportSetTimeouts (send_timeout, receive_timeout);
1641                         SendReceive (CommandSet.VM, (int)CmdVM.SET_KEEPALIVE, new PacketWriter ().WriteId (keepalive_interval));
1642                 }
1643
1644                 internal long[] VM_GetTypesForSourceFile (string fname, bool ignoreCase) {
1645                         var res = SendReceive (CommandSet.VM, (int)CmdVM.GET_TYPES_FOR_SOURCE_FILE, new PacketWriter ().WriteString (fname).WriteBool (ignoreCase));
1646                         int count = res.ReadInt ();
1647                         long[] types = new long [count];
1648                         for (int i = 0; i < count; ++i)
1649                                 types [i] = res.ReadId ();
1650                         return types;
1651                 }
1652
1653                 internal long[] VM_GetTypes (string name, bool ignoreCase) {
1654                         var res = SendReceive (CommandSet.VM, (int)CmdVM.GET_TYPES, new PacketWriter ().WriteString (name).WriteBool (ignoreCase));
1655                         int count = res.ReadInt ();
1656                         long[] types = new long [count];
1657                         for (int i = 0; i < count; ++i)
1658                                 types [i] = res.ReadId ();
1659                         return types;
1660                 }
1661
1662                 /*
1663                  * DOMAIN
1664                  */
1665
1666                 internal long RootDomain {
1667                         get {
1668                                 return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_ROOT_DOMAIN, null).ReadId ();
1669                         }
1670                 }
1671
1672                 internal string Domain_GetName (long id) {
1673                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_FRIENDLY_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1674                 }
1675
1676                 internal long[] Domain_GetAssemblies (long id) {
1677                         var res = SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_ASSEMBLIES, new PacketWriter ().WriteId (id));
1678                         int count = res.ReadInt ();
1679                         long[] assemblies = new long [count];
1680                         for (int i = 0; i < count; ++i)
1681                                 assemblies [i] = res.ReadId ();
1682                         return assemblies;
1683                 }
1684
1685                 internal long Domain_GetEntryAssembly (long id) {
1686                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_ENTRY_ASSEMBLY, new PacketWriter ().WriteId (id)).ReadId ();
1687                 }
1688
1689                 internal long Domain_GetCorlib (long id) {
1690                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.GET_CORLIB, new PacketWriter ().WriteId (id)).ReadId ();
1691                 }
1692
1693                 internal long Domain_CreateString (long id, string s) {
1694                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.CREATE_STRING, new PacketWriter ().WriteId (id).WriteString (s)).ReadId ();
1695                 }
1696
1697                 internal long Domain_CreateBoxedValue (long id, long type_id, ValueImpl v) {
1698                         return SendReceive (CommandSet.APPDOMAIN, (int)CmdAppDomain.CREATE_BOXED_VALUE, new PacketWriter ().WriteId (id).WriteId (type_id).WriteValue (v)).ReadId ();
1699                 }
1700
1701                 /*
1702                  * METHOD
1703                  */
1704
1705                 internal string Method_GetName (long id) {
1706                         return SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1707                 }
1708
1709                 internal long Method_GetDeclaringType (long id) {
1710                         return SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_DECLARING_TYPE, new PacketWriter ().WriteId (id)).ReadId ();
1711                 }
1712
1713                 internal DebugInfo Method_GetDebugInfo (long id) {
1714                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_DEBUG_INFO, new PacketWriter ().WriteId (id));
1715
1716                         DebugInfo info = new DebugInfo ();
1717                         info.max_il_offset = res.ReadInt ();
1718
1719                         SourceInfo[] sources = null;
1720                         if (Version.AtLeast (2, 13)) {
1721                                 int n = res.ReadInt ();
1722                                 sources = new SourceInfo [n];
1723                                 for (int i = 0; i < n; ++i) {
1724                                         sources [i].source_file = res.ReadString ();
1725                                         if (Version.AtLeast (2, 14)) {
1726                                                 sources [i].hash = new byte [16];
1727                                                 for (int j = 0; j < 16; ++j)
1728                                                         sources [i].hash [j] = (byte)res.ReadByte ();
1729                                         }
1730                                 }
1731                         } else {
1732                                 sources = new SourceInfo [1];
1733                                 sources [0].source_file = res.ReadString ();
