/// <inheritdoc/>
public void Clone(out IStream ppstm)
{
var newStream = stream.Clone();
newStream.Position = stream.Position;
ppstm = new ImageStreamIStream(newStream, name);
}
/// <summary>
/// Creates a new <see cref="ISymbolReader"/> instance
/// </summary>
/// <param name="mdStream">.NET metadata stream which is now owned by this method</param>
/// <param name="pdbStream">PDB file stream which is now owned by this method</param>
/// <returns>A new <see cref="ISymbolReader"/> instance or <c>null</c> if any of the COM
/// methods fail.</returns>
public static ISymbolReader Create(IImageStream mdStream, IImageStream pdbStream)
{
ImageStreamIStream stream = null;
PinnedMetaData pinnedMd = null;
bool error = true;
try
{
if (pdbStream == null || mdStream == null)
{
return(null);
}
object mdDispObj;
Guid CLSID_CorMetaDataDispenser = new Guid(0xE5CB7A31, 0x7512, 0x11D2, 0x89, 0xCE, 0x0, 0x80, 0xC7, 0x92, 0xE5, 0xD8);
Guid IID_IMetaDataDispenser = new Guid(0x809C652E, 0x7396, 0x11D2, 0x97, 0x71, 0x00, 0xA0, 0xC9, 0xB4, 0xD5, 0x0C);
int hr = CoCreateInstance(ref CLSID_CorMetaDataDispenser, IntPtr.Zero, 1, ref IID_IMetaDataDispenser, out mdDispObj);
if (hr < 0)
{
return(null);
}
object mdImportObj;
var mdDisp = (IMetaDataDispenser)mdDispObj;
Guid IID_IMetaDataImport = new Guid(0x7DAC8207, 0xD3AE, 0x4C75, 0x9B, 0x67, 0x92, 0x80, 0x1A, 0x49, 0x7D, 0x44);
pinnedMd = new PinnedMetaData(mdStream);
mdDisp.OpenScopeOnMemory(pinnedMd.Address, (uint)pinnedMd.Size, 0x10, ref IID_IMetaDataImport, out mdImportObj);
Marshal.FinalReleaseComObject(mdDispObj);
ISymUnmanagedReader symReader;
var binder = (ISymUnmanagedBinder)Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID_CorSymBinder_SxS));
stream = new ImageStreamIStream(pdbStream, null)
{
UserData = pinnedMd
};
hr = binder.GetReaderFromStream((IMetaDataImport)mdImportObj, stream, out symReader);
Marshal.FinalReleaseComObject(mdImportObj);
Marshal.FinalReleaseComObject(binder);
if (hr >= 0)
{
error = false;
return(new SymbolReader(symReader));
}
}
catch (IOException)
{
}
catch (InvalidCastException)
{
}
catch (COMException)
{
}
finally
{
if (error)
{
if (stream != null)
{
stream.Dispose();
}
if (pinnedMd != null)
{
pinnedMd.Dispose();
}
if (mdStream != null)
{
mdStream.Dispose();
}
if (pdbStream != null)
{
pdbStream.Dispose();
}
}
}
return(null);
}