void Read(IList <PdbCustomDebugInfo> result)
{
if (reader.Length < 4)
{
return;
}
int version = reader.ReadByte();
Debug.Assert(version == CustomDebugInfoConstants.Version);
if (version != CustomDebugInfoConstants.Version)
{
return;
}
int count = reader.ReadByte();
reader.Position += 2;
while (reader.CanRead(8U))
{
int recVersion = reader.ReadByte();
Debug.Assert(recVersion == CustomDebugInfoConstants.RecordVersion);
var recKind = (PdbCustomDebugInfoKind)reader.ReadByte();
reader.Position++;
int alignmentSize = reader.ReadByte();
int recSize = reader.ReadInt32();
if (recSize < 8 || (ulong)reader.Position - 8 + (uint)recSize > reader.Length)
{
return;
}
if (recKind <= PdbCustomDebugInfoKind.DynamicLocals)
{
alignmentSize = 0;
}
if (alignmentSize > 3)
{
return;
}
var nextRecPos = reader.Position - 8 + (uint)recSize;
if (recVersion == CustomDebugInfoConstants.RecordVersion)
{
ulong recPosEnd = (ulong)reader.Position - 8 + (uint)recSize - (uint)alignmentSize;
var cdi = ReadRecord(recKind, recPosEnd);
Debug.Assert(cdi != null);
Debug.Assert(reader.Position <= recPosEnd);
if (reader.Position > recPosEnd)
{
return;
}
if (cdi != null)
{
Debug.Assert(cdi.Kind == recKind);
result.Add(cdi);
}
}
reader.Position = nextRecPos;
}
}
static bool IsWindowsPdb(DataReader reader)
{
const string SIG = "Microsoft C/C++ MSF 7.00\r\n\u001ADS\0";
if (!reader.CanRead(SIG.Length))
{
return(false);
}
return(reader.ReadString(SIG.Length, Encoding.ASCII) == SIG);
}
/// <summary>
/// Creates a reader that can access a blob or returns false on failure
/// </summary>
/// <param name="offset">Offset of blob</param>
/// <param name="reader">Updated with the reader</param>
/// <returns></returns>
public bool TryCreateReader(uint offset, out DataReader reader)
{
reader = dataReader;
if (!IsValidOffset(offset))
{
return(false);
}
reader.Position = offset;
if (!reader.TryReadCompressedUInt32(out uint length))
{
return(false);
}
if (!reader.CanRead(length))
{
return(false);
}
reader = reader.Slice(reader.Position, length);
return(true);
}
/// <summary> /// Returns true if it's possibly resources file data /// </summary> /// <param name="reader">Reader</param> /// <returns></returns> public static bool CouldBeResourcesFile(DataReader reader) => reader.CanRead(4U) && reader.ReadUInt32() == 0xBEEFCACE;
