Hey, On Tue, Nov 25, 2014 at 02:28:01PM +0100, Fabiano Fidêncio wrote: > Return early instead of call gtk_widget_get_window() with a NULL window, > avoiding segfaults when running on windows using GTK3. > > Program received signal SIGSEGV, Segmentation fault. > _gdk_windows_has_impl <window=window@entry=0x0> at gdkwindow.c:584 > <gdb> bt > #0 _gdk_window_has_impl (window=window@entry=0x0) at gdkwindow.c:584 > #1 0x70f02821 in gdk_win32_window_get_handle (window=0x0) at > gdkwindow-win32.c:3459 > #2 0x00c759ef in update_display (display=0x1b18440) at > spice-widget.c:1297 > #3 0x00c77280 in focus_in_event (widget=0x1b18440, focus=0x1b02b68) at > spice-widget.c:1462
Hmm, do we get a focus-in event on a widget which does not have a
GdkWindow? this seems unexpected (?)
> #4 0x665727f5 in ?? () from C:\Program Files\VirtViewer
> (GTK3)\bin\libgtk-3-0.dll
> #5 0x00000000 in ?? ()
Small nit, it's not gtk_widget_get_window(NULL) which causes this crash,
but GDK_WINDOW_HWND(NULL)
The log accounts for the last hunk in this patch, what about the other
try_keyboard_grab part? Looking at focus_in_event, I guess it is the
same trace with s/update_display/try_keyboard_grab ?
Christophe
> ---
> Changes since v1:
> - Improve the commit message/shortlog
> - Use g_return_if_fail instead of g_warn_if_fail in update_display()
> ---
> gtk/spice-widget.c | 19 ++++++++++++++++---
> 1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/gtk/spice-widget.c b/gtk/spice-widget.c
> index ae11073..23aca93 100644
> --- a/gtk/spice-widget.c
> +++ b/gtk/spice-widget.c
> @@ -701,9 +701,12 @@ SpiceGrabSequence
> *spice_display_get_grab_keys(SpiceDisplay *display)
> static void try_keyboard_grab(SpiceDisplay *display)
> {
> GtkWidget *widget = GTK_WIDGET(display);
> + GdkWindow *window = gtk_widget_get_window(widget);
> SpiceDisplayPrivate *d = display->priv;
> GdkGrabStatus status;
>
> + g_return_if_fail(window != NULL);
> +
> if (g_getenv("SPICE_NOGRAB"))
> return;
> if (d->disable_inputs)
> @@ -731,8 +734,8 @@ static void try_keyboard_grab(SpiceDisplay *display)
> GetModuleHandle(NULL), 0);
> g_warn_if_fail(d->keyboard_hook != NULL);
> #endif
> - status = gdk_keyboard_grab(gtk_widget_get_window(widget), FALSE,
> - GDK_CURRENT_TIME);
> +
> + status = gdk_keyboard_grab(window, FALSE, GDK_CURRENT_TIME);
> if (status != GDK_GRAB_SUCCESS) {
> g_warning("keyboard grab failed %d", status);
> d->keyboard_grab_active = false;
> @@ -1294,7 +1297,17 @@ static gboolean check_for_grab_key(SpiceDisplay
> *display, int type, int keyval)
> static void update_display(SpiceDisplay *display)
> {
> #ifdef G_OS_WIN32
> - win32_window = display ?
> GDK_WINDOW_HWND(gtk_widget_get_window(GTK_WIDGET(display))) : NULL;
> + GdkWindow *window;
> +
> + win32_window = NULL;
> +
> + if (display == NULL)
> + return;
> +
> + window = gtk_widget_get_window(GTK_WIDGET(display));
> + g_return_if_fail (window != NULL);
> +
> + win32_window = GDK_WINDOW_HWND(window);
> #endif
> }
>
> --
> 2.1.0
>
> _______________________________________________
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> [email protected]
> http://lists.freedesktop.org/mailman/listinfo/spice-devel
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