I am having an issue where when I swipe up on my app to close in the simulator, the app will not open again unless re-run. I am getting an error Message from debugger: Terminated due to signal 9. I looked this up and read the issue may be related to CPU usage on the device but mine is very low. I am not even sure how to begin debugging as it is not clear where the issue is coming from. I am getting the user's location but I am doubtful that is causing the issue. I've also read a bit about background tasks causing this but am not confident this is my issue. I know this is a vague issue and I am happy to post code snippets once I can narrow down where the problem may lie. Does anyone know where I can begin debugging?
There's nothing to debug here. What you're describing is the expected behaviour of the task manager: swiping up kills a running app, in a way that cannot be intercepted or denied, using signal 9, SIGKILL.
You get the "Terminated due to signal 9" message, when your app gets killed. It might occcur when you swipe up and kill your app when it is running or else if you go to settings and change privacy settings for your app like changing location services or camera permissions for the app. It might also happen when you are debugging in your iphone device and the lightning cable is faulty, it will disconnect and the terminated signal will be thrown in the debugger.
Related
In an iOS Mobile App why does crashlytics log crash and send email, when the iOS app is opened after the crash. This behavior is not consistent when crashlytics is integrated with android app.
Typically after a crash, user will stop using the app and not open it again. As a consequence we end up missing several crashes which happen in iOS.
Mike from Fabric here. The behavior is different on each platform since each platform has different behaviors for exception handling and networking.
On iOS, it's unsafe to send much, if any, data after an exception happens that leads to a crash. The app is a horrible state and the device is also resolving an unexpected situation. If, we or other services, tried to send additional data then, you could run the risk of causing an issue on the entire device which it would require the device to restart. Asking a user to restart their device is a much worse behavior then having them need to relaunch the app.
You are correct that some users may never relaunch the app and those crashes are lost, but in general, we've found most users relaunch the app post-crash.
As #Dev_Tandel said, on Android, other background networking services can be used to try and send the crash report then. We will try to do that, but don't guarantee that a report will be sent until the app is relaunched.
I submitted my app to iOS the other day and unfortunately it got rejected. Apparently it crashed on launch. The game runs perfectly on Android, and I cannot re-create this "crash on launch" on iOS. For me it just works. But my test-environment is limited to an iphone 5 and emulators.
Could someone please take a look at these error logs and see if they can find something?
Error log: Here
If you know why, or have any ideas/suggestion, please let me know.
According to log your exception code 0x8badf00d . This code indicates that an application was terminated by iOS because a watchdog timeout occurred. Basically, the application took too long to launch, terminate, or respond to system events.
How can I solve this problem, I don't know that did it affect to my problem in this link My previous problem about Core data ?
This message will occur when I cmd+Q of the application.
Message from debugger: Terminated due to signal 15
and if who know the solution of my previous problem please tell me.
Message from debugger: Terminated due to signal 15 occurs whenever the user manually terminates the application (whether simulated in iOS simulator or on a provisioned iOS device) through CMD-Q (Quit) or STOP, which is toggled after you click on RUN.
In OS terms, signal 15 is a Linux enumeration for the signal, SIGTERM, which means signal terminate.
Message from debugger: Terminated due to signal 15 usually means that you quit the simulator while running the program.
I have same issue when i take screen short from simulator then terminated. This is xcode bug.
Just update your xcode version.
This only means that the system sent your application the kill signal. The system may do that for any number of reasons. It does not necessarily mean the application was killed due to memory pressure. In fact, this is very unlikely in the case that you describe. Most of the reasons the system might send a kill signal won't happen when the app is being debugged.
When the system kills an application it will track the reason and log it. If you are using a third party crash reporting service this will not capture the reason, and in fact can prevent a lot of critical information from being logged by the system.
Look for logs on the device. Watch the console log on the device when the issues reproduces - usually you will be able to see why it was killed. If it was memory pressure there would be a JetsamEvent log as well.
It is much more likely that your application is doing something "in the background" that it does not have a background mode or entitlement for. For example, it may be doing something past the background task assertion time limit, etc.
As far as your CPU and memory use, do not trust the gauges in Xcode. These are just an estimate and are often way off, and they do not capture the information you actually need (like dirty VM usage). Instead use Instruments.
https://www.reddit.com/r/iOSProgramming/comments/822id9/ideas_for_debugging_a_memory_leak_terminated_due/
I'm using Xcode 5.1.1 making a game app in iOS 6+. I am currently not a member of apple development, at least not until i finish the game completely. Sometimes right after i quit the simulator i get a "Terminating in response to SpringBoard's termination" message appear. I know it's a memory management issue but with ARC i don't deal with memory. Also does this have something to do with the size of my app? But i don't know it's size. One minute Xcode shows 40mb and the next it'll show 12mb or 20 mb and other mb's in between so i don't know. Lets say i publish the app in app store and don't fix this rare termination issue, how would that affect the user when using my app? How would i fix this termination message issue?
If you're quitting the simulator via command-Q, then a "Terminating in response to SpringBoard's termination" message is actually proper (the simulating app is terminating before the simulator -- that app known internally to Apple engineers as SpringBoard -- terminates).
As for your memory worries, once you get the hang of Xcode, you should try running your app under Xcode Instruments and with the Activity Monitor template and/or the Allocations template.
When I use the 5.0 simulator I don't get any error at all.
When I use the 4.3 simulator I get the following message when I stop the execution of the app in Xcode using the the stop button.
Basically, I am navigating through my program and I launch a view with a uiwebview the following comes up in the console:
Attaching to process 13343.
[Switching to process 13343 thread 0x2103]
I continue using the App and I only when I stop the execution do I get the following error message:
Thread one program received: SIGKILL
I think the issue is that another thread was opened when it requires user interaction from the uiwebview. And, then when I send the kill message the first thread receives the sigkill and complains with the error.
If I load the same view without the uiwebview, I don't get the error message at all.
And, when I use the 5.0 simulator I don't get this error message at all when loading the uiwebview.
I have seen similar behaviour with the uitextview.
Is this something I should be worried about? It doesn't seem to be a problem when running on the actual hardware.
Is there a way I can switch back to thread one after I push the other view and am done with the uiwebview?
SIGKILL is sent by the OS to any app to tell it to quit what it's running and remove its processes. SIGKILL is not an error on your part, and is not a simulator bug, it's what happens when you press the home button and kill the app in the multitasking drawer, or press the stop button on Xcode. So to reiterate, do not think its your fault, it's just the simulator freaking out sometimes. (Like once, I kept a device in debug mode and restarted my device and got like 300 lines of binary in the log, that was creepy!)
PS (though I HIGHLY doubt you are having this problem: SIGKILL may also be sent in cases where your app is using WAY too much memory, which would cause an exception or an EXC_BAD_ACCESS depending on how you managed to do it, but again, highly unlikely).