private PDBType DetectPdbType()
{
int maxSize = Math.Max(SMALL_MAGIC.Length, BIG_MAGIC.Length);
byte[] magic;
using (var span = new MemoryMappedSpan(mf, fs.Length)) {
magic = span.GetSpan().Slice(0, maxSize).ToArray();
}
string msfMagic = Encoding.ASCII.GetString(magic);
if (msfMagic.StartsWith(BIG_MAGIC))
{
return(PDBType.Big);
}
else if (msfMagic.StartsWith(SMALL_MAGIC))
{
return(PDBType.Small);
}
else
{
throw new InvalidDataException("No valid MSF header found");
}
}
public MSFReader(MemoryMappedFile mfile, long length)
{
this.mf = new MemoryMappedSpan(mfile, length);
this.Header = ReadHeader();
}
public PDBFile(FileStream stream)
{
this.fs = stream;
this.mf = MemoryMappedFile.CreateFromFile(stream, null, 0, MemoryMappedFileAccess.Read, HandleInheritability.Inheritable, true);
this.memSpan = new MemoryMappedSpan <byte>(mf, (int)fs.Length);
this.StreamTable = Services.GetService <StreamTableReader>();
Services.AddService <PDBFile>(this);
this.Type = MSFReader.DetectPdbType(memSpan.GetSpan());
MSFReader msf = null;
StreamTableReader streamTable = null;
if (Type != PDBType.Old)
{
switch (Type)
{
case PDBType.Big:
msf = new MSFReaderDS(memSpan.Memory);
break;
case PDBType.Small:
msf = new MSFReaderJG(memSpan.Memory);
break;
default:
throw new InvalidOperationException();
}
Services.AddService <MSFReader>(msf);
// init stream table
{
byte[] streamTableData = msf.StreamTable();
streamTable = new StreamTableReader(Services, streamTableData);
}
Services.AddService <StreamTableReader>(streamTable);
DBIReader dbi;
// init DBI
{
byte[] dbiData = streamTable.GetStream(DefaultStreams.DBI);
dbi = new DBIReader(Services, dbiData);
OnDbiInit?.Invoke(dbi);
}
Services.AddService <DBIReader>(dbi);
}
TPIReader tpi;
// init TPI
{
SpanStream tpiStream;
if (Type != PDBType.Old)
{
byte[] tpiData = streamTable.GetStream(DefaultStreams.TPI);
tpiStream = new SpanStream(tpiData);
}
else
{
Span <byte> span = memSpan.GetSpan();
JGHeaderOld header = span.Read <JGHeaderOld>(0);
// $TODO: the MSFReader interface should be abstracted into a more generic PDBHeader
Services.AddService <JGHeaderOld>(header);
tpiStream = new SpanStream(span.Slice(header.SIZE).ToArray());
}
tpi = new TPIReader(Services, tpiStream);
OnTpiInit?.Invoke(tpi);
}
Services.AddService <TPIReader>(tpi);
TPIHashReader tpiHash = null;
// init TPIHash
if (Type != PDBType.Old && tpi.Header.Hash.StreamNumber != -1)
{
byte[] tpiHashData = streamTable.GetStream(tpi.Header.Hash.StreamNumber);
tpiHash = new TPIHashReader(Services, tpiHashData);
Services.AddService <TPIHashReader>(tpiHash);
}
// init resolver
TypeResolver resolver = new TypeResolver(Services);
Services.AddService <TypeResolver>(resolver);
// init Hasher
HasherV2 hasher = new HasherV2(Services);
Services.AddService <HasherV2>(hasher);
if (Type != PDBType.Old)
{
{ // init NameMap
byte[] nameMapData = streamTable.GetStream(DefaultStreams.PDB);
PdbStreamReader nameMap = new PdbStreamReader(nameMapData);
Services.AddService <PdbStreamReader>(nameMap);
}
NamedStreamTableReader namedStreamTable = new NamedStreamTableReader(Services);
Services.AddService <NamedStreamTableReader>(namedStreamTable);
{ // init UdtNameMap
byte[] namesData = namedStreamTable.GetStreamByName("/names");
if (namesData != null)
{
UdtNameTableReader udtNameTable = new UdtNameTableReader(Services, namesData);
Services.AddService <UdtNameTableReader>(udtNameTable);
}
}
}
}