fbsamples/ghc-hotswap

Example code for how we swap compiled code within a running Haskell process.

ghc-hotswap's Issues

Reload object by same path failed

When I try to reload shared object by same path as an old one, I got error:

$ cabal run /tmp/1.so
...normal app output...
Next SO to use: /tmp/1.so
ghc-hotswap-demo: ^^ Could not load 'hs_soHandles', dependency unresolved. See top entry above.

I think that the reason is unloading old object after loading a new object. I've made a PR #2 for fix this issue. It works but I don't know maybe it may broke some internal logic or so. I'm not a real haskeller.:)

Is Windows supported?

This sample works great when using Linux. On windows, however, the sample either produces the wrong output or crashes with an access violation. The much longer compile times aside, is Windows principally not supported in this case?

There are some simple examples that work, like providing values of type Int, Int -> Int, Maybe Int, String -> IO String. Just String or Text immediately gives access violations.

Compatibility with only Stack?

I can't seem to pass a flag to cabal or find an equivalent to "enable-library-for-ghci" in the stack options. I'm getting a "not a relocatable object (.o) file" error.

Was wondering if you know a way around this?

Hackage release

Is there a reason the core hotswap stuff here hasn't had a hackage release? I get it's semi-demo code, but it seems to be the only open-source code around to do stuff these days, and it would be nice if the GHC.Hotswap library was directly cabal-installable.