oh nice - reminds me of DDD(1) DDD was like magic first time I saw it. Oh wow - DDD is still maintained ?? :-D
1 https://en.wikipedia.org/wiki/Data_Display_Debugger
2 https://www.gnu.org/software/ddd/
I always liked the concept with DDD, but I could never keep it from crashing more than the program I was trying to fix.