Re: [Qemu-devel] [PATCH v3 07/20] build-system: add clean-coverage target

[Philippe Mathieu-Daudé]

Hi Alex,

On 07/02/2018 11:30 AM, 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 <address@hidden>
> Reviewed-by: Daniel P. Berrangé <address@hidden>
> ---
> 
> v2
>   - s/to any/to delete any/
> ---
>  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")

Would "find $(BUILD_DIR) ..." be safer?

Regardless:
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Tested-by: Philippe Mathieu-Daudé <address@hidden>

> +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..7f04ca104e 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 ``$build_dir/tests/``, please read the ``gcov``
> -documentation for more information.
> +
> +If you want to gather coverage information on a single test the ``make
> +clean-coverage`` target can be used to delete any existing coverage
> +information before running a single test.
> +
> +Reports can be obtained by running ``gcov`` command
> +on the output files under ``$build_dir/tests/``, please read the
> +``gcov`` documentation for more information.
>  
>  QEMU iotests
>  ============
>