DeclarativeDebugServer: Instantiate QPluginLoader on heap

The pluginloader is instantiated on heap with server as its parent
so that the connection plugin instance remains loaded in memory.
This prevents the plugin loader in QDeclarativeInspectorService
to accidentally un-load the plugin while it's in use.

Change-Id: I11c82ce595a336ba0fd1b243d23cb497fe355147
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/src/declarative/debugger/qdeclarativedebugserver.cpp b/src/declarative/debugger/qdeclarativedebugserver.cpp
index 12691b2777..fc908f3daa 100644
--- a/src/declarative/debugger/qdeclarativedebugserver.cpp
+++ b/src/declarative/debugger/qdeclarativedebugserver.cpp
@@ -95,7 +95,7 @@ public:
 private:
     // private slot
     void _q_deliverMessage(const QString &serviceName, const QByteArray &message);
-    static QDeclarativeDebugServerConnection *loadConnectionPlugin(const QString &pluginName);
+    static QDeclarativeDebugServerConnection *loadConnectionPlugin(QPluginLoader *loader, const QString &pluginName);
 };
 
 QDeclarativeDebugServerPrivate::QDeclarativeDebugServerPrivate() :
@@ -118,7 +118,7 @@ void QDeclarativeDebugServerPrivate::advertisePlugins()
 }
 
 QDeclarativeDebugServerConnection *QDeclarativeDebugServerPrivate::loadConnectionPlugin(
-    const QString &pluginName)
+        QPluginLoader *loader, const QString &pluginName)
 {
 #ifndef QT_NO_LIBRARY
     QStringList pluginCandidates;
@@ -135,17 +135,17 @@ QDeclarativeDebugServerConnection *QDeclarativeDebugServerPrivate::loadConnectio
     }
 
     foreach (const QString &pluginPath, pluginCandidates) {
-        QPluginLoader loader(pluginPath);
-        if (!loader.load()) {
+        loader->setFileName(pluginPath);
+        if (!loader->load()) {
             continue;
         }
         QDeclarativeDebugServerConnection *connection = 0;
-        if (QObject *instance = loader.instance())
+        if (QObject *instance = loader->instance())
             connection = qobject_cast<QDeclarativeDebugServerConnection*>(instance);
 
         if (connection)
             return connection;
-        loader.unload();
+        loader->unload();
     }
 #endif
     return 0;
@@ -200,8 +200,9 @@ QDeclarativeDebugServer *QDeclarativeDebugServer::instance()
             if (ok) {
                 server = new QDeclarativeDebugServer();
 
+                QPluginLoader *loader = new QPluginLoader(server);
                 QDeclarativeDebugServerConnection *connection
-                        = QDeclarativeDebugServerPrivate::loadConnectionPlugin(pluginName);
+                        = QDeclarativeDebugServerPrivate::loadConnectionPlugin(loader, pluginName);
                 if (connection) {
                     server->d_func()->connection = connection;