error while building leon3 with gcov flags

Vijay Kumar Banerjee vijaykumar9597 at gmail.com
Sat Jun 9 19:29:18 UTC 2018 

On 10 June 2018 at 00:55, Joel Sherrill <joel at rtems.org> wrote:

>
>
> On Sat, Jun 9, 2018, 2:22 PM Vijay Kumar Banerjee <
> vijaykumar9597 at gmail.com> wrote:
>
>> On 9 June 2018 at 19:56, Joel Sherrill <joel at rtems.org> wrote:
>>
>>>
>>>
>>> On Sat, Jun 9, 2018, 6:01 AM Vijay Kumar Banerjee <
>>> vijaykumar9597 at gmail.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> I was going through the gcc manual for gcov
>>>> https://gcc.gnu.org/onlinedocs/gcc/Gcov-and-Optimization.html#Gcov-and-
>>>> Optimization
>>>>
>>>> It mentions that the flag -fprofile-arcs is necessary for generating
>>>> the .gcda files.
>>>> I have tried it with a small hello world program to see the reports,
>>>> and it seems
>>>> that for .gcda files this flag is necessary.
>>>>
>>>> when I include the flag `-fprofile-arcs` with `-ftest-coverage` and
>>>> then make
>>>> I'm getting the following error.
>>>>
>>>> =============================
>>>> checking whether the C compiler works... no
>>>> configure: error: in `/home/lunatic/development/
>>>> rtems/kernel/leon3/sparc-rtems5/c/leon3':
>>>> configure: error: C compiler cannot create executables
>>>> See `config.log' for more details
>>>> gmake[2]: *** [Makefile:731: leon3] Error 1
>>>> gmake[2]: Leaving directory '/home/lunatic/development/
>>>> rtems/kernel/leon3/sparc-rtems5/c'
>>>> gmake[1]: *** [Makefile:289: all-recursive] Error 1
>>>> gmake[1]: Leaving directory '/home/lunatic/development/
>>>> rtems/kernel/leon3/sparc-rtems5/c'
>>>> gmake: *** [Makefile:414: all-recursive] Error 1
>>>>
>>>> =============================
>>>>
>>>
>>> It may be looking for a symbol provided by libgov.a. We don't have that
>>> based on how we do coverage.
>>>
>>> The normal approach is to add it to the RTEMS dummy crt0.c in newlib.
>>>
>>
>> er.... looks confusing, are there any instructions ? :)
>>
>
> What's the error first? What was in config.log in the directory with the
> failure?
>
> I added this.

CFLAGS_OPTIMIZE_V += -fprofile-arcs -ftest-coverage

when I `make` it, I see this error.

=============================
checking whether the C compiler works... no
configure: error: in `/home/lunatic/development/rtems/kernel/leon3/sparc-
rtems5/c/leon3':
configure: error: C compiler cannot create executables
See `config.log' for more details
gmake[2]: *** [Makefile:731: leon3] Error 1
gmake[2]: Leaving directory '/home/lunatic/development/
rtems/kernel/leon3/sparc-rtems5/c'
gmake[1]: *** [Makefile:289: all-recursive] Error 1
gmake[1]: Leaving directory '/home/lunatic/development/
rtems/kernel/leon3/sparc-rtems5/c'
gmake: *** [Makefile:414: all-recursive] Error 1

