Re: perf seg fault

Adrian Hunter
2020-05-12T14:58:14Z

Forgot to cc mailing list

On 12/05/20 5:50 pm, Adrian Hunter wrote:
> Hi
>
> I am getting a seg fault from your perf/core branch, as follows:
>
> # perf record uname
> Linux
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.005 MB perf.data (7 samples) ]
> perf: Segmentation fault
> Obtained 6 stack frames.
> [0x4e75b4]
> [0x5d1ad0]
> [0x5c9860]
> [0x4a6e5c]
> [0x5cb39b]
> [0x76c89f]
> Segmentation fault
>
> It goes away with --no-bpf-event:
>
> # perf record --no-bpf-event uname
> Linux
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.005 MB perf.data (7 samples) ]
> #
>
> kernel is from the same branch
>
> # uname -a
> Linux buildroot 5.7.0-rc2-00028-g0fdddf5a583a #165 SMP Tue May 12 16:27:53
> EEST 2020 x86_64 GNU/Linux
>
> # perf version --build-options
> perf version 5.6.g0fdddf5a583a
> dwarf: [ OFF ] # HAVE_DWARF_SUPPORT
> dwarf_getlocations: [ OFF ] # HAVE_DWARF_GETLOCATIONS_SUPPORT
> glibc: [ on ] # HAVE_GLIBC_SUPPORT
> gtk2: [ OFF ] # HAVE_GTK2_SUPPORT
> syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT
> libbfd: [ on ] # HAVE_LIBBFD_SUPPORT
> libelf: [ on ] # HAVE_LIBELF_SUPPORT
> libnuma: [ OFF ] # HAVE_LIBNUMA_SUPPORT
> numa_num_possible_cpus: [ OFF ] # HAVE_LIBNUMA_SUPPORT
> libperl: [ OFF ] # HAVE_LIBPERL_SUPPORT
> libpython: [ OFF ] # HAVE_LIBPYTHON_SUPPORT
> libslang: [ on ] # HAVE_SLANG_SUPPORT
> libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT
> libunwind: [ OFF ] # HAVE_LIBUNWIND_SUPPORT
> libdw-dwarf-unwind: [ OFF ] # HAVE_DWARF_SUPPORT
> zlib: [ OFF ] # HAVE_ZLIB_SUPPORT
> lzma: [ OFF ] # HAVE_LZMA_SUPPORT
> get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT
> bpf: [ OFF ] # HAVE_LIBBPF_SUPPORT
> aio: [ on ] # HAVE_AIO_SUPPORT
> zstd: [ OFF ] # HAVE_ZSTD_SUPPORT
>
>
> Any thoughts?
>
> Regards
> Adrian
>
>