Activity Monitor show no processes With 10.13.  I using Item2 to compile golang (src/all.bash). When cpu is get 100% The Item2 can't response. I have already open Activity Monitor. But I can't force quit the Item2.  Then I quit Activity Monitor and start again.
This time it show nothing.  Other graphic app Chrome and Pycharm work fine.

And I can't open Item2 and Terminal too. 

I have Virtual Studio Code installed. And open it's "Integrated Termnial"(which I can have a zsh). I can pwd, But I can't ps and top (this mean it hang on don't return)

I can't open Dr Cleaner too. Something software related process monitor can work. 

I also notice when the Item2 is not response. I see a process take a huge virtual memory.

Another things: I try to use Activity Monitor's tool "Running System Diagnostics" but it is always in running status and can't stop.
Did you have htop open? You might be experiencing this issue https://github.com/hishamhm/htop/issues/682