Merge remote-tracking branch 'origin/5.8' into 5.9

Conflicts:
	src/corelib/plugin/qlibrary_unix.cpp
	src/plugins/platforms/xcb/qxcbconnection.cpp
	tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp

Change-Id: I632c400d909f8c204f55743aadc7886af2f15dfb

examples/embedded/flightinfo/flightinfo.cpp

@@ -239,9 +239,9 @@ private:
         int i = data.indexOf("a href=\"?view=detail");
         if (i > 0) {
             QString href = data.mid(i, data.indexOf('\"', i + 8) - i + 1);
-            QRegExp regex("dpap=([A-Za-z0-9]+)");
+            QRegularExpression regex("dpap=([A-Za-z0-9]+)");
-            regex.indexIn(href);
+            QRegularExpressionMatch match = regex.match(href);
-            QString airport = regex.cap(1);
+            QString airport = match.captured(1);
             QUrlQuery query(m_url);
             query.addQueryItem("dpap", airport);
             m_url.setQuery(query);

examples/opengl/legacy/grabber/mainwindow.cpp

@@ -203,10 +203,11 @@ QSize MainWindow::getSize()
     if (!ok)
         return QSize();
 
-    QRegExp regExp(tr("([0-9]+) *x *([0-9]+)"));
+    QRegularExpression regExp(tr("^([0-9]+) *x *([0-9]+)$"));
-    if (regExp.exactMatch(text)) {
+    QRegularExpressionMatch match = regExp.match(text);
-        int width = regExp.cap(1).toInt();
+    if (match.hasMatch()) {
-        int height = regExp.cap(2).toInt();
+        int width = match.captured(1).toInt();
+        int height = match.captured(2).toInt();
         if (width > 0 && width < 2048 && height > 0 && height < 2048)
             return QSize(width, height);
     }

examples/widgets/painting/shared/arthurwidgets.cpp

@@ -59,6 +59,7 @@
 #include <QFile>
 #include <QTextBrowser>
 #include <QBoxLayout>
+#include <QRegularExpression>
 
 extern QPixmap cached(const QString &img);
 
@@ -339,14 +340,12 @@ void ArthurFrame::showSource()
     foreach (QString keyword, ppKeywords)
         contents.replace(keyword, QLatin1String("<font color=navy>") + keyword + QLatin1String("</font>"));
 
-    contents.replace(QRegExp("(\\d\\d?)"), QLatin1String("<font color=navy>\\1</font>"));
+    contents.replace(QRegularExpression("(\\d\\d?)"), QLatin1String("<font color=navy>\\1</font>"));
 
-    QRegExp commentRe("(//.+)\\n");
+    QRegularExpression commentRe("(//.+?)\\n");
-    commentRe.setMinimal(true);
     contents.replace(commentRe, QLatin1String("<font color=red>\\1</font>\n"));
 
-    QRegExp stringLiteralRe("(\".+\")");
+    QRegularExpression stringLiteralRe("(\".+?\")");
-    stringLiteralRe.setMinimal(true);
     contents.replace(stringLiteralRe, QLatin1String("<font color=green>\\1</font>"));
 
     QString html = contents;

examples/widgets/tools/codecs/mainwindow.cpp

@@ -138,7 +138,8 @@ void MainWindow::aboutToShowSaveAsMenu()
 void MainWindow::findCodecs()
 {
     QMap<QString, QTextCodec *> codecMap;
-    QRegExp iso8859RegExp("ISO[- ]8859-([0-9]+).*");
+    QRegularExpression iso8859RegExp("^ISO[- ]8859-([0-9]+).*$");
+    QRegularExpressionMatch match;
 
     foreach (int mib, QTextCodec::availableMibs()) {
         QTextCodec *codec = QTextCodec::codecForMib(mib);
@@ -150,8 +151,8 @@ void MainWindow::findCodecs()
             rank = 1;
         } else if (sortKey.startsWith(QLatin1String("UTF-16"))) {
             rank = 2;
-        } else if (iso8859RegExp.exactMatch(sortKey)) {
+        } else if ((match = iso8859RegExp.match(sortKey)).hasMatch()) {
-            if (iso8859RegExp.cap(1).size() == 1)
+            if (match.captured(1).size() == 1)
                 rank = 3;
             else
                 rank = 4;

examples/widgets/tools/settingseditor/variantdelegate.cpp

@@ -56,14 +56,14 @@ VariantDelegate::VariantDelegate(QObject *parent)
     : QItemDelegate(parent)
 {
     boolExp.setPattern("true|false");
-    boolExp.setCaseSensitivity(Qt::CaseInsensitive);
+    boolExp.setPatternOptions(QRegularExpression::CaseInsensitiveOption);
 
     byteArrayExp.setPattern("[\\x00-\\xff]*");
     charExp.setPattern(".");
-    colorExp.setPattern("\\(([0-9]*),([0-9]*),([0-9]*),([0-9]*)\\)");
+    colorExp.setPattern("^\\(([0-9]*),([0-9]*),([0-9]*),([0-9]*)\\)$");
     doubleExp.setPattern("");
-    pointExp.setPattern("\\((-?[0-9]*),(-?[0-9]*)\\)");
+    pointExp.setPattern("^\\((-?[0-9]*),(-?[0-9]*)\\)$");
-    rectExp.setPattern("\\((-?[0-9]*),(-?[0-9]*),(-?[0-9]*),(-?[0-9]*)\\)");
+    rectExp.setPattern("^\\((-?[0-9]*),(-?[0-9]*),(-?[0-9]*),(-?[0-9]*)\\)$");
     signedIntegerExp.setPattern("-?[0-9]*");
     sizeExp = pointExp;
     unsignedIntegerExp.setPattern("[0-9]*");
@@ -104,7 +104,7 @@ QWidget *VariantDelegate::createEditor(QWidget *parent,
     QLineEdit *lineEdit = new QLineEdit(parent);
     lineEdit->setFrame(false);
 
-    QRegExp regExp;
+    QRegularExpression regExp;
 
     switch (originalValue.type()) {
     case QVariant::Bool:
@@ -152,8 +152,8 @@ QWidget *VariantDelegate::createEditor(QWidget *parent,
         ;
     }
 
-    if (!regExp.isEmpty()) {
+    if (regExp.isValid()) {
-        QValidator *validator = new QRegExpValidator(regExp, lineEdit);
+        QValidator *validator = new QRegularExpressionValidator(regExp, lineEdit);
         lineEdit->setValidator(validator);
     }
 
@@ -185,17 +185,18 @@ void VariantDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
 
