[oi-dev] Virtual address space and Firefox

[Till Wegmueller]

I think we should also ask on illumos-developer for this.

Not many illumos devs are on this list that know this deep enough.

-Till

On 13.03.21 04:58, Carsten Grzemba via oi-dev wrote:
> On building FF for OI I run in core dumps.
> 
> It seems that this are raised by MOZ_ASSERTION because the JS-engine 
> (spidermonkey) expects that  addresses for JS Values are not in the 
> upper memory area:
> 
> ptr must be a valid user-mode pointer, with the top 16 bits clear
> 
> The ptr is for example 0xfffffbffef120fb0 so the address is too high in 
> this case. pmap shows the related range as mmap allocated area (anonymous)
> Related the assertions there was a change in FF68.2
> 
> In solaris-userland Oracle has placed a patch but only for Sparc: 
> sparc-47bit-VA-space.patch
> This use a mapfile with
> RESERVE_SEGMENT spidermonkey_reserve {
>        VADDR = 0x800000000000;
>        SIZE = 0xffff7fffffff0000;
> };
> Illumos ld don't know the option RESERVE_SEGMENT, but it is for Sparc 
> how I already stated.
> 
> Do IllumOS use the whole 64bit address space and not only the expected 
> 47bit? Or I am completly wrong here in the maze of physical and virtual 
> address spaces?
> -- 
> Carsten
> 
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