Date: Wed, 23 Sep 1998 09:17:39 -0700 (PDT) From: David Wolfskill <dhw@whistle.com> To: FreeBSD-Questions@FreeBSD.ORG, jfrodo42@hotmail.com Subject: Re: Core dumps on signal 10 (SIGBUS?) Message-ID: <199809231617.JAA05395@pau-amma.whistle.com> In-Reply-To: <19980922235852.23883.qmail@hotmail.com>
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>From: "Jane Frodo" <jfrodo42@hotmail.com> >Date: Tue, 22 Sep 1998 16:58:51 PDT > I have a user who gets a core dump every two hours or so (the >application runs around the clock). The message in the messages >file is: >Sep 21 09:06:47 smaug /kernel: pid 22786 (smaug), uid 1321: exited on >signal 10 (core dumped) >Of course, every once in a great while it will get bored with signal 10, >and die on signal 11 (segfault). I'm not particularly worried about >the segfault, and I doubt that the segfaults are related,so I just >need to know what on earth can cause a signal 10? And am I >correct that signal 10 is "SIGBUS" (I looked in >/usr/include/sys/signal.h for this definition)? My understanding is that either symptom is a result of an attempt to access memory that was either never allocated or had been free()d before the attempted access. In either case, I would consider this a bug in the application (unless it's demonstrated to be at a lower level, such as the system libraries, in which case it's definitely a bug that needs to be fixed). gdb may be useful to get a "backtrace" to see where the error occurred. david -- David Wolfskill UNIX System Administrator dhw@whistle.com voice: (650) 577-7158 pager: (650) 371-4621 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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