I wrote an intro to Wine dev: https://www.codeweavers.com/blog/aeikum/2019/1/3/working-on-wine-part-1-the-wine-ecosystem https://www.codeweavers.com/blog/aeikum

I wrote an intro to Wine dev: https://www.codeweavers.com/blog/aeikum/2019/1/3/working-on-wine-part-1-the-wine-ecosystem https://www.codeweavers.com/blog/aeikum/2019/1/3/working-on-... It doesn't go into a lot of debugging detail, as that's its own huge topic, but may get you started. If you're debugging a thing in Proton, you'll want to use that project environment instead of Wine's directly, but the concepts are the same.