Re: Memory leaks

[Andrew Potter <agpotter gmail com>]

You are using gtkmm correctly.

This isn't a gtkmm bug but is in at-spi. I fixed a similar bug for
them before (#688363). I'd suggest filing a bug report with a patch on
product at-spi if you can.

On Wed, Oct 2, 2013 at 10:07 PM, Norman Goldstein <normvcr telus net> wrote:
> I have searched through the past year, and there are several posts about
> memory leaks in gtkmm/gtk+. However, I am not clear as to what the
> recommendation is.  I am using gtkmm30 on fedora 18 x86 32-bit.
> I built and ran a standard piece of sample code:
>
> #include <gtkmm.h>
> int main(int argc, char *argv[])
> {
>   Glib::RefPtr<Gtk::Application> app =
>     Gtk::Application::create(argc, argv,
>       "org.gtkmm.examples.base");
>
>   Gtk::Window window;
>   window.set_default_size(200, 200);
>
>   return app->run(window);
> }// main
>
> ***** Is there a clean-up routine I should also be invoking? ********
>
> Valgrind gave the following summary:
>
> ==24123== LEAK SUMMARY:
> ==24123==    definitely lost: 280 bytes in 28 blocks
> ==24123==    indirectly lost: 0 bytes in 0 blocks
> ==24123==      possibly lost: 747,922 bytes in 6,535 blocks
> ==24123==    still reachable: 413,852 bytes in 7,213 blocks
> ==24123==         suppressed: 0 bytes in 0 blocks
> ==24123== Reachable blocks (those to which a pointer was found) are not
> shown.
> ==24123== To see them, rerun with: --leak-check=full --show-reachable=yes
> ==24123==
> ==24123== For counts of detected and suppressed errors, rerun with: -v
> ==24123== ERROR SUMMARY: 1085 errors from 1085 contexts (suppressed: 0 from
> 0)
>
> Here is the first "definitely lost" report:
>
> ==24123== 8 bytes in 1 blocks are definitely lost in loss record 1,936 of
> 7,107
> ==24123==    at 0x4008FAF: malloc
> (/builddir/build/BUILD/valgrind-3.8.1/coregrind/m_replacemalloc/vg_replace_malloc.c:270)
> ==24123==    by 0x44FF50DB: standard_malloc
> (/usr/src/debug/glib-2.34.2/glib/gmem.c:85)
> ==24123==    by 0x44FF5481: g_malloc
> (/usr/src/debug/glib-2.34.2/glib/gmem.c:159)
> ==24123==    by 0x476A8C06: droute_path_add_interface
> (/usr/src/debug/at-spi2-atk-2.6.2/droute/droute.c:234) (<=================)
> ==24123==    by 0x476B0845: spi_initialize_selection
> (/usr/src/debug/at-spi2-atk-2.6.2/atk-adaptor/adaptors/selection-adaptor.c:262)
> ==24123==    by 0x476A333D: atk_bridge_adaptor_init
> (/usr/src/debug/at-spi2-atk-2.6.2/atk-adaptor/bridge.c:907)
> ==24123==    by 0x41D4C3C2: _gtk_accessibility_init
> (/usr/src/debug/gtk+-3.6.4/gtk/a11y/gail.c:831)
> ==24123==    by 0x41BAA546: post_parse_hook
> (/usr/src/debug/gtk+-3.6.4/gtk/gtkmain.c:733)
> ==24123==    by 0x44FFB429: g_option_context_parse
> (/usr/src/debug/glib-2.34.2/glib/goption.c:2001)
> ==24123==    by 0x41BAAAE7: gtk_parse_args
> (/usr/src/debug/gtk+-3.6.4/gtk/gtkmain.c:952)
> ==24123==    by 0x41BAAB73: gtk_init_check
> (/usr/src/debug/gtk+-3.6.4/gtk/gtkmain.c:991)
> ==24123==    by 0x41BAABB3: gtk_init
> (/usr/src/debug/gtk+-3.6.4/gtk/gtkmain.c:1046)
>
> I installed the debuginfo packages to get the source file information.
> The leak is occurring at droute.c (indicated by the arrow, above):
>
>         pair = g_new (PropertyPair, 1); //<===== Line 234
>         pair->get = properties->get;
>         pair->set = properties->set;
>         g_hash_table_insert (path->properties, str_pair_new (itf, prop),
> pair); //<======
>
> The first arrow is where "pair" is allocated.  It gets stored into a hash
> table at the 2nd arrow.
> Either there is a duplicate insertion that is not being managed (deleting
> the original insertion), or
> the table is not being destroyed, or it is being destroyed but not managing
> its data.
>
> Most likely, I don't know the clean way of shutting down a gtkmm/gtk+
> session.
>
>
>
>
>
>
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