SIGFPE with FPE_FLTRES (original) (raw)

David Holmes - Sun Microsystems David.Holmes at Sun.COM
Wed Mar 25 23:10:02 UTC 2009

The code was innocuous as far as I can see. One place does some basic calculations with some values used for GC statistics. The other was a crash here:

double cpuTimer::seconds() const { double count = (double) _counter; double freq = (double) os::elapsed_frequency(); return count/freq; }

and os::elapsed_frquency is a constant (100010001000) on Solaris.

Both crashes occurs on 64-bit on Solaris AMD64.

Thanks, David

Tom Rodriguez said the following on 03/26/09 08:53:

FPEFLTRES appears to concern inexact results being produced but these kinds of exception should always be masked for us. In what kind of code was this reported?

tom On Mar 24, 2009, at 5:58 PM, David Holmes - Sun Microsystems wrote:

Can someone tell me when you can encounter a SIGFPE with sicode FPEFLTRES? I'm suspecting this may be a case where a "bad" operation doesn't in itself fail but the next (innocent) FP operation gets hit with the FPE.

Thanks, David Holmes

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