Question Needing help with IL2CPP code stripping of Entity Framework Core

I have EF Core working in the editor, but in an IL2CPP build on Windows I get the following runtime error:

Code (CSharp):

1. ExecutionEngineException: Attempting to call method 'Microsoft.EntityFrameworkCore.Metadata.Internal.ClrPropertySetterFactory[[Microsoft.EntityFrameworkCore.Metadata.IClrPropertySetter, Microsoft.EntityFrameworkCore, Version=3.1.18.0, Culture=neutral, PublicKeyToken=adb9793829ddae60]]::CreateGeneric<ProjectCards.Data.ServerDatabaseContext,Microsoft.EntityFrameworkCore.DbSet`1[[ProjectCards.Data.Referral, Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]],Microsoft.EntityFrameworkCore.DbSet`1[[ProjectCards.Data.Referral, Assembly-CSharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]]>' for which no ahead of time (AOT) code was generated.

I've tried adding it to a link.xml file like this:

Code (CSharp):

1. <assembly fullname="Microsoft.EntityFrameworkCore" preserve="all">
2.               <type fullname="Microsoft.EntityFrameworkCore.Metadata.Internal.ClrPropertySetterFactory`1" preserve="all">
3.                      <method signature="Microsoft.EntityFrameworkCore.Metadata.IClrPropertySetter CreateGeneric`3(ProjectCards.Data.ServerDatabaseContext,Microsoft.EntityFrameworkCore.DbSet`1,Microsoft.EntityFrameworkCore.DbSet`1)" preserve="all" />
4.               </type>
5.        </assembly>

I've also tried using the AotHelper from JSON.NET like this:

Code (CSharp):

1.         [Preserve]
2.         private void ConfigureAot()
3.         {
4.             this.Log("Configuring AOT");
5.             AotHelper.EnsureType<ClrPropertySetterFactory_AOT>();
6.         }
7.  
8.         [Preserve]
9.         private class ClrPropertySetterFactory_AOT : ClrPropertySetterFactory
10.         {
11.             [Preserve]
12.             public ClrPropertySetterFactory_AOT()
13.             {
14.                 CreateGeneric<ServerDatabaseContext, DbSet<ProjectCards.Data.Referral>, DbSet<ProjectCards.Data.Referral>>(null, null);
15.  
16.                 throw new NotImplementedException();
17.             }
18.         }

Neither approach worked though. Any ideas what I'm doing wrong?

 

Yes it is. I haven't made any progress on figuring it out, unfortunately.

I tried out another ORM (linq2db), and still running into IL2CPP issues with it as well. With that one its this call failing, which ultimately seems like the same issue I was having with Entity Framework that I got stuck on too.

Code (CSharp):

1. ExecutionEngineException: Attempting to call method 'System.Linq.Expressions.Interpreter.LightLambda::MakeRun1<LinqToDB.DataProvider.PostgreSQL.NpgsqlProviderAdapter+NpgsqlBinaryImporter,System.UInt64>' for which no ahead of time (AOT) code was generated.
2.   at System.Func`2[T,TResult].Invoke (T arg) [0x00000] in <00000000000000000000000000000000>:0
3.   at System.Linq.Expressions.Interpreter.LightLambda.MakeDelegate (System.Type delegateType) [0x00000] in <00000000000000000000000000000000>:0
4.   at System.Linq.Expressions.Interpreter.LightDelegateCreator.CreateDelegate (System.Runtime.CompilerServices.IStrongBox[] closure) [0x00000] in <00000000000000000000000000000000>:0

I already have this in the link.xml, but it wasn't enough to fix that issue.

Code (CSharp):

1.   <assembly fullname="System.Core">
2.     <type fullname="System.Linq.Expressions.Interpreter.LightLambda" preserve="all" />
3.   </assembly>

 

Can you provide any guidance on what it would be? "System.Linq.Expressions.Interpreter.LightLambda::MakeRun1" isn't a method I can call for the AotHelper.

 

I wish I could use those newer ones, but I need to stick to an LTS release. I've also heard of too many performance issues from fellow VR developers on Unity 2021, so I cannot update to that either. I target the Meta Quest where performance is critical.