Date: Sat, 04 Oct 2008 18:12:44 -0600 From: Dale Hagglund <dale.hagglund@gmail.com> To: freebsd-questions@freebsd.org Subject: processes hanging in _umtx_op Message-ID: <86r66v6gsj.fsf@ponoka.ab.hsia.telus.net>
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While experimenting with gnuradio and latest packages for
openoffice.org-3, I've run across a situation where a process hangs in
the _umtx_op system call. The process can't be interrupted with SIGINT,
but SIGQUIT kills it and generates a core dump.
I can reproduce this reliably with
$ python -c "import wx"
I'm running 7.0-RELEASE-p2 with "uname -a" giving the following output,
suitably wrapped.
FreeBSD ponoka.ab.hsia.telus.net
7.0-RELEASE-p2 FreeBSD 7.0-RELEASE-p2
#0: Wed Jun 18 07:33:20 UTC 2008
root@i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
i386
I won't be at all surprised if this is some strange library
compatibility problem I've introduced over time, but I'm at a loss as to
how to track the problem further. I've attached the final few lines of
the kdump output from the command above, and I can provide my current
list of packages if necessary.
Any advice or suggestions would be appreciated.
Dale Hagglund
------------------------- start: kdump output -------------------------
34453 python 1223164746.661828 CALL munmap(0x2aa00000,0xc1000)
34453 python 1223164746.661840 RET munmap 0
34453 python 1223164746.662541 CALL _umtx_op(0x283071e0,0x8,0x1,0x283071c0,0
)
34453 python 1223164752.019372 RET _umtx_op -1 errno 4 Interrupted system c
all
34453 python 1223164752.019433 PSIG SIGINT caught handler=0x80d8020 mask=0x0
code=0x0
34453 python 1223164752.019454 CALL getpid
34453 python 1223164752.019460 RET getpid 34453/0x8695
34453 python 1223164752.019471 CALL sigaction(SIGINT,0xbfbfaf3c,0xbfbfaf24)
34453 python 1223164752.019480 RET sigaction 0
34453 python 1223164752.019487 CALL sigreturn(0xbfbfafa0)
34453 python 1223164752.019497 RET sigreturn JUSTRETURN
34453 python 1223164752.019511 CALL _umtx_op(0x283071e0,0x8,0x1,0x283071c0,0
)
34453 python 1223164752.856485 RET _umtx_op -1 errno 4 Interrupted system c
all
34453 python 1223164752.856550 PSIG SIGINT caught handler=0x80d8020 mask=0x0
code=0x0
34453 python 1223164752.856571 CALL getpid
34453 python 1223164752.856577 RET getpid 34453/0x8695
34453 python 1223164752.856587 CALL sigaction(SIGINT,0xbfbfaf3c,0xbfbfaf24)
34453 python 1223164752.856597 RET sigaction 0
34453 python 1223164752.856604 CALL sigreturn(0xbfbfafa0)
34453 python 1223164752.856613 RET sigreturn JUSTRETURN
34453 python 1223164752.856628 CALL _umtx_op(0x283071e0,0x8,0x1,0x283071c0,0
)
34453 python 1223164753.425922 RET _umtx_op -1 errno 4 Interrupted system c
all
34453 python 1223164753.425984 PSIG SIGQUIT SIG_DFL
34453 python 1223164753.425997 NAMI "python.core"
------------------------- end: kdump output -------------------------
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