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I wrote this: https://ja.nsommer.dk/articles/x86-debugger-for-windows-and-...

It's a debugger for Windows (and Wine), like the one in the article, written in C. It uses software breakpoints (infinite breakpoints)

I really liked https://blog.tartanllama.xyz/writing-a-linux-debugger-setup/

I learned a lot.

I was asking this myself this while reading the book "Crafting Interpreters". I posted a few resources I found on an issue about implementing debuggers [1] -- although honestly I still haven't gotten down to read all of them (or to implement a debugger! :-/).

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1: https://github.com/munificent/craftinginterpreters/issues/92...

Besides breakpoints, any ideas on inspecting the value of a variable in each step, figuring out what variables are in scope, for the case of an interpreter?

I’m guessing you’ll have to work with the scopes in the resolver:

https://github.com/munificent/craftinginterpreters/blob/mast...

Ooh, thanks for this! :)

Not what you asked for, but if that's your interest you'll probably appreciate https://justine.lol/blinkenlights/

Take a look heere: https://eli.thegreenplace.net/tag/debuggers It was eye-opening for me.

How about a book?

I like "Advanced Windows Debugging" by Mario Hewardt and Daniel Pravat.