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Auto inject Il2Cpp-Types #334

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Auto inject Il2Cpp-Types #334

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951f277
Auto inject Il2Cpp-Types
Nov 16, 2021
34ed233
Add support for Interfaces in Auto-Injector
Nov 16, 2021
c192406
Add attribute to disable Auto-Injector for Types or Assemblies
Nov 16, 2021
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8 changes: 5 additions & 3 deletions BepInEx.IL2CPP/IL2CPPChainloader.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
using System;
using System;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
Expand Down Expand Up @@ -156,9 +156,11 @@ protected override void InitializeLoggers()

public override BasePlugin LoadPlugin(PluginInfo pluginInfo, Assembly pluginAssembly)
{
var type = pluginAssembly.GetType(pluginInfo.TypeName);
PluginClassInjector.RegisterAssemblyInIl2Cpp(pluginAssembly);

var pluginInstance = (BasePlugin)Activator.CreateInstance(type);
var pluginType = pluginAssembly.GetType(pluginInfo.TypeName);

var pluginInstance = (BasePlugin)Activator.CreateInstance(pluginType);

pluginInstance.Load();

Expand Down
57 changes: 57 additions & 0 deletions BepInEx.IL2CPP/PluginClassInjector.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,57 @@
using System;
using System.Reflection;
using UnhollowerBaseLib;
using UnhollowerRuntimeLib;

namespace BepInEx.IL2CPP
{

[AttributeUsage(AttributeTargets.Class)]
public class Il2CppInterfaces : Attribute
{

public Type[] Interfaces { get; protected set; }

public Il2CppInterfaces(params Type[] interfaces)
{
Interfaces = interfaces;
}

}
Comment on lines +9 to +20
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I suggest Il2CppImplementsAttribute as the name.

Also, I agree with @js6pak that maybe this can be moved to Unhollower's ClassInjector class. This would make manual injector much, much easier (and it makes sense to keep this attribute on Unhollower's side).

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Ok I'll move it to Unhollower


[AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class)]
public class DontAutoRegisterInIl2Cpp : Attribute { }

internal class PluginClassInjector
{

public static void RegisterAssemblyInIl2Cpp(Assembly pluginAssembly)
{
if (pluginAssembly.GetCustomAttribute<DontAutoRegisterInIl2Cpp>() != null) return;

foreach (var type in pluginAssembly.DefinedTypes)
if (typeof(Il2CppObjectBase).IsAssignableFrom(type) && !ClassInjector.IsTypeRegisteredInIl2Cpp(type))
RegisterTypeInIl2Cpp(type);
}

public static bool RegisterTypeInIl2Cpp(Type type)
{
if(type.Assembly.GetCustomAttribute<DontAutoRegisterInIl2Cpp>() != null) return false;
if (type.GetCustomAttribute<DontAutoRegisterInIl2Cpp>() != null) return false;

if (!ClassInjector.IsTypeRegisteredInIl2Cpp(type.BaseType))
if (!RegisterTypeInIl2Cpp(type.BaseType))
return false;

var interfaces = type.GetCustomAttribute<Il2CppInterfaces>();

if (interfaces != null)
ClassInjector.RegisterTypeInIl2CppWithInterfaces(type, true, interfaces.Interfaces);
else
ClassInjector.RegisterTypeInIl2Cpp(type);

return true;
}

}
}