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  "title" : "EXC_CRASH (SIGKILL)"
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# EXC_CRASH (SIGKILL)

The operating system terminated the process,
often because a background task violated a requirement,
device resources were limited,
or the user force quit the app.

## Discussion

The crash report contains a `Termination Reason` field with a code that explains the
reason for the crash. In the following example, that code is `0xdead10cc`:

```other
Exception Type:  EXC_CRASH (SIGKILL)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Termination Reason: Namespace RUNNINGBOARD, Code 0xdead10cc
```

The `Termination Reason` code is one of the following values:

- `0x2182bad2` (`562215634`):
  The operating system terminated the app due
  to a background task failing to complete in time.
- `0x2182bad3` (`562215635`):
  The operating system terminated the app due
  to a background URL session failing to complete in time.
- `0x2182bad4` (`562215636`):
  The operating system terminated the app due
  to a background fetch failing to complete in time.
- `0x8badf00d` (`2343432205`) — pronounced “ate bad food”:
  The operating system’s watchdog terminated
  the app. See [Addressing watchdog terminations](/documentation/Xcode/addressing-watchdog-terminations).
- `0xc00010ff` (`3221229823`) — pronounced “cool off”:
  The operating system terminated the app due
  to a thermal event. This can be an issue with the particular device that this crash
  occurred on, or the environment it operated in. For tips on making your app run more
  efficiently, watch the [iOS Performance and Power Optimization with Instruments](https://developer.apple.com/videos/play/wwdc2011/312/)
  WWDC session. To test your app’s response to thermal events, enable
  a thermal device condition as described in [Test under adverse device conditions (iOS)](https://help.apple.com/xcode/mac/current/#/dev308429d42).
- `0xdead10cc` (`3735883980`) — pronounced “dead lock”:
  The operating system terminated the app
  because it held on to a file lock or SQLite database lock during suspension. Request
  additional background execution time on the main thread with <doc://com.apple.documentation/documentation/UIKit/UIApplication/beginBackgroundTask(withName:expirationHandler:)>.
  Make this request well before starting to write to the file in order to complete
  those operations and relinquish the lock before the app suspends. In an app extension,
  use <doc://com.apple.documentation/documentation/Foundation/ProcessInfo/beginActivity(options:reason:)>
  to manage this work.
- `0xbaadca11` (`3131951633`) — pronounced “bad call”:
  The operating system terminated the app for
  failing to report a <doc://com.apple.documentation/documentation/CallKit> call in
  response to a <doc://com.apple.documentation/documentation/PushKit> notification.
- `0xbad22222` (`3134333474`):
  The operating system terminated a VoIP application because it resumed
  too frequently.
- `0xbaddd15c` (`3135099228`) — pronounced “bad disc”:
  The operating system terminated the app to
  delete caches, in an attempt to reclaim disk space. Many factors contribute to low disk
  space. You may be able to help by minimizing what you write to disk and managing the
  entire life cycle of your files.
- `0xc51bad01` (`3306925313`):
  watchOS terminated the app because it used too much CPU time while
  performing a background task. Optimize the code performing the background task to
  be more CPU efficient, or decrease the amount of work that the app performs while
  running in the background to resolve this crash.
- `0xc51bad02` (`3306925314`):
  watchOS terminated the app because it failed to complete a background
  task within the allocated time. Decrease the amount of work that the app performs
  while running in the background to resolve this crash.
- `0xc51bad03` (`3306925315`):
  watchOS terminated the app because it failed to complete a background
  task within the allocated time, but the system was sufficiently busy overall that
  the app might not have received much CPU time to perform the background task. Although
  you might be able to avoid the issue by reducing the amount of work your app performs
  in background tasks, `0xc51bad03` doesn’t indicate that the app did anything wrong.
  More likely, the app wasn’t able to complete its work because of overall system load.
- `0xd00d2bad` (`3490524077`) — pronounced “dude, too bad”:
  The operating system terminated the app due to excessive use of key system
  resources. You might be able to avoid the issue by reducing parallelization and
  ensuring that your app completes operations for preceding tasks before starting
  new tasks.

---

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