From: Jiri Olsa <jolsa@redhat.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Veronika Kabatova <vkabatov@redhat.com>,
Andrii Nakryiko <andriin@fb.com>,
Alexei Starovoitov <ast@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
bpf <bpf@vger.kernel.org>, "Frank Ch. Eigler" <fche@redhat.com>,
Mark Wielaard <mjw@redhat.com>
Subject: Re: Build failures: unresolved symbol vfs_getattr
Date: Fri, 23 Oct 2020 08:58:32 +0200 [thread overview]
Message-ID: <20201023065832.GA2435078@krava> (raw)
In-Reply-To: <20201023053651.GE2332608@krava>
On Fri, Oct 23, 2020 at 07:36:57AM +0200, Jiri Olsa wrote:
> On Thu, Oct 22, 2020 at 01:00:19PM -0700, Andrii Nakryiko wrote:
>
> SNIP
>
> > >
> > > hi,
> > > FYI there's still no solution yet, so far the progress is:
> > >
> > > the proposed workaround was to use the negation -> we don't have
> > > DW_AT_declaration tag, so let's find out instead which DW_TAG_subprogram
> > > tags have attached code and skip them if they don't have any:
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97060#c10
> > >
> > > the attached patch is doing that, but the resulting BTF is missing
> > > several functions due to another bug in dwarf:
> > > https://bugzilla.redhat.com/show_bug.cgi?id=1890107
> >
> > It seems fine if there are only few functions (especially if those are
> > unlikely to be traced). Do you have an estimate of how many functions
> > have this second DWARF bug?
>
> it wasn't that many, I'll recheck
127 functions missing if the workaround is applied, list attached
jirka
---
'acpi_ev_default_region_setup'
'acpi_ev_pci_bar_region_setup'
'acpi_ex_pci_bar_space_handler'
'acpi_ex_stop_trace_opcode'
'acpi_os_notify_command_complete'
'arch_cpu_idle_exit'
'arch_unregister_hw_breakpoint'
'bfqg_stats_set_start_empty_time'
'bfqg_stats_set_start_idle_time'
'bfqg_stats_update_avg_queue_size'
'bfqg_stats_update_idle_time'
'bfqg_stats_update_io_merged'
'blk_freeze_queue'
'cap_task_setnice'
'cryptd_aead_queued'
'devm_regmap_field_bulk_free'
'disable_nmi_nosync'
'ext4_ext_release'
'fs_param_is_path'
'HUF_isError'
'__ia32_compat_sys_ftruncate'
'__ia32_compat_sys_getsockopt'
'__ia32_compat_sys_io_pgetevents_time32'
'__ia32_compat_sys_preadv64'
'__ia32_compat_sys_process_vm_readv'
'__ia32_compat_sys_process_vm_writev'
'__ia32_compat_sys_pwritev64'
'__ia32_compat_sys_s390_ipc'
'__ia32_compat_sys_setsockopt'
'__ia32_sys_fadvise64'
'__ia32_sys_getegid16'
'__ia32_sys_geteuid16'
'__ia32_sys_getgid16'
'__ia32_sys_getuid16'
'__ia32_sys_inotify_init'
'__ia32_sys_io_pgetevents_time32'
'__ia32_sys_ipc'
'__ia32_sys_munlockall'
'__ia32_sys_old_msgctl'
'__ia32_sys_old_semctl'
'__ia32_sys_old_shmctl'
'__ia32_sys_pciconfig_iobase'
'__ia32_sys_pciconfig_read'
