From: Kenneth Knowles <kknowles@berkeley.edu>
To: Blair Zajac <blair@orcaware.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] segfault in Unix.gethostbyname
Date: Fri, 26 Mar 2004 11:27:07 -0800 [thread overview]
Message-ID: <20040326192707.GB18128@tallman.kefka.frap.net> (raw)
In-Reply-To: <40647DB3.39AD0635@orcaware.com>
Aha, I remember that discussion. Before my reinstall I had the CVS of ocaml,
and this time I'm using a release. I didn't realize that fix wasn't in the new
releases (have been using CVS version for a long time).
Thanks a bunch.
Kenn
On Fri, Mar 26, 2004 at 11:00:03AM -0800, Blair Zajac wrote:
> 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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prev parent reply other threads:[~2004-03-26 19:27 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
2004-03-26 19:27 ` Kenneth Knowles [this message]
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