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* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-02-04 22:40 bangerth
0 siblings, 0 replies; 12+ messages in thread
From: bangerth @ 2003-02-04 22:40 UTC (permalink / raw)
To: cc, gcc-bugs, gcc-prs, nobody, rschiele
Synopsis: exception handling faulty wenn linking PIC objects to non PIC ones
State-Changed-From-To: feedback->closed
State-Changed-By: bangerth
State-Changed-When: Tue Feb 4 22:40:19 2003
State-Changed-Why:
Submitter states that the problem is apparently SuSE
specific and that he will discuss the matter with them.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9265
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-02-06 9:46 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-02-06 9:46 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Jakub Jelinek <jakub@redhat.com>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org, Andreas Jaeger <aj@suse.de>,
Andreas Schwab <schwab@suse.de>
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Thu, 6 Feb 2003 10:44:10 +0100
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On Tue, Feb 04, 2003 at 11:28:27PM +0100, Robert Schiele wrote:
> Now, after I had the first report from someone with recent binutils
> where it was not reproducable, I did some further research and found
> that it seems to be a SuSE specific problem either with the shipped
> glibc or with some vendor patches on binutils.
Ok, it is definitively not a gcc bug, but a binutils bug, but not
invented by SuSE specific patches, but by the fact that they configure
with --enable-targets=3Dx86_64-suse-linux. This seems to break either
ld or libbfd, even on plain binutils 2.12.90.0.15. I haven't yet
tried later releases, but will do so.
If you are interrested in having more information, feel free to
contact me.
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-02-04 22:36 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-02-04 22:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Jakub Jelinek <jakub@redhat.com>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org, Andreas Jaeger <aj@suse.de>
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 4 Feb 2003 23:28:27 +0100
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On Tue, Feb 04, 2003 at 03:19:06PM -0500, Jakub Jelinek wrote:
> Cannot reproduce this, works just fine with
> gcc version 3.2.1 20021207 (Red Hat Linux 8.0 3.2.1-2)
> GNU ld version 2.13.90.0.16 20021126
Thanks for checking this.
> You obviously cannot mix crt* files between different gcc builds,
This is perfectly clear to me. I did this only to track the problem
down.
Now, after I had the first report from someone with recent binutils
where it was not reproducable, I did some further research and found
that it seems to be a SuSE specific problem either with the shipped
glibc or with some vendor patches on binutils.
I compared SuSE 8.1 to Mandrake 9.0 that have both gcc-3.2,
binutils-2.12.90.0.15 and glibc-2.2.5. SuSE has the bug, Mandrake
not. So the problem seems to have been introduced by a SuSE specific
change to either binutils or glibc.
Andreas: This is the reason, why I have put you in CC again.
So, from my point of view, we can close this bug here and I will do
further discussions about this issue in the SuSE bugzilla.
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-02-04 20:26 Jakub Jelinek
0 siblings, 0 replies; 12+ messages in thread
From: Jakub Jelinek @ 2003-02-04 20:26 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Jakub Jelinek <jakub@redhat.com>
To: Robert Schiele <rschiele@uni-mannheim.de>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 4 Feb 2003 15:19:06 -0500
On Tue, Feb 04, 2003 at 08:43:55PM +0100, Robert Schiele wrote:
> On Tue, Jan 14, 2003 at 11:37:22PM +0100, Robert Schiele wrote:
> > Hello Jakub.
>
> Hello, did you miss my last message? Could you give a comment on the
> issue, or at least state that you can't/won't for any reason?
>
> > As you did some of the recent changes related to .eh_frame_hdr stuff
> > in crtstuff, I expect you to be able to give some comments on c++/9265
> > or at least can name a person that should have an idea what the
> > problem could be.
