diff --git a/src/libs/extensionsystem/pluginmanager.cpp b/src/libs/extensionsystem/pluginmanager.cpp
index 3ee99510552..ae2dbf8903b 100644
--- a/src/libs/extensionsystem/pluginmanager.cpp
+++ b/src/libs/extensionsystem/pluginmanager.cpp
@@ -1034,6 +1034,7 @@ void PluginManagerPrivate::readSettings()
 */
 void PluginManagerPrivate::stopAll()
 {
+    m_isShuttingDown = true;
     if (delayedInitializeTimer && delayedInitializeTimer->isActive()) {
         delayedInitializeTimer->stop();
         delete delayedInitializeTimer;
@@ -1839,6 +1840,11 @@ bool PluginManager::isInitializationDone()
     return d->m_isInitializationDone;
 }
 
+bool PluginManager::isShuttingDown()
+{
+    return d->m_isShuttingDown;
+}
+
 /*!
     Retrieves one object with \a name from the object pool.
     \sa addObject()
diff --git a/src/libs/extensionsystem/pluginmanager.h b/src/libs/extensionsystem/pluginmanager.h
index a56cb7ba9d4..ecd0ee70b73 100644
--- a/src/libs/extensionsystem/pluginmanager.h
+++ b/src/libs/extensionsystem/pluginmanager.h
@@ -129,6 +129,7 @@ public:
     static QString platformName();
 
     static bool isInitializationDone();
+    static bool isShuttingDown();
 
     static void remoteArguments(const QString &serializedArguments, QObject *socket);
     static void shutdown();
diff --git a/src/libs/extensionsystem/pluginmanager_p.h b/src/libs/extensionsystem/pluginmanager_p.h
index 86c3a6c3624..c7a4291a6b7 100644
--- a/src/libs/extensionsystem/pluginmanager_p.h
+++ b/src/libs/extensionsystem/pluginmanager_p.h
@@ -124,6 +124,7 @@ public:
 
     bool m_isInitializationDone = false;
     bool enableCrashCheck = true;
+    bool m_isShuttingDown = false;
 
     QHash<QString, std::function<bool()>> m_scenarios;
     QString m_requestedScenario;
diff --git a/src/plugins/coreplugin/locator/locator.cpp b/src/plugins/coreplugin/locator/locator.cpp
index fb9f50c3b1f..55b82920329 100644
--- a/src/plugins/coreplugin/locator/locator.cpp
+++ b/src/plugins/coreplugin/locator/locator.cpp
@@ -26,6 +26,8 @@
 #include "../settingsdatabase.h"
 #include "../statusbarmanager.h"
 
+#include <extensionsystem/pluginmanager.h>
+
 #include <utils/algorithm.h>
 #include <utils/async.h>
 #include <utils/qtcassert.h>
@@ -147,7 +149,6 @@ bool Locator::delayedInitialize()
 
 void Locator::aboutToShutdown()
 {
-    m_shuttingDown = true;
     m_refreshTimer.stop();
     m_taskTree.reset();
 }
@@ -373,7 +374,7 @@ void Locator::setUseCenteredPopupForShortcut(bool center)
 
 void Locator::refresh(const QList<ILocatorFilter *> &filters)
 {
-    if (m_shuttingDown)
+    if (ExtensionSystem::PluginManager::isShuttingDown())
         return;
 
     m_taskTree.reset(); // Superfluous, just for clarity. The next reset() below is enough.
diff --git a/src/plugins/coreplugin/locator/locator.h b/src/plugins/coreplugin/locator/locator.h
index 3e73054153c..45d4b650508 100644
--- a/src/plugins/coreplugin/locator/locator.h
+++ b/src/plugins/coreplugin/locator/locator.h
@@ -67,7 +67,6 @@ private:
         bool useCenteredPopup = false;
     };
 
-    bool m_shuttingDown = false;
     bool m_settingsInitialized = false;
     Settings m_settings;
     QList<ILocatorFilter *> m_filters;
diff --git a/src/plugins/debugger/debuggerplugin.cpp b/src/plugins/debugger/debuggerplugin.cpp
index 87ae84dd8d6..7ccc808b08f 100644
--- a/src/plugins/debugger/debuggerplugin.cpp
+++ b/src/plugins/debugger/debuggerplugin.cpp
@@ -686,7 +686,6 @@ public:
 
