OK, I was able to reproduce this. I am trying to reduce the testcase.
On 30 April 2013 14:23, Dimitry Andric <d...@freebsd.org> wrote: > On Apr 30, 2013, at 18:34, Jan Beich <jbe...@tormail.org> wrote: > ... >> The faulting function is lost within crash handler. If you build >> firefox with >> >> # use DEBUG_FLAGS or set STRIP to empty explicitly >> CFLAGS += ${DEBUG_FLAGS} >> DEBUG_FLAGS += -O0 -g >> >> jaeger jit crash would look like >> >> http://lists.freebsd.org/pipermail/freebsd-current/2013-April/041165.html > > The firefox crash in that post was with -O2, so it is most likely not due to > the vectorizer then. > > In any case, I have not been able to reproduce that either. I have browsed > stackoverflow.com for about 5 minutes, clicking a whole bunch of random > articles and links, and no problems whatsoever occurred. That is with the > default www/firefox port, which seems to be the released Firefox 20.0, at its > default settings, on amd64. > > >> It doesn't happen on firefox23 with baseline jit[1] disabled via pref. >> A big change like zones (bug 759585) may have refactored code enough >> to not hit the clang bug. So, try either clang trunk or >> >> http://trillian.chruetertee.ch/freebsd-gecko/changeset/1256/trunk/www/firefox/files/patch-clang33 >> >> The latter pessimizes inlining for clang 3.2 as well. >> >> [1] baseline crashes in a different way >> https://bugzilla.mozilla.org/show_bug.cgi?id=860867 > > I do not like the workaround in that Mozilla bug, since it simply disables > the vectorizer. I can understand that software must always ship tomorrow, > but it would have been nicer to attempt to figure out what is incorrectly > optimized, and why... > > >>> Rebuilding with debugging symbols provides no further insight, as that >>> seems to provide a work-around for whatever the root cause may be >>> (i.e. no more segfaults). >> >> DEBUG enables compile-time diagnostics and strips any -O* from CFLAGS. > > Indeed. To work around this, use the following diff: > > Index: Mk/bsd.port.mk > =================================================================== > --- Mk/bsd.port.mk (revision 316903) > +++ Mk/bsd.port.mk (working copy) > @@ -1580,7 +1580,7 @@ > .if defined(WITH_DEBUG) && !defined(WITHOUT_DEBUG) > STRIP_CMD= ${TRUE} > DEBUG_FLAGS?= -g > -CFLAGS:= ${CFLAGS:N-O*:N-fno-strict*} ${DEBUG_FLAGS} > +CFLAGS:= ${CFLAGS} ${DEBUG_FLAGS} > .endif > > .if defined(NOPORTDOCS) > _______________________________________________ freebsd-ports@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ports To unsubscribe, send any mail to "freebsd-ports-unsubscr...@freebsd.org"