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List:       evms-devel
Subject:    [Evms-devel] Re: Bug#235328: evms unaligned trap
From:       Matt Zimmerman <mdz () debian ! org>
Date:       2004-02-28 21:37:57
Message-ID: 20040228213756.GA20928 () alcor ! net
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On Sat, Feb 28, 2004 at 07:44:06PM +0100, Jure Pe??ar wrote:

> I'm playing with evms on my Alphaserver with a bunch of disks. First problem
> i found is i evmsgui. Clicking on Action -> Create -> Region reliably
> crashes the gui everytime. Kernel log shows:
> 
> Feb 28 12:06:30 alphabox kernel: evmsgui(464): unaligned trap at
> 0000020000801a5c: 000002000111d704 2d 1
> 
> Gdb shows:
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 16386 (LWP 538)]
> 0x0000020000801a38 in BlindExtractObject () from /lib/libdlist-2.0.so.0
> (gdb) bt
> #0  0x0000020000801a38 in BlindExtractObject () from /lib/libdlist-2.0.so.0
> #1  0x00000200013a18dc in ?? () from /lib/evms/md-1.1.9.so
> #2  0x00000200013a23ec in ?? () from /lib/evms/md-1.1.9.so
> #3  0x000002000007c5a8 in evms_create_task () from /lib/libevms-2.2.so.0
> #4  0x0000000120054f80 in can_plugin_do_action ()
> #5  0x000000012003f5fc in on_plugin_selection_clist_realize ()
> #6  0x0000000120043650 in on_region_manager_clist_realize ()
> #7  0x00000200001cbc44 in gtk_marshal_NONE__NONE () from
> #/usr/lib/libgtk-1.2.so.0 8  0x00000200002340a4 in
> #gtk_signal_remove_emission_hook () from /usr/lib/libgtk-1.2.so.0 9 
> #0x0000000120163d08 in ?? ()
> warning: Hit heuristic-fence-post without finding
> warning: enclosing function for address 0x120163d08
> This warning occurs if you are debugging a function without any symbols
> (for example, in a stripped executable).  In that case, you may wish to
> increase the size of the search with the `set heuristic-fence-post' command.
> 
> Same happens with evmsn (and i suspect cli too, but didnt test it), so the
> problem is not the gui itself but one of the underlying libraries. Libdlist
> looks like the one to blame from that gdb output.

libdlist just implements a data structure; I imagine the bug is probably
higher up.  Do you think you could rebuild evms with debugging support and
get a full stack trace?

apt-get build-dep evms
DEB_BUILD_OPTIONS=nostrip apt-get source -b evms

-- 
 - mdz


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