     QVariant originalValue = index.model()->data(index, Qt::UserRole);
     QVariant value;
+    QRegularExpressionMatch match;
 
     switch (originalValue.type()) {
     case QVariant::Char:
         value = text.at(0);
         break;
     case QVariant::Color:
-        colorExp.exactMatch(text);
+        match = colorExp.match(text);
-        value = QColor(qMin(colorExp.cap(1).toInt(), 255),
+        value = QColor(qMin(match.captured(1).toInt(), 255),
-                       qMin(colorExp.cap(2).toInt(), 255),
+                       qMin(match.captured(2).toInt(), 255),
-                       qMin(colorExp.cap(3).toInt(), 255),
+                       qMin(match.captured(3).toInt(), 255),
-                       qMin(colorExp.cap(4).toInt(), 255));
+                       qMin(match.captured(4).toInt(), 255));
         break;
     case QVariant::Date:
         {
@@ -214,17 +215,17 @@ void VariantDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
         }
         break;
     case QVariant::Point:
-        pointExp.exactMatch(text);
+        match = pointExp.match(text);
-        value = QPoint(pointExp.cap(1).toInt(), pointExp.cap(2).toInt());
+        value = QPoint(match.captured(1).toInt(), match.captured(2).toInt());
         break;
     case QVariant::Rect:
-        rectExp.exactMatch(text);
+        match = rectExp.match(text);
-        value = QRect(rectExp.cap(1).toInt(), rectExp.cap(2).toInt(),
+        value = QRect(match.captured(1).toInt(), match.captured(2).toInt(),
-                      rectExp.cap(3).toInt(), rectExp.cap(4).toInt());
+                      match.captured(3).toInt(), match.captured(4).toInt());
         break;
     case QVariant::Size:
-        sizeExp.exactMatch(text);
+        match = sizeExp.match(text);
-        value = QSize(sizeExp.cap(1).toInt(), sizeExp.cap(2).toInt());
+        value = QSize(match.captured(1).toInt(), match.captured(2).toInt());
         break;
     case QVariant::StringList:
         value = text.split(',');

examples/widgets/tools/settingseditor/variantdelegate.h

@@ -52,7 +52,7 @@
 #define VARIANTDELEGATE_H
 
 #include <QItemDelegate>
-#include <QRegExp>
+#include <QRegularExpression>
 
 class VariantDelegate : public QItemDelegate
 {
@@ -73,19 +73,19 @@ public:
     static QString displayText(const QVariant &value);
 
 private:
-    mutable QRegExp boolExp;
+    mutable QRegularExpression boolExp;
-    mutable QRegExp byteArrayExp;
+    mutable QRegularExpression byteArrayExp;
-    mutable QRegExp charExp;
+    mutable QRegularExpression charExp;
-    mutable QRegExp colorExp;
+    mutable QRegularExpression colorExp;
-    mutable QRegExp dateExp;
+    mutable QRegularExpression dateExp;
-    mutable QRegExp dateTimeExp;
+    mutable QRegularExpression dateTimeExp;
-    mutable QRegExp doubleExp;
+    mutable QRegularExpression doubleExp;
-    mutable QRegExp pointExp;
+    mutable QRegularExpression pointExp;
-    mutable QRegExp rectExp;
+    mutable QRegularExpression rectExp;
-    mutable QRegExp signedIntegerExp;
+    mutable QRegularExpression signedIntegerExp;
-    mutable QRegExp sizeExp;
+    mutable QRegularExpression sizeExp;
-    mutable QRegExp timeExp;
+    mutable QRegularExpression timeExp;
-    mutable QRegExp unsignedIntegerExp;
+    mutable QRegularExpression unsignedIntegerExp;
 };
 
 #endif

examples/widgets/widgets/stylesheet/stylesheeteditor.cpp

@@ -57,11 +57,12 @@ StyleSheetEditor::StyleSheetEditor(QWidget *parent)
 {
     ui.setupUi(this);
 
-    QRegExp regExp(".(.*)\\+?Style");
+    QRegularExpression regExp("^.(.*)\\+?Style$");
     QString defaultStyle = QApplication::style()->metaObject()->className();
+    QRegularExpressionMatch match = regExp.match(defaultStyle);
 
-    if (regExp.exactMatch(defaultStyle))
+    if (match.hasMatch())
-        defaultStyle = regExp.cap(1);
+        defaultStyle = match.captured(1);
 
     ui.styleCombo->addItems(QStyleFactory::keys());
     ui.styleCombo->setCurrentIndex(ui.styleCombo->findText(defaultStyle, Qt::MatchContains));

qmake/doc/src/qmake-manual.qdoc

@@ -1230,10 +1230,6 @@
     This variable is also used to specify which additional files will be
     deployed to embedded devices.
 
-    For Windows CE, the default deployment target path is
-    \c{%CSIDL_PROGRAM_FILES%\target}, which usually gets expanded to
-    \c{\Program Files\target}.
-
     \target LEXIMPLS
     \section1 LEXIMPLS
 
@@ -2354,16 +2350,6 @@
     qmake or \l{#QMAKESPEC}{qmake.conf} and rarely
     needs to be modified.
 
-    \target SIGNATURE_FILE
-    \section1 SIGNATURE_FILE
-
-    \note This variable is only used on Windows CE.
-
-    Specifies which signature file should be used to sign the project target.
-
-    \note This variable will overwrite the setting you have specified in configure,
-    with the \c -signature option.
-
     \target SOURCES
     \section1 SOURCES
 
@@ -4483,8 +4469,8 @@
     include the precompiled header file in \c HEADERS, as
     qmake will do this if the configuration supports precompiled headers.
 
-    The MSVC and g++ specs targeting Windows (and Windows CE) enable
+    The MSVC and g++ specs targeting Windows enable \c precompile_header
-    \c precompile_header by default.
+    by default.
 
     Using this option, you may trigger
     conditional blocks in your project file to add settings when using

src/android/jar/src/org/qtproject/qt5/android/QtNative.java

@@ -243,13 +243,24 @@ public class QtNative
         }
     }
 
-    private static void runPendingCppRunnablesOnUiThread()
+    private static void runPendingCppRunnablesOnAndroidThread()
     {
         synchronized (m_mainActivityMutex) {
-            if (!m_activityPaused && m_activity != null)
+            if (m_activity != null) {
-                m_activity.runOnUiThread(runPendingCppRunnablesRunnable);
+                if (!m_activityPaused)
-            else
+                    m_activity.runOnUiThread(runPendingCppRunnablesRunnable);
-                runAction(runPendingCppRunnablesRunnable);
+                else
+                    runAction(runPendingCppRunnablesRunnable);
+            } else {
+                final Looper mainLooper = Looper.getMainLooper();
+                final Thread looperThread = mainLooper.getThread();
+                if (looperThread.equals(Thread.currentThread())) {
+                    runPendingCppRunnablesRunnable.run();
+                } else {
+                    final Handler handler = new Handler(mainLooper);
+                    handler.post(runPendingCppRunnablesRunnable);
+                }
+            }
         }
     }
 

src/corelib/configure.json

@@ -211,8 +211,7 @@
         },
         "dlopen": {
             "label": "dlopen()",
-            "condition": "tests.dlopen || libs.libdl",
+            "condition": "tests.dlopen || libs.libdl"
-            "output": [ { "type": "define", "negative": true, "name": "QT_NO_DYNAMIC_LIBRARY" } ]
         },
         "libdl": {
             "label": "dlopen() in libdl",
@@ -463,6 +462,7 @@
             "label": "QLibrary",
             "purpose": "Provides a wrapper for dynamically loaded libraries.",
             "section": "File I/O",
+            "condition": "config.win32 || config.hpux || (!config.nacl && features.dlopen)",
             "output": [ "publicFeature", "feature" ]
         },
         "settings": {

src/corelib/doc/snippets/events/events.cpp

@@ -87,15 +87,15 @@ public:
 bool MyWidget::event(QEvent *event)
 {
     if (event->type() == QEvent::KeyPress) {
-    QKeyEvent *ke = static_cast<QKeyEvent *>(event);
+        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
-    if (ke->key() == Qt::Key_Tab) {
+        if (ke->key() == Qt::Key_Tab) {
-        // special tab handling here
+            // special tab handling here
-        return true;
+            return true;
-    }
+        }
     } else if (event->type() == MyCustomEventType) {
-    MyCustomEvent *myEvent = static_cast<MyCustomEvent *>(event);
+        MyCustomEvent *myEvent = static_cast<MyCustomEvent *>(event);
-    // custom event handling here
+        // custom event handling here
-    return true;
+        return true;
     }
 
     return QWidget::event(event);

src/corelib/global/qnamespace.qdoc

@@ -2105,7 +2105,7 @@
                    On \macos, tool windows correspond to the
                    \l{http://developer.apple.com/documentation/Carbon/Conceptual/HandlingWindowsControls/hitb-wind_cont_concept/chapter_2_section_2.html}{Floating}
                    class of windows. This means that the window lives on a
-                   level above normal windows; it impossible to put a normal
+                   level above normal windows making it impossible to put a normal
                    window on top of it. By default, tool windows will disappear
                    when the application is inactive.  This can be controlled by
                    the Qt::WA_MacAlwaysShowToolWindow attribute.

