Re: How many times can I call gtk_label_set_markup()?

[Igor Korot <ikorot01 gmail com>]

Richard,

On Fri, Apr 8, 2011 at 11:07 AM, richard boaz <ivor boaz gmail com> wrote:
> yes, one can only conclude that you are using global variables for data that
> changes over time.  -r

Nothing changes.
Besides there is no NULL pointer dereferencing...

Thank you.

>
> On Fri, Apr 8, 2011 at 8:00 PM, Igor Korot <ikorot01 gmail com> wrote:
>>
>> Hi, David,
>>
>> 2011/4/8 David Nečas <yeti physics muni cz>:
>> > On Fri, Apr 08, 2011 at 10:30:32AM -0700, Igor Korot wrote:
>> >> $ ./<program_name> G_DEBUG=fatal-warnings
>> >>
>> >> Right?
>> >
>> > No,
>> >
>> >    G_DEBUG=fatal-warnings ./program
>> >
>> > It's an environment variable:
>> >
>> >    http://developer.gnome.org/glib/stable/glib-running.html
>>
>> I just tried to run it. Here are the results:
>>
>> IgorsGentooOnNetwork src # G_DEBUG=fatal-warnings gdb mini2440gtk
>> GNU gdb 6.8
>> Copyright (C) 2008 Free Software Foundation, Inc.
>> License GPLv3+: GNU GPL version 3 or later
>> <http://gnu.org/licenses/gpl.html>
>> This is free software: you are free to change and redistribute it.
>> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
>> and "show warranty" for details.
>> This GDB was configured as "i686-pc-linux-gnu"...
>> (gdb) break main_window.cc:282
>> Breakpoint 1 at 0x80496d4: file
>> /home/igor/mini2440gtk/mini2440gtk/src/main_window.cc, line 282.
>> (gdb) run
>> Starting program: /home/igor/mini2440gtk/mini2440gtk/debug/src/mini2440gtk
>> [Thread debugging using libthread_db enabled]
>> [New Thread 0xb7106b40 (LWP 22539)]
>> Header is: 0 0
>> Header is: 27 91
>>
>> GLib-GObject-WARNING **: invalid cast from `(null)' to `GObject'
>> aborting...
>>
>> Program received signal SIGABRT, Aborted.
>> [Switching to Thread 0xb7106b40 (LWP 22539)]
>> 0xb805c424 in __kernel_vsyscall ()
>> (gdb) bt
>> #0  0xb805c424 in __kernel_vsyscall ()
>> #1  0xb7169660 in raise () from /lib/libc.so.6
>> #2  0xb716ae98 in abort () from /lib/libc.so.6
>> #3  0xb73d4a31 in g_logv () from /usr/lib/libglib-2.0.so.0
>> #4  0xb73d4ace in g_log () from /usr/lib/libglib-2.0.so.0
>> #5  0xb7477896 in g_type_check_instance_cast () from
>> /usr/lib/libgobject-2.0.so.0
>> #6  0xb7a14e9c in gtk_label_set_markup () from
>> /usr/lib/libgtk-x11-2.0.so.0
>> #7  0x080496d4 in CFrame::UpdateData (this=0x8f48450) at
>> /home/igor/mini2440gtk/mini2440gtk/src/main_window.cc:281
>> #8  0x08049813 in CFrame::ReadData (me=0x8f48450) at
>> /home/igor/mini2440gtk/mini2440gtk/src/main_window.cc:256
>> #9  0xb73cdad2 in ?? () from /usr/lib/libglib-2.0.so.0
>> #10 0x08f48450 in ?? ()
>> #11 0xb7452534 in ?? () from /usr/lib/libglib-2.0.so.0
>> #12 0xbfde3dd8 in ?? ()
>> #13 0xb73cda9f in ?? () from /usr/lib/libglib-2.0.so.0
>> #14 0xb7856f00 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
>> #15 0x08f1b008 in ?? ()
>> #16 0xbfde3e08 in ?? ()
>> #17 0xb73ccb5c in ?? () from /usr/lib/libglib-2.0.so.0
>> #18 0xb7452534 in ?? () from /usr/lib/libglib-2.0.so.0
>> #19 0x08f22098 in ?? ()
>> #20 0xbfde3df8 in ?? ()
