When I double click one record in Call Tree, I can locate the source code. But just for Simulator, shows Unavailable for iPhone device testing.
Is this function just for Simulator? Or need some extra settings for iPhone device testing?
Simulator:

iPhone Device:

I can only click top left infos to show this window, and find the code by myself. And Source Location info is too long to show, I need Copy Selected Frames and paste it to a text editor to see the full source location info.

Xcode Version 8.3.2 (8E2002)
iPhone Device iOS version 10.3.2(14F89)