pango_font_description_copy Segmentation fault
Hi,
I wonder how pango_font_description_copy make a segmentation
fault, I use it like this:
/pango_font_description_free(priv-current_font);
priv-current_font =
pango_font_description_copy(priv-default_font);/
default_font comes from:
/priv-default_font = gtk_style_context_get_font(context,
GTK_STATE_FLAG_NORMAL);/
almost everytime I want to change to default font, it cause a
segmentation fault:
/ Program terminated with signal 11, Segmentation fault.
#0 0x7ff7e2e86b91 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0 0x7ff7e2e86b91 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x7ff7e321d2d2 in g_strdup ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x7ff7e21834ee in pango_font_description_copy ()
from /usr/lib/x86_64-linux-gnu/libpango-1.0.so.0
#3 0x7ff7e4d0e84b in xmr_label_set_font (label=0x19baea0,
font=0x0)
at /media/workspace/projects/xmradio/src/xmrlabel.c:390/
I try to check out the pango source code:
/PangoFontDescription *
pango_font_description_copy (const PangoFontDescription *desc)
{
PangoFontDescription *result;
if (desc == NULL)
return NULL;
result = g_slice_new (PangoFontDescription);
*result = *desc;
if (result-family_name)
{
result-family_name = g_strdup (result-family_name);
result-static_family = FALSE;
}
return result;
}/
but nothing odd.
Any idea?
Thanks in advance.
--
Weitian
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Re: Open file from menu
Will anyone kindly show the way? -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. Rudra Banerjee bnrj.ru...@yahoo.com wrote: Dear friends, I am trying to create a textview that will show the file opens. I have managed to make it read the commandline argument as: stat(argv[1], filestat); buffer = (char *) malloc(filestat.st_size * sizeof (char)); efile = fopen(argv[1], r); fread(buffer, filestat.st_size, 1, efile); gtk_text_buffer_set_text(textbuffer, buffer, filestat.st_size); free(buffer); But I am facing 2 problem(2nd problem is more important to solve). 1) putting the above block inside if (argv[1] != NULL) is giving a segmentation fault: [Thread debugging using libthread_db enabled] Using host libthread_db library /lib64/libthread_db.so.1. Program received signal SIGSEGV, Segmentation fault. 0x00364066c81e in fread () from /lib64/libc.so.6 and 2) How I can open the file using file menu, instead of commandline argument? I have defined the menu as follows: file = gtk_menu_item_new_with_mnemonic(_File); new = gtk_image_menu_item_new_from_stock(GTK_STOCK_NEW, accel_group); open = gtk_image_menu_item_new_from_stock(GTK_STOCK_OPEN, accel_group); sep = gtk_separator_menu_item_new(); quit = gtk_image_menu_item_new_from_stock(GTK_STOCK_QUIT, accel_group); gtk_menu_item_set_submenu(GTK_MENU_ITEM(file), filemenu); gtk_menu_shell_append(GTK_MENU_SHELL(filemenu), new); gtk_menu_shell_append(GTK_MENU_SHELL(filemenu), open); gtk_menu_shell_append(GTK_MENU_SHELL(filemenu), sep); gtk_menu_shell_append(GTK_MENU_SHELL(filemenu), quit); gtk_menu_shell_append(GTK_MENU_SHELL(menubar), file); gtk_box_pack_start(GTK_BOX(vbox), menubar, FALSE, FALSE, 3); g_signal_connect(G_OBJECT(new), activate, G_CALLBACK(filenew_activated), (gpointer) window); g_signal_connect(G_OBJECT(open), activate, G_CALLBACK(fileopen_activated), (gpointer) window); g_signal_connect_swapped(G_OBJECT(window), destroy, G_CALLBACK(gtk_main_quit), NULL); g_signal_connect(G_OBJECT(quit), activate, G_CALLBACK(gtk_main_quit), NULL); which is opening the file selector, but *NOT* writing it in the textview. I wish to open the file in textview and save it aswell after I edit that. If anyone kindly show the how-to, I can put problem (1) to solve later. Please help. _ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Open file from menu
Rudra Banerjee wrote: 1) putting the above block inside if (argv[1] != NULL) is giving a segmentation fault: Are you checking argc? If you are not passing an argument argv[1] does not exist so, yes, you will get a segfault for running beyond the argv[] array. if ( argc 1 argv[1] != NULL ) foo else return 0; and 2) How I can open the file using file menu, instead of commandline argument? I have defined the menu as follows: [snip] which is opening the file selector, but *NOT* writing it in the textview. I wish to open the file in textview and save it aswell after I edit that. Are you checking for a filename returned from the file chooser dialog? You are going to need more code to do what you want. GTK won't do it automatically for you. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Open file from menu
On Tue, 2012-07-10 at 00:55 +0530, Rudra Banerjee wrote: Will anyone kindly show the way? stat(argv[1], filestat); buffer = (char *) malloc(filestat.st_size * sizeof (char)); efile = fopen(argv[1], r); fread(buffer, filestat.st_size, 1, efile); gtk_text_buffer_set_text(textbuffer, buffer, filestat.st_size); free(buffer); In C you need to check the return status of all system calls. As Michael already said, first make sure argc 1; if a filename was given, make sure that filestat is a struct stat: struct stat filestat; Make sure the malloc() successed - if there's not enoug hmemory it'll return NULL. Make sure the fopen() succeeded; it too will return NULL on failure. Strictly speaking you should close the file, too, with fclose(efile), and check that worked and also check that the free() was OK, if only to help you catch programming errors! Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org freenode/#xml ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Open file from menu
On Mon, Jul 09, 2012 at 03:40:11PM -0400, Liam R E Quin wrote: also check that the free() was OK I wonder how you do that (apart from not getting any glibc MALLOC_CHECK_ error message or similar). Yeti ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Open file from menu
On Mon, 2012-07-09 at 22:01 +0200, David Nečas wrote: On Mon, Jul 09, 2012 at 03:40:11PM -0400, Liam R E Quin wrote: also check that the free() was OK I wonder how you do that (apart from not getting any glibc MALLOC_CHECK_ error message or similar). There's no portable way to do it really, you're right. In the past I've written wrappers for malloc() and free() and realloc() to make sure everything passed to free actually came from malloc or one of her friends, and on some systems there are also calls to check the heap. Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org freenode/#xml ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