=============================



>
>
>>>>
>>>> On 8 June 2018 at 01:13, Vijay Kumar Banerjee <vijaykumar9597 at gmail.com
>>>> > wrote:
>>>>
>>>>>
>>>>>
>>>>> On Fri, 8 Jun 2018, 01:09 Joel Sherrill, <joel at rtems.org> wrote:
>>>>>
>>>>>> Bringing in Krzysztof. Hoping he can get us on the right track here.
>>>>>>
>>>>>> I don't think you can run GcovData.cc independent of a covoar run.
>>>>>>
>>>>> Understood.
>>>>>
>>>>>> If you can figure out how to write a unit test that would be helpful.
>>>>>>
>>>>> Will try to do that if possible.
>>>>>
>>>>>>
>>>>>> On Thu, Jun 7, 2018 at 2:29 PM, Vijay Kumar Banerjee <
>>>>>> vijaykumar9597 at gmail.com> wrote:
>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> I was looking into the code in GcovData.cc to see how it works
>>>>>>> and what it's doing, too me it looked like very messed up, I couldn't
>>>>>>> understand (yet) what it's trying to do.
>>>>>>> Is there some way I can manually run it for one file?
>>>>>>> Is there any place where I can read how it was intended to work?
>>>>>>> Or something like a flow diagram?
>>>>>>>
>>>>>>>
>>>>>>> -- vijay
>>>>>>>
>>>>>>> On 7 June 2018 at 02:56, Vijay Kumar Banerjee <
>>>>>>> vijaykumar9597 at gmail.com> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, 7 Jun 2018, 02:39 Joel Sherrill, <joel at rtems.org> wrote:
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Wed, Jun 6, 2018, 3:56 PM Vijay Kumar Banerjee <
>>>>>>>>> vijaykumar9597 at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> On 7 June 2018 at 01:48, Joel Sherrill <joel at rtems.org> wrote:
>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Wed, Jun 6, 2018, 2:07 PM Vijay Kumar Banerjee <
>>>>>>>>>>> vijaykumar9597 at gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> On 6 June 2018 at 20:49, Joel Sherrill <joel at rtems.org> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> I can't duplicate this. My configure command was:
>>>>>>>>>>>>>
>>>>>>>>>>>>> ../rtems/configure --target=sparc-rtems5
>>>>>>>>>>>>> --enable-rtemsbsp=leon3 --prefix=/home/joel/rtems-work/tools/5
>>>>>>>>>>>>> \
>>>>>>>>>>>>>    --disable-networking --enable-posix --disable-smp
>>>>>>>>>>>>> --disable-multiprocessing \
>>>>>>>>>>>>>    --enable-tests --enable-cxx --enable-maintainer-mode
>>>>>>>>>>>>>
>>>>>>>>>>>>> What was yours?
>>>>>>>>>>>>>
>>>>>>>>>>>>> I didn't have --enable-cxx and --enable-maintainer-more.
>>>>>>>>>>>>
>>>>>>>>>>>> I made some tries and somehow it's perfectly working now.
>>>>>>>>>>>>
>>>>>>>>>>>> I am trying to find out now how covoar generates the reports.
>>>>>>>>>>>> I made a file with a list of all gcno in score/ and run with -g
>>>>>>>>>>>> argument
>>>>>>>>>>>> now I'mg seeing the following error while running covoar
>>>>>>>>>>>>
>>>>>>>>>>>> ======================
>>>>>>>>>>>> Generating Gcov reports...
>>>>>>>>>>>> Processing file: libscore_a-allocatormutex.gcno
>>>>>>>>>>>> Unable to open libscore_a-allocatormutex.gcno
>>>>>>>>>>>> Processing file: libscore_a-apimutexisowner.gcno
>>>>>>>>>>>> Unable to open libscore_a-apimutexisowner.gcno
>>>>>>>>>>>> Processing file: libscore_a-apimutexlock.gcno
>>>>>>>>>>>> Unable to open libscore_a-apimutexlock.gcno
>>>>>>>>>>>> Processing file: libscore_a-apimutexunlock.gcno
>>>>>>>>>>>> Unable to open libscore_a-apimutexunlock.gcno
>>>>>>>>>>>> Processing file: libscore_a-chain.gcno
>>>>>>>>>>>> Unable to open libscore_a-chain.gcno
>>>>>>>>>>>> Processing file: libscore_a-chainnodecount.gcno
>>>>>>>>>>>> .
>>>>>>>>>>>> .
>>>>>>>>>>>> .
>>>>>>>>>>>> ======================
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I suspect this is another instance of the path issues inside the
>>>>>>>>>>> build tree you and Cillian fixed earlier.
