From 526486da6be424b055a8e988b7f2e95625a696c6 Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Wed, 25 Oct 2017 12:29:43 +0200
Subject: [PATCH] gdk: Use allocated events

Stack allocated GdkEvent structs will not be ok when events become
objects.
---
 gdk/gdkevents.c | 23 +++++++++++++----------
 gdk/gdkwindow.c | 17 +++++++++--------
 2 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/gdk/gdkevents.c b/gdk/gdkevents.c
index 04e350db79..18e45447c2 100644
--- a/gdk/gdkevents.c
+++ b/gdk/gdkevents.c
@@ -1869,20 +1869,21 @@ _gdk_set_window_state (GdkWindow      *window,
                        GdkWindowState  new_state)
 {
   GdkDisplay *display = gdk_window_get_display (window);
-  GdkEvent temp_event;
+  GdkEvent *temp_event;
   GdkWindowState old;
   GList *pending_event_link;
 
   g_return_if_fail (window != NULL);
 
-  temp_event.any.window = window;
-  temp_event.any.type = GDK_WINDOW_STATE;
-  temp_event.any.send_event = FALSE;
-  temp_event.window_state.new_window_state = new_state;
-
-  if (temp_event.window_state.new_window_state == window->state)
+  if (new_state == window->state)
     return; /* No actual work to do, nothing changed. */
 
+  temp_event = gdk_event_new (GDK_WINDOW_STATE);
+
+  temp_event->any.window = g_object_ref (window);
+  temp_event->any.send_event = FALSE;
+  temp_event->window_state.new_window_state = new_state;
+
   pending_event_link = gdk_get_pending_window_state_event_link (window);
   if (pending_event_link)
     {
@@ -1897,7 +1898,7 @@ _gdk_set_window_state (GdkWindow      *window,
       window->old_state = old;
     }
 
-  temp_event.window_state.changed_mask = new_state ^ old;
+  temp_event->window_state.changed_mask = new_state ^ old;
 
   /* Actually update the field in GdkWindow, this is sort of an odd
    * place to do it, but seems like the safest since it ensures we expose no
@@ -1906,7 +1907,7 @@ _gdk_set_window_state (GdkWindow      *window,
 
   window->state = new_state;
 
-  if (temp_event.window_state.changed_mask & GDK_WINDOW_STATE_WITHDRAWN)
+  if (temp_event->window_state.changed_mask & GDK_WINDOW_STATE_WITHDRAWN)
     _gdk_window_update_viewable (window);
 
   /* We only really send the event to toplevels, since
@@ -1918,7 +1919,7 @@ _gdk_set_window_state (GdkWindow      *window,
     {
     case GDK_WINDOW_TOPLEVEL:
     case GDK_WINDOW_TEMP: /* ? */
-      gdk_display_put_event (display, &temp_event);
+      gdk_display_put_event (display, temp_event);
       break;
     case GDK_WINDOW_FOREIGN:
     case GDK_WINDOW_ROOT:
@@ -1926,6 +1927,8 @@ _gdk_set_window_state (GdkWindow      *window,
     default:
       break;
     }
+
+  gdk_event_free (temp_event);
 }
 
 void
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index f9b8e5e718..f950596412 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -2525,7 +2525,7 @@ _gdk_window_process_updates_recurse (GdkWindow *window,
                                      cairo_region_t *expose_region)
 {
   cairo_region_t *clipped_expose_region;
-  GdkEvent event;
+  GdkEvent *event;
 
   if (window->destroyed)
     return;
@@ -2539,14 +2539,15 @@ _gdk_window_process_updates_recurse (GdkWindow *window,
 
   /* Paint the window before the children, clipped to the window region */
 
-  event.any.type = GDK_EXPOSE;
-  event.any.window = window; /* we already hold a ref */
-  event.any.send_event = FALSE;
-  event.expose.count = 0;
-  event.expose.region = clipped_expose_region;
-  cairo_region_get_extents (clipped_expose_region, &event.expose.area);
+  event = gdk_event_new (GDK_EXPOSE);
+  event->any.window = g_object_ref (window);
+  event->any.send_event = FALSE;
+  event->expose.count = 0;
+  event->expose.region = cairo_region_reference (clipped_expose_region);
+  cairo_region_get_extents (clipped_expose_region, &event->expose.area);
 
-  _gdk_event_emit (&event);
+  _gdk_event_emit (event);
+  gdk_event_free (event);
 
  out:
   cairo_region_destroy (clipped_expose_region);
-- 
2.30.2