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
jirka
---
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 32e573943cf0..05ac3ced89e7 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -125,7 +125,7 @@ gen_btf()
vmlinux_link ${1}
info "BTF" ${2}
- LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -J ${PAHOLE_FLAGS} ${1}
+ LLVM_OBJCOPY="${OBJCOPY}" ${PAHOLE} -V -J ${PAHOLE_FLAGS} ${1}
# Create ${2} which contains just .BTF section but no symbols. Add
# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
