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/*
* Copyright © 2012 Intel Corporation
* Copyright © 2013 Collabora, Ltd.
* Copyright © 2017 Canonical Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <unistd.h>
#include <gmock/gmock.h>
#include "helpers.h"
#include "in_process_server.h"
/* tests, that attempt to crash the compositor on purpose */
static struct wl_buffer *
create_bad_shm_buffer(wlcs::Client& client, int width, int height)
{
struct wl_shm *shm = client.shm();
int stride = width * 4;
int size = stride * height;
struct wl_shm_pool *pool;
struct wl_buffer *buffer;
int fd;
fd = wlcs::helpers::create_anonymous_file(size);
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;
}
using BadBufferTest = wlcs::InProcessServer;
TEST_F(BadBufferTest, test_truncated_shm_file)
{
using namespace testing;
wlcs::Client client{the_server()};
bool buffer_consumed{false};
auto surface = client.create_visible_surface(200, 200);
wl_buffer* 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);
surface.add_frame_callback([&buffer_consumed](int) { buffer_consumed = true; });
wl_surface_commit(surface);
try
{
client.dispatch_until([&buffer_consumed]() { return buffer_consumed; });
}
catch (wlcs::ProtocolError const& err)
{
wl_buffer_destroy(bad_buffer);
EXPECT_THAT(err.error_code(), Eq(WL_SHM_ERROR_INVALID_FD));
EXPECT_THAT(err.interface(), Eq(&wl_buffer_interface));
return;
}
FAIL() << "Expected protocol error not raised";
}
TEST_F(BadBufferTest, client_lies_about_buffer_size)
{
using namespace testing;
wlcs::Client client{the_server()};
auto surface = client.create_visible_surface(200, 200);
auto const width = 200, height = 200;
auto const incorrect_stride = width;
auto fd = wlcs::helpers::create_anonymous_file(height * incorrect_stride);
auto shm_pool = wl_shm_create_pool(client.shm(), fd, height * incorrect_stride);
auto bad_buffer = wl_shm_pool_create_buffer(
shm_pool,
0,
width, height,
incorrect_stride, // Stride is in bytes, not pixels, so this is ¼ the correct value.
WL_SHM_FORMAT_ARGB8888);
try
{
/* Buffer creation should fail, so all we need is for the create_buffer
* call to be processed
*/
client.roundtrip();
}
catch (wlcs::ProtocolError const& err)
{
wl_buffer_destroy(bad_buffer);
EXPECT_THAT(err.error_code(), Eq(WL_SHM_ERROR_INVALID_STRIDE));
EXPECT_THAT(err.interface(), Eq(&wl_shm_pool_interface));
return;
}
FAIL() << "Expected protocol error not raised";
}
// This should be identical to the first tests case of the previous test. It tests if a 2nd instance of the server can
// successfully handle a bad buffer. There have been issues with the server installing a SIGBUS handler (via
// wl_shm_buffer_begin_access()) that only works for the first server instance.
using SecondBadBufferTest = wlcs::InProcessServer;
TEST_F(SecondBadBufferTest, DISABLED_test_truncated_shm_file)
{
using namespace testing;
wlcs::Client client{the_server()};
bool buffer_consumed{false};
auto surface = client.create_visible_surface(200, 200);
wl_buffer* 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);
surface.add_frame_callback([&buffer_consumed](int) { buffer_consumed = true; });
wl_surface_commit(surface);
try
{
client.dispatch_until([&buffer_consumed]() { return buffer_consumed; });
}
catch (wlcs::ProtocolError const& err)
{
wl_buffer_destroy(bad_buffer);
EXPECT_THAT(err.error_code(), Eq(WL_SHM_ERROR_INVALID_FD));
EXPECT_THAT(err.interface(), Eq(&wl_buffer_interface));
return;
}
FAIL() << "Expected protocol error not raised";
}
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