From 5e5072c654d4ce8d30ce7c116639a71e610fdb78 Mon Sep 17 00:00:00 2001
From: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Date: Mon, 18 Jun 2018 17:46:44 +0200
Subject: [PATCH] Tracepoints: trace QObject construction and destruction

Change-Id: I10f5ef391a2d3059ed5e8a26afe5e191adc31e85
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
---
 src/corelib/kernel/qobject.cpp | 5 +++++
 src/corelib/qtcore.tracepoints | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 5387d549c6..2dcfa33629 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -64,6 +64,7 @@
 
 #include <private/qorderedmutexlocker_p.h>
 #include <private/qhooks_p.h>
+#include <qtcore_tracepoints_p.h>
 
 #include <new>
 
@@ -820,6 +821,7 @@ QObject::QObject(QObject *parent)
 #endif
     if (Q_UNLIKELY(qtHookData[QHooks::AddQObject]))
         reinterpret_cast<QHooks::AddQObjectCallback>(qtHookData[QHooks::AddQObject])(this);
+    Q_TRACE(QObject_ctor, this);
 }
 
 /*!
@@ -855,6 +857,7 @@ QObject::QObject(QObjectPrivate &dd, QObject *parent)
 #endif
     if (Q_UNLIKELY(qtHookData[QHooks::AddQObject]))
         reinterpret_cast<QHooks::AddQObjectCallback>(qtHookData[QHooks::AddQObject])(this);
+    Q_TRACE(QObject_ctor, this);
 }
 
 /*!
@@ -1030,6 +1033,8 @@ QObject::~QObject()
     if (Q_UNLIKELY(qtHookData[QHooks::RemoveQObject]))
         reinterpret_cast<QHooks::RemoveQObjectCallback>(qtHookData[QHooks::RemoveQObject])(this);
 
+    Q_TRACE(QObject_dtor, this);
+
     if (d->parent)        // remove it from parent object
         d->setParent_helper(0);
 }
diff --git a/src/corelib/qtcore.tracepoints b/src/corelib/qtcore.tracepoints
index 391e4087e5..2e78490ab5 100644
--- a/src/corelib/qtcore.tracepoints
+++ b/src/corelib/qtcore.tracepoints
@@ -20,3 +20,6 @@ QCoreApplication_notify_entry(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)
+
+QObject_ctor(QObject *object)
+QObject_dtor(QObject *object)