Native compilation and WMI

[olegsavelos]

I am experimenting with native compilation with .NET 5 and having troubles with executing code that contains references to WMI.

Here is an example code

public class NativeLibrary { [NativeCallable(EntryPoint = "authorize", CallingConvention = CallingConvention.StdCall)] public static IntPtr Authorize() { var m = new System.Management.ManagementClass("Win32_BIOS"); return IntPtr.Zero; } }

When called this exception error is printed in console window

Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidProgramException: Common Language Runtime detected an invalid program. The body of method 'Void System.Management.WbemDefPath..ctor()' is invalid. at Internal.Runtime.TypeLoaderExceptionHelper.CreateInvalidProgramException(ExceptionStringID, String) + 0x40 at Internal.Runtime.CompilerHelpers.ThrowHelpers.ThrowInvalidProgramExceptionWithArgument(ExceptionStringID, String) + 0x9 at System.Management.WbemDefPath..ctor() + 0x15 at NativeLibrary!<BaseAddress>+0x23dd59 at System.InvokeUtils.CallDynamicInvokeMethod(Object, IntPtr, Object, IntPtr, IntPtr, Object, Object[], BinderBundle, Boolean, Boolean, Boolean) + 0x25d --- End of inner exception stack trace --- at System.InvokeUtils.CallDynamicInvokeMethod(Object, IntPtr, Object, IntPtr, IntPtr, Object, Object[], BinderBundle, Boolean, Boolean, Boolean) + 0x414 at Internal.Reflection.Execution.MethodInvokers.InstanceMethodInvoker.Invoke(Object, Object[], BinderBundle, Boolean) + 0x7f at Internal.Reflection.Core.Execution.MethodInvoker.Invoke(Object, Object[], Binder, BindingFlags, CultureInfo) + 0x46 at System.Reflection.Runtime.MethodInfos.RuntimePlainConstructorInfo1.Invoke(BindingFlags, Binder, Object[], CultureInfo) + 0x90
at System.ActivatorImplementation.CreateInstance(Type, Boolean) + 0xb7
at System.Management.MTAHelper.CreateInMTA(Type) + 0x37
at System.Management.ManagementPath.CreateWbemPath(String) + 0x1d
at NativeLibrary!+0x6a68d`

There is not much information that i could find but as i understand it has to do with COM interop?

[jkotas]

Yes, this looks like a problem with COM interop. CoreRT does not support COM interop currently. This is tracked by #4219 .

Also, NativeCallableAttribute was renamed to UnmanagedCallersOnlyAttribute as part of making it official public .NET API (dotnet/runtime#35433). But that is not the root cause of the problem that you are seeing.