private MetadataReader GetSystemModuleMetadataReader()
{
if (_systemModuleReader == null)
{
if (_assemblyResolver != null)
{
_systemModuleReader = _assemblyResolver.FindAssembly(SystemModuleName, Filename);
}
}
return(_systemModuleReader);
}
/// <summary>
/// Open a given reference assembly (relative to this ECMA metadata file).
/// </summary>
/// <param name="refAsmIndex">Reference assembly index</param>
/// <returns>EcmaMetadataReader instance representing the reference assembly</returns>
public EcmaMetadataReader OpenReferenceAssembly(int refAsmIndex)
{
if (refAsmIndex == 0)
{
return(this);
}
int assemblyRefCount = MetadataReader.GetTableRowCount(TableIndex.AssemblyRef);
string name;
if (refAsmIndex <= assemblyRefCount)
{
AssemblyReference asmRef = MetadataReader.GetAssemblyReference(MetadataTokens.AssemblyReferenceHandle(refAsmIndex));
name = MetadataReader.GetString(asmRef.Name);
}
else
{
name = ManifestReferenceAssemblies[refAsmIndex - assemblyRefCount - 2];
}
EcmaMetadataReader ecmaReader;
if (!_assemblyCache.TryGetValue(name, out ecmaReader))
{
string assemblyPath = _assemblyResolver.FindAssembly(name, Filename);
if (assemblyPath == null)
{
throw new Exception($"Missing reference assembly: {name}");
}
ecmaReader = new EcmaMetadataReader(_assemblyResolver, assemblyPath, ManifestReferenceAssemblies);
_assemblyCache.Add(name, ecmaReader);
}
return(ecmaReader);
}
/// <summary>
/// Open a given reference assembly (relative to this ECMA metadata file).
/// </summary>
/// <param name="refAsmIndex">Reference assembly index</param>
/// <returns>MetadataReader instance representing the reference assembly</returns>
internal MetadataReader OpenReferenceAssembly(int refAsmIndex)
{
if (refAsmIndex == 0)
{
return(this.MetadataReader);
}
MetadataReader result;
if (!_assemblyCache.TryGetValue(refAsmIndex, out result))
{
AssemblyReferenceHandle assemblyReferenceHandle = GetAssemblyAtIndex(refAsmIndex, out MetadataReader metadataReader);
result = _assemblyResolver.FindAssembly(metadataReader, assemblyReferenceHandle, Filename);
if (result == null)
{
string name = metadataReader.GetString(metadataReader.GetAssemblyReference(assemblyReferenceHandle).Name);
throw new Exception($"Missing reference assembly: {name}");
}
_assemblyCache.Add(refAsmIndex, result);
}
return(result);
}
/// <summary>
/// Open a given reference assembly (relative to this ECMA metadata file).
/// </summary>
/// <param name="refAsmIndex">Reference assembly index</param>
/// <returns>MetadataReader instance representing the reference assembly</returns>
internal MetadataReader OpenReferenceAssembly(int refAsmIndex)
{
if (refAsmIndex == 0)
{
return(this.MetadataReader);
}
int assemblyRefCount = MetadataReader.GetTableRowCount(TableIndex.AssemblyRef);
MetadataReader metadataReader;
AssemblyReferenceHandle assemblyReferenceHandle;
if (refAsmIndex <= assemblyRefCount)
{
metadataReader = MetadataReader;
assemblyReferenceHandle = MetadataTokens.AssemblyReferenceHandle(refAsmIndex);
}
else
{
metadataReader = _manifestReader;
assemblyReferenceHandle = _manifestReferences[refAsmIndex - assemblyRefCount - 2];
}
MetadataReader result;
if (!_assemblyCache.TryGetValue(refAsmIndex, out result))
{
result = _assemblyResolver.FindAssembly(metadataReader, assemblyReferenceHandle, Filename);
if (result == null)
{
string name = metadataReader.GetString(metadataReader.GetAssemblyReference(assemblyReferenceHandle).Name);
