[Boost-users] [date time] Something leaks in operator<<

From: Seweryn Habdank-Wojewódzki (shw_at_[hidden])
Date: 2007-05-28 05:04:01

Hi

I do not know if date time leaks or not, but I want to clarify that before I 
will send information to libstdc++ bugzilla.

Regards.

The code:

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>

int main()
{
    using namespace boost::gregorian;
    using namespace std;

    date b1 (2007,2,3);
    date b2 (2007,2,7);

    cout << b1 << '\n'; // line 12
    cout << b2 << '\n'; // line 13
    date_period p1 (b1, b2);
    cout << p1 << '\n'; // line 15
}

And the result of:

valgrind --leak-check=full --show-reachable=yes ./main

==2382== Memcheck, a memory error detector.
==2382== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==2382== Using LibVEX rev 1732, a library for dynamic binary translation.
==2382== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==2382== Using valgrind-3.2.3, a dynamic binary instrumentation framework.
==2382== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==2382== For more details, rerun with: -v
==2382== 
2007-Feb-03
2007-Feb-07
[2007-Feb-03/2007-Feb-06]
==2382== 
==2382== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 1)
==2382== malloc/free: in use at exit: 856 bytes in 26 blocks.
==2382== malloc/free: 58 allocs, 32 frees, 2,772 bytes allocated.
==2382== For counts of detected errors, rerun with: -v
==2382== searching for pointers to 26 not-freed blocks.
==2382== checked 107,996 bytes.
==2382== 
==2382== 20 bytes in 1 blocks are still reachable in loss record 1 of 7
==2382==    at 0x4021FB4: operator new(unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x8049CDD: 
std::locale::locale<boost::date_time::date_facet<boost::gregorian::date, 
char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale 
const&, boost::date_time::date_facet<boost::gregorian::date, char, 
std::ostreambuf_iterator<char, std::char_traits<char> > >*) 
(locale_classes.h:568)
==2382==    by 0x804F4E2: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:57)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== 
==2382== 48 bytes in 1 blocks are still reachable in loss record 2 of 7
==2382==    at 0x4021C34: operator new[](unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x40AE6B5: std::locale::_Impl::_Impl(std::locale::_Impl const&, 
unsigned) (in /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8)
==2382==    by 0x8049CF9: 
std::locale::locale<boost::date_time::date_facet<boost::gregorian::date, 
char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale 
const&, boost::date_time::date_facet<boost::gregorian::date, char, 
std::ostreambuf_iterator<char, std::char_traits<char> > >*) 
(locale_classes.h:568)
==2382==    by 0x804F4E2: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:57)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== 
==2382== 80 bytes in 2 blocks are still reachable in loss record 3 of 7
==2382==    at 0x4021FB4: operator new(unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x804C497: std::vector<std::string, std::allocator<std::string> 
>::_M_insert_aux(__gnu_cxx::__normal_iterator<std::string*, 
std::vector<std::string, std::allocator<std::string> > >, std::string const&) 
(new_allocator.h:90)
==2382==    by 0x804CB25: 
boost::date_time::date_generator_formatter<boost::gregorian::date, char, 
std::ostreambuf_iterator<char, std::char_traits<char> > 
>::date_generator_formatter() (stl_vector.h:610)
==2382==    by 0x804ED2E: boost::date_time::date_facet<boost::gregorian::date, 
char, std::ostreambuf_iterator<char, std::char_traits<char> > 
>::date_facet(unsigned) (date_facet.hpp:86)
==2382==    by 0x804F4B5: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:56)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== 
==2382== 112 bytes in 1 blocks are still reachable in loss record 4 of 7
==2382==    at 0x4021FB4: operator new(unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x804F4A5: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:56)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== 
==2382== 128 bytes in 1 blocks are still reachable in loss record 5 of 7
==2382==    at 0x4021C34: operator new[](unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x40AE262: std::locale::_Impl::_M_install_facet(std::locale::id 
const*, std::locale::facet const*) 
(in /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8)
==2382==    by 0x8049D13: 
std::locale::locale<boost::date_time::date_facet<boost::gregorian::date, 
char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale 
const&, boost::date_time::date_facet<boost::gregorian::date, char, 
std::ostreambuf_iterator<char, std::char_traits<char> > >*) 
(locale_classes.h:571)
==2382==    by 0x804F4E2: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:57)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== 
==2382== 128 bytes in 1 blocks are still reachable in loss record 6 of 7
==2382==    at 0x4021C34: operator new[](unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x40AE1EF: std::locale::_Impl::_M_install_facet(std::locale::id 
const*, std::locale::facet const*) 
(in /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8)
==2382==    by 0x8049D13: 
std::locale::locale<boost::date_time::date_facet<boost::gregorian::date, 
char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale 
const&, boost::date_time::date_facet<boost::gregorian::date, char, 
std::ostreambuf_iterator<char, std::char_traits<char> > >*) 
(locale_classes.h:571)
==2382==    by 0x804F4E2: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:57)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== 
==2382== 340 bytes in 19 blocks are possibly lost in loss record 7 of 7
==2382==    at 0x4021FB4: operator new(unsigned) 
(in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==2382==    by 0x40F08F3: std::string::_Rep::_S_create(unsigned, unsigned, 
std::allocator<char> const&) 
(in /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8)
==2382==    by 0x40F1A94: 
(within /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8)
==2382==    by 0x40F1C48: std::string::string(char const*, 
std::allocator<char> const&) 
(in /usr/lib/gcc/i686-pc-linux-gnu/4.1.1/libstdc++.so.6.0.8)
==2382==    by 0x804EC4B: boost::date_time::date_facet<boost::gregorian::date, 
char, std::ostreambuf_iterator<char, std::char_traits<char> > 
>::date_facet(unsigned) (date_facet.hpp:86)
==2382==    by 0x804F4B5: std::basic_ostream<char, std::char_traits<char> >& 
boost::gregorian::operator<< <char, std::char_traits<char> 
>(std::basic_ostream<char, std::char_traits<char> >&, boost::gregorian::date 
const&) (gregorian_io.hpp:56)
==2382==    by 0x8049B01: main (main.cpp:12)
==2382== 
==2382== LEAK SUMMARY:
==2382==    definitely lost: 0 bytes in 0 blocks.
==2382==      possibly lost: 340 bytes in 19 blocks.
==2382==    still reachable: 516 bytes in 7 blocks.
==2382==         suppressed: 0 bytes in 0 blocks.

-- 
|\/\/|   Seweryn Habdank-Wojewódzki
 \/\/