>> #21 0xb7451ff4 in ?? () from /usr/lib/libglib-2.0.so.0
>> #22 0xbfde3e3c in ?? ()
>> #23 0x08f4fc00 in ?? ()
>> #24 0xbfde3e58 in ?? ()
>> #25 0xb73cd1b9 in g_main_context_dispatch () from
>> /usr/lib/libglib-2.0.so.0
>> Backtrace stopped: previous frame inner to this frame (corrupt stack?)
>>
>> Running the program without G_DEBUG gives:
>>
>> IgorsGentooOnNetwork src # gdb mini2440gtk
>> GNU gdb 6.8
>> Copyright (C) 2008 Free Software Foundation, Inc.
>> License GPLv3+: GNU GPL version 3 or later
>> <http://gnu.org/licenses/gpl.html>
>> This is free software: you are free to change and redistribute it.
>> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
>> and "show warranty" for details.
>> This GDB was configured as "i686-pc-linux-gnu"...
>> (gdb) break main_window.cc:282
>> Breakpoint 1 at 0x80496d4: file
>> /home/igor/mini2440gtk/mini2440gtk/src/main_window.cc, line 282.
>> (gdb) run
>> Starting program: /home/igor/mini2440gtk/mini2440gtk/debug/src/mini2440gtk
>> [Thread debugging using libthread_db enabled]
>> [New Thread 0xb70d6b40 (LWP 22570)]
>> Header is: 0 0
>> Header is: 27 91
>>
>> (mini2440gtk:22570): GLib-GObject-WARNING **: invalid cast from
>> `(null)' to `GObject'
>>
>> (mini2440gtk:22570): GLib-GObject-CRITICAL **: g_object_freeze_notify:
>> assertion `G_IS_OBJECT (object)' failed
>>
>> (mini2440gtk:22570): GLib-GObject-WARNING **: invalid cast from
>> `(null)' to `GObject'
>>
>> (mini2440gtk:22570): GLib-GObject-CRITICAL **: g_object_notify:
>> assertion `G_IS_OBJECT (object)' failed
>>
>> (mini2440gtk:22570): GLib-GObject-WARNING **: invalid cast from
>> `(null)' to `GtkWidget'
>>
>> (mini2440gtk:22570): Gtk-CRITICAL **: gtk_widget_queue_resize:
>> assertion `GTK_IS_WIDGET (widget)' failed
>>
>> (mini2440gtk:22570): GLib-GObject-WARNING **: invalid cast from
>> `(null)' to `GObject'
>>
>> (mini2440gtk:22570): GLib-GObject-CRITICAL **: g_object_thaw_notify:
>> assertion `G_IS_OBJECT (object)' failed
>> [Switching to Thread 0xb70d6b40 (LWP 22570)]
>>
>> Breakpoint 1, CFrame::UpdateData (this=0x94e1450) at
>> /home/igor/mini2440gtk/mini2440gtk/src/main_window.cc:282
>> 282             gtk_label_set_markup( GTK_LABEL( data2 ), m_data2->str );
>> (gdb) print data1
>> $1 = (GtkWidget *) 0x94e80b0
>> (gdb) print m_data1->str
>> $2 = (gchar *) 0x94dfee0 "<b><span foreground=\"black\"><span
>> font=\"Sans Serif\"><span font='48'>14.00</span></span>V</span></b>"
>>
>> And here is the code for offending function:
>>
>> void CFrame::UpdateData()
>> {
>>        ConvertTotalPack();
>>        ConvertMinimalVoltage();
>>        ConvertMaximumVoltage();
>>        SetColoring();
>>        gtk_label_set_markup( GTK_LABEL( data1 ), m_data1->str );
>>        gtk_label_set_markup( GTK_LABEL( data2 ), m_data2->str );
>>        gtk_label_set_markup( GTK_LABEL( data3 ), m_data3->str );
>>        gtk_label_set_markup( GTK_LABEL( data4 ), m_data4->str );
>> }
>>
>> Do you see anything wrong with it?
>>
>> Thank you.
>>
>> >
>> > Yeti
>> >
>> >
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>
>