How to debug into a forked chain's contract code while running forge test? I do have source code

[sdajklfw389]

I forked an blockchain locally by using vm.createSelectFork. And used forge test --debug to get into the call inside forked contracts.

Basically my test calls different functions on different contracts.

But the problem is: I can debug my test code by solidity code, but i can only step into bytecode of the on-chain contracts.

I do have the source code of the forked contracts and compiled them with the same compiler version/optimizer exactly as the onchain contracts, and I also verified the local runtime bytecode is the same as onchain.

And I have compiled the production code(on-chain contracts) together with my test code. Although my test code only need the interfaces of production code. Not the implementation code.