>>>>>>>>>>>
>>>>>>>>>>> correcting the path worked.
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Submit a patch for this. It needs fixing to get 5onyour next issue.
>>>>>>>>>
>>>>>>>> It just needed the absolute path to be fed.
>>>>>>>> here's what I did.
>>>>>>>> I manually 'find' all the gcno files under score.
>>>>>>>> wrote it all in a file separated by newlines.
>>>>>>>> fed that file as an argument to covoar.
>>>>>>>> and that brought me here.
>>>>>>>>
>>>>>>>> So when we write script, these are the
>>>>>>>> things that will be done by the script.
>>>>>>>>
>>>>>>>> Once everything strats running manually,
>>>>>>>> we can proceed to write scripts.
>>>>>>>>
>>>>>>>>>
>>>>>>>>>> Now I'm getting this error.
>>>>>>>>>>
>>>>>>>>>> Generating Gcov reports...
>>>>>>>>>> Processing file: sparc-rtems5/c/leon3/cpukit/
>>>>>>>>>> score/src/libscore_a-kern_tc.gcno
>>>>>>>>>> ERROR: Unable to read string from gcov file
>>>>>>>>>> ERROR: Unable to read string length from gcov file
>>>>>>>>>> ERROR: Unable to read Function starting line number
>>>>>>>>>> Segmentation fault (core dumped)
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Welcome to GSoC! You are now in new territory. :)
>>>>>>>>>
>>>>>>>> So here the real work begins!
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Dig in and see what went wrong. Be aware.that GCC file formats may
>>>>>>>>> (or may not) be subject to.changing over time and this could just be bitrot.
>>>>>>>>>
>>>>>>>> I got started with it.
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Gcov-dump is installed with the compiler.
>>>>>>>>>
>>>>>>>>> You should check it we have a .h file describing the file and it
>>>>>>>>> is out of date.
>>>>>>>>>
>>>>>>>> I'll look into it.
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Also I think we now should bring the gsov maintainer in.
>>>>>>>>>
>>>>>>>> The covoar's gcov support needs to be reworked.
>>>>>>>> We can get the help of the expert here.
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Good job!
>>>>>>>>>
>>>>>>>> Thanks. :)
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>>>> On Wed, Jun 6, 2018 at 9:40 AM, Vijay Kumar Banerjee <
>>>>>>>>>>>>> vijaykumar9597 at gmail.com> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I have added the following changes in the
>>>>>>>>>>>>>> bsps/sparc/leon3/config/leon3.cfg
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ----------
>>>>>>>>>>>>>> CFLAGS_OPTIMIZE_V = -Os -g
>>>>>>>>>>>>>> CFLAGS_OPTIMIZE_V += -ftest-coverage
>>>>>>>>>>>>>> -------
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> While trying to build with these flags, I got a bunch of
>>>>>>>>>>>>>> the following errors:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ==========
>>>>>>>>>>>>>> {standard input}: Assembler messages:
>>>>>>>>>>>>>> {standard input}:6510: Error: can't resolve
>>>>>>>>>>>>>> `.data._SPARC_Counter' {.data._SPARC_Counter section} - `.LLtext0' {.text
>>>>>>>>>>>>>> section}
>>>>>>>>>>>>>> {standard input}:6511: Error: can't resolve
>>>>>>>>>>>>>> `.data._SPARC_Counter' {.data._SPARC_Counter section} - `.LLtext0' {.text
>>>>>>>>>>>>>> section}
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ===================
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> after the `make install` I do get a lot of .gcno files, and no
>>>>>>>>>>>>>> executables.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -- vijay
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>> devel mailing list
>>>>>>>>>>>>>> devel at rtems.org
>>>>>>>>>>>>>> http://lists.rtems.org/mailman/listinfo/devel
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>
>>>>>>
>>>>
>>
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