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.NET 9 Project won't start on Android with 16kb page size enabled #9829

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phillippschmedt opened this issue Feb 24, 2025 · 4 comments
Open

.NET 9 Project won't start on Android with 16kb page size enabled #9829

phillippschmedt opened this issue Feb 24, 2025 · 4 comments
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@grendello
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Area: App Runtime Issues in `libmonodroid.so`.

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@phillippschmedt
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phillippschmedt commented Feb 24, 2025 •
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Description

When creating a fresh .NET 9 MAUI project and trying to deploy it on an android 15 device with 16kb page size enabled the app won't start. Problem happens on emulator and real device.

Steps to Reproduce

  1. Create an android 16kb emulator as described here: https://developer.android.com/guide/practices/page-sizes#16kb-emulator
  2. Create a new .NET 9 MAUI project
  3. Try to start on the emulator

Link to public reproduction project repository

https://github.com/phillippschmedt/Android16KBProblems

Version with bug

9.0.40 SR4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Android

Affected platform versions

Android 15 16Kb enabled emulator or real device with 16kb enabled (pixel 8a, pixel 8)

Did you find any workaround?

No

Relevant log output


      		
    

      
  





        



            
            

              
            

        

      


      
    








      

    



      

  
            


    

    

      
    

    


      

          @jfversluis
jfversluis




        transferred this issue from dotnet/maui


      Feb 24, 2025

    

  



    

    

      
    

    


      

          @dotnet-policy-service
dotnet-policy-service
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          added
  the 

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  Issues that need to be assigned.
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      Feb 24, 2025

    

  



    


    

    

      
    

    


      

          @jpobst
jpobst




            added
      

  Area: App Runtime

  Issues in `libmonodroid.so`.

    and removed
      

  needs-triage

  Issues that need to be assigned.

      

  t/bug


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      Feb 24, 2025

    

  








      

  
      



  

  @borrrden





  


    

      

  

    

        
    
    

  


      
          
  
      
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            borrrden
  

      

      

      commented


        Mar 24, 2025


      
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I'm curious about this as well.  Is there some way to signal using 16k page aligned libraries?  I find the following in my APK to be unaligned (all of the AOT ones are aligned, but these are prebuilt before the app by Microsoft, I believe) when compiling for .NET 8 via .NET 9.0.200


    

  • libSystem.Security.Cryptography.Native.Android.so
    • 

  • libmonodroid.so
    • 

  • libmono-component-marshal-ilgen.so
    • 

  • libmonosgen-2.0.so
    • 

  • libSystem.IO.Compression.Native.so
    • 

  • libSystem.Native.so
    • 



I do indeed so that at least Microsoft.NETCore.App.Runtime.Mono.android-arm64/8.0.13/runtimes/android-arm64/native/libmonosgen-2.0.so is not properly aligned but 9.0.2 is so that might be a clue.  Does this require actually TARGETING .NET 9 (net9.0-android) or is it enough to build with the .NET 9 tooling?

      		
    

  





        


            

            
            

              
            

        

      


      

            
  

    
  
    
    

  

  


    












      

  
      



  

  @amirvenus





  


    

      

  

    

        
    
    

  


      
          
  
      
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Are you sure this is a Maui bug?


Would you be able to reproduce with a plain .net for Android app (NOT Maui)?

      		
    

  





        


            

            
            

              
            

        

      


      

            
  

    
  
    
    

  

  


    












      

  
      



  

  @phillippschmedt





  


    

      

  

    

        
    
    

  


      
          
  
      
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@amirvenus I am only using .NET MAUI. I can't talk about anything else, sorry.

      		
    

  





        


            

            
            

              
            

        

      


      

            
  

    
  
    
    

  

  


    












      

  
      



  

  @borrrden





  


    

      

  

    

        
    
    

  


      
          
  
      
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            borrrden
  

      

      

      commented


        Apr 8, 2025


      
    


  





      


        


  
    

      
          
I would bet this is not MAUI specific.

      		
    

  





        


            

            
            

              
            

        

      


      

            
  

    
  
    
    

  

  


    
















  
  

    

      

  





  




  
  

              

  
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      @grendello
  
    grendello
    

      








      


  


  

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    Area: App Runtime

  Issues in `libmonodroid.so`.








      

  

    

        

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      5 participants
    

    

        
          @jpobst 
        
          @grendello 
        
          @borrrden 
        
          @amirvenus 
        
          @phillippschmedt