Messages in this thread | | | From | Arnaldo Carvalho de Melo <> | Date | Tue, 12 May 2020 12:41:25 -0300 | Subject | Re: perf seg fault |
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Em Tue, May 12, 2020 at 05:10:43PM +0200, Jiri Olsa escreveu: > On Tue, May 12, 2020 at 05:58:29PM +0300, Adrian Hunter wrote: > > 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
Humm, maybe this?
make -C tools clean rm -rf /tmp/build/perf mkdir -p /tmp/build/perf make -C tools/perf O=/tmp/build/perf install-bin
[root@five ~]# perf -vv perf version 5.7.rc2.g2dbd8814c26b dwarf: [ on ] # HAVE_DWARF_SUPPORT dwarf_getlocations: [ on ] # HAVE_DWARF_GETLOCATIONS_SUPPORT glibc: [ on ] # HAVE_GLIBC_SUPPORT gtk2: [ on ] # HAVE_GTK2_SUPPORT syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT libbfd: [ on ] # HAVE_LIBBFD_SUPPORT libelf: [ on ] # HAVE_LIBELF_SUPPORT libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT libperl: [ on ] # HAVE_LIBPERL_SUPPORT libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT libslang: [ on ] # HAVE_SLANG_SUPPORT libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT libunwind: [ on ] # HAVE_LIBUNWIND_SUPPORT libdw-dwarf-unwind: [ on ] # HAVE_DWARF_SUPPORT zlib: [ on ] # HAVE_ZLIB_SUPPORT lzma: [ on ] # HAVE_LZMA_SUPPORT get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT bpf: [ OFF ] # HAVE_LIBBPF_SUPPORT aio: [ on ] # HAVE_AIO_SUPPORT zstd: [ on ] # HAVE_ZSTD_SUPPORT [root@five ~]# perf record uname Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.029 MB perf.data (7 samples) ] perf: Segmentation fault Obtained 6 stack frames. perf(sighandler_dump_stack+0x3e) [0x4fc7be] /lib64/libc.so.6(+0x3c6af) [0x7f073b8a16af] perf(perf_mmap__read_init+0x20) [0x5d9570] perf() [0x4c7758] /lib64/libpthread.so.0(+0x94e1) [0x7f073c28a4e1] /lib64/libc.so.6(clone+0x42) [0x7f073b9666a2] Segmentation fault (core dumped) [root@five ~]#
?
> > > aio: [ on ] # HAVE_AIO_SUPPORT > > > zstd: [ OFF ] # HAVE_ZSTD_SUPPORT > > > > > > > > > Any thoughts? > > hum, I don't see that, do you reproduce with DEBUG=1? > to get more verbose backtrace
[root@five ~]# uname -a Linux five 5.7.0-rc2 #1 SMP Tue Apr 21 11:06:25 -03 2020 x86_64 x86_64 x86_64 GNU/Linux [root@five ~]# perf record uname Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.030 MB perf.data (7 samples) ] [root@five ~]# uname -a Linux five 5.7.0-rc2 #1 SMP Tue Apr 21 11:06:25 -03 2020 x86_64 x86_64 x86_64 GNU/Linux [root@five ~]#
[root@five ~]# uname -a Linux five 5.7.0-rc2 #1 SMP Tue Apr 21 11:06:25 -03 2020 x86_64 x86_64 x86_64 GNU/Linux [root@five ~]# perf -vv perf version 5.7.rc2.g2dbd8814c26b dwarf: [ on ] # HAVE_DWARF_SUPPORT dwarf_getlocations: [ on ] # HAVE_DWARF_GETLOCATIONS_SUPPORT glibc: [ on ] # HAVE_GLIBC_SUPPORT gtk2: [ on ] # HAVE_GTK2_SUPPORT syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT libbfd: [ on ] # HAVE_LIBBFD_SUPPORT libelf: [ on ] # HAVE_LIBELF_SUPPORT libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT libperl: [ on ] # HAVE_LIBPERL_SUPPORT libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT libslang: [ on ] # HAVE_SLANG_SUPPORT libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT libunwind: [ on ] # HAVE_LIBUNWIND_SUPPORT libdw-dwarf-unwind: [ on ] # HAVE_DWARF_SUPPORT zlib: [ on ] # HAVE_ZLIB_SUPPORT lzma: [ on ] # HAVE_LZMA_SUPPORT get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT bpf: [ on ] # HAVE_LIBBPF_SUPPORT aio: [ on ] # HAVE_AIO_SUPPORT zstd: [ on ] # HAVE_ZSTD_SUPPORT [root@five ~]#
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