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* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-12 9:56 Richard Henderson
0 siblings, 0 replies; 10+ messages in thread
From: Richard Henderson @ 2002-04-12 9:56 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Richard Henderson <rth@redhat.com>
To: Stuart Anderson <sba@srl.caltech.edu>
Cc: gcc-gnats@gcc.gnu.org, anderson@ligo.caltech.edu, gcc-bugs@gcc.gnu.org
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Fri, 12 Apr 2002 09:49:49 -0700
On Fri, Apr 12, 2002 at 08:11:28AM -0700, Stuart Anderson wrote:
> However, PR4150 is for i686-pc-linux-gnu whereas PR5396 is explicitly for
> Solaris8 and not on a RedHat7.1 Linux.
So? It can still be the same underlying problem.
r~
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-23 5:25 jason
0 siblings, 0 replies; 10+ messages in thread
From: jason @ 2002-04-23 5:25 UTC (permalink / raw)
To: anderson, gcc-bugs, gcc-prs, jakub, jason, nobody
Synopsis: ifstream read()'s data multiple times on Solaris
Responsible-Changed-From-To: unassigned->jason
Responsible-Changed-By: jason
Responsible-Changed-When: Tue Apr 23 05:24:56 2002
Responsible-Changed-Why:
got it
State-Changed-From-To: analyzed->closed
State-Changed-By: jason
State-Changed-When: Tue Apr 23 05:24:56 2002
State-Changed-Why:
Fixed for 3.1 by same patch as 4150.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5396
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-20 5:56 Craig Rodrigues
0 siblings, 0 replies; 10+ messages in thread
From: Craig Rodrigues @ 2002-04-20 5:56 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Craig Rodrigues <rodrigc@attbi.com>
To: jakub@unthought.net, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
anderson@ligo.caltech.edu, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Sat, 20 Apr 2002 08:48:52 -0400
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5396
Submitted by jakub@unthought.net:
Hello all,
I am seeing an error possibly related to PR 5936:
Following configurations are affected:
GCC-3.0.2 with vendor linker and assembler, with sjlj-exceptions.
GCC-3.0.4 with vendor linker and assembler, with and without sjlj-excepti=
ons
GCC-3.0.4 with GNU binutils 2.12, without sjlj-exceptions.
I have not yet found a working configuration (one that does not expose th=
e bug=20
that I see - any configuration not listed above, is simply not yet tested=
)
My problem: A non-virtual method in a base class throws an exception, ca=
using=20
either a segfault or a bus error, depending on configurations either in=20
vec.cc or eh_throw.cc.
The method throwing the exception can be either in a shared library, or i=
n the=20
main executable (linked statically, but first incrementally linked into a=
=20
library prior to linking into the executable). This makes no difference.
With GCC-3.0.4 and GNU binutils 2.12, I get:
#0 0xff24fca0 in __cxa_throw (obj=3D0xfeb19fec, tinfo=3D0x15a038,
dest=3D0xb194c <_ZN6errors16connectionclosedD1Ev>) at eh_throw.cc:63
63 header->unwindHeader.exception_class =3D __gxx_exception_class;
Compiler configuration:
$ g++ -v
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.8/3.0.4/spec=
s
Configured with: ./configure --enable-languages=3Dc,c++ --disable-threads=
=20
--with-as=3D/usr/local/bin/as --with-gnu-as --with-ld=3D/usr/local/bin/ld=
=20
--with-gnu-ld
Thread model: single
gcc version 3.0.4
I tried writing a small test program, but weren't successful in that. I h=
ave=20
some hundreds of thousands of lines of C++, two handfulls of processes al=
l=20
using this code, and *one* process exhibiting the problem. The exact sam=
e=20
code compiles and works with GCC-3.0.1, GCC-3.0.3 (and others) on various=
=20
Intel based systems (RedHat Linux, Debian GNU/Linux, FreeBSD).
Oh, and my system is:
$ uname -a
SunOS sol 5.8 Generic_108528-05 sun4u sparc SUNW,Ultra-1
Any ideas ? Need more info ? Anything I can try/test ? I will try the =
head=20
of the 3.1 branch today.
Cheers,
/ jakob
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-20 5:46 Craig Rodrigues
0 siblings, 0 replies; 10+ messages in thread
From: Craig Rodrigues @ 2002-04-20 5:46 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Craig Rodrigues <rodrigc@attbi.com>
To: jakub@unthought.net, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
anderson@ligo.caltech.edu, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Sat, 20 Apr 2002 08:40:40 -0400
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5396
Submitted by jakub@unthought.net:
On Thu, Apr 18, 2002 at 07:58:11AM -0400, Andras Pataki wrote:
> Last week I investigated the problem I was experiencing some more and
> found a solution. We installed a Solaris linker patch (as part of a
> larger patch set) which seems to have solved the problem for me.
>
> Here are the patch numbers for the various versions of Solaris. It's
> worth giving a try:
> 103627 - Solaris 2.5.1
> 107733 - Solaris 2.6
> 106950 - Solaris 7
> 109147 - Solaris 8
>
Great ! Thanks, I will give this a try over the weekend.