Cannot reproduce this, works just fine with
gcc version 3.2.1 20021207 (Red Hat Linux 8.0 3.2.1-2)
GNU ld version 2.13.90.0.16 20021126
You obviously cannot mix crt* files between different gcc builds,
particularly you should never use crt* files from gcc build
which has
#define HAVE_LD_EH_FRAME_HDR 1
in auto-host.h
in gcc which does not have it.
gcc which has the above defined during configure will have:
%{!static:--eh-frame-hdr}
in specs and thus ensure PT_GNU_EH_FRAME is created:
readelf -l a.out
Elf file type is EXEC (Executable file)
Entry point 0x80484ac
There are 7 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
PHDR 0x000034 0x08048034 0x08048034 0x000e0 0x000e0 R E 0x4
INTERP 0x000114 0x08048114 0x08048114 0x00013 0x00013 R 0x1
[Requesting program interpreter: /lib/ld-linux.so.2]
LOAD 0x000000 0x08048000 0x08048000 0x00734 0x00734 R E 0x1000
LOAD 0x000734 0x08049734 0x08049734 0x00130 0x00138 RW 0x1000
DYNAMIC 0x000744 0x08049744 0x08049744 0x000e0 0x000e0 RW 0x4
NOTE 0x000128 0x08048128 0x08048128 0x00020 0x00020 R 0x4
GNU_EH_FRAME 0x000678 0x08048678 0x08048678 0x0001c 0x0001c R 0x4
Jakub
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-02-04 19:46 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-02-04 19:46 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Jakub Jelinek <jakub@redhat.com>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 4 Feb 2003 20:43:55 +0100
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On Tue, Jan 14, 2003 at 11:37:22PM +0100, Robert Schiele wrote:
> Hello Jakub.
Hello, did you miss my last message? Could you give a comment on the
issue, or at least state that you can't/won't for any reason?
> As you did some of the recent changes related to .eh_frame_hdr stuff
> in crtstuff, I expect you to be able to give some comments on c++/9265
> or at least can name a person that should have an idea what the
> problem could be.
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-14 22:46 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-01-14 22:46 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Jakub Jelinek <jakub@redhat.com>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 14 Jan 2003 23:37:22 +0100
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Hello Jakub.
As you did some of the recent changes related to .eh_frame_hdr stuff
in crtstuff, I expect you to be able to give some comments on c++/9265
or at least can name a person that should have an idea what the
problem could be.
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-14 9:06 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-01-14 9:06 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org, Andreas Jaeger <aj@suse.de>
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 14 Jan 2003 10:05:00 +0100
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On Tue, Jan 14, 2003 at 08:03:01AM +0100, Robert Schiele wrote:
> Thanks. With your crtbegin.o it also works for me. So I will try to
> build a gcc 3.2 with binutils 2.12.x.x.x to check whether it makes a
> difference which binutils are used to build the compiler.
Well, I got the switch that triggers it: HAVE_LD_EH_FRAME_HDR
If this Macro was defined, the crtbegin code cannot handle the
situation I described in the bug report. Without it can handle the
situation quite sane. This is the case with _all_ compilers since 3.2
release. (I haven't an older one at hand to test.)
Obviously this switched is on if you used binutils 2.12.x.x.x at
configure time as they support this feature, but 2.11.x.x.x do not and
such it is turned off there. So it is perfectly clear now, why you
couldn't reproduce the problem.
This means the problem obviously is in the crtstuff code that handles
eh_frame_hdr stuff.
So we need some binutils gurus here.
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-14 7:06 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-01-14 7:06 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org, Andreas Jaeger <aj@suse.de>
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 14 Jan 2003 08:03:01 +0100
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On Mon, Jan 13, 2003 at 05:36:53PM -0600, Wolfgang Bangerth wrote:
>=20
> > Wolfgang could you send me the crtbegin.o files from the compilers
> > that you tried?
>=20
> Attached is the crtbegin.o from the gcc3.2.2 snapshot (2002-12-13) I use,=
=20
> compiled on the SuSE machine. This should be closest to your=20
> configuration.
Thanks. With your crtbegin.o it also works for me. So I will try to
build a gcc 3.2 with binutils 2.12.x.x.x to check whether it makes a
difference which binutils are used to build the compiler.
