[GHC] #8039: RTS linker: unloadObj() does not actually unload the code

[GHC]

#8039: RTS linker: unloadObj() does not actually unload the code
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        Reporter:  simonmar           |            Owner:  simonmar
            Type:  task               |           Status:  closed
        Priority:  high               |        Milestone:  7.8.1
       Component:  Runtime System     |          Version:  7.6.3
      Resolution:  fixed              |         Keywords:
Operating System:  Unknown/Multiple   |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown       |       Difficulty:  Unknown
       Test Case:  rts/linker_unload  |       Blocked By:
        Blocking:                     |  Related Tickets:
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Comment (by heisenbug):

 Replying to [comment:16 simonmar]:
 > The big missing piece with unloading of .so's is knowing their
 boundaries in memory

 [http://eli.thegreenplace.net/2011/08/25/load-time-relocation-of-shared-
 libraries Eli Bendersky's article] suggests to use the
 [http://linux.die.net/man/3/dl_iterate_phdr dl_iterate_phdr] function for
 finding information about loaded libraries. Seems to be linux only. There
 is a [http://stackoverflow.com/questions/10009043/dl-iterate-phdr-
 equivalent-on-mac workaround on OSX], though, on !StackOverflow.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8039#comment:17>
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