Date: Mon, 04 Mar 2013 13:15:23 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Matt Burke <mattblists@icritical.com> Cc: freebsd-hackers@FreeBSD.org Subject: Re: clang generated code sometimes confuses fbt Message-ID: <5134824B.3000301@FreeBSD.org> In-Reply-To: <513453D4.4010305@icritical.com> References: <5132387E.8010808@FreeBSD.org> <513453D4.4010305@icritical.com>
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on 04/03/2013 09:57 Matt Burke said the following: > On 03/02/13 17:35, Andriy Gapon wrote: > >> To summarize: I would be glad of either clang generated code was >> "fbt-friendly" or if ctf information was generated for >> bpobj_iterate_impl. Either is perfect for me. > > Apologies if this is a silly suggestion, Apologies, but yes, it is :-) > but are you building with -O0? > I've noticed backtraces being hard to follow (i.e. skipping intermediate > and wrapper functions) with a kernel built with the default optimisation > level, and it seems to me that the same thing may be happening here - the > wrappers are being optimised out. > If they were optimized out, then I wouldn't be able to provide their disassembly in my original email, would I? -- Andriy Gapon
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