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* Re: c++/7400: segfault with -shared option
@ 2002-10-30 15:46 Wolfgang Bangerth
0 siblings, 0 replies; 5+ messages in thread
From: Wolfgang Bangerth @ 2002-10-30 15:46 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/7400; it has been noted by GNATS.
From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: Michael Matz <matz@suse.de>
Cc: gcc-bugs@gcc.gnu.org, <gcc-prs@gcc.gnu.org>, <nobody@gcc.gnu.org>,
<t6@pobox.com>, <gcc-gnats@gcc.gnu.org>
Subject: Re: c++/7400: segfault with -shared option
Date: Wed, 30 Oct 2002 17:38:32 -0600 (CST)
> > ------------------------------
> > int main () {};
> > ------------------------------
> >
> > Here's what I get:
> > tmp/g> c++ -shared x.cc
> > tmp/g> ./a.out
> > Speicherzugriffsfehler
>
> Huh? With -shared you create a shared library. You can't run a shared
> lib. So getting a SEGV isn't wrong.
Very fair criticism. I was just confused that I could execute the library,
and that I could also open it in gdb like a program.
Thanks for lifting the bar from in front of my head :-) I'll close the
report in a second.
Regards
Wolfgang
-------------------------------------------------------------------------
Wolfgang Bangerth email: bangerth@ticam.utexas.edu
www: http://www.ticam.utexas.edu/~bangerth
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: c++/7400: segfault with -shared option
@ 2002-10-31 7:16 David Jung
0 siblings, 0 replies; 5+ messages in thread
From: David Jung @ 2002-10-31 7:16 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/7400; it has been noted by GNATS.
From: David Jung <jungdl@ornl.gov>
To: gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org,
nobody@gcc.gnu.org, t6@pobox.com
Cc:
Subject: Re: c++/7400: segfault with -shared option
Date: 31 Oct 2002 10:18:46 -0500
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view audit-trail
Michael Matz <matz@suse.de> wrote:
> Huh? With -shared you create a shared library. You can't run a shared
> lib. So getting a SEGV isn't wrong.
Yep. You're right. My original problem was not in trying to
run a shared lib, but in my effort to reduce the problem report
to the minimum reproducible code, I obviously got a bit
overzealous. Sorry about that.
I don't know if my original problem is fixed in 3.2, as the code
was redesigned to eliminate the dynamic_casts that were causing
the problem.
So I guess you can close it. If I come across it again I'll reopen
or post another report.
Thanks.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: c++/7400: segfault with -shared option
@ 2002-10-30 15:35 bangerth
0 siblings, 0 replies; 5+ messages in thread
From: bangerth @ 2002-10-30 15:35 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, t6
Synopsis: segfault with -shared option
State-Changed-From-To: analyzed->closed
State-Changed-By: bangerth
State-Changed-When: Wed Oct 30 15:35:57 2002
State-Changed-Why:
Michael's right, of course. How stupid...
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7400
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: c++/7400: segfault with -shared option
@ 2002-10-30 15:26 Michael Matz
0 siblings, 0 replies; 5+ messages in thread
From: Michael Matz @ 2002-10-30 15:26 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/7400; it has been noted by GNATS.
From: Michael Matz <matz@suse.de>
To: <bangerth@dealii.org>, <gcc-bugs@gcc.gnu.org>,
<gcc-prs@gcc.gnu.org>, <nobody@gcc.gnu.org>, <t6@pobox.com>,
<gcc-gnats@gcc.gnu.org>
Cc:
Subject: Re: c++/7400: segfault with -shared option
Date: Thu, 31 Oct 2002 00:17:18 +0100 (CET)
Hi,
On 30 Oct 2002 bangerth@dealii.org wrote:
> I see the same behavior, although it has nothing to do with
> dynamic_cast as suggested in the previous name of the
> report: this also happens with this code:
> ------------------------------
> int main () {};
> ------------------------------
>
> Here's what I get:
> tmp/g> c++ x.cc
> tmp/g> ./a.out
> tmp/g>
> tmp/g> c++ -shared x.cc
> tmp/g> ./a.out
> Speicherzugriffsfehler
> (which means "Segmentation Fault", I just have not found
> out how to change the stupid german defaults on my system.)
Huh? With -shared you create a shared library. You can't run a shared
lib. So getting a SEGV isn't wrong.
Ciao,
Michael.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: c++/7400: segfault with -shared option
@ 2002-10-30 15:03 bangerth
0 siblings, 0 replies; 5+ messages in thread
From: bangerth @ 2002-10-30 15:03 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, t6
Old Synopsis: dynamic_cast segfaults with -shared option
New Synopsis: segfault with -shared option
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Wed Oct 30 15:03:03 2002
State-Changed-Why:
I see the same behavior, although it has nothing to do with
dynamic_cast as suggested in the previous name of the
report: this also happens with this code:
------------------------------
int main () {};
------------------------------
Here's what I get:
tmp/g> c++ x.cc
tmp/g> ./a.out
tmp/g>
tmp/g> c++ -shared x.cc
tmp/g> ./a.out
Speicherzugriffsfehler
(which means "Segmentation Fault", I just have not found
out how to change the stupid german defaults on my system.)
I guess I must be making something very naive, but then
I don't see it, and this happens with 2.95, 3.2 and present
CVS... :-(
(And no, I don't have any idea why I can compile all my
program with this option and why it runs. Also, the
problem does not go away if I use -fPIC, or if I link
separately. The crash happens before we get into "main",
by the way, and we don't get a meaningful backtrace. Please
someone enlighten me...)
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7400
^ permalink raw reply [flat|nested] 5+ messages in thread
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2002-10-30 15:46 c++/7400: segfault with -shared option Wolfgang Bangerth
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2002-10-31 7:16 David Jung
2002-10-30 15:35 bangerth
2002-10-30 15:26 Michael Matz
2002-10-30 15:03 bangerth
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