Dotnet Core Crl Host

xmegz / clrhost

.Net core crl application host start

.Net Core Runtime Host Start

• Simple conception howto start .Net Core Runtime from native code

• C++ part and C# part debugging is also possible.

• Simple conception for windows to inject dotnet assembly to native exe as resource

• Just for dotnet 8

Main repository

https://github.com/dotnet/runtime

https://mattwarren.org/2017/03/23/Hitchhikers-Guide-to-the-CoreCLR-Source-Code/

Tutorials

https://learn.microsoft.com/en-us/dotnet/core/tutorials/netcore-hosting

Design

https://github.com/dotnet/runtime/blob/main/docs/design/features/native-hosting.md

APIs for hosting and resolve net runtime

https://github.com/dotnet/runtime/blob/main/src/native/corehost/coreclr_delegates.h https://github.com/dotnet/runtime/blob/main/src/native/corehost/coreclr_resolver.h https://github.com/dotnet/runtime/blob/main/src/native/corehost/nethost/nethost.h https://github.com/dotnet/runtime/blob/main/src/native/corehost/hostfxr.h

Sample Host Example Project

https://github.com/dotnet/samples/blob/main/core/hosting/src/NativeHost/nativehost.cpp

AssemblyLoadBytes trace

https://github.com/dotnet/runtime/blob/main/src/libraries/System.Private.CoreLib/src/Internal/Runtime/InteropServices/ComponentActivator.cs

    public static unsafe int LoadAssemblyBytes(byte* assembly, nint assemblyByteLength, byte* symbols, nint symbolsByteLength, IntPtr loadContext, IntPtr reserved)
        {
            if (!IsSupported)
                return HostFeatureDisabled
            try
            {
                ArgumentNullException.ThrowIfNull(assembly);
                ArgumentOutOfRangeException.ThrowIfNegativeOrZero(assemblyByteLength);
                ArgumentOutOfRangeException.ThrowIfGreaterThan(assemblyByteLength, int.MaxValue);
                ArgumentOutOfRangeException.ThrowIfNotEqual(loadContext, IntPtr.Zero);
                ArgumentOutOfRangeException.ThrowIfNotEqual(reserved, IntPtr.Zero);

                ReadOnlySpan<byte> assemblySpan = new ReadOnlySpan<byte>(assembly, (int)assemblyByteLength);
                ReadOnlySpan<byte> symbolsSpan = default;
                if (symbols != null && symbolsByteLength > 0)
                {
                    symbolsSpan = new ReadOnlySpan<byte>(symbols, (int)symbolsByteLength);
                }

                LoadAssemblyBytesLocal(assemblySpan, symbolsSpan);
            }
            catch (Exception e)
            {
                return e.HResult;
            }

            return 0;

            [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode",
                Justification = "The same feature switch applies to GetFunctionPointer and this function.

…

View on GitHub

Comments

[Tamas Padar]

Let's try it