diff --git a/src/libs/extensionsystem/pluginmanager.cpp b/src/libs/extensionsystem/pluginmanager.cpp
index 01811c33c54..5937a6d639d 100644
--- a/src/libs/extensionsystem/pluginmanager.cpp
+++ b/src/libs/extensionsystem/pluginmanager.cpp
@@ -35,6 +35,7 @@
 #include <utils/qtcassert.h>
 #include <utils/qtcprocess.h>
 #include <utils/qtcsettings.h>
+#include <utils/threadutils.h>
 
 #ifdef WITH_TESTS
 #include <utils/hostosinfo.h>
@@ -851,7 +852,7 @@ bool PluginManager::finishScenario()
 // Waits until the running scenario is fully initialized
 void PluginManager::waitForScenarioFullyInitialized()
 {
-    if (QThread::currentThread() == qApp->thread()) {
+    if (isMainThread()) {
         qWarning("The waitForScenarioFullyInitialized() function can't be called from main thread.");
         return;
     }
@@ -1378,7 +1379,7 @@ void PluginManagerPrivate::shutdown()
 #ifdef WITH_TESTS
     if (PluginManager::isScenarioRunning("TestModelManagerInterface")) {
         qDebug() << "Point 2: Expect the next call to Point 3 triggers a crash";
-        QThread::currentThread()->sleep(5);
+        QThread::sleep(5);
     }
 #endif
     if (!allObjects.isEmpty()) {
diff --git a/src/libs/qmljs/qmljsmodelmanagerinterface.cpp b/src/libs/qmljs/qmljsmodelmanagerinterface.cpp
index c39c48415dc..fc31c30e1b7 100644
--- a/src/libs/qmljs/qmljsmodelmanagerinterface.cpp
+++ b/src/libs/qmljs/qmljsmodelmanagerinterface.cpp
@@ -7,7 +7,6 @@
 #include "qmljsinterpreter.h"
 #include "qmljsmodelmanagerinterface.h"
 #include "qmljsplugindumper.h"
-#include "qmljstypedescriptionreader.h"
 #include "qmljsdialect.h"
 #include "qmljsviewercontext.h"
 #include "qmljsutils.h"
@@ -989,7 +988,7 @@ void ModelManagerInterface::parseLoop(QSet<Utils::FilePath> &scannedPaths,
             ExtensionSystem::PluginManager::waitForScenarioFullyInitialized();
             if (ExtensionSystem::PluginManager::finishScenario()) {
                 qDebug() << "Point 1: Shutdown triggered";
-                QThread::currentThread()->sleep(2);
+                QThread::sleep(2);
                 qDebug() << "Point 3: If Point 2 was already reached, expect a crash now";
             }
         }
diff --git a/src/libs/utils/processreaper.cpp b/src/libs/utils/processreaper.cpp
index 8f247ba3094..2638b09b1ed 100644
--- a/src/libs/utils/processreaper.cpp
+++ b/src/libs/utils/processreaper.cpp
@@ -4,6 +4,7 @@
 #include "processreaper.h"
 #include "processutils.h"
 #include "qtcassert.h"
+#include "threadutils.h"
 
 #include <QCoreApplication>
 #include <QDebug>
@@ -224,7 +225,7 @@ ProcessReaper::ProcessReaper()
 
 ProcessReaper::~ProcessReaper()
 {
-    QTC_CHECK(QThread::currentThread() == qApp->thread());
+    QTC_CHECK(isMainThread());
     QMutexLocker locker(&s_instanceMutex);
     instance()->m_private->waitForFinished();
     m_thread.quit();
diff --git a/src/libs/utils/qtcprocess.cpp b/src/libs/utils/qtcprocess.cpp
index 7ddce617637..f0f6170f882 100644
--- a/src/libs/utils/qtcprocess.cpp
+++ b/src/libs/utils/qtcprocess.cpp
@@ -12,6 +12,7 @@
 #include "processreaper.h"
 #include "processutils.h"
 #include "terminalprocess_p.h"
+#include "threadutils.h"
 