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-13 23:46 Wolfgang Bangerth
0 siblings, 0 replies; 12+ messages in thread
From: Wolfgang Bangerth @ 2003-01-13 23:46 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: Robert Schiele <rschiele@uni-mannheim.de>
Cc: cc@pi3.informatik.uni-mannheim.de, <gcc-bugs@gcc.gnu.org>,
<gcc-gnats@gcc.gnu.org>, Andreas Jaeger <aj@suse.de>
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to
non PIC ones
Date: Mon, 13 Jan 2003 17:36:53 -0600 (CST)
This message is in MIME format. The first part should be readable text,
while the remaining parts are likely unreadable without MIME-aware tools.
Send mail to mime@docserver.cac.washington.edu for more info.
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> Wolfgang could you send me the crtbegin.o files from the compilers
> that you tried?
Attached is the crtbegin.o from the gcc3.2.2 snapshot (2002-12-13) I use,
compiled on the SuSE machine. This should be closest to your
configuration.
W.
-------------------------------------------------------------------------
Wolfgang Bangerth email: bangerth@ticam.utexas.edu
www: http://www.ticam.utexas.edu/~bangerth/
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-13 23:36 Robert Schiele
0 siblings, 0 replies; 12+ messages in thread
From: Robert Schiele @ 2003-01-13 23:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/9265; it has been noted by GNATS.
From: Robert Schiele <rschiele@uni-mannheim.de>
To: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
gcc-gnats@gcc.gnu.org, Andreas Jaeger <aj@suse.de>,
Volker Reichelt <reichelt@igpm.rwth-aachen.de>,
Christian Ehrhardt <ehrhardt@mathematik.uni-ulm.de>
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 14 Jan 2003 00:29:51 +0100
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On Mon, Jan 13, 2003 at 04:42:07PM -0600, Wolfgang Bangerth wrote:
>=20
> > > I have mainline snapshots from the last two years for about every two=
=20
> > > weeks, and none of them shows the behavior you see.
> >=20
> > You still didn't answer my question, which binutils you use. Might be
> > this information is of some use to understand the problem.
>=20
> I'm sorry. For the RedHat machine with the snapshot collection, it's=20
> 2.11.90.0.8, for the SuSE machine it's 2.11.92.0.10.
Hmm, SuSE 8.1 has 2.12.90.0.12. Is someone else with 2.12.x.x.x here
to test this?
> > > What do we do with this report?
> >=20
> > I hope you do not ignore it. My colleague and I have invested some
> > time to track this down to such a simple test case. (The real world
> > test case were megabytes of code.)
>=20
> I have no intention to _ignore_ the report, otherwise I would have closed=
=20
> it after not being able to reproduce it. On the other hand, we rely on=20
> being able to reproduce a problem to fix it, right?
Yes you are right. Sorry, might be I was a bit too harsh here. Hope
you don't mind.
> Volker, Christian, can one of you try to check this report on your=20
> systems? I think I have to pull out of this since I can't contribute=20
> anything any more...
Well, I did some more testing and found the following:
If I do compile and link with gcc 3.2.1, the resulting application is
faulty. Linking is done by:
/opt/Pkg/Linux/i686/gcc321/lib/gcc-lib/i486-suse-linux/3.2.1/collect2 --eh-=
frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 /usr/lib/crt1.o /u=
sr/lib/crti.o /opt/Pkg/Linux/i686/gcc321/lib/gcc-lib/i486-suse-linux/3.2.1/=
crtbegin.o -L/opt/Pkg/Linux/i686/gcc321/lib/gcc-lib/i486-suse-linux/3.2.1 -=
L/opt/Pkg/Linux/i686/gcc321/lib/gcc-lib/i486-suse-linux/3.2.1/../../.. pic.=
o nopic.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /opt/Pkg/Linux/i686/=
gcc321/lib/gcc-lib/i486-suse-linux/3.2.1/crtend.o /usr/lib/crtn.o
If I replace _only_ crtbegin.o with the one from gcc 3.2 release, the
resulting application works perfectly sane. So the bug must be
somewhere in crtstuff. Well crtstuff.c itself was not changed, so
this must be something in a file included from there. Or the reason
is that I have built the 3.2 release with binutils 2.11.x.x.x where I
have built the other compilers with 2.12.x.x.x.