throw new Exception($"Missing reference assembly: {name}");
}
_assemblyCache.Add(refAsmIndex, result);
}
return(result);
}
/// <summary>
/// Initialize generic method instances with argument types and runtime function indices from InstanceMethodEntrypoints
/// </summary>
private void ParseInstanceMethodEntrypoints(bool[] isEntryPoint)
{
if (!ReadyToRunHeader.Sections.TryGetValue(ReadyToRunSectionType.InstanceMethodEntryPoints, out ReadyToRunSection instMethodEntryPointSection))
{
return;
}
int instMethodEntryPointsOffset = GetOffset(instMethodEntryPointSection.RelativeVirtualAddress);
NativeParser parser = new NativeParser(Image, (uint)instMethodEntryPointsOffset);
NativeHashtable instMethodEntryPoints = new NativeHashtable(Image, parser, (uint)(instMethodEntryPointsOffset + instMethodEntryPointSection.Size));
NativeHashtable.AllEntriesEnumerator allEntriesEnum = instMethodEntryPoints.EnumerateAllEntries();
NativeParser curParser = allEntriesEnum.GetNext();
while (!curParser.IsNull())
{
SignatureDecoder decoder = new SignatureDecoder(_assemblyResolver, this, (int)curParser.Offset);
MetadataReader mdReader = _composite ? null : _assemblyCache[0];
string owningType = null;
uint methodFlags = decoder.ReadUInt();
if ((methodFlags & (uint)ReadyToRunMethodSigFlags.READYTORUN_METHOD_SIG_OwnerType) != 0)
{
mdReader = decoder.GetMetadataReaderFromModuleOverride();
if (mdReader == null)
{
// The only types that don't have module overrides on them in composite images are primitive types within System.Private.CoreLib
mdReader = _assemblyResolver.FindAssembly("System.Private.CoreLib", Filename);
}
owningType = decoder.ReadTypeSignatureNoEmit();
}
if ((methodFlags & (uint)ReadyToRunMethodSigFlags.READYTORUN_METHOD_SIG_SlotInsteadOfToken) != 0)
{
throw new NotImplementedException();
}
EntityHandle methodHandle;
int rid = (int)decoder.ReadUInt();
if ((methodFlags & (uint)ReadyToRunMethodSigFlags.READYTORUN_METHOD_SIG_MemberRefToken) != 0)
{
methodHandle = MetadataTokens.MemberReferenceHandle(rid);
}
else
{
methodHandle = MetadataTokens.MethodDefinitionHandle(rid);
}
string[] methodTypeArgs = null;
if ((methodFlags & (uint)ReadyToRunMethodSigFlags.READYTORUN_METHOD_SIG_MethodInstantiation) != 0)
{
uint typeArgCount = decoder.ReadUInt();
methodTypeArgs = new string[typeArgCount];
for (int typeArgIndex = 0; typeArgIndex < typeArgCount; typeArgIndex++)
{
methodTypeArgs[typeArgIndex] = decoder.ReadTypeSignatureNoEmit();
}
}
string constrainedType = null;
if ((methodFlags & (uint)ReadyToRunMethodSigFlags.READYTORUN_METHOD_SIG_Constrained) != 0)
{
constrainedType = decoder.ReadTypeSignatureNoEmit();
}
int runtimeFunctionId;
int?fixupOffset;
GetRuntimeFunctionIndexFromOffset((int)decoder.Offset, out runtimeFunctionId, out fixupOffset);
ReadyToRunMethod method = new ReadyToRunMethod(
this,
Methods.Count,
mdReader,
methodHandle,
runtimeFunctionId,
owningType,
constrainedType,
methodTypeArgs,
fixupOffset);
if (method.EntryPointRuntimeFunctionId >= 0 && method.EntryPointRuntimeFunctionId < isEntryPoint.Length)
{
isEntryPoint[method.EntryPointRuntimeFunctionId] = true;
}
Methods.Add(method);
InstanceMethods.Add(new InstanceMethod(curParser.LowHashcode, method));
curParser = allEntriesEnum.GetNext();
}
}
private MetadataReader GetSystemModuleMetadataReader() => _systemModuleReader ??= _assemblyResolver.FindAssembly(SystemModuleName, Filename);
