[GHC] #13529: eventlog to report more information about stopping threads because of FFI calls

[GHC]

#13529: eventlog to report more information about stopping threads because of FFI
calls
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        Reporter:  varosi           |                Owner:  (none)
            Type:  feature request  |               Status:  new
        Priority:  normal           |            Milestone:
       Component:  Profiling        |              Version:  8.0.2
      Resolution:                   |             Keywords:
Operating System:  Windows          |         Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown     |            Test Case:
      Blocked By:                   |             Blocking:
 Related Tickets:                   |  Differential Rev(s):
       Wiki Page:                   |
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Comment (by bgamari):

 I don't think we need to bring LLVM into this. It's just a question of how
 we want to insert tracing output. Doing this in STG to Cmm would be one
 option.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13529#comment:5>
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