gcov support in Covoar

[Vijay Kumar Banerjee]

On 14 May 2018 at 21:21, Joel Sherrill <joel at rtems.org> wrote:

>
>
> On Mon, May 14, 2018 at 10:19 AM, Vijay Kumar Banerjee <
> vijaykumar9597 at gmail.com> wrote:
>
>> Hello,
>>
>> The coverage report is showing some data now (txt only). There is still
>> some work needed to be done for it to get merged with the main repo. As it
>> depends on the ongoing work on the covoar.cc and coverage.py, meanwhile I
>> want to get started with the gcov support in covoar as I already have some
>> coverage data in txt format to compare with .
>>
>> I would like to know the following points to get started:
>>
>>     1. What is the current state of the gcov support in covoar. I can see
>> work on GcovData and GcovFunction data in covoar, what's the current status
>> of it ?
>>
>
> Technically unknown, potentially bit rotted.
>
Seems like it will take some time before it starts making sense .

>
>
>>
>>     2. Did it use to run at some point? seeing it in action will be very
>> helpful.
>>
>
> It used to produce .gcov files that could be processed by gcov and produce
> reports.
>
Then our very first objective is to get the .gcov file output only then can
we proceed with the  discripancies

>
> Once you started to compare the reports to the native reports from covoar,
> you would sometimes see places that covoar thought some code was executed
> that did not show up in the gcov generated report. When I investigated, I
> got far enough to know we had executed the code in question.
>
>
>>
>>     3. What are the listed blockers rn ? Other than the reliability of
>> the report .
>>
>
> That's it. Get it working and then let's work on automation, use of lcov,
> etc. Along the way, I am sure we will spot the difference in reporting.
> Then that will have to be fixed.
>
>
>>     4. are there any tickets related to gcov?
>>
>
> Not from RTEMS' perspective.
>
> One challenge we had previously is that the .gcov file format was only
> documented in the header file. That was why I asked for someone from the
> gcc community to help us once we spot difference. Hopefully they can help
> us figure out what is wrong with the file covoar is producing.
>

>> Please add any suggestions or references that might help me get started
>> properly .
>>
>> Thank you,
>>
>> Vijay
>>
>>
>>
>
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