tests: add basic -display dbus Map.Unix test

Only check we eventually get a shared memory scanout.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-ID: <20241008125028.1177932-20-marcandre.lureau@redhat.com>

tests/qtest/dbus-display-test.c

@@ -2,9 +2,14 @@
 #include "qemu/sockets.h"
 #include "qemu/dbus.h"
 #include "qemu/sockets.h"
+#include "glib.h"
+#include "glibconfig.h"
 #include <gio/gio.h>
 #include <gio/gunixfdlist.h>
 #include "libqtest.h"
+#ifndef WIN32
+#include <sys/mman.h>
+#endif
 #include "ui/dbus-display1.h"
 
 static GDBusConnection*
@@ -82,6 +87,7 @@ typedef struct TestDBusConsoleRegister {
     GThread *thread;
     GDBusConnection *listener_conn;
     GDBusObjectManagerServer *server;
+    bool with_map;
 } TestDBusConsoleRegister;
 
 static gboolean listener_handle_scanout(
@@ -94,13 +100,49 @@ static gboolean listener_handle_scanout(
     GVariant *arg_data,
     TestDBusConsoleRegister *test)
 {
+    if (!test->with_map) {
+        g_main_loop_quit(test->loop);
+    }
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+#ifndef WIN32
+static gboolean listener_handle_scanout_map(
+    QemuDBusDisplay1ListenerUnixMap *object,
+    GDBusMethodInvocation *invocation,
+    GUnixFDList *fd_list,
+    GVariant *arg_handle,
+    guint arg_offset,
+    guint arg_width,
+    guint arg_height,
+    guint arg_stride,
+    guint arg_pixman_format,
+    TestDBusConsoleRegister *test)
+{
+    int fd = -1;
+    gint32 handle = g_variant_get_handle(arg_handle);
+    g_autoptr(GError) error = NULL;
+    void *addr = NULL;
+    size_t len = arg_height * arg_stride;
+
+    g_assert_cmpuint(g_unix_fd_list_get_length(fd_list), ==, 1);
+    fd = g_unix_fd_list_get(fd_list, handle, &error);
+    g_assert_no_error(error);
+
+    addr = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, arg_offset);
+    g_assert_no_errno(addr == MAP_FAILED ? -1 : 0);
+    g_assert_no_errno(munmap(addr, len));
+
     g_main_loop_quit(test->loop);
 
+    close(fd);
     return DBUS_METHOD_INVOCATION_HANDLED;
 }
+#endif
 
 static void
-test_dbus_console_setup_listener(TestDBusConsoleRegister *test)
+test_dbus_console_setup_listener(TestDBusConsoleRegister *test, bool with_map)
 {
     g_autoptr(GDBusObjectSkeleton) listener = NULL;
     g_autoptr(QemuDBusDisplay1ListenerSkeleton) iface = NULL;
@@ -114,6 +156,25 @@ test_dbus_console_setup_listener(TestDBusConsoleRegister *test)
                      NULL);
     g_dbus_object_skeleton_add_interface(listener,
                                          G_DBUS_INTERFACE_SKELETON(iface));
+    if (with_map) {
+#ifdef WIN32
+        g_test_skip("map test lacking on win32");
+        return;
+#else
+        g_autoptr(QemuDBusDisplay1ListenerUnixMapSkeleton) iface_map =
+            QEMU_DBUS_DISPLAY1_LISTENER_UNIX_MAP_SKELETON(
+                qemu_dbus_display1_listener_unix_map_skeleton_new());
+
+        g_object_connect(iface_map,
+                         "signal::handle-scanout-map", listener_handle_scanout_map, test,
+                         NULL);
+        g_dbus_object_skeleton_add_interface(listener,
+                                             G_DBUS_INTERFACE_SKELETON(iface_map));
+        g_object_set(iface, "interfaces",
+            (const gchar *[]) { "org.qemu.Display1.Listener.Unix.Map", NULL },
+            NULL);
+#endif
+    }
     g_dbus_object_manager_server_export(test->server, listener);
     g_dbus_object_manager_server_set_connection(test->server,
                                                 test->listener_conn);
@@ -145,7 +206,7 @@ test_dbus_console_registered(GObject *source_object,
     g_assert_no_error(err);
 
     test->listener_conn = g_thread_join(test->thread);
-    test_dbus_console_setup_listener(test);
+    test_dbus_console_setup_listener(test, test->with_map);
 }
 
 static gpointer
@@ -155,7 +216,7 @@ test_dbus_p2p_server_setup_thread(gpointer data)
 }
 
 static void
-test_dbus_display_console(void)
+test_dbus_display_console(const void* data)
 {
     g_autoptr(GError) err = NULL;
     g_autoptr(GDBusConnection) conn = NULL;
@@ -163,7 +224,7 @@ test_dbus_display_console(void)
     g_autoptr(GMainLoop) loop = NULL;
     QTestState *qts = NULL;
     int pair[2];
-    TestDBusConsoleRegister test = { 0, };
+    TestDBusConsoleRegister test = { 0, .with_map = GPOINTER_TO_INT(data) };
 #ifdef WIN32
     WSAPROTOCOL_INFOW info;
     g_autoptr(GVariant) listener = NULL;
@@ -299,7 +360,8 @@ main(int argc, char **argv)
     g_test_init(&argc, &argv, NULL);
 
     qtest_add_func("/dbus-display/vm", test_dbus_display_vm);
-    qtest_add_func("/dbus-display/console", test_dbus_display_console);
+    qtest_add_data_func("/dbus-display/console", GINT_TO_POINTER(false), test_dbus_display_console);
+    qtest_add_data_func("/dbus-display/console/map", GINT_TO_POINTER(true), test_dbus_display_console);
     qtest_add_func("/dbus-display/keyboard", test_dbus_display_keyboard);
 
     return g_test_run();