Date: Tue, 30 Nov 2021 15:00:37 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Mark Johnston <markj@freebsd.org> Cc: FreeBSD Current <current@freebsd.org> Subject: Re: ctfconvert: rc = 1 Unsupported version [_dwarf_info_load(229)] Message-ID: <d9b5c7b7-aa3a-db4e-387c-fb26fdba9082@FreeBSD.org> In-Reply-To: <da801e7b-a32b-e43e-cd2d-da796055aff2@FreeBSD.org> References: <cba74929-19d6-3d29-6288-feeef3127577@FreeBSD.org> <YaEF8VJWht%2BFcI1t@nuc> <e5cbcdd8-ea9e-fe60-4c0b-7b02882d6689@FreeBSD.org> <YaEuyyr5mQoroMiE@nuc> <YaE584vhhhepxuUW@nuc> <da801e7b-a32b-e43e-cd2d-da796055aff2@FreeBSD.org>
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On 27/11/2021 10:42, Andriy Gapon wrote: > On 26/11/2021 21:48, Mark Johnston wrote: >> On Fri, Nov 26, 2021 at 02:00:27PM -0500, Mark Johnston wrote: >>> Thanks, I can reproduce it now. >>> >>> Our libdwarf is complaining that the first compilation unit header in >>> .debug_info contains an unsupported DWARF version number (libdwarf only >>> supports 2, 3 and 4). In files compiled by clang it ends up being zero. >>> For instance, compiling bin/cat and dumping the .debug_info section: >>> >>> gcc10: >>> c1250000 04000000 00000801 00000000 >>> ^ DWARF version >>> clang: >>> 01000000 00000000 4e230000 00000000 >>> >>> llvm-dwarfdump and binutils readelf are somehow still able to find a >>> valid-looking unit header, but I haven't yet been able to figure out how >>> they do that from reading the DWARF 4/5 specs or the LLVM sources. >> |Ah, we recently started configuring clang to compress debug sections by >> default, and our libdwarf doesn't know how to handle that. As an interim >> workaround this could simply be disabled with WITH_CTF is configured: > > Oh wow, you were very fast at figuring this out. > Thank you very much! > > I'll give the build change a whirl first and then test D33139 a bit later. Tested both (individually) and both do the job just as expected. -- Andriy Gapon
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