[Vm-dev] Re: Cog JIT crashing

Igor Stasenko siguctua at gmail.com
Fri Jul 1 09:21:27 UTC 2011

Looks like your latest update cured the issue.
Cog VMs are not crashing at image startup anymore.

On 30 June 2011 21:00, Igor Stasenko <siguctua at gmail.com> wrote:
> On 30 June 2011 21:24, Eliot Miranda <eliot.miranda at gmail.com> wrote:
>> Hi Igor,
>>     the problem is some bug in the Slang inliner that causes bad code to be
>> generated (if inlining is done in the Cogit).  Previously inlining for the
>> Cogit was disabled (Cogit class>>doInlining).  But with the Newspeak changes
>> I needed inlining to be applied selectively so
>> that offsetAndSendTableFor:annotation:into: would be inlined (it uses a
>> block idiom to return multiple values and so must be inlined to be easily
>> converted to C).  So I changed the Cogit's inlining policy to #asSpecified
>> and that introduced the regression; where I don't know.  If I hack it so
>> that *only* offsetAndSendTableFor:annotation:into: gets inlined then I can
>> successfully run the TestRunner in a trunk Squeak 4.2 image, and if I don't
>> it soon dies horribly.  It'll take some time to track down the inlining bug.
>>  If you're interested in looking for it then great.  If not, the attached
>> hack will get you going.
> Yes, i think i will proceed with this hack, because i want to check
> that there are no other problems.
> As you can see, a recent update uncovered quite a number of
> bugs/regressions. Most of them are discovered by mr. Hudson, so we
> should say thank to him :)
> I want to have Hudson building stable VMs, so we could run a tests for
> them , and of coure i want people to try them out.
> Apart of it, there's many other things to fix (Freetype plugin,
> osprocess plugin , windows stack vm etc).
> Cocoa VMs also are broken now and need to be fixed.
> So i cannot afford right now burying into code generator :(
> --
> Best regards,
> Igor Stasenko AKA sig.

Best regards,
Igor Stasenko AKA sig.

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