Exemplo n.º 1
0
        private void ReadCustomMetadata(BitAccess bits)
        {
            int  savedPosition = bits.Position;
            byte version;

            bits.ReadUInt8(out version);
            if (version != 4)
            {
                throw new PdbDebugException("Unknown custom metadata item version: {0}", version);
            }
            byte kind;

            bits.ReadUInt8(out kind);
            bits.Align(4);
            uint numberOfBytesInItem;

            bits.ReadUInt32(out numberOfBytesInItem);
            switch (kind)
            {
            case 0: this.ReadUsingInfo(bits); break;

            case 1: break;     // this.ReadForwardInfo(bits); break;

            case 2: break;     // this.ReadForwardedToModuleInfo(bits); break;

            case 3: this.ReadIteratorLocals(bits); break;

            case 4: this.ReadForwardIterator(bits); break;

            default: throw new PdbDebugException("Unknown custom metadata item kind: {0}", kind);
            }
            bits.Position = savedPosition + (int)numberOfBytesInItem;
        }
Exemplo n.º 2
0
 internal DbiModuleInfo(BitAccess bits, bool readStrings)
 {
     bits.ReadInt32(out opened);
     new DbiSecCon(bits);
     bits.ReadUInt16(out flags);
     bits.ReadInt16(out stream);
     bits.ReadInt32(out cbSyms);
     bits.ReadInt32(out cbOldLines);
     bits.ReadInt32(out cbLines);
     bits.ReadInt16(out files);
     bits.ReadInt16(out pad1);
     bits.ReadUInt32(out offsets);
     bits.ReadInt32(out niSource);
     bits.ReadInt32(out niCompiler);
     if (readStrings)
     {
         bits.ReadCString(out moduleName);
         bits.ReadCString(out objectName);
     }
     else
     {
         bits.SkipCString(out moduleName);
         bits.SkipCString(out objectName);
     }
     bits.Align(4);
     //if (opened != 0 || pad1 != 0) {
     //  throw new PdbException("Invalid DBI module. "+
     //                                 "(opened={0}, pad={1})", opened, pad1);
     //}
 }
Exemplo n.º 3
0
 internal DbiModuleInfo(BitAccess bits, bool readStrings)
 {
     bits.ReadInt32(out opened);
     new DbiSecCon(bits);
     bits.ReadUInt16(out flags);
     bits.ReadInt16(out stream);
     bits.ReadInt32(out cbSyms);
     bits.ReadInt32(out cbOldLines);
     bits.ReadInt32(out cbLines);
     bits.ReadInt16(out files);
     bits.ReadInt16(out pad1);
     bits.ReadUInt32(out offsets);
     bits.ReadInt32(out niSource);
     bits.ReadInt32(out niCompiler);
     if (readStrings)
     {
         bits.ReadCString(out moduleName);
         bits.ReadCString(out objectName);
     }
     else
     {
         bits.SkipCString(out moduleName);
         bits.SkipCString(out objectName);
     }
     bits.Align(4);
     //if (opened != 0 || pad1 != 0) {
     //  throw new PdbException("Invalid DBI module. "+
     //                                 "(opened={0}, pad={1})", opened, pad1);
     //}
 }
Exemplo n.º 4
0
        internal DbiModuleInfo(BitAccess bits, bool readStrings)
        {
            bits.ReadInt32(out opened);
            new DbiSecCon(bits);
            bits.ReadUInt16(out flags);
            bits.ReadInt16(out stream);
            bits.ReadInt32(out cbSyms);
            bits.ReadInt32(out cbOldLines);
            bits.ReadInt32(out cbLines);
            bits.ReadInt16(out files);
            bits.ReadInt16(out pad1);
            bits.ReadUInt32(out offsets);
            bits.ReadInt32(out niSource);
            bits.ReadInt32(out niCompiler);
            if (readStrings)
            {
                bits.ReadCString(out moduleName);
                bits.ReadCString(out objectName);
            }
            else
            {
                bits.SkipCString(out moduleName);
                bits.SkipCString(out objectName);
            }

            bits.Align(4);
        }
Exemplo n.º 5
0
        private static void LoadManagedLines(
            PdbFunction[] funcs,
            Dictionary <int, string> names,
            BitAccess bits,
            MsfDirectory dir,
            Dictionary <string, int> nameIndex,
            PdbStreamHelper reader,
            uint limit,
            Dictionary <string, PdbSource> sources)
        {
            Array.Sort(funcs, PdbFunction.byAddressAndToken);

