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.ben...@linaro.org> Reviewed-by: Daniel P. Berrangé <berra...@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4...@amsat.org>--- 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..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 ============ -- 2.17.1