Fix potential memory leak of two pointers (xwayland and client)

This backports four patches from weston to solve a memory leak problem
These four patches are:
https://gitlab.freedesktop.org/wayland/weston/-/commit/5a6604a7a2e52e5cd84c1f53724b3f7c325b5dff.patch
https://gitlab.freedesktop.org/wayland/weston/-/commit/f53c05d3c2c19c139c52e9bd621c2654dd3dac69.patch
https://gitlab.freedesktop.org/wayland/weston/-/commit/e2583ca0844bd7a8ce4fc94da9ad67edf49ffd45.patch
https://gitlab.freedesktop.org/wayland/weston/-/commit/8740037a93c7c4400cc381ecf3009d1e4014be07.patch

The following is the valgrind log:
 160  bytes in 1 blocks are definitely lost in loss record 39 of 66
     at 0x484B64C: calloc (in /usr/lib/valgrind/vgpreload_memcheck-arm64-linux.so)
     by 0x4A73C87: ??? (in /usr/lib/libweston-desktop-8.so.0.0.0)
     by 0x4A7184F: weston_desktop_create (in /usr/lib/libweston-desktop-8.so.0.0.0)
     by 0x487096B: ivi_desktop_init (in /usr/lib/agl-compositor/libexec_compositor.so.0.0.0)
     by 0x486F5E7: wet_main (in /usr/lib/agl-compositor/libexec_compositor.so.0.0.0)
     by 0x48B010F: (below main) (in /lib/libc-2.31.so)

In agl-compositor/src/composiotr.c
"ivi->desktop->compositor->xwayland" is zalloced by
wet_main()->ivi_desktop_init()->weston_desktop_create()->weston_desktop_xwayland_init()
"ivi->desktop->compositor->xwayland->client" is zalloced by
wet_main()->ivi_desktop_init()->weston_desktop_create()->weston_desktop_xwayland_init()->weston_desktop_client_create()

"ivi->desktop->compositor->xwayland" and
"ivi->desktop->compositor->xwayland->client"
The memory pointed to has not been released
Now, I want to free the memory pointed by the two pointers.
What can do this is the function of weston_desktop_xwayland_fini() in
0003-libweston-desktop-add-weston_desktop_xwayland_fini.patch
And the submission of this patch depends on the first three patches,
so I submitted these four patches.

Bug-AGL: SPEC-4291

Signed-off-by: duerpei <duep.fnst@fujitsu.com>
Change-Id: I3b1140e88eadad9e378c2bb43221026e280ecd90
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27257
Reviewed-by: Marius Vlad <marius.vlad@collabora.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jenkins Job builder account

1 files changed, 51 insertions, 0 deletions

diff --git a/meta-agl-core/recipes-graphics/wayland/weston/0001-libweston-desktop-rename-weston_desktop_client_destr.patch b/meta-agl-core/recipes-graphics/wayland/weston/0001-libweston-desktop-rename-weston_desktop_client_destr.patch
new file mode 100644
index 000000000..5332a89b0
--- /dev/null
+++ b/meta-agl-core/recipes-graphics/wayland/weston/0001-libweston-desktop-rename-weston_desktop_client_destr.patch
@@ -0,0 +1,51 @@
+From 5a6604a7a2e52e5cd84c1f53724b3f7c325b5dff Mon Sep 17 00:00:00 2001
+From: Pekka Paalanen <pekka.paalanen@collabora.com>
+Upstream-Status: Backport
+Date: Fri, 14 May 2021 15:54:56 +0300
+Subject: [PATCH] libweston-desktop: rename weston_desktop_client_destroy()
+
+This function here is a wl_resource destructor, but we will need another
+function for externally triggered destroy when wl_resource does not
+exist.
+
+Rename the existing function, because the old name fits better the new
+function to be written.
+
+Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
+---
+ libweston-desktop/client.c | 9 ++++-----
+ 1 file changed, 4 insertions(+), 5 deletions(-)
+
+diff --git a/libweston-desktop/client.c b/libweston-desktop/client.c
+index 56413f713..ba7bfbc46 100644
+--- a/libweston-desktop/client.c
++++ b/libweston-desktop/client.c
+@@ -49,7 +49,7 @@ weston_desktop_client_add_destroy_listener(struct weston_desktop_client *client,
+ }
+ 
+ static void
+-weston_desktop_client_destroy(struct wl_resource *resource)
++weston_desktop_client_handle_destroy(struct wl_resource *resource)
+ {
+ 	struct weston_desktop_client *client =
+ 		wl_resource_get_user_data(resource);
+@@ -117,13 +117,12 @@ weston_desktop_client_create(struct weston_desktop *desktop,
+ 
+ 	if (dispatcher != NULL)
+ 		wl_resource_set_dispatcher(client->resource, dispatcher,
+-					   weston_desktop_client_destroy, client,
+-					   weston_desktop_client_destroy);
++					   weston_desktop_client_handle_destroy, client,
++					   weston_desktop_client_handle_destroy);
+ 	else
+ 		wl_resource_set_implementation(client->resource, implementation,
+ 					       client,
+-					       weston_desktop_client_destroy);
+-
++					       weston_desktop_client_handle_destroy);
+ 
+ 	display = wl_client_get_display(client->client);
+ 	loop = wl_display_get_event_loop(display);
+-- 
+GitLab
+