1734                         }
1735
1736                         int n_il_offsets = res.ReadInt ();
1737                         info.il_offsets = new int [n_il_offsets];
1738                         info.line_numbers = new int [n_il_offsets];
1739                         info.source_files = new SourceInfo [n_il_offsets];
1740                         info.column_numbers = new int [n_il_offsets];
1741                         for (int i = 0; i < n_il_offsets; ++i) {
1742                                 info.il_offsets [i] = res.ReadInt ();
1743                                 info.line_numbers [i] = res.ReadInt ();
1744                                 if (Version.AtLeast (2, 12)) {
1745                                         int idx = res.ReadInt ();
1746                                         info.source_files [i] = idx >= 0 ? sources [idx] : default (SourceInfo);
1747                                 } else {
1748                                         info.source_files [i] = sources [0];
1749                                 }
1750                                 if (Version.AtLeast (2, 19))
1751                                         info.column_numbers [i] = res.ReadInt ();
1752                                 else
1753                                         info.column_numbers [i] = 0;
1754                         }
1755
1756                         return info;
1757                 }
1758
1759                 internal ParamInfo Method_GetParamInfo (long id) {
1760                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_PARAM_INFO, new PacketWriter ().WriteId (id));
1761
1762                         ParamInfo info = new ParamInfo ();
1763                         info.call_conv = res.ReadInt ();
1764                         info.param_count = res.ReadInt ();
1765                         info.generic_param_count = res.ReadInt ();
1766                         info.ret_type = res.ReadId ();
1767                         info.param_types = new long [info.param_count];
1768                         for (int i = 0; i < info.param_count; ++i)
1769                                 info.param_types [i] = res.ReadId ();
1770                         info.param_names = new string [info.param_count];
1771                         for (int i = 0; i < info.param_count; ++i)
1772                                 info.param_names [i] = res.ReadString ();
1773
1774                         return info;
1775                 }
1776
1777                 internal LocalsInfo Method_GetLocalsInfo (long id) {
1778                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_LOCALS_INFO, new PacketWriter ().WriteId (id));
1779
1780                         LocalsInfo info = new LocalsInfo ();
1781                         int nlocals = res.ReadInt ();
1782                         info.types = new long [nlocals];
1783                         for (int i = 0; i < nlocals; ++i)
1784                                 info.types [i] = res.ReadId ();
1785                         info.names = new string [nlocals];
1786                         for (int i = 0; i < nlocals; ++i)
1787                                 info.names [i] = res.ReadString ();
1788                         info.live_range_start = new int [nlocals];
1789                         info.live_range_end = new int [nlocals];
1790                         for (int i = 0; i < nlocals; ++i) {
1791                                 info.live_range_start [i] = res.ReadInt ();
1792                                 info.live_range_end [i] = res.ReadInt ();
1793                         }
1794
1795                         return info;
1796                 }
1797
1798                 internal MethodInfo Method_GetInfo (long id) {
1799                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_INFO, new PacketWriter ().WriteId (id));
1800
1801                         MethodInfo info = new MethodInfo ();
1802                         info.attributes = res.ReadInt ();
1803                         info.iattributes = res.ReadInt ();
1804                         info.token = res.ReadInt ();
1805                         if (Version.AtLeast (2, 12)) {
1806                                 int attrs = res.ReadByte ();
1807                                 if ((attrs & (1 << 0)) != 0)
1808                                         info.is_gmd = true;
1809                                 if ((attrs & (1 << 1)) != 0)
1810                                         info.is_generic_method = true;
1811                                 info.gmd = res.ReadId ();
1812                                 if (Version.AtLeast (2, 15)) {
1813                                         if (info.is_generic_method) {
1814                                                 int n = res.ReadInt ();
1815                                                 info.type_args = res.ReadIds (n);
1816                                         }
1817                                 }
1818                         }
1819                         return info;
1820                 }
1821
1822                 internal MethodBodyInfo Method_GetBody (long id) {
1823                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_BODY, new PacketWriter ().WriteId (id));
1824
1825                         MethodBodyInfo info = new MethodBodyInfo ();
