build-system: add coverage-report target

This will build a coverage report under the current directory in
reports/coverage. At the users option a report can be generated by
directly invoking something like:

  make foo/bar/coverage-report.html

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/Makefile b/Makefile
index 9731ec1bb7b61b08ad409fc68d9b67cc6ba15490..2da686be3363d1d45f31997cb9907be68e6cfe2c 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -986,6 +986,16 @@ docs/interop/qemu-qmp-ref.dvi docs/interop/qemu-qmp-ref.html \
     docs/interop/qemu-qmp-ref.txt docs/interop/qemu-qmp-ref.7: \
        docs/interop/qemu-qmp-ref.texi docs/interop/qemu-qmp-qapi.texi
 
+# Reports/Analysis
+
+%/coverage-report.html:
+       @mkdir -p $*
+       $(call quiet-command,\
+               gcovr -p --html --html-details -o $@, \
+               "GEN", "coverage-report.html")
+
+.PHONY: coverage-report
+coverage-report: $(CURDIR)/reports/coverage/coverage-report.html
 
 ifdef CONFIG_WIN32
 
@@ -1095,6 +1105,9 @@ endif
        @echo  'Documentation targets:'
        @echo  '  html info pdf txt'
        @echo  '                  - Build documentation in specified format'
+ifdef CONFIG_GCOV
+       @echo  '  coverage-report - Create code coverage report'
+endif
        @echo  ''
 ifdef CONFIG_WIN32
        @echo  'Windows targets:'

diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
index 7f04ca104e0d2902d6097407824fb463e9a2cd79..5e19cd50da8d1291520795f50570258df3912eee 100644 (file)
--- a/docs/devel/testing.rst
+++ b/docs/devel/testing.rst
@@ -166,9 +166,14 @@ 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.
+You can generate a HTML coverage report by executing ``make
+coverage-report`` which will create
+./reports/coverage/coverage-report.html. If you want to create it
+elsewhere simply execute ``make /foo/bar/baz/coverage-report.html``.
+
+Further analysis can be conducted by running the ``gcov`` command
+directly on the various .gcda output files. Please read the ``gcov``
+documentation for more information.
 
 QEMU iotests
 ============