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test: add unit tests for valid DConfig configuration
- Add comprehensive test suite for TreelandUserConfig with valid DConfig - Test immediate destroy, initialization completion, and property changes - Add stress tests for high-frequency creation/destruction cycles - Verify safety of signal handling using QPointer mechanism - Tests confirm crash fix prevents SIGSEGV in production scenarios
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‎tests/CMakeLists.txt‎

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@@ -7,3 +7,4 @@ add_subdirectory(test_protocol_shortcut)
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add_subdirectory(test_protocol_virtual-output)
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add_subdirectory(test_protocol_wallpaper-color)
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add_subdirectory(test_protocol_window-management)
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add_subdirectory(test_treeland_userconfig)

‎tests/test_treeland_userconfig/CMakeLists.txt‎

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set(CMAKE_INCLUDE_CURRENT_DIR ON)
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set(CMAKE_AUTOMOC ON)
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# Test with VALID DConfig - reproduces real machine crash (SIGSEGV)
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add_executable(test_dconfig_valid_config test_dconfig_valid_config.cpp)
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target_link_libraries(test_dconfig_valid_config
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Qt6::Core
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Qt6::Test
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libtreeland
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)
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target_include_directories(test_dconfig_valid_config PRIVATE
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${CMAKE_BINARY_DIR}/src
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)
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add_test(NAME test_dconfig_valid_config COMMAND test_dconfig_valid_config)

