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turn off composite on segfault. 

one of the most annoying problems while using bling is that when E
segfaults it will launch an alert window, but since composite manager
is using the same process/connection as e17, it will not die and e
will not compose as required, so you basically end with a black
screen.

this patch will forcely turn off manual redirection and you'll get the
white-screen-of-death, being able to restart e17.

future: if we really do composite in e18, then please handle this in a
better way.



SVN revision: 39741
This commit is contained in:
Gustavo Sverzut Barbieri 2009-03-27 02:23:13 +00:00
parent bf4237f22c
commit 092f3e4974
1 changed files with 25 additions and 0 deletions
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25
src/bin/e_signals.c
View File

@ -5,6 +5,25 @@
* to add backtrace support.
*/
#include "e.h"
#include <X11/Xlib.h>
static volatile Eina_Bool _e_x_composite_shutdown_try = 0;
static void
_e_x_composite_shutdown(void)
{
Ecore_X_Display *dpy;
Ecore_X_Window root;
if (_e_x_composite_shutdown_try) return; /* we failed :-( */
_e_x_composite_shutdown_try = 1;
dpy = ecore_x_display_get();
root = DefaultRootWindow(dpy);
/* ignore errors, we really don't care at this point */
ecore_x_composite_unredirect_subwindows(root, ECORE_X_COMPOSITE_UPDATE_MANUAL);
_e_x_composite_shutdown_try = 0;
}
#ifdef OBJECT_PARANOIA_CHECK
@ -21,6 +40,7 @@ e_sigseg_act(int x, siginfo_t *info, void *data)
write(2, "**** Printing Backtrace... *****\n\n", 34);
size = backtrace(array, 255);
backtrace_symbols_fd(array, size, 2);
_e_x_composite_shutdown();
ecore_x_pointer_ungrab();
ecore_x_keyboard_ungrab();
ecore_x_ungrab();
@ -41,6 +61,7 @@ EAPI void
e_sigseg_act(int x, siginfo_t *info, void *data)
{
write(2, "**** SEGMENTATION FAULT ****\n", 29);
_e_x_composite_shutdown();
ecore_x_pointer_ungrab();
ecore_x_keyboard_ungrab();
ecore_x_ungrab();
@ -62,6 +83,7 @@ EAPI void
e_sigill_act(int x, siginfo_t *info, void *data)
{
write(2, "**** ILLEGAL INSTRUCTION ****\n", 30);
_e_x_composite_shutdown();
ecore_x_pointer_ungrab();
ecore_x_keyboard_ungrab();
ecore_x_ungrab();
@ -82,6 +104,7 @@ EAPI void
e_sigfpe_act(int x, siginfo_t *info, void *data)
{
write(2, "**** FLOATING POINT EXCEPTION ****\n", 35);
_e_x_composite_shutdown();
ecore_x_pointer_ungrab();
ecore_x_keyboard_ungrab();
ecore_x_ungrab();
@ -102,6 +125,7 @@ EAPI void
e_sigbus_act(int x, siginfo_t *info, void *data)
{
write(2, "**** BUS ERROR ****\n", 21);
_e_x_composite_shutdown();
ecore_x_pointer_ungrab();
ecore_x_keyboard_ungrab();
ecore_x_ungrab();
@ -122,6 +146,7 @@ EAPI void
e_sigabrt_act(int x, siginfo_t *info, void *data)
{
write(2, "**** ABORT ****\n", 21);
_e_x_composite_shutdown();
ecore_x_pointer_ungrab();
ecore_x_keyboard_ungrab();
ecore_x_ungrab();