From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <jscott@posteo.net>
Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66])
	by sourceware.org (Postfix) with ESMTPS id 7D2203858C83
	for <crossgcc@sourceware.org>; Sat, 29 Oct 2022 21:37:16 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 7D2203858C83
Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=posteo.net
Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=posteo.net
Received: from submission (posteo.de [185.67.36.169]) 
	by mout02.posteo.de (Postfix) with ESMTPS id 9959C240101
	for <crossgcc@sourceware.org>; Sat, 29 Oct 2022 23:37:14 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017;
	t=1667079434; bh=chTya8VN7RF/5S6EpHQNYLcVOJ7SRoHzx4sD8vBtaSY=;
	h=Subject:From:To:Date:From;
	b=qiEKhFo0qQ3xnFE4mbRQgPw/N/XilNHxFg4gHZ+7a5CIxNjTN2GazAq1a9t7LH7Sm
	 2fzNhK/GpoXa/1R145o+pzUJV7BZn7V7A2Ompwbbb/H6X048jA2/hUf6X9LR7nBjUA
	 +lQug5fNTRj7YFnregj6stVu2WNz12UkOgs8kLTqykoNrn2YPaFm6yxk2nOoKIiCqu
	 hECzHDDwOAuB/kbdwtvkbDASE+meMqNvWnc80jpSyDs2FWNmkAdnsaTeInnZz+/Pp/
	 afAAIzfrAnn66Ykt/jpjhQ06VVOzOb7IckydkH1MYZJ7U/zGrOFhAgtXm38m06cRlE
	 1Zg8Mz9yVFlrg==
Received: from customer (localhost [127.0.0.1])
	by submission (posteo.de) with ESMTPSA id 4N0CRs2z1jz9rxG
	for <crossgcc@sourceware.org>; Sat, 29 Oct 2022 23:37:12 +0200 (CEST)
Message-ID: <c943a5e03922fc555c4a2a6a2a468b9428a4b2ec.camel@posteo.net>
Subject: Help with a hang in snprintf() for sh-elf
From: John Scott <jscott@posteo.net>
To: crossgcc@sourceware.org
Date: Sat, 29 Oct 2022 21:37:05 +0000
Jabber-ID: pert@member.fsf.org
Content-Type: multipart/signed; micalg="pgp-sha256";
	protocol="application/pgp-signature"; boundary="=-zjT0NcnM4Ea67VOi6ZD9"
MIME-Version: 1.0
X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org
List-Id: <crossgcc.sourceware.org>


--=-zjT0NcnM4Ea67VOi6ZD9
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi,

I'm the maintainer of gcc-sh-elf for Debian, and I'm curious why the
following program seems to hang with GCC 12, Newlib 3.3.0, and Binutils
2.37, running the program under the appropriate simulator from GDB:

$ cat test.c
#include <stdio.h>
int main(void) {
	snprintf(NULL, 0, "%lf", 1.0);
}

$ sh-elf-gcc test.c
$ sh-elf-run a.out
$ # hangs

Note that if the floating point number is changed to 0.0, the hang
doesn't happen anymore.

The recipe used to build this cross toolchain can be seen at
https://salsa.debian.org/electronics-team/toolchains/gcc-sh-elf/-/blob/late=
st/debian/rules

I ran into this hang running the Newlib test suite.


--=-zjT0NcnM4Ea67VOi6ZD9
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----

iIgEABYIADAWIQSiPzylvTnZ6xisfzWz9N0oYfTNugUCY12dAhIcanNjb3R0QHBv
c3Rlby5uZXQACgkQs/TdKGH0zbrODQEAtfxB0/W22Q8o6b3e6GT34k8/Lg8ZrKl7
msgfvANdJjABAM+0Lq6vieSNoLSdbuyrHZQweur55jfR6Eb2+mC5zlEE
=KYLF
-----END PGP SIGNATURE-----

--=-zjT0NcnM4Ea67VOi6ZD9--