Unregistered build (was Re: AMD64)

[Peter Robinson]

On Thursday 17 June 2004 17:38, Simon Marlow wrote:
> It looks like registerised compilation on x86_64 isn't quite working
> yet, then.  If you're up to debugging this, then I suggest you start
> from a simpler program - try hello world registerised, and then slightly
> larger programs if that works.>
> Compile programs with -debug, and run with gdb to find out where the
> crash is happening.
I would if I could, but unfortunately I can't even start ghc (the strace log 
I've attached before was created when running ghc without  _any_  arguments):
# ./ghc
# Segmentation fault

By the way, the unregistered ghc does not build all programs I've tried. 
This was the result of trying a more complex one:
# ghc-inplace --make Main.hs
# Chasing modules from: Main.hs
# ghc-6.2.20040613: internal error: getMBlock: mmap: Invalid argument

Some other ones can be compiled but cannot be executed (like ghc). All crashes 
are related to memory management:

#../log:mmap(0x2a96300000, 1048576, PROT_READ|PROT_WRITE|PROT_EXEC, 
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a96300000
#../log:mmap(0x2a96400000, 1048576, PROT_READ|PROT_WRITE|PROT_EXEC, 
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a96400000
#../log:mmap(0x2a96500000, 30739081986048, PROT_READ|PROT_WRITE|PROT_EXEC, 
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 EINVAL (Invalid argument)
#../log:write(2, "getMBlock: mmap: Invalid argumen"..., 33) = 33

Here's another trace of a different program - note that the first argument of 
mmap is the same when the crash occurs:
#log:mmap(0x2a96300000, 1048576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2a96300000
#log:mmap(0x2a96400000, 1048576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2a96400000
#log:mmap(0x2a96500000, 11978664837120, PROT_READ|PROT_WRITE|PROT_EXEC, 
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 EINVAL (Invalid argument)
#log:write(2, "getMBlock: mmap: Invalid argumen"..., 33) = 33

And a third one:
#mprotect(0, 1048264, PROT_NONE)         = -1 ENOMEM (Cannot allocate memory)
#...
#munmap(0x2a95c4f000, 131072)            = 0
#--- SIGSEGV (Segmentation fault) @ 0 (0) --

I think we are at a dead end right now but at least I've become quite familiar 
with building ghc :-)

Cheers 
Peter