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Fw: RE: input stream crash with gcc 3.1/cygwin (includes stack trace)


posted previously on the cygwin mailing list - is there anyone here who can
help out?

The problem is that any use of input streams causes a segmentation fault
(ifstream, cin, etc) so its quite a serious problem that I need help
resolving.

Regards

---------------------------------
Q-Games, Dylan Cuthbert.
http://www.q-games.com/personal/utils

----- Original Message -----
From: "Dylan Cuthbert" <dylan@nospamq-games.com>
Newsgroups: gmane.os.cygwin
Sent: Tuesday, March 19, 2002 7:16 PM
Subject: Re: RE: input stream crash with gcc 3.1 (stack trace)


> After compiling the stdlibs with -O0 -g I tracked down the crash to
address:
> 0x004bdd7d
>
> looking in my map file I see this at that address:
>
>  .text$_ZNKSt5ctypeIcE2isEcc
>                 0x004bdd60       0x3c
> /usr/local/lib/libstdc++.a(misc-inst.o)
>                 0x004bdd60                __ZNKSt5ctypeIcE2isEcc
>
> here is the full de-mapped stack dump:  note: gdb 5.1 is playing up with
the
> new gcc 3.1 output format (maybe I need to grab a different branch of
gdb?)
> so I can't simply do a symbolic stack trace (it seg faults on me).
>
> 0x004bdd7d:
>
>  .text$_ZNKSt5ctypeIcE2isEcc
>                 0x004bdd60       0x3c
> /usr/local/lib/libstdc++.a(misc-inst.o)
>                 0x004bdd60                __ZNKSt5ctypeIcE2isEcc
>
>
> 0x004c7c6e:
>
> .text$_ZNSi6sentryC1ERSib
>                 0x004c7b6c      0x184
> /usr/local/lib/libstdc++.a(misc-inst.o)
>                 0x004c7b6c                __ZNSi6sentryC1ERSib
>  .text$_ZNSi6sentryC2ERSib
>
> 0x004f5b5f:
>
>
.text$_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RSbIS4_S5_
> T1_E
>                 0x004f5b38      0x1f4
> /usr/local/lib/libstdc++.a(misc-inst.o)
>                 0x004f5b38
>
__ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RSbIS4_S5_T1_E
>
>
>
> Anyone got any ideas??
>
> ---------------------------------
> Q-Games, Dylan Cuthbert.
> http://www.q-games.com
>
> "Dylan Cuthbert" <dylan@nospamq-games.com> wrote in message
> news:a76gn8$g39$1@main.gmane.org...
> > Hmm.. I noticed some talk on a mailing list somewhere about problems
with
> > locales... could it be to do with input streams trying to look up locale
> > info and getting null ptrs as a result?
> >
> > I'll try compiling libstdc++-v3 with -g and -O0 and see how far I can
> get -
> > does gdb 5.1 work ok with gcc 3.1 output?
> >
> > Regards
> >
> > ---------------------------------
> > Q-Games, Dylan Cuthbert.
> > http://www.q-games.com
> >
> > "Billinghurst, David (CRTS)" <David.Billinghurst@riotinto.com> wrote in
> > message
> >
news:FAC87D7C874EAB46A847604DA4FD5A640346C9@crtsmail.corp.riotinto.org...
> > I just tried this too. Same result.  I have been chasing (without
success)
> > some libstdc++-v3 testsuite failures that are similar.  That discusion
is
> on
> > the libstdc++ mailing list.   The advice was to try recompiling
> libtsdc++-v3
> > with CXXFLAGS="-g -O0" and use the debugger.  This got me a little
further
> > into the code.
> >
> > -----Original Message-----
> > From: Dylan Cuthbert [mailto:dylan@q-games.com]
> > Sent: Tuesday, 19 March 2002 2:11
> > Subject: Re: RE: input stream crash with gcc 3.1
> >
> >
> > I tried this #define (in the newlib bits directory - cygwin uses newlib
> > right?), reconfigured and recompiled gcc 3.1, but the same problem
> occurs -
> > segmentation fault on the simplest bit of code that uses cin or ifstream
> or
> > stringstream.  ( cout etc. works fine by the way).
> >
> > I'll repeat the code snippet for clarification:
> >
> > main()
> > {
> > std::string frog;
> > std::cin >> frog;
> > assert( 0 );
> > }
> >
> > (it doesn't get to the assert and segment faults)
> >
> > Any other ideas? :-/
> >
> > ---------------------------------
> > Q-Games, Dylan Cuthbert.
> > http://www.q-games.com/personal/utils
> >
> > ----- Original Message -----
> > From: "Danny Smith" <danny_r_smith_2001@yahoo.co.nz>
> > Sent: Tuesday, March 19, 2002 8:08 AM
> > Subject: Fwd: RE: input stream crash with gcc 3.1
> >
> >
> > > > From: Danny Smith <danny_r_smith_2001@yahoo.co.nz>
> > > > Subject: RE: input stream crash with gcc 3.1
> > > > To: dylan@nospamq-games.com
> > > > CC: cygwin@cygwin.com
> > > >
> > > > > I have recently compiled the latest 3.1 branch (grabbed directly
via
> > > > cvs)
> > > > > for cygwin (1.3.9) and am having problems when using anything
> related
> > > > at
> > > > > all
> > > > > to input streams.
> > > >
> > > > See this:
> > > > http://gcc.gnu.org/ml/gcc-patches/2001-06/msg00841.html
> > > > then try rebuilding libstdc++ with
> > > >
> > > > #define _GLIBCPP_AVOID_FSEEK
> > > > added to /libstdc++-v3/config/os/newlib/bits/os_defines.h
> > > >
> > > > Danny
> > > >
> > > > http://movies.yahoo.com.au - Yahoo! Movies
> > > > - Vote for your nominees in our online Oscars pool.
> > > >
> > >
> > > http://movies.yahoo.com.au - Yahoo! Movies
> > > - Vote for your nominees in our online Oscars pool.
> >
> >
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