Date: Mon, 18 Feb 2019 21:24:09 +0100 From: "Herbert J. Skuhra" <herbert@gojira.at> To: Konstantin Belousov <kostikbel@gmail.com> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: Re: svn commit: r344157 - stable/12/lib/libc/x86/sys Message-ID: <20190218202409.lcflw6nhdaog4aws@mail.bsd4all.net> In-Reply-To: <20190218140305.GH2420@kib.kiev.ua> References: <201902151133.x1FBXmHU060955@repo.freebsd.org> <87d0nqazuq.wl-herbert@gojira.at> <20190217211916.GD2420@kib.kiev.ua> <87bm3aawcn.wl-herbert@gojira.at> <20190218075814.GE2420@kib.kiev.ua> <20190218113745.skk5eoofarzsjbq6@mail.bsd4all.net> <20190218140305.GH2420@kib.kiev.ua>
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On Mon, Feb 18, 2019 at 04:03:05PM +0200, Konstantin Belousov wrote: > On Mon, Feb 18, 2019 at 12:37:45PM +0100, Herbert J. Skuhra wrote: > > On Mon, Feb 18, 2019 at 09:58:14AM +0200, Konstantin Belousov wrote: > > > On Sun, Feb 17, 2019 at 11:22:48PM +0100, Herbert J. Skuhra wrote: > > > > On Sun, 17 Feb 2019 22:19:16 +0100, Konstantin Belousov wrote: > > > > > > > > > > On Sun, Feb 17, 2019 at 10:07:09PM +0100, Herbert J. Skuhra wrote: > > > > > > On Fri, 15 Feb 2019 12:33:48 +0100, Konstantin Belousov wrote: > > > > > > > > > > > > > > Author: kib > > > > > > > Date: Fri Feb 15 11:33:48 2019 > > > > > > > New Revision: 344157 > > > > > > > URL: https://svnweb.freebsd.org/changeset/base/344157 > > > > > > > > > > > > > > Log: > > > > > > > MFC r343855, r343859: > > > > > > > Use ifunc to select the barrier instruction for RDTSC. > > > > > > > > > > > > > > Modified: > > > > > > > stable/12/lib/libc/x86/sys/__vdso_gettc.c > > > > > > > Directory Properties: > > > > > > > stable/12/ (props changed) > > > > > > > > > > > > After upgrading my Soekris Net 6501-70 (amd64) to this revision the > > > > > > system is unusable. Basically all programs produce a "Segmentation > > > > > > fault (core dumped)": > > > > > > > > > > > > pid 856 (ls), jid 0, uid 1001: exited on signal 11 (core dumped) > > > > > > pid 857 (ls), jid 0, uid 1001: exited on signal 11 (core dumped) > > > > > > pid 858 (bsdtar), jid 0, uid 0: exited on signal 11 (core dumped) > > > > > > pid 859 (sh), jid 0, uid 0: exited on signal 11 (core dumped) > > > > > > pid 876 (dmesg), jid 0, uid 1001: exited on signal 11 (core dumped) > > > > > > pid 877 (su), jid 0, uid 0: exited on signal 11 > > > > > > pid 880 (more), jid 0, uid 1001: exited on signal 11 (core dumped) > > > > > > pid 885 (sudo), jid 0, uid 0: exited on signal 11 > > > > > > > > > > What do you have in your make.conf and src.conf ? > > > > > > > > I am building on a faster machine with a Intel(R) Xeon(R) CPU. > > > > > > > > /etc/src.conf: > > > > > > > > WITHOUT_DEBUG_FILES= > > > > WITHOUT_KERNEL_SYMBOLS= > > > > WITHOUT_PROFILE= > > > > WITH_KERNEL_RETPOLINE= > > > > > > > WITH_RETPOLINE= > > > ^^^^^^ > > > Remove this setting and rebuild the world. > > > Is it still broken ? > > > > No, without the line "WITH_RETPOLINE=" the system is OK. > > Which version of clang do you get ? It was recently bumped from 6.0.1 > to 7.0.1, and there was a ifunc use in libc in quite fundamental place > already. Build machine is still on stable/12 r343834 (clang 6.0.1). Problem starts with r344157 (also clang 6.0.1). Now the affected machine runs r344247 (clang 7.0.1). -- Herbert
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