Em 02-01-2011 21:15, Eliot Miranda escreveu:
> Hi Martin, Hi All,
Ok,

Today I downloaded new version of cog (svn) & compiled. Crashes are fixed.

unixbuild fails to install automatically (make install). Somewhere it 
execs squeak.sh which fails (no imaqe & no sources) & then the rest of 
installation process must be done by hand (make install-plugins; make 
install-doc; cp inisqueak squeak <cogsrc>/bin etc...).

Regards,

CdAB
>
>     so find new VMs in VM.r2341/ 
> <http://www.mirandabanda.org/files/Cog/VM/VM.r2341/>.  The linux 
> crashes (certainly the one you suffered from Martin) seem to be caused 
> by an optimization bug (but they could be caused by bad code 
> generation, creating something that assumes ordering constraints which 
> C doesn't guarantee).  I suspect the former because I don't see the 
> crash when running exactly the same VM and image from a different 
> directory; provoking the crash requires a particular path (go figure; 
> I haven't pinned this down yet).
>
> So my "fix" is preventing a complex function being inlined into the 
> main interpreter loop, removing the sources of some warnings, and 
> lowering the optimization level of the gcc3x-cointerp.c file to -O1 
> from -O2 (my build environment, CentOS Linux 5.3, uses gcc 4.1.2). 
>  I'm not proud of this "fix".  I've violated the Deutsch criterion by 
> not diagnosing the cause of the bug so I can't stand behind this fix; 
> it's a hack that appears to work and may have merely pushed the real 
> bug further underground.  Alas I don't have time to do a better job. 
> Hopefully it'll get those of you on linux going again.
>
> best
> Eliot
>

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