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From: "jakub at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/42679] RTLD_DEEPBIND dlopen option for shared library that uses libstdc++ std::ostream crashes
Date: Thu, 28 Jan 2010 22:07:00 -0000	[thread overview]
Message-ID: <20100128220714.9527.qmail@sourceware.org> (raw)
In-Reply-To: <bug-42679-13845@http.gcc.gnu.org/bugzilla/>



------- Comment #9 from jakub at gcc dot gnu dot org  2010-01-28 22:07 -------
The theoretical example is libstdc++ defining some object where things
misbehave if it is not the only one (say foo) and some other library has that
object as well.  When that other library isn't an direct or indirect dependency
of the executable, but libstdc++ is, in all libraries loaded before start of
the program foo resolves to the libstdc++ copy.  When you dlopen RTLD_DEEPBIND
this other library, foo in it and all its dependencies will resolve to the
other library, as it comes earlier in the search scope, before global scope.
I guess LD_DEBUG=all could shed some light into what exactly is going on, it
could be the empty string, or something similar.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42679


  parent reply	other threads:[~2010-01-28 22:07 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-10  7:26 [Bug libstdc++/42679] New: " mjtruog at fastmail dot ca
2010-01-10 10:42 ` [Bug libstdc++/42679] " paolo dot carlini at oracle dot com
2010-01-10 18:16 ` mjtruog at fastmail dot ca
2010-01-10 19:18 ` paolo dot carlini at oracle dot com
2010-01-12 15:52 ` paolo dot carlini at oracle dot com
2010-01-22  7:10 ` mjtruog at fastmail dot ca
2010-01-28  3:10 ` paolo dot carlini at oracle dot com
2010-01-28  8:03 ` jakub at gcc dot gnu dot org
2010-01-28  9:50 ` paolo dot carlini at oracle dot com
2010-01-28 20:01 ` jason at gcc dot gnu dot org
2010-01-28 22:07 ` jakub at gcc dot gnu dot org [this message]
2010-01-28 22:35 ` paolo dot carlini at oracle dot com
2010-01-28 22:50 ` jakub at gcc dot gnu dot org
2010-01-28 23:00 ` paolo dot carlini at oracle dot com
2010-01-29  0:47 ` paolo dot carlini at oracle dot com
2010-01-29  7:52 ` jakub at gcc dot gnu dot org
2010-01-29 10:08 ` paolo dot carlini at oracle dot com
2010-01-29 17:05 ` mjtruog at fastmail dot ca
2010-03-07 17:53 ` mjtruog at fastmail dot ca
     [not found] <bug-42679-4@http.gcc.gnu.org/bugzilla/>
2010-12-29  6:25 ` liguanglei at gmail dot com
2010-12-29 23:51 ` redi at gcc dot gnu.org
2013-01-02  1:41 ` gauryogesh.nsit at gmail dot com
2013-01-04 10:58 ` redi at gcc dot gnu.org
2013-02-05 23:47 ` mjtruog at fastmail dot ca
2021-10-15 13:29 ` jeanmichael.celerier at gmail dot com
2021-10-15 13:35 ` jeanmichael.celerier at gmail dot com

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