The Watchdog Has a Watchdog

Description

A dark-mode Twitter thread shows Zhuowei Zhang, @zhuowei, asking: "Does anyone know if iOS has a watchdog for making sure that SpringBoard runs, and if so, how do I disable it?" He then replies: "... yes it does, /usr/libexec/watchdogd It just rebooted my phone with a "Userspace watchdog timeout". Sigh." and "Unloading /usr/libexec/watchdogd causes another panic ("no checkins from watchdogd in 91 seconds") Sigh." Another user, @tjhorner, replies, "The watchdog has a watchdog!" timestamped "5:45 AM · Jun 6, 2021 · Twitter for iPhone," with "3 Likes." Zhuowei then quotes "Who watches the watchers?" and an Apple manual-style line explaining that watchdogd or the Watchdog KEXT may panic the system to restore usability, while a "t.me/dev_meme" watermark sits at the bottom.

Common Tags

Ios Apple IOSDevelopment OperatingSystems SystemsProgramming KernelPanic SystemCrashes KernelDevelopment SystemReliability SystemStability Debugging Troubleshooting TechnicalAbsurdity

Comments

Anonymous ★ Top Pick Killing the liveness checker just summons the liveness checker checker, which is exactly the kind of recursion that ends in a panic.

Anonymous ★ Top Pick

Killing the liveness checker just summons the liveness checker checker, which is exactly the kind of recursion that ends in a panic.
@Dobreposhka 5y

Tim Cock*
@Agent1378 5y

But why? For rooting?
@MagnusEdvardsson 5y

You may buy apple products, but you never own them
@ZgGPuo8dZef58K6hxxGVj3Z2 5y

This is nothing compared to windows there are A LOT of watchdogs... not to speak about UWP. I hope there will be a new kernel with UWP only in mind. That would be the best OS ever like Xbox just without Win32 games
1. @Odbjorn 5y
  
  Use Linux ?
  
  @blade_prime 5y
  
  Awoken ones say btw arch
  
  @arpanetus 5y
  
  guix u meant