            Dictionary <int, PdbSource> checks = new Dictionary <int, PdbSource>();

            // Read the files first
            int begin = bits.Position;

            while (bits.Position < limit)
            {
                int sig;
                int siz;
                bits.ReadInt32(out sig);
                bits.ReadInt32(out siz);
                int place  = bits.Position;
                int endSym = bits.Position + siz;

                switch ((DEBUG_S_SUBSECTION)sig)
                {
                case DEBUG_S_SUBSECTION.FILECHKSMS:
                    while (bits.Position < endSym)
                    {
                        CV_FileCheckSum chk;

                        int ni = bits.Position - place;
                        bits.ReadUInt32(out chk.name);
                        bits.ReadUInt8(out chk.len);
                        bits.ReadUInt8(out chk.type);

                        string    name = names[(int)chk.name];
                        PdbSource src;
                        if (!sources.TryGetValue(name.ToUpperInvariant(), out src))
                        {
                            int    guidStream;
                            Guid   doctypeGuid  = Guid.Empty;
                            Guid   languageGuid = Guid.Empty;
                            Guid   vendorGuid   = Guid.Empty;
                            Guid   algorithmId  = Guid.Empty;
                            byte[] checksum     = null;
                            byte[] source       = null;

                            if (nameIndex.TryGetValue("/SRC/FILES/" + name.ToUpperInvariant(), out guidStream))
                            {
                                BitAccess guidBits = new BitAccess(0x100);
                                dir._streams[guidStream].Read(reader, guidBits);
                                LoadGuidStream(guidBits, out doctypeGuid, out languageGuid, out vendorGuid, out algorithmId, out checksum, out source);
                            }

                            src = new PdbSource(/*(uint)ni,*/ name, doctypeGuid, languageGuid, vendorGuid, algorithmId, checksum, source);
                            sources.Add(name.ToUpperInvariant(), src);
                        }

                        checks.Add(ni, src);
                        bits.Position += chk.len;
                        bits.Align(4);
                    }

                    bits.Position = endSym;
                    break;

                default:
                    bits.Position = endSym;
                    break;
                }
            }

            // Read the lines next.
            bits.Position = begin;
            while (bits.Position < limit)
            {
                int sig;
                int siz;
                bits.ReadInt32(out sig);
                bits.ReadInt32(out siz);
                int endSym = bits.Position + siz;

                switch ((DEBUG_S_SUBSECTION)sig)
                {
                case DEBUG_S_SUBSECTION.LINES:
                {
                    CV_LineSection sec;

                    bits.ReadUInt32(out sec.off);
                    bits.ReadUInt16(out sec.sec);
                    bits.ReadUInt16(out sec.flags);
                    bits.ReadUInt32(out sec.cod);
                    int funcIndex = FindFunction(funcs, sec.sec, sec.off);
                    if (funcIndex < 0)
                    {
                        break;
                    }

                    PdbFunction func = funcs[funcIndex];
                    if (func.SequencePoints == null)
                    {
                        while (funcIndex > 0)
                        {
                            PdbFunction f = funcs[funcIndex - 1];
                            if (f.SequencePoints != null || f.Segment != sec.sec || f.Address != sec.off)
                            {
                                break;
                            }

                            func = f;
                            funcIndex--;
                        }
                    }
                    else
                    {
                        while (funcIndex < funcs.Length - 1 && func.SequencePoints != null)
                        {
                            PdbFunction f = funcs[funcIndex + 1];
                            if (f.Segment != sec.sec || f.Address != sec.off)
                            {
                                break;
                            }

                            func = f;
                            funcIndex++;
                        }
                    }

                    if (func.SequencePoints != null)
                    {
                        break;
                    }

                    // Count the line blocks.
                    int begSym = bits.Position;
                    int blocks = 0;
                    while (bits.Position < endSym)
                    {
                        CV_SourceFile file;
                        bits.ReadUInt32(out file.index);
                        bits.ReadUInt32(out file.count);
                        bits.ReadUInt32(out file.linsiz);     // Size of payload.
                        int linsiz = (int)file.count * (8 + ((sec.flags & 1) != 0 ? 4 : 0));
                        bits.Position += linsiz;
                        blocks++;
                    }

                    func.SequencePoints = new PdbSequencePointCollection[blocks];
                    int block = 0;

                    bits.Position = begSym;
                    while (bits.Position < endSym)
                    {
                        CV_SourceFile file;
                        bits.ReadUInt32(out file.index);
                        bits.ReadUInt32(out file.count);
                        bits.ReadUInt32(out file.linsiz);     // Size of payload.

