![]() Now, in development, a mobile developer could identify a Watchdog Termination by inspecting system logs. In a decently complex app, there could be thousands of function calls between the start of a background task and where the app crashes. This means the crash point is at least 30 seconds removed from the initiation point of the background task. And the termination is the last thing your app will process. ![]() To trigger a Watchdog Termination from a background task, you have to background your app and wait 30 seconds. ![]() #MAC SHUTDOWN WATCHDOG CODE#They don’t result from the app running a single line of code and then immediately throwing an exception.įar from it in fact. This stems from Watchdog Terminations happening at the “edges” of the app. One reason is that the termination may not show up in the crash report, and this happens fairly often.Īnother reason is that the crash report itself might not be easy to decipher. Why Watchdog Terminations are Difficult to DebugĪlthough Watchdog Terminations all have the same exception code, it’s not always easy for mobile developers to find these issues in their crash reporter. A common way mobile developers trigger Watchdog Terminations during background tasks and what they can do to prevent them.Why Watchdog Terminations are difficult to debug.In this post, we will go over two things: But they are in fact some of the most difficult bugs to solve. An app exceeding limits on background tasksĪ Watchdog Termination always has the exception code 0x8badf00d in the system log, so you might think it would be easy for mobile developers to find and debug these types of problems.An app doing synchronous networking on the main thread.An app using too much CPU, leading to the device overheating.A few examples where this could occur include: A Watchdog Termination on iOS occurs when the OS kills an app for violating rules regarding time or resource usage. ![]()
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