1826                         info.il = new byte [res.ReadInt ()];
1827                         for (int i = 0; i < info.il.Length; ++i)
1828                                 info.il [i] = (byte)res.ReadByte ();
1829
1830                         if (Version.AtLeast (2, 18)) {
1831                                 info.clauses = new ExceptionClauseInfo [res.ReadInt ()];
1832
1833                                 for (int i = 0; i < info.clauses.Length; ++i) {
1834                                         var clause = new ExceptionClauseInfo {
1835                                                 flags = (ExceptionClauseFlags) res.ReadInt (),
1836                                                 try_offset = res.ReadInt (),
1837                                                 try_length = res.ReadInt (),
1838                                                 handler_offset = res.ReadInt (),
1839                                                 handler_length = res.ReadInt (),
1840                                         };
1841
1842                                         if (clause.flags == ExceptionClauseFlags.None)
1843                                                 clause.catch_type_id = res.ReadId ();
1844                                         else if (clause.flags == ExceptionClauseFlags.Filter)
1845                                                 clause.filter_offset = res.ReadInt ();
1846
1847                                         info.clauses [i] = clause;
1848                                 }
1849                         } else
1850                                 info.clauses = new ExceptionClauseInfo [0];
1851
1852                         return info;
1853                 }
1854
1855                 internal ResolvedToken Method_ResolveToken (long id, int token) {
1856                         var res = SendReceive (CommandSet.METHOD, (int)CmdMethod.RESOLVE_TOKEN, new PacketWriter ().WriteId (id).WriteInt (token));
1857
1858                         TokenType type = (TokenType)res.ReadByte ();
1859                         switch (type) {
1860                         case TokenType.STRING:
1861                                 return new ResolvedToken () { Type = type, Str = res.ReadString () };
1862                         case TokenType.TYPE:
1863                         case TokenType.METHOD:
1864                         case TokenType.FIELD:
1865                                 return new ResolvedToken () { Type = type, Id = res.ReadId () };
1866                         case TokenType.UNKNOWN:
1867                                 return new ResolvedToken () { Type = type };
1868                         default:
1869                                 throw new NotImplementedException ();
1870                         }
1871                 }
1872
1873                 internal CattrInfo[] Method_GetCustomAttributes (long id, long attr_type_id, bool inherit) {
1874                         PacketReader r = SendReceive (CommandSet.METHOD, (int)CmdMethod.GET_CATTRS, new PacketWriter ().WriteId (id).WriteId (attr_type_id));
1875                         return ReadCattrs (r);
1876                 }
1877
1878                 /*
1879                  * THREAD
1880                  */
1881
1882                 internal string Thread_GetName (long id) {
1883                         return SendReceive (CommandSet.THREAD, (int)CmdThread.GET_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1884                 }
1885
1886                 internal FrameInfo[] Thread_GetFrameInfo (long id, int start_frame, int length) {
1887                         var res = SendReceive (CommandSet.THREAD, (int)CmdThread.GET_FRAME_INFO, new PacketWriter ().WriteId (id).WriteInt (start_frame).WriteInt (length));
1888                         int count = res.ReadInt ();
1889
1890                         var frames = new FrameInfo [count];
1891                         for (int i = 0; i < count; ++i) {
1892                                 var f = new FrameInfo ();
1893                                 f.id = res.ReadInt ();
1894                                 f.method = res.ReadId ();
1895                                 f.il_offset = res.ReadInt ();
1896                                 f.flags = (StackFrameFlags)res.ReadByte ();
1897                                 frames [i] = f;
1898                         }
1899
1900                         return frames;
1901                 }
1902
1903                 internal int Thread_GetState (long id) {
1904                         return SendReceive (CommandSet.THREAD, (int)CmdThread.GET_STATE, new PacketWriter ().WriteId (id)).ReadInt ();
1905                 }
1906
1907                 internal ThreadInfo Thread_GetInfo (long id) {
1908                         PacketReader r = SendReceive (CommandSet.THREAD, (int)CmdThread.GET_INFO, new PacketWriter ().WriteId (id));
1909
1910                         ThreadInfo res = new ThreadInfo () { is_thread_pool = r.ReadByte () > 0 ? true : false };
1911
1912                         return res;
1913                 }
1914
1915                 internal long Thread_GetId (long id) {
1916                         return SendReceive (CommandSet.THREAD, (int)CmdThread.GET_ID, new PacketWriter ().WriteId (id)).ReadLong ();
1917                 }
1918
1919                 internal long Thread_GetTID (long id) {