                        PdbSource src = checks[(int)file.index];
                        PdbSequencePointCollection tmp = new PdbSequencePointCollection(src, file.count);
                        func.SequencePoints[block++] = tmp;
                        PdbSequencePoint[] lines = tmp.Lines;

                        int plin = bits.Position;
                        int pcol = bits.Position + 8 * (int)file.count;

                        for (int i = 0; i < file.count; i++)
                        {
                            CV_Line   line;
                            CV_Column column = new CV_Column();

                            bits.Position = plin + 8 * i;
                            bits.ReadUInt32(out line.offset);
                            bits.ReadUInt32(out line.flags);

                            uint lineBegin = line.flags & (uint)CV_Line_Flags.linenumStart;
                            uint delta     = (line.flags & (uint)CV_Line_Flags.deltaLineEnd) >> 24;
                            //bool statement = ((line.flags & (uint)CV_Line_Flags.fStatement) == 0);
                            if ((sec.flags & 1) != 0)
                            {
                                bits.Position = pcol + 4 * i;
                                bits.ReadUInt16(out column.offColumnStart);
                                bits.ReadUInt16(out column.offColumnEnd);
                            }

                            lines[i] = new PdbSequencePoint(
                                line.offset,
                                lineBegin,
                                column.offColumnStart,
                                lineBegin + delta,
                                column.offColumnEnd);
                        }
                    }

                    break;
                }
                }

                bits.Position = endSym;
            }
        }
Exemplo n.º 6
0
        internal PdbFunction(/*string module, */ ManProcSym proc, BitAccess bits)
        {
            Token = proc.token;
            //this.module = module;
            //this.name = proc.name;
            //this.flags = proc.flags;
            Segment = proc.seg;
            Address = proc.off;
            //this.length = proc.len;

            if (proc.seg != 1)
            {
                throw new PdbDebugException("Segment is {0}, not 1.", proc.seg);
            }

            if (proc.parent != 0 || proc.next != 0)
            {
                throw new PdbDebugException(
                          "Warning parent={0}, next={1}",
                          proc.parent,
                          proc.next);
            }
            //if (proc.dbgStart != 0 || proc.dbgEnd != 0) {
            //  throw new PdbDebugException("Warning DBG start={0}, end={1}",
            //                              proc.dbgStart, proc.dbgEnd);
            //}

            int constantCount;
            int scopeCount;
            int slotCount;
            int usedNamespacesCount;

            CountScopesAndSlots(bits, proc.end, out constantCount, out scopeCount, out slotCount, out usedNamespacesCount);
            int scope    = constantCount > 0 || slotCount > 0 || usedNamespacesCount > 0 ? 1 : 0;
            int slot     = 0;
            int constant = 0;
            int usedNs   = 0;

            Scopes     = new PdbScope[scopeCount + scope];
            Slots      = new PdbSlot[slotCount];
            Constants  = new PdbConstant[constantCount];
            Namespaces = new string[usedNamespacesCount];

            if (scope > 0)
            {
                Scopes[0] = new PdbScope(Address, proc.len, Slots, Constants, Namespaces);
            }

            while (bits.Position < proc.end)
            {
                ushort siz;
                ushort rec;

                bits.ReadUInt16(out siz);
                int star = bits.Position;
                int stop = bits.Position + siz;
                bits.Position = star;
                bits.ReadUInt16(out rec);

                switch ((SYM)rec)
                {
                case SYM.S_OEM:
                {
                    // 0x0404
                    OemSymbol oem;

                    bits.ReadGuid(out oem.idOem);
                    bits.ReadUInt32(out oem.typind);
                    // internal byte[]   rgl;        // user data, force 4-byte alignment

                    if (oem.idOem == msilMetaData)
                    {
                        string name = bits.ReadString();
                        if (name == "MD2")
                        {
                            byte version;
                            bits.ReadUInt8(out version);
                            if (version == 4)
                            {
                                byte count;
                                bits.ReadUInt8(out count);
                                bits.Align(4);
                                unchecked
                                {
                                    while (count-- > 0)
                                    {
                                        ReadCustomMetadata(bits);
                                    }
                                }
                            }
                        }

                        bits.Position = stop;
                        break;
                    }

                    throw new PdbDebugException(
                              "OEM section: guid={0} ti={1}",
                              oem.idOem,
                              oem.typind);

