Qt C++ restart itself

Question

The app is memory leaking, so as a temporary solution I would check how much memory it takes, kill the process and restart the app.

Is there any easy way to do that?

Thank you

Answer 1

You should fix the memory leak. Any way if you want to restart your application, you can use QProcess::startDetached to run an instance of your application in a new process and detach from it. After that you should exit the application.

This will restart your application :

QProcess process;
process.startDetached("myApp",QStringList());

qApp->quit();

Here myApp is the name of the executable file of the application. On Windows it can be myApp.exe.

Answer 2

You could override new and delete to keep allocation statistics for the program and then when a threshold is reached based on available mem, abort(). Then in an external script you could restart.

Also see the excellent gimli monitor, here: https://bitbucket.org/wez/gimli/wiki/Monitor

Answer 3

To restart application by itself, try:

#include <QApplication>
#include <QProcess>

...

// restart:
qApp->quit();
QProcess::startDetached(qApp->arguments()[0], qApp->arguments());