[GHC] #7753: Profiling report broken with foreign exported functions

[GHC]

#7753: Profiling report broken with foreign exported functions
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        Reporter:  akio          |            Owner:
            Type:  bug           |           Status:  new
        Priority:  normal        |        Milestone:  7.8.1
       Component:  Profiling     |          Version:  7.6.2
      Resolution:                |         Keywords:
Operating System:  Linux         |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |       Difficulty:  Unknown
       Test Case:                |       Blocked By:
        Blocking:                |  Related Tickets:
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Comment (by akio):

 I think I know what is happening. The {{{wrapper}}} and {{{f}}} cost
 centres are actually placed under {{{SYSTEM}}}. I can see it by using
 {{{+RTS -pa}}} instead of {{{+RTS -p}}}. However {{{SYSTEM}}} is a hidden
 cost centre, so by default it's not included in the report, resulting in a
 confusing call tree.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7753#comment:2>
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