1920                         return SendReceive (CommandSet.THREAD, (int)CmdThread.GET_TID, new PacketWriter ().WriteId (id)).ReadLong ();
1921                 }
1922
1923                 /*
1924                  * MODULE
1925                  */
1926
1927                 internal ModuleInfo Module_GetInfo (long id) {
1928                         PacketReader r = SendReceive (CommandSet.MODULE, (int)CmdModule.GET_INFO, new PacketWriter ().WriteId (id));
1929                         ModuleInfo info = new ModuleInfo { Name = r.ReadString (), ScopeName = r.ReadString (), FQName = r.ReadString (), Guid = r.ReadString (), Assembly = r.ReadId () };
1930                         return info;
1931                 }
1932
1933                 /*
1934                  * ASSEMBLY
1935                  */
1936
1937                 internal string Assembly_GetLocation (long id) {
1938                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_LOCATION, new PacketWriter ().WriteId (id)).ReadString ();
1939                 }
1940
1941                 internal long Assembly_GetEntryPoint (long id) {
1942                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_ENTRY_POINT, new PacketWriter ().WriteId (id)).ReadId ();
1943                 }
1944
1945                 internal long Assembly_GetManifestModule (long id) {
1946                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_MANIFEST_MODULE, new PacketWriter ().WriteId (id)).ReadId ();
1947                 }
1948
1949                 internal long Assembly_GetObject (long id) {
1950                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_OBJECT, new PacketWriter ().WriteId (id)).ReadId ();
1951                 }
1952
1953                 internal long Assembly_GetType (long id, string name, bool ignoreCase) {
1954                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_TYPE, new PacketWriter ().WriteId (id).WriteString (name).WriteBool (ignoreCase)).ReadId ();
1955                 }
1956
1957                 internal string Assembly_GetName (long id) {
1958                         return SendReceive (CommandSet.ASSEMBLY, (int)CmdAssembly.GET_NAME, new PacketWriter ().WriteId (id)).ReadString ();
1959                 }
1960
1961                 /*
1962                  * TYPE
1963                  */
1964
1965                 internal TypeInfo Type_GetInfo (long id) {
1966                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_INFO, new PacketWriter ().WriteId (id));
1967                         TypeInfo res = new TypeInfo ();
1968
1969                         res.ns = r.ReadString ();
1970                         res.name = r.ReadString ();
1971                         res.full_name = r.ReadString ();
1972                         res.assembly = r.ReadId ();
1973                         res.module = r.ReadId ();
1974                         res.base_type = r.ReadId ();
1975                         res.element_type = r.ReadId ();
1976                         res.token = r.ReadInt ();
1977                         res.rank = r.ReadByte ();
1978                         res.attributes = r.ReadInt ();
1979                         int b = r.ReadByte ();
1980                         res.is_byref = (b & 1) != 0;
1981                         res.is_pointer = (b & 2) != 0;
1982                         res.is_primitive = (b & 4) != 0;
1983                         res.is_valuetype = (b & 8) != 0;
1984                         res.is_enum = (b & 16) != 0;
1985                         res.is_gtd = (b & 32) != 0;
1986                         res.is_generic_type = (b & 64) != 0;
1987
1988                         int nested_len = r.ReadInt ();
1989                         res.nested = new long [nested_len];
1990                         for (int i = 0; i < nested_len; ++i)
1991                                 res.nested [i] = r.ReadId ();
1992
1993                         if (Version.AtLeast (2, 12))
1994                                 res.gtd = r.ReadId ();
1995                         if (Version.AtLeast (2, 15) && res.is_generic_type) {
1996                                 int n = r.ReadInt ();
1997                                 res.type_args = r.ReadIds (n);
1998                         }
1999
2000                         return res;
2001                 }
2002
2003                 internal long[] Type_GetMethods (long id) {
2004                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_METHODS, new PacketWriter ().WriteId (id));
2005
2006                         int n = r.ReadInt ();
2007                         long[] res = new long [n];
2008                         for (int i = 0; i < n; ++i)
2009                                 res [i] = r.ReadId ();
2010                         return res;
2011                 }
2012
2013                 internal long[] Type_GetFields (long id, out string[] names, out long[] types, out int[] attrs) {
2014                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_FIELDS, new PacketWriter ().WriteId (id));
2015
2016                         int n = r.ReadInt ();
2017                         long[] res = new long [n];
2018                         names = new string [n];
2019                         types = new long [n];
2020                         attrs = new int [n];
2021                         for (int i = 0; i < n; ++i) {
