[Vm-dev] arm64 Cog Segfault [WAS Re: Aarch64 number bug]

Bruce O'Neel bruce.oneel at pckswarms.ch
Thu Aug 5 14:30:16 UTC 2021


Yes, that's what I see as well.

I was just curious because Tim is sucessfully building and running cog
ARM64 VMs.  Maybe there is something special in the water on the West
Coast or something.

As you say the stack VM works perfectly.



On 2021-08-05T15:49:50.000+02:00, <ken.dickey at whidbey.com> wrote:

> Bruce,
> On Aarch64/arm64 you need to build and use the Stack VM at present.
> There is an open issue with arm64 Cog segfaulting:
> "Getting a segmentation fault on the latest squeak.cog.spur #574"
>  From my uninformed (not really a C/gdb user) view, it appears that the 
> stack pointer gets trashed at some semi-random point.  Without a Logic 
> Analyzer or other method of deep trace, this kind of random/blue-moon 
> crash is really hard to troubleshoot.
> IMHO, the continuing base problem is lack of people with both deep, 
> knowledgeable debugging skills AND the time to look.  Few people.  Busy 
> lives.  More VM Love needed by the community, i.e. US.
> FYI,
> -KenD

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