Re: [Valgrind-users] Does creating a stringstream object cause a leak

[Miguel O. <mig...@gm...>]

On Mon, May 4, 2009 at 3:32 PM, fpga <mgb...@bl...> wrote:
>
> #include "sstream"
> using namespace std;
> int main(){
>   stringstream ss;
>   return 0;
> }
>
> Why does the above cause this 'bug'?

Trying...

$ valgrind --version
valgrind-3.4.1-Debian
$ g++ --version
g++ (Debian 4.3.3-3) 4.3.3
$ valgrind ./a.out
...
==2990== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 17 from 1)
==2990== malloc/free: in use at exit: 0 bytes in 0 blocks.
==2990== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==2990== For counts of detected errors, rerun with: -v
==2990== All heap blocks were freed -- no leaks are possible.
...

Which versions are you using? Is your C++ lib in good shape?

>
> ==4249== Invalid free() / delete / delete[]
> ==4249==    at 0x40052EA: operator delete(void*, std::nothrow_t const&)
> (vg_replace_malloc.c:354)
> ==4249==    by 0x5544058: std::__verify_grouping(char const*, unsigned,
> std::string const&) (locale_facets.cc:108)
> ==4249==    by 0x5544F8C: std::locale::_Impl::_Impl(char const*, unsigned)
> (localename.cc:218)
> ==4249==    by 0x554500C: std::locale::_Impl::_Impl(char const*, unsigned)
> (localename.cc:206)
> ==4249==    by 0x5546137: std::locale::locale() (localename.cc:88)
> ==4249==    by 0x5540B9B: std::ios_base::ios_base() (locale.cc:378)
> ==4249==    by 0x557EAA4: std::basic_stringstream<char,
> std::char_traits<char>, std::allocator<char>
>>::basic_stringstream(std::_Ios_Openmode) (istream:586)
> ==4249==    by 0x804863E: main (/home/me/Desktop/new_play/bug.cpp:4)
> ==4249==  Address 0x55dd188 is not stack'd, malloc'd or (recently) free'd
> --
> View this message in context: http://www.nabble.com/Does-creating-a-stringstream-object-cause-a-leak-tp23370849p23370849.html
> Sent from the Valgrind - Users mailing list archive at Nabble.com.
>
>
> ------------------------------------------------------------------------------
> Register Now & Save for Velocity, the Web Performance & Operations
> Conference from O'Reilly Media. Velocity features a full day of
> expert-led, hands-on workshops and two days of sessions from industry
> leaders in dedicated Performance & Operations tracks. Use code vel09scf
> and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf
> _______________________________________________
> Valgrind-users mailing list
> Val...@li...
> https://lists.sourceforge.net/lists/listinfo/valgrind-users
>