Re: [LTP] [Ltp-coverage] Finding True Application Code Coverage in case of heteregenous Executable Environment

[Peter Oberparleiter <oberpar@linux.vnet.ibm.com>]

Hi Subrata,

On 30.01.2011 20:28, Subrata Modak wrote:
> Is there a way to find true application code coverage for a
> heterogeneous Executable Environment, where the application can consist
> of:

Short answer: no

>       1. C Programs(only for which .gcno and .gcda files can be
>          generated)

Simply use lcov with gcc.

>       2. Shell Scripts,

See http://code.google.com/p/shcov/

>       3. Perl Scripts,

See http://search.cpan.org/~pjcj/Devel-Cover-0.73/lib/Devel/Cover.pm

I've started work on converting code coverage data from that tool into 
lcov format but haven't finished that yet.

>       4. Python Scripts,

I don't have experience with python.

>       5. etc ?

Code coverage measurements all rely on target language specific 
mechanisms. There is no universal mechanism to collect code coverage 
from any language.

> Is there any by which i can also count the no. of lines/ branches/
> Functions executed by the Scripts ??

See the references above.

> Another question. when i tried to execute the following, it took into
> consideration only the .gcda of the C executables invoked by the
> program:
>       1. lcov --directory /root/LTP-GIT/ltp/ --zerocounters
>       2. (cd /opt/ltp/; ./runltp -f math)
>       3. lcov --directory /root/LTP-GIT/ltp/ --capture --output-file
>          app.info
>       4. genhtml app.info
>
> Instead i wanted it consider all C files for which .gcno are present
> and .gcda are not present(as i did not execute the corresponding
> binaries), so to truly find the exact % of C files covered and % left
> out from the whole trickled down /root/LTP-GIT/ltp/ directory.

That is what the --initial option of lcov is for. See the man page of 
lcov for more information.


Regards,
   Peter


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