#5899: RTS crash w/ strange closure type 603975781 on OS X 10.8
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Reporter: dylukes | Owner:
Type: bug | Status: new
Priority: high | Milestone:
7.4.2
Component: Runtime System | Version:
7.4.1
Keywords: rts, strange closure, internal error, os x | Os:
MacOS X
Architecture: x86_64 (amd64) | Failure:
Runtime crash
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonmar):
I managed to reproduce the problem. I know what's going on, but I don't
know how to fix it yet. So the problem is that in the binary, the linker
has re-ordered some of the contents so that one particular info table is
not next to its code any more:
{{{
000000010002cb88 t
_base_GHCziIOziHandleziInternals_augmentIOError_info_dsp
000000010002cba0 T _base_GHCziIOziHandleziInternals_augmentIOError_info
000000010002cbe8 t _base_GHCziEventziInternal_evtNothing_info_dsp
000000010002cbf8 T _base_GHCziEventziInternal_evtNothing_info
000000010002cc88 t _base_GHCziBase_zd_info_dsp
000000010002cca0 t _base_GHCziIOziHandleziInternals_zdLr3Qxlvl8_info_dsp
000000010002ccb0 T _base_GHCziIOziHandleziInternals_zdLr3Qxlvl8_info
000000010002cd38 T _base_GHCziBase_zd_info
}}}
Note the symbol `_base_GHCziBase_zd_info_dsp` should be adjacent to
`_base_GHCziBase_zd_info`, but the linker has placed some other stuff in
between. These _dsp symbols are already special OS X magic that we insert
to prevent the linker dropping things on the floor (IIRC, and this is
horrible because it means the libraries on OS X have twice as many symbols
as other platforms).
These symbols are adjacent in the original object file:
{{{
libHSbase-4.5.0.0.a(Base__45.o):
0000000000000028 D _base_GHCziBase_zd_closure
0000000000000018 T _base_GHCziBase_zd_info
0000000000000000 t _base_GHCziBase_zd_info_dsp
U _stg_ap_p_fast
}}}
it seems like there ought to be a way to disable this behaviour with a
linker flag, but I can't find one that works. I've tried
`-no_order_inits` and `-no_order_data`.
Help from OS X experts greatly appreciated...
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5899#comment:17>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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