Produce a helpful error message if `ptrace_scope` is 0

[peytondmurray]

Is there an existing proposal for this?

• I have searched the existing proposals

Is your feature request related to a problem?

If a user tries to run the integration tests, they can hang indefinitely if

cat /proc/sys/kernel/yama/ptrace_scope

prints 1.

Describe the solution you'd like

I'd love if pystack generated an error message with a solution instead of hanging indefinitely. You can fix this by doing

sudo bash -c 'echo 0 >> /proc/sys/kernel/yama/ptrace_scope'

It would be nice to do this check before running tests in conftest.py so that folks know they need to deal with this before spending time on it.

Alternatives you considered

No response