Markus Barenhoff wrote:
On Fri 28.11 09:42, Simon Marlow wrote:
Markus Barenhoff wrote:
On Thu 27.11 09:49, Simon Marlow wrote:
Hi!
I checked out and translated the head version of ghc today from darcs.
It compiled fine. When I now try to start the ghci I get the following:
---- snip ----
GHCi, version 6.11.20081126: http://www.haskell.org/ghc/ :? for help
ghc: internal error: loadObj: failed to mmap() memory below 2Gb; asked for
626688 bytes at 0x40000000, got 0x801635000. Try specifying an address
with +RTS -xm<addr> -RTS
(GHC version 6.11.20081126 for x86_64_unknown_freebsd)
Please report this as a GHC bug:
http://www.haskell.org/ghc/reportabug
Abort (core dumped)
---- snip ----
If it helps somehow, you can find the core dump here:
http://www.alios.org/~alios/ghc.core.bz2
That's odd, because 6.8.3 is using 0x40000000 on FreeBSD and is working
fine (or is it?).
yes, it worked, but I haven't installed anymore - so I'am not sure, where it
does maps its stuff into memory.
The memory map shows that there's nothing mapped in at the place we're
asking for memory, but still FreeBSD decides to give us memory somewhere
else. I checked back in 6.8.3 and it looks like we were using MAP_FIXED -
now MAP_FIXED is dangerous, because it will overwrite existing mappings
(like the binary itself!), which is why we're not doing that now.
I've committed a patch that uses MAP_FIXED on FreeBSD if other attempts to
get memory below 2Gb fail. I'd be grateful if you could test it out, the
patch is this one, pushed to HEAD today:
Wed Dec 10 11:57:51 GMT 2008 Simon Marlow <[EMAIL PROTECTED]>
* On FreeBSD, try MAP_FIXED if ordinary mmap() fails to give us suitable
memory
This appears to be necessary on FreeBSD. It might be necessary on
other OSs too, but I'm being cautious because using MAP_FIXED can lead
to crashes by overwriting existing mappings, and we have no (easy) way
to prevent that.
Cheers,
Simon
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