Impossible to use app while debugging with LLDB - Sigabort

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1

Hi Everyone!

My topic seems to be almost the same that this one: Lldb调试问题，没有操作自己报错 but since it’s not English written I can’t read it ^^ !

Problem :

  • I’m using an iPhone 6 running on iOS 9.3.x
  • I prepared lldb debug server as explain in iOSRE book
  • as you can see on the screen capture below, I attach the server to WhatsApp. Continue without setting any breakpoint. And finally the app got killed itself without reason.

Do you have any idea to help me ?

Thanks guys :slight_smile:

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4

anti debugging it seems
99% of the time it’s sysctl ptrace and their variations

Try https://github.com/AloneMonkey/AntiAntiDebug

After the app is killed you can type bt and use the stack backtrace to locate the portion of code that initialized the anti-debugging mechanism

5

Hey @Zhang, thanks for your fast answer.

I’ve cloned your repo and installed the tweak file as I usually do.
It does not seems to change something. What should this tweak do?

I can not use bt after the app is killed. However I can use it just before, when a breakpoint is set (see screenshot below).

I don’t know if I did something wrong or misunderstood something. Could you give me more info?

I really appreciate your help,
thanks again !

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6

Hey @Zhang,

I’ve reinstalled my tweak and you tweak just to be sure and now it seems to work like a charm!

Thanks again!

I hope it’ll continue to work now! :slight_smile:

[SOLVED]