src/corelib/kernel/qjnihelpers.cpp

@@ -73,7 +73,7 @@ static jclass g_jNativeClass = Q_NULLPTR;
 static jmethodID g_runPendingCppRunnablesMethodID = Q_NULLPTR;
 static jmethodID g_hideSplashScreenMethodID = Q_NULLPTR;
 Q_GLOBAL_STATIC(std::deque<QtAndroidPrivate::Runnable>, g_pendingRunnables);
-Q_GLOBAL_STATIC(QMutex, g_pendingRunnablesMutex);
+static QBasicMutex g_pendingRunnablesMutex;
 
 class PermissionsResultClass : public QObject
 {
@@ -88,21 +88,24 @@ private:
 
 typedef QHash<int, QSharedPointer<PermissionsResultClass>> PendingPermissionRequestsHash;
 Q_GLOBAL_STATIC(PendingPermissionRequestsHash, g_pendingPermissionRequests);
-Q_GLOBAL_STATIC(QMutex, g_pendingPermissionRequestsMutex);
+static QBasicMutex g_pendingPermissionRequestsMutex;
-Q_GLOBAL_STATIC(QAtomicInt, g_requestPermissionsRequestCode);
+static int nextRequestCode()
+{
+    static QBasicAtomicInt counter = Q_BASIC_ATOMIC_INITIALIZER(0);
+    return counter.fetchAndAddRelaxed(1);
+}
 
 // function called from Java from Android UI thread
 static void runPendingCppRunnables(JNIEnv */*env*/, jobject /*obj*/)
 {
     for (;;) { // run all posted runnables
-        g_pendingRunnablesMutex->lock();
+        QMutexLocker locker(&g_pendingRunnablesMutex);
         if (g_pendingRunnables->empty()) {
-            g_pendingRunnablesMutex->unlock();
             break;
         }
         QtAndroidPrivate::Runnable runnable(std::move(g_pendingRunnables->front()));
         g_pendingRunnables->pop_front();
-        g_pendingRunnablesMutex->unlock();
+        locker.unlock();
         runnable(); // run it outside the sync block!
     }
 }
@@ -122,16 +125,17 @@ Q_GLOBAL_STATIC(GenericMotionEventListeners, g_genericMotionEventListeners)
 static void sendRequestPermissionsResult(JNIEnv *env, jobject /*obj*/, jint requestCode,
                                          jobjectArray permissions, jintArray grantResults)
 {
-    g_pendingPermissionRequestsMutex->lock();
+    QMutexLocker locker(&g_pendingPermissionRequestsMutex);
     auto it = g_pendingPermissionRequests->find(requestCode);
     if (it == g_pendingPermissionRequests->end()) {
-        g_pendingPermissionRequestsMutex->unlock();
         // show an error or something ?
         return;
     }
-    g_pendingPermissionRequestsMutex->unlock();
+    auto request = std::move(*it);
+    g_pendingPermissionRequests->erase(it);
+    locker.unlock();
 
-    Qt::ConnectionType connection = QThread::currentThread() == it.value()->thread() ? Qt::DirectConnection : Qt::BlockingQueuedConnection;
+    Qt::ConnectionType connection = QThread::currentThread() == request->thread() ? Qt::DirectConnection : Qt::BlockingQueuedConnection;
     QtAndroidPrivate::PermissionsHash hash;
     const int size = env->GetArrayLength(permissions);
     std::unique_ptr<jint[]> results(new jint[size]);
@@ -143,10 +147,7 @@ static void sendRequestPermissionsResult(JNIEnv *env, jobject /*obj*/, jint requ
                             QtAndroidPrivate::PermissionsResult::Denied;
         hash[permission] = value;
     }
-    QMetaObject::invokeMethod(it.value().data(), "sendResult", connection, Q_ARG(QtAndroidPrivate::PermissionsHash, hash));
+    QMetaObject::invokeMethod(request.data(), "sendResult", connection, Q_ARG(QtAndroidPrivate::PermissionsHash, hash));
-    g_pendingPermissionRequestsMutex->lock();
-    g_pendingPermissionRequests->erase(it);
-    g_pendingPermissionRequestsMutex->unlock();
 }
 
 static jboolean dispatchGenericMotionEvent(JNIEnv *, jclass, jobject event)
@@ -403,7 +404,7 @@ jint QtAndroidPrivate::initJNI(JavaVM *vm, JNIEnv *env)
         return JNI_ERR;
 
     g_runPendingCppRunnablesMethodID = env->GetStaticMethodID(jQtNative,
-                                                       "runPendingCppRunnablesOnUiThread",
+                                                       "runPendingCppRunnablesOnAndroidThread",
                                                        "()V");
     g_hideSplashScreenMethodID = env->GetStaticMethodID(jQtNative, "hideSplashScreen", "()V");
     g_jNativeClass = static_cast<jclass>(env->NewGlobalRef(jQtNative));
@@ -459,10 +460,10 @@ void QtAndroidPrivate::runOnUiThread(QRunnable *runnable, JNIEnv *env)
 
 void QtAndroidPrivate::runOnAndroidThread(const QtAndroidPrivate::Runnable &runnable, JNIEnv *env)
 {
-    g_pendingRunnablesMutex->lock();
+    QMutexLocker locker(&g_pendingRunnablesMutex);
     const bool triggerRun = g_pendingRunnables->empty();
     g_pendingRunnables->push_back(runnable);
-    g_pendingRunnablesMutex->unlock();
+    locker.unlock();
     if (triggerRun)
         env->CallStaticVoidMethod(g_jNativeClass, g_runPendingCppRunnablesMethodID);
 }
@@ -487,18 +488,16 @@ void QtAndroidPrivate::requestPermissions(JNIEnv *env, const QStringList &permis
         return;
     }
     // Check API 23+ permissions
-    const int requestCode = (*g_requestPermissionsRequestCode)++;
+    const int requestCode = nextRequestCode();
     if (!directCall) {
-        g_pendingPermissionRequestsMutex->lock();
+        QMutexLocker locker(&g_pendingPermissionRequestsMutex);
         (*g_pendingPermissionRequests)[requestCode] = QSharedPointer<PermissionsResultClass>::create(callbackFunc);
-        g_pendingPermissionRequestsMutex->unlock();
     }
 
     runOnAndroidThread([permissions, callbackFunc, requestCode, directCall] {
         if (directCall) {
-            g_pendingPermissionRequestsMutex->lock();
+            QMutexLocker locker(&g_pendingPermissionRequestsMutex);
             (*g_pendingPermissionRequests)[requestCode] = QSharedPointer<PermissionsResultClass>::create(callbackFunc);
-            g_pendingPermissionRequestsMutex->unlock();
         }
 
