ios: cleaner kill of subprocess of iostoolhandler

try to first terminate (sig TERM) the tool before
killing it (this ensures a cleaner shutdown of the
connection to the device).

Task-number: QTCREATORBUG-10922
Change-Id: Ib39fbd1d35a651cdb51364532bdef5b69cb1347e
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/plugins/ios/iostoolhandler.cpp

@@ -43,6 +43,7 @@
 #include <QScopedArrayPointer>
 #include <QProcessEnvironment>
 #include <QFileInfo>
+#include <QTimer>
 
 #include <string.h>
 #include <errno.h>
@@ -149,12 +150,14 @@ public:
     void subprocessError(QProcess::ProcessError error);
     void subprocessFinished(int exitCode, QProcess::ExitStatus exitStatus);
     void subprocessHasData();
+    void killProcess();
     virtual bool expectsFileDescriptor() = 0;
 protected:
     void processXml();
 
     IosToolHandler *q;
     QProcess process;
+    QTimer killTimer;
     QXmlStreamReader outputParser;
     QString deviceId;
     QString bundlePath;
@@ -200,6 +203,7 @@ IosToolHandlerPrivate::IosToolHandlerPrivate(IosToolHandler::DeviceType devType,
     q(q), state(NonStarted), devType(devType), iBegin(0), iEnd(0),
     gdbSocket(-1)
 {
+    killTimer.setSingleShot(true);
     QProcessEnvironment env(QProcessEnvironment::systemEnvironment());
     foreach (const QString &k, env.keys())
         if (k.startsWith(QLatin1String("DYLD_")))
@@ -219,6 +223,8 @@ IosToolHandlerPrivate::IosToolHandlerPrivate(IosToolHandler::DeviceType devType,
             q, SLOT(subprocessFinished(int,QProcess::ExitStatus)));
     QObject::connect(&process, SIGNAL(error(QProcess::ProcessError)),
             q, SLOT(subprocessError(QProcess::ProcessError)));
+    QObject::connect(&killTimer, SIGNAL(timeout()),
+            q, SLOT(killProcess()));
 }
 
 bool IosToolHandlerPrivate::isRunning()
@@ -268,8 +274,10 @@ void IosToolHandlerPrivate::stop(int errorCode)
     case Stopped:
         return;
     }
-    if (process.state() != QProcess::NotRunning)
+    if (process.state() != QProcess::NotRunning) {
-        process.kill();
+        process.terminate();
+        killTimer.start(1500);
+    }
 }
 
 // signals
@@ -341,6 +349,7 @@ void IosToolHandlerPrivate::subprocessFinished(int exitCode, QProcess::ExitStatu
     stop((exitStatus == QProcess::NormalExit) ? exitCode : -1 );
     if (debugToolHandler)
         qDebug() << "IosToolHandler::finished(" << this << ")";
+    killTimer.stop();
     emit q->finished(q);
 }
 
@@ -693,6 +702,12 @@ void IosSimulatorToolHandlerPrivate::addDeviceArguments(QStringList &args) const
     }
 }
 
+void IosToolHandlerPrivate::killProcess()
+{
+    if (process.state() != QProcess::NotRunning)
+        process.kill();
+}
+
 } // namespace Internal
 
 QString IosToolHandler::iosDeviceToolPath()
@@ -763,4 +778,9 @@ void IosToolHandler::subprocessHasData()
     d->subprocessHasData();
 }
 
+void IosToolHandler::killProcess()
+{
+    d->killProcess();
+}
+
 } // namespace Ios

src/plugins/ios/iostoolhandler.h

@@ -99,6 +99,7 @@ private slots:
     void subprocessError(QProcess::ProcessError error);
     void subprocessFinished(int exitCode, QProcess::ExitStatus exitStatus);
     void subprocessHasData();
+    void killProcess();
 private:
     friend class Ios::Internal::IosToolHandlerPrivate;
     Ios::Internal::IosToolHandlerPrivate *d;