Hi Jiri & Alexandre, On Fri, Jan 27, 2023, at 5:00 PM, Jiri Olsa wrote: > On Fri, Jan 27, 2023 at 04:28:54PM -0600, Alexandre Peixoto Ferreira wrote: >> >> >> 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. > > could you plese attach your config and the build error? > I can't reproduce that I've confirmed that CONFIG_X86_KERNEL_IBT=n fixes my issue as well. Here is the config that produces my originally reported error: https://pastes.dxuuu.xyz/wlg9tb Thanks, Daniel
