From: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
To: Christophe Taillan <taillanchristophe@gmail.com>,
ltp-list@lists.sourceforge.net
Subject: Re: [LTP] Questions about gcov/lcov and Fortran 90
Date: Tue, 16 Sep 2014 16:35:58 +0200 [thread overview]
Message-ID: <54184ACE.3080200@linux.vnet.ibm.com> (raw)
In-Reply-To: <CAOi2z=xF76SVQZ+-pGJevr8BiSXVh4O9jVYGnfJ2kOU-Gne6HA@mail.gmail.com>
On 14.09.2014 14:27, Christophe Taillan wrote:
> I am currently using gcov/lcov to study coverage of a large Fortran 90
> code. The goal is to find and erase unused code.
> Due to the size of the program, I'm looking for a way to automatize the
> process.
>
> But I've got some trouble :
> - with nested "if": if the main condition is not validated, all the
> code in the "if" block should be tagged as "####", in fact, it seems
> that other "if" lines are not...
> - lines read once seems not to be tagged as "1",
> - lines like "use some_module" are not tagged either.
>
> So my question is, is there any existing tools to manage with these
> problems or did I miss any option in gcov?
gcov can only report coverage data for lines for which GCC generated
actual code. While I don't have any experience with Fortran 90, my guess
would be that "use some_module" does not actually generate code.
Also turning off all optimization options when compiling the code in
question can help improve the accuracy of gcov/lcov. See also:
https://gcc.gnu.org/onlinedocs/gcc/Gcov-Intro.html
Regards,
Peter Oberparleiter
--
Peter Oberparleiter
Linux on System z Development - IBM Germany
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prev parent reply other threads:[~2014-09-16 14:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAOi2z=w4wLnZ_8Uf9226G5n_nXwE4DQKgd=BKqn1PWSnWgdMOg@mail.gmail.com>
2014-09-14 12:27 ` [LTP] Questions about gcov/lcov and Fortran 90 Christophe Taillan
2014-09-16 14:35 ` Peter Oberparleiter [this message]
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