debugger frontend

[Baloff]

Hello

After a year, I am coming back to emacs, getting to remember all the 
commands and packages I used coding c++. One package I just can’t 
remember to activate which is a c++ code debugger, it added a watch 
window for all the variables I am stepping through, it was very 
flexible, I think it had gdb as its engine but I don’t seem to remember 
how to get it back. I know you are  not given much leads but this is all 
what I remember. I also have Cscope which is a code browser.
Any investigative guesses.

Thanks