kwin/autotests/integration/xwaylandserver_crash_test.cpp

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/*
SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "kwin_wayland_test.h"
#include "composite.h"
#include "main.h"
#include "output.h"
#include "platform.h"
#include "scene.h"
#include "screens.h"
#include "unmanaged.h"
#include "wayland_server.h"
#include "workspace.h"
#include "x11window.h"
#include "xwayland/xwayland.h"
#include "xwayland/xwaylandlauncher.h"
#include <xcb/xcb_icccm.h>
namespace KWin
{
struct XcbConnectionDeleter
{
static inline void cleanup(xcb_connection_t *pointer)
{
xcb_disconnect(pointer);
}
};
static const QString s_socketName = QStringLiteral("wayland_test_kwin_xwayland_server_crash-0");
class XwaylandServerCrashTest : public QObject
{
Q_OBJECT
private Q_SLOTS:
void initTestCase();
void testCrash();
};
void XwaylandServerCrashTest::initTestCase()
{
qRegisterMetaType<Unmanaged *>();
qRegisterMetaType<X11Window *>();
QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
QVERIFY(applicationStartedSpy.isValid());
kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
QVERIFY(waylandServer()->init(s_socketName));
QMetaObject::invokeMethod(kwinApp()->platform(), "setVirtualOutputs", Qt::DirectConnection, Q_ARG(int, 2));
KSharedConfig::Ptr config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
KConfigGroup xwaylandGroup = config->group("Xwayland");
xwaylandGroup.writeEntry(QStringLiteral("XwaylandCrashPolicy"), QStringLiteral("Stop"));
xwaylandGroup.sync();
kwinApp()->setConfig(config);
kwinApp()->start();
QVERIFY(applicationStartedSpy.wait());
const auto outputs = kwinApp()->platform()->enabledOutputs();
QCOMPARE(outputs.count(), 2);
QCOMPARE(outputs[0]->geometry(), QRect(0, 0, 1280, 1024));
QCOMPARE(outputs[1]->geometry(), QRect(1280, 0, 1280, 1024));
Test::initWaylandWorkspace();
}
void XwaylandServerCrashTest::testCrash()
{
// This test verifies that all connected X11 clients get destroyed when Xwayland crashes.
// Create a normal window.
QScopedPointer<xcb_connection_t, XcbConnectionDeleter> c(xcb_connect(nullptr, nullptr));
QVERIFY(!xcb_connection_has_error(c.data()));
const QRect windowGeometry(0, 0, 100, 200);
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xcb_window_t windowId1 = xcb_generate_id(c.data());
xcb_create_window(c.data(), XCB_COPY_FROM_PARENT, windowId1, rootWindow(),
windowGeometry.x(),
windowGeometry.y(),
windowGeometry.width(),
windowGeometry.height(),
0, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_COPY_FROM_PARENT, 0, nullptr);
xcb_size_hints_t hints;
memset(&hints, 0, sizeof(hints));
xcb_icccm_size_hints_set_position(&hints, 1, windowGeometry.x(), windowGeometry.y());
xcb_icccm_size_hints_set_size(&hints, 1, windowGeometry.width(), windowGeometry.height());
xcb_icccm_size_hints_set_min_size(&hints, windowGeometry.width(), windowGeometry.height());
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xcb_icccm_set_wm_normal_hints(c.data(), windowId1, &hints);
xcb_map_window(c.data(), windowId1);
xcb_flush(c.data());
QSignalSpy windowCreatedSpy(workspace(), &Workspace::windowAdded);
QVERIFY(windowCreatedSpy.isValid());
QVERIFY(windowCreatedSpy.wait());
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QPointer<X11Window> window = windowCreatedSpy.last().first().value<X11Window *>();
QVERIFY(window);
QVERIFY(window->isDecorated());
// Create an override-redirect window.
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xcb_window_t windowId2 = xcb_generate_id(c.data());
const uint32_t values[] = {true};
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xcb_create_window(c.data(), XCB_COPY_FROM_PARENT, windowId2, rootWindow(),
windowGeometry.x(), windowGeometry.y(),
windowGeometry.width(), windowGeometry.height(), 0,
XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_COPY_FROM_PARENT,
XCB_CW_OVERRIDE_REDIRECT, values);
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xcb_map_window(c.data(), windowId2);
xcb_flush(c.data());
QSignalSpy unmanagedAddedSpy(workspace(), &Workspace::unmanagedAdded);
QVERIFY(unmanagedAddedSpy.isValid());
QVERIFY(unmanagedAddedSpy.wait());
QPointer<Unmanaged> unmanaged = unmanagedAddedSpy.last().first().value<Unmanaged *>();
QVERIFY(unmanaged);
// Let's pretend that the Xwayland process has crashed.
QSignalSpy x11ConnectionChangedSpy(kwinApp(), &Application::x11ConnectionChanged);
QVERIFY(x11ConnectionChangedSpy.isValid());
Xwl::Xwayland *xwayland = static_cast<Xwl::Xwayland *>(XwaylandInterface::self());
xwayland->xwaylandLauncher()->process()->terminate();
QVERIFY(x11ConnectionChangedSpy.wait());
// When Xwayland crashes, the compositor should tear down the XCB connection and destroy
// all connected X11 clients.
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QTRY_VERIFY(!window);
QTRY_VERIFY(!unmanaged);
QCOMPARE(kwinApp()->x11Connection(), nullptr);
QCOMPARE(kwinApp()->x11DefaultScreen(), nullptr);
QCOMPARE(kwinApp()->x11RootWindow(), XCB_WINDOW_NONE);
QCOMPARE(kwinApp()->x11ScreenNumber(), -1);
// Render a frame to ensure that the compositor doesn't crash.
Compositor::self()->scene()->addRepaintFull();
QSignalSpy frameRenderedSpy(Compositor::self()->scene(), &Scene::frameRendered);
QVERIFY(frameRenderedSpy.wait());
}
} // namespace KWin
WAYLANDTEST_MAIN(KWin::XwaylandServerCrashTest)
#include "xwaylandserver_crash_test.moc"