#4131: Crash in messageBlackHole() on SPARC
------------------------+---------------------------------------------------
Reporter: benl | Owner:
Type: bug | Status: new
Priority: normal | Component: Runtime System
Version: 6.13 | Keywords:
Os: Solaris | Testcase:
Architecture: sparc | Failure: Runtime crash
------------------------+---------------------------------------------------
Compile the attached program on a SPARC T2:
{{{
b...@greyarea$ ghc -Odph Main.hs -threaded -rtsopts
}}}
Run with a large number of threads:
{{{
b...@greyarea$ ./Main 4000000 +RTS -N32
Generating test data.
Computing hull.
Bus Error (core dumped)
}}}
GDB says:
{{{
#0 0x01b55334 in messageBlackHole ()
#1 0x01b55834 in executeMessage ()
#2 0x01b2ade0 in schedule ()
#3 0x01b2b900 in scheduleWorker ()
#4 0xff1c4910 in _lwp_start () from /lib/libc.so.1
#5 0xff1c4910 in _lwp_start () from /lib/libc.so.1
}}}
This is compiled against vector-0.7 and primitive-0.3.1. I'm not using
unsafe vector functions. It crashes about 50% of the time with the given
arguments. With a lower number of points (like 1000000) and less threads
it still crashes but not as reliably. It always crashes in
`messageBlackHole()`. Disabling the parallel GC with -qg doesn't help, nor
does running with -H1000M. It runs fine on x86/OSX.
This patch:
{{{
Thu Jun 10 01:06:36 PDT 2010 Simon Marlow <[email protected]>
* messageBlackHole: fix deadlock bug caused by a missing 'volatile'
}}}
didn't help, so it could be unrelated.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4131>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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