CCS/UCD3138PFCEVM-026: i_target_offset

It sounds like you may not know how to use the memory debugger to look at variables.  If you look at the PFC code, you will see a directory just below the main code directory where the source code is with a device name.  If you look at the memory debugger on the upper left corner, you will see the word "File"  if you click on that, you can select the directory I mentioned, and the memory debugger will use it to get the variables, so that you can examine the variables directly.   

I would suggest that you do the video training that TI provides on the web.  It will help with with lots of the things you are asking questions about:

https://training.ti.com/jp/ucd3138-digital-power-training-series