[Vm-dev] Re: I need help building Cog on 64bit Linux (new Squeak server)

[Nicolas Cellier]

Hi Dave,
I did not have time to test the Smalltalk script, but I compiled an
already generated interpreter VM with gcc 4.6.3.
Passing the tests didn't cause any crash, so it seems that despite it
is relying on some UB, we can still compile with a recent gcc, and
that the -fcaller-saves problem only strikes the COG VM...

Nicolas

2013/2/7 David T. Lewis <lewis at mail.msen.com>:
>
> Really good analysis to figure out that the issue is associated with the
> -fno-caller-saves option!
>
> I wonder why we are not seeing crashes with the Cog and interpreter VMs
> that are built locally on box3.squeak.org. These are being compiled with
> gcc 4.4.5 with latest oscog and trunk sources, and the resulting VMs work
> well enough to run the Squeak test suites. They are running headless and
> have a reduced set of plugins, so I wonder if perhaps the problem areas
> may be in plugins or in the display module?
>
> If you have the patience to try another experiment, could you check and
> see if an interpreter VM crashes on the same system with the same compiler?
> Build it with a squeak image from ftp://ftp.squeak.org/4.4/ and file in
> the script http://squeakci.org/job/InterpreterVM/ws/VMUnixBuild.st to do
> the build (but first edit VMUnixBuild.st to set exitWhenDone := false).
>
> BTW I agree that the error message is much better in French localization.
> I would not understand that error message in any language, but it definitely
> sounds better in French :)
>
> Dave
>
> On Thu, Feb 07, 2013 at 01:18:54AM +0100, Nicolas Cellier wrote:
>>
>> I confirm, same crash as Ken with a gcc4.4.3 and gcc4.6.3 compiled VM.
>>
>> Since analyzing all gcc warnings is like looking for a needle in a
>> haystack, I tried another angle of attack.
>>
>> So you might be interested in
>> http://smallissimo.blogspot.fr/2013/02/compiling-squeak-cog-virtual-machine-on.html
>>
>> Nicolas
>>
>> 2013/1/28 Ken Causey <ken at kencausey.com>:
>> >
>> > On 01/28/2013 04:04 PM, Ken Causey wrote:
>> >>
>> >>
>> >> SUnit Results
>> >> -------------
>> >> 3272 run, 3251 passes, 19 expected failures, 1 failures, 0 errors, 1
>> >> unexpected passes
>> >>
>> >> Failed Tests
>> >> ------------
>> >> (AllocationTest selector: #testOneGigAllocation) debug.
>> >> (LocaleTest selector: #testLocaleChanged) debug.
>> >>
>> >> Errors
>> >> ------
>> >>
>> >
>> > For what it's worth I get the same results with svn head (2675):
>> >
>> > 4.0-2673 #1 Mon Jan 28 23:08:31 CET 2013 gcc 4.3.5
>> > CoInterpreter VMMaker.oscog-eem.258 uuid:
>> > da1433f1-de50-475f-be33-f462b300a2ea Jan 28 2013
>> > StackToRegisterMappingCogit VMMaker.oscog-eem.256 uuid:
>> > bfea3efd-4e81-4e85-922e-cf4f58ee5d64 Jan 28 2013
>> > VM: r2673 http://www.squeakvm.org/svn/squeak/branches/Cog
>> >
>> > Plugins: r2545 http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins
>> > Linux squeak-box4 2.6.32-xenU-7428-x86_64 #4 SMP Mon Nov 19 10:17:25 UTC
>> > 2012 x86_64 GNU/Linux
>> > plugin path: /home/kencausey/source/cog/svn/Cog/unixbuild/bld/ [default:
>> > /home/kencausey/source/cog/svn/Cog/unixbuild/bld/]
>> >
>> > Ken