2022                                 res [i] = r.ReadId ();
2023                                 names [i] = r.ReadString ();
2024                                 types [i] = r.ReadId ();
2025                                 attrs [i] = r.ReadInt ();
2026                         }
2027                         return res;
2028                 }
2029
2030                 internal PropInfo[] Type_GetProperties (long id) {
2031                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_PROPERTIES, new PacketWriter ().WriteId (id));
2032
2033                         int n = r.ReadInt ();
2034                         PropInfo[] res = new PropInfo [n];
2035                         for (int i = 0; i < n; ++i) {
2036                                 res [i] = new PropInfo ();
2037                                 res [i].id = r.ReadId ();
2038                                 res [i].name = r.ReadString ();
2039                                 res [i].get_method = r.ReadId ();
2040                                 res [i].set_method = r.ReadId ();
2041                                 res [i].attrs = r.ReadInt ();
2042                         }
2043
2044                         return res;
2045                 }
2046
2047                 internal long Type_GetObject (long id) {
2048                         return SendReceive (CommandSet.TYPE, (int)CmdType.GET_OBJECT, new PacketWriter ().WriteId (id)).ReadId ();
2049                 }
2050
2051                 internal ValueImpl[] Type_GetValues (long id, long[] fields, long thread_id) {
2052                         int len = fields.Length;
2053                         PacketReader r;
2054                         if (thread_id != 0)
2055                                 r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_VALUES_2, new PacketWriter ().WriteId (id).WriteId (thread_id).WriteInt (len).WriteIds (fields));
2056                         else
2057                                 r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_VALUES, new PacketWriter ().WriteId (id).WriteInt (len).WriteIds (fields));
2058
2059                         ValueImpl[] res = new ValueImpl [len];
2060                         for (int i = 0; i < len; ++i)
2061                                 res [i] = r.ReadValue ();
2062                         return res;
2063                 }
2064
2065                 internal void Type_SetValues (long id, long[] fields, ValueImpl[] values) {
2066                         SendReceive (CommandSet.TYPE, (int)CmdType.SET_VALUES, new PacketWriter ().WriteId (id).WriteInt (fields.Length).WriteIds (fields).WriteValues (values));
2067                 }
2068
2069                 internal string[] Type_GetSourceFiles (long id, bool return_full_paths) {
2070                         var r = SendReceive (CommandSet.TYPE, return_full_paths ? (int)CmdType.GET_SOURCE_FILES_2 : (int)CmdType.GET_SOURCE_FILES, new PacketWriter ().WriteId (id));
2071                         int len = r.ReadInt ();
2072                         string[] res = new string [len];
2073                         for (int i = 0; i < len; ++i)
2074                                 res [i] = r.ReadString ();
2075                         return res;
2076                 }
2077
2078                 internal bool Type_IsAssignableFrom (long id, long c_id) {
2079                         return SendReceive (CommandSet.TYPE, (int)CmdType.IS_ASSIGNABLE_FROM, new PacketWriter ().WriteId (id).WriteId (c_id)).ReadByte () > 0;
2080                 }
2081
2082                 internal CattrInfo[] Type_GetCustomAttributes (long id, long attr_type_id, bool inherit) {
2083                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_CATTRS, new PacketWriter ().WriteId (id).WriteId (attr_type_id));
2084                         return ReadCattrs (r);
2085                 }
2086
2087                 internal CattrInfo[] Type_GetFieldCustomAttributes (long id, long field_id, long attr_type_id, bool inherit) {
2088                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_FIELD_CATTRS, new PacketWriter ().WriteId (id).WriteId (field_id).WriteId (attr_type_id));
2089                         return ReadCattrs (r);
2090                 }
2091
2092                 internal CattrInfo[] Type_GetPropertyCustomAttributes (long id, long field_id, long attr_type_id, bool inherit) {
2093                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_PROPERTY_CATTRS, new PacketWriter ().WriteId (id).WriteId (field_id).WriteId (attr_type_id));
2094                         return ReadCattrs (r);
2095                 }
2096
2097                 public long[] Type_GetMethodsByNameFlags (long id, string name, int flags, bool ignoreCase) {
2098                         flags |= ignoreCase ? (int)BindingFlagsExtensions.BINDING_FLAGS_IGNORE_CASE : 0;
2099                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.CMD_TYPE_GET_METHODS_BY_NAME_FLAGS, new PacketWriter ().WriteId (id).WriteString (name).WriteInt (flags));
2100                         int len = r.ReadInt ();
2101                         long[] res = new long [len];
2102                         for (int i = 0; i < len; ++i)
2103                                 res [i] = r.ReadId ();
2104                         return res;
2105                 }
2106