 #include <QCoreApplication>
 #include <QDebug>
@@ -62,25 +63,25 @@ public:
         timer.start();
         auto cleanup = qScopeGuard([this, &timer] {
             const qint64 currentNsecs = timer.nsecsElapsed();
-            const bool isMainThread = QThread::currentThread() == qApp->thread();
+            const bool mainThread = isMainThread();
             const int hitThisAll = m_hitThisAll.fetch_add(1) + 1;
             const int hitAllAll = m_hitAllAll.fetch_add(1) + 1;
-            const int hitThisMain = isMainThread
+            const int hitThisMain = mainThread
                     ? m_hitThisMain.fetch_add(1) + 1
                     : m_hitThisMain.load();
-            const int hitAllMain = isMainThread
+            const int hitAllMain = mainThread
                     ? m_hitAllMain.fetch_add(1) + 1
                     : m_hitAllMain.load();
             const qint64 totalThisAll = toMs(m_totalThisAll.fetch_add(currentNsecs) + currentNsecs);
             const qint64 totalAllAll = toMs(m_totalAllAll.fetch_add(currentNsecs) + currentNsecs);
-            const qint64 totalThisMain = toMs(isMainThread
+            const qint64 totalThisMain = toMs(mainThread
                     ? m_totalThisMain.fetch_add(currentNsecs) + currentNsecs
                     : m_totalThisMain.load());
-            const qint64 totalAllMain = toMs(isMainThread
+            const qint64 totalAllMain = toMs(mainThread
                     ? m_totalAllMain.fetch_add(currentNsecs) + currentNsecs
                     : m_totalAllMain.load());
             printMeasurement(QLatin1String(m_functionName), hitThisAll, toMs(currentNsecs),
-                             totalThisAll, hitAllAll, totalAllAll, isMainThread,
+                             totalThisAll, hitAllAll, totalAllAll, mainThread,
                              hitThisMain, totalThisMain, hitAllMain, totalAllMain);
         });
         return std::invoke(std::forward<Function>(function), std::forward<Args>(args)...);
@@ -1212,7 +1213,7 @@ void QtcProcess::setRemoteProcessHooks(const DeviceProcessHooks &hooks)
 static bool askToKill(const QString &command)
 {
 #ifdef QT_GUI_LIB
-    if (QThread::currentThread() != QCoreApplication::instance()->thread())
+    if (!isMainThread())
         return true;
     const QString title = QtcProcess::tr("Process Not Responding");
     QString msg = command.isEmpty() ?
@@ -1775,13 +1776,6 @@ void QtcProcess::setWriteData(const QByteArray &writeData)
     d->m_setup.m_writeData = writeData;
 }
 
-#ifdef QT_GUI_LIB
-static bool isGuiThread()
-{
-    return QThread::currentThread() == QCoreApplication::instance()->thread();
-}
-#endif
-
 void QtcProcess::runBlocking(EventLoopMode eventLoopMode)
 {
     // Attach a dynamic property with info about blocking type
@@ -1802,7 +1796,7 @@ void QtcProcess::runBlocking(EventLoopMode eventLoopMode)
             timer.setInterval(1000);
             timer.start();
 #ifdef QT_GUI_LIB
-            if (isGuiThread())
+            if (isMainThread())
                 QApplication::setOverrideCursor(Qt::WaitCursor);
 #endif
             QEventLoop eventLoop(this);
@@ -1812,7 +1806,7 @@ void QtcProcess::runBlocking(EventLoopMode eventLoopMode)
             d->m_eventLoop = nullptr;
             timer.stop();
 #ifdef QT_GUI_LIB
-            if (isGuiThread())
+            if (isMainThread())
                 QApplication::restoreOverrideCursor();
 #endif
         }
diff --git a/src/libs/utils/singleton.cpp b/src/libs/utils/singleton.cpp
index 474b6bd0e81..cbf7aa21789 100644
--- a/src/libs/utils/singleton.cpp
+++ b/src/libs/utils/singleton.cpp
@@ -3,10 +3,9 @@
 
 #include "qtcassert.h"
 #include "singleton.h"
+#include "threadutils.h"
 
