Support for LTTNG and ETW tracing

This commit introduces minimal support for instrumentation within Qt.
Currently, only LTTNG/Linux and ETW/Windows are supported.

Change-Id: I59b48cf83acf5532a998bb493e6379e9177e14c8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

4 files changed, 15 insertions, 4 deletions

diff --git a/src/corelib/plugin/qfactoryloader.cpp b/src/corelib/plugin/qfactoryloader.cpp
index 0cc193c325..a4be18a67f 100644
--- a/src/corelib/plugin/qfactoryloader.cpp
+++ b/src/corelib/plugin/qfactoryloader.cpp
@@ -54,6 +54,8 @@
 #include "qjsonobject.h"
 #include "qjsonarray.h"
 
+#include <qtcore_tracepoints_p.h>
+
 QT_BEGIN_NAMESPACE
 
 class QFactoryLoaderPrivate : public QObjectPrivate
@@ -142,6 +144,9 @@ void QFactoryLoader::update()
             if (qt_debug_component()) {
                 qDebug() << "QFactoryLoader::QFactoryLoader() looking at" << fileName;
             }
+
+            Q_TRACE(qfactoryloader_update, fileName);
+
             library = QLibraryPrivate::findOrCreate(QFileInfo(fileName).canonicalFilePath());
             if (!library->isPlugin()) {
                 if (qt_debug_component()) {
diff --git a/src/corelib/plugin/qlibrary.cpp b/src/corelib/plugin/qlibrary.cpp
index ebad7f1751..bca6918b4a 100644
--- a/src/corelib/plugin/qlibrary.cpp
+++ b/src/corelib/plugin/qlibrary.cpp
@@ -64,6 +64,8 @@
 #include "qelfparser_p.h"
 #include "qmachparser_p.h"
 
+#include <qtcore_tracepoints_p.h>
+
 QT_BEGIN_NAMESPACE
 
 #ifdef QT_NO_DEBUG
@@ -535,6 +537,8 @@ bool QLibraryPrivate::load()
     if (fileName.isEmpty())
         return false;
 
+    Q_TRACE(qlibraryprivate_load_entry, fileName);
+
     bool ret = load_sys();
     if (qt_debug_component()) {
         if (ret) {
@@ -551,6 +555,8 @@ bool QLibraryPrivate::load()
         installCoverageTool(this);
     }
 
+    Q_TRACE(qlibraryprivate_load_exit, ret);
+
     return ret;
 }
 
diff --git a/src/corelib/plugin/quuid.cpp b/src/corelib/plugin/quuid.cpp
index 3a1c0495fe..5dfbf23c33 100644
--- a/src/corelib/plugin/quuid.cpp
+++ b/src/corelib/plugin/quuid.cpp
@@ -143,7 +143,6 @@ static QUuid _q_uuidFromHex(const char *src)
     return QUuid();
 }
 
-#ifndef QT_BOOTSTRAPPED
 static QUuid createFromName(const QUuid &ns, const QByteArray &baseData, QCryptographicHash::Algorithm algorithm, int version)
 {
     QByteArray hashResult;
@@ -166,7 +165,6 @@ static QUuid createFromName(const QUuid &ns, const QByteArray &baseData, QCrypto
 
     return result;
 }
-#endif
 
 /*!
     \class QUuid
@@ -488,12 +486,12 @@ QUuid QUuid::createUuidV3(const QUuid &ns, const QByteArray &baseData)
 {
     return createFromName(ns, baseData, QCryptographicHash::Md5, 3);
 }
+#endif
 
 QUuid QUuid::createUuidV5(const QUuid &ns, const QByteArray &baseData)
 {
     return createFromName(ns, baseData, QCryptographicHash::Sha1, 5);
 }
-#endif
 
 /*!
   Creates a QUuid object from the binary representation of the UUID, as
diff --git a/src/corelib/plugin/quuid.h b/src/corelib/plugin/quuid.h
index ee0a9f9dac..014b69831e 100644
--- a/src/corelib/plugin/quuid.h
+++ b/src/corelib/plugin/quuid.h
@@ -192,18 +192,20 @@ public:
     static QUuid createUuid();
 #ifndef QT_BOOTSTRAPPED
     static QUuid createUuidV3(const QUuid &ns, const QByteArray &baseData);
+#endif
     static QUuid createUuidV5(const QUuid &ns, const QByteArray &baseData);
+#ifndef QT_BOOTSTRAPPED
     static inline QUuid createUuidV3(const QUuid &ns, const QString &baseData)
     {
         return QUuid::createUuidV3(ns, baseData.toUtf8());
     }
+#endif
 
     static inline QUuid createUuidV5(const QUuid &ns, const QString &baseData)
     {
         return QUuid::createUuidV5(ns, baseData.toUtf8());
     }
 
-#endif
 
     QUuid::Variant variant() const Q_DECL_NOTHROW;
     QUuid::Version version() const Q_DECL_NOTHROW;