2107                 internal long[] Type_GetInterfaces (long id) {
2108                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_INTERFACES, new PacketWriter ().WriteId (id));
2109                         int len = r.ReadInt ();
2110                         return r.ReadIds (len);
2111                 }
2112
2113                 internal IfaceMapInfo[] Type_GetInterfaceMap (long id, long[] ids) {
2114                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.GET_INTERFACE_MAP, new PacketWriter ().WriteId (id).WriteInt (ids.Length).WriteIds (ids));
2115                         var res = new IfaceMapInfo [ids.Length];
2116                         for (int i = 0; i < ids.Length; ++i) {
2117                                 int n = r.ReadInt ();
2118
2119                                 res [i].iface_id = ids [i];
2120                                 res [i].iface_methods = r.ReadIds (n);
2121                                 res [i].target_methods = r.ReadIds (n);
2122                         }
2123
2124                         return res;
2125                 }
2126
2127                 internal bool Type_IsInitialized (long id) {
2128                         PacketReader r = SendReceive (CommandSet.TYPE, (int)CmdType.IS_INITIALIZED, new PacketWriter ().WriteId (id));
2129                         return r.ReadInt () == 1;
2130                 }
2131
2132                 /*
2133                  * EVENTS
2134                  */
2135
2136                 internal int EnableEvent (EventType etype, SuspendPolicy suspend_policy, List<Modifier> mods) {
2137                         var w = new PacketWriter ().WriteByte ((byte)etype).WriteByte ((byte)suspend_policy);
2138                         if (mods != null) {
2139                                 if (mods.Count > 255)
2140                                         throw new NotImplementedException ();
2141                                 w.WriteByte ((byte)mods.Count);
2142                                 foreach (Modifier mod in mods) {
2143                                         if (mod is CountModifier) {
2144                                                 w.WriteByte ((byte)ModifierKind.COUNT);
2145                                                 w.WriteInt ((mod as CountModifier).Count);
2146                                         } else if (mod is LocationModifier) {
2147                                                 w.WriteByte ((byte)ModifierKind.LOCATION_ONLY);
2148                                                 w.WriteId ((mod as LocationModifier).Method);
2149                                                 w.WriteLong ((mod as LocationModifier).Location);
2150                                         } else if (mod is StepModifier) {
2151                                                 w.WriteByte ((byte)ModifierKind.STEP);
2152                                                 w.WriteId ((mod as StepModifier).Thread);
2153                                                 w.WriteInt ((mod as StepModifier).Size);
2154                                                 w.WriteInt ((mod as StepModifier).Depth);
2155                                                 if (Version.AtLeast (2, 16))
2156                                                         w.WriteInt ((mod as StepModifier).Filter);
2157                                         } else if (mod is ThreadModifier) {
2158                                                 w.WriteByte ((byte)ModifierKind.THREAD_ONLY);
2159                                                 w.WriteId ((mod as ThreadModifier).Thread);
2160                                         } else if (mod is ExceptionModifier) {
2161                                                 var em = mod as ExceptionModifier;
2162                                                 w.WriteByte ((byte)ModifierKind.EXCEPTION_ONLY);
2163                                                 w.WriteId (em.Type);
2164                                                 if (Version.MajorVersion > 2 || Version.MinorVersion > 0) {
2165                                                         /* This is only supported in protocol version 2.1 */
2166                                                         w.WriteBool (em.Caught);
2167                                                         w.WriteBool (em.Uncaught);
2168                                                 } else if (!em.Caught || !em.Uncaught) {
2169                                                         throw new NotSupportedException ("This request is not supported by the protocol version implemented by the debuggee.");
2170                                                 }
2171                                         } else if (mod is AssemblyModifier) {
2172                                                 w.WriteByte ((byte)ModifierKind.ASSEMBLY_ONLY);
2173                                                 var amod = (mod as AssemblyModifier);
2174                                                 w.WriteInt (amod.Assemblies.Length);
2175                                                 foreach (var id in amod.Assemblies)
2176                                                         w.WriteId (id);
2177                                         } else if (mod is SourceFileModifier) {
2178                                                 w.WriteByte ((byte)ModifierKind.SOURCE_FILE_ONLY);
