706727 - Add some lock glue to prefixSignatureRegEx

Status: RESOLVED WONTFIX

(Socorro :: Infra, task)

Description

[Andrew McCreight [:mccr8]]

Please add the following items to prefixSignatureRegEx:

PR_WaitCondVar
mozilla::CondVar::Wait

The hang detector often triggers when the main thread is sitting in a CondVar, so adding these two items will help distinguish stacks.

For instance, in this case we'd want to see nsCycleCollectorRunner::Collect:
https://crash-stats.mozilla.com/report/index/c6fc5d76-ad79-449b-830d-a7e4b2111128

In this one, I think we'd end up in IPC glue, but I'm not really familiar enough with that part of the code to know whether it is useful or not:
https://crash-stats.mozilla.com/report/index/2d74ccba-0e1f-4d8b-9029-29dbb2111128

Comment 1

[Robert Kaiser]

Andrew, given that the hang detector probably won't be turned on this way again and we're going through telemetry for chrome hang reporting, do we still want/need this?

Comment 2

[Andrew McCreight [:mccr8]]

Probably not.