From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Yonghong Song <yhs@fb.com>
Cc: "Bill Wendling" <morbo@google.com>,
"Jiri Olsa" <jolsa@kernel.org>,
dwarves@vger.kernel.org, "Alexei Starovoitov" <ast@kernel.org>,
"Andrii Nakryiko" <andrii@kernel.org>, bpf <bpf@vger.kernel.org>,
"David Blaikie" <dblaikie@gmail.com>,
"Fāng-ruì Sòng" <maskray@google.com>,
kernel-team@fb.com, "Nick Desaulniers" <ndesaulniers@google.com>
Subject: Re: [PATCH dwarves 0/2] dwarf_loader: improve cus__merging_cu()
Date: Tue, 6 Apr 2021 14:36:36 -0300 [thread overview]
Message-ID: <YGycJNNI+x98qpR6@kernel.org> (raw)
In-Reply-To: <YGybiA2uSax5+6np@kernel.org>
Em Tue, Apr 06, 2021 at 02:34:01PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Apr 06, 2021 at 10:23:37AM -0700, Yonghong Song escreveu:
> > On 4/6/21 10:03 AM, Arnaldo Carvalho de Melo wrote:
> > > Em Tue, Apr 06, 2021 at 01:59:30PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > Em Tue, Apr 06, 2021 at 01:55:54PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > > Em Tue, Apr 06, 2021 at 01:40:20PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > > > Em Tue, Apr 06, 2021 at 10:22:37AM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > > > > I'm seeing these here:
> > > > >
> > > > > > > [acme@five bpf]$ rm -f ../build/bpf_clang_thin_lto/*vmlinu*
> > > > > > > [acme@five bpf]$ time make -j28 LLVM=1 LLVM_IAS=1 O=../build/bpf_clang_thin_lto/ vmlinux
> > > > > > > make[1]: Entering directory '/home/acme/git/build/bpf_clang_thin_lto'
> > > > > > > GEN Makefile
> > > > > > > DESCEND objtool
> > > > > > > DESCEND bpf/resolve_btfids
> > > > > > > CALL /home/acme/git/bpf/scripts/atomic/check-atomics.sh
> > > > > > > CALL /home/acme/git/bpf/scripts/checksyscalls.sh
> > > > > > > CHK include/generated/compile.h
> > > > > > > GEN .version
> > > > > > > CHK include/generated/compile.h
> > > > > > > UPD include/generated/compile.h
> > > > > > > CC init/version.o
> > > > > > > AR init/built-in.a
> > > > > > > GEN .tmp_initcalls.lds
> > > > > > > LTO vmlinux.o
> > > > > > > OBJTOOL vmlinux.o
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_init_avx_gen2()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_enc_update_avx_gen2()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_dec_update_avx_gen2()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_finalize_avx_gen2()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_init_avx_gen4()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_enc_update_avx_gen4()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_dec_update_avx_gen4()+0x12: unsupported stack pointer realignment
> > > > > > > vmlinux.o: warning: objtool: aesni_gcm_finalize_avx_gen4()+0x12: unsupported stack pointer realignment
> > > > > > > MODPOST vmlinux.symvers
> > > > > > > MODINFO modules.builtin.modinfo
> > > > > > > GEN modules.builtin
> > > > > > > LD .tmp_vmlinux.btf
> > > > > > > BTF .btf.vmlinux.bin.o
> > > > > > > LD .tmp_vmlinux.kallsyms1
> > > > > > > KSYMS .tmp_vmlinux.kallsyms1.S
> > > > > > > AS .tmp_vmlinux.kallsyms1.S
> > > > > > > LD .tmp_vmlinux.kallsyms2
> > > > > > > KSYMS .tmp_vmlinux.kallsyms2.S
> > > > > > > AS .tmp_vmlinux.kallsyms2.S
> > > > > > > LD vmlinux
> > > > > > > BTFIDS vmlinux
> > > > > > > WARN: multiple IDs found for 'inode': 232, 28822 - using 232
> > > > > > > WARN: multiple IDs found for 'file': 374, 28855 - using 374
