[GHC] #13084: 'foreign import prim' are marked PlaySafe by the parser

[GHC]

#13084: 'foreign import prim' are marked PlaySafe by the parser
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        Reporter:  jberryman         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I think that's a good question.

 Neither the
 [https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/ffi-
 chap.html user manual section] nor the [wiki:Commentary/PrimOps wiki
 commentary] discuss the interaction of `foreign import prim` with GC.

 Indeed my assumption would have been that `foreign import prim` was by-
 default unsafe, i.e. should not trigger gc.

 I'd have thought it made sense to allow a safe/unsafe attribute on
 `foreign import prim`.

 Simon M: any thoughts?

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13084#comment:1>
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