Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <CA+icZUVQSojGgnis8Ds5GW-7-PVMZ2w4X5nQKSSkBPf-29NS6Q@mail.gmail.com>
 <20210205211010.2764627-1-ndesaulniers@google.com> <CA+icZUXkCC9U3PsYzqhzu7BZa-eE2kd53SfX2ODrr+N=QO6VvQ@mail.gmail.com>
In-Reply-To: <CA+icZUXkCC9U3PsYzqhzu7BZa-eE2kd53SfX2ODrr+N=QO6VvQ@mail.gmail.com>
From:   Nick Desaulniers <ndesaulniers@google.com>
Date:   Fri, 5 Feb 2021 13:40:05 -0800
Message-ID: <CAKwvOd=ktdttx5E=_k7B-WuJsic3imOecTUDyaQA9VUpLF45Jw@mail.gmail.com>
Subject: Re: ERROR: INT DW_ATE_unsigned_1 Error emitting BTF type
To:     Sedat Dilek <sedat.dilek@gmail.com>
Cc:     Andrii Nakryiko <andriin@fb.com>, arnaldo.melo@gmail.com,
        berrange@redhat.com, bpf <bpf@vger.kernel.org>, cavok@debian.org,
        dwarves@vger.kernel.org, jengelh@inai.de,
        Jiri Olsa <jolsa@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Mark Wielaard <mjw@redhat.com>,
        Ondrej Mosnacek <omosnace@redhat.com>, paul@paul-moore.com,
        Tom Stellard <tstellar@redhat.com>, Yonghong Song <yhs@fb.com>,
        zzam@gentoo.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Fri, Feb 5, 2021 at 1:17 PM Sedat Dilek <sedat.dilek@gmail.com> wrote:
>
> On Fri, Feb 5, 2021 at 10:10 PM Nick Desaulniers
> <ndesaulniers@google.com> wrote:
> >
> > > Hi,
> > >
> > > when building with pahole v1.20 and binutils v2.35.2 plus Clang
> > > v12.0.0-rc1 and DWARF-v5 I see:
> > > ...
> > > + info BTF .btf.vmlinux.bin.o
> > > + [  != silent_ ]
> > > + printf   %-7s %s\n BTF .btf.vmlinux.bin.o
> > >  BTF     .btf.vmlinux.bin.o
> > > + LLVM_OBJCOPY=/opt/binutils/bin/objcopy /opt/pahole/bin/pahole -J
> > > .tmp_vmlinux.btf
> > > [115] INT DW_ATE_unsigned_1 Error emitting BTF type
> > > Encountered error while encoding BTF.
> >
> > Yes, I observe this error, too.
> >
> > https://gist.github.com/nickdesaulniers/ae8c9efbe4da69b1cf0dce138c1d2781
> >
> > via v9 of my DWARF v5 series, which should help make this easier to
> > reproduce:
> > https://lore.kernel.org/lkml/CA+icZUW3sg_PkbmKSFMs6EqwQV7=hvKuAgZSsbg=Qr6gTs7RbQ@mail.gmail.com/T/#m45ec7e6df4c4b5e9da034b95d7dfc8e2a0c81dac
>
> Thanks Nick for confirming the error.
>
> Ah, I see you passed:
>
> make LLVM=1 LLVM_IAS=1 ...
>
> Can you by chance try with KCFLAGS="-fbinutils-version=2.35"?

$ PATH=/path/to/tot/pahole/build:$PATH make LLVM=1 LLVM_IAS=1 -j72
KCFLAGS="-fbinutils-version=2.35"
...
  BTF     .btf.vmlinux.bin.o
[12919] INT DW_ATE_unsigned_1 Error emitting BTF type
Encountered error while encoding BTF.
...
  LD      vmlinux
  BTFIDS  vmlinux
FAILED: load BTF from vmlinux: Invalid argument
-- 
Thanks,
~Nick Desaulniers