New submission from Charles-François Natali <neolo...@free.fr>: As noted in issue #11870, making faulthandler capable of dumping child processes' tracebacks could be a great aid in debugging tricky deadlocks involving for example multiprocessing and subprocess. Since there's no portable way to find out child processes, a possible idea would be to make the handler send a signal to its process group if the current process is the process group leader. Advantages: - simple - async-safe Drawbacks: - since all the processes receive the signal at the same time, their outputs will be interleaved (we could maybe add a random sleep before dumping the traceback?) - children not part of the same process group (for example those who called setsid() or setpgrp()) won't be handled
I'm not sure how this would work out on Windows, but I don't event know if Windows has a notion of child processes or process groups... ---------- components: Library (Lib) messages: 139132 nosy: haypo, neologix priority: normal severity: normal stage: needs patch status: open title: make faulthandler dump traceback of child processes type: feature request _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue12413> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
