The Call Stack View shows the backtrace of the thread that is currently in focus and stopped, i.e. the Thread of Interest or TOI, bolded in the Process and Thread View:
To view the backtrace from a different thread, make a new thread selection in the Process and Thread View.
Note that the Call Stack displays the language and name of the program or function in focus:
The Information tab on the Call Stack displays additional detail about the location of the stopped thread and the selected frame.
The info panel displays which function the selected stack frame is in, the source file containing that function, the line number where the PC is, and the Frame Pointer (FP) for the selected frame.
on the Call Stack displays additional detail about the location of the stopped thread and the selected frame.