From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-448107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 10627 invoked by alias); 2 Apr 2014 09:00:41 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 10572 invoked by uid 48); 2 Apr 2014 09:00:37 -0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60731] [4.7/4.8/4.9 Regression] dynamic library not getting reinitialized on multiple calls to dlopen()
Date: Wed, 02 Apr 2014 09:00:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: unknown
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.7.4
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_status cf_reconfirmed_on cf_known_to_work target_milestone short_desc everconfirmed cf_known_to_fail
Message-ID: <bug-60731-4-RRAO9HY3HJ@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-60731-4@http.gcc.gnu.org/bugzilla/>
References: <bug-60731-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-04/txt/msg00127.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60731

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-04-02
      Known to work|                            |4.4.7
   Target Milestone|---                         |4.7.4
            Summary|dynamic library not getting |[4.7/4.8/4.9 Regression]
                   |reinitialized on multiple   |dynamic library not getting
                   |calls to dlopen()           |reinitialized on multiple
                   |                            |calls to dlopen()
     Ever confirmed|0                           |1
      Known to fail|                            |4.5.4, 4.8.2, 4.9.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Works up to GCC 4.4, fails since GCC 4.5.  It's not clear what makes the
difference here.

Btw, with LD_DEBUG=all I see


     10389:     opening file=./static.so [0]; direct_opencount=2
     10389:
     10389:     symbol=routine;  lookup in file=./static.so [0]
     10389:     binding file ./static.so [0] to ./static.so [0]: normal symbol
`routine'
count:2

     10389:     opening file=./static.so [0]; direct_opencount=3
     10389:
     10389:     symbol=routine;  lookup in file=./static.so [0]
     10389:     binding file ./static.so [0] to ./static.so [0]: normal symbol
`routine'
count:3

so the dlclose call does nothing.  While in the working case:

     10438:
     10438:     file=./static.so [0];  dynamically loaded by ./test_static [0]
     10438:     file=./static.so [0];  generating link map
     10438:       dynamic: 0x00007ffff6ffede0  base: 0x00007ffff6dfd000   size:
0x00000000002020a8
     10438:         entry: 0x00007ffff6dfdb10  phdr: 0x00007ffff6dfd040  phnum:
                 7
....
     10438:     calling init: ./static.so
     10438:
     10438:     opening file=./static.so [0]; direct_opencount=1
     10438:
     10438:     symbol=routine;  lookup in file=./static.so [0]
     10438:     binding file ./static.so [0] to ./static.so [0]: normal symbol
`routine'
count:1
     10438:
     10438:     calling fini: ./static.so [0]
     10438:
     10438:
     10438:     file=./static.so [0];  destroying link map