2179                                                 var smod = (mod as SourceFileModifier);
2180                                                 w.WriteInt (smod.SourceFiles.Length);
2181                                                 foreach (var s in smod.SourceFiles)
2182                                                         w.WriteString (s);
2183                                         } else if (mod is TypeNameModifier) {
2184                                                 w.WriteByte ((byte)ModifierKind.TYPE_NAME_ONLY);
2185                                                 var tmod = (mod as TypeNameModifier);
2186                                                 w.WriteInt (tmod.TypeNames.Length);
2187                                                 foreach (var s in tmod.TypeNames)
2188                                                         w.WriteString (s);
2189                                         } else {
2190                                                 throw new NotImplementedException ();
2191                                         }
2192                                 }
2193                         } else {
2194                                 w.WriteByte (0);
2195                         }
2196                         return SendReceive (CommandSet.EVENT_REQUEST, (int)CmdEventRequest.SET, w).ReadInt ();
2197                 }
2198
2199                 internal void ClearEventRequest (EventType etype, int req_id) {
2200                         SendReceive (CommandSet.EVENT_REQUEST, (int)CmdEventRequest.CLEAR, new PacketWriter ().WriteByte ((byte)etype).WriteInt (req_id));
2201                 }
2202
2203                 internal void ClearAllBreakpoints () {
2204                         SendReceive (CommandSet.EVENT_REQUEST, (int)CmdEventRequest.CLEAR_ALL_BREAKPOINTS, new PacketWriter ());
2205                 }
2206
2207                 /*
2208                  * STACK FRAME
2209                  */
2210                 internal ValueImpl StackFrame_GetThis (long thread_id, long id) {
2211                         PacketReader r = SendReceive (CommandSet.STACK_FRAME, (int)CmdStackFrame.GET_THIS, new PacketWriter ().WriteId (thread_id).WriteId (id));
2212                         return r.ReadValue ();
2213                 }
2214
2215                 internal ValueImpl[] StackFrame_GetValues (long thread_id, long id, int[] pos) {
2216                         /* pos < 0 -> argument at pos (-pos) - 1 */
2217                         /* pos >= 0 -> local at pos */
2218                         int len = pos.Length;
2219                         PacketReader r = SendReceive (CommandSet.STACK_FRAME, (int)CmdStackFrame.GET_VALUES, new PacketWriter ().WriteId (thread_id).WriteId (id).WriteInt (len).WriteInts (pos));
2220
2221                         ValueImpl[] res = new ValueImpl [len];
2222                         for (int i = 0; i < len; ++i)
2223                                 res [i] = r.ReadValue ();
2224                         return res;
2225                 }
2226
2227                 internal void StackFrame_SetValues (long thread_id, long id, int[] pos, ValueImpl[] values) {
2228                         /* pos < 0 -> argument at pos (-pos) - 1 */
2229                         /* pos >= 0 -> local at pos */
2230                         int len = pos.Length;
2231                         SendReceive (CommandSet.STACK_FRAME, (int)CmdStackFrame.SET_VALUES, new PacketWriter ().WriteId (thread_id).WriteId (id).WriteInt (len).WriteInts (pos).WriteValues (values));
2232                 }
2233
2234                 /*
2235                  * ARRAYS
2236                  */
2237                 internal int[] Array_GetLength (long id, out int rank, out int[] lower_bounds) {
2238                         var r = SendReceive (CommandSet.ARRAY_REF, (int)CmdArrayRef.GET_LENGTH, new PacketWriter ().WriteId (id));
2239                         rank = r.ReadInt ();
2240                         int[] res = new int [rank];
2241                         lower_bounds = new int [rank];
2242                         for (int i = 0; i < rank; ++i) {
2243                                 res [i] = r.ReadInt ();
2244                                 lower_bounds [i] = r.ReadInt ();
2245                         }
2246                         return res;
2247                 }
2248
2249                 internal ValueImpl[] Array_GetValues (long id, int index, int len) {
2250                         var r = SendReceive (CommandSet.ARRAY_REF, (int)CmdArrayRef.GET_VALUES, new PacketWriter ().WriteId (id).WriteInt (index).WriteInt (len));
2251                         ValueImpl[] res = new ValueImpl [len];
2252                         for (int i = 0; i < len; ++i)
2253                                 res [i] = r.ReadValue ();
2254                         return res;
2255                 }
2256
2257                 internal void Array_SetValues (long id, int index, ValueImpl[] values) {
2258                         SendReceive (CommandSet.ARRAY_REF, (int)CmdArrayRef.SET_VALUES, new PacketWriter ().WriteId (id).WriteInt (index).WriteInt (values.Length).WriteValues (values));
2259                 }
2260
2261                 /*
2262                  * STRINGS
2263                  */
2264                 internal string String_GetValue (long id) {
