Messages in this thread | | | From | "Ulrich Windl" <> | Date | Mon, 22 Apr 1996 11:16:58 +0200 | Subject | Re: signal(SIGFPE,SIG_IGN) causes endless loop |
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On 21 Apr 96 at 19:01, Thomas Koenig wrote:
> In linux.dev.kernel, Linus Torvalds <torvalds@cs.helsinki.fi> wrote: > > - it's stupid. What is the result of a division with 0? For FP errors, > > there are reasonable things we can do (+-Inf), but for integer > > division by zero the result is undefined. Allowing the program to just > > "continue" as if nothing happened without letting it handle signals is > > the _wrong_ thing to do. > > > There are quite a number of reasonable situations, for example image > processing, where I might want to ignore an error like that, and don't > care what the result is (which might show up as a single pixel in error, > which is no big deal, and also can happen in 69 other ways). > > If I write 'ignore this kind of thing', I mean it. I don't think the > kernel should set policy here.
Maybe it's a probem with the CPU: There should be a status flag to ignore creating that exception. (I think in VAX assembler you can do it that way).
> > I could live with SIGFPE not being ignorable, if I get IEEE behaviour > for floats. Having the program go into an endless loop is... rude > at least, and very highly frustrating. Have you ever sent off a program > which runs for days, and which then goes into an endless loop after > ten seconds?
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