[GHC] #9003: GHC eventlog: thread stop status codes modified (breaking ghc-events, threadscope, edentv)

[GHC]

#9003: GHC eventlog: thread stop status codes modified (breaking ghc-events,
threadscope, edentv)
-------------------------------+-------------------------------------------
        Reporter:  jberthold   |            Owner:  ezyang
            Type:  bug         |           Status:  merge
        Priority:  high        |        Milestone:  7.8.3
       Component:  Runtime     |          Version:  7.8.2
  System                       |         Keywords:
      Resolution:              |     Architecture:  Unknown/Multiple
Operating System:              |       Difficulty:  Easy (less than 1 hour)
  Unknown/Multiple             |       Blocked By:
 Type of failure:  Other       |  Related Tickets:
       Test Case:              |
        Blocking:              |
-------------------------------+-------------------------------------------

Comment (by jberthold):

 I would prefer if the patch included a change to some event (eventlog
 header), so that the 7.8.2 version can be recognized by reading the
 header.
 This is the best way to fix ghc-events.

 The event EVENT_USER_MARKER was new in 7.8, and my fix to ghc-events-
 parallel was based on this. If the old numbering is restored now, I would
 like to have a way to distinguish version 7.8.3 from 7.8.2, which is
 easily done by changing events (could be adding an event which is not
 used, or extending an event with a new field).
 If any such change is pending, I suggest to apply it now, or revert the
 numbering later.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9003#comment:12>
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