linux-kernel - Re: [LTP] How to get the Linux kernel coverage data on ARM arch when I run LTP test?

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Message-ID: <52FDE52A.4070002@linux.vnet.ibm.com>
Date:	Fri, 14 Feb 2014 10:43:06 +0100
From:	Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>
To:	Naresh Kamboju <naresh.kamboju@...aro.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>, fhrbata@...hat.com,
	Paul Larson <paul.larson@...onical.com>
CC:	ltp-list <ltp-list@...ts.sourceforge.net>,
	ltp-coverage <ltp-coverage@...ts.sourceforge.net>,
	Mark Brown <mark.brown@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Deepak Saxena <dsaxena@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Milosz Wasilewski <milosz.wasilewski@...aro.org>
Subject: Re: [LTP] How to get the Linux kernel coverage data on ARM arch when
 I run LTP test?

On 14.02.2014 10:02, Naresh Kamboju wrote:
> root@...aro-developer:/tmp/linux-linaro-3.13-2014.01# gcov kernel/gcov/base.c -o
>  /sys/kernel/debug/gcov/tmp/linux-linaro-3.13-2014.01/kernel/gcov/
> File 'kernel/gcov/base.c'
> Lines executed:43.18% of 44
> Creating 'base.c.gcov'
> 
> root@...aro-developer:/tmp/linux-linaro-3.13-2014.01#
> 
> The above experiment gives coverage of a single file base.c when i run
> gcov manually.
> Is there any way to get Linux kernel coverage of all files after
> running LTP test cases ?

1. Reset coverage data: lcov -z
2. Run LTP (or any other test case)
3. Capture coverage data: lcov -c -o coverage.info
4. Generate HTML output: genhtml coverage.info -o out
5. View HTML output: <browser> out/index.html

More information on lcov can be found on the page behind the second URL
your quoted in your mail.


Regards,
  Peter Oberparleiter

-- 
Peter Oberparleiter
Linux on System z Development - IBM Germany

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