private static unsafe MetadataReaderProvider TryOpenReaderForInMemoryPdb(IntPtr inMemoryPdbAddress, int inMemoryPdbSize)
{
Debug.Assert(inMemoryPdbAddress != IntPtr.Zero);
// quick check to avoid throwing exceptions below in common cases:
const uint ManagedMetadataSignature = 0x424A5342;
if (inMemoryPdbSize < sizeof(uint) || *(uint *)inMemoryPdbAddress != ManagedMetadataSignature)
{
// not a Portable PDB
return(null);
}
var provider = MetadataReaderProvider.FromMetadataImage((byte *)inMemoryPdbAddress, inMemoryPdbSize);
try
{
// may throw if the metadata is invalid
provider.GetMetadataReader();
return(provider);
}
catch (BadImageFormatException)
{
provider.Dispose();
return(null);
}
}
private string ReadVersion(BlobBuilder metadata)
{
using (var provider = MetadataReaderProvider.FromMetadataImage(metadata.ToImmutableArray()))
{
return(provider.GetMetadataReader().MetadataVersion);
}
}
private unsafe static OpenedReader TryOpenReaderForInMemoryPdb(IntPtr inMemoryPdbAddress, int inMemoryPdbSize)
{
Debug.Assert(inMemoryPdbAddress != IntPtr.Zero);
// quick check to avoid throwing exceptions below in common cases:
const uint ManagedMetadataSignature = 0x424A5342;
if (inMemoryPdbSize < sizeof(uint) || *(uint *)inMemoryPdbAddress != ManagedMetadataSignature)
{
// not a Portable PDB
return(null);
}
OpenedReader result = null;
MetadataReaderProvider provider = null;
try
{
provider = MetadataReaderProvider.FromMetadataImage((byte *)inMemoryPdbAddress, inMemoryPdbSize);
result = new OpenedReader(provider, provider.GetMetadataReader());
}
catch (BadImageFormatException)
{
return(null);
}
finally
{
if (result == null)
{
provider?.Dispose();
}
}
return(result);
}
public unsafe void FromMetadataImage_BadArgs()
{
Assert.Throws <ArgumentNullException>(() => MetadataReaderProvider.FromMetadataImage(null, 10));
Assert.Throws <ArgumentOutOfRangeException>(() =>
{
fixed(byte *p = new byte[] { 0 }) MetadataReaderProvider.FromMetadataImage(p, -1);
});
Assert.Throws <ArgumentNullException>(() => MetadataReaderProvider.FromMetadataImage(default(ImmutableArray <byte>)));
}
// This has to be a service and be cached
public static MetadataReader CreateMetadataReader(this ClrModule module)
{
if (module.MetadataAddress == 0)
{
return(null);
}
var d = new byte[module.MetadataLength];
module.Runtime.ReadMemory(module.MetadataAddress, d, d.Length, out var read);
return(MetadataReaderProvider.FromMetadataImage(ImmutableArray.Create(d, 0, read)).GetMetadataReader());
}
public void GetOrAddDocumentName2()
{
var mdBuilder = new MetadataBuilder();
mdBuilder.AddModule(0, default(StringHandle), default(GuidHandle), default(GuidHandle), default(GuidHandle));
var n1 = mdBuilder.GetOrAddDocumentName("");
var n2 = mdBuilder.GetOrAddDocumentName("/a/b/c");
var n3 = mdBuilder.GetOrAddDocumentName(@"\a\b\cc");
var n4 = mdBuilder.GetOrAddDocumentName(@"/a/b\c");
var n5 = mdBuilder.GetOrAddDocumentName(@"/\a/\b\\//c");
var n6 = mdBuilder.GetOrAddDocumentName(@"a/");
var n7 = mdBuilder.GetOrAddDocumentName(@"/");
var n8 = mdBuilder.GetOrAddDocumentName(@"\\");
var n9 = mdBuilder.GetOrAddDocumentName("\ud800"); // unpaired surrogate
var n10 = mdBuilder.GetOrAddDocumentName("\0");
var root = new MetadataRootBuilder(mdBuilder);
var rootBuilder = new BlobBuilder();
root.Serialize(rootBuilder, 0, 0);
var mdImage = rootBuilder.ToImmutableArray();
using (var provider = MetadataReaderProvider.FromMetadataImage(mdImage))
{
var mdReader = provider.GetMetadataReader();
Assert.Equal("", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n1))));
Assert.Equal("/a/b/c", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n2))));
Assert.Equal(@"\a\b\cc", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n3))));
Assert.Equal(@"/a/b\c", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n4))));
Assert.Equal(@"/\a/\b\\//c", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n5))));
Assert.Equal(@"a/", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n6))));
Assert.Equal(@"/", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n7))));
Assert.Equal(@"\\", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n8))));
Assert.Equal("\uFFFd\uFFFd", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n9))));
Assert.Equal("\0", mdReader.GetString(MetadataTokens.DocumentNameBlobHandle(MetadataTokens.GetHeapOffset(n10))));
}
}
public void GetMetadataReader_FromMetadataImage()
{
TestGetMetadataReader(MetadataReaderProvider.FromMetadataImage(BuildMetadataImage().ToImmutableArray()));
}
private static MetadataReader GetMetadataReaderFromProvider() => MetadataReaderProvider.FromMetadataImage(PortablePdbs.DocumentsPdb.ToImmutableArray()).GetMetadataReader();