[3865] in arla-drinkers
Re: Arla 0.42-RC2
daemon@ATHENA.MIT.EDU (Jeffrey Hutzelman)
Wed Apr 5 11:20:16 2006
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Wed, 5 Apr 2006 11:19:58 -0400 (EDT)
Date: Wed, 05 Apr 2006 11:19:49 -0400
From: Jeffrey Hutzelman <jhutz@cmu.edu>
To: =?ISO-8859-1?Q?Niels_M=F6ller?= <nisse@lysator.liu.se>,
Tomas Olsson <tol@stacken.kth.se>
Subject: Re: Arla 0.42-RC2
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On Wednesday, April 05, 2006 05:06:58 PM +0200 Niels M=F6ller =
<nisse@lysator.liu.se> wrote:
> nisse@lysator.liu.se (Niels M=F6ller) writes:
>
>> It's puzzling. I also tried strace -f arlad -n, which says:
>>
>> 5357 open("/lib/libgcc_s.so.1", O_RDONLY) =3D -1 ENOENT (No such file
>> or directory) 5357 open("/usr/lib/i686/cmov/libgcc_s.so.1", O_RDONLY)
>> =3D -1 ENOENT (No such file or directory) 5357
>> open("/usr/lib/i686/libgcc_s.so.1", O_RDONLY) =3D -1 ENOENT (No such
>> file or directory) 5357 open("/usr/lib/libgcc_s.so.1", O_RDONLY) =3D =
-1
>> ENOENT (No such file or directory) 5357 write(2, "libgcc_s.so.1 must
>> be installed "..., 59) =3D 59 5357 exit_group(127) =
=3D ?
>>
>> The file /lib/libgcc_s.so.1 exists and is readable, so I really don't
>> understand why open returns ENOENT.
>
> ceder helped me spot the "obvious" problem. Earlier in the strace
> output:
>
> 5332 chroot("/usr/arla/cache") =3D 0
>
> So here we have the problem: pthread_cancel wants to use dlopen to
> load libgcc_s.so.1. But by the time it calls dlopen, this file is
> hidden by chroot.
>
> I'm tempted to say it's a bug in glibc to depend on dlopen like this,
> and I wouldn't be surprised if this behaviour is not POSIX-compliant.
>
> Is there any way to force the loading of libgcc earlier? Or how to
> work around this?
You could try linking arlad against libgcc explicitly.
You could also use LD_PRELOAD to get it loaded early.
-- Jeff
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