     EngineManager m_engineManager;
     QTimer m_shutdownTimer;
-    bool m_shuttingDown = false;
 
     Console m_console; // ensure Debugger Console is created before settings are taken into account
     DebuggerSettings m_debuggerSettings;
@@ -1392,7 +1391,7 @@ static QVariant configValue(const QString &name)
 
 void DebuggerPluginPrivate::updatePresetState()
 {
-    if (m_shuttingDown)
+    if (PluginManager::isShuttingDown())
         return;
 
     Project *startupProject = ProjectManager::startupProject();
@@ -1996,8 +1995,6 @@ void DebuggerPluginPrivate::dumpLog()
 
 void DebuggerPluginPrivate::aboutToShutdown()
 {
-    m_shuttingDown = true;
-
     disconnect(ProjectManager::instance(), &ProjectManager::startupProjectChanged, this, nullptr);
 
     m_shutdownTimer.setInterval(0);
@@ -2081,7 +2078,7 @@ QWidget *addSearch(BaseTreeView *treeView)
 
 void openTextEditor(const QString &titlePattern0, const QString &contents)
 {
-    if (dd->m_shuttingDown)
+    if (PluginManager::isShuttingDown())
         return;
     QString titlePattern = titlePattern0;
     IEditor *editor = EditorManager::openEditorWithContents(
diff --git a/src/plugins/emacskeys/emacskeysplugin.cpp b/src/plugins/emacskeys/emacskeysplugin.cpp
index acb2be5b892..4f1fa8c2c82 100644
--- a/src/plugins/emacskeys/emacskeysplugin.cpp
+++ b/src/plugins/emacskeys/emacskeysplugin.cpp
@@ -135,11 +135,6 @@ void EmacsKeysPlugin::extensionsInitialized()
 {
 }
 
-ExtensionSystem::IPlugin::ShutdownFlag EmacsKeysPlugin::aboutToShutdown()
-{
-    return SynchronousShutdown;
-}
-
 void EmacsKeysPlugin::editorAboutToClose(IEditor *editor)
 {
     auto w = qobject_cast<QPlainTextEdit*>(editor->widget());
diff --git a/src/plugins/emacskeys/emacskeysplugin.h b/src/plugins/emacskeys/emacskeysplugin.h
index b0acb078cc0..ab124b47ce3 100644
--- a/src/plugins/emacskeys/emacskeysplugin.h
+++ b/src/plugins/emacskeys/emacskeysplugin.h
@@ -57,7 +57,6 @@ public:
 
     void initialize() override;
     void extensionsInitialized() override;
-    ShutdownFlag aboutToShutdown() override;
 
 private:
     void editorAboutToClose(Core::IEditor *editor);
diff --git a/src/plugins/languageclient/client.cpp b/src/plugins/languageclient/client.cpp
index 77b2cbfdee5..5b0fbfa304f 100644
--- a/src/plugins/languageclient/client.cpp
+++ b/src/plugins/languageclient/client.cpp
@@ -28,6 +28,8 @@
 #include <coreplugin/messagemanager.h>
 #include <coreplugin/progressmanager/progressmanager.h>
 
+#include <extensionsystem/pluginmanager.h>
+
 #include <languageserverprotocol/completion.h>
 #include <languageserverprotocol/diagnostics.h>
 #include <languageserverprotocol/initializemessages.h>
@@ -194,7 +196,7 @@ public:
         // temporary container needed since m_resetAssistProvider is changed in resetAssistProviders
         for (TextDocument *document : m_resetAssistProvider.keys())
             resetAssistProviders(document);
-        if (!LanguageClientManager::isShuttingDown()) {
+        if (!ExtensionSystem::PluginManager::isShuttingDown()) {
             // prevent accessing deleted editors on Creator shutdown
             const QList<Core::IEditor *> &editors = Core::DocumentModel::editorsForOpenedDocuments();
             for (Core::IEditor *editor : editors) {
diff --git a/src/plugins/languageclient/languageclientmanager.cpp b/src/plugins/languageclient/languageclientmanager.cpp
index 4de4a0de46e..4c8fa425303 100644
--- a/src/plugins/languageclient/languageclientmanager.cpp
+++ b/src/plugins/languageclient/languageclientmanager.cpp
@@ -14,6 +14,8 @@
 #include <coreplugin/icore.h>
 #include <coreplugin/navigationwidget.h>
 