'__ia32_sys_pciconfig_write'
'__ia32_sys_ppoll_time32'
'__ia32_sys_pselect6_time32'
'__ia32_sys_rtas'
'__ia32_sys_s390_ipc'
'__ia32_sys_s390_pci_mmio_read'
'__ia32_sys_s390_pci_mmio_write'
'__ia32_sys_sgetmask'
'__ia32_sys_spu_create'
'__ia32_sys_spu_run'
'__ia32_sys_subpage_prot'
'__ia32_sys_uselib'
'__ia32_sys_vm86'
'__ia32_sys_vm86old'
'ima_post_path_mknod'
'ima_show_template_buf'
'__kfifo_skip_r'
'kstrtol_from_user'
'mdiobus_read_nested'
'mdiobus_write_nested'
'memcpy'
'memmove'
'memset'
'module_arch_freeing_init'
'native_restore_fl'
'native_save_fl'
'netdev_walk_all_lower_dev_rcu'
'notifier_hangup_irq'
'nsecs_to_jiffies'
'of_set_phy_eee_broken'
'param_set_hexint'
'param_set_ullong'
'pcibios_bus_add_device'
'phy_start_machine'
'pmdp_collapse_flush'
'_raw_write_unlock'
'_raw_write_unlock_bh'
'_raw_write_unlock_irq'
'_raw_write_unlock_irqrestore'
'rcu_barrier_tasks_trace'
'rcu_test_sync_prims'
'regmap_field_bulk_free'
'regset_xregset_fpregs_active'
'seq_hlist_next_rcu'
'set_anon_super_fc'
'simple_strtoll'
'sock_no_getname'
'sock_no_sendmsg_locked'
'sock_no_shutdown'
'synchronize_rcu_tasks'
'synchronize_rcu_tasks_rude'
'text_poke_kgdb'
'tty_driver_kref_put'
'watchdog_nmi_start'
'__x64_sys_fadvise64'
'__x64_sys_getegid16'
'__x64_sys_geteuid16'
'__x64_sys_getgid16'
'__x64_sys_getuid16'
'__x64_sys_inotify_init'
'__x64_sys_io_pgetevents_time32'
'__x64_sys_ipc'
'__x64_sys_munlockall'
'__x64_sys_old_msgctl'
'__x64_sys_old_semctl'
'__x64_sys_old_shmctl'
'__x64_sys_pciconfig_iobase'
'__x64_sys_pciconfig_read'
'__x64_sys_pciconfig_write'
'__x64_sys_ppoll_time32'
'__x64_sys_pselect6_time32'
'__x64_sys_rtas'
'__x64_sys_s390_ipc'
'__x64_sys_s390_pci_mmio_read'
'__x64_sys_s390_pci_mmio_write'
'__x64_sys_sgetmask'
'__x64_sys_spu_create'
'__x64_sys_spu_run'
'__x64_sys_subpage_prot'
'__x64_sys_uselib'
'__x64_sys_vm86'
'__x64_sys_vm86old'
'xen_has_pv_nic_devices'
next prev parent reply other threads:[~2020-10-23 6:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1723352278.11013122.1600093319730.JavaMail.zimbra@redhat.com>
2020-09-14 14:48 ` Build failures: unresolved symbol vfs_getattr Veronika Kabatova
2020-09-14 18:25 ` Jiri Olsa
2020-09-14 22:26 ` Andrii Nakryiko
2020-09-15 7:30 ` Jiri Olsa
2020-09-15 12:17 ` Jiri Olsa
2020-09-16 9:06 ` Jiri Olsa
2020-10-16 21:38 ` Jiri Olsa
2020-10-21 19:42 ` Jiri Olsa
2020-10-22 20:00 ` Andrii Nakryiko
2020-10-23 5:36 ` Jiri Olsa
2020-10-23 6:58 ` Jiri Olsa [this message]
2020-10-23 18:22 ` Andrii Nakryiko
2020-10-23 20:17 ` Jiri Olsa
2020-10-23 20:32 ` Andrii Nakryiko
2020-10-23 20:45 ` Jiri Olsa
2020-10-23 22:02 ` Andrii Nakryiko
2020-10-26 10:14 ` Jiri Olsa
2020-10-26 22:06 ` Andrii Nakryiko
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