small GTK test program crashes after 3 days

["Brian Ford" <bford rossvideo com>]

I am having a problem with my gtk program doing a seg fault after
running for a long period of time.  My application redraws the screen
with quite a high frequency.  I decided to to creating a tiny test
program that simply sets icons on a toolbar over and over to see if I
could replicate the problem my application is having.  After almost 3
days my test gtk program segfault'ed in the same manner.  It does not
seem to be a memory leak as the memory usage of the program did not grow
over time.

 

 

I am using Fedora Core 6 and all the standard GTK, Glib libraries that
it contained, i.e. GTK 2.10.8

When I tried this on a PC running Fedora8 and a new gtk library I did
not see the issue but perhaps it just takes longer before it would
crash.

 

Here is the backtrace:

Core was generated by `./gtktest'.

Program terminated with signal 11, Segmentation fault.

#0  0xb79d864e in gdk_region_destroy () from
/usr/lib/libgdk-x11-2.0.so.0

(gdb) bt

#0  0xb79d864e in gdk_region_destroy () from
/usr/lib/libgdk-x11-2.0.so.0

#1  0xb79f3890 in gdk_x11_gc_get_xdisplay () from
/usr/lib/libgdk-x11-2.0.so.0

#2  0xb79f3baf in gdk_x11_gc_get_xdisplay () from
/usr/lib/libgdk-x11-2.0.so.0

#3  0xb79f3c65 in gdk_x11_gc_get_xdisplay () from
/usr/lib/libgdk-x11-2.0.so.0

#4  0xb79db53f in gdk_window_is_viewable () from
/usr/lib/libgdk-x11-2.0.so.0

#5  0xb79db877 in gdk_window_process_all_updates ()

   from /usr/lib/libgdk-x11-2.0.so.0

#6  0xb7c0d712 in gtk_container_check_resize ()

   from /usr/lib/libgtk-x11-2.0.so.0

#7  0xb780d6e1 in g_source_is_destroyed () from /lib/libglib-2.0.so.0

#8  0xb780f442 in g_main_context_dispatch () from /lib/libglib-2.0.so.0

#9  0xb781241f in g_main_context_check () from /lib/libglib-2.0.so.0

#10 0xb7812985 in g_main_context_iteration () from /lib/libglib-2.0.so.0

#11 0xb7c9e2b3 in gtk_main_iteration_do () from
/usr/lib/libgtk-x11-2.0.so.0

#12 0x08048ce9 in main ()

 

 

Here is the code for my test program..  I used glade to create the
window and a toolbar with three buttons on it.  I can provide the glade
file if anyone wants it.

 

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <gdk/gdkx.h>

#include <gtk/gtk.h>

#include <glade/glade.h>

 

extern GtkWidget *tool_button[3];

static int x = 0;

 

GtkWidget *MainWindow;

GtkWidget *tool_button[3];

 

gboolean UpdateToolbar(gpointer data)

{

   

   if(++x > 3)

      x = 0;

   

   switch(x)

   {

      default:

      case 0:

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[0]),

                                       GTK_STOCK_MEDIA_STOP);

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[1]),

                                       GTK_STOCK_NETWORK);

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[2]),

                                       GTK_STOCK_JUSTIFY_RIGHT);

         break;

      case 1:

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[0]),

                                       GTK_STOCK_SAVE);

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[1]),

                                       GTK_STOCK_UNDO);

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[2]),

                                       GTK_STOCK_ZOOM_IN);

         break;

      case 2:

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[0]),

                                       GTK_STOCK_ZOOM_OUT);

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[1]),

                                       GTK_STOCK_YES);

         gtk_tool_button_set_stock_id (GTK_TOOL_BUTTON(tool_button[2]),

                                       GTK_STOCK_OPEN);

         break;

   }                                 

}

 

 

int main(int argc, char*argv[])

{   

   int i;

   GladeXML *xml;

   

   gtk_init(&argc, &argv);

   glade_init();

   

   xml = glade_xml_new("gtktest.glade", "MainWindow", NULL);

   glade_xml_signal_autoconnect(xml);

   

   MainWindow = glade_xml_get_widget(xml, "MainWindow");

   

   tool_button[0] = glade_xml_get_widget(xml, "toolbutton1");

   tool_button[1] = glade_xml_get_widget(xml, "toolbutton2");

   tool_button[2] = glade_xml_get_widget(xml, "toolbutton3");

   

   g_object_unref( G_OBJECT(xml) );

   

   while(1)

   {

      UpdateToolbar(NULL);

      gtk_main_iteration_do(0);

   }

   

   return 0;

}