Date: Tue, 1 Oct 2002 16:37:23 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Archie Cobbs <archie@freebsd.org> Cc: freebsd-alpha@freebsd.org Subject: Re: alpha/43567: strtod() core dumps Message-ID: <15770.1923.354337.452249@grasshopper.cs.duke.edu> In-Reply-To: <200210012021.g91KL1Ec032894@beast.freebsd.org> References: <200210012021.g91KL1Ec032894@beast.freebsd.org>
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Archie,
Can you try rebuilding libc with -miee?
Eg:
.if ${MACHINE_ARCH} == "alpha"
CFLAGS += -mieee
.endif
I think that should probably go into bsd.lib.mk
People might complain becase that slows down fp operations, but if
people care about performance, they should really be using the compaq
libm anyhow.
Drew
Archie Cobbs writes:
>
> >Number: 43567
> >Category: alpha
> >Synopsis: strtod() core dumps
> >Confidential: no
> >Severity: serious
> >Priority: medium
> >Responsible: freebsd-alpha
> >State: open
> >Quarter:
> >Keywords:
> >Date-Required:
> >Class: sw-bug
> >Submitter-Id: current-users
> >Arrival-Date: Tue Oct 01 13:30:02 PDT 2002
> >Closed-Date:
> >Last-Modified:
> >Originator: Archie Cobbs
> >Release: FreeBSD 5.0-CURRENT alpha
> >Organization:
> Packet Design
> >Environment:
> System: FreeBSD beast.freebsd.org 5.0-CURRENT FreeBSD 5.0-CURRENT #32: Mon Sep 23 14:10:02 PDT 2002 peter@beast.freebsd.org:/usr/src/sys/alpha/compile/BEAST alpha
>
> >Description:
> The strtod() function barfs when given certain inputs.
>
> >How-To-Repeat:
>
> Compile this program and run the commands below:
>
> ----------------------------------------------------------------------
> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>
> #include <errno.h>
> #include <err.h>
>
> #define INPUT "5e-324"
>
> int
> main(int ac, char **av)
> {
> const char *ascii = INPUT;
> double value;
>
> switch (ac) {
> case 1:
> break;
> case 2:
> ascii = av[1];
> break;
> default:
> errx(1, "usage: strtod-test [string]");
> }
> printf("input is \"%s\"\n", ascii);
> printf("result: ");
>
> /* Parse double value */
> errno = 0;
> value = strtod(ascii, NULL);
> if (errno == ERANGE) {
> if (value == 0.0) {
> printf("underflow\n");
> return (0);
> }
> if (value == HUGE_VAL || value == -HUGE_VAL) {
> printf("overflow\n");
> return (0);
> }
> }
>
> printf("value is %g\n", value);
> return (0);
> }
> ----------------------------------------------------------------------
>
>
> $ cc -Wall -o xx xx.c
> $ ./xx 5e-304
> input is "5e-304"
> Floating exception (core dumped)
>
> >Fix:
>
> ?
>
> >Release-Note:
> >Audit-Trail:
> >Unformatted:
>
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