2265                         return SendReceive (CommandSet.STRING_REF, (int)CmdStringRef.GET_VALUE, new PacketWriter ().WriteId (id)).ReadString ();
2266                 }
2267
2268                 internal int String_GetLength (long id) {
2269                         return (int)SendReceive (CommandSet.STRING_REF, (int)CmdStringRef.GET_LENGTH, new PacketWriter ().WriteId (id)).ReadLong ();
2270                 }
2271
2272                 internal char[] String_GetChars (long id, int index, int length) {
2273                         var r = SendReceive (CommandSet.STRING_REF, (int)CmdStringRef.GET_CHARS, new PacketWriter ().WriteId (id).WriteLong (index).WriteLong (length));
2274                         var res = new char [length];
2275                         for (int i = 0; i < length; ++i)
2276                                 res [i] = (char)r.ReadShort ();
2277                         return res;
2278                 }
2279
2280                 /*
2281                  * OBJECTS
2282                  */
2283                 internal long Object_GetType (long id) {
2284                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_TYPE, new PacketWriter ().WriteId (id)).ReadId ();
2285                 }
2286
2287                 internal long Object_GetDomain (long id) {
2288                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_DOMAIN, new PacketWriter ().WriteId (id)).ReadId ();
2289                 }
2290
2291                 internal ValueImpl[] Object_GetValues (long id, long[] fields) {
2292                         int len = fields.Length;
2293                         PacketReader r = SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_VALUES, new PacketWriter ().WriteId (id).WriteInt (len).WriteIds (fields));
2294
2295                         ValueImpl[] res = new ValueImpl [len];
2296                         for (int i = 0; i < len; ++i)
2297                                 res [i] = r.ReadValue ();
2298                         return res;
2299                 }
2300
2301                 internal void Object_SetValues (long id, long[] fields, ValueImpl[] values) {
2302                         SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.SET_VALUES, new PacketWriter ().WriteId (id).WriteInt (fields.Length).WriteIds (fields).WriteValues (values));
2303                 }
2304
2305                 internal bool Object_IsCollected (long id) {
2306                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.IS_COLLECTED, new PacketWriter ().WriteId (id)).ReadInt () == 1;
2307                 }
2308
2309                 internal long Object_GetAddress (long id) {
2310                         return SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_ADDRESS, new PacketWriter ().WriteId (id)).ReadLong ();
2311                 }
2312
2313                 internal ObjectRefInfo Object_GetInfo (long id) {
2314                         ObjectRefInfo res = new ObjectRefInfo ();
2315                         PacketReader r = SendReceive (CommandSet.OBJECT_REF, (int)CmdObjectRef.GET_INFO, new PacketWriter ().WriteId (id));
2316
2317                         res.type_id = r.ReadId ();
2318                         res.domain_id = r.ReadId ();
2319                         return res;
2320                 }
2321
2322                 public void ForceDisconnect ()
2323                 {
2324                         TransportClose ();
2325                 }
2326         }
2327
2328         class TcpConnection : Connection
2329         {
2330                 Socket socket;
2331
2332                 internal TcpConnection (Socket socket)
2333                 {
2334                         this.socket = socket;
2335                         //socket.SetSocketOption (SocketOptionLevel.IP, SocketOptionName.NoDelay, 1);
2336                 }
2337
2338                 internal EndPoint EndPoint {
2339                         get {
2340                                 return socket.RemoteEndPoint;
2341                         }
2342                 }
2343
2344                 protected override int TransportSend (byte[] buf, int buf_offset, int len)
2345                 {
2346                         return socket.Send (buf, buf_offset, len, SocketFlags.None);
2347                 }
2348
2349                 protected override int TransportReceive (byte[] buf, int buf_offset, int len)
2350                 {
2351                         return socket.Receive (buf, buf_offset, len, SocketFlags.None);
2352                 }
2353
2354                 protected override void TransportSetTimeouts (int send_timeout, int receive_timeout)
2355                 {
2356                         socket.SendTimeout = send_timeout;
2357                         socket.ReceiveTimeout = receive_timeout;
2358                 }
2359
2360                 protected override void TransportClose ()
2361                 {
2362                         socket.Close ();
2363                 }
2364         }
2365
2366         /* This is the interface exposed by the debugger towards the debugger agent */
2367         interface IEventHandler
2368         {
2369                 void Events (SuspendPolicy suspend_policy, EventInfo[] events);
2370
2371                 void VMDisconnect (int req_id, long thread_id, string vm_uri);
2372         }
2373 }