Unity 5.0.3f2 il2cpp problem: Attempting to call method 'System.Reflection.MonoProperty::GetterAdapt

@JoshPeterson Thanks for the quick response, but is it possible for me/you to verify if the fix is in 2017.1.0p3 or not? Just downloaded 2017.1 today and downloading and installing these patches without knowing if the fix is in them is quite troublesome (not to mention the building to iOS ). Thanks!

 

Take a look at the source and see if FullInspector is calling .GetValue on a PropertyInfo instance anywhere. I tracked down an edge case in Json .Net that was still doing it. If you replace that with .GetGetMethod().Invoke it should fix the problem.

 

Thank you Dustin-Horne, I will try it out when I get the time. As always you are very helpful!

 

So.. is the fix released to 2017.1 branch?

 

@JoshPeterson I have the same issue, and it persists on the current 2017.2beta despite what you said about it being fixed. Like others, the AOT issue only happens on iOS (well, I haven't tried Android), rendering the game incompatible with the platform.

 

Hi, I have an issue which seems to be the same. I used Unity 5.6.3.p4 with .net 2.0

Code (CSharp):

1. ExecutionEngineException: Attempting to call method 'AssetPackage.GameStorageClientAsset+InternalXmlSerializer::Deserialize' for which no ahead of time (AOT) code was generated.
2.   at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
3.   at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
4.   at AssetPackage.GameStorageClientAsset.DeserializeDataXml (ISerializer serializer, AssetPackage.Node root, System.String data, StorageLocations location, SerializingFormat format, System.Collections.Generic.List`1 enumeration) [0x00000] in <filename unknown>:0
5.   at AssetPackage.GameStorageClientAsset.DeSerializeData (System.String model, System.String data, StorageLocations location, SerializingFormat format, System.Collections.Generic.List`1 enumeration) [0x00000] in <filename unknown>:0
6.   at AssetPackage.GameStorageClientAsset.LoadData (System.String model, StorageLocations location, SerializingFormat format) [0x00000] in <filename unknown>:0
7.   at CompetenceAssessmentAssetNameSpace.CompetenceAssessmentHandler.loadCompetenceStateFromGameStorage () [0x00000] in <filename unknown>:0

How can I fix that ?

Thanls

 

That's a different error. That looks like a stripping issue. You'll need to put [Preserve] attributes on things that you control that are being stripped... if you don't control them, as the above which appears to be an asset package, you'll want to update your link.xml file to make sure those methods aren't being stripped.

 

Hi, thanks for the answer. I have access to the source code, so I will try to add this attribute where it seems to be needed.

Thanks

 

I tried to add the [Preserve] attribute to the concerned class and method and the issue persisted. Then I unchecked "strip engine code" in player settings and I still have the issue. I will check, but I'm pretty sure the issue only appears when using .net 2.0.

 

Ok, I had missed the .NET bit, I thought you were using IL2CPP which always does some stripping. This does however point to a stripping issue.

Code (csharp):

1.  
2. AssetPackage.GameStorageClientAsset+InternalXmlSerializer::Deserialize
3.  

So, the GameStorageClientAsset has a class called InternalXmlSerializer which has a Deserialize method on it. That Deserialize method is getting stripped, or the stack trace could be slightly off and it could be something inside of Deserialize, so it's trying to use reflection to populate something for which a setter has been deserialized. But, it looks to me like it's the Deserialize method itself that's being stripped.

 

Hi,

I'm actually using IL2CPP backend target and .net 2.0 API compatibility level. Does that change something ? Does using IL2CPP means that code stripping will occurred wether or not I put the [Preserve] attribute ? Because I do use it in the InternalXmlSerializer class and oll of its methods.

ps: Maybe I should have precised that my app is targeting iOS ?

Thanks

 

Yes, IL2CPP does code stripping always. The [Preserve] attribute should prevent things from being stripped, but it appears not to be. Can you try using a link.xml and preserving that entire namespace?

 

Yes, Im trying to but I'm always getting errors like :
"Failed running /Applications/Unity/Unity.app/Contents/Tools/UnusedByteCodeStripper2/UnusedBytecodeStripper2.exe --api NET_2_0 -out ..."

"stdout:
Fatal error in Mono CIL Linker
System.ArgumentException: Unable to find the file for the assembly named 'AssetPackage, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' specified in link file '/Users/..../Assets/_Scripts/XML/link.xml'. Should this assembly be in the project? Use the 'ignoreIfMissing="1"' attribute if this assembly may not always exist. ---> Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'AssetPackage, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'"

 

what does your link.xml file look like?