So far I have solved the problem by simple changing the structure of
the exceptions that I throw.
Previously, the exception that caused the problem was a class inherited
from another class, again inherited from a base. By only throwing
exceptions
inherited directly from the base, the problem disappears.
Thanks,
/ jakob
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-20 5:36 Craig Rodrigues
0 siblings, 0 replies; 10+ messages in thread
From: Craig Rodrigues @ 2002-04-20 5:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Craig Rodrigues <rodrigc@attbi.com>
To: gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, anderson@ligo.caltech.edu,
gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Sat, 20 Apr 2002 08:33:33 -0400
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5396
Submitted by: apataki@apataki.dhs.org
Last week I investigated the problem I was experiencing some more and
found a solution. We installed a Solaris linker patch (as part of a
larger patch set) which seems to have solved the problem for me.
Here are the patch numbers for the various versions of Solaris. It's
worth giving a try:
103627 - Solaris 2.5.1=20
107733 - Solaris 2.6=20
106950 - Solaris 7=20
109147 - Solaris 8=20
Andras
On Wed, 17 Apr 2002, Jakob [iso-8859-1] =D8stergaard wrote:
>=20
> Hello all,
>=20
> I am seeing an error possibly related to PR 5936:
>=20
> Following configurations are affected:
> GCC-3.0.2 with vendor linker and assembler, with sjlj-exceptions.
> GCC-3.0.4 with vendor linker and assembler, with and without
sjlj-excepti=
ons
> GCC-3.0.4 with GNU binutils 2.12, without sjlj-exceptions.
>=20
> I have not yet found a working configuration (one that does not
expose th=
e bug=20
> that I see - any configuration not listed above, is simply not yet
tested=
)
>=20
> My problem: A non-virtual method in a base class throws an
exception, ca=
using=20
> either a segfault or a bus error, depending on configurations either in=
=20
> vec.cc or eh_throw.cc.
>=20
> The method throwing the exception can be either in a shared library,
or i=
n the=20
> main executable (linked statically, but first incrementally linked
into a=
=20
> library prior to linking into the executable). This makes no difference.
>=20
> With GCC-3.0.4 and GNU binutils 2.12, I get:
>=20
> #0 0xff24fca0 in __cxa_throw (obj=3D0xfeb19fec, tinfo=3D0x15a038,
> dest=3D0xb194c <_ZN6errors16connectionclosedD1Ev>) at eh_throw.cc:63
> 63 header->unwindHeader.exception_class =3D __gxx_exception_class;
>=20
> Compiler configuration:
>=20
> $ g++ -v
> Reading specs from
/usr/local/lib/gcc-lib/sparc-sun-solaris2.8/3.0.4/spec=
s
> Configured with: ./configure --enable-languages=3Dc,c++
--disable-threads=
=20
> --with-as=3D/usr/local/bin/as --with-gnu-as
--with-ld=3D/usr/local/bin/ld=
=20
> --with-gnu-ld
> Thread model: single
> gcc version 3.0.4
>=20
> I tried writing a small test program, but weren't successful in that.
I h=
ave=20
> some hundreds of thousands of lines of C++, two handfulls of
processes al=
l=20
> using this code, and *one* process exhibiting the problem. The exact
sam=
e=20
> code compiles and works with GCC-3.0.1, GCC-3.0.3 (and others) on
various=
=20
> Intel based systems (RedHat Linux, Debian GNU/Linux, FreeBSD).
>=20
> Oh, and my system is:
> $ uname -a
> SunOS sol 5.8 Generic_108528-05 sun4u sparc SUNW,Ultra-1
>=20
> Any ideas ? Need more info ? Anything I can try/test ? I will try
the =
head=20
> of the 3.1 branch today.
>=20
> Cheers,
>=20
> / jakob
>=20
>=20
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-12 11:36 Stuart Anderson
0 siblings, 0 replies; 10+ messages in thread
From: Stuart Anderson @ 2002-04-12 11:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Stuart Anderson <sba@srl.caltech.edu>
To: Richard Henderson <rth@redhat.com>
Cc: Stuart Anderson <sba@srl.caltech.edu>, gcc-gnats@gcc.gnu.org,
anderson@ligo.caltech.edu, gcc-bugs@gcc.gnu.org
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Fri, 12 Apr 2002 11:33:03 -0700 (PDT)
According to Richard Henderson:
> On Fri, Apr 12, 2002 at 08:11:28AM -0700, Stuart Anderson wrote:
> > However, PR4150 is for i686-pc-linux-gnu whereas PR5396 is explicitly for
> > Solaris8 and not on a RedHat7.1 Linux.
>
> So? It can still be the same underlying problem.
>
Yes it can be common problem, but I doubt it. What I should have said
is that the test case for PR5396 does show the same bug on RH7.1 Linux
but instead works perfectly.