> > > > > > > WARN: multiple IDs found for 'path': 379, 28856 - using 379
> > > > > > > WARN: multiple IDs found for 'vm_area_struct': 177, 28929 - using 177
> > > > > > > WARN: multiple IDs found for 'task_struct': 97, 28966 - using 97
> > > > > > > WARN: multiple IDs found for 'seq_file': 510, 29059 - using 510
> > > > > > > WARN: multiple IDs found for 'inode': 232, 29345 - using 232
> > > > > > > WARN: multiple IDs found for 'file': 374, 29429 - using 374
> > > > > > > WARN: multiple IDs found for 'path': 379, 29430 - using 379
> > > > > > > WARN: multiple IDs found for 'vm_area_struct': 177, 29471 - using 177
> > > > > > > WARN: multiple IDs found for 'task_struct': 97, 29481 - using 97
> > > > > > > WARN: multiple IDs found for 'seq_file': 510, 29512 - using 510
> > > > > > > SORTTAB vmlinux
> > > > > > > SYSMAP System.map
> > > > > > > make[1]: Leaving directory '/home/acme/git/build/bpf_clang_thin_lto'
> > > > > > >
> > > > > > > [acme@five pahole]$ clang -v
> > > > > > > clang version 11.0.0 (Fedora 11.0.0-2.fc33)
> >
> > This could be due to the compiler. The clang 11 is used here. Sedat is
> > using clang 12 and didn't see warnings and I am using clang dev branch
Cool, clang 12 is the one in Fedora 34 beta.
- Arnaldo
> > (clang 13) and didn't see warnings either. clang 11 could generate
> > some debuginfo where pahole didn't handle it properly.
> >
> > I tried to build locally with clang 11 but it crashed as I enabled
> > assert during compiler build. Will try a little bit more.
>
> Right, I'm now at:
>
> $ git clone https://github.com/llvm/llvm-project.git
> $ cmake -DLLVM_ENABLE_PROJECTS=clang -G "Unix Makefiles" ../llvm
next prev parent reply other threads:[~2021-04-06 17:36 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 2:58 [PATCH dwarves 0/2] dwarf_loader: improve cus__merging_cu() Yonghong Song
2021-04-01 2:58 ` [PATCH dwarves 1/2] dwarf_loader: check .debug_abbrev for cross-cu references Yonghong Song
2021-04-01 18:52 ` Nick Desaulniers
2021-04-01 19:36 ` Arnaldo
2021-04-01 20:54 ` Yonghong Song
2021-04-01 2:58 ` [PATCH dwarves 2/2] dwarf_loader: check .notes section for lto build info Yonghong Song
2021-04-01 12:59 ` [PATCH dwarves 0/2] dwarf_loader: improve cus__merging_cu() Arnaldo Carvalho de Melo
2021-04-01 18:50 ` Nick Desaulniers
2021-04-01 19:35 ` Bill Wendling
2021-04-01 20:56 ` Bill Wendling
2021-04-01 21:59 ` Yonghong Song
2021-04-02 19:44 ` Bill Wendling
2021-04-06 13:22 ` Arnaldo Carvalho de Melo
2021-04-06 13:23 ` Arnaldo Carvalho de Melo
2021-04-06 16:40 ` Arnaldo Carvalho de Melo
2021-04-06 16:55 ` Arnaldo Carvalho de Melo
2021-04-06 16:59 ` Arnaldo Carvalho de Melo
2021-04-06 17:03 ` Arnaldo Carvalho de Melo
2021-04-06 17:07 ` Arnaldo Carvalho de Melo
2021-04-06 17:25 ` Arnaldo Carvalho de Melo
2021-04-06 17:23 ` Yonghong Song
2021-04-06 17:34 ` Arnaldo Carvalho de Melo
2021-04-06 17:36 ` Arnaldo Carvalho de Melo [this message]
2021-04-06 17:48 ` Yonghong Song
2021-04-06 18:03 ` Arnaldo Carvalho de Melo
2021-04-06 18:04 ` Arnaldo Carvalho de Melo
2021-04-06 18:31 ` Nick Desaulniers
2021-04-06 18:17 ` David Blaikie
2021-04-06 18:20 ` Arnaldo Carvalho de Melo
2021-04-06 18:22 ` Fāng-ruì Sòng
2021-04-06 17:09 ` Jiri Olsa
2021-04-02 13:27 ` Arnaldo Carvalho de Melo
2021-04-02 14:34 ` Yonghong Song
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