From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-308027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 5089 invoked by alias); 9 Feb 2010 05:48:51 -0000
Received: (qmail 5053 invoked by uid 48); 9 Feb 2010 05:48:38 -0000
Date: Tue, 09 Feb 2010 05:48:00 -0000
Subject: [Bug libstdc++/43005]  New: Segmentation fault(not always) while running binary which has gcc and g++ compiled shared object files
X-Bugzilla-Reason: CC
Message-ID: <bug-43005-18759@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "sarveshwarac at india dot tejasnetworks dot com" <gcc-bugzilla@gcc.gnu.org>
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
X-SW-Source: 2010-02/txt/msg00779.txt.bz2

compiler version: gcc 4.0.0, g++ 4.0.0
Reading specs from /usr/bin/../lib/gcc/powerpc-linux/4.0.0/specs
Target: powerpc-linux
Configured with:
/opt/eldk/build/ppc-2007-01-19/work/usr/src/denx/BUILD/crosstool-0.35/build/gcc-4.0.0-glibc-2.3.5-eldk/powerpc-linux/gcc-4.0.0/configure
--target=powerpc-linux --host=i686-host_pc-linux-gnu
--prefix=/var/tmp/eldk.HzYZNd/usr/crosstool/gcc-4.0.0-glibc-2.3.5-eldk/powerpc-linux
--with-headers=/var/tmp/eldk.HzYZNd/usr/crosstool/gcc-4.0.0-glibc-2.3.5-eldk/powerpc-linux/powerpc-linux/include
--with-local-prefix=/var/tmp/eldk.HzYZNd/usr/crosstool/gcc-4.0.0-glibc-2.3.5-eldk/powerpc-linux/powerpc-linux
--disable-nls --enable-threads=posix --enable-symvers=gnu
--enable-languages=c,c++ --enable-shared --enable-c99 --enable-long-long
--enable-__cxa_atexit

Linux version used on target is 2.6.26.

I have two shared object files gcc compiled fpp.so and g++ compiled fcc.so.
fcc.so is only one file with following code:

fccMain.cpp:
-----------

#include<iostream>
int main()
{
    cout << "Starting fcc.d" <<endl;
    return 0;

}

fpp.so has lot of c code.

The above two .so's linked with the following command.

/usr/bin/6xx-gcc -Wl,-M,-Map,fz.d.map,--cref -o fz.d -lpthread libfcc.so
libfpp.so

When running the executable(fz.d) on target, once in a while giving
segmentation
fault before the main.

gdb stack dump is given below:
------------------------------
Program received signal SIGSEGV, Segmentation fault.
0x0e03f084 in free () from /lib/libc.so.6
(gdb) where
#0  0x0e03f084 in free () from /lib/libc.so.6
#1  0x0df0a70c in std::ctype<char>::ctype () from /usr/lib/libstdc++.so.6
#2  0x0df1006c in std::locale::_Impl::_Impl () from /usr/lib/libstdc++.so.6
#3  0x0df1097c in std::locale::_Impl::_Impl () from /usr/lib/libstdc++.so.6
#4  0x0df0a70c in std::ctype<char>::ctype () from /usr/lib/libstdc++.so.6
#5  0x0e106370 in _IO_2_1_stdin_ () from /lib/libc.so.6
#6  0x0df0a70c in std::ctype<char>::ctype () from /usr/lib/libstdc++.so.6
#7  0x0df10c5c in std::locale::locale () from /usr/lib/libstdc++.so.6
#8  0x0df0e104 in std::ios_base::Init::Init () from /usr/lib/libstdc++.so.6
#9  0x0ffabaa8 in __static_initialization_and_destruction_0 () from
/etc/libfcc.so
#10 0x0ffabaf8 in global constructors keyed to main () from /etc/libfcc.so
#11 0x0ffabd34 in __do_global_ctors_aux () from /etc/libfcc.so
#12 0x0df0a70c in std::ctype<char>::ctype () from /usr/lib/libstdc++.so.6
#13 0xbfa15ddc in ?? ()
#14 0x0df0a70c in std::ctype<char>::ctype () from /usr/lib/libstdc++.so.6
#15 0x4800beb4 in _dl_rtld_di_serinfo () from /lib/ld.so.1
#16 0x48010740 in realloc () from /lib/ld.so.1
Previous frame inner to this frame (corrupt stack?)

If i remove the #include<iostream> line(fccMain.cpp) and replace it with either
<istream> and <ostream> or with <stdio.h>(printf in place of cout) it is always
working without any issue. Global data initialization from libfpp.so is looks
happening properly. But libfcc.so global data initialization is failing some
times in iostream, while initializing static ios_base::Init __ioinit.

I already tried by enabling -fpic, but still the problem is seen. Is it a bug
in gcc/g++(4.0.0) ? 


-Sarveshwara Chary.


-- 
           Summary: Segmentation fault(not always) while running binary
                    which has gcc and g++ compiled shared object files
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sarveshwarac at india dot tejasnetworks dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43005