+ Arnaldo and dwarves list On Wed, Dec 20, 2023 at 03:24:54PM +0800, Yujie Liu wrote: > On Tue, Dec 19, 2023 at 02:04:54PM -0700, Nathan Chancellor wrote: > > On Tue, Dec 19, 2023 at 12:58:28PM -0800, Nick Desaulniers wrote: > > > On Tue, Dec 19, 2023 at 12:54 PM Kent Overstreet > > > <kent.overstreet@xxxxxxxxx> wrote: > > > > > > > > On Tue, Dec 19, 2023 at 09:40:09PM +0800, kernel test robot wrote: > > > > > tree: https://evilpiepirate.org/git/bcachefs.git header_cleanup > > > > > head: 89188fceb7a49e3c4b0578d86f6f6e647f202821 > > > > > commit: 1db61740aeb7d6b1c7bfb2a98708a65a6679d068 [21/51] locking/seqlock: Split out seqlock_types.h > > > > > config: hexagon-randconfig-r005-20220913 (https://download.01.org/0day-ci/archive/20231219/202312192107.wMIKiZWw-lkp@xxxxxxxxx/config) > > > > > compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) > > > > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231219/202312192107.wMIKiZWw-lkp@xxxxxxxxx/reproduce) > > > > > > > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > > > > > the same patch/commit), kindly add following tags > > > > > | Reported-by: kernel test robot <lkp@xxxxxxxxx> > > > > > | Closes: https://lore.kernel.org/oe-kbuild-all/202312192107.wMIKiZWw-lkp@xxxxxxxxx/ > > > > > > > > > > All errors (new ones prefixed by >>): > > > > > > > > > > die__process_unit: DW_TAG_member (0xd) @ <0xc689> not handled! > > > > > die__process_unit: tag not supported 0xd (member)! > > > > > die__process_function: DW_TAG_compile_unit (0x11) @ <0xc697> not handled! > > > > > die__process_function: tag not supported 0x11 (compile_unit)! > > > > > die__process_function: DW_TAG_member (0xd) @ <0xc6db> not handled! > > > > > die__process_function: DW_TAG_compile_unit (0x11) @ <0xc6e5> not handled! > > > > > die__process_class: DW_TAG_compile_unit (0x11) @ <0xc778> not handled! > > > > > namespace__recode_dwarf_types: couldn't find 0xc689 type for 0xc66b (member)! > > > > > namespace__recode_dwarf_types: couldn't find 0xc638 type for 0xc674 (member)! > > > > > namespace__recode_dwarf_types: couldn't find 0xc638 type for 0xc67e (member)! > > > > > >> /bin/bash: line 1: 19420 Segmentation fault LLVM_OBJCOPY="llvm-objcopy" pahole -J --btf_gen_floats -j --lang_exclude=rust --skip_encoding_btf_inconsistent_proto --btf_gen_optimized --btf_base vmlinux drivers/misc/eeprom/at24.ko > > > > > > > > Not sure how likely a header cleanup is to cause a segfault in > > > > llvm-objcopy and I don't have the toolchain to repro this - could > > > > hexagon people take a look? > > > > For what it's worth in case you were not aware, I provide copies of LLVM > > on kernel.org that can be installed in some prefix and invoked with > > LLVM=<prefix>/bin/, which can make reproducing reports such as these > > relatively easy. > > > > https://mirrors.edge.kernel.org/pub/tools/llvm/ > > > > > Is it a segfault in llvm-objcopy, or pahole? > > > > Should be pahole. I have not been able to reproduce these crashes in > > pahole v1.25 in the past when they come up every so often. 0day folks, > > what version of pahole are you testing with? > > We clone pahole source code from [1] and build it on the master branch. > The current head is commit c129fa757948 which is newer than v1.25. > > c129fa757948 ("pahole: Add --btf_features_strict to reject unknown BTF features") > > [1] https://git.kernel.org/pub/scm/devel/pahole/pahole.git Thanks for that additional information but I can reproduce this at v1.25 as well, I just tried: $ git fetch https://evilpiepirate.org/git/bcachefs.git 1db61740aeb7d6b1c7bfb2a98708a65a6679d068 $ git reset --hard FETCH_HEAD $ curl -LSso .config https://download.01.org/0day-ci/archive/20231219/202312192107.wMIKiZWw-lkp@xxxxxxxxx/config $ curl -LSs https://mirrors.edge.kernel.org/pub/tools/llvm/files/llvm-16.0.6-x86_64.tar.xz | tar -xJf - $ make -skj"$(nproc)" ARCH=hexagon LLVM=$PWD/llvm-16.0.6-x86_64/bin/ olddefconfig all ... die__process: got compile_unit unexpected tag after DW_TAG_compile_unit! die__create_new_enumeration: DW_TAG_array_type (0x1) @ <0x120b1> not handled! die__create_new_enumeration: DW_TAG_pointer_type (0xf) @ <0x120b7> not handled! die__process_unit: DW_TAG_member (0xd) @ <0x3669> not handled! die__process_unit: tag not supported 0xd (member)! die__process: got compile_unit unexpected tag after DW_TAG_compile_unit! die__process_unit: DW_TAG_member (0xd) @ <0x3650> not handled! die__process_unit: tag not supported 0xd (member)! die__process: got compile_unit unexpected tag after DW_TAG_compile_unit! die__create_new_enumeration: DW_TAG_array_type (0x1) @ <0x9cb5> not handled! die__create_new_enumeration: DW_TAG_pointer_type (0xf) @ <0x9cbb> not handled! die__process_unit: DW_TAG_enumerator (0x28) @ <0x705a> not handled! die__process_unit: tag not supported 0x28 (enumerator)! ... I do not get a segfault personally but there are definitely a lot of errors from pahole at the end. Arnaldo, is pahole not handling something that it should with regards to clang's debug info? Cheers, Nathan