         QJNIEnvironmentPrivate env;
@@ -519,8 +518,10 @@ QHash<QString, QtAndroidPrivate::PermissionsResult> QtAndroidPrivate::requestPer
         *res = result;
         sem->release();
     }, true);
-    sem->tryAcquire(1, timeoutMs);
+    if (sem->tryAcquire(1, timeoutMs))
-    return *res;
+        return std::move(*res);
+    else // mustn't touch *res
+        return QHash<QString, QtAndroidPrivate::PermissionsResult>();
 }
 
 QtAndroidPrivate::PermissionsResult QtAndroidPrivate::checkPermission(const QString &permission)

src/corelib/kernel/qmetatype.cpp

@@ -834,38 +834,27 @@ void QMetaType::registerStreamOperators(int idx, SaveOperator saveOp,
 const char *QMetaType::typeName(int typeId)
 {
     const uint type = typeId;
-    // In theory it can be filled during compilation time, but for some reason template code
-    // that is able to do it causes GCC 4.6 to generate additional 3K of executable code. Probably
-    // it is not worth of it.
-    static const char *namesCache[QMetaType::HighestInternalId + 1];
-
-    const char *result;
-    if (type <= QMetaType::HighestInternalId && ((result = namesCache[type])))
-        return result;
-
 #define QT_METATYPE_TYPEID_TYPENAME_CONVERTER(MetaTypeName, TypeId, RealName) \
-        case QMetaType::MetaTypeName: result = #RealName; break;
+        case QMetaType::MetaTypeName: return #RealName; break;
 
     switch (QMetaType::Type(type)) {
     QT_FOR_EACH_STATIC_TYPE(QT_METATYPE_TYPEID_TYPENAME_CONVERTER)
+    case QMetaType::UnknownType:
+    case QMetaType::User:
+        break;
+    }
 
-    default: {
+    if (Q_UNLIKELY(type < QMetaType::User)) {
-        if (Q_UNLIKELY(type < QMetaType::User)) {
+        return nullptr; // It can happen when someone cast int to QVariant::Type, we should not crash...
-            return 0; // It can happen when someone cast int to QVariant::Type, we should not crash...
-        } else {
-            const QVector<QCustomTypeInfo> * const ct = customTypes();
-            QReadLocker locker(customTypesLock());
-            return ct && uint(ct->count()) > type - QMetaType::User && !ct->at(type - QMetaType::User).typeName.isEmpty()
-                    ? ct->at(type - QMetaType::User).typeName.constData()
-                    : 0;
-        }
-    }
     }
+
+    const QVector<QCustomTypeInfo> * const ct = customTypes();
+    QReadLocker locker(customTypesLock());
+    return ct && uint(ct->count()) > type - QMetaType::User && !ct->at(type - QMetaType::User).typeName.isEmpty()
+            ? ct->at(type - QMetaType::User).typeName.constData()
+            : nullptr;
+
 #undef QT_METATYPE_TYPEID_TYPENAME_CONVERTER
-
-    Q_ASSERT(type <= QMetaType::HighestInternalId);
-    namesCache[type] = result;
-    return result;
 }
 
 /*

src/corelib/kernel/qobject.cpp

@@ -3708,7 +3708,7 @@ void QMetaObject::activate(QObject *sender, int signalOffset, int local_signal_i
                 continue;
 
             QObject * const receiver = c->receiver;
-            const bool receiverInSameThread = currentThreadId == receiver->d_func()->threadData->threadId;
+            const bool receiverInSameThread = currentThreadId == receiver->d_func()->threadData->threadId.load();
 
             // determine if this connection should be sent immediately or
             // put into the event queue

src/corelib/plugin/qlibrary_unix.cpp

@@ -50,13 +50,9 @@
 #  include <private/qcore_mac_p.h>
 #endif
 
-#if (defined(Q_OS_VXWORKS) && !defined(VXWORKS_RTP)) || defined (Q_OS_NACL)
-#define QT_NO_DYNAMIC_LIBRARY
-#endif
-
 QT_BEGIN_NAMESPACE
 
-#if !defined(QT_HPUX_LD) && !defined(QT_NO_DYNAMIC_LIBRARY)
+#if !defined(QT_HPUX_LD)
 QT_BEGIN_INCLUDE_NAMESPACE
 #include <dlfcn.h>
 QT_END_INCLUDE_NAMESPACE
@@ -64,9 +60,7 @@ QT_END_INCLUDE_NAMESPACE
 
 static QString qdlerror()
 {
-#if defined(QT_NO_DYNAMIC_LIBRARY)
+#if !defined(QT_HPUX_LD)
-    const char *err = "This platform does not support dynamic libraries.";
-#elif !defined(QT_HPUX_LD)
     const char *err = dlerror();
 #else
     const char *err = strerror(errno);
@@ -131,7 +125,6 @@ QStringList QLibraryPrivate::prefixes_sys()
 bool QLibraryPrivate::load_sys()
 {
     QString attempt;
-#if !defined(QT_NO_DYNAMIC_LIBRARY)
     QFileSystemEntry fsEntry(fileName);
 
     QString path = fsEntry.path();
@@ -250,7 +243,6 @@ bool QLibraryPrivate::load_sys()
         }
     }
 #endif
-#endif // QT_NO_DYNAMIC_LIBRARY
     if (!pHnd) {
         errorString = QLibrary::tr("Cannot load library %1: %2").arg(fileName, qdlerror());
     }
@@ -263,29 +255,27 @@ bool QLibraryPrivate::load_sys()
 
 bool QLibraryPrivate::unload_sys()
 {
-#if !defined(QT_NO_DYNAMIC_LIBRARY)
+#if defined(QT_HPUX_LD)
-#  if defined(QT_HPUX_LD)
     if (shl_unload((shl_t)pHnd)) {
-#  else
+#else
     if (dlclose(pHnd)) {
-#  endif
+#endif
-#  if defined (Q_OS_QNX)              // Workaround until fixed in QNX; fixes crash in
+#if defined (Q_OS_QNX)                // Workaround until fixed in QNX; fixes crash in
         char *error = dlerror();      // QtDeclarative auto test "qqmlenginecleanup" for instance
         if (!qstrcmp(error, "Shared objects still referenced")) // On QNX that's only "informative"
             return true;
         errorString = QLibrary::tr("Cannot unload library %1: %2").arg(fileName,
                                                                        QLatin1String(error));
-#  else
+#else
         errorString = QLibrary::tr("Cannot unload library %1: %2").arg(fileName, qdlerror());
-#  endif
+#endif
         return false;
     }
-#endif
     errorString.clear();
     return true;
 }
 
-#if defined(Q_OS_LINUX) && !defined(QT_NO_DYNAMIC_LIBRARY)
+#if defined(Q_OS_LINUX)
 Q_CORE_EXPORT QFunctionPointer qt_linux_find_symbol_sys(const char *symbol)
 {
     return QFunctionPointer(dlsym(RTLD_DEFAULT, symbol));
@@ -305,8 +295,6 @@ QFunctionPointer QLibraryPrivate::resolve_sys(const char* symbol)
     QFunctionPointer address = 0;
     if (shl_findsym((shl_t*)&pHnd, symbol, TYPE_UNDEFINED, &address) < 0)
         address = 0;
-#elif defined (QT_NO_DYNAMIC_LIBRARY)
-    QFunctionPointer address = 0;
 #else
     QFunctionPointer address = QFunctionPointer(dlsym(pHnd, symbol));
 #endif

src/corelib/thread/qmutex_linux.cpp

@@ -107,8 +107,6 @@ QT_BEGIN_NAMESPACE
  * waiting in the past. We then set the mutex to 0x0 and perform a FUTEX_WAKE.
  */
 
