Date: Thu, 26 Apr 2018 12:06:21 +0200 From: Dimitry Andric <dim@FreeBSD.org> To: Dewayne Geraghty <dewayne.geraghty@heuristicsystems.com.au> Cc: Andre Albsmeier <Andre.Albsmeier@siemens.com>, FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: gptboot broken when compiled with clang 6 and WITHOUT_LOADER_GELI -- clang 5 is OK Message-ID: <3A857D03-607A-4983-A4C2-D3A93119297A@FreeBSD.org> In-Reply-To: <fd725966-e7c2-28e8-cea5-68473ad7b00d@heuristicsystems.com.au> References: <20180425165840.GA1330@bali> <fd725966-e7c2-28e8-cea5-68473ad7b00d@heuristicsystems.com.au>
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--Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 26 Apr 2018, at 06:17, Dewayne Geraghty = <dewayne.geraghty@heuristicsystems.com.au> wrote: >=20 > Andre, You're not alone. I think there's a problem with clang6 on = i386 > FreeBSD 11.1X, refer: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227552 > https://forums.freebsd.org/threads/uptime-w-i386-breakage.65584/ > and perhaps also on amd64, search for > = https://bugs.freebsd.org/bugzilla/buglist.cgi?quicksearch=3Dclang&list_id=3D= 226390. >=20 > Without time to investigate I've reverted userland > FreeBSD 11.2-PRERELEASE r332843M amd64 1101515 1101509 > FreeBSD 11.2-PRERELEASE r332843M i386 1101515 1101509 As noted in another post, I cannot reproduce the problems with gptboot, but with FreeBSD-11.2-PRERELEASE-i386-20180420-r332802, I do indeed see w and uptime crashing in libxo: (gdb) bt #0 ifree (tsd=3D0x28000000) at arena.h:799 #1 0x2814b506 in __free (ptr=3D0x280601ef) at tsd.h:716 #2 0x2808bb07 in xo_do_emit_fields () at = /usr/src/contrib/libxo/libxo/libxo.c:6419 #3 0x28089a1c in xo_do_emit (xop=3D<value optimized out>, flags=3D<value = optimized out>, fmt=3D0x804ad4d "{:time-of-day/%s} ") at = /usr/src/contrib/libxo/libxo/libxo.c:6470 #4 0x28089b61 in xo_emit (fmt=3D0x804ad4d "{:time-of-day/%s} ") at = /usr/src/contrib/libxo/libxo/libxo.c:6541 #5 0x08049f50 in main (argc=3D<value optimized out>, argv=3D<value = optimized out>) at /usr/src/usr.bin/w/w.c:475 #6 0x080494cd in _start1 () #7 0x08049448 in _start () #8 0x00000000 in ?? () Not sure if this has anything to do with clang though, it looks more like a double free to me, at first glance. I'll do some debugging. -Dimitry --Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.2 iF0EARECAB0WIQR6tGLSzjX8bUI5T82wXqMKLiCWowUCWuGknQAKCRCwXqMKLiCW o/EBAKDxBJJ7xA0p4eoQRt/xd+cTcIBTzwCeOkHqM3pfTLLR6F9LVvBPxl2L7jc= =dpf3 -----END PGP SIGNATURE----- --Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9--
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