--
Stuart Anderson sba@srl.caltech.edu http://www.srl.caltech.edu/personnel/sba
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-12 8:16 Stuart Anderson
0 siblings, 0 replies; 10+ messages in thread
From: Stuart Anderson @ 2002-04-12 8:16 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Stuart Anderson <sba@srl.caltech.edu>
To: Richard Henderson <rth@redhat.com>
Cc: gcc-gnats@gcc.gnu.org, anderson@ligo.caltech.edu, gcc-bugs@gcc.gnu.org
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Fri, 12 Apr 2002 08:11:28 -0700 (PDT)
However, PR4150 is for i686-pc-linux-gnu whereas PR5396 is explicitly for
Solaris8 and not on a RedHat7.1 Linux.
According to Richard Henderson:
> Almost certainly related to libstdc++/4150
>
> http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4150
>
>
--
Stuart Anderson sba@srl.caltech.edu http://www.srl.caltech.edu/personnel/sba
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-11 18:26 Richard Henderson
0 siblings, 0 replies; 10+ messages in thread
From: Richard Henderson @ 2002-04-11 18:26 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR libstdc++/5396; it has been noted by GNATS.
From: Richard Henderson <rth@redhat.com>
To: gcc-gnats@gcc.gnu.org, anderson@ligo.caltech.edu, gcc-bugs@gcc.gnu.org
Cc:
Subject: Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
Date: Thu, 11 Apr 2002 18:22:25 -0700
Almost certainly related to libstdc++/4150
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4150
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-04-03 18:32 pme
0 siblings, 0 replies; 10+ messages in thread
From: pme @ 2002-04-03 18:32 UTC (permalink / raw)
To: anderson, gcc-bugs, gcc-prs, nobody
Synopsis: ifstream read()'s data multiple times on Solaris
State-Changed-From-To: open->analyzed
State-Changed-By: pme
State-Changed-When: Wed Apr 3 18:32:06 2002
State-Changed-Why:
Not really analyzed yet, but reproduced with 3.1 sources,
20020402 prerelease.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5396
^ permalink raw reply [flat|nested] 10+ messages in thread
* libstdc++/5396: ifstream read()'s data multiple times on Solaris
@ 2002-01-15 15:06 anderson
0 siblings, 0 replies; 10+ messages in thread
From: anderson @ 2002-01-15 15:06 UTC (permalink / raw)
To: gcc-gnats
>Number: 5396
>Category: libstdc++
>Synopsis: ifstream read()'s data multiple times on Solaris
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Jan 15 15:06:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Stuart Anderson
>Release: gcc-3.0.3
>Organization:
>Environment:
SunOS XXX 5.8 Generic_108528-12 sun4u sparc SUNW,Ultra-60
>Description:
The following simple code to read a file using ifstream
results in the following system call chain on Solaris 8
with gcc-3.0.x,
read(8k) lseek(1k absolute) read(8k) lseek(2k absolute) ...
rather than the following from gcc-2.95.3,
read(8k) read(8k) read(8k) ...
Note in the gcc-3.0.x case there are 8 times more
calls to read() than for gcc-2.95.3!
This bug does not occur on a RedHat7.2 machine with
gcc-3.0.3, and has been reproduced on Solaris with
gcc-3.0.1, 3.0.2, and 3.0.3.
The resulting performance hit prevents our project
from using gcc-3.0.x.
>How-To-Repeat:
truss ./a.out /dev/zero
after compiling,
#include<iostream>
#include<fstream>
main(int argc, char *argv[]){
std::cerr << "foo" << std::endl;
std::ifstream in(argv[1]);
for(int i = 0; i < 100; i++){
char data[1024];
in.read(data,1024);
}
}
Here is a section of the truss output that shows the problem:
open("/dev/zero", O_RDONLY) = 3
fstat64(3, 0xFFBEF2E0) = 0
brk(0x00033140) = 0
brk(0x00035140) = 0
ioctl(3, TCGETA, 0xFFBEF26C) Err#6 ENXIO
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0".., 8192) = 8192
lseek(3, 0xFFFFE000, SEEK_CUR) = 0
llseek(3, 0, SEEK_CUR) = 0
lseek(3, 1024, SEEK_CUR) = 1024
llseek(3, 0, SEEK_CUR) = 1024
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0".., 8192) = 8192
lseek(3, 0xFFFFE000, SEEK_CUR) = 1024
llseek(3, 0, SEEK_CUR) = 1024
lseek(3, 1024, SEEK_CUR) = 2048
llseek(3, 0, SEEK_CUR) = 2048
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0".., 8192) = 8192
lseek(3, 0xFFFFE000, SEEK_CUR) = 2048
llseek(3, 0, SEEK_CUR) = 2048
lseek(3, 1024, SEEK_CUR) = 3072
llseek(3, 0, SEEK_CUR) = 3072
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0".., 8192) = 8192
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2002-04-23 12:25 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
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2002-04-12 9:56 libstdc++/5396: ifstream read()'s data multiple times on Solaris Richard Henderson
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2002-04-23 5:25 jason
2002-04-20 5:56 Craig Rodrigues
2002-04-20 5:46 Craig Rodrigues
2002-04-20 5:36 Craig Rodrigues
2002-04-12 11:36 Stuart Anderson
2002-04-12 8:16 Stuart Anderson
2002-04-11 18:26 Richard Henderson
2002-04-03 18:32 pme
2002-01-15 15:06 anderson
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