-static QBasicAtomicInt futexFlagSupport = Q_BASIC_ATOMIC_INITIALIZER(-1);
-
 static inline int _q_futex(void *addr, int op, int val, const struct timespec *timeout) Q_DECL_NOTHROW
 {
     volatile int *int_addr = reinterpret_cast<volatile int *>(addr);

src/corelib/thread/qreadwritelock_p.h

@@ -74,7 +74,7 @@ public:
     int writerCount;
     int waitingReaders;
     int waitingWriters;
-    bool recursive;
+    const bool recursive;
 
     //Called with the mutex locked
     bool lockForWrite(int timeout);

src/corelib/thread/qthread.cpp

@@ -56,7 +56,7 @@ QT_BEGIN_NAMESPACE
 */
 
 QThreadData::QThreadData(int initialRefCount)
-    : _ref(initialRefCount), loopLevel(0), scopeLevel(0), thread(0), threadId(0),
+    : _ref(initialRefCount), loopLevel(0), scopeLevel(0),
       eventDispatcher(0),
       quitNow(false), canWait(true), isAdopted(false), requiresCoreApplication(true)
 {

src/corelib/thread/qthread_p.h

@@ -284,7 +284,7 @@ public:
     QStack<QEventLoop *> eventLoops;
     QPostEventList postEventList;
     QAtomicPointer<QThread> thread;
-    Qt::HANDLE threadId;
+    QAtomicPointer<void> threadId;
     QAtomicPointer<QAbstractEventDispatcher> eventDispatcher;
     QVector<void *> tls;
     FlaggedDebugSignatures flaggedSignatures;

src/corelib/thread/qthread_unix.cpp

@@ -255,7 +255,7 @@ QThreadData *QThreadData::current(bool createIfNecessary)
         }
         data->deref();
         data->isAdopted = true;
-        data->threadId = to_HANDLE(pthread_self());
+        data->threadId.store(to_HANDLE(pthread_self()));
         if (!QCoreApplicationPrivate::theMainThread)
             QCoreApplicationPrivate::theMainThread = data->thread.load();
     }
@@ -335,7 +335,7 @@ void *QThreadPrivate::start(void *arg)
             thr->d_func()->setPriority(QThread::Priority(thr->d_func()->priority & ~ThreadPriorityResetFlag));
         }
 
-        data->threadId = to_HANDLE(pthread_self());
+        data->threadId.store(to_HANDLE(pthread_self()));
         set_thread_data(data);
 
         data->ref();
@@ -352,7 +352,7 @@ void *QThreadPrivate::start(void *arg)
         // sets the name of the current thread.
         QString objectName = thr->objectName();
 
-        pthread_t thread_id = from_HANDLE<pthread_t>(data->threadId);
+        pthread_t thread_id = from_HANDLE<pthread_t>(data->threadId.load());
         if (Q_LIKELY(objectName.isEmpty()))
             setCurrentThreadName(thread_id, thr->metaObject()->className());
         else
@@ -651,7 +651,7 @@ void QThread::start(Priority priority)
 #endif
         code = pthread_create(&threadId, &attr, QThreadPrivate::start, this);
     }
-    d->data->threadId = to_HANDLE(threadId);
+    d->data->threadId.store(to_HANDLE(threadId));
 
     pthread_attr_destroy(&attr);
 
@@ -660,7 +660,7 @@ void QThread::start(Priority priority)
 
         d->running = false;
         d->finished = false;
-        d->data->threadId = 0;
+        d->data->threadId.store(nullptr);
     }
 }
 
@@ -670,10 +670,10 @@ void QThread::terminate()
     Q_D(QThread);
     QMutexLocker locker(&d->mutex);
 
-    if (!d->data->threadId)
+    if (!d->data->threadId.load())
         return;
 
-    int code = pthread_cancel(from_HANDLE<pthread_t>(d->data->threadId));
+    int code = pthread_cancel(from_HANDLE<pthread_t>(d->data->threadId.load()));
     if (code) {
         qWarning("QThread::start: Thread termination error: %s",
                  qPrintable(qt_error_string((code))));
@@ -686,7 +686,7 @@ bool QThread::wait(unsigned long time)
     Q_D(QThread);
     QMutexLocker locker(&d->mutex);
 
-    if (from_HANDLE<pthread_t>(d->data->threadId) == pthread_self()) {
+    if (from_HANDLE<pthread_t>(d->data->threadId.load()) == pthread_self()) {
         qWarning("QThread::wait: Thread tried to wait on itself");
         return false;
     }
@@ -728,7 +728,7 @@ void QThreadPrivate::setPriority(QThread::Priority threadPriority)
     int sched_policy;
     sched_param param;
 
-    if (pthread_getschedparam(from_HANDLE<pthread_t>(data->threadId), &sched_policy, &param) != 0) {
+    if (pthread_getschedparam(from_HANDLE<pthread_t>(data->threadId.load()), &sched_policy, &param) != 0) {
         // failed to get the scheduling policy, don't bother setting
         // the priority
         qWarning("QThread::setPriority: Cannot get scheduler parameters");
@@ -744,15 +744,15 @@ void QThreadPrivate::setPriority(QThread::Priority threadPriority)
     }
 
     param.sched_priority = prio;
-    int status = pthread_setschedparam(from_HANDLE<pthread_t>(data->threadId), sched_policy, &param);
+    int status = pthread_setschedparam(from_HANDLE<pthread_t>(data->threadId.load()), sched_policy, &param);
 
 # ifdef SCHED_IDLE
     // were we trying to set to idle priority and failed?
     if (status == -1 && sched_policy == SCHED_IDLE && errno == EINVAL) {
         // reset to lowest priority possible
-        pthread_getschedparam(from_HANDLE<pthread_t>(data->threadId), &sched_policy, &param);
+        pthread_getschedparam(from_HANDLE<pthread_t>(data->threadId.load()), &sched_policy, &param);
         param.sched_priority = sched_get_priority_min(sched_policy);
-        pthread_setschedparam(from_HANDLE<pthread_t>(data->threadId), sched_policy, &param);
+        pthread_setschedparam(from_HANDLE<pthread_t>(data->threadId.load()), sched_policy, &param);
     }
 # else
     Q_UNUSED(status);

src/corelib/thread/qthread_win.cpp

@@ -137,7 +137,7 @@ QThreadData *QThreadData::current(bool createIfNecessary)
         }
         threadData->deref();
         threadData->isAdopted = true;
-        threadData->threadId = reinterpret_cast<Qt::HANDLE>(quintptr(GetCurrentThreadId()));
+        threadData->threadId.store(reinterpret_cast<Qt::HANDLE>(quintptr(GetCurrentThreadId())));
 
         if (!QCoreApplicationPrivate::theMainThread) {
             QCoreApplicationPrivate::theMainThread = threadData->thread.load();
@@ -351,7 +351,7 @@ unsigned int __stdcall QT_ENSURE_STACK_ALIGNED_FOR_SSE QThreadPrivate::start(voi
 
     qt_create_tls();
     TlsSetValue(qt_current_thread_data_tls_index, data);
-    data->threadId = reinterpret_cast<Qt::HANDLE>(quintptr(GetCurrentThreadId()));
+    data->threadId.store(reinterpret_cast<Qt::HANDLE>(quintptr(GetCurrentThreadId())));
 