 

Hi,

It looks something like that:

<linker>
<assembly fullname="AssetPackage">
<type fullname="AssetPackage.GameStorageClientAsset" preserve="all"/>
<type fullname="AssetPackage.InternalXmlSerializer" preserve="all"/>
</assembly>
</linker>

AssetPackage = namespace

Because it failed I tried different values, but it never worked.

Thanks for your time !

 

Try this:

Code (csharp):

1.  
2. <linker>
3. <assembly fullname="FixThisNmae">
4. <namespace fullname="AssetPackage" preserve="all"/>
5. </assembly>
6. </linker>
7.  

But, where it says FixThisName fix that. your assembly name isn't AssetPackage. Open your project in Visual Studio and tell me what your project names are.

 

I'm exchanging email with the authors and he told me that the assembly name is RageAssetManager. So I tired this :

<linker>
<assembly fullname="RageAssetManager">
<!-- <namespace fullname="AssetManagerPackage" preserve="all"/>
<namespace fullname="AssetPackage" preserve="all"/>-->
</assembly>
</linker>

And I still got this error :

stdout:
Fatal error in Mono CIL Linker
System.ArgumentException: Unable to find the file for the assembly named 'RageAssetManager, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' specified in link file '/Users/sebastien/Documents/00 KIUPE/00 PROJETS/KWED/MMF_BPI_KWED/Assets/_Scripts/_BPI/link.xml'. Should this assembly be in the project? Use the 'ignoreIfMissing="1"' attribute if this assembly may not always exist. ---> Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'RageAssetManager, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
[...]

Is that normal ? Thanks

 

now why did you comment out the namespace block? and I have no idea... that assembly obviously isn't in your project... either the game is wrong or something.

 

Is his asset compiled to a dll or us it source code in your project? previously you said you added preserve attributes.

 

Is it possible that there was a regression on this issue in Unity 2018 / .NET 4.6 runtime?

One of my users reports getting it with the following configuration while trying to build for HoloLens:

• Development OS: Windows 10.0.16299
• Unity Version: 2018.1.0f2
• Targeted UWP SDK Version: 10.0.14393.0 (Latest stable HoloLens version)
• Available SDK Version Range: 10.0.10240 - 10.0.16299
• Scripting Runtime Version 3.5 or 4.x Equivalent
• Scripting Backend: IL2CPP

The offending line appears to be:

Code (CSharp):

1. return ((PropertyInfo)_memberInfo).GetValue(context, new object[] { });

 

IL2CPP or .NET Backend?

 

IL2CPP, as indicated in my post.

 

oh sheesh... missed that. I've worked around the issue to support IL2CPP (and general AOT platforms). You can do this instead:

Code (csharp):

1.  
2. return ((PropertyInfo)_memberInfo).GetGetMethod().Invoke(context, null);
3.  

 

I saw that workaround, but I have quite a few places that use GetValue in my code -- and some in reference DLLs that I can't edit. Was the issue supposed to be fixed?

 

Well... GetValue never fully worked properly on AOT platforms I believe (like even on iOS + .NET Backend). Does it fail for you always or just sometimes? I'm guessing it's probably an unfortunate regression. I actually do this:

Code (csharp):

1.  
2. #if AOT
3.                         return ((PropertyInfo)member).GetGetMethod().Invoke(target, null);
4. #else
5.                         return ((PropertyInfo)member).GetValue(target, null);
6. #endif
7.  

I define the AOT symbol for assemblies that will be mapped to iOS, Android or anything IL2CPP, although I need to push an update to support IL2CPP on PC Builds that's in 2018.1.

 

My plugin (Bolt) heavily relies on reflection and I've never had an issue on AOT builds (with the proper link.xml and stubs). This is the first time a user encounters this. I believe it's the mix of Unity 2018, IL2CPP and .NET 4.6, because without these conditions, everything seems to work fine. Can we reopen a bug report? @JoshPeterson

 

Ok, I will ask my user to submit the report with their project files.

 

Hello,

I´m the User in Question. I will open a thread next thing in the morning (~ 9:00 CET)

@JoshPeterson Is /Platforms/Windows the right place for this? Should I upload the (complete but minimal) Unity project files and/or the generated Solution as a .zip file, or only the stack trace etc. ?

