[Vm-dev] Squeak COG v3 hangs during startup

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Tue Feb 28 01:31:16 UTC 2017

Bissecting tells that the problem appeared in

That is somewhere between VMMaker.oscog-eem.2079 (excluded) and
Quite a large range, but stack.v3 works and spur works too, so not all
changes are relevant...

2017-02-28 2:26 GMT+01:00 Nicolas Cellier <
nicolas.cellier.aka.nice at gmail.com>:

> Hi,
> I can't open an image with recent squeak.cog.v3 builds (at least on
> macosx).
> The VM hangs in a sort of infinite loop with 100% CPU before the window
> open
> If I sample the application I get something like
> ...snip...
> The squeak.stack.v3 still works.
> The hang is reproducible in simulator:
> | cos |
> cos := CogVMSimulator newWithOptions: #(Cogit StackToRegisterMappingCogit
> ).
> cos desiredNumStackPages: 8.
> cos openOn: '/some_path_to/Squeak4.6-15102.image'.
> cos openAsMorph; run
> it hangs around counters 13000/993
> and I've got this kind of output:
> ...snip...
> each time I interrupt the VM, it seems to loop in
> findMethodWithPrimitive:FromFP:UpToContext:
> I did not try to bissect when this happened, but the red status of
> continuous integration may well be related to this.
> We can't live forever with this red status, it's like not having CI
> feedback at all. Either we declare cog.v3 as unsupported or we fix it.
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