     QThread::setTerminationEnabled(false);
 

src/gui/doc/snippets/code/src_gui_text_qsyntaxhighlighter.cpp

@@ -60,14 +60,13 @@ void MyHighlighter::highlightBlock(const QString &text)
     QTextCharFormat myClassFormat;
     myClassFormat.setFontWeight(QFont::Bold);
     myClassFormat.setForeground(Qt::darkMagenta);
-    QString pattern = "\\bMy[A-Za-z]+\\b";
 
-    QRegExp expression(pattern);
+    QRegularExpression expression("\\bMy[A-Za-z]+\\b");
-    int index = text.indexOf(expression);
+    QRegularExpressionMatchIterator i = expression.globalMatch(text);
-    while (index >= 0) {
+    while (i.hasNext())
-        int length = expression.matchedLength();
+    {
-        setFormat(index, length, myClassFormat);
+      QRegularExpressionMatch match = i.next();
-        index = text.indexOf(expression, index + length);
+      setFormat(match.capturedStart(), match.capturedLength(), myClassFormat);
     }
 }
 //! [1]
@@ -77,8 +76,8 @@ void MyHighlighter::highlightBlock(const QString &text)
 QTextCharFormat multiLineCommentFormat;
 multiLineCommentFormat.setForeground(Qt::red);
 
-QRegExp startExpression("/\\*");
+QRegularExpression startExpression("/\\*");
-QRegExp endExpression("\\*/");
+QRegularExpression endExpression("\\*/");
 
 setCurrentBlockState(0);
 
@@ -87,14 +86,15 @@ if (previousBlockState() != 1)
     startIndex = text.indexOf(startExpression);
 
 while (startIndex >= 0) {
-   int endIndex = text.indexOf(endExpression, startIndex);
+   QRegularExpressionMatch endMatch;
+   int endIndex = text.indexOf(endExpression, startIndex, &endMatch);
    int commentLength;
    if (endIndex == -1) {
        setCurrentBlockState(1);
        commentLength = text.length() - startIndex;
    } else {
        commentLength = endIndex - startIndex
-                       + endExpression.matchedLength();
+                       + endMatch.capturedLength();
    }
    setFormat(startIndex, commentLength, multiLineCommentFormat);
    startIndex = text.indexOf(startExpression,
@@ -104,25 +104,6 @@ while (startIndex >= 0) {
 
 
 //! [3]
-void MyHighlighter::highlightBlock(const QString &text)
-{
-    QTextCharFormat myClassFormat;
-    myClassFormat.setFontWeight(QFont::Bold);
-    myClassFormat.setForeground(Qt::darkMagenta);
-    QString pattern = "\\bMy[A-Za-z]+\\b";
-
-    QRegExp expression(pattern);
-    int index = text.indexOf(expression);
-    while (index >= 0) {
-        int length = expression.matchedLength();
-        setFormat(index, length, myClassFormat);
-        index = text.indexOf(expression, index + length);
-     }
- }
-//! [3]
-
-
-//! [4]
 struct ParenthesisInfo
 {
     QChar char;
@@ -133,4 +114,4 @@ struct BlockData : public QTextBlockUserData
 {
     QVector<ParenthesisInfo> parentheses;
 };
-//! [4]
+//! [3]

src/gui/text/qcssparser_p.h

@@ -75,6 +75,10 @@ QT_END_NAMESPACE
 #if defined(Q_OS_INTEGRITY)
 #  undef Value
 #endif
+// Hurd has #define TILDE 0x00080000 from <sys/ioctl.h>
+#if defined(TILDE)
+#  undef TILDE
+#endif
 
 #define QT_CSS_DECLARE_TYPEINFO(Class, Type) \
     } /* namespace QCss */ \

src/gui/text/qsyntaxhighlighter.cpp

@@ -243,6 +243,8 @@ void QSyntaxHighlighterPrivate::reformatBlock(const QTextBlock &block)
 
     \snippet code/src_gui_text_qsyntaxhighlighter.cpp 1
 
+    \target QSyntaxHighlighter multiblock
+
     Some syntaxes can have constructs that span several text
     blocks. For example, a C++ syntax highlighter should be able to
     cope with \c{/}\c{*...*}\c{/} multiline comments. To deal with
@@ -267,12 +269,12 @@ void QSyntaxHighlighterPrivate::reformatBlock(const QTextBlock &block)
     \snippet code/src_gui_text_qsyntaxhighlighter.cpp 2
 
     In the example above, we first set the current block state to
-    0. Then, if the previous block ended within a comment, we higlight
+    0. Then, if the previous block ended within a comment, we highlight
     from the beginning of the current block (\c {startIndex =
     0}). Otherwise, we search for the given start expression. If the
     specified end expression cannot be found in the text block, we
     change the current block state by calling setCurrentBlockState(),
-    and make sure that the rest of the block is higlighted.
+    and make sure that the rest of the block is highlighted.
 
     In addition you can query the current formatting and user data
     using the format() and currentBlockUserData() functions
@@ -411,33 +413,12 @@ void QSyntaxHighlighter::rehighlightBlock(const QTextBlock &block)
     setFormat() as often as necessary to apply any font and color
     changes that you require. For example:
 
-    \snippet code/src_gui_text_qsyntaxhighlighter.cpp 3
+    \snippet code/src_gui_text_qsyntaxhighlighter.cpp 1
 
-    Some syntaxes can have constructs that span several text
+    See the \l{QSyntaxHighlighter multiblock}{Detailed Description} for
-    blocks. For example, a C++ syntax highlighter should be able to
+    examples of using setCurrentBlockState(), currentBlockState()
-    cope with \c{/}\c{*...*}\c{/} multiline comments. To deal with
+    and previousBlockState() to handle syntaxes with constructs that
-    these cases it is necessary to know the end state of the previous
+    span several text blocks
-    text block (e.g. "in comment").
-
-    Inside your highlightBlock() implementation you can query the end
-    state of the previous text block using the previousBlockState()
-    function. After parsing the block you can save the last state
-    using setCurrentBlockState().
-
-    The currentBlockState() and previousBlockState() functions return
-    an int value. If no state is set, the returned value is -1. You
-    can designate any other value to identify any given state using
-    the setCurrentBlockState() function. Once the state is set the
-    QTextBlock keeps that value until it is set set again or until the
-    corresponding paragraph of text gets deleted.
-
-    For example, if you're writing a simple C++ syntax highlighter,
-    you might designate 1 to signify "in comment". For a text block
-    that ended in the middle of a comment you'd set 1 using
-    setCurrentBlockState, and for other paragraphs you'd set 0.
-    In your parsing code if the return value of previousBlockState()
-    is 1, you would highlight the text as a C++ comment until you
-    reached the closing \c{*}\c{/}.
 