‎tests/test_treeland_userconfig/test_dconfig_valid_config.cpp‎

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// Copyright (C) 2026 UnionTech Software Technology Co., Ltd.
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// SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
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// Test: Reproduce SIGSEGV crash using VALID DConfig
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// The config schema is at: /usr/share/dsg/configs/org.deepin.dde.treeland/org.deepin.dde.treeland.user.json
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//
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// The crash mechanism:
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// 1. initializeInConfigThread connects to DConfig::valueChanged signal
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// QObject::connect(config, &DConfig::valueChanged, this, [this](key) { updateValue(key); })
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// 2. updateValue calls: QMetaObject::invokeMethod(this, [this]() { updateProperty(...) })
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// 3. Data object destroyed while lambda is queued
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// 4. Lambda tries to access destroyed 'this' -> SIGSEGV
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#include "treelanduserconfig.hpp"
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#include <QObject>
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#include <QTest>
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#include <QThread>
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#include <QEventLoop>
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#include <QCoreApplication>
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#include <QSignalSpy>
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#include <chrono>
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#include <atomic>
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class ValidConfigCrashTest : public QObject
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{
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Q_OBJECT
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private:
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// Static flag to track if DConfig is available
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static bool s_dConfigAvailable;
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static bool s_initialized;
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private Q_SLOTS:
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void initTestCase()
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{
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qDebug() << "=== ValidConfigCrashTest ===";
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qDebug() << "Using VALID DConfig from /usr/share/dsg/configs/";
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qDebug() << "Config name: org.deepin.dde.treeland.user";
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// One-time check for DConfig availability
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if (!s_initialized) {
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TreelandUserConfig *testConfig = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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if (testConfig) {
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QTRY_VERIFY_WITH_TIMEOUT(testConfig->isInitializeSucceed(), 2000);
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s_dConfigAvailable = testConfig->isInitializeSucceed();
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// Let initialization complete before deletion
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for (int i = 0; i < 100; ++i) {
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QCoreApplication::processEvents();
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}
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delete testConfig;
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}
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s_initialized = true;
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}
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if (!s_dConfigAvailable) {
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qDebug() << "DConfig schema not available - all tests will skip";
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}
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}
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// Test 1: Simple creation and immediate deletion
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// If DConfig is valid, this should NOT crash
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// If it crashes, it means the signal connection lambda is unsafe
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void test_immediate_destroy_valid_dconfig()
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{
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if (!s_dConfigAvailable) {
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QSKIP("DConfig schema not available on this system");
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}
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qDebug() << "\n=== Test 1: Immediate destroy with valid DConfig ===";
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// Check if DConfig schema is available
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TreelandUserConfig *testConfig = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(testConfig != nullptr, "createByName returned nullptr");
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// Wait for initialization to complete
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QTRY_VERIFY_WITH_TIMEOUT(testConfig->isInitializeSucceed(), 2000);
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if (!testConfig->isInitializeSucceed()) {
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delete testConfig;
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QSKIP("DConfig schema not available on this system; skipping test");
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}
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auto dconfig = testConfig->config();
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QVERIFY2(dconfig && dconfig->isValid(), "DConfig is not valid");
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// Process remaining events before deletion
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for (int i = 0; i < 100; ++i) {
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QCoreApplication::processEvents();
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}
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delete testConfig;
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// Now run the actual test with assertions
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for (int cycle = 0; cycle < 50; ++cycle) {
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// Use createByName with correct parameters like production code
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TreelandUserConfig *config = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(config != nullptr, qPrintable("createByName returned nullptr in cycle " + QString::number(cycle)));
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// Delete immediately
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delete config;
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// Process events
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QCoreApplication::processEvents();
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if (cycle % 10 == 0) {
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qDebug() << " Cycle" << cycle << "- No crash yet";
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}
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}
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}
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// Test 2: Destroy after signal connection is established
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// The crash is most likely here because:
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// 1. DConfig finishes initialization
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// 2. initializeInConfigThread sets up valueChanged connection
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// 3. Main thread then deletes the config
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// 4. If we trigger property change, the lambda captures destroyed 'this'
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void test_destroy_after_initialization()
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{
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if (!s_dConfigAvailable) {
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QSKIP("DConfig schema not available on this system");
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}
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qDebug() << "\n=== Test 2: Destroy after initialization ===";
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for (int cycle = 0; cycle < 30; ++cycle) {
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TreelandUserConfig *config = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(config != nullptr, qPrintable("createByName returned nullptr in cycle " + QString::number(cycle)));
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// Wait for initialization to complete with timeout
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// This gives time for DConfig to init and signal connection to be set up
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QTRY_VERIFY_WITH_TIMEOUT(config->isInitializeSucceed(), 2000);
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QVERIFY(config->isInitializeSucceed());
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auto dconfig = config->config();
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QVERIFY2(dconfig != nullptr, "config() returned nullptr");
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QVERIFY2(dconfig->isValid(), qPrintable("DConfig is not valid in cycle " + QString::number(cycle)));
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qDebug() << " Cycle" << cycle << "- Config initialized and valid";
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// Process more events to allow initialization thread to complete
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// This is critical to avoid race conditions
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for (int i = 0; i < 200; ++i) {
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QCoreApplication::processEvents();
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QThread::usleep(10);
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}
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// Now delete - the valueChanged connection should be fully set up
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// If config emits signal before deletion finishes, crash happens
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delete config;
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// Process events - this is critical
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// If there are queued valueChanged signals, they execute now
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for (int i = 0; i < 50; ++i) {
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QCoreApplication::processEvents();
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QThread::msleep(2);
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}
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}
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}
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// Test 3: Trigger property change then destroy
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// This more directly triggers the crash
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void test_property_change_then_destroy()
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{
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if (!s_dConfigAvailable) {
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QSKIP("DConfig schema not available on this system");
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}
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qDebug() << "\n=== Test 3: Property change then destroy ===";
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for (int cycle = 0; cycle < 20; ++cycle) {
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TreelandUserConfig *config = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(config != nullptr, qPrintable("createByName returned nullptr in cycle " + QString::number(cycle)));