 

@JoshPeterson

I submitted a bug report with a minimal Unity Project. The case number is: 1034995

Thank you for your help!

 

@JoshPeterson

Having the same issue too.

I'm using a Unity adopted port of Newtonsoft.Json, and it completely fails to serialize classes with properties.
It outputs:

ExecutionEngineException: Attempting to call method 'System.Reflection.MonoProperty::GetterAdapterFrame' for which no ahead of time (AOT) code was generated.

  at System.Reflection.MonoProperty+GetterAdapter.Invoke (System.Object _this) [0x00000] in <00000000000000000000000000000000>:0 

  at System.Reflection.MonoProperty.GetValue (System.Object obj, System.Object[] index) [0x00000] in <00000000000000000000000000000000>:0 

Under .Net 3.5 it works fine.

Even though I've added

<assembly fullname="mscorlib">



        <type fullname="System.Reflection.*" preserve="all"/>



    </assembly>

and

<assembly fullname="mscorlib">



        <type fullname="System.Reflection.*" preserve="all"/>



    </assembly>

Into my link.xml and I can see that the method System.Reflection.MonoProperty::GetterAdapterFrame
does exist in generated Xcode project, it still fails in runtime.

 

I am experiencing same problem in Unity 2018.1.0f2 with .Net 4.x IL2CPP build.

 

What I found interesting... I have my experimental JSON .NET version that's built against .NET 4.6 specifically and it eliminated the issue on 2018.1.

 

My code is actually using GetGetMethod and calling Invoke which was experiencing the issue on IL2CPP builds against .NET 4.6 on 2018.1. This was to avoid previous GetValue() issues on AOT builds (dating back to Unity 3.5 / Mono on iOS and it stayed in place.

 

Hello,

Is there any estimate on when the patch is going to be released?

 

Hey

Just wanna let you know that I'm also experiencing this issue targeting Android with il2cpp scripting backend. I'm using Json.Net library that others mention here. This is a regression from Unity 5.6.3 where the same project worked just fine. Looking forward for the patch release.

@Dustin-Horne Did you fork this project: https://github.com/SaladLab/Json.Net.Unity3D ? Can you help me understand what exactly did you do to eliminate the issue? You refactored the `GetValue` calls to `GetGetMethod` and rebuilt it against .net 4.6?

 

No, the SaladLabs is someone else. They made it work more by stripping functionality. I did it by patching functionality to support AOT. Mine is here:
https://assetstore.unity.com/packages/tools/input-management/json-net-for-unity-11347

and the source repo is here:
https://github.com/ianmacgillivray/Json-NET-for-Unity

The source does not have the .net 4.6 build but DM me and I'll send you one. I'm working on getting it published, but yes it works.

 

I am seeing the same issue during runtime in WebGL and .NET 4. It works fine in standalone obviously. Any update on this?

EDIT: I was able to get this to work by upgrading to 2018.1.3f1 and changing the API compatibility to .NET standard 2.0 even though the scripting runtime version is still .NET 4.x equivalent because I need some c# 6 features. I don't understand the differences in those settings or weather or not I just broke something even though my app seems to run fine. Can anyone explain the difference?

UPDATE: I figured out that as long as I build everything with .NET 4.x and then change the compatibility setting right before building the WebGL version, everything works, but that is not a viable long term solution

 

@JoshPeterson any news or ETA on this?

 

I'm also waiting for the fix

 

Just tried 2018.1.4f1 and still broken:

deserialize behaviour.
System.Runtime.Serialization.SerializationException: Deserialization into 'Bolt.FlowMachine' failed. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ExecutionEngineException: Attempting to call method 'System.Reflection.MonoProperty::GetterAdapterFrame<Ludiq.Graph,UnityEngine.Vector2>' for which no ahead of time (AOT) code was generated.

--- End of inner exception stack trace ---
at System.Reflection.MonoProperty.GetValue (System.Object obj, System.Object[] index) [0x00000] in <00000000000000000000000000000000>:0
--- End of inner exception stack trace ---
at Ludiq.Serialization.DeserializeInto (Ludiq.SerializationData data, System.Object& instance, System.Boolean forceReflected) [0x00000] in <00000000000000000000000000000000>:0

(Filename: ./Runtime/Export/Debug.bindings.h Line: 43)

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I can confirm that on 2018.1.5f1 issue is still present when built player for UWP (IL2CPP) with compatibility level .NET 4.x.