static DynamicResolver()
{
var assembly = typeof(DynamicMethod).Assembly;
dynamicResolverType = assembly.GetType("System.Reflection.Emit.DynamicResolver");
dynamicILInfoType = assembly.GetType("System.Reflection.Emit.DynamicILInfo");
dynamicILGeneratorType = assembly.GetType("System.Reflection.Emit.DynamicILGenerator");
BuildFactoryByDynamicILInfo();
BuildFactoryByDynamicILGenerator();
BuildGetCodeInfoDelegate();
BuildGetRawEHInfoDelegate();
BuildGetEHInfoDelegate();
var m_methodField = dynamicResolverType.GetField("m_method", BindingFlags.Instance | BindingFlags.NonPublic);
if (m_methodField == null)
{
throw new InvalidOperationException("Field 'DynamicResolver.m_methodField' is not found");
}
m_methodSetter = FieldsExtractor.GetSetter(m_methodField);
var m_resolverField = typeof(DynamicMethod).GetField("m_resolver", BindingFlags.Instance | BindingFlags.NonPublic);
if (m_resolverField == null)
{
throw new InvalidOperationException("Field 'DynamicResolver.m_resolver' is not found");
}
m_resolverSetter = FieldsExtractor.GetSetter <DynamicMethod, object>(m_resolverField);
var m_localSignatureField = dynamicResolverType.GetField("m_localSignature", BindingFlags.Instance | BindingFlags.NonPublic);
if (m_localSignatureField == null)
{
throw new InvalidOperationException("Field 'DynamicResolver.m_localSignature' is not found");
}
m_localSignatureExtractor = FieldsExtractor.GetExtractor <object, byte[]>(m_localSignatureField);
}
private static Expression GetSetter(FieldInfo field, Expression obj, Expression newValue)
{
var setter = FieldsExtractor.GetSetter(field);
return(Expression.Invoke(Expression.Constant(setter), obj ?? Expression.Constant(null), Expression.Convert(newValue, typeof(object))));
}