IDE/Discussion/General/profiling usage of libc/List of Posts
 
Forum Topic - profiling usage of libc: (6 Items)
   
Update
Hans-Peter Reichert
08/19/2009 7:53 AM
post36246
profiling usage of libc   
I want to  analize libc usage of a certain binary,
but I can't find an instrumented libc.so.
so is there any other way than writing a LD_PRELOAD libc wrapper to get the -finstrument-functions in libc?

TIA
hp
Colin Burgess
08/19/2009 11:04 AM
post36271
Re: profiling usage of libc   
You could compile libc with -finstrument-functions, but you might have to be careful that any functions that 
libprofiling uses don't cause a recursive loop-o-death!

Hans-Peter Reichert wrote:
> I want to  analize libc usage of a certain binary,
> but I can't find an instrumented libc.so.
> so is there any other way than writing a LD_PRELOAD libc wrapper to get the -finstrument-functions in libc?
> 
> TIA
> hp
> 
> 
> 
> _______________________________________________
> 
> General
> http://community.qnx.com/sf/go/post36246
> 

-- 
cburgess@qnx.com
Hans-Peter Reichert
08/19/2009 11:14 AM
post36279
AW: profiling usage of libc   
:-/ I should add the answers I don't like to hear to my posts 


>-----Ursprüngliche Nachricht-----
>Von: Colin Burgess [mailto:community-noreply@qnx.com] 
>Gesendet: Mittwoch, 19. August 2009 17:04
>An: general-ide
>Betreff: Re: profiling usage of libc
>
>You could compile libc with -finstrument-functions, but you 
>might have to be careful that any functions that libprofiling 
>uses don't cause a recursive loop-o-death!
>
>Hans-Peter Reichert wrote:
>> I want to  analize libc usage of a certain binary, but I 
>can't find an 
>> instrumented libc.so.
>> so is there any other way than writing a LD_PRELOAD libc 
>wrapper to get the -finstrument-functions in libc?
>> 
>> TIA
>> hp
>> 
>> 
>> 
>> _______________________________________________
>> 
>> General
>> http://community.qnx.com/sf/go/post36246
>> 
>
>--
>cburgess@qnx.com
>
>
>
>_______________________________________________
>
>General
>http://community.qnx.com/sf/go/post36271
>
> 
 
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Peter Martin(deleted)
08/19/2009 11:21 AM
post36284
Re: AW: profiling usage of libc   
On Wed, 19 Aug 2009, Hans-Peter Reichert wrote:

>Date: Wed, 19 Aug 2009 11:14:16 -0400 (EDT)
>From: Hans-Peter Reichert <community-noreply@qnx.com>
>Reply-To: post36279@community.qnx.com
>To: general-ide <post36279@community.qnx.com>
>Subject: AW: profiling usage of libc
>
> :-/ I should add the answers I don't like to hear to my posts
>

Isn't it just avoiding passing those compile options to the lib/c/prof
section of the code?

Peter

>
>> -----Ursprüngliche Nachricht-----
>> Von: Colin Burgess [mailto:community-noreply@qnx.com]
>> Gesendet: Mittwoch, 19. August 2009 17:04
>> An: general-ide
>> Betreff: Re: profiling usage of libc
>>
>> You could compile libc with -finstrument-functions, but you might have to be
>> careful that any functions that libprofiling uses don't cause a recursive
>> loop-o-death!
>>
>> Hans-Peter Reichert wrote:
>>> I want to  analize libc usage of a certain binary, but I can't find an
>>> instrumented libc.so.  so is there any other way than writing a LD_PRELOAD
>>> libc wrapper to get the -finstrument-functions in libc?
>>>
>>> TIA
>>> hp
Colin Burgess
08/19/2009 11:24 AM
post36288
Re: AW: profiling usage of libc   
PR37662 tracks the fact that this would be "nice to do".

So many nice things to do, why must people load me up with "must do" PRs instead! ;-)

Peter Martin wrote:
> On Wed, 19 Aug 2009, Hans-Peter Reichert wrote:
> 
>> Date: Wed, 19 Aug 2009 11:14:16 -0400 (EDT)
>> From: Hans-Peter Reichert <community-noreply@qnx.com>
>> Reply-To: post36279@community.qnx.com
>> To: general-ide <post36279@community.qnx.com>
>> Subject: AW: profiling usage of libc
>>
>> :-/ I should add the answers I don't like to hear to my posts
>>
> 
> Isn't it just avoiding passing those compile options to the lib/c/prof
> section of the code?
> 
> Peter
> 
>>> -----Ursprüngliche Nachricht-----
>>> Von: Colin Burgess [mailto:community-noreply@qnx.com]
>>> Gesendet: Mittwoch, 19. August 2009 17:04
>>> An: general-ide
>>> Betreff: Re: profiling usage of libc
>>>
>>> You could compile libc with -finstrument-functions, but you might have to be
>>> careful that any functions that libprofiling uses don't cause a recursive
>>> loop-o-death!
>>>
>>> Hans-Peter Reichert wrote:
>>>> I want to  analize libc usage of a certain binary, but I can't find an
>>>> instrumented libc.so.  so is there any other way than writing a LD_PRELOAD
>>>> libc wrapper to get the -finstrument-functions in libc?
>>>>
>>>> TIA
>>>> hp
> 
> 
> 
> _______________________________________________
> 
> General
> http://community.qnx.com/sf/go/post36284

-- 
cburgess@qnx.com
Elena Laskavaia
08/22/2009 4:29 PM
post36471
Re: profiling usage of libc   
Compiling whole libc with  -finstrument-functions would definitely cause 
problems but if you are interested in specific function, you can try to 
do it yourself
by checking out libc from svn and changing makefile flags to compile 
SPECIFIC files
with this option.

Colin Burgess wrote:
> You could compile libc with -finstrument-functions, but you might have to be careful that any functions that 
libprofiling uses don't cause a recursive loop-o-death!
>
> Hans-Peter Reichert wrote:
>   
>> I want to  analize libc usage of a certain binary,
>> but I can't find an instrumented libc.so.
>> so is there any other way than writing a LD_PRELOAD libc wrapper to get the -finstrument-functions in libc?
>>
>> TIA
>> hp
>>
>>
>>
>> _______________________________________________
>>
>> General
>> http://community.qnx.com/sf/go/post36246
>>
>>     
>
>

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