Xcode 11 hangs while attaching debugger to ios process

Developer Tools & Services Xcode Graphical Debugger

Created Sep ’19

Replies 20

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When I attempt to launch an app from Xcode 11 (gm seed 2) to my attached iPhone running iOS 13 the I see the app launch with a white screen but then the iOS process hangs for about *60 seconds* before the app finishes launching. If I un-check "debug executable" on the target then this behavior does not happen. If I launch the app on the phone directly (without xcode) it launches normally. If I launch the app on the phone and attempt to attach the debugger from xcode I get the same (one minute) hang.

This only happens on one of my machines even though both are using the same setup (only diff is that one is a laptop and one is a desktop). So I am assuming something is wrong or corrupted with the "debug support" that was installed on first connect to the new xcode... But I can find no reference to how to re-init that. I have tried the "unpair phone" option in devices in xcode but it does nothing. I don't see anything in settings related to developer profiles or debug symbols.

Anything I can do to reset the phone with respect to debgging support / symbols installed by xcode? Any other thoughts?

thanks,

Pat

Boost

multitudes OP

Nov ’21

I updated to Xcode 13.2 beta and I have this issue as well (macOS 11.5). Tried everything without success!

kode54 OP

Jul ’22

I have this issue randomly with Xcode 13.4.1 under macOS 12.4 on Apple Silicon, debugging a Mac app, not Rosetta. Breaking the app shows the main thread is stuck in a function called uniquing_table_stack_retain, underneath of an NSWindow function. The rest of the app is non-responsive. The only thing I've found to fix it is to completely terminate the debug session and hope the next one doesn't get stuck.

I should mention that my hangups mostly happen when debugging with full Guard Malloc and Malloc Scribble enabled for the run, which also has a huge impact on memory usage and allocation overhead, both used memory and time to allocate.

sprenger_s OP

Sep ’22

Well I have also this problem since Xcode 13.4.1 and WatchOS 8.7. Immediately when the Debugger reaches a breakpoint the lldb-rpc server crashes. Your workaround is not working, so I Hope that Xcode 14 will fix this problem

guidove OP

Feb ’24

I'm on XCode 15.2, and it's also hanging while attaching the debugger.

It seems to happen sometimes (not all the time) when I switch between a wireless connection and a wired connection between XCode and my device. Probably when I lose my patience and plug in the cable while XCode is building/installing to the device.

The above steps alone did not work for me. I found that I also needed to shut down and restart my iPhone. So, here's what I do when this happens:

Close Xcode
Delete ˜/Library/Developer/Xcode/Derived Data
Delete ˜/Library/Developer/Xcode/iOS Device Support (note that I'm not deleting entire Xcode directory as that also deletes your archives)
Shut down Mac
Shut down iPhone
Restart iPhone
Restart Mac

Some of these steps are probably unnecessary, but as this doesn't happen too frequently for me, I just follow this to be on the "safe" side.

Dan321 OP

Apr ’24

are you supposed to delete all folders in ~/Library/Developer/Xcode/iOS DeviceSupport/?

I have 4 iphone folder names.