Hi. I'm working with GHC 6.10.4 on Solaris. I'm new at Haskell and have inherited a rather large and complex program to maintain and modify. I'd like to get a listing of everything - every single step - that's done in a run of the program. Something similar to the output of the :step command, but I'd like the entire run (which would involve tens of thousands of steps). Is there a way to just do this - have it run and print everything it does to the screen?
I've tried doing the following, after starting a "script" to capture all of the screen output...
ghci -fglasgow-exts parsequery.hs
:break 36
main
which takes me to this prompt...
Loading package mtl-1.1.0.2 ... linking ... done.
Stopped at lesearch.hs:36:13-39
_result :: IO SearchState = _
input :: [String] = _
st :: SearchState = _
[lesearch.hs:36:13-39] *Main>
This takes me to the call before the one that I want to output each step of so that I can then manually, with hardcopy, read it and get an idea of what happened.
So I start a step through the next call.
[lesearch.hs:36:13-39] *Main> :step process_query_loop st input
Stopped at lesearch.hs:(46,0)-(69,39)
_result :: IO SearchState = _
... [lesearch.hs:(46,0)-(69,39)] *Main>
So far so good. This is what I want to see - a listing like this for every (interpreted of course) line of haskell code that runs, all the way to the end. Since this is a very large program, at this point I started pasting this to the terminal - 4 steps at a time...
:step
:step
:step
:step
This gave me the listing I wanted. But after a certain point, it inevitably fails with a core dump, and what I capture from the screen is garbled up to that point anyway. I'm hoping there's a simpler way to do this. Thanks for taking the time to read this.
Ralph