error while building leon3 with gcov flags

[Vijay Kumar Banerjee]

On 10 June 2018 at 01:28, Joel Sherrill <joel at rtems.org> wrote:

>
>
> On Sat, Jun 9, 2018, 2:29 PM Vijay Kumar Banerjee <
> vijaykumar9597 at gmail.com> wrote:
>
>> 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
>>
>> =============================
>>
>
> I completely understood that. When you look in config.log in what looks to
> be a leon3 subdirectory, what's in the log file?
>
> I have attached the config.log file .


> My reading of the gcc manual was that one of those options implicitly
> added an option to link with libgcov.a. please confirm that.
>
yes , -fprofile-arcs implicitly adds option to link with libgcov

>
>>
>>
>>>
>>>
>>>>>>
>>>>>> 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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