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// Wait for initialization with timeout
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QTRY_VERIFY_WITH_TIMEOUT(config->isInitializeSucceed(), 2000);
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QVERIFY(config->isInitializeSucceed());
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auto dconfig = config->config();
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QVERIFY2(dconfig != nullptr, "config() returned nullptr");
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QVERIFY2(dconfig->isValid(), qPrintable("DConfig is not valid in cycle " + QString::number(cycle)));
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qDebug() << " Cycle" << cycle << "- DConfig is VALID";
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// Change a property to trigger valueChanged signal
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// This will cause updateValue to be called in config thread
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dconfig->setValue(QStringLiteral("themeName"),
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QVariant::fromValue(QString("test_theme_" + QString::number(cycle))));
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// Immediately delete while valueChanged signal might be in flight
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delete config;
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config = nullptr;
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// Process events - the queued updateProperty lambdas execute
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// If Data was destroyed, this triggers SIGSEGV
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for (int i = 0; i < 50; ++i) {
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QCoreApplication::processEvents();
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QThread::msleep(2);
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}
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}
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}
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// Test 4: Rapid property changes then destroy
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// More aggressive test to trigger race condition
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void test_rapid_changes_then_destroy()
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{
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if (!s_dConfigAvailable) {
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QSKIP("DConfig schema not available on this system");
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}
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qDebug() << "\n=== Test 4: Rapid property changes then destroy ===";
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for (int cycle = 0; cycle < 15; ++cycle) {
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TreelandUserConfig *config = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(config != nullptr, qPrintable("createByName returned nullptr in cycle " + QString::number(cycle)));
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// Wait for initialization with timeout
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QTRY_VERIFY_WITH_TIMEOUT(config->isInitializeSucceed(), 2000);
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QVERIFY(config->isInitializeSucceed());
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auto dconfig = config->config();
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QVERIFY2(dconfig != nullptr, "config() returned nullptr");
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QVERIFY2(dconfig->isValid(), qPrintable("DConfig is not valid in cycle " + QString::number(cycle)));
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// Rapidly change multiple properties
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for (int j = 0; j < 10; ++j) {
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dconfig->setValue(QStringLiteral("themeName"),
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QVariant::fromValue(QString("theme_" + QString::number(j))));
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dconfig->setValue(QStringLiteral("activeColor"),
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QVariant::fromValue(QString("color_" + QString::number(j))));
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QThread::msleep(1);
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}
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// Delete while many updateValue calls are queued
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delete config;
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config = nullptr;
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// Process events to execute queued lambdas
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for (int i = 0; i < 100; ++i) {
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QCoreApplication::processEvents();
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QThread::msleep(1);
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}
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}
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}
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// Test 5: Multiple sequential operations - simulate multiple configs being created and destroyed
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void test_concurrent_configs()
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{
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if (!s_dConfigAvailable) {
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QSKIP("DConfig schema not available on this system");
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}
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qDebug() << "\n=== Test 5: Multiple sequential config operations ===";
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// Run 3 sequential operations (sequential instead of concurrent)
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for (int index = 1; index <= 3; ++index) {
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for (int cycle = 0; cycle < 5; ++cycle) {
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TreelandUserConfig *config = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(config != nullptr, qPrintable("createByName returned nullptr at index " + QString::number(index) + " cycle " + QString::number(cycle)));
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// Wait for initialization with timeout
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QTRY_VERIFY_WITH_TIMEOUT(config->isInitializeSucceed(), 2000);
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QVERIFY(config->isInitializeSucceed());
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auto dconfig = config->config();
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QVERIFY2(dconfig != nullptr, "config() returned nullptr");
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QVERIFY2(dconfig->isValid(), qPrintable("DConfig is not valid at index " + QString::number(index)));
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dconfig->setValue(QStringLiteral("themeName"),
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QVariant::fromValue(QString("seq_" + QString::number(index))));
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delete config;
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for (int i = 0; i < 20; ++i) {
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QCoreApplication::processEvents();
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QThread::msleep(2);
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}
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}
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}
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// Process all remaining events
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for (int i = 0; i < 100; ++i) {
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QCoreApplication::processEvents();
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QThread::msleep(1);
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}
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}
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// Test 6: Stress test - high frequency creation/destruction
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void test_high_frequency_stress()
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{
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if (!s_dConfigAvailable) {
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QSKIP("DConfig schema not available on this system");
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}
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qDebug() << "\n=== Test 6: High frequency stress test ===";
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// Read environment variable for configurable cycle count
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// Default: 20 for CI (fast), can be set to 100+ locally for comprehensive testing
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bool ok = false;
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int cycles = qEnvironmentVariableIntValue("TREELAND_STRESS_CYCLES", &ok);
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if (!ok || cycles <= 0) {
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cycles = 20; // Default for CI environments
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}
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qDebug() << " Running stress test with" << cycles << "cycles (set TREELAND_STRESS_CYCLES to override)";
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auto start = std::chrono::high_resolution_clock::now();
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for (int cycle = 0; cycle < cycles; ++cycle) {
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TreelandUserConfig *config = TreelandUserConfig::createByName("org.deepin.dde.treeland.user",
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"org.deepin.dde.treeland",
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"/dde");
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QVERIFY2(config != nullptr, qPrintable("createByName returned nullptr in cycle " + QString::number(cycle)));
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// Minimal wait - let initialization start
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QThread::msleep(1);
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QCoreApplication::processEvents();
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// Delete immediately
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delete config;
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// Process some events
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for (int i = 0; i < 5; ++i) {
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QCoreApplication::processEvents();
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}
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}
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auto end = std::chrono::high_resolution_clock::now();
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auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
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qDebug() << " " << cycles << "cycles completed in" << duration.count() << "ms";
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}
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void cleanupTestCase()
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{
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// Final event processing to clean up any remaining objects
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for (int i = 0; i < 200; ++i) {
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QCoreApplication::processEvents();
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}
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qDebug() << "=== Test Complete ===";
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}
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};
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// Static member initialization
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bool ValidConfigCrashTest::s_dConfigAvailable = false;
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bool ValidConfigCrashTest::s_initialized = false;
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#include "test_dconfig_valid_config.moc"
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QTEST_MAIN(ValidConfigCrashTest)

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