Re: Not able to get valgrind profiling output after starting systemd-udevd.service through valgrind.

[Amit anand <amit.table@xxxxxxxxx>]

Hi,

Tried to run debug-symbol enabled systemd-udevd through valgrind.

root@[xxx]:/var/opt# vi  /etc/systemd/system/.../systemd-udevd.service
ExecStart=/usr/bin/valgrind --tool=memcheck /lib/systemd/.debug/systemd-udevd  // Modified to run debug-symbol enabled systemd.udevd binary through valgrind.
root@[xxx]:/var/opt# systemctl daemon-reload

Not able to run debug-symbol enabled systemd-udevd through valgrind. 

Below error message:

root@[xxx]:/var/opt# systemctl restart systemd-udevd
Job for systemd-udevd.service failed because the control process exited with error code.
See "systemctl status systemd-udevd.service" and "journalctl -xe" for details

systemctl status -n1000 systemd-udevd.service
[[0;1;31m●[[0m systemd-udevd.service - udev Kernel Device Manager
   Loaded: loaded (/lib/systemd/system/systemd-udevd.service; enabled; vendor preset: enabled)
   Active: [[0;1;31mfailed[[0m (Result: exit-code) since Tue 2020-04-21 16:27:16 UTC; 40s ago
     Docs: man:systemd-udevd.service(8)
           man:udev(7)
  Process: 4252 ExecStart=/usr/bin/valgrind --tool=memcheck /lib/systemd/.debug/systemd-udevd [[0;1;31m(code=exited, status=1/FAILURE)[[0m
 Main PID: 4252 (code=exited, status=1/FAILURE)

Apr 21 16:27:16 [xxx] valgrind[4252]: valgrind: m_ume.c: can't open interpreter
Apr 21 16:27:16 [xxx] systemd[1]: [[0;1;39m[[0;1;31m[[0;1;39msystemd-udevd.service: Failed with result 'exit-code'.[[0m
Apr 21 16:27:16 [xxx] systemd[1]: [[0;1;31m[[0;1;39m[[0;1;31mFailed to start udev Kernel Device Manager.[[0m

 Kindly let me know if anything missed.

Regards,

Amit

On Thu, Apr 16, 2020 at 7:26 PM Lennart Poettering <mzerqung@xxxxxxxxxxx> wrote:

On Di, 14.04.20 20:00, Amit anand (amit.table@xxxxxxxxx) wrote:

> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x4012BD1: ???
> (in /lib/ld-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x5BFCC8B:
> _dl_catch_exception (in /lib/libc-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x4012789: ???
> (in /lib/ld-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x5BFC2DC: ???
> (in /lib/libc-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x5BFCC8B:
> _dl_catch_exception (in /lib/libc-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x5BFCCFE:
> _dl_catch_error (in /lib/libc-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x5BFC3A6: ???
> (in /lib/libc-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==    by 0x5BFC436:
> __libc_dlopen_mode (in /lib/libc-2.27.so)
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==  Address 0x650b1c0 is
> 16 bytes after a block of size 32 in arena "client"
> Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179==

To be truly useful you need to enable debug symbols in your builds, so
that valgrind can show you something for useful than pointer values.

Lennart

--
Lennart Poettering, Berlin

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