     \sa previousBlockState(), setFormat(), setCurrentBlockState()
 */
@@ -581,7 +562,7 @@ void QSyntaxHighlighter::setCurrentBlockState(int newState)
     and store their relative position and the actual QChar in a simple
     class derived from QTextBlockUserData:
 
-    \snippet code/src_gui_text_qsyntaxhighlighter.cpp 4
+    \snippet code/src_gui_text_qsyntaxhighlighter.cpp 3
 
     During cursor navigation in the associated editor, you can ask the
     current QTextBlock (retrieved using the QTextCursor::block()

src/network/bearer/qnetworksession.cpp

@@ -252,6 +252,10 @@ QT_BEGIN_NAMESPACE
 QNetworkSession::QNetworkSession(const QNetworkConfiguration &connectionConfig, QObject *parent)
     : QObject(parent), d(0)
 {
+    qRegisterMetaType<QNetworkSession::State>();
+    qRegisterMetaType<QNetworkSession::SessionError>();
+    qRegisterMetaType<QNetworkSession::UsagePolicies>();
+
     // invalid configuration
     if (!connectionConfig.identifier().isEmpty()) {
         const auto engines = qNetworkConfigurationManagerPrivate()->engines();
@@ -277,10 +281,6 @@ QNetworkSession::QNetworkSession(const QNetworkConfiguration &connectionConfig,
             }
         }
     }
-
-    qRegisterMetaType<QNetworkSession::State>();
-    qRegisterMetaType<QNetworkSession::SessionError>();
-    qRegisterMetaType<QNetworkSession::UsagePolicies>();
 }
 
 /*!

src/plugins/platforms/windows/qwindowsglcontext.h

@@ -48,6 +48,7 @@
 #include <vector>
 
 QT_BEGIN_NAMESPACE
+#ifndef QT_NO_OPENGL
 
 class QDebug;
 
@@ -227,7 +228,7 @@ private:
     GLenum (APIENTRY * m_getGraphicsResetStatus)();
     bool m_lost;
 };
-
+#endif
 QT_END_NAMESPACE
 
 #endif // QWINDOWSGLCONTEXT_H

src/plugins/platforms/xcb/qxcbconnection.cpp

@@ -605,7 +605,8 @@ QXcbConnection::QXcbConnection(QXcbNativeInterface *nativeInterface, bool canGra
 
     initializeXRender();
 #if defined(XCB_USE_XINPUT2)
-    initializeXInput2();
+    if (!qEnvironmentVariableIsSet("QT_XCB_NO_XI2"))
+        initializeXInput2();
 #endif
     initializeXShape();
     initializeXKB();

src/testlib/qtestsystem.h

@@ -58,7 +58,7 @@ namespace QTest
     {
         Q_ASSERT(QCoreApplication::instance());
 
-        QDeadlineTimer timer(ms);
+        QDeadlineTimer timer(ms, Qt::PreciseTimer);
         int remaining = ms;
         do {
             QCoreApplication::processEvents(QEventLoop::AllEvents, remaining);
@@ -74,7 +74,7 @@ namespace QTest
 #ifdef QT_GUI_LIB
     inline static bool qWaitForWindowActive(QWindow *window, int timeout = 5000)
     {
-        QDeadlineTimer timer(timeout);
+        QDeadlineTimer timer(timeout, Qt::PreciseTimer);
         int remaining = timeout;
         while (!window->isActive() && remaining > 0) {
             QCoreApplication::processEvents(QEventLoop::AllEvents, remaining);
@@ -101,7 +101,7 @@ namespace QTest
 
     inline static bool qWaitForWindowExposed(QWindow *window, int timeout = 5000)
     {
-        QDeadlineTimer timer(timeout);
+        QDeadlineTimer timer(timeout, Qt::PreciseTimer);
         int remaining = timeout;
         while (!window->isExposed() && remaining > 0) {
             QCoreApplication::processEvents(QEventLoop::AllEvents, remaining);

src/tools/uic/cpp/cppwriteinitialization.cpp

@@ -1153,6 +1153,7 @@ void WriteInitialization::writeProperties(const QString &varName,
         DomPropertyMap properties = propertyMap(lst);
         if (properties.contains(QLatin1String("control"))) {
             DomProperty *p = properties.value(QLatin1String("control"));
+            Q_ASSERT( p );
             m_output << m_indent << varName << "->setControl("
                    << writeString(toString(p->elementString()), m_dindent) << ");\n";
         }

src/widgets/dialogs/qfiledialog.cpp

@@ -656,7 +656,7 @@ void QFileDialogPrivate::retranslateStrings()
     /* WIDGETS */
     if (options->useDefaultNameFilters())
         q->setNameFilter(QFileDialogOptions::defaultNameFilterString());
-    if (nativeDialogInUse)
+    if (!usingWidgets())
         return;
 
     QList<QAction*> actions = qFileDialogUi->treeView->header()->actions();

tests/auto/corelib/kernel/qelapsedtimer/tst_qelapsedtimer.cpp

@@ -31,7 +31,7 @@
 #include <QtCore/QElapsedTimer>
 #include <QtTest/QtTest>
 
-static const int minResolution = 50; // the minimum resolution for the tests
+static const int minResolution = 100; // the minimum resolution for the tests
 
 QDebug operator<<(QDebug s, const QElapsedTimer &t)
 {
@@ -107,7 +107,7 @@ void tst_QElapsedTimer::elapsed()
     QElapsedTimer t1;
     t1.start();
 
-    QTest::qSleep(4*minResolution);
+    QTest::qSleep(2*minResolution);
     QElapsedTimer t2;
     t2.start();
 
@@ -128,8 +128,8 @@ void tst_QElapsedTimer::elapsed()
     QVERIFY(!t2.hasExpired(-1));
 
     qint64 elapsed = t1.restart();
-    QVERIFY(elapsed > 3*minResolution);
+    QVERIFY(elapsed > minResolution);
-    QVERIFY(elapsed < 5*minResolution);
+    QVERIFY(elapsed < 3*minResolution);
     qint64 diff = t2.msecsTo(t1);
     QVERIFY(diff < minResolution);
 }

tests/auto/corelib/kernel/qtimer/BLACKLIST

@@ -0,0 +1,3 @@
+[remainingTime]
+windows
+osx

tests/auto/corelib/mimetypes/qmimedatabase/tst_qmimedatabase.cpp

@@ -858,6 +858,11 @@ void tst_QMimeDatabase::fromThreads()
 }
 
 #ifndef QT_NO_PROCESS
+
+enum {
+    UpdateMimeDatabaseTimeout = 120 * 1000 // 2min
+};
+
 static bool runUpdateMimeDatabase(const QString &path) // TODO make it a QMimeDatabase method?
 {
     const QString umdCommand = QString::fromLatin1("update-mime-database");
@@ -878,7 +883,7 @@ static bool runUpdateMimeDatabase(const QString &path) // TODO make it a QMimeDa
                  qPrintable(umd), qPrintable(proc.errorString()));
         return false;
     }
-    const bool success = proc.waitForFinished();
+    const bool success = proc.waitForFinished(UpdateMimeDatabaseTimeout);
     qDebug().noquote() << "runUpdateMimeDatabase: done,"
         << success << timer.elapsed() << "ms";
     return true;

tests/auto/corelib/thread/qsemaphore/tst_qsemaphore.cpp

@@ -367,16 +367,18 @@ public:
     void run();
 };
 
