print backtrace on crash?

[kevinushey]

I put together a small experiment using gdb to print a backtrace when the process crashes. The core implementation lives here:

https://github.com/kevinushey/mortem/blob/main/src/mortem.c

I wonder if winch could consider doing something similar; that is, register some signal handlers for fatal / deadly signals, and then use winch / libbacktrace to print a stack trace when that crash occurs?

This could be especially useful in debugging CI crashes.

[krlmlr]

Thanks, missed that.

How do we register the signal handlers? Should we export a function that enables/disables this feature?

Would you like to send a PR?