[Bug documentation/16645] Useless feedback when stap fails

["dsmith at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16645

David Smith <dsmith at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |dsmith at redhat dot com

--- Comment #1 from David Smith <dsmith at redhat dot com> ---
(In reply to Bastien Nocera from comment #0)
> http://sourceware.org/systemtap/SystemTap_Beginners_Guide/using-systemtap.
> html#testing says:
> run the command stap -v -e 'probe vfs.read {printf("read performed\n");
> exit()}'.
> etc.
> 
> Running that command yields:
> $ stap -v -e 'probe vfs.read {printf("read performed\n"); exit()}'
> Using a compile server.
> Unable to find a suitable compile server.
> No servers online to select from.
> Passes: via server ? using 187912virt/3700res/2976shr/660data kb, in
> 0usr/0sys/2007real ms.
> Passes: via server failed.  Try again with another '-v' option.
> 
> I have no idea what that "compile server" is, I just ran this command as a
> normal user that's in the stapusr group (based on the results of an earlier
> failure to run):
> uid=1000(hadess) gid=1000(hadess) groups=1000(hadess),10(wheel),156(stapusr)
> context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
> 
> Shouldn't the "setting up" section of the documentation mention the
> requirements for running systemtap as a normal user for user-space
> intrumentation? I simply couldn't figure it out...

Thanks for reporting this. I'm not sure what is going on here, why systemtap
thinks it needs to use a compile server instead of just compiling locally.

Does this system have secure boot turned on by any chance?

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