+static const int Timeout = 60 * 1000; // 1min
+
 void Producer::run()
 {
     for (int i = 0; i < DataSize; ++i) {
-        freeSpace.acquire();
+        QVERIFY(freeSpace.tryAcquire(1, Timeout));
         buffer[i % BufferSize] = alphabet[i % AlphabetSize];
         usedSpace.release();
     }
     for (int i = 0; i < DataSize; ++i) {
         if ((i % ProducerChunkSize) == 0)
-            freeSpace.acquire(ProducerChunkSize);
+            QVERIFY(freeSpace.tryAcquire(ProducerChunkSize, Timeout));
         buffer[i % BufferSize] = alphabet[i % AlphabetSize];
         if ((i % ProducerChunkSize) == (ProducerChunkSize - 1))
             usedSpace.release(ProducerChunkSize);

tests/auto/corelib/thread/qthreadpool/tst_qthreadpool.cpp

@@ -958,51 +958,88 @@ void tst_QThreadPool::clear()
 void tst_QThreadPool::cancel()
 {
     QSemaphore sem(0);
+    QSemaphore startedThreads(0);
+
+    class SemaphoreReleaser
+    {
+        QSemaphore &sem;
+        int n;
+        Q_DISABLE_COPY(SemaphoreReleaser)
+    public:
+        explicit SemaphoreReleaser(QSemaphore &sem, int n)
+            : sem(sem), n(n) {}
+
+        ~SemaphoreReleaser()
+        {
+            sem.release(n);
+        }
+    };
+
     class BlockingRunnable : public QRunnable
     {
     public:
         QSemaphore & sem;
-        int & dtorCounter;
+        QSemaphore &startedThreads;
-        int & runCounter;
+        QAtomicInt &dtorCounter;
+        QAtomicInt &runCounter;
         int dummy;
-        BlockingRunnable(QSemaphore & s, int & c, int & r) : sem(s), dtorCounter(c), runCounter(r){}
+
-        ~BlockingRunnable(){dtorCounter++;}
+        explicit BlockingRunnable(QSemaphore &s, QSemaphore &started, QAtomicInt &c, QAtomicInt &r)
+            : sem(s), startedThreads(started), dtorCounter(c), runCounter(r){}
+
+        ~BlockingRunnable()
+        {
+            dtorCounter.fetchAndAddRelaxed(1);
+        }
+
         void run()
         {
-            runCounter++;
+            startedThreads.release();
+            runCounter.fetchAndAddRelaxed(1);
             sem.acquire();
             count.ref();
         }
     };
-    typedef BlockingRunnable* BlockingRunnablePtr;
+
+    enum {
+        MaxThreadCount = 3,
+        OverProvisioning = 2,
+        runs = MaxThreadCount * OverProvisioning
+    };
 
     QThreadPool threadPool;
-    threadPool.setMaxThreadCount(3);
+    threadPool.setMaxThreadCount(MaxThreadCount);
-    int runs = 2 * threadPool.maxThreadCount();
+    BlockingRunnable *runnables[runs];
-    BlockingRunnablePtr* runnables = new BlockingRunnablePtr[runs];
+
+    // ensure that the QThreadPool doesn't deadlock if any of the checks fail
+    // and cause an early return:
+    const SemaphoreReleaser semReleaser(sem, runs);
+
     count.store(0);
-    int dtorCounter = 0;
+    QAtomicInt dtorCounter = 0;
-    int runCounter = 0;
+    QAtomicInt runCounter = 0;
     for (int i = 0; i < runs; i++) {
-        runnables[i] = new BlockingRunnable(sem, dtorCounter, runCounter);
+        runnables[i] = new BlockingRunnable(sem, startedThreads, dtorCounter, runCounter);
         runnables[i]->setAutoDelete(i != 0 && i != (runs-1)); //one which will run and one which will not
         threadPool.cancel(runnables[i]); //verify NOOP for jobs not in the queue
         threadPool.start(runnables[i]);
     }
+    // wait for all worker threads to have started up:
+    QVERIFY(startedThreads.tryAcquire(MaxThreadCount, 60*1000 /* 1min */));
+
     for (int i = 0; i < runs; i++) {
         threadPool.cancel(runnables[i]);
     }
     runnables[0]->dummy = 0; //valgrind will catch this if cancel() is crazy enough to delete currently running jobs
     runnables[runs-1]->dummy = 0;
-    QCOMPARE(dtorCounter, runs-threadPool.maxThreadCount()-1);
+    QCOMPARE(dtorCounter.load(), runs - threadPool.maxThreadCount() - 1);
     sem.release(threadPool.maxThreadCount());
     threadPool.waitForDone();
-    QCOMPARE(runCounter, threadPool.maxThreadCount());
+    QCOMPARE(runCounter.load(), threadPool.maxThreadCount());
     QCOMPARE(count.load(), threadPool.maxThreadCount());
-    QCOMPARE(dtorCounter, runs-2);
+    QCOMPARE(dtorCounter.load(), runs - 2);
     delete runnables[0]; //if the pool deletes them then we'll get double-free crash
     delete runnables[runs-1];
-    delete[] runnables;
 }
 
 void tst_QThreadPool::destroyingWaitsForTasksToFinish()

tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp

@@ -155,6 +155,29 @@ private:
     QDateTime invalidDateTime() const { return QDateTime(invalidDate(), invalidTime()); }
     QDate invalidDate() const { return QDate(); }
     QTime invalidTime() const { return QTime(-1, -1, -1); }
+
+    class TimeZoneRollback
+    {
+        const QByteArray prior;
+    public:
+        // Save the previous timezone so we can restore it afterwards, otherwise
+        // later tests may break:
+        explicit TimeZoneRollback(const QByteArray &zone) : prior(qgetenv("TZ"))
+        { reset(zone); }
+        void reset(const QByteArray &zone)
+        {
+            qputenv("TZ", zone.constData());
+            tzset();
+        }
+        ~TimeZoneRollback()
+        {
+            if (prior.isNull())
+                qunsetenv("TZ");
+            else
+                qputenv("TZ", prior.constData());
+            tzset();
+        }
+    };
 };
 
 Q_DECLARE_METATYPE(Qt::TimeSpec)
@@ -1953,12 +1976,8 @@ void tst_QDateTime::operator_insert_extract()
     QFETCH(QString, deserialiseAs);
     QFETCH(QDataStream::Version, dataStreamVersion);
 
-    // Save the previous timezone so we can restore it afterwards, otherwise later tests will break
-    QByteArray previousTimeZone = qgetenv("TZ");
-
     // Start off in a certain timezone.
-    qputenv("TZ", serialiseAs.toLocal8Bit().constData());
+    TimeZoneRollback useZone(serialiseAs.toLocal8Bit());
-    tzset();
     QDateTime dateTimeAsUTC(dateTime.toUTC());
 
     QByteArray byteArray;
@@ -1983,8 +2002,7 @@ void tst_QDateTime::operator_insert_extract()
 
     // Ensure that a change in timezone between serialisation and deserialisation
     // still results in identical UTC-converted datetimes.
-    qputenv("TZ", deserialiseAs.toLocal8Bit().constData());
+    useZone.reset(deserialiseAs.toLocal8Bit());
-    tzset();
     QDateTime expectedLocalTime(dateTimeAsUTC.toLocalTime());
     {
         // Deserialise whole QDateTime at once.
@@ -2035,12 +2053,6 @@ void tst_QDateTime::operator_insert_extract()
             QCOMPARE(localDeserialized, dateTime);
         }
     }
-
-    if (previousTimeZone.isNull())
-        qunsetenv("TZ");
-    else
-        qputenv("TZ", previousTimeZone.constData());
-    tzset();
 }
 
 void tst_QDateTime::toString_strformat()