gprof's broken in 7-CURRENT

Garrett Cooper youshi10 at u.washington.edu
Fri Nov 30 12:10:57 PST 2007


Garrett Cooper wrote:
> Nikos Ntarmos wrote:
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>>
>> On Thu, Nov 29, 2007 at 08:24:52PM +0000, Luoqi Chen wrote:
>>  
>>>> And to think that I mentioned this problem 5-6 months ago with gcc 
>>>> 4.2.x and now it finally gets publicity...
>>>>       
>>> Did I just hear someone volunteered to be a guinea pig?
>>>
>>> Garrett, would you like to try out my fix? It's actually quite simple,
>>>
>>>     
>> [...]
>>  
>>> This file is in the kernel tree, but the change only affects libc 
>>> build.
>>> If you don't want to redo a world build, you may copy the patched 
>>> profile.h
>>> to /usr/include/machine and "make all install" inside 
>>> /usr/src/lib/libc.
>>> Then re-link -pg compiled code and try it out.
>>>     
>>
>> Hi again.
>>
>> I couldn't wait for Garrett :) so I went on and tested your patch and
>> gprof seems to work fine for me (at least for the executables I was
>> interested in profiling anyway). This is i386 on a 7.0-BETA3 kernel and
>> 7.0-BETA1 world. What are the chances for this to be committed in time
>> for 7.0R?
>>
>> Thanks.
>>
>> \n\n
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>> Comment: Nikos Ntarmos <ntarmos at ceid.upatras.gr>
>>
>> iD8DBQFHT02Cm6J1ac+VFgoRAnaVAJ9n/WZY2nJU4Ym5qUFOBvg38p0lXQCfYDwT
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>> =J8RG
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>>   
>    I'll be sure to give it a toss when I get back home. I'd expect a 
> reply sometime tomorrow morning (PST)..
> Thanks again for all of your work!
> -Garrett

    Still doesn't work with pkg_install, unless I'm doing something 
incorrectly. Says something like '{blah} not in executable format' when 
I try and execute gprof as follows:

gprof pkg_info.gmon

    I think I chased this problem down to an inconsistency with GNU 
binutils before, but please note that I haven't had an opportunity to 
update my system for ~2 months (don't have direct access to the 
Internet; have to traffic files back and forth via my iBook and I've 
been busy lately with other things..).
    So I'm running 8-CURRENT, updated as of sometime 3rd week of October..
    Also, depending on what you're trying to compile for profiling 
purposes, you will have to recompile all dependent libraries, not just 
libc. I had to recompile libfetch and libarchive for pkg_install, 
otherwise stuff segfaulted and coredumped every time I ran the profiled 
apps.
Thanks,
-Garrett


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