Re: Problem with std::ostringstream operator<<(long)

["m." <michal017@xxxxxxxxxx>]

I had similar problems when compiling threaded applications with gcc 
that was compiled with thread model single.
m.

L.Suresh wrote:
> Hi,
> I'm getting a segmentation fault in my program when using
> std::ostringstream.
>
> Code excertps:
>
> std::ostringstream ostr;    
> ostr << pInfo.getPacketId(); // <-- Offending line. calls op<<(long)
>
> ... Output few more strings .....
>
> std::cout << ostr.str() << std::endl
>
>
> GDB: Stack trace
>
> #0  0x0075cdb2 in _int_malloc () from /lib/tls/libc.so.6
> #1  0x0075c10d in malloc () from /lib/tls/libc.so.6
> #2  0x00b7c80e in operator new(unsigned) () from /usr/lib/libstdc++.so.5
> #3  0x00b68c49 in std::__default_alloc_template<true,
> 0>::allocate(unsigned) ()
>    from /usr/lib/libstdc++.so.5
> #4  0x00b6e678 in std::string::_Rep::_S_create(unsigned,
> std::allocator<char> const&) () from /usr/lib/libstdc++.so.5
> #5  0x00b6e749 in std::string::_Rep::_M_clone(std::allocator<char>
> const&, unsigned) () from /usr/lib/libstdc++.so.5
> #6  0x00b6c3bd in std::string::reserve(unsigned) ()
>    from /usr/lib/libstdc++.so.5
> #7  0x00b6347f in std::basic_stringbuf<char, std::char_traits<char>,
> std::allocator<char> >::overflow(int) () from /usr/lib/libstdc++.so.5
> #8  0x00b69ee4 in std::basic_streambuf<char, std::char_traits<char>
>
> > ::xsputn(char const*, int) () from /usr/lib/libstdc++.so.5
>
> #9  0x00b499ff in std::ostreambuf_iterator<char, std::char_traits<char>
>
> > std::num_put<char, std::ostreambuf_iterator<char,
>
> std::char_traits<char> >
>
> > ::_M_convert_int<long>(std::ostreambuf_iterator<char,
>
> std::char_traits<char> >, std::ios_base&, char, long) const () from
> /usr/lib/libstdc++.so.5
> #10 0x00b495e0 in std::num_put<char, std::ostreambuf_iterator<char,
> std::char_traits<char> > >::do_put(std::ostreambuf_iterator<char,
> std::char_traits<char> >, std::ios_base&, char, long) const () from
> /usr/lib/libstdc++.so.5
> #11 0x00b5ef9c in std::ostream::operator<<(long) ()
> #12 0x0806a99b in Engine::NullEngine::analyze(NA::PacketInfo const&) (
>     this=0x8f9c860, pInfo=@0x8fe3058) at packetinfo.h:146
> #13 0x080721c6 in App::WorkerThreadTask::run(Thread*) (this=0x9062860,
>     th=0x9072fc0) at ../application/workerthreadtask.cpp:39
> #14 0x0804fe50 in Thread::start(void*) (data=0x9072fc0)
>     at ../util/thread.cpp:122
> #15 0x0097b79c in start_thread () from /lib/tls/libpthread.so.0
> #16 0x007c827a in clone () from /lib/tls/libc.so.6