On 1/24/23 00:13, Daniel Xu wrote:
Hi Jiri,
On Mon, Jan 23, 2023, at 1:06 AM, Jiri Olsa wrote:
On Sun, Jan 22, 2023 at 10:48:44AM -0700, Daniel Xu wrote:
Hi,
I'm getting the following error during build:
$ ./tools/testing/selftests/bpf/vmtest.sh -j30
[...]
BTF .btf.vmlinux.bin.o
btf_encoder__encode: btf__dedup failed!
Failed to encode BTF
LD .tmp_vmlinux.kallsyms1
NM .tmp_vmlinux.kallsyms1.syms
KSYMS .tmp_vmlinux.kallsyms1.S
AS .tmp_vmlinux.kallsyms1.S
LD .tmp_vmlinux.kallsyms2
NM .tmp_vmlinux.kallsyms2.syms
KSYMS .tmp_vmlinux.kallsyms2.S
AS .tmp_vmlinux.kallsyms2.S
LD .tmp_vmlinux.kallsyms3
NM .tmp_vmlinux.kallsyms3.syms
KSYMS .tmp_vmlinux.kallsyms3.S
AS .tmp_vmlinux.kallsyms3.S
LD vmlinux
BTFIDS vmlinux
FAILED: load BTF from vmlinux: No such file or directory
make[1]: *** [scripts/Makefile.vmlinux:35: vmlinux] Error 255
make[1]: *** Deleting file 'vmlinux'
make: *** [Makefile:1264: vmlinux] Error 2
This happens on both bpf-next/master (84150795a49) and 6.2-rc5
(2241ab53cb).
I've also tried arch linux pahole 1:1.24+r29+g02d67c5-1 as well as
upstream pahole on master (02d67c5176) and upstream pahole on
next (2ca56f4c6f659).
Of the above 6 combinations, I think I've tried all of them (maybe
missing 1 or 2).
Looks like GCC got updated recently on my machine, so perhaps
it's related?
CONFIG_CC_VERSION_TEXT="gcc (GCC) 12.2.1 20230111"
I'll try some debugging, but just wanted to report it first.
hi,
I can't reproduce that.. can you reproduce it outside vmtest.sh?
there will be lot of output with patch below, but could contain
some more error output
Thanks for the hints. Doing a regular build outside of vmtest.sh
seems to work ok. So maybe it's a difference in the build config.
I'll put a little more time into debugging to see if it goes anywhere.
But I'll have to get back to the regularly scheduled programming
soon.
6.2-rc5 compiles correctly when CONFIG_X86_KERNEL_IBT is commented but
fails in pahole when CONFIG_X86_KERNEL_IBT is set.
Thanks,
--
Alexandre Peixoto Ferreira
