Function

GLib-2.0 ▶ GLib ▶ on_error_query

  • Prompts the user with [E]xit, [H]alt, show [S]tack trace or [P]roceed. This function is intended to be used for debugging use only. The following example shows how it can be used together with the g_log() functions.

    #include <glib.h>

    static void
    log_handler (const gchar   *log_domain,
                 GLogLevelFlags log_level,
                 const gchar   *message,
                 gpointer       user_data)
    {
      g_log_default_handler (log_domain, log_level, message, user_data);

      g_on_error_query (MY_PROGRAM_NAME);
    }

    int
    main (int argc, char *argv[])
    {
      g_log_set_handler (MY_LOG_DOMAIN,
                         G_LOG_LEVEL_WARNING |
                         G_LOG_LEVEL_ERROR |
                         G_LOG_LEVEL_CRITICAL,
                         log_handler,
                         NULL);
      ...

    If "[E]xit" is selected, the application terminates with a call to _exit(0).

    If "[S]tack" trace is selected, g_on_error_stack_trace() is called. This invokes gdb, which attaches to the current process and shows a stack trace. The prompt is then shown again.

    If "[P]roceed" is selected, the function returns.

    This function may cause different actions on non-UNIX platforms.

    On Windows consider using the G_DEBUGGER environment variable (see Running GLib Applications) and calling g_on_error_stack_trace() instead.

    Parameters

    • prg_name: string

      the program name, needed by gdb for the "[S]tack trace" option. If prg_name is null, g_get_prgname() is called to get the program name (which will work correctly if gdk_init() or gtk_init() has been called)

    Returns void