Sysmalloc on OSX 64-bit

[Dan Nilsson]

Hi all,

I have a mad plan of calling into LuaJIT through Java native calls on OSX
64bit (ultimately to transform lua source into bytecode). It seems like it
should be doable, but I have encountered a problem:

Luajit on OSX 64-bit says to link with:
-pagezero_size 10000 -image_base 100000000

I will have no control over that (as executable will be a java
application), so I figured I could just use sysmalloc in this case and not
rely on luajit¹s own allocator.

=> #error "Must use builtin allocator for 64 bit target

Would it be asking for trouble to just ignore this and remove the #error
so I can build it with sysmalloc anyway?

What is the reason for this requirement?

Any help would be appreciated,

Thanks!
Dan

[Karel Tuma]

Post by Dan Nilsson
-pagezero_size 10000 -image_base 100000000

munmap(0,1LL<<32) (this is the default, figure out __PAGEZERO
at runtime to make it robust).

Post by Dan Nilsson
=> #error "Must use builtin allocator for 64 bit target
Would it be asking for trouble to just ignore this and remove the #error
so I can build it with sysmalloc anyway?

Don't.

Post by Dan Nilsson
What is the reason for this requirement?

Pointers must fit 32 bits, and speed.

K.