Question about indirectees of BLACKHOLE closures

[Ömer Sinan Ağacan]

I still don't understand the whole story with blackholes but I'll
update the comments around the BLACKHOLE stack frame and/or wiki pages
once I get a better understanding.

Ömer


2018-03-26 21:47 GMT+03:00 Ben Gamari <ben at smart-cactus.org>:
> Simon Marlow <marlowsd at gmail.com> writes:
>
>> The raise closure is declared to be a THUNK:
>>
>> https://phabricator.haskell.org/diffusion/GHC/browse/master/rts/Exception.cmm;60e29dc2611f5c1a01cfd9a870841927847a7b74$424
>>
>> Another example of this is when an asynchronous exception is thrown, and we
>> update all the thunks/BLACKHOLEs pointed to by the update frames to point
>> to new thunks (actually AP_STACK closures) representing the frozen state of
>> evaluation of those thunks.  For this, see rts/RaiseAsync.c.
>>
> This thread has answered a number of interesting questions. It would be
> a shame if these answers vanished into the abyss of the ghc-devs
> archives.
>
> Omer, do you think you could make sure that the discussion here is
> summarized in a Note (or ensure that the relevant notes reference one
> another, if they already exist)?
>
> Cheers,
>
>  - Ben
>