#3812: segfault in maybePerformBlockedException
-------------------------------+--------------------------------------------
Reporter: duncan | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Runtime System | Version: 6.12.1
Keywords: | Difficulty:
Os: Solaris | Testcase:
Architecture: sparc | Failure: Building GHC failed
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On the 6.12 stable branch on Sparc Solaris, the buildbot reports that
stage2 segfaults.
Using GDB on the core file gives us this backtrace
{{{
#0 0x02421dfc in maybePerformBlockedException ()
#1 0x023fba60 in threadPaused ()
#2 0x02412a50 in stg_returnToSched ()
#3 0x02412a50 in stg_returnToSched ()
}}}
The same is not happening on the 6.13 head branch. There stage2 works ok.
In addition the 6.12.1 release works ok.
The `rts/RaiseAsync.c` file containing `maybePerformBlockedException` is
currently identical between the stable and head branches.
Sadly, relinking stage2 with -debug does not shed any light on things. We
get a segfault with a different backtrace
{{{
#0 0x02399580 in integer_cmm_int2Integerzh ()
#1 0x02397984 in sJ9_info ()
#2 0x02397984 in sJ9_info ()
}}}
Of course since this is a cmm function there is no symbolic debug info.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3812>
GHC <http://www.haskell.org/ghc/>
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