Re: Continuations

Scott Lurndal <scott@slp53.sl.home> schrieb:

Thomas Koenig <tkoenig@netcologne.de> writes:

EricP <ThatWouldBeTelling@thevillage.com> schrieb:
>

Anyway, at the time I made a mental note about the relative cost of
heap allocation of stack space in an ABI.

>
I wonder if I might mention my dislike of arbitrary limits on
stack size that are imposed on modern 64-bit systems.

>
$ ulimit -s unlimited
>
Should handle the default stack.

Some operating systems put a hard limit on this, for example MacOS,
and some an absurdly low limit on per-thread stack size (512 K
or something like that).

Of course, it still needs to fit into whatever address space
the target processor offers, but even with a 48-bit VA,
there should be enuf VA space for several terabytes of
stack.

In any case, one can mmap an arbitrarily large region of
memory and assign it to the stack pointer in (or even before)
main().

Changing the standard startup sequence of programs (i.e. replacing
_start) - that would be heavy messing, and be no longer compatible
with standard startup sequences.

And for threads, this would get even messier.