I have dug into this a bit, and found a likely culprit:
The hash table is being created at droute.c: 107
new_path-properties = g_hash_table_new_full ((GHashFunc)str_pair_hash,
str_pair_equal,
g_free,
NULL);
Sure enough, the value deallocator is set to NULL. I am sure there is a
good reason why it is not currently set to g_free, so I don't think that
would be a fix. (although, in this particular memory leak situation,
the pair is being allocated with g_new, so using g_free would work).
Perhaps, the values could be wrapped in Glib::RefPtr or std::shared_ptr,
or even the simpler std::unique_ptr.
I have CC'd the at-spi group, to get their feedback.
On 10/02/2013 10:47 PM, Andrew Potter wrote:
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 norm...@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::RefPtrGtk::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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