Have you tried the -xc flag yet? If you do a profiling build and then run your program with +RTS -xc it will give a stack trace on exceptions. (I think your idea still has some content but ^ is easier because it already exists!) On 12/12/21 2:01 PM, Daneel Yaitskov wrote:
Hi,
I would like to enable stack traces at launch time and run program without HasCallStack overhead by default. I've got an idea to use GHC plugin which would duplicate all functions in modules with specified prefix. Duplicated functions should get disambiguating prefix (e.g. "debug") and HasCallStack constraint. Bodies of prefixed functions should be rewritten to use prefixed functions from matching modules (should be easy to do - hook just after renaming GHC phase when all names are fully qualified?).
This way main function could choose "runLib" or "debugRunLib".
Did anybody make something similar?
--
Best regards, Daniil Iaitskov
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