From owner-freebsd-bugs@FreeBSD.ORG Tue Jun 14 06:43:05 2011 Return-Path: Delivered-To: freebsd-bugs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ED77E106566C for ; Tue, 14 Jun 2011 06:43:04 +0000 (UTC) (envelope-from oliver.pntr@gmail.com) Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id 836938FC0A for ; Tue, 14 Jun 2011 06:43:04 +0000 (UTC) Received: by wwc33 with SMTP id 33so5430927wwc.31 for ; Mon, 13 Jun 2011 23:43:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=a/xtrhi3u8zxu2Bzddzv7ChIWbdLrjLuSiKJp+cjmYM=; b=kQURrSptRLaaeVkNmIT0pSaiWmIVDAxQVY3qP4ndNRm1rLAPkZGsX1vwMRUX9jC2X8 AjjlXf7qlKI5MTlMX2P9hhlh4GiggQfYUem+BDUsoUKBbC0OAMbNZ+sHL7N3h9iE6qn3 mgemIUT25Meopl2X7c91jpC/Yw12axuE8Alak= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=JwA7uBqY/EEkw3RagYVUqc8T8L3VKf3EXQo6cHID0AzZffE/1xzyW6xHFmnj0u1M6S DtR4URGhr6p2mHiYXQbvkLO+RUPu8u9XeKK1R6MtOnBtf2CAFgj4K1rLz+cZ77rqmMyM t8oDR/sKTwoKndB9LAuA5aGIYRrP/WDwHE9QU= MIME-Version: 1.0 Received: by 10.227.2.81 with SMTP id 17mr6121044wbi.15.1308032336136; Mon, 13 Jun 2011 23:18:56 -0700 (PDT) Received: by 10.227.209.209 with HTTP; Mon, 13 Jun 2011 23:18:56 -0700 (PDT) In-Reply-To: <201106140400.p5E40OML033995@freefall.freebsd.org> References: <201106140400.p5E40OML033995@freefall.freebsd.org> Date: Tue, 14 Jun 2011 08:18:56 +0200 Message-ID: From: Oliver Pinter To: Robert Lorentz Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-bugs@freebsd.org Subject: Re: bin/157177: primes(1) prints non-prime for numbers > 2^32 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Jun 2011 06:43:05 -0000 On 6/14/11, Robert Lorentz wrote: > The following reply was made to PR bin/157177; it has been noted by GNATS. > > From: Robert Lorentz > To: bug-followup@FreeBSD.org, > kcwu@kcwu.csie.org > Cc: > Subject: Re: bin/157177: primes(1) prints non-prime for numbers > 2^32 > Date: Mon, 13 Jun 2011 23:29:33 -0400 > > I regression tested this on FreeBSD 8.2-RELEASE against FreeBSD = > 9.0-CURRENT r221981, using primegen-0.97 on amd64 platform and came up = > with some interesting results. > > First off, from primes(1) man page, syntax is: > > primes [ low [high] ] > > So your bc line effectively says: > > primes 4294967296=20 > > Where low =3D 4294967296 and high is not explicitly stated. According = > to the man page high defaults to 1000000000 where the last prime = > possible is 999999937. Since 1,000,000,000 < 4,294,967,296, the correct = > output of "primes 4294967296" should be nothing. > > In FreeBSD 8.2-RELEASE, primes correctly does output nothing. > > However on FreeBSD 9.0-CURRENT, primes incorrectly prints primes = > starting at 4,294,967,296 and seems to go forever (not sure where it = > will stop). This is contrary to what the manual page says and is a = > problem. > > Your original problem I did regression test and confirm to be working in = > 8.2-RELEASE and broken in 9.0-CURRENT. I isolated one of your examples = > using: > > primes 4295360520 4295360522 | xargs -n 1 factor > > On FreeBSD 9.0-CURRENT: 4295360521: 65539 65539 > On FreeBSD 8.2-RELEASE: No output=20 op@pandora-d ~> uname -m -r -p && primes 4295360520 4295360522 | xargs -n 1 factor 7.4-STABLE amd64 amd64 4295360521: 65539 65539 > > > On FreeBSD 9.0-CURRENT I debugged the source in = > /usr/ports/math/primegen/work/primegen-0.97 a bit and realized that if I = > ran the compiled version in = > /usr/ports/math/primegen/work/primegen-0.97/primes I got the correct = > expected results. However, if I run the installed version in = > /usr/games/primes, I get the incorrect results. The binaries in those = > two places aren't the same (verified using md5). =20 > > This appears to be an issue with the port building, probably building in = > 32 bit. If the inputs to primes are interpreted as 32bit then a "low" = > of (2^32 + 1) is interpreted as 1, therefore being less than 1000000000, = > therefore the code would continue to generate primes, and if this is the = > case then I wouldn't be surprised that the prime generation code also = > would misbehave. > > _______________________________________________ > freebsd-bugs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-bugs > To unsubscribe, send any mail to "freebsd-bugs-unsubscribe@freebsd.org" >