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filmorfilmor
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Implement loader for .NET Framework
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7 files changed

+164
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‎.gitignore

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@@ -1,7 +1,8 @@
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# .NET Core build folders
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example/bin
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example/obj
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example/out
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bin/
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out/
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obj/
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.vs/
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### Python ###
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# Byte-compiled / optimized / DLL files

‎clr_loader/ffi/__init__.py

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@@ -3,13 +3,13 @@
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import cffi
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from . import coreclr, hostfxr, mono
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from . import coreclr, hostfxr, mono, framework
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__all__ = ["ffi", "load_coreclr", "load_hostfxr", "load_mono"]
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__all__ = ["ffi", "load_coreclr", "load_hostfxr", "load_mono", "load_framework"]
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ffi = cffi.FFI()
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for cdef in coreclr.cdef + hostfxr.cdef + mono.cdef:
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for cdef in coreclr.cdef + hostfxr.cdef + mono.cdef + framework.cdef:
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ffi.cdef(cdef)
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@@ -40,6 +40,12 @@ def load_mono(path=None, gc=None):
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return ffi.dlopen(path)
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def load_framework():
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path = "netframework_loader/bin/x64/Debug/net472/ClrLoader.dll"
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return ffi.dlopen(path)
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def _get_dll_name(name):
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import sys
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‎clr_loader/ffi/framework.py

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cdef = [
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"""
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typedef void* pyclr_domain;
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typedef int (*entry_point)(void* buffer, int size);
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void* pyclr_create_appdomain(const char* name, const char* config_file);
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entry_point pyclr_get_function(pyclr_domain domain, const char* assembly_path, const char* class_name, const char* function);
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void pyclr_close_appdomain(pyclr_domain domain);
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"""
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]

‎clr_loader/framework.py

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from .ffi import ffi, load_framework
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_FW = None
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class Framework:
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def __init__(self, name=None, config_file=None):
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global _FW
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if _FW is None:
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_FW = load_framework()
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self._domain = _FW.pyclr_create_appdomain(
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name or ffi.NULL, config_file or ffi.NULL
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)
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def get_callable(self, assembly_path, typename, function):
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func = _FW.pyclr_get_function(
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self._domain,
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assembly_path.encode("utf8"),
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typename.encode("utf8"),
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function.encode("utf8"),
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)
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return func
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def __del__(self):
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if self._domain and _FW:
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_FW.pyclr_close_appdomain(self._domain)

‎example/example.csproj

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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
1-
<Project Sdk="Microsoft.NET.Sdk">
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>netcoreapp3.0</TargetFrameworks>
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<TargetFrameworks>netcoreapp30;netstandard20</TargetFrameworks>
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<GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
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</PropertyGroup>
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</Project>

‎netframework_loader/ClrLoader.cs

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using System;
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using System.Diagnostics;
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using System.Globalization;
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using System.IO;
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using System.Reflection;
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using System.Runtime.InteropServices;
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using RGiesecke.DllExport;
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namespace ClrLoader
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{
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public static class ClrLoader
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{
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delegate int EntryPoint(IntPtr buffer, int size);
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[DllExport("pyclr_create_appdomain", CallingConvention.Cdecl)]
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public static IntPtr CreateAppDomain(
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[MarshalAs(UnmanagedType.LPUTF8Str)] string name,
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[MarshalAs(UnmanagedType.LPUTF8Str)] string configFile
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)
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{
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Print($"Creating AppDomain {name} with {configFile}");
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if (!string.IsNullOrEmpty(name))
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{
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var setup = new AppDomainSetup
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{
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ConfigurationFile = configFile
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};
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var domain = AppDomain.CreateDomain(name, null, setup);
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Print($"Located domain {domain}");
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var handle = GCHandle.Alloc(domain, GCHandleType.Pinned);
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Print($"Created handle {handle}");
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return handle.AddrOfPinnedObject();
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}
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else
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{
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return IntPtr.Zero;
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}
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}
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[DllExport("pyclr_get_function", CallingConvention.Cdecl)]
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public static IntPtr GetFunction(
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IntPtr domain,
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[MarshalAs(UnmanagedType.LPUTF8Str)] string assemblyPath,
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[MarshalAs(UnmanagedType.LPUTF8Str)] string typeName,
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[MarshalAs(UnmanagedType.LPUTF8Str)] string function
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)
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{
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try
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{
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var domainObj = AppDomain.CurrentDomain;
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if (domain != IntPtr.Zero)
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{
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var handle = GCHandle.FromIntPtr(domain);
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domainObj = (AppDomain)handle.Target;
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}
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var assembly = domainObj.Load(AssemblyName.GetAssemblyName(assemblyPath));
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var type = assembly.GetType(typeName, throwOnError: true);
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Print($"Loaded type {type}");
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var deleg = Delegate.CreateDelegate(typeof(EntryPoint), type, function);
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66+
return Marshal.GetFunctionPointerForDelegate(deleg);
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}
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catch (Exception exc)
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{
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Print($"Exception in {nameof(GetFunction)}: {exc.GetType().Name} {exc.Message}\n{exc.StackTrace}");
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return IntPtr.Zero;
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}
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}
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[DllExport("pyclr_close_appdomain", CallingConvention.Cdecl)]
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public static void CloseAppDomain(IntPtr domain)
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{
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if (domain != IntPtr.Zero)
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{
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var handle = GCHandle.FromIntPtr(domain);
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var domainObj = (AppDomain)handle.Target;
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AppDomain.Unload(domainObj);
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handle.Free();
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}
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}
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static void Print(string s)
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{
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Console.WriteLine(s);
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}
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}
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}

‎netframework_loader/ClrLoader.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>net472</TargetFrameworks>
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<Platforms>x64;x86</Platforms>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="UnmanagedExports.Repack.Upgrade" Version="1.2.1" />
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</ItemGroup>
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<PropertyGroup Condition=" '$(Platform)' == 'x86'">
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<PlatformTarget>x86</PlatformTarget>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Platform)' == 'x64'">
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<PlatformTarget>x64</PlatformTarget>
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</PropertyGroup>
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</Project>

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