Re: Issue in man page sprof.1

[Florian Weimer <fweimer@redhat.com>]

* Helge Kreutzmann:

> Hello Florian,
> Am Sun, Nov 17, 2024 at 11:50:18PM +0100 schrieb Florian Weimer:
>> * Alejandro Colomar:
>> 
>> > Hi Helge,
>> >
>> > On Sun, Nov 17, 2024 at 10:46:23AM GMT, Helge Kreutzmann wrote:
>> >> Without further ado, the following was found:
>> >> 
>> >> Issue:    Inconsistency detected by ld.so: dl-open.c: 930: _dl_open: Assertion `_dl_debug_update (args.nsid)->r_state == RT_CONSISTENT' failed!
>> >
>> > IIUC, this report is that running the example shell session resulted in
>> > that problem.  I've CCed glibc in case they can help.
>> >
>> > It would be interesting to know if this can be reproduced, and a full
>> > reproducer.
>> 
>> Hasn't this been fixed in glibc 2.38?  Via:
>> 
>> commit ab5aa2ee3d3f978e474803cbbc5fe805ad30e293
>> Author: Andreas Schwab <schwab@suse.de>
>> Date:   Thu Mar 23 16:46:20 2023 +0100
>> 
>>     dlopen: skip debugger notification for DSO loaded from sprof (bug 30258)
>>     
>>     Avoid inconsistent state in the debugger interface.
>
> Apologies that I missed that question.
>
> In Debian stable (Trixie), glibc 2.41-12+deb13u1, this error is no
> longer present.

I think we should then assume that your issue was bug 30258.

> I can run all commands of sprof(1), however none produces any content,
> i.e. something beyond the header lines. As I'm not a programmer, I
> don't know if this is something to worry about.
>
> helge@twentytwo:/tmp$ sprof -p libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile
> Flat profile:
>
> Each sample counts as 0,01 seconds.
>   %   cumulative   self              self     total
>  time   seconds   seconds    calls  us/call  us/call  name

Is it possible that no profiling events have been recorded?
How do you call functions in libdemo.so.1?

Thanks,
Florian