Graal's native-image tool also does a form of this. The compiler actually executes parts of your program at compile time, but it's real execution so you can the

Graal's native-image tool also does a form of this. The compiler actually executes parts of your program at compile time, but it's real execution so you can theoretically do anything. The heap data that's generated is then persisted into the program. You can debug such code just like normal code by just running it on HotSpot instead.