Wolfgang could you send me the crtbegin.o files from the compilers
that you tried?
Robert
--=20
Robert Schiele Tel.: +49-621-181-2517
Dipl.-Wirtsch.informatiker mailto:rschiele@uni-mannheim.de
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-13 0:14 bangerth
0 siblings, 0 replies; 12+ messages in thread
From: bangerth @ 2003-01-13 0:14 UTC (permalink / raw)
To: cc, gcc-bugs, gcc-prs, nobody, rschiele
Synopsis: exception handling faulty wenn linking PIC objects to non PIC ones
State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Sun Jan 12 16:14:36 2003
State-Changed-Why:
Hm, I cannot reproduce the problem you have with a recent
snapshot. What is the result for you when you call ./a.out?
Is it an abort or a call to terminate()?
Also, note that with you code you do not make any use of
the symbols declared within the second file at all.
W.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9265
^ permalink raw reply [flat|nested] 12+ messages in thread
* c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
@ 2003-01-10 18:56 rschiele
0 siblings, 0 replies; 12+ messages in thread
From: rschiele @ 2003-01-10 18:56 UTC (permalink / raw)
To: gcc-gnats; +Cc: cc
>Number: 9265
>Category: c++
>Synopsis: exception handling faulty wenn linking PIC objects to non PIC ones
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Jan 10 10:56:02 PST 2003
>Closed-Date:
>Last-Modified:
>Originator: Robert Schiele
>Release: 3.2.1, 3.2.2 20030109 (prerelease), 3.3 20030109 (prerelease) and 3.4 20030109 (experimental)
>Organization:
>Environment:
System: Linux scavenger 2.4.19-4GB #1 Mon Oct 14 22:11:39 UTC 2002 i686 unknown
Architecture: i686
host: i486-suse-linux-gnu
build: i486-suse-linux-gnu
target: i486-suse-linux-gnu
configured with: /home/schiele/gcccvs/gcc-3.2.1/configure --enable-threads=posix --prefix=/opt/Pkg/Linux/i686/gcc321 --enable-languages=c,c++,f77,objc --disable-libgcj --with-gxx-include-dir=/opt/Pkg/Linux/i686/gcc321/include/g++ --with-system-zlib --enable-shared --enable-__cxa_atexit i486-suse-linux
>Description:
When linking a PIC object to a non PIC one that calls a function by a function pointer, exception handling is no longer working in the PIC object.
I could reproduce this on ia32 arch. On sparc it did not happen for me.
Note, I am not abolutely sure whether this is a bug, as I do not now what the specs say about linking PIC to non PIC objects in C++. But as I do not sea a reason, why this should not be allowed, I assume this is a bug.
The attached lines of code should output nothing, as the thrown exception is expected to be called immediately, but they print out an "Aborted".
>How-To-Repeat:
echo 'int main() { try { throw 0; } catch (...) {}}' | \
g++ -fpic -c -x c++ -o pic.o -
echo 'void (*b)(); void a() { (*b)(); }' | g++ pic.o -x c++ -
a.out
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2003-02-06 9:46 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-02-04 22:40 c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones bangerth
-- strict thread matches above, loose matches on Subject: below --
2003-02-06 9:46 Robert Schiele
2003-02-04 22:36 Robert Schiele
2003-02-04 20:26 Jakub Jelinek
2003-02-04 19:46 Robert Schiele
2003-01-14 22:46 Robert Schiele
2003-01-14 9:06 Robert Schiele
2003-01-14 7:06 Robert Schiele
2003-01-13 23:46 Wolfgang Bangerth
2003-01-13 23:36 Robert Schiele
2003-01-13 0:14 bangerth
2003-01-10 18:56 rschiele
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