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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/51921] [4.6/4.7 regression] EH unwinding support is broken Date: Tue, 07 Feb 2012 17:30:00 -0000 [thread overview] Message-ID: <bug-51921-4-T7PVcI9caU@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-51921-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51921 --- Comment #5 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2012-02-07 17:29:37 UTC --- > --- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-02-07 17:12:26 UTC --- >> I'm quite upset about this because the only reason for that reversion >> he's given so far is a failure (I wouldn't call it regression) on a >> 7-year-old Solaris 10 beta release (or rather, one of many two-weekly >> builds). AFAICT, no released version is affected by my rewrite of >> sparc/sol2-unwind.h, which introduced Solaris 11 support before 4.6.0, >> which is now completely broken. > > If you give me a proof that no released version whatsoever, from the very first > Solaris 8 to the very latest Solaris 10, can be affected by a regression due to > the rewrite of the pattern matching code, then I'd (reluctantly) accept the > breakage for the Solaris 10 beta. You know perfectly well that such a proof is practically impossible: that would mean updating a machine through every single Solaris 8/9/10 kernel/libc/libthread patch ever released. The other way round, I'd claim that you cannot prove that the old code works for every since such combination either. >> * If some AdaCore customer couldn't be bothered to upgrade to a release >> (I'm talking about any release here, not supported or latest) version >> of Solaris in 7 years, but needs to run bleeding-edge versions of GCC, >> I declare that AdaCore's problem, not mine. If the only ill effect of >> a patch of mine is to break such ancient beta versions (not >> intentionally or lightly), so be it. I'm not jumping through hoops to >> fix that. > > Let's not misrepresent things, please. Enhancing the existing pattern matching > code is trivial: you find the first differing frame in the stack, and you add a > new 'else if' somewhere. You claimed that before, and that's what I tried at first to make Solaris 11 work, but failed completely. > Again, this pattern matching code is at least one decade old and went through > many Solaris versions, so rewriting it from scratch was a wrong decision. Why didn't you object then when it was submitted *and accepted*, has been in for almost a year, been shipped with a release, and revert it shortly before the next release? Rainer
next prev parent reply other threads:[~2012-02-07 17:30 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-01-20 18:37 [Bug target/51921] New: [4.7 regression] EH unwinding support is broken on Solaris 11 ro at gcc dot gnu.org 2012-01-20 19:32 ` [Bug target/51921] [4.6/4.7 regression] EH unwinding support is broken ebotcazou at gcc dot gnu.org 2012-02-07 15:38 ` rguenth at gcc dot gnu.org 2012-02-07 16:59 ` ro at CeBiTec dot Uni-Bielefeld.DE 2012-02-07 17:12 ` ebotcazou at gcc dot gnu.org 2012-02-07 17:30 ` ro at CeBiTec dot Uni-Bielefeld.DE [this message] 2012-02-07 17:55 ` ebotcazou at gcc dot gnu.org 2012-02-08 10:45 ` rguenth at gcc dot gnu.org 2012-02-08 18:04 ` ro at gcc dot gnu.org 2012-02-08 18:11 ` ro at CeBiTec dot Uni-Bielefeld.DE 2012-02-10 23:35 ` pinskia at gcc dot gnu.org 2012-02-10 23:37 ` pinskia at gcc dot gnu.org 2012-02-11 0:10 ` ian at airs dot com 2012-02-11 10:51 ` ebotcazou at gcc dot gnu.org 2012-02-15 8:18 ` ebotcazou at gcc dot gnu.org 2012-02-15 8:19 ` ebotcazou at gcc dot gnu.org 2012-02-15 8:19 ` ebotcazou at gcc dot gnu.org
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