GameAssembly.dll Access violation reading location

hein30 · October 27, 2020, 12:46pm

Unity 2019.4.11f1

I am getting access violation exception randomly when I try to use a large image array returned from window runtime component’s method.

There is no exception when I don’t try to access that large array. (i.e. if i comment out var array = e.imageArray;, I don’t get any exception).

 #if ENABLE_WINMD_SUPPORT
     void OneFrameAvailable(object sender, RMFrameData e){
         ++frameCounter;
         var height = e.height;
         var width = e.width;
         var array = e.imageArray;
       
       
         Enqueue(() => {
         if (tex == null)
                     {
                         tex = new Texture2D(width, height, TextureFormat.BGRA32, false);
                         material.mainTexture = tex;
                     }
                     tex.LoadRawTextureData(e.imageArray);
                     tex.Apply();
     });
     }
#endif

I’ve attached screenshots of call stack and breakpoint of where the exception is been thrown.

Tautvydas-Zilys · October 27, 2020, 5:21pm

Can you show the implementation of RMFrameData? A crash inside the garbage collector usually means memory corruption.

hein30 · October 27, 2020, 6:46pm

Completely newbie in C++ and trying to write the WRC.

FMFrameData.idl

runtimeclass RMFrameData
    {
        BYTE[] imageArray;
    }

#FrameData.h

struct FrameData : FrameData <RMFrameData>
{
   RMFrameData() = default;
   ~RMFrameData();

   com_array<uint8_t>& imageArray();
   void imageArray(array_view<uint8_t const> value);

private:
   com_array<uint8_t> m_imageArray{};
};

#FrameData.cpp

RMFrameData::~RMFrameData()
{
    m_imageArray.clear();
}
com_array<uint8_t>& RMFrameData::imageArray()
{
   return m_imageArray;
}
void RMFrameData::imageArray(array_view<uint8_t const> value)
{
   m_imageArray = winrt::com_array<BYTE>(std::move_iterator(value.begin()), std::move_iterator(value.end()));
}

Method sending RMFrameData

void PVProcessor::OnFrameArrived(const MediaFrameReader& sender, const MediaFrameArrivedEventArgs& args)
   {

       if (MediaFrameReference frame = sender.TryAcquireLatestFrame())
       {
           auto frame_data = winrt::make_self<winrt::HL2CV_WRT::implementation::RMFrameData>();

           if (frame != nullptr && frame.VideoMediaFrame() != nullptr) {
  
               uint32_t pixelBufferDataLength = 0;
               uint8_t* pixelBufferData;
               SoftwareBitmap bitmap = SoftwareBitmap::Convert(frame.VideoMediaFrame().SoftwareBitmap(), BitmapPixelFormat::Bgra8);
               if (bitmap != nullptr) {
                   BitmapBuffer bitmapBuffer = bitmap.LockBuffer(BitmapBufferAccessMode::Read);

                   auto spMemoryBufferByteAccess{ bitmapBuffer.CreateReference().as<::Windows::Foundation::IMemoryBufferByteAccess>() };
                   winrt::check_hresult(spMemoryBufferByteAccess->GetBuffer(&pixelBufferData, &pixelBufferDataLength));

                   std::vector<BYTE> pixelVectorData{};
                   pixelVectorData.insert(pixelVectorData.end(), std::make_move_iterator(pixelBufferData), std::make_move_iterator(pixelBufferData + pixelBufferDataLength));
                   frame_data->imageArray(pixelVectorData); //set com_array here.
                   bitmap.Close();
               }

           }
           frame.Close();
           m_frame_data_available(*this, *frame_data);
       }
   }

Sorry, I don’t know how to format it in C++. Thanks for your help.

Tautvydas-Zilys · October 27, 2020, 9:43pm

That looks reasonable although I’m not too familiar with C++/WinRT library.

Anyway, there are two ways forward: either we can debug on your side, or you can submit the bug to us and we can dig into it. Since it might take a while for us to be able to look at this, I suggest we continue debugging on your side for now.

Open up admin command prompt and enter this (replace Game.exe with the exe name for your game - not the path, just the file name):

appverif -enable Exceptions Handles Heaps Leak Locks Memory Threadpool TLS -for Game.exe

This enables Application Verifier, which is a debugging tool for finding incorrect code.

Then, run your game from Visual Studio again. With any luck, it will lead to a crash earlier, with the culprit caught red handed. Once done, don’t forget to disable it for you app again as it has a big performance impact:

appverif -disable * -for Game.exe

hein30 · October 28, 2020, 7:37am

Thanks for your quick reply. But it does not look like HoloLens can run application verifier or am I missing something?

