Date: Thu, 21 Oct 2004 18:47:43 -0700 From: Sam Leffler <sam@errno.com> To: Robert Watson <rwatson@freebsd.org> Cc: threads@freebsd.org Subject: Re: [kde-freebsd] unkillable multithreaded processes stuck in `STOP' state Message-ID: <417866BF.1000200@errno.com> In-Reply-To: <Pine.NEB.3.96L.1041021163000.10079Q-100000@fledge.watson.org> References: <Pine.NEB.3.96L.1041021163000.10079Q-100000@fledge.watson.org>
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Robert Watson wrote: > On Thu, 21 Oct 2004, Michael Nottebrock wrote: > > >>On Thursday, 21. October 2004 21:23, Mikhail Teterin wrote: >> >>>Hello! >>> >>>This happened twice already -- first with KMail and now with Kontact. >>>A process crashes as usual (KDE's 3.3.0 release was of unusually low >>>quality), and seems to go away, except it does not. It stays in the >>>`STOP' (according to top(1)) or in the `T' (as per ps(1)) state and >>>can not be killed -- neither with -CONT, nor with -KILL. >> >>[...] >> >> >>>This is all, probably, due to something in KDE's attempts to capture >>>crashes and collect backtraces for better bug reports. But whatever bugs >>>they may have there, having an unkillable process -- of any kind -- worries >>>me greatly. Is this a known issue, or is a PR warranted? >> >>There have been no similar reports (to my knowledge) and I haven't seen >>anything similar on either 4.x or 5.x (I don't run 6-CURRENT). > > > Actually, I recall seeing a similar problem about 14 months ago on > 5-CURRENT. I believe that when a program crashed, its SIGSEGV handler > would fork and attach gdb to its parent in order to generate a stack > trace. I didn't have the opportunity to try and track it down, but I also > don't remember seeing it in the last six months. It could be because KDE > programs crash less for me as opposed to that the bug leading to the wedge > has been fixed. On my recent -current laptop (updated last week) I can reliably run gdb on a program, break main, and quit. The process being debugged is left in STOP state and is unkillable. Sam
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