                    // bits.Position = stop;
                }

                case SYM.S_BLOCK32:
                {
                    BlockSym32 block = new BlockSym32();

                    bits.ReadUInt32(out block.parent);
                    bits.ReadUInt32(out block.end);
                    bits.ReadUInt32(out block.len);
                    bits.ReadUInt32(out block.off);
                    bits.ReadUInt16(out block.seg);
                    bits.SkipCString(out block.name);
                    bits.Position = stop;

                    Scopes[scope++] = new PdbScope(Address, block, bits, out slotToken);
                    bits.Position   = (int)block.end;
                    break;
                }

                case SYM.S_MANSLOT:
                    uint typind;
                    Slots[slot++] = new PdbSlot(bits, out typind);
                    bits.Position = stop;
                    break;

                case SYM.S_MANCONSTANT:
                    Constants[constant++] = new PdbConstant(bits);
                    bits.Position         = stop;
                    break;

                case SYM.S_UNAMESPACE:
                    bits.ReadCString(out Namespaces[usedNs++]);
                    bits.Position = stop;
                    break;

                case SYM.S_END:
                    bits.Position = stop;
                    break;

                default:
                {
                    //throw new PdbDebugException("Unknown SYM: {0}", (SYM)rec);
                    bits.Position = stop;
                    break;
                }
                }
            }

            if (bits.Position != proc.end)
            {
                throw new PdbDebugException("Not at S_END");
            }

            ushort esiz;
            ushort erec;

            bits.ReadUInt16(out esiz);
            bits.ReadUInt16(out erec);

            if (erec != (ushort)SYM.S_END)
            {
                throw new PdbDebugException("Missing S_END");
            }
        }
Exemplo n.º 7
0
        private static void LoadManagedLines(PdbFunction[] funcs,
                                     Dictionary<int, string> names,
                                     BitAccess bits,
                                     MsfDirectory dir,
                                     Dictionary<string, int> nameIndex,
                                     PdbStreamHelper reader,
                                     uint limit,
                                     Dictionary<string, PdbSource> sources)
        {
            Array.Sort(funcs, PdbFunction.byAddressAndToken);

            Dictionary<int, PdbSource> checks = new Dictionary<int, PdbSource>();

            // Read the files first
            int begin = bits.Position;
            while (bits.Position < limit)
            {
                int sig;
                int siz;
                bits.ReadInt32(out sig);
                bits.ReadInt32(out siz);
                int place = bits.Position;
                int endSym = bits.Position + siz;

                switch ((DEBUG_S_SUBSECTION)sig)
                {
                    case DEBUG_S_SUBSECTION.FILECHKSMS:
                        while (bits.Position < endSym)
                        {
                            CV_FileCheckSum chk;

                            int ni = bits.Position - place;
                            bits.ReadUInt32(out chk.name);
                            bits.ReadUInt8(out chk.len);
                            bits.ReadUInt8(out chk.type);

                            string name = names[(int)chk.name];
                            PdbSource src;
                            if (!sources.TryGetValue(name.ToUpperInvariant(), out src))
                            {
                                int guidStream;
                                Guid doctypeGuid = Guid.Empty;
                                Guid languageGuid = Guid.Empty;
                                Guid vendorGuid = Guid.Empty;
                                Guid algorithmId = Guid.Empty;
                                byte[] checksum = null;
                                byte[] source = null;

                                if (nameIndex.TryGetValue("/SRC/FILES/" + name.ToUpperInvariant(), out guidStream))
                                {
                                    var guidBits = new BitAccess(0x100);
                                    dir._streams[guidStream].Read(reader, guidBits);
                                    LoadGuidStream(guidBits, out doctypeGuid, out languageGuid, out vendorGuid, out algorithmId, out checksum, out source);
                                }

                                src = new PdbSource(/*(uint)ni,*/ name, doctypeGuid, languageGuid, vendorGuid, algorithmId, checksum, source);
                                sources.Add(name.ToUpperInvariant(), src);
                            }
                            checks.Add(ni, src);
                            bits.Position += chk.len;
                            bits.Align(4);
                        }
                        bits.Position = endSym;
                        break;

                    default:
                        bits.Position = endSym;
                        break;
                }
            }

            // Read the lines next.
            bits.Position = begin;
            while (bits.Position < limit)
            {
                int sig;
                int siz;
                bits.ReadInt32(out sig);
                bits.ReadInt32(out siz);
                int endSym = bits.Position + siz;

                switch ((DEBUG_S_SUBSECTION)sig)
                {
                    case DEBUG_S_SUBSECTION.LINES:
                        {
                            CV_LineSection sec;

