Rahul Kapoor wrote:
I've made a speculative fix. If you're able to test it, that would be very
helpful:
http://hackage.haskell.org/trac/ghc/ticket/2063
Cheers,
Simon
I had no luck installing the binary snapshot (libedit problems, which I worked
around by creating a link to the version I had) after which I started get libc
version problems so I gave up on that built the HEAD snapshot from source.
running ghci in-place now gives:
GHCi, version 6.11.20081117: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
ghc: internal error: loadObj: failed to mmap() memory below 2Gb; asked
for 57344 bytes at 0x0x4009fa00, got 0x0x7f3a9b2b8000. Try specifying
an address with +RTS -xm<addr> -RTS
(GHC version 6.11.20081117 for x86_64_unknown_linux)
I am not really sure what I <addr> for -xm should be.
Ok, so we got a bit further, but it looks like at some point mmap() stopped
giving us memory where we wanted it, perhaps because something else was
already mapped at that address.
It would be useful to get a look at the memory map. Can you load up GHCi
in gdb, as follows. First, find out the path to your GHC binary and the -B
option it needs:
$ cat `which ghc`
#!/bin/sh
exec /home/simonmar/fp/lib/x86_64-unknown-linux/ghc-6.10.1/ghc
-B/home/simonmar/fp/lib/x86_64-unknown-linux/ghc-6.10.1/. -dynload wrapped
${1+"$@"}
Here, /home/simonmar/fp/lib/x86_64-unknown-linux/ghc-6.10.1/ghc is my GHC
binary, and -B/home/simonmar/fp/lib/x86_64-unknown-linux/ghc-6.10.1/. is
the option I need to pass. Now start gdb:
$ gdb /home/simonmar/fp/lib/x86_64-unknown-linux/ghc-6.10.1/ghc
and run GHC:
(gdb) run --interactive
-B/home/simonmar/fp/lib/x86_64-unknown-linux/ghc-6.10.1/.
It will now crash with the error you saw above. At this point we need to
look at the memory map. Find the PID of the GHC process, by running 'ps
uxw' in a terminal (don't quit gdb). Then
$ cat /proc/<pid>/maps
where <pid> is the PID of the GHC process running in gdb, and send me the
output.
Cheers,
Simon
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