Running A Profiled App on X86_64 Android Emulator Qt6.9.1

[SGaist]

Hi,

Are you sure you are closing your application and not just putting it in the background ? Just leaving it to return to the shell (the name is confusing as most people associate shell with a terminal running bash, zsh, etc.) does not equal stopping it.
Also

return ret;

would be the expect way to end your application.

[SMF-Qt]

Yes I was using "return ret;" How would you suggest I close my App?
Thanks

[JonB]

@SMF-Qt
But your code shows you using exit(ret);. @SGaist is suggesting you try replacing it with return ret; (assuming what you showed is in your main()) in case that makes any difference. Have you tried that?

You might put some qDebug() or whatever is appropriate immediately above that just to make sure whether your app really is exiting the exec() loop.

[SMF-Qt]

@JonB

I started with that and it is back in the current main.cpp. The behavior is the same.
The debug version on the X86_64 simulator goes throught this code so I assume the arm64-v8a version on my phones and tablet does too.

[SGaist]

As I wrote before, just returning to the shell does not mean your application is closed.
You have to explicitly close it.

[SMF-Qt]

@SGaist

Thanks but I don't know how that is done on Android.

[SGaist]

AFAIR, if you swipe from the bottom up, it should show you all the applications that are running and you can there stop them.

[SMF-Qt]

@SGaist

Yes I know that but I was looking for a programatic way.

[SGaist]

Depending on what you have in mind, a QTimer calling the application quit slot might do what you want.

[SMF-Qt]

@SGaist

Thanks but I have a quit button on my app which calls QWidget::close on the top level widget which shuts down my application apart from the database which is handled by main.
I have set app->setQuitOnLastWindowClosed(true); and app->exec() is returning 0 so everything is shutdown. once app->exec() returns the database is closed and the app destructors are run via the delete app at the very end of main. I am confident having debugged the emulated version of my app that my code is shutting everything down and exiting with a return value of 0.

[SMF-Qt]

@SMF-Qt
I have noticed that after I click the Quit button and my application has exited main I sometimes get the following abort message from the QtCreator debugger:

W/qtMainLoopThrea: type=1400 audit(0.0:64483): avc: denied { read } for name="/" dev="tmpfs" ino=1 scontext=u:r:untrusted_app:s0:c209,c256,c512,c768 tcontext=u:object_r:device:s0 tclass=dir permissive=0 app=com.home.QtTest4
W/qtMainLoopThrea: type=1400 audit(0.0:64484): avc: denied { read } for name="devices" dev="sysfs" ino=4521 scontext=u:r:untrusted_app:s0:c209,c256,c512,c768 tcontext=u:object_r:sysfs:s0 tclass=dir permissive=0 app=com.home.QtTest4
D/EGL_emulation: app_time_stats: avg=171.19ms min=6.22ms max=947.76ms count=6
I/ImeTracker: com.home.QtTest4:89e0e728: onRequestHide at ORIGIN_CLIENT reason HIDE_SOFT_INPUT fromUser false
I/ImeTracker: com.home.QtTest4:c4e121a7: onRequestHide at ORIGIN_CLIENT reason HIDE_SOFT_INPUT fromUser false
D/EGL_emulation: app_time_stats: avg=2462.04ms min=33.03ms max=10232.86ms count=5
I/default : main() returned 0
D/VRI[QtActivity]: visibilityChanged oldVisibility=true newVisibility=false
W/default : java.lang.NullPointerException: Attempt to invoke virtual method 'void android.content.Context.unregisterReceiver(android.content.BroadcastReceiver)' on a null object reference
W/default : at org.qtproject.qt.android.network.QtNetwork.unregisterReceiver(QtNetwork.java:49)
W/default : at org.qtproject.qt.android.QtNative.startQtApplication(Native Method)
W/default : at org.qtproject.qt.android.QtNative$$ExternalSyntheticLambda4.run(D8$$SyntheticClass:0)
W/default : at org.qtproject.qt.android.QtThread$1.run(QtThread.java:25)
W/default : at java.lang.Thread.run(Thread.java:1012)
W/default :
F/libc : FORTIFY: pthread_mutex_lock called on a destroyed mutex (0x749993a02ab8)
F/libc : FORTIFY: pthread_mutex_lock called on a destroyed mutex (0x749993a02ab8)
F/libc : Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 20289 (hwuiTask0), pid 20225 (.home.QtTest4)
09:24:14: Android target "com.home.QtTest4" died.