From: Blair Zajac <blair@orcaware.com>
To: Kenneth Knowles <kknowles@berkeley.edu>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] segfault in Unix.gethostbyname
Date: Fri, 26 Mar 2004 11:00:03 -0800 [thread overview]
Message-ID: <40647DB3.39AD0635@orcaware.com> (raw)
In-Reply-To: <20040326182202.GA28843@tallman.kefka.frap.net>
Kenneth Knowles wrote:
>
> Hi all,
>
> I get a segfault from Unix.gethostbyname whenever I have wins enabled in my
> nsswitch.conf, but with wins removed everything is fine. I'm hoping someone
> with more unix/ocaml-C experience will have a clue. This was actually working a
> week ago, but I had to "flatten and reinstall" my system.
>
> $ grep wins /etc/nsswitch.conf
> hosts: files wins dns
>
> $ gdb ocamlrun
> (gdb) run /usr/local/bin/ocaml unix.cma
> Starting program: /usr/local/bin/ocamlrun /usr/local/bin/ocaml unix.cma
> Objective Caml version 3.07+2
>
> # Unix.gethostbyname "dbdev";;
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x080536c3 in string_set ()
> (gdb) bt
> #0 0x080536c3 in string_set ()
> #1 0x4034b971 in _nss_wins_gethostbyname2_r () from /lib/libnss_wins.so.2
> #2 0x403cb42c in bLoaded () from /lib/libnss_wins.so.2
> #3 0x4039bb5b in ?? () from /lib/libnss_wins.so.2
> #4 0x00000294 in ?? ()
>
> Now I can see it is some kind of string error, and it occurs in the WINS
> library, but I'm sure it traces back somehow to the ocaml String_val(..)
I believe you're running into a problem where the Samba code is binding
to the string_set symbol in Ocaml and not in the Samba library. You'll
find a string_set in Ocaml's byterun/str.c.
Probably the easiest solution is to get CVS HEAD of ocaml which has renamed
many function names to have "caml_" prepended, thus avoiding this issue.
Best,
Blair
--
Blair Zajac <blair@orcaware.com>
Plots of your system's performance - http://www.orcaware.com/orca/
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next prev parent reply other threads:[~2004-03-26 19:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-26 18:22 Kenneth Knowles
2004-03-26 18:30 ` Thomas Fischbacher
2004-03-26 19:24 ` Kenneth Knowles
2004-03-26 19:00 ` Blair Zajac [this message]
2004-03-26 19:27 ` Kenneth Knowles
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