tests: add a test causing SIGBUS to the compositor

This tests the wl_shm buffer access wrappers, that are supposed to catch
the invalid accesses to a memory-mapped file beyond EOF.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8e08375..c018db4 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -11,6 +11,7 @@ module_tests =                                \
 weston_test = weston-test.la
 
 weston_tests =                         \
+       bad_buffer.weston               \
        keyboard.weston                 \
        event.weston                    \
        button.weston                   \
@@ -97,6 +98,9 @@ weston_test_client_libs =             \
        ../shared/libshared.la          \
        libshared-test.la
 
+bad_buffer_weston_SOURCES = bad-buffer-test.c $(weston_test_client_src)
+bad_buffer_weston_LDADD = $(weston_test_client_libs)
+
 keyboard_weston_SOURCES = keyboard-test.c $(weston_test_client_src)
 keyboard_weston_LDADD = $(weston_test_client_libs)
 

diff --git a/tests/bad-buffer-test.c b/tests/bad-buffer-test.c
new file mode 100644 (file)
index 0000000..4f5f810
--- /dev/null
+++ b/tests/bad-buffer-test.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ * Copyright © 2013 Collabora, Ltd.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "../shared/os-compatibility.h"
+#include "weston-test-client-helper.h"
+
+/* tests, that attempt to crash the compositor on purpose */
+
+static struct wl_buffer *
+create_bad_shm_buffer(struct client *client, int width, int height)
+{
+       struct wl_shm *shm = client->wl_shm;
+       int stride = width * 4;
+       int size = stride * height;
+       struct wl_shm_pool *pool;
+       struct wl_buffer *buffer;
+       int fd;
+
+       fd = os_create_anonymous_file(size);
+       assert(fd >= 0);
+
+       pool = wl_shm_create_pool(shm, fd, size);
+       buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride,
+                                          WL_SHM_FORMAT_ARGB8888);
+       wl_shm_pool_destroy(pool);
+
+       /* Truncate the file to a small size, so that the compositor
+        * will access it out-of-bounds, and hit SIGBUS.
+        */
+       assert(ftruncate(fd, 12) == 0);
+       close(fd);
+
+       return buffer;
+}
+
+FAIL_TEST(test_truncated_shm_file)
+{
+       struct client *client;
+       struct wl_buffer *bad_buffer;
+       struct wl_surface *surface;
+       int frame;
+
+       client = client_create(46, 76, 111, 134);
+       assert(client);
+       surface = client->surface->wl_surface;
+
+       bad_buffer = create_bad_shm_buffer(client, 200, 200);
+
+       wl_surface_attach(surface, bad_buffer, 0, 0);
+       wl_surface_damage(surface, 0, 0, 200, 200);
+       frame_callback_set(surface, &frame);
+       wl_surface_commit(surface);
+       frame_callback_wait(client, &frame);
+}