[GHC] #14153: Change worker thread name to something mentioning original process name

[GHC]

#14153: Change worker thread name to something mentioning original process name
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        Reporter:  enolan            |                Owner:  enolan
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  phab:D4001
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"d07b8c7ae8bc22a7c36c96cb3fd800aecdde6eac/ghc" d07b8c7/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d07b8c7ae8bc22a7c36c96cb3fd800aecdde6eac"
 Include original process name in worker thread name (#14153)

 Prior to this commit, worker OS thread were renamed to "ghc_worker" when
 spawned. This was annoying when reading debugging messages that print
 the process name because it doesn't tell you *which* Haskell program is
 generating the message.

 This commit changes it to "original_process_name:w", truncating the
 original name to fit in the kernel buffer if neccesary.

 Test Plan: ./validate

 Reviewers: austin, bgamari, erikd, simonmar

 Reviewed By: bgamari

 Subscribers: Phyx, rwbarton, thomie

 Differential Revision: https://phabricator.haskell.org/D4001
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14153#comment:4>
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