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I have an application which is dealing with many data structures, uiimageviews, videos, creating bit map context and so on. Every time the application is crashing on its continuous usage for a long time. The application is crashing with the memory warning --> Application exited abnormally with signal 9. What may be its reason. What does signal 9 means.

Priyanka V
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  • I have the same problem, but it's occurring only after I sent an update to the AppStore..?!? if I install the same app with an ad hoc certificate it works fine. Anyone knows why? – Alberto M Jul 05 '12 at 10:37
  • There is some discussion currently going on about the App Store delivering corrupting binaries. Unfortunately my app experienced the same issue. Thanks Apple. – BP. Jul 05 '12 at 16:30
  • I was getting **Message from debugger: Terminated due to signal 9** whenever I started recording from instruments. It basically killed any runs directly done from Xcode. – mfaani Aug 11 '17 at 12:50

3 Answers3

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I think this is due to the memory issue. Your app is using lot of memory due that is app is killed..

PgmFreek
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  • It is due to memory issue. but signal 9 means what type of memory issue. It may be due to data structures, uiimageview or what it is. – Priyanka V May 11 '11 at 05:01
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    Signal number 9 is [SIGKILL](http://en.wikipedia.org/wiki/SIGKILL). It means your application is being terminated immediately, without any chance to clean up or catch and handle the signal. – jscs May 11 '11 at 19:37
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Check out this posting

http://lists.apple.com/archives/xcode-users/2011/Mar/msg00837.html

It sounds like it might be related.

drekka
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3

It can also be a privacy/permission issue. We forgot to add NSCameraUsageDescription and UILaunchStoryboardName to Info.plist file and our app crashed with error Message from debugger: Terminated due to signal 9

After adding the following lines to Info.plist the app sopped crashing.

<key>NSCameraUsageDescription</key>
<string>The app would like to let you make a picture.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>The app would like to let you choose an item from your Photos.</string>

Terminated due to signal 9.

Sei Flavius
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