+#include <extensionsystem/pluginmanager.h>
+
 #include <languageserverprotocol/messages.h>
 #include <languageserverprotocol/progresssupport.h>
 
@@ -32,6 +34,7 @@
 
 #include <QTimer>
 
+using namespace ExtensionSystem;
 using namespace LanguageServerProtocol;
 
 namespace LanguageClient {
@@ -39,7 +42,6 @@ namespace LanguageClient {
 static Q_LOGGING_CATEGORY(Log, "qtc.languageclient.manager", QtWarningMsg)
 
 static LanguageClientManager *managerInstance = nullptr;
-static bool g_shuttingDown = false;
 
 class LanguageClientManagerPrivate
 {
@@ -139,7 +141,7 @@ void LanguageClientManager::clientStarted(Client *client)
     QTC_ASSERT(client, return);
     if (client->state() != Client::Uninitialized) // do not proceed if we already received an error
         return;
-    if (g_shuttingDown) {
+    if (PluginManager::isShuttingDown()) {
         clientFinished(client);
         return;
     }
@@ -165,7 +167,7 @@ void LanguageClientManager::clientFinished(Client *client)
                                   && client->state() != Client::ShutdownRequested;
 
     if (unexpectedFinish) {
-        if (!g_shuttingDown) {
+        if (!PluginManager::isShuttingDown()) {
             const QList<TextEditor::TextDocument *> &clientDocs
                 = managerInstance->m_clientForDocument.keys(client);
             if (client->reset()) {
@@ -187,7 +189,7 @@ void LanguageClientManager::clientFinished(Client *client)
         }
     }
     deleteClient(client);
-    if (g_shuttingDown && managerInstance->m_clients.isEmpty())
+    if (PluginManager::isShuttingDown() && managerInstance->m_clients.isEmpty())
         emit managerInstance->shutdownFinished();
 }
 
@@ -236,17 +238,14 @@ void LanguageClientManager::deleteClient(Client *client)
     for (QList<Client *> &clients : managerInstance->m_clientsForSetting)
         clients.removeAll(client);
     client->deleteLater();
-    if (!g_shuttingDown)
+    if (!PluginManager::isShuttingDown())
         emit instance()->clientRemoved(client);
 }
 
 void LanguageClientManager::shutdown()
 {
     QTC_ASSERT(managerInstance, return);
-    if (g_shuttingDown)
-        return;
     qCDebug(Log) << "shutdown manager";
-    g_shuttingDown = true;
     const auto clients = managerInstance->clients();
     for (Client *client : clients)
         shutdownClient(client);
@@ -258,11 +257,6 @@ void LanguageClientManager::shutdown()
     });
 }
 
-bool LanguageClientManager::isShuttingDown()
-{
-    return g_shuttingDown;
-}
-
 LanguageClientManager *LanguageClientManager::instance()
 {
     return managerInstance;
diff --git a/src/plugins/languageclient/languageclientmanager.h b/src/plugins/languageclient/languageclientmanager.h
index fdbbec98b6f..e29d87a0f23 100644
--- a/src/plugins/languageclient/languageclientmanager.h
+++ b/src/plugins/languageclient/languageclientmanager.h
@@ -48,7 +48,6 @@ public:
     static void deleteClient(Client *client);
 
     static void shutdown();
-    static bool isShuttingDown();
 
     static LanguageClientManager *instance();
 
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index e75e23d18f9..d1ad20fe57c 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -177,6 +177,7 @@
 */
 
 using namespace Core;
+using namespace ExtensionSystem;
 using namespace ProjectExplorer::Internal;
 using namespace Utils;
 
@@ -600,7 +601,6 @@ public:
     BuildPropertiesSettings m_buildPropertiesSettings;
     QList<CustomParserSettings> m_customParsers;
     bool m_shouldHaveRunConfiguration = false;
-    bool m_shuttingDown = false;
     Id m_runMode = Constants::NO_RUN_MODE;
 
