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Re: [Qemu-devel] [RFC PATCH 4/5] build-system: add clean-coverage target
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [Qemu-devel] [RFC PATCH 4/5] build-system: add clean-coverage target |
Date: |
Wed, 20 Jun 2018 17:33:23 -0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 |
Hi Alex,
On 06/20/2018 10:20 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>
> ---
> Makefile | 11 +++++++++++
> docs/devel/testing.rst | 11 ++++++++---
> 2 files changed, 19 insertions(+), 3 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index e46f2b625a..cb4af8bf80 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -725,6 +725,14 @@ 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")
I also see ".gcno" files.
>From GCC man page:
-ftest-coverage
Produce a notes file that the gcov code-coverage
utility can use to show program coverage. Each
source file's note file is called auxname.gcno.
Tested-by: Philippe Mathieu-Daudé <address@hidden>
Adding gcno:
Reviewed-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
> @@ -1075,6 +1083,9 @@ 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 ``$build_dir/tests/``, please read the ``gcov``
> -documentation for more information.
> +
> +If you want to gather coverage information on a single test the ``make
> +clean-coverage`` target can be used to any existing coverage
> +information before running a single test.
> +
> +Reports can be obtained by running ``gcov`` command
> +on the output files under ``$build_dir/tests/``, please read the
> +``gcov`` documentation for more information.
>
> QEMU iotests
> ============
>
- Re: [Qemu-devel] [RFC PATCH 2/5] .gitignore: add .gcov files, (continued)