Tautvydas-Zilys · October 28, 2020, 8:04am

Oh, can you not reproduce it on PC?

hein30 · October 28, 2020, 10:20am

No, the windows runtime component is using the sensors available on HoloLens 2. Thank you so much for your help.

chris_gsa · July 8, 2021, 9:38am

Hi, is there any update on this? Were you able to resolve the problem?

I’m running into a very similar issue with my Windows Runtime Component using Unity / HoloLens 2.

sensevividus · February 11, 2022, 6:53am

hi, I’m running into the same issue too. how did you solve this issue?

Tautvydas-Zilys · February 11, 2022, 7:42am

What exactly are you running into?

ARGs_code · February 17, 2023, 3:56pm

GC collection in GameAssembly.dll is now causing crashes in my Hololens 2 applications, as described above.

These builds worked fine as of yesterday, but after making a change to an image asset only, builds now break and throw this exception when debugging. This issue only occurs on the Hololens 2 and does not occur in the Unity Editor.

Unhandled exception at 0x00007FFE2F3114C8 (GameAssembly.dll) in RefractionProto.exe: 0xC00000FD: Stack overflow (parameters: 0x0000000000000001, 0x0000000DDE603CB0).

I do not know if this is related, but my machine recently applied a windows update and I also pulled the latest Windows10 SDKs to get everything up to date, shortly after this issue began appearing in every single build I have attempted for deployment to Hololens 2, regardless of the project.

Tautvydas-Zilys · February 17, 2023, 5:39pm

Do you have a callstack? Could it be an infinite recursion problem in your code?

ARGs_code · February 21, 2023, 4:04pm

The problem only occurs on the Hololens 2. I don’t have any infinite recursion problems in the editor or in my code as far as I can tell. The application crashes within 1 second of starting, throws no errors.

As a sanity check I built an empty scene with just the MRTK Toolkit in it and deployed it to the Hololens 2 and, I am getting the exact same issue.

Here’s the call stack: https://hastebin.com/share/apexevegay.markdown

This error is not from my code. This appears to be a Unity Script causing this. Unity.InputSystem.InputControl

ARGs_code · February 21, 2023, 9:50pm

After digging back through my build logs, I have also found the following:

Warning C4717 ‘InputOptions_set_Headers_m6A1DF761971E6AA0F44B86DBCE8CD0846F0AF063’: recursive on all control paths, function will cause runtime stack overflow Il2CppOutputProject A:\Docs\Builds\SanityCheck\Il2CppOutputProject\Source\il2cppOutput\Assembly-CSharp4.cpp 33994

Again, this appears to be a Unity Script which I have not written or touched. But I am unsure.

Tautvydas-Zilys · February 21, 2023, 10:41pm

Assembly-CSharp4.cpp suggests that this code is part of your C# scripts. Do you have a class named “InputOptions” which has a property named “Headers”?

ARGs_code · February 22, 2023, 12:40am

It turns out I do. It looks like this is part of Azure Cognitive Services Unity Text To Speech script I was passed for this project.

Pertinent parts of the script are here:

However it is still odd that this issue only appeared this week and the last time this script was changed was 288 days ago. My output format and authorization token have also not changed.

Looks like I will go figure out who sourced this on the team.

Tautvydas-Zilys · February 22, 2023, 8:00am

Commenting out that “Headers = value;” line should fix it. It doesn’t look like the getter is trying to retrieve a saved value anyway.

DevinW · March 23, 2023, 7:55pm

Ran into the same issue on my Hololens 2 project using Azure Spatial Anchors.

“Exception thrown at 0x00007FF8A2EDCF34 (GameAssembly.dll) in WLASA.exe: 0xC0000005: Access violation reading location 0x0000000000000008.”

Tautvydas-Zilys · March 29, 2023, 10:34pm

Can you report a bug on this?

KALMAN_FILTER · April 10, 2023, 2:46am

Any update on this topic ?
I tried downloading GameAssembly.dll and installed it in window/system32 but the issue found not solved.
P.S. I am debuging on Virtual Studio S2019 and will be deploying my project to Hololens2.

Topic		Replies	Views
A very odd error Unity Engine	5	1333	June 25, 2015
application crash Unity Engine Bug	1	1387	November 8, 2021
Acces Violation with build Questions & Answers legacy-topics	1	1023	March 31, 2016
Crash: d3d11.dll caused an Access Violation (0xc0000005) in module d3d11.dll at 0033:ef656f40. Unity Engine	52	91494	February 9, 2024
Access violation reading location 0x00000000 Unity Engine Windows , Platforms	2	3829	February 27, 2015

GameAssembly.dll Access violation reading location

Related topics