840182 - Need to detect when app crashes/freezes when running marionette tests

Status: RESOLVED FIXED

(Remote Protocol :: Marionette, defect)

Description

[Malini Das [:mdas] - Away, not checking bugmail]

When running tests against gaia in b2g, apps can either crash or hang, and we're stuck sending back ScriptTimeout or other unhelpful messages. It would be great if we could detect a hang/crash and then restart b2g in that case.

I spoke with cjones, and for detecting crashes, we can look for dumps in /data/b2g/mozilla/Crash Reports/, and /data/b2g/mozilla/Crash Reports/pending for pending crash logs, but jgriffin has seen that crashes don't always leave crash logs. Cjones also mentioned that we could listen for mozbrowsererror events, where crashes fall under 'fatal' errors.

As for freezes, there isn't any clear way to do that, but cjones suggests hiding the frame (setVisible(false)), then add a nextpaint listener and unhide it. We can try this approach and see if it works.

Comment 1

[Jonathan Griffin (:jgriffin)]

We do have this capability now in general; we can file bugs for more specific problems as needed.