From a9872aac5af98ac5a643304b062aa984c4642f97 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sun, 11 Jul 2021 10:01:22 +0200
Subject: [PATCH] wayland: explicitly purge all SHM pixmaps when destroying
 window
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All SHM pixmap cookies depend on the terminal instance’s memory
address. Thus, after a terminal instance has been destroyed, shm
pixmaps that belonged to it will never be purged automatically.
---
 wayland.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/wayland.c b/wayland.c
index bea6fb52..ed3ddffd 100644
--- a/wayland.c
+++ b/wayland.c
@@ -1475,6 +1475,14 @@ wayl_win_destroy(struct wl_window *win)
     wayl_win_subsurface_destroy(&win->scrollback_indicator);
     wayl_win_subsurface_destroy(&win->render_timer);
 
+    shm_purge(shm, shm_cookie_search(term));
+    shm_purge(shm, shm_cookie_scrollback_indicator(term));
+    shm_purge(shm, shm_cookie_render_timer(term));
+    shm_purge(shm, shm_cookie_grid(term));
+
+    for (size_t i = 0; i < ALEN(win->csd.surface); i++)
+        shm_purge(shm, shm_cookie_csd(term, i));
+
 #if defined(HAVE_XDG_ACTIVATION)
     if (win->xdg_activation_token != NULL)
         xdg_activation_token_v1_destroy(win->xdg_activation_token);