-#include <QCoreApplication>
 #include <QList>
-#include <QThread>
 
 #include <unordered_map>
 
@@ -45,7 +44,7 @@ SingletonStaticData &Singleton::staticData(std::type_index index)
 // only.
 void Singleton::deleteAll()
 {
-    QTC_ASSERT(QThread::currentThread() == qApp->thread(), return);
+    QTC_ASSERT(isMainThread(), return);
     QList<Singleton *> oldList;
     {
         QMutexLocker locker(&s_mutex);
diff --git a/src/plugins/cppeditor/stringtable.cpp b/src/plugins/cppeditor/stringtable.cpp
index 737c3dd3d0a..6f0ef89b18a 100644
--- a/src/plugins/cppeditor/stringtable.cpp
+++ b/src/plugins/cppeditor/stringtable.cpp
@@ -119,7 +119,7 @@ void StringTablePrivate::GC(QFutureInterface<void> &futureInterface)
 #ifdef WITH_TESTS
     if (ExtensionSystem::PluginManager::isScenarioRunning("TestStringTable")) {
         if (ExtensionSystem::PluginManager::finishScenario())
-            QThread::currentThread()->sleep(5);
+            QThread::sleep(5);
     }
 #endif
 
diff --git a/src/plugins/projectexplorer/projectnodes.cpp b/src/plugins/projectexplorer/projectnodes.cpp
index 68d482264af..27223f066ed 100644
--- a/src/plugins/projectexplorer/projectnodes.cpp
+++ b/src/plugins/projectexplorer/projectnodes.cpp
@@ -3,11 +3,9 @@
 
 #include "projectnodes.h"
 
-#include "buildconfiguration.h"
 #include "buildsystem.h"
 #include "project.h"
 #include "projectexplorerconstants.h"
-#include "projecttree.h"
 #include "target.h"
 
 #include <coreplugin/icore.h>
@@ -21,14 +19,12 @@
 #include <utils/pointeralgorithm.h>
 #include <utils/qtcassert.h>
 #include <utils/stringutils.h>
+#include <utils/threadutils.h>
 #include <utils/utilsicons.h>
 
 #include <QDir>
 #include <QFileInfo>
 #include <QIcon>
-#include <QStyle>
-#include <QThread>
-#include <QTimer>
 
 #include <memory>
 
@@ -445,7 +441,7 @@ QString FolderNode::displayName() const
  */
 QIcon FolderNode::icon() const
 {
-    QTC_CHECK(QThread::currentThread() == QCoreApplication::instance()->thread());
+    QTC_CHECK(isMainThread());
 
     // Instantiating the Icon provider is expensive.
     if (auto strPtr = std::get_if<QString>(&m_icon)) {
@@ -1063,7 +1059,7 @@ DirectoryIcon::DirectoryIcon(const QString &overlay)
 */
 QIcon DirectoryIcon::icon() const
 {
-    QTC_CHECK(QThread::currentThread() == QCoreApplication::instance()->thread());
+    QTC_CHECK(isMainThread());
     const auto it = m_cache.find(m_overlay);
     if (it != m_cache.end())
         return it.value();
diff --git a/src/plugins/projectexplorer/taskhub.cpp b/src/plugins/projectexplorer/taskhub.cpp
index e05d7322428..3bb63b42b8c 100644
--- a/src/plugins/projectexplorer/taskhub.cpp
+++ b/src/plugins/projectexplorer/taskhub.cpp
@@ -9,10 +9,10 @@
 #include <texteditor/textmark.h>
 #include <utils/qtcassert.h>
 #include <utils/theme/theme.h>
+#include <utils/threadutils.h>
 #include <utils/utilsicons.h>
 
 #include <QApplication>
-#include <QThread>
 
 using namespace Utils;
 
@@ -131,7 +131,7 @@ void TaskHub::addTask(Task::TaskType type, const QString &description, Utils::Id
 
 void TaskHub::addTask(Task task)
 {
-    if (QThread::currentThread() != qApp->thread()) {
+    if (!isMainThread()) {
         QMetaObject::invokeMethod(qApp, [task = std::move(task)] {
             TaskHub::addTask(task);
         });
diff --git a/src/plugins/projectexplorer/windebuginterface.cpp b/src/plugins/projectexplorer/windebuginterface.cpp
index a27d3500959..8952f532468 100644
--- a/src/plugins/projectexplorer/windebuginterface.cpp
+++ b/src/plugins/projectexplorer/windebuginterface.cpp
@@ -6,6 +6,7 @@
 #ifdef Q_OS_WIN
 
