Debugging the NetProjectionSample

[MartinRichards23]

I'm following the NetProjectionSample example and it works as expected. However I haven't been able debug the c++ code yet, other answers to enable mixed mode debugging, but in the sample the ConsoleAppSample and SimpleMathComponent aren't even in the same solution and we really need to be able to put break points in the c++ code. I tried putting the projects in the same solution but the c++ break points are never hit.

We have a large C++/Winrt project used by our UWP app that we want to transition to WASDK, but we need to be able to debug the C++.

What do I need to do to debug the NetProjectionSample?

[manodasanW]

I tried putting the projects in the same solution but the c++ break points are never hit

Can you confirm that you do have Mixed mode debugging enabled and can you confirm that symbols for your native dll are loaded. You can check that in the modules window discussed here.

[MartinRichards23]

The option for "mixed mode" isn't there, I assume the UI was changed, but here is how it looks:

"Managed (automatic) with native" sounds like the one I want.

It looks like the issue is the symbols not loading, the Symbol load information for SimpleMathComponent.dll is:

C:\Users\marti\Downloads\CsWinRT-master\CsWinRT-master\src\Samples\NetProjectionSample\_build\x64\Debug\ConsoleAppSample\bin\SimpleMathComponent.pdb: Cannot find or open the PDB file.
C:\Users\marti\Downloads\CsWinRT-master\CsWinRT-master\src\Samples\NetProjectionSample\_build\x64\Debug\ConsoleAppSample\bin\runtimes\win-x64\native\SimpleMathComponent.pdb: Cannot find or open the PDB file.
C:\Users\marti\Downloads\CsWinRT-master\CsWinRT-master\src\Samples\NetProjectionSample\_build\x64\Release\SimpleMathComponent\bin\SimpleMathComponent\SimpleMathComponent.pdb: PDB does not match image.

This was a clean build and I'm running in debug mode.

[manodasanW]

I would expect Managed (automatic) with native to work. I have used the one couple down in the past (Managed (.NET Core / .NET 5) with native). But it does seem the symbol is not being loaded or being found which is the issue here.

Can you try going to the modules section while in the VS debugger, right clicking that SimpleMathComponent module, and clicking load symbols and point to the right location for it. For me locally when doing release, I see it automatically gets picked up from <CsWinRT>\src\Samples\NetProjectionSample\_build\x64\Release\SimpleMathComponent\bin\SimpleMathComponent\SimpleMathComponent.pdb which from the above it seems to be looking there but says it doesn't match image. So, I wonder if you rebuilt the component project after building the app project or a different version of the nuget that the build creates for the component was already restored and that is being used. Either of that can cause the pdb to not match the image.

[MartinRichards23]

I haven't been able to get it to pick up the pdb file yet. Can you confirm that it is correct to put all the projects in a single solution (the demo has them in 2 separate solutions) and then breakpoints in the c++ code should work?

[manodasanW]

It should be fine to put them in the same solution and also not do the NuGet package creation either. The sample was just to demonstrate what a component owner / projection producer would do and distribute as a NuGet and then what a consumer would do to consume it.

[MartinRichards23]

I see, that does make things a lot more simple. Is there an example of how to best set that up?