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From: "matz at suse dot de" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sources.redhat.com
Subject: [Bug libc/12561] ld.so: dlclose() can remove required local scope elements of NODELETE linkmaps
Date: Wed, 25 May 2011 15:16:00 -0000	[thread overview]
Message-ID: <bug-12561-131-MSoyGBlpjE@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-12561-131@http.sourceware.org/bugzilla/>

http://sourceware.org/bugzilla/show_bug.cgi?id=12561

--- Comment #3 from Michael Matz <matz at suse dot de> 2011-05-25 15:15:55 UTC ---
Created attachment 5749
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5749
better testcase

Indeed, this is a better testcase really reflecting what the proxy library
does.  The important part is that there needs to be two (independend)
libraries loaded, that one dependency of one of them is nodelete, and has a
finalizer that needs to lookup something in its own dependencies that wasn't
available before.  Then with unpatched glibc:

# make
# /tmp/mm/lib64/ld-linux-x86-64.so.2 --library-path /tmp/mm/lib64/ ./app
./app: symbol lookup error: /suse/matz/src/nodeletebug/lib2.so: undefined
symbol: in_lib3

with patched glibc:
# ./app
#

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  parent reply	other threads:[~2011-05-25 15:16 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-10  2:20 [Bug libc/12561] New: " pasky at suse dot cz
2011-03-22  1:41 ` [Bug libc/12561] " pasky at suse dot cz
2011-04-10 20:02 ` drepper.fsp at gmail dot com
2011-05-25 15:16 ` matz at suse dot de [this message]
2011-05-25 19:29 ` aj at suse dot de
2012-02-21  2:10 ` [Bug ld.so|libdl/12561] " jsm28 at gcc dot gnu.org
2012-03-30 14:13 ` [Bug dynamic-link/12561] " idoenmez at suse dot de
2012-10-23 17:34 ` ldv at altlinux dot org
2012-10-25 14:08 ` matz at suse dot de
2012-10-25 17:14 ` schwab@linux-m68k.org
2012-11-28 10:46 ` schwab@linux-m68k.org
2014-06-27 13:46 ` fweimer at redhat dot com

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