Re: Libm core dump with SIGILL

[Anders Magnusson <ragge%ludd.ltu.se@localhost>]

Greg Stark skrev den 2015-08-21 17:27:
> On Fri, Aug 21, 2015 at 4:22 PM, Mouse <mouse%rodents-montreal.org@localhost> wrote:
> > As for the original issue, it looks to me as though it is either pilot
> > error (if the package is documented as requiring IEEE floats), a bug in
> > the documentation (if it's supposed to require IEEE floats but isn't
> > documented that way), or a bug in the tests (if it's not supposed to
> > require IEEE floats).
>
> Postgres doesn't in theory require IEEE floats, though I think every
> other platform has them at this point so users might be surprised.
>
> It just seems like we assumed any failures would manifest with an FPE,
> not some other signal.
Have you tried to add your own infnan(), for example what given in the 
man page?

#include           <math.h>
#include           <errno.h>
extern int         errno ;
double  infnan(iarg)
        int        iarg ;
{
        switch(iarg)    {
        case        ERANGE:        errno = ERANGE; return(HUGE);
        case       -ERANGE:        errno = EDOM;   return(-HUGE);
        default:                   errno = EDOM;   return(0);
        }
}

Or instead of returning values, do "kill(0, SIGFPE);"

?

-- Ragge