[GHC] #12019: Profiling option -hb is not thread safe

[GHC]

#12019: Profiling option -hb is not thread safe
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        Reporter:  erikd             |                Owner:  erikd
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Runtime System    |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11978, #12009    |  Differential Rev(s):  Phab:D2516
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"6555c6bb8447ed65d5da4bab462ee9da7dc3f97a/ghc"
 6555c6bb/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6555c6bb8447ed65d5da4bab462ee9da7dc3f97a"
 rts: Disable -hb with multiple capabilities

 Biographical profiling is not thread-safe as documented in #12019. Throw
 an error when it is used in this way.

 Test Plan: Validate

 Reviewers: simonmar, austin, erikd

 Reviewed By: erikd

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2516

 GHC Trac Issues: #12019
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12019#comment:6>
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