Fix attach to process debugging

[andyleejordan]

This is tied into "remote debugging" and we need to be sure it works.

[JustinGrote]

There is still a big issue, more about runspaces, that entering a runspace still hangs the console. This is a "big deal" showstopper for doing any kind of debugging in this environment.

[andyleejordan]

Completely agree!

[andyleejordan]

It's probably our last and biggest blocker to move the preview to stable.

[andyleejordan]

Just running the "attach process" kinda works? I mean it's broken in a lot of ways too, and I'm not sure how it's supposed to work.

[SeeminglyScience]

Attach to process definitely doesn't work.

1. Doesn't Debug-Runspace after entering the target process
2. If you do it manually, breakpoints aren't transferred
3. Trying to abort the debug session dead locks the session completely

Note, unfortunately this is a potentially quite large work item and was the most difficult piece to fix when I integrated PSRL years ago. I have also verified it does work in stable. Pretty finicky, but definitely usable.

Hopefully easier to fix with the improved architecture though 🤞

[SeeminglyScience]

We also need to test (after this is fixed) if debugging an azure function still works.

[andyleejordan]

😭 I hope it ends up being easier to fix than we think!

[andyleejordan]

Thanks @SeeminglyScience!

[JustinGrote]

Can confirm this years-long bug is finally fixed in preview. You can debug an Azure Functions worker and get repl at the console at that point.