dont_crash_empty_deco.cpp

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/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2016 Martin Gräßlin <mgraesslin@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "kwin_wayland_test.h"
 
#include "core/output.h"
#include "pointer_input.h"
#include "wayland_server.h"
#include "workspace.h"
#include "x11window.h"
 
#include <KDecoration2/Decoration>
 
#include <linux/input.h>
 
namespace KWin
{
 
static const QString s_socketName = QStringLiteral("wayland_test_kwin_dont_crash_empty_decoration-0");
 
class DontCrashEmptyDecorationTest : public QObject
{
    Q_OBJECT
private Q_SLOTS:
    void initTestCase();
    void init();
    void testBug361551();
};
 
void DontCrashEmptyDecorationTest::initTestCase()
{
    if (!Test::renderNodeAvailable()) {
        QSKIP("no render node available");
        return;
    }
    qRegisterMetaType<KWin::Window *>();
    QSignalSpy applicationStartedSpy(kwinApp(), &Application::started);
    QVERIFY(waylandServer()->init(s_socketName));
    Test::setOutputConfig({
        QRect(0, 0, 1280, 1024),
        QRect(1280, 0, 1280, 1024),
    });
 
    // this test needs to enforce OpenGL compositing to get into the crashy condition
    qputenv("KWIN_COMPOSE", QByteArrayLiteral("O2"));
    kwinApp()->start();
    QVERIFY(applicationStartedSpy.wait());
    const auto outputs = workspace()->outputs();
    QCOMPARE(outputs.count(), 2);
    QCOMPARE(outputs[0]->geometry(), QRect(0, 0, 1280, 1024));
    QCOMPARE(outputs[1]->geometry(), QRect(1280, 0, 1280, 1024));
    setenv("QT_QPA_PLATFORM", "wayland", true);
}
 
void DontCrashEmptyDecorationTest::init()
{
    workspace()->setActiveOutput(QPoint(640, 512));
    input()->pointer()->warp(QPoint(640, 512));
}
 
void DontCrashEmptyDecorationTest::testBug361551()
{
    // this test verifies that resizing an X11 window to an invalid size does not result in crash on unmap
    // when the DecorationRenderer gets copied to the Deleted
    // there a repaint is scheduled and the resulting texture is invalid if the window size is invalid
 
    // create an xcb window
    Test::XcbConnectionPtr connection = Test::createX11Connection();
    auto c = connection.get();
 
    QVERIFY(c);
    QVERIFY(!xcb_connection_has_error(c));
 
    xcb_window_t windowId = xcb_generate_id(c);
    xcb_create_window(c, XCB_COPY_FROM_PARENT, windowId, rootWindow(), 0, 0, 10, 10, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_COPY_FROM_PARENT, 0, nullptr);
    xcb_map_window(c, windowId);
    xcb_flush(c);
 
    // we should get a window for it
    QSignalSpy windowCreatedSpy(workspace(), &Workspace::windowAdded);
    QVERIFY(windowCreatedSpy.wait());
    X11Window *window = windowCreatedSpy.first().first().value<X11Window *>();
    QVERIFY(window);
    QCOMPARE(window->window(), windowId);
    QVERIFY(window->isDecorated());
 
    // let's set a stupid geometry
    window->moveResize({0, 0, 0, 0});
    QCOMPARE(window->frameGeometry(), QRect(0, 0, 0, 0));
 
    // and destroy the window again
    xcb_unmap_window(c, windowId);
    xcb_destroy_window(c, windowId);
    xcb_flush(c);
 
    QSignalSpy windowClosedSpy(window, &X11Window::closed);
    QVERIFY(windowClosedSpy.wait());
}
 
}
 
WAYLANDTEST_MAIN(KWin::DontCrashEmptyDecorationTest)
#include "dont_crash_empty_deco.moc"