                            bits.ReadUInt32(out sec.off);
                            bits.ReadUInt16(out sec.sec);
                            bits.ReadUInt16(out sec.flags);
                            bits.ReadUInt32(out sec.cod);
                            int funcIndex = FindFunction(funcs, sec.sec, sec.off);
                            if (funcIndex < 0) break;
                            var func = funcs[funcIndex];
                            if (func.SequencePoints == null)
                            {
                                while (funcIndex > 0)
                                {
                                    var f = funcs[funcIndex - 1];
                                    if (f.SequencePoints != null || f.Segment != sec.sec || f.Address != sec.off) break;
                                    func = f;
                                    funcIndex--;
                                }
                            }
                            else
                            {
                                while (funcIndex < funcs.Length - 1 && func.SequencePoints != null)
                                {
                                    var f = funcs[funcIndex + 1];
                                    if (f.Segment != sec.sec || f.Address != sec.off) break;
                                    func = f;
                                    funcIndex++;
                                }
                            }
                            if (func.SequencePoints != null) break;

                            // Count the line blocks.
                            int begSym = bits.Position;
                            int blocks = 0;
                            while (bits.Position < endSym)
                            {
                                CV_SourceFile file;
                                bits.ReadUInt32(out file.index);
                                bits.ReadUInt32(out file.count);
                                bits.ReadUInt32(out file.linsiz);   // Size of payload.
                                int linsiz = (int)file.count * (8 + ((sec.flags & 1) != 0 ? 4 : 0));
                                bits.Position += linsiz;
                                blocks++;
                            }

                            func.SequencePoints = new PdbSequencePointCollection[blocks];
                            int block = 0;

                            bits.Position = begSym;
                            while (bits.Position < endSym)
                            {
                                CV_SourceFile file;
                                bits.ReadUInt32(out file.index);
                                bits.ReadUInt32(out file.count);
                                bits.ReadUInt32(out file.linsiz);   // Size of payload.

                                PdbSource src = (PdbSource)checks[(int)file.index];
                                PdbSequencePointCollection tmp = new PdbSequencePointCollection(src, file.count);
                                func.SequencePoints[block++] = tmp;
                                PdbSequencePoint[] lines = tmp.Lines;

                                int plin = bits.Position;
                                int pcol = bits.Position + 8 * (int)file.count;

                                for (int i = 0; i < file.count; i++)
                                {
                                    CV_Line line;
                                    CV_Column column = new CV_Column();

                                    bits.Position = plin + 8 * i;
                                    bits.ReadUInt32(out line.offset);
                                    bits.ReadUInt32(out line.flags);

                                    uint lineBegin = line.flags & (uint)CV_Line_Flags.linenumStart;
                                    uint delta = (line.flags & (uint)CV_Line_Flags.deltaLineEnd) >> 24;
                                    //bool statement = ((line.flags & (uint)CV_Line_Flags.fStatement) == 0);
                                    if ((sec.flags & 1) != 0)
                                    {
                                        bits.Position = pcol + 4 * i;
                                        bits.ReadUInt16(out column.offColumnStart);
                                        bits.ReadUInt16(out column.offColumnEnd);
                                    }

                                    lines[i] = new PdbSequencePoint(line.offset,
                                                           lineBegin,
                                                           column.offColumnStart,
                                                           lineBegin + delta,
                                                           column.offColumnEnd);
                                }
                            }
                            break;
                        }
                }
                bits.Position = endSym;
            }
        }
Exemplo n.º 8
0
 private void ReadCustomMetadata(BitAccess bits)
 {
     int savedPosition = bits.Position;
     byte version;
     bits.ReadUInt8(out version);
     if (version != 4)
     {
         throw new PdbDebugException("Unknown custom metadata item version: {0}", version);
     }
     byte kind;
     bits.ReadUInt8(out kind);
     bits.Align(4);
     uint numberOfBytesInItem;
     bits.ReadUInt32(out numberOfBytesInItem);
     switch (kind)
     {
         case 0: this.ReadUsingInfo(bits); break;
         case 1: break; // this.ReadForwardInfo(bits); break;
         case 2: break; // this.ReadForwardedToModuleInfo(bits); break;
         case 3: this.ReadIteratorLocals(bits); break;
         case 4: this.ReadForwardIterator(bits); break;
         default: throw new PdbDebugException("Unknown custom metadata item kind: {0}", kind);
     }
     bits.Position = savedPosition + (int)numberOfBytesInItem;
 }
Exemplo n.º 9
0
        internal PdbFunction(/*string module, */ManProcSym proc, BitAccess bits)
        {
            this.Token = proc.token;
            //this.module = module;
            //this.name = proc.name;
            //this.flags = proc.flags;
            this.Segment = proc.seg;
            this.Address = proc.off;
            //this.length = proc.len;