 #include <utils/qtcassert.h>
+#include <utils/threadutils.h>
 #include <QCoreApplication>
 #include <qt_windows.h>
 
@@ -146,7 +147,7 @@ void WinDebugInterface::emitReadySignal()
 void WinDebugInterface::dispatchDebugOutput()
 {
     // Called in the thread this object was created in, not in the WinDebugInterfaceThread.
-    QTC_ASSERT(QThread::currentThread() == QCoreApplication::instance()->thread(), return);
+    QTC_ASSERT(Utils::isMainThread(), return);
 
     static size_t maxMessagesToSend = 100;
     std::vector<std::pair<qint64, QString>> output;
diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp b/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp
index dfc5667199b..9ccabce38f5 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp
@@ -29,7 +29,6 @@
 #include "nodeabstractproperty.h"
 #include "nodeinstanceserverproxy.h"
 #include "nodelistproperty.h"
-#include "nodeproperty.h"
 #include "pixmapchangedcommand.h"
 #include "puppettocreatorcommand.h"
 #include "qml3dnode.h"
@@ -84,19 +83,18 @@
 #include <utils/qtcassert.h>
 #include <utils/qtcprocess.h>
 #include <utils/theme/theme.h>
+#include <utils/threadutils.h>
 
 #include <qtsupport/qtkitinformation.h>
 
-#include <QUrl>
-#include <QMultiHash>
-#include <QTimerEvent>
-#include <QPicture>
-#include <QPainter>
 #include <QDirIterator>
 #include <QFileSystemWatcher>
+#include <QMultiHash>
+#include <QPainter>
+#include <QPicture>
 #include <QScopedPointer>
-#include <QThread>
-#include <QApplication>
+#include <QTimerEvent>
+#include <QUrl>
 
 enum {
     debug = false
@@ -261,7 +259,7 @@ void NodeInstanceView::modelAttached(Model *model)
     // If model gets attached on non-main thread of the application, do not attempt to monitor
     // file changes. Such models are typically short lived for specific purpose, and timers
     // will not work at all, if the thread is not based on QThread.
-    if (QThread::currentThread() == qApp->thread()) {
+    if (Utils::isMainThread()) {
         m_generateQsbFilesTimer.stop();
         m_qsbTargets.clear();
         updateQsbPathToFilterMap();
diff --git a/src/plugins/resourceeditor/resourceeditorplugin.cpp b/src/plugins/resourceeditor/resourceeditorplugin.cpp
index ddfaa7d27a4..e96bf888cbe 100644
--- a/src/plugins/resourceeditor/resourceeditorplugin.cpp
+++ b/src/plugins/resourceeditor/resourceeditorplugin.cpp
@@ -28,10 +28,8 @@
 #include <utils/parameteraction.h>
 #include <utils/qtcassert.h>
 #include <utils/stringutils.h>
-#include <utils/threadutils.h>
 
 #include <QAction>
-#include <QCoreApplication>
 #include <QDebug>
 #include <QDialogButtonBox>
 #include <QFormLayout>
diff --git a/src/tools/processlauncher/CMakeLists.txt b/src/tools/processlauncher/CMakeLists.txt
index 25b3b461ee2..6efcafbc005 100644
--- a/src/tools/processlauncher/CMakeLists.txt
+++ b/src/tools/processlauncher/CMakeLists.txt
@@ -21,6 +21,8 @@ add_qtc_executable(qtcreator_processlauncher
     ${UTILSDIR}/qtcassert.h
     ${UTILSDIR}/singleton.cpp
     ${UTILSDIR}/singleton.h
+    ${UTILSDIR}/threadutils.cpp
+    ${UTILSDIR}/threadutils.h
     )
 
 if (MSVC)
diff --git a/src/tools/processlauncher/processlauncher.qbs b/src/tools/processlauncher/processlauncher.qbs
index f56ff489cb5..757d50f9bb6 100644
--- a/src/tools/processlauncher/processlauncher.qbs
+++ b/src/tools/processlauncher/processlauncher.qbs
@@ -40,6 +40,8 @@ QtcTool {
             "qtcassert.h",
             "singleton.cpp",
             "singleton.h",
+            "threadutils.cpp",
+            "threadutils.h",
         ]
     }
 }