[squeak-dev] OSProcess forkSqueak etc cause crash, 5.3 (with recent ARMv8 VM) and 6.0

tim Rowledge tim at rowledge.org
Sun Jul 10 04:32:35 UTC 2022

Well the oldest VM I have a copy sitting around is 5.0-202204040809 and that go boom.

So, let's grab some older ones and see what we can see

5.0-202106302111-64bit - the oldest I can find on github that has an ARMv8 build; boom.

OK, so substituting the plugin doesn't offer much hope. If I actually run the ancient vm - 5.0-202106302111-64bit (assert) - with the 6.0 image and try a simple `UnixProcess forkSqueak` then it looks like the original image/vm dies but the forked child *sort of* starts. I get a filestream primGetPosition: failure, which I imagine might not be a surprise from the comment. And of course, you can't do a clean quit at that point.

If I try with a 5.3 image it just all go boom.

Also tried with a 202112022203 vm and that seems to kill the original and open a blank new window? And of course it won't run the v6 image at all.

So all in all it looks unpleasantly like it hasn't ever worked on a Pi, which must mean I haven't tried it since I ran my Pis in 32bit-land. What fun...

> On 2022-07-08, at 1:52 PM, David T. Lewis <lewis at mail.msen.com> wrote:
> On Fri, Jul 08, 2022 at 01:20:55PM -0700, tim Rowledge wrote:
>> I just tried using the #forkSqueak and related methods on both my old working 5.3 image (with a recent VM) and the release 6.0 system. In both it simply blows away the system. I know it used to work but no way can I remember how long it might be since I last checked.
>> Anybody else using a Pi (or an Apple M1/2) seeing similar? I can provide crash.dmp etc later.
> One tip - if you happen to have an older VM for which it was working, try
> borrowing the plugin from that VM (copy it into your current VM folder).
> That should at least bisect the problem into the nearest decade.
> Dave

tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Strange OpCodes: ESBD: Erase System and Burn Documentation

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