internal MetadataBase(MetadataHeader mdHeader, bool isStandalonePortablePdb)
{
allStreams = new List <DotNetStream>();
peImage = null;
cor20Header = null;
this.mdHeader = mdHeader;
this.isStandalonePortablePdb = isStandalonePortablePdb;
}
/// <summary>
/// Create a <see cref="MetadataBase"/> instance
/// </summary>
/// <param name="peImage">The PE image</param>
/// <param name="verify"><c>true</c> if we should verify that it's a .NET PE file</param>
/// <returns>A new <see cref="MetadataBase"/> instance</returns>
static MetadataBase Create(IPEImage peImage, bool verify)
{
MetadataBase md = null;
try {
var dotNetDir = peImage.ImageNTHeaders.OptionalHeader.DataDirectories[14];
// Mono doesn't check that the Size field is >= 0x48
if (dotNetDir.VirtualAddress == 0)
{
throw new BadImageFormatException(".NET data directory RVA is 0");
}
var cor20HeaderReader = peImage.CreateReader(dotNetDir.VirtualAddress, 0x48);
var cor20Header = new ImageCor20Header(ref cor20HeaderReader, verify);
if (cor20Header.Metadata.VirtualAddress == 0)
{
throw new BadImageFormatException(".NET metadata RVA is 0");
}
var mdRva = cor20Header.Metadata.VirtualAddress;
// Don't use the size field, Mono ignores it. Create a reader that can read to EOF.
var mdHeaderReader = peImage.CreateReader(mdRva);
var mdHeader = new MetadataHeader(ref mdHeaderReader, verify);
if (verify)
{
foreach (var sh in mdHeader.StreamHeaders)
{
if ((ulong)sh.Offset + sh.StreamSize > mdHeaderReader.EndOffset)
{
throw new BadImageFormatException("Invalid stream header");
}
}
}
switch (GetMetadataType(mdHeader.StreamHeaders))
{
case MetadataType.Compressed:
md = new CompressedMetadata(peImage, cor20Header, mdHeader);
break;
case MetadataType.ENC:
md = new ENCMetadata(peImage, cor20Header, mdHeader);
break;
default:
throw new BadImageFormatException("No #~ or #- stream found");
}
md.Initialize(null);
return(md);
}
catch {
if (md != null)
{
md.Dispose();
}
throw;
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="peImage">The PE image</param>
/// <param name="cor20Header">The .NET header</param>
/// <param name="mdHeader">The MD header</param>
protected MetadataBase(IPEImage peImage, ImageCor20Header cor20Header, MetadataHeader mdHeader)
{
try {
allStreams = new List <DotNetStream>();
this.peImage = peImage;
this.cor20Header = cor20Header;
this.mdHeader = mdHeader;
isStandalonePortablePdb = false;
}
catch {
if (peImage != null)
{
peImage.Dispose();
}
throw;
}
}
/// <summary>
/// Dispose method
/// </summary>
/// <param name="disposing"><c>true</c> if called by <see cref="Dispose()"/></param>
protected virtual void Dispose(bool disposing)
{
if (!disposing)
{
return;
}
peImage?.Dispose();
stringsStream?.Dispose();
usStream?.Dispose();
blobStream?.Dispose();
guidStream?.Dispose();
tablesStream?.Dispose();
var as2 = allStreams;
if (as2 != null)
{
foreach (var stream in as2)
{
stream?.Dispose();
}
}
mdReaderFactoryToDisposeLater?.Dispose();
peImage = null;
cor20Header = null;
mdHeader = null;
stringsStream = null;
usStream = null;
blobStream = null;
guidStream = null;
tablesStream = null;
allStreams = null;
fieldRidToTypeDefRid = null;
methodRidToTypeDefRid = null;
typeDefRidToNestedClasses = null;
mdReaderFactoryToDisposeLater = null;
}
/// <inheritdoc/>
public ENCMetadata(IPEImage peImage, ImageCor20Header cor20Header, MetadataHeader mdHeader)
: base(peImage, cor20Header, mdHeader)
{
}
/// <inheritdoc/>
public CompressedMetadata(IPEImage peImage, ImageCor20Header cor20Header, MetadataHeader mdHeader)
: base(peImage, cor20Header, mdHeader)
{
}
