Add missing _exit tracepoints for event handling

This allows tools that look for matching `foo_entry/exit` pairs in the
trace data to work properly. An unmatched `_entry` would otherwise
confuse them, making them think that the call stack is continuously
increasing.

Change-Id: Idff7f587ea25c46ec86ad623cc82d503db34a194
Reviewed-by: Christoph Sterz <christoph.sterz@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qcoreapplication.cpp

@@ -1197,7 +1197,7 @@ bool QCoreApplicationPrivate::notify_helper(QObject *receiver, QEvent * event)
 {
     // Note: when adjusting the tracepoints in here
     // consider adjusting QApplicationPrivate::notify_helper too.
-    Q_TRACE(QCoreApplication_notify_entry, receiver, event, event->type());
+    Q_TRACE_SCOPE(QCoreApplication_notify, receiver, event, event->type());
 
     // send to all application event filters (only does anything in the main thread)
     if (QCoreApplication::self
@@ -1489,7 +1489,7 @@ bool QCoreApplication::sendSpontaneousEvent(QObject *receiver, QEvent *event)
 */
 void QCoreApplication::postEvent(QObject *receiver, QEvent *event, int priority)
 {
-    Q_TRACE(QCoreApplication_postEvent_entry, receiver, event, event->type());
+    Q_TRACE_SCOPE(QCoreApplication_postEvent, receiver, event, event->type());
 
     if (receiver == 0) {
         qWarning("QCoreApplication::postEvent: Unexpected null receiver");

src/corelib/qtcore.tracepoints

@@ -16,6 +16,7 @@ QEvent_ctor(QEvent *event, int type)
 QEvent_dtor(QEvent *event, int type)
 
 QCoreApplication_postEvent_entry(QObject *receiver, QEvent *event, int type)
+QCoreApplication_postEvent_exit(QObject *receiver, QEvent *event, int type)
 QCoreApplication_postEvent_event_compressed(QObject *receiver, QEvent *event)
 QCoreApplication_postEvent_event_posted(QObject *receiver, QEvent *event, int type)
 
@@ -23,6 +24,7 @@ QCoreApplication_sendEvent(QObject *receiver, QEvent *event, int type)
 QCoreApplication_sendSpontaneousEvent(QObject *receiver, QEvent *event, int type)
 
 QCoreApplication_notify_entry(QObject *receiver, QEvent *event, int type)
+QCoreApplication_notify_exit(QObject *receiver, QEvent *event, int type)
 QCoreApplication_notify_event_filtered(QObject *receiver, QEvent *event, int type)
 QCoreApplication_notify_before_delivery(QObject *receiver, QEvent *event, int type)
 QCoreApplication_notify_after_delivery(QObject *receiver, QEvent *event, int type, bool consumed)

src/widgets/kernel/qapplication.cpp

@@ -3697,7 +3697,7 @@ bool QApplicationPrivate::notify_helper(QObject *receiver, QEvent * e)
     // to the ones in QCoreApplicationPrivate::notify_helper; the reason for their
     // duplication is because tracepoint symbols are not exported by QtCore.
     // If you adjust the tracepoints here, consider adjusting QCoreApplicationPrivate too.
-    Q_TRACE(QApplication_notify_entry, receiver, e, e->type());
+    Q_TRACE_SCOPE(QApplication_notify, receiver, e, e->type());
 
     // send to all application event filters
     if (threadRequiresCoreApplication()

src/widgets/qtwidgets.tracepoints

@@ -5,6 +5,7 @@ QT_END_NAMESPACE
 }
 
 QApplication_notify_entry(QObject *receiver, QEvent *event, int type)
+QApplication_notify_exit(QObject *receiver, QEvent *event, int type)
 QApplication_notify_event_filtered(QObject *receiver, QEvent *event, int type)
 QApplication_notify_before_delivery(QObject *receiver, QEvent *event, int type)
 QApplication_notify_after_delivery(QObject *receiver, QEvent *event, int type, bool consumed)