[CentOS] Bug Policy [was Re: Does sprof work on CentOS5?]

Johnny Hughes johnny at centos.org
Tue Jul 29 11:59:04 UTC 2008

Hywel Richards wrote:
> Hywel Richards wrote:
>> No matter how I try, I can't seem to get a library profile from sprof 
>> on CentOS5.
>> Does anyone know if sprof actually works on CentOS5? I'd be very 
>> interested to hear if anyone is using it successfully.
>> At the moment I'm trying something like this to get the dump:
>>    LD_LIBRARY_PATH=. LD_PROFILE=libmy.so ./mymain
>> where libmy.so is the library I want to profile, and mymain is the 
>> executable which links to it.
>> This appears to create the profile dump successfully (which appears at 
>> /var/tmp/libmy.so.profile), but when I try to get a readable profile 
>> using sprof it fails:
>>    $ sprof libmy.so /var/tmp/libmy.so.profile
>>    sprof: failed to load shared object `libmy.so'
>> I have a CentOS4 machine here, and doing the above on that works fine, 
>> but I've had no luck at all on CentOS5 (all currently up-to-date).
>> Can anyone help? (Please!)
> Given that I can get this to work well on a CentOS4 machine, and I have 
> tried lots of minor trivial changes to command-line, etc, but still fail 
> on CentOS5, does anyone know what I can do or where I can go to progress 
> this further?
> My current guess is that it is a (probably very trivial) bug, although I 
> recognise there still the possibility that this is simply a usage 
> problem (however, if that is so, the usage since centos4 has clearly 
> changed).
> A more straightforward program I might have a go at debugging, but I 
> don't feel competent on this one - sprof is part of the glibc package.
> The glibc pages (http://www.gnu.org/software/libc/bugs.html) say that 
> bugs should be reported to the distribution project first.
> I would also be interested to know what the general policy is regarding 
> what to do about bugs on Centos. I presume there is no way for people 
> involved in centos to make changes directly, otherwise the distribution 
> stops being a clone, so bugs/fixes on the centos bugzilla presumably get 
> fed back to redhat at some point, and then eventually trickle down? (Is 
> there a webpage somewhere explaining how this works? I know the FAQ 
> states that there is no relationship with redhat, but surely they must 
> exploit the bug reports somehow).
> Anyway, should I report this on the CentOS bugzilla?
> Would someone take it up if I did?
> I assume that reporting it to redhat would be inappropriate.
> If not centos, should I go on to report it to glibc?


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