Dimitry Andric <d...@freebsd.org> writes: > On 26 Apr 2018, at 12:06, Dimitry Andric <d...@freebsd.org> wrote: >> >> On 26 Apr 2018, at 06:17, Dewayne Geraghty >> <dewayne.gerag...@heuristicsystems.com.au> wrote: >>> >>> 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=227552 >>> 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=clang&list_id=226390. >>> >>> 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=0x28000000) at arena.h:799 >> #1 0x2814b506 in __free (ptr=0x280601ef) 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=<value optimized out>, flags=<value >> optimized out>, fmt=0x804ad4d "{:time-of-day/%s} ") at >> /usr/src/contrib/libxo/libxo/libxo.c:6470 >> #4 0x28089b61 in xo_emit (fmt=0x804ad4d "{:time-of-day/%s} ") at >> /usr/src/contrib/libxo/libxo/libxo.c:6541 >> #5 0x08049f50 in main (argc=<value optimized out>, argv=<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. > > Strangely, simply recompiling libxo fixes the problem, or at least works > around it. This is on the r332802 snapshot, so I guess the libxo.so.0 > file shipped may be broken, somehow.
Actually, that is a recurring bug (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227552) and does seem to be some kind of initialization problem with clang. _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
