GetContextAsync Exceptions on ARM

[Tratcher]

When running on Win 10 IoT with ARM CoreCLR we often get the following error:

error   : [Microsoft.Net.Http.Server.WebListener] GetContextAsync
Microsoft.Net.Http.Server.WebListenerException: Invalid access to memory location
   at Microsoft.Net.Http.Server.WebListener.GetContextAsync()
error   : [Microsoft.AspNet.Server.WebListener.MessagePump] ListenForNextRequestAsync
Microsoft.Net.Http.Server.WebListenerException: Invalid access to memory location
   at Microsoft.Net.Http.Server.WebListener.GetContextAsync()
   at Microsoft.AspNet.Server.WebListener.MessagePump.<ProcessRequestsWorker>d__18.MoveNext()

This looks similar to: http://blogs.msdn.com/b/cie/archive/2013/10/31/compute-emulator-invalid-access-to-memory-location.aspx

[Tratcher]

Possibly related: aspnet/dnx#2063

[munyirik]

Any update on this? I'm trying to use WebListener on my Raspberry Pi 2 and hit this issue.

[moozzyk]

@muratg - this may need to be retriaged.

[muratg]

Let's reconsider this in 1.0.0 since UWP apps can now use http.sys to server web requests.

[munyirik]

Thanks. What's the timeline for 1.0.0?

[moozzyk]

The issue here is that HttpReceiveHttpRequest expects the buffer to be 8-byte aligned but on ARM the buffer is 4-byte aligned and when falls on the 4 byte boundary HttpReceiveHttpRequest returns ERROR_NOACCESS which is then converted to the "Invalid access to memory location" exception.

[moozzyk]

Fixed in f63e53b