Help/Support lldb live tracing an app, or an alternative?

[infernusdoleo 0 9]

In my continuing quest to figure out how this app works (so I can dismantle the hell out of it) I've found myself against a wall and need some more advice.

 

I need to figure out where the program goes when a button is pressed. I thought I had it figured out based on snooping the HTTPS traffic, but after a day of coding, it seems the HTTPS traffic happens AFTER what I'm trying to see happens.

 

So here's my problem.

 

I press a button. Shit happens. The stuff I know to break on is after the button press, but before the known breakpoints.

 

Without being able to live trace the execution, I cannot break the program at the right spot. It's a sub_x program so I have no clue which function to break on without seeing it happen. The problem is if I break on the function that happens after - it's not in the stack. There's a loop, which if I break on it, keeps stopping. But it's a HUGE function. What I'm looking for happens in that function, but it's before something that happens later - it descends into it, does what I need to see, returns back out, moves forward, then descends into what I can break on. That clears that other function from the stack.

 

Is there any way to live trace with lldb? I have access to every platform now - Windows, OS X, linux, iOS directly on the device.

 

Wish I could interrupt the process, press the button on the screen, then 's'tep into the function, but that doesn't work. Process needs to be running to pick up my click. But if it's running, it steps through the process too fast.

 

And the function that loops checking for the click is enormous - to manually check every subroutine would take a week.

 

Anyone? Any clue? Thanks.

[Dannyyy 2.6k iPhone 7 Plus 12.1.2]

[rjd3 657 iPhone 6 10.3.2]

Shit bro, wish i knew, thats alittle to advanced for me... Goodluck

[Guest]

Tracepoints maybe? I've never worked with HTTPS traffic before

 

I don't know what the tracepoint command for LLDB is though

[imp0ss1ble 714 24 9.0.2]

maybe set a breakpoint on $PC... I dunno

[Zork 20]

"if I break on the function that happens after - it's not in the stack. There's a loop, which if I break on it, keeps stopping. But it's a HUGE function. What I'm looking for happens in that function, but it's before something that happens later - it descends into it"

sounds like a riddle

[imp0ss1ble 714 24 9.0.2]

before or after the loop?

[Zork 20]

Don't know the app but is it "possible" that there is a lua function

Script engines are you friend