            if (proc.seg != 1)
            {
                throw new PdbDebugException("Segment is {0}, not 1.", proc.seg);
            }
            if (proc.parent != 0 || proc.next != 0)
            {
                throw new PdbDebugException("Warning parent={0}, next={1}",
                                            proc.parent, proc.next);
            }
            //if (proc.dbgStart != 0 || proc.dbgEnd != 0) {
            //  throw new PdbDebugException("Warning DBG start={0}, end={1}",
            //                              proc.dbgStart, proc.dbgEnd);
            //}

            int constantCount;
            int scopeCount;
            int slotCount;
            int usedNamespacesCount;
            CountScopesAndSlots(bits, proc.end, out constantCount, out scopeCount, out slotCount, out usedNamespacesCount);
            int scope = constantCount > 0 || slotCount > 0 || usedNamespacesCount > 0 ? 1 : 0;
            int slot = 0;
            int constant = 0;
            int usedNs = 0;
            Scopes = new PdbScope[scopeCount + scope];
            Slots = new PdbSlot[slotCount];
            Constants = new PdbConstant[constantCount];
            Namespaces = new string[usedNamespacesCount];

            if (scope > 0)
                Scopes[0] = new PdbScope(this.Address, proc.len, Slots, Constants, Namespaces);

            while (bits.Position < proc.end)
            {
                ushort siz;
                ushort rec;

                bits.ReadUInt16(out siz);
                int star = bits.Position;
                int stop = bits.Position + siz;
                bits.Position = star;
                bits.ReadUInt16(out rec);

                switch ((SYM)rec)
                {
                    case SYM.S_OEM:
                        {          // 0x0404
                            OemSymbol oem;

                            bits.ReadGuid(out oem.idOem);
                            bits.ReadUInt32(out oem.typind);
                            // internal byte[]   rgl;        // user data, force 4-byte alignment

                            if (oem.idOem == msilMetaData)
                            {
                                string name = bits.ReadString();
                                if (name == "MD2")
                                {
                                    byte version;
                                    bits.ReadUInt8(out version);
                                    if (version == 4)
                                    {
                                        byte count;
                                        bits.ReadUInt8(out count);
                                        bits.Align(4);
                                        while (count-- > 0)
                                            this.ReadCustomMetadata(bits);
                                    }
                                }
                                bits.Position = stop;
                                break;
                            }
                            else
                            {
                                throw new PdbDebugException("OEM section: guid={0} ti={1}",
                                                            oem.idOem, oem.typind);
                                // bits.Position = stop;
                            }
                        }

                    case SYM.S_BLOCK32:
                        {
                            BlockSym32 block = new BlockSym32();

                            bits.ReadUInt32(out block.parent);
                            bits.ReadUInt32(out block.end);
                            bits.ReadUInt32(out block.len);
                            bits.ReadUInt32(out block.off);
                            bits.ReadUInt16(out block.seg);
                            bits.SkipCString(out block.name);
                            bits.Position = stop;

                            Scopes[scope++] = new PdbScope(this.Address, block, bits, out slotToken);
                            bits.Position = (int)block.end;
                            break;
                        }

                    case SYM.S_MANSLOT:
                        uint typind;
                        Slots[slot++] = new PdbSlot(bits, out typind);
                        bits.Position = stop;
                        break;

                    case SYM.S_MANCONSTANT:
                        Constants[constant++] = new PdbConstant(bits);
                        bits.Position = stop;
                        break;

                    case SYM.S_UNAMESPACE:
                        bits.ReadCString(out Namespaces[usedNs++]);
                        bits.Position = stop;
                        break;

                    case SYM.S_END:
                        bits.Position = stop;
                        break;

                    default:
                        {
                            //throw new PdbDebugException("Unknown SYM: {0}", (SYM)rec);
                            bits.Position = stop;
                            break;
                        }
                }
            }

            if (bits.Position != proc.end)
            {
                throw new PdbDebugException("Not at S_END");
            }

            ushort esiz;
            ushort erec;
            bits.ReadUInt16(out esiz);
            bits.ReadUInt16(out erec);

            if (erec != (ushort)SYM.S_END)
            {
                throw new PdbDebugException("Missing S_END");
            }
        }