Re: [Qemu-devel] [PATCH v1 07/10] build-system: add clean-coverage target

["Daniel P. Berrangé" <berrange@redhat.com>]

On Mon, Jun 25, 2018 at 12:19:32PM +0100, Alex Bennée wrote:
> This can be used to remove any stale coverage data before any
> particular test run. This is useful for analysing individual tests.
> 
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> ---
>  Makefile               | 11 +++++++++++
>  docs/devel/testing.rst | 11 ++++++++---
>  2 files changed, 19 insertions(+), 3 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 7ed9cc4a21..2b3413a5ba 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -723,6 +723,14 @@ module_block.h: $(SRC_PATH)/scripts/modules/module_block.py config-host.mak
>  	$(addprefix $(SRC_PATH)/,$(patsubst %.mo,%.c,$(block-obj-m))), \
>  	"GEN","$@")
>  
> +ifdef CONFIG_GCOV
> +.PHONY: clean-coverage
> +clean-coverage:
> +	$(call quiet-command, \
> +		find . \( -name '*.gcda' -o -name '*.gcov' \) -type f -exec rm {} +, \
> +		"CLEAN", "coverage files")
> +endif
> +
>  clean:
>  # avoid old build problems by removing potentially incorrect old files
>  	rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h
> @@ -1073,6 +1081,9 @@ endif
>  		echo '')
>  	@echo  'Cleaning targets:'
>  	@echo  '  clean           - Remove most generated files but keep the config'
> +ifdef CONFIG_GCOV
> +	@echo  '  clean-coverage  - Remove coverage files'
> +endif
>  	@echo  '  distclean       - Remove all generated files'
>  	@echo  '  dist            - Build a distributable tarball'
>  	@echo  ''
> diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
> index 66ef219f69..a3652aea14 100644
> --- a/docs/devel/testing.rst
> +++ b/docs/devel/testing.rst
> @@ -161,9 +161,14 @@ GCC gcov support
>  ``gcov`` is a GCC tool to analyze the testing coverage by
>  instrumenting the tested code. To use it, configure QEMU with
>  ``--enable-gcov`` option and build. Then run ``make check`` as usual.
> -Reports can be obtained by running ``gcov`` command on the output
> -files under ``$build_dir/tests/``, please read the ``gcov``
> -documentation for more information.
> +
> +If you want to gather coverage information on a single test the ``make
> +clean-coverage`` target can be used to any existing coverage

s/to any/to delete any/

> +information before running a single test.
> +
> +Reports can be obtained by running ``gcov`` command
> +on the output files under ``$build_dir/tests/``, please read the
> +``gcov`` documentation for more information.

With the typo fixed

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>



Regards,
Daniel
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