     ToolChainManager *m_toolChainManager = nullptr;
@@ -1632,11 +1632,11 @@ bool ProjectExplorerPlugin::initialize(const QStringList &arguments, QString *er
     connect(ICore::instance(), &ICore::saveSettingsRequested,
             dd, &ProjectExplorerPluginPrivate::savePersistentSettings);
     connect(EditorManager::instance(), &EditorManager::autoSaved, this, [] {
-        if (!dd->m_shuttingDown && !SessionManager::loadingSession())
+        if (!PluginManager::isShuttingDown() && !SessionManager::loadingSession())
             SessionManager::saveSession();
     });
     connect(qApp, &QApplication::applicationStateChanged, this, [](Qt::ApplicationState state) {
-        if (!dd->m_shuttingDown && state == Qt::ApplicationActive)
+        if (!PluginManager::isShuttingDown() && state == Qt::ApplicationActive)
             dd->updateWelcomePage();
     });
 
@@ -2173,7 +2173,7 @@ void ProjectExplorerPluginPrivate::updateRunWithoutDeployMenu()
     m_runWithoutDeployAction->setVisible(m_projectExplorerSettings.deployBeforeRun);
 }
 
-ExtensionSystem::IPlugin::ShutdownFlag ProjectExplorerPlugin::aboutToShutdown()
+IPlugin::ShutdownFlag ProjectExplorerPlugin::aboutToShutdown()
 {
     disconnect(ModeManager::instance(), &ModeManager::currentModeChanged,
                dd, &ProjectExplorerPluginPrivate::currentModeChanged);
@@ -2181,8 +2181,6 @@ ExtensionSystem::IPlugin::ShutdownFlag ProjectExplorerPlugin::aboutToShutdown()
     ToolChainManager::aboutToShutdown();
     ProjectManager::closeAllProjects();
 
-    dd->m_shuttingDown = true;
-
     // Attempt to synchronously shutdown all run controls.
     // If that fails, fall back to asynchronous shutdown (Debugger run controls
     // might shutdown asynchronously).
@@ -2251,7 +2249,7 @@ bool ProjectExplorerPluginPrivate::closeAllFilesInProject(const Project *project
 
 void ProjectExplorerPluginPrivate::savePersistentSettings()
 {
-    if (dd->m_shuttingDown)
+    if (PluginManager::isShuttingDown())
         return;
 
     if (!SessionManager::loadingSession())  {
@@ -2560,7 +2558,7 @@ void ProjectExplorerPluginPrivate::checkForShutdown()
 {
     --m_activeRunControlCount;
     QTC_ASSERT(m_activeRunControlCount >= 0, m_activeRunControlCount = 0);
-    if (m_shuttingDown && m_activeRunControlCount == 0)
+    if (PluginManager::isShuttingDown() && m_activeRunControlCount == 0)
         emit m_instance->asynchronousShutdownFinished();
 }
 
diff --git a/src/plugins/qmljseditor/qmljseditorplugin.cpp b/src/plugins/qmljseditor/qmljseditorplugin.cpp
index 884670c4faf..d695989825d 100644
--- a/src/plugins/qmljseditor/qmljseditorplugin.cpp
+++ b/src/plugins/qmljseditor/qmljseditorplugin.cpp
@@ -210,11 +210,6 @@ void QmlJSEditorPlugin::extensionsInitialized()
     QmllsSettingsManager::instance()->setupAutoupdate();
 }
 
-ExtensionSystem::IPlugin::ShutdownFlag QmlJSEditorPlugin::aboutToShutdown()
-{
-    return IPlugin::aboutToShutdown();
-}
-
 Utils::JsonSchemaManager *QmlJSEditorPlugin::jsonManager()
 {
     return &m_instance->d->m_jsonManager;
diff --git a/src/plugins/qmljseditor/qmljseditorplugin.h b/src/plugins/qmljseditor/qmljseditorplugin.h
index cc1b63fe68a..aa653ac6cb0 100644
--- a/src/plugins/qmljseditor/qmljseditorplugin.h
+++ b/src/plugins/qmljseditor/qmljseditorplugin.h
@@ -29,7 +29,6 @@ public:
 private:
     void initialize() final;
     void extensionsInitialized() final;
-    ShutdownFlag aboutToShutdown() final;
 
     class QmlJSEditorPluginPrivate *d = nullptr;
 };