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List:       gentoo-user
Subject:    Re: [gentoo-user]  Re: What does it take to get debug symbols from
From:       Erik <esigra () gmail ! com>
Date:       2009-09-06 16:23:50
Message-ID: 4AA3E216.6080008 () gmail ! com
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Nikos Chantziaras skrev:
> On 09/06/2009 11:22 AM, Erik wrote:
>> Nikos Chantziaras skrev:
>>> On 09/06/2009 09:43 AM, Erik wrote:
>>>> I have emerged glibc with "debug -glibc-omitfp" and restarted the
>>>> system. But when I execute "valgrind
>>>> /usr/lib/mozilla-firefox/firefox" I
>>>> only see things like this:
>>>> Invalid read of size 4
>>>>      at 0x4018620: (within /lib/ld-2.9.so)
>>>>
>>>> No filename:linenumber here. What does it take to get debug symbols
>>>> from
>>>> /lib/ld-2.9.so?
>>>
>>> Don't emerge with "debug -glibc-omitfp".  Emerge with "splitdebug" in
>>> FEATURES.
>> Done:
>> Conditional jump or move depends on uninitialised value(s)
>>     at 0x400C0AC: _dl_relocate_object (in /lib/ld-2.9.so)
>>
>> Now it at least shows the function name. But still no
>> filename:linenumber. Maybe I need "debug" for that after all?
>
> Just "-g" in CFLAGS.

Ok, I added this to /etc/portage/env/sys-libs/glibc-2.9_p20081201-r2:
pre_pkg_setup() {
         if ! hasq -g $CFLAGS ; then
                  elog "Adding -g to CFLAGS for $PN-$PV to locate errors
reported by Valgrind."
                  CFLAGS="$CFLAGS -g"
         fi
}


Then I emerged glibc. It printed the elog message that I added and
included -g in the compile commands. Then I restarted the system. But
still no filename:linenumber in Valgrind.


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